Heterogeneous stratum reinforcing pipe pile and bearing platform connecting structure

Abstract

The utility model discloses a heterogeneous stratum reinforcing pipe pile and bearing platform connecting structure which comprises a pipe pile, a well cage and a supporting plate, a plurality of connecting hooks are fixed on the inner wall of the pipe pile, the connecting hooks are arranged at the designed installation positions of the bottom end of the well cage, and the connecting hooks can support the bottom end of the well cage. A plurality of connecting hooks are arranged on the inner wall of the pipe pile to support the bottom end of the well cage, so that the position of the bottom end of the well cage is limited, and the well cage is lowered to a designed mounting position. Reinforcing steel bars are prevented from being erected above the end opening of the pipe pile, construction of workers is facilitated, and construction safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe piles, in particular to a connection structure between a pipe pile for reinforcing heterogeneous strata and a bearing platform. Background Art

[0002] When constructing a connection structure between a reinforcing pipe pile and a bearing platform in a construction project, a supporting plate is first installed in the pipe pile; then a well cage is lowered into the pipe pile, and by erecting steel bars above the port of the pipe pile and passing the steel bars through the well cage, the well cage reaches the designed installation position; then concrete is poured into the pipe pile; finally, the pile is cut to meet the design requirements. Since the steel bars erected when the well cage is lowered protrude from the pipe pile in the existing connection structure, it is not conducive to the construction of workers and there are potential safety hazards. Summary of the Utility Model

[0003] The utility model provides a connection structure between a pipe pile for reinforcing heterogeneous strata and a bearing platform to solve the above technical problems.

[0004] To achieve the above object, the technical solution of the utility model is as follows:

[0005] A connection structure between a pipe pile for reinforcing heterogeneous strata and a bearing platform, comprising: a pipe pile, a well cage and a supporting plate. A plurality of connecting hooks are fixed on the inner wall of the pipe pile. The plurality of connecting hooks are arranged at the designed installation position at the bottom end of the well cage, and the connecting hooks can support the bottom end of the well cage.

[0006] Preferably, the plurality of connecting hooks are circumferentially and uniformly distributed on the inner wall of the pipe pile.

[0007] Preferably, the connecting hook is in an "L" shape, the short side of the connecting hook is fixed on the inner wall of the pipe pile, and the long side is arranged vertically upward.

[0008] Preferably, the well cage is also provided with anchoring steel bars.

[0009] Preferably, at least three limiting blocks are further fixed on the inner wall of the pipe pile. The limiting blocks are located below the connecting hooks, and the three limiting blocks form a positioning surface; the supporting plate is located between the connecting hooks and the positioning surface, and an elastic member is arranged between the supporting plate and the positioning surface. The lower end of the elastic member is fixedly connected with the limiting block, and the elastic member is used to support the supporting plate.

[0010] Preferably, it further includes a cushion layer, and the top end of the pipe pile passes through the cushion layer.

[0011] Advantageous Effects:

[0012] The connection structure between the pipe pile for reinforcing heterogeneous strata and the bearing platform disclosed in this application realizes the limitation of the position of the bottom end of the well cage by arranging a plurality of connecting hooks on the inner wall of the pipe pile to support the bottom end of the well cage, ensuring that the well cage is lowered to the designed installation position. It avoids erecting steel bars above the port of the pipe pile, facilitates the construction of workers, and ensures construction safety. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 Structural schematic diagram of a building foundation structure on a heterogeneous formation disclosed in Embodiment 1 of the present invention;

[0015] Figure 2 Structural schematic diagram of a deep pile of a building foundation structure on a heterogeneous formation disclosed in Embodiment 1 of the present invention;

[0016] Figure 3 Schematic diagram of the connection of additional reinforcement bars and stirrups of a building foundation structure on a heterogeneous formation disclosed in Embodiment 1 of the present invention through cross fasteners;

[0017] Figure 4 Structural schematic of the connection structure between a reinforced pipe pile for heterogeneous formation reinforcement and a bearing platform disclosed in Embodiment 2 of the present invention Figure 1 ;

