Journal of Japan Society of Civil Engineers, Ser. F4 (Construction and Management)
Online ISSN : 2185-6605
ISSN-L : 2185-6605
Volume 75, Issue 2
Displaying 1-23 of 23 articles from this issue
Special Issue(Paper)
  • Masanori JOKO, Akio MORIWAKI, Katsunori MIYAMOTO, Naoko FUKUSHI, Nobuy ...
    2019 Volume 75 Issue 2 Pages I_1-I_14
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     Drawings of the public works are described theoretically accurate dimensions. Allowable values are described in the final delivery standard with measurement items and specification values.On the other hand, drawings of the manufacturing industry, dimensional tolerance and geometric tolerance are described as allowable values in addition to dimensions. 3D CAD software is able to create complicated shape of 3D models. It seems that setting of tolerance about geometric characteristics of 3D models are more suited to using geometrical tolerance rather than dimensional tolerance. Geometrical tolerance could describe information more accurately.

     In this research, literature survey of 3D tolerance was conducted. This paper extracted and analyzed effects by applying geometric tolerance from viewpoints of management engineering. This paper reported the evaluation results how to solve problems of public works applying geometric tolerance.

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  • Hiroshi TSUTSUMI, Kengo OBAMA, Aoi NAKAMURA, Keigo KOIZUMI
    2019 Volume 75 Issue 2 Pages I_15-I_26
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     Various monitoring data has been obtained to prevent slope disasters. In this paper, based on GNSS data, We propose a method of change point detection for slope management that automatically detects whether or not displacement has occurred on the slope. In particular, we proposed a methodology to set management indicator for change point detection, considering slope-management by change point detection of GNSS data using Change Finder. Moreover, we verified the applicability and scope of Change Finder, such as whether or not change points can be detected by distinguishing measurement error included in GNSS data from sudden slope displacement, by using the actually GNSS data obtained from expressway. As a result, we showed that change points can be detected when the displacement of the slope exceeds 2.5 times the sample standard deviation of GNSS data.

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  • Tomotaka FUKUOKA, Takahiro MINAMI, Wataru URATA, Makoto FUJIU, Junichi ...
    2019 Volume 75 Issue 2 Pages I_27-I_35
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     A bridge inspection needs much cost. It causes a lack of engineer and budget. So some local government couldn’t complete bridge aggressive preventive maintenance in Japan. We focus on image based bridge inspection technique which is research of automated bridge inspection. Some previous researches proposed deep learning based method for detect crack on concrete surface image of bridge and show high accuracy of crack detection. However, the evaluation of robustness of such method to the real bridge surface images is not enough yet. One of the reason of this problem is lack of training data. To make huge dataset needs much cost. In this paper, we proposed a data augmentation method with GAN for solve this problem. We evaluated our method compared with traditional data augmentation method and the results show that our proposed method has high performance than traditional one.

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  • Wakana ASANO, Yasuhiro KODA, Ichiro IWAKI
    2019 Volume 75 Issue 2 Pages I_36-I_49
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     While the deterioration of infrastructure has become a serious social problem, it is extremely difficult for the bridges managed by local governments which have meager financial and technological resources to conduct the daily inspection in addition to the periodic one. In this research, the bridge self-maintenance model led by local residents was constructed by developing “Simple Bridge Inspection Check Sheet” and “Bridge Map”. As the results, the validity of the daily inspection results by residents and the usefulness of “Bridge Map” visualizing the inspection data were recognized. Also, the self-maintenance cycle introducing “Bridge Cleanup Activity” for removing the deterioration factors of bridge was rotated. Further, this model could be used by not only residents, but also in-house engineers and students, and expand in various regions.

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  • Takahiro MINAMI, Wataru URATA, Makoto FUJIU, Tomotaka FUKUOKA, Junichi ...
    2019 Volume 75 Issue 2 Pages I_50-I_57
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     The Ministry of Land, Infrastructure Transport and Tourism promote to prevent and preserve maintenance for bridges under rapidly aging infrastracture. Periodic inspection is required for all bridges, but proximity visual inspection currently is not efficient because of lack of money, inspector’s skill and inspectors. Many alternative systems are being developed to solve these problems under this conditions. In this research, "Image Visual Diagnostic System" are proposed to carry out the efficiency bridge inspection, which diagnoses damage by looking at images taken by a super high resolution camera. In this research, we focused on two issues, first one is "the influence of image attributes on diagnostic results" and second one is "the effect of inspection skills on diagnostic results". Proposing system can be solve previous problems around the bridge inspection, then we examine the influence between image attribute and inspection skill. It became clear that results of inspection are not influenced by inspection skills due to precision, recall, and F value are all positive.

