Tunnel pipe-jacking drainage method

Abstract

The invention discloses a tunnel pipe jacking drainage method. The method comprises the steps that S1, a pipe jacking machine is used for upwards and obliquely constructing a jacking pipe from a tunnel face on one side of a tunnel to a tunnel face on the other side of the tunnel; the area between the two sides of the tunnel is a water-rich area, the jacking pipe is composed of a plurality of jacking pipe rings, and the jacking pipe rings are steel pipes; s2, a drilling machine is installed in the jacking pipe, a main drilling rod is installed on the drilling machine, and a main drainage hole is vertically and upwards drilled from the top of the jacking pipe through the main drilling rod on the drilling machine till the main drainage hole extends to the position above the tunnel reinforcing ring by a certain distance; a plurality of main drainage holes are formed in the front-back direction of the jacking pipe at intervals; s3, the main drill rod is dismantled, an auxiliary drill rod is installed on the drilling machine, and an auxiliary drainage hole is drilled in the side portion of the main drainage hole through the auxiliary drill rod; the tops of the auxiliary drainage holes are located on the outer sides of the bottoms of the auxiliary drainage holes. The method has the advantages that drainage of the tunnel is achieved by constructing the top pipe and the drainage holes, and subsequent excavation of the tunnel is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnels, and in particular to a tunnel pipe jacking drainage method. Background Art

[0002] A tunnel refers to an engineering structure buried in the ground, which is a form of human utilization of underground space. When excavating a tunnel, two-way construction is usually adopted to shorten the construction period and improve efficiency. Especially at the confluence of excavations, attention should be paid to the soil environment here. When the water content of the soil here is relatively high, drainage operations need to be carried out first before excavation.

[0003] Therefore, a tunnel pipe jacking drainage method is needed, which can drain the tunnel to ensure the safe and rapid progress of construction. Summary of the Invention

[0004] The purpose of the present invention is to provide a tunnel pipe jacking drainage method according to the deficiencies of the above-mentioned prior art. This method realizes the drainage of the tunnel by constructing pipe jacking and drainage holes, facilitating the subsequent excavation of the tunnel.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A tunnel pipe jacking drainage method, the method comprising:

[0007] S1: Using a pipe jacking machine to construct the pipe jacking from the face of one side of the tunnel obliquely upward to the face of the other side of the tunnel;

[0008] Wherein, the area between the two sides of the tunnel is a water-rich area, the pipe jacking is composed of a number of pipe jacking rings, and the pipe jacking rings are made of steel pipes;

[0009] S2: Installing a drilling rig inside the pipe jacking, and installing a main drill pipe on the drilling rig. Using the main drill pipe on the drilling rig to drill a main drainage hole vertically upward from the top of the pipe jacking until the main drainage hole extends a certain distance above the tunnel reinforcement circle;

[0010] Wherein, a plurality of main drainage holes are arranged at intervals along the front and back directions of the pipe jacking;

[0011] S3: Removing the main drill pipe, and installing a sub-drill pipe on the drilling rig. Using the sub-drill pipe to drill sub-drainage holes on the side of the main drainage hole;

[0012] Wherein, the sub-drainage holes are inclined, and the top of the sub-drainage hole is located outside the bottom of the sub-drainage hole.

[0013] A first hydraulic telescopic device is connected between the jacking pipe rings. A plurality of the first hydraulic telescopic devices are arranged circumferentially along the jacking pipe rings. A first hydraulic telescopic device fixing ring is arranged inside the end of the jacking pipe ring. The base of the first hydraulic telescopic device is installed on the first hydraulic telescopic device fixing ring of one of the jacking pipe rings, and the telescopic rod is connected to the first hydraulic telescopic device fixing ring of another adjacent jacking pipe ring.

[0014] The jacking pipe rings are fixed by flanges.

[0015] The drilling rig includes a second hydraulic telescopic device, a first fixing seat, a first rotating motor and a first mounting seat. The telescopic rod of the second hydraulic telescopic device is connected to the first rotating motor through the first fixing seat. The output shaft of the first rotating motor is connected to the first mounting seat. The main drill rod is installed on the first mounting seat through a main drill rod fixing device. An internal threaded pipe is provided on the main drill rod fixing device. The main drill rod includes a spiral rod and an extension rod. An external threaded pipe is provided at the bottom end of the spiral rod. The two ends of the extension rod are respectively provided with the internal threaded pipe and the external threaded pipe. The internal threaded pipe and the external threaded pipe are matched with each other. A plurality of pairs of mounting holes for placing cylindrical clamping members are respectively provided along the radial direction of the internal threaded pipe and the external threaded pipe. The plurality of pairs of mounting holes are arranged axially along the internal threaded pipe and the external threaded pipe. The positions, quantities and sizes of the mounting holes on the internal threaded pipe respectively correspond to the positions, quantities and sizes of the mounting holes on the external threaded pipe.

