CN107574792A - Contain high water head plugging structure and its construction method in a kind of dam foundation water delivery bottom - Google Patents
Contain high water head plugging structure and its construction method in a kind of dam foundation water delivery bottom Download PDFInfo
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- CN107574792A CN107574792A CN201710533349.5A CN201710533349A CN107574792A CN 107574792 A CN107574792 A CN 107574792A CN 201710533349 A CN201710533349 A CN 201710533349A CN 107574792 A CN107574792 A CN 107574792A
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Abstract
The invention discloses a kind of dam foundation water delivery bottom to contain high water head plugging structure and its construction method, including, earth and rockfill dam, the upstream valve for being arranged on the water delivery bottom culvert of earth and rockfill dam bottom and being arranged at water delivery bottom culvert end positions, valve downstream, the upstream corresponding position of the earth and rockfill dam drills to contain with water delivery bottom from top to bottom and connected, and Grouting Pipe is set, internal cast slightly expanded concrete is contained to water delivery bottom by Grouting Pipe, the downstream corresponding position of the earth and rockfill dam drills to contain with water delivery bottom from top to bottom and connected, and Grouting Pipe is set, internal cast slightly expanded concrete is contained to water delivery bottom by Grouting Pipe, the axis opening position of the earth and rockfill dam opens up the antiseepage wall chase contained through water delivery bottom from top to bottom；Beneficial effects of the present invention：Based on being blocked using plastic concrete cut-off wall, in the steel pipe of block section upstream and downstream side top grouting reduce the integrated biological pond system supplemented by internal water pressure, plugging effect is good, is effectively guaranteed the smooth safe construction of closure.
Description
Technical field
The present invention relates to dam foundation blocking technology field, and in particular to a kind of dam foundation water delivery bottom contain high water head plugging structure and its
Construction method.
Background technology
Earth and rockfill dam buried penstock under dam seepage is to be built in the reservoir and pond on a hill common problem of 50 ~ seventies of 20th century, modern
Carried out over year in the medium and small reservoirs of reinforcement, pond on a hill earth and rockfill dam, buried penstock under dam leakage problems are very prominent.
The method that the pipe laying that seepage potential safety hazard to earth and rockfill dam at present be present block processing mainly has dam crest grouting, mixed
Coagulate stifled grave, the closure of clay set well, upside-down well blocks and the technologies such as concrete cut blocks.Each closure Program Technical Analysis
It is compared as follows：1）Dam crest grouting technique can be used for the contact leakage problem for handling most of earth and rockfill dams, but be difficult to handle under culvert pipe
The seepage of portion's dam foundation contact band, is not suitable for the situation that culvert pipe buried depth is big, culvert pipe width is bigger；2）Concrete blocking technology one
As combine consolidation grouting and implement, by the circumferentially disposed grout hole in culvert pipe, carry out the surface grouting between tube wall and dam body, still
Do not applied to for having been subjected to the pipe culvert after inner sleeve steel pipe is handled；3）Clay set well blocking technology is reliably constructed depth capacity at present
About 30m；4）The maximum processing depth of upside-down well blocking technology reaches 40m, and working procedure is cumbersome, and the duration is longer, and will be in nothing
Constructed under conditions of seepage flow；5）Concrete cut blocking technology applicability is wide, closure reliable in quality, but easily causes dam crest
Differential settlement.
Contain for earth and rockfill dam water delivery bottom and block these problems run into Practical Project, it is necessary to a kind of construction peace of exploitation
It is complete reliable, plugging effect is good, dam crest without sedimentation the methods of, the technology is using based on concrete cut closure, above and below block section
The comprehensive treatment technique supplemented by pregrouting reduction internal water pressure in the steel pipe of side is swum, and using slurry pouch, in advance guidance wall, special note
The measures such as pipe setting are starched to ensure plugging effect and efficiency of construction.
The content of the invention
For problems of the prior art, the invention provides one kind that a kind of plugging effect is good, efficiency of construction is high
Contain high water head plugging structure and its construction method in dam foundation water delivery bottom.
