Drilling and grouting device for karst area

Abstract

The utility model relates to a karst area drilling grouting device which comprises a grouting pipe, a fixing structure is arranged on the periphery, close to the tail end, of the grouting pipe, and the fixing structure comprises a fixing disc surrounding the grouting pipe; the driving ring is arranged on the periphery of the grouting pipe in a sliding mode, and the driving ring and the fixing disc are arranged at intervals; the claw part comprises a claw body rotationally arranged on the fixed disc, the claw body is divided into an exposed end and an extending end relative to the rotating center of the claw body, and the exposed end of the claw body is rotationally connected with the driving ring through a driving arm; when the driving ring slides along the track of the grouting pipe, the driving arms can be pulled to drive the extending ends of the claw bodies to expand outwards and abut against the wall of a drill hole. Through the arrangement of the fixing structure, the driving claw body rotates to enable the barbs to pierce the wall of a drill hole, relative stability between the grouting pipe and the drill hole can be guaranteed after the grouting pipe pierces into the drill hole, and stable grouting is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of drilling and grouting, particularly relates to a karst area drilling and grouting device. BACKGROUND

[0002] When carrying out engineering construction in karst areas, due to the special geological conditions of karst areas, such as a large number of karst caves, corrosion fissures and the like, the stability of the foundation is poor. In order to improve the bearing capacity and stability of the foundation, drilling and grouting is a commonly used and effective method.

[0003] However, in actual drilling and grouting, in order to avoid backflow of the slurry, a liquid-filled or air-filled capsule is wrapped around the outer periphery of the grouting pipe to achieve sealing at the drilling hole; however, as the pressure of the backflowing slurry increases, the grouting pipe is not firmly supported by the static friction between the capsule and the drilling hole wall, and is easily displaced by being pushed up, which is not conducive to smooth grouting. UTILITY MODEL CONTENTS

[0004] The utility model discloses to the problem that the grouting pipe is lack of fixing structure after being inserted into the drilling hole and is easily pushed out in the prior art, and provides a karst area drilling and grouting device, a fixing structure is arranged on the circumference of the grouting pipe, the fixing structure can be radially opened after being inserted into the drilling hole to stab the drilling hole wall, so that the grouting pipe can be smoothly grouted, and the specific technical scheme is as follows:

[0005] The utility model provides a karst area drilling and grouting device, which comprises a grouting pipe, a fixing structure is arranged on the outer periphery of the grouting pipe close to the tail end, and the fixing structure comprises:

[0006] A fixing disc is arranged around the outer periphery of the grouting pipe;

[0007] A driving ring is slidably arranged on the outer periphery of the grouting pipe and is spaced apart from the fixing disc;

[0008] A claw part is arranged on the fixing disc, the claw part comprises a claw body, the claw body is divided into an exposed end and an inserted end relative to the rotation center of the claw body, and the exposed end of the claw body is rotatably connected to the driving ring through a driving arm;

[0009] When the driving ring slides along the trajectory of the grouting pipe, the driving arm can be pulled to drive the inserted end of the claw body to expand outward and press against the drilling hole wall.

[0010] As a further technical scheme of the utility model, the inserted end of the claw body is provided with a barb, and the barb can stab the drilling hole wall when the claw body expands.

[0011] As a further technical scheme of the utility model, the claw part further comprises a notch arranged on the fixing disc and a fixing shaft arranged in the notch, and the claw body is sleeved on the fixing shaft and rotates around the fixing shaft when being driven.

[0012] As a further technical scheme of the utility model, the claw part is provided with several groups and is uniformly distributed around the grouting pipe.

[0013] As a further technical scheme of the utility model, the driving ring is rotationally connected with a rotating ring on the end face away from the fixing disc, and the rotating ring is rotationally connected with the grouting pipe.

[0014] The utility model has the advantages of the following:

[0015] (1) In the application, the barb is made to pierce the drill hole wall by rotating the driving claw body, so that the relative stability between the grouting pipe and the drill hole is ensured after the grouting pipe is pierced into the drill hole, and the grouting is facilitated.

[0016] (2) In the application, the claw body only partially extends into the drill hole, and the extension part can be unfolded by operating the exposed part, so that the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure schematic view of the fixing structure in the rock dissolution area drill hole grouting device is shown when it is folded;

[0018] Figure 2 A structure schematic view of the fixing structure in the rock dissolution area drill hole grouting device is shown when it is unfolded;

[0019] Figure 3 A structure schematic view of the fixing structure is shown;

[0020] Figure 4 A structure schematic view of the claw part is shown.

[0021] LEGEND:

[0022] 100, body; 110, grouting pipe; 120, interface; 130, capsule; 200, fixing structure; 210, fixing disc; 220, driving ring; 230, rotating ring; 240, claw part; 241, notch; 242, fixing shaft; 243, claw body; 244, driving arm; 245, barb. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the utility model technical scheme will be clearly and completely described below in combination with embodiments.

