CN112746852A - Tunneling equipment and method for tunnel communication channel by means of flexible sleeve initial receiving - Google Patents
Tunneling equipment and method for tunnel communication channel by means of flexible sleeve initial receiving Download PDFInfo
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- CN112746852A CN112746852A CN202110078986.4A CN202110078986A CN112746852A CN 112746852 A CN112746852 A CN 112746852A CN 202110078986 A CN202110078986 A CN 202110078986A CN 112746852 A CN112746852 A CN 112746852A
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- 230000005641 tunneling Effects 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004891 communication Methods 0.000 title claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 33
- 238000005520 cutting process Methods 0.000 claims description 48
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 230000003014 reinforcing effect Effects 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 239000002689 soil Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
- E21D11/403—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries combined with the head machine
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
- E21D9/0873—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines the shield being provided with devices for lining the tunnel, e.g. shuttering
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses tunneling equipment and a tunneling method for a tunnel communication channel by means of flexible sleeve initial receiving, wherein the tunneling equipment comprises a tunneling device, a supporting trolley, a flexible initial sleeve system, a flexible receiving sleeve system and a moving device; the moving device is arranged on the supporting trolley, supports the flexible starting sleeve system and the tunneling device and is used for enabling the flexible starting sleeve system and the tunneling device to move back and forth along the starting axis direction of the communication channel; the flexible starting sleeve system and the flexible receiving sleeve system are correspondingly connected with the main tunnel segments on the starting side and the receiving side; the method of the invention mainly can adjust the posture according to the initial receiving of the development machine through the adaptability of the flexible sleeve system, and is convenient for opening and connecting with the main tunnel segment and taking out the cut tunnel portal segment. Compared with the existing similar equipment and method, the method has the advantages of strong adaptability, high construction efficiency, completely controllable construction risk and the like.
Description
Technical Field
The invention relates to the field of tunnel construction equipment, in particular to tunnel connection channel tunneling equipment and a tunnel connection channel tunneling method which are initiated and received by means of a flexible sleeve.
Background
The tunnel connection channel is 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. Taking the situation of urban rail transit tunnel connection channels as an example, the specification of subway design (GB50157-2013) states that "two single-line interval tunnels should be provided with connection channels, and the distance between two adjacent connection channels should not be more than 600 m". At present, the total mileage of planning and constructing subways in a plurality of cities in China is nearly 8000km, and the number of contact channels to be constructed is large according to the design specification of the subways.
The traditional contact channel construction method mainly comprises a freezing method, a mining method and the like, more safety accidents occur in the construction process, and the industry begins to explore the purely mechanical shield method/pipe-jacking method construction contact channel.
At present, a contact channel constructed by a pure mechanical shield method or a pipe jacking method is still in a starting stage, related technologies are not complete, and the following defects exist: (1) the traditional rigid sleeve has the problems of butt joint mismatching caused by the influence of the construction process, the machining precision, various deformations and measurement errors, is difficult to install and connect and influences the working efficiency; (2) when the main tunnel segment at the tunnel portal is cut by the cutter head, the cutter head directly cuts the main tunnel segment and is easy to deviate from a tunneling axis, the cutting efficiency is low, the time consumption is long, and the ground settlement amount in a receiving stage is large; (3) in the construction process, if accidents occur at the portal, the working face is urgently required to be exposed for treatment, and the sleeve is difficult to disassemble after the sealed rigid sleeve is installed.
In conclusion, a tunneling device and a related construction technology which are stronger in adaptability, easier to implement, better in safety and higher in tunneling efficiency are urgently needed in the field.
