CN107676097A - A kind of high hydraulic pressure soft soil layer HFE composite shield originating methods - Google Patents
A kind of high hydraulic pressure soft soil layer HFE composite shield originating methods Download PDFInfo
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- CN107676097A CN107676097A CN201710746792.0A CN201710746792A CN107676097A CN 107676097 A CN107676097 A CN 107676097A CN 201710746792 A CN201710746792 A CN 201710746792A CN 107676097 A CN107676097 A CN 107676097A
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- steel loop
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- loop device
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- 239000002689 soil Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 137
- 239000010959 steel Substances 0.000 claims abstract description 137
- 238000007710 freezing Methods 0.000 claims abstract description 67
- 230000008014 freezing Effects 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000010276 construction Methods 0.000 claims abstract description 23
- 238000013461 design Methods 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 15
- 238000007596 consolidation process Methods 0.000 claims abstract description 9
- 230000009545 invasion Effects 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- 235000015110 jellies Nutrition 0.000 claims abstract description 3
- 239000008274 jelly Substances 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 37
- 230000007306 turnover Effects 0.000 claims description 23
- 239000004519 grease Substances 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 13
- 239000012267 brine Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 10
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 10
- 239000003921 oil Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 238000007569 slipcasting Methods 0.000 claims description 8
- 230000005641 tunneling Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 7
- 230000009977 dual effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 5
- 239000011083 cement mortar Substances 0.000 claims description 5
- 235000019353 potassium silicate Nutrition 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 238000004904 shortening Methods 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims 1
- 238000010257 thawing Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000005728 strengthening Methods 0.000 abstract description 6
- 238000001556 precipitation Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 238000007792 addition Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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- 210000002435 tendon Anatomy 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000003643 water by type Substances 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
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- 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
-
- 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
- E21D9/0642—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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to shield-tunneling construction field, specially a kind of high hydraulic pressure soft soil layer HFE composite shield originating methods, solve soft soil layer shield launching reception technique problem under high water pressures, comprise the following steps：Construction rotary jet strengthening is required according to design drawing；Construct freezing pipe and thermometer hole, lay thermometric line, freezing equipment and start to freeze after freezing pipeline installation and debugging；Shield launching prepares；External steel loop device is connected with outside portal steel loop；Shield launching preparation is completed and abolishes portal building enclosure after consolidation by freezing；Shield machine jacking forward；Shield machine working face builds pressure；Freezing pipe is pulled out in driving profile, and remaining freezing pipe, which works on, applies jelly；External steel loop device alien invasion welds arc, starts synchronous grouting after shield machine is completely into external steel loop device, and completion originates driving.Present invention is particularly suitable for head is high, water is big, do not possess originate precipitation condition soft soil layer in advantage it is particularly evident, promotion prospect is good.
Description
Technical field
The present invention relates to shield-tunneling construction field, specially a kind of high hydraulic pressure soft soil layer HFE composite shield originating methods.
Background technology
The fast development of China's track traffic in recent years, various regions select this cleaning one after another, comfortable, efficiently large conveying quantity transports
Instrument solves the problems, such as urban congestion, ends for the end of the year 2015, and operation, 44 city rails are opened in totally 26 urban track traffics in the whole nation
Traffic programme is granted, and circuit is in large scale for planning, construction project is various, and shield method is with the characteristics of its is safe efficient, strong adaptability
As a kind of the most commonly used running tunnel construction method.
With the maturation of Shield Construction Technique and the accumulation of construction experience, its security performance gradually steps up, but shield launching
The greateset risk point of shield-tunneling construction is remained with receiving, shield launching receives accident and emerged in an endless stream over the years, and serious even floods
Do not have shield machine and station, section, cause very big economic loss, jeopardize personal security, in rich water soft soil area near a river, level of ground water
Height, underground pore water enrich, and the self-stable ability of the country rock soil body is poor, and weak soil cutterhead does not possess diaphram wall and abolishes ability, need
Portal diaphram wall is manually abolished, originates and to receive risk especially prominent.
The content of the invention
In order to solve soft soil layer shield launching reception technique problem under high water pressures, the invention provides a kind of work
The high hydraulic pressure soft soil layer composite shield originating method that skill is simple, method is novel, advanced technology, security performance are high.
Suitable for the shield launching of water rich strata, especially head is high, water is big, does not possess and originates the soft of precipitation condition
Advantage is particularly evident in soil layer, by optimizing combination to traditional reinforcing mode and portal sealed waterproof device, utilizes height
Pressure rotary-spraying（High pressure jet grouting pile）Stake strengthens stratum self-stability, reduces lateral Water And Earth Pressures；Utilize
Freezing（Freezing method）Isolation underground water, ensure that portal abolishes safety；Utilize the external steel loop device of portal（The
external ring）The hermetic seal in shield launching, reduce shield launching and receive risk, form multiple defence line, advantage is mutual
Mend, reduce the weak link originated in scheme, reduce shield launching risk, referred to as a kind of high hydraulic pressure soft soil layer HFE combined types
Shield launching method.