[0016] The auxiliary drill rod is installed on the first mounting seat through an auxiliary drill rod fixing device. The auxiliary drill rod includes a pipe body and a drilling device installed on the pipe body. The pipe body is composed of a plurality of pipe body components. A plurality of the drilling devices are arranged circumferentially along the pipe body. The drilling device includes a third hydraulic telescopic device, a fourth hydraulic telescopic device, a second fixing seat, a second rotating motor, a second mounting seat and a spiral rod body. The third hydraulic telescopic device is arranged radially along the pipe body. The base of the third hydraulic telescopic device is installed inside the pipe body, and the telescopic rod passes through the pipe body and is hinged to the base of the fourth hydraulic telescopic device. The bottom of the base of the fourth hydraulic telescopic device is hinged to the outside of the pipe body, and the telescopic rod is connected to the second rotating motor through the second fixing seat. The output shaft of the second rotating motor is connected to the second mounting seat. The spiral rod body is installed on the second mounting seat through a spiral rod body fixing device.

[0017] The bottom of the main drainage hole is connected to a drainage pipe. The drainage pipe is arranged circumferentially along the inner wall of the jacking pipe. The bottom of the drainage pipe is located at the bottom of the inner wall of the jacking pipe.

[0018] The advantages of the present invention are as follows: By constructing the jacking pipe and the drainage holes, the drainage of the tunnel is realized, which is convenient for the subsequent excavation of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the tunnel of the present invention;

[0020] Figure 2 It is an installation schematic diagram of the drill rig of the present invention;

[0021] Figure 3 It is an installation schematic diagram of the drainage pipe of the present invention;

[0022] Figure 4 It is a schematic diagram of the first hydraulic telescopic device of the present invention in a contracted state;

[0023] Figure 5 It is a schematic diagram of the first hydraulic telescopic device of the present invention in an extended state;

[0024] Figure 6 It is a structural schematic diagram of the drill rig of the present invention;

[0025] Figure 7 It is an installation schematic diagram of the cylindrical fastener of the present invention;

[0026] Figure 8 It is a layout schematic diagram of the installation holes of the present invention;

[0027] Figure 9 It is a plan view of the third hydraulic telescopic device of the present invention in a contracted state;

[0028] Figure 10 It is an elevation view of the third hydraulic telescopic device of the present invention in a contracted state;

[0029] Figure 11 It is a plan view of the third hydraulic telescopic device of the present invention in an extended state;

[0030] Figure 12 It is an elevation view of the third hydraulic telescopic device of the present invention in an extended state;

[0031] As Figures 1 to 12 shown, the markings in the figure are respectively represented as:

[0032] Tunnel 1, Jacking Pipe 2, Jacking Pipe Ring 21, First Hydraulic Telescopic Device 22, First Hydraulic Telescopic Device Fixed Ring 23, Flange 24, Drill Rig 3, Second Hydraulic Telescopic Device 31, First Fixed Seat 32, First Rotating Motor 33, First Mounting Seat 34, Main Drill Pipe Fixing Device 35, Main Drill Pipe 4, Sub Drill Pipe 5, Pipe Body 51, Drilling Device 52, Third Hydraulic Telescopic Device 521, Fourth Hydraulic Telescopic Device 522, Second Fixed Seat 523, Second Rotating Motor 524, Second Mounting Seat 525, Screw Rod Body Fixing Device 526, Fixed Frame 527, Main Drainage Hole 6, Auxiliary Drainage Hole 7, Internal Threaded Pipe 8, External Threaded Pipe 9, Installation Hole 10, Cylindrical Fastener 11, Drainage Pipe 12;

[0033] The jacking direction of the pipe jacking a and the water flow direction in the pipe jacking b. Specific implementation manners

[0034] The features of the present invention and other related features will be further described in detail below with reference to the accompanying drawings through embodiments for the understanding of those skilled in the same industry:

[0035] Embodiment: As Figures 1 to 12 shown, this embodiment relates to a method for draining water in tunnel pipe jacking, and the method mainly includes the following steps:

[0036] S1: Use a pipe jacking machine to construct the pipe jacking 2 obliquely upward from the heading face on one side of the tunnel 1 to the heading face on the other side of the tunnel 1 (see the pipe jacking direction a in Figure 1 ).