Disclosure of Invention
The invention aims to provide tunneling equipment and a tunneling method for tunneling communication channels by means of initial receiving of flexible sleeves, so as to overcome the technical defects.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a tunnel contact passageway tunnelling is equipped with the help of flexible sleeve is originated and is received, includes tunnelling device and support platform truck, tunnelling device is equipped with blade disc, cutting beaded finish, propulsion connecting rod, the cutting beaded finish thrust cylinder of taking telescopic spoke, its characterized in that: also included are a flexible originating sleeve system, a flexible receiving sleeve system, and a movement device; the moving device is arranged on the supporting trolley, a flexible starting sleeve system and a tunneling device wrapped in the flexible starting sleeve are supported on the moving device, and the moving device is used for enabling the flexible starting sleeve system and the tunneling device wrapped in the flexible starting sleeve to move back and forth along the starting axis direction of the communication channel; the flexible originating sleeve system is connected to the primary tunnel segment by a first flexible annular sleeve at its forward end and the flexible receiving sleeve system is connected to the primary tunnel segment by a second flexible annular sleeve at its forward end.
Further, the flexible starting sleeve system also comprises a starting steel sleeve, the rear end of the first flexible annular sleeve is connected with the starting steel sleeve through bolts, and the front end of the first flexible annular sleeve is connected with the main tunnel segment through bolts and a first annular flange plate.
Further, the flexible receiving sleeve system further comprises a receiving steel sleeve and an end seal plate; the end sealing plate is arranged at the rear part of the receiving steel sleeve, and the second flexible annular sleeve is arranged at the front end of the receiving steel sleeve; the rear end of the second flexible annular sleeve is connected with the receiving steel sleeve through bolts, and the front end of the second flexible annular sleeve is connected with the main tunnel segment through bolts and a second annular flange plate.
Further, the first flexible annular sleeve and the second flexible annular sleeve are made of rubber or other flexible materials.
Further, the tunneling device is a shield tunneling machine or a pipe jacking machine.
Furthermore, first flexible annular sleeve and the flexible annular sleeve of second form by one section or the concatenation of a plurality of sections annular sleeve subsection, annular sleeve subsection both sides respectively are provided with an annular installation wing, be equipped with a plurality of bolt holes on the annular installation wing, adjacent connect fixedly through connecting the external member between the annular sleeve subsection.
Furthermore, the connection kit includes two ring-shaped pressing plates, a steel ring connecting plate, and runs through the bolt that sets up in ring-shaped pressing plate, annular installation wing and steel ring connecting plate, all correspond on ring-shaped pressing plate and the steel ring connecting plate and be equipped with bolt assorted bolt hole.
The invention discloses a construction method of tunnel connection channel tunneling equipment initiated and received by means of a flexible sleeve, which is characterized by comprising the following construction steps of:
s1, construction preparation: reinforcing the outside of a starting tunnel door before construction, detecting a reinforcing body, installing a horizontal transportation rail, installing water and electricity, welding a steel-concrete pipe piece joint at the tunnel door, installing a tunnel door ring and the like;
s2, equipment installation and debugging: hoisting, transporting tunneling equipment and related matched equipment and materials, and positioning, assembling and debugging;
s3, cutting a main tunnel segment at the starting tunnel portal: after the equipment is installed and debugged, the tunneling device starts to generate a hole, and cuts a main tunnel segment at the starting hole gate to work by utilizing a cutter head, the tunneling device stretches out a cutting reinforcing ring, the cutter head rotates to drive the cutting reinforcing ring to rotate, and the main tunnel segment at the starting hole gate is cut;
s4, returning and taking out the main tunnel segment at the starting tunnel portal: the cutting reinforcing ring carries the cut main tunnel segment at the starting tunnel portal and returns to the main tunnel;
after the soil body at the confirmed hole door to be detected is stable and does not seep water, the connecting bolt of the first flexible annular sleeve and the first annular flange plate is loosened, so that the front end of the first flexible annular sleeve is separated from the first annular flange plate. The moving device is adjusted to move the tunneling device and the flexible starting sleeve system wrapping the tunneling device backwards by 0.5-1.0 m, and the cut tunnel portal duct piece is taken out;
after retracting the cutting reinforcing ring to the original position, moving the moving device and the flexible starting sleeve system wrapping the tunneling equipment back to the original position; aligning a heading device cutter head to a communication channel starting tunnel door, and connecting a first flexible annular sleeve of the flexible starting sleeve system with the first annular flange plate again;
s5, starting tunneling: injecting a soil pressure balance medium into a soil bin behind a cutter head of the tunneling device, and starting normal tunneling and segment assembly of the tunneling device;
s6, cutting a main tunnel segment at the receiving portal: after the tunneling device tunnels to a receiving portal, the cutting reinforcing ring is stretched out, and the cutter head rotates to drive the cutting reinforcing ring to rotate so as to cut a main tunnel segment at the receiving portal;
s7, receiving tunneling: the tunneling equipment carries the main tunnel segment at the cut and penetrated receiving portal into a flexible receiving sleeve system;
s8, receiving and blocking a tunnel portal: and after the receiving tunneling is finished, plugging the receiving tunnel portal, grouting and filling behind the wall, welding tunnel portal steel plates, dismantling equipment and finishing construction.
