Pipe jacking for trenchless pipeline construction

Abstract

This invention relates to the field of engineering construction technology, specifically to a trenchless pipeline construction method using pipe jacking. The method includes a pipe jacking body with a sealing and lifting assembly inside. A tunneling machine is installed at the front end of the pipe jacking body. By adjusting the displacement of the sealing transition pipe, the installation cavity on the pipe jacking body can be sealed, resulting in a better sealing effect at the front end of the pipe jacking body and improved performance. The sealing and lifting assembly ensures good positioning between the sealing transition pipe and the pipe jacking body. Furthermore, the sealing and lifting assembly uses the same adjusting screw to simultaneously adjust the first and second transition seats, enabling high stability and convenience in the positioning of the sealing transition pipe by the adjusting limit plate. This improves the installation and disassembly positioning of the tunneling machine, significantly reduces labor costs, and ultimately enhances the performance of the pipe jacking body during construction.

Description

Technical Field

[0001] This invention relates to the field of engineering construction technology, specifically to a trenchless pipeline construction method using pipe jacking. Background Technology

[0002] During construction, pipe jacking is carried out first, followed by open excavation. During open excavation, the soil around the caisson at the connection point is excavated to a depth of 3m above the open excavation water level to ensure that the caisson does not tilt.

[0003] In this engineering construction, a slurry-balanced pipe jacking machine was used. The machine's main structure is a hingeless design, serving both to connect the two ends of the machine head and to correct deviation. The front end of the machine head is equipped with a cutterhead, mud chamber, breast plate, head tilt sensor, gearbox, motor, hydraulic control cabinet, and operating platform, all housed in the pipe section behind the machine head. The machine's construction features include: the excavation device at the front end of the machine head consists of an automatically retractable full-section cutterhead and a follow-up cutterhead. During excavation, after pre-adjusting the cutterhead thrust, the cutterhead moves back and forth according to soil changes. The cutterhead and cutter clamps work together to automatically adjust the cutting aperture size, maintaining a constant predetermined thrust and achieving automatic balance of the soil pressure at the front. The front of the machine head has a mud chamber sealed and isolated from the power unit; adjusting the mud pressure within the mud chamber balances the groundwater. However, existing tunneling machines have low ease of connection and disassembly with the front-end pipe, and the sealing effect of the connection between the tunneling machine and the front-end pipe is poor. Therefore, a trenchless pipe jacking method is needed to improve upon these issues. Summary of the Invention

[0004] To address the issues of low ease of connection and disassembly between the tunneling machine and the front-end jacking pipe, and poor sealing effect of the connection between the tunneling machine and the front-end jacking pipe, which affects construction efficiency, this invention provides a trenchless pipeline construction jacking pipe to solve the above problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A trenchless pipeline construction method includes a jacking body, a sealing and lifting assembly is provided inside the jacking body, and a tunneling machine is installed at the front end of the jacking body.

[0007] An installation cavity is provided on the front side wall of the jacking pipe body. A limit groove is provided on the front inner side wall of the jacking pipe body corresponding to the installation cavity. A sealing adapter pipe is installed on the jacking pipe body through the installation cavity. A positioning groove is provided on the front side wall of the sealing adapter pipe. A limit block is provided in a ring shape on the outer wall of the sealing adapter pipe and inside the positioning groove. A positioning stop is provided on the front end of the inner wall of the jacking pipe body corresponding to the limit block. A transition post is provided on both sides of the outer end of the positioning stop on the front inner wall of the jacking pipe body. An adjustment groove is provided on the inner side wall of the sealing adapter pipe.

[0008] The sealing lifting assembly includes a positioning tube, inside which is an adjusting screw. Both ends of the adjusting screw are rotatably connected to the positioning tube via positioning bearings. The middle of the adjusting screw is rotatably connected to the positioning tube via a positioning sleeve. A symmetrical annular limit groove is formed on the side wall of the positioning tube. Two sets of limit grooves are correspondingly arranged before and after the positioning sleeve. A first adapter seat is provided on the adjusting screw behind the positioning sleeve, and a second adapter seat is provided on the adjusting screw in front of the positioning sleeve. A first positioning support rod is rotatably mounted on the first adapter seat, and a second positioning support rod is rotatably mounted on the second adapter seat. An adjusting limit plate is rotatably mounted on the other end of both the first and second positioning support rods.

[0009] As a preferred embodiment of the present invention, the sealing adapter is adapted to the mounting cavity, and the length of the sealing adapter is three-quarters of the opening depth of the mounting cavity.

[0010] As a preferred embodiment of the present invention, the positioning block extends through the inner wall of the jacking pipe body into the interior of the mounting cavity and is correspondingly arranged with the limiting block.

[0011] As a preferred embodiment of the present invention, the tunneling machine is installed and connected to the jacking pipe body through a sealed transfer pipe.

