CN108425682A - A kind of shield tool changing ground-connecting-wall ruggedized construction and reinforced construction method - Google Patents
A kind of shield tool changing ground-connecting-wall ruggedized construction and reinforced construction method Download PDFInfo
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- CN108425682A CN108425682A CN201810206454.2A CN201810206454A CN108425682A CN 108425682 A CN108425682 A CN 108425682A CN 201810206454 A CN201810206454 A CN 201810206454A CN 108425682 A CN108425682 A CN 108425682A
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- wall
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- tool changing
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
Abstract
The present invention relates to tunnel and underground engineering construction technical fields,More particularly to a kind of shield tool changing ground-connecting-wall ruggedized construction and reinforced construction method,The shield tool changing ground-connecting-wall ruggedized construction of the present invention includes the ground-connecting-wall being arranged on tunnel piercing route,The ground-connecting-wall is plain concrete ground-connecting-wall,And the ground-connecting-wall is arranged at the length position for carrying out tool changing after shield machine driving,By the way that ruggedized construction is arranged on shield driving route in advance,So that carrying out cutter changing when shield driving is at the ruggedized construction,Due to being disposed with ruggedized construction,Therefore normal pressure tool changing can be carried out to cutter,To with simple and efficient possessed by normal pressure tool changing,The advantages that at low cost,Simultaneously,After arranging ruggedized construction,Be not in that excavation face collapses during cutter changing,The problems such as surface subsidence,Ensure surrounding enviroment along tunnel,Effectively prevent the generation of quality accidents.
Description
Technical field
The present invention relates to tunnel and underground engineering construction technical field, more particularly to a kind of shield tool changing ground-connecting-wall reinforces knot
Structure and reinforced construction method.
Background technology
Currently, with the continuous development of China's infrastructure facility, city underground is also developed rapidly, city underground
Running tunnel majority carries out tunneling construction using shield machine.However, when penetrating ground distance of shield is longer or passes through ground
When layer abrasion stratum contour there are sandy gravel, shield cutter abrasion will be very serious, therefore, it has in a planned way to cutter
It is replaced.The common method of shield tool changing at present is normal pressure tool changing and tool changing with pressure.
The normal pressure tool changing method that although opens a position is simple and efficient, but is applicable in geology and is limited in scope, and is only applicable to front of tunnel heading
The extraordinary condition of strata condition, and underground water is not abundant or the geological condition of underground water, applicable geology are not limited in scope,
During this geological conditions rarely occurs in constructing metro tunnel, therefore without representativeness.Tool changing generally use with pressure office
Portion's pneumatic process tool changing, uneven in soil property, native storehouse air pressure cannot maintain, it is difficult to provide the pressurize shape needed for tool changing
State, required air demand is big when tool changing, and compressed air conveying pipeline is long, and duration equipment and gas supply pipeline require high, have process numerous
The shortcomings of more, long in time limit, expensive；Meanwhile be susceptible to during cutter changing pressure abatement cause to jeopardize excavation face it is stable,
The problems such as easily surface subsidence being caused to collapse, and then surrounding enviroment along tunnel are influenced, since pressure reduction causes face to cave in
The accident to cause casualties happens occasionally；In addition, tool changing with pressure is more demanding to operating personnel, and the work under hyperbaric environment
It is larger to operating personnel's actual bodily harm, safety coefficient is low when making.
Invention content
The purpose of the present invention：It is not suitable for directly opening a position for formation condition in the prior art when carrying out normal pressure tool changing,
Using tool changing method with pressure, there are processes that more, of high cost, operating personnel requires high risk big, and easily causes surface subsidence and cause
The problem of quality accidents, provides a kind of shield tool changing ground-connecting-wall ruggedized construction and reinforced construction method, by advance in shield
Ruggedized construction is set on structure driving route so that cutter changing is carried out when shield driving is at the ruggedized construction, due to being disposed with
Ruggedized construction, therefore normal pressure tool changing can be carried out to cutter, to simple and efficient, at low cost etc. possessed by normal pressure tool changing
Advantage, meanwhile, be not in after arranging ruggedized construction, during cutter changing excavation face collapse, surface subsidence the problems such as, ensure
Surrounding enviroment along tunnel effectively prevent the generation of quality accidents.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes：
A kind of shield tool changing ground-connecting-wall ruggedized construction, including the ground-connecting-wall that is arranged on tunnel piercing route, the ground-connecting-wall are element
Concrete ground-connecting-wall when being needed replacing after shield machine cutter abrasion, is provided with the ground even at the tool changing position of driving route
Wall.
