CN209923919U - Plastic sleeve energy pile structure - Google Patents
Plastic sleeve energy pile structure Download PDFInfo
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- CN209923919U CN209923919U CN201920299371.2U CN201920299371U CN209923919U CN 209923919 U CN209923919 U CN 209923919U CN 201920299371 U CN201920299371 U CN 201920299371U CN 209923919 U CN209923919 U CN 209923919U
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Abstract
The utility model relates to a plastic sleeve energy pile structure, which comprises a plastic sleeve pile, a heat exchange pipe, a main water supply pipe, a main water outlet pipe, a water supply branch pipe, a water outlet branch pipe, a pump machine and a ground source heat pump unit; the top of the plastic casing pile is provided with a cover plate, the bottom of the plastic casing pile is provided with a prefabricated pile tip, the outer ring of the body of the plastic casing pile is a plastic casing pipe, a reinforcement cage is arranged inside the plastic casing pipe and is filled with concrete, and a heat exchange pipe is fixed outside the plastic casing pipe; the heat exchange tubes are uniformly distributed on the surface of the pile body of the plastic casing pile, and the tops of the heat exchange tubes penetrate through the reserved small holes in the cover plate and are respectively connected with the water supply branch pipes or the water outlet branch pipes in the same way; the water supply branch pipe and the water outlet branch pipe are transversely arranged inside the roadbed. The utility model has the advantages that: the annular gap between the plastic sleeve and the immersed tube is utilized to lay the heat exchange tube, so that the heat exchange tube is protected, and the heat exchange tube is prevented from being collided in the immersed tube process or the concrete pouring process to deform, bend or leak and damage.
Description
Technical Field
The utility model belongs to pile foundation engineering field, in particular to plastic casing energy pile structure is applicable to and uses in embankment soft foundation reinforcement engineering, especially is particularly suitable for in city municipal administration soft foundation road.
Background
With the increasing environmental pollution problem, geothermal energy is gradually researched and utilized as a green clean energy source. The ground source heat pump technology realizes heat exchange with a soil body through a heat exchange pipe embedded in a constant temperature soil layer, absorbs heat from the constant temperature soil layer in a heat supply mode and supplies heat to the ground surface or a nearby house; the heat from the outside is absorbed and discharged into the stratum in the refrigeration mode, and the temperature regulation effect of being warm in winter and cool in summer is achieved.
The traditional geothermal energy utilization needs large-area soil body excavation to lay a heat exchange pipeline, so that the cost is high, and the large-area popularization is difficult. The energy pile formed by the pile body and the heat exchange pipeline solves the waste of extra drilling holes and saves the cost. The energy pile is characterized in that the energy pile comprises a plurality of heat exchange pipelines, wherein one of the heat exchange pipelines is formed by directly binding a heat exchange pipe on a reinforcement cage in a cast-in-place mode, and pouring concrete is directly carried out after the heat exchange pipe is sunk into a hole; and the other method is to wind the heat exchange tube on the surface of the precast pile for static drilling and root planting. Both the two methods have the defects that the heat exchange pipeline is embedded in the cast-in-place pile, the binding operation is complex, the pipeline is easy to bend or block in the process of pouring concrete, and the poured concrete is not easy to compact along with the increase of the depth of the pile body, so that the stress and the heat conduction efficiency of the pile body are influenced; the latter heat exchange pipeline is directly wound on the surface of the pile body, needs additional locking and fastening, and can be damaged along with the sinking process of the pile body. On the other hand, the plastic sleeve pile is light as a composite foundation treatment method, has simple construction machinery, simple operation and quality detection, reliable pile forming quality and small influence on the environment, and can effectively solve the settlement problem of the soft foundation of the embankment.
In summary, the application prospects of the energy pile and the plastic sleeve pile are very huge, but the existing energy pile technology has the problems of difficult pre-burying of heat exchange pipes, easy damage, low heat conduction efficiency and the like, and the improvement of the technology is urgently needed to solve the problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned not enough, provide a plastic casing energy stake structure.