Originating method of the present invention comprises the following steps：
S1, calculated to carrying out subsidence pressure circle spray reinforcement in the range of 3 meters on the outside of shield machine according to hydrological geological conditions and Water And Earth Pressures；Press
According to design drawing requirement, work out arrangement and method for construction and carry out test pile, construction parameter is determined according to test pile result and constructed, full
Rotary jet strengthening body intensity is reduced on the basis of sufficient design requirement as far as possible, is easy to the later stage to tunnel；
S2, according to overall design requirement to freezing to carry out Deepen Design, according to design arrangement freezing pipe and thermometer hole, cloth in thermometer hole
If thermometric line, freezing equipment and freeze to start to freeze after pipeline installation and debugging；
S3, the end soil body reinforced is checked, it is ensured that foundation bearing capacity starts shield after meeting lifting appliance construction safety
Structure machine assembles, while completes counter-force and support and carry out shield launching preparation after starting assembled negative endless tube piece；Complete shield machine complete machine
Assembly and adjustment and the installation and debugging such as vertical transit system and horizontal transportation system, mud disposal system, pulping system, above-mentioned work
Period refrigeration system actively freezes, and completes counter-force and supports and form shield launching state after starting assembled negative endless tube piece；
S4, when slurry shield originates, need be connected with external steel loop device station main body outside main body portal steel loop AT STATION
External steel loop device is connected with outside portal steel loop；
After S5, the completion of shield launching preparation and consolidation by freezing reach design effect and keep stable, abolish portal and go along with sb. to guard him knot
Structure；After shield launching preparation is completed and consolidation by freezing reaches design effect, piecemeal, layering, from the inside to surface, from top to bottom
Mode abolishes portal building enclosure, and native side reinforcing bar is met in reservation, and portal continues maintenance during abolishing and freezed, and carries out frost table guarantor
Temperature；
S6, for ensure sealing effectiveness and shortening build pressure the time, portal is abolished finish and clear up after the completion of in external steel loop device shape
Into airtight cavity in smear lubrication and seal grease；
S7, external steel loop device lubrication and seal grease continue assembled negative ring after the completion of smearing, by shield body jacking forward, shield machine enters
Before entering portal, lubricating oil is applied on the outside of cutterhead periphery and cord rubber slab, in case cutter head of shield machine hanging breaking cord rubber slab influences
Sealing effectiveness, to ensure freezing pipe safety, 20cm stops jacking before shield body is moved forward into freezes body；
S8, pressure is built to its working face after shield machine is advanced to precalculated position；
S9, after being established when mud hydraulic pressure, ensuring external steel loop device sealing effectiveness, you can start tunnel profile in freezing pipe pull out
Remove, remaining freezing pipe continues to freeze；
S10, shield launching stage driving should slowly steer a steady course, fltting speed control in below 10mm/min, when driving extremely
Shield body fully enters external steel loop device, and shield tail edge is slightly more forward than external steel loop device alien invasion, external steel loop device hole
Pause driving before circle brush intersects with only pulpboard but not yet departed from；
S11, after shield machine shield tail is completely into portal, when the rubber water-proof door curtain made of cloth and pressing plate and section of jurisdiction wall contacts, due to
Gap drop instantaneously expands, and to prevent external steel loop device ventral brush and rubber heavy curtain from turning up and causing seal failure, enters in shield tail outer
Connect after steel loop device in the circle arc of external steel loop device alien invasion welding one, gap between external steel loop device and section of jurisdiction is carried out
Closure, wadding quilt can be filled between arc and ventral brush if necessary, plug, which fills out thing, can not influence ventral brush resilience, it is ensured that shield tail passes through external
Steel loop device moment, sealing effectiveness between external steel loop device and section of jurisdiction；
S12, continue slowly to push ahead shield machine, when shield machine completely into external steel loop device and departs from the ring of shield tail 1~2
After start synchronous grouting；
S13, shield machine shield body fully enter portal steel loop and complete to gradually step up otch hydraulic pressure to theory after portal strengthens slip casting
Calculated value, completion originate driving, stop Freezing Station operating, remaining freezing pipe are pulled out, into normal tunneling construction.
Shield machine working face is built after pressure refers to the injection of external steel loop device closed chamber grease in step S8, carries out shield
The muddy water of machine builds pressure.The injection of external steel loop device closed chamber grease is first carried out, when cutterhead is advanced to precalculated position, with greasing Guan Lian
Connect external steel loop device and reserve greasing hole and grease distributing valve, open greasing gate valve, make grease from the reserved note of external steel loop device
Fat hole is injected in external steel loop device, fills up its space；To prevent portal percolating water, avoiding mud hydraulic pressure from losing, grease injection
Pressure should be greater than otch hydraulic pressure, form overflow；Further, after grease injection reaches predetermined pressure, mud tube is opened, is progressively lifted
Height excavates storehouse liquid level, observes external steel loop device spillage situation, suspends mud injection if spillage, continues to fill oil at spillage
Fat, if portal reaches sealing effectiveness, otch hydraulic pressure is stepped up, can when building pressure to ensure external steel loop device sealing effectiveness
Reduce otch mud hydraulic pressure as far as possible in allowed limits, reduce muddy water to the pressure of external steel loop device, otch mud hydraulic pressure
Forbid the pressure voltage more than portal cord rubber.
