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Energy-saving and environment-friendly bored pile construction method

A technology of bored piles and construction methods, which can be applied to sheet pile walls, foundation structure engineering, construction, etc., and can solve problems such as collision with hole walls, shaking of steel cages, and construction difficulties, so as to improve energy conservation and environmental protection, and increase the lower speed , to reduce the effect of collision

Active Publication Date: 2018-12-11
江苏地基工程有限公司
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Problems solved by technology

[0004] Generally, the longitudinal frame is a steel cage, but when the steel cage is inserted, the steel cage often shakes and collides with the hole wall, resulting in difficulties in construction

Method used

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  • Energy-saving and environment-friendly bored pile construction method

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Embodiment

[0040] An energy-saving and environment-friendly bored pile construction method, such as figure 1 , including the following steps,

[0041] Step 1. Excavate and bury the casing, and put the drilling rig in place. The inner diameter of the casing should be 200-400mm larger than the diameter of the pile. When the drilling rig starts drilling, it should drill at a slow speed. After the drill bit has completely entered the formation, it can speed up the drilling. During the construction of the drilling rig, it should be ensured that the mud surface should not be lower than the bottom of the casing of the drilling rig to ensure the stability of the hole wall; the mud is provided by the mud in the mud circulation system; at this time, the mud circulation system reduces the discharge of mud in the drill hole to the construction site, This further affects the environment of the construction site. In addition, when there is a lack of mud in the borehole, the mud circulation system prov...

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Abstract

The invention discloses an energy-saving and environment-friendly bored pile construction method, relates to the field of bearing pile construction and solves the technical problem of shaking during the process of lowering a steel reinforcement cage. The key point of the technical scheme of the energy-saving and environment-friendly bored pile construction method is that the construction method includes the steps of: (1) excavating and burying pile casings and making drilling rig in place, drilling slowly when the drilling rig drills and accelerating the drilling after all drill bits enter theformation, ensuring that the mud surface is not lower than the bottom of a drill casing during the construction of the drilling rig, and using the mud provided in a mud circulation system during construction; (2) carrying out the first hole cleaning immediately after the hole is formed with a slag removal cylinder of the drilling rig adopted for hole cleaning; (3) lowering the steel reinforcementcage, and placing a limit device for restricting the swing of the steel reinforcement cage on the ground during the process of lowering the steel reinforcement cage; (4) lowering a conduit and conducting the second hole cleaning; (5) pouring concrete; (6) pulling out the pile casings; (7) cutting off pile heads. The energy-saving and environment-friendly bored pile construction method has the advantage of reducing the swing of the steel reinforcement cage during the process of lowering the steel reinforcement cage.

Description

technical field [0001] The invention relates to the field of bearing piles in the construction field, in particular to an energy-saving and environment-friendly construction method for bored piles. Background technique [0002] At present, in the field of construction, the various properties of the foundation are directly related to the overall stability and safety of the superstructure, as well as the convenience of use. In some areas with poor foundation soil, especially soft soil areas, it is often necessary to Improvement or replacement of the foundation soil, or when excavating the foundation pit, it is necessary to support the soil around the foundation pit. The technologies commonly used in foundation treatment and foundation pit support include: bored piles, etc. [0003] The Chinese patent with the notification number CN104746512A discloses a cement-soil-strength composite pile, which includes a cylindrical pile body formed by mixing cement and soil. There is a co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38E02D15/08
CPCE02D5/38E02D5/385E02D15/08
Inventor 周曙东周芳陈家冬尚学伟周浩达
Owner 江苏地基工程有限公司
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