Deep foundation pit excavation supporting method
A technology for deep foundation pits and supporting piles, applied in excavation, infrastructure engineering, construction, etc., can solve problems such as long construction period, and achieve the effects of improving construction efficiency, saving time, and reducing material waste
Active Publication Date: 2021-10-22
广东中城建设集团有限公司
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Problems solved by technology
[0003] In view of the above-mentioned related technologies, the inventor believes that there are the following defects: when constructing the support beam system, since it needs to rely on the cooperation of the first working surface and the side formwork for construction, it is necessary to maintain, remove the formwork and clean the upper support beam before it can be completed. Continue to excavate downwards and carry out the construction of the adjacent lower support beams. The support beams are constructed sequentially from top to bottom. The construction period is long and there is room for improvement
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[0043] The following is attached Figure 1-5 The application is described in further detail.
[0044] The embodiment of the present application discloses a deep foundation pit excavation support method.
[0045] refer to figure 1 , the excavation depth of the foundation pit in this application is 16.0m, a number of support piles are arranged at intervals along its circumference on the outside of the foundation pit, the support piles are arranged vertically, and a number of upright piles are arranged at intervals inside the foundation pit, and the upright piles are fixed There is a lattice column 1 used as a vertical load-bearing structure. In this embodiment, both the support piles and the column piles are piled by punching cast-in-place piles, and the support piles are not shown in the drawings.
[0046]In this application, three support beams are arranged at intervals along the vertical direction inside the end corner of the foundation pit, and the first support beam 21, t...
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The invention discloses a deep foundation pit excavation supporting method. The deep foundation pit excavation supporting method comprises the following steps: S1, carrying out primary earth excavation, and constructing a top beam at the top of a supporting pile; S2, construction of a supporting beam system: S21, downwards excavating from the outer edge of the supporting beam system to the bottom of a foundation pit, pouring concrete to form a concrete enclosure layer, and maintaining and cleaning the concrete enclosure layer; S22, after construction of the concrete enclosure layer is completed, carrying out secondary earth excavation to form a first working face, installing a steel formwork, and connecting the steel formwork with a latticed column and the concrete enclosure layer; and S23, chiseling concrete at the position corresponding to the end of the steel formwork close to the concrete enclosure layer, on the concrete enclosure layer to expose steel bars in the concrete enclosure layer, steel bars used for forming first supporting beams stretching into the steel bars of the concrete enclosure layer, and binding the steel bars. The method has the advantages that the overall construction period is shortened, and the construction efficiency is improved.
Description
technical field [0001] The invention relates to the field of excavation and support of deep foundation pits, in particular to a method for excavation and support of deep foundation pits. Background technique [0002] At present, the excavation of deep foundation pits is usually divided into multiple layers from top to bottom according to the height of the deep foundation pit. In order to increase the stability of the soil around the deep foundation pit, it is necessary to A plurality of vertically arranged support piles are constructed, and a plurality of column piles arranged at intervals are constructed in the foundation pit, and a lattice column used as a vertical bearing structure is fixed in the column piles. After the construction of the column piles is completed, it is necessary to carry out internal support for the end angle of the foundation pit, excavate downwards in the uppermost soil layer, and after excavating to a certain depth, construct the crown beam and con...
Claims
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IPC IPC(8): E02D17/04E02D5/18
CPCE02D17/04E02D5/18E02D2250/0023E02D2250/0007Y02E10/20
Inventor 王会清龙海为
Owner 广东中城建设集团有限公司