CN112360477A

CN112360477A - Tunneling equipment for tunnel communication channel

Info

Publication number: CN112360477A
Application number: CN202011121562.3A
Authority: CN
Inventors: 李向红; 刘剑; 蔡荣; 姚平; 刘学; 李海; 卞方寅
Original assignee: Suzhou Rail Transit City Area Line 1 Co ltd; China Railway Construction Heavy Industry Group Co Ltd; Zhongyifeng Construction Group Co Ltd
Current assignee: Suzhou Rail Transit City Area Line 1 Co ltd; China Railway Construction Heavy Industry Group Co Ltd; Zhongyifeng Construction Group Co Ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-02-12

Abstract

The invention discloses tunneling equipment for a tunnel communication channel, which is characterized by comprising a steel casing with a cutting knife for carrying out rotary cutting on a tunneling surface soil body, a driving device for providing rotary torque during equipment tunneling, an equipment fixing frame for fixing the tunneling equipment, a central pressure-bearing wall assembly for keeping the tunneling surface stable during tunneling, an outer side horizontal moving oil cylinder and an inner side horizontal moving oil cylinder which are arranged on an outer side sealing support shell and the central pressure-bearing wall assembly, a reaction frame for providing equipment propelling reaction force, a receiving steel casing and a receiving device arranged in a target tunnel, wherein the central pressure-bearing wall assembly is used for providing axial thrust during equipment tunneling; the rear end of the steel casing is connected with a steel pipe joint to form a cylindrical shell, and the excavated soil body is divided into an inner part and an outer part. The method for excavating the connecting channel between the tunnels has the advantages of small disturbance to the soil body, high construction efficiency, low construction cost, safety and reliability.

Description

Tunneling equipment for tunnel communication channel

Technical Field

The invention relates to the field of tunnel construction equipment, in particular to tunneling equipment for a tunnel connection channel.

Background

The tunnel connection channel is, as the name implies, a channel designed to connect two tunnels. If one tunnel has sudden problems, such as drainage and the condition that operation equipment stops operating due to faults, pedestrians can be transferred to the other tunnel through the connecting channel, so that rapid escape and rescue can be realized. The current connection channel construction method mainly comprises a shield method/pipe-jacking method, a pipe shed method, a mine method and the like. The shield method/pipe jacking method is adopted for construction, the ground sinks to a certain extent after construction, and the construction cost is high; the construction by adopting a pipe shed method is suitable for soft soil strata, and the construction needs to be supported in time, so that accidents are easy to happen and the safety is poor; the mining method is adopted for construction, including freezing method and the like, and is mainly used for hard bottom layers, water-rich strata are not suitable, ground settlement is large, safety is poor, and construction period is long. In conclusion, there is a great need in the art for an excavation apparatus with low cost, high safety and short construction period.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the tunneling equipment for the tunnel connection channel is capable of achieving safe excavation of the connection channel, short in construction period and relatively low in cost.

In order to achieve the technical effects, the invention adopts the technical scheme that:

a tunneling device for a tunnel communication channel is characterized by comprising a steel casing with a cutting knife for carrying out rotary cutting on a excavated surface soil body, a driving device for providing a rotating torque during tunneling of the device, a device fixing frame for fixing the tunneling device, a central pressure-bearing wall assembly for keeping the excavated surface stable during tunneling, a reaction frame for providing a propelling reaction of the device, a receiving device for receiving the steel casing, a receiving device arranged in a target tunnel and used for providing an axial propelling force during tunneling of the device, and an outer side horizontal moving oil cylinder and an inner side horizontal moving oil cylinder which are arranged on an outer side sealing support shell and the central pressure-bearing wall assembly; wherein, the number of the oil cylinders is adjusted according to the diameter of the equipment, and is generally not less than 4. The rear end of the steel casing is connected with a steel pipe joint, and the steel casing and the steel pipe joint are connected to form a cylindrical shell to divide the excavated soil body into an inner part and an outer part. And the rear end of the steel pipe joint is provided with a connecting structure connected with the front end of another steel pipe joint.

Further, the inner surface of the steel pipe joint is a smooth cylindrical surface, and the steel pipe joint is in contact with an inner rotating sealing system arranged on an inner sealing inner shell; the outer surface of the steel pipe joint is divided into two areas, the front end of the steel pipe joint is a smooth surface area with a cylindrical shape and is in contact with an outer rotary sealing system arranged on an outer sealing shell, and the rear end of the steel pipe joint is a rough surface area with a conical shape and is in close contact with a wedge-type pipe holding device arranged on a rotary gear ring.

