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Sleeve connection device for bored cast-in-place pile construction

A technology of bored piles and casings, applied in sheet pile walls, foundation structure engineering, construction, etc., which can solve the high matching requirements between steel casings and long auger drills, inflexible pile diameter design, and inability to achieve micro-disturbance and other problems, to achieve the effect of good practical effect, simple structure and easy operation

Active Publication Date: 2012-10-24
中铁二十四局集团上海铁建工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Benoy method and the rotary casing method use the punching method to remove the soil in the casing, which is used in the close construction of the existing subway tunnel. The impact force of the punching bucket will have a great impact on the existing subway tunnel, which cannot For the purpose of micro-disturbance, and to prevent secondary disturbances to the existing tunnel when the casing is pulled out, in principle, the steel casing will not be pulled out. If the casing is not pulled out using the above two construction methods, the construction cost will be very high; The steel casing and the long auger of the double power head casing long auger construction method have high requirements for matching. When the steel casing is not pulled out, the cost is higher than the previous two methods, and the pile diameter design is not flexible; it can be seen that no matter the steel casing There are certain disadvantages when the pipe is pulled out of the soil or completely retained in the soil, so those skilled in the art are in urgent need of a steel casing device that can eliminate the defects of the prior art

Method used

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  • Sleeve connection device for bored cast-in-place pile construction
  • Sleeve connection device for bored cast-in-place pile construction
  • Sleeve connection device for bored cast-in-place pile construction

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: as Figure 1-8 As shown, the present invention relates to a casing connection device for the construction of partially casing bored piles, which is specifically used for the construction of casing bored piles in the short distance of existing subway tunnels. The casing connection device includes a recyclable casing 1. The connection steel cylinder 2 and the permanent sleeve 3; wherein the recyclable sleeve 1 and the connection steel cylinder 2 are fixedly connected by welding or rivets, etc., and the lower part of the connection steel cylinder 2 is processed with 4 grooves 4, and the permanent sleeve 3 4 steel sheet outer bumps 5 are welded on the top of the steel tube. When connecting, align the outer bumps 5 on the permanent sleeve 3 with the grooves 4 of the connecting steel cylinder 2 and insert them. When the outer bumps 5 on the permanent sleeve 3 top When connecting the top of the groove 4 of the steel cylinder 2, the recoverable sleeve 1 can be con...

Embodiment 2

[0037] Embodiment 2: as Figure 9 , 10 As shown, the recyclable casing 1 and the connecting steel cylinder 2 are fixedly connected by welding or rivets, and the connecting steel cylinder 2 is welded with 4 outer protrusions 7 of steel sheets, and 4 grooves are processed on the top of the permanent casing 3 6. When connecting, align the outer bump 7 on the connecting steel cylinder 2 with the groove 6 of the permanent sleeve 3 and insert it. When the outer bump 7 on the connecting steel cylinder 2 reaches the top of the permanent sleeve 3, place the The recoverable sleeve 1 can be connected by rotating it at an angle of about 18 degrees; The tube 1 is detached from the permanent sleeve 3 .

[0038] It can be seen from the above that the detachable fixing between the connecting steel cylinder 2 and the permanent sleeve 3 described in the present invention is not limited to the above two embodiments, and the connection between the steel cylinder 2 and the permanent sleeve 3 can...

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Abstract

The invention belongs to the field of foundation basis engineering, and particularly relates to a sleeve connection device for bored cast-in-place pile construction. The invention is particularly used for short-distance sleeve bored cast-in-situ pile construction for existing subway tunnels. The scheme is as follows: the sleeve connection device comprises a recyclable sleeve, a connection steel cylinder and a permanent sleeve, wherein the recyclable sleeve is fixedly connected with the top of the connection steel cylinder in a welding or rivet mode, and the bottom of the connection steel cylinder is detachably fixed with the top of the permanent sleeve. The invention can implement connection and disconnection between the permanent sleeve and the recyclable sleeve, thereby saving the construction cost for short-distance sleeve bored cast-in-situ pile construction for existing subway tunnels. The sleeve connection device is convenient for processing and easy to operate, and has the advantages of simple structure and favorable practical effect.

Description

[0001] technical field [0002] The invention belongs to the field of foundation engineering, and in particular relates to a casing connection device used for bored pile construction. Background technique [0003] The construction process of conventional mud retaining bored piles is as follows: drilling machine in place→drilling→slurry injection→continue drilling→slag discharge→hole cleaning→hanging reinforcement cage→shooting water to clean the bottom→pour concrete→pile top Reinforcement, this kind of construction technology, due to the release of soil stress around the hole wall during the hole forming process, the soil is more likely to move toward the center of the hole, and even the hole wall collapses or shrinks. When constructing near an existing subway tunnel, it is inevitable It will cause large displacement and deformation of the subway tunnel, which will seriously affect the operation safety of the train and bring difficulties to the maintenance and repair of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/66E02D5/38
Inventor 王志刚向科黄大维黄耀东汤明方杨钱峰
Owner 中铁二十四局集团上海铁建工程有限公司