Energy pile bearing platform structure

Abstract

According to the energy pile bearing platform structure provided by the utility model, the protected rigid pipe fitting is arranged outside the heat exchange pipe to replace the structure that the heat exchange pipe is directly contacted with the concrete body of the bearing platform in the general design, and the rigid pipe fitting is directly contacted and fixed with the concrete outside the bearing platform; the space between the rigid pipe fitting and the heat exchange pipe is filled with the flexible connecting structure, so that when the heat exchange pipe and the external concrete bearing platform generate relatively obvious relative deformation, the rigid pipe fitting deforms along with external concrete, and hard protection is provided to prevent the internal heat exchange pipe from being extruded; the design of the flexible connecting structure can provide buffering between the rigid pipe fitting and the heat exchange pipe, especially under the condition that relative deformation between the rigid pipe fitting and the heat exchange pipe is obvious, most of relative displacement between the rigid pipe fitting and the heat exchange pipe is absorbed through the flexible connecting structure, and therefore extrusion damage to the heat exchange pipe caused by the connecting position of the pile foundation and the bearing platform in later use is effectively avoided, and the service life of the heat exchange pipe is prolonged. And the survival rate of the heat exchange tubes of the pile foundation with the external heat exchange tubes is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building pile foundation construction, and particularly relates to an energy pile pile cap structure. BACKGROUND

[0002] Pile foundation has the characteristics of high bearing capacity and small settlement, and is widely used in engineering under various geological conditions, and is particularly suitable for building heavy structures on soft foundations. Energy pile is a kind of underground heat exchange pipe system implanted in pile foundation, which utilizes shallow geothermal energy from the ground surface and fully utilizes the good thermal conductivity of concrete to form a heat exchange element with the surrounding ground.

[0003] Traditional energy piles are generally cast in place, that is, the heat exchange pipes are bundled on the steel reinforcement cage, and then the concrete is poured after the steel reinforcement cage is sunk into the pile hole. With the application of static drilling root pile method, a method of directly attaching heat exchange pipes to the outside of the pile body and burying them underground with the pile body has appeared.

[0004] However, the above two methods have certain problems in actual engineering: after the foundation engineering construction is completed, it needs to wait for several months or even several years before starting the equipment engineering construction, and the unprotected heat exchange pipes are easily damaged, resulting in a low survival rate. In addition, the overall shape of the pile can be maintained relatively well during the early pile foundation construction, and the pile body deformation is small, but after the building structure with a large weight on the upper part of the pile is loaded, the pile foundation settlement is obvious and the deformation amount of the pile itself increases. This situation causes the deformation of the heat exchange pipe and the pile to be out of sync. In addition, due to the temperature change inside the heat exchange pipe during normal use, the pile foundation expands and contracts due to heat and cold, further exacerbating the deformation of the heat exchange pipe and the pile, causing damage to the heat exchange pipe and reducing the survival rate of the energy pile with the heat exchange pipe in later use.

[0005] In summary, the existing pile foundation design has the technical problem of insufficient protection of the heat exchange pipe, which causes the heat exchange pipe to be easily damaged during use of the pile body. UTILITY MODEL CONTENTS

[0006] The technical problem to be solved by the utility model is the technical problem of insufficient protection of the heat exchange pipe in the existing pile foundation design, which causes the heat exchange pipe to be easily damaged during use of the pile body.

[0007] In order to solve the above problems, the utility model provides a kind of energy pile pile cap structure, including energy pile main part, heat exchange pipe located the energy pile main part peripheral wall, the energy pile main part and heat exchange pipe pile top are provided with concrete pile cap structure, the bottom end surface of the concrete pile cap structure is provided with cushion structure, the pipe section of the heat exchange pipe being wrapped by concrete pile cap structure is equipped with rigid pipe fitting, the rigid pipe fitting is embedded in the concrete pile cap structure, flexible connecting structure is arranged between the peripheral wall of the heat exchange pipe and the inner peripheral wall of rigid pipe fitting, the heat exchange pipe and rigid pipe fitting can be axially relatively moved by the flexible connecting structure.