Furthermore, the wedge-type pipe holding devices are arranged on the rotary gear ring, and the number of the wedge-type pipe holding devices is adjusted according to the diameter of the steel pipe joints and is generally not less than 4; a pressing oil cylinder on the wedge type pipe holding device extends out, a pipe holding wedge block is tightly pressed on a rough conical surface at the rear end of the outer surface of a steel pipe joint, torque is transmitted by friction force, and axial thrust is transmitted by a wedge surface.

Furthermore, the rotary gear ring is meshed with a driving pinion on the driving device, and the rotary gear ring is driven to rotate by the rotation of the driving pinion on the driving device and transmits torque. The rotary gear ring is connected with the outer sealing shell through a rotary support, and axial thrust is transmitted through the rotary support.

Furthermore, the reaction frame is fixed on the inner wall of the tunnel segment and provided with a central supporting oil cylinder fixing seat and a central supporting oil cylinder for transmitting propulsion reaction force, the central supporting oil cylinder is installed on the central pressure-bearing wall assembly, the central supporting oil cylinder is connected with the reaction frame through the central supporting oil cylinder fixing seat, and the central supporting oil cylinders are fixed on a central supporting oil cylinder fixing frame to form a stepping oil cylinder tensioning system so as to install a new steel pipe section.

Further, the outer rotary sealing system on the outer sealing outer shell and the inner rotary sealing system mounted on the inner sealing inner shell are lip-shaped sealing systems, and are provided with corresponding number of injection ports, lubricating grease or hydraulic oil can be injected for lubrication or cooling, and the injection port at the foremost end can be injected with sealing grease so as to prevent invasion of front muck or confined water to the sealing systems.

Furthermore, the outer sealing outer shell is connected with the outer sealing supporting shell through an outer side horizontal moving oil cylinder, and the inner sealing inner shell is connected with the central pressure-bearing wall assembly through an inner side horizontal moving oil cylinder. The horizontal moving oil cylinders on the inner side and the outer side run synchronously, so that the rotary sealing system is ensured not to move in the axial direction relative to the steel pipe joint, and the normal work of the rotary sealing system is ensured.

Furthermore, the outer side sealing support shell is provided with an outer side axial sealing system and an outer side wear-resistant guide ring, and the central pressure-bearing wall assembly is provided with an inner side wear-resistant guide plate and an inner side axial sealing system. The axial sealing system ensures the sealing performance of the axial movement of the equipment in the tunneling process, and the wear-resistant guide ring can ensure the stable axial sliding of the outer sealing outer shell and the inner sealing inner shell.

Furthermore, the outer sealing shell is provided with an outer sealing anti-rolling clamping support, the outer sealing anti-rolling guide arm is arranged on the outer sealing support shell, and the outer sealing anti-rolling guide arm form an outer side anti-rolling device, so that the outer side sealing support shell is prevented from rotating when equipment is driven, and the normal work of an outer side axial sealing system is guaranteed.

Furthermore, an inner sealing anti-rolling clamping support is arranged on the inner sealing inner shell, an inner sealing anti-rolling guide arm is arranged on the central pressure-bearing wall assembly, and the inner sealing anti-rolling guide arm form an inner side anti-rolling device, so that the inner sealing inner shell is prevented from rotating when equipment is driven, and the normal work of an inner side axial sealing system is guaranteed.

Furthermore, a portal static seal is arranged on the equipment fixing frame, so that the sealing performance between the tunnel and the equipment is ensured.

Furthermore, the fixed frame of equipment is provided with outside gasbag seal, be provided with inside gasbag seal on the pressure-bearing wall subassembly of center, when taking place emergency or having the needs, open outside gasbag seal, play emergency seal effect.

Furthermore, all the parts on the tunneling equipment can be disassembled in the tunnel, and the steel pipe sections can be withdrawn.

Compared with the prior art, the invention has the beneficial effects that: the driving device drives the rotary gear ring to rotate and the horizontal moving oil cylinder to stretch, the rotary gear ring transmits torque and horizontal driving force to the steel pipe joint through the wedge type pipe holding device, and the steel pipe joint is connected with the steel casing with the cutting knife to drive the steel pipe sleeve to tunnel forwards. The special design of the axial sealing system and the rotary sealing system can prevent the invasion of muck and confined water in the excavated soil body, and a step-changing type oil cylinder tightening system is also configured to facilitate the installation of new steel pipe joints. The whole set of equipment has the advantages of high tunneling speed, simple and reliable structure and relatively low cost.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments, and it is apparent that the described embodiments are some, but not all embodiments of the present invention.

