CN107034848A - A kind of water storage concrete dam construction stitches the construction method of flexible leak stoppage - Google Patents
A kind of water storage concrete dam construction stitches the construction method of flexible leak stoppage Download PDFInfo
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- CN107034848A CN107034848A CN201710326302.1A CN201710326302A CN107034848A CN 107034848 A CN107034848 A CN 107034848A CN 201710326302 A CN201710326302 A CN 201710326302A CN 107034848 A CN107034848 A CN 107034848A
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- water
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- water storage
- concrete dam
- flexible
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
Abstract
A kind of water storage concrete dam construction stitches the construction method of flexible leak stoppage, and this method comprises the following steps：Step 1：Stop water is positioned；Step 2：Block water hole drilling；Step 3：Film bag is installed；Step 4：Plaster material is irrigated, film bag packed layer is formed；Step 5：Chemical grouting hole drilling；Step 6：Flexible blockage material is irrigated, until whole construction joint is tamped to form construction joint packed layer by the reactant of polyurethane and water, that is, the flexible leak stoppage of water storage concrete dam construction seam is completed.A kind of water storage concrete dam construction that the present invention is provided stitches the construction method of flexible leak stoppage, can solve basis and the problem of differential settlement causes concrete construction joint leak occurs, reduce engineering risk, it is ensured that safety in production.
Description
Technical field
The present invention relates to the loss zone construction field of concrete construction joint, especially a kind of water storage concrete dam construction
Stitch the construction method of flexible leak stoppage.
Background technology
With carrying forward vigorously for national hydraulic engineering, China has built numerous concrete dams and water channel.Due to numerous
The reason for, concrete dam and water channel drainage happen occasionally, and not only influence normal production, and seriously threaten dam and water
The safe operation of canal.
Many cloth power stations are Tibet Autonomous Region " 12 " energy development Planning emphasis projects, be the comprehensive regulation of the Buddhist nun Yanghe River with
Protect main projects.Engineering hinge is by right bank geomembrane anti-seepage sand-gravel dam, left bank sluice, power plant building, left secondary dam etc.
Building is constituted.3079.0 meters of many cloth power stations crest elevation, power station normal pool level（October 1 to Second Year May then
31 days）For 3076.0 meters, level of dead water is 3074.0 meters, flood season（Annual June 1 was to September 30 days）Operating water level is 3074.0 meters.
Power station belongs to the medium-sized engineering such as III, and key construction is 3 grades, and secondary structure is 4 grades, and temporay building is 5 grades.Project Areas earthquake
Basic intensity is VII degree, and seismic fortification intensity is also VII degree.Dam Site is with Late Yanshanian-Himalayan monzonitic granite（γ
35-6）It is with the 4th（Q）Based on stratum, the exposure of left bank upstream has Upper Permian（P2）.
Dam Site riverbed and left bank terrace are coating, and 52.6~190 meters of the deep cladding thickness in riverbed area is overall in left bank
The thick thin feature of right bank, basement rock top plate is with 40 degree or so the gradients from right bank oblique cutting to left bank.Left bank tableland cover layer thickness variation model
251.2 ~ 359.3 meters are enclosed, average thickness is 300.5 meters.Basement rock top plate elevation excursion is 2730.9 ~ 2830.2 meters, by a left side
Bank slightly has the trend of uprising to right bank, and bedrock surface is rough and uneven in surface, and two deeper chases occurs in position in the tableland of left bank, thus it is speculated that be Furukawa
Road.Left bank overburden cover, more than 350 meters, is huge thick-covering.Dam foundation is vibro-replacement stone column, rotary digging filling concrete
Stake, rotary churning pile, graded broken stone is filled between stake.After dam is built up for 2015, there is differential settlement, concrete construction joint in basis
Open, leak, the normal production of influence occur.
