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Method for reinforcing soft ground by combining vacuum preloading and surcharge vibration rolling

A combined surcharge and soft foundation technology, applied in soil protection, foundation structure engineering, construction, etc., can solve the problems of inconvenient pile machine construction, long construction period, high cost, etc., and achieve improved foundation structure performance and loading speed Quickly, the effect of improving the bearing capacity of the foundation

Inactive Publication Date: 2013-01-23
CHINA CONSTR FOURTH ENG DIV
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AI Technical Summary

Problems solved by technology

While the load of surcharge preloading is relatively large, but its construction period is long, requiring a large amount of preloading materials
If CFG piles, square piles and composite double-layer overhead slabs are used, it is not convenient for pile machine construction, and the construction period is longer and the cost is higher

Method used

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  • Method for reinforcing soft ground by combining vacuum preloading and surcharge vibration rolling

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Experimental program
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Effect test

Embodiment Construction

[0011] 1. Measurement and setting out

[0012] Use wooden stakes or small bamboo poles and white lime to release the exact position of the edge of each reinforcement unit, and use red paint on the wooden stakes or small bamboo poles, and mark the elevation of the top surface of the sand cushion; red paint can also be used between the wooden stakes and small bamboo poles. Nylon cord connection.

[0013] 2. Plug and play plastic drainage board

[0014] First of all, the site leveling is carried out, according to the thickness of the soft soil layer, layering conditions, in-situ test data, and vacuum construction capacity (the vacuum preloading specification generally stipulates that it is 10,000 to 20,000 m) 2 Divide the overloaded preloading area for a residential area, remove the surface cultivated soil and silt, and level the site.

[0015] Then, insert and drill the drainage vertical board, position according to the design and layout of the plastic drainage board, and then...

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Abstract

The invention discloses a method for reinforcing a soft ground by combining vacuum preloading and surcharge vibration rolling. The method comprises the following steps of: inserting a vertical draining plate, paving a medium-coarse sand cushion layer, digging a sealing ditch, and simultaneously, paving a horizontal draining pipe; and paving a horizontal water filtering pipe in the medium-coarse sand cushion layer, paving a vacuum film on the medium-coarse sand cushion layer, backfilling the sealing ditch, setting a measurement mark, arranging a vacuum pump, performing pressure stabilization after the vacuum pressure below the vacuum film reaches 85 kPa, performing backfilling by using pond residues, performing surcharge preloading, finishing surcharge preloading after a control requirement is met, and compacting soil on the surface layer through impaction and vibration rolling. Compared with the prior art, the method has the advantages that the soft ground is reinforced by combining vacuum preloading and surcharge vibration rolling, so that the original ground processing method through vacuum preloading or surcharge vibration rolling can be effectively improved, the cost of a ground processing project can be reduced, a construction period is shortened, and great significance is provided for improving the structural performance of the ground and the ground bearing capacity.

Description

technical field [0001] The invention relates to the technical field of soft ground treatment in the construction of large-scale workshops, in particular to a method for strengthening soft ground by vacuum preloading combined with surcharge vibration rolling. Background technique [0002] At present, with the continuous development of the economy, the construction land in coastal areas has been continuously reduced, which has led to an increase in the use of tidal wetlands. For the construction of large-scale factories on tidal wetlands, traditional foundation treatment methods are not suitable for such areas. regional use. For example, the load of vacuum preloading is fast and the construction period is short, but the load does not exceed 100Kpa, and the load is too small. The surcharge preloading load is relatively large, but its construction period is long, requiring a large amount of preloading materials. If CFG piles, square piles and composite double-layer overhead sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/046E02D3/10
Inventor 龙敏健陈静胡晓峰苗恩新倪俊
Owner CHINA CONSTR FOURTH ENG DIV
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