CN109989490A - Discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure and construction method - Google Patents
Discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure and construction method Download PDFInfo
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- CN109989490A CN109989490A CN201910386335.4A CN201910386335A CN109989490A CN 109989490 A CN109989490 A CN 109989490A CN 201910386335 A CN201910386335 A CN 201910386335A CN 109989490 A CN109989490 A CN 109989490A
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- Prior art keywords
- expansion joint
- rectangular channel
- watertight seal
- resistant abrasion
- joint surface
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6812—Compressable seals of solid form
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Building Environments (AREA)
Abstract
The present invention proposes a kind of discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure and construction method, is related to building expansion joint surface watertight seal and resistant abrasion protection technology field.It include: the expansion joint constituted between two blocks of adjacent concrete, the expansion joint is embedded to be filled with compression plate；Rectangular channel, the middle part of the rectangular channel is located at the surface of compression plate, the top surface of rectangular channel and the top surface of concrete are generally aligned in the same plane, high resiliency mortar is filled in rectangular channel, the top surface of two pieces of adjacent concretes and the top surface of high resiliency mortar are painted with a bed boundary agent, it is painted with polyurea coating in the bed boundary agent, tire base fabric is provided in polyurea coating.The present invention is constituted comprehensive resistant abrasion seepage prevention system with high resiliency mortar and polyureas composite tyre base fabric, this seepage prevention system is made of filling high resiliency mortar and polyureas composite tyre scrim surfaces confining bed in expansion joint, flood releasing structure high-velocity flow can be resisted to wash away and resist positive/negative to water pressure, the deformation for adapting to expansion joint substantially increases the reliability and safety of expansion joint surface watertight seal.
Description
Technical field
The present invention relates to building expansion joint surface watertight seal and resistant abrasion protection technology fields, particularly relate to a kind of sluice and build
Build object expansion joint surface watertight seal resistant abrasion safeguard structure and construction method.
Background technique
Temperature change and differential settlement etc. often cause the deformation of concrete structure, and hydraulic structure is in order to adapt to temperature
Malformation caused by degree variation and differential settlement etc., often needs that a series of expansion joints are arranged, should meet deformation requirements
Meet antiseepage requirement again.The expansion joint sealing of hydraulic structure is one extremely important and be easy to ignored problem, work
Waterstop distortion, dislocation and deformation in journey, concrete vibrating leakiness and artificial destruction etc. often lead to expansion joint and seep
Phenomenon is leaked, brings hidden danger, especially overfall dam, spillway, flood-discharge tunnel and dam body culvert pipe etc. to let out to the safe operation of building
The expansion joint of water buildings, once leak will seriously threaten engineering safety.
The characteristics of according to discharge structure, the structure that the selection of expansion joint surface watertight seal material should adapt to expansion joint become
Shape, again including, do not destroy under the action of external water pressure, while should also have good durability and resist high-velocity flow and wash away
Ability, all to expansion joint surface layer seepage, more stringent requirements are proposed for these.Past, common expansion joint surface layer was stopped
Water material includes the sealing materials such as asphalt mortar, bituminous mortar, plastic ointment, PVC cement, tar plastic mortars, in recent years polyurethane,
The high molecular materials such as polysulfide sealant start to be widely applied in hydraulic engineering, but there are easy to aging, bondings for these sealing materials
Power is low, adaptive deformation ability difference and the outstanding problems such as not environmentally, greatly reduces the reliability and safety of expansion joint surface watertight seal
Property, sealing material is difficult to meet engine request.
Summary of the invention
The present invention proposes that a kind of construction is simple, barrier performance be good, resistant abrasion, the sluicing suitable for high-velocity flow souring
Building expansion joint surface watertight seal resistant abrasion safeguard structure and construction method, solve the above problem of the existing technology.
The technical scheme of the present invention is realized as follows:
Discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure, comprising:
The expansion joint constituted between two blocks of adjacent concrete, the expansion joint is embedded to be filled with compression plate；
Rectangular channel, the middle part of the rectangular channel are located at the surface of compression plate, the top surface of rectangular channel and the top surface of concrete
It is generally aligned in the same plane, high resiliency mortar is filled in rectangular channel, high resiliency mortar is limited by Beijing Zhong Shui Ke Haili engineering technology
The special product of company's development & production.The top surface of two pieces of adjacent concretes and the top surface of high resiliency mortar are painted with a bed boundary
Agent is painted with polyurea coating in the bed boundary agent, tire base fabric is provided in polyurea coating.
Further, it is painted with a bed boundary agent on the side wall of the rectangular channel, is painted with one layer on the inside of the bed boundary agent
Single-component polyurea, high resiliency mortar backfill between single-component polyurea.
Preferably, the size of the rectangular channel are as follows: wide 2~6cm, deep 1.5~4cm, and width is greater than depth.
Preferably, the polyurea coating with a thickness of 3~5mm, width is 25~100cm.
Preferably, the width of the tire base fabric is less than the width of polyurea coating.
