Inner-support-free support method for soft soil foundation pit top sloping
A foundation pit and soft soil technology, applied in excavation, foundation structure engineering, construction, etc., can solve the problems of reducing the excavation efficiency in the foundation pit, interfering with the construction of underground structures, and increasing the cost of the project, so as to improve the construction efficiency, reduce the cost of the project, The effect of eliminating distractions
Inactive Publication Date: 2019-01-04
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology
The internal support system is composed of column piles, columns and horizontal support beams, which increases the cost of the project and reduces the excavation efficiency in the foundation pit
In addition, with the construction of the underground structure, the internal support also needs to be removed layer by layer, which affects the environment and interferes with the construction of the underground structure
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Embodiment 1
[0056] Embodiment 1, a kind of non-inner support support method of soft soil foundation pit top grading, such as figure 1 with 2 As shown, in the soft ground layer 6, excavating a foundation pit with a depth of H includes the following steps in sequence:
[0057] S1. Set vertical body I1 and vertical body II2 according to the actual needs of construction:
[0058] Set vertical body I1 on the side to be excavated in soft soil foundation pit, the length of vertical body I1 is L 1 , the top of the vertical body I1 is located at the depth a4 below the ground 8;
[0059] Vertical body II2 is set on the outside, and the length of vertical body II2 is L 2 ; The tops of the vertical body Ⅱ2 are all flush with the ground 8, and L 2 less than or equal to L 1 +a4, the vertical body I1 is parallel to the vertical body II2, and the horizontal distance is s1.
[0060] Note: The above-mentioned outside refers to the outside of the soft soil foundation pit, that is, the soft soil founda...
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The invention provides an inner-support-free support method for soft soil foundation pit top sloping. The method comprises the following steps that firstly, a vertical body I and a vertical body II are arranged, the top end of the vertical body I is located below the ground by the depth of a4, and the top end of the vertical body II is flush to the ground; secondly, a buttress is arranged; thirdly, an inclined support piece assembly is arranged and composed of at least two inclined support pieces sequentially arranged in the length direction of a foundation pit, the top ends of the inclined support pieces and the top end of the vertical body II are connected on the ground, and the bottom ends are connected with the vertical body I; fourthly, an inclined pull piece assembly is arranged andcomposed of at least two inclined pull pieces sequentially arranged in the length direction of the foundation pit, the top ends of the inclined pull pieces are connected with the top end of the vertical body I, the inclined pull pieces intersect with the vertical body II at the point A, and the inclined support pieces and the inclined pull pieces are arranged on the horizontal plane in a staggeredmanner; and fifthly, a horizontal piece assembly is arranged, and the foundation pit with the depth being H is downwards excavated from the ground.
Description
technical field [0001] The invention relates to a method for supporting a foundation pit in the field of civil engineering, in particular to a method for supporting a foundation pit in soft soil without internal support. Background technique [0002] In the foundation pit in soft soil, when the excavation depth is greater than 7m, it is necessary to use internal support to resist the earth pressure acting on the vertical support body, which is a passive support function. The internal support system consists of column piles, columns and horizontal support beams, which increases the project cost and reduces the excavation efficiency in the foundation pit. In addition, with the construction of the underground structure, the internal support also needs to be removed layer by layer, which affects the environment and interferes with the construction of the underground structure. Contents of the invention [0003] The technical problem to be solved by the present invention is to...
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IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 马海龙马宇飞
Owner ZHEJIANG SCI-TECH UNIV