Power pipe jacking haafing positioning installation process

Abstract

The present application relates to electric power pipe jacking technical field, disclose electric power pipe jacking haifen groove positioning installation process, comprising the following steps: S1, according to the position of the groove on the inner formwork, mark the two end position of the groove on the inner formwork;S2, according to the position of the groove on the steel reinforcement cage, the haifen groove is initially bound with fine iron wire on the positioning rib of the steel reinforcement cage;S3, make the two end of haifen groove coincide with the pre-mark, then use the fixed device to tightly adhere to the inner formwork, and then use the electric welding machine to firmly weld the haifen groove and the steel reinforcement cage;S4, after installing the outer formwork, pouring concrete, and vibrating, curing.The present application can realize accurate positioning of haifen groove, and the operation of the fixing device is convenient and simple, and a single person can complete it, the pull rod assembly in the fixing device can adjust the length, so that it hooks the steel reinforcement cage reinforcement, and can be stored, convenient to wear into the steel reinforcement cage, to adapt to different specifications of the steel reinforcement cage, has strong practicability.

Description

Technical Field

[0001] This invention relates to the field of power pipe jacking technology, specifically the positioning and installation process of power pipe jacking trenches. Background Technology

[0002] With the rapid development of urban construction and the expansion of urban planning, the functions of cities are constantly being improved. This leads to increased production and the upgrading of living facilities, resulting in a growing demand for urban electricity and power grids. Traditional methods of laying cables, such as direct burial, pipe laying, and cable trenches, are insufficient to meet the needs of power development. Power cable tunnels are inevitably evolving towards higher voltage and larger cross-sections. Furthermore, the traditional overhead power cable layout, resembling a spider web, is numerous and severely impacts the aesthetics of the city. Moreover, natural or human factors can damage these overhead cables, creating electrical safety hazards. For these reasons, the advantages of underground power grid laying have become apparent, and it is widely used in urban power grid expansion projects. Underground power grid laying requires the use of underground power pipelines.

[0003] Underground power duct networks mainly take several forms, including segmented pipes, rectangular pipe galleries, and DRCP (Dual-channel jacking pipe). Among them, DRCP is widely used due to its superior advantages. DRCP is installed by pipe jacking. DRCP includes pre-embedded steel plate rings, pre-embedded perforated annular steel plates on the end face, pre-embedded positioning calipers and nuts, and pre-embedded H-channels. Due to the good overall stress effect, strong dynamic load capacity, stability, and maintenance-free operation of the pre-embedded H-channels, as well as their convenient installation of electrical systems and their ability to be adjusted circumferentially without damaging the tunnel lining, they are widely used in power jacking.

[0004] Chinese patent discloses an auxiliary installation device for a H-shaped pre-embedded groove (authorization announcement number CN214942562U). This patented technology places the auxiliary installation device at the bottom of the H-shaped pre-embedded groove and indirectly adjusts the overall height of the auxiliary installation device by adjusting the extension length of the telescopic rod, so that the top surface elevation of the groove is consistent with its design elevation. After the H-shaped pre-embedded groove is reinforced, the telescopic rod is adjusted to retract and it is moved to the installation position of the next H-shaped pre-embedded groove for repeated use. However, when positioning the H-shaped pre-embedded groove, it cannot be fixed by itself and the H-shaped pre-embedded groove needs to be welded to the reinforcing cage first, which makes adjustment inconvenient and positioning difficult. Summary of the Invention

[0005] The purpose of this invention is to provide a power jacking pipe positioning and installation process for H-channels to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The installation process for power jacking pipes in a duct includes the following steps:

[0008] S1. Calculate the circumferential and longitudinal positions of the channel on the inner template according to the design drawings, and draw lines on the inner template. Then, drill positioning holes at the two ends of the channel on the inner template. Finally, draw a cross mark at the two ends of the channel.

[0009] S2. Measure the position of the channel on the steel cage according to the calculated longitudinal and circumferential distances, and select a longitudinal steel bar inside the steel cage at this position as a positioning bar. Then, use thin iron wire to initially tie the duct to the positioning bar.

[0010] S3. Hoist the reinforcing cage and place it on the outside of the inner formwork. When placing the reinforcing cage onto the inner formwork, slowly move the cage so that the two ends of the H-shaped channel coincide with the center of the pre-marked "+" mark. Then, use the fixing device to firmly attach the H-shaped channel to the inner formwork and check whether the positioning deviation of the H-shaped channel meets the requirements. If the positioning deviation of the H-shaped channel meets the requirements, tighten the fixing device. If the positioning deviation of the H-shaped channel does not meet the requirements, make a fine adjustment to the position of the H-shaped channel and then tighten the fixing device. Finally, use an electric welding machine to firmly weld the H-shaped channel and the reinforcing cage together.

