CN203613522U - Easily-assembled-and-disassembled tunnel portal water-retaining device for power plant circulating water system - Google Patents
Easily-assembled-and-disassembled tunnel portal water-retaining device for power plant circulating water system Download PDFInfo
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- CN203613522U CN203613522U CN201320759085.2U CN201320759085U CN203613522U CN 203613522 U CN203613522 U CN 203613522U CN 201320759085 U CN201320759085 U CN 201320759085U CN 203613522 U CN203613522 U CN 203613522U
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Abstract
The utility model relates to an easily-assembled-and-disassembled tunnel portal water-retaining device for a power plant circulating water system. The water-retaining device is characterized in that the water-retaining device is arranged on a mountain tunnel portal and comprises a water-retaining plate, a T-steel pull rod, a jack rear base plate, a valve operation pedestrian plate, a recharge water pipe and a jack, the tunnel wall of the tunnel portal is of a reinforced concrete structure, the recharge water pipe is buried in the top surface of the tunnel wall of the tunnel portal, and a valve is arranged on the top of the recharge water pipe. The jack rear base plate is fixed to the tunnel wall of the tunnel portal; the water-retaining plate is located outside the tunnel portal and is of an independent concrete structure, and the back side of the water-retaining plate makes sealing contact with the tunnel portal; one end of the T-steel pull rod is movably connected with the back side of the water-retaining plate, the other end of the T-steel pull rod is movably connected with the jack rear base plate, and then an easily-assembled-and-disassembled traction structure for preventing the water-retaining plate from toppling or getting separated from the tunnel portal is formed; a rubber water-stopping plate is arranged on the contact portion of the water-retaining plate and the tunnel portal, and then an elastic natural water-stopping structure is formed. The water-retaining device has the advantages that the water-retaining device is good in water retaining effect, convenient to operate, simple in structure and convenient to design and construct, the water-retaining plate is convenient to disassemble and hoist, residues do not remain, and investment is reduced.
Description
Technical field
The utility model relates to a kind of easy mounted-dismounted type tunnel mouth baffle device for water, particularly relates to a kind of easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system.Belong to power plant's water conservancy project technical field.
Background technology
In coastal Fossil Fueled Power Plant Project or nuclear power engineering, reclaimed water system generally adopts direct-flow water supply system, in marine site water intaking, after the cold and hot energy exchange circulation of power plant, then discharges go back to marine site.Due to factory site topographic and geologic condition, and the factor such as consideration technology and economic condition, recirculated water water intaking or the drainage channel of a lot of engineerings need to adopt the tunnel passing through in massif to realize.Described getting/water discharge tunnel, due to the needs of get/draining, is generally all positioned at b.s.l., after putting into operation throughout the year in seawater floodage.Under normal circumstances, tunnel mouth is positioned at good geological conditions place, bank, to facilitate tunnel entrance construction.Because the bank depth of water is generally more shallow, in order to meet the requirement of the get/draining depth of water, get/outfall is generally positioned at the deep water place of leaving bank certain distance, adopts reinforced concrete prefabricated getting/Box-shaped Drainage Culvert to be connected (seeing accompanying drawing 12) between get/outfall and tunnel mouth.
At present, the special blocking technology scheme that tunnel mouth adopts generally has following several:
The one, gate shaft is set, adopt steel gate dash (seeing accompanying drawing 13); Gate shaft is set and belongs to permanent building, technology maturation, shortcoming is, after tunnel puts into operation, gate shaft is set to be had a certain impact to current, can cause certain head loss, cost is relatively high, and, steel gate is put into gate slot and is placed after a period of time, under the impact of seawater, there is the factors such as gate gets rusty, Changhai biology, will sling gate to the later stage time, cause and increase frictional force, stuck phenomenon, cause the difficulty of slinging.
The 2nd, concreting waterwall or adopt the cement mortar waterwall (seeing accompanying drawing 14) of laying bricks in hole, concreting waterwall or adopt the cement mortar technical schemes such as waterwall of laying bricks to belong to temporary measure, after tunnel construction, need to remove, advantage is, after the complete dismounting of tunnel construction, do not leave in principle permanent building, shortcoming is, for the purpose of Demolition Construction safety, must inside and outside tunnel, fill water, in inside and outside hydraulic balance situation, adopt the way of manual demolition under water to remove, concrete wall needs underwater demolition, the feature of underwater operation has determined that Blasting Excavation face can not be very smooth, likely can leave some corners, in addition, manual demolition and spoil removing under water also likely cleared up not bery totally, legacy may affect to the current operation of tunnel.