[0018] Figure 5 Structural schematic of the connection structure between a reinforced pipe pile for heterogeneous formation reinforcement and a bearing platform disclosed in Embodiment 2 of the present invention Figure 2 ;

[0019] Figure 6 Structural schematic of the connection structure between a reinforced pipe pile for heterogeneous formation reinforcement and a bearing platform disclosed in Embodiment 2 of the present invention Figure 3 ;

[0020] Figure 7 Structural schematic diagram of the basement pile head waterproof structure in a heterogeneous formation disclosed in Embodiment 3 of the present invention;

[0021] Figure 8 For Figure 7 Partial enlarged view of A in;

[0022] Figure 9 Top view of the basement pile head waterproof structure in a heterogeneous formation disclosed in Embodiment 3 of the present invention;

[0023] Figure 10 Schematic diagram of the waterproof coiled material layer of the basement pile head waterproof structure in a heterogeneous formation disclosed in Embodiment 3 of the present invention;

[0024] Figure 11 Assembly schematic diagram of the water stop ring, anchor reinforcement, steel casing and clamp of the basement pile head waterproof structure in a heterogeneous formation disclosed in Embodiment 3 of the present invention.

[0025] 1. Raft foundation platform; 11. Raft foundation platform of raft foundation section; 111. Main body section; 112. Extension section; 12. Pile foundation platform of pile foundation section; 121. Upper platform; 122. Lower platform;

[0026] 21. Shallow pile; 22. Deep pile; 221. First pile foundation; 222. Second pile foundation; 223. Additional reinforcement; 224. Stirrup; 225. Cross fastener; 226. Anchor reinforcement; 23. Pipe pile; 24. Well cage; 25. Supporting plate; 26. Connecting hook; 27. Limiting block; 28. Elastic part;

[0027] 31. Soft soil layer; 32. Hard rock layer; 33. Plain fill layer; 4. Cushion layer;

[0028] 51. First waterproof layer; 52. Second waterproof layer; 531. First side wall; 532. Second side wall; 533. Bottom plane of the groove;

[0029] 61. Waterproof coiled material; 62. Additional waterproof coiled material; 63. First sealant; 64. Water stop ring; 65. Second sealant; 66. Steel casing; 67. Clamp;

[0030] 7. Load-bearing column. Detailed implementation mode

[0031] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] Embodiment 1

[0033] A building foundation structure on a heterogeneous formation, combined with Figure 1 、 Figure 2 and Figure 3As shown in the figure, it includes a bearing platform 1, a pile foundation, and several load-bearing columns 7. The bearing platform 1 includes a raft foundation section bearing platform 11 and a pile foundation section bearing platform 12; the raft foundation section bearing platform 11 includes a main section 111 and an extension section 112 extending from the side wall of the main section 111. The pile foundation section bearing platform 12 includes an upper bearing platform 121 and a lower bearing platform 122 located on the upper and lower sides of the extension section 112; the side wall of the main section 111 abuts against the side wall of the lower bearing platform 122. The upper surface of the main section 111 is higher than the upper surface of the lower bearing platform 122, and the extension section 112 covers the upper surface of the lower bearing platform 122; the upper surface of the upper bearing platform 121 is flush with the upper surface of the main section 111. The upper bearing platform 121 abuts against the side wall of the main section 111. The distance between the end of the upper bearing platform 121 far from the main section 111 and the main section 111 is less than the distance between the end of the lower bearing platform 122 far from the main section 111 and the main section 111; several load-bearing columns 7 are arranged on the upper surface of the upper bearing platform 121 for supporting the house; the pile foundation includes shallow piles 21 and deep piles 22. The shallow piles 21 and deep piles 22 support the lower bearing platform 122, and the shallow piles 21 are located between the deep piles 22 and the main section 111.