Further, the step S2 includes installing the flexible starting sleeve system, assembling the flexible receiving sleeve system, and detecting the sealing effect of the flexible receiving sleeve system.
Further, the step S2 includes performing attitude adjustment on the heading device; adjusting the attitude of the tunneling device comprises adjusting the moving device to enable the tunneling device to be close to a starting position of the tunnel portal; and simultaneously, checking that all systems of the tunneling device and the matched equipment are in a complete normal working state.
Further, in the step S4, the segment taking-out process method includes: and opening the connection between the first flexible annular sleeve and the first annular flange plate, and moving out the cut primary tunnel segment at the initial tunnel portal through a hoisting device which is pre-installed inside the primary tunnel at the initial tunnel portal.
Further, the step S4 includes checking the stabilization and water stopping effect of the reinforcement body outside the tunnel portal after the main tunnel segment at the initial tunnel portal is cut through.
Compared with the prior art, the invention has the following technical effects:
(1) compared with the traditional rigid sleeve, the flexible sleeve system has better adaptability to the field installation environment condition and is easier to install and connect; the flexible sleeve system can be properly adjusted according to the angle of the heading machine during initial receiving, the adaptability of the entrance and exit portal is improved, the problem of butt joint mismatching caused by the influence of the construction process, the processing precision, various deformations and measurement errors during the initial receiving and the receiving of the actual construction sleeve is avoided, and the damage of the main tunnel segment of the portal is avoided.
(2) The invention adopts the cutting reinforcing ring to cut the tunnel portal segment in the starting and receiving stages, is easier to cut into the main tunnel segment, does not deviate from the tunneling axis, has better cutting efficiency and more economical and controllable construction period, reduces the disturbance to the soil layer at the receiving end and reduces the surface subsidence of the receiving end.
(3) The flexible annular sleeve in the flexible sleeve system of the present invention facilitates opening and reinstallation; this configuration enables removal of the primary tunnel segment cut at the time of origination, as compared to a rigid origination sleeve.
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 schematic diagram of the overall structure of the equipment of the present invention.
FIG. 2 is a schematic view of a starting cutting segment according to the present invention.
Figure 3 is a schematic view of the excavation equipment of the present invention with the segment removed.
Figure 4 is a schematic view of the ripping equipment of the present invention.
FIG. 5 is a schematic view of a flexible originating sleeve system of the present invention.
Fig. 6 is a schematic view of the construction of the flexible receiving sleeve system of the present invention.
Figure 7 is a schematic diagram of the cutterhead configuration of the ripping apparatus of the present invention.
Figure 8 is a schematic view of the construction of the first and second flexible annular sleeves of the present invention.
FIG. 9 is a schematic structural view of the steel ring connecting plate of the present invention.
