CN106837359B - A kind of arrival portal sealing device and seal construction method - Google Patents
A kind of arrival portal sealing device and seal construction method Download PDFInfo
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- CN106837359B CN106837359B CN201710070140.XA CN201710070140A CN106837359B CN 106837359 B CN106837359 B CN 106837359B CN 201710070140 A CN201710070140 A CN 201710070140A CN 106837359 B CN106837359 B CN 106837359B
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- 238000007789 sealing Methods 0.000 title claims abstract description 52
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 105
- 239000010959 steel Substances 0.000 claims abstract description 105
- 238000003825 pressing Methods 0.000 claims abstract description 61
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 10
- 238000012856 packing Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 238000007569 slipcasting Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000007363 ring formation reaction Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 241000628997 Flos Species 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- 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
- E21D9/0635—Tail sealing means, e.g. used as end shuttering
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A kind of arrival portal sealing device of present invention offer and seal construction method.The sealing device Specific construction：Before shield machine arrives at portal, installation carries looped flexible containment member and external portal ring on the outer ring plate of pre-buried portal ring outside portal, ring-shaped flexible seal member is made of ring-shaped rubber cord and polylith cord pressing plate, and external portal ring is made of polylith arc-shaped steel component；Shield machine moves on, before shield machine releases portal, cyclic annular rigid seal component is installed on pre-buried portal ring, rigid seal component is made of the sponge between two steel plates of two doughnut-shaped steel plates and filling, when the shield tail tail end face of shield machine is apart from 30 50cm outside external portal ring, annular sealing steel plate is welded between shield machine shield tail and external portal ring and is sealed.Present invention construction is easy to operate, safe and reliable, and can completely seal slurries, and sealing effect is good, and entire work progress is easy safely.
Description
Technical field
The present invention relates to a kind of shield method tunnel construction field, specifically a kind of arrival portal sealing device and sealing
Construction method.
Background technology
In current city underground transport development, shield method is quick because constructing, and the influence to ground is small and obtains extensively
Application.Shield is comparatively safe in normal driving, and what risk point was concentrated mainly on shield originates and reaches reception rank
Section, after arrival is exactly the construction that shield completes a certain running tunnel in the earth formation, while keeping surrounding soil to stablize,
It is advanced to the through-plane of received well always along the route of design, shield is then introduced into received well from preprepared hole
A series of operations.But under high rich water complex geological condition, if the strengthening quality bad portal water burst that easily occurs in end gushes sand,
Normal arrival to directly affect shield receives.If currently, at home because geological conditions or surface condition limitation can not carry out
When cement base end reinforces, often using the method for horizontal freezing reinforcing.But the length limitation because of reinforcing body and underground water mistake
In enriching, the arrival reception of shield still has greater risk.In order to solve the burst problem of arrival portal, applied in shield
It is an indispensable link for portal encapsulation process in work, can vital work be smoothly received for shield
With.
It is to use the sealing device of folding turnover panel and cord rubber structure form that existing conventional portal sealing, which is method,.And
In actual use, since sealing can not be fitted closely between cord rubber and shield shell completely, therefore hole can not be completely enclosed
Door water burst, and if at portal when slip casting, be also inevitably present spillage phenomenon.When water burst is larger or the time is longer, then
It is easy to cause serious accident.
Invention content
The present invention is insufficient according to prior art to provide a kind of arrival portal sealing device and seal construction method, should
Sealing device sealing effect is good, at low cost, and construction method is simple, easy.
Technical solution provided by the invention：A kind of arrival portal sealing device, including it is mounted on arrival
The tubular ring body of pre-buried portal ring at portal, the pre-buried portal ring is embedded in the inner ring surface that shield reaches hole, outer shroud
Plate is embedded in the outer end face at hole, and Formation cross-section is the steel loop support construction of lateral L-type, it is characterised in that：The sealing device
It is close including annular rigid containment member, looped flexible containment member, external portal ring and ring packing steel plate, the annular rigid
Envelope component be by the twice doughnut-shaped steel plate that is welded on the tubular ring body inner ring surface of pre-buried portal ring and embedded two doughnut-shaped steel plates it
Between filling sponge composition, the ring-shaped flexible seal member is made of ring-shaped rubber cord and polylith cord pressing plate, annular
Rubber cord is fixed on the outer ring plate of pre-buried portal ring, and the wherein side of external portal ring is equipped with annular Internal baffle, and passes through
Annular Internal baffle pushes down the rubber cord being fixed on outside outer ring plate, and polylith cord pressing plate is installed in annular Internal baffle outer surface,
Polylith cord pressing plate is distributed in a ring outside annular Internal baffle, and is consolidated cord pressing plate and ring-shaped rubber cord by connecting elements
It is scheduled on the outer ring plate of pre-buried portal ring, the other side of polylith cord pressing plate is circularized by steel wire rope series connection；The external hole
The diameter of knocker is more than the tubular ring body of pre-buried portal ring, when the shield tail of shield machine reaches portal, in shield machine shield tail and outside
It sets and is welded with ring packing steel plate between portal ring.