Freezing pipe is pulled out comprising herein below in step S9 or step S13：
A, it is that 100~150kw electrothermal tubes heat salt solution that general power is installed in brine tank；
B, using every 2~3 groups of freezing pipes to be a collection of, hot salt brine is circulated in freezing pipe or thermometer hole；
C, when frozen soil melts 3~5cm around freezing pipe, loosening freezing pipe is pulled out with casing puller or very heavy jack-up in time；
D, the freezing pipe loosened is quickly extracted with crane；
E, clay or low-grade cement mortar sealing of hole are used after tube drawing.
Step S12 slip castings use cement, waterglass dual slurry, cement mortar and waterglass volume ratio 1：0.5, cement pulp-water ash
Than 1：1, step S12 slip casting use cement, waterglass dual slurry, and grouting pressure value is：0.1~0.3MPa, slip casting measure ring
1.3~1.8 times of shape critical gap theory volume.And need to control the outlet pressure of dual slurry injection in injection process, avoid pair
Shield tail damages.
External steel loop device is enough into first and the second road sealing device are by twice rubber by three seal structures in step S4
Glue sealing plate, turnover panel, Circular Plate, packing ring and bolt etc. forms.Three seals are using the sealing of welding shield tail brush, shape on the outside of steel loop
Into two airtight cavities, the greasing hole with gate valve is reserved between the external closed chamber of steel loop device two.
External steel loop device includes steel loop, and both ends are respectively arranged with first annular face along shield machine tunneling direction on the inside of steel loop
Plate and the 3rd annular panel, steel loop middle inside position are provided with the second annular panel, first annular panel and the second ring surface
Plate is connected to rubber heavy curtain and turnover panel, and turnover panel is arranged on rubber curtain backstage side and the two is connected for contact, the 3rd ring surface
Plate is connected with wire brush and sealing plate, and steel loop has oil addition hole, first annular panel, the second ring between annular panel
The structure of shape panel and the 3rd annular panel is identical, and its internal diameter is identical with the internal diameter of the pre-buried steel loop of portal, on annular panel
The bolt hole being connected with rubber heavy curtain and turnover panel is provided with, turnover panel includes fixed plate, axis and folding pressing plate, spiral shell is provided with fixed plate
Keyhole, folding pressing plate are hinged in fixed plate by axis, and wire brush includes U-shaped steel board head, is provided with U-shaped steel board head
High-strength steel tow, high-strength steel tow are provided at both ends with zinc-plated reinforcement steel plate.
The present invention utilizes high-pressure rotary jet grouting pile by optimizing combination to traditional reinforcing mode and portal sealed waterproof device
Strengthen stratum self-stability, reduce lateral Water And Earth Pressures；Using freezing isolation underground water, ensure that portal abolishes safety；Utilize hole
Steel loop device hermetic seal in shield launching is connect outdoors, is reduced shield launching and is received risk, forms multiple defence line, advantage is mutual
Mend, reduce the weak link originated in scheme, reduce shield launching risk, technique is simple, method is novel, advanced technology, safety
Performance is high；The present invention is applied to all water rich stratas and originated, but head is high, water is big, does not possess and originates precipitation condition
Advantage is particularly evident in soft soil layer, advanced technology, applied widely, practical, and promotion prospect is good.
Brief description of the drawings
Fig. 1 is floor map of the present invention；
Fig. 2 is longitudinal profile schematic diagram of the present invention；
Fig. 3 is that shield machine of the present invention enters external steel loop schematic device；
Fig. 4 is that shield machine of the present invention enters detail drawing at external steel loop device portal；
Fig. 5 is that soft soil layer slurry shield extra long distance tunnels combined type cutter head structure schematic diagram；
Fig. 6 is structure section schematic diagram of the present invention；
Fig. 7 is external steel loop apparatus structure section drawing；
Fig. 8 is external steel loop apparatus structure elevational schematic view；
Fig. 9 is external steel loop device turnover panel front view；
Figure 10 is external steel loop device turnover panel side view；
Figure 11 is external steel loop device wire brush drawing.
In figure：1- rotary jet strengthenings, 2- consolidations by freezing, the external steel loop devices of 3-, 4- portal building enclosures, 5- cutterheads, 6- shields
Structure machine, 7- freezing pipes, 8- thermometer holes, 9- main body portals, 10- stop pulpboard, 11- arcs, 12- sections of jurisdiction, 13- cord rubber slabs,
14- holes circle brush, the pre-buried steel loop of 3.1- portals, 3.2- shield machine external diameters, the external steel loop device of 3.3- portals, 3.4- rubber heavy curtains,
3.5- turnover panels, 3.6- wire brushes, 3.7- oil additions hole, 3.8- sections of jurisdiction external diameter, 3.9- stiffener plates, the high-strength spiral shell of 3.10a- double ends
Bolt, 3.10b- high-strength bolts, 3.11- fixed plates, 3.12- axis, 3.13- folding pressing plates, the zinc-plated reinforcement steel plates of 3.14-, 3.15-
High-strength steel tow, 3.16-U shape steel plate dops, the first annular panels of 3.17a-, the second annular panels of 3.17b-, 3.17c- the 3rd
Annular panel, 3.18- steel loops, 3.19- sealing plates, in 5.1- cutterhead bodies, 5.2- cutterheads spoke, 5.3- cutter head panels, 5.4-
Heart fish tail knife, 5.5- serrated knives, 5.6- cutting knifes, 5.7- edge blades, 5.8- shells knife, 5.9- hobboing cutters, 5.10- abrasion detections dress
Put, 5.11- mud scour holes, 5.12- alloy wear-resisting plates, 5.13- reinforcements.
Embodiment
With reference to accompanying drawing, the embodiment of the present invention is further described：
A kind of high hydraulic pressure soft soil layer as shown in Figure 1 to 4（HFE）Composite shield originating method, suitable for all rich waters
Stratum originates, but head is high, water is big, do not possess originate precipitation condition soft soil layer in advantage it is particularly evident, it is described
Originating method comprises the following steps：
S1, according to hydrological geological conditions and Water And Earth Pressures calculate strengthening length, generally, shield（Left and right line）On the outside of external diameter
3.0m, it is stabilization zone in the range of bottom, each 3.0m in top, strengthening length is abolished rear Water And Earth Pressures according to portal and calculated, and ensures to reinforce
The soil body afterwards need to have good uniformity and self-support stability, and the soil mass consolidation unconfined compressive strength of 28 days reaches
More than 1.0Mpa, coefficient of permeability K≤1 × 10-7cm/s.
High-pressure rotary-spray construction is required according to design drawing, arrangement and method for construction is worked out and carries out test pile, determined according to test pile result
Construction parameter is simultaneously constructed, and is reduced rotary jet strengthening body intensity as far as possible on the basis of design requirement is met, is easy to the later stage to tunnel；
S2, Deepen Design carried out to consolidation by freezing 2 according to overall design requirement, according to design arrangement freezing pipe 7 and thermometer hole 8, surveyed
Lay thermometric line in warm hole 8, freezing equipment and freeze to start to freeze after pipeline installation and debugging；According to overall design requirement to freezing
Knot carries out Deepen Design, and while construction needs are met, freezing pipe is arranged in line with scientific and reasonable, economic pragmatic principle.Shield
Structure originates and 2 row's freezing holes is respectively arranged on the outside of the line starting end head diaphragm wall of left and right, single 34 freezing holes in termination, pitch of holes
750mm.In order to accurately grasp the state of development of freezing curtain, freeze to enclose in each termination within the scope of curtain and design freezing range
Thermometer hole is arranged at edge, lays thermometric line, is reinforced in specific implementation and is set 3 thermometer holes, thermometric hole site can be according to deviational survey
Actual conditions are arranged.
Specifically construction technology is：Equipment Foundations setting-out → construction equipment basis → equipment is in place, leveling, fixation → laying
Cable → installation electric-control system → refrigerator leak test → refrigerator fills fluorine, oiling → cooling pond water filling → salt dissolving water → refrigeration system
System test running → brine tank and refrigerator low-temperature (low temperature) vessel and pipeline heat insulation.
Freezing Station pipeline mounting process is：Main line setting-out → installation pipe support → installation main line → installation branch line → installation
Pressure is incubated with temperature point → pipeline leak test → saline line.
Debugged after freezing equipment installs and test running.In test running, each shape such as pressure, temperature is adjusted at any time
State parameter, unit is set to be run under the conditions of the technical parameter about technological procedure and design requirement.In freezing process, timing is examined
Brine temp, brine flow and frozen soil wall spread scenarios are surveyed, adjust freezing system operational factor if necessary.Freezing system operates just
Enter after often and actively freeze, it is desirable to which brine temp is down to less than -25 DEG C in one week.
S3, complete the complete machine assembly and adjustment of shield machine 6 and vertical transit system and horizontal transportation system, mud disposal system,
The installation and debugging such as pulping system, refrigeration system actively freezes during above-mentioned work, installs reaction frame and starts assembled negative endless tube piece
Shield launching state is formed after 12；
External steel loop device 3 is connected with outside S4, the steel loop of station main body portal 9；
After S5, shield launching preparation are completed and consolidation by freezing 2 reaches design effect, piecemeal, layering, from the inside to surface, from upper
Mode under abolishes portal building enclosure 4, and native side reinforcing bar is met in reservation, and portal 4 continues maintenance during abolishing and freezed, and carries out jelly
Knot reinforces 2 leakage face insulations in vitro.
S6, portal 4 are abolished finish and clear up after the completion of hand smeared in the external steel loop device 3 put the oil fat.
S7, the external hand of steel loop device 3, which are put the oil after the completion of fat is smeared, continues assembled negative endless tube piece 12, by shield machine 6 to sinciput
Enter, before shield machine 6 enters portal, lubricating oil is applied in the peripheral and external outside of 3 cord rubber slab of steel loop device 13 of cutterhead 5, in order to avoid
The hanging breaking cord rubber slab 13 of cutter head of shield machine 5 influences sealing effectiveness, and to ensure the safety of freezing pipe 7, shield body is moved forward into freezes body 2
Preceding 20cm stops jacking.
S8, the working face of shield machine 6 build pressure.
S9, after being established when mud hydraulic pressure, ensuring external 3 sealing effectiveness of steel loop device, you can start tunnel profile in freeze
Knot pipe 7 is pulled out, and remaining freezing pipe 7 continues to freeze.
