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Foundation backfill reinforcement method

A technology of backfilling soil and foundation, which is applied in soil protection, infrastructure engineering, construction, etc., and can solve problems such as lack of settlement time and surface layer subsidence

Inactive Publication Date: 2014-05-21
SICHUAN YAHAO REAL ESTATE DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a reinforcement method for foundation backfill to solve the problem of surface layer subsidence caused by lack of sufficient settlement time in the backfill process

Method used

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  • Foundation backfill reinforcement method

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Embodiment

[0020] Such as figure 1 As shown in the present invention, a reinforcement method of foundation backfill soil is laid with a backfill soil layer 2 on the base soil layer 1, and a cushion layer 3 is laid on the backfill soil layer 2, and the cushion layer 3 is composed 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. A reinforced concrete slab 4 is arranged on the cushion layer 3, and 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 the grouting column 5 extending downward from the reinforced concrete slab 4 to the base soil layer 1 is set, and the grouting column 5 It is cylindrical, and a grouting steel pipe 7 is installed inside it. After drilling the hole to at least 2 meters below the ba...

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Abstract

The invention discloses a foundation backfill reinforcement method, wherein a hole is firstly drilled in a backfill layer to a foundation earth layer, the hole is grouted to form a grouting column, the grouting column extends upwards, a stirrup at the top end of the grouting column is connected with a rebar in a reinforced concrete plate, a mattress layer is paved on the backfill layer to serve as a supporting body and a bottom die for the reinforced concrete plate, the gravity of the reinforced concrete is mainly transferred through the grouting column to the foundation earth layer after the reinforced concrete is poured, a reinforced concrete plate layer does not settle obviously in the settling process of the backfill layer, hard plastic clay or a medium weathered mudstone layer is taken as the foundation earth layer according to the actual geological condition in the field in the practical construction process, the length of a pile tip of the grouting column entering the foundation earth layer is not less than 2.00 m, no settlement effect is produced because of the long formation time of the foundation earth layer, and the reinforced concrete plate layer does not settle in the settling process of the backfill layer.

Description

technical field [0001] The invention relates to an underground structure, in particular to a reinforcement method for foundation backfilling. 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): E02D3/00E02D3/08
Inventor 贺昶明
Owner SICHUAN YAHAO REAL ESTATE DEV
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