The present invention preferably technical solution：The external portal ring is that width is used to be combined for 400-600mm curved plates
It is welded, medial and lateral identical with curved plate radian arc is respectively equipped in the medial and lateral curved edge of every piece of curved plate
Shape baffle is respectively equipped with flanged plate at the both ends of every piece of curved plate, the both sides of the flanged plate respectively with inside and outside curved baffle
Welding；After the polylith curved plate is circularized by the flanged plate connection combination at both ends, inside arc baffle group circularizes
Internal baffle, outer arcuate baffle group circularize outer baffle, and inside, polylith bearing rib is welded between outer ring baffle；
The outer plate surface of external portal ring reserves multiple drain holes for being equipped with drain valve；It is opened up on the annular Internal baffle of external portal ring
There are multiple bolts hole, the outer ring plate connecting pin of the ring-shaped rubber cord and pre-buried portal ring is pressed on the curved baffle of inside,
The cord pressing plate is hingedly formed with movable pressing board by fixation clip, and gear in the annular of external portal ring is pushed down in cord pressing plate
By bolt by the fixation clip of cord pressing plate, the annular Internal baffle of external portal ring, ring-shaped rubber cord, solid successively after plate
It is scheduled on the outer ring plate of pre-buried portal ring, the gap of every piece of bearing rib of external portal ring between two adjacent cord pressing plates
Place, one piece of bearing rib of every 15 ° of settings；The external portal annular seal and external portal ring connecting pin, are fixed on external hole
On the outer arcuate baffle of knocker.
The present invention preferably technical solution：Two doughnut-shaped steel plates of the rigid seal component are all made of polylith curved plate and exist
The cyclic annular steel plate being composed after being welded in the tubular ring body of pre-buried portal ring.
The present invention preferably technical solution：The ring packing steel plate be by polylith curved plate be composed annular it is close
Steel plate is sealed, the annular diameters of the ring packing steel plate are equal with the shield tail diameter of shield machine, directly pass through ring packing steel plate
The mode of welding is mounted between external portal ring and the shield tail of shield machine.
The present invention preferably technical solution：It is fixed equipped with steel wire rope at inner annular edge every piece of cord pressing plate outer surface
Ring, steel wire rope fixed ring is distributed in a ring on polylith cord pressing plate, and steel wire rope is from the steel wire rope fixed ring on every piece of cord pressing plate
It passes through, and polylith cord pressing plate is linked together；Steel wire rope pulling eye there are two being opened up on the anchor ring of external portal ring, steel wire rope
Both ends connect respectively with external chain block by two steel wire rope pulling eyes.
The present invention preferably technical solution：Two doughnut-shaped steel plates of rigid seal component are respectively equipped with diameter close to the position of inner ring
It is stitched to cutting, is equipped with the part of cutting seam under the outer force effect of shield machine, cutting seam opens, and doughnut-shaped steel plate turns up, after turning up
Doughnut-shaped steel plate be bonded with shield machine outer surface.
