CN208039192U - Plugging structure for diversion tunnel based on karst landform - Google Patents

Plugging structure for diversion tunnel based on karst landform Download PDF

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Publication number
CN208039192U
CN208039192U CN201820282133.6U CN201820282133U CN208039192U CN 208039192 U CN208039192 U CN 208039192U CN 201820282133 U CN201820282133 U CN 201820282133U CN 208039192 U CN208039192 U CN 208039192U
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China
Prior art keywords
steel pipe
diversion tunnel
steel
plugging
plug
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CN201820282133.6U
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卢山
龙利秋
高宇
盘新军
黄树鹏
罗雄兵
班辉
叶纯信
蒙飞花
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Datang Xuanwei Hydropower Development Co Ltd
Ceec Guangxi Hydroelectric Construction Bureau
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Datang Xuanwei Hydropower Development Co Ltd
Ceec Guangxi Hydroelectric Construction Bureau
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

Abstract

The utility model provides the plugging structure for diversion tunnel based on karst landform, and the interim plug of first segment, the interim plug of second segment and permanent plug are disposed with along water (flow) direction inside the concrete lining of former diversion tunnel;Water blocking steel-slag sand is installed in the upstream of the interim plug of first segment, Stoplog gate is installed after water blocking steel-slag sand, the Stoplog gate is coordinated by more root posts to be positioned, the concrete-lined bottom of former diversion tunnel is provided with bottom draining steel pipe and top layer drains steel pipe, two layers of draining steel pipe stacked arrangement, the water outlet that steel pipe is drained in top layer is equipped with the first dish valve, and there are two spaced apart second butterfly valve and third butterfly valves for the water outlet installation of the bottom draining steel pipe.By using above-mentioned power station plugging structure for diversion tunnel, it can effectively ensure that and diversion tunnel is blocked, and then ensure that the safety of dam.