[0037] Among them, the area between the two sides of the tunnel 1 is a water-rich area, and drainage operations need to be carried out before excavation. The pipe jacking 2 is composed of a number of pipe jacking rings 21. The pipe jacking rings 21 are made of steel pipes. The reason for not using a concrete structure is that the pipe jacking rings 21 need to be perforated later, and the physical properties of the concrete pipe jacking rings 21 are easily affected after perforation.

[0038] A first hydraulic telescopic device 22 is connected between the pipe jacking rings 21. A plurality of first hydraulic telescopic devices 22 are arranged circumferentially along the pipe jacking rings 21. A first hydraulic telescopic device fixing ring 23 is provided inside the end of the pipe jacking ring 21. The base of the first hydraulic telescopic device 22 is installed on the first hydraulic telescopic device fixing ring 23 of one pipe jacking ring 21, and the telescopic rod is connected to the first hydraulic telescopic device fixing ring 23 of another adjacent pipe jacking ring 21. When the power of the pipe jacking machine is insufficient (unable to push the pipe jacking ring 21 forward), the first hydraulic telescopic device 22 can supplement the power (push the pipe jacking ring 21 forward). The pipe jacking rings 21 are fixed through flanges 24 to form an integral body.

[0039] S2: Install a drilling rig 3 inside the pipe jacking 2, and install a main drill rod 4 on the drilling rig 3. Use the main drill rod 4 on the drilling rig 3 to vertically drill a main drainage hole 6 upward from the top of the pipe jacking 2 until the main drainage hole 6 extends a certain distance above the tunnel reinforcement ring.

[0040] Among them, a plurality of main drainage holes 6 are arranged at intervals in the front-back direction of the jacking pipe 2, and the main drainage holes 6 are used for drainage. The drilling rig 3 includes a second hydraulic telescopic device 31, a first fixed seat 32, a first rotating motor 33 and a first mounting seat 34. The telescopic rod of the second hydraulic telescopic device 31 is connected to the first rotating motor 33 through the first fixed seat 32, and the output shaft of the first rotating motor 33 is connected to the first mounting seat 34. The second hydraulic telescopic device 31 drives the first fixed seat 32 and the first rotating motor 33 to move up and down, and the first rotating motor 33 drives the first mounting seat 34 to rotate. The main drill pipe 4 is installed on the first mounting seat 34 through a main drill pipe fixing device 35, and an internal threaded pipe 8 is provided on the main drill pipe fixing device 35. The main drill pipe 4 includes a spiral drill rod and an extension rod. The bottom end of the spiral drill rod is provided with an external threaded pipe 9, and both ends of the extension rod are respectively provided with an internal threaded pipe 8 and an external threaded pipe 9. The internal threaded pipe 8 is matched with the external threaded pipe 9. Specifically, the spiral drill rod can be directly threadedly connected to the main drill pipe fixing device 35, or the spiral drill rod can be indirectly connected to the main drill pipe fixing device 35 through the extension rod. The extension rod is used to lengthen the spiral drill rod, so as to realize the drilling of the main drainage hole 6. The internal threaded pipe 8 and the external threaded pipe 9 are respectively provided with a plurality of pairs of mounting holes 10 for placing cylindrical clamping members 11 along their radial directions. The plurality of pairs of mounting holes 10 are arranged along the axial directions of the internal threaded pipe 8 and the external threaded pipe 9. The positions, numbers and sizes of the mounting holes 10 on the internal threaded pipe 8 respectively correspond to the positions, numbers and sizes of the mounting holes 10 on the external threaded pipe 9. When the internal threaded pipe 8 and the external threaded pipe 9 are matched, the mounting holes 10 of the internal threaded pipe 8 and the external threaded pipe 9 are arranged opposite to each other, and the cylindrical clamping members 11 are inserted into the mounting holes 10 of the internal threaded pipe 8 and the external threaded pipe 9, realizing the fixation between the internal threaded pipe 8 and the external threaded pipe 9 (preventing rotation between the internal threaded pipe 8 and the external threaded pipe 9).