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  • Tomonaru Hosokawa, Masaaki Minami
    2019 Volume 75 Issue 2 Pages I_58-I_72
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     There are concerns about securing resources and ensuring transmission of skill in the recent construction industry, especially municipal government have more concerns over future public works. Because of these concerns, the needs is growing over introduction of the construction management(CM) method, although the introduction have not become widely. Various approaches have been taken to ensure the effect on introduction, the role of the construction manager, and the system, however, there is not an establish method to figure out how to program the structure of system on execution of the project by the owner.

     This paper, in the aim to figure out how to program appropriate system on execution the CM method, focused on Five essential elements which are derived from various study with the nature of type of CM method. And associates those elements, as example of the CM method utilized in the reconstruction projects for The Great East Japan Earthquake, with feature of the type of CM, then derive the theory of the program management in the construction project.

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  • Hitoshi NINOMIYA, Tsunemi WATANABE
    2019 Volume 75 Issue 2 Pages I_73-I_87
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     In recent years, while tax revenue decreases with population decline and social security costs increase with the aging of society, it becomes more difficult for the government alone to respond the needs of diversifying and sophisticated citizens. “Citizen Coproduction” where citizens and administration bring resources and work to solve local issues is regarded as important. However, each local government does not know what kind of program management can lead to “Citizen Coproduction”, and practices town development by trial and error. We attempted to propose a flexible design and management method for practicing “Citizen Coproduction” on community development in accordance with rapid changes in local communities and diverse needs. In order to verify the effectiveness of our method, we conducted workshops and social experiments in Bungo-Ohno City, Japan.

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  • Sosuke TERANO, Satoshi KOGANEMARU, Hiroshi MATSUDA, Hiroshi SASAKI, Ao ...
    2019 Volume 75 Issue 2 Pages I_88-I_95
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     Efforts to utilize ICT to maintain and manage social infrastructure such as roads, bridges and tunnels have been developed for several years, and road patrol (hereinafter referred to as "road pat") is one of the measures. This is a road management system that estimates degradation of roads using smartphones. It is aimed at lower cost and simplification of work than MCI, which is a road surface property evaluation that has been utilized until now. In this research, we use a composite image filter capable of collecting information on unevenness on roads and extracting damage on the road surface constructed by a previous research with an acceleration sensor built in a smartphone, we verified the validity of the crack rate.

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  • Kiichiro HATOYAMA, Masahiro WATANABE, Kazushi SANO, Takao TAKAHASHI
    2019 Volume 75 Issue 2 Pages I_96-I_104
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     While the bridge inspection in Japan is expected to be greatly improved in efficiency by future technological innovation, it is not clear how the efficiency improvement will influence on repair cost of bridges and will change the future bridge health distribution. In order to clarify this point, this study first analyzed actual tendencies of natural health deterioration due to the ages of the bridges, and tendency of increase of repair costs due to a decrease in health condition, using actual repair cost data of Niigata City. We also defined the probability that health condition is correctly determined according to the inspection accuracy, and made a management simulation model that outputs the distribution of the health conditions, with the inspection accuracy, inspection frequency, and repair budget as design variables. As a result of scenario analysis, under the current repair budget, inspection accuracy improvement does not lead to decrease in bridges with low health conditions, and expansion of repair budget and efficiency of inspection frequency may increase proportion of high health condition bridges.

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  • Fumi MIYAHARA, Toshiaki NANAZAWA
    2019 Volume 75 Issue 2 Pages I_105-I_119
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     Road structures including bridges are aging ever faster. As well as road bridges or road tunnels, periodic inspection for road sheds and road culverts have been carried out since 2014. Although it is useful for preparing medium and long term maintenance plan, analysis for deterioration characteristics of road sheds and road culverts have not been conducted.

     This research analyses deterioration characteristics of road sheds and road culverts using periodic inspection data by the visual inspection which the Ministry of Land, Infrastructure, transport and Tourism(MLIT) introduced since 2014, based on survival analysis which commonly used in the medical field and pharmaceutical field.

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  • Shin MIYAHARA, Noriaki NAKAMURA, Kenichi TSUKAHARA, Yuki AKIYAMA
    2019 Volume 75 Issue 2 Pages I_120-I_131
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     In a society with a declining population, the formulation of a location normalization plan has been underway in 400 cities nationwide from the standpoint of maintaining administrative efficiency and preventing disasters. In 154 cities of these cities, urban districts are being reduced and residential districts (hereinafter, “residential induction areas”) are being set up. This study focuses on sewage pipes that are considered to be an asset seriously affected by population decline among the already developed infrastructure assets in areas excluded from residential induction areas (hereinafter, "non-residential induction areas"). We verified, from the viewpoint of cost, whether alternative methods could be introduced into nonresidential induction areas instead of renewal by renovating sewage pipes, in cities where sewage pipes are already developed and residential induction areas are established.

