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Method for processing soft foundation by net bag method

A weak foundation and mesh bag technology, applied in soil protection, infrastructure engineering, construction, etc., can solve problems such as lack of compression and compaction of foundation soil, limited increase in bearing capacity, strong brine corrosion, etc., to achieve shortening Horizontal percolation path, enhanced strength, and accelerated drainage consolidation effects

Active Publication Date: 2009-07-08
陕西长嘉建设工程有限公司
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AI Technical Summary

Problems solved by technology

[0005] 2. In the dynamic ramming method and the dynamic ramming replacement method, the foundation soil of the weak foundation is saturated soil with high water content, which not only fails to compress and compact the foundation soil, but also easily forms "rubber soil" to improve the bearing capacity more limited
[0006] When the above two methods deal with foundation soil with undrained shear strength Cu<20kPa, it is difficult to double the bearing capacity of the foundation
Other methods such as deep mixing cement piles, CFG piles, and fly ash piles cannot be used in weak saline soil strata due to strong brine corrosion.

Method used

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Embodiment Construction

[0029] Such as figure 1 and figure 2 Shown, the method that net bag method of the present invention handles soft ground, concrete processing process is:

[0030] (1) Use an auger drilling rig to drill holes on the original foundation;

[0031] (2) Put the made acid and alkali corrosion-resistant polyethylene or polypropylene cylindrical net bag 1 into the cylindrical borehole, and the boreholes are arranged in an equilateral triangle on the foundation. The diameter of the borehole is 20-50cm. The depth is 5-10m, and the distance between two adjacent drilled holes is 0.5-1m; the cross-sectional diameter of the mesh bag 1 is 10-15mm larger than the cross-sectional diameter of the drilled hole, so that the mesh bag 1 is in good contact with the borehole wall 4, ensuring The net bag 1 enters the bottom of the hole smoothly; the size of the mesh on the net bag 1 is 2×2mm~5×5mm.

[0032] (3) Fill the mesh bag 1 with acid and alkali corrosion-resistant sandstone aggregate 5 to fo...

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Abstract

The invention provides a method for treating weak foundation by mesh bag method, which comprises: weaving mesh bags by macromolecular engineering materials, filling the mesh bags with sandstones as aggregate; planting into the holes drilled in the foundation and filling the holes with sandstone aggregate to form mesh bag sandstone piles; laying the mesh pieces woven by macromolecular engineering material and pad layer consisted of sandstone aggregate on the top surface of the pile and foundation; connecting the mesh open on the top of the mesh bag broken stone pile with the mesh pieces thereon; thus, the mesh and the mesh bags are connected into a complete reinforcing body in the foundation, and the reinforcing body and the original foundation together form a composite foundation. The invention is a simple and easy method, uses the polyethylene and polypropylene macromolecular engineering material with the advantages of high strength, acid-base resistance, anti-aging and anticorrosion; is more suitable for foundation treatment in salinized soil region with high corrosion to concrete and steel; achieves higher integrity of reinforcing body, can greatly increase the foundation bearing capacity and reduce settlement amount to reach the building design requirement.

Description

technical field [0001] The invention belongs to the technical field of building foundation treatment, and in particular relates to a method for treating weak foundations by a net bag method suitable for foundation treatment in saline soil areas which are highly corrosive to concrete and steel. Background technique [0002] Any building (structure) will be built on the foundation, so the quality of the foundation directly affects the safety of the building. Most natural foundations cannot meet the requirements of architectural design and need to be processed manually. The choice of treatment method depends not only on the requirements of the building for the foundation, but also on the mechanical properties of the original foundation soil. Weak foundation soil generally needs to be treated and transformed as a building foundation. Although the construction industry has researched and invented many treatment methods, the existing weak ground treatment methods cannot meet the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/08E02D3/10
Inventor 黄明王为民
Owner 陕西长嘉建设工程有限公司
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