CN110106830B - Porous mold bag concrete ecological revetment structure and construction method - Google Patents
Porous mold bag concrete ecological revetment structure and construction method Download PDFInfo
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- CN110106830B CN110106830B CN201910364805.7A CN201910364805A CN110106830B CN 110106830 B CN110106830 B CN 110106830B CN 201910364805 A CN201910364805 A CN 201910364805A CN 110106830 B CN110106830 B CN 110106830B
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- 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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
Abstract
A porous mould bag concrete ecological bank protection structure and a construction method thereof mainly comprise concrete strips, bamboo pipes and anchor rods, wherein the concrete strips are made of mould bag self-compacting concrete, the length direction of the concrete strips forms a certain angle with the contour line of a slope surface, and inclined ditches parallel to the length direction and the width direction of the concrete strips are reserved between the concrete strips; one end of the anchor rod is inserted into the side slope, and the other end of the anchor rod is used for fixing the nest bamboo tube and the vegetation bamboo tube and is buried in the concrete strips. The invention can adapt to complex terrains, has high construction efficiency, can be applied to rocky water banks or hydro-fluctuation belts, provides nests for wild animals while effectively protecting the water banks or hydro-fluctuation belts, and provides a growing environment for plants.
Description
Technical Field
The invention relates to a porous mold bag concrete ecological bank protection structure and a construction method, and belongs to the field of ecological environment protection.
Background
The existing slope protection technology generally protects the falling zone according to the method of arranging plants in a stepped manner and arranging an automatic floating device according to the water level fluctuation of the falling zone. The scheme of plant step arrangement distinguishes different steps according to the biological characteristics of water resistance, drought resistance and the like of different plants, and can solve the problem of greening of the hydro-fluctuation belt to a certain extent, but most of rock slopes lack the living conditions of plants, animals and microorganisms, the plants are not easy to survive, and the growth of the plants is directly influenced by the duration of the flood season; the automatic floating device can effectively protect the side slope of the falling zone by arranging the cutting pad, can wave dissipation and wave prevention, reduces erosion, but cannot adapt to complex terrains, lacks the consideration of animal habitat, and causes ecological balance to be destroyed.
Disclosure of Invention
Aiming at the problems, the invention can effectively protect the side slope, enables the planted plants to survive easily, overcomes the influence of the flood season time on the plants, and provides the porous mold bag concrete ecological bank protection structure and the construction method.
The technical scheme adopted by the invention is as follows:
a porous mould bag concrete ecological bank protection structure comprises concrete strips, wherein nest bamboo tubes and vegetation bamboo tubes are pre-buried in the concrete strips, and gaps parallel to the length direction and the width direction of the concrete strips are reserved among the concrete strips to form crossed oblique ditches; the nest bamboo tubes are bound and fixed on the circular ring anchor rods, the openings of the tube openings of the nest bamboo tubes are arranged in the inclined grooves, and at least two nest bamboo tubes are communicated with each other; one end of the circular anchor rod is inserted into the side slope, and the other end of the circular anchor rod is buried in the concrete strip; the vegetation bamboo tube is inserted into the circular ring of the circular ring anchor rod, and the cavity of the vegetation bamboo tube is provided with a substrate and plants.
The length direction of the oblique groove and the contour line of the slope form an angle beta, and the angle beta is more than or equal to 12 degrees and less than or equal to 30 degrees.
The vegetation bamboo tube and the slope form an alpha angle, and alpha is more than or equal to 60 degrees and less than or equal to 80 degrees.
The substrate in the vegetation bamboo tube cavity is as follows: the method comprises the following steps of (1) fully mixing plowing soil, decomposed wood chips, river sand and a soil adhesive in a volume ratio: ploughing and planting soil: decomposing wood chips: river sand = 70-90: 5-12: 5-15; the dosage of the soil adhesive is 0.016-0.019 g/L; the plant is Cynodon dactylon(Cynodon dactylon (L.) Pers.)Bidens bipinnata(Bidens pilosa L.)Xanthium strumarium(Xanthium sibiricum Patrin ex Widder)Or Polygonum criopolitanum(Ludwigia prostrata Roxb)One or more of them.
The depth of the circular anchor rod inserted into the slope surface is not less than 15 cm, and the length of the circular anchor rod extending out of the slope surface is not less than 20 cm.
The ring stock include vertical reinforcing bar and with vertical steel bar connection's ring, the ring passes vertical reinforcing bar and fixes on vertical reinforcing bar.
