箱涵顶进置换管幕工法土体变形分布式光纤监测研究  

Distributed optic fiber sensors for soil deformation monitoring for construction method of box culverts being pushed to replace pipe roofs

作　　者：赵洪岩[1] 张勇[1,2] 陈峰军 顾凯[1] 张正 魏广庆 施斌[1] 

机构地区：[1]南京大学地球科学与工程学院,光电传感工程监测中心,江苏南京210093 [2]山东电力工程咨询院有限公司,山东济南250013 [3]上海建工(集团)总公司,上海200080 [4]苏州南智传感科技有限公司,江苏苏州215123

出　　处：《岩土工程学报》2012年第7期1355-1360,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家863计划资助项目(2007AA11Z111);国家重点基础研究发展计划(973计划)(2011CB710605)

摘　　要：箱涵顶进置换管幕工法是中国新创的城市隧道暗挖方法,施工过程中土体变形情况是检验施工工法成功的关键。针对箱涵顶进置换管幕工法的模型试验过程,设计了基于BOTDR分布式光纤传感技术的土体变形传感器并在室内进行了性能测试,同时根据该工法的施工特点建立了三维变形监测网络。在试验结果和监测数据的基础上,分析了工具管幕推进和箱涵置换工具管幕过程中土体的变形特性,验证了该技术的可行性。试验研究成果对于分布式光纤土体变形监测和完善该施工工法的智能监测系统具有重要意义。The construction method of a box culvert being pushed to replace two pipe roofs is initiated as a city tunnel excavation method in China. This method is complex, and soil deformation is the key factor to test whether the construction method is successful or not and to guarantee the tunnel safety. The soil deformation sensors are introduced based on the distributed fiber sensing technology, their performances are tested in the laboratory, and a three-dimensional deformation monitoring network is designed according to the model tests. The test results and the monitoring data are analyzed. The soil deformation characteristics during the pipe-roofs pushing and box culvert replacement are summarized. This study will play an important role in perfecting the intelligent monitoring system, improving this construction method and analyzing the deformation of engineering soils.

关 键 词：BOTDR 土体变形 箱涵 管幕 分布式监测 隧道 

分 类 号：TU433[建筑科学—岩土工程]