A synchronous construction system and construction method thereof

Abstract

The present invention proposes a synchronous construction system and a construction method thereof, the system comprises a shield body, an extended propulsion oil cylinder is arranged inside the shield body, the rodless chamber of the extended propulsion oil cylinder is respectively connected to the hydraulic control one-way valve I and the return oil end, the rod chamber of the extended propulsion oil cylinder is connected to the reversing valve assembly, the hydraulic control one-way valve I is connected to the reversing valve assembly, the reversing valve assembly is respectively connected to the excavation oil source I, the excavation oil source II, and the one-way valve II, and the one-way valve II is connected to the return oil end; the method comprises the following steps: the extended propulsion oil cylinder is supported by the assembled segments to propel the equipment to excavate, and at the same time, the extended propulsion oil cylinder at the segment to be assembled is retracted to provide space for the segment to be assembled, and then the segment is assembled; after the assembly of the segment to be assembled is completed, the corresponding extended propulsion oil cylinder is extended to the segment to propel the equipment to excavate; the above steps are repeated. The advantages of the present invention: the segment is assembled without stopping the excavation of the shield machine, which greatly improves the excavation efficiency of the shield machine.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and in particular to a synchronous construction system and a construction method thereof. Background Art

[0002] The shield machine is a large-scale construction equipment used for tunnel excavation. During the shield excavation process, in order to maintain the stability of the surrounding rock after the shield machine excavates, the segments must be assembled after the shield machine excavates a certain distance. When assembling the segments, the shield machine's thrust cylinder is needed to tighten and stabilize the installed segments. Due to the current hydraulic control system and the length of the thrust cylinder, it is necessary to stop the shield excavation state and then assemble the segments. It takes a long time to assemble the entire ring of segments. Calculated based on a 3km tunnel, if the segment width is 2m, then the entire tunnel will be composed of 1500 rings of segments, 2.4 hours to excavate one ring, the pure excavation time is 3600 hours, and it is assumed that one ring is assembled in 1 hour. The time to assemble the entire segment is 1500 hours. Then the assembly time occupies 29% of the tunnel penetration time, which seriously restricts the excavation efficiency of the shield machine. Summary of the invention

[0003] The present invention provides a synchronous construction system and a construction method thereof, which solves the problem that segment assembly in the prior art restricts excavation efficiency.

[0004] The technical solution of the present invention is achieved as follows: a synchronous construction system includes a shield body, wherein an extended propulsion cylinder is arranged in the shield body, the rodless chamber of the extended propulsion cylinder is respectively connected to the hydraulically controlled one-way valve I and the return oil end, the rod chamber of the extended propulsion cylinder is connected to the reversing valve assembly, the hydraulically controlled one-way valve I is connected to the reversing valve assembly, the reversing valve assembly is respectively connected to the excavation oil source I, the excavation oil source II, and the one-way valve II, and the one-way valve II is connected to the return oil end.

[0005] The reversing valve assembly includes a reversing valve I and a reversing valve II. The reversing valve I is respectively connected to the excavation oil source I, the excavation oil source II, and the reversing valve II. The reversing valve II is respectively connected to the hydraulically controlled one-way valve I, the one-way valve II, and the rod chamber.

[0006] The reversing valve I is a two-position three-way electromagnetic reversing valve, and the reversing valve II is a three-position four-way electromagnetic reversing valve.

[0007] The two extended propulsion oil cylinders are arranged as a group, and oil cylinder support shoes are connected between the ends of the two extended propulsion oil cylinders in each group.

[0008] The head and tail of the lengthened propulsion oil cylinder are both fixed on the shield body through oil cylinder fixing seats.

[0009] The rodless chamber is connected to the oil return end through a cartridge valve, and the cartridge valve is connected to the pilot valve.

[0010] The pilot valve is an electromagnetic ball valve.

[0011] The rodless chamber is connected with the oil return end through an unloading valve.

[0012] The unloading valve is an electromagnetic ball valve.

[0013] The rodless chamber is connected with the oil return end through a relief valve.