The construction method of a kind of arrival portal sealing provided by the invention, it is characterised in that be as follows：
(1) before shield machine arrives at portal Frozen Body bottom of a cup, portal is carried out in advance and is abolished, it is desirable that portal is abolished to completely sudden and violent
Expose internal layer reinforcing bar, then on the outer ring plate of the pre-buried portal ring outside portal installation with looped flexible containment member and external
Portal ring, ring-shaped flexible seal member are made of ring-shaped rubber cord and polylith cord pressing plate, and every piece of cord pressing plate is by solid
Fixed board is formed with movable plate hinge connection, and external portal ring is made of polylith curved plate, two arcs of every piece of curved plate
Side is welded with curved baffle, and two circumferential sides are respectively welded flanged plate, first by the annular rubber of ring-shaped flexible seal member
Rubberized cord is fixed on the outer ring plate of pre-buried portal ring, is then fixed on the baffle of curved edge on the inside of external portal ring pre-buried
On ring-shaped rubber cord on the outside of the outer ring plate of portal ring, and rubber cord is pushed down, then cord pressing plate is pressed in external portal
Outside ring inner side baffle, then rubber cord, the inner side baffle of external portal ring and cord pressing plate are fixed together by bolt
On the outer ring plate of pre-buried portal ring, the movable plate of polylith cord pressing plate is linked together by steel wire rope, in external portal ring
Opened up on anchor ring there are two steel wire rope pulling eye, the both ends of steel wire rope are pierced by by two steel wire rope pulling eyes respectively, then with outside
Chain block connection, tensed by chain block；
(2) shield machine moves on, and before shield machine releases portal, cyclic annular rigid seal component is installed on portal ring
Top 1/2-2/3 justifies, specifically first according to the parallel curved plate of the installation Antiinterference twice of annular rigid containment member, so
The filling sponge between two steel plates afterwards；
(3) shield machine moves on, and after the cutterhead of shield machine abolishes portal, after dregs has been cleared up, installs cyclic annular rigid
Property containment member lower part 1/3-1/2 circles, mounting means is identical as the mounting means of upper part；
(4) after annular rigid containment member installs, the shield body of shield machine begins through portal, by annular rigid
When containment member, first of sealing is formed by annular rigid containment member between shield body and pre-buried portal ring；Shield machine continues
Advance, when by external portal, tenses the steel wire rope of the cyclic annular flexible seal member cord pressing plate of connection, the shield body shell of shield machine
It is in close contact with rubber cord, forms second sealing；
(5) when the shield tail tail end face of shield machine is apart from external portal ring external redundant 30-50cm, in shield machine shield tail
Annular sealing steel plate is welded between external portal ring carries out three seals；The ring packing steel plate is by polylith curved plate
It is composed, directly shield tail and the outer side shield of external portal ring is welded as a whole by curved plate；
(6) it after three seals completion, is combined with dual slurry using synchronous grouting, section of jurisdiction outer gap is fully noted
Starch it is closely knit, after slurries condensation after, shield machine is released external portal by third of dismantling road sealing element.
Preferably technical solution provided by the invention：It is reserved in the outer plate surface for the external portal ring that step (1) is installed multiple
Drain valve when having flowing water, is drained in third road during sealing welding by drain valve, after the completion of welding, closes stream
Water valve.
Preferably technical solution provided by the invention：Mounted annular rigid sealing in the step (2) and step (3)
Its inner ring of component is less than shield machine shield body outer diameter, is equipped with close to interior in the twice doughnut-shaped steel plate of composition annular rigid containment member
Radial cut slot, when the shield body of shield machine from annular rigid containment member go out across when, it is annular under the outer force effect of shield machine
The part that steel plate has cutting to stitch is turned up, and by forming first of sealing after the sponge compression between two steel plates.
Present invention employs three seals, it is ensured that the sealing effect between shield body and portal, and entire sealing structure
Construction method is simple, cost is relatively low, and can completely seal slurries, and sealing effect is good, and entire work progress is easy safely.
Description of the drawings
Fig. 1 is the overall structure diagram of sealing device in the present invention；
Fig. 2 is the partial enlarged view of A in Fig. 1；
Fig. 3 is BB sectional views in Fig. 2；
Fig. 4 is the structural schematic diagram of external portal ring curved plate；
Fig. 5 is the connection diagram of external portal ring curved plate；
Fig. 6 be in the present invention shield machine into the schematic diagram before portal；
Fig. 7 is schematic diagram when cutter head of shield machine is into portal in the present invention；
Fig. 8 is the schematic diagram that shield machine shield tail crosses portal in the present invention；
Fig. 9 is the vertical view of Fig. 3.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and examples.A kind of arrival hole as shown in Figure 1 to Figure 3
Door seal device, includes the pre-buried portal ring at arrival portal, and the tubular ring body 8 of the pre-buried portal ring is pre-buried
Reach the inner ring surface at hole in shield, outer ring plate 4 is embedded in the outer end face at hole, and Formation cross-section is the steel loop branch of lateral L-type
Support structure, it is characterised in that：The sealing device includes annular rigid containment member 1, looped flexible containment member 2, external hole
Knocker 3 and ring packing steel plate 6.The annular rigid containment member is 8 inner ring of tubular ring body by being welded on pre-buried portal ring
The filling sponge 1-2 compositions between twice doughnut-shaped steel plate 1-1 and embedded two doughnut-shaped steel plate 1-1 on face, the rigid seal structure
Two doughnut-shaped steel plate 1-1 of part 1, which are all made of, to be composed after polylith curved plate welds in the tubular ring body 8 of pre-buried portal ring
Cyclic annular steel plate.It is respectively equipped with radial cut slot 1-3 close to the position of inner ring in two doughnut-shaped steel plate 1-1 of rigid seal component 1, if
There is the part of cutting seam 1-3 under the outer force effect of shield machine 5, cutting seam opens, and doughnut-shaped steel plate turns up, the annular steel after turning up
Plate 1-1 and 5 outer surface palette of shield machine.