     As a result, we found that, by promoting residential induction based on the location normalization plan, alternative methods were sometimes advantageous in non-residential induction areas where population decline is expected. It was shown there is a need to consider certain elements upon reviewing prefectural concepts relating to sewage treatment systems which are already formulated and also formulating medium- to long-term stock management plans for sewage systems.

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  • Masaaki AMMA
    2019 Volume 75 Issue 2 Pages I_132-I_149
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     While it is widely recognized that financial institutions, who provide non-recourse project financing for PPP projects, do play important roles in effectively scrutinizing the project bankability and provide financial disciplines to project developers in the implementation of those projects, such functions did not work in India. In general, they do not necessarily work well, depending upon the quality of banks’ appraisal capacility for PPPs, the relationship between banks and sponsors and the financial regulatory regime in host countries. This implies that governments need to align the policies for infrastructure development and PPPs with prudent financial sector policies so that they can design and implement PPP projects with feasibility and bankability.

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  • Keita NAKASU, Yuki MITSUTANI, Hiroki SHIMADA, Takashi WADA
    2019 Volume 75 Issue 2 Pages I_150-I_159
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     The purpose of this study is to propose implementation method of Public-Private-Partnership for Project Acceleration in large-scale disaster recovery and restoration projects by Ministry of Land, Infrastructure, Transport and Tourism (MLIT). The results of this study revealed the idea of work-sharing between MLIT in-house engineers and private engineers with cooperative partnership for project acceleration. Based on the proposed idea, different from existing methods such as construction management, the guideline on Public-Private-Partnership for Project Acceleration in MLIT was published in March, 2019.

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  • Shota IWAI, Keiichi KITAZUME, Hiroko SHIMIZU
    2019 Volume 75 Issue 2 Pages I_160-I_167
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     Since the Act on Promotion of Private Finance Initiatve enacted, PFI projects which utilize private finance and skills in infrastructure procurements have been increasing in Japan. To aim higher VFM(Value for Money) by the PFI project, more proposal by private componies should be required. However, because almost municipalities have few data about the facilities and infrastructures, private sectors can not make a valuable proposal. The purpose of this research is to make clear merits of collecting data which are attributes of users, needs of facilities, their WTP of them and so on and to find measures which encourage proposal by private companies in PFI. This research conducted interviews and questionnaire surveys in a PFI project in Kashiba city, one of Nara prefecture, and analyzed data to make clear the issues about data collecting and analysis.

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  • Hitoshi HORI, Tsunemi WATANABE
    2019 Volume 75 Issue 2 Pages I_168-I_184
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     After the great disaster in East Japan and it’s recovery process, CM operations which support the planning and ordering of the reconstruction of town and land are growing and spreading. In the author’s experience engaged in the reconstruction business as CM, author’s experience engaged in the reconstruction business as CM, the authors are enlightened that the human relationship between the orderer i.e. the self-governing body and CMR has greatly affected the CM business. In this study, we analyzed the motivation of CMR using the motivation theory (expectation theory and internal motivation) and discussed the business framework of CM.

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  • Miki MATSUMOTO, Seiya KINOSHITA, Toshiharu FUETA
    2019 Volume 75 Issue 2 Pages I_185-I_199
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     Collaboration between clients, construction, design and other technical service providers is vital to improving productivity and ensuring quality on public construction projects. Among the most important is to improve the management capability of government as a client. This study tries to define management skills necessary to be a client and consider measures to achieve the necessary buildup, by presenting results from the survey carried out in 2019 targeted at local government organizations. The survey revealed the need for staff training and other internal efforts as well as the use of outside resources for retaining management capability. To address these issues properly, qualification and assessment of the management capability proved to be important after careful thought about the scope of management.

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  • Tsunemi WATANABE, Hitoshi Ninomiya, Lingling WANG
    2019 Volume 75 Issue 2 Pages I_200-I_211
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     In this paper, we chose Otake-gumi, Sunago-gumi, and Kanasugi construction companies, local construction companies in Tokushima, Hokkaido, and Saitama, which realized improvement of business productivity and enhancement of work motivation of employees by introducing ICT actively in business. Reasons for the latter are studied. It is concluded that in three companies, (1) many employees have a high level of intrinsic motivation, (2) measures to improve autonomy, competence, and relatedness, three elements of intrinsic motivation, are imbedded as “corporation culture, ” 3) support chains for autonomy are functioning well, and (4) introduction of new technologies such as ICT plays a major role in improving the intrinsic motivation of employees. In doing so, all three companies are implementing appropriate but unique risk management.

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  • Kentaro SEKI, Masahide HORITA, Yuji KITAMI, Tomohiro IZAWA, Yasuaki SU ...
    2019 Volume 75 Issue 2 Pages I_212-I_224
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     The Ministry of Land, Infrastructure, Transport and Tourism introduced a unit price-type integration method and construction package-type integration method, which incorporates a bidding price reflecting the actual situation of construction, etc., and which is often used in Western countries. However, because it is not possible to confirm that a bidding price reflects the actual conditions of construction, the bidding price has not yet been taken into account.