S10, shield machine 6 slowly tunnel steadily, fully enter external steel loop device 3 when tunneling to shield body, only the side of pulpboard 10
Edge is slightly more forward than the external alien invasion of steel loop device 3, and the external hole of steel loop device 3 circle brush 14 intersects with only pulpboard 10 but not yet departed from
Preceding pause driving.
S11, enclosed after shield machine stops the external steel loop device 3 of the entrance of pulpboard 10 in the external alien invasion of steel loop device 3 welding one
Arc 11, gap between external steel loop device 3 and section of jurisdiction 12 is blocked, if necessary can be between arc 11 and hole circle brush 14
Wadding quilt is filled in, plug, which fills out thing, can not influence hole circle 14 resiliences of brush, it is ensured that shield tail passes through external steel loop device 3 of external steel loop device moment
With the sealing effectiveness of section of jurisdiction 12.
S12, continuation are slowly pushed ahead steadily, when shield tail fully enters external steel loop device 3, and disengage the ring of shield tail 1 ~ 2
After start synchronous grouting.
S13, shield body 6 fully enter the steel loop of portal 9 and complete to gradually step up otch hydraulic pressure to theory after portal strengthens slip casting
Calculated value, completion originate driving, stop Freezing Station operating, pull out remaining freezing pipe 7, originate driving and complete, into normal driving
Construction.
The step S8 excavation faces build briquetting and contain herein below：
(1) the external closed chamber grease of steel loop device 3 injection
When cutterhead is advanced to precalculated position, connecting external steel loop device with greasing pipe reserves greasing hole and grease distributing valve, opens
Greasing gate valve, grease is reserved greasing hole from external steel loop device 3 and inject in external steel loop device 3, fill up its space；To prevent
The percolating water of portal 9, mud hydraulic pressure is avoided to lose, grease injection pressure should be greater than otch hydraulic pressure, form overflow.
(2) muddy water builds pressure
After grease injection reaches predetermined pressure, mud tube is opened, lifting step by step excavates storehouse liquid level, observes external steel loop device 3 and leak
Slurry situation, suspend mud injection if spillage, continue to fill grease at spillage, if portal 9 reaches sealing effectiveness, progressively carry
High otch hydraulic pressure, can be tried one's best in allowed limits to ensure the external sealing effectiveness of steel loop device 3, when building pressure reduces otch muddy water
Pressure, reduces pressure of the muddy water to external steel loop device 3, and otch mud hydraulic pressure forbids the pressure voltage more than the cord rubber of portal 9.
Step S9, the S13 freezing pipe 7 is pulled out comprising herein below：
A, it is that 100~150kw electrothermal tubes heat salt solution that general power is installed in brine tank.
B, it is a collection of with every 2~3 groups of freezing pipes 7, hot salt brine is circulated in freezing pipe 7 or temperature tube 8.
C, when frozen soil melts 3~5cm around freezing pipe, pulled out with casing puller or very heavy jack-up in time and loosened freezing pipe 7.
D, the freezing pipe 7 loosened is quickly extracted with crane.
E, clay or low-grade cement mortar sealing of hole are used after tube drawing.
The step S12 originates synchronous grouting and selects cement mortar, waterglass dual slurry, and dual slurry is controlled in injection process
The outlet pressure of injection, avoid damaging shield tail.
As shown in figure 5, the present invention tunnels combined type cutter head structure using new soft soil layer slurry shield extra long distance,
Reinforcement 5.13 is connected with using cutterhead spoke 5.2 and the composite structure of cutter head panel 5.3, and between the two, on cutterhead body 1
Center fish tail knife 5.4, serrated knife 5.5, cutting knife 5.6, edge blade 5.7, shell knife 8, hobboing cutter 9 are installed tunneling boring is carried out to tunnel
Excavate, positive and negative bidirectional rotation can be achieved；According to different geology operating modes, center fish tail knife 5.4 and serrated knife 5.5 can whole or portions
Divide and be replaced with hobboing cutter 5.9.The aperture opening ratio of cutterhead body 5.1 about 37%, compound design, which can provide, to be propped up the machinery of face
Support, bulk strength and rigidity meet the driving requirement of tunneling boring hard rock, increase the reliability of cutterhead body 5.1, while can prevent
Big particle diameter boulder enters to excavate cabin and formed and blocked.
Cutterhead body 1 is anterior to be provided with continous way wear detector 5.10, and the wear condition of cutter effectively can be examined
Survey, cutterhead outer ring is welded with embedded alloy wearing plate 5.12, in addition to wear-resisting functions, moreover it is possible to ensures the diameter of cutter head 5.1.Cutterhead master
64 cutting knifes 5.6 are installed, including the both ends of cutterhead spoke 2 are grown along it and cut to being symmetrically arranged with 48 on the cutterhead spoke 5.2 of body 1
The 16 of intraoral setting are welded with latticed wear-resisting cutting knife 5.6, the side heap of cutting knife 5.6 on knife 5.6 and the Y shape of cutter head panel 3
Layer, be advantageous to protect cutter corner and reduce abrasion；Blade can be extended using the design of large-sized three rows wearable hard alloy
Cutter life；Segment design is 5 degree of horn structure forms of band, effectively increases the ability that quarrel soil is peeled off in the cutting of cutting knife 5.6；
In the fringe region close to cutterhead body 5.1, the quantity of cutters layout is added, improves the service life of edge blade 5.7.
