CN110145364A - A kind of construction method of tunnel water handling structure - Google Patents
A kind of construction method of tunnel water handling structure Download PDFInfo
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- CN110145364A CN110145364A CN201910546766.2A CN201910546766A CN110145364A CN 110145364 A CN110145364 A CN 110145364A CN 201910546766 A CN201910546766 A CN 201910546766A CN 110145364 A CN110145364 A CN 110145364A
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- blind pipe
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- 238000005520 cutting process Methods 0.000 claims abstract description 19
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- 229910000831 Steel Inorganic materials 0.000 claims description 27
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- 239000004568 cement Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 239000011435 rock Substances 0.000 claims description 10
- 238000004080 punching Methods 0.000 claims description 9
- 239000011378 shotcrete Substances 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 238000004078 waterproofing Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000004587 polysulfide sealant Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 claims description 4
- 230000004087 circulation Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 4
- 239000004746 geotextile Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
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- 238000004026 adhesive bonding Methods 0.000 claims description 3
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Classifications
-
- 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
- E21D11/381—Setting apparatus or devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of construction methods of tunnel water handling structure, are laid with the seam waterproofs such as EVA compound water-proof and construction joint, deformation joint behind with lining cutting and attach most importance to, while improving concrete impermeable structure performance, form multiple defence line.There is special waterproof reinforced measure to weak parts such as construction joints, the waterproof effect of construction joint can be effectively ensured, improve the leakage performance in tunnel.
Description
Technical field
The present invention relates to technical field of tunnel construction, and in particular to a kind of construction method of tunnel water handling structure.
Background technique
During constructing tunnel, waterproof drainage is a particularly important link, is to guarantee that tunnel operates normally
Premise.Tunnel water handling is usually with concrete structure based on anti-, and in upstream face plus flexible waterproof layer, reinforcement is dredged pipeline and built
Erect the water-proof system of coming.The guarded drainage work of constructing tunnel should follow " comprehensive treatment, adaptation to local conditions, be conceived to anti-, row, it is stifled,
Cut " this basic principle, prevent wherein " anti-" strengthens tunnel by way of being primarily referred to as through additional waterproofing layer, pouring water-proof concrete
Seepage property avoids Groundwater infiltration；" row " is then to be arranged tunnel area ponding by machinery suction or free-draining mode
Out, to alleviate seepage pressure, freeze injury and ponding situation be to avoid；" stifled " is then to block wall-rock crack by the methods of slip casting
And the leakage water route that tunnel itself occurs；" cutting " is then that will likely import the water flow section of tunnel area by the way that intercepting ditch is arranged
It is disconnected.In addition to this incorporation engineering construction requirement, property and construction method is also answered to reinforce guarded drainage Construction control, mountain tunnel is anti-
Draining should follow based on arranging, cut, it is stifled supplemented by principle；And be in level of ground water tunnel below throughout the year, then multiple tracks should be set
Waterproof measure forms efficient airtight waterproof layer；Permanent water-resistant measure should be combined to carry out constructing tunnel as far as possible.