Technical scheme is as follows：
High water head plugging structure is contained at a kind of dam foundation water delivery bottom, including, earth and rockfill dam, it is arranged on the water delivery bottom culvert of earth and rockfill dam bottom and sets
Put upstream valve, the valve downstream at water delivery bottom culvert end positions, it is characterised in that the upstream relevant position of the earth and rockfill dam
Place's drilling from top to bottom is contained with water delivery bottom to be connected, and sets Grouting Pipe, contains internal cast microdilatancy to water delivery bottom by Grouting Pipe
Concrete, form upstream steel pipe block section；The downstream corresponding position of the earth and rockfill dam, which drills to contain with water delivery bottom from top to bottom, to be connected
It is logical, and Grouting Pipe is set, internal cast slightly expanded concrete is contained to water delivery bottom by Grouting Pipe, forms downstream steel pipe block section；
The axis opening position of the earth and rockfill dam opens up the antiseepage wall chase contained through water delivery bottom from top to bottom, and to pouring inside antiseepage wall chase
Concrete is molded, the cut-pff wall groove top portion both sides set pre- guidance wall, pre- to guide wall top portion fixed setting precast lining.
Contain high water head plugging structure in a kind of described dam foundation water delivery bottom, it is characterised in that the Grouting Pipe bottom thread connects
Connect and two-way casting head is set, the two-way casting head is arranged in the culvert of water delivery bottom, and two-way casting head both ends are set with steel wire rope colligation
Slurry pouch is put, pouch expansion end structure in formation bottom in the culvert of water delivery bottom is starched after pouring slightly expanded concrete.
Contain high water head plugging structure in a kind of described dam foundation water delivery bottom, it is characterised in that the pre- guidance wall is that inverted L shape is pre-
Reinforced concrete structure processed, top uniformly set screw rod, set screw hole on the precast lining, the pre- guidance wall with it is pre-
Cushion block processed is coordinated by screw rod with screw hole to be fixed together.
Contain high water head plugging structure in a kind of described dam foundation water delivery bottom, it is characterised in that the pre- guidance wall centre position
Reserved groove is set, is provided with and shores between pre- guidance wall, shore both ends branch and be located in the prefabricated reserved groove for leading wall.
Contain high water head plugging structure in a kind of described dam foundation water delivery bottom, it is characterised in that set and put on the precast lining
Groove is put, and shelving in groove between precast lining is provided with prefabricated crossbeam.
A kind of described dam foundation water delivery bottom contain high water head plugging structure, it is characterised in that it is described shore one end set it is adjustable
Formula jacking, shore two-end part and install swellable tape.
Contain the construction method of high water head plugging structure in a kind of described dam foundation water delivery bottom, it is characterised in that including following step
Suddenly：
1）Construct upstream steel pipe block section：Determine that water delivery bottom is contained using drill hole of drilling machine in Earth and Rockfill Dam apical axis line upstream specified location
Position；The culvert of water delivery bottom is punched after the completion of boring positioning, and carries out borehole cleaning；Bottom is connected to the Grouting Pipe of two-way casting head after borehole cleaning
It is placed into water delivery bottom contains, by Grouting Pipe toward slightly expanded concrete is irrigated in two-way casting head, makes its filling full entirely by capsule
Stop slip casting after bag, rotation Grouting Pipe makes it be separated with two-way casting head, contain to water delivery bottom in irrigate slightly expanded concrete until
Reach design slip casting requirement and stop slip casting；
2）Construct downstream steel pipe block section：After reaching some strength after upstream steel pipe block section, valve downstream discharge water delivery is opened
Contain block section downstream ponding in bottom；In same step 1）Earth and Rockfill Dam apical axis line downstream specified location is contained to water delivery bottom and blocked；
3）Construction of guide wall：After treating the construction of upstream and downstream steel pipe block section, antiseepage wall chase is excavated in advance at earth and rockfill dam axis position,
Wall will be guided in advance is arranged on cut-pff wall groove top portion both sides, then pressure sets precast lining respectively at its top, and fixed by screw rod, according to
Antiseepage wall chase trenching construction alternately installs successively to be shored and prefabricated crossbeam；
4）Impervious wall construction：After antiseepage wall chase grooving, cut cut-pff wall bottom water delivery bottom and contain and run through, then to cut-pff wall
Groove pours modeling concrete until being poured at pre- guidance wall top portion absolute altitude；
5）Armored concrete bears down on one construction：After antiseepage wall chase intensity reaches requirement, precast lining and prefabricated crossbeam, colligation are removed
Reinforcing bar and casting concrete form armored concrete and beared down on one.
