Directional drilling construction equipment for subsidence area

Abstract

The utility model discloses directional drilling construction equipment for a subsidence area, which is characterized in that a concrete retaining wall is arranged on the lower side of an abrupt slope of the subsidence area, a through hole is drilled in the abrupt slope of the subsidence area, one side of the concrete retaining wall is connected with a drill rod, and the drill rod enters from a penetrating point of the through hole and finally extends out from an unearthing point of the through hole. A prefabricated pipe is arranged on the higher side of the abrupt slope in the subsidence area, and a PE protection sleeve is connected to the outer side of the prefabricated pipe in a sleeved mode. Due to the arrangement of the concrete retaining wall, the whole directional drilling construction is in a relatively closed state, the phenomenon that slurry flows back due to the gravity of the slurry in the construction process can be effectively prevented, and the construction efficiency is improved. And the reserved hole, the plastic pipe, the bentonite woven bag plugging layer and the oil hemp plugging ring are arranged in the concrete retaining wall, so that the drill rod is convenient to move and rotate, meanwhile, the connecting gap between the drill rod and the concrete retaining wall is plugged, and a better slurry backflow prevention effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline construction, in particular to directional drilling construction equipment in a collapsed area. Background Art

[0002] At present, in the process of laying pipelines, when constructing in the subsidence area, when encountering a large height difference in the construction site, a short construction distance, and complex underground pipelines, it is impossible to adopt the direct excavation method. At present, directional drilling is used for construction. Directional drilling is a common construction process in trenchless technology. It is widely used in the laying of pipelines for water supply, electricity, telecommunications, natural gas, heating, etc. It is suitable for construction in a variety of soil conditions from soft soil to hard rock and complex terrain. Under normal circumstances, the height difference of the entry and exit points in directional drilling construction is basically the same, and the guidance and mud pump pressure can be better controlled during the construction process;

[0003] However, when there is a large height difference between the entry and exit points of the construction site, the traditional directional drilling construction method will result in excessive mud pressure on the side with low elevation during construction, which is prone to the risk of slurry leakage. The excessive pressure of the mud pump also brings inconvenience to hole expansion and hole washing. In addition, the large height difference between the entry and exit points of the construction site makes it difficult for the subsequent prefabricated pipes to be dragged back due to the lack of mud buoyancy on the side with higher terrain when the prefabricated pipes are dragged back, causing scratches on the anti-corrosion layer and affecting the subsequent use of the prefabricated pipes. Utility Model Content

[0004] The utility model provides a directional drilling construction equipment for a subsidence area, which can effectively solve the problem proposed in the above background technology that when the height difference between the entry and exit points of the construction site is large, the mud pressure on the side with low elevation is too large during the construction process, which is prone to the risk of slurry leakage, and the excessive pressure of the mud pump also brings inconvenience to hole expansion and hole washing. In addition, the height difference between the entry and exit points of the construction site is large, so that when the subsequent prefabricated pipe is towed back, the prefabricated pipe lacks mud buoyancy on the side with higher terrain when towing back, and the prefabricated pipe will be hard-dragged on the ground, causing its anti-corrosion layer to be scratched, affecting the subsequent use of the prefabricated pipe.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a directional drilling construction equipment in a subsidence area, comprising a steep slope in the subsidence area, a concrete retaining wall is arranged on the lower side of the steep slope in the subsidence area, a through hole is drilled inside the steep slope in the subsidence area, a drill rod is connected to one side of the concrete retaining wall, the drill rod enters from the entry point of the through hole and finally extends from the exit point of the through hole, a prefabricated pipe is arranged on the higher side of the steep slope in the subsidence area, a PE protective sleeve is sleeved on the outer side of the prefabricated pipe, and the end of the prefabricated pipe and the PE protective sleeve away from the through hole is welded and fixed by a welding blind plate;

[0006] A reserved hole is provided at the edge of the concrete retaining wall corresponding to the drill rod, and a plastic pipe is fitted and clamped on the inner side of the reserved hole. The inner side of the plastic pipe is sealed by a bentonite woven bag sealing layer, and the outer side of the drill rod is sealed by hemp sealing rings at the inner and outer edges of the concrete retaining wall.

[0007] Preferably, the prefabricated pipe corresponds to the position of the unearthed point of the perforation, and the prefabricated pipe enters from the unearthed point of the perforation for back-pulling, and the PE protective sleeve directly contacts the hole wall of the perforation instead of the prefabricated pipe during back-pulling.

[0008] Preferably, the inner diameter of the reserved hole matches the diameter of the drill rod, and the drill rod is rotatably connected to the plastic pipe.

[0009] Preferably, a mud pump is installed at a corner position on one side of the interior of the concrete retaining wall, the mud pump is powered by an external power supply, and the output end of the mud pump is connected to a mud discharge pipe, and the mud discharge pipe passes through the concrete retaining wall.

