CN111705819A - Construction method for ecological slope protection of plant-growing concrete - Google Patents
Construction method for ecological slope protection of plant-growing concrete Download PDFInfo
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- CN111705819A CN111705819A CN202010612421.5A CN202010612421A CN111705819A CN 111705819 A CN111705819 A CN 111705819A CN 202010612421 A CN202010612421 A CN 202010612421A CN 111705819 A CN111705819 A CN 111705819A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G31/00—Soilless cultivation, e.g. hydroponics
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
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- Cultivation Of Plants (AREA)
Abstract
The invention discloses a construction method of ecological slope protection of plant-growing concrete, comprising the following steps of cleaning a slope surface, injecting recycled concrete into a charging hopper, moving the charging hopper into a cabinet frame through a crane for pouring, wherein the thickness of the poured recycled concrete is 5-8 cm; the recycled concrete comprises low-alkali cement, recycled aggregate and water; the recycled aggregate is formed by mixing 5-31.5mm and 20-40mm of particle size; after the concrete is concreted, paving planting soil on the surface of the concrete after the concrete is concreted and broadleaf paspalum is sowed on the surface of the concrete, and covering non-woven fabrics on the surface of the planting soil, wherein the planting soil is prepared by mixing the following components in percentage by mass of 3.5-4.5: 1, uniformly mixing the surface soil and the nutrient soil, and irrigating and fertilizing after planting the broadleaf paspalum. The slope construction method provided by the invention not only has the function of slope reinforcement and prevention of water and soil loss, but also has the advantages that the recycled concrete has a porous structure and a low-alkalinity environment, can adapt to the growth of green plants, and has the effects of greening environment and ecological restoration.
Description
Technical Field
The invention belongs to the technical field of ecological concrete, and particularly relates to a construction method of a vegetation concrete ecological slope protection.
Background
With the rapid development of urbanization construction, the urban ground is covered and hardened by concrete in a large area, and a large amount of heat is absorbed and radiated in sunshine, which is one of the important reasons for causing the urban 'heat island effect'. Meanwhile, the traditional concrete is a material with high compactness, lacks of water permeability and air permeability and cannot grow plants. After the urban ground is covered with concrete in a large area, the area available for greening is reduced, and dust is more easily generated to deteriorate the air quality; the noise is reflected by the concrete for many times, and the pollution is more obvious. In addition, the color of the concrete is dark, and the visual effects of hardness and coldness are given to people.
The plant-growing concrete is a novel environment-friendly material consisting of sand-free porous concrete, planting soil and the like, has the functions of concrete and environment regulation, realizes greening, dust prevention and noise reduction, and meets the ecological requirement. The vegetation concrete is used for the two sides of roads, the slope protection of expressways and central isolation belts of cities, the slope protection at waterside, parking lots at roofs and the like, can increase the water and air permeability of the surface of a concrete material, improve the wet and heat exchange capacity, reduce the surface temperature of the concrete material, increase the green space of the cities, reduce the urban heat island effect, adjust the living emotion of people, has the function of absorbing noise and dust, plays a positive role in the ecological balance of urban climate, can improve the living environment, and has very outstanding social benefit and ecological benefit.
With the vigorous development of the transportation industry, the types of pollutants in the road runoff are more complex, the pollution load is more serious, and the common vegetation type concrete can not meet the requirement of current road runoff pollution treatment. The road slope protection form is mostly hard full-paved or simple grass planting protection. The hardness degree of the protective side slope is too high, so that the landscape effect is poor. Simple grass planting has small slope protection effect, and slope soil loss is easily caused by rain wash. Therefore, the construction method of the plant growing concrete with the functions of protecting the slope and the bank, controlling water and soil loss and beautifying the ecology is provided, and the construction method has important significance for promoting urban construction.
Disclosure of Invention
The invention aims to provide a construction method of a plant-growing concrete ecological slope protection. The slope construction method provided by the invention takes low-alkali cement, recycled aggregate, planting soil and the like as raw materials, not only has the function of reinforcing the slope and preventing water and soil loss, but also has a porous structure and a low-alkalinity environment, can adapt to the growth of green plants, has the effects of greening the environment and ecological restoration, and has good economic, social and ecological benefits. .
