An underground foundation pre-grouting reinforcement device

Abstract

This utility model discloses an underground foundation pre-grouting reinforcement device, including a base. Symmetrical support frames are fixed on both sides of the upper end of the base, and an adjusting frame is movably arranged between the two support frames. A grouting pipe is fixedly installed on the adjusting frame. A pipe insertion port for through-connection to the inside of the grouting pipe is provided on the front side of the adjusting frame. A through hole is opened in the middle of the base, through which the grouting pipe movably passes. A grouting head is detachably connected to the bottom end of the grouting pipe. This utility model uses a nut to threadedly connect to the threaded groove on the outer surface of a limiting rod, thereby restricting the movement of the limiting rod. This allows the other end of the limiting rod to disengage from the limiting insertion of the upper limit groove of the grouting head and move into the interior of the drive cavity. Then, the connecting pipe at the top of the grouting head can be disassembled and replaced from the inside of the connecting groove, avoiding wear and tear on the grouting head after prolonged use and affecting grouting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of grouting reinforcement technology, specifically to an underground foundation advanced grouting reinforcement device. Background Technology

[0002] A soft-over-hard, water-rich stratum refers to a composite geological structure consisting of a soft soil layer at the top and a hard rock layer at the bottom, rich in groundwater. This type of stratum is characterized by a low Standard Penetration Test (SPT) number, high water content, and small particle size in the upper strata, while the lower strata exhibit the opposite characteristics, typically showing variations in lithology, weathering degree, sedimentary rock structure, and texture. Therefore, to ensure construction safety and improve stratum stability in soft-over-hard, water-rich strata, pre-reinforcement through grouting before tunnel excavation can effectively control surface settlement and reduce risks during construction.

[0003] In some grouting reinforcement devices, the grouting pipe and grouting head are fixedly connected. The grouting head is in hard contact with the hard rock strata for a long time, which will cause the grouting head to wear down, thus affecting the grouting efficiency of the grouting reinforcement device. Therefore, it does not meet the existing requirements. In response, we have proposed an underground foundation pre-grouting reinforcement device. Utility Model Content

[0004] The purpose of this utility model is to provide an underground foundation advanced grouting reinforcement device to solve the problem mentioned in the background art that the grouting pipe and grouting head of some grouting reinforcement devices are fixedly connected, and the grouting head is in hard contact with the hard rock layer for a long time, which will cause the grouting head to wear down, thereby affecting the grouting efficiency of the grouting reinforcement device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an underground foundation pre-grouting reinforcement device, comprising a base, symmetrical support frames fixedly provided on both sides of the upper end of the base, an adjusting frame movably provided between the two support frames, a grouting pipe fixedly installed on the adjusting frame, a pipe insertion port for through connection with the inside of the grouting pipe provided on the front side of the adjusting frame, a through hole opened in the middle of the base, and the grouting pipe movably passing through the through hole, and a grouting head detachably connected to the bottom end of the grouting pipe.

[0006] Preferably, a threaded rod is connected to the inside of one side of the support frame via a motor drive, and a sliding rod is fixedly installed inside the other side of the support frame. One end of the adjusting frame is threadedly connected to the outer surface of the threaded rod, and the other end of the adjusting frame is slidably connected to the outer surface of the sliding rod.

[0007] Preferably, the bottom end of the grouting pipe is provided with a docking groove, and symmetrical driving cavities are provided on both sides of the docking groove and inside the grouting pipe. Limiting rods are movably connected inside the driving cavities on both sides, and both ends of the limiting rods extend through to the outside of the driving cavity.

[0008] Preferably, a limiting plate is fixedly connected to the outer surface of one end of the limiting rod inside the driving cavity, and a spring is fixedly connected between one side of the limiting plate and one side of the inner wall of the driving cavity, and the spring is wound around the outer surface of the limiting rod.

[0009] Preferably, the limiting rod has a threaded groove on its outer surface near the middle, and nuts are fitted on both sides of the outer surface of the grouting pipe and on the outer surface of the limiting rod, and the nuts are threadedly connected to the threaded groove.

[0010] Preferably, the upper end of the grouting head is fixedly connected to a connecting pipe that is inserted into the docking groove. Both sides of the outer surface of the connecting pipe are provided with limiting grooves corresponding to the driving cavity. One end of the limiting rod that passes through the outer side of the driving cavity extends into the interior of the docking groove and is inserted into the corresponding limiting groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model uses a starting motor to drive the threaded rod to rotate. As the threaded rod rotates, the thread drives the adjusting frame to move downward along the outer surface of the slide rod, thereby driving the grouting pipe and grouting head to connect with the pile trench to be grouted. Then, the delivery pipe is inserted into the pipe socket, thereby realizing the grouting of the inside of the pile trench.

