胀缩性土质隧道建设期变形破坏特点及原因分析  

Analysis of Deformation Characteristics and Causes on an Expansive Soil Tunnel of Construction Period

作　　者：徐钦健[1] 

机构地区：[1]交通运输部科学研究院交通工程检测中心,北京市100013

出　　处：《北方交通》2015年第5期110-115,共6页Northern Communications

摘　　要：胀缩性土是自然地质过程中形成的一种多裂隙并具有显著吸水膨胀和失水收缩变形特性的高液限黏土。针对建设期、运营期隧道变形病害已有较多研究,但是对胀缩性土质隧道建设期变形破坏特点及原因的分析相对较少。采用现场监测与统计分析的方法,研究了山西某胀缩性土质隧道建设期支护结构变形破坏的全过程,重点总结了隧道内变形破坏方式及主要特点,提出了变形破坏的产生原因,对今后类似项目的施工提供了安全性参考和借鉴意义。Expansion soil is a kind of high liquid limit clay with multi - fractured swelling and dehydration shrinkage deformation properties. Deformations diseases of constructing and operating period have been studied for long time, but the analysis of deformation characteristics and causes on an expansive soil tunnel are of a little. The whole process of construction of the supporting structure deformations and failures are studied by means of statistical analysis and site monitoring. The main features of deformation, failure mode and the deformation causes are proposed, which are of practical significance for reference value and practical significance for similar projects.

关 键 词：胀缩性土质隧道 建设期 变形破坏特点 原因分析 

分 类 号：U455[建筑科学—桥梁与隧道工程]