Description

Plugging structure for diversion tunnel based on karst landform
Technical field
The utility model belongs to hydraulic engineering technical field of construction more particularly to a kind of diversion tunnel based on karst landform Plugging structure.
Background technology
Ten thousand openning Hydropower Project dam sites are located on the leather Xianghe of the north mainstreams Pan Jiang upstream, are the hydroelectric developments of the northern mainstreams Pan Jiang The 4th grade, project scale is big(2)Type, based on power generation, key construction has:Rolled concrete arch dam, dam crest weir meter Hole, energy dissipating cushion pool, dam body sand surfing mesoporous, diversion system, ground power house and switchyard etc..
1450 m of reservoir operation scheme elevation, dam top elevation 1452.50m, 167.5 m of maximum height of dam, is current Building highest RCC double curvature arch dam, 2.793 × 108m3 of total reservoir storage, installed capacity of power station 180MW(2×90 MW), 7.1 hundred million KW.h of Mean annual energy production.Diversion tunnel is located at left bank, and section configuration is gateway opening shape, and hole diameter is generally 4.5 × 6.0m(It is wide × high), plug section hole 5.5 × 7.2m of diameter maximum(It is wide × high), import floor elevation 1300.10m, outlet bottom plate height Journey 1297.10m, barrel overall length 893.10m.
On 2 9th, 2017 lower locks of inlet of diversion tunnel gate, diversion tunnel barrel country rock seeps water within 11 days 2 months, and 0+080~ 0+120 sections occur that issue, issue is concentrated to be located on RightWall and crown at 3, and water yield raises continuous increasing with reservoir level Add, March 23 maximum stream flow about 14.1m3/ s, mean flow rate about 0.895m/s, hereafter, with the fluctuation of upstream reservoir level, leakage Water is in 13~14.1m3Between/s, the depth of water about 3m in hole, exit water level elevation about 1300m.The water is deep and the current fast in diversion tunnel, applies Work faciostenosis, plug block there are considerable safety construct hidden danger, while face transport of materials, interim guide water, concreting, Many construction difficult problems such as stopper structure stabilization, block extremely difficult.
Utility model content
The big severe situation of security risk protrusion, short time limit, difficulty of construction is blocked in face of diversion tunnel, is analysing in depth water conservancy diversion In hole monolithic stability problem, hole after flow velocity changing rule, formulate with the original in " based on being blocked in hole, outside hole supplemented by antiseepage " Then, the closure scheme for adding permanent plug using interim plug is determined, by using above-mentioned power station plugging structure for diversion tunnel, energy Enough effective guarantees block diversion tunnel, and then ensure that the safety of dam.
In order to realize above-mentioned technical characteristic, what the purpose of this utility model was realized in:Based on karst landform Plugging structure for diversion tunnel, inside the concrete lining of former diversion tunnel be disposed with first segment along water (flow) direction blocks up temporarily Head, the interim plug of second segment and permanent plug;Water blocking steel-slag sand is installed in the upstream of the interim plug of first segment, in water blocking steel lock Stoplog gate is installed, the Stoplog gate is coordinated by more root posts to be positioned, at the concrete-lined bottom of former diversion tunnel after door Portion is provided with bottom draining steel pipe and top layer draining steel pipe, and two layers of draining steel pipe stacked arrangement drains the water outlet of steel pipe in top layer Mouth is equipped with the first dish valve, and there are two spaced apart second butterfly valve and third butterflies for the water outlet installation of the bottom draining steel pipe Valve.
The walkway of the original diversion tunnel being internally provided with for required equipment, transport of materials in hole, people's row Channel includes the full hall steel pipe support set up from from hole to the interim plug of first segment, and the full hall steel pipe support includes for big The left width transport channel of type transported in hand truck fashion steel pipe, shaped steel;Intermediate channel for walk;For arranging air duct and pump The right width channel of pipe.
The water blocking steel-slag sand includes door-plate column, and the door-plate column uses channel steel, the door-plate column to pass through more Uniformly distributed joint bar is fixed in concrete lining, and being slidably installed on door-plate column has steel plate door, the steel plate door its It is middle to be welded with diagonal ribs on one side, tripod is welded at the top of steel plate door, the top of the tripod passes through suspension hook and traction Device is connected, and controls the decentralization of steel plate door.
The draft gear includes haulage cable, and the haulage cable bypasses fixed pulley, and the fixed pulley is mounted on The centre position of top cross-bar, the top cross-bar are fixedly mounted on concrete-lined top, and the haulage cable passes through Wire rope casing, and the end of haulage cable is fixed on by anchor tip positioning on concrete-lined side wall.