Tunnel construction environment is easy to be influenced by factor of natural environment such as rainfall and underground water, leakage thus occurs and asks
Topic.Tunnel, which leakage problem occurs not only, can weaken surrounding weak surrounding rock intensity, and Swelling Rock is caused to be in swelling state, right
Tunnel structure threatens safely, at the same also result in tunnel internal fog increase, ground it is excessively wet and slippery, and visibility is relatively
It is low, increase security risk.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of better anti-leakage property, drain smoothly tunnel water handling structure
Construction method.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
Design a kind of construction method of tunnel water handling structure, including following procedures:
(1) full tunnel is respectively provided with bilateral gutter；
(2) separate type EVA splash guard, thickness 1.5mm, geotextiles weight >=400g/m are set between preliminary bracing and secondary lining2,
Setting can bond splash guard on the outside of the lining cutting of open cut tunnel section；Setting the circumferential blind pipe of φ 50 after lining waterproof backboard, circumferential spacing is 6~
12m, two sides foundation set the longitudinal Permeable blind pipe of φ 100 and connect with abutment wall inlet opening, and abutment wall inlet opening is connect with hole internal drainage ditch；
(3) location developed for rock crusher, rich water, the easily location that collapses and underground water, and there may be gushing waters, prominent mud
V grades of country rock weak broken locations, using the measure strengthening stratum and water blockoff of front pre-grouting；
(4) construction joint, deformation joint use set external labeling type waterstop, middle buried water stop, water expandable waterstop, steel side rubber and stop
Water bar, brushing concrete interfacial agents composite water-proof structure；
(5) seepage-resistant grade of tunnel concrete liner structure is not less than P8, and the continuous placing of tunnel concrete, arch ring, inverted arch, bottom plate must not stay vertical
To construction joint.
Preferably, the laying method of splash guard described in process (2) includes the following steps:
A. preparation of construction: measurement tunnel cross-section modifies section using Mobile workbench, cuts jetting cement surface " botryoidalis "
The neat root of the ironwares such as exposed anchor pole head and steel bar end is cut off with electric welding or oxygen welding, is used cutting off position by agglomeration by preliminary bracing
Fine-stone concrete smoothes out covering, and for excavation face, seriously rough position must carry out repairing chisel and levelling；
Branch mask subscript goes out vault middle line and the section line perpendicular to tunnel axis in the early stage；Sealing wire is marked at splash guard edge
With vault middle line；Waterproof layer is intercepted by actual profile line length, symmetrical rolled for future use；
B. splash guard is laid with: the relatively narrow waterproof roll of breadth being spliced into large format splash guard, splash guard overlaps width >=15cm, adopts
It is bonded with hot weld；
It is anchored on combined bolting and shotcrete with nailing gun by rib is hung, is promoted splash guard onto trolley using small winch, with
It is directed at tunnel middle line in the middle part of the full width of splash guard, according to splash guard breadth size, splash guard is held up close to combined bolting and shotcrete surface
It is laid with, splash guard system is hung on rib, fixed point spacing: abutment wall 0.8m~1m, arch 0.5m~0.8m；
C. it welds splash guard overlapping the slot: overlapping width there are 15cm is not less than in the waterproof plate connector of two width large formats of circulation up and down
Face, overlapping part is using double weld seam welding；Match welding machine automatically with two-wheel to connect overlapping the slot, slit width degree is not less than 2cm.
It should be noted that concrete surface needs guarantee substantially smooth before splash guard is laid in splash guard process of deployment；Outside anchor pole tail portion
Dew length is cut away；Construction of waterproof layer section does not have bursting work.Splash guard and the laying quality of geotextiles meet design and specification
It is required that.Before concrete- liner is perfused, welding and the laying quality of splash guard are checked, it is just quasi- after qualified to be perfused.
Preferably, the installation method of circumferential direction blind pipe described in process (2) are as follows: the first positioning marking on jetting cement face, positioning
Scribing line passes through the pocket of injection level and has the place of EXIT POINT；Along the line with the plastic cloth of 0.2mm thickness, the thin lattice iron of φ 4mm
Silk screen covers circumferential blind pipe, using cement steel nail by plastic cloth and wire netting nail in just spray concrete surface, with fixed circumferential blind pipe, steel
Follow closely 50~100cm of spacing；It is concentrating EXIT POINT to drill along water source direction, then single diversion blind pipe is inserted, is used in combination
Quick-setting mortar by surrounding envelope along stifled, so that underground water concentrates outflow from pipe；The circumferential direction blind pipe is flexible porous tube.
Preferably, the installation method of longitudinal direction blind pipe described in process (2) are as follows: in abutment wall bottom unwrapping wire, drill, squeeze into along the line
Expansion bolt, installs longitudinal blind pipe, blocks blind pipe with clamp, is fixed on expansion bolt.
Preferably, pass through three between circumferential direction blind pipe described in process (2) and longitudinal blind pipe, between longitudinal blind pipe and tapping pipe
Lead to and connect, junction is carried out connected with adhesive waterproof tape；The spacing of blind pipe and jetting cement level is not greater than 5cm, blind pipe and scar
The maximum length of disengagement is not greater than 10cm.
Preferably, circular construction joint described in process (4) uses outer patch rubber fastening band buried rubber fastening band in, peace
Dress method are as follows: lining template trolley for baffle locking plug template uses punching block and wooden model combined type, and punching block is fixed on the car, U-shaped hole sliding
Adjustment when installing buried water strip, will be clipped among punching block and wooden model in waterstop point, circumferential to exist according to 0.5~1.0m of interval
10 reinforcing bar fixation of φ is installed on bulkhead, outer patch waterstop is squeezed when wooden model is installed and is fixed on the inside of splash guard, simultaneously
Circumferential spacing installs 10 reinforcing bar fixation of φ according to 0.5~1.0m.
Preferably, longitudinal direction construction joint described in process (4) is blind buries steel side waterstop in outer patch rubber fastening band, installs
Method are as follows: longitudinal construction joint is fixed on splash guard by the way of gluing or welding before the short side base of lining cutting or abutment wall construction,
In bury steel while waterstop pour building lining it is short while base or while abutment wall, manually plugged in time, in bury half, exposed one
Half, while batch reinforcing bar is connect using φ 16 and is fixed according to spacing 35cm.
Preferably, waterproofing of movement joints handle: between deformation joint be arranged outer patch rubber fastening band, in buried steel side waterstop,
Polyethylene foams plate and two-component polysulfide sealant caulking material；Arch wall deformation joint lining cutting outer rim and splash guard engaging portion
Position uses outer patch waterstop, and centre is used steel side waterstop, blocked within the scope of the 3cm of lining cutting inner edge with polysulfide sealant, remaining is empty
Gap is clogged closely knit using joint sealing material.
The beneficial effects of the present invention are:
1. in the construction method of tunnel water handling structure of the present invention, the laying construction technique of splash guard is simple, strong operability, applies
The flames of anger during work, it is smokeless, generated without toxic gas, construction environment is required it is low, it is narrow especially suitable for tunnel, pipeline etc.
Space and ventilation condition difference and the environment construction for having infiltration water；Connection between splash guard is welded using dedicated double slit heat seal welding machine
Connect, solder design effect is good, intensity is high, using double weld seams using inflation check, welding quality can identifying by naked eye, waterproof effect
It is good.
2. circle draining blind pipe, longitudinal drainage blind pipe, tapping pipe and gutter collectively constitute drainage system, at the beginning of composite lining
Drainage systems are set after branch, blind pipe is pooled to blind pipe by splash guard in the behind of splash guard, the bottom of two linings, water, via
Blind pipe is pooled to two sides gutter, and being connected firmly of the pipeline in drainage system, water route are unimpeded, can prevent water, mud from scurrying into
Blind pipe is drained with blocking, in time, efficiently, swimmingly the water generated in tunnel can be discharged.
3. the water-proofing treatment of construction joint and deformation joint can be influenced to generate in concrete by external environment, temperature change
When generating differential settlement when contraction distortion or between concrete, concrete crack leak is prevented.
4. the waterproof and water drainage system established using the construction method of tunnel water handling structure of the present invention, tunnel water proofing are carried on the back with lining cutting
It is laid with the seam waterproofs such as EVA compound water-proof and construction joint, deformation joint afterwards to attach most importance to, while improving concrete impermeable structure performance,
Form multiple defence line.Using multi layer waterproof measure and drainage system, there is special waterproof reinforced to arrange the weak parts such as construction joint
It applies, the waterproof effect of construction joint can be effectively ensured, improve the leakage performance in tunnel.The present invention takes solid measure,
Achieve the purpose that waterproof is reliable, drains unimpeded, economical rationality.
Detailed description of the invention
Fig. 1 is splash guard sling point schematic diagram；
Fig. 2 is the arrangement schematic diagram of circle draining blind pipe；
Fig. 3 is the fixed form schematic diagram of circle draining blind pipe；
Figure label: 1 abutment wall end line, 2 vault middle lines, 3 spring lines, 4 splash guard sling points；5 circle draining blind pipes, 6 longitudinal rows
Water blind pipe, 7 abutment wall substrates, 8 abutment wall inlet openings, 9 thin lattice wire nettings, 10 cement steel nails, 11 preliminary bracings, 12 splash guards.
Specific embodiment
Illustrate a specific embodiment of the invention below with reference to embodiment, but following embodiment is used only to be described in detail
The present invention does not limit the scope of the invention in any way.Related equipment component is as without especially in the examples below
Illustrate, is conventional equipment element；The related raw material of industry is commercially available regular industrial raw material unless otherwise instructed.
Embodiment 1: a kind of construction method of tunnel water handling structure, including following procedures:
(1) full tunnel is respectively provided with bilateral gutter；
(2) separate type EVA splash guard, thickness 1.5mm, geotextiles weight >=400g/m are set between preliminary bracing and secondary lining2,
Setting can bond splash guard on the outside of the lining cutting of open cut tunnel section；50 circle draining blind pipe of φ is set after lining waterproof backboard, circumferential spacing is 6
~12m, two sides foundation set the longitudinal Permeable blind pipe of φ 100 and connect with abutment wall inlet opening, and abutment wall inlet opening and hole internal drainage ditch connect
It connects；
(3) location developed for rock crusher, rich water, the easily location that collapses and underground water, and there may be gushing waters, prominent mud
V grades of country rock weak broken locations, using the measure strengthening stratum and water blockoff of front pre-grouting；
(4) construction joint, deformation joint use set external labeling type waterstop, middle buried water stop, water expandable waterstop, steel side rubber and stop
Water bar, brushing concrete interfacial agents composite water-proof structure；
(5) seepage-resistant grade of tunnel concrete liner structure is not less than P8, and the continuous placing of tunnel concrete, arch ring, inverted arch, bottom plate must not stay vertical
To construction joint.
Wherein, the laying method of splash guard includes the following steps:
A. preparation of construction: measurement tunnel cross-section modifies section using Mobile workbench, should cut jetting cement surface first
The neat root of the ironwares such as exposed anchor pole head and steel bar end is cut off with electric welding or oxygen welding, is being cut by " botryoidalis " agglomeration by preliminary bracing
It is covered except position is smoothed out with fine-stone concrete, to prevent puncturing splash guard.For excavation face, seriously rough position must carry out repairing chisel
With it is levelling.
Obvious hollow is smoothed out using fine-stone concrete.Base Smoothness is detected using the guiding ruler (L) of 1m, when guiding ruler to arc
The distance at middle part is met the requirements when being greater than 200mm less than the least radius of Dmm(, that is, D/L < 1/16) or circular arc.In the early stage
Branch mask subscript goes out vault middle line and the section line perpendicular to tunnel axis.
Check the quality of splash guard, if having the defects of discoloration, aging, ripple, tool marks, tearing, hole；In waterproof edges of boards
Mark sealing wire and vault middle line in edge；Waterproof layer is intercepted by actual profile line length, symmetrical rolled for future use.Longitudinal laying length is pressed
Long be outside one's consideration of two linings arch concrete arranges greater than 100cm.Splash guard sling point schematic diagram is referring to Fig. 1.