[0012] As a preferred embodiment of the present invention, the regulating groove adopts a blind hole groove structure, the regulating limiting plate and the regulating groove are correspondingly adapted to each other, and the side cross-section of the regulating limiting plate is a "right trapezoidal" structure.

[0013] As a preferred embodiment of the present invention, one end of the positioning block is connected to the adapter post by fixing nuts on both sides.

[0014] As a preferred embodiment of the present invention, the sealing adapter pipe is positioned and adjustable through a regulating limit plate and a regulating slide groove to slide with the jacking pipe body.

[0015] As a preferred embodiment of the present invention, the first adapter seat and the second adapter seat are slidably connected to the adjacent limiting groove.

[0016] As a preferred embodiment of the present invention, the regulating screw is provided with a reverse thread groove structure with the front and rear threads centered on the positioning bushing.

[0017] As a preferred embodiment of the present invention, the two ends of the first positioning support rod and the second positioning support rod are provided with a "U"-shaped groove structure.

[0018] Compared with existing technologies:

[0019] 1. In trenchless pipeline construction, this invention, through displacement control of the sealing transfer pipe, enables the sealing of the installation cavity on the main body of the jacking pipe. This provides a better sealing effect for the foremost part of the jacking pipe, resulting in improved performance of the jacking pipe and effectively preventing mud from entering the installation cavity. This also improves the performance of the tunneling machine during reinstallation. The positioning block engages with the limiting block, ensuring a good connection between the sealing transfer pipe and the installation cavity. Furthermore, by disassembling the positioning baffle, the sealing lifting assembly can better control the displacement of the sealing transfer pipe, making disassembly and positioning of the tunneling machine convenient and effectively sealing the installation cavity, thus further enhancing the performance of the jacking pipe.

[0020] 2. In trenchless pipeline construction, the present invention enables a good transition positioning effect between the sealing transfer pipe and the main body of the jacking pipe through the sealing lifting assembly. Furthermore, the sealing lifting assembly uses the same adjusting screw to simultaneously adjust the first and second transfer seats, which enables the adjusting limit plate to adjust and position the sealing transfer pipe with high stability and convenience. This results in better installation and disassembly positioning of the tunneling machine, and can significantly reduce labor, thereby improving the performance of the jacking pipe body during construction.

[0021] 3. In trenchless pipeline construction, this invention utilizes a matching and adjustable limiting plate and a regulating chute in the trenchless pipe jacking process. The adjustable limiting plate has a right-angled trapezoidal cross-section, which enhances the stability and convenience of the installation and positioning of the sealing adapter pipe and the main body of the jacking pipe. Furthermore, the opposite threads at both ends of the adjusting screw allow for better positioning and control of the first and second adapter seats. This, in turn, enables the first and second positioning supports to better support and control the adjusting limiting plate, resulting in a superior control effect for the sealing adapter pipe. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the sealing adapter tube ejection structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the sealing adapter pipe after adjustment according to the present invention;

[0025] Figure 4 This is a schematic diagram of the jacking pipe structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the sealing adapter structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the sealing adapter section of the present invention;

[0028] Figure 7 This is a schematic diagram of the sealing and lifting assembly structure of the present invention;

[0029] Figure 8 This is a partial structural diagram of the sealing and lifting assembly of the present invention;

[0030] Figure 9 This is a partial structural diagram of the sealing and lifting assembly of the present invention.

[0031] In the diagram: 1. Pipe jacking body; 101. Installation cavity; 102. Limiting groove; 103. Sealing adapter pipe; 104. Positioning groove; 105. Limiting block; 106. Positioning stop block; 107. Adapter column; 108. Adjustment slide; 2. Sealing jacking assembly; 201. Positioning pipe; 202. Adjustment screw; 203. Positioning bearing; 204. Positioning bushing; 205. Limiting slide; 206. First adapter seat; 207. Second adapter seat; 208. First positioning support rod; 209. Second positioning support rod; 210. Adjustment limiting plate; 3. Tunneling machine. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] Example: Please refer to Figure 1-9 The pipeline trenchless construction pipe jacking shown includes a pipe jacking body 1, a sealing and lifting assembly 2 is installed inside the pipe jacking body 1, and a tunneling machine 3 is installed at the front end of the pipe jacking body 1.

