CN110158542A - The Lossless connection structure and construction method of cut-pff wall and nut cap concrete - Google Patents
The Lossless connection structure and construction method of cut-pff wall and nut cap concrete Download PDFInfo
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- CN110158542A CN110158542A CN201910520066.6A CN201910520066A CN110158542A CN 110158542 A CN110158542 A CN 110158542A CN 201910520066 A CN201910520066 A CN 201910520066A CN 110158542 A CN110158542 A CN 110158542A
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- 239000004567 concrete Substances 0.000 title claims abstract description 96
- 238000010276 construction Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000011435 rock Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 28
- 239000010959 steel Substances 0.000 claims description 28
- 238000010008 shearing Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 16
- 230000002950 deficient Effects 0.000 claims description 13
- 239000002131 composite material Substances 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims description 6
- 238000005215 recombination Methods 0.000 claims description 6
- 230000006798 recombination Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 description 26
- 239000002893 slag Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012633 leachable Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The present invention relates to the Lossless connection structures and construction method of a kind of cut-pff wall and nut cap concrete.The Lossless connection structure and construction method of the object of the present invention is to provide a kind of structures cut-pff wall simple, easy for construction and nut cap concrete, it is meant to ensure that cut-off wall and nut cap concrete form closed structure, solves the problems, such as that conventional connection method easily forms concentrated leakage passage.The technical scheme is that the Lossless connection structure of a kind of cut-pff wall and nut cap concrete, it is characterized by: having cofferdam weir body, guide groove is equipped at the top of the body of cofferdam weir, cut-pff wall corresponding with the guide groove of top is equipped in the body of cofferdam weir, it is equipped with fill concrete layer above cut-pff wall, has poured nut cap concrete on the fill concrete layer and guide groove.The present invention carries out the similar engineerings such as high earth rock cofferdam, earth and rockfill dam and the dyke of seepage control of cofferdam foundation suitable for water power hydraulic engineering using cut-pff wall.
Description
Technical field
The present invention relates to the Lossless connection structures and construction method of a kind of cut-pff wall and nut cap concrete.Suitable for water power
The similar engineerings such as high earth rock cofferdam, earth and rockfill dam and the dyke of seepage control of cofferdam foundation are carried out in hydraulic engineering using cut-pff wall.
Background technique
With the implementation of China's strategy to develop western regions, earth rock cofferdam height and scale increase year by year, high earth rock cofferdam skill
Art difficulty also increases with cofferdam scale and is promoted.Earth rock cofferdam lower part generally need under water throwing formed, many cofferdam are using modeling
Property concrete cut carry out the seepage control of cofferdam foundation of throwing part and alluvial deposit foundation part, it is more than cut-pff wall anti-using geomembrane
It seeps.Nut cap concrete is poured again after needing to excavate surface layer defective material concrete after cut-off wall grooving pours, by nut cap concrete
Undertake the fade function between cut-pff wall and geomembrane.Therefore, the connection of nut cap concrete and cut-pff wall itself and closure pole
To be important, it need to ensure that the interstructural mechanics of unlike material, antiseepage smoothly transit.
Nut cap concrete with poured cut-pff wall material, construction technology is all different, due to water pressure, weir body filler be self-possessed
And squeezing action caused by poisson effect, nut cap concrete are often in eccentric force state, nut cap concrete and antiseepage wall joint
Place easily occurs to stretch disengagement or shearing slip forms concentrated leakage passage.If guarantee nut cap concrete and cut-pff wall wall top it
Between leakproofness and use conventional rubber water-proof, then anchor slot need to be dug at the top of cut-pff wall, anchor slot forming process is easily right
Penetrating crack damage is generated at the top of cut-pff wall (the especially lower plastic concrete cut-off wall of intensity), so as to cause cut-pff wall
Leakage is serious.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above problems, it is simple, easy for construction to provide a kind of structure
Cut-pff wall and nut cap concrete Lossless connection structure and construction method, it is intended to guarantee cut-off wall and nut cap concrete
Closed structure is formed, solves the problems, such as that conventional connection method easily forms concentrated leakage passage.
