Experimental studies on unloading deformation properties of silty clay of first marine layer in Tianjin urban area

ZHENG Gang; YAN Zhi-xiong; LEI Hua-yang; WANG Pei

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Experimental studies on unloading deformation properties of silty clay of first marine layer in Tianjin urban area

更新时间：2026-06-25

- Experimental studies on unloading deformation properties of silty clay of first marine layer in Tianjin urban area
- Vol. 29, Issue 5, (2008)
- 作者机构：
  
  1. 天津大学,天津,300072
  2. 天津城建学院,天津,300384
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU433
- Online First：24 July 2013，
  
  Published：2008
- 稿件说明：
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ZHENG Gang, YAN Zhi-xiong, LEI Hua-yang, et al. Experimental studies on unloading deformation properties of silty clay of first marine layer in Tianjin urban area[J]. 2008, 29(5).
DOI：

ZHENG Gang, YAN Zhi-xiong, LEI Hua-yang, et al. Experimental studies on unloading deformation properties of silty clay of first marine layer in Tianjin urban area[J]. 2008, 29(5). DOI：

摘要

通过对天津市区地层中第一海相层底部的粉质黏土原状饱和试样进行的一系列K0固结不排水三轴卸荷试验，研究土体卸荷路径下的变形特性。试验表明，该种土在卸荷条件下应力-应变曲线可用双曲线形式模拟，而且存在比较明显的归一化性状，其初始切线卸荷模量与固结围压成正比。研究成果对天津市区基坑开挖及支护结构设计计算、软土隧道施工研究及其他相关岩土工程问题的研究均有较大的实用价值。

Abstract

With the improved triaxial equipment

a series of K0 consolidation and undrained shear tests have been carried out to study the unloading deformation properties of a typical soil in Tianjin urban area. According to the experimental results

the stress-strain curve is a hyperbola and has obvious normalization character. The initial tangent modulus obtained is directly proportional to the initial confining pressure.

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