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SMW piles, SMW pile supporting structures and SMW pile supporting structure construction method

A technology of supporting structures and construction method piles, which is applied in the direction of foundation structure engineering, excavation, construction, etc., can solve the problems of destroying the integrity of the pile body, reducing the ability of SMW construction method piles to stop water and resist earth pressure, etc., so as to ensure the integrity , enhance safety and stability, and reduce the risk of deformation and collapse

Inactive Publication Date: 2020-07-28
CHANGZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, removing the cement-soil consolidation on the outside of the profiled steel will inevitably destroy the integrity of the cement-soil mixing pile (or high-pressure rotary grouting pile) and reduce the ability of the SMW construction method pile to stop water and resist soil pressure

Method used

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  • SMW piles, SMW pile supporting structures and SMW pile supporting structure construction method
  • SMW piles, SMW pile supporting structures and SMW pile supporting structure construction method
  • SMW piles, SMW pile supporting structures and SMW pile supporting structure construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example is a foundation pit with a depth of 9m. SMW engineering method pile internal support is used for foundation pit support. One cement-soil pile 2 inserts one H700×300 steel, such as figure 1 As shown, the pile length of the cement-soil pile 2 is 16m, and the crown beam is set on the pile top of the SMW pile, and the foundation pit is supported by two horizontal internal supports. The first internal support is a reinforced concrete internal support, and the first The inner support in the road is located at the crown beam of the pile top of the cement-soil pile 2, and the second inner support is a steel pipe support (that is, the support structure 7) (the diameter of the active joint at the support end is φ400mm), the support point is 5m away from the pile top, and a steel fence Purlin 6, the width (L5) of the purlin 6 is 500mm. When installing the purlin 6 of the second internal support, in order not to damage the cement-soil consolidation on the outside of th...

Embodiment 2

[0031] This example is a foundation pit with a depth of 7m. SMW engineering method piles are used to support the foundation pit. Cement and soil pile 2 insert a H700×300 steel, such as figure 1 As shown, the pile length of the cement-soil pile 2 is 13m, and the crown beam is set on the pile top of the SMW pile, and the foundation pit is supported by a prestressed anchor rod (support structure 7), (anchor hole diameter φ130mm, anchor rod The total length is 17m, of which the length of the anchoring section is 11m), the action point of the anchor rod 7 is 4m away from the top of the pile, and the horizontal distance between the anchor rods 7 is 1.5m, (that is, two piles and one anchor rod), and 200 channel steel double The surrounding purlin 6 is formed, and the height of the surrounding purlin 6 is 400mm. When installing the surrounding purlin 6 of the anchor rod 7, in order not to damage the cement-soil consolidation outside the H-shaped steel 1, it is used on the H-shaped ste...

Embodiment 3

[0036] This example is a foundation pit with a depth of 12m. SMW engineering method pile internal support is used for foundation pit support. Cement soil pile 2 inserts a H800×300 type steel 1, such as figure 1 As shown, the pile length of the cement-soil pile 2 is 19m. A crown beam is set on the pile top of the SMW construction method pile. The foundation pit is supported by three horizontal internal supports. The first internal support is a reinforced concrete internal support. The support in the road is located at the crown beam of the pile top of the cement-soil pile 2. The second and third inner supports are φ609mm steel pipe supports (the support structure 7 is a support rod) (the diameter of the active joint at the support end is φ450mm), and the second support The point is 5m away from the pile top, and the third support point is 9m away from the pile top. Steel purlins 6 are used. The width of the purlins 6 is 550mm. When installing the second and third steel support ...

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Abstract

The invention discloses SMW piles, SMW pile supporting structures and an SMW pile supporting structure construction method, and relates to the technical field of building deep foundation pit engineering. The piles comprise H-shaped steel, cement soil piles and arc-shaped steel sheets; the arc-shaped steel sheets are arranged on the outer sides of flange plates; the H-shaped steel is vertically arranged in the cement soil piles in the length directions of the flange plates; and the arc-shaped steel sheets are connected with enclosing purlins in a foundation pit, the enclosing purlins are connected into the foundation pit through supporting structures, and after small amount of cemented soil solidified bodies on outer side of H-shaped steel is stripped, the enclosing purlins can be tightly connected with the arc-shaped steel sheets and the H-shaped steel. According to the piles, the structure is simple and practical, the integrity of pile bodies of the SMW piles is ensured, the safety and stability of foundation pit supporting are enhanced, the risk of deformation and collapse is reduced, and the taken-down arc-shaped steel sheets can be repeatedly used, so that the cost is reduced,and the popularization and application value is achieved.

Description

technical field [0001] The invention relates to the technical field of building deep foundation pit engineering, in particular to an SMW construction method pile, a supporting structure and a construction method thereof. Background technique [0002] In recent years, with the rapid development of the economy and the acceleration of urbanization, the vigorous development of urban high-rise buildings, subways and various underground projects, the scale of underground space development has become larger and larger, and a large number of deep foundation pit projects have emerged. Depths between 6 and 30m are common. In order to ensure the safety of the existing buildings around the foundation pit and strictly control the deformation of the rock and soil mass of the supporting slope, it is required to take support measures for deep foundation pits. SMW piles are a relatively common support form as a support structure. The SMW construction method pile (also known as steel cement-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 代国忠李书进史贵才李雄威施维成
Owner CHANGZHOU INST OF TECH