同一始发井内顶管双向顶进后背体系设计与施工技术

岩土与地下工程 > 2024年第53卷第19期

DOI: 10. 7672 / sgjs2024190086

同一始发井内顶管双向顶进后背体系设计与施工技术

作者：张兆军¹,彭焱锋¹,刘维正²,鲜斌琪¹,谭际鸣²,张毅¹

作者简介：

张兆军，正高级工程师， E⁃mail: 515340213@ qq. com

作者单位：

1.中铁隧道集团二处有限公司，河北三河 065201; 2.中南大学土木工程学院，湖南长沙 410075

基金项目：

∗湖南省建设科技计划（KY202108）；中铁隧道局集团科技创新计划（隧二研合 2020⁃08）

摘要：

针对地下管廊工程中进行两段及以上顶管作业的情况，基于南昌市丹霞路道路及综合管廊工程 EPC 项目顶管工程实例，对在同一始发井内同时进行双向顶管作业技术进行分析研究。建立数值计算模型，对相关结构体系受力进行分析，并结合有限元数值模拟的方法，对不同施工顺序下的受力特性进行对比。结果表明：在相同荷载下，顶推一侧两舱时后背墙受到的最大弯矩较对称顶进时大，后背体系结构在各工序下均满足受力与稳定性要求。揭示了在较大顶管始发井内采用肋板式后背墙作为背部支撑、通过钢套箱后靠背分配主顶油缸反力、同时设置双排双向后背体系方式的可行性。进一步提出后背墙结构的施工与拆除技术，并通过实际工程中后背墙变形监测验证了实施效果。

关键词：综合管廊；顶管；双向顶进；后背体系；数值模拟；监测

English：

According to the situation of two or more pipe jacking operations in the underground pipegallery project, based on the pipe jacking engineering example of the comprehensive pipe gallery EPCproject of Danxia Road in Nanchang, the technology of two⁃way pipe jacking operation in the sameoriginating well was analyzed and studied. A numerical calculation model was established to analyze thestress of the relevant structural system. Combined with the finite element numerical simulation method,the stress characteristics under different construction sequences were compared. The results show that:under the same load condition, the maximum bending moment of the back wall when pushing two pipeson one side is larger than that when pushing symmetrically. The back structure meets the requirements ofstress and stability in each engineering process. The feasibility of using rib type back wall as backsupport, distributing the reaction force of main jacking cylinder through the back of steel boxed box, andsetting double row and two⁃way back system in the large jacking launching well is verified. Theconstruction and demolition technology of the back wall structure is further proposed, and then verified bythe deformation monitoring of the back wall in the actual project.

[1]	丁猛猛。多排顶管矩形始发井的结构稳定性研究【D].合肥：安徽建筑大学，2021.DING M M. Research on structural stability of multi⁃row pipejacking rectangular launch well [ D ]. Hefei: Anhui JianzhuUniversity, 2021.
[2]	刘熙媛，张世华，高立康，等。枝江尾矿库排水工程圆形顶管工作井后背墙及土体的应力与位移特征分析【 J].隧道建设（中英文），2021,41（10）：1672⁃1681.LIU X Y, ZHANG S H, GAO L K, et al. Characteristic of stressand displacement of back wall and soil of circular working shaftfor pipe jacking in drainage project of Zhijiang end mine reservoir[J]. Tunnel construction, 2021, 41（10）： 1672⁃1681.
[3]	朱龙，徐震，白占伟，等。大顶力作用下圆形沉井后背土体受力变形特性分析【 J].上海交通大学学报，2014,48 （ 11）：1510⁃1516.ZHU L, XU Z, BAI Z W, et al. Behavior of resisting soil behinda circular caission well with large jacking force[ J]. Journal ofShanghai Jiaotong University, 2014,48（11）：1510⁃1516.
[4]	魏丽敏，向远华，陈果元，等。顶管工程工作井位移与土抗力分析【J].岩土力学，2009,30（8）：2397⁃2402.WEI L M, XIANG Y H, CHEN G Y, et al. Analysis ofdisplacement and soil counterforce for working well of pipejacking engineering [ J]. Rock and soil mechanics, 2009, 30（8）：2397⁃2402.
[5]	毛海和。顶管矩形工作井复合式后背墙反力分布研究【 J].岩土力学，2007（6）：1212⁃1216.MAO H H. Reaction distribution investigation and structuralanalysis of composite thrust wall of rectangular pipe jacking shaft[J]. Rock and soil mechanics, 2007（6）：1212⁃1216.
[6]	武永华。顶管施工时后背土体抗力理论计算【J].施工技术，2013,42（S2）：88⁃89.WU Y H. Calculation of soil resistance in the pipe jackingconstruction [ J ]. Construction technology, 2013, 42 （ S2 ）：88⁃89.
[7]	王宁，高毅，于少辉，等。矩形顶管隧道群施工对后背土体扰动规律的初步研究【 J].隧道建设（中英文），2019,39（ 3）：413⁃420.WANG N, GAO Y, YU S H, et al. Disturbance of rectangularpipe jacking tunnel group construction on soil behind workingshaft[J]. Tunnel construction, 2019,39（3）：413⁃420.
[8]	李汉愿。复杂环境下长距离大口径管道单基坑双向依次顶进施工技术【J].国防交通工程与技术，2020,18（3）：38⁃42.LI H Y. On the successive two⁃way jacking constructiontechniques for a long⁃distance, large⁃diameter pipeline of a singlefoundation pit in complex environment[J]. Traffic engineering &technology for national defence, 2020,18（3）：38⁃42.
[9]	卢斌，马永志，陈松，等。某河道整治项目长距离大直径顶管无中继间施工技术研究及应用【 J].广东水利水电，2020（8）：94⁃98.LU B, MA Y Z, CHEN S, et al. Research and application ofseamless construction technology of Pingshanhe undergroundstorage tank and water purification station[ J]. Guangdong waterresources and hydropower, 2020（8）：94⁃98.
[10]	M I PEERUN, D E L ONG, C DESHA. A strategic review onenhanced DEM simulation and advanced 3 - D particle printingtechniques to improve pipe⁃jacking force prediction [ J ].Tunnelling and underground space technology, 2022 （ 123 ）104415:1⁃16.

岩土与地下工程 > 2024年 第53卷 第19期