Experimental study of frictional resistance influences on tunnel face stability
Experimental study of frictional resistance influences on tunnel face stability
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摩擦阻力对掌子面稳定性影响的试验研究
DOI：
10.1088/1755-1315/1124/1/012103
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Osada M
中科院分区：
文献类型：
--
作者：
Kawanoue R;Yagihashi T;Togashi Y;Osada M
近年来，日本发生了多次因隧道挖掘而造成的地表塌陷。虽然此类事故是由开挖引起的地表松动和掌子面坍塌引起的，但由于掌子面稳定性问题十分复杂，且受支护形式和衬砌形式的影响较大，目前尚无公认的理论来评价掌子面的稳定性。城市新奥法在沉积岩地层较浅的情况下，松动面积较大。因此，有必要研究一种利用这种力学性质来定量评价隧道掌子面稳定性的方法。采用3种粒径的干石英砂和不同覆土量，通过二维隧道拉拔试验，研究了摩擦阻力对隧道掌子面破坏和松动面积的影响。结果表明，当抗剪角为46.4 °，覆盖层厚度与隧道高度比H/D大于5或抗剪角为55.8 °，覆盖层厚度与隧道高度比H/D大于3时，破坏区未到达地表。本研究认为，有一个拱效应取决于摩擦阻力和土壤覆盖发生。此外，即使覆土相同，抗剪强度越小，地表塌陷越早。因此，可以说摩擦阻力越高，塌陷进行得越晚。
In recent years, there have been several ground surface collapses due to tunnel excavation in Japan. Although such accident is caused by ground loosening and tunnel face collapses due to excavation, there is no accepted theory for estimating the face stability because this phenomenon is quite complicated and highly influenced by the supports and lining types. Specifically, the loosened area is relatively large for the urban NATM method, which applied in a shallow sedimentary rock layer. Therefore, a method to quantitatively evaluate the tunnel face stability by this kind of mechanical property is essential. In this study, 2D tunnel pull-out test was conducted to observe the influence of frictional resistance on tunnel face failure and loosening area by changing the shear resistance angle using three particle sizes of dry silica sand and different variation of earth covering. The result demonstrated that failure region doesn't reach the ground surface when the shear resistance angle is 46.4 and covering thickness to tunnel height ratio H/D is over 5 or the angle is 55.8 and H/D is over 3. This study considered that there is an arch effect depending on frictional resistance and earth coverings occurred. Furthermore, even with the same earth covering, the smaller the shear resistance is, the earlier the ground surface collapses. Therefore, it could be said that the higher the frictional resistance is, the later the collapse proceeds.
环切法开挖对地面位移及掌子面稳定性的影响
DOI：
10.11532/journalte2004.17.1
发表时间：
2007
期刊：
--
影响因子：
--
作者：
M. Hisatake;S. Ohno;T. Katayama;Yukihiro Ohmae
通讯作者：
Yukihiro Ohmae
松散砂层隧道掌子面稳定性标准判定的提出
DOI：
10.2208/jscej.1987.382_245
发表时间：
1987
期刊：
Doboku Gakkai Ronbunshu
影响因子：
--
作者：
T. Kurata;T. Miyamoto
通讯作者：
T. Miyamoto
含粘土层砂地层隧道掌子面稳定性评价
DOI：
10.2208/jscej.2000.659_51
发表时间：
2000
期刊：
Doboku Gakkai Ronbunshu
影响因子：
--
作者：
S. Konishi;T. Asakura;T. Tamura;Tetsuya Tsuji
通讯作者：
Tetsuya Tsuji