Foundation ditch construction method of horizontal bracing structure of central island floor slaps

A technology of horizontal bracing and construction method, applied in basic structure engineering, excavation, construction, etc., can solve the problems of poor deformation control ability of diagonal bracing, reduced deformation due to construction efficiency, and increased difficulty of excavation, so as to achieve clear support force, The effect of solving waterproof problems and facilitating earthwork excavation

Inactive Publication Date: 2013-05-15
ANHUI URBAN CONSTR DESIGN & RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. Method 2. Applying temporary steel braces from the bottom plate to the surroundings is the smooth construction of the surrounding structures. The ability of the braces to control deformation is relatively poor, and the difficulty of digging is greatly increased after the braces are applied, because mechanical equipment cannot excavate the braces. The soil below must cooperate with a large number of manual excavations, resulting in greatly reduced construction efficiency and difficult to strictly control deformation

Method used

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  • Foundation ditch construction method of horizontal bracing structure of central island floor slaps
  • Foundation ditch construction method of horizontal bracing structure of central island floor slaps
  • Foundation ditch construction method of horizontal bracing structure of central island floor slaps

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Embodiment example 1

[0032] figure 1 The structural cross-sectional schematic diagram of the central island as the main building provided for the implementation of Case 1, image 3 The schematic diagram of the foundation pit support plane provided for the implementation of Case 1, refer to figure 1 , image 3 , the main structure to be built in the foundation pit of Implementation Case 1 has two main buildings and a two-story underground garage. The excavation depth of the foundation pit is 10m, and the surrounding environment is complex, which requires strict control of the deformation of the foundation pit. The "central island method" is adopted for the support of the foundation pit, and a two-layer horizontal support structure is applied from the central island floor to the enclosure structure.

[0033] The enclosure structure 1 adopts row piles, and the enclosure piles adopt 800mm diameter bored piles to form a row pile structure at a certain distance, and the piles are connected by crown be...

Embodiment example 2

[0051] figure 2 Schematic diagram of the structural section of the central island provided for the implementation of Case 2 when it is a basement, Figure 5 For the structural schematic diagram of the support provided for the implementation case 2, refer to figure 2 , Figure 5 , the difference between implementation case 1 and implementation case 2 is that the center island in implementation case 2 is a basement, and the structure of support 7 is slightly different from implementation case 1, refer to Figure 5 , Bearing 7 is in the basement and is the construction of the center island, so adding the armpit beam 14 is adopting the way of triangular body structure.

[0052] The rest are the same as the implementation case 1.

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Abstract

The invention discloses a foundation ditch construction method of a horizontal structure of central island floor slaps. The method comprises the following steps: constructing an envelope enclosure on the side wall of the foundation ditch; excavating the earthwork of the middle portion of the foundation ditch to the bottom and naturally carrying out the construction to plus-minus zero to form the central island structure; leaving a soil slope on the foundation ditch except for the central island structure; arranging supporting seats and the horizontal supporting structures on the edges of the floor slaps of the plus-minus zero layer from the floor slaps of the central island to floor slaps of the foundation ditch bottom layer in sequence, and fixing one end of the horizontal supporting structure on each supporting seat and fixing the other end of the horizontal supporting structure on the envelope enclosure structure and evacuating the soil slope which is under the horizontal supporting structure arranged by the floor slaps of the layer to the bottom elevation of the horizontal supporting structure of the next layer of floor slaps; and constructing naturally the surrounding areas to the plus-minus zero. The foundation ditch construction method of the horizontal bracing structure of central island floor slaps has the advantages that the central island floor slaps are used for adding horizontal supportings to the surrounding envelope enclosure structures. Compared with the existing steel inclined sturts which are used frequently, horizontal stiffness is improved, supporting atress is more clear, the deformation of the foundation ditch can be better controlled and safety is increased.

Description

technical field [0001] The invention relates to a foundation pit construction method using a horizontal support structure of a center island floor slab, which is mainly applied in the technical field of building construction. Background technique [0002] At present, the "central island method" is commonly used in the construction of foundation pits. The domestically adopted "central island method" foundation pit support methods are divided into two types: 1. The central island is parallel to the surrounding structure; 2. The central island is parallel to the surrounding structure. Make the surrounding structure along the way. Among them, method 1 constructs the beam slab or beam grid of the surrounding underground structure from top to bottom after the construction of the center island structure reaches positive and negative zero, and supports it to the side wall enclosure structure of the foundation pit; method 2 constructs the bottom plate of the center island structure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02
Inventor 蔡敏束冬青李彪单灿灿
Owner ANHUI URBAN CONSTR DESIGN & RES INST
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