The content of the invention
The technical problems to be solved by the invention are to provide the construction that a kind of water storage concrete dam construction stitches flexible leak stoppage
Method, can solve basis and the problem of differential settlement causes concrete construction joint leak occur, reduce engineering risk, really
Safety in production is protected.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of water storage concrete dam construction seam
The construction method of flexible leak stoppage, this method comprises the following steps：
Step 1：Stop water is positioned：Appropriate position is chosen at the two ends for the water storage concrete dam construction seam for having ftractureed or having misplaced
A stop water hole position is respectively determined, and positioning is marked；
Step 2：Block water hole drilling：Junction of the edges of two sheets of paper drilling is carried out in the stop water hole position that step 1 is selected, stop water is formed；
Step 3：Film bag is installed：The film bag installed in the stop water that step 2 is drilled, the length of film bag is not less than the height of stop water
Degree；
Step 4：Irrigate plaster material：The filling plaster material into step 3 mounted film bag is until the full whole film bag of filling, shape
Film forming bag packed layer；
Step 5：Chemical grouting hole drilling：Water storage concrete dam construction between two stop waters of step 4 formation is sewed on,
Suitable position is selected, junction of the edges of two sheets of paper drilling is carried out, chemical grouting hole is formed；
Step 6：Irrigate flexible blockage material：Flexible blockage material is irrigated in the chemical grouting hole being drilled to step 5, to returning slurry,
Shield slurry a period of time again, until whole construction joint is tamped to form construction joint packed layer by the reactant of polyurethane and water, that is, complete
The flexible leak stoppage of water storage concrete dam construction seam.
In step 1, setting stop water, stop water are required in construction joint upstream and downstream two ends appropriate location or according to design document
Must junction of the edges of two sheets of paper drilling.
In step 3, the bag that film bag is made for geotextiles, with high, the corrosion-resistant, good water permeability of strength, easy construction etc.
Feature.
The plaster material irrigated in step 4 mixes by cement, water and flocculant and is made, cement, water and flocculant
Mass ratio is 0.5-0.7:1:0.01-0.02.
In step 5, the position in chemical grouting hole is arranged between two stop waters, is advisable with easy construction.
The flexible blockage material irrigated in step 6 is oiliness polyurethane and aqueous polyurethane.
The method for filling of step 6 is：First perfusion oiliness polyurethane is until have the outflow of oiliness polyurethane, the aqueous poly- ammonia of Reperfu- sion
Ester, until whole construction joint is tamped to form construction joint packed layer by the reactant of polyurethane and water.
A kind of water storage concrete dam construction that the present invention is provided stitches the construction method of flexible leak stoppage, is blocked water by subdrilling
Hole, installs the mode for being perfused with plaster material film bag in stop water, has both ensured to prevent cement mortar not when body of paste is irrigated
Constrained diffusion ties up chemical grouting region, ensures again after plaster material hardening with there is certain change between concrete dam body
Shape；The step of chemical grouting hole and perfusion flexible blockage material, chemical grouting region is formd in construction joint, make reaction speed
Degree is controllable, greatly reduces chemical grouting risk, it is ensured that the speed and quality of chemical grouting；Basis can be solved and inequality occur
The problem of even sedimentation causes concrete construction joint leak, reduces engineering risk, it is ensured that safety in production.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is stop water and the position view in chemical grouting hole in the inventive method；
Fig. 2 is the Longitudinal cross section schematic of construction joint after the completion of the inventive method is constructed.
Embodiment
As in Fig. 1 and shown in Fig. 2, a kind of water storage concrete dam construction stitches the construction method of flexible leak stoppage, this method bag
Include following steps：
Step 1：Stop water is positioned：Appropriate portion is chosen at the two ends for the water storage concrete dam construction seam 1 for having ftractureed or having misplaced
Position respectively determines a stop water hole position, and positioning is marked.
Step 2：Block water hole drilling：Junction of the edges of two sheets of paper drilling is carried out in the stop water hole position that step 1 is selected, stop water 2 is formed；
Bore in stop water work progress and should be noted problems with：
If drilling is glanced off and is adjusted at any time, it is ensured that the junction of the edges of two sheets of paper drills；
If drilling, it is larger to glance off, adjust unsuccessful, the reaming in situ of larger-diameter drill bit can be chosen, or choose hole again
Position.
Step 3：Film bag 4 is installed：The film bag 4 installed in the stop water 2 that step 2 is drilled, the length of film bag, which is not less than, to block water
The height in hole 2；
Problems with is should be noted in the installation process of film bag 4：
If breakage occurs in any position of film bag 4, to repair in time, it is impossible to which repairing will be re-replaced.Film bag will in filling process
Remain intact, if any position in filling process of film bag 4 breakage occurs and to stop grouting, to being in the milk, stop water is swept again
Hole.