Beneficial effects of the present invention：
（1）Based on being blocked using plastic concrete cut-off wall, in the steel pipe of block section upstream and downstream side top grouting reduce internal water pressure and be
Auxiliary integrated biological pond system, plugging effect is good, is effectively guaranteed the smooth safe construction of closure；
（2）By bellend by the setting of pouch special tectonic, while slurries have obtained operative constraint, it ensure that upstream and downstream is sealed
The plugging effect of stifled section；
（3）Lead wall and use full precast construction, effectively raise efficiency of construction, cushion block after-pouring concrete is removed after the completion of construction
Coping structure, the differential settlement of dam crest is prevented.
Brief description of the drawings
Fig. 1 is closure process cross-sectional view of the present invention；
Fig. 2 is that cross-sectional view is completed in present invention closure；
Fig. 3 is Grouting Pipe of the present invention and two-way Grouting Pipe attachment structure schematic diagram；
Fig. 4 is the two-way Grouting Pipe colligation slurry bag structure schematic diagram of the present invention；
Fig. 5 is grouting structural representation in present invention slurry pouch；
Fig. 6 is Grouting Pipe of the present invention and two-way Grouting Pipe isolating construction schematic diagram；
Fig. 7 is Grouting Pipe of the present invention grouting figure again；
Fig. 8 is notch arrangement schematic diagram at the top of cut-pff wall of the present invention；
Fig. 9 is retractable supports structural representation of the present invention；
Figure 10 is pre- guidance wall construction schematic diagram of the invention；
Figure 11 is precast lining structural representation of the present invention；
In figure：1- earth and rockfill dams, 2- water deliverys bottom are contained, 3- upstream valves, 4- valve downstreams, 5- upstreams steel pipe block section, 6- downstreams steel
Pipe block section, 7- guide wall in advance, 8- prefabricated crossbeams, 9- precast linings, the two-way casting heads of 10-, 11- slurry pouches, 12- Grouting Pipes,
13- steel wire ropes, 14- slightly expanded concretes, 15- screw holes, 16- shelve groove, and 17- reserves groove, 18- screw rods, 19- cut-pff walls
Groove, 20- modeling concrete, 21- shore, and 22- armored concrete bears down on one, the adjustable jackings of 23-, 24- swellable tapes.
Embodiment
To be described in further detail with reference to Figure of description and by embodiment to the present invention, following examples are
Explanation of the invention is not limited to following examples.
