CN107165645A - Major diameter slurry shield tunnel originates portal sealing device - Google Patents
Major diameter slurry shield tunnel originates portal sealing device Download PDFInfo
- Publication number
- CN107165645A CN107165645A CN201710607041.0A CN201710607041A CN107165645A CN 107165645 A CN107165645 A CN 107165645A CN 201710607041 A CN201710607041 A CN 201710607041A CN 107165645 A CN107165645 A CN 107165645A
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- Prior art keywords
- steel loop
- portal
- wire brush
- rubber slab
- buried
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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
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
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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
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0671—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end with means for consolidating the rock in front of the shield by injection of consolidating substances through boreholes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
Portal sealing device is originated the invention discloses major diameter slurry shield tunnel, wherein, including being fixed with extension portal steel loop on agent structure, the pre-buried steel loop being embedded in the agent structure, the pre-buried steel loop, the extension portal steel loop is provided with waterproof construction, the waterproof construction is to be set along extension portal steel loop axially spaced-apart and along first of the cord rubber slab and second cord rubber slab of extension portal steel loop radial arrangement, it is characterised in that：The extension portal steel loop that first of cord rubber back is fixed between elastic waterstop layer, first of cord rubber slab and second the cord rubber slab is provided with injected hole.Major diameter slurry shield tunnel of the present invention originates the water shutoff ability that portal sealing device has, so as to improve the sealing of whole portal, it can effectively prevent occurring prominent mud, water burst, the generation of mud leakage phenomenon in shield launching tunneling process, to ensure shield launching driving safety.
Description
Technical field
The present invention relates to shield tunnel project technical field, and in particular to a kind of major diameter slurry shield tunnel originates portal
Sealing device.
Background technology
China's urban population is intensive, and traffic above-ground situation mouthful benefit is nervous.Alleviate urban ground traffic pressure, China to improve
Densely populated bustling big city Efforts To Develop underground engineering, shield construction is that urban subway tunnel, vcehicular tunnel etc. are built
Main flow construction method.The shield that China uses in underground engineering at present is broadly divided into earth pressure balanced shield, EPBS and mud and water balance shield
Structure, wherein the slurry balance shield soil body in front of the mud stabilization in front of shield is cut during soil body propulsion by can adjust pressure,
Sealing state is completely in whole tunneling process because of slurry balance shield again, and its stability to stratum is better than soil pressure shield
Structure, so slurry balance shield relies on its more preferable stability and more reliable security, also more comes about welcome, it has also become big
Type wears Jiang Yuehai tunnels and the indispensable key technology of metro construction.With China's city underground, diversion tunnel especially
It is that large-scale river of crossing is crossed the river the extensive construction of Tunnel Engineering, the application of slurry shield tunnel technology is more and more extensive.Built
Yangtze River Tunnel, first stage of middle line for South-north water diversion tunnel, Hangzhou Qianjiang tunnel, wide Shenzhen and Hong Kong Line for Passenger Transportation lion are passed through by Shanghai and Nanjing, Wuhan
The engineerings such as Zi Yang tunnels are all constructed using slurry shield, the subway in the multiple cities built, urban road tunnel more
In rivers Tunnel Engineering, it is ready for or uses slurry shield engineering method.Slurry shield tunnel technology turns into China gravely
One of indispensable key technology of lower engineering construction field.
In slurry shield construction, it is one of material risk source of shield construction that shield launching, which enters hole, especially in underground
Water enriches, when being constructed in the high geological state of level of ground water, and the sealing property to shield launching portal requires high.To ensure shield
Structure is originated into hole safely and fast, and current shield launching portal sealing prevents shield launching generally using extension portal sealing device
There is prominent mud, water burst, mud leakage in tunneling process (before shield body is not completely into stratum), to ensure shield launching driving peace
Entirely.And above-mentioned extension portal sealing device, for larger-diameter slurry shield originates driving, due to slurry shield driving
The mode of slagging tap of Shi Caiyong muddy water circulation, maintains excavation face stable using special mud by pressurizeing.Slurry shield hopper dredger is opened
Tunneling process is originated, because hopper dredger needs to build pressure, is caused in shield launching tunneling process, portal sealing often occurs more
Serious spillage phenomenon so that shield hopper dredger can not normally build pressure, excavation face stabilization, ground settlement, shield launching driving attitude
It is difficult to control to, increases that face caves in, the larger sedimentation of earth's surface, prominent mud gush the construction risk of sand, water burst.