B. splash guard is laid with: the relatively narrow waterproof roll of breadth is spliced into large format splash guard, splash guard overlap joint is wide >=
15cm is bonded using hot weld；
The relatively narrow waterproof roll of breadth must be spliced into large format splash guard outside hole on spacious smooth place by splash guard.It is anti-
Water plate must carry out the defects of checking whether there is discoloration, ripple (became uneven), spot, tool marks, tearing, aperture, if there is matter
Doubt is measured, carries out pulling test, waterproof test and weld seam test for tensile strength immediately.
Hang splash guard trolley it is in place after, with electric welding or gas welding by the exposed anchor pole head of preliminary bracing, steel mesh head etc.
The neat root excision of ironware, and mortar covering is smeared, to prevent puncturing splash guard.For excavation face, seriously rough position must be repaired
It digs and levelling.
Splash guard is laid with and is to hang: it is anchored on combined bolting and shotcrete with nailing gun by rib is hung, it will using small winch
Splash guard is promoted onto trolley, to be directed at tunnel middle line in the middle part of the full width of splash guard, according to splash guard breadth size, by splash guard
It holds up and is laid with close to combined bolting and shotcrete surface, splash guard system is hung on rib, fixed point spacing: abutment wall 0.8m~1m, arch
0.5m~0.8m；
C. it welds splash guard overlapping the slot: overlapping width there are 15cm is not less than in the waterproof plate connector of two width large formats of circulation up and down
Face, overlapping part is using double weld seam welding；Match welding machine automatically with two-wheel to connect overlapping the slot, slit width degree is not less than 2cm.
Quality examination: checking overlapping the slot and sling point seam, if any the person that do not meet quality requirement, is mended in time
Weldering processing, to meet quality requirement.When being laid with splash guard at attached cavern, first processed according to the size and shape of attached cavern anti-
Water plate connects on the combined bolting and shotcrete of cavern's inner wall, and connects into an entirety with abutment wall splash guard.
When fixed splash guard, according to the flatness in combined bolting and shotcrete face, splash guard is reserved into enough surplus capacities, with anti-over tightening
And it is racked by concrete.
To keep the connection of splash guard connector good, the every ring laying length of splash guard is longer than adjoining rock to be not less than 1m, with benefit
Connector connection construction.Splash guard seam and lining construction seam are staggered not less than 1.0m.After splash guard is laid, concrete is perfused as early as possible.
Splash guard connector is reserved in lining cutting end must take safeguard procedures, and when preventing face explosion, slungshot breaks splash guard.Splash guard is applied
After work, when subsequent handling operation, will prevent from destroying splash guard.
Elastic appropriateness is wanted in the laying of splash guard, makes it to be tightly attached on jetting cement surface, reason tension is not torn；It crosses
Pine, non-woven fabrics splash guard fold are accumulated to form artificial water storage point.Splash guard is burnt to prevent electric heating to be welded with device, can be served as a contrast on it
Upper sheathing paper.Splash guard once-paving length recycles placing length according to concrete and determines, and leading lining construction 2~3 circulations.
Splash guard quality examination
1. visual examination: uniformly continuous is answered in splash guard laying, and weld width is not less than 20mm, and lap width is not less than 15cm, weldering
Seam should smooth, corrugationless, uniformly continuous, no dry joint solder skip, welded, burn-through or phenomena such as interlayer.
2. weldquality inspection: splash guard overlapping part weld seam is double weld seams, and centre reserves gap to inflate and to check.Inspection
Checking method are as follows: first block one end of air channel, then inflate pressurization from the other end with air monitor.With No. 5 injection needles with
Inflator is connected, and pressure gauge is set at syringe needle, and inflator is inflated, and when pressure reaches 0.25Mpa, stops inflation, and keeping should
Pressure reaches 15min, and pressure fall is air tight within 10%, and otherwise explanation, which has, does not weld place, is coated in welding with suds
It sews on, generates bubble place and weld again, the repair weldings such as hot air welding gun and electric iron can be used, until air tight.Check quantity
The principle of random sampling is taken, every 10 weld seam odd tests one, to guarantee quality, every heat-sealing machine welding should produce one daily
Sample indicates sample position, welding operator and date, checks and is used for test.
