A grouting device for indoor grouting body strength test

Abstract

The present invention discloses a grouting device for indoor grouting body strength test, belonging to the technical field of grouting equipment, an inner baffle is fixed on the inner side of an outer tube, the inner baffle is installed at the end of the inner tube away from the device body, a sliding pressure plate is slidably arranged in the outer tube, a grouting ballast chamber is formed between the sliding pressure plate and the inner cavity of the outer tube away from the device body, a first spring is connected between the sliding pressure plate and the inner baffle, and a first exhaust hole is provided on the sliding pressure plate; an outer baffle is fixed on the outer side of the outer tube concentrically with the inner baffle, the outer diameter of the outer baffle is adapted to the diameter of the grouting body, a grouting pipe is installed between the inner tube and the outer tube, and the grouting outlet of the grouting pipe extends into the grouting ballast chamber; after grouting in the grouting ballast chamber, the pressure of the slurry can drive the support tube to move outward. The slurry of the device of the present invention can better fill the grouting ballast chamber under the reaction force of the support tube until the grouting of the entire grouting hole is completed, thereby ensuring the stability of the grouting, and the formed grouting body is more continuous.

Description

Technical Field

[0001] The invention belongs to the technical field of grouting equipment, and in particular relates to a grouting device for indoor grouting body strength testing. Background Art

[0002] In order to better ensure the construction safety of underground tunnel projects and improve the support quality and support strength of anchor bolts, it is necessary to study the factors affecting the anchoring force and the stress transfer law of the anchor bolt bonding interface. Grouting is the main factor affecting the anchor bolt support effect. The quality of grouting directly affects the shear strength of the anchor bolt and is an important indicator to ensure the safety of tunnel construction.

[0003] In order to ensure the safety of tunnel construction, it is usually necessary to carry out shear and pull-out tests on anchor rods indoors. Unlike the on-site anchor rod construction method, the confining pressure of indoor soil is usually lower and the soil density is designed to be looser. In order to prevent damage to the inner wall of the soil during grouting, the indoor grouting equipment usually has a lower pressure and the grouting is not very stable, which will cause problems such as discontinuity of the grouting body. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a grouting device for indoor grouting body strength testing, which can solve the above-mentioned technical problems.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention discloses a grouting device for indoor grouting body strength test. The grouting body is arranged in a grouting hole opened on a soil body, and a rod body is connected to the center of the grouting hole. The grouting device comprises a device body and a support pipe installed on the device body. The support pipe comprises an outer pipe and an inner pipe arranged coaxially, and the outer pipe and the inner pipe are connected by a connecting plate. An inner baffle is fixed on the inner side of the outer pipe, and the inner baffle is installed on the end of the inner pipe away from the device body. A sliding pressure plate is slidably arranged in the outer pipe, and a grouting ballast cavity is formed between the sliding pressure plate and the inner cavity of the outer pipe away from the device body. A first spring is connected between the sliding pressure plate and the inner baffle, and a first exhaust hole is opened on the sliding pressure plate; an outer baffle is fixed on the outer side of the outer pipe concentrically with the inner baffle, and the outer diameter of the outer baffle is adapted to the diameter of the grouting body; a grouting pipe is installed between the inner pipe and the outer pipe, and a grouting outlet of the grouting pipe penetrates into the grouting ballast cavity; after grouting in the grouting ballast cavity, the pressure of the slurry can drive the support pipe to move outward.

[0007] Furthermore, an exhaust pipe is fixed on the inner baffle, and the exhaust pipe extends inward along the axial direction of the support pipe. One end of the exhaust pipe is open and extends out from the other side of the inner baffle, and the other end of the exhaust pipe is closed. A second exhaust hole is opened on the exhaust pipe near the inner baffle, and the exhaust pipe corresponds to the first exhaust hole one by one, and the diameter of the exhaust pipe is adapted to the diameter of the first exhaust hole. When the sliding pressure plate moves to cooperate with the exhaust pipe, the exhaust pipe can close the first exhaust hole.

[0008] Furthermore, the first spring sleeve is arranged on the outer side of the exhaust pipe, and the grouting pipe slides and seals through the through hole opened on the sliding pressure plate.

