Ultra-deep T-shaped trench-wall pile in soft-toped hard-bottomed soil layer and trench forming method

A construction method and trough construction technology, applied in the field of building foundation engineering, can solve problems such as high cost, save materials and costs, reduce post-construction settlement and horizontal displacement, and reduce project cost.

Inactive Publication Date: 2012-07-11
CCCC FOURTH HARBOR ENG CO LTD +1
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Problems solved by technology

[0017] It can be seen that, for the construction of ultra-deep T-shaped groove wall piles under the condition of upper soft and lower hard soil layers, in order to make up for the shortage of ultra-deep T-shaped groove wall pile groove construction technology using hydraulic grab bucket machine, the double Wheel milling machine for groove construction, the cost is quite expensive

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  • Ultra-deep T-shaped trench-wall pile in soft-toped hard-bottomed soil layer and trench forming method
  • Ultra-deep T-shaped trench-wall pile in soft-toped hard-bottomed soil layer and trench forming method
  • Ultra-deep T-shaped trench-wall pile in soft-toped hard-bottomed soil layer and trench forming method

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Embodiment Construction

[0051] The technical solution of the present invention will now be specifically described with a specific embodiment.

[0052] The shoreline of the second phase project of a coastal wharf has a total length of 1,200m, and the water depth at the front of the wharf is -17.5m (chart datum), which are four deep-water berth wharfs capable of berthing a new generation of super post-Panamax container ships. The ground elevation of the project site is 2.30-3.0m. The engineering strata are mainly sand and clay sediments of the Tertiary Miocene and marine sediments of the Quaternary Pliocene. The main soil layers are distributed from top to bottom: loose surface backfill Medium-fine sand and gravel, silty clay, interbedded silt-fine sand and silty silty clay, silty-fine sand, silty clay, plastic clay, fine-medium sand. On the whole, the stratum is relatively complex. The thickness of the upper backfilled loose soil layer, soft plastic muddy soil layer and silty sand layer is up to 45m, ...

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Abstract

The invention discloses an ultra-deep T-shaped trench-wall pile in a soft-toped hard-bottomed soil layer and a trench forming method. The trench forming method includes the steps: firstly, pre-reinforcing soft soil at each external corner of a T-shaped trench wall; secondly, digging a guide wall foundation pit, treating the extremely soft soil layer at the bottom area of a guide wall to lead the bearing capacity of the foundation bottom of the guide wall to be larger than or equal to 100kPa; and thirdly using the trench forming way of 'drilling and gripping'. By the method, trench forming efficiency can be improved greatly, cost is lowered, and evident economy is achieved.

Description

technical field [0001] The invention belongs to the field of building foundation engineering, and in particular relates to the technical field of pile foundations and trench-forming construction methods. Background technique [0002] The groove wall pile is formed by adopting the underground diaphragm wall forming process to form a rectangular cross-section pile as the foundation form of buildings and structures, and bears the load of the superstructure. Compared with conventional bored piles and prefabricated pile foundations, groove wall piles have the characteristics of high vertical bearing capacity and high rigidity, and can flexibly adjust the horizontal stiffness of the foundation according to the wall layout, and can replace conventional bored piles in engineering applications , Prefabricated pile foundation, directly used as the single pile or group pile foundation of the building. [0003] Groove wall piles have been greatly developed and widely used in foreign co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D17/04E02F5/02E02D5/36
Inventor 周翰斌荣劲松刘天云陈日胜陈米林治平
Owner CCCC FOURTH HARBOR ENG CO LTD
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