In addition, in some shield launchings and portal position relationship more special engineering, such as shield machine axially and
All there is certain angle on longitudinal direction with portal.Such as using conventional portal sealing means, the sealing effectiveness of portal can not be ensured,
Slurry shield hopper dredger starts to originate tunneling process, because hopper dredger needs to build pressure, causes in shield launching tunneling process, portal is close
Often there is more serious spillage phenomenon in envelope so that shield hopper dredger can not normally build pressure, excavation face stabilization, ground settlement, shield
Structure originates driving attitude and is difficult to control to, and increases that face caves in, the larger sedimentation of earth's surface, prominent mud gush the construction risk of sand, water burst.
The content of the invention
In order to more preferably solve it is above-mentioned the problems of in the prior art, this uses a kind of major diameter slurry shield of new offer
Structure tunnel originates portal sealing device.
In order to realize foregoing invention purpose, the technical scheme is that：A kind of major diameter slurry shield tunnel originates hole
Door seal device, wherein, including on agent structure, the pre-buried steel loop being embedded in the agent structure, the pre-buried steel loop admittedly
Surely there is extension portal steel loop, the extension portal steel loop is provided with waterproof construction, and the waterproof construction is along extension portal steel loop
Axially spaced-apart is set and along first of the cord rubber slab and second cord rubber slab of extension portal steel loop radial arrangement, it is special
Levy and be：First of cord rubber back is fixed with elastic waterstop layer, first of cord rubber slab and second
Extension portal steel loop between cord rubber slab is provided with injected hole.
One of shield tail only pulpboard is provided with pre-buried steel loop on front side of first of cord rubber slab, the shield tail stops slurry
Plate is distributed along pre-buried portal steel loop even circumferential, and each shield tail stops sealing welding between pulpboard, and the shield tail is stopped the back side on pulpboard and consolidated
Fixed flexible sealing layer.
At least one wire brush, the wire brush edge are provided with pre-buried steel loop on front side of first of cord rubber slab
Sealing welding between pre-buried portal steel loop even circumferential distribution, each wire brush, the wire brush back side is fixed with elastic waterstop layer.
Portal sealing device, including body junction are originated the invention also discloses another major diameter slurry shield tunnel
Structure, the pre-buried steel loop being embedded in the agent structure, extension portal steel loop, the extension hole are fixed with the pre-buried steel loop
Door steel loop is provided with waterproof construction, and the waterproof construction is to be set along extension portal steel loop axially spaced-apart and along extension portal steel loop
First of the cord rubber slab and second cord rubber slab of radial arrangement, it is characterised in that：The pre-buried steel loop and extension hole
It is provided with portal steel loop between door steel loop, the portal steel loop is provided with least one wire brush, and the wire brush is along portal steel loop
Even circumferential is distributed, sealing welding between each wire brush, and the wire brush back side is fixed with elastic waterstop layer, the wire brush and
Portal steel loop between first of cord rubber slab is provided with greasing hole.
The wire brush is that the spacing between twice, the twice wire brush is 70-100cm, and the wire brush is obliquely
On the inwall for the portal steel loop being connected to, the angle that the wire brush enters hole direction with portal steel loop is 40 degree to 70 degree.
The shield tail is stopped on the inwall for the pre-buried portal steel loop that pulpboard is obliquely connected to, the shield tail stop pulpboard with it is pre-buried
The angle that portal steel loop enters hole direction is 40 degree to 70 degree.
Twice wire brush is provided with front side of first of cord rubber slab, it is pre-buried that the wire brush is obliquely connected to
On the inwall of portal steel loop, the angle that the wire brush enters hole direction with pre-buried portal steel loop is 40 degree to 70 degree.
The elastic waterstop layer is more than or equal to 35kg/m3 high-density sponge for density.
Elastic waterstop layer longitudinal cross-section is shaped as triangle or trapezoidal.The shape of the elastic waterstop layer longitudinal cross-section
Shape and size are varied from because shield machine shield shell is different from the spacing of portal.
