CN112832270B - Self-healing flexible concrete slope protection structure and construction method thereof - Google Patents

Abstract

The invention discloses a self-healing flexible concrete side slope protection structure and a construction method thereof, wherein the side slope protection structure comprises a plurality of protection frameworks with the same structure, the plurality of protection frameworks are arranged in an array manner to form a plurality of triangular stable structures, and a vegetable layer is arranged inside each triangle; the protection frameworks in the same row are in close contact, and a drainage channel is arranged between the adjacent protection frameworks in the same row. The invention has the advantages of considering both drainage and stability, reducing the damage of rainwater to the side slope, having strong durability, prolonging the service life of the roadbed side slope protection structure, improving the stability of the side slope and solving the problems in the prior art.

Description

Self-healing flexible concrete slope protection structure and construction method thereof

Technical Field

The invention belongs to the technical field of roadbed slope protection, and relates to a self-healing flexible concrete slope protection structure and a construction method thereof.

Background

In recent years, the investment of China on railways and highways is steadily increased, the construction of traffic infrastructure comes up to the peak period, and a plurality of newly-built lines are successively opened. The roadbed is used as a direct structure for bearing upper static load and dynamic load, the service life and the use comfort of a road are directly influenced by the quality of the roadbed, the use performance of the roadbed can be influenced by side slope instability at two sides, for example, the roadbed is seriously damaged due to side slope slip, landslide and the like, so that the side slope protection is taken as an important aspect of roadbed protection, the side slope protection is well made, and the safety of the roadbed can be ensured only by ensuring the stability of the side slope.

When the slope of the actual engineering is protected, the slope of the general soil and rock is usually protected by adopting the protection structure forms of frame beams, herringbone frameworks or arch frameworks and the like. The framework of the protective structure is generally formed by pouring common concrete in a groove which is pre-arranged on the surface of a side slope, and belongs to a rigid structure which has the function of draining water on the surface of the side slope. However, the common concrete rigid protective structure is easily washed by rainwater to cause the soil body at the lower part of the protective structure to be hollowed, and the generated gap prevents the concrete framework from being tightly attached to the slope surface. In the past, the concrete frameworks are not uniformly settled, cracked or even broken, once the frameworks are cracked and broken and cannot be repaired in time, rainwater collected from the slope surface of the upper part flows to the slope surface of the deep part from the cracks and the broken surface damage part, so that the drainage function of the protection structure is lost, and the scouring of the rainwater on the slope surface of the side slope is aggravated. Obviously, the severe external environment will accelerate the damage of such protective structures, and finally endanger the stability of the roadbed slope and the safety of road traveling.

In summary, in order to make the slope protection structure not easy to be damaged and have better stability, it is very necessary to develop a self-healing flexible concrete slope protection structure and a construction method.

Disclosure of Invention

In order to solve the problems, the invention provides a self-healing flexible concrete side slope protection structure, which has both drainage performance and stability, reduces the damage of rainwater to a side slope, has strong durability, prolongs the service life of the roadbed side slope protection structure, improves the stability of the side slope, and solves the problems in the prior art.

The invention also aims to provide a construction method of the self-healing flexible concrete slope protection structure.

The technical scheme adopted by the invention is that the self-healing flexible concrete slope protection structure comprises a plurality of protection frameworks with the same structure, wherein the protection frameworks are arranged in an array manner to form a plurality of triangular stable structures, and a vegetable layer is arranged in each triangle; the protection frameworks in the same row are in close contact, and a drainage channel is arranged between the adjacent protection frameworks in the same row.

Furthermore, each protective framework is composed of a first L-shaped structural unit, a second L-shaped structural unit and a claw-shaped structural unit, and the upper surfaces of the first L-shaped structural unit, the second L-shaped structural unit and the claw-shaped structural unit are flush; the opening of the claw-shaped structure unit is downward, the first L-shaped structure unit and the second L-shaped structure unit are respectively arranged at two sides of the claw-shaped structure unit, the structures of the first L-shaped structure unit and the second L-shaped structure unit are bilaterally symmetrical, the openings of the first L-shaped structure unit and the second L-shaped structure unit are opposite, the end surfaces of the branch parts of the first L-shaped structure unit and the second L-shaped structure unit are matched with the corresponding positions of the claw-shaped structure unit in shape, and a space exists between the end surfaces of the branch parts to form a water chute; and a drainage channel is formed between adjacent protective frameworks in the same row at intervals, and the water guide groove and the drainage channel jointly form a drainage structure.

Furthermore, the claw-shaped structural unit consists of a middle protective framework, a left inclined protective framework and a right inclined protective framework; first L type constitutional unit, second L type constitutional unit constitute by horizontal protection skeleton and vertical protection skeleton, and the vertical protection skeleton upper end of the first L type constitutional unit of drainage ditch both sides, second L type constitutional unit inclines to the direction of keeping away from each other for the width interval of drainage ditch changes, and the width at the three trouble node department of drainage ditch both sides is by narrow widen.

Further, the width of the vertical protection framework that the slope set up is from last to crescent down, and the side that vertical protection framework kept away from each other is vertical, and the side lower extreme that vertical protection framework is close to each other inclines to the direction that is close to each other, and the side lower extreme that the vertical protection framework that the slope set up is close to each other is equipped with the inclined plane of expanding down the port.

Furthermore, the vertical protection frameworks at the top end and the bottom end of the two sides of the drainage channel are not inclined, the width of the top end of the drainage channel is the same as the narrowest part of the interval between two adjacent vertical protection frameworks at the lower layer, and the width of the bottom end of the drainage channel is the same as the widest part of the interval between two adjacent vertical protection frameworks at the upper layer; two adjacent vertical protection frameworks on two sides of the same drainage channel have the same lower end interval, and the vertical protection frameworks on two sides of the same drainage channel have the same gradient.

Further, the protection framework is a solid structure formed by pouring self-healing flexible concrete, and the self-healing flexible concrete comprises the following components in parts by weight: 870-930 parts of fine aggregate, 820-880 parts of coarse aggregate, 422-462 parts of cement, 230-260 parts of water, 13-20 parts of alicyclic epoxy resin, 5-20 parts of rubber particles, 6-10 parts of high-strength fiber and 5-9 parts of self-healing gel; the self-healing gel is a self-healing hydrogel based on an agarose/polyvinyl alcohol double network.

Furthermore, stairs are arranged on two sides of the slope structure, and vertical protective frameworks of the first L-shaped structural unit and the second L-shaped structural unit close to the stairs are vertical structures; the longitudinal section of the drainage channel is U-shaped, and the bottom of the drainage channel is provided with a strip-shaped base body.

