CN1891911A - Method for constructing ventilating permeable ecological concrete water-storage side slope - Google Patents
Method for constructing ventilating permeable ecological concrete water-storage side slope Download PDFInfo
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- CN1891911A CN1891911A CN 200510040877 CN200510040877A CN1891911A CN 1891911 A CN1891911 A CN 1891911A CN 200510040877 CN200510040877 CN 200510040877 CN 200510040877 A CN200510040877 A CN 200510040877A CN 1891911 A CN1891911 A CN 1891911A
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Abstract
The invention relates to a constructing method of aerating water penetration ecology concrete side slope. It sets an aerating water penetration ecology concrete layer constructed by graininess aggregate, concrete and the continuous clearance on the water storing side slope piling up by earth material. It has good reverse filtering effect and could effectively decrease the margin height of the water storing side slope.
Description
Technical field
The present invention relates to the construction method of the side slope that a kind of reservoir of being piled up by nature materials such as native sand, rocks, rivers and creeks dykes and dams etc. contact with water, specifically be meant a kind of construction method of ventilating permeable ecological concrete side slope.
Background technology
The most common slope protecting technique that adopts on reservoir side slopes such as reservoir, rivers and creeks dykes and dams mainly contains: the jackstone slope, grout bank protections such as stone, complete domatic cast in place concrete plate, precast concrete segment.But, no matter be any technology, all be on the mound side slope, to cover sand stone layer etc. earlier strictly speaking, playing the effect of loaded filter, and then on this loaded filter, adopt the jackstone that self do not have the venting and water permeable performance, grout correlation techniques such as stone, cast in place concrete plate or prefabricated trellis concrete block and carry out bank protection.
Owing to natural stone field that above bank protection technology adopted, grout materials itself such as stone, cast in place concrete plate or precast concrete segment and do not possess the venting and water permeable performance, so the draining of former mound side slope or hillside the inside can only realize by means of the gap that forms between these materials or by some steam vents that inside is provided with, thereby reach the purpose of side slope venting and water permeable.But the consequence of bringing thus is that wave can be invaded fiercely along steam vent and gap, makes former domatic mound material constantly be subjected to the erosion of washing away of wave; Meanwhile, because the rapid variation of water level, make the phenomenon that mound occurs being sucked out along drain hole and gap, soil particle runs off, the domatic a series of problems such as pick of being washed thereby cause.Particularly for the water-storage side slope of reservoir, rivers and creeks dykes and dams etc., because the change of water level makes the side slope of reservoir, dykes and dams be subjected to the souring of recirculated water, along with piling the loss of banketing in domatic, displacement increases, mound is easy to focus on certain a part of steam vent or gap location directly is sucked out, thereby further adds the danger that macrodome is washed pick.Consider this point; existing cast in place concrete plate slope protecting technique; also can lay the geotextiles of certain width at gap location in advance; utilize its strainability and drainage performance; reduce osmotic pressure and protect bed course; but this geotextiles lost efficacy easily, needed regular replacing, made troubles for the management and the maintenance of engineering.Generally speaking, the anti-filter effect of existing reservoir side slope bank protection technology does not reach the requirement that solves root problem.
In addition, up to now, design still to consider during water-storage side slope levee body more than needed highly must design very big this problem, this is because when wave impact is domatic, the direction of advance of wave can upwards change along shore protection, the kinetic energy that wave is held will be converted to potential energy, and the height that certainly will cause wave to climb increases, so the more than needed of levee body highly must be built very greatly.
Summary of the invention
The construction method that the purpose of this invention is to provide a kind of ventilating permeable ecological concrete water-storage side slope.Make it have bank protection ability preferably, need not on mound is domatic, cover the material that sand stone layer, geotextiles etc. have anti-filter effect, self just have good reverse filter effect, can prevent that former domatic mound is sucked out the phenomenon of washing pick and takes place; Simultaneously, make it have wave absorption performance preferably, can effectively reduce the height more than needed of water-storage side slope.
Technical scheme of the present invention is:
On the heap that is subjected to wave impact bankets the material water-storage side slope, the ventilating permeable ecological concrete layer that one deck is made of jointly granular gather materials, bond this granular cement-hydrate that gathers materials and the continuous gap between granular gathering materials is set.
Described granular difference of gathering materials according to particle diameter is divided into coarse aggregate and fines, wherein coarse aggregate size is 2.5～25mm, the fines particle diameter is 0.15～10mm, slightly, the quality mixture ratio of fines is 3: 1～20: 1, both account for 78%～85.5% of ventilating permeable ecological concrete gross mass, and following match ratio is mass percent; Gather materials and cement-hydrate mixes at concrete mixer granular, and then pour into a mould toward the position that will pour into a mould, hydrated product obtains the ventilating permeable ecological concrete layer after hardening.
