Strengthening device for pile steel casing in bead type karst cave development area

Abstract

The utility model relates to the technical field of pile foundation structures, in particular to a pile steel casing reinforcing device in a bead type karst cave development area, and provides a practical device for construction of a cast-in-place pile foundation in the bead type karst cave development karst area by adopting a steel casing follow-up method. The device is characterized in that reinforcing blocks are fixedly connected to the outer side of an outer pile casing at equal intervals, reinforcing blocks are fixedly connected to the inner wall of the outer pile casing at equal angles, and one end of each reinforcing block is fixedly connected with an inner pile casing. The contact road holding force of the outer pile casing and the non-soil-dissolving hole section in the depth direction of the karst area can be increased through the reinforcing blocks and the clamping blocks, the firmness and stability of the outer pile casing in the karst area after installation are effectively improved, the overall rigidity of the outer pile casing and the inner pile casing after connection and installation can be improved through the built-in reinforcing blocks, and the service life of the outer pile casing and the inner pile casing is prolonged. And tight combination of the upper pile casing and the lower pile casing is guaranteed through a reserved groove. In conclusion, the construction quality of the pile foundation can be further improved, the grouting amount is reduced, the hole forming difficulty is overcome, the hole forming quality is improved, and the construction problems of slurry leakage, hole forming difficulty and the like of the pile foundation in the karst area are more effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation structure, and is a cast-in-place pile foundation constructed by a steel casing follow-up method in a karst area with developed beaded caves, and specifically relates to a pile steel casing reinforcement device in the area with developed beaded caves. Background Art

[0002] Pile foundation is a kind of foundation that uses piles and caps to transfer the load of the upper building to the deep bearing layer with greater bearing capacity. When constructing cast-in-place pile foundation in karst areas with developed beaded caves, the steel casing follow-up method is a more commonly used pile construction method.

[0003] After searching, the existing patent (Announcement No.: CN220550544U) discloses a beaded cave pile foundation structure, which belongs to the field of cave treatment technology and solves the problem that beaded caves are difficult to treat. The utility model includes an inner casing assembly and an outer casing assembly. The outer casing assembly is composed of a plurality of outer casing units connected in sequence. The diameter of the outer casing units decreases from top to bottom, and adjacent outer casing units overlap each other; the inner casing assembly is sleeved inside the outer casing assembly, and the inner casing assembly is grouted to form a pile foundation. The utility model can effectively improve the safety of pile foundation construction and improve the quality of pile foundation construction, reduce the amount of grouting, improve the quality of hole formation, save construction costs, and effectively solve the construction problems such as hole collapse and grout leakage that are prone to occur in pile foundation construction in karst areas.

[0004] However, in the above scheme, the ground grip tightness between the outer casing and the karst geology is poor. The outer casing is usually cylindrical, and the contact area between its outer surface and the karst geology is small, which makes it impossible to improve the ground grip tightness between the outer casing and the karst geology, which is not conducive to the firm protection and support of the pile foundation.

[0005] In view of this, the utility model proposes a pile steel casing reinforcement device for areas where beaded caves are developed. Utility Model Content

[0006] The utility model provides a pile steel casing reinforcement device for areas with developed beaded karst caves, which solves the problem of poor ground grip tightness between the outer casing and the karst cave geology in the related art.

[0007] The technical solution of the utility model is as follows: a pile steel casing reinforcement device for areas with developed beaded caves, comprising an outer casing, the surface of which is fixedly connected with reinforcement blocks at equal intervals, the inner wall of which is fixedly connected with reinforcement blocks at equal angles, and one end of the reinforcement block is fixedly connected with an inner casing.

[0008] Preferably, the inclination angle of the reinforcement block to the horizontal direction is sixty degrees, and one end of the reinforcement block and the surface of the outer casing form a welded integrated structure.

[0009] Preferably, through grooves are formed at equal intervals on the surface of the reinforcement block, and the cross-section of the through grooves is in the shape of an isosceles trapezoid.

