Slope supporting structure and construction process thereof

Abstract

The application discloses a kind of side slope supporting structure and its construction technology, including slope protection component, the slope protection component is by anchor rod, slope body, reinforcing bar, steel bar net, transverse well frame and vertical well frame composition, anchor rod is fixedly connected on slope body symmetry;The application, slope body is provided with good stable effect by slope protection component, and structure is relatively simple, improve construction efficiency;By preparing good drainage component in advance, excavate installation groove and can be quickly installed and used, provide good drainage function, and can be assisted drainage by redundant channel after filter screen is blocked, improve the use stability of equipment;By adding accelerator in concrete, and being conserved for a long time, both can significantly accelerate the coagulation of concrete and improve early strength, also ensure normal growth of strength to some extent, reduce and prevent shrinkage cracking, the method and spraying process of two times of concrete further improve the stability of slope surface, effectively avoid slope landslide.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slope protection construction, in particular to a slope support structure and a construction process thereof. BACKGROUND

[0002] Slope protection refers to the protective measures taken on the slope of highways, railways, bridges and water structures to prevent rainwater and groundwater from eroding the slope, maintain the stability of the slope and prevent slope erosion. It is an important measure to protect the stability and safety of the slope. By selecting appropriate slope protection methods and scientific construction methods, water erosion and slope instability can be effectively prevented, ensuring the safety and stability of infrastructure.

[0003] However, the existing slope protection construction still has some shortcomings. Firstly, the existing slope protection construction is relatively slow in construction efficiency in order to provide good stability for the slope. Secondly, the drainage facilities with good drainage function in the existing slope protection construction are not convenient to arrange and use, and it is difficult to continue draining after clogging, affecting the stability of the equipment. Thirdly, the existing slope protection construction has slow concrete setting, which cannot improve the early strength, and fast setting will cause shrinkage cracking, and there is no method and process for spraying concrete to further improve the stability of the slope surface, which cannot effectively prevent slope sliding. Therefore, it is necessary to design a slope support structure and a construction process thereof. SUMMARY

[0004] The present application aims to provide a slope support structure and a construction process thereof to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides a first technical solution:

[0006] A slope support structure, comprising a slope protection assembly, the slope protection assembly is composed of anchor rods, a slope body, reinforcing bars, a steel mesh, a horizontal cross-shaped frame and a vertical cross-shaped frame, the anchor rods are symmetrically fixedly connected to the slope body, the reinforcing bars are fixedly connected to the anchor rods, the steel mesh is fixedly connected to the anchor rods, the steel mesh is laid on the slope body, the horizontal cross-shaped frame is fixedly connected to the anchor rods, the horizontal cross-shaped frame is fixedly connected to the steel mesh, the vertical cross-shaped frame is fixedly connected to the steel mesh, the vertical cross-shaped frame is fixedly connected to the horizontal cross-shaped frame, the vertical cross-shaped frame is fixedly connected to the anchor rods, the slope body is fixedly connected to a drainage pipe in the drainage assembly, and the drainage pipe is fixedly connected to a waterproof board.

[0007] As a further technical scheme of the present application, the drainage assembly is composed of a drainage pipe, a waterproof plate, a mounting groove, a water guide frame, a water guide hole, filter material, a water guide plate, a water guide groove, a water drainage frame, a water drainage groove, a redundant channel, a filter plate, a filter screen, a base and a support column, the waterproof plate is fixedly connected to the mounting groove, the mounting groove is provided on the slope body, the mounting groove is fixedly connected with the water guide frame, the water guide frame is fixedly connected to the waterproof plate, the water guide hole is provided in the water guide frame, the filter material is fixedly connected in the water guide frame, the water guide plate is fixedly connected with the filter material, the water guide groove is provided in the water guide plate, the water guide plate is fixedly connected to the water drainage frame, the water drainage frame is fixedly connected to the water guide frame, the water drainage groove is provided in the water drainage frame, the redundant channel is fixedly connected to one end of the filter plate, the other end of the redundant channel penetrates through the water drainage frame and is fixedly connected to the drainage pipe, the drainage pipe penetrates through the waterproof plate, and the filter screen is fixedly connected to one end of the drainage pipe.

[0008] As a further technical scheme of the present application, the water drainage frame is fixedly connected to the base, the base is fixedly connected to the waterproof plate, one end of the support column is fixedly connected to the base in a symmetrical manner, and the other end of the support column is fixedly connected to the water guide frame.