Described cement-hydrate can be the hydrated product of portland cement and water, or includes the hydrated product of the mixture of portland cement, water, cement modification agent and air entraining agent, and its water/binder ratio is controlled between 0.4～0.25.
The volume of cement and water accounts for 12.5%～20% of eco-concrete total amount; Cement modification agent addition is 1.4%～2.3% of an eco-concrete total amount, in order to promote the adhesion stress of solidifying or improve cement of cement composition; The air entraining agent addition is 0.0015%～0.003% of an eco-concrete total amount, in order to improve the concrete durability of ventilating permeable, frost resistance, improves freezing-thawing cycles, and air entraining agent can adopt the AE agent.
Contrast through overtesting, the volume of cement and water is preferable selection in the technical solution of the present invention, because in making ventilating permeable concrete process, if the volume of cement and water is less than granular 10% o'clock of gathering materials, the quantity of the cement-hydrate of bonding usefulness just seems less between then gathering materials, make the bonding between gathering materials become incomplete or insufficient, thereby can only make the concrete that mechanical strength is lower, can not satisfy requirement of strength.If the volume of cement and water surpasses 30% of the weight of gathering materials, though the adhesion stress between gathering materials is very strong, it is also very abundant to bond, but cause the continuous shape space between gathering materials to be difficult to form, can only make some have independent space such as bubble and lost the venting and water permeable performance, with the more approaching concrete of ordinary concrete performance, can not satisfy the ventilating permeable requirement.
The present invention also has following advantage:
(1) water-storage side slope that adopts the inventive method to build, when it was subjected to wave impact, wave can invade in the continuous shape space of ventilating permeable ecological concrete layer and go.In continuous shape space, wave constantly collides by the pahtfinder hard in the space time each other, adds the rubbing action of upper pathway wall, makes the flow velocity of wave decline to a great extent.In addition, on slope surface, the opening part in continuity space presents the convex-concave shape, and this makes wave reflect when this collides, thereby has changed the flow direction of wave, and its size has also been weakened.Therefore,, make height that wave rises to upper punch step-down significantly, thereby can reduce the height more than needed of water-storage side slope, reduce construction cost according to the such wave absorption principle and the effect of generation thereof.
(2) owing to above-mentioned wave absorbing function, the up and down speed of invading the water of domatic inside can become slow especially, makes the up and down amplitude that infilters the water in the domatic inside compare with the former amplitude of wave and seems very little, thereby improved the bank protection ability.
(3) adopt the granular ventilating permeable concrete of making that gathers materials that contains fines to carry out bank protection, its anti-performance of filtering also is improved.Because when being controlled at the venting and water permeable performance in certain scope, it is slow especially that the flow velocity of percolating water can become, like this, for domatic mound fine grained, its active force that is subjected to water can become very small.Thus, even be subjected to big wave impact or water level generation variation sharp, the danger that the fine grained of domatic soil-shifting runs off is also minimum, and inner mound just can not be sucked out and wash pick.
Description of drawings
Fig. 1 is the sectional model figure of the ventilating permeable concrete structure in the inventive method.
Fig. 2 is the reservoir of the inventive method construction or the dykes and dams profile in rivers and creeks.
The side slope that Fig. 3 the inventive method is built suppresses the contrast effect coordinate diagram that wave raises up.
Sequence number among the figure: 1. granular gathering materials; 2. cement-hydrate; 3. continuous gap; 4. dykes and dams; 5. pile the material that bankets; 6. ventilating permeable concrete; 7. domatic.
The specific embodiment
As shown in Figure 1, comprise in the ventilating permeable concrete structure that the inventive method obtains granularly gather materials 1, this granular cement-hydrate that gathers materials 2 and continuous gap between granular gathering materials 3 bond.
As shown in Figure 2, the water-storage side slope of the reservoir of building with the inventive method or the dykes and dams 4 in rivers and creeks, its structure is made of banket material 5, ventilating permeable concrete 6 of heap on the trapezoidal cross-section.
In addition, have better anti-filter effect, can also in the concrete space of the ventilating permeable that has hardened, inject fine sand, form an integral body in order to make the ventilating permeable concrete.In such cases, thus interstitial channels can't blockage phenomenon reduces coefficient of permeability.Compare with technology such as existing use stone material, its simple duration of constructing is short, and is easy to maintenance management after the construction.
