Sand layer grouting device and grouting method

Abstract

The utility model relates to a sand layer grouting device and relates to the field of sand layer grouting, including grouting frame body, the grouting frame body includes grouting bottom plate, fixed width board, fixed side board, movable width board and extrusion grouting column, the fixed width board has sleeve removal column, the movable width board has sleeve column hole through both sides of the movable width board, the extrusion grouting column is connected with the fixed width board and has grout inlet hole through the wall surface of the extrusion grouting column, and the extrusion grouting column also has liquid injection hole, the grouting device can improve the uniformity of slurry distribution when sand layer grouting, expand the coverage area of grouting slurry and improve the stability of overall sand layer grouting, the grouting method using the grouting device includes the following steps: step one, inserting the grouting frame body into the sand layer; step two, injecting slurry between the fixed width board and the movable width board; step three, moving the movable width board to the fixed width board to make the extrusion grouting column expose and spray slurry; step four, continuously injecting slurry, waiting for the slurry to solidify and completing sand layer grouting.

Description

Technical Field

[0001] This invention relates to the field of sand grouting, and specifically to a sand grouting device and its grouting method. Background Technology

[0002] Sand grouting refers to a reinforcement measure for sand layers in construction engineering. It involves injecting cement mortar or other types of mortar into the sand layer to increase its strength and stability. This technique is commonly used in foundation or pit reinforcement, wall reinforcement, bridge renovation, and other projects. Sand grouting can also effectively prevent structural settlement under sustained loads. In practical construction, such as during tunnel excavation, the high water content of the surrounding sand layer can easily lead to collapse or quicksand. Traditionally, freezing methods are used, but these are very costly. Chinese patent application CN202211126258.7 discloses a sand grouting device and its grouting method. The solution uses an example of a sand grouting method with 10 boreholes as an example, and describes the process as follows: "...high-pressure water is repeatedly injected in the forward and reverse directions in steps S2 and S3 until the permeability coefficient between odd and even holes increases by more than 30%; then the operation of step S4 is performed..." However, this technical solution uses independent sand grouting devices to cooperate in grouting, but the efficiency of this single-hole grouting device is still relatively low. Summary of the Invention

[0003] This invention provides a sand grouting device and grouting method, which improves the uniformity of grout distribution during sand grouting, expands the coverage area of ​​the grout, and enhances the overall efficiency and stabilization effect of sand grouting.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a sand grouting device, comprising a grouting frame, the grouting frame comprising a grouting base plate, a fixed width plate, fixed side plates, a movable width plate, and an extrusion grouting column, the fixed width plate and the fixed side plates extending vertically upward from the side edge of the grouting base plate, the two side edges of the fixed width plate respectively connecting to the two side plates, the fixed width plate having a sleeve-moving column, the sleeve-moving column being a straight rod extending outward perpendicular to the inner side surface of the fixed width plate, the movable width plate having sleeve-moving holes penetrating both sides of the movable width plate, the extrusion grouting column being a hollow cylindrical rod extending horizontally outward from the inner surface of the fixed width plate, the connection between the extrusion grouting column and the fixed width plate having a grout inlet hole penetrating the wall of the extrusion grouting column, and the extrusion grouting column also having a spray hole, the spray hole being a through hole penetrating the wall of the extrusion grouting column.

[0005] Preferably, the diameter of the spray hole increases from small to large in the direction away from the slurry inlet hole.

[0006] Preferably, the sleeve-shifting post also has a rotating sleeve, which is looped around the sleeve-shifting post, and both the surface of the sleeve-shifting post and the inner surface of the rotating sleeve are threaded.

[0007] Preferably, the moving width plate also has a first groove, which is a groove that extends downward from the upper surface of the moving width plate. The rotating sleeve has an extension cylinder and a mounting wheel. The extension cylinder is a sleeve that extends from the inner surface of the rotating sleeve toward the sleeve post hole into the first groove. The mounting wheel is a circular panel that connects to the end of the extension cylinder.