The plastic sleeve energy pile structure comprises a plastic sleeve pile, a heat exchange pipe, a main water supply pipe, a main water outlet pipe, a water supply branch pipe, a water outlet branch pipe, a pump machine and a ground source heat pump unit; the top of the plastic casing pile is provided with a cover plate, the bottom of the plastic casing pile is provided with a prefabricated pile tip, the outer ring of the body of the plastic casing pile is a plastic casing pipe, a reinforcement cage is arranged inside the plastic casing pipe and is filled with concrete, and a heat exchange pipe is fixed outside the plastic casing pipe; the heat exchange tubes are uniformly distributed on the surface of the pile body of the plastic casing pile, and the tops of the heat exchange tubes penetrate through the reserved small holes in the cover plate and are respectively connected with the water supply branch pipes or the water outlet branch pipes in the same way; the water supply branch pipe and the water outlet branch pipe are transversely arranged in the roadbed, and one end of the water supply branch pipe and one end of the water outlet branch pipe are correspondingly connected with a main water supply pipe or a main water outlet pipe; the main water supply pipe and the main water outlet pipe are arranged on two sides of the roadbed in parallel along the road direction and are finally connected with the pump machine and the ground source heat pump unit in series to form a loop.
Preferably, the method comprises the following steps: the winding form on the surface of the plastic sleeve can be spiral, U-shaped, W-shaped or other combination forms, the diameter is 5-15cm, and the fixing mode is hot melting connection.
Preferably, the method comprises the following steps: the water supply branch pipe and the water outlet branch pipe are respectively arranged on two sides of the plastic casing pipe pile and are transversely arranged along the road direction; one end of the water supply branch pipe is closed, and the other end of the water supply branch pipe is connected to the main water supply pipe; one end of the water outlet branch pipe is closed, and the other end of the water outlet branch pipe is connected to the main water outlet pipe.
Preferably, the method comprises the following steps: the plastic sleeve pile comprises a plastic sleeve, a prefabricated pile tip, a cover plate and a sinking pipe, and the heat exchange pipe is arranged in a circumferential gap between the sinking pipe and the plastic sleeve.
Preferably, the method comprises the following steps: the heat exchange pipes, the water supply branch pipes, the water outlet branch pipes, the main water supply pipe and the main water outlet pipe are all made of PE pipes, the connection parts are connected through hot melting, and the surfaces of the water supply branch pipes, the water outlet branch pipes, the main water supply pipe and the main water outlet pipe are wrapped with heat insulation materials.
Preferably, the method comprises the following steps: the plastic sleeve adopts a PVC pipe, and the diameter is 160-200 mm; the sinking pipe is a steel pipe with the diameter of 200-250 cm.
The utility model has the advantages that:
1) the heat exchange pipes are laid by utilizing the annular gap between the plastic sleeve and the immersed pipes, so that the heat exchange pipes are protected, and the heat exchange pipes are prevented from being collided in the pipe immersing process or the concrete pouring process to deform, bend or leak and damage;
2) the heat exchange tube and the plastic sleeve can be fixed in a hot melting mode, so that the use of additional fixing lock catches is avoided, and the fixing forms are various and can adopt U-shaped, W-shaped, spiral and other combination forms;
3) the structure design is reasonable, the structure is a stress structure and an energy structure, the advantages of the energy pile and the plastic casing pile are fully absorbed, the pile body pouring quality is easy to control, the problem of embankment soft foundation settlement can be effectively solved, and the laid heat exchange pipeline can provide refrigeration or heat supply service for buildings on two sides of a road or around the road, so that the energy-saving and environment-friendly effects are achieved. In the perennial snowmelt weather areas, the system can also melt and unfreeze the snow on the road surface;
4) after the immersed tube reaches a designated position, the outer sleeve immersed tube can be recycled, so that the construction cost is saved, and after the immersed tube is pulled out, the soil body around the pile body can automatically fill the gap under the action of outside soil pressure, so that the contact area of the heat exchange tube and the soil body is increased, and the heat exchange efficiency is improved;
5) the plastic sleeve energy pile is simple and convenient to construct, the heat exchange pipeline is fixed in advance, the pile sinking speed is high, the outward radial permeation of the cast-in-place concrete is inhibited, the waste of the cast-in-place concrete is reduced, and the environmental pollution is avoided;
6) the defects of large occupied space and high cost of the traditional geothermal energy utilization equipment are overcome, most pipelines of the system are buried in the embankment and the soil body, no extra ground space is occupied, and the system meets the requirements of urban construction planning.
