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Method of using rotational multiaxial borehole pouring concrete occluding pile wall for enclosing deep foundation pit and slope protection project

A technology of occlusal piles and engineering, which is applied in the direction of foundation structure engineering, sheet pile walls, excavation, etc., to achieve the effect of speeding up construction, reducing project cost, and reducing cost

Inactive Publication Date: 2009-09-02
ZHEJIANG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the shortcomings of current methods in deep foundation pit enclosure and slope protection works, and provides a new enclosure method for high-depth excavation projects and slope protection projects such as multi-storey basement foundations and subway foundation pits. It has the advantages of strong side resistance, low cost, fast construction speed, simple construction equipment and methods, etc.

Method used

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  • Method of using rotational multiaxial borehole pouring concrete occluding pile wall for enclosing deep foundation pit and slope protection project
  • Method of using rotational multiaxial borehole pouring concrete occluding pile wall for enclosing deep foundation pit and slope protection project
  • Method of using rotational multiaxial borehole pouring concrete occluding pile wall for enclosing deep foundation pit and slope protection project

Examples

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Effect test

Embodiment 1

[0036] Embodiment 1: The internal support in multi-storey basement, subway or underground space excavation and other deep foundation pits combined with multi-axis drilling and pouring concrete occlusal protection pile wall enclosure method.

[0037] This enclosure structure is suitable for the excavation enclosure of various multi-storey basements, subways and underground spaces, and the specific implementation is to set multi-axis drilling and pouring concrete occlusal enclosure pile walls along the basement enclosure. This kind of retaining pile wall can be a method of pure rotatable multi-axis drilling and pouring surrounding retaining pile wall (Figure 4), or a method of cement-soil wall combined with rotatable multi-axis drilling and pouring concrete to occlude the retaining pile wall (Figure 5 ). According to the excavation depth, excavate from top to bottom while pouring each layer of reinforced concrete top beams or enclosure beams and supports to form a complete enclo...

Embodiment 2

[0038] Embodiment 2: The method of cantilever multi-axis drilling and pouring concrete occlusal pile wall enclosure in slope protection engineering.

[0039] This enclosure structure is suitable for mountain slope protection projects, and multi-axis drilling and pouring concrete occlusal enclosure pile walls are drilled along the slope protection axis. This kind of enclosure structure can be purely rotatable multi-axis drilling and pouring concrete to occlude the enclosure pile wall (Fig. 4), or it can be a method of cement-soil wall combined with rotatable multi-axis drilling and pouring enclosure retaining pile wall (Fig. 5) , so that a cantilever enclosure structure is formed, and reinforced concrete pressure beams are generally poured on the top of the enclosure pile wall to enhance the integrity of the enclosure structure. According to the plane distribution of the slope protection, the axis of the retaining pile wall can be a straight line, or it can be set in a circular...

Embodiment 3

[0040] Example 3: Multi-axis drilling and pouring concrete occlusal enclosure method with anchor rods in slope protection engineering This enclosure structure is also suitable for mountain slope protection engineering, and multi-axial drilling and pouring concrete occlusal is set along the slope protection axis Guard pile wall. This kind of enclosure structure can be purely rotatable multi-axis drilling and pouring concrete to occlude the enclosure pile wall (Fig. 4), or it can be a method of cement-soil wall combined with rotatable multi-axis drilling and pouring enclosure retaining pile wall (Fig. 5) . One or more rows of anchor rods are laid on the top and middle of the enclosure wall, and the anchor rods and the enclosure wall form a complete enclosure structure by using the reinforced concrete pressure beam on the top of the enclosure wall and the enclosure beam in the middle of the enclosure wall ( image 3 ). The axis of the pile wall can also be straight or arc-shap...

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Abstract

The invention relates to a novel method for enclosing a deep foundation pit and a slope protection project, such as a multi-storey basement and a subway. A rotary multiaxial borehole pouring concrete occluding pile wall is combined with an internal supporting system or anchor rod to form an integral enclosing structure. The slope protection project can be enclosed by an cantilever pile wall without an internal supporting system and anchor rods inside. An enclosure wall adopting multiaxial borehole pouring concrete occluding piles can be constructed along the foundation pit enclosing axis; because the planes of the stressed multiaxial borehole pouring concrete occluding piles are rotated by 90 DEG at a fixed position, the long edges of the cross sections of the multiaxial borehole pouring concrete occluding piles are perpendicular to the foundation pit enclosing axis, so that the lateral resistant strength and the rigidity of the enclosure wall are improved, and the cost of the project is lowered. Compared with method of using the underground continuous wall for enclosing, the method is easy and rapid to implement with simple construction machines and the enclosure wall with strong rigidity, low manufacturing cost and the like. Calculation shows that the rigidity of the enclosure wall adopting conventional reinforcing steel bars can be improved by about six times, and the resistance to bending can be improved by about 2 times, and the amount of reinforcing steel bars used and the comprehensive manufacturing cost are all reduced by about half.

Description

technical field [0001] The invention relates to a new enclosure protection method for multi-axis drilling pouring concrete occlusal pile walls for deep foundation pit enclosure engineering and slope protection engineering. The enclosure method uses rotatable multi-axis drilling to pour reinforced concrete occlusal pile walls, combined with internal support systems or anchors to form a complete enclosure structure. For slope projects, cantilever pile walls without internal supports and anchors can also be used Containment practices. The enclosure wall in this enclosure method adopts multi-axis drilling and pouring reinforced concrete occlusal piles, and the enclosure wall is formed along the axis of the foundation pit enclosure. It can also be rotated by 90° in the plane positioning of the stressed enclosure piles as needed, so that The long side of the cross-section of the reinforced concrete occlusal pile is perpendicular to the enclosure axis, so that the bending strength o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D5/18
Inventor 严平
Owner ZHEJIANG UNIV
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