The 3rd, in hole, heap is built sand hill and is built panel concrete sealing and forms waterwall (seeing accompanying drawing 15).It is longer that the special close measure that tunnel mouth adopts is mainly applicable to the tunnel construction duration, also relatively long situation of get outward/Box-shaped Drainage Culvert of tunnel and get/outfall construction period.In order to save the Engineering Overall duration, get outward/Box-shaped Drainage Culvert of tunnel and tunnel need to be carried out synchronous construction.The special close measure of tunnel mouth is after temporary water retaining cofferdam outside tunnel is removed, and during get/Box-shaped Drainage Culvert foundation trench excavation construction waterborne, and the seawater outside tunnel flows into affect in tunnel and normally in tunnel continues construction and setting.Another usable condition is, get outward/Box-shaped Drainage Culvert of tunnel and get/outfall construction period are longer, exceed 1 year, need to cross over during typhoon period, because temporary water retaining cofferdam design standard is lower, generally, being difficult to resist the wind-induced billow of platform impacts, under typhoon effect, wash away there is temporary water retaining cofferdam part, and seawater is crossed temporary water retaining cofferdam and is overflow into the situation in the tunnel in cofferdam, when serious, wash away there is temporary water retaining cofferdam part, the seawater that tunnel is crossed is filled and is flooded, and bring a large amount of sandstone into, the construction of tunnel is caused and had a strong impact on safety.In this case; improving water-retaining cofferdam design standard is feasible way; but it is more to increase investment; at this moment, adopt special tunnel mouth close measure by sealing hole, like this; even if typhoon washes away temporary water retaining cofferdam part; seawater pours in cofferdam, and the construction of tunnel is not also affected, and plays the effect of protection tunnel construction environment.
Find out from above-mentioned, its object of special close measure that tunnel mouth adopts mainly guarantees that tunnel was not subject to seawater influence outside hole and arranges in construction period, after tunnel construction, the function of close measure has just completed, and the special close measure that tunnel mouth adopts is a kind of disposable interim technical measures substantially.
The shortcoming that the special blocking technology scheme adopting in view of current tunnel mouth exists, now proposes a kind of new structural concept, i.e. easy mounted-dismounted type tunnel mouth baffle device for water.
Utility model content
The purpose of this utility model, be establish in order to overcome the normal gate shaft scheme adopting of current tunnel sealing hole dash or hole that the investment of existence such as waterwall scheme is large, waterwall remove scarfing cinder difficulty, scarfing cinder clean, tunnel moved to current have the shortcomings such as certain influence, a kind of easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system is provided.This device has investment, and province, easy construction, dismounting facilitate, do not stay residue, tunnel operation current are not had to influential feature.
The purpose of this utility model can be by taking following technical scheme to reach:
The easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system, its design feature is: be arranged on massif tunnel mouth place, comprise watertight shutter, T-steel pull bar, jack back seat plate, valve operation pedestrian floor, recharge water pipe and jack, the hole wall of tunnel mouth or body of wall adopt reinforced concrete structure, recharge on the hole wall end face that water pipe is embedded in tunnel mouth, recharge water pipe top and be provided with valve.Jack back seat plate is fixed on the hole wall of tunnel mouth; Watertight shutter is positioned at outside tunnel mouth, is independent concrete structure, and the back side of watertight shutter seals and contacts with tunnel mouth; One end of T-steel pull bar is flexibly connected with the back side of watertight shutter, the other end is flexibly connected with jack back seat plate, forms easy mounted-dismounted type and prevents that watertight shutter from toppling or departing from the tractive structure of tunnel mouth; Contact position at watertight shutter and tunnel mouth is provided with rubber water-proof plate, forms elasticity nature water-stopping structure; Valve operation pedestrian floor is across the inner side at tunnel mouth.
The purpose of this utility model can also be by taking following technical scheme to reach:
Further, in the contact position of watertight shutter and tunnel mouth, rubber water-proof plate can be set, rubber water-proof plate is close to tunnel mouth, and watertight shutter is close to rubber water-proof plate.
Further, watertight shutter can adopt reinforced concrete structure, and its section configuration is " L " shape, plate thickness upper-thin-lower-thick, and plate thickness changing method is that hole inner side is vertical, outside hole inclined-plane, straight tiltedly outer in.
Further, the bottom extension width of watertight shutter can be at 500-700mm.Adopt the L-type watertight shutter of upper-thin-lower-thick to be conducive to the self-support stability of watertight shutter, also meet the up-small and down-big feature of water pressure.
Further, can asphalt separation layer between watertight shutter bottom and base concrete bed course, this pitch separation layer adopts the separation layer of laying two layers of felt paper or smearing the thick asphalt adhesive formation of 2mm.With by watertight shutter concrete and the isolation of base concrete bed course, avoid concrete to be sticked together, increase the follow-up watertight shutter difficulty of slinging.