With the ratio after compression it is 1.6-2.0 before the elastic waterstop layer compression, so as to prevent from damaging its curtain for being fixed
Cloth rubber slab, shield tail stop pulpboard or wire brush.
Steel loop on front side of the elastic waterstop layer is provided with elastic waterstop layer keeper, for elastic waterstop layer is controlled
Cord rubber slab, shield tail stop the space that pulpboard or wire brush and steel loop and sealing layer keeper are formed after compression where it
It is interior, prevent elastic waterstop layer from being come off in shield tunneling process.
Beneficial effect
1st, major diameter slurry shield tunnel of the present invention originates the water shutoff ability that portal sealing device has, so as to improve whole hole
The sealing of door.Stop pulpboard or wire brush rear increase elastic waterstop layer in cord rubber slab or shield tail in the present invention, to cord
Rubber slab or shield tail stop one bounce of pulpboard or wire brush so that cord rubber slab or shield tail stop pulpboard or wire brush and shield body
Face is preferably combined, and also has certain water stopping function in itself by the elastic waterproof layer that high-density sponge is constituted, so that
There is water shutoff well to stop slurry ability for portal sealing, improves the sealing of whole portal, effectively can prevent shield launching from digging
Occur prominent mud, water burst, the generation of mud leakage phenomenon during entering, to ensure shield launching driving safety.
2nd, to originate portal sealing device easy for installation in major diameter slurry shield tunnel of the present invention, economical and practical, is easy to promote.
Stop the technical scheme of pulpboard or wire brush increase by high-density sponge elastic waterstop layer in cord rubber slab or shield tail in the present invention
It can reach and originate the requirement of portal hermetic seal slurry seal, it is economical and practical and easy for installation, it is easy to promote the use of.
Brief description of the drawings
Fig. 1 is the structural representation for originating portal sealing device in the prior art；
Fig. 2 is the structural representation that embodiment 1 originates portal sealing device；
Fig. 3 is that embodiment 1 originates portal sealing device use state structural representation；
Fig. 4 is shield machine and to originate portal plan positional relationship schematic diagram in embodiment 1；
Fig. 5 is shield machine and to originate portal vertical section position relationship schematic diagram in embodiment 1；
Fig. 6 is shield machine and to originate portal cross-sectional location relation schematic diagram in embodiment 1；
Fig. 7 is elastic waterstop layer shaped upper part and fixed position schematic diagram in embodiment 1；
Fig. 8 is elastic waterstop layer middle part shape and fixed position schematic diagram in embodiment 1；
Fig. 9 is elastic waterstop layer lower shape and fixed position schematic diagram in embodiment 1；
Figure 10 is the structural representation that embodiment 2 originates portal sealing device；
Figure 11 is the use state structural representation that embodiment 2 originates portal sealing device；
Figure 12 is the structural representation that embodiment 3 originates portal sealing device；
Figure 13 is the use state structural representation that embodiment 3 originates portal sealing device
Figure 14 is the structural representation that embodiment 4 originates portal sealing device；
Figure 15 is the use state structural representation that embodiment 4 originates portal sealing device；
In figure, agent structure 1, pre-buried steel loop 2, extension portal steel loop 3, first cord rubber slab 4, second cord rubber
Plate 5, elastic waterstop layer 6, injected hole 7, elastic waterstop layer keeper 8, shield tail stop pulpboard 9, wire brush 10, portal steel loop 11, note
Fat hole 12, shield cutter 13, shield shield body 14.
Embodiment
Below in conjunction with the accompanying drawings, by specific embodiment, the invention will be further described.Following examples are descriptive
, it is not limited, it is impossible to which protection scope of the present invention is limited with this.
The back side in the present invention refers to the side of institute's incline direction after first of cord rubber slab compression, preceding to refer to shield
Structure enters hole direction of propulsion.
