地裂缝作用下管廊结构底部脱空范围计算方法  

Calculation method of void area at the bottom of utility tunnel structure crossing ground fissures

作　　者：邓博团[1] 田江涛 苏三庆[2] 李鑫[1] 李攀 王劲 DENG Botuan;TIAN Jiangtao;SU Sanqing;LI Xin;LI Pan;WANG Jing(School of Architecture and Civil Engineering,Xi′an University of Science and Technology,Xi′an 710054,China;School of Civil Engineering,Xi′an Univ.of Arch.&Tech.,Xi′an 710055,China;Xi′an Changqing Technology Engineering Co.,Ltd,Xi′an 710000,China)

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]西安长庆科技工程有限责任公司,陕西西安710000

出　　处：《西安建筑科技大学学报（自然科学版）》2021年第2期173-177,185,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(41702346);陕西省科技计划项目(2019SF-264);陕西省教育厅专项科研计划项目(16JK1513)。

摘　　要：弹性地基梁法是计算地下结构的常用方法,但是在地裂缝活动下管廊结构底部产生脱空,弹性地基梁法的使用条件不再适用.基于Euler-Bernoulli-Bousslnesq模型和链杆法,将管廊与地基的接触看作是无穷多次超静定结构,通过将无穷多次超静定结构转化为有限次超静定结构,建立管廊结构在地裂缝作用下底部脱空的计算模型,由管廊结构与地基接触部分相对位移为零的条件,给出了管廊结构底部脱空范围的计算方法,并与既有地裂缝作用下管廊模型试验结果进行对比验证,由对比分析结果可知,管廊底部脱空范围计算方法所得结果与模型试验结果基本一致,最大误差不超过-18.75%,表明管廊底部脱空范围计算方法具有一定的适用性和有效性,可为地裂缝区域的管廊结构设计提供一些参考借鉴.The elastic foundation beam theory is a frequently used method of calculating the underground structure.However,when the void is occurred at the bottom of the utility tunnel crossing ground fissures,the using conditions of the elastic foundation beam theory are not applicable.Based on the Euler Bernoulli-bousslslnesq model and the chain-bar method,the contact between the utility tunnel and the foundation is regarded as an infinitely multiple statically indeterminate structure.By transforming the infinitely multiple statically indeterminate structure into a finite order statically indeterminate structure,the calculation model of void at the bottom of the utility tunnel structure crossing ground fissures is established.According to the condition that the relative displacement between the utility tunnel structure and the foundation is zero,the calculation method of the void area at the bottom of the utility tunnel structure is given.At the same time,By comparing with the existing model test results of the utility tunnel,the results show that the calculation method of the void area at the bottom of the utility tunnel is basically consistent with the model test results,and the maximum error is not more than-18.75%.It shows that the calculation method of the void area at the bottom of the utility tunnel has certain applicability and effectiveness,and can be provided some reference for the structure design of utility tunnel in the ground fissure area.

关 键 词：地裂缝 管廊结构 Euler-Bernoulli-Bousslnesq模型 链杆法 脱空范围 计算方法 

分 类 号：TU431[建筑科学—岩土工程]