A support reinforcement structure for connecting prestressed pipe piles and waist beams

Abstract

The utility model discloses a support and reinforcement structure for connecting a prestressed pipe pile with a waist beam, the support and reinforcement structure includes a connecting tie steel bar, a first hook, and a second hook, the first hook and the second hook are respectively located at both ends of the connecting tie steel bar and are fixedly connected with the connecting tie steel bar to form an integrated steel bar structure, the top of the prestressed pipe pile is provided with a crown beam, the middle of the prestressed pipe pile is provided with a waist beam, the connecting tie steel bar is arranged between the crown beam and the waist beam, and the connecting tie steel bar is anchored into the inside of the crown beam and the waist beam through the first hook and the second hook at both ends. The support and reinforcement structure of the utility model can use the crown beam to provide an upward restraining force for the waist beam through the connecting tie steel bar, is firm and reliable, plays an anti-slip role, effectively resists the slippage of the concrete waist beam, and plays a reinforcing role in protecting the waist beam structure.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit and slope support, in particular to a support reinforcement structure used for connecting prestressed pipe piles with waist beams. Background Art

[0002] Prestressed pipe piles are usually used for foundation pit support, slope support and landslide control to withstand horizontal soil pressure or landslide thrust.

[0003] Existing prestressed pipe piles often need to be equipped with waist beams. The construction process for connecting the waist beams with the prestressed pipe piles is usually to pour concrete into the hollow part of the prestressed concrete pipe piles at the casting position of the waist beams of the prestressed pipe piles, and then connect the waist beams by roughening the pile body and planting reinforcement. The traditional connection structure of prestressed concrete pipe piles and waist beams has the following shortcomings:

[0004] 1) Due to the high concrete strength of prestressed concrete pipe piles and the presence of prestress inside the pile body, the pile body of prestressed concrete pipe piles is not suitable for roughening and rebar planting. In addition, the surface of prestressed concrete pipe piles is relatively smooth, resulting in the inability of the waist beam concrete itself to form a reliable connection with the pipe piles;

[0005] 2) During the curing period, the waist beam concrete is subjected to gravity before the anchor cables are prestressed, which makes it very easy for the waist beam to slide downward, settle unevenly, and form vertical cracks. The existing construction waist beam slides downward, which will cause micro cracks in the waist beam and change the vertical stress surface angle of the anchor plate base, making it impossible to form an overall consistent stress angle. When the anchor cables are prestressed in the later stage, the waist beam will slide down, crack, and deform, which will have an adverse effect on the overall stress system of the foundation pit support, resulting in safety hazards during the foundation pit excavation stage and the main structure construction stage. Utility Model Content

[0006] In view of the problems existing in the prior art, the technical problem to be solved by the utility model is to provide a support and reinforcement structure which, by setting connecting tie steel bars, solves the problem that the prestressed pipe pile body is not suitable for roughening and rebar planting and cannot be used as a rebar anchoring object, can ensure that the waist beam has an upward restraining force, so that the prestressed pipe piles can play a role in stabilizing the vertical position of the waist beam and ensure that the waist beam does not slide down or deform.

[0007] In order to solve the above technical problems, the utility model provides a support and reinforcement structure for connecting prestressed pipe piles with waist beams, including a support and reinforcement structure for connecting prestressed pipe piles with waist beams, the support and reinforcement structure including connecting tie steel bars, a first hook, and a second hook, the first hook and the second hook are respectively located at both ends of the connecting tie steel bars and are fixedly connected with the connecting tie steel bars to form an integrated steel bar structure, the top of the prestressed pipe pile is provided with a crown beam, the middle of the prestressed pipe pile is provided with a waist beam, the connecting tie steel bars are arranged between the crown beam and the waist beam, and the connecting tie steel bars are respectively connected to the crown beam and the waist beam through the first hook and the second hook at both ends.

[0008] Furthermore, the connecting tie steel bars are C12 threaded steel bars, the spacing between the C12 threaded steel bars is 1.4m, and the first hook and the second hook are arc-shaped hooks.

[0009] Furthermore, the crown beam is tied with crown beam main reinforcement inside, and the connecting tie steel bar is hooked with the crown beam main reinforcement inside the crown beam through the first hook.

[0010] Furthermore, a crown beam template is installed on the side of the crown beam, and the crown beam template is located on the side of the main reinforcement of the crown beam.

[0011] Furthermore, horizontal steel bars are tied inside the waist beam, and the connecting tie steel bars are hooked on the horizontal steel bars inside the waist beam through the second hook.

