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Construction method of complex geological conditions in the pit Larson steel plate pile in the pit

A Larsen steel sheet pile technology with complex geological conditions, applied in sheet pile wall, excavation, infrastructure engineering and other directions, can solve the problems of difficult construction and high safety risk, improve construction efficiency, reduce costs, and improve lateral The effect of resistance

Active Publication Date: 2021-05-18
CHINA FIRST METALLURGICAL GROUP
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Problems solved by technology

[0003] In view of the above technical problems, the purpose of the present invention is to provide a pit-in-pit Larsen steel sheet pile construction method under complex geological conditions, which is used to solve the difficulty and safety of pit-in-pit Larsen steel sheet pile construction under complex geological conditions in the prior art high risk issues

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  • Construction method of complex geological conditions in the pit Larson steel plate pile in the pit
  • Construction method of complex geological conditions in the pit Larson steel plate pile in the pit

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Embodiment Construction

[0028] In order to better understand the present invention, the technical solutions of the present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0029] Such as figure 1 As shown, a pit-in-pit Larsen steel sheet pile construction method with complex geological conditions includes the following steps:

[0030] S1. Larsen steel sheet pile construction: According to the excavation depth of the pit-in-pit 7 foundation pit, surrounding environmental conditions, construction site layout and engineering geological conditions, use Larsen steel sheet pile 2 (Larsen 6# steel plate, 11m-15m in length) Stop water and protect the 7 foundation pits in the pit, and set up dewatering wells according to the groundwater conditions for dewatering treatment until the water level in the pit drops to 0.5 meters below the pit;

[0031] S2. Pit-in-pit construction: firstly reinforce the soil within the scope of the foundation pit, and t...

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Abstract

The present invention relates to a pit-in-pit Larsen steel sheet pile construction method under complex geological conditions, comprising the following steps: S1, Larsen steel sheet pile construction, S2, pit-in-pit construction, S3, cushion and cap construction, S4, temporary slope Construction, S5, installation of diagonal bracing system, S6, basement shear wall construction, S7, removal of Larsen steel sheet piles. The invention provides a brand-new support system. Firstly, the pit-in-pit and its surrounding cushions are constructed, the cap is poured, and the cap is installed between the cap and the Larsen steel sheet pile by using the supporting function of the pit-in-pit wellhead cap. The diagonal bracing system composed of braces and central columns solves the problems of the traditional brace support system occupying the excavation work surface and the lagging progress of the pit-in-pit construction, as well as the problem of the uplift of the pit bottom under complex geological conditions, and improves the stability of the foundation pit. .

Description

technical field [0001] The invention belongs to the field of building construction engineering construction, and in particular relates to a pit-in-pit Larsen steel sheet pile construction method under complex geological conditions. Background technique [0002] With the rapid development of urban construction, there are more and more large-scale public buildings facing the sea and river, which gradually become the business card of creating urban landscape. Due to the short artificial backfilling time of original landforms such as coastal beaches, ponds, and depressions, the self-consolidation of the earth has not been completed or the simple soft foundation treatment, but the fluid plastic thick and large silt layer in the excavation range of the deep foundation pit, and the water content is rich. Unfavorable geological conditions such as quicksand layers bring greater construction difficulty and safety risks to foundation pit support and earthwork excavation. In particular...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04E02D5/04
CPCE02D5/04E02D17/04
Inventor 廖红玉余珊鲁炳奎
Owner CHINA FIRST METALLURGICAL GROUP
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