As shown in Figures 2 and 3, the ring-shaped flexible seal member 2 is by ring-shaped rubber cord 2-1 and polylith cord pressing plate
2-2 is formed, and ring-shaped rubber cord 2-1 is fixed on the outer ring plate 4 of pre-buried portal ring, and the wherein side of external portal ring 3 is equipped with
Annular Internal baffle 3-1 is simultaneously pushed down the rubber cord being fixed on outside outer ring plate 4 by annular Internal baffle 3-1, and is kept off in annular
Polylith cord pressing plate 2-2 is installed in the outer surfaces plate 3-1, and polylith cord pressing plate 2-2 is distributed in a ring outside annular Internal baffle 3-1, and
Ring-shaped rubber cord 2-1 is fixed on the outer ring plate 4 of pre-buried portal ring by bolt after compression, polylith cord pressing plate 2-2's
The other side is circularized by steel wire rope 2-3 series connection, and steel wire rope is equipped at inner annular edge every piece of outer surface cord pressing plate 2-2
Fixed ring 7, steel wire rope fixed ring 7 is distributed in a ring on polylith cord pressing plate 2-2, and steel wire rope 2-3 is from every piece of cord pressing plate 2-2
Steel wire rope fixed ring 7 pass through, and polylith cord pressing plate 2-2 is linked together；Two are offered on the anchor ring of external portal ring 3
The both ends of a steel wire rope pulling eye, steel wire rope 2-3 are connect by two steel wire rope pulling eyes with external chain block respectively.It is described outer
The diameter for setting portal ring 3 is more than the tubular ring body 8 of pre-buried portal ring, when the shield tail of shield machine 5 reaches portal, in shield machine 5
It is welded with ring packing steel plate between shield tail and external portal ring 3.The ring packing steel plate 6 is combined by polylith curved plate
Made of ring packing steel plate, the annular diameters of the ring packing steel plate are equal with the shield tail diameter of shield machine 5, directly will be annular
Sealing steel plate is mounted between external portal ring 3 and the shield tail of shield machine 5 by welding.
As shown in Figure 4 and Figure 5, the external portal ring 3 be use width for 400-600mm curved plates Combination Welding and
At being respectively equipped with medial and lateral identical with curved plate radian arcs gear in the medial and lateral curved edge of every piece of curved plate
Plate, the both sides that flanged plate 3-4, the flanged plate 3-4 are respectively equipped at the both ends of every piece of curved plate are kept off with inside and outside arc respectively
Plate welds；After the polylith curved plate is circularized by the flanged plate 3-4 connections at both ends combination, inside arc baffle group at
Annular Internal baffle 3-1, outer arcuate baffle group circularizes outer baffle 3-2, and welds inside, between outer ring baffle 3-1,3-2
There is polylith bearing rib 3-3, plays a supporting role；Multiple bolts hole are offered on the annular Internal baffle 3-1 of external portal ring 3
3-5.As shown in Figures 2 and 3,4 connecting pin of outer ring plate of the ring-shaped rubber cord 2-1 and pre-buried portal ring are pressed on inside arc
On shape baffle 3-1, the cord pressing plate 2-2 is hingedly formed with movable pressing board by fixation clip, is pushed down in cord pressing plate 2-2 outer
Set after the annular Internal baffle 3-1 of portal ring by bolt by the fixation clip of cord pressing plate 2-2, external portal ring annular in
Baffle 3-1, it ring-shaped rubber cord 2-1, is sequentially fixed on the outer ring plate 4 of pre-buried portal ring, every piece of support of external portal ring 3
Gap locations of the gusset 3-3 between two adjacent cord pressing plate 2-2, there are five gaps between general two adjacent bearing rib；
The ring packing steel plate 6 and external 3 connecting pin of portal ring, are fixed on the outer arcuate baffle 3-2 of external portal ring 3.Such as
Shown in Fig. 9, reserve multiple drain holes for being equipped with drain valve 9 in the outer plate surface of external portal ring 3 has stream in seal process
It when water, is drained by drain valve, after the completion of welding, closes water valve.
There is infiltration phenomenon in embodiment, the shield of certain construction work, due to can not be completely close between cord rubber and shield shell
Envelope, is inevitably present spillage phenomenon at portal when slip casting；In order to reduce cost, and avoid leaking when slip casting at portal
The phenomenon that slurry, the construction method for receiving portal sealing is reached using the improved shield of the present invention, which notes with shield
The common construction of slurry, can effectively control shield duct piece rear water, ensure the safety that shield freezing receives.