The construction method of the porous mould bag concrete ecological bank protection structure comprises the following steps:
(1) preparing materials, preparing materials such as a bamboo pipe, a circular ring anchor rod, a thread anchor rod, a gasket, a screw cap, a geotechnical model bag, a pressing strip and the like: punching through the inner cavities of the nest bamboo tubes and the vegetation bamboo tubes, sealing the tube openings by using thickened plastic films, and then opening the tube walls of the nest bamboo tubes; welding a circular ring on the plain steel bar to form a circular ring anchor rod; the side B which is not sewed and the concrete filling opening are reserved when the geomembrane bag is processed, and positioning rings are sewed on two adjacent sides of the contact plane of the geomembrane bag and the slope surface;
(2) clearing a slope, lofting, clearing away rolling stones, floating soil and dry branches on the slope, and measuring and setting out;
(3) drilling anchor holes, namely drilling anchor holes on the slope surface;
(4) installing a threaded anchor rod, inserting the threaded anchor rod into the anchor hole, and filling a gap between the threaded anchor rod and the hole by cement grouting;
(5) installing a geotechnical model bag, after cement is hardened, penetrating a threaded anchor rod through a positioning ring, pressing a pressing strip on the geotechnical model bag, drilling a hole on the pressing strip, penetrating the threaded anchor rod through a gasket and the pressing strip, inserting the threaded anchor rod into a slope body, and finally screwing a screw cap;
(6) installing bamboo pipes, inserting a circular anchor rod into an anchor hole by penetrating a circular anchor rod into a geotechnical model bag, filling a gap between the anchor rod and the hole by cement grouting, inserting a vegetation bamboo pipe into a circular ring of the circular anchor rod after cement is hardened, bonding the top end of the vegetation bamboo pipe to the inner surface of the geotechnical model bag, binding and fixing nest bamboo pipes on the circular anchor rod, bonding the two nest bamboo pipes at a joint E, and sewing the geotechnical model bag after assembly is completed;
(7) pouring concrete, wherein concrete strips are constructed by adopting a concrete pumping technology, and the construction sequence of the concrete strips is carried out from the top of a slope to the bottom of the slope in sequence; when each concrete strip is constructed, self-compacting concrete is poured from a concrete pouring opening of the earth work mold bag;
(8) curing, namely starting watering curing after mortar is finally set, wherein the surface of the revetment is required to be in a wet state during curing, and when the strength of concrete reaches over 75 percent, cutting the side edge of a mould bag connected with the nest bamboo tube to expose a tube opening to form an inlet for passing animals;
(9) constructing the vegetation bamboo tube, cutting the upper surface of a mould bag connected with the vegetation bamboo tube to expose the tube opening, and putting the substrate and the plant seeds into the tube.
The porous mould bag concrete ecological bank protection structure and the construction method provided by the invention have the following beneficial effects:
1) the porous concrete structure formed by the mould bag concrete and the embedded bamboo tubes integrally solves the problems of protection and greening of the hydro-fluctuation belt or the river bank and biological nest construction, increases the stability and biological diversity of the hydro-fluctuation belt or the river bank, and beautifies the landscape.
2) By using the geotechnical formwork bag and the pumping self-compacting concrete technology, the construction cost is reduced, and the construction is convenient.
3) The mould bag concrete can adapt to the unevenness topography of side slope, can effectively protect the side slope.
4) The bamboo pipes with different diameters are pre-buried, so that various organisms can inhabit, and fishes, shrimps and the like can inhabit underwater; when on water, it can be used for frog, snake, tortoise, etc.
5) The inclined ditches among the concrete strips have small gradient, and can drain water and provide a channel for animal activities.
6) The ring anchor rod and the thread anchor rod are implanted into the side slope to reinforce the strength and the self-stabilizing capacity of the rock mass, so that the fixing strength of the bamboo pipe is increased, and the concrete, the geotechnical formwork bag and the rock mass form a common system.
In conclusion, the invention can effectively protect the side slope, provides survival conditions for plants, animals and microorganisms on the rock slope, enables the planted plants to survive easily, and solves the problem of simultaneously protecting and greening the steep rock slope.
Drawings
Fig. 1 is a schematic plan view of a geotextile bag installed on a slope with concrete poured but without removal of the geotextile bag.
