Device for preventing pile core concrete from falling

Abstract

The invention provides a device for preventing pile core concrete from falling off and a construction method, the device comprises a bottom supporting plate, a protection pipe and an air bag, the protection pipe and the air bag are located on the two sides of the bottom supporting plate respectively, an inflation pipe of the air bag is arranged in the protection pipe in a penetrating mode, and the section size of the inflated air bag is larger than that of the bottom supporting plate; a plurality of lap joint rods are arranged on the outer wall of the protection pipe, are located at the top of the protection pipe and extend in the radial direction of the protection pipe; a flange plate is arranged at the top of the protection pipe, and a detachable plugging plate is arranged on the flange plate. The air bag can block the gap between the bottom supporting plate and the inner wall of the pile hole, the problem that the compactness of the pile bottom is reduced due to the fact that unsolidified pile core concrete falls down from the gap is solved, and the construction quality and the construction efficiency of a pile foundation are improved; the protection tube can protect the inflation tube and prevent the inflation tube from being punctured and leaked, and can also serve as a carrier of the lap joint rod, so that the erection stability of the bottom supporting plate and the air bag is improved through the lap joint rod.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation engineering construction, in particular to a device for preventing pile core concrete from falling off. Background Art

[0002] High-strength prestressed concrete pipe piles are widely used in various projects due to their high strength, large bearing capacity, good stability and durability. This type of pile plays an important role in construction engineering, bridge construction, foundation treatment, marine engineering and rock engineering. In order to strengthen the bearing capacity of the pile end, the pile core is equipped with a steel cage and high-grade concrete is poured according to the specifications. However, in order to smoothly lower the pile core bottom support plate in the pile hole, the diameter of the pile core bottom support plate is generally smaller than the pile hole diameter. There is a gap between the side of the pile core bottom support plate and the inner wall of the pile hole. During the pouring of the pile core concrete, concrete will fall to the bottom of the pile, affecting the pouring quality of the pile core concrete and causing waste of concrete materials. It will also cause problems such as time-consuming processes and low efficiency due to rework and secondary processing. Summary of the invention

[0003] The object of the present invention is to provide a device for preventing pile core concrete from falling, so as to solve the above-mentioned problems.

[0004] The technical solution adopted by the present invention is: a device for preventing pile core concrete from falling, which includes: a bottom support plate, a protection tube and an airbag, the protection tube and the airbag are respectively located on both sides of the bottom support plate, the inflation tube of the airbag is passed through the protection tube, and the cross-sectional size of the airbag after inflation is larger than the bottom support plate.

[0005] Furthermore, the bottom support plate is provided with a mounting hole corresponding to the position of the protection tube, the diameter of the mounting hole is greater than or equal to the inner diameter of the protection tube, and is used for passing the inflation tube.

[0006] Furthermore, the inflation tube passes through the top of the protection tube and is connected to an inflation type air nozzle.

[0007] Furthermore, a plurality of overlapping rods are provided on the outer wall of the protection tube. The overlapping rods are located at the top of the protection tube and extend in the radial direction of the protection tube.

[0008] Furthermore, the lap rod includes an outer tube and an inner rod, wherein the inner rod is inserted into the outer tube and is threadedly connected to the outer tube.

[0009] Furthermore, a flange is provided on the top of the protection tube, a detachable sealing plate is provided on the flange, and the outer diameter of the protection tube is smaller than the diameter of the sealing plate.

[0010] Furthermore, the sealing plate is provided with an insert block, which is adapted to the inner contour shape of the protection tube and is inserted into the protection tube.

[0011] Furthermore, the length of the protection tube is 10 to 15 cm greater than the length of the concrete pile core.

[0012] The technical solution of the present invention also includes: a method for construction using the device for preventing pile core concrete from falling as described above, comprising the steps of:

[0013] Make the steel cage according to the construction requirements, weld the bottom support plate to the bottom of the steel cage, and open installation holes on the bottom support plate;

[0014] Pass the protective tube through the steel cage and fix it on the bottom support plate;

[0015] Fix the airbag to the bottom of the bottom bracket and pass the inflation tube through the mounting hole and the protective tube;

[0016] Lower the device to the designated position in the pile hole, and use an inflation device with pressure detection outside the pile hole to inflate the airbag through the inflation tube. When the pressure meets the requirement, stop inflating, close the inflation tube, and pour the pile core concrete.