Drawings

FIG. 1 is a front view of the apparatus;

FIG. 2 is a schematic axial view of the apparatus;

FIG. 3 is a schematic view of the transport of the apparatus in a tunnel;

FIG. 4 is a schematic view of the deployment of the apparatus within a tunnel;

FIG. 5 is a schematic view of the installation of a new steel pipe section;

FIG. 6 is a schematic diagram of the operation of the step-changing cylinder tightening system when a new steel pipe joint is installed;

FIG. 7 is a schematic view of the assembled new steel pipe joint after installation;

FIG. 8 is a schematic diagram of the equipment tunneling;

FIG. 9 is a schematic through-communication channel;

FIG. 10 is a schematic view of the communication channel after cleaning of the soil is completed;

FIG. 11 is a schematic view of the disassembly of the equipment parts in the tunnel;

FIG. 12 is a schematic diagram of a simulation of the pull back of a steel pipe section encountering a boulder.

Wherein, each reference number and its corresponding part in fig. 1-12 is:

1. a steel casing, 2 a steel pipe joint, 3 a rotary gear ring,

3-1, a wedge type pipe holding device, 4, a slewing bearing, 5, a driving device,

6. an outer sealed housing, 6-1. an outer rotary seal system,

6-2, external sealing anti-rolling clamping support, 7, external sealing support shell,

7-1. outer horizontal moving oil cylinder, 7-2. outer axial sealing system,

7-3, an outer wear-resistant guide ring, 7-4, an outer sealing anti-rolling guide arm,

8. the equipment is fixed on the frame, 8-1, the portal is statically sealed,

8-2, sealing the outer air bag,

9. a central pressure-bearing wall component, 9-1. an inner side wear-resistant guide plate,

9-2. inner side air bag sealing, 9-3. inner side horizontal moving oil cylinder,

9-4. inner side axial sealing system, 9-5. central supporting oil cylinder,

9 to 6 parts of central bearing wall, 9 to 7 parts of inner sealing anti-rolling guide arm,

9 to 8, a central supporting oil cylinder fixing frame, 10, an inner sealing inner shell,

10-1. internal rotation sealing system, 10-2. internal sealing anti-rolling clamping support,

11. reaction frame, 11-1, oil cylinder fixing seat.

Detailed Description

A tunnelling apparatus for a tunnel communication channel, as shown in figures 1 to 12, the apparatus comprising: the device comprises a steel casing 1 with cutting blades for performing rotary cutting on an excavated surface soil body, a driving device 5 for providing rotating torque during equipment excavation, an equipment fixing frame 8 for fixing excavation equipment, a central pressure-bearing wall assembly 9 for keeping an excavated surface stable during excavation, a reaction frame 11 for providing propulsion reaction force of the equipment, a receiving device for receiving the steel casing 1 and arranged in a target tunnel, and an outer side horizontal moving oil cylinder 7-1 and an inner side horizontal moving oil cylinder 9-3 which are used for providing axial thrust during equipment excavation and are arranged on an outer side sealing supporting shell 7 and the central pressure-bearing wall assembly 9, wherein the number of the oil cylinders is adjusted according to the diameter of a steel pipe joint 2 and is generally not less than 4. The rear end of a steel casing 1 with a cutting knife is connected with a steel pipe section 2, the steel casing 1 and the steel pipe section 2 are connected to form a cylindrical shell, and an excavated soil body is divided into an inner part and an outer part. The rear end of the steel pipe joint 2 is provided with a structure connected with another steel pipe joint 2.

Further, the inner surface of the steel pipe joint 2 is a smooth cylindrical surface, and is in contact with an inner rotary sealing system 10-1 mounted on an inner sealed inner shell 10. The outer surface of the steel pipe joint 2 is divided into two areas, the front end of the steel pipe joint is a smooth surface area with a cylindrical shape and is in contact with an outer rotary sealing system 6-1 arranged on an outer sealing shell 6, and the rear end of the steel pipe joint is a rough surface area with a conical shape and is in close contact with a wedge type pipe holding device 3-1 arranged on a rotary gear ring 3.

Further, the wedge-type pipe holding devices 3-1 are mounted on the rotary gear ring 3, and the number of the wedge-type pipe holding devices is adjusted according to the diameter of the steel pipe joint 2 and is generally not less than 4. The pipe holding wedge block is tightly pressed on the rough conical surface at the rear end of the outer surface of the steel pipe joint 2 by extending out of a pressing oil cylinder on the wedge type pipe holding device 3-1, torque is transmitted by friction force, and axial thrust is transmitted by a wedge surface.