Fig. 2 is a schematic perspective view of a single geotextile bag installed on a slope surface with bamboo tubes installed but without concrete poured.
Fig. 3 is a sectional view taken along line a-a of fig. 1.
Fig. 4 is a detail view of fig. 3 at the threaded bolt installation site Z.
Fig. 5 is a detail view of the splicing position C of the bamboo tube in nest cave in fig. 2.
Figure 6 is a schematic view of a single geotextile bag that is not sewn.
In the figure: the special-shaped earthwork mould comprises a circular anchor rod 1, concrete strips 2, a nest bamboo tube 3, a positioning ring 4, a side slope 5, a vegetation bamboo tube 6, an inclined ditch 7, a concrete filling opening 8, a pressing strip 9, a threaded anchor rod 10, a gasket 11, a screw cap 12, a nest bamboo tube connector E, an unsewn side B of the earthwork mould bag and a processed side D of the earthwork mould bag.
Detailed Description
The invention is further illustrated by the following figures and examples. The following examples are given solely to aid in the understanding of the present invention and are not intended to limit the scope of the invention. It should be pointed out that simple alternatives and combinations of some of the features of the above solutions, such as replacing the bamboo tube with a plastic or iron tube and replacing the anchor rod with a plastic or wood rod, are included in the solution of the invention.
The ring anchor rod 1 comprises vertical steel bars and a ring connected with the vertical steel bars, wherein the ring penetrates through the vertical steel bars and is fixed on the vertical steel bars.
The bag body of the geotechnical mold bag is a product made of two layers of all polypropylene high-strength woven fabrics.
The self-compacting concrete comprises the following components in parts by weight: mineral powder: fly ash: water: sand: crushing stone: the admixture is 17: 4.5: 2.5: 6.5: 30: 39: 0.5. wherein, the cement is ordinary Portland cement P.042.5; the model of the mineral powder is S95 grade; the fly ash is grade II; the sand is the sand in the area II; the broken stone is limestone broken stone, and the particle size of the stone is 5-20 mm; the additive is a mixture of a polyhydroxy acid high-performance water reducing agent and an expanding agent.
The drill model is a hand-held ZQSJ-140/4.1 drill.
The welder model is NB-315Y gas welder.
Example 1
The land is a rock slope with the gradient of 30 degrees and the slope height of 3 m, and the invention is used for protection.
The shape of the geomembrane bag is shown in fig. 6, the length is 2 m, the width is 1 m, and the vertical height H between the highest point and the bottom surface of the geomembrane bag is 40 cm; the locating ring is made of stainless steel, the distance between the installing position of the locating ring and the side edge of the geotechnical model bag is 15 cm, the diameter of the locating ring is 15 mm, the thickness of the locating ring is 8 mm, and the distance between the two locating rings is 30 cm.
The vertical steel bars in the ring anchor rod are HPB 300-grade plain round steel bars, the diameter is 10 mm, the distance is 50 cm, the ring on the ring anchor rod is solid round steel, and the outer diameter is 10 cm; the threaded anchor rod is HRB400E grade threaded steel bar, the diameter is 12 mm, and the distance is 30 cm.
The porous mould bag concrete ecological revetment structure comprises concrete strips 2, wherein nest bamboo pipes 3 and vegetation bamboo pipes 6 are pre-embedded in the concrete strips 2, gaps which are respectively parallel to the length direction and the width direction of the concrete strips 2 are reserved among the concrete strips 2 to form crossed oblique ditches 7, and the length direction of the oblique ditches and the contour line of a slope form an angle of 12 degrees; the nest bamboo tube 3 is bound and fixed on the circular anchor rod 1, the opening of the tube opening is arranged in the inclined groove 7, and at least two are communicated with each other; one end of the circular anchor rod 1 is inserted into the side slope, and the other end of the circular anchor rod is embedded in the concrete strip 2; the vegetation bamboo tube 6 is inserted into the circular ring of the circular ring anchor rod 1, and the cavity of the vegetation bamboo tube 6 is filled with the matrix and the plants and forms an angle of 60 degrees with the slope.
The nest-hole bamboo tubes 3 in the single concrete strips 2 are provided with 3 pieces, and the diameters of the nest-hole bamboo tubes are 5 cm, 10 cm and 15 cm respectively; the length of the vegetation bamboo tube 6 is 40 cm, and the diameter is 5 cm.