[0009] Furthermore, the inner end of the outer tube is provided with a plurality of notches for the circulation of slurry.

[0010] Furthermore, a radial support plate is slidably fitted on the support tube, the width direction of the radial support plate extends radially along the support tube, the radial support plate slides through a slide groove provided on the support tube, and the inner edge of the radial support plate is used to limit the rod body.

[0011] Furthermore, a limit plate is fixed on the radial support plate, the limit plate is located between the outer tube and the inner tube, and a second spring is installed between the limit plate and the inner tube.

[0012] Furthermore, an end plate is fixed to the inner edge of the radial support plate, and an end surface of the end plate forms an arc surface adapted to the outer side of the rod body.

[0013] Furthermore, a plurality of guide tubes are arranged between the outer tube and the inner tube. The guide tubes and the grouting tubes are evenly distributed around the circumference of the rod body with the rod body as the center. After the guide tubes are extended into the support tube, they rotate with the inner baffle plate. The outer sides of the guide tubes and the grouting tubes are threadedly connected with a first slider and a second slider. The rotation directions of the internal threads of the first slider and the second slider are opposite. The first slider and the second slider are hinged to the clamping plate through the first connecting rod and the second connecting rod respectively. The clamping plates are arranged in parallel and spaced apart on the outer side of the outer tube. An open groove for giving way to the first connecting rod and the second connecting rod is provided on the outer tube.

[0014] The beneficial effects of the present invention are:

[0015] The present invention discloses a grouting device for indoor grouting body strength test. During specific use, a support pipe is sleeved on the outside of a rod body and then extended into the bottom of a grouting hole. Grouting is injected into a grouting ballast cavity through the grouting pipe. In the process of continuous growth of slurry in the grouting ballast cavity, the slurry can force the air in the grouting hole to be discharged outwardly through a first exhaust hole. After the slurry is full, the slurry acts on an outer baffle plate, and the pressure of the slurry can drive the support pipe to move outward. Under the reaction force of the support pipe, the slurry can better fill the grouting ballast cavity until the grouting of the entire grouting hole is completed, thereby ensuring the stability of the grouting and forming a more continuous grouting body.

[0016] In the device disclosed in the present invention, grouting starts from the bottom, and the movement of the support pipe is achieved by the pressure of the slurry. Therefore, the inner baffle can limit the slurry and prevent the slurry from overflowing under the action of gravity. Therefore, the device of the present invention can adapt to grouting of grouting holes at different angles.

[0017] In the device of the present invention, after the gas is discharged, the slurry drives the sliding pressure plate to move. The combination of the sliding pressure plate and the inner baffle plate can close the first exhaust hole to prevent the slurry from overflowing, so that the slurry can be continuously poured in the grouting ballast chamber. The first spring provides an elastic pre-support force for the sliding pressure plate, which is used to drive the sliding pressure plate to return to its original position, avoid the sliding pressure plate from sticking to the inner baffle plate, and facilitate the smooth progress of the next grouting process.

[0018] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0020] Figure 1 It is a structural schematic diagram of the grouting device of the present invention;

[0021] Figure 2 Schematic diagram of the support tube structure Figure 1 ;

[0022] Figure 3 Schematic diagram of the support tube structure Figure 2 ;

[0023] Figure 4 It is the main view of the support tube;

[0024] Figure 5 is a schematic diagram of the structure of the inner baffle;

[0025] Figure 6 is a schematic diagram of the structure of the guide tube;

[0026] Figure 7 is a schematic diagram of the structure of the radial support plate;

[0027] Figure 8 It is a schematic diagram of the structure of the support pipe in the grouting hole;

[0028] Fig. 9 for Figure 8 Enlarged view of point A in the middle.

