A conveniently maintained underground support excavation jacking pipe and method of use thereof

Abstract

The application discloses a conveniently-maintained underground support excavation jacking pipe and a use method thereof, which comprises a jacking pipe outer ring and a jacking pipe inner ring, and coaxial arrangement is adopted, outer ring grooves are symmetrically arranged at two ends of the jacking pipe outer ring, inner ring grooves are symmetrically arranged at two ends of the jacking pipe inner ring, a plurality of adjusting slots are arranged on the inner side of the jacking pipe inner ring, connecting mechanisms are arranged at the two ends of the jacking pipe outer ring and the jacking pipe inner ring in cooperation, a plurality of rotating blocks are installed between the jacking pipe outer ring and the jacking pipe inner ring, a plurality of recesses are arranged on the inner wall surface of the rotating block and correspond to the adjusting slots, wherein the connecting mechanism comprises a circular ring plate, outer ring insertion plates and inner ring insertion plates are symmetrically arranged on the two sides of the circular ring plate, the outer ring insertion plates are matched with the outer ring grooves, and the inner ring insertion plates are matched with the inner ring grooves; the rotating block structure is optimized by adopting the above structure, transportation cost is saved, a reserved hole is formed, lateral excavation is facilitated, and maintenance is further facilitated through the plurality of rotating blocks.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking technology, specifically to a convenient maintenance-type downhole support pipe jacking method and its application. Background Technology

[0002] Roadways are various passages drilled between the surface and the ore body, used for ore transportation, ventilation, drainage, pedestrian access, and various necessary preparatory works for newly drilled ore extraction by metallurgical equipment. These passages are collectively referred to as roadways.

[0003] Maintaining unobstructed passageways and stable surrounding rock through roadway support is of great significance for coal mine construction and production. The basic purpose of roadway support is to mitigate and reduce the movement of surrounding rock, prevent excessive reduction in the roadway cross-section, and prevent the collapse of loosened and damaged surrounding rock. However, in roadways hundreds of meters underground, ordinary support becomes ineffective.

[0004] Pipe jacking construction utilizes the thrust of the main jacking cylinder and intermediate sections between pipes to push the tool pipe or tunneling machine through the soil from the working shaft to the receiving shaft, where it is then lifted. Simultaneously, the jacked pipe following the tool pipe or tunneling machine is buried between the two shafts, thus achieving a trenchless underground pipe jacking construction method.

[0005] Most existing development tunnels use reinforced concrete pipe jacking to achieve stability. However, the transportation of concrete pipe jacking hundreds of meters deep underground greatly increases the burden on transportation equipment. The annual maintenance cost per square meter of underground support is very high, and a large amount of manpower is required for inspection. When internal deformation and compression of the rock wall occur, it is usually only known after a small-scale collapse, which is very dangerous. Repairing it also takes a long time. Summary of the Invention

[0006] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide a convenient maintenance type of downhole support excavation pipe jacking and its usage method, which facilitates transportation, reduces transportation burden, improves safety by utilizing the site environment, and facilitates maintenance and saves maintenance costs.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A convenient maintenance type of downhole support excavation jacking pipe includes an outer jacking pipe ring and an inner jacking pipe ring. The inner jacking pipe ring is located inside the outer jacking pipe ring and is coaxially arranged. The outer jacking pipe ring has symmetrical outer ring grooves at both ends, and the inner jacking pipe ring has symmetrical inner ring grooves at both ends. The inner side of the inner jacking pipe ring is provided with multiple sets of adjustment joints. The outer jacking pipe ring and the inner jacking pipe ring are fitted with a connecting mechanism at both ends. Multiple sets of rotating blocks are installed between the outer jacking pipe ring and the inner jacking pipe ring. The inner wall surface of the rotating blocks is provided with multiple grooves, which are corresponding to the adjustment joints.

[0009] The connecting mechanism includes a circular ring plate, with an outer ring insert plate and an inner ring insert plate symmetrically arranged on both sides of the circular ring plate. The inner ring insert plate is located inside the outer ring insert plate, and the outer ring insert plate is adapted to the outer ring groove, while the inner ring insert plate is adapted to the inner ring groove.

[0010] As a further aspect of the present invention: the cross-sections of both the outer and inner rings of the jacking pipe are C-shaped, and the diameter of the inner ring is smaller than that of the outer ring.

[0011] As a further aspect of the present invention: the outer ring insert plate is concentric with the circular ring plate and its circumference is shorter than the circumference of the outer edge of the circular ring plate; the inner ring insert plate is concentric with the circular ring plate and its circumference is shorter than the circumference of the inner edge of the circular ring plate.