[0034] In this embodiment, specific references are made. Figure 1-7As shown, an installation cavity 101 is provided on the front side wall of the jacking pipe body 1. A limiting groove 102 is provided on the inner side wall of the front end of the jacking pipe body 1, corresponding to the installation cavity 101. A sealing adapter pipe 103 is installed on the jacking pipe body 1 through the installation cavity 101. A positioning groove 104 is provided on the front side wall of the sealing adapter pipe 103. A limiting block 105 is provided in a ring shape on the outer wall of the sealing adapter pipe 103 and inside the positioning groove 104. A positioning stop 106 is provided on the front end of the inner wall of the jacking pipe body 1, corresponding to the limiting block 105. A transition post 1 is provided on both sides of the outer end of the positioning stop 106 on the inner wall of the front end of the jacking pipe body 1. 07. An adjustment groove 108 is provided on the inner wall of the sealing transition pipe 103. The tunneling machine 3 is installed and connected to the jacking body 1 through the sealing transition pipe 103. After the sealing lifting component 2 positions and adjusts the sealing transition pipe 103, the positioning block 106 is installed and positioned through the transition column 107. The positioning block 106 engages with the limiting block 105 after it has been moved to the designated position. This allows the interior of the installation cavity 101 to better limit the installation of the tunneling machine 3, resulting in a better installation and positioning effect for the tunneling machine 3. Furthermore, under the action of the sealing lifting component 2, the tunneling machine 3 can be better positioned and disassembled.

[0035] The sealing adapter pipe 103 is adapted to the installation cavity 101. The length of the sealing adapter pipe 103 is three-quarters of the opening depth of the installation cavity 101. The positioning block 106 extends through the inner wall of the jacking pipe body 1 into the interior of the installation cavity 101 and is correspondingly set with the limiting block 105. One end of the positioning block 106 is connected to the adapter column 107 with fixing nuts on both sides. By setting the length of the sealing adapter pipe 103 to be shorter than the depth of the installation cavity 101, the sealing adapter pipe 103 can be better adjusted for connection, thereby making the installation and jacking of the tunneling machine 3 more convenient. The positioning block 106 can better position and install the sealing adapter pipe 103.

[0036] In this embodiment, specific references are made. Figure 2 , 4As shown in Figures 5, 6, 7, 8, and 9, the sealing lifting assembly 2 includes a positioning tube 201. An adjusting screw 202 is installed inside the positioning tube 201. Both ends of the adjusting screw 202 are rotatably connected to the positioning tube 201 via positioning bearings 203. The middle of the adjusting screw 202 is rotatably connected to the positioning tube 201 via a positioning bushing 204. A symmetrically arranged limit groove 205 is formed on the side wall of the positioning tube 201, with the limit groove 205 corresponding to the front and rear of the positioning bushing 204. There are two sets of components: a first adapter seat 206 is located on the adjusting screw 202 and behind the positioning sleeve 204; a second adapter seat 207 is located on the adjusting screw 202 and in front of the positioning sleeve 204. A first positioning support rod 208 is rotatably mounted on the first adapter seat 206, and a second positioning support rod 209 is rotatably mounted on the second adapter seat 207. An adjusting limit plate 210 is rotatably mounted at the other end of the first and second positioning support rods 208 and 209. The sealing lifting assembly 2 ensures good positioning between the sealing adapter pipe 103 and the jacking pipe body 1. Furthermore, the sealing lifting assembly 2 uses the same adjusting screw 202 to simultaneously adjust the first adapter seat 206 and the second adapter seat 207, resulting in high stability and convenience of the adjusting limit plate 210 in positioning the sealing adapter pipe 103. This improves the installation and disassembly positioning of the tunneling machine 3, significantly reduces labor costs, and enhances the performance of the jacking pipe body 1 during construction.

[0037] The regulating chute 108 adopts a blind hole groove structure. The regulating limit plate 210 is correspondingly matched with the regulating chute 108. The side cross-section of the regulating limit plate 210 is a "right trapezoid" structure. The sealing adapter pipe 103 is slidably connected to the jacking pipe body 1 through the regulating limit plate 210, the regulating chute 108, and the first adapter seat 206 and the second adapter seat 207 are slidably connected to the adjacent limiting chute 205. The regulating screw 202 is set with opposite thread groove structure based on the positioning bushing 204 as the center. The two ends of the first positioning support rod 208 and the second positioning support rod 209 are set with "U" shaped groove structure. By adjusting the corresponding and compatible arrangement between the limiting plate 210 and the adjusting slide 108, and by setting the side cross-section of the limiting plate 210 to a "right-angled trapezoidal" structure, the installation, adjustment, and positioning stability between the sealing adapter pipe 103 and the jacking pipe body 1 is high and convenient. By setting the threads at both ends of the adjusting screw 202 to be opposite, the adjusting screw 202 can better adjust the positioning of the first adapter seat 206 and the second adapter seat 207, thereby enabling the first positioning support rod 208 and the second positioning support rod 209 to better support and adjust the limiting plate 210, resulting in a good adjustment and use effect of the sealing adapter pipe 103.

