A clog-resistant post-grouting device capable of removing sediment

Abstract

This utility model discloses an anti-clogging post-grouting device for removing sediment, comprising a grouting pipe pre-embedded in the cast-in-place pile, a drain pipe disposed within the gap of the grouting pipe, the upper ends of the grouting pipe and the drain pipe being connected to a grouting device and a suction device, respectively, an annular sealing plate being disposed between the inner wall of the lower end of the grouting pipe and the outer wall of the lower end of the drain pipe, the annular sealing plate having several guide holes arranged circumferentially, and a one-way sealing structure for easy opening of the grouting pipe being provided at the lower end of the drain pipe and in the guide holes; this scheme injects high-pressure flushing fluid into the grouting pipe through the grouting device, the flushing fluid forming a vortex through the several guide holes to flush the sediment at the bottom of the pile, while the suction device can extract the flushing fluid containing sediment through the drain pipe, thereby achieving the cleaning of the sediment layer at the bottom of the pile; and under the combined action of pressure supply, suction, and vortex, the cleaning effect and efficiency of sediment can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of post-grouting technology, specifically to an anti-clogging post-grouting device that can remove sediment. Background Technology

[0002] Post-grouting refers to a reinforcement technique in which cement grout or chemical grout is injected under high pressure into the soil layer at the pile tip, pile side or around the structure through grouting pipes that are pre-embedded or drilled after the completion of the cast-in-place pile construction. This is done to improve the mechanical properties of the soil, enhance the bond strength between the structure and the soil, thereby increasing the bearing capacity, reducing settlement or repairing defects.

[0003] Before grouting after the pile is cast-in-place, due to reasons such as incomplete hole cleaning, poor mud properties, or improper concrete pouring process, residual drill cuttings, mud sediments, or loose deposits at the pile bottom, i.e., pile bottom sediment layer, will have a significant negative impact on the bearing capacity, deformation characteristics, and durability of the pile foundation. Therefore, it is necessary to remove the pile bottom sediment layer. At the same time, the pile bottom sediment layer can easily cause blockage of the grouting pipe, making it difficult to open the grouting pipe and ultimately preventing grouting from being carried out. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this utility model provides an anti-clogging post-grouting device that can remove sediment, solving the problems of difficulty in removing sediment from the bottom of cast-in-place piles and difficulty in opening grouting pipes.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A clog-resistant post-grouting device for removing sediment is provided, comprising a grouting pipe pre-embedded in a cast-in-place pile, a drain pipe disposed in the gap of the grouting pipe, the upper ends of the grouting pipe and the drain pipe being connected to a grouting device and a suction device, respectively, an annular sealing plate being disposed between the inner wall of the lower end of the grouting pipe and the outer wall of the lower end of the drain pipe, a plurality of guide holes being disposed in the circumferential direction of the annular sealing plate, and a one-way sealing structure for facilitating the opening of the grouting pipe being disposed at the lower end of the drain pipe and in the guide holes.

[0006] Furthermore, the one-way sealing structure includes several valves arranged circumferentially on the inner wall of the sewage pipe or the guide hole. The valves are fan-shaped and the valves are spliced ​​together to form a conical sealing body for sealing the sewage pipe or the guide hole. The conical sealing body opens and closes automatically by the pressure difference generated on both sides.

[0007] Furthermore, the tip of the conical sealed body located inside the sewage pipe points to the upper port of the sewage pipe, and an annular groove is provided on the circumferential direction of the outer wall of the conical sealed body. A retaining ring is fitted on the annular groove, and the retaining ring is connected to one end of the pull rope. The other end of the pull rope passes through the upper port of the sewage pipe.

[0008] Furthermore, the tip of the conical seal located inside the flow guide hole points towards the lower port of the flow guide hole.

[0009] Furthermore, the valve is made of an elastic material.

[0010] Furthermore, a number of guide holes are evenly arranged in the circumferential direction of the annular sealing plate, and the guide holes are all inclined along the tangent direction of their respective circumferences.

[0011] The beneficial effects of this utility model are as follows: 1. In this scheme, during the construction of cast-in-place piles, several guide holes can be sealed using the unidirectional permeability of conical sealing bodies to prevent mud or sediment from entering the grouting pipe and causing blockage. The conical sealing body located in the sewage pipe is fixed by a retaining ring, ensuring that the conical sealing body remains sealed even when squeezed by mud or sediment. When it is necessary to remove the sediment layer at the bottom of the pile, pulling the rope can disengage the retaining ring from the conical sealing body, thereby enabling unidirectional sewage discharge from the sewage pipe. The pressure of the high-pressure flushing fluid can automatically open the conical sealing body in the guide hole, thus enabling convenient opening and closing of the entire post-grouting device for subsequent sediment removal.

[0012] 2. This solution uses grouting equipment to inject high-pressure flushing fluid into the grouting pipe. The flushing fluid forms a vortex through several guide holes to flush the sediment at the bottom of the pile. At the same time, the suction equipment can extract the flushing fluid containing sediment through the sewage pipe, thereby cleaning the sediment layer at the bottom of the pile. Furthermore, the combined effect of pressure supply, suction, and vortex can effectively improve the cleaning effect and efficiency of sediment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the anti-clogging post-grouting device in this scheme.

[0014] Figure 2 This is a schematic diagram of the arrangement of the guide holes on the annular sealing plate.

[0015] Figure 3 This is a schematic diagram of the conical sealed body located inside the flow guide hole.

[0016] Figure 4 for Figure 3 A bottom view.

[0017] Figure 5 This is a schematic diagram of a conical sealed structure located inside a sewage pipe.