[0009] The present application provides a second technical scheme:

[0010] A slope support structure construction process comprises the following steps:

[0011] Step one, investigating and excavating the slope surface to be constructed;

[0012] Step two, arranging drainage facilities;

[0013] Step three, arranging anchor devices on the slope surface to be constructed;

[0014] Step four, first-time concrete spraying;

[0015] Step five, hanging a mesh on the anchor devices;

[0016] Step six, second-time concrete spraying;

[0017] In the process, the first technical scheme is adopted in steps two, three and five.

[0018] As a further technical scheme of the present application, the step one is to excavate the slope from top to bottom, the preset position of each anchor rod (11) is an excavation layer, the excavation depth of each layer should be within 0.5m below the anchor rod of the layer, and timely support is provided, the thickness of each layer of soil is not more than 2m, and the length is not more than 40m.

[0019] Before construction, the buried condition of surrounding buildings must be known, and the construction of the reinforcing bar must be checked to see whether it will damage the buildings, and attention must be paid to avoiding and protecting the buildings, and when obstacles are encountered, the construction must be stopped immediately, and the construction can be continued after the causes are found out.

[0020] As a further technical scheme of the present application, in step two, the water guide frame, the water draining frame and the base are welded on the waterproof material made water stop plate, the support column made of steel bars is welded between the base and the water guide frame, the filter material and the water guide plate are respectively placed on the water guide frame, the drainage pipe is welded with the water stop plate, the filter screen is installed on one end of the drainage pipe, and the redundant channel welded with the filter plate is connected on the water draining frame and the drainage pipe, the interface of the redundant channel connected on the water draining frame is located near the top of the water draining frame, the installation groove with the size of the water stop plate and the base is excavated on the repaired slope, the drainage assembly is placed in the installation groove, the drainage pipe is ensured to be inclined downward at an angle of 15°, then the installation groove is backfilled to ensure the stability of the drainage assembly, and the slope surface is repaired again.

[0021] As a further technical scheme of the present application, in step three, the slope surface after repair is reinforced by anchor rods, the transverse spacing of the anchor rods is 2.0 m, the vertical spacing of the anchor rods is 2.0 m, φ25 steel bars are used, the drilling diameter is 130 mm, the incident angle is 15°, cement slurry is injected into the whole hole, and the strength of the grouting body is not less than M30; the reinforcing bar is placed at the reinforcing bar position, the anchor rod is inserted by using the direct striking process of the reinforcing bar, and then the reinforcing rib is welded between each anchor rod.

[0022] The cement slurry comprises the following components in mass percentage: 42.5R portland cement 15%, coarse aggregate 25%, fine aggregate 25%, naphthalene sulfonate formaldehyde condensate 0.5%, and water in the remainder.

[0023] As a further technical scheme of the present application, in step four, the slope body after the anchor rod and the reinforcing rib are installed is sprayed with concrete, the spraying of the concrete is sequentially performed in sections, the spraying sequence in the same section should be from bottom to top, and the first spraying thickness is 80 mm.

[0024] The concrete comprises the following materials in mass ratio: 42.5R portland cement, fine aggregate, coarse aggregate with a particle size of less than 15 mm, water, naphthalene sulfonate formaldehyde condensate, and sodium sulfate in a mass ratio of 500:800:800:200:3:5.

[0025] The operation sequence of the spraying machine is: when starting, air should be supplied first, then the motor is started, and finally the material is fed; when stopping, the feeding should be stopped first, then the motor is turned off, and finally the air is stopped; when spraying, the nozzle should be perpendicular to the sprayed surface as much as possible, the distance is preferably 0.6-1.2 m, and the spiral is formed by drawing a circle with a diameter of 30-50 cm; the air pressure is controlled by the sprayer, and the air pressure is usually adjusted to 120-180 Pa, and the conveying distance is 40-60 m; as the conveying distance increases, the air pressure needs to be appropriately increased; if the air pressure is too large, the rebound rate will increase; if the air pressure is too small, the spraying distance of the material bundle will be short, and it is difficult to reach the spraying surface; in the reinforcing bar part, the lower part of the reinforcing bar should be sprayed first, and then the upper part of the reinforcing bar is sprayed; the water-cement ratio should be controlled during spraying, and the concrete surface should be kept flat, wet and smooth, without dry spots and sliding flow phenomena.