[0008] Preferably, the moving width plate also includes a second groove, a top probe rod, and a supporting rod. The second groove is a through groove extending downward from the middle of the first groove to the bottom surface of the moving width plate. The top probe rod is embedded in the second groove. The supporting rod is a straight rod extending horizontally outward from both sides of the upper end of the top probe rod. The supporting rod is connected to the bottom surface of the first groove by a spring. The roller has wheel protrusions, which are smooth protrusions protruding outward from the surface of the roller. The grouting base plate... There is also an outer probe, which includes a central groove, a groove block, a side connecting plate, and a side groove. The central groove is a vertical through groove that penetrates the grouting base plate. The groove block is inserted into the central groove. The side groove is a horizontal groove that is recessed from the two sides of the central groove. The side connecting plate is a flat plate that extends horizontally outward from the two sides of the groove block. The lower surface of the side connecting plate is connected to the bottom surface of the side groove by a spring. The lower surface of the groove block has a convex strip that gradually narrows from top to bottom.

[0009] Preferably, the grouting frame also has a downward protruding surface, which is a protruding curved plate that bends downward from both sides of the grouting base plate towards the edge and extends towards each other to meet. The downward protruding surface is located on both sides of the central groove.

[0010] Preferably, there is also a blocking plate between the lower probing surfaces, the blocking plate connecting the edges of the lower probing surfaces on both sides, the blocking plate making the space between the lower probing surfaces on both sides a closed space.

[0011] Preferably, the grouting base plate also has a through hole, which is a circular hole that penetrates the grouting base plate. The lower probe surface has a drip hole, which is a through hole that penetrates the lower probe surface. The diameter of the drip hole gradually decreases from the outside to the inside.

[0012] The grouting method using the above-mentioned sand grouting device includes the following steps:

[0013] Step 1: Insert the grouting frame into the sand layer;

[0014] Step 2: Inject grout between the fixed and moving grout plates until the grout fills the grouting column.

[0015] Step 3: Move the moving wide plate towards the fixed wide plate so that the extrusion grouting column is exposed and grout is sprayed out to the outer sand layer through the injection hole;

[0016] Step 4: As the grout in the grouting frame decreases, continue to inject grout into it until the liquid level stops dropping. Once the grout has solidified, the sand layer grouting is complete.

[0017] Preferably, in step three, the movement of the moving plate can be adjusted as needed to expose the required length of the grouting column and the injection hole to achieve grouting.

[0018] In summary, the present invention has the following beneficial effects.

[0019] By spraying grout into dispersed extrusion grouting columns, the uniformity of grout distribution during sand grouting is improved, the coverage area of ​​the grout is expanded, and the overall efficiency and stabilization effect of sand grouting are enhanced.

[0020] The structure of the rotating sleeve connecting the roller can not only reduce the wear of the sleeve hole on the threaded surface of the sleeve moving column, but also link the wide plate by rotating the rotating sleeve.

[0021] The rotation of the wheel and wheel protrusion is similar to that of a cam. During the rotation, the wheel protrusion will periodically squeeze the top probe rod. As the wheel protrusion presses down, the lower end of the top probe rod will push the groove block, causing the groove block to slide down. On one hand, it compacts the sand layer downwards, and on the other hand, it provides space for the grout to flow into the sand layer below, so that the grout around the grouting frame has greater strength after solidification.

[0022] Before grouting, the grooving block can be rotated to excavate the sand layer below, making it easier for the grouting frame to be inserted into the sand layer.

[0023] When grouting is injected into the grouting frame, the grout can enter the lower probe surface through the through hole and flow outward, thereby grouting the sand layer below the grouting base plate; at the same time, the diameter of the drip hole makes it difficult for sand particles to enter the lower probe surface. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the grouting frame.

[0026] Figure 2 This is a schematic diagram of the moving wide plate moving inward.

[0027] Figure 3 This is a schematic diagram of a structure for mounting a movable column on a fixed-width plate.

[0028] Figure 4 This is an enlarged schematic diagram of the shifting column.

[0029] Figure 5 This is a schematic diagram of the rotating structure.

[0030] Figure 6 This is a schematic diagram of the top probe structure.

[0031] Figure 7 This is a schematic diagram showing the wheel protrusion without squeezing the top probe rod.

[0032] Figure 8 This is a schematic diagram showing the wheel protrusion pressing against the probe rod.

[0033] Figure 9 This is an enlarged schematic diagram of the structure at the outer exploration section.

[0034] Figure 10 This is a schematic diagram of the drip hole structure.

[0035] Figure 11 This is a schematic diagram of abortion using the grouting method.