[0018] Among them, 1. cast-in-place pile, 2. grouting pipe, 3. sewage pipe, 4. grouting equipment, 5. suction equipment, 6. annular sealing plate, 7. guide hole, 8. valve, 9. retaining ring, 10. pull rope, 11. tee joint. Detailed Implementation

[0019] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0020] like Figure 1 and Figure 2 As shown, this scheme for removing sediment using an anti-clogging post-grouting device includes a grouting pipe 2 pre-embedded in the cast-in-place pile 1. A drain pipe 3 is installed in the gap inside the grouting pipe 2. The upper ends of the grouting pipe 2 and the drain pipe 3 are connected to the grouting equipment 4 and the suction equipment 5, respectively. An annular sealing plate 6 is installed between the inner wall of the lower end of the grouting pipe 2 and the outer wall of the lower end of the drain pipe 3. Several guide holes 7 are arranged circumferentially on the annular sealing plate 6. The guide holes 7 are evenly distributed circumferentially on the annular sealing plate 6, and all guide holes 7 are inclined along the tangent direction of their respective circumferences. In this scheme, high-pressure flushing fluid is injected into the grouting pipe 2 by the grouting equipment 4. The flushing fluid forms a vortex through the several guide holes 7 to flush the sediment at the bottom of the pile. At the same time, the suction equipment 5 can extract the flushing fluid containing sediment through the drain pipe 3, thereby achieving the cleaning of the sediment layer at the bottom of the pile. Under the combined action of pressure supply, suction, and vortex, the cleaning effect and efficiency of sediment can be effectively improved.

[0021] like Figures 3 to 5 As shown, a one-way sealing structure is provided at the lower end of the sewage pipe 3 and inside the guide hole 7 to facilitate the opening of the grouting pipe 2. The one-way sealing structure includes four valves 8 arranged circumferentially on the inner side wall of the sewage pipe 3 or the guide hole 7. The valves 8 are fan-shaped and made of elastic material. The four valves 8 are spliced ​​together to form a conical sealing body for sealing the sewage pipe 3 or the guide hole 7. The conical sealing body opens and closes automatically by the pressure difference generated on both sides.

[0022] The tip of the conical sealed body located inside the guide hole 7 points to the lower port of the guide hole 7; the tip of the conical sealed body located inside the drain pipe 3 points to the upper port of the drain pipe 3, and an annular groove is provided on the circumferential direction of the outer wall of the conical sealed body. A retaining ring 9 is fitted on the annular groove. The retaining ring 9 is connected to one end of the pull rope 10, and the other end of the pull rope 10 passes through the upper port of the drain pipe 3. In specific implementation, the upper end of the drain pipe 3 and the suction device 5 can be connected through two mutually perpendicular interfaces in the three-way connector 11, and the pull rope 10 can pass through the other interface of the three-way connector 11.

[0023] In this scheme, during the pouring of the cast-in-place pile 1, the pointed tip of the conical sealed body located in the guide hole 7 points to the lower port of the guide hole 7, allowing the guide hole 7 to be sealed by the unidirectional permeability of the conical sealed body. This prevents mud or sediment from entering the grouting pipe 2 during the construction of the cast-in-place pile 1 and causing blockage. The conical sealed body located in the drain pipe 3 is fixed by the retaining ring 9, ensuring that the conical sealed body remains sealed even when squeezed by mud or sediment. When it is necessary to remove the sediment layer at the bottom of the pile, the retaining ring 9 can be disengaged from the conical sealed body by pulling the rope 10, and the retaining ring 9 can be pulled out from the tee joint 11. Then, the interface of the tee joint 11 is closed, allowing the drain pipe 3 to discharge sewage in one direction. The pressure of the high-pressure flushing fluid can cause the conical sealed body in the guide hole 7 to open automatically, thus realizing the convenient opening and closing of the entire post-grouting device for subsequent sediment cleaning.

Claims

1. A clog-resistant post-grouting device capable of removing sediment, characterized in that, The system includes a grouting pipe pre-embedded in the cast-in-place pile, a drain pipe installed in the gap of the grouting pipe, the upper ends of the grouting pipe and the drain pipe connected to grouting equipment and suction equipment respectively, an annular sealing plate installed between the inner wall of the lower end of the grouting pipe and the outer wall of the lower end of the drain pipe, a plurality of guide holes provided in the circumferential direction of the annular sealing plate, and a one-way sealing structure for easy opening of the grouting pipe installed at the lower end of the drain pipe and in the guide holes.

2. The anti-clogging post-grouting device for removing sediment according to claim 1, characterized in that, The one-way sealing structure includes several valves arranged circumferentially on the inner sidewall of the sewage pipe or the guide hole. The valves are fan-shaped and are spliced ​​together to form a conical sealing body for sealing the sewage pipe or the guide hole. The conical sealing body opens and closes automatically by the pressure difference generated on both sides.

3. The anti-clogging post-grouting device for removing sediment according to claim 2, characterized in that, The tip of the conical sealed body located inside the sewage pipe points to the upper port of the sewage pipe, and an annular groove is provided on the circumferential direction of the outer wall of the conical sealed body. A retaining ring is fitted on the annular groove. The retaining ring is connected to one end of the pull rope, and the other end of the pull rope passes through the upper port of the sewage pipe.

4. The anti-clogging post-grouting device for removing sediment according to claim 2, characterized in that, The tip of the conical seal located inside the flow guide hole points towards the lower port of the flow guide hole.

5. The anti-clogging post-grouting device for removing sediment according to claim 2, characterized in that, The valve is made of an elastic material.

6. The anti-clogging post-grouting device for removing sediment according to claim 1, characterized in that, The aforementioned guide holes are evenly arranged in the circumferential direction of the annular sealing plate, and each guide hole is inclined along the tangent direction of its circumference.

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