Further, can establish wearing of two lifting use on the top of watertight shutter and pull rope hole, tying up rope when removing watertight shutter, establish two rectangle preformed grooves of placing T-steel pull bar at the top of watertight shutter, determine according to the position of reinforcing pull rod the position of preformed groove, and the width of preformed groove is a bit larger tham reinforcing pull rod width 30mm.
Further, T-steel pull bar can be formed by i iron or channel-section steel welding production, and T-steel pull bar one end is put in the preformed groove of watertight shutter, the other end catches on jack back seat plate upper end.T-steel pull bar plays by jack back seat plate watertight shutter is held, and avoids watertight shutter in the time of the wave reciprocating of marine site, to occur from the effect that takes off tunnel mouth or outwards topple over.
Further, the inside length size of T-steel pull bar can be a bit larger tham the distance of blocking between watertight shutter top and jack back seat plate upper end, i.e. the loosening gap 10-15mm in stationary point, so that remove.Place after T-steel pull bar, T-steel pull bar can not be generally level, has a bit, and the inclination of T-steel pull bar can digest reserved loosening gap surplus, guarantees that T-steel pull bar is in by the state of watertight shutter and the tension of jack back seat plate.
Further, jack can be placed on the valve operation pedestrian floor between jack back seat plate and watertight shutter, totally two jack.Before jack is sling and removed for watertight shutter, utilize jack back seat plate watertight shutter to be backed down, pushed up loosening, eliminate the bonding force between watertight shutter and rubber water-proof plate, bottom base concrete bed course, facilitate watertight shutter to sling and remove.
Further, watertight shutter can adopt on-the-spot shuttering concreting method construction.
The utlity model has following outstanding beneficial effect:
1, the claimed easy mounted-dismounted type tunnel mouth baffle device for water of the utility model, due to its watertight shutter be positioned at tunnel mouth 1 outside, for independent concrete structure, the back side of watertight shutter seals and contacts with tunnel mouth; One end of T-steel pull bar is flexibly connected with the back side of watertight shutter 2, the other end is flexibly connected with jack back seat plate 4, form easy mounted-dismounted type and prevent that watertight shutter 2 from toppling or departing from the tractive structure of tunnel mouth, therefore, there is dash effective, easy to operate, simple in structure, design and easy construction, that watertight shutter is removed and hung is away convenient, do not stay residue and the beneficial effect such as reduce investment outlay.
2, the utility model adopts monolithic watertight shutter dash, and watertight shutter adopts reinforced concrete structure, and watertight shutter section configuration is L shaped, plate thickness upper-thin-lower-thick, and interior straight tiltedly outer, under horizontal effect of water pressure, watertight shutter is using tunnel mouth structure front side end as support.Adopt seccotine to paste rubber water-proof plate in tunnel mouth front side end, can not adopt steel nail, watertight shutter, under horizontal effect of water pressure, compresses rubber water-proof plate, thereby reaches sealing effect.
3, the utility model is buried underground on structure top, tunnel mouth place and is recharged water pipe (same bore valve is joined at pipe top), establishes valve operation pedestrian floor, as measure and the operating condition of recharge water in hole.On structure top, tunnel mouth place, jack back seat plate is set, as completing in tunnel after recharge water, hang away before watertight shutter, adopt the loosening watertight shutter in jack top, reduce lifting resistance, the measure of convenient lifting, as the two end supports of valve operation pedestrian floor, jack is placed on the valve operation pedestrian floor before jack back seat plate simultaneously.
4, the utility model is established T-steel pull bar, and T-steel pull bar adopts i iron or channel-section steel welding production, for watertight shutter being strained by jack back seat plate, avoids watertight shutter outwards move or topple.
5, the utility model, can be according to the weight of watertight shutter after watertight shutter removes, and secondary utilization is as the wave resistance protection plate of the get/Box-shaped Drainage Culvert outside protection tunnel mouth.
Accompanying drawing explanation
Fig. 1 is the tunnel mouth baffle device for water structure sectional view of the utility model specific embodiment 1.
Fig. 2 is that the A-A of Fig. 1 is to structure sectional view.
Fig. 3 is that the B-B of Fig. 1 is to structure sectional view.
Fig. 4 is that the C-C of Fig. 1 is to structure sectional view.
Fig. 5 is the T-steel bar jointing structure schematic diagram of the utility model specific embodiment 1.
Fig. 6 is the jack placement location schematic diagram of the utility model specific embodiment 1.
Fig. 7 is the tunnel entrance construction schematic diagram that the utility model specific embodiment 1 relates to.
Fig. 8 is the watertight shutter positional structure construction schematic diagram of the utility model specific embodiment 1.