Shield machine synchronous grouting in this implementation uses mixes inert slurry, slurry consistency 150, setting time 13h certainly.
From mixing inert slurry and traditional cement mortar slurries difference such as table 1, the consistency of a variety of materials is big, and (number of consistency is small to be shown
It is that consistency is big)：
1 synchronous grouting raw material contrast table of table
The Specific construction process of the present embodiment is as follows：
(1) before shield machine arrives at portal Frozen Body bottom of a cup, portal is carried out in advance and is abolished, it is desirable that portal is abolished to completely sudden and violent
Expose internal layer reinforcing bar, then as shown in fig. 6, on the outer ring plate of pre-buried portal ring outside portal installation sealed with looped flexible
Component and external portal ring；Specific installation process：Screw rod is installed on the outer ring plate of pre-buried portal ring, ring-shaped rubber cord is led to
The bolt hole of oneself is crossed to hang on the screw rod installed on pre-buried portal ring, then by the polylith curved plate of external portal ring along
Ring-shaped rubber cord, and the prepared screw-bolt hole in the inner side baffle of external portal ring are pushed down in the outer ring plate fixation of pre-buried portal ring,
One piece of external portal ring is often pushed down, screw rod is installed in the bolt hole in the inner side baffle of pre-buried portal ring, in external portal ring
Polylith cord pressing plate is installed, every piece of cord pressing plate is formed by fixed plate and movable plate hinge, in cord pressing plate outside inner side baffle
Fixed plate on also offer bolt hole, and by the fixed plate of cord pressing plate and external portal ring, fixation is pushed down together by screw rod
Annular cord, every piece of arc panel of the external portal ring of installation annular, the curved plate after installing form one completely successively
Portal ring, polylith cord pressing plate also form an annular, and external portal ring is compressed together with cord, finally by polylith cord pressure
The movable plate of plate is linked together by steel wire rope；Two slot holes are set on the anchor ring of external portal ring, hold cord pressing plate
Then steel wire rope can tense cord pressing plate by chain block by being wherein pierced by outside external portal ring；
(2) since shield machine before arriving at Frozen Body aircraft gate when 5 ring, to arriving at aircraft gate, using synchronous grouting with pair
Slurry combines, and grouting be- hind segment system is collectively formed, dual slurry injection is using the 5th endless tube piece upper semi-circle of inverse after shield tail
Two fluid grouting is carried out, the setting time for adjusting dual slurry is 60 seconds；After shield arrives at Frozen Body aircraft gate, continue to carry out same
Step slip casting is to reaching grouting pressure controlling value；Meanwhile the upper semi-circle position of the 4th endless tube piece of inverse after shield tail carries out biliquid note
Slurry, the setting time for adjusting dual slurry are 30 seconds；Meanwhile to Frozen Body pull out the operation of cryovial.Stop in shield arrival
Behind seat in the plane to before promoting again, using freezing extubation time, dual slurry closing cyclization, synchronous grouting is noted to full；
(3) after cryovial is all extracted, shield machine restores driving, the upper semi-circle of the 4th endless tube piece of inverse after shield tail
Position carries out two fluid grouting, and the setting time of dual slurry is 30 seconds, makes dual slurry and the quick shape of Frozen Body frost wall as far as possible
Strike a bargain circle；The soil pressure that 0.3~0.5bar is remained in native storehouse, it is closely knit to be conducive to grouting at the tail of the shield machine；Until cutterhead arrives at portal steel
Reinforced concrete protective layer continues synchronous grouting and two fluid grouting after arriving at protective layer, and two fluid grouting needs cyclization, synchronous
Slip casting is as full as possible, and during this period, as shown in fig. 6, installing on pre-buried portal ring being composed for steel plate and sponge
Annular rigid sealing element, the top 2/3rds for first installing cyclic annular rigid seal at this time are justified, and rigid seal uses 2 thickness
For the curved plate of 0.5cm, directly steel plate is welded on pre-buried portal ring, the sea of 150mm × 150mm is filled between two steel plates
Continuous item；
(4) cutterhead dallies, and screw machine goes out the soil body in empty native storehouse, then continues to promote and abolishes portal, portal is abolished in cutterhead
Afterwards, dregs has been cleared up, then as shown in fig. 7, installing the steel plate and sponge combination of the rigid seal of lower section 1/3, lower part
Rigid seal is installed as upper part installation process, and mounted rigid seal forms a complete annular, is true
Protecting shield machine can pass through, and ensure its sealing effect, rigid seal doughnut-shaped steel plate close to the position of inner ring 10cm
Set and offer radial cut slot, shield machine by when, cutting seam opens, and doughnut-shaped steel plate turns up, the doughnut-shaped steel plate after turning up
It is bonded with shield machine outer surface, sponge will be close to shield machine outer wall at this time, form first of sealing；
(5) and then shield machine moves on, and when the shield body of shield machine is by external portal ring, is tensed by chain block
Steel wire rope makes cord pressing plate inwardly be pressed on ring-shaped rubber cord, shield machine shield body by give one, ring-shaped rubber cord to
Outer thrust, ring-shaped rubber cord is tightly attached to the shield body outer wall of shield machine under the action of two power, forms second sealing；
(6) enter portal in the shield of shield machine, and when shield tail tail end is apart from external portal external redundant 30-50cm (according to
Determined according to the stroke of last endless tube piece), as shown in figure 8, using polylith curved plate by side block outside shield tail and external portal ring
Plate is welded as entirety, and also sealing welding between polylith curved baffle forms complete annular sealing baffle, forms three seals；
(7) it after the completion of ring packing baffle welds, is combined, will fully be noted outside section of jurisdiction with dual slurry using synchronous grouting
Starch it is closely knit, after slurries condensation after, cut off curved plate, shield machine released into external portal.