[0011] S4. Fill the inside of the H-shaped channel with foam filler to prevent concrete from entering the C-shaped channel. After installing the outer formwork, pour the concrete, vibrate and cure it.

[0012] As a further aspect of the present invention: in step S3, the positioning deviation requirements for the Häfen groove are as follows: the elevation deviation is not greater than 10.0 mm, the front-to-back deviation between the axis and the inner template is not greater than 10.0 mm, and the left-to-right deviation is not greater than 20.0 mm.

[0013] As a further embodiment of the present invention: in step S3, the fixing device includes a long screw, one end of which is fixedly connected to a fixing block, and the other end of which is fixedly connected to a top rod. A nut pair is engaged with the outer side of the long screw, and a set of fixing ears is fixedly connected to the upper and lower ends of the outer side of the nut pair. A pull rod assembly is provided on the inner side of each fixing ear, and a fastening bolt is installed between the pull rod assembly and the nut pair.

[0014] As a further embodiment of the present invention: a washer is rotatably connected to one end of the top rod, and a set of lever rods are fixedly connected to the front and rear ends of the outer side of the fixing block, wherein a handle is fixedly connected to one end of one of the lever rods.

[0015] As a further embodiment of the present invention: the pull rod assembly includes an outer pull rod and an inner pull rod embedded inside the outer pull rod. The bottom end of the outer pull rod is provided with a trunnion, and a button shell is fixedly connected to the upper side of one end of the outer pull rod. A pull hook is fixedly connected to the upper side of one end of the inner pull rod, and a plurality of locking holes are evenly opened in the vertical direction on the inner side of the inner pull rod.

[0016] As a further embodiment of the present invention: a movable block is provided on the inner side of the button shell, and a rotating shaft is rotatably connected between the button shell and the movable block. A reset spring and a button are respectively provided on the left and right sides of the lower end of the movable block, and a locking post is fixedly connected to one side of the upper end of the movable block.

[0017] As a further embodiment of the present invention: a through hole is provided at the lower end of the outer side of the button shell, the button passes through the inner side of the through hole, and the locking post matches the locking hole.

[0018] As a further embodiment of the present invention: the trunnion is located inside the fixed ear, and the trunnion and the fixed ear are fixedly connected by fastening bolts.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention first marks the end position of the channel on the inner template; then, the H-channel is initially fixed to the corresponding position on the reinforcing cage; next, the reinforcing cage is hoisted to the corresponding position on the inner template, and the H-channel is fixed with a fixing device. This can achieve accurate positioning of the H-channel, and the fixing device is easy and simple to operate, and can be completed by a single person. The tie rod component in the fixing device can be adjusted in length to hook onto the reinforcing cage reinforcement, and can also be stored for easy insertion into the reinforcing cage to adapt to different specifications of reinforcing cages, thus having strong practicality. Attached Figure Description

[0021] Figure 1 A schematic diagram of the installation structure for the positioning and installation process of power jacking pipes in a ferrule;

[0022] Figure 2 A schematic diagram of the fixing device in the positioning and installation process of power jacking pipes in a ferrule;

[0023] Figure 3 A schematic diagram of the tie rod assembly used in the positioning and installation process of power jacking pipes in a ferrule trench.

[0024] Figure 4 A cross-sectional structural diagram of the button housing in the positioning and installation process of the power jacking pipe in the H-shaped trench.

[0025] In the diagram: 1. Long screw; 2. Nut pair; 3. Fixing lug; 4. Washer; 5. Top rod; 6. Fastening bolt; 7. Tie rod assembly; 71. Outer tie rod; 72. Button housing; 73. Inner tie rod; 74. Hook; 75. Locking hole; 76. Trunnion; 77. Button; 78. Moving block; 79. Rotating shaft; 710. Return spring; 711. Locking post; 8. Support rod; 9. Fixing block; 10. Handle; 11. Reinforcing cage reinforcement; 12. Positioning rib; 13. H-channel; 14. Inner formwork. Detailed Implementation

[0026] Please see Figures 1-4 In this embodiment of the invention, the positioning and installation process of the power jacking pipe in a ferrule includes the following steps:

[0027] S1. Calculate the circumferential and longitudinal positions of the channel of the H-channel 13 on the inner template 14 according to the design drawings, draw lines on the inner template 14, drill positioning holes at the two ends of the channel on the inner template 14, and then draw "+" marks at the two ends of the channel.

