CN107605511A - Cavern's plug peripheral water stopping structure and its construction method - Google Patents
Cavern's plug peripheral water stopping structure and its construction method Download PDFInfo
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- CN107605511A CN107605511A CN201710771161.4A CN201710771161A CN107605511A CN 107605511 A CN107605511 A CN 107605511A CN 201710771161 A CN201710771161 A CN 201710771161A CN 107605511 A CN107605511 A CN 107605511A
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Abstract
The invention discloses a kind of cavern's plug peripheral water stopping structure and its construction method, including the sealing ridge, dowel, sealing piece and sealing ridge teeth groove, sealing ridge teeth groove is along the one week shallow teeth groove dug in hole in former lining cutting, the sealing ridge is to be cast in the circle concrete in the sealing ridge teeth groove dug in advance and in plug, a plurality of dowel is inserted in the sealing ridge, between former lining cutting and periphery basement rock, ensure the sealing ridge, former lining cutting and the globality of periphery basement rock, in the embedment sealing ridge of sealing piece one end, in other end embedment bulkhead concrete, there is the former lined internal reinforcing bar without cutting processing in the sealing ridge.Sealing ridge teeth groove is dug in cavern's original lining cutting, expansion sealing strip is pasted at insertion dowel in groove, teeth groove middle part, and vertical touch pours the sealing ridge, and a part for sealing piece is embedded on the outside of the sealing ridge, the sealing ridge forms a continuous water sealing structure of circle on concrete lining surface after the completion of pouring；Casting concrete plug, and by another part embedment plug of sealing piece, the seepage prevention system of closing is ultimately formed, whole cavern's closure is completed.The present invention is practical, reliability is high.
Description
Technical field
The present invention relates to Construction for Hydroelectric Project, is a kind of cavern's plug peripheral water stopping structure and its construction specifically
Method.
Background technology
During Hydraulic and Hydro-Power Engineering is built, diversion tunnel, temporary diversion bottom outlet are generally set and meet applying for construction requirement
Work branch hole and access tunnel, after each cavern completes water conservancy diversion or traffic task, built for connection upstream and downstream or the above-mentioned of water passage
Thing is built, is typically blocked using concrete plug.The execution conditions of plug are poor, the duration is nervous, and are used as permanent building, often
Often bear high water head, it is difficult to overhaul, therefore, plug needs well-designed and construction, to ensure that its is safe and reliable to operation.
One of the main reason for being plug accident or fail along concrete plug circumference leak, plug circumference water seal design is
One of key technology of plug design.Plug circumference sealing in plug upstream side and downstream by setting 1~2 circular purple
Copper water stop or rubber water-proof piece are realized.Generally, plug periphery need to shift to an earlier date when plug is constructed as being basement rock around in basement rock
Fluting casting concrete teeth groove and embedded water stop.As being concrete lining, a kind of way is dismounting before plug construction on plug periphery
The original supporting construction of plug section, excavates teeth groove on country rock, and progress concrete teeth groove pours pre-buried with sealing piece；Another way
It is that just sealing piece is embedded in liner structure in Construction of Tunnel Liner, and carries out the protection of sealing exposed junction.
The closure plug of sealing, plug plugging construction are not buried for the existing concrete lining structure of plug section and in advance
It is preceding, it is necessary to carry out concrete lining dismounting, basement rock fluting, concrete teeth groove pour the process such as pre-buried with sealing, not only construct
Difficulty is larger, and the duration is longer, and Demolition Construction can destroy the resistance to overturning of original liner structure and country rock to a certain extent,
It is unfavorable to the stability of plug.
Sealing is embedded in advance in lining construction, diversion tunnel longer for the runtime and larger flood, containing sand
Under conditions of high-velocity flow, easily diversion tunnel lining cutting and sealing piece are damaged；For working tunnel or access tunnel, construction machine
Tool passes through for a long time, it is difficult to ensure that embedded water stop is not damaged before closure.
The content of the invention
The technical problems to be solved by the invention are to block engineering for the tunnel or bottom outlet of the existing liner structure in block section
Above mentioned problem present in current designs, there is provided a kind of practical and high cavern's plug peripheral water stopping structure of reliability and its
Construction method, it can both avoid slotting in concrete lining and basement rock, nor affect on the normal operation of tunnel or bottom outlet, moreover it is possible to
Enough ensure the antiseepage quality of plug.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of cavern's plug peripheral water stopping structure,
Including the sealing ridge, dowel, sealing piece and sealing ridge teeth groove, sealing ridge teeth groove is along the shallow of hole cutting in one week in former lining cutting
Teeth groove, the sealing ridge are to be cast in the circle concrete in the sealing ridge teeth groove dug in advance and in plug, and a plurality of dowel is inserted in
Between the sealing ridge, former lining cutting and periphery basement rock, ensure the globality of the sealing ridge, former lining cutting and periphery basement rock, sealing piece one end is buried
Enter in the sealing ridge, in other end embedment bulkhead concrete, there is the former lined internal reinforcing bar without cutting processing in the sealing ridge.