[0036] In the diagram: 1. Fixed width plate, 2. Moving width plate, 3. Extrusion grouting column, 4. Sleeve moving column, 5. Grouting hole, 6. Spraying hole, 7. Rotating sleeve, 8. Adhesive wheel, 9. Top probe rod, 10. Support rod, 11. Wheel protrusion, 12. Embedded groove block, 13. Block side connecting plate, 14. Side embedded groove, 15. Lower probe surface. Implementation

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Example

[0038] like Figures 1 to 10As shown, a sand grouting device includes a grouting frame, which comprises a grouting base plate, a fixed width plate 1, fixed side plates, a movable width plate 2, and an extrusion grouting column 3. The fixed width plate 1 and the fixed side plates extend vertically upward from the side of the grouting base plate. The two side edges of the fixed width plate 1 are respectively connected to the two side plates. The fixed width plate 1 has a sleeve-moving column 4, which is a straight rod extending outward perpendicular to the inner side of the fixed width plate 1. The movable width plate 2 has sleeve holes penetrating both sides of the movable width plate 2. The extrusion grouting column 3 is a hollow cylindrical rod extending horizontally outward from the inner surface of the fixed width plate 1. At the connection between the extrusion grouting column 3 and the fixed width plate 1, there are grout inlet holes 5 penetrating the wall of the extrusion grouting column 3, which are spaced apart to facilitate grout entry. There are also spray holes 6 on the extrusion grouting column 3, which are perforations penetrating the wall of the extrusion grouting column 3. The initial state of the grouting frame is that the moving width plate 2 is attached to the end of the extrusion grouting column 3, and the end of the extrusion grouting column 3 is located in the sleeve hole. In use, the grouting frame is inserted into the sand layer. After reaching the required depth, grout is injected into the grouting frame so that the grout completely submerges the extrusion grouting column 3. The injected grout can enter the extrusion grouting column 3 through the grout inlet hole 5. When the grout stabilizes, the moving width plate 2 is moved so that it moves closer to the fixed width plate 1 on the sleeve moving column 4. At this time, the extrusion grouting column 3 protrudes from the sleeve hole, and the spray hole 6 also sprays grout out of the outside of the extrusion grouting column 3 and flows into the sand layer. As the grout flows into the sand layer through the spray hole 6, the grout level drops. Grout can continue to be injected into the grouting frame until the grout stabilizes. At this time, it means that the sand layer outside the moving width plate 2 is saturated with the grout and the grout has solidified and stabilized. Finally, grouting continues until the upper sleeve hole is submerged and the grout solidifies. The uppermost sleeve-moving column 4 is fitted into the sleeve-column hole, and the lower sleeve-column hole is fitted into the extrusion grouting column 3. The design of the sleeve-moving column 4 can not only realize the movement of the moving width plate 2, but also provide a location for operating the grouting frame. The injection holes 6 are distributed at intervals on the extrusion grouting column 3. The number of exposed injection holes 6 can be changed by changing the moving distance of the moving width plate 2 according to the actual required injection rate and other requirements, thereby achieving the effect of changing the injection rate.

[0039] The diameter of the injection hole 6 gradually increases in the direction away from the slurry inlet hole 5. The diameter of the injection hole 6 gradually increases from the inside to the outside, which ensures that the outer injection hole 6 can also receive sufficient slurry distribution, while the inner slurry hole has a smaller diameter, which will make it easier for the slurry to flow to the outer injection hole 6 with a larger diameter.

[0040] The sleeve 4 also has a rotating sleeve 7, which is looped around the sleeve 4. Both the surface of the sleeve 4 and the inner surface of the rotating sleeve 7 are threaded. The moving wide plate 2 can be moved by rotating the rotating sleeve 7 on the sleeve 4, thus ensuring that the movement of the moving wide plate 2 is stable and controllable.

[0041] The moving width plate 2 also has a first groove, which is a groove extending downward from the upper surface of the moving width plate 2. The depth of the first groove is greater than that of the sleeve hole. The rotating sleeve 7 has an extension cylinder and a mounting wheel 8. The extension cylinder is a sleeve that extends from the inner surface of the rotating sleeve 7 towards the sleeve hole into the first groove. The mounting wheel 8 is a circular panel connected to the end of the extension cylinder. By inserting the mounting wheel 8 into the first groove and connecting it to the rotating sleeve 7 via the extension cylinder, the moving width plate 2 can be driven by the movement of the rotating sleeve 7 in both the inward and outward directions. In addition, the extension cylinder can also support the moving width plate 2 to prevent wear on the threads of the sleeve hole.