[0012] Furthermore, a waist beam reinforcement cage is inlaid on the edge of the waist beam, and the waist beam reinforcement cage is composed of waist beam stirrups tied around the horizontal reinforcements.

[0013] Furthermore, the prestressed pipe pile is a PHC prestressed concrete pipe pile, the crown beam is fixed to the top of the prestressed pipe pile, and the waist beam is arranged at a vertical distance of 2.1m below the crown beam.

[0014] Furthermore, a steel mesh is implanted inside the top of the prestressed pipe pile, and the top of the prestressed pipe pile is connected to the main reinforcement of the crown beam through the steel mesh.

[0015] Furthermore, the support and reinforcement structure includes a first anchor cable, one end of which is fixedly connected to a first anchor head, one end of which passes through a crown beam at the top of the prestressed pipe pile and is fixed to the crown beam through the first anchor head, and the other end of the first anchor cable extends to the other side of the prestressed pipe pile.

[0016] Furthermore, the support and reinforcement structure includes a second anchor cable, which is located below the first anchor cable, one end of the second anchor cable is fixedly connected to a second anchor head, one end of the second anchor cable passes through the waist beam and is fixed to the outside of the waist beam through the second anchor head, and the other end of the second anchor cable extends to the other side of the prestressed pipe pile.

[0017] Compared with the prior art, the solution of the utility model has at least the following beneficial effects:

[0018] The support and reinforcement structure of the utility model includes connecting tie steel bars, a first hook, and a second hook. The first hook and the second hook are respectively located at the two ends of the connecting tie steel bars and are fixedly connected with the connecting tie steel bars to form an integrated steel bar structure. The top of the prestressed pipe pile is provided with a crown beam, and the middle of the prestressed pipe pile is provided with a waist beam. The connecting tie steel bars are arranged between the crown beam and the waist beam, and the connecting tie steel bars are anchored into the inside of the crown beam and the waist beam through the first hook and the second hook at both ends. The support and reinforcement structure provided by the utility model can change the construction method of the traditional waist beam connection, solve the problem that the pile body of the prestressed concrete pipe pile is not suitable as a reinforcement anchoring object, and can also avoid the destruction of the prestressed structure of the pipe pile itself caused by drilling and rebar planting in the prestressed concrete pipe pile. The connecting tie steel bars provided can use the crown beam to provide an upward restraining force for the waist beam, which is strong and reliable, plays an anti-slip role, effectively resists the sliding of the concrete waist beam, and has a significant effect on protecting the integrity of the waist beam structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0020] Figure 1 It is a schematic diagram of the connection relationship between the prestressed pipe piles, the crown beam, the waist beam and the support reinforcement structure of the utility model;

[0021] Figure 2 It is a large-scale drawing of the vertical tie steel bar construction of the utility model;

[0022] Figure 3 It is a large-scale drawing of the connection between the vertical tie steel bars and the crown beam of the utility model.

[0023] In the figure: prestressed pipe pile 1, steel mesh 11, connecting tie steel bar 2, first hook 21, second hook 22, crown beam 3, crown beam main reinforcement 31, waist beam 4, horizontal reinforcement 41, waist beam reinforcement cage 42, first anchor cable 5, second anchor cable 6. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-3As shown, the first embodiment of the utility model provides a support and reinforcement structure for connecting a prestressed pipe pile 1 with a waist beam 4. The support and reinforcement structure is mainly used for connecting the prestressed pipe pile 1 with the waist beam 4. The support and reinforcement structure includes a connecting tie steel bar 2, a first hook 21, and a second hook 22. The first hook 21 and the second hook 22 are respectively located at both ends of the connecting tie steel bar 2 and are fixedly connected to the connecting tie steel bar 2 to form an integrated steel bar structure. The top of the prestressed pipe pile 1 is provided with a crown beam 3, and the middle part of the prestressed pipe pile 1 is provided with a waist beam 4. The connecting tie steel bar 2 is arranged between the crown beam 3 and the waist beam 4. The connecting tie steel bar 2 is connected to the crown beam 3 and the waist beam 4 through the first hook 21 and the second hook 22 at both ends. When the embodiment of the utility model is implemented, the connecting tie steel bar 2 is selected from C12 threaded steel bars, C1 2 The spacing between the threaded steel bars is 1.4m, the first hook 21 and the second hook 22 are arc-shaped hooks, and the first hook 21 and the second hook 22 at both ends of the connecting tie steel bar 2 are anchored into the crown beam 3 and the waist beam 4 respectively, and the depth of anchoring into the crown beam 3 and the waist beam 4 is 40cm. The support and reinforcement structure of the utility model can change the traditional practice of horizontally anchoring the waist beam 4 into the prestressed pipe pile 1 by setting the connecting tie steel bar 2, and solve the problem that the prestressed pipe pile 1 is not suitable for roughening and anchoring the steel bars, and cannot be used as the object of anchoring the steel bars, and can ensure that the waist beam 4 has an upward constraint force, so that the prestressed pipe pile 1 plays a role in stabilizing the vertical position of the waist beam 4, ensuring that the waist beam 4 does not slide down or deform, so that the waist beam 4 can better play the role of the foundation pit support system, and can better support the foundation pit and improve the safety of the foundation pit support.

