Analysis for vertical earth pressure transference on overlaying soils of shield tunnel under uniform surface surcharge

HUANG Da-wei; ZHOU Shun-hua; FENG Qing-song; LUO Kun; LEI Xiao-yan; XU You-jun

doi:10.16285/j.rsm.2018.0876

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Analysis for vertical earth pressure transference on overlaying soils of shield tunnel under uniform surface surcharge

更新时间：2026-06-25

- Analysis for vertical earth pressure transference on overlaying soils of shield tunnel under uniform surface surcharge
- Vol. 40, Issue 6, Pages: 2213-2220(2019)
- 作者机构：
  
  1. 华东交通大学铁路环境振动与噪声教育部工程研究中心,江西,南昌,330013
  2. 同济大学上海市轨道交通结构耐久与系统安全重点实验室,上海,201804
  3. 内蒙古科技大学土木工程学院,内蒙古,包头,014010
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2018.0876
  CLC： U25
- Online First：22 June 2019，
  
  Published：2019
- 稿件说明：
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HUANG Da-wei, ZHOU Shun-hua, FENG Qing-song, et al. Analysis for vertical earth pressure transference on overlaying soils of shield tunnel under uniform surface surcharge[J]. 2019, 40(6): 2213-2220.
DOI：

HUANG Da-wei, ZHOU Shun-hua, FENG Qing-song, et al. Analysis for vertical earth pressure transference on overlaying soils of shield tunnel under uniform surface surcharge[J]. 2019, 40(6): 2213-2220. DOI： 10.16285/j.rsm.2018.0876.

摘要

通过对地表均布超载的模型试验实测既有盾构隧道上覆土层竖向土压力、土体沉降进行分析，结果表明：地表均布超载作用下，与隧道顶部的垂直距离越近，隧道上覆土层中的竖向土压力分布不均匀程度越大，同时土体沉降的不均匀程度也越大。隧道上覆土层出现不均匀沉降时，土体单元之间发生竖向相对位移而产生竖向剪力，隧道上覆土中表现出竖向土压力转移现象，从而使隧道上覆土层中的竖向土压力分布不均匀。隧道上覆土层中土体单元之间的竖向剪力大小与单元之间的竖向相对位移及土体力学性能有关，因此，地表超载作用下隧道上覆土沉降的不均匀程度及上覆土的力学性能对隧道上覆土层的竖向土压力分布不均匀程度有影响，进而对隧道变形产生影响。

Abstract

Scaled model test for the influence on an existing shield tunnel induced by surface surcharge is carried out

and vertical earth pressure and soil settlement for the stratum above the shield tunnel are analyzed. Results show that under uniform surface surcharge

the less of the vertical distance from the top of the tunnel

the more extent for the nonuniform vertical earth pressure in the stratum above the shield tunnel

and the more extent for the nonuniform soil settlement of overlaying soils of the shield tunnel. The overlaying soils show vertical earth pressure transference for vertical shearing force among soil elements

which is induced by vertical relative movement among soil elements as the stratum above the shield tunnel has nonuniform soil settlement

so the vertical earth pressure in the stratum above the shield tunnel is nonuniform. As vertical shearing force among soil elements for overlaying soils is related to vertical relative movement among soil elements and soil mechanical property

the extent of nonuniform vertical earth pressure in the stratum above the shield tunnel is affected by the extent of nonuniform soil settlement and soil mechanical property of overlaying soils when the tunnel suffers from surface surcharge

so the tunnel deformation is influenced.

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