Shield tunnel lateral cross-over pile base construction method
A technology for shield tunneling and construction methods, which is applied in tunnels, earth-moving drilling, mining equipment, etc., can solve problems such as affecting the safety of existing pile foundations and surrounding environmental facilities.
Active Publication Date: 2010-11-17
CHINA RAILWAY NO 2 ENG GRP CO LTD
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Problems solved by technology
[0005] Such close-up construction generally requires complex and strict auxiliary measures, and a little carelessness may seriously affect the safety of existing pile foundations and surrounding environmental facilities.
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Embodiment
[0040] This embodiment is a construction method for the shield tunnel (Jiuting Station-Qibao Station) shield tunneling (Jiuting Station-Qibao Station) of the first phase project of Shanghai Rail Transit Line 9 that crosses the bridge pile of the first pier of the Zhongchun Road Overpass Bridge, and its technological process Such as figure 1 As shown, it specifically includes the following main steps:
[0041] First, engineering research:
[0042] Investigate the basic conditions of the pile foundation and the surrounding environment that the shield tunnel needs to pass through in the crossing section: the shield tunnel needs to pass through two spans of the Zhongchun Road overpass, which is very close to the bridge pile of one of the piers, only about 1.5m; according to The impact zoning standard proposed by Japan on the construction of tunnels close to existing structures, the tunnel construction area belongs to the strong impact area;
[0043] Second, the analogy and calcu...
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The invention discloses a construction method on the side-crossing pile foundation in the shield tunnel, the main procedures comprises: the investigation and research of the project, the analogy and the computational analysis on the side-crossing pile foundation, the study and decision of the construction plan, the preliminary shield parameters for the shield construction of the side-crossing pile foundation and so on; wherein, the preliminary shield parameters mainly comprises the earth pressure, the advancing speed, the injection amount of the mortar, the rectification amount and so on; during the shield construction process of the side-crossing pile foundation, a computer is adopted to realize the real-time monitoring on the displacement of the deep soil, the displacement of the pile foundation and so on. With the method provided by the invention, the construction of the crossing pile foundation can be finished safely and smoothly without any accessory method; also, the method has no distinct influence on the existing pile foundation at the near distance and the surrounding environment.
Description
technical field [0001] The invention relates to a construction method for a shield tunnel crossing a pile foundation laterally, and belongs to the technical field of tunnel shield proximity construction. Background technique [0002] Shield method tunnel construction is a construction method of underground excavation and construction of tunnels under the ground. Shield tunneling is used as a tool for excavating underground soil, supporting soil and assembling tunnel lining. One ring is excavated, one ring is assembled, and the cycle Work until the entire tunnel is complete. Compared with the traditional drilling and blasting method, the shield tunneling method has the advantages of high degree of automation, strong adaptability to different geological conditions, little impact on urban residents and buildings, good for controlling surface subsidence in weak strata, and high safety. . [0003] The first phase project of Shanghai Rail Transit Line 9 R413 shield tunnel (Jiuti...
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IPC IPC(8): E21D9/00E21D9/093
Inventor 李林陈强崔学忠
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD