Auxiliary positioning device for grouting core pipe

Abstract

The auxiliary positioning device comprises the grouting core pipe and a sleeve valve pipe, a reinforcing steel bar is arranged at the upper end of the grouting core pipe in a penetrating mode, the two ends of the reinforcing steel bar extend out of the grouting core pipe by a certain distance, the upper end and the lower end of the grouting core pipe are each provided with an air inflation bag, and the air inflation bags are connected with the sleeve valve pipe. Two inverted-L-shaped arc steel plates are installed on the inner wall of the sleeve valve pipe, a groove is formed in each inverted-L-shaped arc steel plate, and the two grooves are oppositely formed and used for containing the two ends of the steel bar respectively. The grouting device has the advantages that the two inverted-L-shaped arc steel plates are arranged on the inner wall of the sleeve valve pipe at the position which is a certain distance away from the upper portion of the grout outlet hole, the grouting core pipe can be accurately positioned, the grout outlet hole is located in a closed space formed by the inflation bags at the upper end and the lower end of the grouting core pipe, accurate grouting of a to-be-reinforced area of a stratum is achieved, and the grouting efficiency is improved. And the grouting precision and the grouting efficiency of the sleeve valve pipe are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sleeve valve pipe grouting, in particular to an auxiliary positioning device for a grouting core pipe. Background Art

[0002] With the continuous development of the economy, the scale of infrastructure construction at home and abroad is growing. Various diseases that occur during engineering construction are often treated by grouting reinforcement methods, among which sleeve valve tube grouting reinforcement method is the most widely used in engineering. Compared with the traditional grouting method, sleeve valve tube grouting has the following advantages: (1) it can achieve regional division, variable slurry, multiple and repeated grouting; (2) the possibility of slurry cross-linking and slurry bubbling is small; (3) a larger grouting pressure can be used, the slurry spreads evenly, and the diffusion radius is large; (4) the grouting speed is fast and the efficiency is high.

[0003] However, during the grouting construction process, the grouting core tube is often positioned inaccurately due to uneven construction sites, immediate surface settlement or human factors, resulting in the slurry being unable to be ejected from the slurry outlet holes on the sleeve valve tube, thereby affecting the grouting effect of the sleeve valve tube. Summary of the invention

[0004] The purpose of the utility model is to provide an auxiliary positioning device for a grouting core pipe in accordance with the above-mentioned deficiencies of the prior art. By arranging two inverted L-shaped arc steel plates on the inner wall of the sleeve valve pipe at a certain distance from the upper part of the slurry outlet hole, the grouting core pipe can be accurately positioned so that the slurry outlet hole is located in the enclosed space formed by the inflatable bags at the upper and lower ends of the grouting core pipe, thereby achieving precise grouting of the formation area to be reinforced, and improving the grouting accuracy and grouting efficiency of the sleeve valve pipe.

[0005] The purpose of this utility model is achieved by the following technical solutions:

[0006] An auxiliary positioning device for a grouting core tube, characterized in that it comprises a grouting core tube and a sleeve valve tube, wherein a steel bar is penetrated through the upper end of the grouting core tube, both ends of the steel bar extend a certain distance outside the grouting core tube, an inflatable bag is provided at both ends of the grouting core tube, two inverted L-shaped arc steel plates are installed on the inner wall of the sleeve valve tube, a groove is provided on each of the two inverted L-shaped arc steel plates, and the two grooves are arranged opposite to each other and are respectively used to place the two ends of the steel bar.

[0007] The sleeve valve tube is provided with a plurality of pulp outlet holes, and the sleeve valve tube is sleeved with a rubber sleeve wrapped around the pulp outlet holes.

[0008] The slurry outlet holes are arranged along the circumference of the sleeve valve tube, and the slurry outlet holes are distributed in a plum blossom shape.

[0009] The grouting core tube is provided with a plurality of grout outlets.

[0010] The upper end of the grouting core tube is connected with a pull rod.

