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Efficient excavation construction method for deep foundation pit

A construction method and technology for deep foundation pits, which are applied in excavation, infrastructure engineering, artificial islands, etc., can solve problems such as affecting the construction progress of deep foundation pits and difficulty in roundness control.

Active Publication Date: 2021-04-30
SHANGHAI CONSTRUCTION GROUP
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  • Abstract
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Problems solved by technology

[0005] It is difficult to control the roundness of the existing circular horizontal support system, which affects the construction pr

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  • Efficient excavation construction method for deep foundation pit
  • Efficient excavation construction method for deep foundation pit

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. For the convenience of description, the "up" and "down" described below are consistent with the directions of up and down in the drawings, but this should not be a limitation of the technical solution of the present invention.

[0028] Such as figure 1 As shown, this embodiment takes the excavation construction of a deep foundation pit project as an example. The plane of the deep foundation pit is rectangular, the area is about 10,000 square meters, and the excavation depth is about 10m. After the deformation and stability analysis and calculation are carried out according to the construction specification design, Determi...

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Abstract

The invention discloses an efficient excavation construction method for a deep foundation pit, and relates to the technical field of deep foundation pit engineering. The efficient excavation construction method aims to solve the problem that the roundness control difficulty of an existing annular horizontal supporting system is large, so that the construction progress of deep foundation pit engineering is affected, and application of annular supports is limited to a certain extent. The efficient excavation construction method comprises the following steps that the deep foundation pit is divided into a circular center island area located in the middle and a peripheral area located outside the circular center island area, the peripheral area is excavated and constructed before the center island area, a first layer of earthwork in the peripheral area is excavated to the bottom of a first horizontal support, soil is reserved in the center island area, and circular ring supports are poured; the earthwork in the peripheral area is excavated to a pit bottom layer by layer from top to bottom, horizontal supports are poured and constructed layer by layer from top to bottom, foundation bottom plates and basement structures in the peripheral area are poured, circular ring supports are removed, then earthwork in the central island area is excavated, the basement structures in the peripheral area are constructed, and basement structures in the central island area are back built and constructed And communicate with the basement structures of the peripheral area.

Description

technical field [0001] The invention relates to the technical field of deep foundation pit engineering, in particular to a high-efficiency excavation construction method for deep foundation pits. Background technique [0002] With the continuous development and improvement of urban construction in our country, the scale of underground space development is also expanding, the scale of foundation pit projects is getting larger and deeper, and the surrounding environment is becoming more complex and sensitive. The time-space effect of large-scale deep foundation pit engineering is significant, and the high-risk environmental conditions further increase the difficulty of controlling foundation pit excavation. [0003] At present, reinforced concrete or steel trusses are generally used as the horizontal force transmission system in the excavation construction of deep foundation pit projects, combined with the basin excavation method of partitions and blocks. However, the truss s...

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Application Information

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IPC IPC(8): E02D17/02E02D17/04E02D29/05
CPCE02D17/02E02D17/04E02D29/05E02D2250/0023
Inventor 林巧
Owner SHANGHAI CONSTRUCTION GROUP
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