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Pile shell structure of rotary excavating pile

A technology of rotary excavation piles and pile shells, which is applied in the direction of foundation structure engineering, sheet pile walls, boreholes/well components, etc. It can solve the problems of easy falling into the bottom of rotary excavation pile holes, hidden dangers of foundation pile quality, etc., and achieve high strength , improve the pile quality, facilitate installation and transportation

Active Publication Date: 2013-05-22
CHINA METALLURGICAL CONSTR ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned problems existing in the prior art, the present invention combines the above-mentioned disadvantages of the rotary-dug pile, and proposes that after the rotary-dug pile hole is formed, a rotary-dug pile shell structure is arranged at the bottom to solve the problem of convenient manual or mechanical removal of the bottom of the rotary-dug pile. soft layer issues;
[0008] Further, the present invention also solves the problem that the loose soil in the upper loose soil layer in the rotary excavation pile hole is easy to fall into the bottom of the rotary excavation pile hole, causing hidden dangers to the foundation pile quality, and provides a new type of rotary excavation pile with a soil accumulation stop device shell structure

Method used

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  • Pile shell structure of rotary excavating pile
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  • Pile shell structure of rotary excavating pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: as figure 1 As shown, a pile shell structure of a rotary excavation pile includes a reinforcement cage 3 (the reinforcement cage in the prior art can be used), and at one end of the reinforcement cage 3 ( figure 1 The upper end of the middle reinforcement cage) is arranged with a straight pipe section 1 made of reinforced concrete (it can be round or square, and the shape of the reinforcement cage can be designed accordingly, that is, the overall pile shell structure of the upper rotary excavation pile can be circular or square. square). The lower end of the straight pipe section 1 is mated with the upper end of the steel cage 3 (it can be fixedly connected or detachably fixedly connected). Body structure (spliced ​​by several reinforced concrete pipes of equal or unequal length).

[0038] see figure 2 , the straight pipe section 1 is spliced ​​by several reinforced concrete pipes of equal or unequal length. The main reinforcement in the reinforced co...

Embodiment 2

[0044] Example 2: see Figure 4-6 , the soil accumulation stop device 2 includes: a skeleton 211 formed by a circular array of rod-shaped parts, the inner side (inner hole) of the skeleton and the straight pipe section are hinged by a hinge (movable connection can be used to ensure that the skeleton is free in the vertical direction) activities); the flexible protective material 212 arranged on the skeleton; the spring 213 arranged below each rod-shaped piece, the upper end of the spring is connected with the middle or outside of the rod-shaped piece, and the lower end is connected with the straight pipe section (the lower end is connected with the outer circumference of the straight pipe section, That is, a hoop can be preset on the outer circumference of the straight pipe section, the lower end of the spring is connected with the hoop, and the hoop can be an iron ring, etc.); the safety rope 214 arranged above each rod-shaped part, the lower end of the safety rope and the mid...

Embodiment 3

[0046] Example 3, see Figure 7 - Figure 8 , the soil accumulation stop device 2 includes an annular sealed inflatable bag 221, the inner side of the inflatable bag is connected with a straight pipe section, the inflatable bag is provided with a high-pressure air nozzle, and the high-pressure air nozzle is inflated through a high-pressure air pipe 222 and an air pump.

[0047] Specifically, the device is made of a closed inflatable bag, which is placed on the straight pipe section and firmly connected with the straight pipe section through a connecting belt (the connecting belt can be preset on the straight pipe section). When the inflatable bag is filled with high-pressure air and inflated, the gap between the outer wall of the straight pipe section and the hole wall is filled, and the friction between the inflatable bag and the hole wall prevents the hole wall from collapsing and the backfill soil from falling into the hole bottom to form sediment. The greater the air pres...

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Abstract

The invention discloses a pile shell structure of a rotary excavating pile. The pile shell structure of the rotary excavating pile comprises a reinforcement cage and a straight pipe section made of reinforced concrete, wherein one end of the straight pipe section is connected with one end of the reinforcement cage in a matched mode. The straight pipe section is formed by connecting 1 to 30 sections of reinforced concrete pipes, wherein each reinforced concrete pipe comprises a pipe body. A plurality of longitudinal bars and a plurality of stirrups are arranged inside each pipe body. A rebar connection structure which is used for positioning two adjacent pipe bodies and combining the two adjacent pipe bodies into an integral structure is arranged at one end or each of two ends of each pipe body. Due to the fact that the straight pipe section of the pile shell structure of the rotary excavating pile is formed by connecting each of the sections of the reinforced concrete pipes, the pile shell structure of the rotary excavating pile is not only convenient to transport and install, but also capable of correcting in the process that the reinforced concrete pipes are installed when a rotary excavating pile hole is deviated. The straight pipe section and an accumulated soil falling stopping device in the pile shell structure of the rotary excavating pile are capable of effectively preventing fallen soil of a loose soil layer from falling into the bottom portion of the pile hole and a formed pile, so that the quality of the formed file is improved. Meanwhile the accumulated soil falling stopping device further has the function of supporting the straight pipe section.

Description

technical field [0001] The invention relates to a rotary excavation pile shell structure, which belongs to the basic building material structure for building. [0002] Background technique [0003] In the foundation pile construction process of highways, railways, bridges and large buildings, the foundation pile construction method has undergone a process of continuous technological innovation from traditional manual excavation to mechanical rotary excavation pile construction. The traditional pile holes are manually excavated, and the diameter is enlarged at the bottom of the artificially excavated piles, which are called artificially excavated hole expansion piles. Due to their reliable mechanical performance, this type of pile does not require large-scale machinery and equipment, and the construction operation process is simple and can be directly inspected. Due to the rock and soil conditions at the bottom of the pile, the single pile has a high bearing capacity and no ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/66E21B27/00
Inventor 李智能魏奇科王龙李青枫
Owner CHINA METALLURGICAL CONSTR ENG GRP