Between the sealing ridge and former lining cutting contact surface a circle expansion sealing strip is embedded with along hole within one week.
Inlay anchorage length that depth according to dowel leak outside of the sealing ridge in plug determines that width is according to dowel
Diameter, an array pitch determine.
The sealing ridge is slightly expanded concrete or common concrete material.
The construction method of above-mentioned cavern's plug peripheral water stopping structure, comprises the following steps：
(1) sealing ridge teeth groove is dug on cavern original lining cutting plug sealing position, lining cutting exposed surface carries out dabbing processing, only
Water ridge teeth groove original lined internal reinforcing bar is handled without cutting, and sealing ridge teeth groove is dug to the inboard depthkeeping of former lined internal reinforcing bar
Degree；
(2) insertion dowel is into periphery basement rock in the teeth groove of the sealing ridge, dowel leakage certain length, and then formwork erection pours only
The water ridge, and sealing piece one end is embedded on the outside of the sealing ridge, the sealing ridge forms a circle on concrete lining surface after the completion of pouring
Continuous water sealing structure；
(3) casting concrete plug, by one end embedment for exposing sealing piece wherein, whole cavern is blocked.
6th, the construction method of cavern's plug peripheral water stopping structure according to claim 5, it is characterised in that the step
(2) to insert dowel, dowel leakage certain length in the teeth groove of the sealing ridge, and expansion sealing strip is pasted in the middle part of teeth groove, then
Vertical touch pours the sealing ridge, and sealing piece one end is embedded on the outside of the sealing ridge, the sealing ridge pour after the completion of in concrete lining table
Face forms a continuous water sealing structure of circle.
The beneficial effects of the invention are as follows：Not only solve basement rock or it is concrete-lined cut difficulty, avoid to basement rock
Or concrete-lined destruction, offered convenience to construction, ensure the construction period, also effectively prevent embedded water stop to cavern or bottom
The influence of hole normal operation.It is practical, reliability is high, solve well present in current plug peripheral water stopping sheet sets
Problem.
Brief description of the drawings
Fig. 1 is the schematic perspective view of plug peripheral water stopping structure in cavern's of the present invention.
Fig. 2 is Figure 1A-A sectional views.
Fig. 3 is B drawings in Fig. 2.
Fig. 4 is schematic diagram of the embodiment of the present invention.
In figure, the 1 sealing ridge, 2 former lining cutting, 3 country rocks, 4 plugs, 5 sealing pieces, 6 expansion sealing strips, 7 former lined internal reinforcing bars,
8 dowels, 9 sealing ridge teeth groove.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
As Figure 1-3, cavern's plug peripheral water stopping structure of the invention, including the sealing ridge 1, dowel 8, the and of sealing piece 5
Sealing ridge teeth groove 9, sealing ridge teeth groove 9 are that the sealing ridge 1 is to be cast in along the one week shallow teeth groove dug in hole in former lining cutting 2
A circle concrete in the sealing ridge teeth groove 9 dug in advance and in plug 4, a plurality of dowel 8 be inserted in the sealing ridge 1, former lining cutting 2 and
Between periphery basement rock 3, ensure the globality of the sealing ridge, former lining cutting and periphery basement rock, the one end of sealing piece 5 is embedded in the sealing ridge 1, separately
In one end embedment concrete of plug 4, there is the former lined internal reinforcing bar 7 without cutting processing in the sealing ridge 1.
Between the sealing ridge 1 and the contact surface of former lining cutting 2 a circle expansion sealing strip 6 is embedded with along hole within one week.
Inlay anchorage length that depth according to dowel 8 leak outside of the sealing ridge 1 in plug 4 determines that width is according to anchor
The diameter of muscle, an array pitch determine.
The sealing ridge 1 is slightly expanded concrete or common concrete material.
The construction method of above-mentioned cavern's plug peripheral water stopping structure, it is characterised in that comprise the following steps：
(1) sealing ridge teeth groove is dug on cavern original lining cutting plug sealing position, lining cutting exposed surface carries out dabbing processing, only
Water ridge teeth groove original lined internal reinforcing bar is handled without cutting, and sealing ridge teeth groove is dug to the inboard depthkeeping of former lined internal reinforcing bar
Degree；
(2) insertion dowel is into periphery basement rock in the teeth groove of the sealing ridge, dowel leakage certain length, and then formwork erection pours only
The water ridge, and sealing piece one end is embedded on the outside of the sealing ridge, the sealing ridge forms a circle on concrete lining surface after the completion of pouring
Continuous water sealing structure；
(3) casting concrete plug, by one end embedment for exposing sealing piece wherein, whole cavern is blocked.