[0017] The beneficial effects of the present invention are as follows: the airbag can block the gap between the bottom support plate and the inner wall of the pile hole, preventing unsolidified pile core concrete from falling from the gap, resulting in reduced density of the pile bottom and other problems, thereby improving the construction quality and efficiency of the pile foundation; the protective tube can protect the inflation tube to prevent it from being punctured by concrete, and can also serve as an installation carrier for the lap rod, so that the lap rod can be used to improve the installation stability of the bottom support plate and the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a usage state diagram of an embodiment of the present invention;

[0019] Figure 2 is a structural diagram of an embodiment of the present invention;

[0020] In the figure:

[0021] 1. Bottom support plate; 11. Mounting hole; 2. Protective tube; 3. Air bag; 4. Inflatable tube; 5. Inflatable air nozzle; 6. Overlap rod; 61. Outer tube; 62. Inner rod; 7. Flange; 8. Sealing plate; 9. Insert; 10. Steel cage. DETAILED DESCRIPTION

[0022] The technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0024] Reference Figure 1-2 The present embodiment provides a device for preventing pile core concrete from falling, which comprises: a bottom support plate 1, a protection tube 2 and an air bag 3, wherein the air bag 3 is located at the bottom of the bottom support plate 1, and an inflation tube 4 is provided on the top of the air bag 3, and the cross-sectional size of the air bag 3 after inflation is larger than that of the bottom support plate 1; the protection tube 2 is located at the top of the bottom support plate 1, and is preferably coaxially distributed with the bottom support plate 1, and a mounting hole 11 corresponding to the position of the protection tube 2 is provided on the bottom support plate 1, and the diameter of the mounting hole 11 is greater than or equal to the inner diameter of the protection tube 2; the inflation tube 4 sequentially penetrates the mounting hole 11 and the protection tube 2 and then extends out of the pile hole.

[0025] Before using the above device for construction, first make the steel cage 10 according to the construction requirements, weld the bottom support plate 1 to the bottom of the steel cage 10, and open the installation hole 11 on the bottom support plate 1; then pass the protection tube 2 through the middle of the steel cage 10 and fix it on the bottom support plate 1; finally, fix the air bag 3 to the bottom of the bottom support plate 1, and pass the inflation tube 4 through the installation hole 11 and the protection tube 2. When using the above device for construction, lower the device to the designated position in the pile hole, adjust the position and verticality of the steel cage 10, and use the inflation device with pressure detection outside the pile hole to inflate the air bag 3 through the inflation tube 4. When the pressure meets the requirements, stop inflating, close the inflation tube 4, and pour the pile core concrete.

[0026] It is worth noting that the connection strength between the protection tube 2 and the bottom support plate 1, the airbag 3 and the bottom support plate 1 should be guaranteed to meet the construction requirements; the protection tube 2 can be made of galvanized steel tube, the bottom support plate 1 can be made of steel plate, and the protection tube 2 and the bottom support plate 1 can be connected by welding to ensure the connection stability; the airbag 3 should be made of rubber airbag 3 of good quality, and be firmly connected to the bottom support plate 1 with strong glue or other strong connection methods to ensure the coaxiality of the airbag 3 and the bottom support plate 1 before and after inflation, so that the airbag 3 can evenly block the circumferential gap of the bottom support plate 1 to prevent the pile core concrete from falling.

[0027] In order to ensure smooth construction, the sealing of the airbag 3 should be ensured. On the one hand, the sealing quality of the airbag 3 itself should meet the standards. On the other hand, the gas in the airbag 3 can also leak out from the inflation tube 4. Therefore, in order to avoid the latter situation, this embodiment provides an inflation type air nozzle 5 at the top of the inflation tube 4. The inflation type air nozzle 5 has good sealing performance and can only inflate but not exhaust gas. It can ensure that the gas in the airbag 3 does not leak out before the pile core concrete solidifies, thereby ensuring its sealing effect on the gap between the bottom support plate 1 and the inner wall of the pile hole.

[0028] In addition, although the bottom support plate 1 is welded to the steel cage 10, the bottom support plate 1 and the inflated airbag 3 are both relatively heavy. To ensure the stability of the installation, the present embodiment further provides a plurality of lap rods 6 on the outer wall of the protection tube 2. The lap rods 6 are located at the top of the protection tube 2 and extend radially along the protection tube 2. The lap rods 6 are installed on the foundation at the top of the pile hole or on the steel cage 10, which can effectively improve the installation stability.