[0010] Preferably, a concrete mounting block is cast on one side of the concrete retaining wall, and a sewage trough is provided inside the concrete mounting block and on the side of the concrete retaining wall;

[0011] A stretching groove is provided on the inner side of the concrete mounting block in the vertical direction, a blocking plate is slidably connected to the inner side of the stretching groove, a movable plate is connected to the top of the blocking plate, a screw is threadedly connected to the inside of one side of the movable plate, and the other side of the movable plate is slidably connected to the outer side of the guide column.

[0012] Preferably, the area of ​​the blocking plate is larger than the cross-sectional area of ​​the sewage trough, the bottom of the screw is connected to the concrete mounting block for limited rotation, and a turntable is provided on the top of the screw, a guide hole is opened inside the movable plate, and the guide column is fitly connected in the guide hole.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model has a scientific and reasonable structure and is safe and convenient to use:

[0014] 1. By setting up a concrete retaining wall on the lower side of the steep slope in the collapse area, the size and thickness of the concrete retaining wall can be determined according to the height difference on both sides of the entry and exit points and the maximum size of the reamer. By setting up the concrete retaining wall, the entire directional drilling construction is in a relatively closed state, which can effectively prevent the mud from flowing back due to its own gravity during the construction process. In addition, by setting up reserved holes, plastic pipes, bentonite woven bag sealing layers and hemp sealing rings in the concrete retaining wall, it is not only convenient to move and rotate the drill rod, but also to seal the connection gaps therebetween, which can better prevent the mud from flowing back. In addition, by setting up a mud pump on the inner side of the concrete retaining wall, it is convenient to discharge the mud intercepted and collected in the concrete retaining wall, which is easy to operate.

[0015] 2. By sleeved PE protective sleeve on the outside of the prefabricated pipe, and welding the ends of the prefabricated pipe and the PE protective sleeve by welding blind plates, the PE protective sleeve and the prefabricated pipe can be prevented from detaching. The installation of the PE protective sleeve can effectively supplement the concrete retaining wall measures. The PE protective sleeve is installed on the outer layer of the prefabricated pipe to prevent the prefabricated pipe from directly contacting the hole wall, which can better protect the pipeline anti-corrosion layer from scratches and effectively protect the anti-corrosion layer of the prefabricated pipe.

[0016] 3. By setting concrete mounting blocks and drainage troughs on the edges of the concrete retaining wall, the mud and residual dirt in the concrete retaining wall can be discharged quickly and conveniently, thereby improving the convenience of subsequent cleaning. The stretching groove, screw rod and guide column are used to conveniently drive the movable plate to move up and down, so that the sealing plate can be raised and lowered in the stretching groove to open and close the drainage trough, further improving the convenience of cleaning the dirt inside the concrete retaining wall after the pipe is buried. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0018] In the attached picture:

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the operation of the drill rod of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the plastic pipe of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the PE protective casing of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the concrete installation block of the utility model;

[0024] Numbers in the figure: 1. Steep slope in the collapsed area; 2. Concrete retaining wall; 3. Perforation; 4. Drill rod; 5. Prefabricated pipe; 6. PE protective casing; 7. Welded blind plate; 8. Reserved holes; 9. Plastic pipe; 10. Bentonite woven bag sealing layer; 11. Hemp sealing ring; 12. Mud pump; 13. Concrete mounting block; 14. Sewage trough; 15. Stretching trough; 16. Sealing plate; 17. Moving plate; 18. Screw; 19. Guide column. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] Example: Figure 1-5 As shown, the utility model provides a technical solution, a directional drilling construction equipment for a subsidence area, comprising a steep slope 1 in the subsidence area, a concrete retaining wall 2 is arranged on the lower side of the steep slope 1 in the subsidence area, a mud pump 12 is installed at a corner position on one side inside the concrete retaining wall 2, the mud pump 12 is powered by an external power supply, and the output end of the mud pump 12 is connected to a mud discharge pipe, and the mud discharge pipe passes through the concrete retaining wall 2, so that the mud intercepted and collected in the concrete retaining wall 2 can be discharged conveniently, and the operation is convenient, a through hole 3 is drilled inside the steep slope 1 in the subsidence area, and a drill rod 4 is connected to one side of the concrete retaining wall 2, The drill rod 4 enters from the entry point of the perforation 3 and finally extends from the unearthed point of the perforation 3. A prefabricated pipe 5 is arranged on the side with higher terrain of the steep slope 1 in the collapse area. A PE protective sleeve 6 is sleeved on the outer side of the prefabricated pipe 5. The prefabricated pipe 5 corresponds to the unearthed point of the perforation 3. The prefabricated pipe 5 enters from the unearthed point of the perforation 3 for back-pulling. When back-pulling, the PE protective sleeve 6 directly contacts the hole wall of the perforation 3 instead of the prefabricated pipe 5, preventing the prefabricated pipe 5 from directly contacting the hole wall, which can better protect the pipeline anti-corrosion layer from being scratched. The prefabricated pipe 5 and the PE protective sleeve 6 are welded and fixed at one end away from the perforation 3 through a welding blind plate 7;