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a construction method of ecological slope protection of plant-growing concrete comprises the following steps:
s1, removing weeds, fallen leaves and dry branches, floating soil and pumice on the slope, injecting recycled concrete into a charging hopper, moving the charging hopper into a cabinet frame through a crane for pouring, wherein the thickness of the poured recycled concrete is 5-8 cm, and a construction joint is reserved every 5m in the pouring process;
the recycled concrete comprises low-alkali cement, recycled aggregate and water; the dosage of the recycled concrete low-alkali cement in each formula is 300-400kg, the dosage of water is 100-150kg, the dosage of the recycled aggregate is 1400-1600kg, and the water-cement ratio is 0.26-0.35; the recycled aggregate is formed by mixing 5-31.5mm and 20-40mm of particle size;
s2, after the recycled concrete is poured and solidified, sowing paspalum distichum on the surface of the concrete, wherein the row spacing is 30-50 cm, and the sowing amount per mu is 0.75-1.0 kg;
s3, paving planting soil on the surface of the planting soil during sowing, covering non-woven fabrics on the surface of the planting soil, controlling the distance between the non-woven fabrics and the slope surface to be 0.1-0.3m, and sewing and lapping the joints for 15 cm; the planting soil is prepared from the following components in percentage by mass of 3.5-4.5: 1, mixing the surface soil and the nutrient soil uniformly;
s4, watering the broadleaf paspalum in the morning and at the evening for 1 time respectively in the hot and dry season every 5 to 7 days until the roots are moistened to 10 to 15cm, and fertilizing once every two to three months.
Further, the recycled aggregate is also subjected to modification treatment; the specific modification steps are as follows: and (3) putting the recycled aggregate into a citric acid solution, soaking for 3-6h, cleaning with water, then using a modified solution prepared from aluminium dihydrogen tripolyphosphate, mica powder and dimethyl silicone alkyl cage-shaped polysilsesquioxane, wetting the recycled aggregate, and airing to finish the modification of the recycled aggregate.
Further, the mass percentage of the modified solution is 10-20%.
Further, the mass ratio of the aluminum dihydrogen tripolyphosphate to the mica powder to the dimethyl silane cage-shaped polysilsesquioxane is 3-5:10-15: 1-3.
Further, the mass concentration of the citric acid solution is 5-10%.
Further, the surface soil comprises one or more of red soil, red soil and brick red soil.
Further, the slope surface is 1: 1-1.5.
Further, the volume ratio of the recycled aggregate with the particle size of 5-31.5mm and 20-40mm is 1: 1-2.
Further, the casting is completed within 20-60 minutes.
Compared with the prior art, the invention has the advantages and beneficial effects that:
1. the slope construction method provided by the invention takes low-alkali cement, recycled aggregate, planting soil and the like as raw materials, not only has the function of reinforcing the slope and preventing water and soil loss, but also has a porous structure and a low-alkalinity environment, can adapt to the growth of green plants, has the effects of greening the environment and ecological restoration, and has good economic, social and ecological benefits.
2. The invention adopts the recycled aggregate with different grain diameters, can ensure that the recycled concrete has good porosity, controls the porosity between 40 and 45 percent, and can ensure the strength of the side slope.
3. According to the method, the recycled aggregate is soaked by citric acid, and then is subjected to aluminium dihydrogen tripolyphosphate, mica powder and dimethyl silicone alkyl cage-shaped polysilsesquioxane, so that the alkalinity of recycled concrete can be reduced, the pH value is 7.5-8.5, the method is more suitable for the growth of plants, the strength of the recycled aggregate can be improved, the recycled aggregate can be changed into valuable, the resource recycling is realized, and the construction cost for repairing the side slope is reduced.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Example 1
The embodiment is applied to a certain project in Guangxi Shang forest county, and the project takes bank protection and water and soil loss treatment as main tasks and aims at beautifying cities, commercial development and river ecological treatment. Sightseeing streets are to be built on the two sides of the channel, the road clear width is 8m on one side, the road clear width is 6m on the other side, and slope protection on the two sides of the road is carried out by adopting the following method.
The construction method of the ecological slope protection of the plant-growing concrete comprises the following steps:
and S1, removing the vegetation combination part, removing the contact surface of the original side slope above the opening line of the slope surface, removing the width of 1.0-1.5 m, using the part as the vegetation combination part which is the transition part between engineering and the original slope surface, firstly removing impurities such as weeds, fallen leaves and dry branches, floating soil, pumice and the like on the slope surface, wherein the slope surface has a slope rate of 1:1.5, pouring recycled concrete into a charging hopper, moving the recycled concrete into a cabinet frame through a crane for pouring, and leaving a construction joint every 5m in the pouring process, wherein the thickness of the recycled concrete is 7 cm.
The pouring is finished within one hour, and if the temperature is above 25 ℃, the pouring is finished within 30-40 minutes.