As shown in figs. 1-11, a kind of dam foundation water delivery bottom culvert high water head plugging structure and its construction method, including earth and rockfill dam 1,
Contain 2, upstream valve 3, valve downstream 4, upstream steel pipe block section 5, downstream steel pipe block section 6, pre- guidance wall 7, prefabricated in water delivery bottom
Crossbeam 8, precast lining 9, two-way casting head 10, slurry pouch 11, Grouting Pipe 12, steel wire rope 13, slightly expanded concrete 14, screw hole
15th, shelve groove 16, reserved groove 17, screw rod 18, antiseepage wall chase 19, modeling concrete 20, shore 21, armored concrete bear down on one 22,
Adjustable jacking 23 and swellable tape 24.The bottom of earth and rockfill dam 1 is provided with water delivery bottom and contains 2, and it is pipe of concrete inner lining steel that water delivery bottom, which contains 2,
Tubular construction, both ends set upstream valve 3 and valve downstream 4；The upstream corresponding position of earth and rockfill dam 1 drills from top to bottom and water delivery
2 connections are contained at bottom, and set Grouting Pipe 12, are contained by Grouting Pipe 12 to water delivery bottom and slightly expanded concrete 14 is poured into a mould inside 2, in composition
Swim steel pipe block section 5；The downstream corresponding position of earth and rockfill dam 1 drills from top to bottom to be connected with water delivery bottom culvert 2, and sets Grouting Pipe
12, contained by Grouting Pipe 12 to water delivery bottom and slightly expanded concrete 14 is poured into a mould inside 2, form downstream steel pipe block section 6；Grouting Pipe 12
Bottom thread connection sets two-way casting head 10, and two-way casting head 10 is arranged on water delivery bottom and contained in 2, and the two-way both ends of casting head 10 are used
The colligation of steel wire rope 13 sets slurry pouch 11, and slurry pouch 11 expands in the interior bottoms that formed of water delivery bottom culvert 2 after pouring slightly expanded concrete 14
Big end structure；The axis opening position of earth and rockfill dam 1 open up from top to bottom contain through water delivery bottom 2 antiseepage wall chase 19, and to antiseepage
Injection concrete 20 is poured inside wall chase 19, the top both sides of antiseepage wall chase 19 set pre- guidance wall 7, guide the fixation of the top of wall 7 in advance and set
Put precast lining 9；Pre- guidance wall 7 is inverted L shape prefabricated reinforced concrete structure, and top uniformly sets screw rod 18, precast lining 9
Upper setting screw hole 15, the pre- wall 7 that guides are fixed together with precast lining 9 by screw rod 18 and the cooperation of screw hole 15, pre- guidance
The centre position of wall 7 sets reserved groove 17, is provided between pre- guidance wall 7 and shores 21, shored 21 one end and set adjustable jacking 23,
Shore 21 two-end parts and install swellable tape 24, and prop up to be located in the prefabricated reserved groove 17 for leading wall 7 and also set on precast lining 9
Put and shelve groove 16, and shelving in groove 16 between precast lining 9 is provided with prefabricated crossbeam 8, and precast lining 9 is supported.
Work progress is as follows：
Step 1: upstream steel pipe block section is constructed：Determined in the dam crest axis upstream specified location of earth and rockfill dam 1 using drill hole of drilling machine defeated
2 positions are contained at the bottom, and water delivery bottom is punched after the completion of boring positioning and contains 2, places the Grouting Pipe 12 for being banded with slurry pouch 11 after borehole cleaning
Contain to water delivery bottom in 2, it is to be filled full entirely by pouch 11 by Grouting Pipe 12 toward perfusion slightly expanded concrete 14 in slurry pouch 11
After stop slip casting, rotation Grouting Pipe 12 makes it be separated with two-way casting head 10, contains to water delivery bottom and slightly expanded concrete 14 is irrigated in 2
Until reaching design slip casting requirement stops slip casting；
Step 2: downstream steel pipe block section is constructed：After reaching some strength after upstream steel pipe block section 5, the row of valve downstream 4 is opened
Go out water delivery bottom and contain 2 block section downstream ponding, then water delivery bottom is contained in the dam crest axis downstream specified location of earth and rockfill dam 1 and sealed
Stifled, Specific construction mode is referring to step 1.
Step 3: construction of guide wall：After treating the construction of upstream and downstream steel pipe block section, opened in advance at the axis position of earth and rockfill dam 1
Antiseepage wall chase 19 is dug, wall 7 will be guided in advance and be arranged on cut-pff wall groove top portion both sides, then pressure sets precast lining 9 respectively at its top, and lead to
Cross screw rod 18 to fix, once alternately installed according to the trenching construction of antiseepage wall chase 19 and shore 21 and prefabricated crossbeam 8；
Step 4: impervious wall construction：After the grooving of antiseepage wall chase 19, cut cut-pff wall bottom water delivery bottom and contain 2 and run through, then
Modeling concrete 20 is poured to antiseepage wall chase 19 until being poured at the pre- guidance elevation of top of wall 7；
Step 5: concrete bears down on one：After the intensity of antiseepage wall chase 19 reaches requirement, precast lining 9 and prefabricated crossbeam 8 are removed, is tied up
Wire-tie and casting concrete forms armored concrete and bears down on one 22.