[0029] In order to prevent the lap rod 6 from being inappropriately long, the lap rod 6 can be configured to include an outer tube 61 and an inner rod 62, wherein the inner rod 62 is inserted into the outer tube 61 and threadedly connected to the outer tube 61. One end of the outer tube 61 or the inner rod 62 is welded to the outer wall of the protection tube 2. When the length needs to be adjusted, the outer tube 61 or the inner rod 62 that is not directly connected to the protection tube 2 can be rotated.

[0030] In addition, the present embodiment further provides a flange 7 on the top of the protection tube 2, and a detachable plugging plate 8 is provided on the flange 7, and the outer diameter of the protection tube 2 is smaller than the diameter of the plugging plate 8. After the pile core concrete solidifies, the inflation tube 4 can be retracted into the protection tube 2, and the protection tube 2 can be plugged by the plugging plate 8, and then other concrete structures can be cast on the top of the pile core, and the protection tube 2 and the plugging plate 8 can be plugged for the second time by the other concrete structures, so as to prevent the problem that the airbag 3 is decomposed underground for a long time in the later stage of the building's use, causing groundwater to overflow from the protection tube 2 and affect the quality of the pile foundation.

[0031] An insert block 9 may also be provided on the blocking plate 8 . The insert block 9 is adapted to the inner contour shape of the protection tube 2 and is inserted into the protection tube 2 to improve the blocking effect on the protection tube 2 .

[0032] In order to ensure the construction quality and improve the construction convenience, the length of the protection tube 2 can be set to be 10 to 15 cm greater than the length of the concrete pile core.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows: the airbag 3 can block the gap between the bottom support plate 1 and the inner wall of the pile hole, preventing the unsolidified pile core concrete from falling from the gap, resulting in problems such as reduced density of the pile bottom, thereby improving the construction quality and efficiency of the pile foundation; the protective tube 2 can protect the inflation tube 4 to prevent it from being punctured by concrete, and can also serve as an installation carrier for the lap rod 6, so as to utilize the lap rod 6 to improve the erection stability of the bottom support plate 1 and the airbag 3.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0035] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for preventing pile core concrete from falling, characterized in that: include: A bottom support plate, a protection tube and an airbag, wherein the protection tube and the airbag are respectively located on two sides of the bottom support plate, an inflation tube of the airbag is passed through the protection tube, and the cross-sectional size of the airbag after inflation is larger than that of the bottom support plate.

2. The device for preventing pile core concrete from falling according to claim 1, characterized in that: The bottom support plate is provided with a mounting hole corresponding to the position of the protection tube, the diameter of the mounting hole is greater than or equal to the inner diameter of the protection tube, and is used for passing the inflation tube.

3. The device for preventing pile core concrete from falling according to claim 1, characterized in that: The inflation tube passes through the top of the protection tube and is connected to an inflation type air nozzle.

4. The device for preventing pile core concrete from falling according to claim 1, characterized in that: The outer wall of the protection tube is provided with a plurality of overlapping rods, and the overlapping rods are located at the top of the protection tube and extend in the radial direction of the protection tube.

5. The device for preventing pile core concrete from falling off according to claim 4, characterized in that: The lap rod comprises an outer tube and an inner rod, wherein the inner rod is inserted into the outer tube and is threadedly connected with the outer tube.

6. The device for preventing pile core concrete from falling according to any one of claims 1 to 5, characterized in that: A flange is provided on the top of the protection tube, a detachable sealing plate is provided on the flange, and the outer diameter of the protection tube is smaller than the diameter of the sealing plate.

7. The device for preventing pile core concrete from falling off according to claim 6, characterized in that: The sealing plate is provided with an insert block, which is adapted to the inner contour shape of the protection tube and is inserted in the protection tube.

8. The device for preventing pile core concrete from falling according to any one of claims 1 to 5 and 7, characterized in that: The length of the protection tube is 10 to 15 cm greater than the length of the concrete pile core.

9. A construction method using the device for preventing pile core concrete from falling according to any one of claims 1 to 8, characterized in that: Includes steps: Make the steel cage according to the construction requirements, weld the bottom support plate to the bottom of the steel cage, and open installation holes on the bottom support plate; Pass the protective tube through the steel cage and fix it on the bottom support plate; Fix the airbag to the bottom of the bottom bracket and pass the inflation tube through the mounting hole and the protective tube; Lower the device to the designated position in the pile hole, and use an inflation device with pressure detection outside the pile hole to inflate the airbag through the inflation tube. When the pressure meets the requirement, stop inflating, close the inflation tube, and pour the pile core concrete.

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