[0010] Preferably, the bottom ends of the outer casing and the inner casing are fixedly connected with clamping blocks at equal angles, and the top ends of the outer casing and the inner casing are provided with clamping grooves at equal angles.

[0011] Preferably, a locking structure is formed between the clamping block and the inside of the clamping slot, and the clamping block and the clamping slot are arc-shaped in a top view.

[0012] Preferably, grooves are formed at equal intervals at the bottom end of the clamping block, and the top end of the clamping block is integrally formed with the bottom ends of the outer casing and the inner casing.

[0013] Preferably, a lifting block is welded to the top end of the inner wall of the outer casing, one end of the lifting block is welded to the outer surface of the inner casing, and a lifting groove is provided at the bottom end of the lifting block.

[0014] Preferably, the cross-section of the lifting groove is in an inverted U shape, and the lifting block and the lifting groove are symmetrically distributed about the vertical center axis of the outer casing.

[0015] Preferably, the inner wall of the inner casing is provided with reserved grooves at equal angles, and the shape of the reserved grooves in a top view is an isosceles trapezoid.

[0016] Preferably, the shape of the reinforcement block in a top view is a triangle, and two sides of the reinforcement block are respectively welded to the inner wall of the outer casing and the outer surface of the inner casing to form an integrated structure.

[0017] The beneficial effects of the utility model are:

[0018] 1. In the utility model, the clamping blocks can be used to improve the stability of the clamping installation between the bottom ends of the outer casing and the inner casing and the bearing layer of the pile end, and the welded reinforcement blocks can increase the contact grip between the outer surface of the outer casing and the non-soluble soil cave section in the depth direction of the karst area, and the through grooves opened on the reinforcement blocks can further increase the contact area between the sand or soil and the reinforcement blocks, thereby further improving the firmness and stability of the outer casing after installation in the karst area where beaded caves are developed, and the welded triangular reinforcement blocks can be used to improve the structural strength between the outer casing and the inner casing, and improve the overall stiffness of the outer casing and the inner casing after installation, and at the same time, the reserved grooves are used to ensure that the upper and lower casings are tightly combined. The above-mentioned device can further reduce the grouting amount after integration, overcome the difficulty of hole formation, improve the quality of hole formation, and improve its practicality;

[0019] 2. The utility model utilizes lifting blocks and lifting grooves to facilitate the lifting action of the outer casing and the inner casing by the staff, and then facilitates the lifting and installation action of the outer casing and the inner casing. At the same time, the engagement between the clamping block and the clamping groove makes the splicing and assembly between multiple outer casings and inner casings more accurate, and can improve the firmness and stability of the splicing and assembly of multiple outer casings and inner casings, which is convenient for the subsequent pouring construction of the steel cage pile foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Figure 1 This is a schematic diagram of the assembled structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the overall structure of the utility model when viewed from above;

[0024] Figure 4 It is a schematic diagram of the enlarged structure of the overall cross section of the utility model;

[0025] Figure 5 For the utility model Figure 4 Enlarged structural diagram at A in the middle.

[0026] In the figure: 1. outer casing; 2. reinforcement block; 3. clamping block; 4. inner casing; 5. lifting block; 6. reserved groove; 7. clamping groove; 8. reinforcement block; 9. through groove; 10. lifting groove. DETAILED DESCRIPTION

[0027] The following will be combined with 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 of 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.

[0028] The preferred embodiment of the pile steel casing reinforcement device provided by the utility model in the beaded cave development area is as follows Figures 1 to 5 As shown: a pile steel casing reinforcement device for areas with beaded cave development, including an outer casing 1, the surface of the outer casing 1 is fixedly connected with reinforcement blocks 2 at equal intervals, the inner wall of the outer casing 1 is fixedly connected with reinforcement blocks 8 at equal angles, and one end of the reinforcement block 8 is fixedly connected with the inner casing 4. By using the welded reinforcement blocks 2, the contact grip between the outer surface of the outer casing 1 and the non-soluble soil cave section in the depth direction of the karst area can be increased, thereby improving the firmness and stability of the outer casing 1 in the karst area after installation.

