CN110159280A - A kind of synchronous construction system and its construction method - Google Patents

Abstract

The present invention proposes a synchronous construction system and a construction method thereof. The system includes a shield body, and an extended propulsion oil cylinder is arranged in the shield body. The rod cavity of the oil cylinder is connected with the reversing valve assembly, the hydraulic control check valve I is connected with the reversing valve assembly, the reversing valve assembly is respectively connected with the excavation oil source I, the excavation oil source II, and the one-way valve II, and the one-way valve II is connected with the oil return end; the method includes the following steps: the propelling cylinder is supported by the assembled segment, and the propelling equipment is excavated, and the lengthening propelling cylinder at the segment to be assembled is retracted at the same time to provide space for the segment to be assembled, and then Carry out segment assembly; until the segment assembly is completed, the corresponding lengthening propulsion cylinder is extended to the segment to propel the equipment for excavation; repeat the above steps. The invention has the advantages that the segments are assembled without stopping the excavation of the shield machine, and the excavation efficiency of the shield machine is greatly improved.

Description

A kind of synchronous construction system and its construction method

technical field

The invention relates to the technical field of tunnel construction, in particular to a synchronous construction system and a construction method thereof.

Background technique

The shield tunneling machine is a large-scale construction equipment used in tunnel excavation. During the shield tunneling process, in order to maintain the stability of the surrounding rock after the shield tunneling machine tunnels, when the shield tunneling machine tunnels for a certain distance, the segments must be assembled. , when assembling segments, it is necessary to use the shield machine propulsion cylinder to tighten and stabilize the segmented segments that have been installed in place. Due to the limitation of the current hydraulic control system and the length of the propulsion cylinder, it is necessary to specifically stop the shield tunneling state, and then proceed to the tube It takes a long time to assemble the entire ring of segments. Based on a 3km tunnel, if the segment width is 2m, then the entire tunnel will be composed of 1,500 ring segments, and it will take 2.4 hours to excavate one ring. The excavation time is 3600 hours, assuming that the assembly part is 1 hour, and the assembly time of the whole 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.

Contents of the invention

The invention proposes a synchronous construction system and a construction method thereof, which solves the problem in the prior art that segment assembling restricts tunneling efficiency.

The technical solution of the present invention is achieved in the following way: a synchronous construction system, comprising a shield body, the shield body is provided with an extended propulsion cylinder, and the rodless cavity of the prolongation propulsion cylinder is connected with the hydraulic control check valve I and the oil return port respectively. Connection, the rod cavity of the extended propulsion cylinder is connected to the reversing valve assembly, the hydraulic control check valve I is connected to the reversing valve assembly, and the reversing valve assembly is respectively connected to the excavation oil source I, excavation oil source II, and check valve II , the one-way valve II is connected to the oil return port.

The reversing valve assembly includes a reversing valve I and a reversing valve II, the reversing valve I is respectively connected with the excavation oil source I, the excavation oil source II, and the reversing valve II, and the reversing valve II is respectively connected with the hydraulic control one-way Valve I, check valve II, rod cavity connection.

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.

Two of the extended propulsion cylinders are set as a group, and cylinder support shoes are connected between the ends of the two extended propulsion cylinders of each group.

The head and tail of the extended propelling oil cylinder are all fixed on the shield body through the oil cylinder fixing seat.

The rodless chamber is connected to the oil return port through a cartridge valve, and the cartridge valve is connected to the pilot valve.

The pilot valve is an electromagnetic ball valve.

The rodless chamber is connected to the oil return port through an unloading valve.

The unloading valve is an electromagnetic ball valve.

The rodless cavity is connected with the oil return port through the overflow valve.

A synchronous construction method, comprising the following steps: a. Extending the propelling cylinder with the segment already assembled as a support, driving the equipment to excavate, and at the same time retracting the propelling cylinder at the segment to be assembled to provide space for the segment to be assembled, and then proceeding Segment assembly; b. After the assembled segment is assembled, the corresponding lengthened propulsion cylinder is extended to the segment to propel the equipment excavation; c. Repeat steps a and b to realize the simultaneous construction of equipment excavation and segment assembly.

In step a, the excavation oil source I communicates with the rodless cavity of the extended propulsion cylinder for excavation through the reversing valve assembly and the hydraulic control check valve I to drive the elongation of the excavation propulsion cylinder, and the excavation oil source II passes through the reversing The valve assembly communicates with the rod cavity of the extended propulsion cylinder for assembly, and drives the extended propulsion cylinder for assembly to retract; in step b, the excavation oil source II passes through the reversing valve assembly, the hydraulic control check valve I and the corresponding extended propulsion cylinder. The rodless cavity of the oil cylinder is connected, and drives the corresponding lengthening propulsion cylinder to extend until it contacts the segment.

