Prefabricated vibration reduction pile and construction method thereof

Abstract

The present invention relates to the field of vibration-damping piles, and in particular, to a prefabricated vibration-damping pile, comprising a prefabricated pipe, a vibration-damping layer, and a water pipe; the vibration-damping layer is inserted into the prefabricated pipe; the water pipe is inserted into the vibration-damping layer; a plurality of water guide holes are provided at a position near the lower end of the water pipe, and a closure member for closing the water guide holes and the lower end of the water pipe is provided at the lower part of the water pipe. In the prefabricated vibration-damping pile provided by the present invention, when the pile is driven, the prefabricated pipe can support the surrounding soil layer to prevent the surrounding soil layer from loosening and collapsing. After the construction of the surrounding buildings is completed, the prefabricated pipe can be withdrawn to allow the vibration-damping layer to remain in the foundation, and the vibration-damping layer remaining in the foundation can achieve a vibration-damping effect. Moreover, before the prefabricated pipe is withdrawn, groundwater can be pumped out through the water pipe in conjunction with the water guide holes to prevent excessive groundwater from floating up the vibration-damping layer.

Description

Technical Field

[0001] The invention relates to the field of vibration-damping piles, and in particular to a prefabricated vibration-damping pile and a construction method thereof. Background Art

[0002] When existing rail transit, such as high-speed rail and subway, is in operation, large vibrations will be generated on the track. The vibration waves are then transmitted from the track to the foundation, and then continuously transmitted from the foundation to the surrounding areas, thus seriously affecting the surrounding buildings and also affecting the surrounding residents.

[0003] Therefore, how to design a vibration-damping pile that can reduce vibration waves has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a prefabricated vibration-damping pile.

[0005] A prefabricated vibration-damping pile comprises a prefabricated pipe, a vibration-damping layer, and a water pipe; the vibration-damping layer is inserted into the prefabricated pipe; the water pipe is inserted into the vibration-damping layer; a plurality of water guide holes are opened near the lower end of the water guide pipe, and a sealing member for closing the water guide holes and the lower end of the water guide pipe is provided at the lower part of the water guide pipe.

[0006] Through the above arrangement, when piling, the prefabricated pipe can support the surrounding soil layer to prevent the surrounding soil layer from loosening and collapsing; after the construction of the surrounding buildings is completed, the prefabricated pipe can be withdrawn to allow the vibration reduction layer to remain in the foundation, and the vibration reduction effect is achieved through the vibration reduction layer remaining in the foundation; and before the prefabricated pipe is withdrawn, groundwater can be pumped out through the water pipe and the water guide hole to prevent excessive groundwater from floating up the vibration reduction layer.

[0007] The present invention is further configured as follows: the vibration-damping layer is in a hollow tube shape, and the water guide pipe is fixedly sleeved at the center of the vibration-damping layer.

[0008] Through the above arrangement, the vibration reduction layer is arranged in a hollow tube shape so that the water pipe can be easily inserted.

[0009] The present invention is further configured as follows: the vibration reduction layer is made of polypropylene foam, because the polypropylene foam not only has a vibration reduction effect, but also has high strength and light material, and is more suitable for the selection of the vibration reduction layer.

[0010] The present invention is further configured as follows: the number of the water guide holes is 4, and the 4 water guide holes are staggeredly distributed along the axial direction of the water guide pipe.

[0011] By staggering the water guide holes along the axial direction of the water guide pipe, the influence of the water guide holes on the strength of the water guide pipe can be reduced to a certain extent.

[0012] The present invention is further configured as follows: the sealing member is an adhesive tape; the adhesive tape is fixedly connected to the outer wall and the bottom wall of the water pipe to cover and seal the water guide hole and the lower end of the water pipe.

[0013] Through the above arrangement, the tape is wrapped around the outer wall of the water pipe to close the water hole and the water pipe, thereby preventing the water hole and the lower end of the water pipe from being blocked by soil when the pile is driven in, and when drainage is required, the tape can be pierced to drain the water.

[0014] The present invention is further configured such that: the prefabricated pipe is formed by pouring concrete.

[0015] The present invention also provides a construction method of the prefabricated vibration-damping piles as in the above scheme, comprising the following steps:

[0016] S1. Drilling: Drill holes on the foundation using a drilling machine to form holes for installing prefabricated vibration-damping piles;

[0017] S2, pile driving: insert the prefabricated vibration-damping piles assembled in advance into the perforations;

[0018] S3, through hole: destroy the sealing piece to make the water guide hole and the lower end of the water guide pipe conduct;

[0019] S4. Drainage: connect the water pipe to the drainage equipment, and use the drainage equipment to extract the groundwater that has seeped into the water pipe through the water holes and the lower end of the water pipe.

[0020] S5. Take out the pipe: Compress the vibration-damping layer and the water pipe, and lift the prefabricated pipe outward along its axial direction to remove it from the foundation. At this time, the vibration-damping layer and the water pipe remain in the foundation, and the construction is completed.