Shield machine is in tunneling process, and with the propulsion of tunnelling footage, tool wear is increasingly severe, after shield machine driving
It needs to carry out tool changing, the distance length of tool changing can rule of thumb judge the abrasion of cutter within the scope of a certain siding-to-siding block length
Amount, then determine shield into Excavation Length carry out cutter changing, to can determine that shield machine driving after carry out tool changing position, because
This determines tool change position, and the ground-connecting-wall is arranged makes the installation position of ground-connecting-wall and shield machine driving laggard at this location
The length position of row tool changing is corresponding, to setting ground-connecting-wall position carry out normal pressure tool changing, avoid the occurrence of excavation face collapse,
The problems such as surface subsidence, ensures construction safety.
Set ground-connecting-wall to plain concrete ground-connecting-wall so that shield machine work progress before and after the tool changing of ground-connecting-wall position
In, normal pressure tool changing can not only be carried out, ensures construction safety, and can also directly be tunneled in ground-connecting-wall, guarantee is continuously applied
Work process will not additionally increase other processes.
By the shield tool changing ground-connecting-wall ruggedized construction of this programme, by directly pouring the form of construction work of ground-connecting-wall wall,
Reach and the tunnel soil body at shield machine tool changing position reinforced, eliminate to bad ground carry out geological prospecting be arranged pile body into
The complex process that row is reinforced on a large scale, construction efficiency higher enable shield machine to be carried out in tunneling process by the reinforcing of ground-connecting-wall
Normal pressure tool changing achievees the purpose that stable, efficient, safety, economy and the quick tool changing that opens a position.
Preferably, the ground-connecting-wall includes the first width plain concrete wall for the reinforcing shield chain-drive section soil body, Yi Jizhi
The second width plain concrete wall of face is supportted, the position that tool changing is shut down in shield machine, institute is arranged in the first width plain concrete wall
Stating the second width plain concrete wall, closely the first width plain concrete wall front end is arranged.
Set ground-connecting-wall to include the first width plain concrete wall and the second width plain concrete wall structure type, shield pick
Into after entering the predetermined reinforcing position of the first width plain concrete wall, the direct tool changing under the protection of the second width plain concrete wall is real
Stabilization, efficient, safe and the economic tool changing that opens a position the purpose of existing exchanging knives process.
In the present solution, the first width plain concrete wall of setting and the second width plain concrete wall, the first width plain concrete wall are in
Tool change position, the effect for primarily serving and reinforcing shield head, stablize shield driving form, the second width plain concrete wall is for keeping area
Face is stablized, and ensures the safety of exchanging knives process.
Preferably, length of the ground-connecting-wall along tunnel piercing direction is the m of 1.2m~3.0, and width is the m of 6m~12, should
Ground-connecting-wall extends to ground from 2m below tunnel bottom.
The length of ground-connecting-wall（Thickness）It can be adjusted according to shield cutter thickness, be opened a position method compared to existing shield,
The structure type of this ground-connecting-wall is taken, controllability is strong, and easy to operate quick, method is easily promoted, safety coefficient higher.
Further, length of the ground-connecting-wall along tunnel piercing direction is the m of 1.6m~2.4, and width is the m of 8 m~9,
The ground-connecting-wall extends to ground from 1m below tunnel bottom.
Further, when ground-connecting-wall is set as the structure type of the first width plain concrete wall and the second width plain concrete wall
When, the thickness of unilateral every width ground-connecting-wall is 0.8m ~ 1.2m.
Preferably, the position that opens a position is preset on the shield machine, the position that opens a position needs replacing cutter with shield machine
Installation position is corresponding.
For construction stratum and shield driving parameter, shield cutter wear extent and true is calculated using experience and prediction technique
Surely it needs the position of tool changing, i.e., actively presets the position that opens a position on shield machine, making to open a position position and needs replacing the installation of cutter
Position is corresponding, carries out tool changing.
