CN112544350A - Construction method for protecting side slope of ecological grass planting roadbed in geocell - Google Patents
Construction method for protecting side slope of ecological grass planting roadbed in geocell Download PDFInfo
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- CN112544350A CN112544350A CN202011380147.XA CN202011380147A CN112544350A CN 112544350 A CN112544350 A CN 112544350A CN 202011380147 A CN202011380147 A CN 202011380147A CN 112544350 A CN112544350 A CN 112544350A
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- 244000025254 Cannabis sativa Species 0.000 title claims abstract description 45
- 238000010276 construction Methods 0.000 title claims abstract description 43
- 239000002689 soil Substances 0.000 claims abstract description 50
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 238000004873 anchoring Methods 0.000 claims abstract description 6
- 239000003337 fertilizer Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000010899 nucleation Methods 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 238000009331 sowing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004746 geotextile Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Botany (AREA)
- Environmental Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Cultivation Of Plants (AREA)
Abstract
A construction method for protecting the slope of ecological grass planting roadbed in geocell. The construction method comprises the steps of firstly paving a layer of 25 cm-thick planting soil on a constructed roadbed side slope, installing a positioning anchor rod, paving a high-strength micro-pile earthwork grid chamber on the planting soil, anchoring the earthwork grid chamber at a micro-pile position and the roadbed side slope by using the positioning anchor rod with a hook, filling 25cm of planting soil on the earthwork grid chamber, and spraying grass seeds. The method is suitable for filling subgrade slopes with heights larger than 4 m. The construction application can generate remarkable economic and social benefits.
Description
Technical Field
The invention relates to a construction method for protecting a side slope of an ecological grass planting roadbed in a geocell.
Background
With the rapid development of economy and traffic demands in China, a large number of express roads and highways are being actively constructed, particularly in western plateau areas, and the height of the general roadbed slopes is higher due to topography and landform reasons. The roadbed slope is an important component of road engineering, not only needs to play the self service and function, but also needs to be integrated into the surrounding environment and close to the nature, so that the ecological slope protection technology is widely concerned by people.
Conventional roadbed side slope generally adopts grout rubble skeleton bank protection or reinforced concrete anchor rod frame roof beam bank protection such as arch, square grid, and the construction cycle is long, and the manual work and the material that consume are many, and are with high costs, and have and certainly obtain the potential safety hazard, and is uncoordinated with the surrounding environment.
Disclosure of Invention
The invention provides a slope protection construction method of a geocell ecological grass planting roadbed, which solves the defects of the prior art, has high construction speed, low cost, safety and environmental protection, good slope stability and more harmony with the surrounding environment, is suitable for filling roadbed slopes with the height of more than 4m, and can organize construction quickly, safely and economically, and particularly relates to a roadbed slope protection construction method which has higher roadbed slopes and is inconvenient in material transportation.
In order to solve the technical problem, the invention provides a construction method for protecting the slope of an ecological grass planting roadbed in a geocell. In the invention, the earthwork standard room and the anchor rod, the planting soil and the side slope form an effective whole to stabilize the side slope in the earlier stage, and the root system of the grass seeds is pricked into the side slope to improve the stability of the side slope before the earthwork standard room is aged and after the grass seeds are completely grown.
The method specifically comprises the following steps:
a. leveling slope surfaces: removing loose stones and sand on the slope surface, leveling the concave part, and checking the flatness, wherein the flatness needs to meet the requirements that the transverse flatness is not more than 5cm and the longitudinal flatness is not more than 10 cm;
b. setting a drainage system:
drainage ditches are arranged at the top of the slope, the bottom of the slope and the platform of the side slope of the roadbed, and a rapid trough is arranged among the micro-pile soil engineering grid chambers among different units;
c. installing a positioning anchor rod:
before the construction of the geocell, firstly, the construction of a positioning anchor rod is carried out, the position of the anchor rod is fixed according to the size of the geocell and the fineness of the geocell, the anchor rod is vertical to the slope, and the length of the exposed part of the anchor rod ensures the installation requirement of the geocell;
d. installing the geocell:
firstly, laying a layer of planting soil on the roadbed side slope, then laying geocell, filling the planting soil in the geocell, when the geocell is laid, opening the geocell to the slope bottom along the top of the slope to reach the specification size, and connecting the two geocell units by using an anchor rod;
e. spraying and planting grass:
uniformly spreading grass seeds in a soil-covered earthwork grid chamber from top to bottom, wherein the sowing quantity of the grass seeds is not less than 9 g/square meter, spraying the grass seeds, mixed fertilizer, water-retaining agent, adhesive and fiber onto the foreign soil, covering earthwork fabric on the sprayed side slope, and removing the covered earthwork fabric after the grass grows out for 3-5 cm.