Further, the swing ring gear 3 is engaged with a drive pinion on the drive device 5, and the rotation of the swing ring gear 3 is carried out by the rotation of the drive pinion on the drive device 5, and the torque is transmitted. The slewing ring gear 3 is connected with the outer sealing shell 6 through the slewing bearing 4, and axial thrust is transmitted through the slewing bearing 4.

Further, a reaction frame 11 is fixed on the inner wall of the tunnel segment, a cylinder fixing seat 11-1 connected with a central supporting cylinder 9-5 and the central supporting cylinder 9-5 which transmits the pushing reaction force and is installed on a central pressure bearing wall assembly 9 are arranged on the reaction frame 11, the central supporting cylinder 9-5 can be connected with the reaction frame 11 through the cylinder fixing seat 11-1, and a plurality of central supporting cylinders 9-5 are fixed on a central supporting cylinder fixing frame 9-8 on a central pressure bearing wall 9-6 to form a step-changing cylinder tensioning system so as to install a new steel pipe joint 2.

Further, the outer rotary sealing system 6-1 on the outer sealing outer shell 6 and the inner rotary sealing system 10-1 mounted on the inner sealing inner shell 10 are lip-shaped sealing systems and are provided with corresponding injection ports, lubricating grease or hydraulic oil can be injected for lubrication or cooling, and the injection port at the foremost end can be injected with sealing grease so as to prevent invasion of front slag or confined water to the sealing systems.

Further, the outer sealed outer shell 6 is connected with the outer sealed supporting shell 7 through an outer side horizontal moving oil cylinder 7-1, and the inner sealed inner shell 10 is connected with the central pressure-bearing wall assembly 9 through an inner side horizontal moving oil cylinder 9-3. The horizontal moving oil cylinders on the inner side and the outer side run synchronously, and the rotary sealing system is guaranteed not to move axially relative to the steel pipe joint 2, so that the normal work of the rotary sealing system is guaranteed.

Further, the outer sealing support shell 7 is provided with an outer axial sealing system 7-2 and an outer wear-resistant guide ring 7-3, and the central pressure-bearing wall assembly 9 is provided with an inner wear-resistant guide plate 9-1 and an inner axial sealing system 9-4. The axial sealing system ensures the sealing performance of the axial movement of the equipment in the tunneling process, and the wear-resistant guide ring can ensure the stable axial sliding of the outer sealing outer shell 6 and the inner sealing inner shell 10.

Furthermore, an outer sealing anti-rolling clamping support 6-2 is arranged on the outer sealing shell 6, an outer sealing anti-rolling guide arm 7-4 is arranged on the outer sealing support shell 7, and the outer sealing anti-rolling guide arm form an outer anti-rolling device, so that the outer sealing support shell 7 cannot rotate when equipment is tunneled, and the normal work of an outer axial sealing system 7-2 is guaranteed.

Furthermore, an inner sealing anti-rolling clamping support 10-2 is arranged on the inner sealing inner shell 10, an inner sealing anti-rolling guide arm 9-7 is arranged on the central pressure-bearing wall assembly 9, and the inner sealing anti-rolling guide arm form an inner side anti-rolling device, so that the inner sealing inner shell 10 cannot rotate when equipment is driven, and the normal work of an inner side axial sealing system 9-4 is ensured.

Further, a portal static seal 8-1 is arranged on the equipment fixing frame 8, and the sealing performance between the tunnel and the equipment is guaranteed. The equipment fixing frame 8 is further provided with an outer side air bag seal 8-2, the central pressure-bearing wall assembly 9 is provided with an inner side air bag seal 9-2, and when an emergency situation occurs or needs are needed, the outer side air bag seal 8-2 is opened to achieve an emergency sealing effect.

Further, all the parts on the tunneling equipment can be disassembled in the tunnel, and the steel pipe joint 2 can be withdrawn.

Compared with the prior art, the invention has the beneficial effects that: the driving device drives the rotary gear ring to rotate and the horizontal moving oil cylinder to stretch, the rotary gear ring transmits torque and horizontal driving force to the steel pipe joint through the wedge type pipe holding device, and the steel pipe joint is connected with the steel casing with the cutting knife to drive the steel pipe sleeve to tunnel forwards. The invasion of muck and confined water in the excavated soil body can be prevented through the special design of the axial sealing system and the rotary sealing system; the inner side of the steel pipe sleeve is a central pressure-bearing wall assembly, provides support for an excavation face soil body, and is provided with a step-changing type oil cylinder tightening system so as to facilitate installation of a new steel pipe joint. The whole set of equipment has the advantages of high tunneling speed, simple and reliable structure and relatively low cost.