Fig. 9 is the box culvert foundation trench excavation construction schematic diagram of the utility model specific embodiment 1.
Figure 10 is that the watertight shutter of the utility model specific embodiment 1 removes construction schematic diagram.
Figure 11 is the outer box culvert installation schematic diagram of the tunnel mouth of the utility model specific embodiment 1.
Figure 12 is the layout schematic diagram of the tunnel mouth that relates to of the utility model.
Figure 13 is the tunnel mouth water-retaining structure longitudinal sectional view of prior art.
Figure 14 is tunnel concrete/brick wall plugging structure schematic diagram of prior art.
Figure 15 is that the tunnel mouth heap of prior art is built sand hill plugging structure schematic diagram.
The specific embodiment
Specific embodiment 1:
With reference to Fig. 1-Fig. 2, the easy mounted-dismounted type tunnel mouth baffle device for water of the electric power plant circulating water system that the present embodiment relates to, be arranged on massif tunnel mouth 1 place, comprise watertight shutter 2, T-steel pull bar 3, jack back seat plate 4, valve operation pedestrian floor 5, recharge water pipe 6 and jack 8, the hole wall of tunnel mouth 1 or body of wall adopt reinforced concrete structure, recharge on the hole wall end face that water pipe 6 is embedded in tunnel mouth 1, recharge water pipe 6 tops and be provided with valve, jack back seat plate 4 is fixed on the hole wall of tunnel mouth 1; One end of T-steel pull bar 3 is flexibly connected with watertight shutter 2, the other end is flexibly connected with jack back seat plate 4, forms and prevents that watertight shutter 2 from toppling or departing from the tractive structure of tunnel mouth; Be provided with rubber water-proof plate 7 in watertight shutter 2 and the contact position of tunnel mouth 1, form elasticity nature water-stopping structure; Valve operation pedestrian floor 5 is across the inner side at tunnel mouth 1.
In the present embodiment:
With reference to Fig. 1-Fig. 6, in watertight shutter 2 and the contact position of tunnel mouth 1, rubber water-proof plate 7 is set, rubber water-proof plate 7 is close to tunnel mouth 1, and watertight shutter 2 is close to rubber water-proof plate 7.Watertight shutter 2 adopts reinforced concrete structure, and its section configuration is " L " shape, plate thickness upper-thin-lower-thick, and plate thickness changing method is that hole inner side is vertical, outside hole inclined-plane, straight tiltedly outer in.Watertight shutter 2 adopts on-the-spot shuttering concreting method construction.The bottom extension width 600mm of watertight shutter 2.Adopt the L-type watertight shutter of upper-thin-lower-thick to be conducive to the self-support stability of watertight shutter, also meet the up-small and down-big feature of water pressure.Asphalt separation layer 10 between the bottom of watertight shutter 2 and base concrete bed course 12, this pitch separation layer 10 adopts to lay two layers of felt papers formation or smear the thick asphalt adhesive of 2mm and forms, this pitch separation layer 10 is isolated watertight shutter concrete and base concrete bed course 12, avoid concrete to be sticked together, increase the follow-up watertight shutter difficulty of slinging.Establish wearing of two lifting use on the top of watertight shutter 2 and pull rope hole 9, tying up rope when removing watertight shutter 2, establish two rectangle preformed grooves 11 of placing T-steel pull bar at the top of watertight shutter 2, determine according to the position of reinforcing pull rod the position of preformed groove 11, and the width of preformed groove 11 is a bit larger tham reinforcing pull rod width 30mm.
T-steel pull bar 3 is formed by i iron or channel-section steel welding production, and T-steel pull bar 3 one end are put in the preformed groove of watertight shutter 2, the other end catches on jack back seat plate 4 upper ends.T-steel pull bar plays by jack back seat plate watertight shutter is held, and avoids watertight shutter in the time of the wave reciprocating of marine site, to occur from the effect that takes off tunnel mouth or outwards topple over.The inside length size of T-steel pull bar 3 is a bit larger tham the distance of blocking between watertight shutter 2 tops and jack back seat plate 4 upper ends, i.e. the loosening gap 10-15mm in stationary point, so that remove.Place after T-steel pull bar 3, T-steel pull bar 3 can not be generally level, has a bit, and the inclination of T-steel pull bar 3 can digest reserved loosening gap surplus, guarantees the state of T-steel pull bar 3 in watertight shutter and jack back seat plate 4 are strained.