Preferably, the width of the polyureas is less than the width of interfacial agents.
Further, the polyurea coating is that single-component polyurea or two-component solidify polyureas, tensile strength > slowly
15MPa, elongation at break > 150%, water absorption rate < 5%.
Preferably, the compression plate is one of styrofoam, benzene plate, plank.
Preferably, the tensile strength > 1.5MPa of the high resiliency mortar, elongation at break > 15%, impact resistance is big
In 15000 times, it is greater than 2.0MPa with Concrete Bond Strength, compression strength is greater than 15MPa, and has elasticity, compression 30~
It can restore to the original state after 50% unloading.
Discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure construction method, comprising the following steps:
1) rectangular channel is dug on expansion joint surface layer or construct rectangular channel using original slit width；
2) pointing fills compression plate among expansion joint, is used to support effect；
3) a bed boundary agent is first brushed in the rectangular channel two sides in step 1), and it is poly- to brush one layer of one pack system after interfacial agents surface drying
Urea, backward rectangular channel in backfill can adapt to expansion joint deformation high resiliency mortar, compacting smooth out；
4) in the one bed boundary agent of expansion joint two sides concrete surface and the brushing of high resiliency mortar surface, to the bed boundary, agent refers to
Then brushing first layer polyureas after dry pastes one layer of tire base fabric, 2~4 layers of brushing polyureas again after polyureas is dry, until polyurea coating
Reach 3~5mm.
The invention has the benefit that
1, for the limitation of building conventional telescopic seam surface watertight seal, consider that high-velocity flow washes away and positive/negative to hydraulic pressure
The complexity for acting on lower expansion joint antiseepage, is constituted integrated antiseepage system with high resiliency mortar and polyureas composite tyre base fabric, this antiseepage
System is made of filling high resiliency mortar and polyureas composite tyre scrim surfaces confining bed in expansion joint, substantially increases expansion joint table
The reliability and safety of layer sealing.
2, have the function of adapting to flood releasing structure high-velocity flow to wash away and positive/negative to water pressure, and frost resistance, antiseepage
Property and durability are good, construction is simple, conveniently.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the structure of a kind of discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure of the present invention and construction method
Schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure of the present invention and applying
Work method, comprising:
The expansion joint 2 constituted between two blocks of adjacent concrete 1, the expansion joint 2 is embedded to be filled with compression plate 3；
Rectangular channel 4, the middle part of the rectangular channel 4 are located at the surface of compression plate 3, top surface and the concrete 1 of rectangular channel 4
Top surface is generally aligned in the same plane, and is filled with high resiliency mortar 5 in rectangular channel 4, the top surface of two pieces of adjacent concretes 1 and high resiliency mortar 5
Top surface be painted with a bed boundary agent 6, polyurea coating 7 is painted in the bed boundary agent 6, tire base fabric is provided in polyurea coating 7
8。
It is painted with a bed boundary agent 9 on the side wall of the rectangular channel 4, one layer of one pack system is painted on the inside of the bed boundary agent 9
Polyureas 10, high resiliency mortar 5 backfill between single-component polyurea 10.
The size of the rectangular channel 4 are as follows: wide 2~6cm, deep 1.5~4cm, and width is greater than depth.Rectangular channel 4, which is located at, to be stretched
2 surface layer of contracting seam
The polyurea coating 7 with a thickness of 3~5mm, width is 25~100cm.
The width of the tire base fabric 8 is less than the width of polyurea coating.
The width of the polyurea coating 7 is less than the width of interfacial agents 6.
The polyurea coating 7 is single-component polyurea or two-component solidifies polyureas slowly, and tensile strength > 15MPa, fracture are stretched
Long rate > 150%, water absorption rate < 5%.
The compression plate 3 is one of styrofoam, benzene plate, plank.
The tensile strength > 1.5MPa of the high resiliency mortar 5, elongation at break > 15%, impact resistance is greater than
15000 times, it is greater than 2.0MPa with Concrete Bond Strength, compression strength is greater than 15MPa, and has splendid elasticity, compression
It can restore to the original state after 30~50% unloadings.
Discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure construction method, comprising the following steps:
1) rectangular channel is dug on expansion joint surface layer or construct rectangular channel using original slit width；
2) pointing fills compression plate among expansion joint, is used to support effect；
3) a bed boundary agent is first brushed in the rectangular channel two sides in step 1), and it is poly- to brush one layer of one pack system after interfacial agents surface drying
Urea, backward rectangular channel in backfill can adapt to expansion joint deformation high resiliency mortar, compacting smooth out；
4) in expansion joint two sides concrete surface and another bed boundary agent of high resiliency mortar surface brushing, to the bed boundary agent
Refer to it is dry after brushing first layer polyureas, then paste one layer of tire base fabric, 2~4 layers of brushing polyureas again after polyureas is dry, until polyureas applies
Layer reaches 3~5mm.
The present invention is able to satisfy following requirement:
(1) meet the requirement for resisting 0.5~1.0MPa of back side and upstream face 1.0~2.5MPa water pressure.