[0026] The newly sprayed concrete should be watered and maintained to keep the surface wet, and the maintenance period is not less than 14 days since 2 hours after the initial setting of the sprayed concrete; because a certain amount of accelerating agent and water reducing agent is mixed in the sprayed concrete, the setting of the concrete is accelerated, the early strength is improved, and the hydration of the cement is inhibited to a certain extent, so that larger shrinkage deformation is prone to occur; therefore, a longer maintenance period must be kept to ensure the normal growth of the strength and reduce and prevent shrinkage cracking.

[0027] As a further technical solution of the application, in step five, the steel mesh should be firmly connected with the anchor rod and other anchoring devices, and the steel mesh should not shake during spraying of the concrete; the Φ8@200*200 bidirectional steel mesh is bound according to the design requirements, the reinforcement is arranged in two directions, the joints of adjacent steel bars are staggered by 300 mm, the steel mesh is hung on the anchor rod after being prepared, and the horizontal and vertical cross-shaped frames are electrically welded on the anchor rod and the steel mesh to ensure that the horizontal and vertical cross-shaped frames are tightly pressed on the steel mesh.

[0028] As a further technical solution of the application, in step six, the slope body after being provided with the anchor rod, the reinforcing bar, the steel mesh, the horizontal cross-shaped frame and the vertical cross-shaped frame is sprayed with the second time, the second spraying thickness is 70 mm, and the specific spraying operation is the same as that of the first spraying; after completion, the above process is repeated until the end of the project.

[0029] Compared with the prior art, the application has the following beneficial effects:

[0030] 1. The technical solution provided by the application has good slope stabilization effect, simple structure, convenient operation and high construction efficiency.

[0031] 2. The technical scheme provided by the present application improves the stability of the slope body significantly by fixing the anchor rod and the reinforcing rib and arranging the steel mesh, reduces the probability of accidents such as slope landslide, and is suitable for various slope bodies such as soil slope and rock slope, and has a wide application prospect.

[0032] 3. The drainage system provided by the technical scheme has the water stop plate to prevent water erosion of the slope body, prolongs the service life of the slope body, and the water guide frame and the water guide hole transmit the seepage water to the filter material for primary filtration, ensures that the seepage water is effectively treated; the water guide plate guides the seepage water to the water drainage frame through the water guide groove and the water drainage groove for secondary filtration, and the seepage water is discharged through the drainage pipe; when the filter screen is blocked, auxiliary drainage can be performed through the redundant channel to ensure long-term stable operation. Through such a drainage system, the stability of the slope body is improved, and the maintenance cost and construction delay caused by water damage are reduced, thereby providing a powerful guarantee for the long-term safety of the project.

[0033] 4. The technical scheme provided by the present application uses 42.5R portland cement, coarse aggregate, fine aggregate, and naphthalene sulfonate formaldehyde condensate to form the slurry, has good fluidity, can fully penetrate into the tiny cracks of the slope body, has high compressive strength, bending strength, and impermeability, and ensures the strength and stability of the grouting liquid to achieve the expected reinforcement effect.

[0034] 5. The technical scheme provided by the present application improves the impermeability of the concrete, reduces the erosion of water to the slope body, effectively improves the high strength, high toughness, and good impact resistance of the concrete, enhances the long-term stability of the slope body, and improves the service life of the project.

[0035] 6. The technical scheme provided by the present application sprays in sections and pieces in sequence to ensure that the concrete surface is smooth, moist and lustrous, without dry spots and slip streaming. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0037] Figure 2 It is a schematic diagram of the overall structure of the present application; Figure 1 It is a local structure enlarged view of area A in the present application;

[0038] Figure 3 It is a schematic diagram of the position of the mounting groove in the present application;

[0039] Figure 4 It is a schematic diagram of the position of the filter material in the present application;

[0040] Figure 5 It is an exploded view of part of the structure in the present application;

[0041] Figure 6 Method flowchart of the present application;

[0042] In the figure: 1, slope protection assembly; 2, drainage assembly; 11, anchor rod; 12, slope body; 13, reinforcing bar; 14, steel mesh; 15, horizontal cross-shaped frame; 16, vertical cross-shaped frame; 21, drainage pipe; 22, waterproof board; 23, installation groove; 24, water guide frame; 25, water guide hole; 26, filter material; 27, water guide board; 28, water guide groove; 29, water discharge frame; 30, water discharge groove; 31, redundant channel; 32, filter plate; 33, filter screen; 34, base; 35, support column. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0044] Embodiment 1