[0011] A gap is formed between the two inverted L-shaped arc steel plates to allow the steel bars to pass through.

[0012] The steel bars are located above the two air bags, and the two inverted L-shaped arc steel plates are both located above the slurry outlet holes.

[0013] The distance that the end of the steel bar extends to the outside of the grouting core tube is greater than the distance from the outer wall of the grouting core tube to the inner edge of the inverted L-shaped arc steel plate, and is less than the distance from the outer wall of the grouting core tube to the inner wall of the sleeve valve tube.

[0014] The inverted L-shaped arc steel plate and the sleeve valve pipe, as well as the steel bars and the grouting core pipe are fixed by a bolt structure.

[0015] The utility model has the advantages that by arranging two inverted L-shaped arc steel plates on the inner wall of the sleeve valve tube at a certain distance from the upper part of the slurry outlet hole, the grouting core tube can be accurately positioned so that the slurry outlet hole is located in the enclosed space formed by the inflatable bags at the upper and lower ends of the grouting core tube, thereby achieving precise grouting of the stratum to be reinforced area and improving the grouting accuracy and efficiency of the sleeve valve tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the grouting core tube before positioning in the utility model;

[0017] Figure 2 It is a schematic diagram of the grouting core tube after positioning in the utility model;

[0018] Figure 3 It is a schematic diagram of the connection between the steel bar and the grouting core pipe in the utility model;

[0019] Figure 4 It is a schematic diagram of the connection between the inverted L-shaped arc steel plate and the sleeve valve pipe in the utility model;

[0020] like Figure 1-4 As shown, the marks in the figure are respectively represented as:

[0021] Grouting core tube; 11. pull rod; 12. inflatable bag;

[0022] Steel bar; 21. Nut; 22. Thread;

[0023] Inverted L-shaped arc steel plate; 31, groove; 32, bolt structure; 321, bolt; 322, nut;

[0024] 4. Sleeve valve tube; 41. Slurry outlet hole; 42. Rubber sleeve. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by technicians in the same industry:

[0026] Example: Figure 1-4 As shown, this embodiment relates to an auxiliary positioning device for a grouting core tube, which mainly includes a sleeve valve tube 4 and a grouting core tube 1. The inner wall of the sleeve valve tube 4 is connected to two inverted L-shaped arc steel plates 3 by a bolt structure 32. The two inverted L-shaped arc steel plates 3 are provided with a groove 31 in the middle part of the side perpendicular to the inner wall of the sleeve valve tube 4. An air bag 12 is provided at both ends of the grouting core tube 1. A small hole is respectively opened on the two side walls of the upper end of the grouting core tube 1. The small hole is located at the upper part of the air bag 12 at the upper end. The two small holes penetrate the inner and outer walls of the grouting core tube 1. The steel bar 2 is connected to the grouting core tube 1 through the two small holes, and the two ends of the steel bar 2 extend out of the grouting core tube 1 by a certain distance. Two pull rods 11 are provided on the grouting core tube 1, and the two pull rods 11 are respectively located directly above the two ends of the steel bar 2. During grouting, the grouting core tube 1 is moved to the corresponding grouting area (that is, the steel bar 2 is located near the upper part of the inverted L-shaped arc steel plate 3) by pulling the pull rods 11, and the grouting core tube 1 is rotated to place the exposed part of the steel bar 2 in the groove 31 to fix the grouting core tube 1.

[0027] like Figure 1-2 As shown, the sleeve valve tube 4 is provided with slurry outlet holes 41. In this embodiment, the slurry outlet holes 41 on the sleeve valve tube 4 are provided with at least two rows, which are arranged along the sleeve valve tube 4 in equal arcs and distributed in a plum blossom shape to increase the grouting speed. The sleeve valve tube 4 is provided with a rubber sleeve 42 wrapped around the slurry outlet holes 41, and the rubber sleeve 42 is used to prevent the slurry from flowing back into the sleeve valve tube 4. In addition, the grouting core tube 1 is provided with a plurality of slurry outlets along its circumference.

