Grouting reinforcement device for photovoltaic spiral steel pipe pile
By designing a grouting reinforcement device for photovoltaic spiral steel pipe piles, the problem of poor bearing capacity of photovoltaic spiral steel pipe piles is solved. By grouting and reinforcing soil, the load bearing capacity and soil strength are significantly improved, and safe and reliable photovoltaic construction is achieved.
Patent Information
- Application Number
- CN202420609784.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-27
AI Technical Summary
During the construction process, photovoltaic spiral steel pipe piles cause disturbance to the soil, resulting in damage to the soil structure, reducing their effective stress and shear strength, and thus reducing the load-bearing capacity of photovoltaic spiral steel pipe piles.
A grouting reinforcement device for photovoltaic spiral steel pipe piles is designed, including a grouting tube, a front-end airbag, a rear-end closure mechanism and a grouting assembly. The slurry is injected into the soil around the pile body in sections through the grouting tube, and the front-end airbag and a rear-end closure mechanism are used to form a closed grouting space to enhance the soil strength.
Through the grouting and reinforcement device, the bearing capacity of photovoltaic spiral steel pipe piles is significantly improved, the shear strength of the soil is enhanced, the depth of the pile body is reduced, the cost is saved, and the safety of photovoltaic use is ensured.
Smart Images
Figure CN222594818U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaic construction, in particular to a grouting reinforcement device for photovoltaic spiral steel pipe piles. Background Art
[0002] When the photovoltaic spiral pile pipe is screwed into the soil during construction, the spiral pile blades will cause disturbance to the soil during the screwing process. The disturbance can be attributed to the underground movement of the pile body and the rotational shearing of the spiral pile blades. The displacement and shearing of the photovoltaic spiral pile pipe on the soil during the continuous screwing process will cause the destruction of the original structure of the soil, which will significantly reduce the effective stress and shear strength of the soil; and the installation of the photovoltaic spiral pile pipe will also cause a large deformation of the soil in the area around the pile, reducing its shear strength.
[0003] As the photovoltaic spiral pile pipe is continuously buried downward, the structure of the soil around the pile end is secondary compacted and reshaped. However, the soil near the spiral pile blades and the soil near the central steel shaft are always in a disturbed state due to the continuous rotation of the pile. When the photovoltaic spiral pile pipe reaches the designed depth and stops rotating, there is an obvious soil disturbance area near the central steel shaft and the spiral pile blades. The soil structure in this area is relatively loose. When the natural structure of the soil is disturbed, the bearing capacity of the photovoltaic spiral pile pipe will be greatly reduced. Therefore, it is necessary to provide a grouting reinforcement device for photovoltaic spiral steel pipe piles, which can solve the problem of poor bearing capacity of photovoltaic spiral steel pipe piles in the prior art. Summary of the invention
[0004] The purpose of the utility model is to provide a grouting reinforcement device for photovoltaic spiral steel pipe piles, which can solve the problem of poor bearing capacity of photovoltaic spiral steel pipe piles in the prior art.
[0005] The utility model is achieved in this way:
[0006] A grouting reinforcement device for a photovoltaic spiral steel pipe pile comprises a photovoltaic spiral steel pipe pile, a grouting pipe, a front-end inflatable bag, a rear-end closing mechanism and a grouting assembly; a hollow chamber is formed inside the photovoltaic spiral steel pipe pile for inserting the grouting pipe from top to bottom, so that the grouting pipe can be movably plugged into the photovoltaic spiral steel pipe pile; a plurality of first grouting holes are formed at intervals on the pile body of the photovoltaic spiral steel pipe pile, and the first grouting holes are staggered with the spiral pile body blades of the photovoltaic spiral steel pipe pile, and a plurality of second grouting holes are evenly distributed on the pipe wall of the grouting pipe; the grouting assembly is placed beside the construction position of the photovoltaic spiral steel pipe pile, and the rear end of the grouting pipe is sealed and connected to the pile top of the photovoltaic spiral steel pipe pile through the rear-end closing mechanism, and is externally connected to the grouting assembly; the front-end inflatable bag is arranged at the front end of the grouting pipe and can be sealed and pressed against the inner wall of the photovoltaic spiral steel pipe pile after being inflated, so that a closed grouting space is formed between the rear-end closing mechanism, the front-end inflatable bag, the inner wall of the photovoltaic spiral steel pipe pile and the outer wall of the grouting pipe.