As shown in figure 9, the present invention is in the construction process, multiple drain valves are reserved in the outer plate surface of external portal ring, are being welded
It connects in third road seal process, when having flowing water, is drained by drain valve, after the completion of welding, close water valve.
Claims (9)
1. a kind of arrival portal sealing device includes the pre-buried portal ring at arrival portal, described pre-buried
The tubular ring body (8) of portal ring is embedded in the inner ring surface that shield reaches hole, and outer ring plate (4) is embedded in the outer end face at hole,
Formation cross-section is the steel loop support construction of lateral L-type, it is characterised in that：The sealing device includes annular rigid containment member
(1), looped flexible containment member (2), external portal ring (3) and ring packing steel plate (6), the annular rigid containment member are
By the twice doughnut-shaped steel plate (1-1) being welded on tubular ring body (8) inner ring surface of pre-buried portal ring and embedded two doughnut-shaped steel plate (1-
1) filling sponge (1-2) composition between, the ring-shaped flexible seal member (2) is by ring-shaped rubber cord (2-1) and polylith
Cord pressing plate (2-2) forms, and ring-shaped rubber cord (2-1) is fixed on the outer ring plate (4) of pre-buried portal ring, external portal ring
(3) wherein side is equipped with annular Internal baffle (3-1), and will be fixed on the rubber of outer ring plate (4) outside by annular Internal baffle (3-1)
Rubberized cord is pushed down, and in the outer surface annular Internal baffle (3-1) installation polylith cord pressing plate (2-2), polylith cord pressing plate (2-2) is in ring
Shape is distributed in annular Internal baffle (3-1) outside, and by connecting elements that cord pressing plate (2-2) and ring-shaped rubber cord (2-1) is solid
It is scheduled on the outer ring plate (4) of pre-buried portal ring, the other side of polylith cord pressing plate (2-2) passes through steel wire rope (2-3) series connection cyclization
Shape；The diameter of the external portal ring (3) is more than the tubular ring body (8) of pre-buried portal ring, and hole is reached in the shield tail of shield machine (5)
Men Shi is welded with ring packing steel plate between shield machine (5) shield tail and external portal ring (3).
2. a kind of arrival portal sealing device according to claim 1, it is characterised in that：The external portal ring
(3) it is that width is used to be formed for 400-600mm curved plate Combination Weldings, in the medial and lateral curved edge of every piece of curved plate
It is respectively equipped with medial and lateral identical with curved plate radian curved baffle, flange is respectively equipped at the both ends of every piece of curved plate
It is welded respectively with inside and outside curved baffle the both sides of plate (3-4), the flanged plate (3-4)；The polylith curved plate passes through both ends
Flanged plate (3-4) connection combination circularize after, inside arc baffle group circularize Internal baffle (3-1), outer arcuate baffle
Group circularizes outer baffle (3-2), and inside, polylith bearing rib (3-3) is welded between outer ring baffle (3-1,3-2)；
The outer plate surface of external portal ring (3) reserves multiple drain holes for being equipped with drain valve (9)；In the annular of external portal ring (3)
Multiple bolts hole (3-5), the outer ring plate (4) of the ring-shaped rubber cord (2-1) and pre-buried portal ring are offered on baffle (3-1)
Connecting pin is pressed on inside curved baffle (3-1), the cord pressing plate (2-2) be it is hinged by fixation clip and movable pressing board and
At by bolt by cord pressing plate (2-2) after cord pressing plate (2-2) pushes down the annular Internal baffle (3-1) of external portal ring
Fixation clip, external portal ring annular Internal baffle (3-1), ring-shaped rubber cord (2-1), be sequentially fixed at pre-buried portal ring
Outer ring plate (4) on, between every piece of bearing rib (3-3) of external portal ring (3) is between two adjacent cord pressing plates (2-2)
At gap；The ring packing steel plate (6) and external portal ring (3) connecting pin are fixed on the outer arcuate gear of external portal ring (3)
On plate (3-2).
