Research on distribution of initial excess pore water pressure due to shield tunnelling

WEI Xin-jiang; CHEN Wei-jun; WEI Gang; HONG Jie

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Research on distribution of initial excess pore water pressure due to shield tunnelling

更新时间：2026-06-25

- Research on distribution of initial excess pore water pressure due to shield tunnelling
- Vol. 33, Issue 7, (2012)
- 作者机构：
  
  1. 浙江大学建筑工程学院,杭州,310058
  2. 浙江大学城市学院土木工程系,杭州,310015
- 作者简介：
- 基金信息：
- DOI：
  CLC： U455
- Online First：13 July 2012，
  
  Published：2012
- 稿件说明：
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WEI Xin-jiang, CHEN Wei-jun, WEI Gang, et al. Research on distribution of initial excess pore water pressure due to shield tunnelling[J]. 2012, 33(7).
DOI：

WEI Xin-jiang, CHEN Wei-jun, WEI Gang, et al. Research on distribution of initial excess pore water pressure due to shield tunnelling[J]. 2012, 33(7). DOI：

摘要

盾构施工会对周围土体产生扰动，形成超孔隙水压力，引起工后固结沉降。运用应力释放理论推导与衬砌相邻的土体初始超孔隙水压力计算公式。假定扰动范围边界呈圆弧状，确定初始超孔隙水压力的分布范围；同时运用应力传递理论，推导分布范围内任一点土体的初始超孔隙水压力计算公式。通过对实测资料的分析可知，计算值与实测值吻合较好。算例分析表明，与衬砌相邻的土体初始超孔隙水压力呈近似圆形（顶部小、底部大）；随着到衬砌的径向距离增加，土体初始超孔隙水压力呈凹曲线形状；隧道底部的等值线最密，即变化最快；隧道顶部上方土体、不同深度处土体初始超孔隙水压力，以隧道轴线处为最大，呈现类似Peck曲线形状。

Abstract

Excess pore water pressure is generated during shield tunnelling

resulting in consolidation settlement. Assuming the disturbance range shape of shield tunnelling is circular arc

the distribution range of excess pore water pressure is determined. The formula of initial excess pore water pressure of soil around tunnel lining is deduced by stress relief theory; and the formula of initial excess pore water pressure of soil within the region of its distribution at any point is subsequently deduced by stress transfer theory. By comparing calculated and measured data

it is shown that they are in good agreement. Based on practical example

a conclusion is drawn that the distribution shape of initial excess pore water pressure of soil around shield tunnel circle is roughly circular (top of small

bottom of large). With the increase of distance from shield tunnel central axis

the initial excess pore water pressure of soil shows a concave curve shape. At the same time

the isopleths at the bottom of shield tunnel changes fastest. Above the top of the tunnel

the initial excess pore water pressure of soil gets the maximum at the tunnel axis in different depths

showing a similar Peck shape.

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