Furthermore, the range of the inclination angle of the lower end of the vertical protection framework is 5-15 degrees, and the width of the water chute is 10-15 cm.

A construction method of a self-healing flexible concrete slope protection structure specifically comprises the following steps:

s1, carrying out slope cutting treatment on the side slope to be protected according to the designed slope-releasing ratio, digging a groove and leveling;

s2, vertically digging a plurality of spaced cylindrical fixing holes at the position of the leveled drainage channel by using a punching machine, and placing the hollow circular ring in the fixing holes;

s3, arranging sectional partition plates at the junctions of the drainage channels and the left and right protective frameworks, pouring a self-healing flexible concrete layer on the slope surface, and leveling the surface; when the self-healing flexible concrete layer is initially set, the hollow circular ring is removed; before the self-healing flexible concrete is initially set, dismantling the sectional partition plates to form an expansion joint;

s4, after the self-healing flexible concrete layer is naturally cured to be condensed, pouring protective frameworks on the self-healing flexible concrete layer through the self-healing flexible concrete, arranging a plurality of protective frameworks in an array mode to form a plurality of triangular stable structures, enabling the protective frameworks in the same row to be in close contact with each other, arranging drainage channels between adjacent protective frameworks in the same row, and naturally curing to be condensed;

s5, driving the soil nails into the fixing holes until the outermost ends of the soil nails are flush with the bottom surface of the drainage channel; after the soil nail is driven in, cement paste is pressed in from the opening of the soil nail;

s6, spraying or uniformly brushing a plurality of layers of self-healing gel on the outer surface of the self-healing flexible concrete of the protective framework and the drainage structure, wherein brushing is divided into 3-5 times, each time interval is 10 minutes, and each brushing thickness is 3-5 mm;

s7, after the natural maintenance of the side slope integral protection framework is finished, hanging a net on the side slope;

s8, uniformly stirring the treated plant seeds, fibrous tissues, gelling agents, water-retaining agents, nutritional fertilizers and slurry, uniformly spraying the mixture into each triangle of the protective framework through a spray-seeding machine, and spraying the mixture to a thickness of 3-5 cm.

Further, the preparation method of the self-healing flexible concrete comprises the following steps:

s31, weighing 870-930 parts of fine aggregate, 820-880 parts of coarse aggregate, 422-462 parts of cement, 230-260 parts of water, 13-20 parts of alicyclic epoxy resin, 5-20 parts of rubber particles, 6-10 parts of high-strength fiber and 5-9 parts of self-healing gel according to the following parts by weight;

s32, dry-mixing the weighed fine aggregate, coarse aggregate, cement and high-strength fiber, namely adding the weighed materials in sequence, and uniformly mixing the materials in the process of mechanical stirring or manual stirring and mixing; wherein, the high-strength fiber is discharged at last, and the stirring sequence of the fine aggregate, the coarse aggregate and the cement is adjusted randomly;

s33, adding the weighed water into the dry-mixed mixture, continuously stirring, completely stirring uniformly, adding the weighed alicyclic epoxy resin and the weighed rubber particles together, continuously stirring for 8-10 minutes, finally adding the weighed self-healing gel, and stirring for 1-3 minutes; the total time from the beginning of adding water to the completion of stirring is controlled within 30 minutes, and the whole stirring is carried out at a constant speed of 30-100 revolutions per minute.

The invention has the beneficial effects that:

1. compared with other forms, the protective structure is provided with more supporting protective frameworks, the protective framework with the specific structure is formed by a plurality of straight strip-shaped basic units into a plurality of complete and stable triangular structures, the stability is good, the problem that the water passing area of the water collecting part of the drainage channel is increased sharply in heavy rainfall weather is effectively solved, rainwater is prevented from rushing out of the drainage channel in heavy rainfall weather due to unsmooth water collection, the rainfall is prevented from scouring the surface of the side slope, the water collecting part of the drainage channel is effectively protected, the drainage performance and the stability are considered, and the damage of the rainwater to the side slope is reduced.

2. The protective structure disclosed by the invention is poured by adopting self-healing flexible concrete, can resist the scouring deformation of soil, can be self-repaired under the condition that the protective structure is locally and slightly damaged, ensures the connection tightness of the protective structure and the slope surface, and effectively solves the problem that the protective structure loses the protective function continuously and finally loses stability once the protective structure in the prior art is damaged and cannot be repaired in time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a protective framework according to an embodiment of the present invention.

Fig. 2a is a schematic view of a top partial structure of the protective framework according to the embodiment of the invention.

Fig. 2b is a schematic view of a partial structure of the bottom end of the protective framework according to the embodiment of the invention.

Fig. 3 is a schematic cross-sectional structure diagram of a protective framework according to an embodiment of the invention.

Fig. 4 is a schematic diagram of a framework template of a protective framework according to an embodiment of the invention.

FIG. 5 shows the effect of the rubber particle content on the self-healing flexible concrete according to the embodiment of the invention.

FIG. 6 shows the effect of high strength fiber content on self-healing flexible concrete according to an embodiment of the present invention.

FIG. 7 is a graph showing the change of mechanical properties of the concrete according to the embodiment of the present invention and the general concrete with the increase of load.

In the figure, 1, a protective framework, 2, a drainage structure, 3, a first L-shaped structural unit, 4, a second L-shaped structural unit, 5, a claw-shaped structural unit, 6, a transverse protective framework, 7, a vertical protective framework, 8, a middle protective framework, 9, a left inclined protective framework, 10, a right inclined protective framework, 11, a base body, 12, a stair, 13, a vegetation layer, 14, a drainage channel, 15, a water chute, 16, a hollow circular ring, 17, a fixing hole, 18, a soil nail and 19 an expansion joint are arranged.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

This embodiment can self-healing flexible concrete slope protective structure, as shown in fig. 1, including the same protection skeleton 1 of a plurality of structures, a plurality of protection skeleton 1 array is arranged and is formed a plurality of triangle-shaped stable structure, and every triangle-shaped is inside to be equipped with vegetable layer 13.