Drawings
FIG. 1 is a schematic structural diagram of a pile body of a plastic sleeve energy pile after pile forming;
FIG. 2 is a schematic diagram of a pile body structure in a sinking construction process of a sinking pipe;
FIG. 3 is an overall floor plan of a plastic sleeve energy pile system;
FIG. 4 is a schematic view of a cross-sectional piping connection of a water supply branch pipe;
FIG. 5 is a cross-sectional piping connection diagram of the outlet manifold.
Description of reference numerals: a plastic casing pile 1; a heat exchange tube 2; a total water supply pipe 3; a total water outlet pipe 4; a water supply branch pipe 5; a water outlet branch pipe 6; a pump 7; a ground source heat pump unit 8; a cover plate 9; a sinking pipe 10; a plastic sleeve 11; the stake tip 12 is prefabricated.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
The plastic sleeve energy pile structure comprises a plastic sleeve pile 1, a heat exchange pipe 2, a total water supply pipe 3, a total water outlet pipe 4, a water supply branch pipe 5, a water outlet branch pipe 6, a pump machine 7 and a ground source heat pump unit 8; the top of the plastic casing pipe pile 1 is provided with a cover plate 9, the bottom of the plastic casing pipe pile 1 is provided with a prefabricated pile tip 12, the outer ring of the pile body is a plastic casing pipe 11, a reinforcement cage is arranged inside the plastic casing pipe 11, concrete is poured, and the heat exchange pipe 2 is fixed outside the plastic casing pipe 11; the heat exchange tubes 2 are uniformly distributed on the surface of the pile body, the top parts of the heat exchange tubes penetrate through the reserved small holes in the cover plate 9, and the heat exchange tubes 2 with certain lengths are reserved at the water inlet and the water outlet and are respectively connected with the water supply branch pipe 5 or the water outlet branch pipe 6 in the same way; the water supply branch pipe 5 and the water outlet branch pipe 6 are transversely arranged in the roadbed, and one end of the water supply branch pipe is correspondingly connected with the main water supply pipe 3 or the main water outlet pipe 4; the main water supply pipe 3 and the main water outlet pipe 4 are arranged on two sides of the roadbed in parallel along the road direction, and are connected with the pump 7, the ground source heat pump unit 8 and the like in series to form a loop, so that a main pipeline system is formed.
The heat exchange tube 2 can be wound on the surface of the plastic sleeve 11 in a spiral, U-shaped, W-shaped or other combined form, the diameter is generally 5-15cm, and the fixing mode is hot melt connection; the water supply branch pipe 5 and the water outlet branch pipe 6 are respectively arranged at two sides of the plastic casing pile 1 and are transversely arranged along the road direction, one end of the water supply branch pipe is closed, and the other end of the water supply branch pipe is connected to the main water supply pipe 3 or the main water outlet pipe 4; the heat exchange pipes 2, the water supply branch pipes 5, the water outlet branch pipes 6, the main water supply pipe 3 and the main water outlet pipe 4 are all made of PE pipes, the connection parts are connected through hot melting, and the surfaces of the water supply branch pipes 5, the water outlet branch pipes 6, the main water supply pipe 3 and the main water outlet pipe 4 are wrapped with certain heat insulation materials; the plastic casing pipe pile 1 comprises a plastic casing pipe 11, a prefabricated pile tip 12, a cover plate 9 and a sinking pipe 10, and the heat exchange pipe 2 is arranged in an annular gap between the sinking pipe 10 and the plastic casing pipe 11; the plastic sleeve 11 is made of PVC pipes, the diameter is 160mm-200mm, a single PVC pipe can be adopted in length, and the PVC pipes can be spliced according to the depth length of the pile; the sinking pipe 10 is a steel pipe with the diameter of 200 and 250 cm.
