Infinite Propulsion Method of Steel Pipe

Abstract

The present invention provides a steel pipe infinite thrusting method that enables the construction of a steel pipe without a thrust limit by repeatedly securing a segment assembly space at the leading end of the steel pipe and installing main pipe segments. According to a suitable embodiment of the present invention, the method comprises: (a) a thrusting main pipe, a thrusting pipe installed to be slidably movable on the outer surface of the leading end of the thrusting main pipe, a thrusting pipe pusher disposed inside the leading end of the thrusting pipe, a plurality of thrusting jacks connected to the thrusting pipe pusher to thrust the thrusting pipe by a certain amount, and a pusher reaction pipe disposed between the leading end of the thrusting main pipe and the rear end of the thrusting pipe pusher to provide a reaction force to the thrusting jacks and simultaneously be pulled by the thrusting jacks to secure a segment assembly space; (b) a step of placing the thrusting device at a launching position, and then generating a jack force with a primary pressure jack supported by a reaction wall to thrust the thrusting pipe together with the thrusting main pipe into the ground to a thrust limit line; and (c) a step of thrusting the thrusting pipe by a certain amount using the jack force of the thrusting jacks. (d) a step of securing a segment assembly space between the pusher reaction tube and the leading end of the main tube by pulling the pusher reaction tube with a propulsion jack; (e) a step of additionally installing a main tube segment in the segment assembly space; and (f) subsequently, the steps of (c), (d), and (e) are repeated sequentially until the section where the infinite propulsion method is applied.

Description

Technology Field

[0001] The present invention relates to a steel pipe thrusting method applicable to the construction of trenchless underground structures, water and sewage pipes, gas pipes, electrical cable pipes, oil pipelines, etc., and in particular, to a steel pipe infinite thrusting method that enables the construction of steel pipes without thrusting limits by repeatedly securing a segment assembly space at the leading end of the thrusting main pipe and installing the main pipe segments. Background Technology

[0002] For example, the trenchless method is known as one of the methods for constructing underground structures to utilize underground space. This method offers the advantages of resolving civil complaints regarding traffic inconvenience during urban construction and minimizing the cost of relocating obstacles. Among the trenchless methods currently widely used is the pipe loop method. This method involves inserting steel pipes along the outer edge of the excavation cross-section prior to tunnel excavation to form a loop tailored to the structure's shape. During excavation, this loop is directly supported by shoring materials to suppress ground loosening and surface deformation caused by the process. However, there is a propulsion limit imposed by the capacity of the hydraulic jacks used to drive the steel pipes. Consequently, it becomes difficult to drive the pipes indefinitely. Therefore, a steel pipe driving method suitable for constructing long underground structures or tunnels, as well as for installing water and sewage pipes, gas pipes, electrical cables, and oil pipelines, is required.

[0003] As the background technology for the present invention, Korean registered patent No. 10-1507598 (Patent Document 1) proposes a 'hydraulic propulsion excavation device'. This determines the excavation direction by adjusting assembly shoes each connected to a plurality of second hydraulic jacks, and propels a landfill box with a first hydraulic jack.

[0004] Another background technology of the present invention is Korean registered patent No. 10-0891960 (Patent Document 2), which proposes a ‘buried pipeline propulsion method capable of correcting the propulsion direction.’ This method allows the propulsion direction to be corrected to the normal path when the propulsion direction deviates from the normal path while propulsioning a pipe, and enables the propulsion to be bent when an obstruction is located.

[0005] However, while the aforementioned background technologies allow for control of the propulsion direction, there is a problem in that it is difficult to overcome propulsion limitations due to the capacity limitations of the hydraulic jack. Prior art literature

[0006] Korean Registered Patent No. 10-1507598 Korean Registered Patent No. 10-0891960 The problem to be solved

[0007] The purpose of the present invention is to provide a steel pipe infinite thrust method that enables the construction of a steel pipe without thrust limits by repeatedly securing a segment assembly space at the leading end of the steel pipe and installing the main pipe segment. means of solving the problem