The reversing valve assembly includes a reversing valve I and a reversing valve II; in step a, the excavation oil source I passes through the reversing valve I, the reversing valve II, the hydraulic control check valve I and the rodless connection of the extended propulsion cylinder for excavation. The cavity is connected, and the extended propulsion cylinder for driving the excavation is extended, and the excavation oil source II is connected with the rod chamber of the extended propulsion cylinder for assembly through the reversing valve I and the reversing valve II, and the extended propulsion cylinder for driving the assembly is retracted; In step b, the excavation oil source II communicates with the rodless chamber of the corresponding extended propulsion cylinder through the reversing valve I, reversing valve II, and hydraulic control check valve I, and drives the corresponding extended propulsion cylinder to extend until it is connected to the segment touch.

The advantages of the present invention: provide two excavation oil sources, and equip each group of oil cylinders with an oil source switching device. Most of the oil cylinders are supported by the assembled segments to propel the excavation of the equipment, and the oil cylinders at the place to be assembled are retracted to make room for Segment assembly can be assembled without stopping the tunneling of the shield machine, which greatly improves the tunneling efficiency of the shield machine.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the installation structure drawing of the extended propulsion oil cylinder of the present invention.

Fig. 2 is a schematic diagram of the distribution of the extended propulsion cylinders of the present invention.

Fig. 3 is an expanded view of segment arrangement of the present invention.

Fig. 4 is a hydraulic principle diagram of the present invention.

Fig. 5 is a schematic diagram of the reversing valve assembly of the present invention.

In the figure: 1-Segment, 2-Extended propulsion cylinder, 3-Cylinder fixing seat, 4-Cylinder support shoe, 5-Shield body; P-Drilling oil source I, P1-Drilling oil source II, T-Oil return port , Y-drain end; 11-reversing valve I, 12-reversing valve II, 13-cartridge valve, 14-pilot valve, 15-hydraulic control check valve I, 16-relief valve, 17-unloading Charge valve, 18-check valve II.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figures 1 and 2, a synchronous construction system includes a shield body 5, and the circumference of the shield body 5 is uniformly provided with an extended propulsion cylinder 2, and the head and tail of the extended propulsion cylinder 2 are fixed on the shield body 5 through the cylinder fixing seat 3 Above, two extended propulsion cylinders 2 are set as a group, and the ends of the two extended propulsion cylinders 2 in each group are connected with cylinder support shoes 4, and when the cylinder support shoes 4 are extended, the cylinder support shoes 4 tighten the segment 1 to realize the support of the equipment excavation.

As shown in Figures 4 and 5, the extended propulsion cylinder 2 realizes the elongation and excavation of some cylinders and the retraction and assembly of some cylinders through the hydraulic control unit. The hydraulic control unit includes a reversing valve assembly, a cartridge valve 13, a pilot valve 14, a hydraulic Control check valve I 15, relief valve 16, unloading valve 17, check valve II 18, the reversing valve assembly includes reversing valve I 11 and reversing valve II 12, reversing valve I 11 is two-position three-way The 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.

The excavation oil source I P 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, and the reversing valve II 12 is respectively connected to the hydraulic control check valve I 15, check valve II 18. The rod cavity of the lengthened propulsion cylinder 2 is connected, the hydraulic control check valve I 15 is connected with the rodless cavity of the lengthened propulsion cylinder 2, and the rodless cavity of the lengthened propulsion cylinder 2 is respectively connected with the cartridge valve 13 and the overflow valve 16 , the unloading valve 17, the cartridge valve 13 is connected with the pilot valve 14, the pilot valve 14 is connected with the drain port Y, the cartridge valve 13, the overflow valve 16, the unloading valve 17, and the one-way valve II18 are respectively connected with the oil return port Terminal T connection.

As shown in Figures 3 to 5, a synchronous construction method includes the following steps:

aFor the excavation cylinder group, the right side of the reversing valve II 12 is powered on, the reversing valve I 11 is de-energized, and the excavation oil source I P is used, and the excavation oil source I P passes through the reversing valve I 11, the reversing valve II 12, the hydraulic control unit Directional valve I 15 communicates with the rodless chamber of the lengthened propulsion cylinder 2 for excavation, hydraulic oil is injected into the rodless chamber, and the rod chamber of the extended propulsion cylinder 2 for excavation passes through the reversing valve II 12, the one-way valve II18 and the return valve. The oil end T is connected, and the hydraulic oil is discharged from the rod cavity for oil return. At this time, the lengthened propulsion cylinder 2 used for driving the excavation is extended, and the lengthened propulsion cylinder 2 is supported by the assembled segments to propel the excavation of the equipment; for the assembled cylinder group, replace The direction valve I 11 is energized, and the excavation oil source II P1 is adopted, and the excavation oil source II P1 communicates with the rod cavity of the extended propulsion cylinder 2 for assembly through the reversing valve I 11 and the reversing valve II 12, and the hydraulic oil is injected into the rod 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. Hydraulically controlled one-way valve I15, reversing valve II12, and one-way valve II18 return oil, and drive the extended propelling cylinder 2 for assembly to retract to provide space for the segments to be assembled; then the segments are assembled.