In this embodiment, the geocell is a micro-pile geocell.
In the embodiment, the anchor rod adopts phi 12mm thread steel bars, and when the side slope is a stone side slope, the anchor rod is anchored on the side slope by adopting air drill drilling and then using an anchoring agent.
In this embodiment, the exposed portion of the anchor rod is not higher than the geocell.
In the present embodiment, the planting soil has a thickness of 25 cm.
In the embodiment, in the step d, the planting soil laid firstly is selected from the original surface soil of the project or the soil of the nearby agricultural field, crushed and sieved, and compacted by a small-sized hand-pushed vibrating tamper or a gray shovel to ensure the compactness of the slope surface filler;
and c, compacting the planting soil filled in the geocell, spraying water on the slope surface to enable the loose planting soil to be settled and compacted, and filling fine soil into the slope surface after the surface is air-dried to meet the thickness requirement.
In the embodiment, in the step e, the fertilizer is applied within 48 hours before spray-seeding, and the using amount of the fertilizer is not less than 7kg per square meter.
In this embodiment, after step e, maintenance work of watering and fertilizing is performed.
In the embodiment, the watering is carried out in a mist form in the morning or evening, the watering speed is lower than the water absorption speed of the soil, and the watering is continued until the soil finishes infiltrating by 2.5-5 cm.
The advantages of the invention are analyzed as follows:
1. the construction method for protecting the side slope of the ecological grass planting roadbed in the geocell has less construction procedures, only simple procedures of laying planting soil, installing U-shaped positioning anchor rods, laying geocell, spraying grass seeds and the like are needed, all the procedures can be implemented by only 2-3 workers, the construction speed is high, and 100 square meters per person can be constructed every day.
2. The principle of the slope protection construction method of the ecological grass planting roadbed of the geocell is that three-dimensional reinforcement is formed through the slope-the geocell-grass, the root system of the grass is connected with the surrounding soil body, and as time increases, the deeper the root system of the grass is tied, the more the root system is, the larger the anchoring force is, and the more stable the soil body is.
3. After the slope construction is finished, the roadbed slope with the grass seeds completely grown out is green, is more harmonious with the surrounding environment, and is environment-friendly and beautiful.
Construction method for protecting side slope of ecological grass planting roadbed by adopting geocell
In conclusion, the construction method overcomes the problems of low construction speed, high construction cost and poor protection quality of the traditional framework revetment, improves the construction efficiency, can quickly organize and implement, accelerates the construction progress, saves labor and material costs, can be better coordinated with the surrounding environment after being built, has beautiful appearance and achieves the effects of stable protection and ecological environmental protection.
Drawings
Fig. 1 is a schematic view of the structure of the invention laid on a slope.
Fig. 2 is a schematic structural view of the geocell of the present invention.
In the attached drawing, the device comprises a geocell 1, a positioning anchor rod 2 and a rapid trough 3.
Detailed Description
The invention will be further explained with reference to the drawings.
Referring to fig. 1 and 2, a construction method for protecting the side slope of the ecological grass planting roadbed in the geocell comprises the following specific construction steps:
1. preparing the machine tool,
materials and tools (ruler, scissors, wrench, screwdriver, gun drill, etc.) required for construction are prepared.
2. The slope surface is leveled,
the earthwork standard room protection is arranged on the side slope of the embankment, and stones and sandy soil which are loosened on the slope surface need to be removed. Leveling the concave part, checking by using a 2m ruler, and finishing the slope surface by taking the transverse flatness not more than 5cm and the longitudinal flatness not more than 10cm as standards.
3. A drainage system is arranged, and the drainage system is arranged,
the top of the slope, the toe and the platform of the side slope of the roadbed need to be provided with drainage ditches according to the design, and the geocell between different units needs to be provided with a rapid trough 3.
