Anti-seepage grouting filling device for dam foundation

Abstract

The dam foundation anti-seepage grouting filling device comprises a connecting pipe body and a grouting pipe, the grouting pipe is arranged in the axial middle of the connecting pipe body, the grouting pipe and the connecting pipe body are fixed at the top of the connecting pipe body, a piston seat is arranged between the lower portion of the grouting pipe and the inner wall of the connecting pipe body, and the lower end of the piston seat is flush with the bottom face of the connecting pipe body in a normal state. Slurry flowing holes are formed in the lower portion of the connecting pipe body in the circumferential direction in an array mode, part of slurry which is not fully filled flows backwards into the connecting pipe body through the slurry flowing holes in the outer side, part of the filled slurry continues to compact the grouting holes downwards, and part of the filled slurry exerts thrust on the piston base upwards to enable the piston base to move upwards. Due to the arrangement of the piston seats, the grouting speed is adjusted by means of thrust and indirect influence of reaction of the piston seats relative to slurry, a plurality of piston seats are arranged in the axial direction, and the required thrust is larger when the piston seats are more tightly sealed upwards, so that larger acting force is given to the slurry in the continuous grouting process, cracks can be more uniformly filled, and the grouting efficiency is improved. And therefore, the filling is more full and compact.

Description

Technical Field

[0001] This utility model relates to the field of grouting construction technology, specifically a dam foundation anti-seepage grouting filling device. Background Technology

[0002] The soil in dam foundations often has many cracks, causing soil loosening. Under the influence of gravity or rainwater erosion, the soil and rock forming the slope are prone to localized cracking and collapse. Injecting cement grout into the rock mass is an effective way to prevent soil cracking. Existing cement grouting devices deliver grout at a uniform rate through pipelines to fill and fix the cracks. However, the grouting speed of current cement grouting devices is difficult to control, often resulting in uneven grouting into the cracks, incomplete and loose filling, and high grouting resistance, leading to poor soil and rock fixation.

[0003] This case arose in order to resolve the aforementioned issues. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a dam foundation anti-seepage grouting filling device, which solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a dam foundation anti-seepage grouting filling device, comprising a connecting pipe and a grouting pipe, wherein the grouting pipe is placed in the axial middle of the connecting pipe and the two are fixed at the top, a piston seat is provided between the lower part of the grouting pipe and the inner wall of the connecting pipe, and under normal conditions the lower end of the piston seat is flush with the bottom surface of the connecting pipe, and the lower part of the connecting pipe has grout flow holes arranged in a circumferential array, and the grout that is not fully filled will be backflowed into the connecting pipe through the grout flow holes on the outside, part of the grout continues to compact the grouting holes downwards, and part of it pushes the piston seat upwards to move it upwards.

[0008] Preferably, the upper side of the grouting pipe extends above the connecting pipe body to facilitate connection to external pipelines for grouting, and the lower end of the grouting pipe extends below the connecting pipe body to facilitate grout discharge.

[0009] Preferably, multiple piston seats are axially inserted and are configured to fit more tightly against the inner wall of the connecting pipe and the outer wall of the grouting pipe.

[0010] Preferably, a push block is provided at the uppermost piston seat, and a valve ball seat is provided at the upper inner side of the grouting pipe. The outer side of the valve ball seat is pivotally connected to the inner wall of the grouting pipe via a rotating rod, and extends to the outer side to connect to a rotating handle, wherein the positions of the push block and the ends of the rotating handle correspond vertically.

[0011] Preferably, a grout-stopping plate is installed on the outer wall of the upper end of the connecting pipe, and the diameter of the grout-stopping plate is adapted to the diameter of the drilled grouting hole.

[0012] (III) Beneficial Effects

[0013] After adopting the above technical solution, this utility model has the following advantages compared with the prior art: The dam foundation anti-seepage grouting filling device of this utility model has a piston seat. By using the thrust of its relative reaction force with the grout, it indirectly affects and adjusts the grouting speed. Moreover, multiple piston seats are placed axially, and the thrust required is greater as the seal is tighter at the top. Thus, a greater force is given to the grout during the continuous grouting process, which can more evenly fill the cracks, and thus the grouting is more full and tight. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention;

[0015] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0016] Figure 3 This is a cross-sectional view of the disassembled version of this utility model.