[0008] According to a suitable embodiment of the present invention, the method comprises: (a) a propulsion device comprising a propulsion main pipe, a propulsion pipe slidably installed on the outer surface of the leading end of the propulsion main pipe, a propulsion pipe pusher disposed inside the leading end of the propulsion pipe, a plurality of propulsion jacks connected to the propulsion pipe pusher to propel the propulsion pipe by a certain amount, and a pusher reaction pipe disposed between the leading end of the propulsion main pipe and the rear end of the propulsion pipe pusher to provide a reaction force for the propulsion jacks and simultaneously being pulled by the propulsion jacks to secure a segment assembly space; (b) a step of placing the propulsion device at a launch position, and then generating a jack force with a primary pressure jack supported by a reaction wall to propel the propulsion pipe together with the propulsion main pipe into the ground to a propulsion limit line; (c) a step of propulsing the propulsion pipe by a certain amount using the jack force of the propulsion jacks; (d) a step of pulling the pusher reaction pipe with the propulsion jacks to secure a segment assembly space between the pusher reaction pipe and the leading end of the propulsion main pipe; and (e) a step of additionally installing a main pipe segment in the segment assembly space. (f) Afterwards, the steps of (c), (d), and (e) are repeated sequentially until the application section of the infinite propulsion method.

[0009] In addition, in step (a), the propulsion tube is further characterized by having a reinforcing ring installed at the tip of the propulsion tube and a ring plate fixedly installed on the inner surface of the propulsion tube at a certain distance from the tip of the propulsion tube, having an outer diameter equal to the inner diameter of the propulsion tube.

[0010] In addition, in step (a), the thrust tube pusher is characterized by being manufactured in the form of a tube having an outer diameter equal to the inner diameter of the thrust tube.

[0011] In addition, at step (e), the main section is characterized by being transported suspended from a hoist supported by a rail for transporting soil and the section, which is installed on the upper interior of the main section and the main section.

[0012] In addition, at step (e), the main building segment is characterized by being transported by being mounted on a trolley that is supported on the inner lower surface of the main building and the main building segment.

[0013] In addition, at step (e), the main building segment is characterized by being installed by connecting multiple divided segments through connecting steel plates.

[0014] In addition, at step (e), the main building segment is characterized by being installed such that multiple divided segments are connected to each other through hinges. Effects of the invention

[0015] According to the steel pipe infinite thrusting method of the present invention, the installation of the main pipe segment and the securing of segment assembly space through the thrusting of the thrust pipe at the leading end of the main pipe and the pulling of the push reaction pipe via a thrust jack can be carried out without thrust limits. Therefore, it is possible to construct not only trenchless underground structures such as tunnels or underground passages with relatively long construction sections, but also pipelines such as water and sewage pipes, gas pipes, electrical cable pipes, and oil pipelines.

[0016] In addition, since the main pressure jack is used only when the main propulsion pipe is propelled and not when the propulsion pipe is propelled, there is an advantage in being able to select a smaller capacity main pressure jack. Brief explanation of the drawing

[0017] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description thereof; therefore, the present invention should not be interpreted as being limited only to the matters described in the attached drawings. FIG. 1 is a configuration diagram of a propulsion device according to an embodiment of the present invention. FIG. 2 is a partially exploded view of the propulsion device shown in FIG. 1. FIG. 3 is a side view of the thrust pipe pusher shown in FIG. 2. FIG. 4 is a side view of the pusher reaction tube shown in FIG. 2. FIG. 5 is an exemplary diagram for transporting a main building segment according to an embodiment of the present invention. FIG. 6a is an assembly process diagram of one form of a main body segment according to an embodiment of the present invention. Fig. 6b is the joining process of the main body segments shown in Fig. 6a. FIG. 7 is another exemplary diagram for transporting a main building segment according to an embodiment of the present invention. FIGS. 8a to 8c are flowcharts showing the process of execution according to an embodiment of the present invention in sequence. Specific details for implementing the invention

[0018] The present invention will be described in detail below with reference to embodiments shown in the attached drawings, but the presented embodiments are exemplary for a clear understanding of the present invention and the present invention is not limited thereto.