Film 4 sizes of bag and length will be matched with stop water 2, Zhi Neng great, it is impossible to small, and diameter is small to be changed in time.
Step 4：Irrigate plaster material：The filling plaster material into step 3 mounted film bag 4 is until the full whole film of filling
Bag 4, forms film bag packed layer 5；
When irrigating plaster material, if surface shrinkage after plaster material solidification, is filled up using cement mortar.
Volume has slight expansion after plaster material solidification, and film bag 4 is tightly squeezed on concrete dam body, and upstream is high-order
Current are blocked, it is ensured that chemical grouting section is constructed under the state that has no water or little water, therefore film bag perfusion plaster material is construction time resistance
The key of water.
Step 5：Chemical grouting hole 3 drills：Water storage concrete dykes and dams between two stop waters 2 of step 4 formation are applied
On work seam 1, suitable position is selected, junction of the edges of two sheets of paper drilling is carried out, bottom hole go directly design altitude, formation chemical grouting hole 3；
Step 6：Irrigate flexible blockage material：In the chemical grouting hole 3 being drilled to step 5 flexible blockage material is irrigated using biliquid pump
Material, to slurry is returned, returns slurry pressure and is no more than 0.2Mpa, then shield slurry a period of time（30-40 minutes, preferably 30 minutes）, until whole
Individual construction joint is tamped to form construction joint packed layer 6 by the reactant of polyurethane and water, that is, completes water storage concrete dam construction seam
Flexible leak stoppage.
In step 1, setting stop water 2 is required in construction joint upstream and downstream two ends appropriate location or according to design document, is blocked water
Hole 2 must junction of the edges of two sheets of paper drilling.
In step 3, the bag that film bag is made for geotextiles, with high, the corrosion-resistant, good water permeability of strength, easy construction etc.
Feature.
In step 5, the position in chemical grouting hole 3 is arranged between two stop waters, is advisable with easy construction.
The flexible blockage material irrigated in step 6 is oiliness polyurethane and aqueous polyurethane.
The method for filling of step 6 is：First perfusion oiliness polyurethane is until there is the outflow of oiliness polyurethane（Oiliness polyurethane and water
Reaction speed is slow, than great, first irrigate oiliness polyurethane in perfusion section, water is discharged, and full of all cracks, reaction hair
After life, interior pressure tamps smaller crack）, Reperfu- sion aqueous polyurethane（Now reaction speed accelerates, and larger crack is by successively
Tamp）, until whole construction joint 1 is tamped to form polyurethane in construction joint packed layer 6, construction joint by the reactant of polyurethane and water
Reaction is still may proceed to a small amount of water, volume may proceed to expansion.
Also can be 1 in mass ratio if the water in region of being in the milk is less:1 ratio pours into oiliness polyurethane and aqueous poly-
The mixture of urethane.
Claims (5)
1. a kind of water storage concrete dam construction stitches the construction method of flexible leak stoppage, it is characterised in that this method includes following step
Suddenly：
Step 1：Stop water is positioned：In the water storage concrete dam construction seam for having ftractureed or having misplaced（1）Two ends choose appropriate
Position respectively determines a stop water hole position, and positioning is marked；
Step 2：Block water hole drilling：Junction of the edges of two sheets of paper drilling is carried out in the stop water hole position that step 1 is selected, stop water is formed（2）；
Step 3：Film bag is installed（4）：The stop water that step 2 is drilled（2）The film bag of interior installation（4）, the length of film bag is not less than resistance
Water hole（2）Height；
Step 4：Irrigate plaster material：To the mounted film bag of step 3（4）Interior filling plaster material is until the full whole film bag of filling
（4）, form film bag packed layer（5）；
Step 5：Chemical grouting hole（3）Drilling：In two stop waters of step 4 formation（2）Between water storage concrete dykes and dams apply
Work is stitched（1）On, suitable position is selected, junction of the edges of two sheets of paper drilling is carried out, chemical grouting hole is formed（3）；
Step 6：Irrigate flexible blockage material：The chemical grouting hole being drilled to step 5（3）Interior perfusion flexible blockage material, to returning
Slurry, then shield slurry a period of time, until whole construction joint is tamped to form construction joint packed layer by the reactant of polyurethane and water（6）,
Complete the flexible leak stoppage of water storage concrete dam construction seam.
