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Basement backfill area reinforcing method

A basement and regional technology, applied in soil protection, construction, infrastructure engineering, etc., can solve problems such as surface layer sinking and lack of settlement time

Inactive Publication Date: 2016-04-27
牟绍林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for strengthening the backfill area of ​​the basement, which can solve the problem of surface layer subsidence caused by the lack of sufficient settlement time in the backfill process

Method used

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  • Basement backfill area reinforcing method

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Embodiment

[0020] Such as figure 1 As shown, a method for reinforcing a basement backfill area of ​​the present invention comprises a base soil layer 1, a backfill soil layer 2 is laid on the base soil layer 1, a mattress layer 3 is laid on the backfill soil layer 2, and the mattress layer 3 Consisting of graded sand and gravel, the maximum particle size is less than 3.0cm, the mud content is less than 5%, and its thickness is 15cm to 25cm. On the cushion layer 3, a reinforced concrete slab 4 is arranged. The thickness of the reinforced concrete slab 4 is Generally not less than 30cm, there are two layers of steel mesh 6 in the reinforced concrete slab 4, the diameter of the steel bar is not less than Ф14, the filling material is C25 concrete, and grouting is provided in the part extending downward from the reinforced concrete slab 4 to the base soil layer 1 Column 5, grouting column 5 is cylindrical, and grouting steel pipe 7 is installed inside it, after drilling to at least 2 meters b...

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Abstract

The invention discloses a basement backfill area reinforcing method. A foundation soil layer is provided; a backfill soil layer is laid on the foundation soil layer; a mattress layer is laid on the backfill soil layer; a reinforced concrete slab layer is arranged on the mattress layer; and a grouting column extending downwards into the foundation soil layer from the reinforced concrete slab layer is also provided. A hole is formed in the backfill soil layer and reaches the interior of the foundation soil layer, then the hole is grouted to form the grouting column, the grouting column extends upwards, the top end of the grouting column is connected with steel bars in reinforced concrete, the mattress layer is laid on the backfill soil layer and acts as a foundation of reinforced concrete, and after reinforced concrete is poured, the gravity of reinforced concrete is transferred to the foundation soil layer through the grouting column. The formation time of the foundation soil layer is long, so that no subsidence effect can be produced, and in a subsidence process of the backfill soil layer, the reinforced concrete slab layer can not subside.

Description

technical field [0001] The invention relates to an underground structure, in particular to a method for reinforcing a basement backfill area. Background technique [0002] In modern buildings, deep foundation pits or basement excavations are becoming more and more common and have more and more uses. The construction period required in the current construction industry is getting shorter and shorter. Large-scale basement structures usually adopt the form of foundation pits. The construction process of the foundation pit in the lower room is as follows: according to the engineering geology and groundwater conditions, take effective measures to reduce the groundwater level, so that the excavation of the foundation pit and the construction surface will reach an anhydrous state, so as to ensure the quality and safety of the project and the smooth progress of the project; Mechanical excavation, the excavation depth is determined according to the design, generally required to be 30...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/08
Inventor 牟绍林
Owner 牟绍林
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