Embodiment 1
Major diameter slurry shield tunnel in the present embodiment originates portal sealing device and covers Xiang River Tunnel Engineering in Hejiang of Hengyang City
Use, Hejiang of Hengyang City set Xiang River Tunnel Engineering is located at Hengyang City city the north, and eastern bank is Zhuhui District, and west bank is Shigu District, place
In Xiang River, fork-like farm tool used in ancient China water, the water charge for remittance mouthful position of water three is steamed, distance steams water charge for remittance mouthful downstream about 2.4km, apart from fork-like farm tool used in ancient China water charge for remittance mouthful upstream about
At 0.2km, shield tunnel is using double holes pattern, using 11710mm major diameter gas cushion type mud water Shield Construction Method Used.Pipe
Piece internal diameter 10.3m, external diameter 11.3m, 8.5 × 4.5m of building line are divided into the line of north and south two and pass through Xiang River, wherein main line list hole adds up to
It is about 1867.2m.
Launching shaft is located at the eastern bank of Hengyang City Zhuhui District Xiang River, and received well is located at Hengyang City Shigu District Xiang River west bank.Shield
Structure originates portal apart from Xiang River only 100m, and rich groundwater, level of ground water is high, and predominantly stratum crack artesian water, to shield
The sealing property for originating portal requires high.And it is more special with portal position relationship that this Project Shield machine is originated, referring to figure
All there is certain angle in the 4th, Fig. 5, Fig. 6, shield machine, on horizontal and vertical with portal such as using conventional portal sealing side
Formula, referring to Fig. 1, can not ensure the sealing effectiveness of portal.
Referring to Fig. 2, Fig. 3, Fig. 7-Fig. 9, a kind of major diameter slurry shield tunnel originates portal sealing device, including body junction
Structure 1, the pre-buried steel loop 2 being embedded in the agent structure 1, extension portal steel loop 3 is fixed with the pre-buried steel loop 2, it is described
Extend portal steel loop 3 and be provided with waterproof construction, the waterproof construction is to be set along the axially spaced-apart of extension portal steel loop 3 and along extension
First of the cord rubber slab 4 and second cord rubber slab 5 of the radial arrangement of portal steel loop 3, it is characterised in that：Described first
The back side of cord rubber slab 4 is fixed with elastic waterstop layer 6, between first of cord rubber slab 4 and second cord rubber slab 5
Extension portal steel loop 3 be provided with injected hole 7.The elastic waterstop layer 6 is the high density sea that density is more than or equal to 35kg/m3
It is continuous.
The pre-buried steel loop 2 of the front side of elastic waterstop layer 6 is provided with elastic waterstop layer keeper 8, for elastic waterstop
The space that first cord rubber slab 4, pre-buried steel loop 2 and sealing layer keeper 8 are formed after compression of the control of layer 6 where it
It is interior, prevent elastic waterstop layer 6 from moving forward and coming off after shield tunneling process compression.
Ratio before the compression of elastic waterstop layer 6 and after compression is 1.6-2.0, so as to prevent from damaging its first fixed
Cord rubber slab 4.Ratio before the compression of the layer of elastic waterstop described in the present embodiment 6 and after compression is 1.8.
Filling sealing effectiveness needs, 6 longitudinal cross-section of elastic waterstop layer are originated in order to meet shield italic（Tunnel axis
Direction）Shape and size drawn according to the spacing for originating portal and shield machine shield shell, in the present embodiment, be because originating shield machine
Oblique line is originated, referring to Fig. 4, Fig. 5 and Fig. 6, and shield machine shield shell is not quite similar with originating the position relationship each position of portal, so bullet
Property sealing layer 6 longitudinal cross-section shape and size also differ, shield shield body 14 close to face use triangular-section bullet
Property sealing layer 6, away from face using trapezoid cross section elastic waterstop layer 6.Shield machine shield shell is with originating portal in the present embodiment
Spacing top be 134mm, bottom is 324mm, and both sides are 230mm in the middle part of left and right.In order that elastic waterstop layer 6 can be effective
Elastic water-proof performance is played, and does not damage sponge, elastic waterstop layer 6 is by three kinds of diameter average mark upper, middle and lower portion up and down different
Shape and size are installed.Referring to Fig. 7, elastic waterstop layer 6 longitudinal cross-section are shaped as triangle, wherein with first
The side length of side that elastic rubber slab 4 is contacted is 507mm, and the side length of side contacted after compression with pre-buried steel loop 2 is 424mm,
Remaining one side length of side is 321mm；Referring to Fig. 8, elastic waterstop layer 6 longitudinal cross-section are shaped as equilateral triangle, wherein with
The side length of side that first of elastic rubber slab 4 is contacted is 530mm, and the side length of side contacted after compression with pre-buried steel loop 2 is
447mm, remaining one side length of side is 447mm；Referring to Fig. 9, elastic waterstop layer 6 longitudinal cross-section are shaped as right-angled trapezium, its
In the side length of side that is contacted with first of elastic rubber slab 4 be 530mm, the side contacted with first of elastic rubber slab 4
The relative another side length of side of the length of side is 260mm, and the side length of side contacted with pre-buried steel loop 2 is 331mm, to prevent elastic waterstop
Layer 6 comes off in shield tunneling process, and elastic waterstop layer 6 shapes control is under cord rubber slab, using sandwich rubber（Or section of jurisdiction is close
Sealing）The side that elastic waterstop layer 6 is contacted with pre-buried steel loop 2 is pasted onto on pre-buried steel loop 2.Sponge uses sandwich rubber（Pipe
Piece glue is also useful, setting time is slightly long）When pasting sponge, answer sponge surface rougher, function of glue coating needs thickness, and bottom is not in 3mm.