[0007] The rear end closing mechanism includes a pile top flange and a pipe joint; the pile top flange is sealed and installed at the top of the photovoltaic spiral steel pipe pile, and a pipe joint is reserved on the pile top flange, so that the rear end of the grouting pipe passes through the pile top flange through the pipe joint seal and is externally connected to the grouting assembly.
[0008] The first grouting holes are distributed in a plum blossom shape on the pile body of the photovoltaic spiral steel pipe pile.
[0009] The outer wall of the photovoltaic spiral steel pipe pile is wrapped with a plastic film so that the plastic film can temporarily close the first grouting hole.
[0010] The grouting assembly comprises a grouting pipe, a grouting pump, a grouting bucket and a switch controller; one end of the grouting pipe is connected to the rear end of the grouting pipe, and the other end of the grouting pipe is connected to the grouting outlet of the grouting pump; the grouting inlet of the grouting pump is connected to the grouting bucket, and the switch controller is arranged on the grouting pipe.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] 1. The utility model is provided with a grouting pipe and a grouting assembly. The grouting pipe is inserted into the photovoltaic spiral steel pipe pile. The slurry is pumped into the grouting pipe through the grouting assembly and injected into the soil around the pile body in sections through the first grouting hole and the second grouting hole, which plays a role in reinforcing the disturbed soil around the pile body, can improve the bearing capacity of the photovoltaic spiral steel pipe pile, ensure the safety of photovoltaic use, reduce the depth of the pile body into the ground, and save costs.
[0013] 2. The utility model is provided with a front-end air bag and a rear-end closing mechanism, so that a closed grouting space is formed between the rear-end closing mechanism, the front-end air bag, the inner wall of the photovoltaic spiral steel pipe pile and the outer wall of the grouting pipe, ensuring that the grouting will fill the original soil disturbance area with slurry, thereby significantly enhancing the strength of the soil around the pile, and the slurry can also strengthen the connection between the pile and the soil, thereby improving the bearing capacity of the photovoltaic spiral steel pipe pile as a whole. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a construction cross-sectional view of the utility model for the grouting reinforcement device of photovoltaic spiral steel pipe piles;
[0015] Figure 2 It is a front view of a grouting pipe in a grouting reinforcement device for photovoltaic spiral steel pipe piles according to the utility model.
[0016] In the figure, 1 is a photovoltaic spiral steel pipe pile, 101 is a spiral pile blade, 2 is a grouting pipe, 3 is a front-end air bag, 401 is a grouting pipe, 402 is a grouting pump, 403 is a grouting barrel, 404 is a switch controller, and 5 is a rear-end closing mechanism. DETAILED DESCRIPTION
[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0018] Please see attached Figure 1 and attached Figure 2 A grouting reinforcement device for photovoltaic spiral steel pipe piles, comprising a photovoltaic spiral steel pipe pile 1, a grouting pipe 2, a front-end inflatable bag 3, a rear-end closing mechanism 5 and a grouting assembly; a hollow chamber for inserting the grouting pipe 2 from top to bottom is formed inside the photovoltaic spiral steel pipe pile 1, so that the grouting pipe 2 can be movably plugged into the photovoltaic spiral steel pipe pile 1; a plurality of first grouting holes (not shown in the figure) are formed at intervals on the pile body of the photovoltaic spiral steel pipe pile 1, and the first grouting holes are staggered with the spiral pile body blades 101 of the photovoltaic spiral steel pipe pile 1, and the grouting pipe 2 is arranged at a certain distance from the front of the photovoltaic spiral steel pipe pile 1. There are several second grouting holes evenly distributed on the wall (not shown in the figure); the grouting assembly is placed beside the construction position of the photovoltaic spiral steel pipe pile, and the rear end of the grouting pipe 2 is sealed and connected to the pile top of the photovoltaic spiral steel pipe pile 1 through the rear end closing mechanism 5, and is externally connected to the grouting assembly; the front end air bag 3 is arranged at the front end of the grouting pipe 2 and can be sealed and pressed against the inner wall of the photovoltaic spiral steel pipe pile 1 after inflation, so that a closed grouting space is formed between the rear end closing mechanism 5, the front end air bag 3, the inner wall of the photovoltaic spiral steel pipe pile 1 and the outer wall of the grouting pipe 2.