It is disposed with the panel of cutterhead 5.1 on 29 shell knives 5.8, including the cutter head panel 5.3 of one, three quadrants and sets respectively
It is equipped with 6 shell knives 5.8, two, be respectively arranged with 4 shell knives 5.8 on the cutter head panel 5.3 of four-quadrant, in addition in cutterhead spoke
The 9 of bar 5.2 and the outer rim of cutterhead body 5.1 are shell knife 5.8.Wherein, connect positioned at cutterhead spoke 5.2 and the outer rim of cutterhead body 5.1
The 9 of position are touched shell knife 5.8, including the marginal position at three of cutterhead spoke 5.2 each 2 is shell knife 5.8, cutterhead spoke at one
5.2 in marginal position 3 shell knife 5.8,9 altogether, all sizes of shell knife 5.8 are identical, and its height is 160mm, shell
Knife 5.8 can carry out peeling off broken, the mobility of improvement quarrel soil to quarrel soil；Blade is using the big alloy in both ends and middle three row's alloys
Combination Design, has very high impact resistance and anti-wear performance, and cutter hub surrounding build-up wear-resistant layer can prevent cutter hub to be cut
The erosive wear of soil.
The edge of cutterhead body 5.1 installation 16 is edge blade 5.7, including cutter head panel 5.3 and cutterhead outer rim contact position
8 and 8 of cutterhead spoke 5.2 and cutterhead outer rim contact position, edge blade 5.7 is clearing up the quarrel of periphery excavation
Soil, the direct abrasion of the outer rim of cutterhead body 5.1 is prevented, ensure the precision of digging diameter, blade uses three rows large-sized wear-resisting
Hard alloy, can tool life.
Cutterhead body 5.1 configures 8 on cutter head panel 5.3 and hobboing cutter 5.9 is revolved with reducing to originate with the high pressure of middle vertical shaft
Spray the abrasion of reinforcing body and the concrete element wall that may be used to the cutter of cutterhead body 5.1.Serrated knife 5.5, shell knife 5.8, cutting knife
5.6 height reduce successively, contact face successively, reduce knife disc tool abrasion, cutterhead spoke 5.2 is in the interstitial site of cutting knife 5.6
It is provided with mud scour hole 5.11.
Number of changing knife can be effectively reduced using the present invention, extend cutterhead life-span, raising drivage efficiency, reduction construction risk,
With larger promotional value.
External mounted shield launching portal hermetic seal device as shown in Fig. 6~Figure 11, by close by twice turnover panel heavy curtain
Seal and three seals two seal cavities of formation that wire brush sealing is formed are lengthened with together with, cavity internal pressure grease injection when originating, really
Confidential letter effect, when shield launching is sealed by portal, the propulsion of rubber heavy curtain, the bending direction of turnover panel and wire brush and shield
Direction is consistent, with the material such as water, sand or slurries flow direction on the contrary, Water And Earth Pressures are acted on rubber heavy curtain and wire brush, heavy curtain and
Wire brush stirrup shield body or section of jurisdiction and grease play sealing function jointly.
External mounted shield launching portal hermetic seal device includes the external steel loop dress of the supporting pre-buried steel loop 1 of portal, portal
Put 3.3, twice rubber heavy curtain 3.4, twice turnover panel 3.5, wire brush 3.6, oil addition hole 3.7, sealing plate 3.19 and strengthen
Gusset 3.9 forms, and is sealed to lengthen wire brush 3.6 with together with and seal by twice turnover panel 3.5, rubber heavy curtain 3.4 and forms two sealings
Cavity., can be by oil addition hole 3.7 to cavity internal pressure grease injection, it is ensured that sealing effectiveness when originating.
The pre-buried steel loop 1 of portal pours integral, the diameter and shield of the pre-buried steel loop 1 of portal by dowel with station agent structure
Structure machine outer dia matches, when originating, the pre-buried steel loop 3.1 of portal 200 ~ 300mm generally big compared with shield machine；The pre-buried steel loop of portal
3.1 back sides are arranged parallel to the flange of metope, reserve 72 bolts hole of φ 24 on flange, are uniformly distributed with 5 ° of angles along flange,
The pre-buried steel loop 3.1 of portal and the preferably thick 16mm of flange thickness, can slightly be adjusted according to shield machine diameter, when shield machine diameter compared with
When big, the pre-buried steel loop 3.1 of portal and flange thickness can accordingly increase.
The external steel loop device 3.3 of portal is formed by three pieces of ring surface plate welds positioned at the inner side of steel loop 3.18, annular panel
Including first annular panel 3.17a, the second annular annular panel 3.17c of panel 3.17b and the 3rd, its structure is identical, and thickness is equal
For 16mm, internal diameter steel loop 3.1 pre-buried with portal is identical, the 3.18 wide 700mm of steel loop contained by the external steel loop device 3.3 of portal, the
One annular panel 3.17a, the second annular panel 3.17b, the 3rd annular panel 3.17c and outside steel loop 3.18 thickness are
20mm, first of annular annular panel 3.17b of panel 3.17a and second are provided with bolt hole, bolt hole size, position and portal
Connecting hole on pre-buried steel loop 3.1 matches, second annular panel 3.17b, the 3rd annular panel 3.17c and steel loop 3.18
Between be evenly arranged 24 pieces of stiffener plates 3.9 respectively.