[0013] 2. This utility model involves pulling one end of the two limiting rods outward, thereby causing the limiting plate to compress the spring and exposing the threaded groove on the outer surface of the limiting rod to the outside of the grouting pipe. Then, the nut is rotated to connect the nut to the threaded groove, thereby restricting the movement of the limiting rod. This causes the other end of the limiting rod to disengage from the limiting groove of the grouting head and move and be stored inside the drive cavity. Then, the connecting pipe at the top of the grouting head can be disassembled and replaced from the inside of the docking groove, avoiding wear and tear on the grouting head after long-term use, which would affect the grouting efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a front sectional view of the entire utility model;

[0016] Figure 3 This utility model Figure 2 A schematic diagram of the structure at point A in the middle.

[0017] In the diagram: 1. Base; 101. Through hole; 2. Support frame; 3. Motor; 4. Threaded rod; 5. Slide rod; 6. Adjusting frame; 7. Grouting pipe; 701. Connecting groove; 702. Drive cavity; 8. Pipe socket; 9. Grouting head; 10. Limiting rod; 1001. Threaded groove; 11. Limiting plate; 12. Spring; 13. Nut; 14. Connecting pipe; 1401. Limiting groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figures 1 to 3 An embodiment of this utility model provides an underground foundation pre-grouting reinforcement device, including a base 1, symmetrical support frames 2 fixed on both sides of the upper end of the base 1, an adjusting frame 6 movably provided between the two support frames 2, a grouting pipe 7 fixedly installed on the adjusting frame 6, a pipe insertion port 8 connected to the inside of the grouting pipe 7 on the front side of the adjusting frame 6, a through hole 101 opened in the middle of the base 1, and the grouting pipe 7 movably passes through the through hole 101, and a grouting head 9 is detachably connected to the bottom end of the grouting pipe 7.

[0020] One side of the support frame 2 is connected to a threaded rod 4 via a motor 3, and the other side of the support frame 2 is fixedly equipped with a sliding rod 5. One end of the adjusting frame 6 is threadedly connected to the outer surface of the threaded rod 4, and the other end of the adjusting frame 6 is slidably connected to the outer surface of the sliding rod 5. By moving the entire structure to the pile trench to be grouted, the motor 3 is started to drive the threaded rod 4 to rotate. While the threaded rod 4 rotates, the threaded rod drives the adjusting frame 6 to move downward along the outer surface of the sliding rod 5, thereby driving the grouting pipe 7 and the grouting head 9 to connect with the pile trench to be grouted. Then the delivery pipe is inserted into the pipe socket 8, thereby realizing the grouting inside the pile trench.

[0021] The bottom end of the grouting pipe 7 is provided with a docking groove 701. Symmetrical driving cavities 702 are provided on both sides of the docking groove 701 and inside the grouting pipe 7. Limiting rods 10 are movably connected inside both driving cavities 702, and both ends of the limiting rods 10 extend through to the outside of the driving cavities 702. A limiting plate 11 is fixedly connected to the outer surface of one end of the limiting rod 10 inside the driving cavity 702. A spring 12 is fixedly connected between one side of the limiting plate 11 and one side of the inner wall of the driving cavity 702, and the spring 12 is wound around the limiting rod 10. On the outer surface, the limiting rod 10 has a threaded groove 1001 near the middle. Nuts 13 are fitted on both sides of the outer surface of the grouting pipe 7 and on the outer surface of the limiting rod 10. The nuts 13 are threadedly connected to the threaded groove 1001. By pulling one end of the limiting rods 10 outward, the limiting plate 11 is driven to compress the spring 12, and the threaded groove 1001 on the outer surface of the limiting rod 10 is exposed to the outside of the grouting pipe 7. Then, the nuts 13 are rotated to make the nuts 13 threadedly connected to the threaded groove 1001, thereby restricting the movement of the limiting rod 10.