[0045] Please refer to the drawings Figure 1 - the drawings Figure 5 The slope support structure provided by the present application comprises a slope protection assembly 1, which is composed of an anchor rod 11, a slope body 12, a reinforcing bar 13, a steel mesh 14, a horizontal cross-shaped frame 15 and a vertical cross-shaped frame 16. The anchor rod 11 is symmetrically fixedly connected to the slope body 12. The reinforcing bar 13 is fixedly connected to the anchor rod 11. The steel mesh 14 is fixedly connected to the anchor rod 11 and laid on the slope body 12. The horizontal cross-shaped frame 15 is fixedly connected to the anchor rod 11 and the steel mesh 14. The vertical cross-shaped frame 16 is fixedly connected to the steel mesh 14 and the horizontal cross-shaped frame 15. The vertical cross-shaped frame 16 is fixedly connected to the anchor rod 11.

[0046] In order to facilitate drainage, the slope body 12 is fixedly connected with the drain pipe 21 in the drainage assembly 2, the drain pipe 21 is fixedly connected with the waterproof plate 22, the drainage assembly 2 is composed of the drain pipe 21, the waterproof plate 22, the mounting groove 23, the water guide frame 24, the water guide hole 25, the filter material 26, the water guide plate 27, the water guide groove 28, the water drainage frame 29, the water drainage groove 30, the redundant channel 31, the filter plate 32, the filter screen 33, the base 34 and the support column 35, the waterproof plate 22 is fixedly connected on the mounting groove 23, the mounting groove 23 is arranged on the slope body 12, the mounting groove 23 is fixedly connected with the water guide frame 24, the water guide frame 24 is fixedly connected on the waterproof plate 22, the water guide hole 25 is arranged on the water guide frame 24, the filter material 26 is fixedly connected in the water guide frame 24, the filter material 26 is fixedly connected with the water guide plate 27, the water guide groove 28 is arranged on the water guide plate 27, the water guide plate 27 is fixedly connected on the water drainage frame 29, the water drainage frame 29 is fixedly connected on the water guide frame 24, the water drainage groove 30 is arranged on the water drainage frame 29, the redundant channel 31 is fixedly connected on one end of the water drainage frame 29, the filter plate 32 is fixedly connected on the other end of the redundant channel 31, the drain pipe 21 penetrates through the waterproof plate 22, the filter screen 33 is fixedly connected on one end of the drain pipe 21, the water drainage frame 29 is fixedly connected on the base 34, the base 34 is fixedly connected on the waterproof plate 22, one end of the support column 35 is fixedly connected on the base 34, the other end of the support column 35 is fixedly connected on the water guide frame 24.

[0047] Example 2

[0048] The slope supporting structure construction process provided by the application adopts the slope supporting structure provided by the embodiment 1 Figure 6 , comprising the following steps:

[0049] Step one: earthwork excavation and repair

[0050] The slope surface to be constructed is investigated and excavated, before construction, the buried conditions of surrounding buildings and structures must be understood, the construction of the reinforcing bar is carefully checked to see whether it will damage the buildings and structures, and attention is paid to avoiding and protecting the buildings and structures, when obstacles are encountered, construction must be stopped immediately, and after the causes are found, construction can continue; the slope is excavated from top to bottom, the preset position of each layer of anchor rod 11 is an excavation layer, the excavation depth of each layer should be within 0.5 m below the anchor rod 11 of the layer, timely support, and over-excavation is strictly prohibited, when the earthwork is constructed, it should be excavated layer by layer, the thickness of each layer of earth is not more than 2 m, and the length is not more than 40 m, when the mechanical excavation is performed, a certain thickness of 20-30 cm of protective layer should be reserved, the slope surface is manually trimmed, after the upper sprayed concrete surface layer reaches 70% of the design strength, the lower layer of earthwork can be excavated and constructed;

[0051] Step two: drainage layout

[0052] The drainage facility is arranged, the water guide frame 24, the water draining frame 29 and the base 34 made of waterproof material are welded on the waterproof plate 22, the support column 35 made of steel bars is welded between the base 34 and the water guide frame 24, the filter material 26 and the water guide plate 27 are respectively placed on the water guide frame 24, the drainage pipe 21 is welded with the waterproof plate 22, the filter screen 33 is installed on one end of the drainage pipe 21, and the redundant channel 31 welded with the filter plate 32 is connected on the water draining frame 29 and the drainage pipe 21, wherein the redundant channel 31 connected on the water draining frame 29 is connected at the position close to the top of the water draining frame 29, the installation groove 23 with the size matching the waterproof plate 22 and the base 34 is dug on the repaired slope body 12, the drainage assembly 2 is placed in the installation groove 23, the drainage pipe 21 is ensured to be inclined downward at an angle of 15°, then the installation groove 23 is backfilled to ensure the stability of the drainage assembly 2, and the slope surface is repaired again.