     In this study, the degree of influence in the calculation criteria on the bidding price, given a situation where the actual situation of construction is not reflected in the bidding price was considered, and the degree of dependence on the bidder's orderer on the integration criteria being clarified and the structure. It was confirmed that the bidder estimating the orderer’s total and confirming the actual conditions under which the bidding price is formed and, securing the subcontracting company prior to bidding to determine the ratio depending on the standard for calculating the bidding price, led to reductions.

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  • Masahiro NISHIDA, Masahide HORITA
    2019 Volume 75 Issue 2 Pages I_225-I_237
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     Recently a new infrastructure maintenance contracting method which is called the provincial sustainable maintenance contracting was established because of the lack of operators of infrastructure maintenance. The contracting is characterized by the following: the public sector makes a comprehensive maintenance contract with a joint venture of the provincial construction firms.

     This study analyzed the contract prices in the provincial sustainable maintenance contracting in Mie and Gifu Prefectures with the multiple and panel regression in order to reveal whether the efficiency of the operations improved through the contracting. As a result, no effect of decreasing the contract prices was observed in either of two prefectures.

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  • Shinji YAMAGUCHI, Keishi TANIMOTO
    2019 Volume 75 Issue 2 Pages I_238-I_246
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     The construction industry in rural areas has been declined due to the labor shortage. If this tendency continues, the negative impact to the regional economy and local community may arise when the disaster which is beyond the business capability of the local industry to reconstruct occurs. However, it is not motivated to improve the capability immediately because the capability cannot be evaluated. This study aims to develop the method for evaluating the capability of the local construction industry using Gaussian mixture model and examine the usefulness of this method empirically.

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  • Shuhei OHTA, Tetsuji SATO
    2019 Volume 75 Issue 2 Pages I_247-I_255
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     In Japan, cutoff of roads between regions by natural disaster have sometimes occurred. In this paper, we developed a regional econometric model which is capable of evaluating time-series impacts of cutoff and restoration of arterial roads between regions on regional economy. The model considers the decrease in export as exogenous variables based on the assumption that cutoff of roads between regions decreases export. It can analyze the impact of cutoff of roads on regional potential productivity by decreasing the average working hour index and the rate of capital utilization index at the same rate as maximum decrease rate of import of raw materials. We also constructed the quarterly based empirical model for Wakayama Prefecture and simulated the impact of cutoff and timing of reopening of roads which connect with other cities on the regional economy assuming that Gobo City is isolated by cutoff of roads. As a result, it is indicated that the impact of cutoff of roads continues for a long time after reopening, early reopening alleviates the decrease in gross regional product by cutoff of roads for a long time, etc.

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  • Koreto INOUE, Masahide HORITA
    2019 Volume 75 Issue 2 Pages I_256-I_264
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     This study proposes a theoretical model for procuring materials with an incentive compatible quality level, price, and warranty period, which tackles the adverse selection and moral hazard problems. We have compared various warranty periods of materials having different failure characteristics defined by the Weibull distribution. The paper has concluded that a purchaser can procure the material without adverse selection or moral hazard, if the purchaser contracts an optimal warranty period with their supplier. However, the purchaser’s payoff depends on their capability of identifying quality levels.

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Special Issue(Report)
  • Kazuo TAKAHASHI, Hiroshi MATSUDA, Shozo NAKAMURA, Yuko YOSHIDA
    2019 Volume 75 Issue 2 Pages I_265-I_281
    Published: 2019
    Released on J-STAGE: February 28, 2020
    JOURNAL FREE ACCESS

     In 2008, Nagasaki University opened a MICHIMORI training course to nurture experts in the maintenance and management of roads ahead of the rest of the country. It is a collaborative consortium of construction industry, the university and local government. We develop human resources necessary for infrastructure maintenance management. Since 2008 Nagasaki University has conducted a MICHIMORI (road maintenance) training course to cultivate human resources in road maintenance management. A questionnaire survey among certified persons was held in 2015 immediately after registration as a private qualification with the Ministry of Land, Infrastructure, Transport and Tourism, at a time when they had not participated in public works. Thereafter they became involved in public works, an organization of certified persons was established, and a review of the method of implementing the training course was held.

     Based on the above, a questionnaire survey was held in September 2018 among MICHIMORI certified persons regarding activities as engineers and volunteers, activities in MICHIMORI training unit meetings, response to SIP infrastructure, the future of the MICHIMORI training course, new registration of private qualifications, personal evaluation and satisfaction by the certified persons, etc. In addition, a questionnaire survey was also conducted among the workplaces to which they were affiliated and the road administrators that deal with notification of problems on roads. This paper summarizes the results of these surveys, and discusses proposals for problem solving.

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