In the recycled concrete, the consumption of the low-alkali cement of each side of the recycled concrete is 360kg, the consumption of water is 125kg, and the consumption of recycled aggregate is 1546 kg; the recycled aggregate is formed by mixing 5-31.5mm and 20-40mm of particle size according to the volume ratio of 1: 2.
The recycled aggregate is also subjected to modification treatment; the specific modification steps are as follows: the method comprises the steps of putting the recycled aggregate into a citric acid solution with the mass concentration of 10%, soaking for 5 hours, cleaning with water, preparing a modified solution from aluminium dihydrogen tripolyphosphate, mica powder and dimethyl silicone alkyl cage-shaped polysilsesquioxane with the mass ratio of 1:4:1, wetting the recycled aggregate, and airing to finish the modification of the recycled aggregate, wherein the mass concentration of the modified solution is 15%.
And S2, after the concrete is concreted, sowing paspalum latifolium on the surface of the concrete, wherein the sowing time is late April, the row spacing is 40-50 cm, and the sowing amount per mu is 0.85 kg.
S3, paving planting soil on the surface of the planting soil during sowing, covering non-woven fabrics on the surface of the planting soil, controlling the distance between the non-woven fabrics and the slope surface to be 0.1-0.3m, and sewing and lapping the joints for 15 cm; the planting soil is prepared from the following components in percentage by mass: 1 and mixing the earth surface soil and the nutrient soil uniformly. The surface soil consists of red soil and brick red soil in a volume ratio of 1:3, and the nutrient soil is commercially available nutrient soil.
S4, watering the broadleaf paspalum in the morning and at the evening for 1 time respectively in the high-temperature and dry season after planting, wherein the wet roots reach 10-15cm, watering in other seasons to protect the soil roots to have certain humidity, and fertilizing once every two to three months. The fertilizer for planting grass is generally mainly applied with nitrogen fertilizer and is also applied with compound fertilizer. The fertilizing amount is preferably 8-12 kg per mu.
The recycled concrete provided in this example had a void fraction of 43%, a strength of 23MPa, and a pH of about 7.5. The statistical germination rate reaches 78.6% after seeding the broadleaf paspalum after 15 days, the balance average plant height reaches 23.4cm after seeding, and the root length reaches 13.2 cm.
Example 2
The embodiment is applied to slope protection of two banks of a certain engineering road in Guangxi Guilin City. The construction method of the ecological slope protection of the plant-growing concrete comprises the following steps:
and S1, removing the vegetation combination part, removing the contact surface of the original side slope above the opening line of the slope surface, removing the width of 1.0-1.5 m, using the part as the vegetation combination part which is the transition part between engineering and the original slope surface, firstly removing impurities such as weeds, fallen leaves and dry branches, floating soil, pumice and the like on the slope surface, wherein the slope surface has a slope ratio of 1:1, pouring the recycled concrete into a charging hopper, moving the recycled concrete into a cabinet frame through a crane for pouring, and leaving a construction joint every 5m in the pouring process, wherein the thickness of the poured recycled concrete is 8 cm.
The pouring is finished within one hour, and if the temperature is above 25 ℃, the pouring is finished within 20-40 minutes.
In the recycled concrete, the consumption of the low-alkali cement of each side of the recycled concrete is 400kg, the consumption of water is 140kg, and the consumption of recycled aggregate is 1546 kg; the recycled aggregate is formed by mixing 5-31.5mm and 20-40mm of particle size according to the volume ratio of 1:1.
The recycled aggregate is also subjected to modification treatment; the specific modification steps are as follows: the method comprises the steps of putting the recycled aggregate into a citric acid solution with the mass concentration of 8%, soaking for 6 hours, cleaning with water, preparing a modified solution from aluminium dihydrogen tripolyphosphate, mica powder and dimethyl silicone alkyl cage-shaped polysilsesquioxane in a mass ratio of 2:12:1, wetting the recycled aggregate, and airing to finish the modification of the recycled aggregate, wherein the mass concentration of the modified solution is 18%.
And S2, after the concrete is concreted, sowing paspalum latifolium on the surface of the concrete, wherein the sowing time is late April, the row spacing is 40-50 cm, and the sowing amount per mu is 0.90 kg.
S3, paving planting soil on the surface of the planting soil during sowing, covering non-woven fabrics on the surface of the planting soil, controlling the distance between the non-woven fabrics and the slope surface to be 0.1-0.3m, and sewing and lapping the joints for 15 cm; the planting soil is prepared from the following components in percentage by mass of 4.5: 1 and the nutrient soil is obtained by uniformly mixing the red soil surface soil and the nutrient soil, wherein the nutrient soil is commercially available nutrient soil.