The matrix in the cavity of the vegetation bamboo pipe 6 is as follows: the mixture of the plowing soil, the decomposed wood chips, the river sand and the soil adhesive comprises the following components in percentage by volume: ploughing and planting soil: decomposing wood chips: river sand = 70: 5: 5; the dosage of the soil adhesive is 0.016 g/L; the plant is Cynodon dactylon(Cynodon dactylon (L.) Pers.)And Bidens bipinnata(Bidens pilosa L.)。
The width of the inclined groove 7 is 30 cm.
The length of the circular anchor rod 1 inserted into the slope surface is 15 cm, and the length of the circular anchor rod extending out of the slope surface is 20 cm.
The concrete strips 2 are formed by self-compacting concrete poured by pumping C25.
The construction method of the porous mould bag concrete ecological bank protection structure comprises the following steps:
(1) preparing materials, preparing materials such as a bamboo pipe, a circular ring anchor rod, a thread anchor rod, a gasket, a screw cap, a geotechnical model bag, a pressing strip and the like: punching through the inner cavities of the nest bamboo tubes and the vegetation bamboo tubes, sealing the tube openings by using thickened plastic films, and then opening the tube walls of the nest bamboo tubes; welding a circular ring on the plain steel bar to form a circular ring anchor rod; the side B which is not sewed and the concrete filling opening are reserved when the geomembrane bag is processed, and positioning rings are sewed on two adjacent sides of the contact plane of the geomembrane bag and the slope.
(2) And (4) clearing the slope, lofting, clearing away rolling stones, floating soil and dry branches on the slope, and measuring and setting out.
(3) And drilling anchor holes, namely drilling anchor holes on the slope surface.
(4) And installing a threaded anchor rod, inserting the threaded anchor rod into the anchor hole, filling a gap between the threaded anchor rod and the hole by cement grouting, wherein the depth of the threaded anchor rod inserted into the slope surface is 15 cm.
(5) Installing a mould bag, after cement is hardened, penetrating a threaded anchor rod through a positioning ring, pressing a pressing strip on the geotechnical mould bag, then drilling a hole on the pressing strip, wherein the pressing strip is solid rubber, has the width of 10 cm and the thickness of 8 mm, penetrating the threaded anchor rod through a gasket and the pressing strip, inserting the threaded anchor rod into a slope body, and finally screwing a screw cap.
(6) The installation bamboo tube, pierce through the geotechnique's mould bag to the ring stock and insert the anchor eye in, fill the clearance between reinforcing bar and the hole with cement slip casting, treat the cement sclerosis back, insert the vegetation bamboo tube in the ring of ring stock, adopt sticky mode to fix its top at geotechnique's mould bag internal surface, fix nest bamboo tube ligature on the ring stock after that, it is fixed through nest bamboo tube interface E between two nest bamboo tubes, for strengthening the intensity of kneck, can assist the latex fixed, prevent that nest bamboo tube is not hard up, fix nest bamboo tube and vegetation bamboo tube on the stock with the iron wire after that, sew up the geotechnique's mould bag after assembling the completion.
(7) Pouring concrete, wherein concrete strips are constructed by adopting a concrete pumping technology, and the construction sequence of the concrete strips is carried out from the top of a slope to the bottom of the slope in sequence; when each concrete strip is constructed, self-compacting C25 pump concrete is poured from the concrete pouring opening of the earth work die bag.
(8) And (3) curing, namely starting watering curing after mortar is finally set, wherein the surface of the revetment is required to be in a wet state during curing, the curing time is 7 days, and when the strength of concrete reaches 75%, cutting the side edge of a mould bag connected with the nest bamboo tube to expose a tube opening to form an inlet for passing animals.
(9) Constructing the vegetation bamboo pipe, cutting the upper surface of a mold bag connected with the vegetation bamboo pipe to expose a pipe opening, and putting a substrate and plant seeds into a cavity of the bamboo pipe.
Example 2
The slope with soil and stones is fallen in a certain place, the slope is 45 degrees, the slope height is 4 m, and the invention is used for protection.
The shape of the geomembrane bag is shown in fig. 6, the length is 2.5 m, the width is 1.5 m, and the vertical height H between the highest point and the bottom surface of the geomembrane bag is 50 cm; the locating ring is made of stainless steel, the distance between the installing position of the locating ring and the side edge of the geotechnical model bag is 25 cm, the diameter of the locating ring is 15 mm, the thickness of the locating ring is 10 mm, and the distance between the two locating rings is 35 cm.