[0017] In the diagram: 1. Connecting pipe; 2. Grouting pipe; 3. Piston seat; 4. Grouting hole; 5. Valve ball seat; 6. Rotating handle; 7. Push block; 8. Grout stop plate. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1-2 As shown: A dam foundation anti-seepage grouting filling device includes a connecting pipe body 1 and a grouting pipe 2, wherein the grouting pipe 2 is placed in the axial middle part of the connecting pipe body 1 and the two are fixed at the top. A piston seat 3 is provided between the lower part of the grouting pipe 2 and the inner wall of the connecting pipe body 1, which can adjust the grouting speed so that the grout is evenly injected into the cracks to achieve full filling.

[0020] The upper side of the grouting pipe 2 extends above the connecting pipe body 1 to facilitate connection to external pipelines for grouting, and the lower end of the grouting pipe 2 extends below the connecting pipe body 1 to facilitate grout discharge.

[0021] Under normal conditions, the lower end of the piston seat 3 is flush with the bottom surface of the connecting pipe body 1. During the gradual grouting process, the piston seat 3 will move upward under force until it abuts against the inner wall of the upper side of the connecting pipe body 1. There are grout flow holes 4 arranged circumferentially at the lower part of the connecting pipe body 1. Some of the insufficiently filled grout will flow back into the connecting pipe body 1 through the grout flow holes 4 on the outside. Some of it will continue to compact the grouting holes downward, and some will push the piston seat 3 upward to move it upward.

[0022] Secondly, the grouting speed is also affected by the reaction thrust of the piston seat 3, thus adjusting the grouting speed. Furthermore, multiple piston seats 3 can be inserted axially, and the thrust required for a tighter seal is set as they go higher, thereby giving the grout a greater force during the continuous grouting process, which can more evenly fill the cracks.

[0023] like Figure 3 Therefore, a push block 7 is provided at the uppermost piston seat 3, and a valve ball seat 5 is provided on the upper inner side of the grouting pipe 2. The outer side of the valve ball seat 5 is pivotally connected to the inner wall of the grouting pipe 2 via a rotating rod, and extends to the outer side to connect a rotating handle 6. The positions of the push block 7 and the ends of the rotating handle correspond vertically. As the piston seat 3 moves upward, the push block 7 pushes the rotating handle upward to rotate the valve ball seat 5, thereby gradually reducing the through area of ​​the valve ball seat 5. When the grouting is about to be completed, the grouting speed is passively slowed down (the position of the push block 7 makes it impossible to achieve a 180° rotation of the rotating handle to close the grouting).

[0024] A grout stopper 8 is installed on the outer wall of the upper end of the connecting pipe 1. The diameter of the grout stopper 8 is matched with the diameter of the drilled grouting hole, which prevents the cement grout from flowing back.

[0025] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. A dam foundation seepage prevention grouting filling device, comprising a connecting pipe and a grouting pipe, wherein the grouting pipe is placed inside the axial middle of the connecting pipe and the two are fixed at the top, characterized in that: The lower part of the grouting pipe is provided with a piston seat between the inner wall of the connecting pipe body, and the lower end of the piston seat is flush with the bottom surface of the connecting pipe body in normal state. The lower part of the connecting pipe body is provided with a plurality of grouting holes in the circumferential direction. The local slurry which is not filled sufficiently can flow into the connecting pipe body through the grouting holes on the outside, and the grouting slurry continues to be compacted downwardly and partially upwardly to give a pushing force to the piston seat to move upwardly.

2. The dam foundation anti-seepage grouting filling device according to claim 1, characterized in that: The upper side of the grouting pipe is higher than the connecting pipe body to facilitate the connection of the external pipeline for grouting. The lower end of the grouting pipe extends below the connecting pipe body to facilitate the discharge of the slurry.

3. The dam foundation anti-seepage grouting filling device according to claim 1, characterized in that: A plurality of piston seats are arranged axially, and the closer to the inner wall of the connecting pipe body and the outer wall of the grouting pipe, the more compact the piston seat is.

4. The dam foundation anti-seepage grouting filling device according to claim 3, characterized in that: A pushing block is arranged at the uppermost piston seat, and a valve ball seat is arranged on the inner side of the upper part of the grouting pipe. The outer side of the valve ball seat is pivotally connected to the inner wall of the grouting pipe through a rotating rod and is extended to the outside to be connected with a rotating handle. The position of the pushing block corresponds to the end of the rotating handle.

5. The dam foundation anti-seepage grouting filling device according to claim 1, characterized in that: A stop piece is arranged on the outer wall of the upper end of the connecting pipe body, and the diameter of the stop piece is matched with the hole diameter of the drilled grouting hole.

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