The structure and method are applied to earth and rockfill dam bottom and set water delivery bottom to contain closure engineering, the high water head that is particularly suitable for use in, contain
Pipe buried depth is big, enters the special engineerings such as people's condition containing steel lining, nothing.Based on being blocked using concrete cut, block section upstream and downstream side
Pregrouting reduces the comprehensive treatment technique supplemented by internal water pressure in steel pipe, and using slurry pouch, in advance guidance wall, special Grouting Pipe
The measure such as set to ensure.
Claims (7)
1. high water head plugging structure is contained at a kind of dam foundation water delivery bottom, including, earth and rockfill dam（1）, be arranged on earth and rockfill dam（1）The water delivery of bottom
Contain at bottom（2）And it is arranged on the culvert of water delivery bottom（2）Upstream valve at end positions（3）, valve downstream（4）, it is characterised in that it is described
Earth and rockfill dam（1）Upstream corresponding position drill from top to bottom and water delivery bottom contain（2）Connection, and Grouting Pipe is set（12）, pass through
Grouting Pipe（12）Contain to water delivery bottom（2）Inside cast slightly expanded concrete（14）, form upstream steel pipe block section（5）；The soil
Masonry dam（1）Downstream corresponding position drill from top to bottom and water delivery bottom contain（2）Connection, and Grouting Pipe is set（12）, pass through note
Slurry pipe（12）Contain to water delivery bottom（2）Inside cast slightly expanded concrete（14）, form downstream steel pipe block section（6）；The native stone
Dam（1）Axis opening position open up from top to bottom through water delivery bottom contain（2）Antiseepage wall chase（19）, and to antiseepage wall chase（19）
Pour injection concrete in inside（20）, the antiseepage wall chase（19）Top both sides set pre- guidance wall（7）, wall is guided in advance（7）Top
Precast lining is fixedly installed（9）.
2. high water head plugging structure is contained at a kind of dam foundation water delivery bottom according to claim 1, it is characterised in that the Grouting Pipe
（12）Bottom thread connection sets two-way casting head（10）, the two-way casting head（10）It is arranged on the culvert of water delivery bottom（2）It is interior, it is two-way
Casting head（10）Both ends steel wire rope（13）Colligation sets slurry pouch（11）, pour slightly expanded concrete（14）After starch pouch（11）
Contain at water delivery bottom（2）Interior formation bottom expands end structure.
3. high water head plugging structure is contained at a kind of dam foundation water delivery bottom according to claim 1, it is characterised in that the pre- guidance
Wall（7）For inverted L shape prefabricated reinforced concrete structure, top uniformly sets screw rod（18）, the precast lining（9）Upper setting spiral shell
Rod aperture（15）, the pre- guidance wall（7）With precast lining（9）Pass through screw rod（18）With screw hole（15）Cooperation is fixed together.
4. high water head plugging structure is contained at a kind of dam foundation water delivery bottom according to claim 1 or 3, it is characterised in that described pre-
Guide wall（7）Centre position sets reserved groove（17）, wall is guided in advance（7）Between be provided with shore（21）, shore（21）Both ends branch
It is located at pre- guidance wall（7）Reserved groove（17）It is interior.
5. high water head plugging structure is contained at a kind of dam foundation water delivery bottom according to claim 1, it is characterised in that the preformed pad
Block（9）Groove is shelved in upper setting（16）, and precast lining（9）Between shelve groove（16）It is interior to be provided with prefabricated crossbeam（8）.
6. high water head plugging structure is contained at a kind of dam foundation water delivery bottom according to claim 4, it is characterised in that described to shore
（21）One end sets adjustable jacking（23）, shore（21）Two-end part installs swellable tape（24）.