[0014] A synchronous construction method comprises the following steps: a. extending the propulsion cylinder to support the assembled pipe segments and propel the equipment forward, while the extended propulsion cylinder at the pipe segments to be assembled is retracted to provide space for the pipe segments to be assembled, and then the pipe segments are assembled; b. after the pipe segments to be assembled are assembled, the corresponding extended propulsion cylinder is extended to the pipe segments to propel the equipment forward; c. repeating steps a and b to achieve synchronous construction of equipment excavation and pipe segment assembly.

[0015] In step a, the excavation oil source I is connected with the rodless cavity of the extended propulsion cylinder for excavation through the reversing valve assembly and the hydraulically controlled one-way valve I, driving the extended propulsion cylinder for excavation to extend, and the excavation oil source II is connected with the rod cavity of the extended propulsion cylinder for assembly through the reversing valve assembly, driving the extended propulsion cylinder for assembly to retract; in step b, the excavation oil source II is connected with the rodless cavity of the corresponding extended propulsion cylinder through the reversing valve assembly and the hydraulically controlled one-way valve I, driving the corresponding extended propulsion cylinder to extend until it contacts the pipe segment.

[0016] The reversing valve assembly includes a reversing valve I and a reversing valve II; in step a, the excavation oil source I is connected to the rodless cavity of the extended propulsion cylinder for excavation through the reversing valve I, the reversing valve II, and the hydraulically controlled one-way valve I, driving the extended propulsion cylinder for excavation to extend, and the excavation oil source II is connected to the rod cavity of the extended propulsion cylinder for assembly through the reversing valve I and the reversing valve II, driving the extended propulsion cylinder for assembly to retract; in step b, the excavation oil source II is connected to the rodless cavity of the corresponding extended propulsion cylinder through the reversing valve I, the reversing valve II, and the hydraulically controlled one-way valve I, driving the corresponding extended propulsion cylinder to extend until it contacts the pipe segment.

[0017] The advantages of the present invention are as follows: two oil sources for tunneling are provided, and each group of oil cylinders is equipped with an oil source switching device. Most of the oil cylinders are supported by assembled segments to advance the equipment. The oil cylinders at the assembly locations are retracted to make room for segment assembly. The segment assembly can be carried out without stopping the tunneling of the shield machine, thereby greatly improving the tunneling efficiency of the shield machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a structural diagram of the installation of the lengthened propulsion cylinder of the present invention.

[0020] Figure 2 This is a schematic diagram of the distribution of the lengthened propulsion cylinder of the present invention.

[0021] Figure 3 This is an expanded view of the segment arrangement of the present invention.

[0022] Figure 4 It is the hydraulic principle diagram of the present invention.

[0023] Figure 5 It is the principle diagram of the reversing valve assembly of the present invention.

[0024] In the figure: 1- pipe segment, 2- extended thrust cylinder, 3- cylinder fixing seat, 4- cylinder support shoe, 5- shield body; P- excavation oil source I, P1- excavation oil source II, T- oil return end, Y- oil drain end; 11- reversing valve I, 12- reversing valve II, 13- cartridge valve, 14- pilot valve, 15- hydraulically controlled non-return valve I, 16- overflow valve, 17- unloading valve, 18- non-return valve II. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1 and 2 As shown, a synchronous construction system includes a shield body 5, and extended propulsion cylinders 2 are evenly arranged around the circumference of the shield body 5. The head and tail of the extended propulsion cylinders 2 are fixed to the shield body 5 through cylinder fixing seats 3. Two extended propulsion cylinders 2 are set as a group, and cylinder support shoes 4 are connected between the ends of the two extended propulsion cylinders 2 in each group. When the cylinder support shoes 4 are extended, they press against the pipe segments 1 to achieve supported excavation of the equipment.

