Newly hydraulically filled mucky soil soft foundation straw mattress preloading consolidation method
A technology of dredging silt and soft foundation, which is applied in soil protection, infrastructure engineering, construction, etc., to achieve the effect of saving sand and gravel, light weight and high cost
Inactive Publication Date: 2009-12-02
叶凝雯
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings, and provide a new dredging-fill muddy soil soft foundation grass mat preloading reinforcement method that can achieve the required reinforcement capacity even when machinery and equipment cannot enter the site.
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[0035] see figure 1 , the new dredging-fill muddy soil soft foundation straw mat preloading reinforcement method that the present invention relates to, described method comprises the following method steps:
[0036] Step 1. Lay 1-2 layers of geotextile on the surface of the area to be constructed
[0037] The geotextile used is 150g / m 2 ~200g / m 2 The function of the short-fiber non-woven geotextile is to prevent the mud from affecting the effect of the vacuum drainage system, and at the same time ensure the vacuum degree of the subsequent pre-compression.
[0038] Due to the three-high and one-low characteristics of the newly dredged muddy soil, personnel and equipment cannot enter. Therefore, floating boats or floating boards can be used to solve the problem of personnel entering the construction area when laying geotextiles.
[0039] Step 2. Connect the plastic drainage board and the branch pipe on the land
[0040] Enter the construction area through floating boats or f...
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The invention relates to a newly hydraulically filled mucky soil soft foundation straw mattress preloading consolidation method. The method comprises the following steps of: 1, paving one to two layers of geotextile on the surface layer of the newly hydraulically filled mucky soil soft foundation; 2, connecting plastic drain boards and branch pipes on land; 3, inserting the plastic drain boards; 4, connecting the branch pipes and a main pipe, and connecting the main pipe and a membrane-discharge device; 5, paving a straw filter layer, namely paving one to two layers of straw braid between the branch pipes to form the straw filter layer, wherein the thickness of the single layer of straw braid is between 10 and 20cm; 6, arranging observation instruments; 7, paving one to two layers of geotextile again; and 8, arranging a surface layer membrane sealing system, and connecting the membrane-discharge device and a vacuum pump system. To sum up, the method not only ensures the consolidation treatment of ultra-soft foundation, particularly the newly hydraulically filled mucky soil, but also saves a large amount of sandstone because the sand bed is not used in the construction method; moreover, because the straw braid can be recycled, the construction cost is lowered; and the radical problem that the newly hydraulically filled mucky soil and the ultra-soft soil cannot be put in construction is solved.
Description
(1) Technical field [0001] The invention relates to a large-area weak ground treatment. It is especially suitable for rapid reinforcement treatment of newly dredged muddy soil ultra-soft foundation. It belongs to the technical field of foundation treatment. (2) Background technology [0002] At present, with the rapid development of coastal areas, tidal flats and reclamation methods are used to solve the shortage of industrial land. For the treatment of this kind of soil, the "vacuum preloading method" has been successfully applied at present. However, since the newly filled muddy soil is generally "three highs and one low" (that is, high water content, high compressibility, high sensitivity, and low strength) muddy soil, when the dredged fill is completed, the water content is high and the strength is high. Low, personnel cannot enter. [0003] The vacuum preloading method is generally adopted to wait for its natural consolidation and a certain strength before entering ...
Claims
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Inventor 叶凝雯
Owner 叶凝雯