[0019] <Preparation of propulsion device (10)>

[0020] First, a propulsion device (10) is provided as shown in FIGS. 1 to 4. The propulsion device (10) is composed of a propulsion main tube (12), a propulsion tube (14) installed to be slidably movable on the outer surface of the front end of the propulsion main tube (12), a propulsion tube pusher (16) disposed inside the front end of the propulsion tube (14), a plurality of propulsion jacks (18) connected to the propulsion tube pusher (16) to propel the propulsion tube (14) by a certain amount, and a pusher reaction tube (20) disposed between the front end of the propulsion main tube (12) and the rear end of the propulsion tube pusher (16) to provide a reaction force of the propulsion jack (18) and simultaneously be pulled by the propulsion jack (18) to secure a segment assembly space (SA).

[0021] At this stage, the propulsion main tube (12) has a length (L) that does not exceed the propulsion limit line of the original pressure jack (40). Additionally, the propulsion tube (14) may be equipped with a reinforcing ring (141) installed at the tip to reinforce the propulsion tube (14), and a ring plate (142) fixedly installed on the inner surface of the propulsion tube (14) at a certain distance from the tip of the propulsion tube (14), having an outer diameter equal to the inner diameter of the propulsion tube (14). Furthermore, the propulsion tube pusher (16) may be manufactured in the form of a tube having an outer diameter equal to the inner diameter of the propulsion tube (14). Thus, in this embodiment, the propulsion tube pusher (16) is configured to propel the propulsion tube (14) through the ring plate (142).

[0022] Promotion of the Headquarters

[0023] Next, as shown in Fig. 8a (a), after placing the propulsion device (10) at the launch position, a jack force is generated by a primary jack (40) supported by a reaction wall (30) to propel the propulsion pipe (14) together with the propulsion main pipe (12) into the ground to the propulsion limit line (PL).

[0024] Here, the propulsion main pipe (12) can be understood as the section corresponding to when the propulsion pipe (14) reaches the propulsion limit line (PL) by joining a pipe body having a certain unit length and large diameter to the propulsion. The launch position can be a launch port having an area excavated to a certain depth in the ground. In this embodiment, the diameter of the propulsion main pipe (12) is 2.5M and the unit length is 3M, but the present invention is not limited to these dimensions. Additional internal excavation may be performed during the propulsion of the propulsion main pipe (12).

[0025] <Promotion Officer's Initial Promotion>

[0026] Next, as shown in Fig. 8a (b), the thrust pipe (14) is propelled by a certain amount using the jack force of the thrust jack (18). The thrust pipe (14) can be propelled, for example, 1M through the stroke of the thrust jack (18). As the thrust pipe (14) is propelled in this way, a certain gap (G) is created between the pusher reaction pipe (20) and the thrust pipe (14). This gap (G) provides a space where the pusher reaction pipe (20) is positioned in a subsequent process. Additional internal excavation may be performed when the thrust pipe (14) is propelled.

[0027] Securing Segment Assembly Space

[0028] Next, as shown in (c) of FIG. 8a, the operation of pulling the pusher reaction tube (20) with the propulsion jack (18) is performed. The pulling operation of the propulsion jack (18) can utilize the folding force generated by switching the direction of the hydraulic fluid. As a result, the pusher reaction tube (20) approaches the propulsion tube (14), which was separated, and is positioned in close contact. Additionally, a segment assembly space (SA) located on the inner surface of the propulsion tube (14) is secured between the pusher reaction tube (20) and the tip of the propulsion main tube (12). The segment assembly space (SA) serves as the space before the pusher reaction tube (20) moves, and is protected on the inner surface of the propulsion tube (14), appearing isolated from the surrounding soil.

[0029] <Additional Installation of Main Building Segments>

[0030] Next, as shown in (d) of Fig. 8b, the main building segment (13) is transported to the segment assembly space (SA) and additionally installed.

[0031] Here, as an example, the method of transporting the main section (13) can be to transport the main section (13) by suspending it from a hoist (17) that is supported by a rail (15) for transporting soil and segments installed on the upper inner side of the main section (12) and the main section (13), as shown in FIG. 5. As another example, as shown in FIG. 7, the main section (13) can be transported by loading it onto a trolley (19) that is supported and moved on the lower inner side of the main section (12) and the main section (13).

[0032] The main building segment (13) can be installed in one form by connecting multiple divided segments (131) as shown in FIG. 6a and FIG. 6b through a connecting plate (132). The main building segment (13) can also be installed in another form by connecting multiple divided segments (131) as shown in FIG. 7 through a hinge (133).

