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Anchor pile type well foundation and construction technique thereof

A technology for foundation construction and caisson, which is applied in basic structure engineering, construction, etc., can solve the problems of high construction cost, unrecoverable, buried in soil, etc., and achieves the effect of shortening the construction period, fast construction, and reduced production cycle.

Inactive Publication Date: 2008-09-24
TIANJIN MUNICIPAL ENG DESIGN & RES INST
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Problems solved by technology

For areas with navigation or flood discharge requirements, the caps are often required to be set below the river bottom. The huge foundation brings a large amount of excavation work, and for long-span bridges, as the load increases, the pile foundation and caps need to be done. It is very large and the construction cost is high, and for the deep water foundation, it is still necessary to use a correspondingly large steel cofferdam to meet the construction requirements. After the construction is completed, a huge amount of steel cofferdams need to be dismantled, and some of them will be buried in the soil and cannot be recovered. cause a great deal of waste

Method used

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  • Anchor pile type well foundation and construction technique thereof
  • Anchor pile type well foundation and construction technique thereof

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing:

[0026] like figure 1 and figure 2 As shown, the present invention is an anchor pile type caisson foundation, which includes a foundation body, and a bored pile 2 is arranged below the foundation body. Bored piles are also called anchor piles. The bottom-sealing concrete 3 poured at the lower end of the caisson 1 is poured on the bored cast-in-situ pile 2 at the same time.

[0027] The caisson bottom-sealing concrete is poured on the bored piles, and the depth range of the bored piles extending into the bottom-sealing concrete should be 100~250mm. With this joint structure, the cross-sectional shape of the caisson and the horizontal inclination angle of the blade foot are the same as those of the conventional caisson foundation. However, the partition wall setting in the well should fully consider the construction space of the anchor pile. The arrangement of the anchor...

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Abstract

The invention discloses an anchor pile type caisson foundation, which includes a foundation body. A bore grouting pile is arranged below the foundation body. The invention also discloses a construction technique for an anchor pile type caisson foundation which includes the following steps: (1) sinking the caisson to a designed elevation; (2) drilling and grouting concrete in the caisson to form a bore grouting pile; (3) pouring bottom sealing concrete at the lower end of the caisson to carry out bottom sealing; (4) sealing the top part of the caisson. The invention fully optimizes the characteristics of the caisson foundation and a pile foundation; has a plurality of advantages and characteristics of reducing the construction cofferdams, reducing the project amount of the foundation, fastening the construction speed and having remarkable economic benefits; has extremely high popularization and application values.

Description

technical field [0001] The invention relates to a foundation of a bridge, in particular to an anchor pile type caisson foundation of a large bridge. The invention also relates to the construction technology of the foundation. Background technique [0002] The caisson foundation and the pile foundation are usually used in current engineering, and the two are used separately. The caisson foundation is a hollow well-shaped structure with upper and lower openings and blade feet, which is sunk into the water to the design level, and the wellbore is used as the structural shell to build the foundation. The caisson adopts reinforced concrete structure. During the construction, the first section of the wellbore shall be made on the spot, and then the soil shall be excavated in the wellbore by appropriate methods, so that the caisson will sink under the action of its own weight to overcome the resistance, and in the rocky area, the technology of blasting to aid sinking shall be use...

Claims

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Application Information

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IPC IPC(8): E02D27/20
Inventor 曹景孙立新刘旭锴张强朱涛康焯李明生关丽筠张宜松巩汉波
Owner TIANJIN MUNICIPAL ENG DESIGN & RES INST
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