[0034] Firstly, by reasonably selecting the foundation type and adopting the raft foundation section bearing platform 11 and the pile foundation section bearing platform 12 in different regions, the weight distribution of the building foundation is adjusted, and the unbalanced effect of the bearing platform 1 when subjected to lateral forces is reduced, thereby enhancing the overall stability. Secondly, by adjusting the specific layout of the pile foundation, shallow piles 21 are used on the side prone to settlement, and deep piles 22 are used on the side prone to uplift. They not only bear the vertical load but also can resist the horizontal force through their deep anchoring effect, effectively resisting the possible overturning moment, and then ensuring the stability of the bearing platform 1 and several load-bearing columns 7. These comprehensive measures work together to ensure the stability and reliability of the bearing platform 1 and the load-bearing columns 7 in various complex environments, making the entire building foundation stable, firm, and safe; at the same time, it also provides a solid guarantee for the safe loading and unloading of goods, is conducive to improving the efficiency of loading and unloading operations, and makes the logistics transportation of the project smoother.

[0035] Preferably, the raft foundation section bearing platform 11 adopts the raft foundation steel bar binding process. The lightweight raft foundation steel bar binding process is used on the higher side and covers the entire foundation, which not only reduces the weight of this area but also helps to disperse the load and can also achieve a tight combination with the pile foundation section bearing platform 12. The pile foundation section bearing platform 12 adopts the pile foundation bearing platform steel bar binding process. This foundation can penetrate deep into the ground, provide stronger support force, and has good economic benefits. The raft foundation section bearing platform 11 and the pile foundation section bearing platform 12 are integrally cast. The raft foundation section bearing platform 11 and the pile foundation section bearing platform 12 are combined through different steel bar binding technologies to ensure the overall strength and stability after integral casting.

[0036] Preferably, the deep pile 22 includes a first pile foundation 221 and a second pile foundation 222. The first pile foundation 221 is located between the shallow pile 21 and the second pile foundation 222. The first pile foundation 221 and the second pile foundation 222 are connected by a number of additional reinforcing bars 223. The additional reinforcing bars 223 are respectively connected to the stirrups 224 of the first pile foundation 221 and the stirrups 224 of the second pile foundation 222 through connection components. By adding additional reinforcing bars 223 to connect the first pile foundation 221 and the second pile foundation 222, the tensile and uplift effect of the deep pile 22 is fully utilized to resist the tendency of inclination.

[0037] Preferably, the connection component adopts a cross fastener 225 to ensure the tight combination of the additional reinforcing bar 223 and the stirrup 224.

[0038] Preferably, the shallow pile 21, the first pile foundation 221 and the second pile foundation 222 all adopt end-bearing piles, so that they can well bear the vertical load transmitted by the bearing platform 1.

[0039] Preferably, the bearing platform 1 is arranged on the soft soil layer 31, and the shallow pile 21, the first pile foundation 221 and the second pile foundation 222 extend to the hard rock layer 32, so that the pile foundation can be more firmly embedded in the formation, thereby greatly improving its tensile and uplift performance, ensuring that even under extreme conditions, the bearing platform 1 can remain stable and no adverse inclination phenomenon will occur.

[0040] Embodiment 2

[0041] The difference between this embodiment and Embodiment 1 is that the shallow pile 21 is connected through a connecting structure of a heterogeneous formation reinforced pipe pile and the bearing platform.

[0042] Combined Figure 4 、 Figure 5 and Figure 6 As shown in, the connecting structure of the heterogeneous formation reinforced pipe pile and the bearing platform includes: a pipe pile 23, a well cage 24 and a supporting plate 25. A number of connecting hooks 26 are fixed on the inner wall of the pipe pile 23. The number of connecting hooks 26 is arranged at the designed installation position at the bottom end of the well cage 24. The connecting hooks 26 can support the bottom end of the well cage 24. By arranging a number of connecting hooks 26 on the inner wall of the pipe pile 23 to support the bottom end of the well cage 24, the limitation of the bottom end position of the well cage 24 is realized, and the well cage 24 is ensured to be lowered to the designed installation position. It avoids erecting steel bars above the port of the pipe pile 23, which is convenient for workers to construct, improves the construction efficiency and ensures the construction safety.