The technical scheme adopted by the invention is that: a kind of Lossless connection structure of cut-pff wall and nut cap concrete, it is special
Sign is: having cofferdam weir body, guide groove is equipped at the top of the body of cofferdam weir, is equipped in the body of cofferdam weir corresponding with the guide groove of top
Cut-pff wall, cut-pff wall top are equipped with fill concrete layer, have poured nut cap concrete on the fill concrete layer and guide groove；
Be embedded in the cut-pff wall it is several extend at the top of the cut-pff wall cut-pff wall bottom, for being carried out to wall base rock
Grout curtain simultaneously fills real anti-shearing grouting steel pipe using concrete after the completion of grouting；
Water expandable waterstop, the water-swellable are equipped at the top of the cut-pff wall between the fill concrete layer above it
Sealing rod is set to the two sides of cut-pff wall axis and along the elongated arrangement of cut-pff wall axis；
It is fixed with composite geo-membrane through bolt at the top of the fill concrete layer, which extends to the guiding
Slot is outer and is connected with weir bluk recombination geomembrane anti-seepage system.
The laitance defective material concrete layer at the top of it has been cut at the top of the cut-pff wall.
Fill concrete layer top surface is higher than the guiding groove bottom.
The nut cap concrete crest level is higher by the guide groove crest level more than or equal to 100cm.
The water expandable waterstop uses strip BW type water expandable waterstop.
A kind of construction method of cut-pff wall and the Lossless connection structure of nut cap concrete, which is characterized in that steps are as follows:
A, cofferdam weir body is set；
B, the construction guidance slot at the top of the body of cofferdam weir；
C, it using guide groove as operation platform, is excavated in the cofferdam weir body below guide groove and forms use corresponding with guide groove
Slot is poured in pour cut-pff wall；
D, it pours in slot and buries anti-shearing grouting steel pipe, steel pipe is divided into slot bottom, and grouting steel pipe crest level is guiding groove top
Elevation；
E, it pours in slot and pours to form cut-pff wall；
F, by pre-buried anti-shearing grouting steel pipe, the grout curtain of wall bottom is carried out using orifice closing method or segmentation blocking method
To design baseline；
G, the laitance defective material concrete layer at the top of cut-pff wall is cut until the higher concrete stabilized zone of compactness；
H, anti-shearing grouting steel pipe 30~50cm of the cut-pff wall top surface after cutting or more is truncated to as subsequent nut cap to resist
Miniature tubular pole is cut, is filled in fact in steel pipe using neat slurry；
I, water expandable waterstop is laid in cut-pff wall top surface, cut-pff wall axis two sides；
J, the laitance defective material concrete layer at the top of cut-pff wall cuts region concrete time and pours, and forms fill concrete layer；
K, composite geo-membrane is fixed at the top of fill concrete layer using bolt and composite geo-membrane is extended into guiding
Slot is outer to be connected with weir bluk recombination geomembrane anti-seepage body, and the fill concrete layer by no geomembrane without the area of coverage and guide groove side
Dabbing；
L, formwork erection pours nut cap concrete above fill concrete layer and guide groove.
Step e pours the antiseepage wall crest elevation to be formed and is more than or equal to 0.5m more than guide groove bottom elevation.
Step i water expandable waterstop is fixed at the top of the cut-pff wall using cement steel nail.
When water expandable waterstop laying need to overlap in step i, connector uses horizontally overlapping method, and the lap of splice needs to control
System is in 5cm or more.
The nut cap concrete pours elevation eventually and is more than or equal to 100cm beyond the guide groove crest level.
The beneficial effects of the present invention are: the present invention is by being arranged water expandable waterstop, Yi Ji at the top of setting cut-pff wall
Anti-shearing grouting steel pipe is reserved in cut-pff wall, excessive extrusion shearing occurs for the joint for improving cut-pff wall wall top and nut cap concrete
It deforms there is a situation where concentrative seepage, no longer needs to setting rubber water-proof item of individually slotting, avoid damage to cut-pff wall.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment.