Major diameter slurry shield of embodiment of the present invention tunnel originates portal sealing device sealing effectiveness
When shield machine air pushes through sponge area, speed can not be too fast, and pushes away fast uniform（4-5cm/min).Cutterhead, which is crossed, prevents elasticity
After the whole stress of sealing layer 6, check that not one piece comes off, and cord rubber slab and cutterhead（Shield shell）Contact is uniform, without obvious gap,
Shield launching tunnels portal substantially without spillage phenomenon, originates portal sealing situation preferably, shield launching driving is that foundation is bought securities with all one's capital
After driving, shield driving 5m, pressure 0.3-0.6bar can be built at the top of hopper dredger, can be achieved normally to build pressure after portal sealing.- 3 rings start
Driving completes portal closure to+3 rings, and+4 rings, which start normally to build, to be pressed off beginning synchronous grouting and normally tunnel, and is originated preceding 4 ring of driving and is dug
Enter parameter see the table below.
Embodiment 2
Referring to Figure 10, Figure 11, a kind of major diameter slurry shield tunnel originates portal sealing device, including agent structure 1, is embedded in
Extension portal steel loop 3, the extension portal steel are fixed with pre-buried steel loop 2, the pre-buried steel loop 2 in the agent structure 1
Ring 3 is provided with waterproof construction, and the waterproof construction is to be set along the axially spaced-apart of extension portal steel loop 3 and along extension portal steel loop 3
First of the cord rubber slab 4 and second cord rubber slab 5 of radial arrangement, the back side of first of cord rubber slab 4 are fixed
Set on flexible sealing layer 6, the extension portal steel loop 3 between first of cord rubber slab 4 and second cord rubber slab 5
There is injected hole 7.One of shield tail, which is provided with, on the pre-buried steel loop 2 of the front side of first of cord rubber slab 4 stops pulpboard 9, the shield
The axial distance that tail stops between pulpboard 9 and first of cord rubber slab 4 need to meet first of cord rubber slab 4 in shield shield body 14
Extruding upset rearward end must not stop the end of pulpboard 9 (preventing that only pulpboard cuts cord rubber slab) beyond the shield tail, it is axial away from
Stop first of cord rubber slab 4 and shield after the compression upset of pulpboard 9 according to for first of cord rubber slab 4, shield tail from determination
Tail stop the overlap joint of pulpboard 9 overlap length must not great Yu stop the 50% of pulpboard length, and ensure that shield tail is stopped pulpboard 9 and is pressurized after upset not shadow
Ring cutterhead top and hold together after excavation face to rotate.The shield tail is stopped pulpboard 9 and is distributed along the pre-buried even circumferential of steel loop 2, each shield tail stop pulpboard 9 it
Between sealing welding, the shield tail stop the back side on pulpboard 9 be fixed with elastic waterstop layer 6.Elastic waterstop layer 6 be density be more than or
High-density sponge equal to 35kg/m3.The shield tail is stopped on the inwall for the pre-buried steel loop 2 that pulpboard 9 is obliquely connected to, the shield
It is 40-70 degree that tail, which stops the angle that pulpboard 9 and pre-buried steel loop 2 enter hole direction, and shield tail described in the present embodiment stops pulpboard 9 and pre-buried steel
The angle that ring 2 enters hole direction is 70 degree.
