Outer-supported foundation pit support method
A foundation pit support and foundation pit technology, which is applied in excavation, infrastructure engineering, construction, etc., can solve problems such as increasing project cost, interfering with underground structure construction, and environmental impact, so as to improve construction efficiency, eliminate interference, and reduce engineering costs. The effect of cost
Active Publication Date: 2021-05-14
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
Method used
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Embodiment 1
[0051] Embodiment 1, external support type foundation pit support method, such as figure 1 and 2 As shown, in the soft ground layer 5, excavating a foundation pit with a depth of H includes the following steps in sequence:
[0052] S1. Set vertical body I1 and vertical body II2 according to the actual needs of support:
[0053] Set vertical body I1 on the side to be excavated, and the length of vertical body I1 is L 1 , the vertical body II2 is set on the outside, and the length of the vertical body II2 is L 2 ;
[0054] Note: The above-mentioned outside refers to the outside of the soft soil foundation pit, that is, the soft soil foundation pit is located inside the vertical body I1 and vertical body II2.
[0055] The tops of the vertical body I1 and the vertical body II2 are both flush with the ground 7, and L 2 less than or equal to L 1 , the vertical body I1 is parallel to the vertical body II2, and the horizontal distance between them is s1.
[0056] L 1 Take (2~3...
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The present invention proposes a support method for an externally supported foundation pit, which includes the following steps: S1, setting vertical body I and vertical body II, the tops of vertical body I and vertical body II are flush with the ground, and the vertical body The length of II is less than or equal to the length of the vertical body I; S2, set up the pier; S3, set up the diagonal brace components, the specific setting method is to set n layers of diagonal brace components from top to bottom at a depth of h1 from the ground; The top of each layer of bracing components is connected to vertical body II, and the bottom end is connected to vertical body II; the angle between each layer of diagonal bracing components and the horizontal plane is 40°~45°; each layer of diagonal bracing components It consists of at least two diagonal braces arranged in sequence along the length of the foundation pit, the horizontal distance between the diagonal braces is s2; S4, the foundation pit with a depth of H excavated from the ground. The external support type foundation pit support method proposed by the invention can reduce engineering cost and improve construction efficiency.
Description
technical field [0001] The invention relates to a foundation pit supporting method in the field of civil engineering, in particular to an externally supported foundation pit supporting method for soft ground. 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. [0003] Therefore, it is necessary to improve the prior art. Contents of the invention [0004] The technical ...
Claims
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IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 马海龙马宇飞
Owner ZHEJIANG SCI-TECH UNIV