[0029] The markings in the accompanying drawings are as follows: soil 1, grouting hole 2, rod body 3, device body 4, support pipe 5, outer pipe 6, inner pipe 7, connecting plate 8, inner baffle plate 9, sliding pressure plate 10, grouting ballast chamber 11, first spring 12, first exhaust hole 13, outer baffle plate 14, grouting pipe 15, exhaust pipe 16, second exhaust hole 17, through hole 18, notch 19, radial support plate 20, slide groove 21, limit plate 22, second spring 23, end plate 24, guide pipe 25, first slider 26, second slider 27, first connecting rod 28, second connecting rod 29, clamping plate 30, opening groove 31. DETAILED DESCRIPTION

[0030] like Figures 1 to 9 As shown, the present invention discloses a grouting device for indoor grouting body strength test, the grouting body is arranged in a grouting hole 2 opened on a soil body 1, and a rod body 3 is connected to the center of the grouting hole 2, that is, the grouting process is realized in the grouting hole 2 in the soil body 1, and becomes a grouting body after solidification. After the grouting is completed, the rod body 3 is fixed at the center of the grouting body, and the rod body 3 and the soil body 1 are connected through the grouting body, which is convenient for the subsequent shear strength test of the grouting body to judge the failure mode.

[0031] Specifically, the grouting device disclosed in the present invention includes a device body 4 and a support pipe 5 installed on the device body 4. The device body 4 adopts an existing structure and has multiple degrees of freedom at multiple angles by using a manipulator, which can drive the support pipe 5 to adjust the angle to adapt to the grouting of grouting holes 2 at different angles. The support pipe 5 can move along the axial direction on the device body 4 to adapt to the pressure of the slurry. The bottom of the device body 4 is equipped with a roller, which can also adapt to the displacement of the axis of the support pipe 5.

[0032] The support tube 5 includes an outer tube 6 and an inner tube 7 which are coaxially arranged. The outer tube 6 is longer than the inner tube 7. The diameter of the outer tube 6 is smaller than the diameter of the grouting hole 2. The diameter of the inner tube 7 is larger than the diameter of the rod body 3. Thus, the support tube 5 can be placed in the space between the rod body 3 and the inner wall of the grouting hole 2. The rod body 3 can just penetrate into the inner tube 7 to avoid interference. In normal use, the grouting hole 2, the support tube 5 and the rod body 3 are coaxially arranged.

[0033] Of course, the outer tube 6 and the inner tube 7 are connected by a connecting plate 8, and the connecting plate 8 is installed between the outer tube 6 and the inner tube 7. An inner baffle plate 9 is fixed on the inner side of the outer tube 6, and the inner baffle plate 9 is installed at the end of the inner tube 7 away from the device body 4. A sliding pressure plate 10 is slidingly arranged in the outer tube 6, and a grouting ballast chamber 11 is formed between the sliding pressure plate 10 and the inner cavity of the outer tube 6 away from the device body 4. A first spring 12 is connected between the sliding pressure plate 10 and the inner baffle plate 9, and a first exhaust hole 13 is opened on the sliding pressure plate 10; an outer baffle plate 14 is fixed on the outer side of the outer tube 6 concentrically with the inner baffle plate 9, and the outer diameter of the outer baffle plate 14 is adapted to the diameter of the grouting body, and a grouting pipe 15 is installed between the inner tube 7 and the outer tube 6, and the slurry outlet of the grouting pipe 15 extends into the grouting ballast chamber 11; after grouting in the grouting ballast chamber 11, the pressure of the slurry can drive the support tube 5 to move outward. The inner side mentioned here is the side close to the bottom of the grouting hole 2, and the outer side is the side away from the bottom of the grouting hole 2.

[0034] The grouting ballast chamber 11 is located on the side where the bottom of the grouting hole 2 is located, and the outer diameter of the outer baffle plate 14 is adapted to the inner diameter of the grouting hole 2. When the overall device is in use, grouting is injected into the grouting ballast chamber 11 through the grouting pipe 15. In the process of increasing the amount of slurry in the grouting ballast chamber 11, the slurry can force the air in the grouting hole 2 to be discharged outward through the first exhaust hole 13. After the slurry is full, the slurry overflows from the grouting ballast chamber 11 and acts on the outer baffle plate 14. The pressure of the slurry can drive the support pipe 5 to move outward. Under the reaction force of the support pipe 5, the slurry can better fill the grouting ballast chamber 11 until the entire grouting hole 2 is grouted. Continuous exhaust and grouting can ensure the stability of grouting. By providing stable pressure to the slurry at all times, the formed grouting body is also more continuous.

