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Positive and negative circulation construction technology of ultra-deep bored piles

A technology of bored piles and construction technology, which is applied in earthwork drilling, wellbore/well components, and flushing wellbore, etc. It can solve the problems of low hole-forming efficiency and unsatisfactory hole-forming quality of ultra-deep pile foundations, and achieve Improving construction efficiency and ensuring the quality of hole formation

Active Publication Date: 2012-11-21
SHANGHAI FOUND ENG GRP
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing bored pile construction method for the ultra-deep pile foundation, the hole-forming efficiency is low, the hole-forming quality is not ideal, and the technology cannot meet the existing construction quality requirements, the present invention provides an ultra-deep bored pile foundation , reverse cycle combined construction technology

Method used

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  • Positive and negative circulation construction technology of ultra-deep bored piles
  • Positive and negative circulation construction technology of ultra-deep bored piles
  • Positive and negative circulation construction technology of ultra-deep bored piles

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Embodiment Construction

[0018] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0019] Depend on figure 1 As shown, a super-deep bored cast-in-situ pile combined forward and reverse circulation construction technology, which specifically includes the following steps:

[0020] (1) Site layout preparation

[0021] In the construction site, the drilling rig 1 is in place, the casing 2 is buried, the drill pipe 3 and the drill bit 4 are connected, a mud pool including a circulation pool 8 and a sedimentation pool 9 is arranged on site, a mud pump 5 is inserted in the mud pool, and sand removal is set around it The machine 6 and the gravel pump 7 are connected to each other using conduits;

[0022] (2) Drilling of the positive circulation process in the upper clayey soil layer

[0023] Depend on figure 2 As shown, holes are formed, and the upper clayey soil layer is drilled by the positive circulation process. The mud pum...

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Abstract

The invention relates to a positive and negative circulation construction technology of ultra-deep bored piles. The positive and negative circulation construction technology specifically comprises the following steps of: (1) carrying out site layout preparation; (2) carrying out boring of upper viscous soil layer positive circulation process; (3) carrying out boring of lower viscous soil layer positive circulation process; (4) carrying out reverse circulating cleaning after pore-forming. The invention has the beneficial effects that: the construction technology is suitable for complicated geological conditions, construction efficiency is greatly increased, and pile bore quality is effectively ensured.

Description

technical field [0001] The invention relates to a building construction technology, in particular to a construction technology combining direct and reverse circulation of ultra-deep bored cast-in-place piles. Background technique [0002] With the development of super high-rise buildings and long-span bridges and other construction, transportation, and municipal engineering, the base load of the building is increasing, which puts forward higher requirements for the bearing capacity and deformation of the foundation. As it gets deeper, the geological conditions it faces become more and more complex, especially in soft soil areas, where the properties of the upper and lower soil layers are quite different. The original construction technology is difficult to meet the existing construction requirements, and the efficiency of hole formation is low. , The hole forming quality is not ideal. Therefore, there is a need for a new construction method for ultra-deep bored piles, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/00
Inventor 李耀良龚剑袁芬肖胜杰
Owner SHANGHAI FOUND ENG GRP
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