›› 2010, Vol. 31 ›› Issue (3): 932-938.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of raising pipeline by fracture grouting and its application

SUN Feng1，ZHANG Ding-li1，WANG Chen2，FANG Qian1，LI Bing1   

  1. 1. Tunnel and Underground Engineering Research Center of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China; 2. Beijing Urban Engineering Design & Research Institute Co., Ltd., Beijing 100037, China
  • Received:2009-07-20 Online:2010-03-10 Published:2010-03-31

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Abstract:

Many tunnels need cross the bottom of the existing pipelines during metro station excavation. Surface settlement and ground loss can be found during tunnel excavation; and the deformation of underground pipeline is brought consequently. In general, the key measure to pipeline recovering is grouting, which means grouting in subjacent bed to raising the pipeline. Based on the project of raising an existing pipeline by grouting during the construction of Huangzhuang station of Beijing metro, 3-D finite difference method is used to study the feature of pipeline deformation caused by tunnel excavation. In numerical simulation, expanding pressure is applied to the grouting elements to simulate the heaving effect of the pipeline; strain-softening model is suitable for simulating elastoplastic behavior of soil, and embodying the interaction between grouting and soil. The conclusions of numerical analysis agree well with the in-site measured data, which can contribute to the construction and design of raising pipeline by fracture grouting in tunneling.

Key words: fracture grouting, metro station, surface settlement, pipeline deformation, strain softening

CLC Number: 

  • U 459.2
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