[0043] Preferably, a number of connecting hooks 26 are circumferentially distributed on the inner wall of the pipe pile 23, so that the connecting hooks 26 can support the bottom end of the well cage 24 evenly and reliably.

[0044] Preferably, the connecting hook 26 is in an "L" shape. The short side of the connecting hook 26 is fixed to the inner wall of the pipe pile 23, and the long side is arranged vertically upward. When the well cage 24 is lowered, it can be sleeved on the long sides of a plurality of connecting hooks 26, playing a certain positioning role to prevent the well cage 24 from shaking.

[0045] Specifically, the pipe pile 23 is a steel pipe pile, and the end of the short side of the connecting hook 26 is welded and fixed to the inner wall of the pipe pile 23.

[0046] Preferably, the well cage 24 is also provided with anchor bars 226, and the anchor bars 226 are buried in the bearing platform 1 to strengthen the connection between the pile foundation and the bearing platform 1.

[0047] Preferably, at least three limiting blocks 27 are further fixed to the inner wall of the pipe pile 23. The limiting blocks 27 are located below the connecting hook 26, and the three limiting blocks 27 form a positioning surface; the support plate 25 is located between the connecting hook 26 and the positioning surface, and an elastic member 28 is arranged between the support plate 25 and the positioning surface. The lower end of the elastic member 28 is fixedly connected to the limiting block 27, and the elastic member 28 is used to support the support plate 25. Under the action of the poured concrete, the support plate 25 continuously compresses the elastic member 28 and continuously sinks until the support plate 25 abuts against the limiting block 27 and then the support plate 25 stops descending. Compared with the previous manual throwing, this structure can place the support plate 25 at the specified position more accurately, making this connection structure more stable after pouring concrete.

[0048] Specifically, the limiting block 27 is welded and fixed to the inner wall of the pipe pile 23, and the elastic member 28 is a single-layer corrugated spring, and the lower end of the spring is welded and fixed to the upper surface of the limiting block 27.

[0049] Preferably, it further includes a cushion layer 4, and the top end of the pipe pile 23 passes through the cushion layer 4.

[0050] Embodiment 3

[0051] The difference between this embodiment and Embodiment 1 is that a waterproof structure for the basement pile head in the non-uniform stratum is also provided between the pile foundation and the bearing platform 1.

[0052] Combined with Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11As shown in the figure, the waterproof structure of the basement pile head in the heterogeneous formation includes: pile foundation, pile cap 1, cushion layer 4, waterproof coiled material layer, first waterproof layer 51, and anchor reinforcement bars 226. The cushion layer 4 is provided with a groove that surrounds the head of the pile foundation. The two side walls of the groove are inclined planes, and the side wall of the groove close to the pile foundation is connected to the outer peripheral surface of the pile foundation head. Above the pile foundation head, a second waterproof layer 52 is also constructed. The second waterproof layer 52 extends beyond the edge of the pile foundation head and is connected to the end of the first waterproof layer 51 facing the pile foundation. This waterproof structure avoids water seepage from the side wall of the pile head by setting a groove on the cushion layer 4 and then laying a waterproof coiled material layer, the first waterproof layer 51, and the second waterproof layer 52. The second waterproof layer 52 is connected and sealed with the first waterproof layer 51.

[0053] Preferably, the groove includes: a first side wall 531, a second side wall 532, and a bottom plane 533 of the groove. The first side wall 531 slopes downward and then connects to one end of the bottom plane 533 away from the pile foundation. One end of the bottom plane 533 facing the pile foundation slopes upward and then connects to the second side wall 532. The end of the second side wall 532 away from the bottom plane 533 is connected to the outer peripheral surface of the pile foundation head. The setting of the groove avoids water flowing obliquely downward along the waterproof coiled material layer to the connection gap between the waterproof coiled material layer and the side wall of the pile head, thereby avoiding leakage due to the shrinkage of the concrete itself resulting in gaps around the pile head.

[0054] Preferably, the first waterproof layer 51 is a 50 - mm - thick polymer cement waterproof mortar layer with a ratio of 1:2, and the second waterproof layer 52 is a 50 - mm - thick polymer cement waterproof mortar layer with a ratio of 1:2.5.

