Sand cushion-free pre-compacting water-draining consolidation method for soft soil foundation

A sand-free cushion, drainage consolidation technology, applied in the direction of basic structure engineering, soil protection, construction, etc., can solve the problems of extended construction period, inability to enter the site for construction, and prone to subsidence of mechanical equipment, so as to save construction costs, The effect of shortening the construction period

Inactive Publication Date: 2006-09-27
CCCC FOURTH HARBOR ENG CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many land reclamation projects. In the Pearl River Delta and the Yangtze River Delta, due to the increasingly tight supply of well-graded medium-coarse sand and the rising price, the cost of pre-pressing drainage consolidation method to strengthen soft foundation is getting higher and higher.
Moreover, due to the low bearing capacity of the soft soil foundation, especially the soft soil layers such as coastal silt and newly dredged silt, the water content is high, and the ultimate bearing capacity is low. It cannot be implemented normally, and mechanical equipment cannot enter the site for construction due to subsidence, which prolongs the construction period

Method used

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  • Sand cushion-free pre-compacting water-draining consolidation method for soft soil foundation
  • Sand cushion-free pre-compacting water-draining consolidation method for soft soil foundation
  • Sand cushion-free pre-compacting water-draining consolidation method for soft soil foundation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The following are the construction steps of this technology:

[0017] 1. Determine the insertion depth of the plastic drainage board according to the thickness of the soft soil layer and the design requirements of the project, and at the same time use the applicable silt insertion machine 7 according to the bearing capacity of the foundation. Such as figure 1 As shown, the mud inserting machine 7 is composed of walking equipment and a pile frame. The walking equipment is modified from an amphibious excavator 71, and the pile frame 72 is made by welding angle steel. The model of the excavator is based on the bearing capacity of the mud surface and the height of the pile frame. Considering other factors comprehensively, the pile frame can be assembled by itself.

[0018] 2. According to the design requirements, select the corresponding drainage board model, and use bamboo sticks or waste drainage board cores to stake out. The layout of the drainage board 8 can be plum-s...

Embodiment 2

[0023] After completing steps 1 to 4 as in Example 1, carry out surcharge preloading construction.

[0024] After the 6 rows and columns of the horizontal drainage pipelines are connected, surcharge construction is carried out on it. The surcharge is applied in layers and compacted in layers. The first layer of surcharge uses loose materials such as stone powder to avoid damage to the drainage board and drain pipes.

Embodiment 3

[0026] After completing steps 1 to 4 as in Example 1, carry out vacuum combined surcharge preloading construction. After vacuuming and constant loading for about 10 days, carry out heaping construction on the sealing film 4 . In order to protect the sealing film 4, a layer of non-woven geotextile is firstly laid on it, and fine particle materials such as silt and fine sand are used as the first-stage stockpiling material, and the stockpiling is filled in layers and compacted in layers.

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Abstract

The invention discloses a soft ground non-sand pre-compress water discharge solidifying method, which comprises following steps: a, arranging sample on the soft ground, and vertically inserting plastic discharge plate; b, laying horizontal water discharge tubes which are connected to the spanner of discharge plate that near the ground, while one row plates are relative to one discharge tube. The invention can replace traditional rough sand, to solidify the soft ground in variable conditions, even without sand. The invention can reduce the cost and time.

Description

technical field [0001] The invention relates to the technical field of foundation treatment in the field of civil engineering, in particular to the technical field of preloading drainage consolidation method construction. Background technique [0002] The preload drainage consolidation method mainly includes the surcharge preload method and the vacuum preload method, both of which require vertical drainage strips and horizontal drainage cushions. The most widely used vertical drainage belt is the plastic drainage board. The horizontal drainage cushion is medium-coarse sand cushion or pebble cushion. At present, there are many land reclamation projects. In the Pearl River Delta and Yangtze River Delta, due to the increasingly tight supply of well-graded medium-coarse sand and the rising price, the cost of pre-pressing drainage consolidation method to strengthen soft foundation is getting higher and higher. Moreover, due to the low bearing capacity of the soft soil foundatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/10E02D27/28
Inventor 董志良郑新亮戚国庆
Owner CCCC FOURTH HARBOR ENG CO LTD
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