The pre-buried steel loop of the front side of elastic waterstop layer 6 is provided with elastic waterstop layer keeper 8, for elastic waterstop layer
First of shield tail of cord rubber slab 4/ stops pulpboard 9, pre-buried steel loop 2 and sealing layer keeper 8 institute after compression of 6 controls where it
In the space of formation, prevent elastic waterstop layer 6 from moving forward and coming off after shield tunneling process compression.
Ratio before the compression of elastic waterstop layer 6 and after compression is 1.6-2.0, so as to prevent from damaging its first fixed
Cord rubber slab 4 or shield tail stop pulpboard 9.Ratio before the compression of the layer of elastic waterstop described in the present embodiment 6 and after compression is 1.6.
The shape and size of 6 longitudinal cross-section of elastic waterstop layer are obtained according to the spacing for originating portal and shield machine shield shell
Go out, in the present embodiment, the spacing for originating portal with shield machine shield shell is roughly the same, the shape of 6 longitudinal cross-section of elastic waterstop layer
Shape is identical with size, and elastic waterstop layer 6 longitudinal cross-section are shaped as triangle.
Embodiment 3
Referring to Figure 12, Figure 13, a kind of major diameter slurry shield tunnel originates portal sealing device, including agent structure 1, is embedded in
Extension portal steel loop 3, the extension portal steel are fixed with pre-buried steel loop 2, the pre-buried steel loop 2 in the agent structure 1
Ring 3 is provided with waterproof construction, and the waterproof construction is to be set along the axially spaced-apart of extension portal steel loop 3 and along extension portal steel loop 3
First of the cord rubber slab 4 and second cord rubber slab 5 of radial arrangement, it is characterised in that：First of cord rubber
The back side of plate 4 is fixed with elastic waterstop layer 6, the extension hole between first of cord rubber slab 4 and second cord rubber slab 5
Door steel loop 3 is provided with injected hole 7.At least one steel wire is provided with the pre-buried steel loop 2 of the front side of first of cord rubber slab 4
Brush 10, the wire brush 10 is distributed along the pre-buried even circumferential of steel loop 2, sealing welding between each wire brush 10, the wire brush 10
The back side is fixed with elastic waterstop layer 6.The elastic waterstop layer 6 is the high-density sponge that density is more than or equal to 35kg/m3.This reality
Apply in example, the front side of first of cord rubber slab 4 is provided with one of wire brush 10, what the wire brush 10 was obliquely connected to
On the inwall of pre-buried steel loop 2, the angle that the wire brush 10 enters hole direction with pre-buried steel loop 2 is institute in 40-70 degree, the present embodiment
It is 70 degree to state the angle that wire brush 10 and pre-buried steel loop 2 enter hole direction.Between the wire brush 10 and first of cord rubber slab 4
Axial distance determine according to for first of cord rubber slab 4, wire brush 10 be pressurized upset after first of cord rubber slab 4
The 50% of the length of wire brush 10 is cannot be greater than with the overlap joint overlap length of wire brush 10, and ensures that wire brush 10 is pressurized after upset not shadow
Ring cutterhead top and hold together after excavation face to rotate.
The pre-buried steel loop 2 of the front side of elastic waterstop layer 6 is provided with elastic waterstop layer keeper 8, for elastic waterstop
First of cord rubber slab 4 or wire brush 10, pre-buried steel loop 2 and sealing layer keeper 8 institute after compression of the control of layer 6 where it
In the space of formation, prevent elastic waterstop layer 6 from moving forward and coming off after shield tunneling process compression.
Ratio before the compression of elastic waterstop layer 6 and after compression is 1.6-2.0, so as to prevent from damaging its first fixed
Cord rubber slab 4 or wire brush 10.Ratio before the compression of the layer of elastic waterstop described in the present embodiment 6 and after compression is 2.0.
The shape and size of 6 longitudinal cross-section of elastic waterstop layer are obtained according to the spacing for originating portal and shield machine shield shell
Go out, in the present embodiment, the spacing for originating portal with shield machine shield shell is roughly the same, the shape of 6 longitudinal cross-section of elastic waterstop layer
Shape is identical with size, and being shaped as 6 longitudinal cross-section of elastic waterstop layer is trapezoidal.