3. a kind of arrival portal sealing device according to claim 1 or 2, it is characterised in that：The rigid seal
Two doughnut-shaped steel plates (1-1) of component (1) are all made of group after polylith curved plate welds in the tubular ring body (8) of pre-buried portal ring
Cyclic annular steel plate made of conjunction.
4. a kind of arrival portal sealing device according to claim 1 or 2, it is characterised in that：The ring packing
Steel plate (6) is the ring packing steel plate being composed of polylith curved plate, the annular diameters and shield of the ring packing steel plate
The shield tail diameter of machine (5) is equal, and ring packing steel plate is directly mounted on external portal ring (3) and shield by welding
Between the shield tail of machine (5).
5. a kind of arrival portal sealing device according to claim 1 or 2, it is characterised in that：In every piece of cord pressure
The outer surface plate (2-2) is equipped with steel wire rope fixed ring (7) at inner annular edge, and steel wire rope is fixed on polylith cord pressing plate (2-2)
Ring (7) is distributed in a ring, and steel wire rope (2-3) is passed through from the steel wire rope fixed ring (7) on every piece of cord pressing plate (2-2), and will be more
Block cord pressing plate (2-2) is linked together；Steel wire rope pulling eye there are two being opened up on the anchor ring of external portal ring (3), steel wire rope (2-
3) both ends are connect by two steel wire rope pulling eyes with external chain block respectively.
6. a kind of arrival portal sealing device according to claim 1 or 2, it is characterised in that：Rigid seal component
(1) two doughnut-shaped steel plates (1-1) are respectively equipped with radial cut slot (1-3) close to the position of inner ring, are equipped with the portion of cutting seam (1-3)
Divide under the outer force effect of shield machine (5), cutting seam opens, and doughnut-shaped steel plate turns up, the doughnut-shaped steel plate (1) after turning up and shield machine
(5) outer surface is bonded.
7. a kind of construction method of arrival portal sealing, it is characterised in that be as follows：
(1) before shield machine arrives at portal Frozen Body bottom of a cup, portal is carried out in advance and is abolished, it is desirable that portal is abolished to completely revealing
Internal layer reinforcing bar, then installation carries looped flexible containment member and external portal on the outer ring plate of the pre-buried portal ring outside portal
Ring, ring-shaped flexible seal member are made of ring-shaped rubber cord and polylith cord pressing plate, and every piece of cord pressing plate is by fixed plate
It is formed with movable plate hinge connection, external portal ring is made of polylith curved plate, two arc-shaped side edges of every piece of curved plate
It is welded with curved baffle, two circumferential sides are respectively welded flanged plate, first by the ring-shaped rubber curtain of ring-shaped flexible seal member
Cloth is fixed on the outer ring plate of pre-buried portal ring, and the baffle of curved edge on the inside of external portal ring is then fixed on pre-buried portal
On ring-shaped rubber cord on the outside of the outer ring plate of ring, and rubber cord is pushed down, then cord pressing plate is pressed in external portal ring
Outside side shield, then rubber cord, the inner side baffle of external portal ring and cord pressing plate are fixed on together by bolt pre-
On the outer ring plate for burying portal ring, the movable plate of polylith cord pressing plate is linked together by steel wire rope, in the anchor ring of external portal ring
On open up there are two steel wire rope pulling eye, the both ends of steel wire rope are pierced by by two steel wire rope pulling eyes respectively, then with external hand
Cucurbit connection is drawn, is tensed by chain block；
(2) shield machine moves on, and before shield machine releases portal, the top of cyclic annular rigid seal component is installed on portal ring
Then circle specifically first exists according to the parallel curved plate of the installation Antiinterference twice of annular rigid containment member
Filling sponge between two steel plates；
(3) shield machine moves on, and after the cutterhead of shield machine abolishes portal, after dregs has been cleared up, installation annular rigid is close
Member lower 1/3-1/2 circles are sealed, mounting means is identical as the mounting means of upper part；
(4) after annular rigid containment member installs, the shield body of shield machine begins through portal, is sealed by annular rigid
When component, first of sealing is formed by annular rigid containment member between shield body and pre-buried portal ring；Shield machine moves on,
When by external portal, the steel wire rope of the cyclic annular flexible seal member cord pressing plate of connection, the shield body shell of shield machine and rubber are tensed
Rubberized cord is in close contact, and forms second sealing；
(5) when the shield tail tail end face of shield machine is apart from external portal ring external redundant 30-50cm, in shield machine shield tail and outside
The annular sealing steel plate of welding carries out three seals between setting portal ring；The ring packing steel plate is combined by polylith curved plate
It forms, directly shield tail and the outer side shield of external portal ring is welded as a whole by curved plate；
(6) it after three seals completion, is combined with dual slurry using synchronous grouting, the abundant slip casting of section of jurisdiction outer gap is close
Real, after slurries condensation, shield machine is released external portal by third of dismantling road sealing element.