[0029] In this embodiment, the inclination angle of the reinforcement block 2 to the horizontal direction is sixty degrees, and one end of the reinforcement block 2 and the surface of the outer casing 1 are welded into an integrated structure. The inclined reinforcement block 2 is used to improve the firmness and stability of the outer casing 1 after installation.

[0030] In this embodiment, through grooves 9 are evenly spaced on the surface of the reinforcement block 2, and the cross-section of the through grooves 9 is an isosceles trapezoid. The isosceles trapezoidal through grooves 9 are used to further increase the contact area between the sand or soil and the reinforcement block 2.

[0031] In this embodiment, the bottom ends of the outer casing 1 and the inner casing 4 are fixedly connected with a clamping block 3 at equal angles, and the top ends of the outer casing 1 and the inner casing 4 are provided with a clamping groove 7 at equal angles. The clamping block 3 and the clamping groove 7 are engaged with each other to improve the firmness and stability of the splicing and assembly between multiple outer casings 1 and inner casings 4.

[0032] In this embodiment, a locking structure is formed between the clamping block 3 and the inside of the clamping slot 7. The shape of the clamping block 3 and the clamping slot 7 in the top view is arc-shaped. The locking of the arc-shaped clamping block 3 and the inside of the clamping slot 7 facilitates the splicing and assembly action between the outer casing 1 and the inner casing 4.

[0033] In this embodiment, grooves are provided at equal intervals at the bottom end of the block 3, and the top end of the block 3 is integrated with the bottom ends of the outer casing 1 and the inner casing 4. The block 3 with grooves is used to increase the contact area between the block 3 and the karst geological grip, thereby improving the grip stability of the outer casing 1 and the inner casing 4 during placement and installation.

[0034] In this embodiment, a lifting block 5 is welded to the top of the inner wall of the outer casing 1, one end of the lifting block 5 is welded to the outer surface of the inner casing 4, and a lifting groove 10 is opened at the bottom end of the lifting block 5. The lifting block 5 and the lifting groove 10 are used to facilitate the staff to lift and install the outer casing 1 and the inner casing 4.

[0035] In this embodiment, the cross-section of the lifting groove 10 is in an inverted U shape, and the lifting block 5 and the lifting groove 10 are symmetrically distributed about the vertical center axis of the outer casing 1. The inverted U-shaped lifting groove 10 is used to improve the stability of the lifting between the lifting hook and the lifting block 5.

[0036] In this embodiment, reserved grooves 6 are opened at equal angles on the inner wall of the inner casing 4, and the shape of the reserved grooves 6 in a top view is an isosceles trapezoid. The use of the isosceles trapezoidal reserved grooves 6 can improve the tightness and firmness of the connection between the steel cage, the inner casing 4 and the concrete, thereby improving the firmness and stability of the steel cage pile foundation after construction and installation.

[0037] In addition, the top view of the reinforcement block 8 is in the shape of a triangle, and the two sides of the reinforcement block 8 are respectively welded to the inner wall of the outer casing 1 and the outer surface of the inner casing 4 to form an integrated structure. By utilizing the welded triangular reinforcement block 8, the structural strength of the connection between the outer casing 1 and the inner casing 4 can be improved, thereby improving the compressive strength and stability of the outer casing 1 and the inner casing 4.

[0038] The working principle and use process of the utility model are as follows: first, the outer casing 1 and the inner casing 4 are stably lifted and placed into the karst geology by using the lifting block 5 and the inverted U-shaped lifting groove 10, and then the above operation is repeated, and the engagement between the clamping block 3 and the clamping groove 7 is used to improve the firmness and stability of the splicing and assembly between the multiple outer casings 1 and the inner casings 4, and then sand, gravel and soil are added to the gap between the karst geology and the outer surface of the outer casing 1, and concrete is injected on the upper part, and at this time, the clamping block 3 is used to improve the bottom ends of the outer casing 1 and the inner casing 4 and the karst geology. The stability of the clamping installation is improved, and the welded reinforcement block 2 is used to increase the contact grip between the outer surface of the outer casing 1 and the non-dissolved soil cave section in the depth direction of the karst area. The through groove 9 provided on the reinforcement block 2 further increases the contact area between the sand or soil and the reinforcement block 2, thereby further improving the firmness and stability of the outer casing 1 and the karst cave geological installation. The welded triangular reinforcement block 8 can be used to improve the structural strength of the connection between the outer casing 1 and the inner casing 4, and improve the compressive firmness between the outer casing 1 and the inner casing 4.