[0008] The energy pile pile cap structure provided by the utility model sets the rigid pipe fitting for protection outside the heat exchange pipe of energy pile, replaces the structure that heat exchange pipe directly contacts concrete body in general design, and in the scheme of the utility model, rigid pipe fitting is directly contacted and fixed with concrete pile cap, and flexible connecting structure is arranged between rigid pipe fitting and heat exchange pipe, so that when relatively obvious relative deformation occurs between heat exchange pipe and external concrete pile cap, rigid pipe fitting deforms along with external concrete, and hard protection is provided to avoid extruding internal heat exchange pipe, the design of flexible connecting structure can provide buffer between rigid pipe fitting and heat exchange pipe, especially in the case that relative deformation between the two is obvious, most of the relative displacement between the two is absorbed by flexible connecting structure, so that extrusion damage of heat exchange pipe caused by pile foundation and pile cap connecting position in later use is effectively avoided, heat exchange pipe survival rate of external pile foundation of heat exchange pipe is improved, and the technical problems that the protection of heat exchange pipe is insufficient in existing pile foundation design and heat exchange pipe is easily damaged in pile body use are effectively solved.

[0009] As a preferred scheme, the outer peripheral wall of the rigid pipe fitting is provided with annular lining plate at a predetermined distance in the axial direction, and the annular lining plate is embedded and fixed in the concrete pile cap structure. This design optimizes the external additional structure design of the rigid pipe fitting. By arranging the annular lining plate structure perpendicular to the axial direction on the outer peripheral wall of the rigid pipe fitting, the contact area of the embedded and fixed rigid pipe fitting and the pile cap concrete can be increased, and the stability between the rigid pipe fitting and the internal structure of the pile cap can be enhanced. In addition, due to the structural characteristics of the pile foundation, the pile cap or other building base structure needs to be provided with structure-adapted punching for pipe arrangement, and such punching is prone to leakage. The annular lining plate of this design can effectively block water leakage along the rigid pipe fitting downward.

[0010] As a preferred scheme, the rigid pipe is provided with a tapered pipe section with gradually increasing outer diameter near the upper end face of the concrete pile cap structure, and the upper end of the tapered pipe section is fixedly connected with an annular lining plate. This design optimizes the structure of the rigid pipe near the top surface of the concrete pile cap, increases the support area of the rigid pipe and the annular lining plate at the top, and makes the positioning between the top end of the rigid pipe and the pile cap more stable, so as to facilitate the arrangement of other pipeline structures matched with the heat exchange pipe at the top end of the rigid pipe.

[0011] As a preferred scheme, the rigid pipe, the annular lining plate and the tapered pipe section are all stainless steel formed structures, and the annular lining plate, the tapered pipe section and the rigid pipe are welded and fixed. This design optimizes the material of the rigid pipe, the annular lining plate and the tapered pipe section, adopts stainless steel formed parts, improves the waterproof and rustproof performance of the pile foundation as a whole, and further improves the durability of the pile foundation.

[0012] As a preferred scheme, the top of the tapered pipe section is fixedly supported with a transverse pipe, the transverse pipe is communicated with the heat exchange pipe, and the outer periphery of the transverse pipe is wrapped with an oil and hemp filling layer structure. By wrapping the transverse pipe with an oil and hemp layer, good heat preservation and leakage prevention effects can be achieved, unnecessary heat loss is reduced, and the load can be shared by the cushion material to avoid damage to the concrete.

[0013] As a preferred scheme, the upper end face of the concrete pile cap structure is provided with a sink structure corresponding to the distribution track of the transverse pipe, and the oil and hemp filling layer structure is filled and fixed in the sink structure. This design optimizes the internal structure of the concrete, specially sets a sink near the top end face of the concrete pile cap structure, sets the transverse pipe in the sink structure, and fills and fixes the oil and hemp filling layer structure in the sink structure, which can better protect the transverse pipe.

[0014] As a preferred scheme, the transverse pipe is embedded in the concrete pile cap structure through concrete, and the distance between the transverse pipe and the upper end face of the concrete pile cap structure is 40mm-60mm. This design provides a preferred embedding depth of the transverse pipe in the concrete pile cap, which can balance the protection of the transverse pipe and the reduction of heat loss, and avoid excessive loss of strength of the pile cap due to the arrangement of the heat exchange pipe.

[0015] As a preferred scheme, the flexible connection structure is an asphalt adhesive layer filled between the outer peripheral wall of the heat exchange pipe and the inner peripheral wall of the rigid pipe. This design optimizes the material selection of the flexible connection layer between the outer peripheral wall of the heat exchange pipe and the inner peripheral wall of the rigid pipe, adopts an asphalt adhesive layer structure, which can ensure good waterproof performance and good flexibility of the lining structure, and provide compression resistance and cushioning.

[0016] As a preferred scheme, the adhering surface between the upper end surface of the cushion layer structure and the lower end surface of the concrete platform structure is provided with a waterproof coiled material layer. The waterproof coiled material layer is clamped between the concrete platform and the cushion layer, and the waterproof line of the bottom of the platform is increased through the structure, so that water leakage above is avoided.