[0012] As a further aspect of the present invention: the rotating block is C-shaped, and multiple pressure sensors are provided on the outer wall of the rotating block, and a grouting groove communicating with the interior is provided at the bottom of the inner wall of the rotating block.

[0013] As a further aspect of the present invention: a method for using a convenient maintenance-type downhole support excavation pipe jacking system, characterized by comprising the following steps:

[0014] Step 1: Connect one end of the outer ring of the jacking pipe to one end of the inner ring of the jacking pipe through the connecting mechanism. Insert the outer ring insert plate into the outer ring groove and the inner ring insert plate into the inner ring groove for fixation. Place the rotating block into the gap between the outer ring of the jacking pipe and the inner ring of the jacking pipe. Then connect the other end of the outer ring of the jacking pipe and the inner ring of the jacking pipe through the connecting mechanism.

[0015] Step 2: Rotate the rotating block to the side away from the outer and inner rings of the jacking pipe, forming a tubular structure between the rotating block and the outer and inner rings of the jacking pipe, which serves as the jacking pipe for well excavation operations;

[0016] Step 3: During the well excavation process, concrete is filled into the rotating block through the grouting groove to increase the stability of the rotating block;

[0017] Step 4: After the well is excavated, the rotating block is flipped into the outer and inner rings of the jacking pipe by adjusting the joints and grooves, thereby creating a reserved hole on the side of the jacking pipe, which facilitates lateral excavation operations through the reserved hole;

[0018] Step 5: When the stone wall deforms, the pressure sensor is triggered when the deformed stone wall presses against the outermost steel bar of the rotating block, and the maintenance personnel flip the corresponding rotating block over for maintenance.

[0019] The beneficial effects of this invention are:

[0020] 1. The rotating block of this invention has pre-reinforced steel bars inside before casting, which saves transportation costs and reduces the weight during transportation, thus reducing the burden on transportation equipment.

[0021] 2. The rotating block of the present invention can not only form a support frame for the mine tunnel by pouring concrete during implementation to provide protection, but also form reserved holes to facilitate subsequent lateral excavation.

[0022] 3. The rotating block of this invention consists of multiple parts. When the rock wall deforms, the pressure sensor can more accurately report the deformed part. When the staff arrives on site, they only need to flip the rotating block that is alarming to perform maintenance, which reduces maintenance costs. The staff only need to keep the sensor in normal working order and perform maintenance in a timely manner when the alarm is triggered. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the positional structure of the outer and inner rings of the jacking pipe in this invention;

[0026] Figure 3 This is a schematic diagram of the overall structure of the rotating block in this invention;

[0027] Figure 4 This is a schematic diagram of the connecting mechanism structure in this invention;

[0028] Figure 5 This is a schematic diagram of the connection structure between the connecting mechanism and the outer and inner rings of the jacking pipe in this invention;

[0029] Figure 6 This is a schematic diagram of the overall structure after the rotating block is installed in this invention.

[0030] In the diagram: 1. Outer ring of the jacking pipe; 11. Outer ring groove; 2. Inner ring of the jacking pipe; 21. Inner ring groove; 3. Connecting mechanism; 31. Outer ring insert plate; 32. Inner ring insert plate; 33. Circular ring plate; 4. Rotating block; 5. Groove; 6. Grouting groove; 7. Pressure sensor; 8. Adjusting joint. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1-6As shown, this is a convenient maintenance type of downhole support excavation jacking pipe, which includes: an outer ring 1, an outer ring groove 11, an inner ring 2, an inner ring groove 21, a connecting mechanism 3, an outer ring insert plate 31, an inner ring insert plate 32, a circular ring plate 33, a rotating block 4, a groove 5, a grouting groove 6, a pressure sensor 7, and an adjusting joint 8.

[0033] like Figure 2 As shown, the outer ring 1 of the jacking pipe has a C-shaped cross-section and is the outermost layer of the jacking pipe. A coaxial inner ring 2 is provided on the inner side of the outer ring 1, and outer ring grooves 11 are symmetrically provided on both sides of the outer ring 1. Figure 2 As shown, the inner ring 2 of the jacking pipe also has a C-shaped cross-section and is located inside the outer ring 1 of the jacking pipe. The diameter of the inner ring 2 is smaller than the diameter of the outer ring 1, and multiple sets of adjusting slots 8 are provided on the inner side of the inner ring 2. The multiple sets of adjusting slots 8 are evenly distributed between each other. Further details are as follows: Figure 2 As shown, inner ring grooves 21 are provided on both sides of the inner ring 2 of the jacking pipe, and the two sets of inner ring grooves 21 are symmetrically distributed.

