Construction method for jointing of steel reinforcement cages of reinforced concrete drilling bored concrete pile

A technology for bored piles and reinforced concrete, which is applied to sheet pile walls, infrastructure engineering, construction, etc., can solve the problems of unguaranteed joint quality, slow construction speed, and complicated operation, and achieves good economic benefits and fast construction speed. , the effect of speeding up the docking speed

CN101886386AInactive Publication Date: 2010-11-17CHINA RAILWAY SIXTH GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-11-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the field of drilling bored concrete pile construction, in particular to a construction method for jointing of steel reinforcement cages of a reinforced concrete drilling bored concrete pile. The construction method solves the problems of unwarranted joint quality, complicated jointing operation, time and energy waste, low construction speed and the like of conventional steel reinforcement cage jointing. The construction method comprises the following steps of: 1) performing rolling and straight thread processing on bar ends of the steel reinforcement cage; 2) manufacturing the steel reinforcement cage in a segmented way by using a steel reinforcement cage bar joint jointing precision control device; and 3) positioning the lower segment of the steel reinforcement cage in a hole, adjusting the levelness of a lower joint end face first, hoisting the upper segment of the steel reinforcement cage in place, adjusting the verticality, aligning all main bars of the upper and lower segments of the steel reinforcement cages in positions and pressing against the ends next, and screwing sleeves of the main bar ends of the upper segment of the steel reinforcement cage downwards on the main bar ends of the lower segment of the steel reinforcement cage at last to realize the jointing of the upper and lower steel reinforcement cages. The construction method guarantees the bar joint quality, has high steel reinforcement cage joint performance and high construction speed, reduces piling time, saves cost on machine team and the like and shortens the construction period.
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Description

technical field

[0001] The invention relates to the construction field of bored piles, in particular to a butt joint construction method for reinforced concrete bored piles with reinforcement cages. Background technique

[0002] Reinforced concrete cast-in-place piles are currently widely used in foundation treatment projects for housing construction, railways, highway bridges and culverts, and municipal engineering. Among them, the reinforced concrete cast-in-place piles used in the design of railways, highways and municipal bridges and culverts have large pile diameters, large main reinforcement diameters, and relatively large steel bars. Due to the characteristics of high density and long pile body, the weight and length of the reinforced cage made at one time are relatively large, which makes it very difficult to install the reinforced cage at one time, and the safety risk during hoisting is large. Therefore, the construction of longer reinforced cages is generally It ad...

Examples

Embodiment Construction

[0024] A reinforced concrete bored pile reinforcement cage butt joint construction method comprises the following steps:

[0025] 1) Rolling straight thread processing of steel bar end of steel cage

[0026] Grind the ends of the steel bars that need to be connected to be smooth, and then use a grinding wheel cutting machine or a grinding machine, and then process the rolling straight thread. The processing length and tooth angle of the straight thread are matched according to the selected straight thread sleeve. , where the end of the reinforcement cage needs to be docked, the processing length of the straight thread at the end of the reinforcement cage in the upper section is the length of the straight thread sleeve 7, and the processing length of the straight thread at the connection end of the reinforcement cage in the lower section is 1 / 2 straight thread Sleeve length, when processing straight threads, reserve 1 to 2 wires for the thread length; the main reinforcement of ...