A pipe jacking section arranged in a rectangular curve and a method of using the same

Abstract

The present invention provides a top pipe section arranged in a rectangular curve and a method for using the same, wherein the top pipe section comprises: a plurality of pipe section bodies 1 spliced ​​end to end; a seal 2 located at the connection between two adjacent pipe section bodies 1; a base 3 located on the inner wall of each of the pipe section bodies 1; and a pull rod 4 connecting two adjacent bases 3, wherein the pull rod 4 is used to change the angle between two adjacent pipe section bodies 1, thereby being able to change the movement direction of the top end of the pipe section body in a curved tunnel by changing the bending angle of the top ends of several pipe section bodies.

Description

Technical Field

[0001] The invention relates to the technical field of pipe jacking sections, and in particular to a pipe jacking section arranged in a rectangular curve and a use method thereof. Background Art

[0002] As a modern tunnel construction method, rectangular pipe jacking tunnel technology is increasingly favored in modern urban construction due to its unique advantages. This technology mainly uses a pipe jacking machine to advance underground to form a rectangular cross-section tunnel. Compared with traditional tunnel excavation methods, rectangular pipe jacking tunnel construction has the advantages of fast construction speed, small impact on the ground, high construction safety, environmental friendliness, strong adaptability and significant economic benefits.

[0003] The design of conventional rectangular pipe jacking tunnels is mostly linear. This is because the structure of a linear tunnel is simple and the control of the jacking force during construction is relatively simple.

[0004] However, when constructing a curved top pipe segment within the turning path of a curved section, there is uneven contact between the pipe openings of adjacent pipe segments in the curved section, and the turning angle is too large, resulting in excessive concentrated stress on the end face of the pipe segment interface, which is prone to damage. This requires controlling the gap between two adjacent pipe segments and the allowable turning angle. Summary of the invention

[0005] The present invention aims to provide a top pipe section arranged in a rectangular curve and a method of using the same, which can solve the technical problems of uneven contact between adjacent pipe section openings in the curved section, excessive concentrated stress on the end face of the pipe section interface due to excessive turning angles, and easy damage at the pipe section interface.

[0006] According to one aspect of the present invention, there is provided a top pipe segment arranged in a rectangular curve, comprising: a plurality of pipe segment bodies 1 spliced ​​end to end; a seal 2 located at the connection between two adjacent pipe segment bodies 1; a base 3 located on the inner wall of each of the pipe segment bodies 1; and a pull rod 4 connecting two adjacent bases 3, wherein the pull rod 4 is used to change the angle between two adjacent pipe segment bodies 1.

[0007] Preferably, the pipe segment body 1 includes: a raised structure 101 relatively distributed on both sides, which is provided at one end of the pipe segment body 1, and the inner side surface of the raised structure 101 is a spherical concave surface 1011, wherein the centers of the two corresponding spherical concave surfaces 1011 coincide with each other; and a spherical convex surface 102 relatively distributed on both sides, which is provided at the other end of the pipe segment body 1, wherein the centers of the two corresponding spherical convex surfaces 102 coincide with each other; wherein the cooperation between the spherical concave surface 1011 and the spherical convex surface 102 is used to realize the installation of the two adjacent pipe segment bodies 1.

[0008] Preferably, the seal 2 includes: a compression airbag 201; and a first convex ring 202 and a second convex ring 203, which are respectively located at both ends of the compression airbag 201, wherein the first convex ring 202 and the second convex ring 203 are respectively located in the ports of the two adjacent pipe segment bodies 1, and expand outward when the compression airbag 201 is squeezed.

[0009] Preferably, a bayonet 204 is provided on the outer side of the compressed air bag 201 , and the bayonet 204 is sleeved on the end of the bottom rod 301 and distributed correspondingly to the bottom rod 301 .

[0010] Preferably, the base 3 comprises: a bottom rod 301 , which is provided with a mounting hole for passing bolts to be mounted on the inner wall of the pipe segment body 1 ; and a stand 302 , the end of which is mounted in a long slot 3011 of the bottom rod 301 .

[0011] Preferably, the stand 302 is also provided with a shell 303 , a rotating member is installed in the shell 303 , and a connecting member is provided at the end of the stand 302 , and two connecting members are connected by the pull rod 4 .