b. After the assembled segments are assembled, the right side of the reversing valve II 12 is energized, and the excavation oil source II P1 passes through the reversing valve I11, the reversing valve II 12 and the corresponding extended propulsion cylinder 2 (that is, retracted in step a) cylinder), the hydraulic oil is injected into the rodless cavity, the cylinder extends, and the corresponding lengthened propulsion cylinder extends to the segment, and the reversing valve I 11 is powered off after the cylinder touches the segment that has been assembled , switch to the excavation oil source IP, and propel the equipment to excavation.

c Repeat steps a and b to realize simultaneous construction of equipment excavation and segment assembly.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. A synchronous construction system, including a shield body (5), characterized in that: the shield body (5) is provided with an extended propulsion cylinder (2), and the rodless cavity of the extended propulsion cylinder (2) is respectively connected to the liquid The control check valve I (15) is connected to the oil return port (T), the rod cavity of the extended propulsion cylinder (2) is connected to the reversing valve assembly, and the hydraulic control check valve I (15) is connected to the reversing valve assembly. The reversing valve assembly is respectively connected with the excavation oil source I (P), the excavation oil source II (P1), and the one-way valve II (18), and the one-way valve II (18) is connected with the oil return port (T). 2. The synchronous construction system according to claim 1, characterized in that: the reversing valve assembly includes a reversing valve I (11) and a reversing valve II (12), and the reversing valve I (11) is connected with The excavation oil source I (P), the excavation oil source II (P1), and the reversing valve II (12) are connected, and the reversing valve II (12) is respectively connected with the hydraulic control check valve I (15), the check valve II (18 ), with a rod cavity connection. 3. The synchronous construction system according to claim 1 or 2, characterized in that two of the lengthened propulsion cylinders (2) are set as a group, and the ends of the two lengthened propulsion cylinders (2) in each group are A cylinder support shoe (4) is attached. 4. The synchronous construction system according to claim 1 or 2, characterized in that: both the head and tail of the extended propulsion cylinder (2) are fixed on the shield body (5) through the cylinder fixing seat (3). 5. The synchronous construction system according to claim 1 or 2, characterized in that: the rodless chamber is connected to the oil return port (T) through a cartridge valve (13), and the cartridge valve (13) is connected to the pilot valve (14) CONNECTIONS. 6. The synchronous construction system according to claim 1 or 2, characterized in that: the rodless cavity is connected to the oil return port (T) through an unloading valve (17). 7. The synchronous construction system according to claim 1 or 2, characterized in that: the rodless chamber is connected to the oil return port (T) through an overflow valve (16). 8. A synchronous construction method, characterized in that, comprises the steps: a. The extended propulsion cylinder (2) is supported by the assembled segment to propel the equipment to excavate. At the same time, 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 assembled segment is completed, the corresponding extended propulsion cylinder (2) is extended to the segment to propel the equipment for excavation; c Repeat steps a and b to realize simultaneous construction of equipment excavation and segment assembly. 9. The synchronous construction method according to claim 8, characterized in that: in step a, the excavation oil source I (P) passes through the reversing valve assembly, the hydraulic control check valve I (15) and the extended propulsion cylinder for excavation The rodless cavity of (2) is connected to drive the extension of the extended propulsion cylinder (2) for excavation, and the excavation oil source II (P1) communicates with the rod cavity of the extended propulsion cylinder (2) for assembly through the reversing valve assembly. Drive the retraction of the lengthened propulsion cylinder (2) used for assembly; in step b, the excavation oil source II (P1) passes through the reversing valve assembly, the hydraulic control check valve I (15) and the corresponding lengthened propulsion cylinder (2). The rod cavity is connected to drive the corresponding extension cylinder (2) to extend until it contacts the segment. 10. The synchronous construction method according to claim 9, characterized in that: the reversing valve assembly includes reversing valve I (11) and reversing valve II (12); in step a, the excavation oil source I (P) passes through Reversing valve I (11), reversing valve II (12), and hydraulic control check valve I (15) communicate with the rodless chamber of the extended propulsion cylinder (2) for excavation, and drive the extended propulsion cylinder (2) for excavation. ) is extended, and the excavation oil source II (P1) communicates with the rod chamber of the extended propulsion cylinder (2) for assembly through the reversing valve I (11) and reversing valve II (12) to drive the extended propulsion cylinder for assembly (2) Retract; in step b, the excavation oil source II (P1) passes through the reversing valve I (11), the reversing valve II (12), the hydraulic control check valve I (15) and the corresponding extended propulsion cylinder ( 2) is connected to the rodless cavity, and drives the corresponding extended propulsion cylinder (2) to extend until it contacts the segment.