Large-caliber lifesaving channel construction device with grouting and water stopping functions

Abstract

The utility model provides a large-caliber lifesaving channel construction device with grouting and water stopping functions, which comprises a head pipe, a plurality of intermediate pipes and a tail pipe which are distributed from top to bottom, and the plurality of intermediate pipes can be repeatedly increased to realize continuous extension; the head pipe, the middle pipe and the tail pipe are of a double-wall concentric pipe body structure and each comprise an inner pipe, an outer pipe and a grouting pipe, a cutting tooth drill bit is arranged at the bottom end of the tail pipe, a grouting opening extending out of the wall of the outer pipe is formed in the upper end of the grouting pipe of the head pipe, and three grout outlets are formed in the bottom of the tail pipe. The utility model is matched with the rotary drilling rig for use, can quickly construct a large-caliber lifesaving channel with grouting and water stopping functions, and has the advantages of high channel construction speed, stable and reliable structure and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of emergency rescue, in particular to a large-diameter rescue passage construction device with a grouting water-stop function. Background Technique

[0002] The scientific development and utilization of underground space resources is an important way to solve the problems of "big city diseases", optimize the urban spatial structure, improve the urban ecological environment, and enhance the resilience of urban development. In China, the newly added underground space floor area is huge, the subway operation mileage is increasing, and the comprehensive pipe gallery projects are significantly increasing. The underground space is of reinforced concrete structure, with a maximum burial depth of 50 meters, below the aquifer. In the event of a collapse accident in the underground space, causing people to be trapped, traditional excavation rescue faces difficulties such as large excavation difficulty, large excavation volume, and shallow water level, making it difficult to give full play to the advantages of the equipment itself and difficult to meet the requirements of fast, safe, and reliable rescue. Due to the lack of advanced and applicable rescue technologies and equipment, the rescue force is unable to cope when faced with the collapse accident of deeply buried underground space, and the rescue force lacks advanced and applicable rescue "weapons". Using a rotary drilling rig to carry out large-diameter drilling operations at a designated location can quickly connect to the underground space. However, after the rotary drilling rig in the prior art drills through the roof of the underground space, the water in the aquifer will backfill into the underground space, resulting in secondary accidents and unable to ensure the safety of people's lives. Therefore, it is necessary to develop a new large-diameter rescue passage construction device with a grouting water-stop function to solve the above technical problems. Summary of the Invention

[0003] The technical problem solved by the utility model is to provide a large-diameter rescue passage construction device with a grouting water-stop function. The device is used in conjunction with a rotary drilling rig and can quickly construct a large-diameter rescue passage with a grouting water-stop function, having the advantages of fast passage construction speed, stable and reliable structure, and low cost.

[0004] The utility model adopts the following technical solutions: A large-diameter life-saving passage construction device with a grouting water-stop function, which is characterized in that it includes a head pipe, an intermediate pipe, and a tail pipe distributed from top to bottom. The head pipe is connected to the intermediate pipe below, and there are several intermediate pipes. The intermediate pipes can be repeatedly added to achieve continuous extension. The lowermost intermediate pipe is connected to the tail pipe below; the head pipe, the intermediate pipe, and the tail pipe are double-wall concentric pipe structures, all including an inner pipe and an outer pipe. Grouting pipes are provided in the annular gap between the inner pipe and the outer pipe. The inner pipes, outer pipes, and grouting pipes connected up and down are all connected by male and female joint plugging methods; a pick bit is provided at the bottom end of the tail pipe, and a grouting port extending out of the outer pipe wall is provided at the upper end of the grouting pipe of the head pipe. Three slurry outlets are provided on the outer pipe wall above the pick bit at the bottom of the tail pipe. The bottom end of the grouting pipe of the tail pipe is communicated with the three slurry outlets by means of a four-way joint; torsion keys and fastening light holes are provided at the upper ends of the head pipe and the intermediate pipe, and torsion grooves and fastening threaded holes are provided at the bottom ends; a torsion groove and a fastening light hole are provided at the upper end of the tail pipe. When the torsion key is inserted into the torsion groove between the upper and lower pipe bodies and the fastening threaded hole coincides with the fastening light hole, a fastening bolt is used to pass through the fastening light hole and tighten and fix it with the fastening threaded hole.

[0005] Further, radial stop blocks and axial stop blocks for ensuring the stable connection between the inner pipe and the outer pipe are welded on the outer wall of the inner pipe. The radial stop blocks are located at the middle position of the inner pipe wall, and the axial stop blocks are located at both ends of the outer wall of the inner pipe.