Jack 8 is placed on the valve operation pedestrian floor 5 between jack back seat plate 4 and watertight shutter 2, totally two jack.Before jack 8 is sling and removed for watertight shutter, utilize jack back seat plate 4 watertight shutter 2 to be backed down, pushed up loosening, eliminate the bonding force between watertight shutter 2 and rubber water-proof plate 7, bottom base concrete bed course 12, facilitate watertight shutter 2 to sling and remove.Watertight shutter 2 constructions adopt on-the-spot shuttering concreting method construction.
Referring to Fig. 4-Fig. 6, watertight shutter top establish two Ф 300 lift by crane wearing of use pull rope hole 9, tying up rope when removing watertight shutter 2, two rectangle preformed grooves 11 of placing T-steel pull bar 3 are established at watertight shutter 2 tops, determine according to the position of reinforcing pull rod 3 position of preformed groove 11, preformed groove 11 width are a bit larger tham reinforcing pull rod width 30mm left and right, T-steel pull bar 3 adopts i iron or channel-section steel welding production, T-steel pull bar 3 one end are put in watertight shutter preformed groove 11, jack back seat plate 4 upper ends are caught in one end, T-steel pull bar 3 plays by jack back seat plate 4 watertight shutter 2 is held, avoid watertight shutter 2 in the time of the wave reciprocating of marine site, to occur from the effect that takes off tunnel mouth or outwards topple over.
The inside length size of T-steel pull bar 3 is a bit larger tham the distance of blocking between watertight shutter top and jack back seat plate upper end, i.e. the loosening gap 10-15mm in stationary point, so that remove.Place after T-steel pull bar, T-steel pull bar can not be generally level, has a bit, and the inclination of T-steel pull bar can digest reserved loosening gap surplus, guarantees that T-steel pull bar is in by the state of watertight shutter and the tension of jack back seat plate.
Referring to Fig. 2, Fig. 6, jack 8 is placed on the valve operation pedestrian floor 5 between jack back seat plate 4 and watertight shutter 2, and one on one side, totally two jack 8.Before jack 8 is sling and removed for watertight shutter, utilize jack back seat plate watertight shutter to be backed down, pushed up loosening, eliminate the bonding force between watertight shutter and rubber water-proof plate, bottom base concrete bed course, facilitate watertight shutter to sling and remove.
With reference to Fig. 7-Figure 12, the construction method of the present embodiment, is characterized in that comprising the steps:
1) first at the outer temporary water retaining cofferdam that arranges of tunnel mouth 1, in cofferdam, drain water, carry out excavation of foundation pit, then construct and form steel concrete structure of the window at tunnel mouth place by cast in situs, bury underground and recharge water pipe 6 on the top of tunnel mouth reinforced concrete structure, at the top mouth of pipe that recharges water pipe, valve is set, forms steel concrete jack back seat plate 4 and valve operation pedestrian floor 5 at tunnel wall top site operation;
2) paste rubber water-proof plate 7 in the front side end of tunnel mouth 1, outside rubber water-proof plate, site operation forms watertight shutter bottom concrete foundation bed course, at mat surface asphalt separation layer, described pitch separation layer adopts to lay two layers of felt paper or smear the thick asphalt adhesive of 2mm and forms isolation, or adopts veneer to lay;
3) set up template at concrete foundation bed course place, pouring construction L-type steel concrete watertight shutter;
4) in step 1)-3) described structure construction is complete, reaches after design strength stripping until each concrete structure, after inspecting for acceptance, to recharge the valve closing on water pipe top, make and install the T-steel pull bar 3 at watertight shutter 2 tops, form the tunnel mouth baffle device for water with dash condition.
Further, recharge the valve at water pipe top and select stainless steel material, to avoid because seawater corrosion impact is used, recharge water pipe and adopt coating steel pipe or surface to carry out the common steel tube after preservative treatment; Recharge water pipe and adopt diameter DN250, radical 3-5 root, or according to tunnel length and diameter, irrigation period requires to adjust; The water inlet that recharges the valve at water pipe top is positioned at following 100mm place, average seawater position, in order to avoid cause that valve is inconvenient to operate under water too deeply, or too high also can recharge water while being unfavorable for guaranteeing low water stage.
Further, watertight shutter adopts reinforced concrete structure, section configuration is L shaped, plate thickness upper-thin-lower-thick, in straight outer tiltedly, upper end thickness of slab 400mm left and right, lower end thickness carries out structural calculation according to water pressure size and determines, watertight shutter bottom extension width is in about 600mm, and active force and the existing concrete for hydraulic structure design specifications of watertight shutter arrangement of reinforcement size when considering water pressure size after wave action, lifting carried out calculative determination.Watertight shutter top establish two Φ 300 lift by crane wearing of use pull rope hole, the block water plate structure feature of L-type upper-thin-lower-thick makes block water plate structure center of gravity lower, is conducive to the homeostasis of watertight shutter.Two rectangle preformed grooves of placing T-steel pull bar are established at watertight shutter top.