Overlap joint welding and hanging spotweld are checked, if any the person that do not meet quality requirement, should be carried out at repair welding in time
Reason, to meet quality requirement.Reinforcing bar protects waterproof layer when binding, all to lean on splash guard side reinforcing bar crotch and binding iron
Silk interface should be located at away from splash guard side.Fire-proof plate must be set when welded reinforcement around to carry out picking up gear, in case electric spark is burnt
Bad waterproof layer.Concrete cannot touch splash guard when vibrating.
3. elasticity detection (hanging surplus): splash guard is pushed with waddy end, if it can be made to touch spray-up table
Face then shows that the pine of splash guard into appropriate, be otherwise not required to the elasticity of adjustment splash guard, meet the requirements it.
The installation method of circle draining blind pipe are as follows: the first positioning marking on jetting cement face, line position are laid in principle by design
It carries out, but is appropriately adjusted according to the practical infiltration situation of hole wall, pass through the pocket of injection level as far as possible and have EXIT POINT
Place.Circle draining blind pipe is covered with the thin lattice wire netting of the plastic cloth of 0.2mm thickness, φ 4mm along the line, will be moulded using cement steel nail
Cloth and wire netting nail are expected in just spray concrete surface, to fix circle draining blind pipe, 50~100cm of steel nail spacing；Concentrating EXIT POINT
Drill along water source direction, be then inserted single diversion blind pipe, and with quick-setting mortar by surrounding envelope along stifled, so as to ground
It is lauched from pipe and concentrates outflow；The circle draining blind pipe is flexible porous tube.
The installation method of longitudinal drainage blind pipe are as follows: in abutment wall bottom unwrapping wire, drill along the line, squeeze into expansion bolt, install vertical
To draining blind pipe, blind pipe is blocked with clamp, is fixed on expansion bolt.
It is connected between circle draining blind pipe and longitudinal drainage blind pipe, between longitudinal drainage blind pipe and tapping pipe by threeway,
Junction is carried out connected with adhesive waterproof tape；The spacing of blind pipe and jetting cement level is not greater than 5cm, and blind pipe and scar disengage most
Long length is not greater than 10cm.
It is laid with flexible porous tube french drain by design requirement, when construction can be according to leakage scenarios appropriate adjustment, the big Shi Kejia of water
Big laying density.Weeper drain, which is first laid with, in construction re-lays splash guard.And french drain is introduced two sides gutter.
Circular construction joint buried rubber fastening band, installation method are as follows: lining shuttering platform in using outer patch rubber fastening band
Vehicle locking plug template uses punching block and wooden model combined type, and punching block is fixed on the car, and buried water strip is installed in U-shaped hole sliding adjustment
When, it will be clipped among punching block and wooden model in waterstop point, it is circumferential that 10 reinforcing bar of φ is installed on bulkhead according to 0.5~1.0m of interval
Fixation, outer patch waterstop are squeezed when wooden model is installed and are fixed on the inside of splash guard, while circumferential spacing is according to 0.5~1.0m
Install 10 reinforcing bar fixation of φ.
Longitudinal construction joint is blind to bury steel side waterstop, installation method in outer patch rubber fastening band are as follows: longitudinal construction joint exists
Be fixed on splash guard by the way of gluing or welding before the short side base of lining cutting or abutment wall construction, in bury steel side waterstop and pouring
While the short side base of lining cutting or abutment wall concrete, manually plugged in time, in bury half, exposed half, while stubble is connect using φ 16
Reinforcing bar is fixed according to spacing 35cm.
Waterproofing of movement joints processing: between deformation joint be arranged outer patch rubber fastening band, in buried steel side waterstop, polyethylene bubble
Foam plastic plate and two-component polysulfide sealant caulking material；Arch wall deformation joint lining cutting outer rim and splash guard binding site are using outer
Waterstop is pasted, centre is used steel side waterstop, blocked within the scope of the 3cm of lining cutting inner edge with polysulfide sealant, remaining gap uses and fills out
Sewing filling is closely knit.