[0012] Preferably, the stand 302 is a "J"-shaped structure, with through grooves 3021 provided on the two opposite outer sides of the stand 302, and slots 3022 provided at the ends of the stand 302; the connecting member includes a mounting seat 308, one end of the mounting seat 308 passes through the slot 3022 and is installed in conjunction with a nut 307, and the other end of the mounting seat 308 is provided with a deep groove, in which a hinge seat 309 is provided, and the hinge seat 309 is connected to the mounting seat 308 by a pin rod.

[0013] Preferably, the rotating member includes: a rotating rod 305 , wherein the rotating rod 305 is installed in a slot 3031 of the housing 303 ; and a turbine 306 matched with the rotating rod 305 .

[0014] Preferably, the bottom end of the pin shaft 311 of the mounting seat 308 extends into the groove body 3031, and a cover plate 304 is installed on the opening of the shell 303, and a large gear 310 is installed on the cover plate 304. The large gear 310 cooperates with the transmission gear installed on the upper end of the pin shaft 311. A U-shaped frame is fixed on the large gear 310, and the large gears 310 are connected by a pull rope 5.

[0015] According to another aspect of the present invention, a method for using a top pipe segment arranged in a rectangular curve is provided, comprising: splicing a plurality of pipe segment bodies 1 end to end to form a tunnel, wherein bases 3 are respectively provided on the inner walls of the plurality of pipe segment bodies 1; providing seals 2 at the connection between the plurality of pipe segment bodies 1; and shortening the distance between two adjacent bases 3 by a pull rod 4 to achieve bending of the plurality of pipe segment bodies 1.

[0016] The present invention provides a top pipe segment arranged in a rectangular curve and a method for using the same. The top pipe segment includes: a plurality of pipe segment bodies 1 spliced ​​end to end; a seal 2 located at the connection between two adjacent pipe segment bodies 1; a base 3 located on the inner wall of each of the pipe segment bodies 1; and a pull rod 4 connecting two adjacent bases 3, wherein the pull rod 4 is used to change the angle between two adjacent pipe segment bodies 1, so that in a curved tunnel, by changing the bending angles of the top ends of several pipe segment bodies, the movement direction of the top ends of the pipe segment bodies can be changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 is a schematic diagram of the internal structure of a jacking section according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of a pipe segment body splicing structure according to an embodiment of the present invention;

[0020] Figure 3 According to an embodiment of the present invention Figure 2 A schematic cross-sectional structure diagram of ;

[0021] Figure 4 is a schematic diagram of the matching structure of a pipe segment body and a sealing member according to an embodiment of the present invention;

[0022] Figure 5 is a schematic diagram of the front end structure of a pipe segment body according to an embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of a horizontal cross-section of a pipe segment body according to an embodiment of the present invention;

[0024] Figure 7 is a schematic diagram of a vertical cross-section of a pipe segment body according to an embodiment of the present invention;

[0025] Figure 8 is a schematic diagram of a seal according to an embodiment of the present invention;

[0026] Fig. 9 is a schematic cross-sectional view of a seal according to an embodiment of the present invention;

[0027] Fig.10 is a schematic diagram of the connection between the base and the pull rod according to an embodiment of the present invention;

[0028] Fig.11 is a partial schematic diagram of a base according to an embodiment of the present invention;

[0029] Fig.12 is a schematic diagram of a base and a pull rod installation structure according to an embodiment of the present invention;

[0030] Fig.13 According to an embodiment of the present invention Figure 3 A schematic diagram of the enlarged structure at A; and

[0031] Fig.14 Schematic diagram of bending of a top pipe section according to an embodiment of the present invention.

[0032] Among them, 1. pipe segment body; 101. raised structure; 1011. spherical concave surface; 102. spherical convex surface; 103. base slot; 2. seal; 201. compressed air bag; 202. first convex ring; 203. second convex ring; 204. bayonet; 3. base; 301. bottom rod; 3011. long slot; 302. stand; 3021. through slot; 3022. slot; 303. shell; 3031. slot body; 304. cover plate; 305. rotating rod; 306. turbine; 307. nut; 308. mounting seat; 309. hinged seat; 310. large gear; 311. pin; 4. pull rod; 401. sleeve; 402. threaded sleeve; 403. long rod; 5. pull rope. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] Reference will now be made in detail to various embodiments of the present invention, examples of which are shown in the accompanying drawings and described below. For ease of interpretation and precise definition in the appended claims, the terms "upper", "lower", "inner" and "outer" are used to describe features of the exemplary embodiments shown in the drawings with reference to their positions.