[0017] As a preferred scheme, the heat exchange pipe is also provided with the waterproof coiled material layer on the outer peripheral wall of the pipe segment arranged in the cushion layer structure, and the waterproof coiled material layer is integrally connected with the waterproof coiled material layer between the cushion layer structure and the concrete platform structure. The waterproof coiled material layer is arranged on the outer wall of the heat exchange pipe at the bottom of the platform and the cushion layer based on the arrangement structure of the waterproof coiled material layer, and is integrally connected with the waterproof coiled material layer between the cushion layer and the platform above, so that the water-proof and anti-permeation performance of the pile is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A side sectional structure schematic view of the energy pile platform structure is provided in the utility model.

[0019] Figure 2 For Figure 1 An external structure schematic view of the heat exchange pipe in the energy pile platform structure.

[0020] Figure 3 For Figure 1 A local structure schematic view of the connection position of the heat exchange pipe and the cushion layer structure in the energy pile platform structure.

[0021] Among them, Figures 1-3 In the energy pile platform structure:

[0022] 1, energy pile main body; 2, concrete platform structure; 3, cushion layer structure; 4, heat exchange pipe; 5, rigid pipe fitting; 6, annular lining plate; 7, flexible connection structure; 8, tapered pipe segment; 9, transverse pipe fitting; 10, oil and mud filling layer structure; 11, waterproof coiled material layer. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described in combination with specific embodiments.

[0024] Before the working principle of the utility model is described in detail, the description of the utility model needs to be further explained and described: in the description of the utility model, it should be pointed out that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can be directly connected, can be indirectly connected through an intermediate medium, or can be two elements welded connection. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] Reference Figures 1-3 The following examples are described as follows, Figure 1 A side sectional structure schematic view of the energy pile pile cap structure is provided in the utility model; Figure 2 A Figure 1 An external structure schematic view of the heat exchange pipe in the energy pile pile cap structure; Figure 3 A Figure 1 A local structure schematic view of the connection position of the heat exchange pipe and the cushion structure in the energy pile pile cap structure.

[0027] The embodiment of the utility model provides a kind of energy pile pile cap structure, including energy pile main body 1, heat exchange pipe 4 in the peripheral wall of energy pile main body 1, heat exchange pipe 4 and energy pile main body 1 are mutually parallelly arranged, and one end of the outer portion of energy pile main body 1 and heat exchange pipe 4 is wrapped and fixed with concrete cap structure 2, the bottom end surface of concrete cap structure 2 is provided with cushion structure 3, and the pipe section of heat exchange pipe 4 is wrapped with rigid pipe fitting 5 in concrete cap structure 2, rigid pipe fitting 5 is embedded in concrete cap structure 2, and flexible connection structure 7 is arranged between the peripheral wall of heat exchange pipe 4 and the inner peripheral wall of rigid pipe fitting 5, and heat exchange pipe 4 and rigid pipe fitting 5 can be axially relatively moved by flexible connection structure 7.

[0028] The rigid pipe fitting 5 is directly fixed in contact with the concrete of the bearing platform, and the flexible connecting structure 7 is filled between the rigid pipe fitting 5 and the heat exchange pipe 4, so that when relatively obvious relative deformation occurs between the heat exchange pipe 4 and the external concrete bearing platform, the rigid pipe fitting 5 deforms along with the external concrete, and hard protection is provided to avoid extrusion of the internal heat exchange pipe 4, the design of the flexible connecting structure 7 can provide buffering between the rigid pipe fitting 5 and the heat exchange pipe 4, especially in the case that the relative deformation between the two is obvious, most of the relative displacement between the two is absorbed through the flexible connecting structure 7, thereby effectively avoiding the extrusion damage of the heat exchange pipe 4 caused by the connection position of the energy pile and the bearing platform in the later use, improving the survival rate of the heat exchange pipe 4 of the external pile foundation of the heat exchange pipe 4, and effectively solving the technical problems of the existing pile foundation design that the protection of the heat exchange pipe 4 is insufficient, and the heat exchange pipe 4 is easily damaged in use.

[0029] In the technical scheme provided by the embodiment, the outer peripheral wall of the rigid pipe fitting 5 is axially spaced apart by a predetermined distance and provided with a ring-shaped lining plate 6, and the ring-shaped lining plate 6 is embedded and fixed in the concrete bearing platform structure 2. This design optimizes the external additional structure design of the rigid pipe fitting 5, and by arranging the ring-shaped lining plate 6 structure extending vertically to the axial direction on the outer peripheral wall of the rigid pipe fitting 5, the contact area of the embedded and fixed rigid pipe fitting 5 and the bearing platform concrete can be increased, and the stability between the rigid pipe fitting 5 and the internal structure of the bearing platform can be enhanced. Due to the structural characteristics of the pile foundation, the bearing platform or other building base structure needs to be provided with a structure-matched punching hole for the arrangement of the pipeline, and such a punching hole condition is easy to cause leakage. The ring-shaped lining plate 6 of the design can effectively block the downward leakage of water along the rigid pipe fitting 5.

