This paper refers the case project of the running tunnel from grand theater to science museum in shenzhen metro , through fem numerical simulation , researches the ground surface settlement and influence on the underground pipeline in soft stratum abundant with water by the technique of horizontal jet grouting 本文以深圳地鐵一期工程大劇院科學館區(qū)間中的近接雙孔隧道工程為背景,對在富水軟弱地層中應用水平旋噴樁工藝進行控制降水施工時對地表沉降及地下管線的影響進行了研究。
In order to achieve the optimized tunneling approach , first , tunneling procedures , shift length , horizontal jet grouting length , bench length and space length between c and d part of crd method are optimized ; on the basis of these results , two kinds of tunneling schemes are calculated with three - dimensional fem and the optimized tunneling scheme is achieved . as results of the optimized scheme , the conclusion is made that the gas pipe above the tunnel of sk3 + 355 section is secure . the calculation results are verified through comparison of numerical simulation results and site - monitoring measurement data 為得出適合本段工程的最佳施工路線,利用大型有限元通用軟件ansys對開挖順序、開挖進尺、水平旋噴長度、臺階長度及crd工法施工的c 、 d部相錯長度進行了有限元數(shù)值模擬和優(yōu)化分析,并利用這些分析結果,進行了兩個施工方案的三維有限元動態(tài)施工模擬,得出了較優(yōu)的施工方案,并利用施工后的地表沉降槽曲線,對sk3 + 355斷面處隧道上方的煤氣管線的安全性進行了分析,得出了利用此施工方案施工不會造成此處煤氣管線破壞的結論。