铁道标准设计2017，Vol.61Issue(4)：111-116,6.DOI:10.13238/j.issn.1004-2954.2017.04.024
重载铁路隧道穿越富水砂层综合施工技术研究
Study on Comprehensive Construction Technology for Heavy Haul Railway Tunnel Passing Water-rich Sand Layer
展宏跃1
作者信息
- 1. 铁道第三勘察设计院集团有限公司,天津 300142
- 折叠
摘要
Abstract
Where a heavy haul railway tunnel long passes through tertiary water rich sand stratum, the loss of sand particles on account of water flow, the increase of water content in silty clay, the deformation and loss of stability of face sand layer and silty clay, the local sand gushing, mud bursting and water inrush are encountered because of underwater seepage due to tunnel excavation, which seriously affect the construction progress.Based on formation characteristics and cause analysis, dynamic design by means of theory and field test is conducted to ensure the safety of construction.Advanced grouting in surrounding rock is used to block groundwater and tunnel face fiberglass bolt grouting is employed to improve the overall stability of the tunnel face core soil.Arch leading large pipe roof reinforcement is designed to control the deformation of surrounding rock and long catheter drainage pressure is proposed to reduce surrounding sand moisture content.Quick excavation, quick supporting and quick closing are performed to achieve safe excavation and rapid passing.All these measures may provide references for similar projects.关键词
重载铁路/隧道/富水砂层/动态设计/超前注浆/泄水降压Key words
Heavy haul railway/Tunnel/Water-rich sand/Dynamic design/Advanced grouting/Discharge to reduce pressure分类
交通工程引用本文复制引用
展宏跃..重载铁路隧道穿越富水砂层综合施工技术研究[J].铁道标准设计,2017,61(4):111-116,6.