Turnover panel 3.5 is made up of fixed plate 3.11, axis 3.12 and folding pressing plate 3.13, thickness 20mm, width and length
Determined according to shield machine size, fixed plate 3.11 is separately fixed at the annular panel 3.17b of first annular panel 3.17a and second
On, folding pressing plate 3.13 can rotate along axis 3.12, and shield machine forms rigid support after tunneling forward after rubber heavy curtain 3.4,
Prevent rubber heavy curtain 3.4 from turning over.
By wide 100mm, the thick 1mm inner clip high-strength steel tow 3.15 of zinc-plated reinforcement steel plate 3.14, one end passes through wire brush 3.6
U-shaped steel board first 3.16, which is fixed, is integrated into the wide wire brushes 3.6 of 100mm, U-shaped steel plate 3.16 thick 4mm, long 176mm, steel tendon
3.15 length is according to the external steel loop device 3.3 of portal and the determination of section of jurisdiction gap, preferred length 60mm.
External mounted shield launching portal hermetic seal device passes through double end high-strength bolt 3.10a and the pre-buried steel loop 3.1 of portal
Installation rubber heavy curtain 3.4, first of annular panel among connection, the pre-buried steel loop 3.1 of portal and first annular panel 3.17a
Installation turnover panel 3.5 forms first of rubber turnover panel heavy curtain sealing, the outside of steel loop 3.18 and the pre-buried steel loop 3.1 of portal on the outside of 3.17a
Between welding 16 pieces of triangle gussets 3.9 strengthened, triangle gusset 3.9 is uniformly distributed；The sealing of second rubber turnover panel heavy curtain is fixed
On the second annular panel 3.17b, according to the second annular panel 3.17b, rubber heavy curtain 3.4, fixed ring flat-plate, turnover panel 3.5 it is suitable
Sequence is fixed by high-strength connecting bolt 3.10b；Wire brush 3.6 is connected by welding to 3.17c on the 3rd annular panel, forms the
Three wire brushes seal.Oil addition hole 3.7 makes at the scene, determines position as needed.
Sealing plate 3.19 stops pulpboard in shield tail and has just enter into the external steel loop device 3.3 of portal but wire brush 3.6 with only pulpboard still
Without departing from when, be welded on wire brush U-shaped steel board first 3.16, wherein sealing thickness of slab 10mm, width according to external ring 3.3 with pipe
Piece gap determines.
In use, the bottom of rubber heavy curtain 3.4 and turnover panel 3.5 contacts with shield machine external diameter 3.2, sealing plate 3.19 and section of jurisdiction
External diameter 3.8 contacts, and ensures to seal with this, reaches water-stagnating effect.
Combined type cutterhead is tunneled by soft soil layer slurry shield extra long distance and the sealing of external mounted shield launching portal stops
The utilization of water installations, advantageously originate safety in the high hydraulic pressure weak soil basic unit composite shield for ensureing the present invention.
Claims (7)
1. a kind of high hydraulic pressure soft soil layer HFE composite shield originating methods, it is characterised in that comprise the following steps：
S1, calculated to carrying out subsidence pressure circle spray reinforcement in the range of 3 meters on the outside of shield machine according to hydrological geological conditions and Water And Earth Pressures
（1）；
S2, construction freezing pipe（7）And thermometer hole（8）, thermometric line is laid, freezing equipment and freezes to open after pipeline installation and debugging
Beginning freezes；
S3, the end soil body reinforced is checked, it is ensured that foundation bearing capacity starts shield after meeting lifting appliance construction safety
Structure machine assembles, while completes counter-force and support and carry out shield launching preparation after starting assembled negative endless tube piece；
S4, when slurry shield originates, need be connected with external steel loop device station main body outside main body portal steel loop AT STATION
Portal（9）External steel loop device is connected with outside steel loop（3）；
S5, shield launching preparation is completed and consolidation by freezing（2）After reaching design effect and keeping stable, abolish portal and go along with sb. to guard him
Structure（4）；
S6, for ensure sealing effectiveness and shortening build pressure the time, portal is abolished finish and clear up after the completion of in external steel loop device（3）
Lubrication and seal grease is smeared in the airtight cavity of formation；
S7, external steel loop device（3）Lubricant grease continues assembled negative ring after the completion of smearing, by shield machine（6）Jacking forward, shield
Machine（6）Into before portal, lubricating oil is applied on the outside of cutterhead periphery and cord rubber slab, in order to avoid shield machine（6）Cutterhead hanging breaking cord
Rubber slab influences sealing effectiveness, while to ensure freezing pipe safety, by shield machine（6）Move forward to the position of 20cm before freezes body
Put stopping jacking；
S8, work as shield machine（6）It is advanced to behind precalculated position and pressure is built to its working face；
S9, work as shield machine（6）Mud hydraulic pressure is established and ensures external steel loop device（3）After sealing effectiveness, to freezing in driving profile
Knot pipe（7）Pull out, remaining freezing pipe（7）Work on and apply jelly；
S10, shield machine（6）Originating stage driving should slowly be steered a steady course, and fltting speed is controlled no more than 10mm/min, works as pick
Proceed to shield body and fully enter external steel loop device（3）, shield tail edge is than external steel loop device（3）Alien invasion is slightly forward, external
Steel loop device（3）Hole circle brush（14）With only pulpboard（10）The intersecting but not yet preceding pause of disengaging is tunneled；
S11, work as shield machine（6）After shield tail is completely into portal, when the rubber water-proof door curtain made of cloth and pressing plate and section of jurisdiction wall contacts, in shield
Tail enters external steel loop device（3）Afterwards in external steel loop device（3）The circle arc of alien invasion welding one（11）, external steel loop is filled
Put（3）Gap is blocked between section of jurisdiction；
S12, continue slowly to push ahead shield machine, when shield machine is completely into external steel loop device（3）And depart from shield tail 1~
Start synchronous grouting after 2 rings；
S13, shield machine（6）Shield body fully enters portal steel loop and completes to gradually step up otch hydraulic pressure famous dictum after portal strengthens slip casting
By calculated value, completion originates driving, stops Freezing Station operating, pulls out remaining freezing pipe（7）, into normal tunneling construction.