Fig. 2 is the enlarged diagram in the portion A in Fig. 1.
Specific embodiment
As shown in Figure 1, the present embodiment is the Lossless connection structure of a kind of cut-pff wall and nut cap concrete, there is cofferdam weir
Body, cofferdam weir body top are equipped with guide groove 4, are equipped with cut-pff wall 5 corresponding with the guide groove 4 of top, cut-pff wall 5 in the body of cofferdam weir
Top is equipped with fill concrete layer 7, has poured nut cap concrete 9 on fill concrete layer 7 and guide groove 4.
Several anti-shearing fillings that 5 bottom of cut-pff wall is extended at the top of cut-pff wall 5 are embedded in the present embodiment in cut-pff wall 5
Steel pipe 6 is starched, anti-shearing grouting steel pipe 6 is used to be in the milk to the wall bottom curtain of 5 lower section of cut-pff wall, and uses after the completion of grouting
Concrete fills real.
Water expandable waterstop 8, the chance are equipped between 5 top of cut-pff wall and the fill concrete layer 7 above it in this example
Water expansion sealing strip is set to the two sides of 5 axis of cut-pff wall and along the elongated arrangement of 5 axis of cut-pff wall.
It is fixed with composite geo-membrane 10 through M16 bolt at the top of fill concrete layer in the present embodiment, which prolongs
It extends to outside guide groove 4 and is connected with weir bluk recombination geomembrane anti-seepage system.
Water expandable waterstop 8 is adopted as strip BW type water expandable waterstop in the present embodiment, and expansion rate 150%~
180% (no leachable), elongation percentage be greater than 450%, erosive wear resistance is good, tensile strength be greater than 70kPa, 80 DEG C of high temperature resistant
(appearance is glossy, and any bending is soft, flawless), it is low temperature resistant -20 DEG C, flexible good, there is no wrinkle breach.
The concrete construction method of this example is as follows:
A, body filler in cofferdam weir is arranged: forming 5 supporter of cut-pff wall, microlith slag using the underwater throwing microlith slag 1 of method of attacking and occupying
Expect that 1 crest level need to be beyond the construction of cut-pff wall 5 period water level 2m；Thickness is trained rapidly and increases bedding material 2, rubble slag charge 3 in 1 two sides of microlith slag
To 4 bottom elevation of concrete guide groove.
B, concrete guide groove is arranged: at 1 top of microlith slag charge, building concrete guiding by foundation of microlith slag charge
Slot 4, as 5 operation platform of cut-pff wall and axis guide wall.
C, the slot that pours of cut-pff wall 5 is arranged: using guide groove as operation platform, excavating in the microlith slag charge below guide groove
Formed it is corresponding with guide groove be used to pour cut-pff wall pour slot.
D, pre-buried anti-shearing grouting steel pipe: the anti-shearing grouting steel pipe 6 of 91~110mm of caliber is divided into after pouring slot grooving
To slot bottom, anti-shearing 6 elevation of grouting steel pipe is guide groove crest level, and the general spacing of steel pipe is 1.0~1.5m.
E, cut-pff wall 5 is arranged: pouring pouring construction cut-pff wall 5 in slot using method of kicking off, 5 crest level of cut-pff wall is more than to lead
To slot bottom elevation 50cm.
F, the grout curtain of wall bottom is arranged: being carried out by anti-shearing grouting steel pipe 6 using orifice closing method or segmentation blocking method
The grout curtain of wall bottom is to designing baseline.
G, laitance defective material concrete layer is cut: manually successively cutting 5 top of cut-pff wall using light-duty equipments such as hand-held pneumatic picks
The laitance defective material concrete layer of 50cm~100cm thickness is until the higher concrete stabilized zone of compactness.