[0053] The step is implemented by welding the water guide frame, the water draining frame and the base on the waterproof plate made of waterproof material, welding the support column made of steel bars between the base and the water guide frame, placing the filter material and the water guide plate on the water guide frame, welding the drainage pipe with the waterproof plate, installing the filter screen on one end of the drainage pipe, and connecting the redundant channel welded with the filter plate on the water draining frame and the drainage pipe, wherein the redundant channel connected on the water draining frame is connected at the position close to the top of the water draining frame, the installation groove with the size matching the waterproof plate and the base is dug on the repaired slope body, the drainage assembly is placed in the installation groove, the drainage pipe is ensured to be inclined downward at an angle of 15°, then the installation groove is backfilled to ensure the stability of the drainage assembly.

[0054] The water is prevented from eroding the slope body by the waterproof plate, the infiltrated water is transmitted to the filter material through the water guide frame and the water guide hole for primary filtration, the infiltrated water is guided to the water draining frame through the water guide plate, the water guide groove and the water draining groove, the infiltrated water is gathered in the water draining frame, and is discharged through the drainage pipe after secondary filtration through the filter screen, if the filter screen is blocked, the infiltrated water is gathered in the water draining frame to the height of the redundant channel, and the accumulated water is discharged to the drainage pipe through the redundant channel and the filter plate, and is drained through the drainage pipe, the drainage assembly can be prepared in advance, the installation groove is dug, and the drainage assembly can be quickly installed and used, good drainage function is provided, and the use stability of the equipment is improved after the filter screen is blocked, the redundant channel is used for auxiliary drainage, and the use stability of the equipment is improved.

[0055] Step three: arranging the anchoring device on the slope surface to be constructed

[0056] The slope surface after repair is reinforced by the anchor rod 11, the horizontal spacing of the anchor rod 11 is 2.0 m, the vertical spacing is 2.0 m, φ25 steel bars are adopted, the drilling diameter is 130 mm, the incident angle is 15°, cement slurry is injected in the whole hole, and the strength of the grouting body is not less than M30; the anchor rod 11 is inserted by using the direct insertion process of the inserted steel bars after laying out the inserted steel bar position, and then the reinforcing bars 13 are welded between each anchor rod 11.

[0057] The cement paste comprises the following components by mass percentage: 42.5R Portland cement 15%; coarse aggregate 25%, fine aggregate 25%, naphthalene sulfonate formaldehyde condensate 0.5%, and the balance being water.

[0058] Step four, first spraying concrete;

[0059] The first concrete spraying operation is performed as required, and the slope 12 with the installed anchor rod 11 and reinforcing bar 13 is sprayed with concrete. First, 3wt% to 5wt% of 8880 type cement accelerator is added to the concrete, and the spraying operation is performed in sections and pieces in turn. The spraying sequence in the same section should be from bottom to top. The first spraying thickness is 80mm. The operation sequence of the spraying machine is as follows: when starting, the air should be sent first, then the motor is started, and finally the material is fed; when stopping, the feeding should be stopped first, then the motor is turned off, and finally the air is stopped. When spraying, the nozzle should be perpendicular to the sprayed surface as much as possible, and the distance should be 0.6-1.2m. A circle with a diameter of 30-50cm is drawn to form a spiral shape and advance. The air pressure during spraying is controlled by the sprayer. Generally, the air pressure is adjusted to 120-180Pa, and the delivery distance is 40-60m. As the delivery distance increases, the air pressure needs to be increased appropriately. If the air pressure is too large, the rebound rate will increase. If it is too small, the material beam spraying distance will be shortened, and it will be difficult to reach the spraying surface. At the reinforcing bar position, the lower part of the reinforcing bar should be sprayed first, and then the upper part of the reinforcing bar should be sprayed. The water-cement ratio should be controlled during spraying to keep the concrete surface flat, wet and shiny, without dry spots and sliding flow phenomena. The newly sprayed concrete should be sprayed and maintained to keep the surface wet. The maintenance period should not be less than 14 days starting from 2h after the initial setting of the sprayed concrete. Because a certain amount of accelerator is added to the sprayed concrete, it can significantly accelerate the setting of the concrete and improve the early strength, and to some extent, it can inhibit the hydration of cement and easily produce larger shrinkage deformation. Therefore, a longer maintenance period must be maintained to ensure normal strength growth and reduce and prevent shrinkage cracking.