The vertical steel bars in the ring anchor rod are HPB 300-grade plain round steel bars, the diameter is 10 mm, the distance is 55 cm, the ring on the ring anchor rod is solid round steel, and the outer diameter is 12 cm; the threaded anchor rod is HRB400E grade threaded steel bar, the diameter is 12 mm, and the distance is 35 cm.
The porous mould bag concrete ecological revetment structure comprises concrete strips 2, wherein nest bamboo pipes 3 and vegetation bamboo pipes 6 are pre-embedded in the concrete strips 2, gaps which are respectively parallel to the length direction and the width direction of the concrete strips 2 are reserved among the concrete strips 2 to form crossed oblique ditches 7, and the length direction of the oblique ditches and the contour line of a slope form an angle of 20 degrees; the nest bamboo tube 3 is bound and fixed on the circular anchor rod 1, the opening of the tube opening is arranged in the inclined groove 7, and at least two are communicated with each other; one end of the circular anchor rod 1 is inserted into the side slope, and the other end of the circular anchor rod is embedded in the concrete strip 2; the vegetation bamboo tube 6 is inserted into the circular ring of the circular ring anchor rod 1, and the cavity of the vegetation bamboo tube 6 is filled with the matrix and the plants and forms an angle of 70 degrees with the slope.
The nest-hole bamboo tubes 3 in the single concrete strips 2 are provided with 4 pieces, and the diameters of the nest-hole bamboo tubes are 5 cm, 10 cm, 15 cm and 20 cm respectively.
The vegetation bamboo tube 6 is 50 cm in length and 10 cm in diameter.
The matrix in the cavity of the vegetation bamboo pipe 6 is as follows: mixing of ploughed and planted soil, decomposed wood chips, river sand and soil adhesiveCompound, in volume ratio: ploughing and planting soil: decomposing wood chips: river sand = 80: 10: 10; the dosage of the soil adhesive is 0.018 g/L; the plant is Cynodon dactylon(Cynodon dactylon (L.) Pers.)Bidens bipinnata(Bidens pilosa L.)And herba Xanthii(Xanthium sibiricum Patrin ex Widder)。
The width of the inclined groove 7 is 40 cm.
The length of the circular anchor rod 1 inserted into the slope surface is 18 cm, and the length of the circular anchor rod extending out of the slope surface is 25 cm.
The concrete strip 2 is self-compacting concrete pumped with C25.
The construction method of the porous mould bag concrete ecological bank protection structure comprises the following steps:
(1) preparing materials, preparing materials such as a bamboo pipe, a circular ring anchor rod, a thread anchor rod, a gasket, a screw cap, a geotechnical model bag, a pressing strip and the like: punching through the inner cavities of the nest bamboo tubes and the vegetation bamboo tubes, sealing the tube openings by using thickened plastic films, and then opening the tube walls of the nest bamboo tubes; welding a circular ring on the plain steel bar to form a circular ring anchor rod; the side B which is not sewed and the concrete filling opening are reserved when the geomembrane bag is processed, and positioning rings are sewed on two adjacent sides of the contact plane of the geomembrane bag and the slope.
(2) And (4) clearing the slope, lofting, clearing away rolling stones, floating soil and dry branches on the slope, and measuring and setting out.
(3) And drilling anchor holes, namely drilling anchor holes on the slope surface.
(4) And installing a threaded anchor rod, inserting the threaded anchor rod into the anchor hole, filling a gap between the threaded anchor rod and the hole by cement grouting, wherein the depth of the threaded anchor rod inserted into the slope surface is 18 cm.
(5) Installing a mould bag, after cement is hardened, penetrating a threaded anchor rod through a positioning ring, pressing a pressing strip on the geotechnical mould bag, then drilling a hole on the pressing strip, wherein the pressing strip is made of a stainless steel sheet, the width of the pressing strip is 15 cm, the thickness of the pressing strip is 10 mm, then penetrating the threaded anchor rod through a gasket and the pressing strip to be inserted into a slope body, and finally screwing a screw cap.