[0035] According to an embodiment of the present invention, there is provided a top pipe segment arranged in a rectangular curve, comprising: a plurality of pipe segment bodies 1 spliced ​​end to end; a seal 2 located at the connection between two adjacent pipe segment bodies 1; a base 3 located on the inner wall of each of the pipe segment bodies 1; and a pull rod 4 connecting two adjacent bases 3, wherein the pull rod 4 is used to change the angle between two adjacent pipe segment bodies 1.

[0036] In the related art, when constructing a curved top pipe segment in a curved section turning path, the adjacent pipe segments in the curved section have non-uniform contact with each other, and the turning angle is too large to form excessive concentrated stress on the end face of the pipe segment interface, which is prone to damage at the pipe segment interface. In the embodiment of the present invention, a base and a pull rod are used on the curved side of several pipe segment bodies, and the base is fixed on the inner wall of the pipe segment body. By shortening the distance between the two bases, the angle formed between the two pipe segment bodies is changed. In a straight tunnel, the center lines of the two pipe segment bodies coincide with each other. In a curved tunnel, the movement direction of the top of the pipe segment body is changed by changing the bending angle of the top of several pipe segment bodies.

[0037] According to an embodiment of the present invention, the pipe segment body 1 includes: a raised structure 101 relatively distributed on both sides, which is provided at one end of the pipe segment body 1, and the inner side surface of the raised structure 101 is a spherical concave surface 1011, wherein the centers of the two corresponding spherical concave surfaces 1011 coincide with each other; and a spherical convex surface 102 relatively distributed on both sides, which is provided at the other end of the pipe segment body 1, wherein the centers of the two corresponding spherical convex surfaces 102 coincide with each other; wherein the cooperation between the spherical concave surface 1011 and the spherical convex surface 102 is used to realize the installation of the two adjacent pipe segment bodies 1.

[0038] In the embodiment of the present invention, the spherical concave surface 1011 and the spherical convex surface 102 cooperate to prevent the contact surface from being squeezed when two adjacent pipe segment bodies rotate relative to each other. In addition, the arc-shaped concave surface and the arc-shaped convex surface cooperate to limit the position of two adjacent pipe segment bodies and avoid mis-assembly.

[0039] According to an embodiment of the present invention, the seal 2 includes: a compressed air bag 201; and a first convex ring 202 and a second convex ring 203, which are respectively located at the two ends of the compressed air bag 201, wherein the first convex ring 202 and the second convex ring 203 are respectively located in the ports of the two adjacent pipe segment bodies 1, and expand outward when the compressed air bag 201 is squeezed.

[0040] In the embodiment of the present invention, after two adjacent pipe segment bodies are assembled, the compressed airbag is squeezed, and the gas inside the compressed airbag moves to both sides, so that the first convex ring and the second convex ring expand outward and fit closely to the inner wall of the pipe segment body, thereby improving the sealing effect.

[0041] According to the embodiment of the present invention, a bayonet 204 is disposed on the outer side of the compressed air bag 201 . The bayonet 204 is sleeved on the end of the bottom rod 301 and is distributed corresponding to the bottom rod 301 .

[0042] According to an embodiment of the present invention, the base 3 includes: a bottom rod 301, which is provided with a mounting hole for passing bolts to be installed on the inner wall of the pipe section body 1; and a vertical frame 302, the end of which is installed in the long groove 3011 of the bottom rod 301.

[0043] According to the embodiment of the present invention, the stand 302 is further provided with a shell 303 , a rotating member is installed in the shell 303 , and a connecting member is provided at the end of the stand 302 , and two connecting members are connected by the pull rod 4 .

[0044] According to an embodiment of the present invention, the stand 302 is a "J"-shaped structure, and through grooves 3021 are provided on the two opposite outer sides of the stand 302, and a slot hole 3022 is provided at the end of the stand 302; the connecting member includes a mounting seat 308, one end of the mounting seat 308 passes through the slot hole 3022 and is installed in conjunction with the nut 307, and the other end of the mounting seat 308 is provided with a deep groove, and a hinge seat 309 is provided in the deep groove, and the hinge seat 309 is connected to the mounting seat 308 by a pin rod.

[0045] According to the embodiment of the present invention, the rotating member includes: a rotating rod 305 , wherein the rotating rod 305 is installed in the slot 3031 of the housing 303 ; and a turbine 306 matched with the rotating rod 305 .

