PROCEEDINGS OF TUNNEL ENGINEERING, JSCE
Online ISSN : 1884-9091
ISSN-L : 1345-0832
Volume 4
Showing 51-69 articles out of 69 articles from the selected issue
  • Yuji TAKAHASHI, Kiyoshi OHNO, Seiji MORIKAWA, Takashi HUKUOKA
    1994 Volume 4 Pages 353-358
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    One of the purposes of tunnnel excavation analysis is to investigate stability of tunnel faces. For precise investigation of the stability, three dimensional analysis is required, but it is complicated and time consuming work. In this paper, two dimensional analysis of a vertical section along a tunnel axis is performed and the effects of forepiles are studied. The results of the analysis indicate that forepiles reduce area of failure zone and tunnel crown settlements.
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  • Tatsuo Okazawa, Yoshihiro Mishima, Hideaki Kuramochi, Kunihiko Ito, Sh ...
    1994 Volume 4 Pages 359-364
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    The excavation of Maiko Tunnel South Section must be performed under a combination of adverse conditions including large cross section, uncemented ground, urban site, shallow depth of cover, and a binocular tunnel.
    As it is of greatest consern to minimize the settlement of surface structures, the excavation of the large cross section tunnel is being achieved after the execution of long forepoles installing a series of steel pipes in an arch like “umbrella” shape.
    The authors, so as to grope for a better construction method to minimize surface settlements, studied on ground deformation control methods by three dimensional finite element method.
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  • Masayuki USHIMA, Takafumi HARA
    1994 Volume 4 Pages 365-370
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    Collapse of the cutting face and displacement by the shortage of the bearing capacity are main problems in the nucousolidated pumice ground tunnel drive.
    Pre-lining method and other measures have been applied in order to overcome these prpblems. The results are as follows.
    1. The cutting face was stable due to the umbrella of the pre-lining, which is to cast the mortar liner in the shape of arched shell in front of the face prior to to the excavation.
    2. The displacement of the tunnelwas effective restricted by the injection type foot-piles, reinforcement concrete at the leg of the heading etc.
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  • Yoshifumi TAGUCHI, Masao SAGARA, Mitsutaka HADA, Kazuo KAGAWA
    1994 Volume 4 Pages 371-376
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    It is expected to develop the reliable reinforced method to decrease the surface settlement on the shallow tunnel in urban resion. A new pre-lining method which can make the continuous arched body on the top of the face has been developed. It makes a reverse T type body by using the high pressure grouting with three direction nozzle.
    The reverse T type body is not only economical shape but also effective function in a complex with the ground. The three dimensional model test chaging the shape of the reinforcement was carried out to investigate the effect of this pre-lining method. This paper describes the result of the model test.
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  • Yasuo KAWABATA, Tadashi INOMATA, Kensaku ICHIKAWA, Satoru OMORI, Takao ...
    1994 Volume 4 Pages 377-382
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    TOM-JET system is forepiling method applicable for various grounds. It is constructs continuous piles by jet grouting using an usual jumbo drifter for tunneling, and improves the ground before the excavation.
    Piles strength is influenced by grounds, because piles consist of ground material and grouting material.
    This report describes the followings;
    (1) Estimation of the required strength of piles.
    (2) Mixture method of grouting materials suited to grounds.
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  • Iwao TSURUDA, Kazumi YOSHIHARA, Shoutarou TATSUMI
    1994 Volume 4 Pages 383-388
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    Takagawa Tunnel is is port of Yamanasi Maglev Test Line. The length of this tunnel is approximately 3, 960m.
    KOFU side of this tunnel has characteristics that tunnel over-burden is approximately 5m to 20m and ground conditions consist of loose soil.
    This document is being described regarding KOFU side of This Tunnel, where this is the smollest tunnel over-burden of This Tunnel and this location was curried out Protection Work for the Building By Vertical Anchor Method.