[0030] In the technical scheme provided by the embodiment, the rigid pipe fitting 5 is provided with a tapered pipe section 8 with an upwardly opening gradually increasing portion near the upper end face of the concrete bearing platform structure 2, and the upper edge of the tapered pipe section 8 is fixedly connected with the ring-shaped lining plate 6. This design optimizes the structure of the rigid pipe fitting 5 near the top surface of the concrete bearing platform, and by increasing the support area of the rigid pipe fitting 5 and the top ring-shaped lining plate through the tapered pipe section 8, the positioning between the top end of the rigid pipe fitting 5 and the bearing platform can be made more firm, so as to facilitate the arrangement of other pipeline structures matched with the heat exchange pipe 4 at the top end of the rigid pipe fitting 5.

[0031] In the technical scheme provided by the embodiment, the rigid pipe fitting 5, the ring-shaped lining plate 6 and the tapered pipe section 8 are all stainless steel formed structures, and the ring-shaped lining plate 6 and the tapered pipe section 8 are both welded and fixed with the rigid pipe fitting 5. This design optimizes the material of the rigid pipe fitting 5, the ring-shaped lining plate 6 and the tapered pipe section 8 by adopting stainless steel formed parts, improves the waterproof and rustproof performance of the pile foundation as a whole, and further improves the durability of the pile foundation.

[0032] In the technical scheme provided by the embodiment, the top of the conical pipe section 8 is fixed with a transverse pipe 9, the transverse pipe 9 is communicated with the heat exchange pipe 4, and the outer periphery of the transverse pipe 9 is wrapped with an oil-mud filling layer structure 10. By wrapping the oil-mud layer outside the transverse pipe 9, good heat preservation and leakage prevention effects can be obtained, unnecessary heat loss is reduced, and meanwhile, the load can be shared by the cushion material to avoid that the concrete crushes the transverse pipe 9.

[0033] In the technical scheme provided by the embodiment, the upper end surface of the concrete pile cap structure 2 is provided with a sink structure at a position corresponding to the distribution track of the transverse pipe 9, and the oil-mud filling layer structure 10 is filled and fixed in the sink structure. The design optimizes the internal structure of the concrete, and the sink is specially arranged near the upper end surface of the concrete pile cap structure 2, the transverse pipe 9 is arranged in the sink structure, and the oil-mud filling layer structure 10 is filled and fixed therein, so that the transverse pipe 9 can be better protected.

[0034] In the technical scheme provided by the embodiment, the transverse pipe 9 is pre-buried in the concrete pile cap structure 2 through the concrete, and the spacing range between the transverse pipe 9 and the upper end surface of the concrete pile cap structure 2 is 40mm-60mm. The design provides a preferred pre-buried depth of the transverse pipe 9 embedded in the pile cap concrete, and through repeated verification tests, the spacing between the upper end surface of the concrete pile cap structure 2 and the transverse pipe 9 has the best practical effect when the spacing is 50mm, which can balance the protection of the transverse pipe 9 and the reduction of heat loss, and avoid that the pile cap loses too much strength due to the arrangement of the heat exchange pipe 4.

[0035] In the technical scheme provided by the embodiment, the flexible connection structure 7 is an asphalt adhesive layer filled between the outer peripheral wall of the heat exchange pipe 4 and the outer peripheral wall of the rigid pipe 5. The design optimizes the material selection of the flexible connection layer between the outer peripheral wall of the heat exchange pipe 4 and the inner peripheral wall of the rigid pipe 5, and adopts the structure of the asphalt adhesive layer, which can ensure good waterproof performance and good flexibility of the lining structure to provide compression resistance and buffering. The asphalt adhesive is a flexible material with certain stretching and deforming ability, which can ensure that the heat exchange pipe 4 and the rigid pipe 5 still maintain a sealed and waterproof state when there is a small amount of relative displacement.

