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Sand wrapped gravel pile construction method

A technology of sand-coated gravel pile and construction method, which is applied in basic structure engineering, soil protection, construction and other directions, can solve the problems of large settlement and large number of drainage holes, and achieves environmental protection, good effect, and construction. handy effect

Active Publication Date: 2015-06-24
CHINA CHEM ENG SECOND CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above technology has a large number of drainage holes, and the settlement of the pile body after being stressed is relatively large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] 1. Preparation of site operation conditions: first ensure the "three links and one leveling" and "temporary establishment" of the construction site, and review the intact rate of machinery and tools and the amount of construction materials on site, test and detect equipment, long auger drilling rigs, machinery and construction machinery in place and in good condition Rate.

[0025] 2. The drill pipe follow-up type body-wrapped gravel pile construction machine tool disclosed in Chinese utility model patent No. 2012201198001 is used to vibrate and compact the graded crushed stone and sand-mixed gravel loaded into the civil engineering cloth bag.

[0026] Ingredients: graded gravel 1600kg / m 3 ; Sand 600kg / m 3 .

[0027] The particle size of the graded gravel is 3-5cm; the particle size of the sand is 0.1-5mm;

[0028] The operation steps of the present invention are: dry stirring the graded crushed stone and sand to make them fully mixed. Wrapped in a geotextile bag to...

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PUM

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Abstract

A sand wrapped gravel pile construction method is suitable for processing foundation with high water content and saturated salt marsh soil with undrained shear strength within 10-20kPa. Sand wrapped gravel piles are distributed in afull regular triangle shape, diameter of each gravel pile is 325mm to 530mm, length of each gravel pile is 6 to 8m, distance between the gravel piles is 3 to 4 times of the diameter of the gravel piles, ingredients are selected from 1600kg / m<3> graded broken stones and 600kg / m<3> sand, grain size of each of the graded broken stones is 3-5cm, grain size of the sand is 0.1-5mm, and the graded broken stones and the sand are mixed into stone-sand materials which are wrapped in geotechnical cloth bags to vibrate and dense. The sand wrapped gravel pile construction method is convenient in construction, economic and reasonable in materials, advanced in technology, safe and practical, composite in bearing capacity, good in effect, and environmental-friendly.

Description

technical field [0001] The invention is suitable for the treatment of saturated saline soil foundation with high water content and undrained shear strength of 10-20KPa. For example, the saline soil in the eastern salt lake area of ​​the Qaidam Basin (Chaerhan) is mostly silty clay and silt, saturated in plastic to soft plastic state, thixotropic, and the natural foundation bearing capacity is only 60-80kPa saline soil bagged gravel pile composite foundation. Background technique [0002] At present, the bagged gravel pile composite foundation in the domestic composite foundation treatment technology was proposed by the Institute of Geotechnical Engineering of Zhejiang University (formerly the Geotechnical Teaching and Research Office) in 1987. Reinforcement method. The hole diameter is 80cm, but it has not been applied in actual engineering. After that, the Geotechnical Engineering Teaching and Research Office of Fuzhou University adopted a self-made simple water injector...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/08
Inventor 信建强荣兆斌
Owner CHINA CHEM ENG SECOND CONSTR