Device for preventing pile core concrete from falling

Abstract

The utility model provides a device for preventing pile core concrete from falling, which comprises a bottom supporting plate, a protection tube and an air bag, the protection tube and the air bag are respectively positioned on two sides of the bottom supporting plate, an inflation tube of the air bag is arranged in the protection tube in a penetrating manner, 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 utility model relates to the technical field of pile foundation engineering construction, in particular to a device for preventing pile core concrete from falling. 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, rock engineering and other fields. To enhance the bearing capacity of the pile end, the pile core is equipped with a steel cage and poured with high-grade concrete according to the specifications. However, in order to smoothly lower the pile core bottom support plate into 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 may fall to the bottom of the pile, affecting the pouring quality of the pile core concrete and resulting in waste of concrete materials. It can also lead to problems such as time-consuming and low efficiency due to rework and secondary processing. Utility Model Content

[0003] The purpose of the utility model 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 utility model is: a device for preventing pile core concrete from falling, which includes: a bottom support plate, a protective tube and an air bag, the protective tube and the air bag are respectively located on both sides of the bottom support plate, the inflation tube of the air bag is passed through the protective tube, and the cross-sectional size of the air bag after inflation is larger than that of 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 radially along the protection tube.

[0008] Furthermore, the lap rod includes an outer tube and an inner rod, and 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] Further, the sealing plate is provided with an insertion block which is matched with the inner contour shape of the protection pipe and is inserted into the protection pipe.

[0011] Further, the length of the protection pipe is 10-15 cm longer than the length of the concrete pile core.

[0012] The air bag can seal the gap between the bottom support plate and the inner wall of the pile hole, prevent the un-solidified pile core concrete from falling from the gap, and reduce the problems such as the decrease of the compactness of the pile bottom, and improve the construction quality and construction efficiency of the pile foundation; the protection pipe can protect the inflation pipe from being punctured by the concrete, and can also serve as an installation carrier of the lapping rod to improve the erection stability of the bottom support plate and the air bag. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a use state diagram of the embodiment of the utility model;

[0014] Figure 2 is a structure diagram of the embodiment of the utility model;

[0015] In the drawings:

[0016] 1, bottom support plate; 11, mounting hole; 2, protection pipe; 3, air bag; 4, inflation pipe; 5, inflation type air cock; 6, lapping rod; 61, outer pipe; 62, inner rod; 7, flange plate; 8, sealing plate; 9, insertion block; 10, reinforcement cage. DETAILED DESCRIPTION

[0017] The technical scheme of the embodiment of the utility model will be described in detail below with reference to the drawings.

[0018] In the description of the embodiment of the utility model, it should be understood that the orientation or position relationship indicated by the terms "top", "bottom" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0019] Reference is made to the accompanying drawings Figure 1-2The present embodiment provides a device for preventing pile core concrete from falling, which includes: a bottom supporting plate 1, a protective tube 2 and an airbag 3. The airbag 3 is located at the bottom of the bottom supporting plate 1, and an inflation tube 4 is provided on the top of the airbag 3. The cross-sectional size of the airbag 3 after inflation is larger than the bottom supporting plate 1; the protective tube 2 is located at the top of the bottom supporting plate 1, and is preferably coaxially distributed with the bottom supporting plate 1. A mounting hole 11 corresponding to the position of the protective tube 2 is provided on the bottom supporting plate 1, and the diameter of the mounting hole 11 is greater than or equal to the inner diameter of the protective tube 2; the inflation tube 4 passes through the mounting hole 11 and the protective tube 2 in sequence and then extends out of the pile hole.

[0020] Before using the above-mentioned device for construction, the steel cage 10 is first manufactured according to the construction requirements. The bottom support plate 1 is welded to the bottom of the steel cage 10, and a mounting hole 11 is opened in the bottom support plate 1. The protective tube 2 is then passed through the middle of the steel cage 10 and fixed to the bottom support plate 1. Finally, the air bag 3 is fixed to the bottom of the bottom support plate 1, and the inflation tube 4 is passed through the mounting hole 11 and the protective tube 2. When using the above-mentioned device for construction, the device is lowered to the designated position in the pile hole. After adjusting the position and verticality of the steel cage 10, the air bag 3 is inflated through the inflation tube 4 using an inflation device with pressure detection outside the pile hole. When the pressure meets the requirements, the inflation is stopped, the inflation tube 4 is closed, and the pile core concrete is poured.

[0021] It is worth noting that the connection strength between the protective 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 protective tube 2 can be made of galvanized steel pipe, and the bottom support plate 1 can be cut from steel plate. The protective tube 2 and the bottom support plate 1 can be connected by welding to ensure the stability of the connection; the airbag 3 should be a 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.

[0022] 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 release 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.

[0023] Furthermore, 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 installation stability, this embodiment further provides a plurality of bridging rods 6 on the outer wall of the protective tube 2. The bridging rods 6 are located at the top of the protective tube 2 and extend radially along the protective tube 2. Placing the bridging rods 6 on the foundation at the top of the pile hole or on the steel cage 10 can effectively improve installation stability.

[0024] To prevent the length of the prefabricated lap rod 6 from being inappropriate, the lap rod 6 can be constructed to include an outer tube 61 and an inner rod 62. 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 inner rod 62 is welded to the outer wall of the protective tube 2. When the length needs to be adjusted, the outer tube 61 or inner rod 62 not directly connected to the protective tube 2 is rotated.

[0025] In addition, this embodiment also provides a flange 7 at the top of the protective tube 2, which is equipped with a removable sealing plate 8. The outer diameter of the protective tube 2 is smaller than the diameter of the sealing plate 8. After the pile core concrete solidifies, the inflation tube 4 can be retracted into the protective tube 2, and the protective tube 2 can be sealed with the sealing plate 8. Then, other concrete structures can be poured on top of the pile core. The other concrete structures are used to provide a secondary seal between the protective tube 2 and the sealing plate 8. This prevents the airbag 3 from decomposing underground for a long time in the later stages of the building's use, causing groundwater to overflow from the protective tube 2 and affect the quality of the pile foundation.

[0026] An insert block 9 may also be provided on the sealing plate 8 . The insert block 9 is adapted to the inner contour of the protection tube 2 and is inserted into the protection tube 2 to improve the sealing effect on the protection tube 2 .

[0027] In order to ensure construction quality and improve construction convenience, the length of the protection tube 2 can be set to be 10 to 15 cm longer than the length of the concrete pile core.

[0028] Compared with the prior art, the beneficial effects of the present invention are: 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 installation stability of the bottom support plate 1 and the airbag 3.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0030] The above is a preferred embodiment 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 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 protective tube and an airbag, wherein the protective tube and the airbag are respectively located on both sides of the bottom support plate, an inflation tube of the airbag is passed through the protective tube, and a cross-sectional dimension 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 the inflation 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 on the top of the protection tube and extend along the radial direction of the protection tube.

5. The device for preventing pile core concrete from falling according to claim 4, characterized in that: The lap rod comprises an outer tube and an inner rod, wherein the inner rod is passed through the outer tube and is threadedly connected to 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, and a detachable sealing plate is provided on the flange. 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 according to claim 6, characterized in that: The blocking 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.

8. The device for preventing pile core concrete from falling according to any one of claims 1-5 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.

Images