[0046] In the embodiment of the present invention, a worm gear structure is formed by a rotating rod and a turbine in the rotating member. During operation, the turbine can only be driven to rotate by the rotating rod. After the rotating rod stops rotating, self-locking can be achieved to prevent the turbine from rotating.

[0047] According to an embodiment of the present invention, the bottom end of the pin shaft 311 of the mounting seat 308 extends into the groove body 3031, a cover plate 304 is installed on the opening of the shell 303, a large gear 310 is installed on the cover plate 304, the large gear 310 cooperates with the transmission gear installed on the upper end of the pin shaft 311, a U-shaped frame is fixed on the large gear 310, and the large gears 310 are connected by a pull rope 5.

[0048] In the embodiment of the present invention, a synchronously rotating turbine and a transmission gear are installed on the pin shaft, and the transmission gear is meshed with the large gear. Since the outer diameter of the transmission gear is much smaller than the outer diameter of the large gear, when the driven gear drives the large gear to rotate, a labor-saving structure is formed. In the process of rotating the large gear, the pull rope passing through the U-shaped frame is wrapped around the U-shaped frame, thereby shortening the length of the pull rope and the pull rope connection end at this location, pulling the corresponding pipe segment body to bend to one side.

[0049] Specifically, a pin is installed on the mounting seat, and the rotating member includes a rotating rod and a turbine. The rotating rod is installed in the slot body of the shell, and the bottom end of the pin extends into the slot body. At the same time, a turbine that cooperates with the rotating rod is installed at the bottom end of the slot body. A cover plate is installed on the opening of the shell, and a large gear is installed on the cover plate. The large gear cooperates with the transmission gear installed on the upper end of the pin. A U-shaped frame is fixed on the large gear, and several large gears are connected by a pull rope. Due to the large volume and weight of the pipe segment body, it is difficult to pull the two pipe segment bodies close together by rotating the sleeve, so a rotating member is provided, and the rotating member is connected by a rotating rod. The worm gear structure is formed with the turbine. During operation, the turbine can only be driven to rotate by the rotating rod. After the rotating rod stops rotating, self-locking can be achieved to prevent the turbine from rotating. The pin shaft is equipped with a synchronously rotating turbine and a transmission gear, and the transmission gear is meshed with the large gear. Since the outer diameter of the transmission gear is much smaller than the outer diameter of the large gear, when the driven gear drives the large gear to rotate, a labor-saving structure is formed. In the process of rotating the large gear, the pull rope passing through the U-shaped frame is wrapped around the U-shaped frame, thereby shortening the length of the pull rope and the connection end of the pull rope, and pulling the corresponding pipe segment body to bend to one side.

[0050] According to another embodiment of the present invention, a method for using a top pipe segment arranged in a rectangular curve is provided, comprising: splicing a plurality of pipe segment bodies 1 end to end to form a tunnel, wherein bases 3 are respectively provided on the inner walls of the plurality of pipe segment bodies 1; providing seals 2 at the connection between the plurality of pipe segment bodies 1; and shortening the distance between two adjacent bases 3 by a pull rod 4 to achieve bending of the plurality of pipe segment bodies 1.

[0051] In the related art, when constructing a curved top pipe segment in a curved section turning path, the adjacent pipe segments in the curved section have non-uniform contact with each other, and the turning angle is too large to form excessive concentrated stress on the end face of the pipe segment interface, which is prone to damage at the pipe segment interface. In the embodiment of the present invention, a base and a pull rod are used on the curved side of several pipe segment bodies, and the base is fixed on the inner wall of the pipe segment body. By shortening the distance between the two bases, the angle formed between the two pipe segment bodies is changed. In a straight tunnel, the center lines of the two pipe segment bodies coincide with each other. In a curved tunnel, the movement direction of the top of the pipe segment body is changed by changing the bending angle of the top of several pipe segment bodies.

[0052] The method of the present invention is further described in detail below in conjunction with specific implementation modes and drawings.

