华北水利水电大学学报（自然科学版）2025，Vol.46Issue(2)：92-101,10.DOI:10.19760/j.ncwu.zk.2025027
复合地层超大矩形顶管隧道下穿高铁施工加固技术
Reinforcement Technology for Super-large Rectangular Pipe Jacking Tunnels Underpassing High-speed Railways in Composite Strata
摘要
Abstract
To ensure the construction safety of a large rectangular pipe jacking tunnel in composite strata undercrossing an ex-isting high-speed railway,this study investigates safety and reinforcement technologies through numerical simulations and field monitoring,taking the Hangzhou-Shenzhen high-speed railway undercrossing project as an engineering case.The results dem-onstrate that:① Unreinforced construction induces excessive track settlement exceeding safety thresholds when the large rec-tangular pipe jacking tunnel traverses composite strata beneath the railway;② Three reinforcement schemes are applicable for strata with a hard rock ratio(n)≥0.75,while diaphragm walls or hand-excavated piles combined with D-shaped steel tempo-rary beams are recommended for strata with n<0.75;③ Comprehensive evaluation of track settlement,segment safety factors,and construction impacts identifies the hand-excavated piles+D-shaped steel temporary beams scheme as optimal;④ Field monitoring confirms post-reinforcement track settlement reduction to 1.46 mm,with all safety indicators complying with speci-fications.This research provides practical references for proximity construction design of similar rectangular pipe jacking tunnels.关键词
隧道工程/矩形顶管/复合地层/近接施工/加固技术Key words
tunnel engineering/rectangular pipe jacking tunnel/composite stratum/proximity construction/reinforcement technology分类
交通工程引用本文复制引用
崔光耀,韩驰,麻建飞,宁茂权..复合地层超大矩形顶管隧道下穿高铁施工加固技术[J].华北水利水电大学学报（自然科学版）,2025,46(2):92-101,10.基金项目
国家自然科学基金项目(52178378) （52178378）
中铁第四勘察设计院集团有限公司科技研究开发项目(2020K143). （2020K143）