H, anti-shearing grouting steel pipe truncates: anti-shearing grouting steel pipe 6 being truncated to chisel using hacksaw or high-temperature machining technology
Except more than the cut-pff wall top surface after laitance defective material concrete layer 30~50cm is as the subsequent miniature tubular pole of nut cap shearing resistance, adopted in steel pipe
Fill real with neat slurry.
I, Lossless sealing is arranged: 5 top surface of cut-pff wall after cutting laitance defective material concrete layer, from cut-pff wall axis two
Water expandable waterstop 8 is laid with using mounting method at the 20cm of side, interval appropriately distance can be fixed with cement steel nail, prevent from pouring
There is the phenomenon that sealing rod displacement during building, water expandable waterstop 8 is along the elongated arrangement of 5 axis of antiseepage wall top.Such as Fig. 2 institute
Show, when the laying of water expandable waterstop 8 need to overlap, it is necessary to there are enough laps of splice, forbid the method using docking, connector must
It must need to be controlled using the method for horizontally overlapping (lateral overlap joint), the lap of splice in 5cm or more.
J, laitance defective material concrete layer cuts region concrete time and pours: backfilling laitance defective material concrete using normal concrete
Layer cuts region, forms fill concrete layer.
K, composite geo-membrane anchoring setting: composite geo-membrane 10 is fixed at the top of fill concrete layer using M16 bolt
And composite geo-membrane 10 is extended and is connected outside guide groove with weir bluk recombination geomembrane anti-seepage body.It will be returned without geomembrane without the area of coverage
Fill out concrete layer and guide groove side dabbing.
L, nut cap concrete is arranged: formwork erection pours nut cap concrete 9, and nut cap concrete 9 pours elevation beyond guiding groove top eventually
Elevation is not less than 100cm.
In the present embodiment, water expandable waterstop 8 should carry out seepage control measure after the completion of being laid with, right before concreting
The exposed sealing rod in concrete interface need to cover layer of plastic film in time, prevent sealing rod water-swellable, to nut cap coagulation
When soil pours, then throw off plastic film.
Claims (10)
1. the Lossless connection structure of a kind of cut-pff wall and nut cap concrete, it is characterised in that: have cofferdam weir body, cofferdam weir body
Top is equipped with guide groove (4), is equipped with cut-pff wall (5) corresponding with guide groove (4) of top in the body of cofferdam weir, on cut-pff wall (5)
Side is equipped with fill concrete layer (7), has poured nut cap concrete (9) on the fill concrete layer (7) and guide groove (4)；
Be embedded in the cut-pff wall (5) it is several extended at the top of cut-pff wall (5) cut-pff wall (5) bottom, for wall base
Rock carries out grout curtain and fills real anti-shearing grouting steel pipe (6) using concrete after the completion of grouting；
Water expandable waterstop (8) are equipped between the fill concrete layer (7) above it at the top of the cut-pff wall (5), the chance
Water expansion sealing strip is set to the two sides of cut-pff wall (5) axis and along the elongated arrangement of cut-pff wall (5) axis；
It is fixed with composite geo-membrane (10) at the top of the fill concrete layer (7) through bolt, which extends to described
Guide groove (4) is connected outside and with weir bluk recombination geomembrane (10) seepage prevention system.
2. the Lossless connection structure of cut-pff wall according to claim 1 and nut cap concrete, it is characterised in that: described anti-
Seep the laitance defective material concrete layer cut at the top of it at the top of wall (5).
3. the Lossless connection structure of cut-pff wall according to claim 1 or 2 and nut cap concrete, it is characterised in that: institute
Fill concrete layer (7) top surface is stated higher than the guide groove (4) bottom surface.
4. the Lossless connection structure of cut-pff wall according to claim 1 and nut cap concrete, it is characterised in that: the lid
Cap concrete (9) crest level is higher by the guide groove (4) crest level more than or equal to 100cm.
5. the Lossless connection structure of cut-pff wall according to claim 1 and nut cap concrete, it is characterised in that: the chance
Water expansion sealing strip (8) uses strip BW type water expandable waterstop (8).