[0053] like Figure 1 , Figure 2As shown, the top pipe segment includes: a pipe segment body 1, a seal 2, a base 3, and a pull rod 4, wherein the pull rod 4 is used to change the angle between two adjacent pipe segment bodies 1. In order to solve the problems of low construction accuracy, complex construction and high construction cost in the construction of curved sections in the prior art, an embodiment of the present invention proposes a top pipe segment arranged in a rectangular curve. By adopting a rectangular pipe segment and a spacing adjustment component, by shortening the spacing adjustment component connected between multiple rectangular pipe segments at the end, one side of the two rectangular pipe segments is contracted, and deflection along the connection is achieved, thereby changing the angle between the two rectangular pipe segments. In the curved section of the tunnel, by changing the curvature of the front ends of the multiple rectangular pipe segments, it is ensured that the front ends of the multiple rectangular pipe segments advance along the curved section of the tunnel. Through adjustment and real-time monitoring, the advancing direction of the front ends of the multiple rectangular pipe segments is ensured.

[0054] Figure 3 According to an embodiment of the present invention Figure 2 The cross-sectional structure diagram of Figure 3 As shown, B is the motion trajectory of the base of the uppermost pipe segment body and the connection point of the pull rod; C is the motion trajectory of the top end of the pull rod connected to the uppermost pipe segment body; the angle formed by DF is the deflection angle of the uppermost pipe segment body.

[0055] Assuming that the pipe segment body 1 at the middle does not rotate, and only the pipe segment body 1 at the upper end rotates, the pipe segment body 1 at the upper end rotates around the center of the circle B, and the movement path of the connection point between the pull rod 4 and the base 3 at the upper end is the circle B;

[0056] A circle C is obtained with the connection point between the pull rod 4 and the middle base 3 as the center. It can be seen that when the connection end between the pull rod 4 and the upper base 3 moves in the straight line D and straight line F regions, the pull rod 4 gradually shortens.

[0057] like Figure 4-Figure 7 As shown, one end of the pipe segment body 1 is provided with two relatively distributed protruding structures 101, and the inner side surface of the protruding structure 101 is a spherical concave surface 1011, and the other end of the pipe segment body 1 is provided with two relatively distributed spherical convex surfaces 102, wherein the corresponding centers of the two spherical concave surfaces 1011 on the pipe segment body 1 coincide with each other, and the corresponding centers of the two spherical convex surfaces 102 on the pipe segment body 1 coincide with each other, and the two pipe segment bodies 1 are installed by the cooperation of the spherical concave surfaces 1011 and the spherical convex surfaces 102; by the cooperation of the spherical concave surfaces 1011 and the spherical convex surfaces 102, when the two pipe segment bodies 1 rotate relative to each other, the contact surfaces will not be squeezed, and the two pipe segment bodies 1 are limited by the cooperation of the arc-shaped concave surfaces 1011 and the arc-shaped convex surfaces 102 to avoid the two pipe segment bodies 1 from being misassembled.

[0058] like Figure 8 and Fig. 9As shown, the main body of the sealing member 2 is a compression air bag 201 , and a first convex ring 202 and a second convex ring 203 are respectively provided at both ends of the compression air bag 201 , and the first convex ring 202 and the second convex ring 203 are respectively installed in the ports of the two pipe segment bodies 1 .

[0059] When the compressed air bag 201 is squeezed, the first convex ring 202 and the second convex ring 203 both expand outward.

[0060] After the two pipe segment bodies 1 are assembled, the compressed air bag 201 is squeezed, and the gas inside the compressed air bag 201 moves to both sides, so that the first convex ring 202 and the second convex ring 203 expand outwards and thus adhere to the inner wall of the pipe segment body 1, thereby improving the sealing effect.

[0061] In addition, a bayonet 204 is provided on the outer side of the 201 , and the bayonet 204 is distributed corresponding to the bottom rod 301 , and the bayonet 204 is sleeved on the end of the bottom rod 301 , so as to achieve positioning installation.

[0062] like Figure 10-12 As shown, a group of bases 3 are installed, and the base 3 includes a bottom rod 301 and a vertical frame 302. The bottom rod 301 is provided with a long groove 3011, and the end of the vertical frame 302 is installed in the long groove 3011, wherein the bottom rod 301 is provided with a mounting hole, and the bolt passes through the mounting hole and is installed on the inner wall of the pipe segment body 1.

[0063] A shell 303 is installed on one side of the stand 302, a rotating part is installed in the shell 303, a connecting part is installed at the end of the stand 302, and the two connecting parts are connected by a pull rod 4.

[0064] The frame 302 is a "J"-shaped structure, with through grooves 3021 provided on the two opposite outer sides of the frame 302, and a slot hole 3022 provided at the end of the frame 302. The connecting piece includes a mounting seat 308, one end of the mounting seat 308 passes through the slot hole 3022 and is installed in conjunction with the nut 307, and the other end of the mounting seat 308 is provided with a deep groove, in which a hinge seat 309 is provided, and the hinge seat 309 and the mounting seat 308 are connected by a pin rod.