Further, jack back seat plate, water valve operator andante adopts concrete structure, to resist seawater corrosion.
Further, T-steel pull bar adopts i iron or channel-section steel welding production, and T-steel pull bar length should be become flexible gap surplus 10-15mm in stationary point, so that remove.
Further, when tunnel mouth front side end is buried rubber water-proof plate underground, rubber water-proof plate should be continuous monoblock not there is not the breach of plugging into, in order to avoid leave penetrating passage, rubber water-proof plate thickness 20mm left and right, wide 300-500mm.Rubber water-proof plate should adopt seccotine to be bonded on tunnel mouth front side end concrete, should not adopt iron nail.Because if use iron nail, under effect of water pressure, when watertight shutter presses to rubber water-proof plate, because nail withstands, rubber water-proof plate cannot produce compression squeezed state, thereby can not compress between rubber water-proof plate and watertight shutter, by the existence hidden danger of leaking.After watertight shutter hangs away, rubber water-proof plate can not removed, and directly uses as the waterstop of produce in advance/Box-shaped Drainage Culvert of subsequent installation, and the produce in advance/Box-shaped Drainage Culvert of subsequent installation should withstand on rubber water-proof plate.
The technical program service routine is:
1) after watertight shutter has been constructed, remove temporary water retaining cofferdam, the water inlet of tunnel mouth foundation ditch, effect of water pressure makes watertight shutter be pressed towards tunnel end, watertight shutter leans against on tunnel end, the rubber water-proof plate that tunnel mouth front side end is pasted is not simultaneously compressed and can leak by watertight shutter, watertight shutter plays dash effect, avoid seawater outside hole to enter in tunnel, can not affect in tunnel and continue to construct (in tunnel, constructor and the special temporary construction of mechanical material turnover in the middle of hole or the tunnel length direction of the other end prop up hole turnover).Then adopt dredge boat to carry out getting outside tunnel/Box-shaped Drainage Culvert foundation trench underwater excavation construction (if basement rock first carries out explosion and scraps).Foundation trench width, except satisfied get/Box-shaped Drainage Culvert requires, also should meet the walking operation width requirement of lifting ship waterborne, sees accompanying drawing 13.
2) possess water flowing condition tunnel in-cavity construction is complete, getting outside tunnel/Box-shaped Drainage Culvert foundation trench underwater excavation completes under these two condition performances, opens all valves that recharge water pipe top, allows seawater pour in tunnel by recharging water pipe, until fill.
3) recharge water pipe crown valve door and stay open state, make seawater in tunnel and outside hole keep UNICOM, guarantee that, under the continuous situation of change of tide water level, in hole, outside hole, water level keeps fair substantially, guarantee that watertight shutter both sides do not have pressure differential substantially, so that lifting.Stay specially wearing of establishing to pull rope hole through watertight shutter top on hawser, put on after lifting hawser, remove watertight shutter top T-steel pull bar.
4) two level jack are placed on respectively on the valve operation pedestrian floor between jack back seat plate and watertight shutter, back down watertight shutter by jack, depart from, after making watertight shutter loosening, can unclamp and remove jack.Then use outside follow-up hole get/Box-shaped Drainage Culvert install need lifting ship waterborne or on the bank loop wheel machine watertight shutter is hung away, be placed into outside foundation trench, see accompanying drawing 14.Owing to there is certain frictional force, absorption affinity in watertight shutter and ground, tunnel end close contact, or watertight shutter both sides inside and outside tunnel exist some water pressures poor, cause the watertight shutter difficulty of slinging, adopt jack to back down loosening watertight shutter, can eliminate this influence factor.
5) hanging away after watertight shutter, close the valve that recharges water pipe top, use lifting ship waterborne by getting outside the tunnel of segmentation prefabricating/Box-shaped Drainage Culvert, is marine site direction by tunnel mouth outward, and retrusive is installation waterborne section by section.Get/Box-shaped Drainage Culvert installs, and generally need to carry out jackstone protection, prevents sea beat.Be placed into the general weight of watertight shutter outside foundation trench more than 100 tons; completely can be for wave resistance; can use lifting ship waterborne that watertight shutter is sling and is put into side or the end face wave resistance of get/Box-shaped Drainage Culvert, be used for protecting get/Box-shaped Drainage Culvert, reach the object that watertight shutter secondary utilizes.Jack and valve operation personnel all stand on valve operation pedestrian floor and operate.