[0028] like Figure 1 , Figure 2 and Figure 4 As shown, the sleeve valve tube 4 is provided with three circular holes at equal distances on each side of both sides located at an appropriate distance above the slurry outlet hole 41, and the sides of the two inverted L-shaped arc steel plates 3 that are in contact with the inner wall of the sleeve valve tube 4 are respectively provided with three circular holes at equal distances, and the number and diameter of the circular holes on the sleeve valve tube 4 are the same as those on the two inverted L-shaped arc steel plates 3, and they are aligned one by one, and the bolts 321 of the bolt structure 32 connect the two inverted L-shaped arc steel plates 3 with the sleeve valve tube 4 through the aligned circular holes, and are fixed by the nuts 322 of the bolt structure 32. In this embodiment, the outer diameters of the two inverted L-shaped arc steel plates 3 are consistent with the inner diameter of the sleeve valve tube 4, ensuring that the inverted L-shaped arc steel plates 3 and the inner wall of the sleeve valve tube 4 fit tightly. The arc length of the two inverted L-shaped arc steel plates 3 is less than half of the inner circumference of the sleeve valve tube 4, and the two inverted L-shaped arc steel plates 3 do not contact each other. The gap between the two inverted L-shaped arc steel plates 3 should be larger than the diameter of the steel bar 2 so as not to affect the up and down movement of the grouting core tube 1.

[0029] like Figure 1-2 As shown, the size and shape of the groove 31 on the inverted L-shaped arc steel plate 3 are respectively matched with the size and shape of the steel bar 2, and the distance between the two ends of the steel bar 2 and the grouting core tube 1 should be greater than the distance from the outer wall of the grouting core tube 1 to the innermost edge of the inverted L-shaped arc steel plate 3, and less than the distance from the outer wall of the grouting core tube 1 to the inner wall of the sleeve valve tube 4, so that the end of the steel bar 2 can be just stuck in the groove 31 to ensure that the inverted L-shaped arc steel plate 3 and the steel bar 2 are firmly connected. Among them, the side of the two inverted L-shaped arc steel plates 3 that is perpendicular to the inner wall of the sleeve valve tube 4 has an appropriate thickness, which can provide a groove depth that is the same as the diameter of the steel bar 2, ensuring that the grouting core tube 1 is provided with stable support.

[0030] like Figure 1-2 As shown, the inflatable bags 12 at the upper and lower ends of the grouting core tube 1 are relatively small before being inflated, and do not affect the up and down movement of the grouting core tube 1. After being inflated, the volume expands, and the upper and lower inflatable bags 12 form a closed space to prevent the slurry from leaking from the upper and lower ends of the grouting core tube 1. Among them, the positions where the two inverted L-shaped arc steel plates 3 are arranged should be able to ensure that the slurry outlet holes 41 on the sleeve valve tube 4 are located in the closed space formed by the inflatable bags 12 at the upper and lower ends of the grouting core tube 1 after the grouting core tube 1 is fixed.

[0031] like Figure 1-3 As shown, the two small holes opened at the upper end of the grouting core tube 1, the connecting line of the two passes through the center line of the grouting core tube 1, and coincides with any diameter of the grouting core tube 1. The two small holes opened at the upper end of the grouting core tube 1 have a diameter slightly larger than the diameter of the steel bar 2, both ends of the steel bar 2 are provided with threads 22, and the threads 22 are located near the small holes, and the steel bar 2 is connected to the grouting core tube 1 through a nut 21.

[0032] like Figure 1-4 As shown, this embodiment also has the following working method:

[0033] Drilling is carried out using mud wall protection.

[0034] After the hole is formed, the casing material is poured to displace the mud.

[0035] Fix the inverted L-shaped arc steel plate and the sleeve valve pipe firmly with bolts, and lower the sleeve raft pipe to the center of the drill hole.

