Problems for reconstruction of foundation pits
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摘要: 基坑改造是指为保证基坑、主体基础结构的施工安全和周边环境不受损害,而采取的对既有基坑进行加固的重要施工措施。文章从基坑上部维护、锚杆加固、坑内施工三轴搅拌桩等多方面,对既有超期服役基坑进行了分析,就解决超期服役基坑所面临的问题可供深基坑工程设计、施工人员参考。Abstract: Reconstruction of foundation pits refers to taking measures to reinforce the existing foundation pits to ensure the construction safety of foundation pits and main infrastructures and the surrounding environment without damage. The existing over-service foundation pits are analyzed from the aspects of upper maintenance of foundation pits, anchor reinforcement and construction of three-axis mixing piles in the pits, and puts forward valuable experience is put forward to solve the problems faced by the over-service foundation pits.
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Keywords:
- foundation pit /
- over-service /
- upper maintenance /
- prestressed bolt /
- re-tensioned locking /
- water curtain
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[1] 邱鸿江. 深基坑支护的超期使用与加固[J]. 工程技术, 2010(8): 202. (QIU Hong-jiang. Extended use and reinforcement of deep foundation pit support[J]. Engineering and Technology, 2010(8): 202. (in Chinese)) [2] 张懿. 既有深基坑加固改造工程施工研究[J]. 住宅与房地产, 2017(2): 230. (ZHANG YI. Study on the construction of existing deep foundation pit reinforcement and reconstruction project[J]. Housing and Real Estate, 2017(2): 230. (in Chinese)) [3] JGJ120—99建筑基坑支护技术规程[S]. 1999. (JGJ120—99 Technical specifications for foundation pit support of buildings[S]. 1999. (in Chinese)) [4] CECS22:90土层锚杆设计与施工规范[S]. 1990.
(CECS22:90Code for design and construction of soil layer anchor[S]. 1990. (in Chinese))[5] CECS 22:2005岩土锚杆(索)技术规程[S]. 2005.
(CECS22:2005 Technical specification for rock and soil bolt (cable)[S]. 2005. (in Chinese))
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