Engineering example: be applied to certain large-size thermal power plant recirculated water diversion tunnel hole, seashore, tunnel interior diameter 6.4m, tunnel mouth hole wall concrete thickness 700mm, tunnel mouth is positioned at seashore massif toe, tunnel end face absolute altitude-2.38m, design lowest stage-0.75m, design high-water 2.12m, within 5 years one, meet H1% design wave 3.8m, tunnel is positioned at below design lowest stage throughout the year.Intake is arranged in the marine site of the limit 50.0m that inlands.Water intaking box culvert section is interior circle, and diameter 6.4m is consistent with tunnel internal diameter, guarantees to connect smooth and easy.Zinc-plated 4, the water pipe that recharges of the pre-buried DN250 in tunnel mouth structure top, same bore stainless valve is joined at every water pipe top, recharges water inlet pipe mouth place, water pipe top lower than the following 100mm of construction low water stage.Rubber water-proof thickness of slab 20mm, wide 300mm, rubber water-proof board plane is shaped as circle, is circular consistent with tunnel end.
Jack back seat plate and valve operation pedestrian floor adopt monolithic reinforced concrete structure, and build and be connected together with tunnel structure.
Watertight shutter bottom width 8.20m, height 10.98m, 600mm is stretched out in bottom.Vertical plate thickness of slab 500-800mm, top thickness 500mm, bottom thickness 800mm, joins in length and breadth to double steel bar, and watertight shutter is established the cable hole of wearing of two Φ 300.Watertight shutter weight 160t.
Watertight shutter hangs away the marine lifting program of employing, adopts 500t pontoon to hang and hangs away.
T-steel pull bar adopts I20 i iron welding production.
In the utility model, watertight shutter adopts steel concrete to make, and can be used for briny environment or river fresh water environment.Can complete equally utility model object replacement scheme is, L-type watertight shutter adopts structure steel fabrication, and while adopting structure steel fabrication, cost is higher than steel concrete, should consider to spray anti-seawater corrosion coating when briny environment.
In other embodiment of the present utility model:
Constructure scheme aspect, tunnel length is generally even longer in 1000m left and right, tunnel adopts New Austrian Tunneling Method construction, enter in hole supporting construction, hole the construction links such as temporary lining in (explosion) excavation, hole, reinforced concrete lining layer through hole, or adopt the method constructions such as shield method according to geological conditions, because hole is positioned under water, entrance construction generally all adopts native stone that temporary water retaining cofferdam is set outside hole, water in cofferdam is drained, allowed tunnel mouth construct under anhydrous dry execution conditions.
The general length of get/Box-shaped Drainage Culvert that tunnel mouth is positioned at marine site is outward not long, construction method is generally, prefabricated get/Box-shaped Drainage Culvert of steel concrete and the get/drain structure for water of building on the bank, meanwhile, after tunnel entrance construction is complete, remove water-retaining cofferdam, adopt dredge boat waterborne to excavate foundation trench under water, if ground is rock, first carry out underwater demolition, the scrap rock of foundation trench scope of fried pine, then adopts dredge boat excavation foundation trench.After foundation trench has excavated; adopting over-water construction ship to throw puts basic hardcore bed and paves under water; tamping; then adopt lifting ship that get/Box-shaped Drainage Culvert of prefabricated reinforced concrete on the bank and get/drain structure for water are hauled to foundation trench and laid, then adopt over-water construction ship to throw and put piece stone or get/Box-shaped Drainage Culvert of concrete prefabricated block protection and get/drain structure for water.
In principle, because dash needs, temporary water retaining cofferdam need to be waited until after tunnel all completes and could remove, but in order to save the duration, generally, can not wait until that tunnel engineering all completes, possesses after flow condition, excavate again temporary water retaining cofferdam, tunnel enters full water, then excavates box culvert foundation trench, lays get/Box-shaped Drainage Culvert.But complete in the construction of tunnel mouth structure, tunnel construction certain length, but also do not have under whole performances, adopt special close measure by tunnel sealing hole at tunnel mouth, play the dash effect that substitutes temporary water retaining cofferdam, after preventing from removing cofferdam, seawater enters tunnel, then, when tunnel continues construction, adopt the principle of synchronous parallel construction, get/Box-shaped Drainage Culvert outside synchronous construction tunnel mouth and get/outfall (are removed cofferdam, the operations such as underwater excavation), finally reach getting outside tunnel construction and tunnel/Box-shaped Drainage Culvert synchronous construction, the synchronous target of being completed and coming into operation.