Embodiment 4
Referring to Figure 14, Figure 15, a kind of major diameter slurry shield tunnel originates portal sealing device, including agent structure 1, is embedded in
Extension portal steel loop 3, the extension portal steel are fixed with pre-buried steel loop 2, the pre-buried steel loop 2 in the agent structure 1
Ring 3 is provided with waterproof construction, and the waterproof construction is to be set along the axially spaced-apart of extension portal steel loop 3 and along extension portal steel loop 3
First of the cord rubber slab 4 and second cord rubber slab 5 of radial arrangement, the pre-buried steel loop 2 and extension portal steel loop 3 it
Between be provided with portal steel loop 11, the portal steel loop 11 is provided with least one wire brush 10, and the wire brush 10 is along portal steel loop
Even circumferential is distributed, sealing welding between each wire brush 10, and the back side of wire brush 10 is fixed with elastic waterstop layer 6, the steel
Portal steel loop between wire brush 10 and first of cord rubber slab 4 is provided with greasing hole 12.
The wire brush 10 is twice, during the spacing between the twice wire brush 10 is 70-100cm, the present embodiment
Distance is the wire brush 10 and portal steel on 83cm, the inwall for the portal steel loop 11 that the wire brush 10 is obliquely connected to
The angle that ring 11 enters hole direction is 40 degree to 70 degree, and the angle in the present embodiment is 50 degree.
The portal steel loop 11 of the front side of elastic waterstop layer 6 is provided with elastic waterstop layer keeper 8, for elastic waterstop
In the space that wire brush 10, pre-buried steel loop 2 and sealing layer keeper 8 are formed after compression of the control of layer 6 where it, bullet is prevented
Property sealing layer 6 move forward and come off after shield tunneling process compression.
Ratio before the compression of elastic waterstop layer 6 and after compression is 1.6-2.0, so as to prevent from damaging its wire brush fixed
10.Ratio before the compression of the layer of elastic waterstop described in the present embodiment 6 and after compression is 1.8.
The shape and size of 6 longitudinal cross-section of elastic waterstop layer are obtained according to the spacing for originating portal and shield machine shield shell
Go out, in the present embodiment, the spacing for originating portal with shield machine shield shell is roughly the same, the shape of 6 longitudinal cross-section of elastic waterstop layer
Shape is identical with size, and elastic waterstop layer 6 longitudinal cross-section are shaped as triangle.
Embodiment 5
In the case where shield launching portal longitudinal space allows, i.e. the top of shield cutter 13 is held together after portal excavation face, cutterhead to the
There are enough spaces between one of cord rubber slab 4, twice wire brush 10, steel ventral brush 10 can be increased directly on pre-buried steel loop 2
The back side is fixed in elastic waterstop layer 6, the present embodiment in addition to above-mentioned difference, and other be the same as Examples 4 are identical（Figure is not drawn into）.
Claims (10)
1. a kind of major diameter slurry shield tunnel originates portal sealing device, including agent structure, it is embedded in the agent structure
In pre-buried steel loop, extension portal steel loop is fixed with the pre-buried steel loop, the extension portal steel loop is provided with waterproof construction,
The waterproof construction is to be set along extension portal steel loop axially spaced-apart and along first of cord of extension portal steel loop radial arrangement
Rubber slab and second cord rubber slab, it is characterised in that：First of cord rubber back is fixed with elastic waterstop layer,
Extension portal steel loop between first of cord rubber slab and second the cord rubber slab is provided with injected hole.
2. major diameter slurry shield tunnel as claimed in claim 1 originates portal sealing device, it is characterised in that：Described first
One of shield tail only pulpboard is provided with pre-buried steel loop on front side of road cord rubber slab, the shield tail stops pulpboard along pre-buried portal steel loop
Even circumferential is distributed, and each shield tail stops sealing welding between pulpboard, and the shield tail stops the back side on pulpboard and is fixed with elastic waterstop layer.
3. major diameter slurry shield tunnel as claimed in claim 1 originates portal sealing device, it is characterised in that：Described first
It is provided with least one wire brush on pre-buried steel loop on front side of road cord rubber slab, the wire brush is along pre-buried portal steel loop circumference
It is uniformly distributed, sealing welding between each wire brush, the wire brush back side is fixed with elastic waterstop layer.