[0024] Figure 1 A structure schematic view of the fixing structure 200 in the rock dissolution area drill hole grouting device is shown when it is folded; Figure 2 A structure schematic view of the fixing structure 200 in the rock dissolution area drill hole grouting device is shown when it is unfolded; Figure 1 andFigure 2 The karst area drilling and grouting device comprises a body 100 and a fixing structure 200 installed on the body 100, the body 100 comprises a grouting pipe 110, the grouting pipe 110 has an insertion end and a tail end, as shown, the insertion end of the grouting pipe 110 is in the same direction as the insertion direction of the drilling hole, and the tail end of the grouting pipe 110 is in the opposite direction; the tail end of the grouting pipe 110 is communicated with a connector 120, the connector 120 is used for externally connecting a grout source, the grouting pipe 110 is wrapped with a capsule 130, the capsule 130 is externally connected with a fluid source through a pipeline, and the fluid introduced by the fluid source can be gas or liquid; in the operation of the prior art, the insertion end of the grouting pipe 110 is inserted into the drilling hole and the capsule 130 is completely inserted into the drilling hole, then the fluid source is connected to introduce fluid into the capsule 130, the capsule 130 is inflated and completely adheres to the wall of the drilling hole, the plugging of the drilling hole is realized, and the backflow of the grout is avoided. Figure 1

[0025] Figure 3 A structural diagram of the fixing structure 200 is shown; Figure 3 In the embodiment, the fixing structure 200 is installed on the circumferential wall of the grouting pipe 110 near the tail end, and the fixing structure 200 partially extends into the drilling hole; the fixing structure 200 is partially exposed and partially extends into the drilling hole, the exposed part can be operated to control the extension of the part extending into the drilling hole to realize fixation, so that the operation is more convenient; the fixing structure 200 comprises fixing discs 210 and a driving ring 220 which are arranged at intervals along the insertion direction, the fixing discs 210 and the driving ring 220 are both arranged around the grouting pipe 110, the driving ring 220 is in sliding connection with the grouting pipe 110, the claw part 240 is rotatably arranged on the fixing disc 210, one end of the claw part 240 extends into the drilling hole, and the other end of the claw part 240 is in rotational connection with the driving ring 220; in the installed state, the claw part 240 partially extends into the drilling hole, the exposed part of the claw part 240 is driven to rotate as a whole relative to the rotation center by sliding the driving ring 220, so that the part of the claw part 240 extending into the drilling hole is unfolded and pierced into the drilling hole arm; the rotation ring 230 is rotatably connected to the end face of the driving ring 220 away from the fixing disc 210, and the rotation ring 230 is in threaded connection with the grouting pipe 110; the sliding of the driving ring 220 can be driven by rotating the rotation ring 230, and the driving ring 220 can be kept in the current state when the rotation of the rotation ring 230 is stopped, so that stability is ensured.

[0026] Figure 4 A structural diagram of the claw part 240 is shown; Figure 4 ​In the specific embodiment, the claw part 240 comprises a notch 241 formed on the fixing disc 210, a fixing shaft 242 installed in the notch 241, a claw body 243 rotatably sleeved on the fixing shaft 242, and a driving arm 244 rotatably connected between the claw body 243 and the driving ring 220; the claw body 243 is divided into an exposed end and an inserted end by the fixing shaft 242, the exposed end is an end facing the driving ring 220, and the inserted end is an end inserted into the drill hole; the driving arm 244 is pulled to draw the exposed end of the claw body 243 to drive the claw body 243 to swing around the fixing shaft 242 under the sliding of the driving ring 220, at this time, the inserted end of the claw body 243 is unfolded outward; the inserted end of the claw body 243 is provided with a backbend barb 245; the barb 245 can be matched with the unfolding of the claw body 243 to be pierced into the drill hole arm; the claw part 240 is provided with six groups, which are distributed in the circumferential direction of the grouting pipe 110; but in some other embodiments, the number of the claw part 240 is not limited.

[0027] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them.

Claims

1. A drilling and grouting device for karst areas, comprising a grouting pipe (110), characterized in that, The grouting pipe (110) is provided with a fixing structure (200) on the outer periphery near the tail end, the fixing structure (200) comprises: a fixing disc (210) surrounding the grouting pipe (110); a driving ring (220) slidingly arranged on the outer periphery of the grouting pipe (110) and spaced apart from the fixing disc (210); and a claw part (240) comprising a claw body (243) rotatably arranged on the fixing disc (210), the claw body (243) is divided into an exposed end and an inserted end relative to the rotation center of the claw body (243), the exposed end of the claw body (243) is rotatably connected to the driving ring (220) through a driving arm (244); When the driving ring (220) slides along the trajectory of the grouting pipe (110), the driving arm (244) can be pulled to drive the inserted end of the claw body (243) to expand outward and press against the borehole wall.

2. The device for drilling and grouting in karst areas according to claim 1, characterized in that, The inserted end of the claw body (243) has a back-bent barb (245), which can stab the borehole wall when the claw body (243) expands.

3. The device for drilling and grouting in karst areas according to claim 2, characterized in that, The claw part (240) further comprises a notch (241) opened on the fixing disc (210) and a fixing shaft (242) installed in the notch (241), the claw body (243) is sleeved on the fixing shaft (242) and rotates around the fixing shaft (242) when driven.

4. The device for drilling and grouting in karst areas according to any one of claims 1-3, characterized in that, The claw part (240) is provided with several groups and is uniformly distributed around the grouting pipe (110).

5. The grouting device for boreholes in karst areas according to claim 4, wherein the end surface of the driving ring (220) away from the fixing disc (210) is rotatably connected with a rotating ring (230), the rotating ring (230) is rotatably connected with the grouting pipe (110).

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