[0027] A reserved hole 8 is provided at the edge of the concrete retaining wall 2 corresponding to the drill rod 4, and a plastic tube 9 is fitted and clamped on the inner side of the reserved hole 8. The inner diameter of the reserved hole 8 matches the diameter of the drill rod 4. The drill rod 4 is rotatably connected to the plastic tube 9, which facilitates the movement and rotation of the drill rod 4. At the same time, the connection gap therebetween is sealed to better prevent mud backflow. The inner side of the plastic tube 9 is sealed by a bentonite woven bag sealing layer 10, and the outer side of the drill rod 4 is located at the inner and outer edges of the concrete retaining wall 2 and is sealed by hemp sealing rings 11 respectively.

[0028] A concrete mounting block 13 is cast on one side of the concrete retaining wall 2, and a sewage trough 14 is provided inside the concrete mounting block 13 and on the side of the concrete retaining wall 2;

[0029] A stretching groove 15 is provided on the inner side of the concrete mounting block 13 in the vertical direction, and a sealing plate 16 is slidably connected to the inner side of the stretching groove 15, and a movable plate 17 is connected to the top of the sealing plate 16. A screw 18 is threadedly connected to the inside of one side of the movable plate 17, and the other side of the movable plate 17 is slidably connected to the outside of the guide column 19. The area of ​​the sealing plate 16 is larger than the cross-sectional area of ​​the sewage trough 14. The bottom of the screw 18 is connected to the concrete mounting block 13 for limited rotation, and a turntable is provided on the top of the screw 18. A guide hole is provided inside the movable plate 17, and the guide column 19 is fitted and connected in the guide hole, so as to facilitate the movable plate 17 to be lifted and lowered, so that the sealing plate 16 is lifted and lowered in the stretching groove 15, and the sewage trough 14 is opened and closed.

[0030] Working principle and use process of the utility model: In the actual construction application process, the directional drilling construction equipment in the subsidence area is mainly used in the directional drilling construction site with large height difference and short distance in the subsidence area. First, install the drilling rig and supporting equipment. Before the directional construction, check whether the power supply of the directional system is intact, check whether the receiver and the remote synchronous monitor channel match, and test the interference signal in the construction area to determine the appropriate transmission and reception frequency;

[0031] Next, the entry point of the perforation 3 is set on the side of the steep slope 1 in the subsidence area with a lower terrain, and the exit point of the perforation 3 is set on the side of the steep slope 1 in the subsidence area with a higher terrain, and the concrete retaining wall 2 is set around the entry point of the perforation 3. Taking the DN300 reamer size and the 10-meter height difference of the steep slope 1 in the subsidence area as an example, the size of the concrete retaining wall 2 is set to 2m*2m*0.5m, which can play a better blocking effect. A hole is reserved in the middle of the concrete retaining wall 2 with a plastic pipe 9, so that a reserved hole 8 is formed inside the concrete retaining wall 2. The reserved hole 8 is the rotation gap of the drill rod 4, and the size is consistent with the diameter of the drill rod 4. The reserved hole 8 is blocked with a bentonite woven bag, and the end is assisted with oil hemp, which can play a better effect of preventing mud from flowing back.

[0032] During the drilling process, the drilling rig drives the drill rod 4 to rotate and move, and the drill rod 4 enters from the perforation 3 on the lower side of the steep slope 1 in the subsidence area, and passes out from the higher side of the steep slope 1 in the subsidence area. During the drilling, the setting of the concrete retaining wall 2 makes the entire directional drilling construction in a relatively closed state, which can effectively prevent the mud from flowing back due to its own gravity during the construction process. In addition, by means of the reserved holes 8, the plastic pipe 9, the bentonite woven bag sealing layer 10 and the oil hemp sealing ring 11, not only the movement and rotation of the drill rod 4 are facilitated, but also the connection gaps therebetween are sealed, which can better prevent the mud from flowing back.