Construction joint is easy leakage area, sets less as far as possible or deformation joint is combined to be arranged.Strictly construction joint is carried out by design requirement
With the construction of deformation joint.Deformation joint be since different-stiffness structure is by different power, allow to generate certain differential settlement and
The structure gap of setting is the key link of the outer waterproof of structure.Wherein the fixation of waterstop and installation method and construction joint stop
The installation of water band is identical.The concrete on vertical waterstop both sides will be reinforced vibrating in work progress, guarantee that the concrete on concrete both sides is closely knit,
Waterstop and the steam bubble on concrete surface are discharged simultaneously, it is ensured that waterstop and concrete are firmly combined, and the concrete at waterstop should not have slightly
Aggregate is concentrated or leakage phenomenon.Rubber fastening band and caulking material used in deformation joint must have outgoing to prove, and pass through
Entry test and the qualified rear of reinspection can be used, and the structural form and material of deformation joint have to comply with design requirement.
The present invention is described in detail above in conjunction with embodiment, but person of ordinary skill in the field can manage
Solution, without departing from the purpose of the present invention, can also change each design parameter in above-described embodiment, be formed
Multiple specific embodiments are common variation range of the invention, are no longer described in detail one by one herein.
Claims (8)
1. a kind of construction method of tunnel water handling structure, which is characterized in that including following procedures:
(1) full tunnel is respectively provided with bilateral gutter；
(2) separate type EVA splash guard, thickness 1.5mm, geotextiles weight >=400g/m are set between preliminary bracing and secondary lining2,
Setting can bond splash guard on the outside of the lining cutting of open cut tunnel section；50 circle draining blind pipe of φ is set after lining waterproof backboard, circumferential spacing is 6
~12m, two sides foundation set the longitudinal Permeable blind pipe of φ 100 and connect with abutment wall inlet opening, and abutment wall inlet opening and hole internal drainage ditch connect
It connects；
(3) location developed for rock crusher, rich water, the easily location that collapses and underground water, and there may be gushing waters, prominent mud
V grades of country rock weak broken locations, using the measure strengthening stratum and water blockoff of front pre-grouting；
(4) construction joint, deformation joint use set external labeling type waterstop, middle buried water stop, water expandable waterstop, steel side rubber and stop
Water bar, brushing concrete interfacial agents composite water-proof structure；
(5) seepage-resistant grade of tunnel concrete liner structure is not less than P8, and the continuous placing of tunnel concrete, arch ring, inverted arch, bottom plate must not stay vertical
To construction joint.
2. the construction method of tunnel water handling structure according to claim 1, which is characterized in that prevent described in process (2)
The laying method of water plate includes the following steps:
A. preparation of construction: measurement tunnel cross-section modifies section using Mobile workbench, cuts jetting cement surface " botryoidalis "
The neat root of the ironwares such as exposed anchor pole head and steel bar end is cut off with electric welding or oxygen welding, is used cutting off position by agglomeration by preliminary bracing
Fine-stone concrete smoothes out covering, and for excavation face, seriously rough position must carry out repairing chisel and levelling；
Branch mask subscript goes out vault middle line and the section line perpendicular to tunnel axis in the early stage；Sealing wire is marked at splash guard edge
With vault middle line；Waterproof layer is intercepted by actual profile line length, symmetrical rolled for future use；
B. splash guard is laid with: the relatively narrow waterproof roll of breadth being spliced into large format splash guard, splash guard overlaps width >=15cm, adopts
It is bonded with hot weld；
It is anchored on combined bolting and shotcrete with nailing gun by rib is hung, is promoted splash guard onto trolley using small winch, with
It is directed at tunnel middle line in the middle part of the full width of splash guard, according to splash guard breadth size, splash guard is held up close to combined bolting and shotcrete surface
It is laid with, splash guard system is hung on rib, fixed point spacing: abutment wall 0.8m~1m, arch 0.5m~0.8m；
C. it welds splash guard overlapping the slot: overlapping width there are 15cm is not less than in the waterproof plate connector of two width large formats of circulation up and down
Face, overlapping part is using double weld seam welding；Match welding machine automatically with two-wheel to connect overlapping the slot, slit width degree is not less than 2cm.