[0034] Further as Figure 4 As shown, the connecting mechanism 3 includes an outer ring plate 31, an inner ring plate 32, and a circular ring plate 33. The outer ring plate 31 and the inner ring plate 32 are symmetrically arranged on both sides of the circular ring plate 33, and the inner ring plate 32 is arranged inside the outer ring plate 31. The outer ring plate 31 and the inner ring plate 32 are arranged with the same center. During installation, the connecting mechanism 3 is arranged between the outer ring 1 and the inner ring 2 of the jacking pipe.

[0035] Furthermore, the aforementioned annular plate 33 is annular in shape and serves as a partition between the two jacking pipes, made of concrete;

[0036] Further as Figure 4 As shown, the outer ring insert plate 31 is arc-shaped, and two outer ring insert plates 31 are symmetrically arranged on both sides of the annular plate 33. They are concentric with the annular plate 33 but their circumference is shorter than the circumference of the outer edge of the annular plate 33. They can be inserted into the outer ring groove 11 of the outer ring 1 of the jacking pipe. The inner ring insert plate 32 is also arc-shaped, and two inner ring insert plates 32 are symmetrically arranged on both sides of the annular plate 33. They are concentric with the annular plate 33 but their circumference is shorter than the circumference of the inner edge of the annular plate 33. They can be inserted into the inner ring groove 21 of the inner ring 2 of the jacking pipe. The connecting mechanism 3 is arranged between the two sides of the outer ring 1 and the inner ring 2 of the jacking pipe, and plays the role of fixing the outer ring 1 and the inner ring 2 of the jacking pipe.

[0037] like Figure 3As shown, when using the jacking pipe, the connecting mechanism 3 is inserted into the outer ring groove 11 and the inner ring groove 21, and then the rotating blocks 4 are installed in sequence. Multiple sets of rotating blocks 4 are installed between the outer ring 1 and the inner ring 2 of the jacking pipe, and the rotating blocks 4 are C-shaped with a thickness equal to the distance between the outer ring 1 and the inner ring 2 of the jacking pipe. The rotating blocks 4 are equipped with a steel mesh inside, but no concrete is poured. Multiple sets of pressure sensors 7 are installed in the inner wall of the rotating blocks 4 near the outer wall to detect whether the rotating blocks 4 are deformed. If the steel mesh of the rotating blocks 4 is deformed, an alarm will be triggered.

[0038] Further such as Figure 3 As shown, the inner wall of the rotating block 4 is provided with multiple grooves 5, and the multiple grooves 5 correspond to the adjustment joints 8. When maintenance is required, the steel pipe is inserted into the grooves 5 through the adjustment joints 8 to flip the rotating block 4. The front end is tunneled through the pipe jacking machine head. The pipe is laid behind the machine head. Therefore, the thickness of the outer wall of the pipe at the connection between the pipe and the flipped rotating block 4 (i.e., the thickness at the opening of the outer ring 1 and the inner ring 2 of the pipe) does not affect the use of the pipe.

[0039] Furthermore, the bottom of the inner wall of the aforementioned rotating block 4 is provided with a grouting groove 6 that connects to the interior. During the well excavation process, the interior of the rotating block 4 is poured, and the strength is enhanced in conjunction with the internal steel mesh.

[0040] Working principle:

[0041] The outer ring 1, inner ring 2, connecting mechanism 3, and rotating block 4 of the jacking pipe are arranged according to... Figure 6 As shown in the diagram, when using the device, flip the C-shaped rotating block 4 to the side away from the outer ring 1 and inner ring 2 of the jacking pipe (e.g., Figure 1 As shown), the rotating block 4, together with the outer ring 1 and the inner ring 2 of the jacking pipe, forms a circular tube shape, which can be used for well excavation. During the well excavation process, external grouting equipment is used to fill concrete into the rotating block 4 through the grouting groove 6.

[0042] After the well is excavated, the corresponding rotating block 4 is flipped into the outer ring 1 and the inner ring 2 of the jacking pipe, so that a reserved hole is generated in the jacking pipe at the side position, and the lateral excavation operation can be carried out through the reserved hole.

[0043] When the stone wall deforms, the pressure sensor 7 will be triggered when the deformed stone wall squeezes the outermost steel bar of the rotating block 4. Maintenance personnel only need to flip the corresponding rotating block 4 over for maintenance, which is simple, quick and safe.