Reference numerals:
1-a cutter head; 2-telescopic spokes; 3-cutting a reinforcing ring;
4-pushing the connecting rod; 5-cutting the reinforcing ring propulsion oil cylinder; 6-supporting the trolley;
7-reinforcing body; 8-a flexible originating sleeve system; 9-a first annular flange plate;
10-a first flexible annular sleeve; 11-originating the steel casing; 12-a wire brush;
13-a primary tunnel segment; 14-a primary tunnel segment; 15-a flexible receiving sleeve system;
16-a second annular flange plate; 17-a second flexible annular sleeve; 18-receiving a steel sleeve;
19-end sealing plate; 20-a mobile device; 21-main tunnel segment
22-an annular sleeve segment; 23-annular mounting wings; 24-a connection kit;
25-an annular platen; 26-steel ring connection plate.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1-7, the embodiment of the invention discloses a tunneling device for tunneling communication tunnel with flexible sleeve originating reception, which comprises a tunneling device, a supporting trolley 6, a flexible originating sleeve system 8, a flexible receiving sleeve system 15 and a moving device 20.
The tunneling device is provided with a cutter head 1 with telescopic spokes 2, a cutting reinforcing ring 3, a propelling connecting rod 4 and a cutting reinforcing ring propelling oil cylinder 5. The flexible starting sleeve system 8 comprises a starting steel sleeve 11 and a first flexible annular sleeve 10 arranged at the front end of the starting steel sleeve 11. The rear end of the first flexible annular sleeve 10 is connected with a starting steel sleeve 11 through a bolt, the front end of the first flexible annular sleeve is connected with a first annular flange plate 9 through a bolt, and the front end of the first annular flange plate 9 is connected with a main tunnel segment 21 through an annular steel plate. The flexible receiving sleeve system 15 comprises a receiving steel sleeve 18, an end closure plate 19 arranged at the rear of the receiving steel sleeve 18, and a second flexible annular sleeve 17 arranged at the front end of the receiving steel sleeve 18. The rear end of the second flexible annular sleeve 17 is connected with the receiving steel sleeve 18 through bolts, the front end of the second flexible annular sleeve is connected with the second annular flange plate 16 through bolts, and the front end of the second annular flange plate 16 is connected with the main tunnel segment 21 through an annular steel plate.
The first flexible annular sleeve 10 and the second flexible annular sleeve 17 are made of rubber or other flexible materials. As shown in fig. 8 and 9, each of the first flexible annular sleeve 10 and the second flexible annular sleeve 17 is formed by splicing one or more annular sleeve segments 22, two annular mounting wings 23 are respectively disposed on two sides of each of the annular sleeve segments 22, a plurality of bolt holes are disposed on each of the annular mounting wings 23, and adjacent annular sleeve segments 22 are connected and fixed through a connecting sleeve 24. The connecting kit 24 comprises two annular pressing plates 25, a steel ring connecting plate 26 and bolts penetrating through the annular pressing plates 25, the annular mounting wings 23 and the steel ring connecting plate 26, and bolt holes matched with the bolts are correspondingly arranged on the annular pressing plates 25 and the steel ring connecting plate 26.
The moving means 20 is mounted on the support trolley 6 on which the flexible starting sleeve system 8 and the ripping apparatus encased in the flexible starting sleeve system 8 are supported, the moving means 20 being capable of moving the flexible starting sleeve system 8 and the ripping apparatus encased in the flexible starting sleeve system 8 back and forth in the direction of the starting axis of the communication passage.
Wherein the tunneling device is a shield machine or a pipe jacking machine with a cutting reinforcing ring 3. The cutter head 1 comprises a cutter head capable of cutting soil and telescopic spokes 2, when the telescopic spokes 2 extend out, the cutter head 1 is in a normal cutting state, and the excavation diameter is slightly larger than the diameter of the shield body; when the telescopic spokes 2 are retracted, the diameter of the cutter head 1 is smaller than the inner diameter of the cutting reinforcing ring 3. The cutting reinforcing ring 3 comprises a circular cylinder body and a stretching and recovering system of the cylinder body, and a cutter is arranged at the front end of the cutting reinforcing ring 3. When the telescopic spokes 2 of the cutter head 1 retract, the cutting reinforcing ring 3 can smoothly extend to the front end of the cutter head 1 for a certain length. When the cutter head 1 is in a normal cutting state, the telescopic spokes 2 are in an extending state; when the telescopic spokes 2 retract, the cutting reinforcing ring 3 extends out, and the main tunnel segment at the front end of the main tunnel segment is cut by utilizing the rotation of the cutter head 1 to drive the cutting reinforcing ring 3 to rotate. The main tunnel segment is a reinforced concrete segment or a glass fiber reinforced plastic segment or a reinforced concrete composite segment.