By pre-setting the position that opens a position, the normal construction of shield machine is not influenced, and reaches progress tool changing at ground-connecting-wall
When, by opening a position, position rapidly enters, and to quickly and efficiently complete tool changing work, utmostly ensures construction speed.
Accordingly, the present invention also provides a kind of reinforced construction methods of shield tool changing ground-connecting-wall, in arrangement such as above-mentioned institute
When the shield tool changing ground-connecting-wall ruggedized construction stated, carried out according to following construction procedures：
A, the position that opens a position is preset, according to construction stratum and shield driving parameter prediction shield cutter wear extent, determines that shield machine needs
The position of tool changing is wanted, to preset the position that opens a position on shield machine；
B, ground-connecting-wall is constructed, and at the length position that tool changing is carried out after being tunneled positioned at shield machine, is carried out on tunnel piercing route
Ground-connecting-wall is constructed；
C, shield machine driving is shut down afterwards in place, and shield machine is tunneled to after being provided with the position of ground-connecting-wall and shut down, at shield chain-drive section
In in the length range of ground-connecting-wall；
D, open a position detection and tool changing, operating personnel entered inside shield machine from the position that opens a position carry out normal pressure open a position tool changing,
Detection and maintenance work；
E, restore driving, after completing tool changing, close shield machine and open a position position and hatch door, while aerating promotes, until soil in native storehouse
Pressure is restored normal after with front stationary soil pressure and is promoted；
The sequence of construction of the step a and step b can be interchangeable.
Take above-mentioned construction method, preset in advance opens a position position, while carrying out ground-connecting-wall construction in advance, does not influence normal shield
Structure construction speed, normal pressure opens a position the method for tool changing in open a position tool changing and rock stratum with pressure compared to conventional ground slip casting pre-reinforcement, we
The construction method of case is influenced small by formation condition, belongs to normal pressure operation, and short time limit, expense are few, is avoided that and geological disaster etc. occurs
Security risk, it is also more secure for the life safety of construction worker.
This programme eliminates by pouring ground-connecting-wall wall in advance and carries out geological prospecting to bad ground and pile body position is arranged
Equal work progress are set, plays the role of stable surrounding soil, protection construction safety, keeps work progress more intuitive, easy, construct
Efficiency also higher.
Preferably, in the step c, the ground-connecting-wall includes the first width plain concrete wall and the second width plain concrete wall,
The front end setting of the second width plain concrete wall closely the first width plain concrete wall drilling direction, shield machine is by described first
After the completion of width plain concrete wall driving and shield head enter the first width plain concrete wall range, cutter head of shield machine reaches preset
Stop driving after at tool change position.
Plain concrete ground-connecting-wall is set and stablizes surrounding soil, the first width plain concrete wall plays the role of retaining wall, makees simultaneously
For the shield reinforcing wall of stop position, in shield driving after shield cutter reaches the shutdown of ground-connecting-wall precalculated position, second
Width plain concrete wall plays the role of firm face and the front soil body is avoided to cave in.Serve as the plain concrete wall of retaining wall effect
Body makes soil strength in front of cutterhead be strengthened, and prevents the geological disasters such as face avalanche, while shield machine can be directly mixed in element
It being tunneled in solidifying soil, entire exchanging knives process is small on shield machine and surrounding soil influence, more excellent compared to other cutter replacing method reinforcement effects,
It can directly keep stablizing in driving exterior wall after tool changing, so that normal pressure is opened a position tool changing suitable for various after reinforcing face
Topographic features.
Preferably, in the step b, using hydraulic grab cell wall machine trenching construction, bentonite system is equipped with when slot section is excavated
Make mud off, and is poured by the way of double duct subaqueous concreting.
Further, when being irrigated using double duct, first arrangement pours frame, keeps pouring frame accurately in place, to right
Conduit is accurately positioned, and ensures concrete pouring quality.