[0019] The specifications of the grouting pipe 2 can be adaptively selected according to the specifications of the photovoltaic spiral steel pipe pile 1 to be constructed. The grouting pipe 2 cooperates with the grouting assembly to inject slurry into the disturbed soil around the pile body of the photovoltaic spiral steel pipe pile 1 through the first grouting hole and the second grouting hole. The reinforcement effect of the soil is ensured by compaction grouting, thereby improving the bearing capacity of the photovoltaic spiral steel pipe pile 1.
[0020] Preferably, the material and specification of the front-end inflatable bag 3 can be adaptively selected according to actual use requirements. The inflation tube of the front-end inflatable bag 3 can be led out through the grouting pipe 2, and is used to inflate the front-end inflatable bag 3 so that the front-end inflatable bag 3 is pressed tightly between the front end of the grouting pipe 2 and the inner wall of the photovoltaic spiral steel pipe pile 1, thereby achieving the purpose of front-end closure. The rear end of the grouting pipe 2 is sealed and connected to the top of the photovoltaic spiral steel pipe pile 1 through the rear-end closing mechanism 5, so that a closed grouting space is formed between the rear-end closing mechanism 5, the front-end inflatable bag 3, the inner wall of the photovoltaic spiral steel pipe pile 1 and the outer wall of the grouting pipe 2, which is conducive to ensuring the density of grouting, thereby ensuring the reinforcement effect of grouting on the soil, thereby improving the bearing capacity of the photovoltaic spiral steel pipe pile 1, ensuring the safety of photovoltaic use, and reducing the depth of the pile body into the soil, saving costs.
[0021] Please see attached Figure 1 The rear end closing mechanism 5 includes a pile top flange (not shown in the figure) and a pipe joint (not shown in the figure); the pile top flange is sealed and installed at the top of the photovoltaic spiral steel pipe pile 1, and a pipe joint is reserved on the pile top flange, so that the rear end of the grouting pipe 2 passes through the pile top flange through the pipe joint seal and is externally connected to the grouting assembly.
[0022] Preferably, the flange structure of the pile top flange can be selected according to the adaptability of the specifications of the photovoltaic spiral steel pipe pile 1 to ensure the sealing effect of the pile top of the photovoltaic spiral steel pipe pile 1. At the same time, a pipe joint is reserved on the pile top flange, and the pipe joint can select a corresponding joint structure according to the adaptability of the specifications of the grouting pipe 2 to ensure the sealing penetration of the grouting pipe 2 and the closed pressurization effect of the closed grouting space.
[0023] The first grouting holes are distributed in a plum blossom shape on the pile body of the photovoltaic spiral steel pipe pile 1.
[0024] Preferably, the number, diameter and distribution of the first grouting holes can be adaptively adjusted according to the grouting requirements to ensure the pressure grouting reinforcement effect. When arranging the first grouting holes, it should be noted that they are staggered with the spiral pile blades 101 to ensure the screwing stability of the photovoltaic spiral steel pipe pile 1 and the pile body structural strength of the photovoltaic spiral steel pipe pile 1.