[0026] In specific implementation, the prestressed pipe pile 1 of the utility model is a PHC large-diameter prestressed concrete pipe pile. The diameter of the prestressed pipe pile 1 is 1000 mm, the pile spacing between two adjacent prestressed pipe piles 1 is 1400 mm, the crown beam 3 is fixed to the pile top of the prestressed pipe pile 1, and the waist beam 4 is arranged at a vertical distance of 2.1 m below the crown beam 3.

[0027] In the utility model, a crown beam main reinforcement 31 is tied inside the crown beam 3, and the connecting tie steel bar 2 is hooked to the crown beam main reinforcement 31 inside the crown beam 3 through the first hook 21. A crown beam template is installed on the side of the crown beam 3, and the crown beam template is located on the side of the crown beam main reinforcement 31. A horizontal reinforcement 41 is tied inside the waist beam 4, and the connecting tie steel bar 2 is hooked to the horizontal reinforcement 41 inside the waist beam 4 through the second hook 22. A waist beam reinforcement cage 42 is inlaid on the edge of the waist beam 4, and the waist beam reinforcement cage 42 is composed of waist beam 4 stirrups tied around the horizontal reinforcement 41. In specific implementation, the connecting tie steel bar 2 is welded to the crown beam main reinforcement 31 inside the crown beam 3 through the first hook 21, and the connecting tie steel bar 2 is welded to the horizontal reinforcement 41 of the waist beam 4 through the second hook 22. The welding method can form a reliable connection between the connecting tie steel bar 2 and the crown beam 3 and the waist beam 4, ensuring that the waist beam 4 will not be displaced during the concrete pouring process.

[0028] In the utility model, a steel mesh 11 is implanted inside the pile top of the prestressed pipe pile 1 , and the pile top of the prestressed pipe pile 1 is connected to the main reinforcement 31 of the crown beam through the steel mesh 11 .

[0029] When the embodiment of the utility model is specifically implemented, the support reinforcement structure includes a first anchor cable 5, one end of the first anchor cable 5 is fixedly connected to the first anchor head, one end of the first anchor cable 5 passes through the crown beam 3 of the top of the prestressed pipe pile 1 and is fixed to the crown beam 3 through the first anchor head, and the other end of the first anchor cable 5 extends to the other side of the prestressed pipe pile 1, and the support reinforcement structure includes a second anchor cable 6, the second anchor cable 6 is located below the first anchor cable 5, one end of the second anchor cable 6 is fixedly connected to the second anchor head, one end of the second anchor cable 6 passes through the waist beam 4 and is fixed to the outside of the waist beam 4 through the second anchor head, and the other end of the second anchor cable 6 extends to the other side of the prestressed pipe pile 1. Among them, the first anchor cable 5 is made of 3*15Φ2mm steel stranded wire, the standard value of the axial tension of the first anchor cable 5 is 300KN, the locking force is 250KN, the length is L=20m@1.4m, the free section of the first anchor cable 5 is 7m, and the anchoring section of the first anchor cable 5 is 13m. The installed second anchor cable 6 is made of 3*15Φ2mm steel strand, the standard value of the axial tension of the second anchor cable 6 is 300KN, the locking force is 250KN, the length is 16m@2.8m, the free section of the second anchor cable 6 is 5m, and the anchoring section of the second anchor cable 6 is 11m. After the supporting reinforcement structure of the utility model is set to add the connecting tie steel bar 2, the waist beam 4 is subjected to gravity, the tension provided by the connecting tie steel bar 2, the prestress of the second anchor cable 6, and the reaction force of the prestressed pipe pile 1 on the waist beam 4, so that the waist beam 4 is in a force balance state.