[0021] Furthermore, in step S3, the method for destroying the sealing member is to inject a high-pressure medium into the water conduit from the upper end of the water conduit, and penetrate the sealing member with the high-pressure medium.

[0022] Furthermore, the number of perforations formed is no less than two rows.

[0023] In summary, compared with the prior art, the advantages of the present invention are:

[0024] 1. The prefabricated vibration-damping piles provided by the present invention can support the surrounding soil layers when the piles are driven, thereby preventing the surrounding soil layers from loosening and collapsing.

[0025] 2. After the construction of surrounding buildings is completed, the prefabricated pipes can be pulled out so that the vibration reduction layer remains in the foundation, and the vibration reduction effect is achieved through the vibration reduction layer remaining in the foundation.

[0026] 3. Before extracting the prefabricated pipe, the groundwater can be pumped out through the water pipe and the water hole to prevent excessive floating of the vibration reduction layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0028] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0029] Figure 3 It is a split diagram of the present invention;

[0030] Figure 4 This is the distribution diagram of prefabricated vibration-damping piles (top view).

[0031] Figure numerals: 1. prefabricated pipe; 2. vibration-damping layer; 3. water guide pipe; 31. water guide hole; 32. closing member. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0033] Example:

[0034] Reference Figure 1 As shown, this embodiment provides a prefabricated vibration-damping pile, comprising a prefabricated pipe 1, a vibration-damping layer 2, and a water conduit 3, wherein the prefabricated pipe 1, the vibration-damping layer 2, and the water conduit 3 are coaxially arranged.

[0035] The prefabricated pipe 1 is formed by pouring concrete, but it can also be made of other materials and methods, which is not limited here.

[0036] The prefabricated pipe 1 has two functions. First, it is used to carry the vibration-damping layer 2. Second, there are buildings under construction on some construction sites, so it is necessary to ensure that the surrounding soil will not loosen and collapse when piling. Since the prefabricated pipe 1 is rigid, after it is driven into the foundation, it can support the soil layer nearby to prevent the soil layer from loosening and collapsing. After the building is built and the surrounding soil is backfilled, the prefabricated pipe 1 can be pulled out.

[0037] Combination Figure 3 As shown, the vibration-damping layer 2 is inserted into the prefabricated pipe 1; wherein the vibration-damping layer 2 is preferably made of high-strength and lightweight materials, such as polypropylene foam, which can not only achieve vibration-damping effects, but also meet the requirements of high strength and light weight; specifically, during molding, the vibration-damping layer 2 is designed to be a hollow tube, so that a channel for installing the water pipe 3 is formed in the center of the vibration-damping layer 2 to facilitate the installation of the water pipe 3.

[0038] See also Figure 2As shown, the water pipe 3 is inserted into the vibration reduction layer 2 and fixedly connected to the vibration reduction layer 2. A plurality of water guide holes 31 are provided near the lower end of the water pipe 3, and the water guide holes 31 are connected to the inside of the water pipe 3. For example, four water guide holes 31 are designed, and the four water guide holes 31 are staggered along the axial direction of the water pipe 3. In other words, the four water guide holes 31 are not distributed on the same horizontal plane, and are not arranged on the same side, so as to reduce the influence of the opening of the water guide holes 31 on the overall strength of the water pipe 3, because if the four water guide holes 31 are distributed on the same plane, and the diameter of the water pipe 3 is not very large, the strength of the water pipe 3 where the water guide holes 31 are opened will be greatly weakened.

[0039] Of course, the number of the water guide holes 31 can be other numbers, which are not specifically limited here. According to practice, it is found that it is better to open the water guide holes 31 on the pipe section 0.5m-1m away from the lower end of the water guide pipe 3.

[0040] In this embodiment, a sealing member 32 for sealing the water guide hole 31 and the lower end of the water guide pipe 3 is provided at the lower part of the water guide pipe 3. The sealing member 32 can be made of adhesive tape; during manufacturing, the adhesive tape is wound along the outer wall of the lower part of the water guide pipe 3 and fixedly attached to the outer wall and the bottom end of the water guide pipe 3 to cover and seal the water guide hole 31 and the lower end of the water guide pipe 3, so that when the entire prefabricated pile is lowered, the soil in the foundation is prevented from blocking the water guide hole 31 and the lower end of the water guide pipe 3; and when draining water, the adhesive tape can be easily pierced to drain water using the water guide hole 31 and the lower end of the water guide pipe 3.

[0041] The construction method of the prefabricated vibration-damping piles comprises the following steps:

[0042] S1. Drilling: Use drilling machinery to drill holes on the foundation (the area between the track and the building) to form holes for installing prefabricated vibration-damping piles. Specifically, taking a 10m vibration-damping pile as an example, the depth of the hole should reach 11.5m-12.5m, because after drilling, about 1.5m of soil will be backfilled into the hole.

