Method for reinforcing composite vacuum prepressing soft soil foundation

A soft soil foundation and vacuum technology, which is applied in the field of soft soil foundation reinforcement and large-area deep soft soil foundation reinforcement. The effect of preloading time, increasing permeability coefficient, and increasing tamping energy

Inactive Publication Date: 2008-03-26
郁玫 +1
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Problems solved by technology

For the vacuum preloaded foundation with plastic drainage boards inserted, after the drainage and exhaust channels are set, it is only suitable for the permeability coefficient ≥ 10 -5 cm/s site works, but has no effect on the consolidation of silt with a smaller permeability coefficient;
[0006] 2. Vacuum preloading needs to lay a 500mm sand cushion on the ground as a horizontal drainage layer, but in actual construction, it cannot be realized because mechanical equipment cannot en

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  • Method for reinforcing composite vacuum prepressing soft soil foundation

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Example Embodiment

[0040] Example 1: As shown in Figure 1, a composite vacuum preloading soft soil foundation reinforcement method includes two parts: vacuum preloading precipitation and electroosmosis precipitation. The construction steps are as follows:

[0041] a) Level the site and establish a site drainage system; including a horizontal drainage system and a vertical drainage system. The horizontal drainage system consists of a blind drainage ditch, a horizontal vacuum tube 4 and a collection well. The vertical drainage system consists of a plastic drainage board and a vertical drainage system. The negative electrode 2 is composed.

[0042] Insert the plastic drainage board 1 on the treatment site. The minimum distance between the plastic drainage boards is 1m×1m, and the arrangement is plum blossom. The plastic drainage boards must use high-performance plastic drainage boards to ensure the mechanical strength required for smooth vacuum. The filter membrane adopts tensile strength High geotexti...

Example Embodiment

[0050] Embodiment 2: A method for strengthening soft soil foundation with composite vacuum preloading. The method includes vacuum preloading and electroosmosis precipitation. The construction steps are as follows:

[0051] a) Level the site and establish a site drainage system; including a horizontal drainage system and a vertical drainage system. The horizontal drainage system is composed of blind drainage ditch, horizontal vacuum pipes and water collection wells. The vertical drainage system is composed of plastic drainage boards and positive and negative drainage systems. Electrode composition.

[0052] Insert plastic drainage boards on the treatment site. The minimum spacing of the plastic drainage boards is 1m×1m, and they are arranged in a plum blossom shape. The plastic drainage boards must be made of high-performance plastic drainage boards to ensure the mechanical strength required for smooth vacuum. The filter membrane adopts high tensile strength. Geotextile to ensure s...

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Abstract

The composite vacuum pre-pressing soft foundation stabilizing process with vacuum pressing precipitation and electroosmosis precipitation includes the following steps: 1. establishing a site draining system, arranging a vacuum electroosmosis device, and setting a vacuum pressing sealing layer on the ground; 2. turning on the vacuum pump for vacuum pressing precipitation; 3. activating the circuit for vacuum electroosmosis precipitation; and 4. turning off the vacuum electroosmosis device and the vacuum pump after reaching the consolidation degree of 85 % and performing the post ground treatment and further stabilizing. The present invention combines vacuum pressing precipitation and electroosmosis precipitation to reach high consolidation degree of the soft foundation and shorten the construction period.

Description

technical field [0001] The invention relates to a foundation reinforcement method, in particular to a foundation reinforcement method for large-area deep soft soil, which is suitable for flowing mud, silt, and silty soil foundations, especially for soft soils with high bearing capacity but general deformation requirements. Soil foundation reinforcement. Background technique [0002] In construction projects, we often encounter some soft soil or soft soil layer with high water content. This kind of soil is characterized by high water content, high compressibility, low strength and poor water permeability. For this kind of foundation, especially for large areas Construction, such as building docks, airports, roads and houses on the foundation, requires treatment and reinforcement of the foundation. There are many methods for strengthening soft soil foundation, such as composite foundation, vacuum preloading method, vacuum electroosmotic dewatering method, etc. [0003] Vacuu...

Claims

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Application Information

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IPC IPC(8): E02D3/10E02D3/11
Inventor 朱怡郁玫
Owner 郁玫
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