2. a kind of water storage concrete dam construction according to claim 1 stitches the construction method of flexible leak stoppage, its feature exists
In：In step 3, the bag that film bag is made for geotextiles.
3. a kind of water storage concrete dam construction according to claim 1 stitches the construction method of flexible leak stoppage, its feature exists
The plaster material irrigated in step 4 is mixed by cement, water and flocculant and is made, the mass ratio of cement, water and flocculant
For 0.5-0.7:1:0.01-0.02.
4. a kind of water storage concrete dam construction according to claim 1 stitches the construction method of flexible leak stoppage, its feature exists
In：The flexible blockage material irrigated in step 6 is oiliness polyurethane and aqueous polyurethane.
5. a kind of water storage concrete dam construction according to claim 4 stitches the construction method of flexible leak stoppage, its feature exists
It is in the method for filling of step 6：First perfusion oiliness polyurethane is up to there is oiliness polyurethane to flow out, Reperfu- sion aqueous polyurethane, directly
To whole construction joint（1）Tamped to form construction joint packed layer by the reactant of polyurethane and water（6）.
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| CN201710326302.1A CN107034848B (en) | 2017-05-10 | 2017-05-10 | A kind of construction method of water storage concrete dam construction seam flexible leak stoppage |
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| CN107034848A true CN107034848A (en) | 2017-08-11 |
| CN107034848B CN107034848B (en) | 2019-06-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729414A (en) * | 2018-05-14 | 2018-11-02 | 中水电第十工程局（郑州）有限公司 | A kind of concrete gravity dam transverse joint seepage treatment method |
| CN110318371A (en) * | 2019-06-27 | 2019-10-11 | 徐州工程学院 | A method of ensure to construct quality rich in water dykes and dams polyurethane protective system |
| CN115387354A (en) * | 2022-09-05 | 2022-11-25 | 中国海洋大学 | Seepage-proofing construction method and seepage-proofing structure for foundation pit support structure construction joint in water-rich area |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009052204A (en) * | 2007-08-23 | 2009-03-12 | Nippon Concrete Ind Co Ltd | Concrete structure |
| CN202390813U (en) * | 2011-11-30 | 2012-08-22 | 中国水电顾问集团西北勘测设计研究院 | Concrete mold bag for maintenance of gate water seal |
| CN105970879A (en) * | 2016-05-16 | 2016-09-28 | 浙江广川工程咨询有限公司 | Method for quick recovery of vertical water stoppage of water gate |
| CN106498905A (en) * | 2016-11-23 | 2017-03-15 | 中国电建集团成都勘测设计研究院有限公司 | A kind of concrete gravity dam transverse joint water seepage treatment structure |
-
2017
- 2017-05-10 CN CN201710326302.1A patent/CN107034848B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009052204A (en) * | 2007-08-23 | 2009-03-12 | Nippon Concrete Ind Co Ltd | Concrete structure |
| CN202390813U (en) * | 2011-11-30 | 2012-08-22 | 中国水电顾问集团西北勘测设计研究院 | Concrete mold bag for maintenance of gate water seal |
| CN105970879A (en) * | 2016-05-16 | 2016-09-28 | 浙江广川工程咨询有限公司 | Method for quick recovery of vertical water stoppage of water gate |
| CN106498905A (en) * | 2016-11-23 | 2017-03-15 | 中国电建集团成都勘测设计研究院有限公司 | A kind of concrete gravity dam transverse joint water seepage treatment structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729414A (en) * | 2018-05-14 | 2018-11-02 | 中水电第十工程局（郑州）有限公司 | A kind of concrete gravity dam transverse joint seepage treatment method |
| CN110318371A (en) * | 2019-06-27 | 2019-10-11 | 徐州工程学院 | A method of ensure to construct quality rich in water dykes and dams polyurethane protective system |
| CN115387354A (en) * | 2022-09-05 | 2022-11-25 | 中国海洋大学 | Seepage-proofing construction method and seepage-proofing structure for foundation pit support structure construction joint in water-rich area |
| CN115387354B (en) * | 2022-09-05 | 2023-08-15 | 中国海洋大学 | Seepage-proofing construction method and seepage-proofing structure for foundation pit support structure construction joint in water-rich area |
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| Publication number | Publication date |
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| CN107034848B (en) | 2019-06-28 |
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