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Construction method of cast-in-place pile

A construction method and cast-in-place pile technology, which are applied to sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of large mud discharge, low construction efficiency and high construction cost, and achieve high single pile bearing capacity and pile forming speed. Fast, low-noise effects

Inactive Publication Date: 2018-06-01
BEIJING NO 5 CONSTR ENG GRP
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  • Description
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Problems solved by technology

[0006] The disadvantage is that due to the use of mud wall protection, the amount of mud discharge is large, and it is easy to cause mud pollution on the construction site; in addition, the construction efficiency is low and the construction cost is high

Method used

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  • Construction method of cast-in-place pile

Examples

Experimental program
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Embodiment

[0053] Take the implementation of a pipe gallery in Beijing as an example. The construction method uses the open construction method, and the groove depth is 8-10 meters. It is a dangerous sub-item project and requires strict selection of foundation pit support methods.

[0054] Engineering, hydrogeological conditions:

[0055] The project is located in Tongzhou District. The engineering geological conditions of the construction site are relatively simple. The stratum deposition age and genetic type are divided into three types: artificial accumulation layer, recent sediment layer and Quaternary sediment layer, and according to stratum lithology and its physical and mechanical properties It is divided into 5 large layers and sub-layers according to engineering characteristics, which are described as follows:

[0056] Ⅰ Artificial accumulation layer (the first large layer)

[0057] The surface layer distribution of the proposed site is generally 0.40~1.70m thick artificially piled plai...

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Abstract

The invention provides a construction method of a cast-in-place pile. The construction method includes: using a full screw earth auger to drill a construction site; performing bottom cleaning after apreset depth is reached; lifting a drill pipe, and using a concrete pump to grout concrete to the bottom of the hole through the inner cavity of the drill pipe and the discharge outlets of a drill bit; taking out the drill pipe, and placing into a reinforcement cage. The construction method is free of slurry pollution, fast in construction, high in construction efficiency and low in cost.

Description

Technical field [0001] The invention belongs to the field of construction, and more specifically, relates to a construction method of a cast-in-place pile. Background technique [0002] The existing cast-in-place piles include vibration sinking pipe cast-in-place piles and mud wall-protected cast-in-place piles. [0003] The construction process of the vibratory sinking cast-in-place pile is: 1. Start the vibrating hammer and sink the pile pipe to the design depth; 2. Lower the steel cage in the pile pipe to the design elevation; 3. Put concrete into the pile pipe; 4. Pull the pipe into a pile . [0004] The disadvantage is that when the local foundation soil contains a thick sand layer, the vibrating immersed pipe cannot pass through the sand layer; and the vibrating hammer has a large power and is located on the top of the pile pipe. There is a lot of noise during construction. Construction in the urban area There are great difficulties; in addition, the vibration sinking bored p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/36
CPCE02D5/36
Inventor 赵强汪洋刘兵张小帅
Owner BEIJING NO 5 CONSTR ENG GRP
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