The step (2) is pasted to insert dowel, dowel leakage certain length in the teeth groove of the sealing ridge in the middle part of teeth groove
Expansion sealing strip, then vertical touch pours the sealing ridge, and sealing piece one end is embedded on the outside of the sealing ridge, after the completion of the sealing ridge pours
A continuous water sealing structure of circle is formed on concrete lining surface.Specifically, sealing ridge teeth groove 9 is dug in former lining cutting
Shallow teeth groove, it is to ensure that sealing ridge teeth groove energy down enters former lining cutting certain depth that it, which is acted on, makes the globality on the sealing ridge and original lining cutting
Preferably.Gullet depth determines according to former lined internal steel bar arrangement position, it is ensured that the sealing ridge is effectively engaged integral with lining cutting.
The sealing ridge 1 is the concrete structure poured in the teeth groove dug in advance, and slightly expanded concrete optionally can be selected
Or the material such as normal concrete, its effect is fixed sealing piece outboard end.Depth is inlayed according to dowel in plug in the sealing ridge
The anchorage length of leakage determines that width is according to the diameter of dowel, an array pitch determination.
Dowel 8 is the reinforcing bar for connecting the sealing ridge, former liner structure and periphery basement rock, and it is the guarantee sealing ridge that it, which is acted on, original
The globality of liner structure and periphery basement rock.
In the outboard end of the sealing piece 5 embedment sealing ridge, in medial extremity embedment bulkhead concrete, sealing effect is played.
Expansion sealing strip 6 is optionally buried, and the purpose is to further improve the sealing performance of structure.
During concrete plug plugging construction, the inboard depthkeeping of reinforcing bar 7 on the outside of former lining cutting is dug at plug sealing position first
Degree, the processing of lining cutting exposed surface dabbing, the inside lining of sealing ridge teeth groove 9 inside reinforcing bar are handled without cutting；Secondly, in sealing ridge tooth
Dowel 8, dowel leakage certain length are inserted in groove 9, and expansion sealing strip 6 is pasted in the middle part of teeth groove；Then stand to touch and pour sealing
The ridge 1, and a part of sealing piece is embedded on the outside of the sealing ridge, concrete lining surface forms a circle and connected after the completion of the sealing ridge 1 pours
Continuous water sealing structure；Casting concrete plug, and another part of sealing piece is pre-buried wherein, and finally, the sealing ridge 1 passes through lining cutting
Internal reinforcing bar effect is engaged with former lining cutting 2 to be integrated, and the sealing ridge 1 is fixed as one with former lining cutting 2, the three of country rock 3 by dowel 8
Body, water-stagnating effect is reached by sealing piece between the sealing ridge and plug, ultimately form the seepage prevention system of closing.
The present invention is suitable for the diversion tunnel of the existing liner structure in block section, working tunnel, friendship Hydraulic and Hydro-Power Engineering
The dash plug of logical hole and dam body temporary diversion hole closure.
For example, Construction of river diversion tunnel water conservancy diversion on certain downstream power station, using gateway opening type, reinforced concrete lining layer,
Flow section is 9.0m × 11.0m, and plug uses column gravity type, long 40.0m.Stopped using the present invention plug upstream and downstream side
Water-bound, the sealing ridge use C30 slightly expanded concretes, away from plug upstream and downstream identity distance from about 1.0m, dig into reinforcing bar in lining cutting first
Inboard 10cm, then pour the sealing ridge and form entirety with former lining cutting, rockfill grouting is carried out by built-in pipe after the completion of pouring and connect
Grouting is touched, BW expansion sealing strip sealings are pasted between lining cutting and the sealing ridge, are stopped between the sealing ridge and plug using copper sheet
Water, its structure are shown in Fig. 4.
Embodiment described above is merely to illustrate the technological thought and feature of the present invention, in the art its object is to make
Technical staff it will be appreciated that present disclosure and implementing according to this, it is impossible to the patent model of the present invention is only limited with the present embodiment
Enclose, i.e., the equal change or modification that all disclosed spirit is made, still fall in the scope of the claims of the present invention.