S4, watering the broadleaf paspalum in the morning and at the evening for 1 time respectively in the high-temperature and dry season after planting, wherein the wet roots reach 10-15cm, watering in other seasons to protect the soil roots to have certain humidity, and fertilizing once every two to three months. The fertilizer for planting grass is generally mainly applied with nitrogen fertilizer and is also applied with compound fertilizer. The fertilizing amount is preferably 8-12 kg per mu.
The recycled concrete provided in this example had a void fraction of 41.5%, a strength of 19.6MPa, and a pH of about 8.0. The statistical germination rate reaches 73.1% after seeding the broadleaf paspalum after 15 days, the plant height reaches 24.9cm after 30 balances, and the root length reaches 10.7 cm.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and such substitutions and modifications are to be considered as within the scope of the invention.
Claims (9)
1. A construction method for ecological slope protection of plant-growing concrete is characterized by comprising the following steps: the method comprises the following steps:
s1, removing weeds, fallen leaves and dry branches, floating soil and pumice on the slope, injecting recycled concrete into a charging hopper, moving the charging hopper into a cabinet frame through a crane for pouring, wherein the thickness of the poured recycled concrete is 5-8 cm, and a construction joint is reserved every 5m in the pouring process;
the recycled concrete comprises low-alkali cement, recycled aggregate and water; the dosage of the recycled concrete low-alkali cement in each formula is 300-400kg, the dosage of water is 100-150kg, the dosage of the recycled aggregate is 1400-1600kg, and the water-cement ratio is 0.26-0.35; the recycled aggregate is formed by mixing 5-31.5mm and 20-40mm of particle size;
s2, after the recycled concrete is poured and solidified, sowing paspalum distichum on the surface of the concrete, wherein the row spacing is 30-50 cm, and the sowing amount per mu is 0.75-1.0 kg;
s3, paving planting soil on the surface of the planting soil during sowing, covering non-woven fabrics on the surface of the planting soil, controlling the distance between the non-woven fabrics and the slope surface to be 0.1-0.3m, and sewing and lapping the joints for 15 cm; the planting soil is prepared from the following components in percentage by mass of 3.5-4.5: 1, mixing the surface soil and the nutrient soil uniformly;
s4, watering the broadleaf paspalum in the morning and at the evening for 1 time respectively in the hot and dry season every 5 to 7 days until the roots are moistened to 10 to 15cm, and fertilizing once every two to three months.
2. The construction method of ecological slope protection of plant-growing concrete according to claim 1, characterized in that: the recycled aggregate is also subjected to modification treatment; the specific modification steps are as follows: and (3) putting the recycled aggregate into a citric acid solution, soaking for 3-6h, cleaning with water, then using a modified solution prepared from aluminium dihydrogen tripolyphosphate, mica powder and dimethyl silicone alkyl cage-shaped polysilsesquioxane, wetting the recycled aggregate, and airing to finish the modification of the recycled aggregate.
3. The construction method of ecological slope protection of plant-growing concrete according to claim 2, characterized in that: the mass percentage of the modified solution is 10-20%.
4. The construction method of ecological slope protection of plant-growing concrete according to claim 3, characterized in that: the mass ratio of the aluminum dihydrogen tripolyphosphate to the mica powder to the dimethyl silane cage-shaped polysilsesquioxane is 3-5:10-15: 1-3.
5. The construction method of ecological slope protection of plant-growing concrete according to claim 2, characterized in that: the mass concentration of the citric acid solution is 5-10%.
6. The construction method of ecological slope protection of plant-growing concrete according to claim 1, characterized in that: the surface soil comprises one or more of red soil, red soil and brick red soil.
7. The construction method of ecological slope protection of plant-growing concrete according to claim 1, characterized in that: the slope surface has a slope rate of 1: 1-1.5.
8. The construction method of ecological slope protection of plant-growing concrete according to claim 1, characterized in that: the volume ratio of the recycled aggregate with the particle size of 5-31.5mm to 20-40mm is 1: 1-2.
9. The construction method of ecological slope protection of plant-growing concrete according to claim 1, characterized in that: the pouring is completed within 20-60 minutes.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116102326A (en) * | 2023-01-28 | 2023-05-12 | 深圳市为海建材有限公司 | Preparation method of plant-growing concrete and plant-growing concrete |
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Application publication date: 20200925 |