(6) The installation bamboo tube, pierce through geotechnological mould bag to the ring stock and insert the anchor eye in, interval between reinforcing bar and the hole is filled in with cement slip casting, treat the cement sclerosis back, insert the vegetation bamboo tube in the ring of ring stock, adopt sticky mode to fix its top at geotechnological mould bag internal surface, fix nest bamboo tube ligature on the ring stock after that, it is fixed through nest bamboo tube interface E between two nest bamboo tubes, for strengthening the intensity of kneck, can assist the latex fixed, prevent that nest bamboo tube is not hard up, fix nest bamboo tube and vegetation bamboo tube on the stock with the iron wire after then, sew up the mould bag after assembling the completion.
(7) Pouring concrete, wherein concrete strips are constructed by adopting a concrete pumping technology, and the construction sequence of the concrete strips is carried out from the top of a slope to the bottom of the slope in sequence; when each concrete strip is constructed, self-compacting C25 pump concrete is poured from the concrete pouring opening of the earth work die bag.
(8) And (3) curing, namely starting watering curing after mortar is finally set, wherein the surface of the revetment is required to be in a wet state during curing, the curing time is 7 days, and when the strength of concrete reaches 80%, cutting the side edge of a mould bag connected with the nest bamboo tube to expose a tube opening to form an inlet for passing animals.
(9) Constructing the vegetation bamboo pipe, cutting the upper surface of a mold bag connected with the vegetation bamboo pipe to expose a pipe opening, and putting a substrate and plant seeds into a cavity of the bamboo pipe.
The ground is a broken rock slope with the gradient of 60 degrees and the slope height of 5 m, and the invention is used for protection.
The shape of the geomembrane bag is shown in fig. 6, the length is 3 m, the width is 2 m, and the vertical height H between the highest point and the bottom surface of the geomembrane bag is 60 cm; the locating ring is made of stainless steel, the distance between the installing position of the locating ring and the side edge of the geotechnical model bag is 35 cm, the diameter of the locating ring is 15 mm, the thickness of the locating ring is 12 mm, and the distance between the two locating rings is 40 cm.
The vertical steel bars in the ring anchor rod are HPB 300-grade plain round steel bars, the diameter is 10 mm, the distance is 60 cm, the ring on the ring anchor rod is solid round steel, and the outer diameter is 16 cm; the threaded anchor rod is HRB400E grade threaded steel bar, the diameter is 12 mm, and the distance is 40 cm.
The porous mould bag concrete ecological revetment structure comprises concrete strips 2, wherein nest bamboo pipes 3 and vegetation bamboo pipes 6 are pre-embedded in the concrete strips 2, gaps which are respectively parallel to the length direction and the width direction of the concrete strips 2 are reserved among the concrete strips 2 to form crossed oblique ditches 7, and the length direction of the oblique ditches and the contour line of a slope form an angle of 30 degrees; the nest bamboo tube 3 is bound and fixed on the circular anchor rod 1, the opening of the tube opening is arranged in the inclined groove 7, and at least two are communicated with each other; one end of the circular anchor rod 1 is inserted into the side slope, and the other end of the circular anchor rod is embedded in the concrete strip 2; the vegetation bamboo tube 6 is inserted into the circular ring of the circular ring anchor rod 1, and the cavity of the vegetation bamboo tube 6 is filled with the matrix and the plants and forms an angle of 80 degrees with the slope.
The nest bamboo tubes 3 in the single geotechnical model bag 2 are provided with 5 pieces, and the diameters of the nest bamboo tubes are 5 cm, 10 cm, 15 cm, 20 cm and 25 cm respectively.
The vegetation bamboo tube 6 is 60 cm in length and 15 cm in diameter.
The matrix in the cavity of the vegetation bamboo pipe 6 is as follows: the mixture of the plowing soil, the decomposed wood chips, the river sand and the soil adhesive comprises the following components in percentage by volume: ploughing and planting soil: decomposing wood chips: river sand = 90: 12: 15; the dosage of the soil adhesive is 0.019 g/L; the plant is Cynodon dactylon(Cynodon dactylon (L.) Pers.)Bidens bipinnata(Bidens pilosa L.)Xanthium strumarium(Xanthium sibiricum Patrin ex Widder)And Polygonum hydropiper(Ludwigia prostrata Roxb)。
The width of the inclined groove 7 is 45 cm.
The length of the circular anchor rod 1 inserted into the slope surface is 20 cm, and the length of the circular anchor rod extending out of the slope surface is 30 cm.
The concrete strip 2 is self-compacting concrete pumped with C25.