A kind of 2. high hydraulic pressure soft soil layer HFE composite shield originating methods according to claim 1, it is characterised in that
Shield machine in step S8（6）Working face builds pressure, refers to external steel loop device（3）After the injection of closed chamber grease, shield machine is carried out
Muddy water builds pressure.
3. a kind of high hydraulic pressure soft soil layer HFE composite shield originating methods according to claim 1 or 2, its feature exist
The freezing pipe in, step S9 or step S13（7）Pull out and include herein below：
A, it is that 100~150kw electrothermal tubes heat salt solution that general power is installed in brine tank；
B, with every 2~3 groups of freezing pipes（7）To be a collection of, in freezing pipe（7）Or thermometer hole（8）It is middle to be circulated hot salt brine；
C, freezing pipe is treated（7）When surrounding frozen soil melts 3~5cm, loosening freezing pipe is pulled out with casing puller or very heavy jack-up in time（7）；
D, the freezing pipe loosened is quickly extracted with crane（7）；
E, clay or low-grade cement mortar sealing of hole are used after tube drawing.
A kind of 4. high hydraulic pressure soft soil layer HFE composite shield originating methods according to claim 3, it is characterised in that
Step S12 slip castings use cement, waterglass dual slurry, and grouting pressure value is：0.1~0.3MPa, slip casting measure annular gap
1.3~1.8 times of theoretical volume.
5. a kind of high hydraulic pressure soft soil layer HFE composite shield originating methods according to claim 1 or 2, its feature exist
In external steel loop device in step S4（3）It is enough into first and the second road sealing device are by twice rubber by three seal structures
Sealing plate, turnover panel, Circular Plate, packing ring and bolt etc. is formed, and three seals are formed using welding shield tail brush sealing on the outside of steel loop
Two airtight cavities, the greasing hole with gate valve is reserved between the external closed chamber of steel loop device two.
6. a kind of high hydraulic pressure soft soil layer HFE composite shield originating methods, its feature exist according to claim 1 or 5
In external steel loop device includes steel loop（3.18）, steel loop（3.18）Inner side both ends are respectively arranged with along shield machine tunneling direction
One annular panel（3.17a）With the 3rd annular panel（3.17c）, steel loop（3.18）Middle inside position is provided with the second ring surface
Plate（3.17b）, first annular panel（3.17a）With the second annular panel（3.17b）It is connected to rubber heavy curtain（3.4）With turn over
Plate（3.5）, turnover panel（3.5）It is arranged on rubber heavy curtain（3.4）Rear side and the two for contact connect, the 3rd annular panel（17c）Even
It is connected to wire brush（3.6）And sealing plate（3.19）, steel loop（3.18）Oil addition hole is had between annular panel（3.7）,
First annular panel（3.17a）, the second annular panel（3.17b）With the 3rd annular panel（3.17c）Structure it is identical, and in it
Footpath and the pre-buried steel loop of portal（3.1）Internal diameter it is identical, be provided with annular panel and rubber heavy curtain（3.4）And turnover panel（3.5）Even
The bolt hole connect, turnover panel（3.5）Including fixed plate（3.11）, axis（3.12）With folding pressing plate（3.13）, fixed plate（3.11）
On be provided with bolt hole, folding pressing plate（3.13）Pass through axis（3.12）It is hinged on fixed plate（3.11）On, wire brush（3.6）Including
U-shaped steel board head（3.16）, U-shaped steel board head（3.16）Inside it is provided with high-strength steel tow（3.15）, high-strength steel tow（3.15）
Be provided at both ends with zinc-plated reinforcement steel plate（3.14）.
A kind of 7. high hydraulic pressure soft soil layer HFE composite shield originating methods according to claim 1, it is characterised in that
Portal building enclosure is abolished in step S5（4）According to piecemeal, layering, from it is inner to mode outside from top to bottom cut into
OK, the building enclosure internal layer cover to reinforcement for carrying on the back native side is cut first, and reinforcing bar is cut away with gas cutting, further cut and meet native side
Cover to reinforcement, untill reinforcing steel bars exposed, portal continue during abolishing keep consolidation by freezing, carry out frost table insulation,
Prevent freezes body from thawing.
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