The embodiment of the invention also discloses a method for constructing by adopting the tunneling equipment, which comprises the following construction steps:
s1, construction preparation: and (3) reinforcing the starting tunnel portal outside the starting tunnel portal before construction, detecting a reinforcing body 7, installing a horizontal transportation rail, installing water and electricity, welding a steel-concrete pipe piece joint at the tunnel portal, installing a tunnel portal ring and the like.
S2, equipment installation and debugging: hoisting, transporting and tunneling equipment, matching equipment and materials, and positioning, assembling and debugging.
S3, cutting a main tunnel segment at the starting tunnel portal: after the equipment is installed and debugged, the tunneling device starts to generate a hole, the main tunnel segment 13 at the starting tunnel portal is cut by the cutter head 1 to work, the cutting reinforcing ring 3 is extended out by the tunneling device, the cutter head 1 rotates to drive the cutting reinforcing ring 3 to rotate, and the main tunnel segment 13 at the starting tunnel portal is cut.
S4, returning and taking out the main tunnel segment at the starting tunnel portal: after the main tunnel segment 13 at the starting portal is cut through, the stability and the water stopping effect of the reinforcing body outside the portal are checked, and the cutting reinforcing ring 3 together with the cut main tunnel segment 13 at the portal is retracted into the main tunnel (as shown in fig. 3).
After the soil body at the confirmed hole door is stable and impervious to be detected, the connecting bolt of the first flexible annular sleeve 10 and the first annular flange plate 9 is loosened, and the first flexible annular sleeve 10 is separated from the first annular flange plate 9. And the adjusting and moving device 20 moves the tunneling device and the flexible starting sleeve system 8 wrapping the tunneling device backwards by 0.5-1.0 m, and the cut tunnel portal segment is taken out. The method for taking out the tunnel portal duct piece comprises the following steps: the connection of the first flexible annular sleeve 10 to the first annular flange plate 9 is opened and the cut primary tunnel segment 13 of the starting tunnel portal is removed by means of a hoisting device pre-installed inside the primary tunnel.
After the cutting reinforcing ring 3 is retracted to the original position, the moving device 20 and the flexible starting sleeve system 8 wrapping the tunneling device are moved back to the original position; the cutterhead 1 is aligned with the initial opening of the communication channel and the first flexible annular sleeve 10 is reconnected to the first annular flange plate 9.
S5, starting tunneling: injecting soil pressure balance medium to the rear of a cutter head 1 of the tunneling device, and starting normal tunneling and segment assembly of the tunneling device; 2-3 steel wire brushes 12 are required to be installed inside the rear end of the initial steel sleeve 11, shield tail grease is smeared on the steel wire brushes 12 before tunneling, and shield tail grease is filled in cavities among the steel wire brushes 12 to prevent underground water from entering a main tunnel.
S6, cutting a main tunnel segment at the receiving portal: the tunneling device tunnels to the outer side of the receiving tunnel portal, stops, extends the cutting reinforcing ring 3 out, continues tunneling, and rotates the cutter head 1 to drive the cutting reinforcing ring 3 to rotate so as to cut and penetrate through the main tunnel segment 14 at the receiving tunnel portal (as shown in fig. 4).
S7, receiving tunneling: the tunnelling device carries the main tunnel segments 14 at the receiving portal which have been cut through into a flexible receiving sleeve system 15.
S8, sealing the tunnel portal: and after the receiving tunneling is finished, plugging the receiving tunnel portal, grouting and filling behind the wall, welding tunnel portal steel plates, dismantling equipment and finishing construction.