[0041] S3: Remove the main drill pipe 4, install the auxiliary drill pipe 5 on the drilling rig 3, and use the auxiliary drill pipe 5 to drill the auxiliary drainage hole 7 on the side of the main drainage hole 6.

[0042] Among them, the auxiliary drainage hole 7 is inclined, the top of the auxiliary drainage hole 7 is located outside the bottom of the auxiliary drainage hole 7, and a fork-shaped drainage hole is formed between the main drainage hole 6 and the auxiliary drainage hole 7. The main drainage hole 6 is used for drainage, and the auxiliary drainage hole 7 increases the drainage channel of the main drainage hole 6, further improving the drainage efficiency.

[0043] The auxiliary drill pipe 5 is installed on the first mounting seat 34 through the auxiliary drill pipe fixing device. The structure of the auxiliary drill pipe fixing device is the same as that of the main drill pipe fixing device 35, only the dimensions are different, so it will not be elaborated here. The auxiliary drill pipe 5 includes a pipe body 51 and a drilling device 52 installed on the pipe body 51. The pipe body 51 is composed of several pipe body components. The connection method (thread connection) and the fixing method (fixed by using a cylindrical clamping part 11) between the pipe body components and between the pipe body components and the auxiliary drill pipe fixing device are the same as those between the main drill pipe 4 and the main drill pipe fixing device 35, so it will not be elaborated here. A plurality of drilling devices 52 are arranged circumferentially along the pipe body 51. The drilling device 52 includes a third hydraulic telescopic device 521, a fourth hydraulic telescopic device 522, a second fixing seat 523, a second rotating motor 524, a second mounting seat 525 and a screw rod body. The third hydraulic telescopic device 521 is arranged radially along the pipe body 51 (4 are provided in this embodiment). The base of the third hydraulic telescopic device 521 is installed inside the pipe body 51 and connected to the fixing frame 527. The telescopic rod passes through the pipe body 51 and is hinged to the base of the fourth hydraulic telescopic device 522. The fixing frame 527 is connected to the inner wall of the pipe body 51. The bottom of the base of the fourth hydraulic telescopic device 522 is hinged to the outside of the pipe body 51. The telescopic rod is connected to the second rotating motor 524 through the second fixing seat 523. The output shaft of the second rotating motor 524 is connected to the second mounting seat 525. The third hydraulic telescopic device 521 drives the fourth hydraulic telescopic device 522 to rotate, so as to realize the adjustment of the opening angle of the water discharge auxiliary hole 7. The fourth hydraulic telescopic device 522 drives the second fixing seat 523 and the second rotating motor 524 to move up and down. The second rotating motor 524 drives the second mounting seat 525 and the screw rod body to rotate for drilling the water discharge auxiliary hole 7. The screw rod body is installed on the second mounting seat 525 through the screw rod body fixing device 526. The structure of the screw rod body fixing device 526 is the same as that of the main drill pipe fixing device 35, only the dimensions are different, so it will not be elaborated here. The connection method (thread connection) and the fixing method (fixed by using a cylindrical clamping part 11) between the screw rod body and the screw rod body fixing device 526 are the same as those between the main drill pipe 4 and the main drill pipe fixing device 35, so it will not be elaborated here.

[0044] The bottom of the main water discharge hole 6 is connected to the drainage pipe 12. The drainage pipe 12 is arranged circumferentially along the inner wall of the jacking pipe 2. The bottom of the drainage pipe 12 is located at the bottom of the inner wall of the jacking pipe 2, which is convenient for water discharge.

[0045] In this embodiment, water enters the main water discharge hole 6 and the auxiliary water discharge hole 7, and is discharged from the bottom of the main water discharge hole 6. Then the water enters the jacking pipe 2 through the drainage pipe 12, and finally the water is discharged downward along the jacking pipe 2 (see Figure 1 the water flow direction b) in the jacking pipe).

[0046] The beneficial technical effects of this embodiment are as follows: By constructing the jacking pipe and the drainage holes, the drainage of the tunnel is realized, which facilitates the subsequent excavation of the tunnel.

[0047] Although the above embodiments have detailed the concept and embodiments of the object of the present invention with reference to the accompanying drawings, those of ordinary skill in the art can recognize that various improvements and transformations can still be made to the present invention without departing from the scope defined by the claims. Therefore, they will not be elaborated one by one here.