Claims (6)
1. the easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system, it is characterized in that: be arranged on massif tunnel mouth (1) and locate, comprise watertight shutter (2), T-steel pull bar (3), jack back seat plate (4), valve operation pedestrian floor (5), recharge water pipe (6) and jack, the hole wall of tunnel mouth (1) or body of wall adopt reinforced concrete structure, recharge Shang Dongbi, its top that water pipe (6) is embedded in tunnel mouth (1) and be provided with valve, jack back seat plate (4) is fixed on the hole wall of tunnel mouth (1); Watertight shutter (2) is positioned at outside tunnel mouth (1), is independent concrete structure, and the back side of watertight shutter (2) seals and contacts with tunnel mouth (1); One end of T-steel pull bar (3) is flexibly connected with the back side of watertight shutter (2), the other end is flexibly connected with jack back seat plate (4), forms easy mounted-dismounted type and prevents that watertight shutter (2) from toppling or departing from the tractive structure of tunnel mouth; Be provided with rubber water-proof plate (7) in watertight shutter (2) and the contact position of tunnel mouth (1), form elasticity nature water-stopping structure; Valve operation pedestrian floor (5) is across the inner side in tunnel mouth (1).
2. the easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system according to claim 1, it is characterized in that: in watertight shutter (2) and the contact position of tunnel mouth (1), rubber water-proof plate (7) is set, rubber water-proof plate (7) is close to tunnel mouth (1), and watertight shutter (2) is close to rubber water-proof plate (7).
3. the easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system according to claim 1 and 2, it is characterized in that: watertight shutter (2) adopts reinforced concrete structure, its section configuration is " L " shape, plate thickness upper-thin-lower-thick, plate thickness is changed to that hole inner side is vertical, outside hole inclined-plane, has interior straight outer inclined structure; The bottom extension width of watertight shutter (2) is at 500-700mm.
4. the easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system according to claim 1 and 2, it is characterized in that: asphalt separation layer between the bottom of watertight shutter (2) and base concrete bed course, this pitch separation layer adopts to lay (2) layer felt paper formation or smear the thick asphalt adhesive of 2mm and forms; Establish wearing of two lifting use on the top of watertight shutter (2) and pull rope hole, tying up rope when removing watertight shutter, establish two rectangle preformed grooves of placing T-steel pull bar at the top of watertight shutter (2), determine according to the position of reinforcing pull rod the position of preformed groove, and the width of preformed groove is a bit larger tham reinforcing pull rod width 30mm.
5. the easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system according to claim 1 and 2, it is characterized in that: T-steel pull bar (3) is formed by i iron or channel-section steel welding production, T-steel pull bar (3) one end is put in the preformed groove of watertight shutter (2), the other end catches on jack back seat plate (4) upper end.
6. the easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system according to claim 5, it is characterized in that: the inside length size of T-steel pull bar (3) is a bit larger tham the distance of blocking between watertight shutter (2) top and jack back seat plate (4) upper end, be the loosening gap 10-15mm in stationary point, so that remove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320759085.2U CN203613522U (en) | 2013-11-25 | 2013-11-25 | Easily-assembled-and-disassembled tunnel portal water-retaining device for power plant circulating water system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320759085.2U CN203613522U (en) | 2013-11-25 | 2013-11-25 | Easily-assembled-and-disassembled tunnel portal water-retaining device for power plant circulating water system |
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| CN203613522U true CN203613522U (en) | 2014-05-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590379A (en) * | 2013-11-25 | 2014-02-19 | 中国能源建设集团广东省电力设计研究院 | Easily mounting and dismounting type tunnel portal water retaining device of power plant circulating water system and construction method thereof |
| CN106894350A (en) * | 2017-02-13 | 2017-06-27 | 中交隧道工程局有限公司 | A kind of steel basil is buried jacking box culvert device and construction method |
| CN107973494A (en) * | 2017-12-29 | 2018-05-01 | 中国水利水电科学研究院 | A kind of stream entering lake purification of water quality and water resource system for recycling |
-
2013
- 2013-11-25 CN CN201320759085.2U patent/CN203613522U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590379A (en) * | 2013-11-25 | 2014-02-19 | 中国能源建设集团广东省电力设计研究院 | Easily mounting and dismounting type tunnel portal water retaining device of power plant circulating water system and construction method thereof |
| CN103590379B (en) * | 2013-11-25 | 2016-02-03 | 中国能源建设集团广东省电力设计研究院有限公司 | The easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system and construction method thereof |
| CN106894350A (en) * | 2017-02-13 | 2017-06-27 | 中交隧道工程局有限公司 | A kind of steel basil is buried jacking box culvert device and construction method |
| CN107973494A (en) * | 2017-12-29 | 2018-05-01 | 中国水利水电科学研究院 | A kind of stream entering lake purification of water quality and water resource system for recycling |
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Address after: 510670 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee after: Company limited of China Energy Engineering Group Guangdong Electric Power Design Institute Address before: 510670 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee before: Guangdong Electric Power Design Institute of CEEC |
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