Reinforcement method of soft foundation

A soft foundation and filling technology, applied in soil protection, infrastructure engineering, construction, etc., can solve problems such as broken piles, necking, restrictions, etc., and achieve the effects of low cost, improved compactness, and reduced post-construction settlement.

Inactive Publication Date: 2019-11-12
福建鼎拓工程勘察设计有限公司 +2
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  • Claims
  • Application Information

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Problems solved by technology

According to the calculation of Rankine earth pressure, the soil pressure increases with the depth, and the soil pore water pressure increases during the construction of vibratory compaction sand piles, which is very easy to cause engineering acc

Method used

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  • Reinforcement method of soft foundation
  • Reinforcement method of soft foundation
  • Reinforcement method of soft foundation

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Embodiment 1

[0061] To reinforce a newly pushed and filled weak foundation, the geological conditions of the weak foundation are as follows from top to bottom:

[0062] ①-1 layer of plain fill: grayish-yellow, brownish-yellow, loose, slightly dense in some places, slightly wet to saturated, mainly for site leveling and backfill, mainly composed of cohesive soil, containing a small amount of sand, and recently piled Filling, self-weight consolidation has not been completed; only drill holes ZK400 and ZK401 have been exposed in this phase of the site, and the revealed thickness is 3.50-6.30m, with an average thickness of 4.90m;

[0063] ①-2 layers of sand filling: grey-yellow, brown-yellow, loose, slightly wet; mainly for site leveling and backfilling, mainly gravel sand, for recent landfilling, and self-weight consolidation has not been completed; according to the results of particle analysis, the particle size The particle content of 2.00-20.0mm is about 31.6%, the particle content of part...

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Abstract

The invention provides a reinforcement method of a soft foundation, and belongs to the technical field of civil engineering. The reinforcement method of the soft foundation comprises the steps that atube well precipitation system is arranged for performing precipitation; primary material-filling pile-forming is carried out at a sand pile point; and secondary material-filling pile-forming is carried out at the position point of the primary material-filling pile-forming. According to the reinforcement method of the soft foundation, during the primary material-filling pile-forming and the secondary material-filling pile-forming, a soil body produces squeezing action and shock excitation and disturbance action, so that most of free water and combined water in the soil body on the periphery ofthe sand pile point is discharge into a precipitation tube well, the influence of the water pressure part in the soil pressure is reduced, the precipitation tube well can further be used as a quick release channel for excess pore water pressure generated by underlying deep silt after the disturbance, an excess pore water pressure value caused by the soil body disturbance is effectively reduced, and engineering quality accidents such as pike breaking and necking down are fundamentally solved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for strengthening weak foundations. Background technique [0002] At present, the coastal area adopts the dredging filling method to achieve the purpose of reclamation from the sea, and the foundation reinforcement treatment is 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 buried depth is as high as 20m, and the soil will generate a large excess static pore water pressure under the condition of vibration excitation. According to the calculation of Rankine earth pressure, the soil pressure increases with the depth, and the soil pore water pressure increases during the construction of vibratory compaction sand piles, which is very easy to cause engineering accidents such as broken piles and necking. There are many failure cas...

Claims

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Application Information

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IPC IPC(8): E02D3/10E02D3/08
CPCE02D3/08E02D3/10
Inventor 黄留新刘宝田嵇国强邵长波郭育宝马飞陆海葛鹏殷宝兵刘敬峰
Owner 福建鼎拓工程勘察设计有限公司
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