Preferably, in the step b, when constructing to ground-connecting-wall, include the following steps：
B1, guide channel is excavated, and carries out construction of guide wall；
B2, trenching construction are simutaneously arranged junction block and carry out clear slot；
B3, concrete is poured, before pouring plain concrete, detects groove depth first, it is ensured that at groove depth, be then placed in conduit and poured
It builds；
B4, mud discharge.
Further, it when construction of guide wall, is carried out using segmentation, and led in every width and spout hole is set on wall.
Preferably, during the trenching construction of the step b2, it is disposed with circulating tank and mud pit, the circulating tank is used for
The mud being pumped into grooving is put, the mud pit includes sedimentation basin, mud production unit and cycling element.
Further, the cycling element includes cyclone and vibrating screen.
In ground-connecting-wall grooving digging process, to ensure that grooving is stablized, fresh mud is continuously supplied into groove,
There is a large amount of mud emission to come out, it is therefore desirable to carry out mud making, while to mud in concreting process under water simultaneously
Slurry is recycled and is handled useless slurry, it is ensured that safety, quality, progress and the civilized construction of construction of diaphragm wall.
Preferably, in the step b4, discharge or regeneration treatment are carried out after mud discharge.
Compared with prior art, beneficial effects of the present invention：
1, shield tool changing ground-connecting-wall ruggedized construction of the invention presets the position that opens a position on shield machine in advance, can be with shield-tunneling construction
It is carried out at the same time, does not influence shield-tunneling construction progress, normal pressure is opened in open a position tool changing and rock stratum with pressure compared to conventional ground slip casting pre-reinforcement
The method of storehouse tool changing, it is small that the present invention by ruggedized construction so that tool changing work is influenced by formation condition, belongs to normal pressure operation, duration
Short, expense is few, avoids the security risk of geological disaster, the personal safety of energy effective guarantee construction worker；
2, it by arranging ground-connecting-wall on tunnel piercing route, eliminates and geological prospecting is carried out to bad ground and then pile body is set
The complex process of position plays the role of stable surrounding soil by ground-connecting-wall, protects construction safety, keeps work progress more straight
It sees, be easy, construction efficiency higher；
3, plain concrete ground-connecting-wall plays the role of stable surrounding soil, while playing retaining wall, sets ground-connecting-wall to
Structure type including the first width plain concrete wall and the second width plain concrete wall, the first width plain concrete wall are reinforced as shield
Wall, when shield driving reaches the second width plain concrete wall until shield cutter, the second width plain concrete wall plays the firm palm
Sub- face and the effect for avoiding the front soil body from caving in, prevent the geological disasters such as face avalanche；
4, ground-connecting-wall is set to the structure type of plain concrete ground-connecting-wall so that shield machine is before and after the tool changing of ground-connecting-wall position
In work progress, normal pressure tool changing can not only be carried out, ensures construction safety, and can also directly be tunneled in ground-connecting-wall, is protected
Continuous work progress is demonstrate,proved, other processes will not be additionally increased, exchanging knives process is small on shield machine and surrounding soil influence, compares other
Cutter replacing method reinforcement effect is more excellent, can directly keep stablizing in driving exterior wall after tool changing, make after reinforcing face
The normal pressure tool changing that opens a position is adapted to various topographic features；
5, the length of ground-connecting-wall（Thickness）It can be adjusted according to shield cutter thickness, open a position method, adopt compared to existing shield
The structure type of this ground-connecting-wall is taken, controllability is strong, and easy to operate quick, method is easily promoted, safety coefficient higher.
Description of the drawings：
Fig. 1 is the tool changing schematic diagram that opens a position of shield tool changing ground-connecting-wall ruggedized construction in the present invention.
Fig. 2 is the tool changing front view that opens a position of shield tool changing ground-connecting-wall ruggedized construction in Fig. 1.
Fig. 3 is the tool changing cross-section diagram that opens a position of shield tool changing ground-connecting-wall ruggedized construction in the present invention.
Fig. 4 is the construction process figure of shield tool changing ground-connecting-wall reinforced construction method in the present invention.
It is marked in figure：1- ground-connecting-walls, 11- the first width plain concrete walls, 12- the second width plain concrete walls, the ground 2-, 3- shields
Structure machine, 4- shield tunnels design axis.
