Underground continuous wall construction technique of multi-spindle long spiral drill pipe occluding pile

A technology of underground diaphragm wall and construction technology, which is applied in the field of underground diaphragm wall construction technology of multi-axis long auger drill pipe occlusal piles. Solve the problems of low strength of the soil mixing wall, and achieve the effects of being beneficial to management and environmental protection, improving the utilization rate of steel, and reducing the amount of steel used

Inactive Publication Date: 2009-10-21
万勇 +7
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this construction method has the advantages of high construction efficiency and low cost, it has three defects: first, the strength of the cement-soil mixing wall formed is very low and cannot be used as a permanent structure; The complex is a non-rigid structure. When used as foundation pit support, it deforms greatly during the excavation of the foundation pit. When it is adjacent to important buildings and underground pipelines, it is generally difficult to meet the requirements of

Method used

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  • Underground continuous wall construction technique of multi-spindle long spiral drill pipe occluding pile
  • Underground continuous wall construction technique of multi-spindle long spiral drill pipe occluding pile

Examples

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Effect test

Embodiment 1

[0026] Embodiment one.( figure 1 )

[0027] According to the design and construction requirements of the underground diaphragm wall, two long auger drill pipes with a diameter of 2m are used to construct a 50m deep pile hole, and the blade engagement degree between the two long auger drill pipes is 800mm. Driven by the driving device, the two long auger drill rods rotate in opposite directions, and the helical direction of the helical blades on the drill rods is also opposite. During the process, the one-way valve set at the front end of the drill pipe is always closed due to pressure. When the drill pipe reaches the depth of 50m, the drilling rig gradually lifts the drill pipe upwards, while pumping the concrete into the hole through two concrete delivery pipes for concrete pouring. At this time, the one-way valve at the end of the rod is affected by Push outward to open, pour concrete into the hole to form concrete piles and bite together to form a concrete underground con...

Embodiment 2

[0028] Embodiment two.( figure 2 )

[0029] According to the design and construction requirements of the deep foundation maintenance wall, 4 long auger drill pipes 3 with a diameter of 0.3m are used for the construction of 10m deep pile holes, and the engagement degree between the blades of the 4 long auger drill pipes 3 is 100mm. 4 long helical drill rods 3 are driven by the driving device 2, and the 4 long helical drill rods 3 rotate in opposite directions. During the drilling process, the one-way valve arranged at the front end of the drill pipe is always closed due to pressure. When the drill pipe reaches the depth of 10m, the drilling rig gradually lifts the drill pipe upwards, while pumping the concrete through the concrete delivery pipes of the four drill pipes to the hole for concrete pouring. At this time, the unidirectional The valve is opened due to the outward thrust, and the concrete pile is poured into the hole and snapped together. When the drill pipe is pull...

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Abstract

The invention relates to an underground continuous wall construction technique of multi-spindle long spiral drill pipe occluding pile, which belongs to deep foundation and underground continuous wall construction technique and is suitable for construction of deep foundation maintenance walls in civil engineering and deep foundation of buildings. In the construction technique, a plurality of long spiral drill pipes (3) are adopted, wherein continuously spiral blades are arranged along the whole length of the outer walls of the drill pipes, and the drill pipe cores are hollow. During work, a drive set (2) drives the long spiral drill pipes (3) to carry out drilling operation simultaneously in such a way that two adjacent drill pipes rotate in opposite directions, so that large-caliber and large-depth construction is realized; and the spiral blades of adjacent long spiral drill pipes rotate in opposite directions so that the spiral blades can occlude each other in the whole length all the time to effectively ensure the constructing quality of the buildings. The invention can reduce the use level of steel products, effectively reduces the cost of the engineering and only discharges dry soil during the construction so as to be beneficial to the spot management of the construction and achieve environmental-friendly construction.

Description

technical field [0001] The multi-axis long auger rod occlusal pile underground diaphragm wall construction technology relates to deep foundation and underground diaphragm wall construction technology, and is suitable for deep foundation pit maintenance wall of civil engineering and deep foundation construction of buildings. technical background [0002] At present, when carrying out the deep foundation pit maintenance wall of civil engineering and the deep foundation construction of buildings, the construction techniques commonly used at home and abroad include CFG pile technology, BNT construction method, and SMW construction method. The CFG pile technology, also known as the long helical post-cage grouting pile technology, uses a single-axis long helical drilling rig to drill the hole to the pile bottom level, then pumps the concrete into the pile hole through a hollow drill pipe, and lifts it up while pumping the concrete. Drill the pipe to form a concrete pile, and then ...

Claims

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Application Information

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IPC IPC(8): E02D5/18E02D29/02
Inventor 万勇廖少明王卫东白云彭芳乐孔祥鹏黄建彰万军
Owner 万勇
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