Subway transfer station deep foundation pit excavation support construction method

A construction method and technology for deep foundation pits, applied in excavation, infrastructure engineering, construction, etc., can solve the problems of many construction stages, long construction period and low efficiency.

Inactive Publication Date: 2021-05-18
ANHUI HIGHWAY BRIDGE ENG CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In traditional transfer station foundation pit construction, horizontal isolation piles are set at the node positions, and stations with different depths are excavated in sections according to the principle of from shallow to deep. First, two-story stations are excavate...

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  • Subway transfer station deep foundation pit excavation support construction method
  • Subway transfer station deep foundation pit excavation support construction method
  • Subway transfer station deep foundation pit excavation support construction method

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] Such as figure 1 As shown, the construction method for excavating and supporting the deep foundation pit of the subway transfer station includes the following steps:

[0044] (1) Construction preparation:

[0045] Do a good job in the removal and transportation of construction wastewater and engineering waste to ensure that the entire construction period meets environmental protection requirements, and confirm whether the sand, cement, stones and other materials used in the project are qualified through random inspections, and debug related construction equipment;

[0046] (2) Drainage in the field:

[0047] Do a good job of drainage in the construction site to ensure that the water outside and in the pit of the construction site is discharged;

[0048] (3), ground connection wall construction:

[0049] Carry out ground connection wall positi...

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Abstract

The invention discloses a subway transfer station deep foundation pit excavation support construction method. A diaphragm wall enclosure structure is adopted, concrete supports and steel pipe combined supports are arranged, the inner side concrete supports form annular reinforced concrete supports, concrete support formworks adopt prefabricated reverse pressing block reverse pressing easy-to-dismantle formwork systems and shaped formwork systems, built-in segmental steel of waist beams and the diaphragm wall enclosure structure are combined in an anchoring-hanging mode to form a whole, and latticed columns adopt flexible anti-collision construction protection devices. The construction method comprises the steps of (1) construction preparation, (2) drainage in a field, (3) diaphragm wall construction, (4) concrete support and waist beam reinforcement cage binding, (5) concrete support and waist beam formwork erection, (6) concrete pouring and maintenance, (7) formwork removal and foundation pit excavation, and (8) construction of the next layer of concrete supports. According to the subway transfer station deep foundation pit excavation support construction method, the overall safety and stability of a foundation pit are guaranteed, the construction speed is greatly increased, and obvious social benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a method for excavating and supporting a deep foundation pit of a subway transfer station. Background technique [0002] With the rapid development of urban rail transit, more and more cities have begun to build a rail transit network skeleton composed of multiple subway lines. The traffic must be transferred between lines. For hubs, the civil construction is difficult and the construction period is long. How to coordinate the excavation of foundation pits of different depths, especially the excavation and support of node positions, is the focus of the construction of the entire transfer station. [0003] In traditional transfer station foundation pit construction, horizontal isolation piles are set at the node positions, and stations with different depths are excavated in sections according to the principle of from shallow to deep. First, two-story stations are excavated, and th...

Claims

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Application Information

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IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 牛奔王生涛宋帧沐雨浩刘成龙夏欢欢
Owner ANHUI HIGHWAY BRIDGE ENG CO LTD
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