Precast pile end sinking assisting device
By using a static grouting device in the prefabricated pile end sinking device to lubricate and weaken the soil strength at the pile end, the problems of slow construction speed and high cost in the hard soil interlayer are solved, and efficient pile end sinking and bearing capacity are achieved.
Patent Information
- Application Number
- CN202422774357.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-11-14
AI Technical Summary
In the prior art, when prefabricated piles encounter hard soil interlayers when prefabricated piles are statically pressed, the construction speed is slow, the cost is high, and it is difficult to ensure the bearing capacity of a single pile.
A prefabricated pile-end sinking device is designed, and a static grouting device is used to set up an open-hole pipe and fixing sheet in the pile tip, inject bentonite slurry or water, lubricate and weaken the soil strength at the pile end, reduce the resistance to pile pressing, and grout at the pile end after the pile pressing is completed to improve the bearing capacity.
No pre-guided holes are required, which improves construction speed, reduces construction costs, and enhances the bearing capacity of the pile ends and pile sides.
Smart Images
Figure CN223163863U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pile foundation structures, in particular to a precast pile tip sinking assisting device. Background Art
[0002] Reinforced concrete precast piles are widely used due to their high bearing capacity, fast construction speed, reliable pile sinking quality and low cost. The static pile pressing method is commonly used in precast pile construction because of its characteristics of no noise, no vibration and less impact on the surrounding environment during construction.
[0003] In the prior art, when precast piles encounter thick hard soil interlayers during the static pile pressing process, phenomena such as the pile being unable to be pressed down easily occur. The commonly used solution in engineering is to pre-drill holes and then sink the piles, which not only has a slow construction speed and low efficiency, increases construction costs, but also is not conducive to the control of single pile bearing capacity.
[0004] Therefore, how to design a precast pile tip sinking assisting device to improve the construction speed, reduce the construction cost and ensure the single pile bearing capacity has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model
[0005] In view of the above-mentioned defects of the prior art, the utility model provides a precast pile tip sinking assisting device, aiming to reduce the dynamic resistance of pile pressing, improve the pile pressing efficiency, and at the same time improve the bearing capacity of the pile tip and the pile side.
[0006] To achieve the above technical purpose, the utility model provides a precast pile tip sinking assisting device, which includes a pile tip arranged at the end of the precast pile, and a static pressure grouting device is penetrated in the pile tip;
[0007] The static pressure grouting device includes an opening pipe with several openings on its surface, a fixing piece is arranged outside the opening pipe, and diaphragms are respectively arranged between the opening pipe and the fixing piece and outside the fixing piece;
[0008] A grouting pipe communicated with the opening pipe is penetrated in the precast pile.
[0009] Preferably, the opening pipe is arranged along the direction of the pile tip stabbing and extends to the end of the pile tip stabbing end.
[0010] Preferably, the grouting pipe and the opening pipe are of an integral structure.
[0011] Preferably, the fixing piece is a C-shaped steel sheet and the diaphragm is a rubber film.
[0012] Advantages of the utility model:
[0013] Due to the above structural design of the present utility model, there is no need to pre-drill holes and then sink the piles. The static pressure grouting device can inject bentonite slurry or water to lubricate and weaken the strength of the soil at the pile tip, reducing the dynamic resistance of pile pressing for precast piles, thereby improving the construction speed and reducing the construction cost. Further, after pile pressing is completed, the static pressure grouting device can be used for pile tip grouting of precast piles, thereby improving the bearing capacity of the pile tip and pile side of precast piles. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a schematic structural diagram of the present utility model;
[0015] Figure 2 is Figure 1 a schematic structural diagram of the pile tip part in
[0016] Figure 3 is Figure 2 a schematic structural diagram in elevation;
[0017] Figure 4 is a schematic structural diagram of the static pressure grouting device of the present utility model;
[0018] Figure 5 is Figure 4 a schematic structural diagram of the perforated pipe in
[0019] Figure 6 is Figure 4 a schematic structural diagram of the fixing piece in
[0020] In the figure: 1 precast pile, 2 pile tip, 3 static pressure grouting device, 31 perforated pipe, 32 fixing piece, 33 diaphragm, 4 grouting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The following will further illustrate the concept, specific structure and technical effects generated by the present utility model in conjunction with the drawings, so as to fully understand the purpose, features and effects of the present utility model.
[0022] Embodiment:
[0023] As Figures 1-6 shown, a specific embodiment of the precast pile tip sinking assisting device of the present utility model includes a pile tip 2 provided at the pile tip of the precast pile 1, and a static pressure grouting device 3 is penetrated in the pile tip 2.
[0024] The static pressure grouting device 3 includes a perforated pipe 31 with a plurality of openings formed on its surface, a fixing piece 32 is arranged outside the perforated pipe 31, and diaphragms 33 are respectively arranged between the perforated pipe 31 and the fixing piece 32 and outside the fixing piece 32.
[0025] A grouting pipe 4 communicating with the perforated pipe 31 is penetrated in the precast pile 1.
[0026] The main innovation of the present utility model lies in that the static pressure grouting device 3 can inject bentonite slurry or pressurized water, which lubricates and weakens the strength of the soil at the pile tip, reduces the dynamic resistance of pile pressing of the precast pile 1, and improves the pile pressing efficiency.
[0027] Specifically, the perforated pipe 31 is arranged along the punching direction of the pile tip 2 and extends to the end of the punching end of the pile tip 2.
[0028] The grouting pipe 4 and the perforated pipe 31 are of an integral structure.
[0029] In some embodiments, the perforated pipe 31 is a steel pipe with holes, the fixing piece 32 is a C-shaped steel sheet, and the diaphragm 33 is a rubber membrane, which ensures the structural stability of the perforated pipe 31.
[0030] The working principle and usage process of the present utility model:
[0031] When it is difficult to press the precast pile 1, bentonite slurry or water is injected into the static pressure grouting device 3 through the grouting pipe 4. The bentonite slurry or pressurized water is injected through the pile tip 2. Its function of lubricating and weakening the strength of the soil at the pile tip reduces the dynamic resistance of pile pressing of the precast pile 1. After pile pressing is completed, the static pressure grouting device 3 can be used for pile tip grouting of the precast pile 1 to improve the bearing capacity of the pile tip and pile side of the precast pile 1.
[0032] The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present utility model without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present application based on the concept of the present utility model through logical analysis, reasoning, or limited experiments on the basis of the prior art shall fall within the protection scope determined by the claims.
Claims
1. Prefabricated pile tip sinking assistance device, including a pile tip arranged at the tip of the prefabricated pile, characterized in that: A static pressure grouting device is arranged inside the pile tip; The static pressure grouting device includes an opening pipe with a plurality of openings on its surface. A fixing piece is arranged outside the opening pipe, and diaphragms are respectively arranged between the opening pipe and the fixing piece and outside the fixing piece; A grouting pipe communicated with the opening pipe is arranged inside the precast pile.
2. The precast pile tip sinking assistance device according to claim 1, wherein: The opening pipe is arranged along the driving direction of the pile tip and extends to the end of the driving end of the pile tip.
3. The precast pile tip sinking assistance device according to claim 1 or 2, characterized in that: The grouting pipe and the opening pipe are of an integral structure.
4. The precast pile tip sinking assistance device according to claim 3, characterized in that: The fixing piece is a C-shaped steel sheet, and the diaphragm is a rubber film.