Sectional steel pulling-out method for SMW construction method pile

A technology of construction method piles and I-shaped steel, which is applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of stirring wall cracking and pulling up section steel efficiency, and achieve the effect of ensuring speed, improving work efficiency, and ensuring consistency

Inactive Publication Date: 2019-12-31
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for pulling out SMW pile-shaped steel in order to solve the problems of cracking of the mixing wall and low efficiency of pulling out the steel when the SMW construction method pile-shaped steel is pulled out in the prior art

Method used

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  • Sectional steel pulling-out method for SMW construction method pile
  • Sectional steel pulling-out method for SMW construction method pile
  • Sectional steel pulling-out method for SMW construction method pile

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Embodiment Construction

[0030] This embodiment further describes the present invention in detail in conjunction with the accompanying drawings.

[0031] figure 1 It is a schematic diagram of PVC sleeve wrapping I-shaped steel. Among them, 1 is I-shaped steel; 2 is PVC sleeve; 3 is grouting pipe. Such as figure 1 As shown, grouting pipes with the same length as the I-shaped steel web are left at the four corners of the I-shaped steel web; the surface of the I-shaped steel is covered with a PVC sleeve with the same inner cavity shape as the outer surface of the I-shaped steel The unit length of the I-shaped steel is welded into a whole, and the PVC sleeve is connected by an adhesive to wrap the entire I-shaped steel and the grouting pipe. The I-shaped steel needs to be 20-30 cm higher than the PVC pipe.

[0032] figure 2 is a schematic diagram of a cement-soil mixing pile, wherein 4 is a cement-soil mixing pile.

[0033] image 3 It is a schematic plan view of the I-shaped steel and PVC sleeve i...

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Abstract

The invention discloses a sectional steel pulling-out method for a SMW construction method pile. The method comprises the following steps: wrapping a layer of PVC sleeve pipe with a shape which is thesame as the shape of the outer surface of I-shaped sectional steel for stirring construction in the length direction of the outer surface of the I-shaped sectional steel; after the stirring construction is concluded, locating a crane in place, then connecting a hook crane with a hoisting hole of the I-shaped sectional steel and pulling out the I-shaped sectional steel, starting to grout through reserved grouting pipes, and realizing the synchronization of the pulling-out for the I-shaped sectional steel and the grouting. According to the method, the PVC sleeve with the shape which is the sameas the shape of the I-shaped sectional steel is adopted for wrapping the I-shaped sectional steel and inserted into a stirring pile with the I-shaped sectional steel, so that the instability of pulling resistance for the I-shaped sectional steel is avoided; with the adoption of the synchronization of the pulling-out for the I-shaped sectional steel and the grouting, a pressure on the bottom surface of the PVC sleeve, of the grouting and an upward pulling force on the I-shaped sectional steel, of the crane, friction resistance between the PVC sleeve and the I-shaped sectional steel is overcome, and the I-shaped sectional steel can be smoothly pulled out; and moreover, due to the existence of the PVC sleeve, the section of a space after the sectional steel is pulled out can be stabilized. The method is applicable to other sectional steel of the SMW construction method pile.

Description

technical field [0001] The invention relates to a method for removing pile-shaped steel by the SMW construction method, which belongs to the technical field of foundation pit engineering. Background technique [0002] The SMW construction method is to use special multi-axis mixing to drill and cut the soil on the spot. At the same time, inject the cement slurry into the soil at the end of the drill bit. Before the mixture is hardened, insert H-shaped steel or other profiles into the mixing pile body to form a continuous, complete, and seamless underground continuous wall with certain strength and rigidity. This wall can be used as the foundation pit for underground excavation Soil retaining and watertight structures. [0003] With the rapid development of modern urbanization, ground resources are increasingly scarce, which highlights the importance of underground space excavation. The development of underground space is accompanied by various foundation pit support and cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D9/02
CPCE02D9/02
Inventor 徐长节丁海滨占永杰徐立明童立红阮呈尚
Owner EAST CHINA JIAOTONG UNIVERSITY
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