[0036] Connect the steel bars to the grouting core tube through nuts, connect the pull rod to the upper part of the grouting core tube, and mark the pull rod to facilitate the determination of the position of the steel bars on the grouting core tube.

[0037] Move the grouting core tube by the pull rod, move the grouting core tube to the top of the inverted L-shaped arc steel plate, rotate the pull rod to adjust the position of the steel bar, and make the steel bar fit into the groove on the inverted L-shaped arc steel plate.

[0038] The airbags are inflated to expand the airbags at the upper and lower ends of the grouting core tube to form a closed space, and the closed space covers the slurry outlet holes on the sleeve valve tube.

[0039] Lower the grouting pipe for grouting.

[0040] Through the above steps, the grouting core tube can be accurately positioned, and precise grouting of the area to be reinforced in the stratum can be achieved, thereby improving the sleeve valve tube grouting accuracy and grouting efficiency.

[0041] The beneficial technical effect of this embodiment is as follows: by arranging two inverted L-shaped arc steel plates on the inner wall of the sleeve valve tube at a certain distance from the upper part of the slurry outlet hole, the grouting core tube can be accurately positioned so that the slurry outlet hole is located in the enclosed space formed by the inflatable bags at the upper and lower ends of the grouting core tube, thereby achieving precise grouting of the formation area to be reinforced, and improving the grouting accuracy and efficiency of the sleeve valve tube.

[0042] Although the above embodiments have described the concepts and embodiments of the purpose of the utility model in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the utility model without departing from the scope of the claims, so they are not described one by one here.

Claims

1. An auxiliary positioning device for a grouting core tube, characterized in that: It includes a grouting core tube and a sleeve valve tube, wherein a steel bar is passed through the upper end of the grouting core tube, and both ends of the steel bar extend to a certain distance outside the grouting core tube, and an inflatable bag is provided at the upper and lower ends of the grouting core tube, and two inverted L-shaped arc steel plates are installed on the inner wall of the sleeve valve tube, and a groove is opened on the two inverted L-shaped arc steel plates, and the two grooves are arranged opposite to each other and are respectively used to place the two ends of the steel bar.

2. The auxiliary positioning device for a grouting core pipe according to claim 1, characterized in that: The sleeve valve tube is provided with a plurality of pulp outlet holes, and the sleeve valve tube is sleeved with a rubber sleeve wrapped around the pulp outlet holes.

3. The auxiliary positioning device for a grouting core pipe according to claim 2, characterized in that: The slurry outlet holes are arranged along the circumference of the sleeve valve tube, and the slurry outlet holes are distributed in a plum blossom shape.

4. The auxiliary positioning device for a grouting core pipe according to claim 1, characterized in that: The grouting core tube is provided with a plurality of grout outlets.

5. The auxiliary positioning device for a grouting core pipe according to claim 1, characterized in that: The upper end of the grouting core tube is connected with a pull rod.

6. The auxiliary positioning device for a grouting core pipe according to claim 1, characterized in that: A gap is formed between the two inverted L-shaped arc steel plates to allow the steel bars to pass through.

7. The auxiliary positioning device for a grouting core pipe according to claim 2, characterized in that: The steel bars are located above the two air bags, and the two inverted L-shaped arc steel plates are both located above the slurry outlet holes.

8. The auxiliary positioning device for a grouting core pipe according to claim 1, characterized in that: The distance that the end of the steel bar extends to the outside of the grouting core tube is greater than the distance from the outer wall of the grouting core tube to the inner edge of the inverted L-shaped arc steel plate, and is less than the distance from the outer wall of the grouting core tube to the inner wall of the sleeve valve tube.

9. The auxiliary positioning device for a grouting core pipe according to claim 1, characterized in that: The inverted L-shaped arc steel plate and the sleeve valve pipe, as well as the steel bars and the grouting core pipe are fixed by a bolt structure.

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