As shown in fig. 1-3, each protection framework 1 is composed of a first L-shaped structural unit 3, a second L-shaped structural unit 4 and a claw-shaped structural unit 5, and has a four-triangle stable structure, so that the protection framework 1 is more stable, and the stability of the side slope is ensured, wherein the upper surfaces of the first L-shaped structural unit 3, the second L-shaped structural unit 4 and the claw-shaped structural unit 5 are flush; the opening of the claw-shaped structure unit 5 is downward, the first L-shaped structure unit 3 and the second L-shaped structure unit 4 are respectively arranged at two sides of the claw-shaped structure unit 5, the structures of the first L-shaped structure unit 3 and the second L-shaped structure unit 4 are bilaterally symmetrical, the openings are opposite, the end surfaces of the branch parts of the first L-shaped structure unit 3 and the second L-shaped structure unit 4 are matched with the shapes of the corresponding positions of the claw-shaped structure unit 5, and a space exists between the end surfaces of the branch parts to form a water chute 15; protection skeleton 1 in the same row in close contact with, have the interval to form drainage channel 14 between the adjacent protection skeleton 1 in the same row, guiding gutter 15 and drainage channel 14 constitute drainage structures 2 jointly, and the rainwater flows down along protection skeleton 1 edge when the rainfall, and the rainwater collects to drainage channel 14 discharge side slope through guiding gutter 15, and the remaining ponding water conservancy diversion that will protect skeleton 1 inside is inside protecting skeleton 1, prevents that the rainwater from collecting thereby to lead to soil body intensity to reduce and cause the side slope unstability to destroy.

In some embodiments, the claw-shaped structural unit 5 is composed of a middle protective framework 8, a left inclined protective framework 9 and a right inclined protective framework 10; the first L-shaped structure unit 3 and the second L-shaped structure unit 4 are both composed of a transverse protection framework 6 and a vertical protection framework 7, the upper ends of the first L-shaped structure unit 3 and the vertical protection framework 7 of the second L-shaped structure unit 4 on two sides of the drainage channel 14 are inclined towards the direction away from each other, so that the width interval of the drainage channel 14 is changed, the width of a three-branch joint connected by the longitudinally adjacent protection frameworks 1 on the side of the drainage channel 14 is narrowed and widened (namely widened), a large amount of residual accumulated water beneficial to the internal structure of the protection framework 1 can quickly flow into the drainage channel 14 along the water guide groove 15, and meanwhile, water splashing caused by water flow collision when rainwater is collected at the three-branch joint is reduced, so that the rapidly increased water flow is conveniently discharged, and the dredging efficiency of water accumulated on the slope surface after rainfall is effectively improved; the soil softening caused by the fact that accumulated water is difficult to drain in the soil body in the protective framework 1 after rainfall is reduced, the degradation degree of the mechanical property of the soil body is effectively reduced, and the soil body under the protective framework 1 is prevented from being hollowed and unstable on the side slope due to the soil body loss caused by rain wash. The slope bottom is provided with a drainage ditch, and the drainage ditch is used for draining accumulated water generated when the slope protection structure falls into rain and conveying the drained water to lakes and other places.

In some embodiments, the range of the inclination angles of the lower ends of the vertical parts of the first L-shaped structure unit 3 and the second L-shaped structure unit 4 is 5-15 °, which ensures optimization of the drainage structure and increases the strength of the drainage structure, if the inclination angle is too large, the drainage area of the drainage channel 14 body is reduced, which is difficult to play a role in guiding and rapidly dredging the rapidly increased water flow in the drainage channel 14, and if the inclination angle is too small, the water chute 15 is washed by the water flow for a long time, which affects the strength and the service life of the drainage structure. The width of the water chute 15 is 10-15 cm, and as the width of the water chute 15 is too small, unsmooth drainage can occur when water flow is turbulent; and if the width of the water chute 15 is too large, the integrity of the self-healing flexible concrete protective structure is obviously reduced, and the capability of maintaining the slope stability for a long time is reduced. In some embodiments, the width of the gutter 15 is 12 cm.

In some embodiments, the topmost and bottommost vertical protective frameworks 7 on both sides of the drainage channel 14 are not inclined, the width of the topmost end of the drainage channel 14 is the same as the narrowest distance between two adjacent vertical protective frameworks 7 in the lower layer, because the top of the side slope bears little load, and the upper end of the drainage channel is not provided with a water chute 15 for guiding accumulated water into the side slope protective framework 1 at the position, the vertical drainage structure can meet the drainage requirement. The width of the bottommost end of the drainage channel 14 is the same as the widest position of the distance between the two adjacent vertical protective frameworks 7 on the upper layer, so that water flow can be collected and guided out of the drainage channel more conveniently. The lower end distance between two adjacent vertical protection frameworks 7 on two sides of the same drainage channel 14 is the same, the lower end distance between two adjacent vertical protection frameworks 7 is 10 cm-40 cm, and the inclination of the vertical protection frameworks 7 on two sides of the same drainage channel 14 is the same.

In some embodiments, the widths of all the obliquely arranged vertical protective frameworks 7 are gradually increased from top to bottom, the sides of the vertical protective frameworks 7 away from each other are vertical, the lower ends of the sides of the vertically arranged protective frameworks 7 close to each other are inclined towards the direction close to each other, that is, the width change of the drainage channel 14 is realized through the width change of the vertical protective frameworks 7, the position relation between the bottom of the vertical protective frameworks 7 and the claw-shaped structure unit 5 is not influenced, the lower end of the side of the obliquely arranged vertical protective frameworks 7 close to each other is provided with an inclined surface for enlarging a lower port, the upper end of the obliquely arranged vertical protective framework 7 below the inclined surface is provided with an inclined surface for enlarging the lower port, so that the water flow at the narrowest part of the drainage channel 14 in width smoothly flows out, the drainage efficiency of rainwater when the water flow is collected at the three-branch point is further improved, and the scouring of the protective frameworks by the rainwater is reduced, the slope stability is enhanced.

In some embodiments, the stairs 12 are arranged on two sides of the slope structure, so that workers can conveniently go up and down the slope after construction is finished, and monitoring of the slope and maintenance of the protective framework 1 are realized; the vertical protective frameworks 7 of the first L-shaped structural unit 3 and the second L-shaped structural unit 4 close to the staircase 12 are vertical structures.

As shown in fig. 4, the longitudinal section of the drainage channel 14 is U-shaped, the width of the drainage channel 14 is 0.4 to 0.6m, the width of the bottom of the drainage channel 14 is 0.4 to 0.6m, the bottom of the drainage channel 14 is provided with a strip-shaped base body 11 with the height of 0.3m and the width of 0.4m, the width of the vertical protective frameworks 7 on both sides of the drainage channel 14 is 0.1m and the height of 0.1m, the clear width of each protective framework 1 is 4m, and the clear height is 3 m; if the width of the drainage channel 14 is less than 0.4m, only the actual drainage width of 0.2m is less after the vertical protection frameworks 7 of the first L-shaped structural unit 3 and the second L-shaped structural unit 4 are removed, so that rainfall accumulated water cannot be drained quickly under the condition of heavy rainfall, the longer the time of the accumulated water remaining in the protection framework 1 is, the longer the softening time of rainwater to the soil body is, and the larger the reduction of the mechanical property of the soil body is; if the width is greater than 0.6m, though make the actual drainage usable floor area increase of drainage canal 14, the drainage function reinforcing, but can make the slope surface too big by the partial area that the flexible concrete skeleton of self-healing occupied, lead to the area reduction of protection skeleton 1, the scope that the grass can be planted to the side slope reduces, makes the quantity of the flexible concrete of self-healing increase, has increased the cost of construction.