The concrete prescription of the ventilating permeable of the embodiment of the invention is as shown in table 1, has listed the mass percent of various materials and eco-concrete among two embodiment in the table, has also added the prescription of the contrast scheme that does not contain fines in the table:
Table 1
| Embodiment | Coarse aggregate (grain compositions such as rubble or cobble: 2.5～25mm) | Fines (river sand, sea sand, grain compositions such as stone sand: 0.15～10mm) | Cement (Portland cement) | Cement modification agent (additive SR-3) | Cement modification agent (high efficiency water reducing agent) | Air entraining agent (AE agent) | Water |
| Embodiment one | 58％～70％ | 12％～20％ | 12％～ 15.5％ | 2.1％～ 2.3％ | Do not have | 0.002％～ 0.003％ | 3.5％～ 4.6％ |
| Embodiment two | 72％～81％ | 4.5％～12％ | 8.5％～ 12.5％ | 1.4％～ 2.1％ | Do not have | 0.0015％ ～0.002％ | 2.5％～ 3.5％ |
| The prescription of alternative | 74％～81％ | Do not have | 16％～22％ | Do not have | 0.10％～ 0.30％ | 0.0015％ ～0.003％ | 2.5％～ 3.7％ |
In the table 1 additive SR-3 is that Zhenjiang Jiujiu Ecological Material Co., Ltd. produces is the eco-concrete special inorganic matter additive of main component with calcium carbonate.The correction data of every index of the ventilating permeable concrete of listed embodiment and alternative and ordinary concrete is as shown in table 2 in the table 1:
Table 2
| Testing index | Alternative | Embodiment one | Embodiment two | Ordinary concrete |
| Compressive strength (measuring after 28 days) | 10～15MPa | 18～25MPa | 20～25MPa | 13.5-24.0MPa |
| The frost resistance test | Below 30 circulations | More than 80 circulations | More than 80 circulations | 60-150 circulation |
| Coefficient of permeability (constant water level method) | 5.0cm/s more than | 0.1cm/s more than | 0.1cm/s more than | 1.0×10 -9～5.0× 10 -7cm/s |
| Reverse filter effect | Anti-filter weak effect | Anti-filter effect is remarkable | Anti-filter effect is remarkable | There is not this function |
| Void content | More than 25% | 20±5％ | 20±5％ | 3％～4％ |
| Unit weight | 1.8t/m 3 | 2.0t/m 3 | 2.0t/m 3 | 2.3t/m 3 |
| Curing condition | Stream curing | Natural curing | Natural curing | The curing box maintenance |
By table 2 result as can be known; the ventilating permeable concrete of two kinds of schemes in the present embodiment; performance is about the same; compare with general concrete and to have identical compressive strength, frost resistance; and its coefficient of permeability is controlled at more than the 0.1cm/s; void content is than high many of the general concrete that does not have water permeability, can play for the various domatic mounds and the protective effect of cutting soil.
Carry out bank protection and adopt the skill and technique of the cast-in-place concrete plate bank protection of prior art to carry out loss (piping) test of wave absorption test and native sand at the scheme that adopts the foregoing description one.
One, wave absorption test:
Adopt the method for piling the material that bankets to build up artificial water channel, its dykes and dams width 0.9m, height 0.8m, its gradient of domatic 7 is 1: 2 as shown in Figure 2.On domatic 7, by the prescription of the above embodiments one, building thickness is the ventilating permeable concrete of 120mm at this.Utilize wave simulator then, fabrication cycle is that 1.6～1.8s/ returns, and wave height is the wave of 3.0～10.0cm, impacts facing to the venting and water permeable layer of concrete on domatic 7, measures the height that raises up of wave.
Comparative Examples is for adopting existing slope protecting technique scheme, poured in place concrete, copy its structure, be made into the concrete shelf-like, cover domatic on, and be provided with between drain hole and the shelf in the concrete shelf surface and form some minim gaps and the embodiment of the invention is tested simultaneously, measure the height that raises up of wave.
The wave absorption result of the test as shown in Figure 3.As can be seen from Figure 3, utilize bank protection shown in embodiment of the present invention, the power of wave, just no matter, the effect of its wave absorption is very significant.