[0042] The movable wide plate 2 also has a second groove, a top probe rod 9, and a supporting rod 10. The second groove is a through groove that extends downward from the middle of the first groove to the bottom surface of the movable wide plate 2. The top probe rod 9 is inserted into the second groove. The supporting rod 10 is a straight rod that extends horizontally outward from both sides of the upper end of the top probe rod 9. The supporting rod 10 is connected to the bottom surface of the first groove by a spring. The roller 8 has a wheel protrusion 11, which is a smooth protrusion that protrudes outward from the surface of the roller 8. The grouting base plate also has an outer probe. The outer probe includes a central groove, a groove block 12, a side connecting plate 13, and a side groove 14. The central groove is a vertical through groove that penetrates the grouting base plate. The groove block 12 is inserted into the central groove. The side groove 14 is a horizontal groove that is recessed from the two sides of the central groove. The side connecting plate 13 is a flat plate that extends horizontally outward from the two sides of the groove block 12. The lower surface of the side connecting plate 13 is connected to the bottom surface of the side groove 14 by a spring. The lower surface of the groove block 12 has a convex strip that gradually narrows from top to bottom. During the rotation of the rotating sleeve 7, the contact wheel 8 and the wheel protrusion 11 also rotate. The rotation of the contact wheel 8 and the wheel protrusion 11 is similar to the rotation of a cam. During the rotation, the wheel protrusion 11 will periodically squeeze the top probe rod 9. The top probe rod 9, supported by the support rod 10, will move up and down in the second groove. As the wheel protrusion 11 presses down, the lower end of the top probe rod 9 will push the groove block 12, causing the groove block 12 to descend. The descending groove block 12 acts on the sand layer below the grouting base plate with its protruding ridges, compacting the sand layer downwards while providing space for the grout to flow into the sand layer below. This makes the grout around the grouting frame stronger after solidification. In particular, before grouting, the rotating sleeve 7 can be rotated to make the groove block 12 excavate the sand layer below, making it easier for the grouting frame to be inserted into the sand layer.

[0043] The grouting frame also has downward protruding surfaces 15, which are protruding curved plates that curve downwards from both sides of the grouting base plate towards the edge and extend towards each other to meet. The downward protruding surfaces 15 are located on both sides of the central groove. The downward protruding surfaces 15 can enhance the sand-breaking ability of the grouting base plate and can provide structural assistance for the insertion of the grouting frame into the sand layer in the early stage, so as to facilitate the downward insertion of the grouting frame into the sand layer.

[0044] There is also a blocking plate between the lower probe surfaces 15. The blocking plate connects the edges of the lower probe surfaces 15 on both sides, making the space between the lower probe surfaces 15 on both sides a closed space. The blocking plate can enhance the strength of the lower probe surfaces 15.

[0045] The grouting base plate also has a through hole, which is a circular hole penetrating the grouting base plate. The lower probe surface 15 has drip holes, which are perforations penetrating the lower probe surface 15, with the diameter of the drip holes gradually decreasing from the outside to the inside. When grout is injected into the grouting frame, the grout can flow through the through hole into the gap between the lower probe surface 15 and the plugging plate, and then flow downwards into the sand layer through the drip holes, increasing the grouting strength.

[0046] like Figure 11 The grouting method using the above-mentioned sand grouting device includes the following steps:

[0047] Step 1: Insert the grouting frame into the sand layer;

[0048] Step 2: Inject grout between the fixed and moving grout plates until the grout fills the grouting column.

[0049] Step 3: Move the moving wide plate towards the fixed wide plate so that the extrusion grouting column is exposed and grout is sprayed out to the outer sand layer through the injection hole;

[0050] Step 4: As the grout in the grouting frame decreases, continue to inject grout into it until the liquid level stops dropping. Once the grout has solidified, the sand layer grouting is complete.

[0051] In step three, the movement of the moving plate can be adjusted as needed to expose the required length of the grouting column and the injection hole to achieve grouting.