The present invention is not limited to the above-described embodiments, and various modifications made without inventive step from the above-described concept will fall within the scope of the present invention for those skilled in the art.

Claims

1. A tunneling device for a tunnel communication channel is characterized by comprising a steel casing with a cutting knife for carrying out rotary cutting on a excavated surface soil body, a driving device for providing rotary torque during tunneling of the device, a device fixing frame for fixing the tunneling device, a central pressure-bearing wall assembly for keeping the excavated surface stable during tunneling, an axial thrust during tunneling of the device, an outer side horizontal moving oil cylinder and an inner side horizontal moving oil cylinder which are arranged on an outer side sealing support shell and the central pressure-bearing wall assembly, a reaction frame for providing a pushing reaction force of the device, a receiving device for receiving the steel casing and a receiving device arranged in a target tunnel; the rear end of the steel casing is connected with a steel pipe joint, the steel casing and the steel pipe joint are connected to form a cylindrical shell, and an excavated soil body is divided into an inner part and an outer part; and the rear end of the steel pipe joint is provided with a connecting structure connected with the front end of another steel pipe joint.

2. A tunnelling apparatus for a tunnel communication channel as claimed in claim 1, wherein the inner surface of the steel pipe section is a smooth cylindrical surface, the steel pipe section being in contact with an internal rotary seal system mounted on an internal sealed casing; the outer surface of the steel pipe joint is divided into two areas, the front end of the steel pipe joint is a smooth surface area with a cylindrical shape and is in contact with an outer rotary sealing system arranged on an outer sealing shell, and the rear end of the steel pipe joint is a rough surface area with a conical shape and is in close contact with a wedge-type pipe holding device arranged on a rotary gear ring.

3. A tunnelling apparatus for a tunnel communication channel as claimed in claim 2, wherein the wedge type pipe embracing means is mounted on the rotary ring gear and extends through a hold-down cylinder on the wedge type pipe embracing means to press the pipe embracing wedge tightly against the rough conical surface at the rear end of the outer surface of the steel pipe section, transmitting torque by friction and axial thrust by the wedge surface.

4. A tunnelling apparatus for a tunnel communication tunnel according to claim 2, wherein the slewing ring gear meshes with a drive pinion on the drive means, the slewing ring gear being connected to the outer sealed casing by a slewing bearing and transmitting axial thrust through the slewing bearing.

5. A tunneling apparatus for tunnel communication tunnel according to claim 1, wherein said reaction frame is fixed on the inner wall of the tunnel segment, and the reaction frame is provided with a center support cylinder fixing seat and a center support cylinder for transmitting the propelling reaction force, and is mounted on the center pressure wall assembly, said center support cylinder is connected with the reaction frame through the center support cylinder fixing seat, and a plurality of center support cylinders are fixed on the center support cylinder fixing frame to form a step-changing cylinder bracing system.

6. A tunnelling device for a tunnel communication channel as claimed in claim 2, wherein the outer rotary sealing system on the outer casing and the inner rotary sealing system on the inner casing are lip type sealing systems and are provided with a corresponding number of injection ports into which grease or hydraulic oil can be injected for lubrication or cooling purposes, and the forward most injection port is injected with sealing grease to prevent ingress of debris or pressurized water ahead into the sealing systems.

7. A tunnelling apparatus for a tunnel communication channel as claimed in claim 2, wherein the outer seal housing is connected to the outer seal support housing by an outer lateral displacement ram and the inner seal housing is connected to the centre bulkhead assembly by an inner lateral displacement ram.

8. A tunnelling apparatus for a tunnel communication channel as claimed in claim 2, wherein the outboard seal support casing is provided with an outboard axial seal system and an outboard wear guide ring, and the pressure centre wall assembly is provided with an inboard wear guide plate and an inboard axial seal system.

9. A tunnelling apparatus for a tunnel communication channel as claimed in claim 2, wherein an outer seal anti-roll clamp bracket is provided on the outer seal casing and an outer seal anti-roll guide arm is provided on the outer seal support casing.

10. A tunnelling apparatus for a tunnel communication channel as claimed in any one of claims 1 to 2, wherein an inner seal anti-roll clamp bracket is provided on the inner seal inner casing and an inner seal anti-roll guide arm is provided on the confined centre wall assembly.

11. A tunnelling apparatus for a tunnel communication channel as claimed in claim 1, wherein a portal seal and an outboard bladder seal are provided to the apparatus mounting frame and an inboard bladder seal is provided to the pressure centre wall assembly.