7. containing the construction method of high water head plugging structure according to a kind of any described dam foundation water delivery bottoms of claim 1-6, it is special
Sign is, comprises the following steps：
1）Construct upstream steel pipe block section：In earth and rockfill dam（1）Dam crest axis upstream specified location determines water delivery using drill hole of drilling machine
Contain at bottom（2）Position；The culvert of water delivery bottom is punched after the completion of boring positioning（2）, and carry out borehole cleaning；Bottom is connected to two-way slip casting after borehole cleaning
Head（10）Grouting Pipe（12）It is placed into the culvert of water delivery bottom（2）It is interior, pass through Grouting Pipe（12）Toward two-way casting head（10）Interior perfusion is micro-
Expansive concrete（14）, make its filling full entirely by pouch（11）After stop slip casting, rotate Grouting Pipe（12）Make itself and two-way note
Starch head（10）Separation, contain to water delivery bottom（2）Interior perfusion slightly expanded concrete（14）Until reaching design slip casting requirement stops slip casting；
2）Construct downstream steel pipe block section：Treat upstream steel pipe block section（5）After reaching some strength, valve downstream is opened（4）Row
Go out the culvert of water delivery bottom（2）Block section downstream ponding；In same step 1）To earth and rockfill dam（1）Dam crest axis downstream specified location is to water delivery bottom
Contain（2）Blocked；
3）Construction of guide wall：After treating the construction of upstream and downstream steel pipe block section, in earth and rockfill dam（1）Cut-pff wall is excavated in advance in axis position
Groove（19）, wall will be guided in advance（7）Installed in cut-pff wall groove top portion both sides, then pressure sets precast lining respectively at its top（9）, and pass through
Screw rod（18）It is fixed, according to antiseepage wall chase（19）Trenching construction alternately installs successively to be shored（21）And prefabricated crossbeam（8）；
4）Impervious wall construction：Antiseepage wall chase（19）After grooving, the culvert of cut-pff wall bottom water delivery bottom is cut（2）And run through, then
To antiseepage wall chase（19）Pour modeling concrete（20）Until being poured into pre- guidance wall（7）At elevation of top；
5）Armored concrete bears down on one construction：Treat antiseepage wall chase（19）After intensity reaches requirement, precast lining is removed（9）And prefabricated horizontal stroke
Beam（8）, simultaneously casting concrete formation armored concrete bears down on one for assembling reinforcement（22）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710533349.5A CN107574792A (en) | 2017-07-03 | 2017-07-03 | Contain high water head plugging structure and its construction method in a kind of dam foundation water delivery bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710533349.5A CN107574792A (en) | 2017-07-03 | 2017-07-03 | Contain high water head plugging structure and its construction method in a kind of dam foundation water delivery bottom |
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| Publication Number | Publication Date |
|---|---|
| CN107574792A true CN107574792A (en) | 2018-01-12 |
Family
ID=61049510
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710533349.5A Withdrawn CN107574792A (en) | 2017-07-03 | 2017-07-03 | Contain high water head plugging structure and its construction method in a kind of dam foundation water delivery bottom |
Country Status (1)
| Country | Link |
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| CN (1) | CN107574792A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547286A (en) * | 2018-06-12 | 2018-09-18 | 中国水利水电第五工程局有限公司 | A kind of prefabricated guide groove structure of concrete cut and guide groove installation method |
| CN111664912A (en) * | 2020-05-29 | 2020-09-15 | 交通运输部天津水运工程科学研究所 | System and method for monitoring broken stone amount in stone throwing pipe of underwater leveling machine |
-
2017
- 2017-07-03 CN CN201710533349.5A patent/CN107574792A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547286A (en) * | 2018-06-12 | 2018-09-18 | 中国水利水电第五工程局有限公司 | A kind of prefabricated guide groove structure of concrete cut and guide groove installation method |
| CN111664912A (en) * | 2020-05-29 | 2020-09-15 | 交通运输部天津水运工程科学研究所 | System and method for monitoring broken stone amount in stone throwing pipe of underwater leveling machine |
| CN111664912B (en) * | 2020-05-29 | 2022-03-25 | 交通运输部天津水运工程科学研究所 | System and method for monitoring broken stone amount in stone throwing pipe of underwater leveling machine |
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Application publication date: 20180112 |
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