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A gravel-variable cross-section pile composite structure with drainage and anti-sliding functions and its construction method

A technology of variable cross-section piles and composite structures, which is applied in foundation structure engineering, excavation, sheet pile walls, etc., can solve the problems of no drainage effect, weakened shear and bending strength, etc., and achieve the effect of reducing construction costs and speeding up construction progress

Active Publication Date: 2018-11-27
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the anti-sliding piles in the existing landslide treatment projects: either the drainage performance is good but the shear and bending strength of the pile are weakened; or the strength requirements of the pile are guaranteed, but there is no drainage effect

Method used

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  • A gravel-variable cross-section pile composite structure with drainage and anti-sliding functions and its construction method
  • A gravel-variable cross-section pile composite structure with drainage and anti-sliding functions and its construction method
  • A gravel-variable cross-section pile composite structure with drainage and anti-sliding functions and its construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment discloses a gravel-variable cross-section pile composite structure with drainage and anti-sliding functions, including: a reinforced concrete variable cross-section pile 1 implanted in a landslide body 11 .

[0043] see figure 2 , the reinforced concrete variable-section pile 1 includes a small-section pile 101 and a large-section pile 102 . The large-section pile 102 is arranged at the bottom of the small-section pile 101 . The small-section pile 101 and the large-section pile 102 are integrated. The reinforced concrete variable cross-section pile 1 has the main reinforcement 1031 of the pile body and the spiral stirrup 1032 of the pile body. The main reinforcement 1031 of the pile body and the spiral stirrup 1032 of the pile body together form a reinforcement cage 103 .

[0044] see figure 1 , image 3 and Figure 4 , the small-section pile 101 and the large-section pile 102 are both round piles. The pile diameter ratio of the small-section pil...

Embodiment 2

[0052] This embodiment discloses a gravel-variable cross-section pile composite structure with drainage and anti-sliding functions, including: a reinforced concrete variable cross-section pile 1 implanted in a landslide body 11 .

[0053] The reinforced concrete variable-section pile 1 includes a small-section pile 101 and a large-section pile 102 . The large-section pile 102 is arranged at the bottom of the small-section pile 101 . The small-section pile 101 and the large-section pile 102 are integrated. The reinforced concrete variable cross-section pile 1 has the main reinforcement 1031 of the pile body and the spiral stirrup 1032 of the pile body. The main reinforcement 1031 of the pile body and the spiral stirrup 1032 of the pile body together form a reinforcement cage 103 .

[0054] see Figure 5 and Figure 6 After the large-section pile 102 passes through the sliding surface 12, it is embedded in the stable bedrock 13 below, and the embedding depth meets the requir...

Embodiment 3

[0063] This embodiment discloses a construction method of the gravel-variable cross-section pile composite structure with drainage and anti-sliding functions described in Embodiment 1, including the following steps:

[0064] 1) Prefabricated reinforced concrete variable section pile 1.

[0065] 2) According to the geological conditions, excavate the pile hole to the design depth. The diameter of the pile hole is x, and the diameter of the large section pile 102 is y. Among them, x-y=20~50mm.

[0066] 3) Lay gravel drainage cushion 8 at the bottom of the pile hole.

[0067] 4) Lift the reinforced concrete variable section pile 1, align the pile position, adjust the verticality of the reinforced concrete variable section pile 1, and then put the reinforced concrete variable section pile 1 into the pile hole to the design elevation.

[0068] 5) The design position of the pile hole is surrounded by the geotextile 6, and the reverse filter layer 502 is applied layer by layer.

...

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Abstract

The invention provides a gravel-non-uniform pile composite structure with drainage and skid resistance functions and a construction method thereof. The gravel-non-uniform pile composite structure comprises a prefabricated reinforced concrete non-uniform pile, a peripheral gravel water collecting and draining ring and a pile bottom gravel cushion layer. The reinforced concrete non-uniform pile comprises a lower large-section pile body and an upper small-section pile body. The large-section pile body penetrates through a sliding face and is embedded into stable bed rock. The small-section pile body is wrapped by the gravel water collecting and draining ring. Gathered underground water in a slope can seep into the pile bottom gravel cushion layer. The construction method of the gravel-non-uniform pile composite structure includes the steps of prefabrication of the non-uniform pile, excavating of a pile hole, laying of the pile bottom gravel cushion layer, filling of the gravel water collecting and draining ring, and the like. According to the gravel-non-uniform pile composite structure, the stability of the slope is improved by comprehensively considering the two aspects of skid resistance and drainage, an effective support structure type is provided for prevention and treatment of underground water and rainfall induced landslide disasters, and construction of the structure is rapid and convenient.

Description

technical field [0001] The invention relates to the fields of rock-soil retaining structure and slope treatment, in particular to a composite structure for slope support and a construction method thereof. Background technique [0002] Geological disasters occur frequently in my country, among which landslide disaster is one of the most important geological disasters. Factors related to groundwater, such as rainfall and reservoir water level changes, are one of the main causes of landslide disasters. About 70% of landslide hazards are related to rainfall and groundwater activities. In addition, there is a type of landslide that is significantly affected by groundwater activities in my country, that is, the horizontal push landslide. For example, the large landslide in Xuanhan County, Dazhou City, Sichuan Province in 2004 and the very famous Wanzhou Heping Square landslide group in the Three Gorges Reservoir area are both horizontal push landslides. In order to prevent land...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/20E02D5/48
CPCE02D5/48E02D17/207
Inventor 黄达石林岑夺丰宋宜祥陈福勇
Owner CHONGQING UNIV
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