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  • Takeru ARIIZUMI, Tatsuya TOMIDOKORO, Hiroshi MATSUNAGA, Kouji KENKYO
    1994 Volume 4 Pages 389-394
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    Jet grouting was applied in the diluvial sandy deposit with high artesian head, as an improving measure on constructing the electric transmission line tunnel in a maner of New Austrian Tunneling Method. The authors have made an analysis based on 2-dimension finite element method for zoning the improvement. The paper mainly refers to the results that the analysis clarifies the plastic zone and the targeted zone to be improved as well. The set-up of larger diameter in an improved soil column than ever has enabled us to expect a shorter period and the cost-effctiveness of the construction accordingly.
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  • Makoto KITOH, Mitsuhiro SUENAGA, Toshio TOSAKA, Yoshiaki HIRONAKA, Mas ...
    1994 Volume 4 Pages 395-400
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    This report describes the result observed during the practical application of shotcrete including silicafume in the Gorigamine tuunel.The experiment is designed so as to confirm the workability and quality of the shotcrete composite with silicafume, which has been already confirmed in laboratory test by the authors. According to the examination, it is observed that the shotcrete including silicafume has following characteristics; the range of slump to reduce the quantity and rebound ratio is comparatively wider than that of conventional shotcrete;the existence of minute particles of fine aggregate is effective to improve the construction performance of the shotcrete.
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  • Shigetomo SATO, Yokio ITO, Masaru ICHIJO
    1994 Volume 4 Pages 401-406
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    The geological condition of the Ichinohe contract section in Iwate Tunnel is affect -ed by tuff containing montmorillonite which has strong swelling tendency and a gene-rally low degree of solidity making this the most geologically difficult contract section.
    This paper will report on the various construction measures which were performed in all stages of tunnel construction from excavation to lining in swelling ground with convergence exceeding 800mm.
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  • Hitoshi SUZUKI, Yasuhiro TANAKA, Yoshiaki ISHIDA, Tadayuki KOBAYAKAWA
    1994 Volume 4 Pages 407-410
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    The total blasting system “DMEC” is the system to provide accurate locations of drill holes with laser beams. The database of past performance including hole numbers, drill hole length, explosive charge etc., is used in this system to design the optimum blasting pattern suiting various geological features and tunnel sections. The design result is transferred to the laser marking system and the drill hole locations are lit up continuously on the tunnel face with laser beam.
    The system significantly contributes to the reduction of overexcavation, the saving of manual work and the improvement of safety on site.
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  • Masaaki TAKENO, Masanori OKAMURA
    1994 Volume 4 Pages 411-416
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    Higasiyama tunnel is a subway tunnel of mountain type in the urban area over a total length of 1, 567.5m. And its structure is featured by paralles of single track at different elevations for a span of 495m on the starting side and by a double track for the rest 1, 072.5m portion. We report the results of Urban NATM that excavated the subway tunnels covered with slight thickness of earth right under Keishin-Line and a prefectual road. And also we made an exact survey at any time to keep the safety on the ground.
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  • Tetsuo NAGAI, Jian-Sheng SUN, Shogo KUNIMURA, Takeshi IKEJIRI
    1994 Volume 4 Pages 417-422
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    Pull-out test is available to control the quality of installed rockbolt. In the case of tunnel excavation, in Japan, firstly pull-out force is applied to a grouted rockbolt until 10tonf, secondly engineers evaluate the performance of the rockbolt reinforcement system on the basis of the linearity of its load-displacement curve. However, there are a number of causes which can seriously affect pull-out test results, so that it is not easy to make an accurate evaluation. In this paper, the authors propose a control method, which is capable of evaluating the performance of the rockbolt system, based on the concept of “pull-out gradient” and demonstrate its applicability from mechanical point of view.
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  • Kazuhiro YASUI, Hisao TAMURA
    1994 Volume 4 Pages 423-428
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    single-track railway tunnel with old brick lining. The work was to install the new lining instead of the brick lining after increasing the height of the cross section by 80cm was performed during 270 minutes of the train service interval at night.
    The ground around the tunnel was loose terrace deposit with high water content, Furthermore the new lining had to be the final support. The authors used an improved load header for smooth excavation and introduced “A NEW Support System”, which consisted of steel rib with hight-performance precast concrete plate and thixotropical special light weight mortar as backfill material.