Specific implementation mode
With reference to test example and specific implementation mode, the present invention is described in further detail.But this should not be understood
It is only limitted to embodiment below for the range of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that the content of present invention is realized
The range of invention.
Embodiment 1
As shown in Figure 1, Figure 2 and Figure 3, shield tool changing ground-connecting-wall ruggedized construction, including the ground being arranged on tunnel piercing route connect
Wall 1, which is plain concrete ground-connecting-wall, when being needed replacing after shield machine cutter abrasion, in the tool changing portion of driving route
It is provided with the ground-connecting-wall 1 at position.
Shield machine is in tunneling process, and with the propulsion of tunnelling footage, tool wear is increasingly severe, after shield machine driving
It needs to carry out tool changing, the distance length of tool changing can rule of thumb judge the abrasion of cutter within the scope of a certain siding-to-siding block length
Amount, then determine shield into Excavation Length carry out cutter changing, to can determine that shield machine driving after carry out tool changing position, because
This determines tool change position, and the ground-connecting-wall is arranged makes the installation position of ground-connecting-wall and shield machine driving laggard at this location
The length position of row tool changing is corresponding, to setting ground-connecting-wall position carry out normal pressure tool changing, avoid the occurrence of excavation face collapse,
The problems such as surface subsidence, ensures construction safety.
Set ground-connecting-wall to plain concrete ground-connecting-wall so that shield machine work progress before and after the tool changing of ground-connecting-wall position
In, normal pressure tool changing can not only be carried out, ensures construction safety, and can also directly be tunneled in ground-connecting-wall, guarantee is continuously applied
Work process will not additionally increase other processes.
Shield tool changing ground-connecting-wall ruggedized construction through this embodiment, by the construction party for directly pouring ground-connecting-wall wall
Formula reaches and is reinforced to the tunnel soil body at shield machine tool changing position, eliminates and carries out geological prospecting setting stake to bad ground
The complex process that body is reinforced, construction efficiency higher enable shield machine to be carried out often in tunneling process by the reinforcing of ground-connecting-wall
Tool changing is pressed, achievees the purpose that stable, efficient, safety, economy and the quick tool changing that opens a position.
As one such preferred embodiment, ground-connecting-wall 1 designs axis along the center line of tunneling direction with shield tunnel
Line 4 is on the same perpendicular.
As one such embodiment, the ground-connecting-wall 1 includes the first width for the reinforcing shield chain-drive section soil body
Plain concrete wall 11, and the second width plain concrete wall 12 of face is supported, the setting of the first width plain concrete wall 11 exists
Shield machine 3 shuts down the position of tool changing, and closely 11 front end of the first width plain concrete wall is arranged the second width plain concrete wall 12,
After the driving of shield machine 3 enters the predetermined reinforcing position of the first width plain concrete wall 11, under the protection of the second width plain concrete wall 12
The stabilization of exchanging knives process, efficient, safe and the economic tool changing that opens a position purpose, the first width plain concrete wall are realized in direct tool changing
11 are in tool change position, and the effect for primarily serving and reinforcing shield head, stablize shield driving form, the second width plain concrete wall 12 is used for
It keeps face to stablize, ensures the safety of exchanging knives process.
As one such embodiment, length of the ground-connecting-wall 1 along tunnel piercing direction is the m of 1.2m~3.0,
Width is the m of 6m~12, which extends to ground 2 from 2m below tunnel bottom.
As one such preferred embodiment, length of the ground-connecting-wall 1 along tunnel piercing direction is 1.6m~2.4
M, width are the m of 8 m~9, which extends to ground 2 from 1m below tunnel bottom.
Further, when ground-connecting-wall 1 is set as the structure of the first width plain concrete wall 11 and the second width plain concrete wall 12
When form, the thickness of unilateral every width ground-connecting-wall is 0.8m ~ 1.2m.
As one such embodiment, the position that opens a position, position and the shield of opening a position are preset on the shield machine 3
The installation position that machine 3 needs replacing cutter is corresponding.
For construction stratum and shield driving parameter, shield cutter wear extent and true is calculated using experience and prediction technique
Surely it needs the position of tool changing, i.e., actively presets the position that opens a position on shield machine, making to open a position position and needs replacing the installation of cutter
Position is corresponding, carries out tool changing.
