Large-area soft foundation reinforcement pile body quick-drainage method

A technology with weak foundation and large area, which is applied in the field of fast drainage of large-area weak foundation reinforcement piles, can solve the problems of unsatisfactory effect and unsatisfactory improvement of soil physical and mechanical indicators, and achieve the effect of expanding the effective range of precipitation and large permeability coefficient Effect

Pending Publication Date: 2020-11-17
福建鼎拓工程勘察设计有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the effect is not ideal, and the physical and mechanical indicators of the soil around the pile are not ideally improved

Method used

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  • Large-area soft foundation reinforcement pile body quick-drainage method
  • Large-area soft foundation reinforcement pile body quick-drainage method
  • Large-area soft foundation reinforcement pile body quick-drainage method

Examples

Experimental program
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Effect test

Embodiment 1

[0058] For large-area weak foundations, light well point pipes (PVC pipes with a diameter of 32mm) are installed on the completed vibratory compaction sand piles.

[0059] Drill holes on the pipe wall of the light well point pipe to form a water filter hole (the water filter hole is set at the soil permeability coefficient K≤10 -4 Above the soil layer), the diameter of the filter hole is 10mm, and the hole spacing is 100mm. The length of the filter hole is set according to the geological conditions around the pile body, and it is mainly set in the soil layer with a small permeability coefficient. For interlayer soil, it can be set. Compartment design according to the location of the interlayer.

[0060] After the water filter hole is completed, wrap 3 layers of 100-mesh nylon filter mesh in the water filter hole part, and tie the nylon filter mesh tightly with iron wire; the part without filter hole does not need to be wrapped with a filter mesh.

[0061] Make concrete well p...

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Abstract

The invention provides a large-area soft foundation reinforcement pile body quick-drainage method, and belongs to the technical field of foundation treatment. According to the large-area soft foundation reinforcement pile body quick-drainage method, a light well point pipe is mainly used for reducing the water content of soil around a pile body, and when quick drainage is achieved at the buried depth of the light well point pipe, the hyperstatic pore water pressure generated by vibration of the soil is quickly released; and the quick-drainage pile body is vacuumized, certain negative pressureis generated on the soil around the pile body, under the action of the negative pressure, the mucky soil around the pile body shrinks towards the pile body, thus the consolidation degree of the soil is enhanced, and under the action of the multiple effects, the physical and mechanical indexes such as the porosity, the water content and the compression modulus of the soil can be changed.

Description

technical field [0001] The invention relates to the technical field of foundation treatment, in particular to a method for quickly removing large-area weak foundation reinforcement piles. Background technique [0002] At present, the dredging reclamation method is used in coastal areas to achieve the purpose of reclamation from the sea, and the foundation reinforcement treatment is often carried out by laying vibratory compaction sand piles. Due to the complex ground conditions of the dredging reclamation site, especially the deep silt in the underlying layer, the silt The buried depth is up to 20m, and under the condition of vibration excitation and disturbance, the excess static pore pressure of the soil mass is large. According to the calculation of Rankine earth pressure, the soil pressure increases with the depth, and the soil pore water pressure increases due to the vibration disturbance of the soil during the construction of vibratory compaction sand piles, which is v...

Claims

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Application Information

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IPC IPC(8): E02D3/10
CPCE02D3/10E02D3/106E02D2300/0007E02D2300/0017E02D2300/0029
Inventor 马飞郭育宝陆海叶凝雯吴凯
Owner 福建鼎拓工程勘察设计有限公司
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