[0065] A pin shaft 311 is installed on the mounting seat 308, and the rotating part includes a rotating rod 305 and a turbine 306. The rotating rod 305 is installed in the groove body 3031 of the shell 303, and the bottom end of the pin shaft 311 extends into the groove body 3031. At the same time, a turbine 306 that cooperates with the rotating rod 305 is installed at the bottom end of the groove body 3031. A cover plate 304 is installed on the opening of the shell 303, and a large gear 310 is installed on the cover plate 304. The large gear 310 cooperates with the transmission gear installed on the upper end of the pin shaft 311, and a U-shaped frame is fixed on the large gear 310.

[0066] Several large gears 310 are connected by a pull rope 5 .

[0067] Due to the large volume and weight of the pipe segment body 1, it is difficult to pull the two pipe segment bodies 1 closer together by rotating the sleeve 401; therefore, a rotating member is provided, in which a worm gear structure is formed by a rotating rod 305 and a turbine 306. During operation, the turbine 306 can only be driven to rotate by the rotating rod 305. After the rotating rod 305 stops rotating, self-locking can be achieved to prevent the turbine 306 from rotating; a synchronously rotating turbine 306 and a transmission gear are installed on the pin shaft 311, and the transmission gear is meshed with the large gear 310. Since the outer diameter of the transmission gear is much smaller than the outer diameter of the large gear 310, a labor-saving structure is formed when the driven gear drives the large gear 310 to rotate; in the process of rotating the large gear 310, the draw rope 5 passing through the U-shaped frame is wrapped around the U-shaped frame, thereby shortening the length of the draw rope 5 at this location and the connection end of the draw rope 5, pulling the corresponding pipe segment body 1 to bend to one side.

[0068] like Fig.13 As shown, the pull rod 4 includes a sleeve 401, an internal thread is provided in the sleeve 401, two threaded sleeves 402 are installed in the sleeve 401, and the two threaded sleeves 402 are respectively connected to two long rods 403; when it is necessary to reduce the angle between the two pipe segment bodies 1 located at the head, the distance between the two bases 3 is shortened by rotating the pull rod 4, so that the two pipe segment bodies 1 are bent to one side.

[0069] Fig.14 Schematic diagram of bending of the top pipe section according to an embodiment of the present invention. Fig.14 As shown, an embodiment of the present invention further provides a method for using a rectangular curved pipe jacking section, comprising the following steps:

[0070] Step 1: Splice several pipe segment bodies 1 end to end to form a tunnel, and install the base 3 and the pull rod 4 on the inwardly bent side of the several pipe segment bodies 1;

[0071] Step 2: shorten the distance between the two bases 3 by rotating the pull rod 4, so that the two pipe segment bodies 1 are bent to one side;

[0072] Step three, during the adjustment process, when the large gear 310 is rotated, the draw rope 5 passing through the U-shaped frame is wrapped around the U-shaped frame, thereby shortening the length of the draw rope 5 at this point and the connecting end of the draw rope 5, pulling the corresponding pipe section body 1 to bend to one side, and fixing the position by tightening the sleeve 401.

[0073] The present invention has the following beneficial effects:

[0074] (1) The present invention is provided with a base and a pull rod, which are installed on the bending sides of several pipe segment bodies. The base is fixed on the inner wall of the pipe segment body. By shortening the distance between the two bases, the angle formed between the two pipe segment bodies is changed. By changing the bending angle of the top ends of several pipe segment bodies, the movement direction of the top ends of the pipe segment bodies is changed.

[0075] (2) The present invention achieves that when the two pipe segment bodies rotate relative to each other, the contact surfaces will not be squeezed by the cooperation of the spherical concave surface and the spherical convex surface. The two pipe segment bodies are limited by the cooperation of the arcuate concave surface and the arcuate convex surface, thereby preventing the two pipe segment bodies from being misassembled.

[0076] (3) It is difficult to pull the two pipe sections together by rotating the sleeve in the present invention, so a rotating member is provided. The rotating member comprises a worm gear structure formed by a rotating rod and a turbine. During operation, the turbine can only be driven to rotate by the rotating rod. After the rotating rod stops rotating, self-locking can be achieved to prevent the turbine from rotating. A synchronously rotating turbine and a transmission gear are installed on the pin shaft. The transmission gear is meshed with the large gear. Since the outer diameter of the transmission gear is much smaller than the outer diameter of the large gear, when the driven gear drives the large gear to rotate, a labor-saving structure is formed, which is convenient for driving the large gear to rotate.