Claims

1. A tunnel jacking drainage method, characterized in that The method comprises: S1: Using a pipe jacking machine to tilt the pipe jacking upward from the tunnel face on one side of the tunnel to the tunnel face on the other side of the tunnel; Wherein, the area between the two sides of the tunnel is a water-rich area, and the jacking pipe is composed of a plurality of jacking pipe rings, and the jacking pipe rings are made of steel pipes; S2: installing a drilling rig inside the jacking pipe, installing a main drill rod on the drilling rig, and using the main drill rod on the drilling rig to vertically drill a main drainage hole from the top of the jacking pipe upwards until the main drainage hole extends to a certain distance above the tunnel reinforcement ring; Wherein, a plurality of main drainage holes are arranged at intervals along the front-to-back direction of the top pipe; S3: removing the main drill rod, installing an auxiliary drill rod on the drilling rig, and using the auxiliary drill rod to drill an auxiliary drainage hole on the side of the main drainage hole; Wherein, the auxiliary water drainage hole is arranged obliquely, and the top of the auxiliary water drainage hole is located outside the bottom of the auxiliary water drainage hole.

2. A tunnel jacking drainage method as claimed in claim 1, characterized in that A first hydraulic telescopic device is connected between the top pipe rings, and a plurality of the first hydraulic telescopic devices are arranged along the circumferential direction of the top pipe ring. A first hydraulic telescopic device fixing ring is provided on the inner side of the end of the top pipe ring. The base of the first hydraulic telescopic device is installed on the first hydraulic telescopic device fixing ring of one of the top pipe rings, and the telescopic rod is connected to the first hydraulic telescopic device fixing ring of another adjacent top pipe ring.

3. A tunnel jacking drainage method as claimed in claim 1, characterized in that The top pipe rings are fixed by flanges.

4. A tunnel jacking drainage method as claimed in claim 1, characterized in that The drilling rig includes a second hydraulic telescopic device, a first fixed seat, a first rotating motor and a first mounting seat, the telescopic rod of the second hydraulic telescopic device is connected to the first rotating motor through the first fixed seat, the output shaft of the first rotating motor is connected to the first mounting seat, the main drill rod is installed on the first mounting seat through the main drill rod fixing device, and the main drill rod fixing device is provided with an internal threaded tube; the main drill rod includes a spiral rotating rod and an extension rod, the bottom end of the spiral rotating rod is provided with an external threaded tube, and the two ends of the extension rod are respectively provided with the internal threaded tube and the external threaded tube, and the internal threaded tube cooperates with the external threaded tube; the internal threaded tube and the external threaded tube are respectively provided with a plurality of pairs of mounting holes for placing cylindrical clips along their radial directions, and the plurality of pairs of mounting holes are arranged along the axial directions of the internal threaded tube and the external threaded tube, and the positions, quantity and sizes of the mounting holes on the internal threaded tube correspond to the positions, quantity and sizes of the mounting holes on the external threaded tube.

5. A tunnel jacking drainage method as claimed in claim 4, characterized in that The auxiliary drill rod is installed on the first mounting seat through an auxiliary drill rod fixing device, the auxiliary drill rod includes a pipe body and a drilling device installed on the pipe body, the pipe body is composed of a plurality of pipe body assemblies, and a plurality of drilling devices are arranged along the circumference of the pipe body, the drilling device includes a third hydraulic telescopic device, a fourth hydraulic telescopic device, a second fixing seat, a second rotating motor, a second mounting seat and a spiral rod body, the third hydraulic telescopic device is arranged radially along the pipe body, the base of the third hydraulic telescopic device is installed in the pipe body, the telescopic rod passes through the pipe body and is hinged to the base of the fourth hydraulic telescopic device, the bottom of the base of the fourth hydraulic telescopic device is hinged to the outside of the pipe body, the telescopic rod is connected to the second rotating motor through the second fixing seat, the output shaft of the second rotating motor is connected to the second mounting seat, and the spiral rod body is installed on the second mounting seat through a spiral rod body fixing device.

6. A tunnel jacking drainage method as claimed in claim 1, characterized in that The bottom of the main drainage hole is connected to the drainage pipe, the drainage pipe is arranged circumferentially along the inner wall of the top pipe, and the bottom of the drainage pipe is located at the bottom of the inner wall of the top pipe.

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