Embodiment 2
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the reinforced construction method of shield tool changing ground-connecting-wall, the shield in arranging such as embodiment 1
When structure tool changing ground-connecting-wall ruggedized construction, carried out according to following construction procedures：
A, the position that opens a position is preset, according to construction stratum and shield driving parameter prediction shield cutter wear extent, determines that shield machine 3 needs
The position of tool changing is wanted, to preset the position that opens a position on shield machine 3；
B, ground-connecting-wall 1 is constructed, and at the position for carrying out tool changing after the driving of shield machine 3, carries out ground on tunnel piercing route
Even wall 1 is constructed；
C, the driving of shield machine 3 is shut down afterwards in place, and the driving of shield machine 3 is shut down to after being provided with the position of ground-connecting-wall 1, shield machine 3
Portion is in the length range of ground-connecting-wall 1；
D, open a position detection and tool changing, operating personnel from the position that opens a position enter the inside of shield machine 3 carry out normal pressure open a position tool changing,
Detection and maintenance work；
E, restore driving, after completing tool changing, close shield machine 3 and open a position position and hatch door, while aerating promotes, until soil in native storehouse
Pressure is restored normal after with front stationary soil pressure and is promoted；
The sequence of construction of the step a and step b can be interchangeable.
As one such embodiment, in the step c, the ground-connecting-wall 1 includes the first width plain concrete wall 11
With the second width plain concrete wall 12, the second width plain concrete wall 12 is closely before 11 drilling direction of the first width plain concrete wall
End set, the first width plain concrete wall 11 is tunneled completion to shield machine 3 and shield head enters the first width plain concrete
After 11 range of wall, cutter head of shield machine stops driving after reaching at preset tool change position.
As one such embodiment, in the step b, using hydraulic grab cell wall machine trenching construction, slot section is opened
It is equipped with bentonite when digging and makes mud off, and is poured by the way of double duct subaqueous concreting, using double
When conduit is irrigated, first arrangement pours frame, keeps pouring frame accurately in place, to be accurately positioned to conduit, ensures coagulation
Native pouring quality.
As one such embodiment, in the step b, when constructing to ground-connecting-wall 1, include the following steps：
B1, guide channel is excavated, and carries out construction of guide wall；
B2, trenching construction are simutaneously arranged junction block and carry out clear slot；
B3, concrete is poured, before pouring plain concrete, detects groove depth first, it is ensured that at groove depth, be then placed in conduit and poured
It builds；
B4, mud discharge.
Further, it when construction of guide wall, is carried out using segmentation, and led in every width and spout hole is set on wall.
As one such embodiment, during the trenching construction of the step b2, it is disposed with circulating tank and mud
Pond, for putting the mud being pumped into grooving, the mud pit includes sedimentation basin, mud production unit and follows the circulating tank
Ring element, the cycling element include cyclone and vibrating screen.
In ground-connecting-wall grooving digging process, to ensure that grooving is stablized, fresh mud is continuously supplied into groove,
There is a large amount of mud emission to come out, it is therefore desirable to carry out mud making, while to mud in concreting process under water simultaneously
Slurry is recycled and is handled useless slurry, it is ensured that safety, quality, progress and the civilized construction of construction of diaphragm wall.
As one such embodiment, in the step b4, discharge or regeneration treatment are carried out after mud discharge.
As one such embodiment, in the step d, following steps are specifically included：
D1, open a position before forced ventilating and gas detection；
After d2, gas detection qualification, it is gradually opened hatch door, face is primarily determined safely first, it is ensured that after safety and stability
Stop the work of foaming system；
D3, operating personnel replace cutter from warehouse entry inspection inside shield machine, replace standard according to hobboing cutter, scraper, it then follows " tear a dress open
One " tool changing principle, when each group personnel's tool changing, should be used uniformly " being replaced by arm " or " from outside to inside " or " from inside to outside " etc. change
Knife sequence；
D4, tool changing operation are completed, and operating personnel all withdraws rear special messenger and checked comprehensively cutter and Tu Cang and cutterhead situation.