Two, the loss of native sand (piping) test:
Domatic based on the test of above wave absorption observed banket sucking-off (the washing pick) phenomenon of material of heap, and in depth observed the concrete anti-filter effect of ventilating permeable.Its result: though passed through one hour impact, for domatic by what embodiment constituted, the heap fill material shows no sign of and is sucked out (washing pick) phenomenon.By contrast, be the bank protection face that the shelf concrete constitutes by original revetment design scheme in the Comparative Examples, after the wave impact first time, the phenomenon of pick has just taken place to be sucked out or to wash in the mound in domatic, and the height that little by little raises up with wave is as the upper end starting point, along the domatic little water route that has formed multiple-limb under the concrete shelf.
Claims (4)
1, a kind of construction method of ventilating permeable ecological concrete water-storage side slope, it is characterized in that: on the heap that is subjected to wave impact bankets the material water-storage side slope, the ventilating permeable ecological concrete layer that one deck is made of jointly the cement-hydrate and the continuous gap between the granular aggregate of granular aggregate, this granular aggregate that bonds is set.
2, the construction method of ventilating permeable ecological concrete water-storage side slope according to claim 1, it is characterized in that: the granular aggregate that is comprised in the ventilating permeable ecological concrete layer is divided into coarse aggregate and fines according to the difference of particle diameter, wherein coarse aggregate size is 2.5～25mm, the fines particle diameter is 0.15～10mm, slightly, the quality mixture ratio of fines is 3: 1～20: 1, both account for 78%～85.5% of eco-concrete gross mass.
3, the construction method of ventilating permeable ecological concrete water-storage side slope according to claim 2, it is characterized in that: described cement-hydrate is the hydrated product of portland cement and water, its water/binder ratio is controlled between 0.4～0.25, and the volume of cement and water accounts for 12.5%～20% of eco-concrete gross mass.
4, the construction method of ventilating permeable ecological concrete water-storage side slope according to claim 2, it is characterized in that: described cement-hydrate is the hydrated product of the mixture of portland cement, water, cement modification agent, its water/binder ratio is controlled between 0.4～0.25, the volume of cement and water accounts for 12.5%～20% of eco-concrete gross mass, cement modification agent addition is 1.4%～2.3% of an eco-concrete gross mass, and the air entraining agent addition is 0.0015%～0.003% of an eco-concrete total amount.
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| CN 200510040877 CN1891911A (en) | 2005-07-04 | 2005-07-04 | Method for constructing ventilating permeable ecological concrete water-storage side slope |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154998A (en) * | 2011-04-06 | 2011-08-17 | 云南瑞邦环境科技有限公司 | Air-permeable and water-permeable ecological concrete dike dam |
| CN107056329A (en) * | 2017-01-23 | 2017-08-18 | 徐咏梅 | Plant-growing type eco-concrete high gradient slope structure |
| CN108892527A (en) * | 2018-07-12 | 2018-11-27 | 山东农业大学 | Pervious concrete loaded filter, preparation method and protective slope structure for slope protection behind dam |
| CN109944212A (en) * | 2019-03-22 | 2019-06-28 | 盐城工学院 | Ecological porous type shore protection |
| CN110424338A (en) * | 2019-08-27 | 2019-11-08 | 中水北方勘测设计研究有限责任公司 | The section partitioned organization of concrete face rockfill dam |
| CN112287612A (en) * | 2020-10-20 | 2021-01-29 | 长安大学 | Water-rich rock freezing-thawing cycle particle flow numerical simulation method |
-
2005
- 2005-07-04 CN CN 200510040877 patent/CN1891911A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154998A (en) * | 2011-04-06 | 2011-08-17 | 云南瑞邦环境科技有限公司 | Air-permeable and water-permeable ecological concrete dike dam |
| CN107056329A (en) * | 2017-01-23 | 2017-08-18 | 徐咏梅 | Plant-growing type eco-concrete high gradient slope structure |
| CN108892527A (en) * | 2018-07-12 | 2018-11-27 | 山东农业大学 | Pervious concrete loaded filter, preparation method and protective slope structure for slope protection behind dam |
| CN109944212A (en) * | 2019-03-22 | 2019-06-28 | 盐城工学院 | Ecological porous type shore protection |
| CN110424338A (en) * | 2019-08-27 | 2019-11-08 | 中水北方勘测设计研究有限责任公司 | The section partitioned organization of concrete face rockfill dam |
| CN112287612A (en) * | 2020-10-20 | 2021-01-29 | 长安大学 | Water-rich rock freezing-thawing cycle particle flow numerical simulation method |
| CN112287612B (en) * | 2020-10-20 | 2021-11-30 | 长安大学 | Water-rich rock freezing-thawing cycle particle flow numerical simulation method |
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Open date: 20070110 |