[0027] like Figure 4 and 5As shown, the extended propulsion cylinder 2 realizes the extension and excavation of part of the cylinder and the retraction and assembly of part of the cylinder through the hydraulic control unit. The hydraulic control unit includes a reversing valve assembly, a cartridge valve 13, a pilot valve 14, a hydraulically controlled one-way valve I 15, a relief valve 16, a unloading valve 17, and a one-way valve II 18. The reversing valve assembly includes a reversing valve I 11 and a reversing valve II 12. The reversing valve I 11 is a two-position three-way electromagnetic reversing valve, the reversing valve II 12 is a three-position four-way electromagnetic reversing valve, the pilot valve 14 is an electromagnetic ball valve, and the unloading valve 17 is an electromagnetic ball valve.

[0028] The excavation oil source IP and the excavation oil source II P1 are respectively connected to the reversing valve I 11, the reversing valve I 11 is connected to the reversing valve II 12, the reversing valve II 12 is respectively connected to the hydraulically controlled one-way valve I 15, the one-way valve II 18 and the rod chamber of the extended propulsion cylinder 2, the hydraulically controlled one-way valve I 15 is connected to the rodless chamber of the extended propulsion cylinder 2, the rodless chamber of the extended propulsion cylinder 2 is respectively connected to the cartridge valve 13, the relief valve 16 and the unloading valve 17, the cartridge valve 13 is connected to the pilot valve 14, the pilot valve 14 is connected to the oil drain end Y, the cartridge valve 13, the relief valve 16, the unloading valve 17 and the one-way valve II18 are respectively connected to the oil return end T.

[0029] like Figures 3 to 5 As shown, a synchronous construction method comprises the following steps:

[0030] aFor the tunneling oil cylinder group, the right side of the reversing valve II 12 is energized, the reversing valve I 11 is de-energized, and the tunneling oil source IP is used. The tunneling oil source IP is connected to the rodless chamber of the extended propulsion oil cylinder 2 for tunneling through the reversing valve I 11, the reversing valve II 12, and the hydraulically controlled one-way valve I 15, and the hydraulic oil is injected into the rodless chamber. The rod chamber of the extended propulsion oil cylinder 2 for tunneling is connected to the return oil end T through the reversing valve II 12 and the one-way valve II 18, and the hydraulic oil is discharged from the rod chamber for oil return. At this time, the extended propulsion oil cylinder 2 for tunneling is driven to extend, and the extended propulsion oil cylinder 2 is supported by the assembled pipe segment to propel the equipment for tunneling; for the assembled cylinder group, the reversing valve I 11 is energized, and the tunneling oil source II P1 is used. The tunneling oil source II P1 is connected to the rodless chamber of the extended propulsion oil cylinder 2 for tunneling through the reversing valve I 11 and the one-way valve II 18. 12 is connected with the rod chamber of the extended propulsion cylinder 2 for assembly, and the hydraulic oil is injected into the rod chamber. At this time, the rodless chamber is first unloaded through the unloading valve 17, and then the pilot valve 14 and the left side of the reversing valve II 12 are energized. The hydraulic oil in the rodless chamber returns through the cartridge valve 13 in one way and returns through the hydraulically controlled one-way valve I15, the reversing valve II 12 and the one-way valve II 18 in the other way, driving the extended propulsion cylinder 2 for assembly to retract and provide space for the pipe segments to be assembled; then the pipe segments are assembled.

[0031] b After the assembly of the segments to be assembled is completed, the right side of the reversing valve II 12 is energized, and the excavation oil source II P1 is connected with the rodless cavity of the corresponding extended propulsion cylinder 2 (i.e. the cylinder retracted in step a) through the reversing valve I11 and the reversing valve II 12. The hydraulic oil is injected into the rodless cavity, the cylinder extends, and the corresponding extended propulsion cylinder extends to the segment. After the cylinder contacts the assembled segment, the reversing valve I 11 is de-energized and switched to the excavation oil source IP to advance the equipment.