8. a kind of construction method of arrival portal sealing according to claim 7, it is characterised in that：In step (1)
The outer plate surface of the external portal ring of installation reserves multiple drain valves, in the welding process of three seals, when having flowing water, passes through
Drain valve is drained, and after the completion of welding, closes water valve.
9. a kind of construction method of arrival portal sealing according to claim 7, it is characterised in that：The step
(2) and in step (3) mounted its inner ring of annular rigid containment member is less than shield machine shield body outer diameter, in composition annular rigid
The twice doughnut-shaped steel plate of containment member is equipped with radial cuts seam close to interior, when the shield body of shield machine is from annular rigid containment member
Go out across when, the part that doughnut-shaped steel plate has cutting to stitch under the outer force effect of shield machine is turned up, and passes through the sea between two steel plates
First of sealing is formed after silk floss compression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710070140.XA CN106837359B (en) | 2017-02-09 | 2017-02-09 | A kind of arrival portal sealing device and seal construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710070140.XA CN106837359B (en) | 2017-02-09 | 2017-02-09 | A kind of arrival portal sealing device and seal construction method |
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| CN106837359A CN106837359A (en) | 2017-06-13 |
| CN106837359B true CN106837359B (en) | 2018-10-02 |
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| CN201710070140.XA Active CN106837359B (en) | 2017-02-09 | 2017-02-09 | A kind of arrival portal sealing device and seal construction method |
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| CN107165643B (en) * | 2017-06-16 | 2019-04-23 | 中建市政工程有限公司 | A kind of slurry shield originates portal sealing device |
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| CN109826643B (en) * | 2019-03-26 | 2024-02-09 | 江苏建筑职业技术学院 | Pre-buried structure of drainage tunnel shield tunnel portal |
| CN110259462B (en) * | 2019-06-12 | 2020-11-10 | 中铁四局集团有限公司 | Repairing method for deformation of hinged part of underground shield tunneling machine |
| CN110206554A (en) * | 2019-07-09 | 2019-09-06 | 中交路桥建设有限公司 | A kind of shield reception sealing structure |
| CN110359920B (en) * | 2019-07-31 | 2020-12-22 | 中铁隧道局集团有限公司 | Emergency sealing device for shield tail |
| CN110374640B (en) * | 2019-08-19 | 2021-07-30 | 上海市基础工程集团有限公司 | Sand-stopping and water-stopping device for head of pipe-jacking tunnel |
| CN111411972B (en) * | 2020-03-23 | 2022-03-11 | 中建市政工程有限公司 | Elastic sealing device for tightness of shield receiving tunnel portal and construction method |
| CN111911171B (en) * | 2020-07-21 | 2022-02-08 | 中铁十一局集团有限公司 | Tunnel portal sealing device and method for shield launching |
| CN111828025B (en) * | 2020-07-21 | 2021-11-05 | 中铁十一局集团有限公司 | Shield receiving construction method and receiving tunnel portal water stopping device |
| CN111980713A (en) * | 2020-07-30 | 2020-11-24 | 中铁十四局集团隧道工程有限公司 | Shield starting sealing device and method |
| CN112031181A (en) * | 2020-08-27 | 2020-12-04 | 中国十七冶集团有限公司 | Prefabricated wallboard and floor slab joint bin sealing tool and construction method |
| CN113622930B (en) * | 2021-09-10 | 2024-02-20 | 上海市机械施工集团有限公司 | Slurry balance shield tunnel entering and exiting construction method |
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Inventor after: Long Huadong Inventor after: Zheng Jun Inventor after: Li Yingjiao Inventor after: Ruan Yingshu Inventor after: Wu Juncheng Inventor after: Wan Weiyan Inventor after: Tang Dakun Inventor before: Liao Jianping Inventor before: Wu Juncheng Inventor before: Yang Weipeng Inventor before: Wan Weiyan Inventor before: Zeng Shuhui Inventor before: Wang Tian Inventor before: Chen Shanyun |