[0077] The above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications may be made based on the following description, and these various changes, modifications, substitutions and deformations derived from the principles and spirit of the present invention still fall within the scope of protection of the present invention.

Claims

1. A rectangular curved pipe section, characterized in that: include: A plurality of pipe segment bodies (1) spliced ​​end to end; A sealing member (2) located at the connection between two adjacent pipe segment bodies (1); a base (3) located on the inner wall of each pipe segment body (1); and A tie rod (4) connecting two adjacent bases (3), wherein the tie rod (4) is used to change the angle between two adjacent pipe segment bodies (1); The pipe segment body (1) comprises: The convex structures (101) are arranged on two opposite sides and are disposed at one end of the pipe segment body (1); the inner side surface of the convex structure (101) is a spherical concave surface (1011), wherein the centers of the circles corresponding to the two spherical concave surfaces (1011) coincide with each other; and Spherical convex surfaces (102) distributed opposite to each other on both sides are provided at the other end of the pipe segment body (1), wherein the centers of circles corresponding to the two spherical convex surfaces (102) coincide with each other; The cooperation between the spherical concave surface (1011) and the spherical convex surface (102) is used to achieve the installation of the two adjacent pipe segment bodies (1).

2. The pipe jacking section according to claim 1, characterized in that: The sealing element (2) comprises: A compressed air bag (201); and The first convex ring (202) and the second convex ring (203) are respectively located at two ends of the compression airbag (201). The first convex ring (202) and the second convex ring (203) are respectively located in the ports of the two adjacent pipe segment bodies (1), and expand outward when the compression airbag (201) is squeezed.

3. The jacking section according to claim 2, characterized in that: A bayonet (204) is provided on the outer side of the compressed air bag (201), and the bayonet (204) is sleeved on the end of the bottom rod (301) and is distributed corresponding to the bottom rod (301).

4. The pipe jacking section according to claim 1, characterized in that: The base (3) comprises: A bottom rod (301), the bottom rod (301) being provided with a mounting hole for passing a bolt through so as to be mounted on the inner wall of the pipe segment body (1); and A stand (302), wherein an end of the stand (302) is mounted in the long slot (3011) of the bottom rod (301).

5. The pipe jacking section according to claim 4, characterized in that: The stand (302) is also provided with a shell (303), a rotating member is installed in the shell (303), and a connecting member is provided at the end of the stand (302), and two connecting members are connected via the pull rod (4).

6. The pipe jacking section according to claim 5, characterized in that: The stand (302) is a "J"-shaped structure, two opposite outer sides of the stand (302) are provided with through grooves (3021), and the end of the stand (302) is provided with a slot hole (3022); The connecting member comprises a mounting seat (308), one end of the mounting seat (308) passes through a slotted hole (3022) and is mounted in cooperation with a nut (307), the other end of the mounting seat (308) is provided with a deep groove, a hinge seat (309) is provided in the deep groove, and the hinge seat (309) and the mounting seat (308) are connected via a pin rod.

7. The pipe jacking section according to claim 6, characterized in that: The rotating member comprises: A rotating rod (305), wherein the rotating rod (305) is installed in a slot (3031) of the housing (303); and A turbine (306) cooperates with the rotating rod (305).

8. The pipe jacking section according to claim 7, characterized in that: The bottom end of the pin shaft (311) of the mounting seat (308) extends into the groove body (3031). A cover plate (304) is installed on the opening of the housing (303), a large gear (310) is installed on the cover plate (304), the large gear (310) cooperates with a transmission gear installed on the upper end of the pin shaft (311), a U-shaped frame is fixed on the large gear (310), and the large gears (310) are connected by a pull rope (5).

9. A method for using the rectangular curve arranged jacking section as claimed in claim 1, characterized in that: include: A plurality of pipe segment bodies (1) are spliced ​​end to end to form a tunnel, wherein bases (3) are respectively provided on the inner walls of the plurality of pipe segment bodies (1); A sealing member (2) is provided at the connection between the plurality of pipe segment bodies (1); and The distance between two adjacent bases (3) is shortened by a pull rod (4), thereby achieving bending of the plurality of pipe segment bodies (1).

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