[0028] S2. Measure the position of the channel on the steel cage according to the calculated longitudinal and circumferential distances, and select a longitudinal steel bar inside the steel cage at this position as the positioning bar 12. Then, use thin iron wire to initially tie the hamlet channel 13 to the positioning bar 12.

[0029] S3. Hoist the reinforcing cage and place it on the outside of the inner formwork 14. When placing the reinforcing cage onto the inner formwork 14, slowly move the cage so that the two ends of the H-channel 13 coincide with the center of the pre-marked "+" mark. Then, use the fixing device to firmly attach the H-channel 13 to the inner formwork 14 and check whether the positioning deviation of the H-channel 13 meets the requirements. If the positioning deviation of the H-channel 13 meets the requirements, tighten the fixing device. If the positioning deviation of the H-channel 13 does not meet the requirements, make a fine adjustment to the position of the H-channel 13 and then tighten the fixing device. Then, use an electric welding machine to firmly weld the H-channel 13 to the reinforcing cage.

[0030] S4. Fill the inside of the Huff trough 13 with foam filler to prevent concrete from entering the C-shaped trough. After installing the outer formwork, pour the concrete, vibrate and cure it.

[0031] Preferably, in step S3, the positioning deviation requirements for the Huffing groove 13 are as follows: the elevation deviation is not greater than 10.0 mm, the front-to-back deviation of the axis from the inner template 14 is not greater than 10.0 mm, and the left-to-right deviation is not greater than 20.0 mm.

[0032] Preferably, in step S3, the fixing device includes a long screw 1, one end of which is fixedly connected to a fixing block 9, and the other end of which is fixedly connected to a top rod 5. A nut pair 2 is engaged with the outer side of the long screw 1. A set of fixing ears 3 are fixedly connected to the upper and lower ends of the outer side of the nut pair 2. A pull rod assembly 7 is provided on the inner side of each fixing ear 3. A fastening bolt 6 is installed between the pull rod assembly 7 and the nut pair 2. A washer 4 is rotatably connected to one end of the top rod 5. A set of lever rods 8 are fixedly connected to the front and rear ends of the outer side of the fixing block 9, and a handle 10 is fixedly connected to one end of one lever rod 8. Figure 2 As shown; the gasket 4 is pressed against the hamlet groove 13, and the corresponding steel cage reinforcement 11 is hooked by the tie rod assembly 7. Then, the handle 10 or the lever 8 is held by hand and the lever 8 is rotated. The long screw 1 is driven to rotate together through the fixing block 9, so that the long screw 1 rotates inside the nut pair 2. Then, the top rod 5 squeezes the gasket 4, so that the hamlet groove 13 is tightly attached to the inner template 14 and remains stable with the inner template 14.

[0033] Preferably, the pull rod assembly 7 includes an outer pull rod 71 and an inner pull rod 73 embedded inside the outer pull rod 71. A trunnion 76 is provided at the bottom end of the outer pull rod 71. A button housing 72 is fixedly connected to the upper side of one end of the outer pull rod 71. A hook 74 is fixedly connected to the upper side of one end of the inner pull rod 73. A plurality of locking holes 75 are evenly distributed vertically on the inner side of the inner pull rod 73. Figure 3 As shown.

[0034] Preferably, a movable block 78 is provided on the inner side of the button housing 72, and a rotating shaft 79 is rotatably connected between the button housing 72 and the movable block 78. A return spring 710 and a button 77 are respectively provided on the left and right sides of the lower end of the movable block 78. A retaining post 711 is fixedly connected to one side of the upper end of the movable block 78. A through hole is opened at the lower outer side of the button housing 72, and the button 77 passes through the inner side of the through hole. The retaining post 711 matches the retaining hole 75. Figure 3 and Figure 4 As shown; when button 77 is pressed by hand, the return spring 710 is deformed by pressure, and the movable block 78 rotates clockwise around the pivot 79. The locking pin 711 disengages from the corresponding locking hole 75. At this time, the inner pull rod 73 can be pulled from the inside of the outer pull rod 71 to adjust the relative length of the outer pull rod 71 and the inner pull rod 73 so that the hook 74 can hook the corresponding steel cage reinforcement 11. Then, when button 77 is released, the return spring 710 automatically resets, and the movable block 78 rotates counterclockwise around the pivot 79. The locking pin 711 re-enters the corresponding locking hole 75, keeping the outer pull rod 71 and the inner pull rod 73 fixed. Figure 1 As shown.