[0055] Specifically, the second waterproof layer 52 overlaps on the first waterproof layer 51, covering the connection position between the first waterproof layer 51 and the side wall of the pile foundation. After the first waterproof layer 51 and the second waterproof layer 52 are constructed, they solidify together to form a good connection and seal.

[0056] Preferably, the waterproof coiled material layer includes a waterproof coiled material 61 and an additional waterproof coiled material 62. The waterproof coiled material 61 is constructed on the entire cushion layer 4, and the additional waterproof coiled material 62 is constructed on the waterproof coiled material 61 and is located above the groove to strengthen the waterproof ability of the groove part.

[0057] Preferably, a first sealant 63 is applied between the waterproof coiled material layer and the outer peripheral surface of the pile foundation head to prevent gaps from appearing at the connection between the waterproof coiled material layer and the side wall of the pile head due to the shrinkage of the concrete itself.

[0058] Specifically, the first sealant 63 uses a one - component polyurethane sealant, which has excellent adhesion performance and weather resistance and can effectively prevent water penetration.

[0059] Preferably, a plain fill layer 33 is constructed under the cushion layer 4 to form an initial groove shape, which is convenient for constructing the cushion layer 4.

[0060] Preferably, a water stop ring 64 is provided on the anchoring steel bar 226, and the water stop ring 64 is made of water-swelling rubber material. When the water stop ring 64 encounters moisture, it will rapidly expand and closely adhere to the surface of the anchoring steel bar 226, thereby forming an effective waterproof barrier to prevent water penetration.

[0061] Preferably, the bottom of the water stop ring 64 is bonded to the second waterproof layer 52 through a second sealant 65 to fix the water stop ring 64. In this embodiment, the second sealant 65 also uses a one-component polyurethane sealant.

[0062] Preferably, a steel casing 66 is sleeved outside the water stop ring 64, and a clamp 67 is installed on the outer circumference of the steel casing 66. This is to prevent the water stop ring 64 from excessive water absorption, which may cause changes in its shape and size, or even displacement, thus affecting its normal waterproof effect.

[0063] Embodiment 4

[0064] This embodiment provides a construction method for a building foundation structure on a heterogeneous stratum, including the following steps:

[0065] S1. Construct shallow piles and deep piles:

[0066] S11. Construct shallow piles:

[0067] Weld connection hooks on the inner wall of the pipe pile, and place the supporting plate into the pipe pile; then weld the spring on the limiting block, and then install the spring and the limiting block into the pipe pile, and fix the limiting block on the inner wall of the pipe pile by welding.

[0068] Clean the construction area, drill holes using a drill rig, and drive the pipe pile into the ground according to the design requirements until reaching the hard rock layer, and ensure that the pipe pile depths of the shallow piles and the deep piles reach the design depths respectively and maintain verticality.

[0069] Lift the well cage by a crane and lower it into the pipe pile until the connection hook supports the well cage.

[0070] Pour C35 concrete into the pipe pile. Under the gravity of the C35 concrete, the supporting plate continuously sinks, and the spring is continuously compressed until the spring is flattened and the supporting plate stops sinking after abutting against the limiting block. Stop pouring the C35 concrete when it reaches the bottom end of the well cage.

[0071] Immediately carry out concrete pouring after the well cage inspection is completed. When pouring concrete, process operations such as vibration, flushing, and compaction need to be carried out simultaneously.

[0072] After the pouring is completed, curing and strength testing are required to ensure the quality and stability of the shallow piles.

[0073] S12. Construct deep piles:

[0074] Positioning and setting out the lines, excavating the soil mass to obtain the pile holes for installing the first pile foundation and the second pile foundation.

[0075] Hoist and place the steel reinforcement cages of the first pile foundation and the second pile foundation by a crane, and fix the additional reinforcement bars on the steel reinforcement cages of the first pile foundation and the second pile foundation by cross fasteners.

[0076] Backfill the soil between the steel reinforcement cages, and then pour concrete, and cure and form to obtain the deep piles.