3. the construction method of tunnel water handling structure according to claim 1, which is characterized in that ring described in process (2)
To the installation method of draining blind pipe are as follows: the first positioning marking on jetting cement face, positioning marking by the pocket of injection level and
There is the place of EXIT POINT；Circle draining blind pipe is covered with the thin lattice wire netting of the plastic cloth of 0.2mm thickness, φ 4mm along the line, using water
Plastic cloth and wire netting nail are sprayed concrete surface in first by mud steel nail, to fix circle draining blind pipe, 50~100cm of steel nail spacing；?
It concentrates EXIT POINT to drill along water source direction, is then inserted single diversion blind pipe, and will be at surrounding envelope with quick-setting mortar
Along blocking up, so that underground water concentrates outflow from pipe；The circle draining blind pipe is flexible porous tube.
4. the construction method of tunnel water handling structure according to claim 1, which is characterized in that indulged described in process (2)
To the installation method of draining blind pipe are as follows: it in abutment wall bottom unwrapping wire, drills along the line, squeezes into expansion bolt, install longitudinal drainage blind pipe,
Blind pipe is blocked with clamp, is fixed on expansion bolt.
5. the construction method of tunnel water handling structure according to claim 1, which is characterized in that ring described in process (2)
It is connected between draining blind pipe and longitudinal drainage blind pipe, between longitudinal drainage blind pipe and tapping pipe by threeway, junction is used anti-
Glue band carries out connected；The spacing of blind pipe and jetting cement level is not greater than 5cm, and the maximum length that blind pipe and scar disengage must not
Greater than 10cm.
6. the construction method of tunnel water handling structure according to claim 1, which is characterized in that ring described in process (4)
Outer patch rubber fastening band buried rubber fastening band, installation method are as follows: lining template trolley for baffle locking plug template in are used to construction joint
Using punching block and wooden model combined type, punching block is fixed on the car, U-shaped hole sliding adjustment, when installing buried water strip, by waterstop
It is clipped among punching block and wooden model in point, it is circumferential that 10 reinforcing bar fixation of φ is installed on bulkhead according to 0.5~1.0m of interval, outside
Patch waterstop is squeezed when wooden model is installed and is fixed on the inside of splash guard, while circumferential spacing installs 10 steel of φ according to 0.5~1.0m
Muscle fixation.
7. the construction method of tunnel water handling structure according to claim 6, which is characterized in that indulged described in process (4)
Steel side waterstop, installation method are buried in outer patch rubber fastening band to construction joint is blind are as follows: longitudinal construction joint is in the short side base of lining cutting
Or abutment wall construction before be fixed on splash guard by the way of gluing or welding, in bury steel while waterstop pour building lining it is short while base
Or while abutment wall concrete, manually plugged in time, in bury half, exposed half, while using φ 16 connect batch reinforcing bar according to
It is fixed away from 35cm.
8. the construction method of tunnel water handling structure according to claim 7, which is characterized in that waterproofing of movement joints processing:
Between deformation joint be arranged outer patch rubber fastening band, in buried steel side waterstop, polyethylene foams plate and two-component polysulfide it is close
Sealing caulking material；Arch wall deformation joint lining cutting outer rim and splash guard binding site use outer patch waterstop, and centre uses steel side
Waterstop is blocked with polysulfide sealant within the scope of the 3cm of lining cutting inner edge, remaining gap is clogged closely knit using joint sealing material.
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