The protective framework 1 is a poured self-healing flexible concrete framework solid structure, the self-healing flexible concrete enables the protective framework 1 to have flexibility so as to bear certain structural deformation, structural damage to the protective framework 1 in a natural environment is not prone to crack, crack or break of the protective framework 1, the use performance of the protective framework 1 is improved, and the effect of prolonging the service life of the slope protective framework 1 is achieved; pour, natural curing is finished at protection skeleton 1 and drainage structures 2, spray or evenly apply paint with a brush self-healing gel layer to protection skeleton 1 and drainage structures 2's surface, play the guard action, receive external environment at protection skeleton 1 and drainage structures 2 and cause the damage time can in time carry out self-healing repair and handle.

Inside being hollow of frame template of protection skeleton 1, constitute by the metal iron sheet all around, be the shape stability invariance in order to guarantee the protection skeleton when carrying out the flexible concrete pouring of self-healing on the spot to drawing of patterns that can be better after the flexible concrete pouring of self-healing finishes, probably have adhesion and hole to lead to the flexible concrete protection skeleton of self-healing to pour the shape change like ordinary wooden template, take out the template frame after the flexible concrete protection skeleton 1 of self-healing pours the maintenance to the initial set. The template frame is after the bottom self-healing flexible concrete pouring maintenance of protection skeleton 1 and drainage structure 2 finishes when the side slope protection, continues protection skeleton 1 superstructure and carries out a moulding appurtenance of concrete pouring, and protection skeleton 1 widens and sets up and embodies by the template frame of difference.

The self-healing flexible concrete comprises the following components in parts by weight: 870-930 parts of fine aggregate, 820-880 parts of coarse aggregate, 422-462 parts of cement, 230-260 parts of water, 13-20 parts of alicyclic epoxy resin, 5-20 parts of rubber particles, 6-10 parts of high-strength fiber and 5-9 parts of self-healing gel.

The Self-Healing gel in the embodiment is an Ultra-Fast Self-Healing Hydrogel based on an agarose/polyvinyl alcohol double network, wherein Air and water both have Ultra-Fast Self-Healing hydrogels (Hydrogel with Ultra-Fast Self-Healing Property in Air and under water), PVA and borax form a network through dynamic covalent crosslinking reaction, borate ions can be complexed with adjacent PVA hydroxyl groups, the complexation of the borate ions and the PVA hydroxyl groups is reversible, the Self-Healing gel has extremely Fast Self-Healing capability under the condition of no external stimulation by utilizing the combination of dynamic borate, the strength and the elongation of the gel can reach 100% after the gel heals in the Air for 10 seconds, and the Self-Healing gel also has excellent Self-Healing performance under water; because the self-healing gel has the intelligent self-healing characteristic of in-situ preferential recovery, the damage can be repaired preferentially, the gel plays an important role in maintaining the material performance, and the shape and the function are ensured to be the same as the original state.

In the embodiment, the fine aggregate is medium sand with fineness modulus of 2.7-3.3 and particle size of 0.075-2 mm; selecting macadam with the maximum grain diameter not larger than 20mm and the minimum grain diameter not smaller than 5mm as the coarse aggregate; the cement with the strength grade of 425# is selected as the cement; the alicyclic epoxy resin can enhance the gelling property and the bending resistance between self-healing flexible concrete, has the characteristics of high adhesive force and good mechanical property of a condensate, has strong durability to temperature, has higher adhesive strength under the conditions of high-temperature environment and ultralow-temperature environment, and can improve the adaptability of a self-healing flexible concrete member to outdoor temperature while improving the adhesive property between high-strength special fiber and cement mortar; the rubber particles as the filler can effectively fill the inner pores of the coarse and fine aggregates of the self-healing flexible concrete, so that the elasticity of the self-healing flexible concrete is increased, cracks and bending of the self-healing flexible concrete in the using process are reduced, and the flexibility of the self-healing flexible concrete member is improved; novel synthetic fiber is selected for use to high strength fiber, can strengthen the intensity and the toughness of self-healing flexible concrete, can prevent the crack to expand in self-healing flexible concrete, can show the pulling force when the microfracture will appear in self-healing flexible concrete and tie self-healing flexible concrete, make the crack can not expand, thereby strengthen the pliability of self-healing flexible concrete, and this kind of high strength fiber still has stronger wearability and resistant chemical corrosion nature, make it keep mechanical properties in self-healing flexible concrete for a long time, thereby make the life of self-healing flexible concrete longer.

Mix high strength fiber's tow uniformly in the concrete, add alicyclic epoxy's gelatinization nature and rubber granule's elasticity, the self-healing flexible concrete that obtains all has great promotion in the aspect of pliability or intensity, this self-healing flexible concrete has low cost, advantages such as preparation convenience, the better characteristics of cohesion and pliability have simultaneously, this self-healing flexible concrete is more durable firm than traditional concrete, adaptability to external environment is stronger, very big extension protection skeleton 1's life-span.

The high-strength fiber is polyacrylonitrile fiber, the diameter of the fiber is 13 microns, the fiber has high tensile strength, large initial modulus and stable chemical performance, the fiber has acid and alkali corrosion resistance, light resistance and weather resistance, good dispersibility and strong bond stress with a concrete matrix, the bonding property and fatigue resistance of the concrete can be improved, the anti-permeability, anti-freezing and anti-impact capabilities of the concrete are enhanced, so that the concrete bears more load stress, and the bending toughness of the fiber is improved by more than 6 times compared with that of plain concrete; the paint has strong wear resistance and chemical corrosion resistance, and can maintain good mechanical properties under the dry and wet cycle conditions of high-intensity insolation-rainfall and the like in an outdoor environment; rainfall can appear when the side slope protection makes the soil body hollowing out and self-healing flexible concrete skeleton by circumstances such as torrent erode, and the gelatinization nature and the bearing deformability of self-healing flexible concrete are jointly strengthened to alicyclic epoxy and rubber granule to fill the hole in the self-healing flexible concrete structure, self-healing nature aquogel can carry out self-healing to self-healing flexible concrete component simultaneously.

