盾构隧道围岩压力分布规律及作用模式

doi:10.19952/j.cnki.2096-5052.2022.04.05

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摘要目前我国的盾构隧道结构设计中围岩压力取值多采用土柱法或太沙基公式，此类公式在新奥法隧道中有较好应用，但是其对盾构隧道围岩压力计算的适用性还有待进一步研究。通过对比23处盾构法隧道与44处新奥法隧道围岩压力的现场测试统计数据，研究盾构隧道围岩压力与埋深、洞径、地层类别之间的联系，分析了盾构隧道围岩压力与新奥法隧道围岩压力之间的区别，进一步厘清了盾构法隧道围岩压力的特性。通过计算分析，探讨各围岩压力计算公式对盾构法隧道的适用性。分析发现：盾构隧道围岩压力表现出围岩压力随埋深增大的规律，且黄土与粉质黏土地层隧道的围岩压力明显小于含有砂性土的地层。新奥法隧道的围岩压力随埋深及开挖洞径的增加，呈现出较为明显的增大趋势。盾构法与新奥法隧道围岩压力差异较大，受盾构法衬砌支护更为及时的影响，盾构隧道的围岩压力明显大于新奥法隧道，围岩压力沿洞周的分布也更加均匀，盾构隧道的围岩压力更倾向属于形变压力。

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关键词: 隧道工程盾构隧道围岩压力作用模式现场测试统计

Abstract: The value of surrounding rock pressure for the design of shield tunnels in China mostly adopts the soil column method or the Terzaghi formula at present. Such formula has good application in the New Austria Tunnelling Method（NATM）tunnel, but its applicability to the calculation of surrounding rock pressure of shield tunnel needs further study. By comparing the field test statistics of the surrounding rock pressure of 23 shield tunnels and 44 NATM tunnels, the relationship between the surrounding rock pressure of shield tunnels and the buried depth, tunnel diameter and stratum type was studied. The difference between the surrounding rock pressure of shield tunnels and the NATM tunnels is analyzed, and the characteristics of the surrounding rock pressure of shield tunnels were further clarified. The applicability of each surrounding rock pressure calculation formula to the shield tunnel was discussed through calculation and analysis. It was found that the surrounding rock pressure of the shield tunnel increased with the buried depth, and the surrounding rock pressure of tunnels in loess and silty clay stratum was obviously less than that in stratum containing sandy soil. The surrounding rock pressure of NATM Tunnel showed an obvious increasing trend with the increase of buried depth and excavation hole diameter. The surrounding rock pressure of the shield tunnel and NATM tunnel was quite different. Due to the timelier lining support of the shield tunnel, the surrounding rock pressure of the shield tunnel was significantly higher than that of the NATM tunnel, and the distribution of surrounding rock pressure along the tunnel perimeter was more uniform. The surrounding rock pressure of the shield tunnel was more inclined to belong to deformation pressure.

Key words: tunnel engineering shield tunnel surrounding rock pressure mode of action field test statistics

收稿日期: 2022-03-21 修回日期: 2022-04-20 发布日期: 2022-04-20

中图分类号:

U451.4

基金资助:

国家自然科学基金青年资助项目（52108360）；云南省交通运输厅资助项目（云交科教便[2019]59号）;中国博士后科学基金资助项目（2020M683398）

通讯作者: 叶飞（1977—），男，陕西石泉人，博士，教授，博士生导师，主要研究方向为隧道及地下结构安全。 E-mail: xianyefei@126.com

作者简介: 韩兴博（1991—），男，陕西岐山人，博士，讲师，主要研究方向为盾构隧道围岩-结构力学响应。E-mail: xingbo.han@chd.edu.cn.

引用本文:

韩兴博, 陈子明, 苏恩杰, 梁晓明, 宋桂峰, 叶飞. 盾构隧道围岩压力分布规律及作用模式[J]. 隧道与地下工程灾害防治, 10.19952/j.cnki.2096-5052.2022.04.05.
HAN Xingbo, CHEN Ziming, SU Enjie, LIANG Xiaoming, SONG Guifeng, YE Fei. Preliminary study on the distribution law and action mode of surrounding rock pressure of shield tunnel. Hazard Control in Tunnelling and Underground Engineering, 0, (): 1-.

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