(2) it is able to satisfy the construction requirement of expansion joint 2~8cm of slit width degree.
(3) it is able to satisfy the requirement of expansion joint large deformation.
(4) durability is good, freeze thawing resistance, water-fast, antiseepage, antiscour (flow velocity about 40m/s), is able to satisfy long-term with requirement.
(5) easy for construction, to original structure without broken.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure characterized by comprising
The expansion joint constituted between two blocks of adjacent concrete, the expansion joint is embedded to be filled with compression plate；
Rectangular channel, the middle part of the rectangular channel are located at the surface of compression plate, and the top surface of rectangular channel and the top surface of concrete are located at
Same plane, is filled with high resiliency mortar in rectangular channel, and the top surface of two pieces of adjacent concretes and the top surface of high resiliency mortar are painted with
One bed boundary agent is painted with polyurea coating in the bed boundary agent, tire base fabric is provided in polyurea coating.
2. discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure according to claim 1 is it is characterized in that, institute
It states and is painted with a bed boundary agent on the side wall of rectangular channel, which has one layer of single-component polyurea, high resiliency sand
Slurry backfill is between single-component polyurea.
3. discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure according to claim 2 is it is characterized in that, institute
State the size of rectangular channel are as follows: wide 2~6cm, deep 1.5~4cm, and width is greater than depth.
4. discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure according to claim 1 is it is characterized in that, institute
State polyurea coating with a thickness of 3~5mm, width is 25~100cm, the adhesive strength between polyurea coating and basal plane concrete >=
2.5MPa。
5. discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure according to claim 1 is it is characterized in that, institute
The width for stating tire base fabric is less than the width of polyurea coating.
6. discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure according to claim 5 is it is characterized in that, institute
The width for stating polyureas is less than the width of interfacial agents.
7. discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure according to claim 4 is it is characterized in that, institute
Stating polyurea coating is that single-component polyurea or two-component solidify polyureas slowly, tensile strength > 15MPa, elongation at break > 150%,
Water absorption rate < 5%.
8. discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure according to claim 1 is it is characterized in that, institute
Stating compression plate is one of styrofoam, benzene plate, plank.
9. discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure according to claim 1 is it is characterized in that, institute
The tensile strength > 1.5MPa of high resiliency mortar is stated, elongation at break > 15%, impact resistance is greater than 15000 times, with coagulation
Native adhesion strength is greater than 2.0MPa, and compression strength is greater than 15MPa, and has elasticity, can restore after 30~50% unloading of compression
Original state.
10. a kind of discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure construction method, which is characterized in that including following
Step:
1) rectangular channel is dug on expansion joint surface layer or construct rectangular channel using original slit width；
2) pointing fills compression plate among expansion joint, is used to support effect；
3) a bed boundary agent is first brushed in the rectangular channel two sides in step 1), brushes one layer of single-component polyurea after interfacial agents surface drying,
Backward rectangular channel in backfill can adapt to expansion joint deformation high resiliency mortar, compacting smooth out；
4) in the one bed boundary agent of expansion joint two sides concrete surface and the brushing of high resiliency mortar surface, after the bed boundary agent refer to it is dry after
Then brushing first layer polyureas pastes one layer of tire base fabric, 2~4 layers of brushing polyureas again after polyureas is dry, until polyurea coating reaches
3~5mm.The width of interfacial agents is greater than polyureas width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910386335.4A CN109989490A (en) | 2019-05-09 | 2019-05-09 | Discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure and construction method |
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| CN201910386335.4A CN109989490A (en) | 2019-05-09 | 2019-05-09 | Discharge structure expansion joint surface watertight seal resistant abrasion safeguard structure and construction method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714781A (en) * | 2019-10-17 | 2020-01-21 | 北京金河水务建设集团有限公司 | Tunnel expansion joint repairing method |
| CN111676907A (en) * | 2020-06-18 | 2020-09-18 | 中国水利水电科学研究院 | Concrete panel pressure joint surface layer water stopping structure and construction method thereof |
| CN111794237A (en) * | 2020-07-01 | 2020-10-20 | 长江勘测规划设计研究有限责任公司 | Concrete crack surface treatment structure and method |
| CN113914267A (en) * | 2021-11-11 | 2022-01-11 | 中国水利水电科学研究院 | Compressible water stop structure for joint surface layer of concrete panel in severe cold area and construction method |
| CN114960553A (en) * | 2022-05-23 | 2022-08-30 | 中国水利水电科学研究院 | Hydraulic asphalt concrete panel anti-seepage anti-abrasion protection structure and construction method |
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| CN113914267A (en) * | 2021-11-11 | 2022-01-11 | 中国水利水电科学研究院 | Compressible water stop structure for joint surface layer of concrete panel in severe cold area and construction method |
| CN114960553A (en) * | 2022-05-23 | 2022-08-30 | 中国水利水电科学研究院 | Hydraulic asphalt concrete panel anti-seepage anti-abrasion protection structure and construction method |
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