As shown in fig. 1, a plastic sleeve pile 1 is formed by a plastic sleeve 11, a steel reinforcement cage and concrete are poured inside the plastic sleeve pile, a double-spiral heat exchange tube 2 is arranged on the surface of the plastic sleeve pile, and a water inlet and a water outlet of the heat exchange tube penetrate through a reserved hole in a top cover plate 9 and exceed the pile top by a certain distance; the bottom of the plastic sleeve 11 is fixedly connected with the prefabricated pile tip 12.
As shown in figure 2, the plastic sleeve 11 is sleeved with the immersed tube 10 at the outer side in the sinking process, the heat exchange tube 2 is arranged in the annular gap between the plastic sleeve 11 and the immersed tube 10, and the bottom of the plastic sleeve 11 is tightly connected with the precast pile tip 12.
As shown in fig. 3, a water supply branch pipe 5 and a water outlet branch pipe 6 are transversely arranged along a direction vertical to a road, and are respectively positioned at two sides of a row of plastic casing piles 1, and the water supply branch pipe 5 and the water outlet branch pipe 6 are respectively connected with a main water supply pipe 3 or a main water outlet pipe 4 at two sides of the road; the water inlet of the reserved heat exchange pipe 2 at the top of the plastic casing pipe pile 1 is connected with the water supply branch pipe 5 in the same way, and the water outlet is connected with the water outlet branch pipe 6 in the same way; the total water supply pipe 3 and the total water outlet pipe 4 which are embedded at two sides of the highway are connected with an external pump 7, a ground source heat pump unit 8 and the like in series to form an integral pipeline system.
As shown in fig. 4, the water supply branch pipes 5 are arranged inside the roadbed, one end of each water supply branch pipe is closed, and the other end of each water supply branch pipe is connected with the main water supply pipe 3; the plastic casing pipe pile 1 is arranged at the bottom of the roadbed, and a water inlet of a heat exchange pipe 2 reserved at the top is connected with a water supply branch pipe 5 at the upper part in the same way;
as shown in fig. 5, the water outlet branch pipe 6 is arranged inside the roadbed, one end of the water outlet branch pipe is closed, and the other end of the water outlet branch pipe is connected with the main water outlet pipe 3; the plastic casing pipe pile 1 is arranged at the bottom of the roadbed, and the water outlet of the heat exchange pipe 2 reserved at the top is connected with the water outlet branch pipe 5 at the upper part in the same way;
the construction method of the plastic sleeve energy pile structure comprises the following steps:
1) construction preparation: firstly, leveling a field, paving a 20 cm-thick sand, gravel or gravel cushion layer, preparing a plastic sleeve 11 in advance, connecting PVC pipes in advance if lengthening is needed, and setting out and arranging pile positions on a construction site;
2) manufacturing a precast pile tip 12: the prefabricated pile tip 12 is made of reinforced concrete through pouring, the diameter of the prefabricated pile tip is about 30cm, and a joint capable of being tightly connected with the plastic sleeve 11 is reserved at the top of the prefabricated pile tip;
3) laying of the heat exchange tubes 2: arranging the heat exchange tube 2 on the surface of the plastic sleeve 11 according to a designed laying scheme, lightly taking and placing in the arranging process to prevent the heat exchange tube 2 from colliding or bending and leaking, connecting and fixing the heat exchange tube 2 and the plastic sleeve 11 in a hot melting mode after laying is finished, paying attention to prevent the wall of the plastic sleeve 11 from being melted through, and finally firmly connecting the laid plastic sleeve 11 and the prefabricated pile tip 12;