[0030] Compared with the prior art, the technical solution disclosed in the above embodiment has the following beneficial effects:

[0031] In the above embodiment, the support and reinforcement structure of the utility model is provided with connecting tie steel bars 2, a first hook 21, and a second hook 22. The first hook 21 and the second hook 22 are respectively located at the two ends of the connecting tie steel bars 2 and are fixedly connected with the connecting tie steel bars 2 to form an integrated steel bar structure. The connecting tie steel bars 2 are anchored into the inside of the crown beam 3 and the waist beam 4 through the first hooks 21 and the second hooks 22 at both ends. After the connecting tie steel bars 2 are constructed between the crown beam 3 and the waist beam 4, the waist beam 4 is subjected to gravity, the tension provided by the connecting tie steel bars 2, the prestress of the second anchor cable 6, and the reaction force of the prestressed pipe pile 1 on the waist beam 4, forming a force balance, changing the unbalanced force state of the waist beam 4, and enabling the waist beam 4 to better play the role of the foundation pit support system. The support and reinforcement structure of the utility model can enhance the stability of the connection between the prestressed pipe pile 1 and the waist beam 4, and can effectively reduce the construction costs such as planting reinforcement and roughening.

[0032] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A support and reinforcement structure for connecting prestressed pipe piles with waist beams, characterized in that: It includes a support and reinforcement structure for connecting a prestressed pipe pile and a waist beam, the support and reinforcement structure includes a connecting tie steel bar, a first hook, and a second hook, the first hook and the second hook are respectively located at both ends of the connecting tie steel bar and are fixedly connected to the connecting tie steel bar to form an integrated steel bar structure, the top of the prestressed pipe pile is provided with a crown beam, the middle of the prestressed pipe pile is provided with a waist beam, the connecting tie steel bar is arranged between the crown beam and the waist beam, and the connecting tie steel bar is respectively connected to the crown beam and the waist beam through the first hook and the second hook at both ends.

2. The support and reinforcement structure for connecting prestressed pipe piles and waist beams according to claim 1 is characterized in that: The connecting tie steel bars are C12 threaded steel bars, the spacing between the C12 threaded steel bars is 1.4m, and the first hook and the second hook are arc-shaped hooks.

3. The support and reinforcement structure for connecting prestressed pipe piles and waist beams according to claim 2 is characterized in that: The crown beam main reinforcement is tied inside the crown beam, and the connecting tie steel bar is hooked on the crown beam main reinforcement inside the crown beam through the first hook.

4. The support and reinforcement structure for connecting prestressed pipe piles and waist beams according to claim 3 is characterized in that: A crown beam template is installed on the side of the crown beam, and the crown beam template is located on the side of the main reinforcement of the crown beam.

5. The support and reinforcement structure for connecting prestressed pipe piles and waist beams according to claim 2 is characterized in that: Horizontal steel bars are tied inside the waist beam, and the connecting tie steel bars are hooked on the horizontal steel bars inside the waist beam through the second hook.

6. The support and reinforcement structure for connecting prestressed pipe piles and waist beams according to claim 5 is characterized in that: The edge of the waist beam is inlaid with a waist beam steel cage, and the waist beam steel cage is composed of waist beam stirrups tied around the horizontal steel bars.

7. The support and reinforcement structure for connecting prestressed pipe piles and waist beams according to claim 1, characterized in that: The prestressed pipe pile is a PHC prestressed concrete pipe pile, the cap beam is fixed to the top of the prestressed pipe pile, and the waist beam is arranged at a vertical distance of 2.1m below the cap beam.

8. The support and reinforcement structure for connecting prestressed pipe piles and waist beams according to claim 7 is characterized in that: A steel mesh is implanted inside the top of the prestressed pipe pile, and the top of the prestressed pipe pile is connected to the main reinforcement of the crown beam through the steel mesh.

9. The support and reinforcement structure for connecting prestressed pipe piles and waist beams according to claim 1, characterized in that: The support reinforcement structure includes a first anchor cable, one end of which is fixedly connected to a first anchor head, one end of which passes through a crown beam at the top of the prestressed pipe pile and is fixed to the crown beam through the first anchor head, and the other end of the first anchor cable extends to the other side of the prestressed pipe pile.

10. The support and reinforcement structure for connecting prestressed pipe piles and waist beams according to claim 1, characterized in that: The support and reinforcement structure includes a second anchor cable, which is located below the first anchor cable. One end of the second anchor cable is fixedly connected to a second anchor head. One end of the second anchor cable passes through the waist beam and is fixed to the outside of the waist beam through the second anchor head. The other end of the second anchor cable extends to the other side of the prestressed pipe pile.

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