Hole loosening process for displacement pile
A technology for squeezing soil piles and loosening holes, which is applied in the field of loosening technology and soil squeezing pile loosening technology. It can solve the problems of pile hole collapse and the inability to apply the introduction hole technology to squeeze piles, so as to eliminate easy collapse and ensure integrity. sexual effect
Inactive Publication Date: 2011-12-21
黄琦峰 +1
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AI Technical Summary
Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that when there is a relatively hard sand interlayer, clay interlayer or groundwater in the depth of the drill, the collapse of the pile hole is caused, and the construction of the soil-squeezing pile cannot be assisted by the introduction hole technology, and then provided A technique for loosening holes in soil-squeezing piles
Method used
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Experimental program
Comparison scheme
Effect test
specific Embodiment approach 1
[0008] Specific implementation mode one: the specific steps of the soil-squeezing pile loosening technique of the present embodiment are:
[0009] Step 1, the drilling rig drives the drill bit to rotate forward into the foundation soil until the predetermined depth of the designed pile hole, the diameter of the drill bit is 1cm to 5cm larger than the diameter of the pile hole;
[0010] In step 2, the drilling rig drives the drill bit to reverse and exit the foundation soil, and the forward rotation speed of the drill bit is 2 to 3 times that of the drill bit reverse rotation speed.
specific Embodiment approach 2
[0011] Specific embodiment two: in step one of the present embodiment, the diameter of the drill bit is 3 cm larger than the diameter of the pile hole. Other steps are the same as in the first embodiment.
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The invention discloses a hole loosening process for a displacement pile, which relates to a hole loosening process and is used for solving the problem that construction of the displacement pile cannot be finished under the assistance of a hole conducting process due to the collapse of a pile hole caused by the engineering geological conditions of hard sand layer and clay interlayer or boring to underground water. The method comprises the following steps that: I, a drilling machine drives a drill bit to positively rotate into foundation soil till the preset depth of a designed pile hole is reached, wherein the diameter of the drill bit is 1-5 centimeters more than that of the pile hole; and II, the drilling machine drives the drill bit to rotate reversely out of the foundation soil, wherein the positive rotating speed of the drill bit is 2-3 times the reverse rotating speed of the drill bit. The hole loosening process is applied to the construction process of the displacement pile.
Description
technical field [0001] The invention relates to a hole loosening process, in particular to a soil squeezing pile loosening process, which belongs to the technical field of civil engineering. Background technique [0002] During the construction of soil-squeezing piles, it often occurs that the piles cannot be pressed in. At this time, the leading hole technology is often used to achieve the purpose of pressing the piles to a predetermined depth. However, when there is a hard sand interlayer, clay interlayer or groundwater in the depth of the drill, the pile hole will collapse, and the construction of the soil-squeezed pile cannot be assisted by the pilot hole technology. Contents of the invention [0003] The purpose of the present invention is to solve the problem that when there is a relatively hard sand interlayer, clay interlayer or groundwater in the depth of the drill, the collapse of the pile hole is caused, and the construction of the soil-squeezing pile cannot be ...
Claims
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IPC IPC(8): E02D3/08
Inventor 黄琦峰王戈
Owner 黄琦峰