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Salt pond soft foundation vacuum joint preloading drainage consolidation processing method

A technology of combined stacking and drainage consolidation, applied in infrastructure engineering, soil protection, construction, etc., can solve the problems of affecting the normal progress of the project, large amount of engineering, long period, etc., to improve the quality of the construction project and save the project. The effect of fewer processing costs and fewer construction steps

Active Publication Date: 2015-02-04
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a large amount of engineering, high cost and long cycle, which greatly affects the normal progress of the project.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, a method of vacuum combined surcharge preloading and drainage consolidation treatment of salt pond soft foundation, the steps are as follows:

[0019] (1) Remove the water and silt in the salt pond, and keep the upper hard saline-alkali sheet; after smoothing, lay a 50cm-thick medium-coarse sand layer directly on the saline-alkali sheet, and the fineness modulus of the medium-coarse sand is 2.3-3.7;

[0020] (2) Lay plastic drainage boards on the medium-coarse sand layer and lay water filter pipes; lay woven geotextiles on the medium-coarse sand layer, and the woven geotextiles are laid according to the specification of 200 g / m2. Lay 2 layers of sealing film, and then vacuumize through the set water filter pipe, the vacuum degree is 80Kpa, and repair the leaking part during the vacuuming process until the vacuum degree is stable;

[0021] (3) Lay non-woven fabric on the sealing film, and the non-woven fabric is laid according to the specification of 300 g...

Embodiment 2

[0024] Embodiment 2, a method of vacuum combined surcharge preloading and drainage consolidation treatment of salt pond soft foundation, the steps are as follows:

[0025] (1) Remove the water and silt in the salt pool, and keep the upper hard saline-alkali sheet; after smoothing, lay a 70cm-thick medium-coarse sand layer directly on the saline-alkali sheet, and the fineness modulus of the medium-coarse sand is 2.3-3.7;

[0026] (2) Lay plastic drainage boards on the medium-coarse sand layer and lay water filter pipes; lay woven geotextiles on the medium-coarse sand layer, and the woven geotextiles are laid according to the specification of 200 g / m2. Lay 2 layers of sealing film, and then vacuumize through the set water filter pipe, the vacuum degree is 90Kpa, and repair the leaking part during the vacuuming process until the vacuum degree is stable;

[0027] (3) Lay non-woven fabric on the sealing film, and the non-woven fabric is laid according to the specification of 300 g...

Embodiment 3

[0030] Embodiment 3, a method of vacuum combined surcharge preloading and drainage consolidation treatment of salt pond soft foundation, the steps are as follows:

[0031] (1) Remove the water and silt in the salt pool, and keep the upper hard saline-alkali sheet; after smoothing, lay a 60cm-thick medium-coarse sand layer directly on the saline-alkali sheet, and the fineness modulus of the medium-coarse sand is 2.3-3.7;

[0032] (2) Lay plastic drainage boards on the medium-coarse sand layer and lay water filter pipes; lay woven geotextiles on the medium-coarse sand layer, and the woven geotextiles are laid according to the specification of 200 g / m2. Lay 2 layers of sealing film, and then vacuumize through the set water filter pipe, the vacuum degree is 85Kpa, and repair the leaking part during the vacuuming process until the vacuum degree is stable;

[0033] (3) Lay non-woven fabric on the sealing film, and the non-woven fabric is laid according to the specification of 300 g...

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Abstract

The invention discloses a salt pond soft foundation vacuum joint preloading drainage consolidation processing method which comprises the following steps of: clearing the water and sludge in a salt pond, and reserving the upper hard salt and alkali sheet layer; paving a middle coarse sand layer with thickness of 50-70cm on the salt and alkali layer; arranging a plastic drainage plate on the middle coarse sand layer, and paving a water filter pipe; paving woven geotextile on the middle coarse sand layer, paving two layers of sealing films on the woven geotextile, and then vacuumizing until the vacuum degree is stable; paving non-woven fabric on the sealing films; covering the non-woven fabric with a limestone layer; vacuumizing and draining, wherein the vacuum degree is 80-90Kpa; and at the time of vacuumizing, performing layered loading of mountain field macadam, wherein the thickness of each layer of loading is 1-1.5m. The method disclosed by the invention has simpler and more reasonable design and strong operability, can improve the foundation strength of the engineering, saves cost, accelerates construction and is easy to implement; and moreover, the method has relatively great practical significance and high practical values, and can better guarantee the using quality of the port engineering and public infrastructure.

Description

technical field [0001] The invention relates to a method for treating soft foundations of salt ponds, in particular to a method for consolidating the soft foundations of salt ponds with vacuum combined surcharge preloading and drainage. Background technique [0002] Seawater salt ponds are the infrastructure for salt production near the sea. At present, many areas are reusing abandoned salt ponds to develop port infrastructure, improve the investment environment, and become new port land resources. For the soft foundation of coastal salt pans, the first layer is generally clay, and the second layer is silt, which is mainly silt within 20m, with high water content, high compressibility, low strength, and poor water permeability. Considerable settlement and settlement differences will occur under load. [0003] For the consolidation treatment and land utilization of abandoned salt ponds, there is no systematic method established in the prior art. Deep excavation and replacem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/10
Inventor 张永宏王挺高公略王文宇
Owner HUAIHAI INST OF TECH
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