Scaffold work platform is provided on the concrete-lined side wall, the scaffold work platform shares three Layer, first layer platform are used as draining steel pipe platform for lining, and flat surface is higher by the water surface at least 0.5m, and the second layer is used as concrete warehousing Platform, flat surface are higher by first layer flat surface at least 1.5m, and third layer is as reinforcing platform.
It is provided with evacuated mould at the top of bottom draining steel pipe and top layer draining steel pipe inside the interim plug of second segment Plate, positioned at top layer draining steel pipe end, bottom position is provided with reserved grouting cavity.
The reserved grouting cavity position is provided with more immersible pumps, and the draining pump line of the immersible pump extends to forever The position of long plug, the reserved grouting cavity position are communicated with drainpipe, are arranged at the both ends of drainpipe position There is bulk cement sack cofferdam.
The Stoplog gate divides upstream and downstream two parts, two parts respectively to be stacked with more shaped steel, and shaped steel seam takes full weld.
The permanent plug uses permanent grout curtain plug.
The utility model has the advantages that:
1, ten thousand interim plug construction risks of openning power station diversion tunnel are very big, in conjunction with ten thousand openning power station diversion tunnels Shape geology, hydrologic condition feature study interim plug arrangement and method for construction, in maximum stream flow about 14.1m3/ s, mean flow rate is about In the case of 0.895m/s, the depth of water about 3m, have studied water blocking steel-slag sand cooperation butterfly valve close, shaped steel Stoplog gate as safety guarantee again The interim plug arrangement and method for construction for also serving as sealing and template and underwater concreting ensure that interim plug blocks successfully, for forever It is good that long plug construction creates dry ground condition plugging effect.
2, characteristic of the utility model based on karst landform has studied and defined the such topography and geomorphology power station water conservancy diversion of adaptation Hole plugging structure ensure that the safety of construction, and good technological guidance is provided for follow-up such diversion tunnel closure.
3, above-mentioned diversion tunnel plugging construction method, construction cost is low, short construction period, and safe.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the utility model plugging structure overall structure diagram.
Fig. 2 is the interim plug vertical view of the utility model first segment.
Fig. 3 is the interim plug front view of the utility model first segment.
Fig. 4 is B-B views in the utility model Fig. 3.
State diagram when Fig. 5 is water blocking below the utility model water blocking steel-slag sand.
Fig. 6 is A partial enlarged views in the utility model Fig. 2.
Fig. 7 is the utility model anchor tip part installation diagram.
Fig. 8 is the utility model Stoplog gate structural schematic diagram.
In figure:Water blocking steel-slag sand 1, fixed pulley 2, top cross-bar 3, Stoplog gate 4, wire rope casing 5, haulage cable 6, One section of interim plug 7, anchor tip 8, the interim plug 9 of second segment, permanent plug 10, draining pump line 11, column 12, top layer draining Steel pipe 13, bottom draining steel pipe 14, concrete lining 15, cavity template 16, the first dish valve 17, second butterfly valve 18, cavity 19, the Three butterfly valves 20, reserved grouting immersible pump 21, bulk cement sack cofferdam 22, drainpipe 23;
Door-plate column 101, joint bar 102, steel plate door 103, diagonal ribs 104, tripod 105, suspension hook 106.
Specific implementation mode
The embodiment of the utility model is described further below in conjunction with the accompanying drawings.
Embodiment 1:
Referring to Fig. 1-8, the plugging structure for diversion tunnel based on karst landform, inside the concrete lining 15 of former diversion tunnel It is disposed with the interim plug 7 of first segment, the interim plug 9 of second segment and permanent plug 10 along water (flow) direction;Face in first segment When plug 7 upstream water blocking steel-slag sand 1 is installed, Stoplog gate 4 is installed after water blocking steel-slag sand 1, the Stoplog gate 4 passes through The cooperation positioning of more root posts 12 is provided with bottom draining steel pipe 14 and top layer row in the bottom of the concrete lining 15 of former diversion tunnel Water steel pipe 13, two layers of draining steel pipe stacked arrangement, the water outlet that steel pipe 13 is drained in top layer are equipped with the first dish valve 17, the bottom There are two spaced apart second butterfly valve 18 and third butterfly valves 20 for the water outlet installation of layer draining steel pipe 14.By using above-mentioned Plugging structure for diversion tunnel can fast block diversion tunnel.