The step S2 includes installation of the flexible starting sleeve system 8, assembly of the flexible receiving sleeve system 15, detection of the sealing effect of the flexible receiving sleeve system 8, and attitude adjustment of the heading device. The attitude adjustment of the tunneling device comprises adjusting a moving device 20 to enable the tunneling device to be close to a starting position of a tunnel portal; and simultaneously, checking that all systems of the tunneling device and the matched equipment are in a complete normal working state.
Compared with the prior art, the invention has the following technical effects:
(1) the flexible sleeve system (comprising the flexible starting sleeve system and the flexible receiving sleeve system) has better adaptability to the field installation environment conditions, and is easier to install and connect; the flexible sleeve system can be properly adjusted according to the posture of the heading machine during initial receiving, the adaptability of the entrance and exit portal is improved, the problem of butt joint mismatching caused by the influence of the construction process, the processing precision, various deformations and measurement errors during the initial receiving and the receiving of the actual construction sleeve is avoided, and the damage of a main tunnel segment of the portal is avoided.
(2) The invention adopts the cutting reinforcing ring to cut the tunnel portal segment in the starting and receiving stages, is easier to cut into the main tunnel segment, does not deviate from the tunneling axis, has better cutting efficiency, saves and controls the construction period, has less disturbance to the soil layer near the outer side of the tunnel portal and has less ground surface settlement to the receiving end.
(3) The flexible annular sleeve in the flexible sleeve system of the present invention facilitates opening and reinstallation; this configuration enables removal of the primary tunnel segment cut at the time of origination, as compared to a rigid origination sleeve.
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 (10)
1. A tunneling device for tunnel communication channel receiving by means of flexible sleeve initiation comprises a tunneling device and a supporting trolley, wherein the tunneling device is provided with a cutter head with telescopic spokes, a cutting reinforcing ring, a propelling connecting rod and a cutting reinforcing ring propelling oil cylinder; the device is characterized by further comprising a flexible starting sleeve system, a flexible receiving sleeve system and a moving device; the moving device is arranged on the supporting trolley, a flexible starting sleeve system and a tunneling device wrapped in the flexible starting sleeve are supported on the moving device, and the moving device is used for enabling the flexible starting sleeve system and the tunneling device wrapped in the flexible starting sleeve to move back and forth along the starting axis direction of the communication channel; the flexible originating sleeve system is connected to the primary tunnel segment by a first flexible annular sleeve at its forward end and the flexible receiving sleeve system is connected to the primary tunnel segment by a second flexible annular sleeve at its forward end.
2. A tunneling assembly according to claim 1 and wherein said flexible initiation sleeve system further comprises a flexible annular sleeve, said first flexible annular sleeve being bolted at its rear end to said initiation steel sleeve and bolted at its front end to said primary tunnel segment with a first annular flange plate.
3. A tunneling rig for initial reception of a tunnel communication with a flexible sleeve system according to claim 1 wherein said flexible receiving sleeve system further includes a receiving steel sleeve and an end closure plate; the end sealing plate is arranged at the rear part of the receiving steel sleeve, and the second flexible annular sleeve is arranged at the front end of the receiving steel sleeve; the rear end of the second flexible annular sleeve is connected with the receiving steel sleeve through bolts, and the front end of the second flexible annular sleeve is connected with the main tunnel segment through bolts and a second annular flange plate.
4. A tunnelling machine which is initiated to receive by means of a flexible sleeve as claimed in claim 1, wherein said first and second flexible annular sleeves are of rubber.
5. A tunnelling machine which is initiated to receive by means of a flexible sleeve as claimed in claim 1, wherein the tunnelling device is a shield or pipe push.
6. The tunneling device for initial reception of a tunneling communication channel through a flexible sleeve according to claim 1, wherein the first flexible annular sleeve and the second flexible annular sleeve are formed by splicing one or more annular sleeve segments, an annular mounting wing is respectively arranged on each of two sides of each annular sleeve segment, a plurality of bolt holes are formed in each annular mounting wing, and adjacent annular sleeve segments are fixedly connected through a connecting sleeve.