[0006] Further, the grouting pipe is fixed on the outer wall of the inner pipe by a clamping block, and the clamping block is welded to the outer wall of the inner pipe.

[0007] Further, the male and female joints of the grouting pipe are connected by a 24-degree tapered joint, and an O-ring is provided in the middle of the male joint of the grouting pipe.

[0008] The utility model has the following beneficial effects:

[0009] The utility model is used in conjunction with a rotary drilling rig to construct a large-diameter life-saving passage. The construction path of the passage is short and the speed is fast, which wins precious golden rescue time for the trapped people. The utility model utilizes the head pipe, the intermediate pipe, and the tail pipe of the double-wall concentric pipe structure to penetrate up and down as a life-saving passage. The high-strength double-wall pipe body plays a role in supporting and stabilizing the soil body, and the structure is firm, safe and reliable. When using the utility model to construct a life-saving passage, a solid water-stop belt is formed outside the passage during the construction process, isolating people from dangerous substances such as water, soil, etc., preventing secondary accidents such as groundwater backflow, sand gushing, and mud gushing, and ensuring the safety of personnel's lives; when using the utility model to construct a life-saving passage, there is no need to excavate and transport a large amount of earth and stone, the input of equipment and manpower is small, and the on-site restoration workload is small, greatly reducing the cost of passage construction. Description of the Drawings

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 Schematic diagram of the head tube structure of the present utility model;

[0012] Figure 3 Schematic diagram of the intermediate tube structure of the present utility model;

[0013] Figure 4 is Figure 3 Schematic diagram of the A-A cross-section of;

[0014] Figure 5 is Figure 3 Schematic diagram of the B-B cross-section of;

[0015] Figure 6 is Figure 3 Schematic diagram of the C-C cross-section of;

[0016] Figure 7 Schematic diagram of the tail tube structure of the present utility model;

[0017] Figure 8 is Figure 7 Schematic diagram of the D-D cross-section of;

[0018] Figure 9 Schematic diagram of the male and female joints of the grouting pipe of the present utility model;

[0019] Figure 10 Schematic diagram of the distribution of the axial stop blocks of the present utility model;

[0020] Figure 11 Schematic diagram of the connection between the clamping block and the grouting pipe of the present utility model;

[0021] Figure 12 Schematic diagram of the distribution of the water stop belts outside the life-saving passage constructed by the present utility model;

[0022] The corresponding component names in the figure are: 1 head tube; 2 intermediate tube; 3 tail tube; 4 inner tube; 5 outer tube; 6 grouting pipe; 7 pick bit; 8 grouting port; 9 slurry outlet; 10 four-way joint; 11 torque key; 12 fastening light hole; 13 torque groove; 14 fastening threaded hole; 15 fastening bolt; 16 radial stop block; 17 axial stop block; 18 clamping block; 19 O-ring. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings.

[0024] Please refer to Figures 1-12As shown in the figure, the utility model provides a large-diameter life-saving passage construction device with a grouting and water-stop function, which includes a head pipe 1, an intermediate pipe 2, and a tail pipe 3 distributed from top to bottom. The head pipe is connected to the intermediate pipe below, and there are several intermediate pipes. The intermediate pipes can be repeatedly added to achieve continuous extension, and the lowermost intermediate pipe is connected to the tail pipe below; the head pipe, intermediate pipe, and tail pipe are double-wall concentric pipe structures, all including an inner pipe 4 and an outer pipe 5. Grouting pipes 6 are provided in the annular gap between the inner pipe and the outer pipe. The inner pipes, outer pipes, and grouting pipes connected up and down are all connected by male and female joint insertion methods; a pick bit 7 is provided at the bottom end of the tail pipe, and a grouting port 8 extending out of the outer pipe wall is provided at the upper end of the grouting pipe of the head pipe. Three slurry outlets 9 are provided on the outer pipe wall above the pick bit at the bottom of the tail pipe. The bottom end of the grouting pipe of the tail pipe is connected to the three slurry outlets 9 by a four-way joint 10; torsion keys 11 and fastening light holes 12 are provided at the upper ends of the head pipe and the intermediate pipe, and torsion grooves 13 and fastening threaded holes 14 are provided at the bottom ends; torsion grooves and fastening light holes are provided at the upper end of the tail pipe. When the torsion key is inserted into the torsion groove between the upper and lower pipe bodies and the fastening threaded hole coincides with the fastening light hole, a fastening bolt 15 is used to pass through the fastening light hole and tighten it with the fastening threaded hole for fixation. Radial stop blocks 16 and axial stop blocks 17 for ensuring the stable connection between the inner pipe and the outer pipe are welded on the outer wall of the inner pipe. The radial stop block 16 is arranged at the middle position of the outer wall of the inner pipe to prevent the inner pipe from radially shaking, and the axial stop block 17 is located at both ends of the outer wall of the inner pipe to prevent the inner pipe from axially shaking. The grouting pipe is fixed on the outer wall of the inner pipe by a clamping block 18, and the clamping block is welded to the outer wall of the inner pipe. The male and female joints of the grouting pipe are connected by a 24-degree tapered joint, and an O-ring 19 is provided in the middle of the male joint of the grouting pipe to ensure the connection tightness of the grouting pipe.