Further, the walkway of the former diversion tunnel being internally provided with for required equipment, transport of materials in hole, The walkway includes the full hall steel pipe support set up from from hole to the interim plug of first segment 7, the full hall steel pipe support It include the left width transport channel for large-scale transported in hand truck fashion steel pipe, shaped steel;Intermediate channel for walk;For arranging The right width channel of air duct and pump line.Working efficiency can be improved by above-mentioned walkway.
Further, the water blocking steel-slag sand 1 includes door-plate column 101, and the door-plate column 101 uses channel steel, described Door-plate column 101 is fixed on by more uniformly distributed joint bars 102 in concrete lining 15, is slidably matched on door-plate column 101 Steel plate door 103 is installed, the steel plate door 103 is wherein welded with diagonal ribs 104 on one side, is welded at the top of steel plate door 103 There is tripod 105, the top of the tripod 105 is connected by suspension hook 106 with draft gear, and is controlled under steel plate door 103 It puts.It drains tube valve to need before closing, puts down water blocking steel-slag sand 1, reduce in bottom draining steel pipe 14 and top layer draining steel pipe 13 Flow solves underwater 12 butterfly valves difficulty closing problem.
Further, the draft gear includes haulage cable 6, and the haulage cable 6 bypasses fixed pulley 2, described Fixed pulley 2 is mounted on the centre position of top cross-bar 3, and the top cross-bar 3 is fixedly mounted on the top of concrete lining 15, institute It states haulage cable 6 and passes through wire rope casing 5, and the end of haulage cable 6 is fixed on coagulation by the positioning of anchor tip 8 On the side wall of native lining cutting 15.Stoplog gate water retarding standard is calculated by gear 70m heads, and temporary water dash peak level 1370m meets low water Phase flood control requires, and setting is being led 0+384.5 at, demarcates for diversion tunnel lining cutting Duan Yuwei lining cutting sections at this, concrete lining protrusion At " bank ", 5 32 steel of work are vertically installed at " bank " as column, lateral 32 shaped steel of stitch welding work, forms closed " work steel before column Wall ".Security context is created for the installation of draining steel pipe manufacturing and concrete construction.
Further, scaffold work platform, the scaffold work are provided on the side wall of the concrete lining 15 Platform shares three layers, and first layer platform is used as draining steel pipe platform for lining, and flat surface is higher by the water surface at least 0.5m, and the second layer is used as Concrete warehousing platform, flat surface are higher by first layer flat surface at least 1.5m, and third layer is as reinforcing platform.
Further, the top of the bottom draining steel pipe 14 inside the interim plug of the second segment 9 and top layer draining steel pipe 13 Portion is provided with cavity template 16, and top layer draining 13 end bottom position of steel pipe is provided with reserved grouting cavity 19.
Further, reserved 19 position of grouting cavity is provided with more immersible pumps 21, the immersible pump 21 Draining pump line 11 extends to the position of permanent plug 10, and reserved 19 position of grouting cavity is communicated with drainpipe 23, 23 position of drainpipe is provided at both ends with bulk cement sack cofferdam 22.It ensure that right by the way that reserved grouting cavity 19 is arranged The interim plug 7 of first segment carries out in work progress, and the percolating water of part can directly collect in reserved grouting cavity 19, Er Qietong Percolating water can be discharged by crossing the draining pump line 11 of the immersible pump 21.
Further, the Stoplog gate 4 divides upstream and downstream two parts, two parts respectively to be stacked with more shaped steel, and shaped steel seam is taken Full weld.Producing efficiency is improved by using upstream and downstream two parts, is accelerated construction progress.The purpose of installation Stoplog gate is for draining Steel pipe manufacturing is installed and security context is created in concrete construction.
Further, the permanent plug 10 uses permanent grout curtain plug.It is filled by using above-mentioned permanent curtain Diversion tunnel can be carried out thoroughly permanent closure by starching plug, and then realize the closure to diversion tunnel, ensure that the peace of dam Quan Xing.
Embodiment 2:
Plugging structure for diversion tunnel based on karst landform described in any one, it includes the following steps:
Step1 builds construction channel and scaffold work platform:Quickly to reach working face, construction road considers The factors such as equipment and materials transport, pipeline laying and safe escape channel determine, full hall steel pipe is set up from from hole to interim plug Holder, left width are completely laid with steel form as transport channel;Right width completely spreads bamboo pedal, and the wall paper that keeps to the side sets air duct, pump line;In Between be used as walkway;Three layers of scaffold construction platform are set up, first layer platform is used as draining steel pipe platform for lining, and the second layer is used Make concrete warehousing platform, third layer is as reinforcing platform;
