Method for processing soft soil foundation of high vacuum drainage filter pipe capable of being grouted

Abstract

The invention relates to a method for processing a soft soil foundation of a high vacuum drainage filter pipe capable of being grouted, comprising the following steps of: sinking the high vacuum vertical drainage filter pipe: putting a plate machine in place, installing a traction device of the high vacuum vertical drainage filter pipe in a pile pipe of the plate machine, sinking in place, and lifting the pile pipe of the plate machine; pre-pressing and draining the high vacuum vertical drainage filter pipe: arranging a vacuum pipeline system, draining and pre-pressing the high vacuum vertical drainage filter pipe and then downloading in a vacuum way; and grouting the high vacuum vertical drainage filter pipe: trying to grout so as to determine pressure and single-hole grouting quantity of double grouting processes, grouting cement paste firstly, grouting cement mortar secondarily, and compositely maintaining the foundation. By means of the method, the disadvantages, such as continuous secondary solidification and sedimentation of post-construction field soil, damages of the foundation and the structure and high maintenance cost, can be solved; the vacuum transfer loss is reduced;the secondary hole-forming cost is reduced; the property of soft soil is changed; the bearing capacity of the field soil is improved; and the sedimentation and deformation effects can be reduced.

Description

technical field [0001] The invention relates to a method for treating soft soil foundation, in particular to a method for treating soft soil foundation with a high-vacuum drainage filter pipe capable of grouting. Background technique [0002] Weak soil layers such as clay and silt are widely distributed in coastal and riverside areas, and have the characteristics of high water content, strong compressibility, poor permeability, low bearing capacity, and long consolidation time. For development and construction on weak soil layers, foundation treatment must be carried out; through foundation treatment, the bearing capacity of the site can be improved, uneven settlement can be eliminated, and post-construction settlement can be controlled to meet various technical requirements of development and construction. [0003] There are many soft soil foundation treatment technologies, commonly used are: pile foundation technology (steel pipe pile, concrete pile, wood pile, etc.), comp...

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Problems solved by technology

[0004] Before the present invention, affected by the characteristics of soft soil particles and the limitations of consolidation drainage technology, the surface bearing capacity of soft soil sites after consolidation drainage technology treatment is generally below 80kpa; as the soil layer distribution deepens, its water content and void ratio increase Large, the processing effect is reduced

In high-fill sites, storage yards, roads and other areas with heavy loads and deep soft soil layers, the settlement and consolidation speed of the site soil and the post-construction settlement are difficult to meet the design and use requirements if a single consolidation and drainage technology is used for treatment. Require

After construction, the soil continues to undergo secondary consolidation and settlement, causing damage to the upper foundation and structure, reducing the design life of the upper structure and resulting in high maintenance costs

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