Claims (6)
1. a kind of cavern's plug peripheral water stopping structure, it is characterised in that including the sealing ridge (1), dowel (8), sealing piece (5) and stop
Water ridge teeth groove (9), sealing ridge teeth groove (9) are that the sealing ridge (1) is along the one week shallow teeth groove dug in hole in former lining cutting (2)
The circle concrete in the sealing ridge teeth groove (9) dug in advance and in plug (4) is cast in, a plurality of dowel (8) is inserted in sealing
Between the ridge (1), former lining cutting (2) and periphery basement rock (3), ensure the globality of the sealing ridge, former lining cutting and periphery basement rock, sealing piece
(5) in one end embedment sealing ridge (1), in other end embedment plug (4) concrete, have in the sealing ridge (1) without at cutting
The former lined internal reinforcing bar (7) of reason.
2. cavern's plug peripheral water stopping structure according to claim 1, it is characterised in that in the sealing ridge (1) and former lining cutting (2)
Between contact surface a circle expansion sealing strip (6) is embedded with one week along hole.
3. cavern's plug peripheral water stopping structure according to claim 1, it is characterised in that the sealing ridge (1) is in plug (4)
Interior to inlay the anchorage length that depth leaks outside according to dowel (8) and determine, width determines according to the diameter of dowel, an array pitch.
4. cavern's plug peripheral water stopping structure according to claim 1, it is characterised in that the sealing ridge (1) is microdilatancy
Concrete or common concrete material.
5. the construction method of cavern's plug peripheral water stopping structure as described in claim any one of 1-4, it is characterised in that including with
Lower step：
(1) sealing ridge teeth groove is dug on cavern original lining cutting plug sealing position, lining cutting exposed surface carries out dabbing processing, the sealing ridge
Teeth groove original lined internal reinforcing bar is handled without cutting, and sealing ridge teeth groove is dug and arrives former lined internal reinforcing bar inboard certain depth；
(2) insertion dowel is into periphery basement rock in the teeth groove of the sealing ridge, dowel leakage certain length, and then formwork erection pours sealing
The ridge, and sealing piece one end is embedded on the outside of the sealing ridge, the sealing ridge forms a circle on concrete lining surface after the completion of pouring and connected
Continuous water sealing structure；
(3) casting concrete plug, by one end embedment for exposing sealing piece wherein, whole cavern is blocked.
6. the construction method of cavern's plug peripheral water stopping structure according to claim 5, it is characterised in that the step (2)
To insert dowel, dowel leakage certain length in the teeth groove of the sealing ridge, and expansion sealing strip is pasted in the middle part of teeth groove, then stand and touch
Pour the sealing ridge, and sealing piece one end be embedded on the outside of the sealing ridge, the sealing ridge pour after the completion of in concrete lining surface shape
Into a continuous water sealing structure of circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710771161.4A CN107605511A (en) | 2017-08-31 | 2017-08-31 | Cavern's plug peripheral water stopping structure and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710771161.4A CN107605511A (en) | 2017-08-31 | 2017-08-31 | Cavern's plug peripheral water stopping structure and its construction method |
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| CN107605511A true CN107605511A (en) | 2018-01-19 |
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| CN201710771161.4A Pending CN107605511A (en) | 2017-08-31 | 2017-08-31 | Cavern's plug peripheral water stopping structure and its construction method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952810A (en) * | 2018-08-06 | 2018-12-07 | 中国电建集团华东勘测设计研究院有限公司 | A kind of tunnel blocks stopper structure construction method and tunnel and tunnel blocks plug |
| CN109440744A (en) * | 2018-12-24 | 2019-03-08 | 中国三峡建设管理有限公司 | A kind of fast and safely self-stabilization type diversion tunnel temporary plugging structures and methods |
| CN110513112A (en) * | 2019-09-04 | 2019-11-29 | 中国电建集团中南勘测设计研究院有限公司 | A kind of flowing hole forms device and shaft construction method |
| CN111236183A (en) * | 2020-03-25 | 2020-06-05 | 中国电建集团贵阳勘测设计研究院有限公司 | Gallery inlet plugging body structure and construction method |
| CN112049032A (en) * | 2020-07-27 | 2020-12-08 | 成龙建设集团有限公司 | Method for reinforcing municipal highway door opening |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108952810A (en) * | 2018-08-06 | 2018-12-07 | 中国电建集团华东勘测设计研究院有限公司 | A kind of tunnel blocks stopper structure construction method and tunnel and tunnel blocks plug |
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| CN111236183A (en) * | 2020-03-25 | 2020-06-05 | 中国电建集团贵阳勘测设计研究院有限公司 | Gallery inlet plugging body structure and construction method |
| CN112049032A (en) * | 2020-07-27 | 2020-12-08 | 成龙建设集团有限公司 | Method for reinforcing municipal highway door opening |
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