CFG (cement flyash gravel) Pile composite foundation structure and construction method

A composite foundation and foundation technology, applied in foundation structure engineering, sheet pile walls, buildings, etc., can solve problems such as construction difficulties, achieve high construction efficiency, low investment, and avoid plane deviation

Pending Publication Date: 2019-01-25
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a CFG pile composite foundation structure to effectively reduce the cost of composite foundation, improve construction efficiency, and overcome the technical problems of traditional CFG pile cap construction difficulties

Method used

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  • CFG (cement flyash gravel) Pile composite foundation structure and construction method
  • CFG (cement flyash gravel) Pile composite foundation structure and construction method
  • CFG (cement flyash gravel) Pile composite foundation structure and construction method

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Embodiment

[0044] For a foundation reinforcement project, the lateral reinforcement width of the foundation is 48m, the reinforcement longitudinal length is 3200m, and the CFG piles are arranged in a square shape with a spacing of 1.6m. The original designed pile cap section size is 1.0m wide, 1.0m long, and 0.6m thick; when frame lattice beams are used, the lattice beam section dimensions are 0.3m wide, 0.3m thick; the unit price of pile cap reinforced concrete is 1500 yuan / m 3 , The unit price of frame lattice beam reinforced concrete is 2000 yuan / m 3 , labor costs 500 yuan / day.

[0045] (1) Comparison of engineering material costs

[0046] 1. Pile cap scheme:

[0047] (1) Number of pile caps: (48 / 1.6+1)×(3200 / 1.6+1)=62031 pieces

[0048] (2) Number of pile cap reinforced concrete: 62031×(1.0×1.0×0.6)=37218.6m 3

[0049] (3) Material cost of pile cap: 37218.6×1500=55827900 yuan

[0050] 2. Frame lattice beam scheme:

[0051] (1) Frame lattice girder longitudinal beam reinforce...

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Abstract

A CFG (cement flyash gravel) pile composite foundation structure is intended to effectively reduce manufacture cost of a composite foundation, improve construction efficiency and solve the technical difficulties in traditional CFG pile cap construction. The CFG pile composite foundation structure comprises CFG piles arranged in a foundation at intervals in crisscross manner, as well as a prefabricated frame lattice beam buried below the foundation surface; the prefabricated frame lattice beam is composed of transverse beams arranged at intervals in longitudinal direction and longitudinal beamsarranged at intervals in transverse direction; the junctions of the transverse and longitudinal beams are integrally connected to form joints; pile bodies of the CFG piles are positioned below the joints respectively; the CFG piles are connected with the prefabricated frame lattice beam via connection structures and connection members at the tops of the piles.

Description

technical field [0001] The invention relates to geotechnical engineering, in particular to a CFG pile composite foundation structure and a construction method. Background technique [0002] CFG pile (cement fly ash gravel pile) is a variable strength pile with certain strength made of gravel, stone chips, sand, fly ash mixed with cement and water to form a mixture, and made by various pile forming machines. CFG piles are widely used in foundation reinforcement. The diameter of CFG piles is usually small, generally not more than 0.5m, and the pile body is made of gravel, stone chips, fly ash mixed with cement and water, and its engineering investment is low. , so it is widely used in foundation reinforcement with a huge scale. [0003] In order to effectively improve the pile-soil stress ratio of CFG piles in composite foundations, pile caps with enlarged heads are usually set on the top of CFG piles. Since the pile cap is constructed after the CFG pile has reached the desi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/46E02D27/00
CPCE02D5/46E02D27/00
Inventor 姚裕春刘会娟张敏静刘彬张耀袁报肖朝乾薛元封志军
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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