4. a kind of major diameter slurry shield tunnel originates portal sealing device, including agent structure, it is embedded in the agent structure
In pre-buried steel loop, extension portal steel loop is fixed with the pre-buried steel loop, the extension portal steel loop is provided with waterproof construction,
The waterproof construction is to be set along extension portal steel loop axially spaced-apart and along first of cord of extension portal steel loop radial arrangement
Rubber slab and second cord rubber slab, it is characterised in that：Portal steel is provided between the pre-buried steel loop and extension portal steel loop
Ring, the portal steel loop is distributed provided with least one wire brush, the wire brush along portal steel loop even circumferential, each wire brush
Between sealing welding, the wire brush back side be fixed with elastic waterstop layer, between the wire brush and first of cord rubber slab
Portal steel loop be provided with greasing hole.
5. major diameter slurry shield tunnel as claimed in claim 4 originates portal sealing device, it is characterised in that：The steel wire
Brush as twice, the spacing between the twice wire brush is 70-100cm, the portal steel loop that the wire brush is obliquely connected to
Inwall on, the angle that the wire brush and portal steel loop enter hole direction is 40 degree to 70 degree.
6. major diameter slurry shield tunnel as claimed in claim 2 originates portal sealing device, it is characterised in that：The shield tail
Only on the inwall for the pre-buried portal steel loop that pulpboard is obliquely connected to, the shield tail stops pulpboard and enters hole direction with pre-buried portal steel loop
Angle be 40 degree to 70 degree.
7. major diameter slurry shield tunnel as claimed in claim 3 originates portal sealing device, it is characterised in that：Described first
Twice wire brush, the inwall for the pre-buried portal steel loop that the wire brush is obliquely connected to are provided with front side of road cord rubber slab
On, the angle that the wire brush enters hole direction with pre-buried portal steel loop is 40 degree to 70 degree.
8. the major diameter slurry shield tunnel as described in claim 1,2,3 or 4 originates portal sealing device, it is characterised in that：
The elastic waterstop layer is more than or equal to 35kg/m3 high-density sponge for density.
9. the major diameter slurry shield tunnel as described in claim 1,2,3 or 4 originates portal sealing device, it is characterised in that：
Elastic waterstop layer longitudinal cross-section is shaped as triangle or trapezoidal, and the steel loop on front side of the elastic waterstop layer is provided with elasticity
Sealing layer keeper.
10. major diameter slurry shield tunnel as claimed in claim 8 originates portal sealing device, it is characterised in that：The bullet
Property sealing layer compression before with the ratio after compression be 1.6-2.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710607041.0A CN107165645B (en) | 2017-07-24 | 2017-07-24 | Major diameter slurry shield tunnel starts entrance to a cave sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710607041.0A CN107165645B (en) | 2017-07-24 | 2017-07-24 | Major diameter slurry shield tunnel starts entrance to a cave sealing device |
Publications (2)
| Publication Number | Publication Date |
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| CN107165645A true CN107165645A (en) | 2017-09-15 |
| CN107165645B CN107165645B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710607041.0A Active CN107165645B (en) | 2017-07-24 | 2017-07-24 | Major diameter slurry shield tunnel starts entrance to a cave sealing device |
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| CN109736832A (en) * | 2019-01-07 | 2019-05-10 | 中铁十一局集团城市轨道工程有限公司 | Originating terminal portal sealing device and method when shield launching wears existing shield tunnel under being |
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| CN110219658A (en) * | 2019-07-25 | 2019-09-10 | 中建八局轨道交通建设有限公司 | Prevent shield machine from planting the device and its application method of head |
| CN111878110A (en) * | 2020-07-31 | 2020-11-03 | 中交隧道工程局有限公司 | Tunnel portal plugging device and method for shield tunnel starting |
| CN113803080A (en) * | 2021-08-10 | 2021-12-17 | 广州轨道交通建设监理有限公司 | Shield tunneling machine initiating method |
| WO2022067993A1 (en) * | 2020-09-29 | 2022-04-07 | 中铁二局集团有限公司 | Shield tail outer side grout stop device and construction method therefor |
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