[0033] When the prefabricated pipe 5 needs to be dragged into the steep slope 1 in the subsidence area, the PE protective sleeve 6 is first sleeved on the outer side of the prefabricated pipe 5, and the ends of the prefabricated pipe 5 and the PE protective sleeve 6 are welded and fixed by welding blind plates 7 to prevent the PE protective sleeve 6 from being separated from the prefabricated pipe 5. Then, the prefabricated pipe 5 and the PE protective sleeve 6 are connected to the back-dragging rotating joint of the drilling rig on the side with higher terrain of the steep slope 1 in the subsidence area. When back-dragging, starting from the excavation point, the drill rod 4 is driven by the drilling rig turntable to rotate and retreat to expand the hole and back-drag. When the prefabricated pipe 5 is back-dragged, the PE protective sleeve 6 on its outer side is used to prevent the prefabricated pipe 5 from directly contacting the hole wall. While reducing the back-dragging resistance, the anti-corrosion layer of the pipeline can be better protected from scratches, and the anti-corrosion layer of the prefabricated pipe 5 can be effectively protected.

[0034] Finally, after the drilling is completed, when it is necessary to clean the mud in the concrete retaining wall 2, a mud pump 12 is set on the inner side of the concrete retaining wall 2 to facilitate the discharge of the mud intercepted and collected in the concrete retaining wall 2. At the same time, a concrete mounting block 13 and a drain trough 14 are set on the edge of the concrete retaining wall 2 to facilitate the rapid discharge of the mud and residual dirt in the concrete retaining wall 2, thereby improving the convenience of subsequent cleaning. The stretching groove 15, the screw 18 and the guide column 19 are used to conveniently drive the movable plate 17 to perform lifting activities, so that the sealing plate 16 is lifted and lowered in the stretching groove 15, and the drain trough 14 is opened and closed, further improving the convenience of cleaning the dirt inside the concrete retaining wall 2 after the pipe is buried.

[0035] Finally, it should be noted that the above description is only a preferred example of the present utility model and is not intended to limit the present utility model. Although the present utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A directional drilling construction equipment for a subsidence area, comprising a steep slope in the subsidence area (1), characterized in that: A concrete retaining wall (2) is arranged on the lower side of the steep slope (1) in the subsidence area, a through hole (3) is drilled inside the steep slope (1) in the subsidence area, a drill rod (4) is connected to one side of the concrete retaining wall (2), the drill rod (4) enters from the entry point of the through hole (3) and finally extends from the exit point of the through hole (3), a prefabricated pipe (5) is arranged on the higher side of the steep slope (1) in the subsidence area, a PE protective sleeve (6) is sleeved on the outer side of the prefabricated pipe (5), and the end of the prefabricated pipe (5) and the PE protective sleeve (6) away from the through hole (3) are welded and fixed by a welding blind plate (7); A reserved hole (8) is provided at the edge of the concrete retaining wall (2) corresponding to the drill rod (4), and a plastic pipe (9) is fitted and clamped inside the reserved hole (8), the inside of the plastic pipe (9) is sealed by a bentonite woven bag sealing layer (10), and the outside of the drill rod (4) is sealed at the inner and outer edges of the concrete retaining wall (2) by hemp sealing rings (11).

2. The directional drilling construction equipment for subsidence area according to claim 1, characterized in that: The prefabricated pipe (5) corresponds to the position of the unearthed point of the perforation (3), and the prefabricated pipe (5) enters from the unearthed point of the perforation (3) for back-pulling, and the PE protective sleeve (6) directly contacts the hole wall of the perforation (3) instead of the prefabricated pipe (5) during back-pulling.

3. The directional drilling construction equipment for subsidence area according to claim 1, characterized in that: The inner diameter of the reserved hole (8) matches the diameter of the drill rod (4), and the drill rod (4) is rotatably connected to the plastic pipe (9).

4. The directional drilling construction equipment for subsidence area according to claim 1, characterized in that: A mud pump (12) is installed at a corner position on one side of the interior of the concrete retaining wall (2), the mud pump (12) is powered by an external power supply, and the output end of the mud pump (12) is connected to a mud discharge pipe, and the mud discharge pipe passes through the concrete retaining wall (2).

5. The directional drilling construction equipment for subsidence area according to claim 1, characterized in that: A concrete installation block (13) is cast on one side edge of the concrete retaining wall (2), and a sewage trough (14) is provided inside the concrete installation block (13) and on the edge of the concrete retaining wall (2); The inner side of the concrete mounting block (13) is provided with a stretching groove (15) in the vertical direction, the inner side of the stretching groove (15) is fitted with a blocking plate (16) for sliding connection, the top of the blocking plate (16) is connected to a moving plate (17), one side of the moving plate (17) is internally connected to a screw rod (18) through a thread, and the other side of the moving plate (17) is slidably connected to the outer side of a guide column (19).

6. The directional drilling construction equipment for subsidence area according to claim 5, characterized in that: The area of ​​the blocking plate (16) is larger than the cross-sectional area of ​​the sewage trough (14); the bottom of the screw rod (18) is connected to the concrete mounting block (13) in a limited rotation manner, and a turntable is provided on the top of the screw rod (18); a guide hole is provided inside the movable plate (17), and the guide column (19) is fitted and connected in the guide hole.

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