Step2 installs water blocking steel-slag sand:Two door-plate columns 101 are installed at the hole of diversion tunnel first, as steel plate door 103 guide rail, then fixed pulley 2 is installed, 5 insulation blocking of wire rope casing of haulage cable 6, wire rope casing 5 passes through first The interim plug 7 of section, right side abutment wall is fixed in downstream by anchor tip 8, then catches on steel plate door 103 by haulage cable 6 and push up The tripod 105 in portion;
Step3 installs Stoplog gate, first installs portal frame, and cucurbit, 3 root post 12 of centre and laterally pad are hung on crossbeam The welding of cast steel is integral, and with cucurbit, hand fit is in place, shaped steel is limited away from Stoplog gate is welded at a certain distance from the water surface, in spacing-type It is assembled that Stoplog gate is carried out above steel, Stoplog gate divides the making of upstream and downstream two parts, and shaped steel seam takes full weld, after draining steel pipe is in place, Trip first part Stoplog gate is first put with cucurbit, so that Stoplog gate is close to shaped steel at the top of drainpipe under hydraulic thrust and human assistance Column, reinforcement of weld, then downstream side second part Stoplog gate is put, two parts welding is integral, and last residue vacancy is folded with shaped steel To the top of hole;
Step4, fabrication and installation bottom drains steel pipe 14 and top layer drains steel pipe 13, and using full framing, standpipe is according to row Water steel pipe spacing is accurately positioned, and vertical point three layers, framed bent pipe is welded with both sides abutment wall joint bar, steel form is paved with, as drainpipe Platform for lining, then assembled draining steel pipe are welded into entirety with shaped steel, are integrally risen with cucurbit after four draining steel pipe assembly It hangs, it is in place that four draining steel pipes are integrally entered water;
Step5 pours the concrete of the interim plug of first segment 7, base surface is handled first, at electric hammer artificial chiseling Reason, then sealing and template installation, upstream end make cofferdam using Stoplog gate, are spaced between drainpipe and two sides first use film bag to be in the milk It blocks, then uses geotextiles and cotton-wool stuff up a crack;Downstream Side Template uses combined steel formwork, and installation is spaced between drainpipe before template Film bag is piled up bagged cement and is made downstream cofferdam with cotton-wool stuff up a crack with geotextiles bedding;On the peripheries Dong Bi pre-buried rockfill grouting and Joint grouting pipeline, rockfill grouting pipe are evenly arranged along crown contour line;Base surface, sealing and template, pre-embedment grouting pipe inspection After examination, concreting is carried out, and then that completes the interim plug of first segment 7 pours closure;
Step6 closes the first dish valve 17, second butterfly valve 18 and third butterfly valve 20, drains steel pipe 14 to bottom and top layer is arranged Water steel pipe 13 is closed;
Step7 pours the concrete of the interim plug of second segment 9, closes drainpipe butterfly valve, after carrying out water plugged by grouting processing, Take ejectment measure;The small cofferdam of twice is done in storehouse, more than upstream cofferdam catchment cavity, and shaped steel steel is installed in the cavity that catchments Frame makes pipe canopy, lays end template, drainpipe 23 is installed in storehouse, the cavity percolating water that catchments is discharged in immersible pump 21;Concrete is used again Concreting without longitudinal joint is poured from downstream toward upstream, using a grading fine-expansion pumping concreting;Concrete strength is met the requirements Afterwards, top is first carried out with grouting, surface grouting processing is filled out, and drainpipe gate is then shut off, to cavity rockfill grouting processing of catchmenting;
Step8, the construction of 10 plug of permanent plug have dry work condition, permanent plug after the completion of interim plug construction Concrete works are carried out by following process:Basement rock surface treatment, reinforcing bar system peace, template installation, installation of embedded parts, cooling water pipe paving If, concreting, maintenance, form that irrigation gallery, consolidation grout curtain, backfill gallery concrete, water flowing be cooling, seam fills Slurry, concrete use a grading fine-expansion pumping concreting.
The above embodiments are only the optimal technical scheme of the utility model, and are not construed as the limit for the utility model System, the technical solution that the scope of protection of the utility model should be recorded with claim include the technical solution of claim record The equivalents of middle technical characteristic are protection domain.Equivalent replacement i.e. within this range is improved, also in the utility model Protection domain within.