The embodiment provides a construction method of a self-healing flexible concrete slope protection structure, which comprises the following specific steps:

s1, carrying out slope cutting treatment on the side slope to be protected according to the designed slope-releasing ratio, digging a groove and leveling;

adopting a vertical face excavation mode from top to bottom for slope cutting excavation, arranging a reverse filtering ditch for guiding and filtering, and discharging the seepage water on the slope surface; leveling the surface of the side slope after finishing slope cutting, and excavating a groove of the protective framework 1 after leveling, wherein the depth of the groove of the drainage structure is 0.6m, and the width of the groove is 0.5 m; the depth of the groove of the protective framework 1 is 0.6m, and the width of the groove is 0.1 m. The protective framework 1 is integrally formed by the groove finger claw type structural units 5 and the parts needing to be excavated of the transverse part pouring parts of the first L-shaped structural units 3 and the second L-shaped structural units 4. The drainage structure groove refers to a part which is required to be excavated by a drainage channel part comprising vertical parts of the first L-shaped structure unit 3 and the second L-shaped structure unit 4 and a pouring part of an actual drainage area of the drainage channel 14. Because the excavation section of the groove is smaller, manual excavation from top to bottom is adopted; and correcting and leveling the excavated groove, wherein the leveling flatness of the slope surface is controlled by two steel grooves arranged on the two frames.

S2, vertically digging a plurality of spaced cylindrical fixing holes 17 at the position of the leveled drainage channel 14 by using a punching machine, wherein the distance between the fixing holes 17 is 0.75m, the digging depth of the fixing holes 17 is 0.3m, and the digging diameter is 0.15 m; when the self-healing flexible concrete layer is poured, the hollow circular ring 16 is placed in the fixing hole 17, the height of the hollow circular ring 16 is 0.6m, and the diameter of the hollow circular ring is 0.13 m.

S3, arranging segmented partition plates at the junctions of the drainage channels 14 and the left and right protective frameworks 1, pouring self-healing flexible concrete layers on the slope, and leveling the surface; when the self-healing flexible concrete layer is initially set, the hollow circular ring 16 is removed; before the self-healing flexible concrete is initially set, the sectional partition plates are removed to form an expansion joint 19; the width of segmentation baffle is 2cm, and each section protection skeleton 1 sets up the position of segmentation baffle, just should leave a gap in this department after self-healing flexible concrete initial set demolishs, and expansion joint 19 promptly fills up the pitch hemp silk in the gap, and protection skeleton 1 is difficult for the uplift to destroy when guaranteeing expend with heat and contract with cold, and the protection skeleton expend with heat and contract with cold reservation flexible space that weather change caused when being convenient for change in season makes protective structure difficult because its own structural expansion leads to the uplift to destroy.

When the self-healing flexible concrete layer is poured on the slope, the self-healing flexible concrete layer is constructed in a segmented mode from top to bottom and from left to right, an inserted vibrating rod is used for vibrating and compacting, and the surface of the self-healing flexible concrete layer is trowelled after pouring is finished; and naturally curing the self-healing flexible concrete layer until the self-healing flexible concrete layer is condensed, and performing watering curing according to the temperature in a specific month until the curing is finished.

The preparation method of the self-healing flexible concrete comprises the following steps:

s31, weighing 870-930 parts of fine aggregate, 820-880 parts of coarse aggregate, 422-462 parts of cement, 230-260 parts of water, 13-20 parts of alicyclic epoxy resin, 5-20 parts of rubber particles, 6-10 parts of high-strength fiber and 5-9 parts of self-healing gel according to the following parts by weight;

s32, dry-mixing the weighed fine aggregate, coarse aggregate, cement and high-strength fiber, namely adding the weighed materials in sequence, and uniformly mixing the materials in the process of mechanical stirring or manual stirring and mixing, wherein the stirring time is 10-20 minutes; wherein, the high-strength fiber is discharged at last, and the stirring sequence of the fine aggregate, the coarse aggregate and the cement is adjusted randomly;

s33, adding the weighed water into the dry-mixed mixture, continuously stirring for 10-15 minutes, completely stirring uniformly, adding the weighed alicyclic epoxy resin and the weighed rubber particles together, continuously stirring for 8-10 minutes, finally adding the weighed self-healing gel, and stirring for 1-3 minutes; the total time from the beginning of adding water to the completion of stirring is controlled within 30 minutes, and the whole stirring is carried out at a constant speed of 30-100 revolutions per minute.

S4, after the self-healing flexible concrete layer is naturally cured to be condensed, pouring protective frameworks 1 on the self-healing flexible concrete layer through the self-healing flexible concrete, wherein the expansion joints 19 are shielded by the protective frameworks 1, a plurality of protective frameworks 1 are arranged in an array mode to form a plurality of triangular stable structures, the protective frameworks 1 in the same row are in close contact, drainage channels 14 are arranged between adjacent protective frameworks 1 in the same row, and the natural curing is completed until the condensation; the slope protection mode of the protection framework 1 mainly solves the problem of small landslide of the shallow surface layer of the side slope soil body, and the slope release ratio of the side slope is generally 1: undisturbed soil slopes below 1.5 can be suitable. The width of the stairs 12 at the two sides of the protective framework 1 is 0.8m, and the depth of the embedded soil body is 0.3 m.

The lower parts of the first L-shaped structural unit 3, the second L-shaped structural unit 4 and the claw-shaped structural unit 5 are all the bottom parts of self-healing flexible concrete structures of protective structures, and need to be poured in advance during construction, so that the protective structures are molded again on the bottom layer structure after initial setting by using a template frame; after natural curing is carried out to the end of condensing at protective structure's self-healing flexible concrete structure bottom, place various template frames at the protective framework 1 of superiors ' protective framework 1 and lower floor's protective framework 1, all placed inclination's protective framework 1 except that the protective framework 1 of superiors ' protective framework 1 and lower floor, connect into an organic whole protective structure after the final curing is ended.

S5, driving the soil nails 18 into the fixing holes 17 until the outermost ends of the soil nails 18 are flush with the bottom surface of the drainage channel 14; the soil nail 18 is 10m long, and the diameter is 0.13m, and embedding drainage channel 14 bottom degree of depth is 10m to the one section opening that soil nail 18 was beaten into the soil body is smashed flat, conveniently beats into the soil body. When the soil nails 18 are driven in, a machine is used for tamping and striking, and cement paste is pressed into the soil nails 18 from the openings of the soil nails 18 after tamping is finished. The soil nails 18 mainly depend on group action to protect the side slope, and even if some soil nails 18 fail due to quality reasons or environmental reasons, the soil nails 18 around the soil nails and the soil nails 18 in the upper row and the lower row and the same row share the load given by the side slope. The soil nails 18 can not only protect deep soil on the side slope, but also play a role in fixing the position of the protective framework 1, prevent the self-healing flexible concrete framework from sliding and destabilizing on the side slope, and protect the side slope deeply.

