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Special-shaped section support pile closed type enclosure system and construction method thereof

A technology of special-shaped section and enclosure system, which is used in excavation, infrastructure engineering, construction, etc., can solve the problems of low flexural rigidity and flexural bearing capacity, and high cost of closed water-stop curtain engineering, so as to improve the cross-section resistance. The effect of bending bearing capacity, environmental protection and project cost reduction

Inactive Publication Date: 2016-01-13
CHINA STATE CONSTRUCTION ENGINEERING CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a closed enclosure system of special-shaped cross-section support piles and its construction method. High technical problems, as well as high groundwater level areas, the high cost of setting up closed water-stop curtains and other defects, but also provide an economical and applicable form of enclosure structure for deep foundation pit engineering in areas with strict deformation control

Method used

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  • Special-shaped section support pile closed type enclosure system and construction method thereof
  • Special-shaped section support pile closed type enclosure system and construction method thereof
  • Special-shaped section support pile closed type enclosure system and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment one sees Figure 1-2 As shown, this kind of closed enclosure system of special-shaped cross-section support piles is arranged along the periphery of the foundation pit. The side A in the figure is the side facing the pit, and the side B is the side facing the soil. This closed enclosure system of special-shaped cross-section support piles includes a row of special-shaped cross-section support piles 1 and cement-soil piles 2 alternately spaced and occluded into a closed type. The special-shaped cross-section support piles 1 are reinforced concrete pouring piles, which bear The water and soil pressure is composed of the web 1.1 perpendicular to the side wall of the foundation pit, the occlusal flange 1.2 on the side facing the pit parallel to the side wall of the foundation pit, and the flange 1.3 on the side facing the soil parallel to the side wall of the foundation pit.

[0036] The height m of the cross section of the web 1.1 along the direction perpendicul...

Embodiment 2

[0040]Embodiment two see Figure 3-4 As shown, the difference from Example 1 is that the web 1.1 is divided into the front abdomen 1.1a protruding from the outer edge of the pit-side occlusal flange 1.2 and the front abdomen 1.1a located at the pit-side occlusal flange 1.2 and the pit-face The rear web 1.1b between the soil side flanges 1.3, the width of the pit-facing side occlusal flange 1.2 along the direction parallel to the foundation pit side wall is smaller than the width of the soil-facing side reinforcing flange 1.3 along the direction parallel to the foundation pit side wall, so that the front web Plate 1.1a, pit-facing side occlusal flange 1.2, rear web 1.1b and soil-facing side flange 1.3 form a special-shaped cross-section support pile with a soil-shaped cross section. The height m' of the cross section of the rear web 1.1b along the direction perpendicular to the side wall of the foundation pit is greater than the width n' of the cross section of the rear web 1.1...

Embodiment 3

[0042] Embodiment three see Figure 5-6 As shown, different from Embodiment 1 and Embodiment 2, the width of the engaging flange 1.2 on the side facing the pit along the direction parallel to the side wall of the foundation pit is greater than the width of the strengthening flange 1.3 on the side facing the soil along the direction parallel to the side wall of the foundation pit, so that The front web 1.1a, the occlusal flange 1.2 on the pit-facing side, the rear web 1.1b and the soil-facing side flange 1.3 form a special-shaped cross-section support pile with a Z-shaped cross section.

[0043] The construction method of the special-shaped cross-section support pile closed enclosure system of the above embodiment, the construction steps are as follows:

[0044] Step 1. According to the hydrogeological conditions of the proposed site and the excavation depth of the foundation pit, the calculation and analysis of the closed enclosure system is carried out, the form of the suppor...

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Abstract

The invention provides a special-shaped section support pile closed type enclosure system. The special-shaped section support pile closed type enclosure system is formed in the mode that special-shaped section support piles are engaged with and in lap joint with cement piles on the two sides on the two sides through flanges. The special-shaped section piles are filling piles with the sections shaped like a Chinese character 'tu' or 'gong' or 'shi'. The special-shaped section support piles bear water-earth pressure and serve as support piles of a foundation pit project, and water sealing of the integrated closed type enclosure system is formed by closing the space between the support piles through the cement piles. The support piles in the enclosure system can be the filling piles with the sections shaped like a Chinese character 'tu' or 'gong' or 'shi' and with high flexural rigidity and high flexural capacity. Compared with traditional support piles with the round sections, the overall rigidity of the support system is increased remarkably, the displacement of the foundation pit is reduced, and the manufacturing cost of the project is reduced. According to the special-shaped section support pile closed type enclosure system, the space between the support piles is closed by the cement piles, additional closed type water sealing curtains are not needed, and the manufacturing cost of the project is reduced remarkably.

Description

technical field [0001] The invention relates to a closed foundation pit enclosure system and a construction method thereof, in particular to an enclosure system and a construction method of a special-shaped cross-section support pile with relatively high bending rigidity. Background technique [0002] The current deep foundation pit engineering is mostly based on deformation control. The section bending stiffness and bearing capacity of the envelope structure are important factors that restrict the support performance of the support structure system, and are also important factors that affect the project cost. Increasing the bending stiffness of the enclosure structure can reduce the deformation of the support system, which is beneficial to the environmental protection around the foundation pit. Under the condition of the overall rigidity requirements of the specific support system, the increase of the bending stiffness of the enclosure structure is to reduce the support anch...

Claims

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Application Information

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IPC IPC(8): E02D17/04
Inventor 秦会来油新华曹荣夏马庆松耿冬青许国光杨春英张清林马程昊宋福渊郭恒胡贺祥张伟
Owner CHINA STATE CONSTRUCTION ENGINEERING CORPORATION
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