[0077] S2. Compact the plain fill soil around the shallow piles and the deep piles to obtain the plain fill soil layer, and construct the initial contour of the groove on the plain fill soil layer to provide a basis for subsequent work. Then pour C15 concrete on the plain fill soil layer to obtain the cushion layer.

[0078] Lay the waterproof coiled material on the cushion layer, and lay the additional waterproof coiled material at the position corresponding to the groove on the waterproof coiled material; during the laying process, it is necessary to ensure that the coiled material is flat and has no wrinkles to maximize its waterproof performance. Apply one-component polyurethane sealant at the connection between the waterproof coiled material, the additional waterproof coiled material and the outer periphery of the pile for bonding and sealing.

[0079] Use 50-mm-thick 1:2 polymer cement waterproof mortar to level and form the first waterproof layer, manually clean the pile head, wash away the miscellaneous soil, and use 50-mm-thick 1:2.5 polymer cement waterproof mortar to level and form the second waterproof layer at the pile head. The second waterproof layer extends outward beyond the edge of the pile head and is leveled onto the first waterproof layer.

[0080] Set a water stop ring on the anchor reinforcement bar, bond the water stop ring to the second waterproof layer by one-component polyurethane sealant; set a steel casing outside the water stop ring and tighten the steel casing with a clamp.

[0081] S5. Bind the steel reinforcement cage of the lower bearing platform of the pile foundation section on the upper part of the shallow piles and the deep piles.

[0082] S6. Bind the steel reinforcement cage of the main section of the raft foundation section on the side of the steel reinforcement cage of the lower bearing platform, and bind the steel reinforcement cage of the extension section of the raft foundation section on the upper part of the steel reinforcement cage of the lower bearing platform.

[0083] S7. Bind the steel reinforcement cage of the upper bearing platform of the pile foundation section on the upper part of the steel reinforcement cage of the extension section.

[0084] S8. Pour concrete integrally to construct the bearing platform.

[0085] S9. Bind the steel reinforcement cage of the load-bearing column on the upper bearing platform and install the formed formwork of the load-bearing column, and pour concrete to construct the load-bearing column;

[0086] S10. Remove the formed formwork of the load-bearing column.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The connection structure between the pipe pile and the cap for strengthening the heterogeneous stratum includes: A pipe pile (23), a well cage (24) and a support plate (25), characterized in that a plurality of connecting hooks (26) are fixed to the inner wall of the pipe pile (23), and the plurality of connecting hooks (26) are arranged at the designed installation position at the bottom end of the well cage (24), and the connecting hooks (26) can support the bottom end of the well cage (24).

2. The connection structure of the heterogeneous stratum reinforcement pipe pile and the cap according to claim 1 is characterized in that: A plurality of connecting hooks (26) are evenly distributed on the inner wall of the pipe pile (23) around the circumference.

3. The connection structure of the heterogeneous stratum reinforcement pipe pile and the cap according to claim 1 is characterized in that: The connecting hook (26) is in an "L" shape, with the short side of the connecting hook (26) being fixed to the inner wall of the pipe pile (23) and the long side being arranged vertically upward.

4. The connection structure of the heterogeneous stratum reinforcement pipe pile and the cap according to claim 1 is characterized in that: Anchoring steel bars (226) are also provided on the well cage (24).

5. The connection structure of the heterogeneous stratum reinforcement pipe pile and the cap according to claim 1 is characterized in that: At least three limit blocks (27) are fixed to the inner wall of the pipe pile (23), and the limit blocks (27) are located below the connecting hook (26). The three limit blocks (27) form a positioning surface; the support plate (25) is located between the connecting hook (26) and the positioning surface, and an elastic member (28) is provided between the support plate (25) and the positioning surface. The lower end of the elastic member (28) is fixedly connected to the limit block (27), and the elastic member (28) is used to support the support plate (25).

6. The connection structure of the heterogeneous stratum reinforcement pipe pile and the cap according to claim 1, characterized in that: It also comprises a cushion layer (4), and the top end of the pipe pile (23) passes through the cushion layer (4).

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