S6, spraying or uniformly painting a plurality of layers of self-healing gel on the outer surfaces of the self-healing flexible concrete of the protective framework 1 and the drainage structure 2, and performing double-layer repairing on the self-healing flexible concrete to enable the cracked part or the damaged part of the protective framework 1 to be repaired preferentially. The self-healing gel is heated to a flowing state, and needs to be stirred continuously in the heating process, so that the problem that the bottom of the self-healing gel is adhered or the self-healing gel is blocked or the flowability is insufficient due to uneven stress of the whole self-healing gel is solved. The brushing time is 3-5 times, the time interval of each time is ten minutes, and the thickness of each brushing time is 3-5 mm. The self-healing gel can be filled to the constructed joint by spraying, so that the repair of the structural weak part of the protective framework 1 is ensured; for example, pour into the fixed orifices 17 with mobility self-healing gel to overflowing, fix the position of soil nail 18 in fixed orifices 17, self-healing gel gets into the gap of fixed orifices 17 and soil nail 18 for with outside flexible concrete layer parallel and level of self-healing, not only can fix soil nail 18 position, can be firmer with the drainage channel 14 position department of this department with self-healing gel moreover, make the node more difficult destruction. The self-healing gel is painted in the water chute 15 in multiple layers, so that the protective framework 1 is stronger in self-healing property and is less prone to damage.

S7, after the natural maintenance of the integral side slope protection framework 1 is finished, hanging nets on the side slope, wherein the hanging nets adopt the unreeling mode from top to bottom and from left to right, and adjacent hanging nets on the same side slope layer are bound by iron wires.

S8, uniformly stirring the treated plant seeds, fibrous tissues, gelling agents, water-retaining agents, nutritional fertilizers and slurry, uniformly spraying the mixture into each triangle of the protective framework 1 through a spray-seeding machine to form a vegetable layer 13, and further preventing water and soil loss through plant ecological protection. The spray seeding thickness is 3-5 cm, the spray seeding sequence is from top to bottom, the process is carried out from left to right, the distance between a spray gun opening and a slope surface is about 1m approximately during spray seeding, the spray seeding is carried out on a vertical side slope, the upward spray, the downward spray or the oblique spray are avoided, the spray seeding process should be repeated back and forth, the spray seeding should not be carried out in a certain point position, and the uniform spray seeding thickness is ensured.

In the case of the example 1, the following examples are given,

870 parts of fine aggregate, 820 parts of coarse aggregate, 462 parts of cement, 230 parts of water, 13 parts of alicyclic epoxy resin, 5 parts of rubber particles, 10 parts of high-strength fiber and 5 parts of self-healing gel are weighed according to the following parts by weight.

In the case of the example 2, the following examples are given,

900 parts of fine aggregate, 850 parts of coarse aggregate, 450 parts of cement, 250 parts of water, 18 parts of alicyclic epoxy resin, 8 parts of rubber particles, 6 parts of high-strength fiber and 7 parts of self-healing gel are weighed according to the following parts by weight.

In the case of the example 3, the following examples are given,

930 parts of fine aggregate, 880 parts of coarse aggregate, 422 parts of cement, 260 parts of water, 20 parts of alicyclic epoxy resin, 20 parts of rubber particles, 8 parts of high-strength fiber and 9 parts of self-healing gel are weighed according to the following parts by weight.

In the case of the example 4, the following examples are given,

870 parts of fine aggregate, 880 parts of coarse aggregate, 462 parts of cement, 260 parts of water, 13 parts of alicyclic epoxy resin, 15 parts of rubber particles, 10 parts of high-strength fiber and 9 parts of self-healing gel are weighed according to the following parts by weight.

In the case of the example 5, the following examples were conducted,

870 parts of fine aggregate, 880 parts of coarse aggregate, 462 parts of cement, 260 parts of water, 13 parts of alicyclic epoxy resin, 4 parts of rubber particles, 10 parts of high-strength fiber and 9 parts of self-healing gel are weighed according to the following parts by weight.

In the case of the example 6, it is shown,

870 parts of fine aggregate, 880 parts of coarse aggregate, 462 parts of cement, 260 parts of water, 13 parts of alicyclic epoxy resin, 30 parts of rubber particles, 10 parts of high-strength fiber and 9 parts of self-healing gel are weighed according to the following parts by weight.

In the case of the example 7, the following examples are given,

870 parts of fine aggregate, 880 parts of coarse aggregate, 462 parts of cement, 260 parts of water, 13 parts of alicyclic epoxy resin, 40 parts of rubber particles, 10 parts of high-strength fiber and 9 parts of self-healing gel are weighed according to the following parts by weight.

In the case of the example 8, the following examples are given,

870 parts of fine aggregate, 880 parts of coarse aggregate, 462 parts of cement, 260 parts of water, 13 parts of alicyclic epoxy resin, 15 parts of rubber particles, 4 parts of high-strength fiber and 9 parts of self-healing gel are weighed according to the following parts by weight.

In the case of the example 9, the following examples are given,

870 parts of fine aggregate, 880 parts of coarse aggregate, 462 parts of cement, 260 parts of water, 13 parts of alicyclic epoxy resin, 15 parts of rubber particles, 12 parts of high-strength fiber and 9 parts of self-healing gel are weighed according to the following parts by weight.

In the light of the above example 10,

870 parts of fine aggregate, 880 parts of coarse aggregate, 462 parts of cement, 260 parts of water, 13 parts of alicyclic epoxy resin, 15 parts of rubber particles, 20 parts of high-strength fiber and 9 parts of self-healing gel are weighed according to the following parts by weight.

In the comparative example 1,

the common concrete is prepared by weighing 0.51 part of water, 1 part of cement, 1.81 parts of sand and 3.68 parts of stones according to the following parts by weight.