6. the construction party of the Lossless connection structure of cut-pff wall described in a kind of Claims 1 to 5 any one and nut cap concrete
Method, which is characterized in that steps are as follows:
A, cofferdam weir body is set；
B, the construction guidance slot (4) at the top of the body of cofferdam weir；
C, it is right with guide groove (4) that formation is excavated with guide groove (4) for operation platform, in the cofferdam weir body below guide groove (4)
That answers pours slot for pour cut-pff wall (5)；
D, it pours in slot and buries anti-shearing grouting steel pipe (6), steel pipe is divided into slot bottom, and grouting steel pipe crest level is guide groove (4)
Crest level；
E, it pours in slot and pours to form cut-pff wall (5)；
F, by pre-buried anti-shearing grouting steel pipe (6), the grout curtain of wall bottom is carried out using orifice closing method or segmentation blocking method
To design baseline；
G, the laitance defective material concrete layer at the top of cut-pff wall (5) is cut until the higher concrete stabilized zone of compactness；
H, anti-shearing grouting steel pipe (6) is truncated to 30~50cm of the cut-pff wall after cutting (5) top surface or more as subsequent nut cap
The miniature tubular pole of shearing resistance, steel pipe is interior to fill real using neat slurry；
I, water expandable waterstop (8) are laid in cut-pff wall (5) top surface, cut-pff wall (5) axis two sides；
J, the laitance defective material concrete layer at the top of cut-pff wall (5) cuts region concrete time and pours, and is formed fill concrete layer (7)；
K, composite geo-membrane (10) is fixed at the top of fill concrete layer (7) using bolt and extends composite geo-membrane (10)
Guide groove (4) is connected with weir bluk recombination geomembrane (10) impervious body outside out, and the fill concrete by no geomembrane without the area of coverage
Layer (7) and guide groove (4) side dabbing；
L, formwork erection pours nut cap concrete (9) above fill concrete layer (7) and guide groove (4).
7. construction method according to claim 6, it is characterised in that: it is super that step e pours the cut-pff wall to be formed (5) crest level
The guide groove (4) bottom elevation is crossed more than or equal to 0.5m.
8. construction method according to claim 6, it is characterised in that: step i water expandable waterstop (8) uses cement steel
Nail is fixed at the top of the cut-pff wall (5).
9. construction method according to claim 6, it is characterised in that: water expandable waterstop (8) laying need to take in step i
When connecing, connector uses horizontally overlapping method, and the lap of splice need to be controlled in 5cm or more.
10. construction method according to claim 6, it is characterised in that: the nut cap concrete (9) pours elevation beyond institute eventually
Guide groove (4) crest level is stated more than or equal to 100cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910520066.6A CN110158542A (en) | 2019-06-17 | 2019-06-17 | The Lossless connection structure and construction method of cut-pff wall and nut cap concrete |
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| CN201910520066.6A CN110158542A (en) | 2019-06-17 | 2019-06-17 | The Lossless connection structure and construction method of cut-pff wall and nut cap concrete |
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Cited By (3)
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| CN114855840A (en) * | 2022-06-01 | 2022-08-05 | 中国水利水电第八工程局有限公司 | Earth-rock cofferdam and concrete cofferdam connecting structure and construction method thereof |
| CN115030203A (en) * | 2022-07-18 | 2022-09-09 | 南京宇正建设工程有限公司 | Construction structure and construction method of high-pressure jet grouting impervious wall |
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| CN114855840A (en) * | 2022-06-01 | 2022-08-05 | 中国水利水电第八工程局有限公司 | Earth-rock cofferdam and concrete cofferdam connecting structure and construction method thereof |
| CN115030203A (en) * | 2022-07-18 | 2022-09-09 | 南京宇正建设工程有限公司 | Construction structure and construction method of high-pressure jet grouting impervious wall |
| CN115030203B (en) * | 2022-07-18 | 2024-01-05 | 南京宇正建设工程有限公司 | Construction structure of high-pressure rotary spraying impervious wall and construction method thereof |
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