[0033] < Repeat propulsion of the propulsion pipe, securing of segment assembly space, and additional installation of main building segments >

[0034] Afterwards, as shown in (e) of FIG. 8b and FIG. 8c, the steps of pushing the aforementioned propulsion pipe (14), securing the segment assembly space (SA), and installing the main pipe segment (13) are repeated sequentially until the section where the infinite propulsion method is applied. For example, the steps of pushing the propulsion pipe (14), securing the segment assembly space (SA), and installing the main pipe segment (13) can be repeated sequentially until a segment assembly space (SA) is secured in contact with the arrival position (E) (arrival point) where the main pipe segment (13) can be assembled.

[0035] In this way, the installation of the main pipe segment (13) can be completed sequentially up to the required section. Of course, internal excavation can be carried out in parallel each time the propulsion pipe (14) is advanced.

[0036] The steel pipe infinite thrust method of the present invention described above can be applied to the construction of various pipelines, including not only trenchless underground structures such as underground passages and tunnels, but also water and sewage pipes, gas pipes, electrical cable pipes, and oil pipelines.

[0037] Although the present invention has been described in detail with reference to the presented embodiments, those skilled in the art may make various modifications and variations without departing from the technical spirit of the present invention by referring to the presented embodiments. The present invention is not limited by such modifications and variations, but is limited only by the claims appended below. Explanation of the symbols

[0038] 10: Propulsion system 12: Promotion Headquarters 13: Main Building Segment 131: Partitioned segment 132: Connecting steel plate 133: Hinge 14: Propulsion Officer 141: Reinforcement ring 142: Ring plate 15: Rails for transporting soil and segments 16: Propulsion tube pusher 17: Hoist 18: Propulsion Jack 19: Debit 20: Pusher reaction tube 30: Reaction wall 40: Original pressure jack

Claims

Claim 1 (a) a step of providing a propulsion device (10) comprising a propulsion main pipe (12), a propulsion pipe (14) installed to slide movably on the outer surface of the leading end of the propulsion main pipe (12), a propulsion pipe pusher (16) disposed inside the leading end of the propulsion pipe (14), a plurality of propulsion jacks (18) connected to the propulsion pipe pusher (16) to propel the propulsion pipe (14) by a certain amount, and a pusher reaction pipe (20) disposed between the leading end of the propulsion main pipe (12) and the rear end of the propulsion pipe pusher (16) to provide a reaction force for the propulsion jack (18) and simultaneously being pulled by the propulsion jack (18) to secure a segment assembly space (SA); (b) a step of placing the propulsion device (10) at a launch position, and then generating a jack force with a primary pressure jack (40) supported by a reaction wall (30) to propel the propulsion pipe (14) together with the propulsion main pipe (12) into the ground to a propulsion limit line (PL); and (c) A step of propelling the propulsion pipe (14) by a certain amount (S) using the jack force of the propulsion jack (18); (d) a step of securing a segment assembly space (SA) between the pusher reaction pipe (20) and the front end of the propulsion main pipe (12) by pulling the pusher reaction pipe (20) with the propulsion jack (18); and (e) a step of additionally installing a main pipe segment (13) in the segment assembly space (SA);(f) Afterwards, the steps of (c), (d), and (e) above are repeated sequentially until the application section of the infinite propulsion method is reached. In step (a), the propulsion pipe (14) is equipped with a reinforcing ring (141) installed at the tip of the propulsion pipe (14), and a ring plate (142) fixedly installed on the inner surface of the propulsion pipe (14) at a certain distance from the tip of the propulsion pipe (14) and having an outer diameter equal to the inner diameter of the propulsion pipe (14). The propulsion pipe pusher (16) is manufactured in the form of a pipe having an outer diameter equal to the inner diameter of the propulsion pipe (14). In step (e), the main pipe segment (13) is transported by being suspended from a hoist (17) supported by a rail (15) for transporting soil and segments installed on the upper inner surface of the propulsion main pipe (12) and the main pipe segment (13), or is transported by being mounted on a trolley (19) that is supported and moved on the lower inner surface of the propulsion main pipe (12) and the main pipe segment (13). A steel pipe infinite propulsion method characterized in that the segment (13) is installed by connecting a plurality of divided segments (131) through a hinge (133). Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 delete

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