[0039] Then put the steel cage into the inner casing 4, add sand or soil into the gap between the outer casing 1 and the inner casing 4 to fill it, then add concrete on the top to form a reinforcement pile, and at the same time add concrete into the inner casing 4. At this time, the reserved groove 6 can be used to improve the tightness and firmness of the connection between the steel cage, the inner casing 4 and the concrete, thereby improving the firmness and stability of the steel cage pile foundation after construction and installation.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pile steel casing reinforcement device for areas with beaded cave development, comprising an outer casing (1), characterized in that: The surface of the outer casing (1) is fixedly connected with reinforcement blocks (2) at equal intervals, the inner wall of the outer casing (1) is fixedly connected with reinforcement blocks (8) at equal angles, and one end of the reinforcement block (8) is fixedly connected with the inner casing (4).

2. A pile steel casing reinforcement device for areas with beaded karst caves according to claim 1, characterized in that: The inclination angle of the reinforcement block (2) with respect to the horizontal direction is sixty degrees, and one end of the reinforcement block (2) and the surface of the outer casing (1) form a welded integrated structure.

3. The pile steel casing reinforcement device for areas with beaded cave development according to claim 1 is characterized in that: The surface of the reinforcement block (2) is provided with through grooves (9) at equal intervals, and the cross-section of the through grooves (9) is in the shape of an isosceles trapezoid.

4. The pile steel casing reinforcement device for areas with beaded cave development according to claim 1 is characterized in that: The bottom ends of the outer casing (1) and the inner casing (4) are fixedly connected with a clamping block (3) at the same angle, and the top ends of the outer casing (1) and the inner casing (4) are provided with a clamping groove (7) at the same angle.

5. The pile steel casing reinforcement device for areas with beaded cave development according to claim 4 is characterized in that: A locking structure is formed between the clamping block (3) and the inside of the clamping slot (7); the clamping block (3) and the clamping slot (7) are arc-shaped in top view.

6. The pile steel casing reinforcement device for areas with beaded karst caves according to claim 4 is characterized in that: The bottom end of the clamping block (3) is provided with grooves at equal intervals, and the top end of the clamping block (3) is integrally formed with the bottom ends of the outer casing (1) and the inner casing (4).

7. The pile steel casing reinforcement device for areas with beaded cave development according to claim 1 is characterized in that: A lifting block (5) is welded to the top of the inner wall of the outer casing (1), one end of the lifting block (5) is welded to the outer surface of the inner casing (4), and a lifting groove (10) is provided at the bottom end of the lifting block (5).

8. The pile steel casing reinforcement device for areas with beaded karst caves according to claim 7 is characterized in that: The cross-section of the lifting groove (10) is in an inverted U shape, and the lifting block (5) and the lifting groove (10) are symmetrically distributed about the vertical center axis of the outer casing (1).

9. The pile steel casing reinforcement device for areas with beaded cave development according to claim 1 is characterized in that: The inner wall of the inner casing (4) is provided with reserved grooves (6) at equal angles, and the shape of the reserved grooves (6) in a top view is an isosceles trapezoid.

10. The pile steel casing reinforcement device for areas with beaded cave development according to claim 1 is characterized in that: The shape of the reinforcement block (8) in a top view is a triangle, and the two sides of the reinforcement block (8) are respectively welded to the inner wall of the outer casing (1) and the outer surface of the inner casing (4) to form an integrated structure.

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