The construction method of the porous mould bag concrete ecological bank protection structure comprises the following steps:
(1) preparing materials, preparing materials such as a bamboo pipe, a circular ring anchor rod, a thread anchor rod, a gasket, a screw cap, a geotechnical model bag, a pressing strip and the like: punching through the inner cavities of the nest bamboo tubes and the vegetation bamboo tubes, sealing the tube openings by using thickened plastic films, and then opening the tube walls of the nest bamboo tubes; welding a circular ring on the plain steel bar to form a circular ring anchor rod; the side B which is not sewed and the concrete filling opening are reserved when the geomembrane bag is processed, and positioning rings are sewed on two adjacent sides of the contact plane of the geomembrane bag and the slope.
(2) And (4) clearing the slope, lofting, clearing away rolling stones, floating soil and dry branches on the slope, and measuring and setting out.
(3) And drilling anchor holes, namely drilling anchor holes on the slope surface.
(4) And installing a threaded anchor rod, inserting the threaded anchor rod into the anchor hole, filling a gap between the threaded anchor rod and the hole by cement grouting, and enabling the depth of the threaded anchor rod inserted into the slope surface to be 20 cm.
(5) Installing a mould bag, after cement is hardened, penetrating a threaded anchor rod through a positioning ring, pressing a pressing strip on the geotechnical mould bag, then drilling a hole on the pressing strip, wherein the pressing strip is made of an iron sheet, the width of the pressing strip is 20 cm, the thickness of the pressing strip is 12 mm, then penetrating the threaded anchor rod through a gasket and the pressing strip to be inserted into a slope body, and finally screwing a screw cap.
(6) The installation bamboo tube, pierce through geotechnological mould bag to the ring stock and insert the anchor eye in, fill the clearance between reinforcing bar and the hole with cement slip casting, treat the cement sclerosis back, insert the vegetation bamboo tube in the ring of ring stock, adopt sticky mode to fix its top at geotechnological mould bag internal surface, fix nest bamboo tube ligature on the ring stock after that, it is fixed through nest bamboo tube interface E between two nest bamboo tubes, for strengthening the intensity of kneck, can assist the latex fixed, prevent that nest bamboo tube is not hard up, fix nest bamboo tube and vegetation bamboo tube on the stock with the iron wire after then, sew up the mould bag after assembling the completion.
(7) Pouring concrete, wherein concrete strips are constructed by adopting a concrete pumping technology, and the construction sequence of the concrete strips is carried out from the top of a slope to the bottom of the slope in sequence; when each concrete strip is constructed, self-compacting C25 pump concrete is poured from the concrete pouring opening of the earth work die bag.
(8) And (3) curing, namely starting watering curing after mortar is finally set, wherein the surface of the revetment is required to be in a wet state during curing, the curing time is 7 days, and when the strength of concrete reaches 85%, cutting the side edge of a mould bag connected with the nest bamboo tube to expose a tube opening to form an inlet for passing animals.
(9) Constructing the vegetation bamboo pipe, cutting the upper surface of a mold bag connected with the vegetation bamboo pipe to expose a pipe opening, and putting a substrate and plant seeds into a cavity of the bamboo pipe.
Claims (7)
1. A construction method of a porous mould bag concrete ecological revetment structure is characterized in that: the porous mould bag concrete ecological bank protection structure comprises concrete strips (2), wherein nest bamboo tubes (3) and vegetation bamboo tubes (6) are pre-embedded in the concrete strips (2), and gaps parallel to the length direction and the width direction of the concrete strips (2) are reserved among the concrete strips (2) to form crossed oblique ditches (7); the nest bamboo tubes (3) are bound and fixed on the circular anchor rods (1), the openings of the tube openings are arranged in the inclined grooves (7), and at least two of the tube openings are communicated with each other; one end of the circular anchor rod (1) is inserted into the side slope, and the other end of the circular anchor rod is embedded in the concrete strip (2); the vegetation bamboo tube (6) is inserted into the circular ring of the circular ring anchor rod (1); the cavity of the vegetation bamboo tube (6) is filled with a substrate and plants;
the construction method of the porous mould bag concrete ecological bank protection structure comprises the following steps:
(1) preparing materials, preparing a bamboo pipe, a circular ring anchor rod, a thread anchor rod, a gasket, a screw cap, a geotechnical mold bag and a pressing strip: punching through the inner cavities of the nest bamboo tubes and the vegetation bamboo tubes, sealing the tube openings by using thickened plastic films, and then opening the tube walls of the nest bamboo tubes; welding a circular ring on the plain steel bar to form a circular ring anchor rod; the side B which is not sewed and the concrete filling opening are reserved when the geomembrane bag is processed, and positioning rings are sewed on two adjacent sides of the contact plane of the geomembrane bag and the slope surface;