[0043] S2, pile installation: insert the prefabricated vibration-damping piles assembled in advance into the perforations as a whole to complete the installation of the prefabricated vibration-damping piles. After the installation is completed, repeat steps S1 and S2 to install the second, third, and so on prefabricated vibration-damping piles in parallel. There should be no less than two rows of prefabricated vibration-damping piles, in other words, no less than two rows of perforations. Figure 4 shown.

[0044] S3, through hole: destroy the sealing member 32, so that the water hole 31 and the lower end of the water pipe 3 are connected. Taking the tape as the sealing member 32 as an example, the method of destroying the sealing member 32 is to inject a high-pressure medium (such as high-pressure water) into the water pipe 3 from the upper end of the water pipe 3, and the high-pressure medium penetrates the sealing member 32. After the high-pressure water is pressed into the water pipe 3, it can directly break the tape, so that the water hole 31 of the water pipe 3 and the water pipe 3 are connected, so that the groundwater in the foundation can enter the water pipe 3 from the lower end of the water pipe 3 and the water hole 31, so as to be pumped out. After the building is built and the surrounding soil is backfilled, the work of pulling out the prefabricated pipe 1 can be started.

[0045] S4, drainage: connect the water pipe 3 with a drainage device (such as a water pump), and use the drainage device to extract the groundwater that has seeped into the water pipe 3 through the water hole 31 and the lower end of the water pipe 3. After extracting for a period of time, you can start preparing to remove the pipe.

[0046] S5. Take out the pipe: Compress the vibration damping layer 2 and the water pipe 3, and lift the prefabricated pipe 1 outward along its axial direction to remove it from the foundation. At this time, the vibration damping layer 2 and the water pipe 3 remain in the foundation, and the construction is completed. In this way, when the vibration transmitted by the track is transmitted to the vibration damping layer 2 through the soil layer, it will be blocked and absorbed by the vibration damping layer 2, so that only a small amount of vibration waves continue to be transmitted, thereby greatly reducing the impact on the surrounding buildings. There are two purposes for pulling out the prefabricated pipe 1. First, after pulling out the prefabricated pipe 1, it can be recycled to prepare a new prefabricated vibration damping pile, which is both environmentally friendly and resource recycling; second, since the prefabricated pipe 1 is rigid, if it is left in the foundation, the vibration damping layer 2 is wrapped in the prefabricated pipe 1, making it difficult to achieve a vibration reduction effect.

[0047] The above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the scope of protection required by the present invention.

Claims

1. A construction method for prefabricated vibration-damping piles, characterized in that: The prefabricated vibration-damping pile comprises a prefabricated pipe, a vibration-damping layer, and a water pipe; the vibration-damping layer is inserted into the prefabricated pipe; the water pipe is inserted into the vibration-damping layer; a plurality of water guide holes are opened near the lower end of the water guide pipe, and a sealing member for closing the water guide holes and the lower end of the water guide pipe is provided at the lower part of the water guide pipe; The construction method comprises the following steps: S1. Drilling: Drill holes on the foundation using a drilling machine to form holes for installing prefabricated vibration-damping piles; S2, pile driving: insert the prefabricated vibration-damping piles assembled in advance into the perforations; S3, through hole: destroy the sealing piece to make the water guide hole and the lower end of the water guide pipe conduct; S4, drainage: connect the water pipe with the drainage device, and use the drainage device to extract the groundwater that has infiltrated into the water pipe through the water hole and the lower end of the water pipe; S5. Take out the pipe: Compress the vibration-damping layer and the water pipe, and lift the prefabricated pipe outward along its axial direction to remove it from the foundation. At this time, the vibration-damping layer and the water pipe remain in the foundation, and the construction is completed.

2. The construction method of prefabricated vibration-damping piles according to claim 1, characterized in that: In step S3, the method for destroying the sealing member is to inject a high-pressure medium into the water conduit from the upper end of the water conduit, and penetrate the sealing member through the high-pressure medium.

3. The construction method of prefabricated vibration-damping piles according to claim 2 is characterized in that: The perforations are formed in no less than two rows.

4. The construction method of prefabricated vibration-damping piles according to claim 1, characterized in that: The vibration-damping layer is in the shape of a hollow tube, and the water conduit is fixedly sleeved at the center of the vibration-damping layer.

5. The construction method of prefabricated vibration-damping piles according to claim 4 is characterized in that: The vibration-damping layer is polypropylene foam.

6. The construction method of prefabricated vibration-damping piles according to claim 5, characterized in that: The number of the water guide holes is 4, and the 4 water guide holes are staggeredly distributed along the axial direction of the water guide pipe.

7. The construction method of prefabricated vibration-damping piles according to claim 6, characterized in that: The sealing member is an adhesive tape, which is fixedly connected to the outer wall and the bottom wall of the water pipe to cover and seal the water guide hole and the lower end of the water pipe.

8. The construction method of prefabricated vibration-damping piles according to claim 1, characterized in that: The prefabricated pipe is formed by pouring concrete.

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