[0022] The upper end of the grouting head 9 is fixedly connected to a connecting pipe 14 that is inserted into the docking groove 701. Both sides of the outer surface of the connecting pipe 14 are provided with limiting grooves 1401 corresponding to the driving cavity 702. One end of the limiting rod 10 extends through the outside of the driving cavity 702 and into the interior of the docking groove 701, and is inserted into the corresponding limiting groove 1401. The other end of the limiting rod 10 is disengaged from the limiting insertion of the upper limiting groove 1401 of the grouting head 9 and moved and stored inside the driving cavity 702. Then the connecting pipe 14 at the top of the grouting head 9 can be disassembled and replaced from the interior of the docking groove 701.

[0023] When using the underground foundation pre-grouting reinforcement device, the entire structure is moved to the pile trench to be grouted, and then the motor 3 is started to drive the threaded rod 4 to rotate. As the threaded rod 4 rotates, the thread drives the adjusting frame 6 to move downward along the outer surface of the sliding rod 5, thereby driving the grouting pipe 7 and the grouting head 9 to connect with the pile trench to be grouted. Then, the delivery pipe is inserted into the pipe socket 8, thereby realizing grouting inside the pile trench. After the grouting head 9 has been used for a long time, by pulling one end of the limit rods 10 on both sides outward, the limit plate 11 is driven to compress the spring. 12. Compress the nut 13 so that the threaded groove 1001 on the outer surface of the limiting rod 10 is exposed to the outside of the grouting pipe 7. Then rotate the nut 13 so that the nut 13 is threadedly connected to the threaded groove 1001, thereby restricting the movement of the limiting rod 10. This causes the other end of the limiting rod 10 to disengage from the limiting insertion of the upper limit groove 1401 of the grouting head 9 and move and be stored inside the drive cavity 702. Then the connecting pipe 14 at the top of the grouting head 9 can be disassembled and replaced from the inside of the connecting groove 701 to avoid wear and tear of the grouting head 9 after long-term use, which would affect the grouting efficiency.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pre-grouting reinforcement device for underground foundations, comprising a base (1), characterized in that: Symmetrical support frames (2) are fixedly provided on both sides of the upper end of the base (1). An adjustment frame (6) is movably provided between the two support frames (2). A grouting pipe (7) is fixedly installed on the adjustment frame (6). A pipe insertion port (8) is provided on the front side of the adjustment frame (6) and is connected to the inside of the grouting pipe (7). A through hole (101) is opened in the middle of the base (1), and the grouting pipe (7) moves through the through hole (101). A grouting head (9) is detachably connected to the bottom end of the grouting pipe (7).

2. The underground foundation pre-grouting reinforcement device according to claim 1, characterized in that: One side of the support frame (2) is connected to a threaded rod (4) via a motor (3), and the other side of the support frame (2) is fixedly provided with a sliding rod (5). One end of the adjusting frame (6) is threadedly connected to the outer surface of the threaded rod (4), and the other end of the adjusting frame (6) is slidably connected to the outer surface of the sliding rod (5).

3. The underground foundation pre-grouting reinforcement device according to claim 1, characterized in that: The bottom end of the grouting pipe (7) is provided with a docking groove (701). On the outside of the docking groove (701) and on both sides inside the grouting pipe (7), there are symmetrical driving cavities (702). The interior of the driving cavities (702) on both sides is movably connected with a limiting rod (10), and both ends of the limiting rod (10) extend through to the outside of the driving cavity (702).

4. The underground foundation pre-grouting reinforcement device according to claim 3, characterized in that: The limiting rod (10) is fixedly connected to a limiting plate (11) on the outer surface of one end inside the driving cavity (702). A spring (12) is fixedly connected between one side of the limiting plate (11) and one side of the inner wall of the driving cavity (702), and the spring (12) is wrapped around the outer surface of the limiting rod (10).

5. The underground foundation pre-grouting reinforcement device according to claim 3, characterized in that: The limiting rod (10) has a threaded groove (1001) on its outer surface near the middle. Nuts (13) are fitted on both sides of the outer surface of the grouting pipe (7) and on the outer surface of the limiting rod (10). The nuts (13) are threadedly connected to the threaded groove (1001).

6. The underground foundation pre-grouting reinforcement device according to claim 3, characterized in that: The upper end of the grouting head (9) is fixedly connected to a connecting pipe (14) that is inserted into the docking groove (701). Both sides of the outer surface of the connecting pipe (14) are provided with limiting grooves (1401) corresponding to the driving cavity (702). The end of the limiting rod (10) that passes through the outside of the driving cavity (702) extends into the interior of the docking groove (701) and is inserted into the corresponding limiting groove (1401).

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