[0025] The outer wall of the photovoltaic spiral steel pipe pile 1 is wrapped with a plastic film (not shown in the figure), so that the plastic film can temporarily close the first grouting hole.
[0026] Temporarily closing the first grouting hole with a plastic film can prevent sand from entering the photovoltaic spiral steel pipe pile 1 and the grouting pipe 2 and affecting the grouting effect when the photovoltaic spiral steel pipe pile 1 is screwed into the soil.
[0027] Please see attached Figure 1 The grouting assembly includes a grouting pipe 401, a grouting pump 402, a grouting bucket 403 and a switch controller 404; one end of the grouting pipe 401 is connected to the rear end of the grouting pipe 2, and the other end of the grouting pipe 401 is connected to the slurry outlet of the grouting pump 402; the slurry inlet of the grouting pump 402 is connected to the bottom of the grouting bucket 403 through a pipeline, and the switch controller 404 is arranged on the grouting pipe 401.
[0028] The grouting bucket 403 stores slurry, which can be selected according to the working conditions such as soil quality and grouting strength. The specifications of the grouting pump 402 can be selected according to the grouting pressure and flow requirements. The grouting pump 402 achieves the grouting pressurization effect through an air compressor. The grouting pump 402 is equipped with a pressure gauge to ensure the control of the grouting pressure and the safety of the grouting process. The grouting pump 402 pumps the slurry in the grouting bucket 403 to the grouting pipe 2 through the grouting pipe 401, and injects it into the soil through the first grouting hole and the second grouting hole, so as to achieve the purpose of pressure grouting to strengthen the soil.
[0029] Please see attached Figure 1 and attached Figure 2 , the construction method and working principle of the utility model are:
[0030] The length of the photovoltaic spiral steel pipe pile 1 is usually about 4.5m. It is a single steel pipe pile. The bottom of the photovoltaic spiral steel pipe pile 1 is closed and the top of the pile is open, forming a hollow chamber inside. The photovoltaic spiral steel pipe pile 1 is screwed into the soil using conventional construction technology. The photovoltaic spiral steel pipe pile 1 stops screwing in after reaching the designed depth. The construction is completed in one step, and its construction process will not be described here.
[0031] The construction method of segmented grouting reinforcement is adopted. The grouting pipe 2 is inserted into the hollow chamber of the photovoltaic spiral steel pipe pile 1 to the segmented position, and the top of the photovoltaic spiral steel pipe pile 1 is sealed by the pile top flange. The rear end of the grouting pipe 2 passes through the pile top flange through the pipe joint seal. The front airbag 3 is inflated to expand and press against the inner wall of the photovoltaic spiral steel pipe pile 1, and an end closure is formed between the front end of the grouting pipe 2 and the inner wall of the photovoltaic spiral steel pipe pile 1. A closed grouting space is formed between the rear end closing mechanism 5, the front airbag 3, the inner wall of the photovoltaic spiral steel pipe pile 1 and the outer wall of the grouting pipe 2.
[0032] The rear end of the grouting pipe 2 is connected to the grouting pipe 401, and the switch controller 404 and the grouting pump 402 are turned on to send the slurry in the grouting bucket 403 into the grouting pipe 2, and then inject it into the disturbed soil near the pile body through the second grouting hole and the first grouting hole. Since the slurry pumped by the grouting pump 402 has a suitable grouting pressure, it can ensure that the slurry penetrates into the soil after pushing open the plastic film, and has a good reinforcement effect on the soil.
[0033] The principles to be followed during grouting are: pay attention to the control of grouting pressure and grouting volume, and only reinforce the disturbed soil during the grouting process, and do not cause excessive bulging of the soil around the pile foundation. On the one hand, the disturbed soil around the pile generated by the rotation of the spiral pile blade 101 can be reinforced, and on the other hand, the existing state of the surrounding soil can be minimized to ensure reasonable reinforcement of the soil. After the initial setting of the previous grouting, the grouting pipe 2 is lifted to the next grouting position to prevent the slurry from flowing back; repeat the above grouting process, and grout in sections to the top of the pile in turn.
