Combined method for fastening soft soil ground by dual vacuum prepressing and dynamic extruding method

A soft soil foundation and joint reinforcement technology, which is applied in the field of sea reclamation or low-lying land filling engineering, silt, and muddy soil foundation, can solve the problem of uneven thickness of mud seal layer, small joint preloading load, and influence on reinforcement effect and other problems, to achieve the effect of reducing post-construction settlement, improving consolidation index, and saving reinforcement energy consumption
CN100516375CInactive Publication Date: 2009-07-22张志铁 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
张志铁
Publication Date
2009-07-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a soft soil foundation method combined with double vacuum preloading and dynamic compaction, which is suitable for land reclamation or low-lying land filling projects in which large-area soft soil is reinforced and its elevation is raised by dredging and filling mud. It includes the following process steps: Low-level vacuum preloading: first build cofferdams, dredge and fill the mud layer at a certain elevation, lay geotextiles and bamboo layers, insert plastic drainage boards vertically, lay vacuum horizontal pipe networks, install vacuum preloading systems and blow Mud seal layer, mud seal layer thickness 0.8 ~ 1.5m, vacuum preloading system vacuum preloading; high vacuum well point dewatering: high vacuum well point dewatering system is arranged on the mud seal layer, first vacuum dewatering, well point pipe is removed ; Low-energy dynamic compaction: lay a layer of filler on the mud seal layer, and perform the first pass of low-energy dynamic compaction; after 2 to 3 rounds of "high vacuum well point precipitation-low-energy dynamic compaction"; vibration rolling, leveling the site. The invention realizes the simultaneous treatment of the soft soil foundation and the mud layer raised by dredging filling, and the treated site has high degree of consolidation, short consolidation period and high strength after consolidation.
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Description

Technical field:

[0001] The invention relates to a comprehensive reinforcement method for large-area soft ground. Suitable for silt, silt soil foundation. It is especially suitable for land reclamation or low-lying land filling projects where a large area of ​​soft soil is reinforced and its elevation is raised by dredging and filling mud. Background technique:

[0002] With the reform and opening up, construction land is becoming more and more scarce. For this reason, land reclamation is generally carried out in various coastal areas. These beaches not only have low bearing capacity, but also have a low ground elevation. According to the traditional method, sand blowing and earth-rock filling are required first. Consolidate the soft soil foundation and backfill materials on the beach. The traditional method is not only expensive, but also has a long construction period and seriously damages the ecological environment, which is not conducive to sustainable development. In...

Claims

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