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High vacuum variable energy cross soft foundation treatment method

A variable energy, high vacuum technology, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of long construction period, many construction steps, easy to be discharged, etc., and achieve the effect of saving construction time.

Inactive Publication Date: 2005-04-27
徐士龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from this that there are many construction steps, and the construction period is still relatively long, generally 25 to 30 days.
[0004] 2. Since the suction hole on the wall of the vacuum tube and the filter cloth around the suction hole are only arranged in the lower half of the thickness required for each soil layer to be treated, and In the upper half of the vacuum tube wall, there are no air extraction holes and peripheral filter cloths. In this way, the parts where the air extraction holes are arranged, that is, the water in the lower layer of the thickness required for each treated soil layer, are easily discharged, and the parts where the air extraction holes are not arranged. That is to say, the water in the upper layer of the required treatment thickness of each treated soil layer is not easy to be discharged, so that it is easy to form a difficult-to-handle "spring soil" during compaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The soft soil foundation of a storage yard is reinforced. Soil layer structure: the surface layer is dredged sand about 2m thick, the second layer is silty clay about 2m thick, and the third layer is silty soil about 10-13m thick. The design requires that the bearing capacity of the foundation within 10m should be increased from an average of 50-60kpa to 130kpa, and the uneven settlement should be less than 1 / 600. For this reason, the soft foundation is cross-processed by "three times the surface layer, the second layer and the third layer are divided into three layers and directly inserted into high-vacuum tubes with different spacings to evacuate and three times variable energy densification":

[0014] The first step, the first time to insert vacuum tubes First, insert the first batch of vacuum tubes directly into the bottom of the surface blow-fill sand layer in an array. The vacuum tube insertion depth is 2m, and the distance between vacuum tubes is 3.5m×6m. On the...

Embodiment 2

[0025] Soft soil reinforcement of a certain road. Soil layer structure: the surface layer is silty clay with a thickness of about 2m and a water content of 45%. The second layer is muddy soil with a thickness of about 10-13m, a water content of 60%, and a permeability coefficient of 1.4×10 -7 cm / s. The design requires that the bearing capacity of the foundation within 6m be increased from an average of 30-40kpa to 80kpa. For this reason, the soft foundation is cross-processed by "three times of shallow and deep layered direct array insertion of high vacuum tubes with different spacing and three times of variable energy densification":

[0026] The first step, the first time to insert the vacuum tubes. First, insert the first batch of vacuum tubes directly into the bottom of the silty clay layer on the surface. The depth of the vacuum tubes is 2m, and the distance between the vacuum tubes is 3.5m×4.5m. The upper and lower parts of the vacuum tube wall section of the first la...

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Abstract

The present invention features that according to the lamination case of soft foundation to belongs to treated, especially the water content and osmosis coefficient in different layers, the construction method including inserting vacuum tube to different layers, draining water and strong ramming or vibrating to densify are adopted. The present invention has low construction cost and high construction quality.

Description

Technical field: [0001] The invention relates to a soft soil foundation reinforcement treatment method, in particular to a soft soil foundation method of "several times, layered high vacuum synchronous drainage and several times variable energy densification intersecting treatment", which belongs to the technical field of soft soil foundation treatment . Background technique: [0002] Because the soil layer structure of the treated soft soil foundation is relatively complex, the soil quality of the surface layer and the second and third layers are different, and the water content and permeability coefficient of each soil layer are also different. The traditional soft soil foundation is generally processed by "high vacuum densification method". "High vacuum densification method" is a new construction method for quickly strengthening soft ground. It is to directly insert the vacuum tubes into each treated soil layer of the soft soil foundation several times, and then vacuumi...

Claims

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Application Information

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IPC IPC(8): E02D3/046E02D3/10
Inventor 徐士龙
Owner 徐士龙
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