4) and (3) driving the plastic sleeve 11: moving the driving device to a proper position, lifting the plastic casing 11 by using a lifting rope, slowly pulling the plastic casing into the immersed tube 10, starting static pressure sinking after the bottom of the immersed tube 10 reaches the prefabricated pile tip 12, aligning the sinking pile positions, and driving the immersed tube 10 to a designed depth by using a machine;
5) pulling out the immersed tube 10: after the plastic casing pipe 11 is arranged in place, the immersed pipe 10 is pulled out, the immersed pipe is pulled out vertically and slowly in the pulling-out process to prevent the heat exchange pipe 2 from being damaged, and then the machine is moved to arrange the next pile position until the embedding work of all the piles is finished;
6) depth of cut pile and inspection casing: cutting and arranging the redundant plastic sleeve 11 exposed at the top, checking the depth of the plastic sleeve 11, and cleaning the interior of the plastic sleeve 11 at any time to prevent impurities from entering the plastic sleeve;
7) putting a steel reinforcement cage: a length of reinforcement cage is placed on top of the plastic sleeve 11. The steel bars are uniformly inserted, the top of the steel bars exceeds the pile top by 25cm, the steel bars are connected with the top layer reinforcing bars of the cover plate 9, and the main reinforcing bars of the steel bar cage are bound and connected with the bottom layer reinforcing bars of the cover plate 9;
8) pouring concrete: concrete is poured into the plastic sleeve 11 in a centralized manner, a small lengthened vibrating rod is adopted for vibrating, and the construction of a pile and a cover plate 9 is completed;
9) pile body detection: after the strength of the pile body reaches a certain requirement, the pile-forming can be detected, and the method is similar to other cast-in-place piles.
10) Burying a pipeline: filling a embankment by adopting a layered paving mode, paving and connecting a main water supply pipe 3, a main water outlet pipe 4, a water supply branch pipe 5 and a water outlet branch pipe 6 after paving to a preset height, respectively connecting a water inlet and a water outlet of a heat exchange pipe 2 reserved at the top of a plastic casing pile 1 with the water supply branch pipe 5 and the water outlet branch pipe 6 at the same time, wrapping heat insulation materials on the surface of a pipeline for protection and heat insulation, and performing pressure-resistant protection of an outer casing steel pipe on the pipeline paved in a road central pressure zone;
11) carrying out hydrostatic test and embankment filling: carrying out a hydrostatic test after the pipeline is laid, ensuring that the pipeline is smooth and water leakage does not exist, then slowly covering the embankment on the pipeline in a layering way, wherein the total water supply pipe 3 and the total water outlet pipe 4 on two sides of the road are not in the main pressure range of the road surface, and a manual compaction mode is suggested in the process of covering soil on the upper part and filling in a layering way, so that the pipeline laid on the lower part is prevented from being damaged, if necessary, certain protection measures can be taken to prevent the pipeline from being damaged, and a large-scale road roller can be used after the main pressure area in the center of the road is paved with embankment with certain;
12) putting into use: after the construction of the embankment and the pavement is finished, the pipeline system is connected with the external pump unit 7 and the ground source heat pump unit 8 in series, the pump unit 7 is started, and the heat-conducting liquid in the pipeline begins to be recycled, so that the refrigeration and heating service is provided for buildings on two sides of the highway and nearby buildings.