In the embodiment, the relationship curve of the flexibility and the mechanical property of the rubber particles and the high-strength fibers of the self-healing flexible concrete under different mixture ratios is shown in fig. 5-6; the abscissa of fig. 5 represents the self-healing flexible concrete with rubber particles in different proportioning conditions, the ordinate represents the trend line of the elastic modulus and the compressive strength of the self-healing flexible concrete in different proportioning conditions, the performance of the self-healing flexible concrete is most favorably represented by 1, the abscissa of fig. 6 represents the self-healing flexible concrete with high-strength fiber content in different proportioning conditions, the ordinate represents the trend line of the deformability and the tensile strength of the self-healing flexible concrete in different proportioning conditions, and the best performance is also represented by 1. The self-healing flexible concrete is selected to be suitable for different slope types according to the performances of different proportions of the two materials. In the embodiment, the strength of the self-healing flexible concrete can be adjusted by the mixing amount change of the rubber particles and the high-strength fibers, when the mixing amount of the rubber particles is 5-8 parts, the self-healing flexible concrete structure is small in elastic modulus and deformation, and is generally suitable for protection of harder rock slopes; when the mixing amount of the rubber particles is 9-15 parts, the self-healing flexible concrete can be suitable for protecting a soil slope; when the mixing amount of the rubber particles is 16-20 parts, the self-healing flexible concrete can be used for protecting a soft rock slope. The self-healing flexible concrete is reinforced on adhesiveness and elasticity which is not damaged after being interfered by the outside, and most importantly, even if the soil body is damaged by hollowing during protection, the self-healing flexible concrete also can have certain bending property and has the repair capability which is not provided by a common protection structure.

The larger the mixing amount of the rubber particles in the self-healing flexible concrete is, the larger the influence on the reduction of the shear strength of the self-healing flexible concrete is, and after the rubber particles are added into the self-healing flexible concrete, the internal bonding property of the self-healing flexible concrete is weakened, so that the reduction of the compression resistance of the self-healing flexible concrete is serious, and the attenuation degree of the viscosity of the self-healing flexible concrete is reduced due to the existence of the alicyclic epoxy resin in the self-healing flexible concrete. The tensile strength of the rubber fiber concrete is improved to a certain extent along with the increase of the fiber mixing amount, but the tensile property is firstly increased and then reduced along with the increase of the fiber mixing amount. The reason is that the steel fibers have a reinforcing effect within a certain mixing amount range, but as the mixing amount of the fibers is increased, the number of weak parts at the interface of a test piece is increased, so that the tensile property of the self-healing flexible concrete is reduced.

The deformation performance of the concrete is gradually improved along with the increase of the fiber mixing amount, because the fibers have the function of linear connection, and the deformation performance of the self-healing flexible concrete is also gradually improved along with the increase of the fiber mixing amount.

The mechanical property change of the self-healing flexible concrete prepared in the example 4 and the common concrete prepared in the comparative example 1 along with the increase of the load is shown as 7; compared with common self-healing hydrogel, the self-healing hydrogel in the embodiment also has the effect of increasing the strength of the damaged part after in-situ repair, can find out the weak area of the slope protection, provides an in-situ repair mode of the damaged part for an outdoor protective structure, and can prevent self-repair and healing when local microcracks occur in the protective structure due to the convergence of the deformation capacity, strength and repair capacity of the self-healing flexible concrete, so that the protective structure is further deteriorated under the action of the external environment; and the damaged part is self-repaired, and the strength of the self-healing gel at the damaged part after repair is improved by several times compared with that before damage, so that the vulnerable part of the protective structure can be better protected.

The self-healing flexible concrete obtained by the embodiment of the application has a large elastic modulus (deformability) range, and can be well self-repaired, such as: the large deformation of the side slope protection structure can be realized in the soil side slope, and the small deformation of the side slope protection structure can be realized along with the rock side slope; mechanical properties of the self-healing flexible concrete: the mechanical properties of the concrete are tensile strength and compressive strength when bearing various external loads (such as tension, compression, bending, torsion, impact, alternating stress and the like), and the tensile strength is obviously higher than that of common concrete; in addition, with present ordinary concrete's relevant parameter as the contrast, the self-healing flexible concrete that this application was made can be applicable to better in the protection of putting the slope to its application scope is wider.

The side slope is easily influenced by the conditions such as hollowing of the lower soil body under the natural environment to cause the conditions such as breaking, and other modes, such as smearing and spraying the side slope through self-healing hydrogel, cannot repair the side slope in time. The self-healing flexible concrete has the characteristics of bending resistance and flexibility, self-repairs the self-healing flexible concrete, and guarantees the mechanical property of the self-healing flexible concrete structure, so that the self-healing flexible concrete framework can be repaired in a series even if the self-healing flexible concrete framework is damaged under extremely severe conditions, the continuous protection capability is fully embodied, and the stability of the side slope is guaranteed.

After the protective structure is put into use, the self-healing flexible concrete is subjected to in-situ protection when damaged in the later period; protecting the skeleton part for preventing and treating the specific structure of the skeleton without causing huge damage once again, such as smearing self-healing gel on parts such as microcracks and the like or pouring at the cracks; and excavating the prevention and control framework which causes huge damage to the concrete structure of the framework and then protecting the framework. The side slope bottom has still settled all-weather surveillance camera head and has observed the concrete protective conditions of side slope protective structure, avoids protective structure to solve when the small damage, becomes the serious condition of huge destruction in outdoor proruption.

When the slope surface soil body below the protection side slope is locally sunk or washed, the protection structure can play a role of flexible deformation and can synchronously and coordinately deform along with the deformation of the slope surface of the side slope, so that the protection structure is prevented from being broken; and the self-healing flexible concrete has the functions of water resistance, seepage prevention and crack resistance, and can effectively improve the capability of the protective structure for resisting rain wash and high-temperature cracking, thereby prolonging the service life of the slope protective structure.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (8)

1. A self-healing flexible concrete slope protection structure is characterized by comprising a plurality of protection frameworks (1) with the same structure, wherein the protection frameworks (1) are arranged in an array manner to form a plurality of triangular stable structures, and a vegetation layer (13) is arranged inside each triangle; the protective frameworks (1) in the same row are closely contacted, and a drainage channel (14) is arranged between the adjacent protective frameworks (1) in the same row;

each protective framework (1) is composed of a first L-shaped structural unit (3), a second L-shaped structural unit (4) and a claw-shaped structural unit (5), and the upper surfaces of the first L-shaped structural unit (3), the second L-shaped structural unit (4) and the claw-shaped structural unit (5) are flush; the opening of the claw-shaped structure unit (5) is downward, the first L-shaped structure unit (3) and the second L-shaped structure unit (4) are respectively arranged at two sides of the claw-shaped structure unit (5), the structures of the first L-shaped structure unit (3) and the second L-shaped structure unit (4) are bilaterally symmetrical, the openings are opposite, the end faces of the branch parts of the first L-shaped structure unit (3) and the second L-shaped structure unit (4) are matched with the shapes of the corresponding positions of the claw-shaped structure unit (5) and have intervals, so that a water chute (15) is formed; a drainage channel (14) is formed between adjacent protective frameworks (1) in the same row at intervals, and the water chute (15) and the drainage channel (14) jointly form a drainage structure (2);

the claw-shaped structural unit (5) consists of a middle protective framework (8), a left inclined protective framework (9) and a right inclined protective framework (10); the first L-shaped structure unit (3) and the second L-shaped structure unit (4) are both composed of a transverse protection framework (6) and a vertical protection framework (7), the upper ends of the vertical protection frameworks (7) of the first L-shaped structure unit (3) and the second L-shaped structure unit (4) on two sides of the drainage channel (14) incline towards the direction away from each other, so that the width interval of the drainage channel (14) is changed, and the width of a three-branch node on two sides of the drainage channel (14) is widened from narrow;

the protective framework (1) is a solid structure formed by self-healing flexible concrete pouring.