[0035] In this embodiment, an exhaust pipe 16 is fixed on the inner baffle 9, and the exhaust pipe 16 corresponds to the first exhaust hole 13, and can be used to exhaust the air in the grouting ballast chamber 11. Among them, the exhaust pipe 16 extends inward along the axial direction of the support tube 5, and the extension length is less than the distance between the inner baffle 9 and the sliding pressure plate 10, and the specific length is shown in the figure. One end of the exhaust pipe 16 is open and extends from the other side of the inner baffle 9, and the other end of the exhaust pipe 16 is closed. A second exhaust hole 17 is opened on the exhaust pipe 16 near the inner baffle 9. The exhaust pipe 16 corresponds to the first exhaust hole 13 one by one, and the diameter of the exhaust pipe 16 is adapted to the diameter of the first exhaust hole 13. When the sliding pressure plate 10 moves to cooperate with the exhaust pipe 16, the exhaust pipe 16 can close the first exhaust hole 13. When the air is exhausted, the end of the exhaust pipe 16 can close the first exhaust hole 13 to prevent the slurry from overflowing and affecting the continuity of grouting.

[0036] In this embodiment, the first spring 12 is sleeved on the outside of the exhaust pipe 16, and the grouting pipe 15 slides and seals through the through hole 18 provided on the sliding plate 10. The grouting pipe 15 can guide the sliding plate 10 to prevent the sliding plate 10 from rotating, and can increase the stability of the sliding plate 10 when moving.

[0037] In this embodiment, a plurality of notches 19 for slurry flow are provided at the inner end of the outer tube 6 , so as to facilitate the slurry to overflow into the space between the outer tube 6 and the grouting hole 2 .

[0038] In this embodiment, a radial support plate 20 is slidably fitted on the support tube 5, and the width direction of the radial support plate 20 extends radially along the support tube 5. The radial support plate 20 slides through the slide groove 21 provided on the support tube 5, and the outer edge of the radial support plate 20 is limited by the inner wall of the grouting hole 2, and the inner edge of the radial support plate 20 is used to limit the rod body 3. By providing the radial support plate 20, after the entire device is placed in the grouting hole 2, the inner wall of the grouting hole 2 can act on the radial support plate 20, so that the radial support plate 20 moves radially inward, and the inner edge of the radial support plate 20 limits the rod body 3. Under the limiting action of multiple circumferentially arranged radial support plates 20, the rod body 3 can be located at the center of the grouting hole 2, which increases the accuracy of the subsequent grouting body strength test.

[0039] In this embodiment, a limiting plate 22 is fixed on the radial support plate 20, and the limiting plate 22 is located between the outer tube 6 and the inner tube 7. A second spring 23 is installed between the limiting plate 22 and the inner tube 7. An end plate 24 is fixed to the inner edge of the radial support plate 20, and the end face of the end plate 24 forms an arc surface adapted to the outer side of the rod body 3. The second spring 23 provides an elastic pre-tension for the limiting plate 22, so that the end plate 24 can be close to the outer side of the rod body 3, which is convenient for adjusting the center position of the rod body 3. Since the rod body 3 needs to be fixed in the center of the grouting hole 2 before grouting, the traditional method uses an additional fixing structure, which can affect the test results. In the device of the present invention, the radial support plate 20 installed on the support tube 5 can locate the center position of the rod body 3, avoiding the restriction of the rod body 3 by the traditional fixing device, and increasing the accuracy of the test results.

[0040] In this embodiment, a plurality of guide tubes 25 are arranged between the outer tube 6 and the inner tube 7. The guide tubes 25 and the grouting tubes 15 are evenly distributed around the rod body 3 with the rod body 3 as the center. After the guide tubes 25 are inserted into the support tube 5, they are rotated with the inner baffle plate 9. The outer sides of the guide tubes 25 and the grouting tubes 15 are both threadedly connected with a first slider 26 and a second slider 27. The rotation directions of the internal threads of the first slider 26 and the second slider 27 are opposite. The first slider 26 and the second slider 27 are respectively hinged to the clamping plate 30 through the first connecting rod 28 and the second connecting rod 29. The clamping plate 30 is arranged parallel and spaced apart on the outer side of the outer tube 6. The outer tube 6 is provided with an open groove 31 for giving way to the first connecting rod 28 and the second connecting rod 29. When the guide tubes 25 are rotated, the first slider 26 and the second slider 27 can be driven to move relative to or opposite to each other, so that the clamping plate 30 can be pressed against the inner wall of the grouting hole 2. After the pressing plate 30 abuts, the support tube 5 can be driven to move in the reverse direction. By adopting the above method, the radial position of the support tube 5 can be conveniently adjusted.