[0034] Finally, after the slurry reached the designed strength, the photovoltaic spiral steel pipe pile 1 was subjected to a static load test. The test data showed that when the photovoltaic spiral steel pipe pile 1 reached the ultimate bearing capacity after grouting, the soil strength of the failure surface was 140-160% of the original soil strength, while the soil strength of the traditional photovoltaic spiral steel pipe pile 1 without grouting reached the ultimate bearing capacity was 44-58% of the original soil strength. It can be seen that the utility model has a significant effect of improving the bearing capacity of the photovoltaic spiral steel pipe pile 1.
[0035] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A grouting reinforcement device for photovoltaic spiral steel pipe piles, characterized by: The photovoltaic spiral steel pipe pile (1) comprises a photovoltaic spiral steel pipe pile (1), a grouting pipe (2), a front-end inflatable bag (3), a rear-end closing mechanism (5) and a grouting assembly; a hollow chamber is formed inside the photovoltaic spiral steel pipe pile (1) for inserting the grouting pipe (2) from top to bottom, so that the grouting pipe (2) can be movably plugged into the photovoltaic spiral steel pipe pile (1); a plurality of first grouting holes are formed at intervals on the pile body of the photovoltaic spiral steel pipe pile (1), and the first grouting holes are staggered with the spiral pile body blades (101) of the photovoltaic spiral steel pipe pile (1); a plurality of first grouting holes are evenly distributed on the pipe wall of the grouting pipe (2); A second grouting hole; a grouting assembly is placed beside the construction position of the photovoltaic spiral steel pipe pile; the rear end of the grouting pipe (2) is sealed and connected to the pile top of the photovoltaic spiral steel pipe pile (1) through a rear end closing mechanism (5) and is externally connected to the grouting assembly; a front end inflatable bag (3) is arranged at the front end of the grouting pipe (2) and can be sealed and pressed against the inner wall of the photovoltaic spiral steel pipe pile (1) after being inflated, so that a closed grouting space is formed between the rear end closing mechanism (5), the front end inflatable bag (3), the inner wall of the photovoltaic spiral steel pipe pile (1) and the outer wall of the grouting pipe (2).
2. The grouting reinforcement device for photovoltaic spiral steel pipe piles according to claim 1 is characterized in that: The rear end closing mechanism (5) comprises a pile top flange and a pipe joint; the pile top flange is sealed and installed at the pile top of the photovoltaic spiral steel pipe pile (1), and a pipe joint is reserved on the pile top flange, so that the rear end of the grouting pipe (2) passes through the pile top flange through the pipe joint seal and is externally connected to the grouting assembly.
3. The grouting reinforcement device for photovoltaic spiral steel pipe piles according to claim 1 is characterized in that: The first grouting holes are distributed in a plum blossom shape on the pile body of the photovoltaic spiral steel pipe pile (1).
4. The grouting reinforcement device for photovoltaic spiral steel pipe piles according to any one of claims 1 to 3, characterized in that: The outer wall of the photovoltaic spiral steel pipe pile (1) is wrapped with a plastic film, so that the plastic film can temporarily close the first grouting hole.
5. The grouting reinforcement device for photovoltaic spiral steel pipe piles according to claim 1 or 2, characterized in that: The grouting assembly comprises a grouting pipe (401), a grouting pump (402), a grouting bucket (403) and a switch controller (404); one end of the grouting pipe (401) is connected to the rear end of the grouting pipe (2), and the other end of the grouting pipe (401) is connected to the grouting outlet of the grouting pump (402); the grouting inlet of the grouting pump (402) is connected to the grouting bucket (403), and the switch controller (404) is arranged on the grouting pipe (401).