[0032] c. Repeat steps a and b to achieve simultaneous construction of equipment excavation and segment assembly.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A synchronous construction system, comprising a shield (5), characterized in that: The shield body (5) is provided with an extended propulsion cylinder (2), the rodless chamber of the extended propulsion cylinder (2) is respectively connected to the hydraulically controlled non-return valve I (15) and the oil return end (T), the rod chamber of the extended propulsion cylinder (2) is connected to the reversing valve assembly, the hydraulically controlled non-return valve I (15) is connected to the reversing valve assembly, the reversing valve assembly is respectively connected to the excavation oil source I (P), the excavation oil source II (P1), and the non-return valve II (18), and the non-return valve II (18) is connected to the oil return end (T); The reversing valve assembly comprises a reversing valve I (11) and a reversing valve II (12); the reversing valve I (11) is respectively connected to an excavation oil source I (P), an excavation oil source II (P1), and the reversing valve II (12); the reversing valve II (12) is respectively connected to a hydraulically controlled check valve I (15), a check valve II (18), and a rod chamber; The two extended propulsion cylinders (2) are arranged in a group, and a cylinder support shoe (4) is connected between the ends of the two extended propulsion cylinders (2) in each group; The extended thrust cylinder uses the assembled segments as support to push the equipment forward. At the same time, the extended thrust cylinder at the segments to be assembled retracts to provide space for the segments to be assembled, and then the segments are assembled. After the segments to be assembled are completed, the corresponding extended thrust cylinders are extended to the segments to push the equipment forward.

2. The synchronous construction system according to claim 1, characterized in that: The head and tail of the extended propulsion cylinder (2) are fixed to the shield body (5) via cylinder fixing seats (3).

3. The synchronous construction system according to claim 1, characterized in that: The rodless chamber is connected to the oil return end (T) via a cartridge valve (13), and the cartridge valve (13) is connected to a pilot valve (14).

4. The synchronous construction system according to claim 1, characterized in that: The rodless chamber is connected to the oil return end (T) via an unloading valve (17).

5. The synchronous construction system according to claim 1, characterized in that: The rodless chamber is connected to the oil return end (T) via a relief valve (16).

6. A synchronous construction method, characterized in that: The method comprises the synchronous construction system as claimed in any one of claims 1 to 5 and the following steps: a. The extended propulsion cylinder (2) uses the assembled segments as support to propel the equipment forward, while the extended propulsion cylinder (2) at the segment to be assembled is retracted to provide space for the segment to be assembled, and then the segment is assembled; b. After the assembly of the segments to be assembled is completed, the corresponding extended propulsion cylinder (2) is extended to the segments to propel the equipment forward; c. Repeat steps a and b to achieve simultaneous construction of equipment excavation and segment assembly.

7. The synchronous construction method according to claim 6, characterized in that: In step a, the excavation oil source I (P) is connected to the rodless cavity of the extended propulsion cylinder (2) for excavation through the reversing valve assembly and the hydraulically controlled non-return valve I (15), thereby driving the extended propulsion cylinder (2) for excavation to extend, and the excavation oil source II (P1) is connected to the rod cavity of the extended propulsion cylinder (2) for assembly through the reversing valve assembly, thereby driving the extended propulsion cylinder (2) for assembly to retract; in step b, the excavation oil source II (P1) is connected to the rodless cavity of the corresponding extended propulsion cylinder (2) through the reversing valve assembly and the hydraulically controlled non-return valve I (15), thereby driving the corresponding extended propulsion cylinder (2) to extend until it contacts the pipe segment.

8. The synchronous construction method according to claim 7, characterized in that: The reversing valve assembly comprises a reversing valve I (11) and a reversing valve II (12); in step a, the excavation oil source I (P) is connected to the rodless chamber of the extended propulsion cylinder (2) for excavation through the reversing valve I (11), the reversing valve II (12) and the hydraulically controlled non-return valve I (15), thereby driving the extended propulsion cylinder (2) for excavation to extend; the excavation oil source II (P1) is connected to the rod chamber of the extended propulsion cylinder (2) for assembly through the reversing valve I (11) and the reversing valve II (12), thereby driving the extended propulsion cylinder (2) for assembly to retract; in step b, the excavation oil source II (P1) is connected to the rodless chamber of the corresponding extended propulsion cylinder (2) through the reversing valve I (11), the reversing valve II (12) and the hydraulically controlled non-return valve I (15), thereby driving the corresponding extended propulsion cylinder (2) to extend until it contacts the pipe segment.

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