2. A self-healing flexible concrete slope protection structure according to claim 1, characterized in that the width of the vertical protection frameworks (7) arranged in an inclined manner gradually increases from top to bottom, the side surfaces of the vertical protection frameworks (7) which are away from each other are vertical, the lower ends of the side surfaces of the vertical protection frameworks (7) which are close to each other incline toward the direction of the close to each other, and the lower ends of the side surfaces of the vertical protection frameworks (7) which are arranged in an inclined manner and are close to each other are provided with inclined surfaces for expanding lower ports.

3. A self-healing flexible concrete slope protection structure according to claim 1, wherein the topmost and bottommost vertical protection frameworks (7) on two sides of the drainage channel (14) are not inclined, the width of the topmost of the drainage channel (14) is the same as the narrowest distance between two adjacent vertical protection frameworks (7) on the lower layer, and the width of the bottommost of the drainage channel (14) is the same as the widest distance between two adjacent vertical protection frameworks (7) on the upper layer; the lower end intervals of two adjacent vertical protection frameworks (7) on two sides of the same drainage channel (14) are the same, and the gradients of the vertical protection frameworks (7) on two sides of the same drainage channel (14) are the same.

4. A self-healing flexible concrete slope protection structure according to claim 1, wherein the self-healing flexible concrete is composed of the following components in parts by weight: 870-930 parts of fine aggregate, 820-880 parts of coarse aggregate, 422-462 parts of cement, 230-260 parts of water, 13-20 parts of alicyclic epoxy resin, 5-20 parts of rubber particles, 6-10 parts of high-strength fiber and 5-9 parts of self-healing gel; the self-healing gel is a self-healing hydrogel based on an agarose/polyvinyl alcohol double network.

5. A self-healing flexible concrete side slope protection structure according to claim 1, wherein stairs (12) are arranged on two sides of the side slope protection structure, and vertical protection skeletons (7) of the first L-shaped structure unit (3) and the second L-shaped structure unit (4) close to the stairs (12) are vertical structures; the longitudinal section of the drainage channel (14) is U-shaped, and the bottom of the drainage channel (14) is provided with a strip-shaped base body (11).

6. A self-healing flexible concrete side slope protection structure according to claim 1, wherein the inclination angle of the lower end of the vertical protection framework (7) ranges from 5 degrees to 15 degrees, and the width of the water chute (15) ranges from 10cm to 15 cm.

7. The construction method of the self-healing flexible concrete slope protection structure according to any one of claims 1 to 6, characterized by comprising the following steps:

s1, carrying out slope cutting treatment on the side slope to be protected according to the designed slope-releasing ratio, digging a groove and leveling;

s2, vertically digging a plurality of spaced cylindrical fixing holes (17) at the position of the leveled drainage channel (14) by using a punching machine, and placing the hollow circular ring (16) in the fixing holes (17);

s3, arranging sectional partition plates at the junctions of the drainage channels (14) and the left and right protective frameworks (1), pouring self-healing flexible concrete layers on the slope, and trowelling the surface; when the self-healing flexible concrete layer is initially set, the hollow circular ring (16) is removed; before the self-healing flexible concrete is initially set, the sectional partition plates are dismantled to form an expansion joint (19);

s4, after the self-healing flexible concrete layer is naturally cured to be condensed, pouring protective frameworks (1) on the self-healing flexible concrete layer through the self-healing flexible concrete, arranging a plurality of protective frameworks (1) in an array mode to form a plurality of triangular stable structures, enabling the protective frameworks (1) in the same row to be in close contact with each other, arranging drainage channels (14) between adjacent protective frameworks (1) in the same row, and naturally curing to be condensed;

s5, driving the soil nails (18) into the fixing holes (17) until the outermost ends of the soil nails (18) are flush with the bottom surface of the drainage channel (14); after the soil nail (18) is driven in, cement paste is pressed in from the opening of the soil nail (18);

s6, spraying or uniformly brushing a plurality of layers of self-healing gel on the outer surface of the self-healing flexible concrete of the protective framework (1) and the drainage structure, wherein brushing is performed for 3-5 times, each time interval is 10 minutes, and each brushing thickness is 3-5 mm;

s7, after the natural maintenance of the integral side slope protection framework (1) is finished, hanging a net on the side slope;

s8, uniformly stirring the treated plant seeds, fibrous tissues, gelling agents, water-retaining agents, nutritional fertilizers and slurry, uniformly spraying the mixture into each triangle of the protective framework (1) through a spray-seeding machine, and spraying the mixture to a thickness of 3-5 cm.

8. A construction method of a self-healing flexible concrete slope protection structure according to claim 7, characterized in that the preparation method of the self-healing flexible concrete comprises:

s31, weighing 870-930 parts of fine aggregate, 820-880 parts of coarse aggregate, 422-462 parts of cement, 230-260 parts of water, 13-20 parts of alicyclic epoxy resin, 5-20 parts of rubber particles, 6-10 parts of high-strength fiber and 5-9 parts of self-healing gel according to the following parts by weight;

s32, dry-mixing the weighed fine aggregate, coarse aggregate, cement and high-strength fiber, namely adding the weighed materials in sequence, and uniformly mixing the materials in the process of mechanical stirring or manual stirring and mixing; wherein, the high-strength fiber is discharged at last, and the stirring sequence of the fine aggregate, the coarse aggregate and the cement is adjusted randomly;

s33, adding the weighed water into the dry-mixed mixture, continuously stirring, completely stirring uniformly, adding the weighed alicyclic epoxy resin and the weighed rubber particles together, continuously stirring for 8-10 minutes, finally adding the weighed self-healing gel, and stirring for 1-3 minutes; the total time from the beginning of adding water to the completion of stirring is controlled within 30 minutes, and the whole stirring is carried out at a constant speed of 30-100 revolutions per minute.

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