盾构影响乌准铁路桥预掘进实验研究

Experimental Study on Pre-Excavation of Wuzhun Railway Bridge Affected by Shield

摘要: 盾构施工穿越已建成铁路桩基时，会造成土体扰动，进而产生地表沉降和影响桩基稳定性。本文通过新疆地铁一号线某区间的盾构预掘进实验，分析出造成土体变形沉降的主要因素为推进速度、土压力、出土量、注浆量、盾构施工总推力和刀盘扭矩等，并据此在后期施工中设计合理的施工参数，以保证盾构施工的可靠性和铁路运营的安全性。

Abstract: When the shield tunneling passes through the built railway pile foundation, it will cause soil dis-turbance, which will cause surface settlement and affect the stability of the pile foundation. In this paper, through the shield pre-excavation experiment in a certain section of Xinjiang Metro Line 1, the main factors causing the deformation and settlement of the soil are the propulsion speed, earth pressure, soil discharge, grouting volume, total thrust of the shield construction and cutter torque. According to this, reasonable construction parameters are designed in the later construction to ensure the reliability of the shield construction and the safety of railway operation.