7. The tunneling device for initial reception of tunneling communication according to claim 6, wherein the connection kit comprises two annular pressing plates, a steel annular connecting plate, and bolts penetrating the annular pressing plates, the annular mounting wings and the steel annular connecting plate, and the annular pressing plates and the steel annular connecting plate are respectively provided with bolt holes matched with the bolts.
8. A construction method of tunneling equipment of a tunnel communication channel initiated and received by a flexible sleeve is characterized by comprising the following construction steps:
s1, construction preparation: reinforcing the outside of a starting tunnel door before construction, detecting a reinforcing body, installing a horizontal transportation rail, installing water and electricity, welding a steel-concrete pipe piece joint at the tunnel door, and installing a tunnel door ring;
s2, equipment installation and debugging: hoisting, transporting tunneling equipment and related matched equipment and materials, and positioning, assembling and debugging;
s3, cutting a main tunnel segment at the starting tunnel portal: after the equipment is installed and debugged, the tunneling device starts to generate a hole, and cuts a main tunnel segment at the starting hole gate to work by utilizing a cutter head, the tunneling device stretches out a cutting reinforcing ring, the cutter head rotates to drive the cutting reinforcing ring to rotate, and the main tunnel segment at the starting hole gate is cut;
s4, returning and taking out the main tunnel segment at the starting tunnel portal: the cutting reinforcing ring carries the cut main tunnel segment at the starting tunnel portal and returns to the main tunnel;
after the soil body at the confirmed hole door to be detected is stable and does not seep water, loosening the connecting bolt of the first flexible annular sleeve and the first annular flange plate to separate the front end of the first flexible annular sleeve from the first annular flange plate; the moving device is adjusted to move the tunneling device and the flexible starting sleeve system wrapping the tunneling device backwards by 0.5-1.0 m, and the cut tunnel portal duct piece is taken out;
after retracting the cutting reinforcing ring to the original position, moving the moving device and the flexible starting sleeve system wrapping the tunneling equipment back to the original position; aligning a heading device cutter head to a communication channel starting tunnel door, and connecting a first flexible annular sleeve of the flexible starting sleeve system with the first annular flange plate again;
s5, starting tunneling: injecting a soil pressure balance medium into a soil bin behind a cutter head of the tunneling device, and starting normal tunneling and segment assembly of the tunneling device;
s6, cutting a main tunnel segment at the receiving portal: after the tunneling device tunnels to a receiving portal, the cutting reinforcing ring is stretched out, and the cutter head rotates to drive the cutting reinforcing ring to rotate so as to cut a main tunnel segment at the receiving portal;
s7, receiving tunneling: the tunneling equipment carries the main tunnel segment at the cut and penetrated receiving portal into a flexible receiving sleeve system;
s8, receiving and blocking a tunnel portal: and after the receiving tunneling is finished, plugging the receiving tunnel portal, grouting and filling behind the wall, welding tunnel portal steel plates, dismantling equipment and finishing construction.
9. The construction method of tunneling equipment of tunneling communication channel originating reception by means of flexible sleeve according to claim 8, wherein said step of S2 further comprises installing a flexible originating sleeve system, assembling a flexible receiving sleeve system, and detecting the sealing effect of the flexible receiving sleeve system and performing attitude adjustment of the tunneling device; adjusting the attitude of the tunneling device comprises adjusting the moving device to enable the tunneling device to be close to a starting position of the tunnel portal; and simultaneously, checking that all systems of the tunneling device and the matched equipment are in a complete normal working state.
10. The construction method of tunneling equipment for initial reception through a flexible sleeve according to claim 9, wherein in the step S4, the segment removal process comprises: and opening the connection between the first flexible annular sleeve and the first annular flange plate, and moving out the cut primary tunnel segment at the initial tunnel portal through a hoisting device which is pre-installed inside the primary tunnel at the initial tunnel portal.
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