Claims (9)

1. the plugging structure for diversion tunnel based on karst landform, it is characterised in that:In the concrete lining of former diversion tunnel(15)It is interior Portion is disposed with the interim plug of first segment along water (flow) direction(7), the interim plug of second segment(9)With permanent plug(10);? The interim plug of first segment(7)Upstream water blocking steel-slag sand is installed(1), in water blocking steel-slag sand(1)Stoplog gate is installed later (4), the Stoplog gate(4)Pass through more root posts(12)Cooperation positioning, in the concrete lining of former diversion tunnel(15)Bottom set It is equipped with bottom draining steel pipe(14)Steel pipe is drained with top layer(13), two layers of draining steel pipe stacked arrangement, in top layer draining steel pipe (13)Water outlet the first dish valve is installed(17), the bottom draining steel pipe(14)Water outlet installation there are two arranged for interval Second butterfly valve(18)And third butterfly valve(20).
2. the plugging structure for diversion tunnel based on karst landform according to claim 1, it is characterised in that:The original diversion tunnel The walkway being internally provided with for required equipment, transport of materials in hole, the walkway includes from hole to first The interim plug of section(7)The full hall steel pipe support that place is set up, the full hall steel pipe support include for large-scale transported in hand truck fashion steel pipe, The left width transport channel of shaped steel;Intermediate channel for walk;Right width channel for arranging air duct and pump line.
3. the plugging structure for diversion tunnel based on karst landform according to claim 1, it is characterised in that:The water blocking steel lock Door(1)Including door-plate column(101), the door-plate column(101)Using channel steel, the door-plate column(101)By more The joint bar of cloth(102)It is fixed on concrete lining(15)On, in door-plate column(101)On be slidably installed and have steel plate door (103), the steel plate door(103)Be wherein welded with diagonal ribs on one side(104), in steel plate door(103)Top be welded with three Tripod(105), the tripod(105)Top pass through suspension hook(106)It is connected with draft gear, and controls steel plate door(103) Decentralization.
4. the plugging structure for diversion tunnel based on karst landform according to claim 3, it is characterised in that:The draft gear Including haulage cable(6), the haulage cable(6)Around fixed pulley(2), the fixed pulley(2)Mounted on top cross-bar (3)Centre position, the top cross-bar(3)It is fixedly mounted on concrete lining(15)Top, the haulage cable(6) Across wire rope casing(5), and by haulage cable(6)End pass through anchor tip(8)Positioning is fixed on concrete lining (15)Side wall on.
5. the plugging structure for diversion tunnel based on karst landform according to claim 1, it is characterised in that:The concrete lining It builds(15)Side wall on be provided with scaffold work platform, the scaffold work platform shares three layers, and first layer platform is used as Steel pipe platform for lining is drained, flat surface is higher by the water surface at least 0.5m, and the second layer is used as concrete warehousing platform, and flat surface is higher by the One layer of flat surface at least 1.5m, third layer is as reinforcing platform.
6. the plugging structure for diversion tunnel based on karst landform according to claim 1, it is characterised in that:The second segment faces When plug(9)Internal bottom drains steel pipe(14)Steel pipe is drained with top layer(13)Top be provided with cavity template(16), position Steel pipe is drained in top layer(13)End bottom position is provided with reserved grouting cavity(19).
7. the plugging structure for diversion tunnel based on karst landform according to claim 6, it is characterised in that:The reserved grouting Cavity(19)Position is provided with more immersible pumps(21), the immersible pump(21)Draining pump line(11)It extends to permanent stifled Head(10)Position, the reserved grouting cavity(19)Position is communicated with drainpipe(23), in drainpipe(23)Institute is in place That sets is provided at both ends with bulk cement sack cofferdam(22).
8. the plugging structure for diversion tunnel based on karst landform according to claim 1, it is characterised in that:The Stoplog gate (4)Upstream and downstream two parts, two parts are divided respectively to be stacked with more shaped steel, shaped steel seam takes full weld.
9. the plugging structure for diversion tunnel based on karst landform according to claim 1, it is characterised in that:The permanent plug (10)Using permanent grout curtain plug.
CN201820282133.6U 2018-02-28 2018-02-28 Plugging structure for diversion tunnel based on karst landform Active CN208039192U (en)

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Application Number Priority Date Filing Date Title
CN201820282133.6U CN208039192U (en) 2018-02-28 2018-02-28 Plugging structure for diversion tunnel based on karst landform

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Application Number Priority Date Filing Date Title
CN201820282133.6U CN208039192U (en) 2018-02-28 2018-02-28 Plugging structure for diversion tunnel based on karst landform

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Publication Number Publication Date
CN208039192U true CN208039192U (en) 2018-11-02

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