软土地区超大断面矩形顶管施工地表沉降分析

Analysis on Surface Settlement of Extra-large Section Rectangular Pipe Jacking Construction in Soft Soil Area

摘要:

依托上海市某矩形顶管工程实测数据，对超大断面矩形顶管施工引起的地表轴线沉降、剖面沉降和随顶进里程变化特点等进行了分析，提出了矩形顶管施工沉降控制要点。同时，结合实测数据探讨了Peck公式在超大断面矩形顶管沉降预测中的适用性，为同类工程沉降槽宽度系数、地层损失的取值提供经验参考。

Abstract:

Based on the measured data of a rectangular pipe jacking project in Shanghai, the characteristics of surface axis settlement, section settlement and variation with jacking mileage caused by extra-large section rectangular pipe jacking construction are analyzed, and the key points of settlement control of rectangular pipe jacking construction are put forward. Combined with the measured data, the applicability of Peck formula in the settlement prediction of extra-large section rectangular pipe jacking is discussed, which provides experience reference for the value of settlement groove width coefficient and formation loss in similar projects.