[0025] In the specific implementation of the utility model, it is used in conjunction with a rotary drilling rig. When the rotary drilling rig reaches the designated position, a connector and a driving pipe are installed, and then the tail pipe 3 of the utility model is installed to carry out the hole-opening operation and start constructing the passage. During the drilling process, the depth of the passage is continuously increased by adding intermediate pipes 2. When the passage is drilled to the position of the underground space roof, the head pipe 1 is installed at the upper end of the uppermost intermediate pipe above the ground. When it is not time for grouting operation, a plug is used to protect the grouting port 8. When grouting operation is required, the grouting port 8 of the head pipe is connected to a grouting pump. The double-fast cement slurry containing a retarding component is precisely pushed by the grouting pump and is transported through the grouting pipe 6 to be sprayed out from the slurry outlet at the bottom of the tail pipe. Under the coordinated operation of the rotation of the drilling rig and the grouting pump, the jet grouting operation is carried out. The cement slurry slowly rises along the tiny pores between the outer wall of the passage and the formation and gradually spreads. As the cement slurry gradually solidifies, a solid water-stop belt (as shown in Figure 8 the figure) is formed, effectively isolating the passage from the aquifer, ensuring the safety and stability of the passage, and ensuring that after drilling through the roof, groundwater will not backflow into the underground space.

[0026] The above are only the best embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Any person skilled in the art, without departing from the scope of the technical solution of the present utility model, may make many possible changes and modifications to the technical solution of the present utility model by using the method content disclosed above, and all of them fall within the scope protected by the claims.

Claims

1. A large-caliber rescue passage construction device with grouting and water-stopping function, characterized in that: The invention comprises a head pipe, an intermediate pipe and a tail pipe distributed from top to bottom, wherein the head pipe is connected to the intermediate pipe below, and there are several intermediate pipes, which can be repeatedly added to achieve continuous extension, and the lowest intermediate pipe is connected to the tail pipe below; the head pipe, the intermediate pipe and the tail pipe are double-walled concentric pipe structures, and all comprise an inner pipe and an outer pipe, and a grouting pipe is arranged in the annular gap between the inner pipe and the outer pipe, and the inner pipe, the outer pipe and the grouting pipe connected up and down are connected by male and female joints; a pick drill is arranged at the bottom end of the tail pipe, and an extension is arranged at the upper end of the grouting pipe of the head pipe A grouting port extends out of the outer pipe wall, and three grouting ports are arranged on the outer pipe wall above the pick drill bit at the bottom of the tail pipe. The bottom end of the grouting pipe of the tail pipe is connected with the three grouting ports by a four-way connection; torque keys and fastening holes are arranged on the upper ends of the head pipe and the intermediate pipe, and torque grooves and fastening threaded holes are arranged on the bottom ends; a torque groove and a fastening hole are arranged on the upper end of the tail pipe, and the torque key between the upper and lower pipe bodies is inserted into the torque groove. After the fastening threaded hole and the fastening light hole coincide, a fastening bolt is used to pass through the fastening light hole and the fastening threaded hole to tighten and fix them.

2. A large-caliber life-saving passage construction device with grouting and water-stopping function according to claim 1, characterized in that: The outer wall of the inner tube is welded with radial stop blocks and axial stop blocks to ensure stable connection between the inner tube and the outer tube. The radial stop block is located in the middle of the inner tube wall, and the axial stop blocks are located at both ends of the outer wall of the inner tube.

3. A large-caliber life-saving passage construction device with grouting and water-stopping function according to claim 1, characterized in that: The grouting pipe is fixed on the outer wall of the inner pipe by a holding block, and the holding block is welded to the outer wall of the inner pipe.

4. A large-caliber rescue passage construction device with grouting and water-stopping function according to claim 1, characterized in that: The male and female joints of the grouting pipe are connected with a 24-degree cone joint, and an O-ring is provided in the middle of the male joint of the grouting pipe.

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