[0035] The trunnion 76 is located inside the fixed ear 3, and the trunnion 76 and the fixed ear 3 are fixedly connected by the fastening bolt 6, such as Figure 2 and Figure 3 As shown; after loosening the fastening bolt 6 counterclockwise, the tie rod assembly 7 can be rotated along the fixing ear 3 to store the tie rod assembly 7, so that the tie rod assembly 7 can be easily inserted into the steel cage. When the tie rod assembly 7 reaches the set position, the tie rod assembly 7 is reset and then the fastening bolt 6 is tightened to keep the tie rod assembly 7 fixed to the fixing ear 3.

[0036] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. The power jacking pipe positioning and installation process in a jacking trench is characterized by, Includes the following steps: S1. Calculate the circumferential and longitudinal positions of the channel of the Huffen channel (13) on the inner template (14) according to the design drawings, draw lines on the inner template (14), drill positioning holes at the two ends of the channel on the inner template (14), and then draw "+" marks at the two ends of the channel. S2. Measure the position of the channel on the steel cage according to the calculated longitudinal and circumferential distances, and select a longitudinal steel bar inside the steel cage at this position as a positioning bar (12). Then, tie the hamfen channel (13) to the positioning bar (12) with thin iron wire. S3. Hoist the steel cage and place it on the outside of the inner formwork (14). When placing the steel cage on the inner formwork (14), slowly move the steel cage so that the two ends of the H-channel (13) coincide with the center of the pre-marked "+" mark. Then use the fixing device to press the H-channel (13) tightly against the inner formwork (14) and check whether the positioning deviation of the H-channel (13) meets the requirements. When the positioning deviation of the H-channel (13) meets the requirements, tighten the fixing device. When the positioning deviation of the H-channel (13) does not meet the requirements, make a fine adjustment to the position of the H-channel (13) and tighten the fixing device. Then use an electric welding machine to firmly weld the H-channel (13) and the steel cage together. S4. Use foam filler to fill the inside of the Huffen trough (13) to prevent concrete from entering the C-shaped trough. After installing the outer formwork, pour concrete, vibrate and cure it. In step S3, the fixing device includes a long screw (1), one end of which is fixedly connected to a fixing block (9), and the other end of which is fixedly connected to a top rod (5). A nut pair (2) is engaged with the outer side of the long screw (1), and a set of fixing ears (3) is fixedly connected to the upper and lower ends of the outer side of the nut pair (2). A pull rod assembly (7) is provided on the inner side of each fixing ear (3), and a fastening bolt (6) is installed between the pull rod assembly (7) and the nut pair (2). A washer (4) is rotatably connected to one end of the top rod (5), and a set of lever rods (8) are fixedly connected to the front and rear ends of the outer side of the fixing block (9). A handle (10) is fixedly connected to one end of one of the lever rods (8). The pull rod assembly (7) includes an outer pull rod (71) and an inner pull rod (73) embedded inside the outer pull rod (71). The bottom end of the outer pull rod (71) is provided with a trunnion (76), and a button housing (72) is fixedly connected to the upper side of one end of the outer pull rod (71). A hook (74) is fixedly connected to the upper side of one end of the inner pull rod (73), and several locking holes (75) are evenly distributed vertically on the inner side of the inner pull rod (73). A movable block (78) is provided inside the button housing (72), and the button housing (72) and the movable block (78) are connected... A rotating shaft (79) is rotatably connected between the movable block (78). A reset spring (710) and a button (77) are respectively provided on the left and right sides of the lower end of the movable block (78). A locking post (711) is fixedly connected to one side of the upper end of the movable block (78). A through hole is opened at the lower end of the outer side of the button shell (72). The button (77) passes through the inner side of the through hole. The locking post (711) matches the locking hole (75). The trunnion (76) is located inside the fixed ear (3), and the trunnion (76) and the fixed ear (3) are fixedly connected by a fastening bolt (6).

2. The power jacking pipe positioning and installation process according to claim 1, characterized in that, In step S3, the positioning deviation requirements for the HAFF groove (13) are as follows: the elevation deviation is not greater than 10.0 mm, the front-to-back deviation of the axis and the inner template (14) is not greater than 10.0 mm, and the left-to-right deviation is not greater than 20.0 mm.

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