[0041] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A grouting device for indoor grouting body strength test, wherein the grouting body is arranged in a grouting hole opened on the soil body, and a rod body is connected to the center of the grouting hole, characterized in that: The grouting device comprises a device body and a support tube installed on the device body, the support tube comprises an outer tube and an inner tube arranged coaxially, the outer tube and the inner tube are connected by a connecting plate, an inner baffle is fixed on the inner side of the outer tube, the inner baffle is installed on the end of the inner tube away from the device body, a sliding pressure plate is slidably arranged in the outer tube, a grouting ballast cavity is formed between the sliding pressure plate and the inner cavity of the outer tube away from the device body, a first spring is connected between the sliding pressure plate and the inner baffle, and a first exhaust hole is opened on the sliding pressure plate; an outer baffle is fixed on the outer side of the outer tube concentrically with the inner baffle, and the outer diameter of the outer baffle is adapted to the diameter of the grouting body A grouting pipe is installed between the inner tube and the outer tube, and the grouting outlet of the grouting pipe penetrates into the grouting ballast cavity; after grouting in the grouting ballast cavity, the pressure of the slurry can drive the support tube to move outward; an exhaust pipe is fixed on the inner baffle plate, and the exhaust pipe extends inward along the axial direction of the support tube, one end of the exhaust pipe is open and extends out from the other side of the inner baffle plate, and the other end of the exhaust pipe is closed, and a second exhaust hole is opened on the exhaust pipe near the inner baffle plate, the exhaust pipe corresponds to the first exhaust hole one by one, and the diameter of the exhaust pipe is adapted to the diameter of the first exhaust hole, and when the sliding pressure plate moves to cooperate with the exhaust pipe, the exhaust pipe can close the first exhaust hole.

2. A grouting device for indoor grouting body strength testing according to claim 1, characterized in that: The first spring sleeve is arranged on the outer side of the exhaust pipe, and the grouting pipe slides and seals through the through hole opened on the sliding pressure plate.

3. A grouting device for indoor grouting body strength testing according to claim 2, characterized in that: The inner end of the outer tube is provided with a plurality of notches for slurry circulation.

4. A grouting device for indoor grouting body strength testing according to claim 1, characterized in that: The support tube is slidably fitted with a radial support plate, the width direction of the radial support plate extends along the radial direction of the support tube, the radial support plate slides through a slide groove provided on the support tube, and the inner edge of the radial support plate is used to limit the rod body.

5. A grouting device for indoor grouting body strength test according to claim 4, characterized in that: A limiting plate is fixed on the radial support plate, the limiting plate is located between the outer tube and the inner tube, and a second spring is installed between the limiting plate and the inner tube.

6. A grouting device for indoor grouting body strength test according to claim 5, characterized in that: An end plate is fixed to the inner edge of the radial support plate, and an end surface of the end plate forms an arc surface adapted to the outer side of the rod body.

7. A grouting device for indoor grouting body strength testing according to any one of claims 1 to 6, characterized in that: A plurality of guide tubes are arranged between the outer tube and the inner tube. The guide tubes and the grouting tubes are evenly distributed around the circumference of the rod body with the rod body as the center. After the guide tubes penetrate into the support tube, they rotate with the inner baffle plate. The outer sides of the guide tubes and the grouting tubes are threadedly connected with a first slider and a second slider. The rotation directions of the internal threads of the first slider and the second slider are opposite. The first slider and the second slider are hinged to the clamping plate through the first connecting rod and the second connecting rod respectively. The clamping plates are arranged in parallel and spaced apart on the outer side of the outer tube. An open groove for giving way to the first connecting rod and the second connecting rod is opened on the outer tube.

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