Claims (10)
1. a kind of shield tool changing ground-connecting-wall ruggedized construction, which is characterized in that including the ground-connecting-wall being arranged on tunnel piercing route,
The ground-connecting-wall is plain concrete ground-connecting-wall, when being needed replacing after shield machine cutter abrasion, at the tool changing position of driving route
It is provided with the ground-connecting-wall.
2. shield tool changing ground-connecting-wall ruggedized construction according to claim 1, which is characterized in that the ground-connecting-wall includes being used for
First width plain concrete wall of the reinforcing shield chain-drive section soil body, and support face the second width plain concrete wall, described the
The position that tool changing is shut down in shield machine, the second width plain concrete wall closely the first width element coagulation is arranged in one width plain concrete wall
Cob wall front end is arranged.
3. shield tool changing ground-connecting-wall ruggedized construction according to claim 1, which is characterized in that the ground-connecting-wall is along tunnel digging
Length into direction is the m of 1.2m~3.0, and width is the m of 6m~12, which extends to ground from 2m below tunnel bottom
Face.
4. the shield tool changing ground-connecting-wall ruggedized construction according to one of claim 1-3, which is characterized in that on the shield machine
It is preset with the position that opens a position, the position that opens a position is corresponding with the installation position that shield machine needs replacing cutter.
5. a kind of reinforced construction method of shield tool changing ground-connecting-wall, which is characterized in that in arrangement as described in one of claim 1-4
Shield tool changing ground-connecting-wall ruggedized construction when, according to following construction procedures carry out：
A, the position that opens a position is preset, according to construction stratum and shield driving parameter prediction shield cutter wear extent, determines that shield machine needs
The position of tool changing is wanted, to preset the position that opens a position on shield machine；
B, ground-connecting-wall is constructed, and at the length position that tool changing is carried out after being tunneled positioned at shield machine, is carried out on tunnel piercing route
Ground-connecting-wall is constructed；
C, shield machine driving is shut down afterwards in place, and shield machine is tunneled to after being provided with the position of ground-connecting-wall and shut down, at shield chain-drive section
In in the length range of ground-connecting-wall；
D, open a position detection and tool changing, operating personnel entered inside shield machine from the position that opens a position carry out normal pressure open a position tool changing,
Detection and maintenance work；
E, restore driving, after completing tool changing, close shield machine and open a position position and hatch door, while aerating promotes, until soil in native storehouse
Pressure is restored normal after with front stationary soil pressure and is promoted；
The sequence of construction of the step a and step b can be interchangeable.
6. the reinforced construction method of shield tool changing ground-connecting-wall according to claim 5, which is characterized in that in the step c,
The ground-connecting-wall includes the first width plain concrete wall and the second width plain concrete wall, the second width plain concrete wall closely first
The front end of width plain concrete wall drilling direction is arranged, and the first width plain concrete wall is tunneled completion and shield head by shield machine
After portion enters the first width plain concrete wall range, cutter head of shield machine stops driving after reaching at preset tool change position.
7. the reinforced construction method of shield tool changing ground-connecting-wall according to claim 5, which is characterized in that in the step b,
It is equipped with bentonite using hydraulic grab cell wall machine trenching construction, when slot section is excavated and makes mud off, and is underwater using double duct
The mode of concrete perfusion is poured.
8. the reinforced construction method of the shield tool changing ground-connecting-wall according to one of claim 5-7, which is characterized in that the step
In rapid b, when constructing to ground-connecting-wall, include the following steps：
B1, guide channel is excavated, and carries out construction of guide wall；
B2, trenching construction are simutaneously arranged junction block and carry out clear slot；
B3, concrete is poured, before pouring plain concrete, detects groove depth first, it is ensured that at groove depth, be then placed in conduit and poured
It builds；
B4, mud discharge.
9. the reinforced construction method of shield tool changing ground-connecting-wall according to claim 8, which is characterized in that the step b2's
During trenching construction, it is disposed with circulating tank and mud pit, the circulating tank is described for putting the mud being pumped into grooving
Mud pit includes sedimentation basin, mud production unit and cycling element.
10. the reinforced construction method of shield tool changing ground-connecting-wall according to claim 8, which is characterized in that the step b4
In, carry out discharge or regeneration treatment after mud discharge.
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