中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (S2): 77-81.doi: 10.16265/j.cnki.issn1003-3033.2019.S2.013

• 安全工程技术科学 • 上一篇    下一篇

软土地基框构桥顶进施工方法和控制措施研究*

赵永船 高级工程师, 张宁 高级会计师   

  1. 中国铁路北京局集团有限公司,北京 100860
  • 收稿日期:2019-07-11 修回日期:2019-09-20 出版日期:2019-12-30 发布日期:2020-10-28
  • 作者简介:赵永船 (1970—),男,北京人,本科,高级工程师,主要从事铁路建设管理方面的工作。E-mail:zhaoyc810@163.com。

Jacking construction method and control measures of frame bridge on soft soil foundation

ZHAO Yongchuan, ZHANG Ning   

  1. China Railway Beijing Bureau Group Co., Ltd., Beijing 100860, China
  • Received:2019-07-11 Revised:2019-09-20 Online:2019-12-30 Published:2020-10-28

摘要: 为避免在软土地基框构桥顶进施工中发生路基塌方、桥体开裂、线路变形等安全质量事故,以津山线K157+171.43蓟汕联络线14 m-17 m-5 m-17 m-14 m五孔框架桥顶进施工为例,介绍在软土地基中采用扣轨加固暗挖顶进的施工方法和控制措施,并与军便梁支撑桩加固线路顶进方法、明挖顶进施工方法对比分析。结果表明:扣轨加固暗挖顶进施工方法具有投资小、适用性强、对铁路运输影响小、安全风险可控的优点;控制措施方面,在地下水位较高的软土地基顶进框构桥施工中,施工降水、注浆加固的质量控制是防止顶进中出现塌方、线路变形等问题的关键。

关键词: 框构桥, 软土地基, 顶进, 控制措施, 施工降水, 注浆加固

Abstract: In order to avoid safety and quality accidents such as subgrade collapse, bridge body cracking and line deformation in jacking construction of frame bridge on soft soil foundation, construction method and control measures of using rail fastening and concealed excavation jacking were introduced with jacking construction of five hole frame bridge of 14 m-17 m-5 m-17 m-14 m-14 m of Jishan line K157 + 171.43 as an example. Then they were analyzed and compared with jacking method of lines reinforced by supporting pile of military variable beam and that of open excavation. The results show that jacking method of hidden excavation and track fastening reinforcement has the advantages of small investment, strong applicability, small impact on railway transportation and controllable safety risk. At the same time, control measures in construction of jacking frame bridge in soft soil foundation with high groundwater level, quality control of construction precipitation and grouting reinforcement are the key to prevent collapse and line deformation during jacking, which has guiding significance for similar construction in the future.

Key words: frame bridge, soft soil foundation, jacking, control measures, construction precipitation, grouting reinforcement

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