Claims (7)
1. The utility model provides a plastics sleeve pipe energy pile structure which characterized in that: comprises a plastic casing pile (1), a heat exchange pipe (2), a main water supply pipe (3), a main water outlet pipe (4), a water supply branch pipe (5), a water outlet branch pipe (6), a pump (7) and a ground source heat pump unit (8); a cover plate (9) is arranged at the top of the plastic casing pile (1), a prefabricated pile tip (12) is arranged at the bottom of the plastic casing pile (1), a plastic casing pipe (11) is arranged on the outer ring of the pile body of the plastic casing pile (1), a reinforcement cage is arranged inside the plastic casing pipe (11) and is filled with concrete, and a heat exchange pipe (2) is fixed outside the plastic casing pipe (11); the heat exchange tubes (2) are uniformly distributed on the surface of the pile body of the plastic sleeve pile (1), and the tops of the heat exchange tubes (2) are respectively connected with the water supply branch pipes (5) or the water outlet branch pipes (6) in the same way after penetrating through the reserved small holes in the cover plate (9); the water supply branch pipes (5) and the water outlet branch pipes (6) are transversely arranged in the roadbed, one ends of the water supply branch pipes (5) are correspondingly connected with the main water supply pipe (3), and one ends of the water outlet branch pipes (6) are correspondingly connected with the main water outlet pipe (4); the total water supply pipe (3) and the total water outlet pipe (4) are arranged on two sides of the roadbed in parallel along the road direction and are connected with the pump (7) and the ground source heat pump unit (8) in series to form a loop.
2. The plastic sleeved energy pile structure of claim 1, wherein: the heat exchange tube (2) is wound on the surface of the plastic sleeve (11) and is spiral, U-shaped or W-shaped.
3. The plastic sleeved energy pile structure of claim 1, wherein: the diameter of the heat exchange tube (2) is 5-15cm, and the fixing mode is hot melting connection.
4. The plastic sleeved energy pile structure of claim 1, wherein: the water supply branch pipe (5) and the water outlet branch pipe (6) are respectively arranged at two sides of the plastic casing pipe pile (1) and are transversely arranged along the road direction; one end of the water supply branch pipe (5) is closed, and the other end is connected to the main water supply pipe (3); one end of the water outlet branch pipe (6) is closed, and the other end is connected to the main water outlet pipe (4).
5. The plastic sleeved energy pile structure of claim 1, wherein: the plastic sleeve pile (1) comprises a plastic sleeve (11), a prefabricated pile tip (12), a cover plate (9) and a immersed tube (10), and the heat exchange tube (2) is arranged in a circumferential gap between the immersed tube (10) and the plastic sleeve (11).
6. The plastic sleeved energy pile structure of claim 1, wherein: the heat exchange pipes (2), the water supply branch pipes (5), the water outlet branch pipes (6), the main water supply pipe (3) and the main water outlet pipe (4) are all made of PE pipes, the connection parts are connected through hot melting, and the surfaces of the water supply branch pipes (5), the water outlet branch pipes (6), the main water supply pipe (3) and the main water outlet pipe (4) are wrapped with heat insulation materials.
7. The plastic sleeved energy pile structure of claim 1, wherein: the plastic sleeve (11) adopts a PVC pipe with the diameter of 160-200 mm; the sinking pipe (10) adopts a steel pipe with the diameter of 200 and 250 cm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920299371.2U CN209923919U (en) | 2019-03-11 | 2019-03-11 | Plastic sleeve energy pile structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920299371.2U CN209923919U (en) | 2019-03-11 | 2019-03-11 | Plastic sleeve energy pile structure |
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| CN209923919U true CN209923919U (en) | 2020-01-10 |
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| CN201920299371.2U Active CN209923919U (en) | 2019-03-11 | 2019-03-11 | Plastic sleeve energy pile structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881669A (en) * | 2019-03-11 | 2019-06-14 | 浙江大学城市学院 | A kind of plastic bushing energy pilework and construction method |
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2019
- 2019-03-11 CN CN201920299371.2U patent/CN209923919U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881669A (en) * | 2019-03-11 | 2019-06-14 | 浙江大学城市学院 | A kind of plastic bushing energy pilework and construction method |
| CN109881669B (en) * | 2019-03-11 | 2023-09-19 | 浙江大学城市学院 | Plastic sleeve energy pile structure and construction method |
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