[0044] Furthermore, the present invention also includes a method for using a maintenance-friendly downhole support excavation pipe, comprising the following steps:

[0045] Step 1: First, connect one end of the outer ring 1 and the inner ring 2 of the jacking pipe through the connecting mechanism 3. Insert the outer ring insert plate 31 into the outer ring groove 11 and the inner ring insert plate 32 into the inner ring groove 21 for fixation. Place the rotating block 4 into the gap between the outer ring 1 and the inner ring 2 of the jacking pipe. Then connect the other end of the outer ring 1 and the inner ring 2 of the jacking pipe through the connecting mechanism 3.

[0046] Step 2: Rotate the rotating block 4 to a side away from the outer ring 1 and the inner ring 2 of the jacking pipe. The rotating block 4 forms a tubular shape with the outer ring 1 and the inner ring 2 of the jacking pipe, which serves as the jacking pipe for well excavation.

[0047] Step 3: During the well excavation process, concrete is filled into the rotating block 4 through the grouting groove 6 to increase the stability of the rotating block 4;

[0048] Step 4: After the well is excavated, the rotating block 4 is flipped into the outer ring 1 and inner ring 2 of the jacking pipe by adjusting the joint 8 and the groove 5, thereby creating a reserved hole on the side of the jacking pipe. Lateral excavation can be carried out through the reserved hole.

[0049] Step 5: When the stone wall deforms, the pressure sensor 7 is triggered when the deformed stone wall presses against the outermost steel bar of the rotating block 4. Maintenance personnel only need to flip the corresponding rotating block 4 over for maintenance.

[0050] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A convenient maintenance type of downhole support excavation pipe, characterized in that, It includes an outer ring (1) and an inner ring (2) of the jacking pipe. The inner ring (2) is located inside the outer ring (1) and is coaxially arranged. The outer ring (1) is symmetrically provided with outer ring grooves (11) at both ends. The inner ring (2) is symmetrically provided with inner ring grooves (21) at both ends. Multiple sets of adjustment seams (8) are provided inside the inner ring (2). The outer ring (1) and the inner ring (2) are provided with connecting mechanisms (3) at both ends. Multiple sets of rotating blocks (4) are installed between the outer ring (1) and the inner ring (2). The inner wall surface of the rotating block (4) is provided with multiple grooves (5) and is corresponding to the adjustment seams (8). The connecting mechanism (3) includes a ring plate (33), on which an outer ring plate (31) and an inner ring plate (32) are symmetrically arranged on both sides. The inner ring plate (32) is located inside the outer ring plate (31). The outer ring plate (31) is adapted to the outer ring groove (11), and the inner ring plate (32) is adapted to the inner ring groove (21). Both the outer ring (1) and the inner ring (2) of the jacking pipe have C-shaped cross sections, and the diameter of the inner ring (2) is smaller than the diameter of the outer ring (1). The outer ring plate (31) is concentric with the ring plate (33) and its circumference is shorter than the outer edge circumference of the ring plate (33); the inner ring plate (32) is concentric with the ring plate (33) and its circumference is shorter than the inner edge circumference of the ring plate (33). The rotating block (4) is C-shaped. Multiple pressure sensors (7) are provided on the outer wall of the rotating block (4). A grouting groove (6) that connects to the interior is provided at the bottom of the inner wall of the rotating block (4).

2. A method for using the convenient maintenance downhole support excavation pipe jacking system according to claim 1, characterized in that, Includes the following steps: Step 1: Connect one end of the outer ring (1) of the jacking pipe and one end of the inner ring (2) of the jacking pipe through the connecting mechanism (3), insert the outer ring insert plate (31) into the outer ring groove (11), insert the inner ring insert plate (32) into the inner ring groove (21) for fixing, put the rotating block (4) into the gap between the outer ring (1) of the jacking pipe and the inner ring (2) of the jacking pipe, and then connect the other end of the outer ring (1) of the jacking pipe and the inner ring (2) of the jacking pipe through the connecting mechanism (3); Step 2: Rotate the rotating block (4) to the side away from the outer ring (1) and inner ring (2) of the jacking pipe. The rotating block (4) forms a tubular shape with the outer ring (1) and inner ring (2) of the jacking pipe, which is used as the jacking pipe for well excavation. Step 3: During the excavation process, concrete is filled into the rotating block (4) through the grouting groove (6) to increase the stability of the rotating block (4); Step 4: After the well is excavated, the rotating block (4) is flipped into the outer ring (1) and inner ring (2) of the jacking pipe by adjusting the joint (8) and the groove (5), thereby creating a reserved hole on the side of the jacking pipe, which facilitates lateral excavation through the reserved hole; Step 5: When the stone wall deforms, the pressure sensor (7) is triggered when the deformed stone wall presses against the outermost steel bar of the rotating block (4). The maintenance personnel then flip the corresponding rotating block (4) over for maintenance.

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