Method for reducing side load influence

A technology of side load and side wall, applied in the direction of excavation, filling, water conservancy projects, etc., can solve the problems of increasing tensile force on the top surface of the bottom plate and uneven settlement, etc., and achieve the effect of eliminating the impact.

Active Publication Date: 2012-07-04
SHANGHAI INVESTIGATION DESIGN & RES INST
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Problems solved by technology

[0004] (2) The vertical side load caused by the self-weight of the filling soil causes the tensile force on the top surface of the bottom slab to increase significantly
[0006] (4) The vertical side load of the fill drives the settlement of the adjacent soil, causing the settlement of the structure on the side adjacent

Method used

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Example Embodiment

[0024] combine figure 1 The method for reducing the influence of the edge load involved in the present invention will be further explained. figure 1 A schematic diagram of the construction using this method. This method is carried out in sequence as follows:

[0025] (1) The foundation pit is grading and excavating normally (see figure 1 Middle excavation face 11);

[0026] (2) At the position close to the side wall of the main structure 13, backfill soil is constructed in advance to form an approximately vertical side slope 12;

[0027] (3) Construction of the main structure 13;

[0028] (4) The gap between the structural side wall and the vertical slope is filled ( figure 1 The middle is backfill soil 14).

[0029] In the past, the construction of backfilling was usually carried out after the construction of the main structure, but in the present invention, the backfilling should be done before the construction of the main structure, the earlier the better, so as to fo...

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Abstract

The invention discloses a method for reducing a side load influence, which is characterized by comprising the following steps: (1) carrying out foundation pit slope setting excavation; (2) performing backfill construction in advance close to the position of a main body structure side wall, and forming an approximately vertical side slope; (3) carrying out main body structure construction; and (4) filling gaps between the structure side wall and the vertical side slope. In the prior art, backfill construction is usually performed after the main body structure construction, while the method for reducing the side load influence enables the backfill construction to be performed prior to the main body structure construction so as to form prepressing to foundation soil and reduce and even substantially eliminate the influence of a vertical side load. Besides, due to the fact that the vertical side slope is self-stabilized, soil pressure on structure side wall is extremely small, and the whole construction scheme is economical, convenient, safe and reliable.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for reducing the influence of side loads by backfilling underground structures after excavation. Background technique [0002] At present, for sluices, pumping stations, retaining walls or other underground structures, the foundation pit excavation method often adopted is large excavation on slopes, and backfilling is carried out after the main structure is completed. Compared with other maintenance excavation methods, the large excavation method of foundation pit has the advantages of convenient construction and low investment, but it often brings the following disadvantages to the structure: [0003] (1) The filling soil produces a large horizontal earth pressure on the side wall of the structure. [0004] (2) The vertical side load caused by the self-weight of the filling soil causes the tensile force on the top surface of the bottom slab to increase signif...

Claims

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Application Information

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IPC IPC(8): E02D17/02E02D17/18E02D17/20E02D29/045
Inventor 万里飘米有明刘勇沈波
Owner SHANGHAI INVESTIGATION DESIGN & RES INST
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