(2) clearing a slope, lofting, clearing away rolling stones, floating soil and dry branches on the slope, and measuring and setting out;
(3) drilling anchor holes, namely drilling anchor holes on the slope surface;
(4) installing a threaded anchor rod, inserting the threaded anchor rod into the anchor hole, and filling a gap between the threaded anchor rod and the hole by cement grouting;
(5) installing a geotechnical model bag, after cement is hardened, penetrating a threaded anchor rod through a positioning ring, pressing a pressing strip on the geotechnical model bag, drilling a hole on the pressing strip, penetrating the threaded anchor rod through a gasket and the pressing strip, inserting the threaded anchor rod into a slope body, and finally screwing a screw cap;
(6) installing bamboo pipes, inserting a circular anchor rod into an anchor hole by penetrating a circular anchor rod into a geotechnical model bag, filling a gap between the anchor rod and the hole by cement grouting, inserting a vegetation bamboo pipe into a circular ring of the circular anchor rod after cement is hardened, bonding the top end of the vegetation bamboo pipe to the inner surface of the geotechnical model bag, binding and fixing nest bamboo pipes on the circular anchor rod, bonding the two nest bamboo pipes at a joint E, and sewing the geotechnical model bag after assembly is completed;
(7) pouring concrete, wherein concrete strips are constructed by adopting a concrete pumping technology, and the construction sequence of the concrete strips is carried out from the top of a slope to the bottom of the slope in sequence; when each concrete strip is constructed, self-compacting concrete is poured from a concrete pouring opening of the earth work mold bag;
(8) curing, namely starting watering curing after the concrete is finally set, wherein the surface of the revetment is required to be in a wet state during curing, and when the strength of the concrete reaches over 75 percent, cutting the side edge of a mould bag connected with the nest bamboo tube to expose a tube opening to form an inlet for animals to pass through;
(9) constructing the vegetation bamboo pipe, cutting the upper surface of a mold bag connected with the vegetation bamboo pipe to expose a pipe opening, and putting a substrate and plant seeds into a cavity of the bamboo pipe.
2. The construction method of the porous mould bag concrete ecological bank protection structure according to claim 1, is characterized in that: the length direction of the oblique groove (7) forms an angle beta with the contour line of the slope surface, and the angle beta is more than or equal to 12 degrees and less than or equal to 30 degrees.
3. The construction method of the porous mould bag concrete ecological bank protection structure according to claim 1, is characterized in that: the vegetation bamboo tube (6) forms an alpha angle with the slope surface, and the alpha is more than or equal to 60 degrees and less than or equal to 80 degrees.
4. The construction method of the porous mold bag concrete ecological bank protection structure according to claim 1, 2 or 3, characterized in that: the substrate in the cavity of the vegetation bamboo tube (6) is as follows: the method comprises the following steps of (1) fully mixing plowing soil, decomposed wood chips, river sand and a soil adhesive in a volume ratio: ploughing and planting soil: decomposing wood chips: river sand = 70-90: 5-12: 5-15; the dosage of the soil adhesive is 0.016-0.019 g/L.
5. The construction method of the porous mould bag concrete ecological bank protection structure according to claim 1, is characterized in that: the plant is one or more of bermudagrass, sticktight, siberian cocklebur or polygonum.
6. The construction method of the porous mould bag concrete ecological bank protection structure according to claim 1, is characterized in that: the depth of the circular anchor rod (1) inserted into the slope surface is not less than 15 cm, and the length of the circular anchor rod extending out of the slope surface is not less than 20 cm.
7. The construction method of the porous mould bag concrete ecological bank protection structure according to claim 1, is characterized in that: the ring stock include vertical reinforcing bar and with vertical steel bar connection's ring, the ring passes vertical reinforcing bar and fixes on vertical reinforcing bar.
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| CN114016466B (en) * | 2021-12-09 | 2023-05-05 | 山东科技大学 | Slope protection system for anchoring geomembrane bag and construction method thereof |
| CN114622518B (en) * | 2022-02-21 | 2023-05-09 | 中国长江三峡集团有限公司 | Ecological nest of rock slope cantilever slab rockfill of hydro-fluctuation belt and construction method |
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