[0038] During the trenchless pipeline construction of this scheme, the control screw 202 is rotated to control the first adapter 206 and the second adapter 207 to move in opposite directions or in opposite directions in the limiting groove 205 on the positioning pipe 201. This causes the angle between the first positioning support rod 208 and the second positioning support rod 209 and the positioning pipe 201 to change, so that the control limiting plate 210 pushes and limits the sealing adapter pipe 103. This makes the control and positioning of the sealing adapter pipe 103 very convenient, and makes the installation, limiting, pushing and disassembling of the tunneling machine 3 simple and convenient.

[0039] By rotating the regulating screw 202, the regulating screw 202 controls the first adapter 206 and the second adapter 207 to move in opposite directions or in opposite directions in the limiting groove 205 on the positioning tube 201, so that the included angle between the first positioning support rod 208 and the second positioning support rod 209 and the positioning tube 201 changes, so that the regulating limiting plate 210 pushes and limits the sealing adapter pipe 103, thereby making the regulating and positioning of the sealing adapter pipe 103 convenient, and making the installation, limiting and pushing and disassembling of the tunneling machine 3 simple and convenient.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A trenchless pipeline construction method, comprising a jacking body (1), characterized in that: The jacking body (1) is equipped with a sealing jacking assembly (2) inside, and a tunneling machine (3) is installed at the front end of the jacking body (1). An installation cavity (101) is provided on the front side wall of the jacking pipe body (1). A limiting groove (102) is provided on the inner side wall of the front end of the jacking pipe body (1) corresponding to the installation cavity (101). A sealing adapter pipe (103) is installed on the jacking pipe body (1) through the installation cavity (101). A positioning groove (104) is provided on the front side wall of the sealing adapter pipe (103). A limiting block (105) is provided in a ring shape on the outer wall of the sealing adapter pipe (103) and inside the positioning groove (104). A positioning stop (106) is provided on the front end of the inner wall of the jacking pipe body (1) corresponding to the limiting block (105). A transition post (107) is provided on both sides of the outer end of the positioning stop (106) on the inner wall of the front end of the jacking pipe body (1). An adjustment groove (108) is provided on the inner side wall of the sealing adapter pipe (103). The sealing lifting assembly (2) includes a positioning tube (201), inside which is an adjusting screw (202). The two ends of the adjusting screw (202) are rotatably connected to the positioning tube (201) via positioning bearings (203). The middle of the adjusting screw (202) is rotatably connected to the positioning tube (201) via a positioning bushing (204). A symmetrical annular limit groove (205) is formed on the side wall of the positioning tube (201). Two sets of limit grooves (205) are correspondingly arranged before and after the positioning bushing (204). A first adapter (206) is provided on the adjusting screw (202) and behind the positioning bushing (204). A second adapter (207) is provided on the adjusting screw (202) and in front of the positioning bushing (204). A first positioning support rod (208) is rotatably mounted on the first adapter (206). A second positioning support rod (209) is rotatably mounted on the second adapter (207). An adjusting limit plate (210) is rotatably mounted on the other end of the first positioning support rod (208) and the second positioning support rod (209).

2. The trenchless pipe jacking method for pipeline construction according to claim 1, characterized in that: The sealing adapter (103) is adapted to the mounting cavity (101), and the length of the sealing adapter (103) is three-quarters of the opening depth of the mounting cavity (101).

3. The method of trenchless pipeline construction pipe jacking according to claim 1, characterized in that: The positioning block (106) extends through the inner wall of the jacking pipe body (1) to the interior of the installation cavity (101) and is correspondingly set with the limiting block (105).

4. The trenchless pipe jacking method for pipeline construction according to claim 1, characterized in that: The tunneling machine (3) is installed and connected to the jacking body (1) through a sealed transfer pipe (103).

5. The trenchless pipe jacking method for pipeline construction according to claim 1, characterized in that: The regulating chute (108) is configured with a blind hole groove structure. The regulating limiting plate (210) is configured to be compatible with the regulating chute (108). The side cross-section of the regulating limiting plate (210) is configured with a "right trapezoidal" structure.

6. The trenchless pipe jacking method for pipeline construction according to claim 1, characterized in that: The positioning block (106) is connected to the adapter column (107) at one end by fixing nuts on both sides.

7. The trenchless pipe jacking method for pipeline construction according to claim 1, characterized in that: The sealing adapter pipe (103) is positioned and slidably connected to the jacking pipe body (1) through the adjustable limit plate (210) and the adjustable slide groove (108).

8. The trenchless pipe jacking method for pipeline construction according to claim 1, characterized in that: The first adapter (206) and the second adapter (207) are slidably connected to the adjacent limiting groove (205).

9. The trenchless pipe jacking method for pipeline construction according to claim 1, characterized in that: The regulating screw (202) is designed with opposite thread grooves on the front and rear threads, centered on the positioning bushing (204).

10. The trenchless pipe jacking method for pipeline construction according to claim 1, characterized in that: The first positioning support rod (208) and the second positioning support rod (209) are both ends of a "U"-shaped groove structure.

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