Double-row-pile support system capable of overcoming local soft soil of foundation pit and construction method
A double-row pile, local technology, applied in the field of deep foundation pit support system construction, can solve problems such as imperfect connection and uneven local force
Pending Publication Date: 2018-07-20
CHINA RAILWAY 19TH BUREAU GRP 3RD
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Problems solved by technology
[0003] The invention provides a double-row pile support system and construction method that can overcome the local soft soil of the foundation pit, and solves the problem of partially changing the selected and implemented double-triangular double-row pile support into other support forms. The connection between the locally changed support form and the completed double triangle support structure is not perfect, which is likely to cause technical problems of uneven local stress
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[0014] The present invention is described in detail below in conjunction with accompanying drawing:
[0015] A double-row pile support system capable of overcoming the local soft soil of the foundation pit, comprising a rear row of piles 10, a middle rear row of piles 9, a front rear row of piles 2 and a front row of piles 1 at the local soft soil of the foundation pit, Between the rear row of piles 10 and the front row of piles 1 on the rear side, a rear connecting beam 6 is arranged, an intermediate connecting beam 7 is arranged between the rear row of piles 9 and the front row of piles 1 in the middle, and a rear connecting beam 7 is arranged between the rear row of piles 2 and the front row of piles on the front side. A front connecting beam 8 is arranged between the front row of piles 1, a crown beam 5 is arranged between the rear row of piles 10 on the rear side, the middle rear row of piles 9 and the front side rear row of piles 2, and a crown beam 5 is arranged between ...
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The invention discloses a double-row-pile support system capable of overcoming local soft soil of a foundation pit and a construction method. The problem that as for the situation that a selected andimplemented double-triangular double-row-pile support is locally replaced into other support forms, uneven local force bearing is easily caused by imperfect connection of the locally-replaced supportform and a completed double-triangular support structure is solved. A rear side connecting beam (6) is arranged between a rear-side rear row pile (10) and a front row pile (1), a middle connecting beam (7) is arranged between a middle rear row pile (9) and the front row pile, and a front-side connecting beam (8) is arranged between a front-side rear row pile (2) and the front row pile; and crown beams (5) are arranged between the rear-side rear row pile (10) and the middle rear row pile as well as between the middle rear row pile and the front-side rear row pile, a large-dip-angle jet groutingpile (3) is arranged between the front row pile and the middle rear row pile, and a precast concrete beam (4) is inserted into the large-dip-angle jet grouting pile. The design strength is met, and the whole structure of the support design is not changed.
Description
technical field [0001] The invention relates to the construction of a deep foundation pit support system, in particular to a double-row pile mechanism and a construction method for deep foundation pits with relatively soft local soil layers at the base. Background technique [0002] Double-row pile support for deep foundation pits is a new type of support structure developed in recent years. Compared with other support structure systems, the double-row pile support form has good lateral stiffness, which can effectively limit the support Lateral deformation of the structure. The support design method and construction of double-row piles have the advantages of convenience, no need to set lateral fulcrums, good stress conditions for the retaining structure, stability of the foundation pit, and construction safety, etc., and have been widely used in engineering. The double-triangular double-row pile support is suitable for deep foundation pits with relatively solid soil structu...
Claims
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IPC IPC(8): E02D17/04
CPCE02D17/04E02D2300/002
Inventor 张敏
Owner CHINA RAILWAY 19TH BUREAU GRP 3RD