4. Arranging a positioning anchor rod,
before the construction of the geocell 1, the construction of the positioning anchor rod 2 is firstly carried out, the anchor rod material adopts a phi 12mm thread steel bar, if the side slope is a stone side slope, a hole is drilled by a pneumatic drill, and the anchor rod is anchored by an anchoring agent.
According to the size of the geocell 1 and the fine mesh size of the geocell, the position of the anchor rod 2 is fixed, the anchor rod 2 must be vertical to the slope, and the diameter and the fixing mode of the anchor rod 2 need to meet the requirements. The anchor rod 2 is exposed to ensure that the anchor rod can meet the requirement of stretching and hanging the grid chamber, but is not higher than the geocell 1.
5. Installing the geocell, and installing the geocell,
and (3) paving 25cm of ploughing and planting soil at the roadbed section, paving the geocell, and filling 25cm of planting soil. The geocell is opened to the specification size along the direction from the top of the slope to the bottom of the slope, and the two geocell units are connected by the anchor rod.
The planting soil (thickness 25cm) laid firstly should be selected from original surface soil of engineering or nearby agricultural soil, crushed, sieved, and compacted by a small-sized hand-push vibrating tamper or a gray shovel to ensure the compactness of the slope surface filler.
And filling planting soil in the geocell and compacting, spraying water on the slope surface to enable the loose planting soil to be settled and compacted, and filling fine soil into the slope surface until the slope surface reaches the requirement (the thickness is 25cm) after the surface is air-dried.
6. Spray-seeding grass planting
The grass seeds are uniformly scattered in the soil-covered earthwork grid chamber from top to bottom, and the seeding quantity of the grass seeds is generally not less than 9g per square meter. Mixing grass seeds, mixed fertilizer, water-retaining agent, adhesive, fiber and other auxiliary materials, spraying the mixture on the foreign soil, covering the geotextile to prevent the geotextile from being washed by rainwater, and removing the cover after the grass grows out for 3-5 cm. Or applying fertilizer for no more than 48h before spraying to ensure that the fertilizer penetrates into the soil layer and the using amount of the fertilizer is not less than 7kg per square meter.
7. Spray-seeding grass planting
After the construction is finished, care should be taken to perform maintenance work such as watering, fertilizing and the like.
Watering: spraying in a mist form when watering, wherein the time is selected in the morning or evening, and the watering speed does not exceed the water absorption speed of the soil, namely, no surface runoff is caused. Watering is continued until the soil is 2.5 to 5cm completely soaked.
Fertilizing: the nutrient soil can generally meet the requirement of grass seeds on fertilizer content within several months, and if insufficient fertility is found, the fertilizer is supplemented in time.
Claims (10)
1. A construction method for protecting the side slope of an ecological grass planting roadbed in a geocell is characterized by comprising the following steps: firstly laying a layer of planting soil on the constructed roadbed slope and installing a positioning anchor rod, laying a geocell on the planting soil, anchoring the geocell and the roadbed slope by using the positioning anchor rod with a hook, filling the planting soil in the geocell, and finally spraying grass seeds.
2. The construction method for protecting the side slope of the ecological grass planting roadbed in the geocell according to the claim 1, is characterized by comprising the following steps:
a. leveling slope surfaces: removing loose stones and sand on the slope surface, leveling the concave part, and checking the flatness, wherein the flatness needs to meet the requirements that the transverse flatness is not more than 5cm and the longitudinal flatness is not more than 10 cm;
b. setting a drainage system:
drainage ditches are arranged at the top of the slope, the bottom of the slope and the platform of the side slope of the roadbed, and a rapid trough is arranged among the micro-pile soil engineering grid chambers among different units;
c. installing a positioning anchor rod:
before the construction of the geocell, firstly, the construction of a positioning anchor rod is carried out, the position of the anchor rod is fixed according to the size of the geocell and the fineness of the geocell, the anchor rod is vertical to the slope, and the length of the exposed part of the anchor rod ensures the installation requirement of the geocell;
d. installing the geocell:
firstly, laying a layer of planting soil on the roadbed side slope, then laying geocell, filling the planting soil in the geocell, when the geocell is laid, opening the geocell to the slope bottom along the top of the slope to reach the specification size, and connecting the two geocell units by using an anchor rod;
e. spraying and planting grass:
uniformly spreading grass seeds in a soil-covered earthwork grid chamber from top to bottom, wherein the sowing quantity of the grass seeds is not less than 9 g/square meter, spraying the grass seeds, mixed fertilizer, water-retaining agent, adhesive and fiber onto the foreign soil, covering earthwork fabric on the sprayed side slope, and removing the covered earthwork fabric after the grass grows out for 3-5 cm.