[0036] In the technical scheme provided by the embodiment, a waterproof coiled material layer 11 is arranged on the abutting surface between the upper end surface of the cushion layer structure 3 and the lower end surface of the concrete pile cap structure 2. The waterproof coiled material layer 11 is arranged between the concrete pile cap and the cushion layer, which can increase the waterproof line at the bottom of the pile cap, avoid water infiltration and seepage from the upper part, and most importantly, avoid groundwater infiltration to the upper part of the pile cap to avoid damage to the structure of the pile cap due to water immersion.

[0037] In the technical scheme provided by the embodiment, the heat exchange pipe 4 is also attached with the waterproof coiled material layer 11 on the outer peripheral wall of the pipe segment penetrating through the cushion layer structure 3, and the waterproof coiled material layer 11 is integrally connected with the waterproof coiled material layer 11 between the cushion layer structure 3 and the concrete pile cap structure 2. Based on the arrangement structure of the waterproof coiled material, the waterproof coiled material layer 11 is also attached on the outer wall of the heat exchange pipe 4 at the bottom of the pile cap and the cushion layer, and is integrally connected with the waterproof coiled material layer 11 between the upper cushion layer and the pile cap, so that the water-proof and anti-permeation performance of the pile is further improved.

[0038] Although the utility model discloses as above, the protection scope of the utility model disclosed is not limited to this only. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will all fall within the protection scope of the utility model.

Claims

1. An energy pile cap structure, comprising an energy pile body (1), a heat exchange pipe (4) located on the peripheral wall of the energy pile body (1), and a concrete cap structure (2) provided on the top of the energy pile body (1) and the heat exchange pipe (4), and a cushion layer structure (3) provided on the bottom end surface of the concrete cap structure (2), characterized in that, The heat exchange pipe (4) is wrapped by the pipe section of the concrete pier structure (2), and a rigid pipe fitting (5) is arranged outside the pipe section, the rigid pipe fitting (5) is embedded in the concrete pier structure (2), and a flexible connection structure (7) is arranged between the outer peripheral wall of the heat exchange pipe (4) and the inner peripheral wall of the rigid pipe fitting (5), and the heat exchange pipe (4) and the rigid pipe fitting (5) can axially move relative to each other through the flexible connection structure (7).

2. The energy pile raft foundation structure of claim 1, wherein, The outer peripheral wall of the rigid pipe fitting (5) is axially spaced apart by a preset distance and provided with an annular lining plate (6), and the annular lining plate (6) is pre-buried and fixed in the concrete pier structure (2).

3. The energy pile raft foundation structure of claim 2, wherein, The rigid pipe fitting (5) is provided with a tapered pipe section (8) with an upwardly opening gradually increasing at the position close to the upper end surface of the concrete pier structure (2), and the upper edge of the tapered pipe section (8) is fixedly connected with the annular lining plate (6).

4. The energy pile raft foundation structure of claim 3, wherein, The rigid pipe fitting (5), the annular lining plate (6) and the tapered pipe section (8) are all stainless steel formed structures, and the annular lining plate (6) and the tapered pipe section (8) are welded and fixed with the rigid pipe fitting (5).

5. The energy pile raft foundation structure of claim 3, wherein, The top of the tapered pipe section (8) is supported and fixed with a transverse pipe fitting (9), the transverse pipe fitting (9) communicates with the heat exchange pipe (4), and the outer periphery of the transverse pipe fitting (9) is wrapped with an oil and hemp filling layer structure (10).

6. The energy pile raft foundation structure of claim 5, wherein, The upper end surface of the concrete pier structure (2) is provided with a sink structure at the position corresponding to the distribution track of the transverse pipe fitting (9), and the oil and hemp filling layer structure (10) is filled and fixed in the sink structure.

7. The energy pile raft foundation structure of claim 6, wherein, The transverse pipe fitting (9) is pre-buried in the concrete pier structure (2), and the distance between the transverse pipe fitting (9) and the upper end surface of the concrete pier structure (2) is 40mm-60mm.

8. The energy pile raft foundation structure of claim 1, wherein, The flexible connection structure (7) is an asphalt glue layer filled between the outer peripheral wall of the heat exchange pipe (4) and the inner wall of the rigid pipe fitting (5).

9. The energy pile raft foundation structure of claim 8, wherein, The waterproof coiled material layer (11) is arranged on the abutting surface between the upper end surface of the cushion layer structure (3) and the lower end surface of the concrete pier structure (2).

10. The energy pile raft foundation structure of claim 9, wherein, The waterproof coiled material layer (11) is also arranged on the outer peripheral wall of the pipe section of the heat exchange pipe (4) penetrating through the cushion layer structure (3), and the waterproof coiled material layer (11) is integrally connected with the waterproof coiled material layer (11) between the cushion layer structure (3) and the concrete pier structure (2).

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