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  • Masanobu SAKAMOTO, Kazuhiko YAMAMOTO, Wataru SHIDA, Syuuji YAGI
    1994 Volume 4 Pages 429-434
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    This report is written to show several cases on repair of old underground water tunnels using P. I. C.(Polymer Impregnated Concrete) board. P. I. C. board is a permanent from which is high density and strength and gives higher durability for concrete structures.
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  • Kesao TOMIZAWA, Tomoharu OZAWA, Kazumi ISHIKURA, Kazutoshi ABE, Kouji ...
    1994 Volume 4 Pages 435-438
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    In this paper, we propose a theoretical method, the employing the fuzzy structural modeling (FSM), which can be used to find out how important the leakage resources. To examine the applicicability the method, pick up Yubiso tunnel as a study area hierachical structure of leakage resources making up the waterproofing technology of tunnel obtained by the above mentioned method can contribute to working out a tunnel specific plan.
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  • Koji ISHIYAMA, Akiyoshi TSUCHIYA, Keiji CHIDA, Yasuo NAKAMURA
    1994 Volume 4 Pages 439-444
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    It is important to predict the ground phase boundaries ahead of tunnel-face in the improvement of safety and economical construction. A new in-tunnel seismic survey, THSP system, was proposed. This system is considered to have a exploration range up to several hundred meters and a good resolution independent of rock type. This system can be used during face advance. This paper discuss a field examination using the new system to come in practice. Not only THSP system but also TSP system, which is used in-tunnel seismic survey designed by Dr.Sattel, at the same place in Asara Tunnel were discussed.
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  • Haruhiko NISHINO, Matsuo YAMAMOTO, Sin-ichi OMAE, Hajime HIEDA, Yasuo ...
    1994 Volume 4 Pages 445-448
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    In-situ test for predicting ahead of the tunnel face was carried out using TSP (Tunnel Seismic Prediction) system;the products of the Amberg Measuring Technique Ltd in Switzerland.
    The TSP system has been succesfully utilized for predicting ahead of the tunnel face in Europe. We have been verifing the applicability of the system to the complicated geological situations in Japan. The predicted condition were very much in agreement with the rock mass actually exposed by the excavation. As a result, in-situ test has revaled that TSP system was very useful for Japanese tunnels.
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  • Kiyoshi OHNO, Susumu HIRONO, Hisao HAYASHI, Tsuyoshi HARAGUCHI, Yasuo ...
    1994 Volume 4 Pages 449-454
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    The authors applied tunnel horizontal seismic profiling system to the fractured zone with water-flow. The geology of test tunnel are slate, chert, basalt, and alternation of these rocks. There are many irregular fractures, small blocks, and joints with white-clay in the fault. The face of tunnel is extremely unstable. We setted many sensors at the side-wall of both main tunnel and pilot tunnel, and had carried out seismic records to evaluate more extensive geological structure. The distance for the fault of the zone surrounding and ahead the face was detected by reflection method.
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  • Hiroshi KIKUCHI, Hiroshi KATOU, Keizou MUKAIDA, Masayuki SUZUKI, Shige ...
    1994 Volume 4 Pages 455-460
    Published: November 16, 1994
    Released: June 27, 2011
    JOURNALS FREE ACCESS
    This report is describing about the applicability of the Micro Gravity Survey Method for investigating abandoned mines, and about results of adopting tunnel stability measures for the Akita Highway's Sennin Tunnel Prject. The tunnel consists of a main tunnel (L=2, 503m, A=87m2) and an evacuation tunnel (L=2, 503m, A=18m2). Geological structure of the tunnels consisted of relatively hard rocks such as hard tuf, andesite, and tuffbrecia.
    The NATM short bench cut and the NATM full face method using cut and blast were employed for excavating each tunnel. When the tunnel excavation reached around 580 meters from the entrance, large unexpect cavern emerged after small collapse of the cutting face. a result of detailed survey, the cavern was proven to be an abandoned mine. The Micro Gravity Survey Method was employed for investigating the cavern because the method was desirable for investigating wide space, and did not require test boring.
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