3. The construction method for protecting the side slope of the ecological grass planting roadbed in the geocell according to the claim 2, is characterized in that: the geocell is a micro-pile geocell.
4. The construction method for protecting the side slope of the ecological grass planting roadbed in the geocell according to the claim 2, is characterized in that: the anchor rod adopts phi 12mm twisted steel, and when the side slope is a stone side slope, the anchor rod is anchored on the side slope by adopting air drill drilling and then using an anchoring agent.
5. The construction method for protecting the side slope of the ecological grass planting roadbed in the geocell according to the claim 2, is characterized in that: the exposed part of the anchor rod is not higher than the geocell.
6. The construction method for protecting the side slope of the ecological grass planting roadbed in the geocell according to the claim 2, is characterized in that: the thickness of the planting soil is 25 cm.
7. The construction method for protecting the side slope of the ecological grass planting roadbed in the geocell according to the claim 2, is characterized in that: in the step d, the planting soil laid firstly is selected from the original surface soil of the project or the soil of the nearby agricultural field, crushed and sieved, and compacted by a small-sized hand-push vibrating tamper or a gray shovel to ensure the compactness of the slope surface filler;
and c, compacting the planting soil filled in the geocell, spraying water on the slope surface to enable the loose planting soil to be settled and compacted, and filling fine soil into the slope surface after the surface is air-dried to meet the thickness requirement.
8. The construction method for protecting the side slope of the ecological grass planting roadbed in the geocell according to the claim 2, is characterized in that: and e, fertilizing within 48 hours before spray-seeding, wherein the using amount of the fertilizer is not less than 7kg per square meter.
9. The construction method for protecting the side slope of the ecological grass planting roadbed in the geocell according to the claim 2, is characterized in that: and e, after the step e, carrying out watering and fertilizing maintenance work.
10. The construction method for protecting the side slope of the ecological grass planting roadbed in the geocell according to the claim 9, is characterized in that: watering is carried out in a mist form in the morning or evening, the watering speed is lower than the water absorption speed of the soil, and the watering is continued until the soil is soaked by 2.5-5 cm.
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| CN202011380147.XA CN112544350A (en) | 2020-11-30 | 2020-11-30 | Construction method for protecting side slope of ecological grass planting roadbed in geocell |
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| CN202011380147.XA CN112544350A (en) | 2020-11-30 | 2020-11-30 | Construction method for protecting side slope of ecological grass planting roadbed in geocell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115126282A (en) * | 2022-07-25 | 2022-09-30 | 中国十九冶集团有限公司 | Post-reinforcement method for permanent support of adjacent important building structures |
| CN115368063A (en) * | 2022-08-30 | 2022-11-22 | 广西大学 | Bagasse fiber composite low-alkali cement modified expansive soil and construction method of bagasse fiber composite low-alkali cement modified expansive soil applied to side slope |
| CN116290020A (en) * | 2023-03-21 | 2023-06-23 | 重庆交通大学 | Geotechnical grid three-dimensional net slope protection structure and construction method thereof |
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| CN115126282A (en) * | 2022-07-25 | 2022-09-30 | 中国十九冶集团有限公司 | Post-reinforcement method for permanent support of adjacent important building structures |
| CN115368063A (en) * | 2022-08-30 | 2022-11-22 | 广西大学 | Bagasse fiber composite low-alkali cement modified expansive soil and construction method of bagasse fiber composite low-alkali cement modified expansive soil applied to side slope |
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| CN116290020A (en) * | 2023-03-21 | 2023-06-23 | 重庆交通大学 | Geotechnical grid three-dimensional net slope protection structure and construction method thereof |
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Application publication date: 20210326 |
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