椒花水库顶管掘进施工中的反力架设计  

Design of Reaction Frame in the Jacking Construction of the Top Pipe of Jiaohua Reservoir

作　　者：崔海涛[1] 王伟[1] 陈敬涛 CUI Haitao;WANG Wei;CHEN Jingtao(China Water Resources Beifang Investigation Design and Research Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《水利与建筑工程学报》2024年第6期91-97,148,共8页Journal of Water Resources and Architectural Engineering

摘　　要：以椒花水库供水工程江湾隧洞顶管掘进施工为背景,依据工程的实际工况,探究浆砌石反力墙和钢结构组合反力架方案的可行性,并采用SAP2000软件进行应力模拟计算,结果表明:钢结构组合反力架结构抗滑稳定安全系数为3.38,浆砌石反力墙抗滑稳定安全系数为3.04,均大于反力架允许安全系数3.0,满足稳定性要求,钢结构组合反力架结构的最大拉应力和最大压应力分别为318.34 MPa和207.61 MPa,应力验算结果满足Q345的安全性能要求,结构的最大变形(6.75 mm)小于允许最大挠度(9.18 mm),而浆砌石反力墙的最大拉应力和最大压应力也能满足形变要求。浆砌石反力墙和反力架方案的抗滑稳定均满足顶管掘进机的反力要求,但浆砌石反力墙人工砌筑工期长,而反力架方案施工迅速且组合简单,因此,钢结构组合反力架方案更优。This study examines the feasibility of a combined counterforce wall and steel structure counterforce frame for the jacking pipe construction of the Jiaohua Reservoir water supply project,based on the project's actual working conditions.Stress simulations were conducted using SAP2000 software.The results indicate that both the masonry counterforce wall and the counterforce frame system satisfy the counterforce requirements for the jacking machine in terms of sliding stability.However,while the masonry counterforce wall requires a lengthy manual construction process,the counterforce frame system offers a more efficient construction timeline and simplified assembly.Consequently,the steel structure combined counterforce frame system is considered superior.The sliding stability safety factor of the structure is 3.38,exceeding the allowable safety factor of 3.0,thus ensuring stability.The maximum tensile stress and compressive stress of the structure are 318.34 MPa and 207.61 MPa,respectively,and the stress analysis results meet the safety performance requirements for Q345 steel.Furthermore,the maximum deformation(6.75 mm)is well within the allowable deflection limit of 9.18 mm,thereby satisfying deformation criteria.Overall,the steel structure combined counterforce frame system demonstrates robust technical feasibility.

关 键 词：隧洞 岩石顶管掘进技术 顶推力 反力架 双碳 

分 类 号：TV554[水利工程—水利水电工程]