[0052] In the description of this invention, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0053] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0054] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sand grouting device, characterized in that, The grouting frame includes a grouting base plate, a fixed width plate (1), fixed side plates, a movable width plate (2), and an extrusion grouting column (3). The fixed width plate (1) and the fixed side plates extend vertically upward from the side of the grouting base plate. The two sides of the fixed width plate (1) are respectively connected to the two sides of the fixed side plates. The fixed width plate (1) has a sleeve-moving column (4), which is a straight rod extending outward perpendicular to the inner side of the fixed width plate (1). The movable width plate (2) has sleeve holes penetrating both sides of the movable width plate (2). The extrusion grouting column (3) is a hollow cylindrical rod extending horizontally outward from the inner surface of the fixed width plate (1). The connection between the extrusion grouting column (3) and the fixed width plate (1) has a grout inlet hole (5) penetrating the wall of the extrusion grouting column (3). The grouting column (3) also has a spray hole (6), which is a through hole that penetrates the wall of the grouting column (3). The diameter of the spray hole (6) increases from small to large in the direction away from the grout inlet hole (5). The sleeve column (4) also has a rotating sleeve (7), which is wrapped around the sleeve column (4). The surface of the sleeve column (4) and the inner surface of the rotating sleeve (7) are both threaded. The moving wide plate (2) also has a first groove, which is a groove that extends downward from the upper surface of the moving wide plate (2). The rotating sleeve (7) has an extension cylinder and a mounting wheel (8). The extension cylinder is a sleeve that extends from the inner surface of the rotating sleeve (7) toward the sleeve hole into the first groove. The mounting wheel (8) is a circular panel that connects to the end of the extension cylinder.

2. The sand grouting device according to claim 1, characterized in that, The moving width plate (2) also has a second groove, a top probe rod (9), and a support rod (10). The second groove is a through groove that extends downward from the middle of the first groove to the bottom surface of the moving width plate (2). The top probe rod (9) is inserted into the second groove. The support rod (10) is a straight rod that extends horizontally outward from both sides of the upper end of the top probe rod (9). The support rod (10) is connected to the bottom surface of the first groove by a spring. The roller (8) has a wheel protrusion (11), which is a smooth protrusion that protrudes outward from the surface of the roller (8). The grouting base plate also has The outer probe includes a central groove, a groove block (12), a block side connecting plate (13), and a side groove (14). The central groove is a vertical through groove that penetrates the grouting base plate. The groove block (12) is inserted into the central groove. The side groove (14) is a horizontal groove that is recessed from the two sides of the central groove. The block side connecting plate (13) is a flat plate that extends horizontally outward from the two sides of the groove block (12). The lower surface of the block side connecting plate (13) is connected to the bottom surface of the side groove (14) by a spring. The lower surface of the groove block (12) has a convex strip that gradually narrows from top to bottom.

3. The sand grouting device according to claim 2, characterized in that, The grouting frame also has a downward probing surface (15), which is a protruding curved plate that bends downward from both sides of the grouting base plate towards the edge and extends towards each other to meet. The downward probing surface (15) is located on both sides of the central groove.

4. A sand grouting device according to claim 3, characterized in that, There is also a blocking plate between the lower probing surfaces (15), the blocking plate connects the edges of the lower probing surfaces (15) on both sides, and the blocking plate makes the space between the lower probing surfaces (15) on both sides a closed space.

5. A sand grouting device according to claim 4, characterized in that, The grouting base plate also has a through hole, which is a round hole that penetrates the grouting base plate. The lower probe surface (15) has a drip hole, which is a through hole that penetrates the lower probe surface (15). The diameter of the drip hole gradually decreases from the outside to the inside.

6. The grouting method of the sand layer grouting device according to claims 1-5, characterized in that, Includes the following steps: Step 1: Insert the grouting frame into the sand layer; Step 2: Inject grout between the fixed and moving grout plates until the grout fills the grouting column. Step 3: Move the moving wide plate towards the fixed wide plate so that the extrusion grouting column is exposed and grout is sprayed out to the outer sand layer through the injection hole; Step 4: As the grout in the grouting frame decreases, continue to inject grout into it until the liquid level stops dropping. Once the grout has solidified, the sand layer grouting is complete.

7. The grouting method according to claim 6, characterized in that, In step three, the movement of the moving plate can be adjusted as needed to expose the required length of the grouting column and the injection hole to achieve grouting.

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