[0060] Step five, hanging the mesh surface:

[0061] The mesh surface is hung on the anchoring device. The steel mesh 14 should be firmly connected with the anchor rod 11 and other anchoring devices. The steel mesh 14 should not shake during spraying concrete. According to the design requirements, the Φ8@200×200 two-way steel mesh 14 is bound. The reinforcement is arranged in two directions, and the joints of adjacent steel bars are staggered by 300mm. After the steel mesh 14 is prepared, it is hung on the anchor rod 11, and horizontal and vertical cross-shaped frames 15 and 16 are welded on the anchor rod 11 and the steel mesh 14 to ensure that the horizontal and vertical cross-shaped frames 15 and 16 are tightly pressed on the steel mesh 14.

[0062] The anchor rod is inserted into the slope body to be constructed to fix the anchor rod, and the reinforcing rib is welded on the anchor rod to further enhance the stability of the anchor rod on the slope body, then the welded steel mesh, the horizontal cross-shaped frame and the vertical cross-shaped frame are arranged in sequence during the construction process, so that the slope body is provided with good stability effect, and the structure is simple, and the construction efficiency is improved.

[0063] Step six, secondly spraying concrete;

[0064] The second concrete spraying operation is performed according to requirements, the slope body 12 with the anchor rod 11, the reinforcing rib 13, the steel mesh 14, the horizontal cross-shaped frame 15 and the vertical cross-shaped frame 16 is added is sprayed with concrete for the second time, the second spraying thickness is 70mm, the specific spraying operation is consistent with the first spraying, and the above process is repeated until the engineering is completed.

[0065] The first and second concrete spraying operations each include the following material quality ratio: 42.5R Portland cement, fine aggregate, coarse aggregate with a particle size of less than 15mm, water, naphthalene sulfonate formaldehyde condensate, and sodium sulfate with a mass ratio of 500:800:800:200:3:5.

[0066] The concrete spraying operation should be performed in sections and pieces in sequence, the spraying sequence in the same section should be from bottom to top, the first spraying thickness is 80mm, and the second spraying thickness is 70mm, the operation sequence of the spraying machine is: when starting, air should be sent first, then the motor is started, and finally the material is fed; when stopping, the feeding should be stopped first, then the motor is turned off, and then the air is stopped, when spraying, the nozzle should be perpendicular to the sprayed surface as much as possible, the distance is preferably 0.6-1.2m, a circle with a diameter of 30-50cm is drawn to form a spiral shape, the spraying work air pressure is controlled by the spraying operator, and the air pressure is usually adjusted to 120-180Pa, and the conveying distance is 40-60m; as the conveying distance increases, the air pressure needs to be appropriately increased; if the air pressure is too large, the rebound rate will increase; if the air pressure is too small, the material beam spraying distance will be shortened, and it is difficult to reach the spraying surface, in the reinforcing rib part, the lower part of the reinforcing rib should be sprayed first, and then the upper part of the reinforcing rib is sprayed, the water-cement ratio should be controlled during spraying, the concrete surface is kept flat, wet and smooth, without dry spots and sliding flow phenomena, the newly sprayed concrete should be sprayed and maintained to keep the surface wet, the curing period is not less than 14 days starting from 2h after the initial setting of the sprayed concrete, by adding the setting accelerator in the concrete and providing a longer curing period, the setting of the concrete can be significantly accelerated, the early strength can be improved, the normal growth of the strength can be ensured to a certain extent, the shrinkage and cracking are reduced and prevented, and the method and spraying process of the twice spraying concrete further improve the stability of the slope surface, and effectively avoid the slope landslide.

[0067] The completed anti-slide pile is accepted according to the method stipulated in GB50330-2013 "Technical Specification for Building Slope Engineering", GB0086-2011 "Technical Specification for Rock Soil Anchoring and Shotcrete Supporting Engineering", GB 50086-2015 "Technical Specification for Rock Soil Anchoring and Shotcrete Supporting Engineering" and the like, and all indexes are in conformity.

[0068] The specific test data are as follows:

[0069] 1) Bonding strength test

[0070] After 28 days of childbearing age, a 100mm diameter drill hole is drilled, and three core samples are taken for the pull test between the shotcrete and the rock and between the shotcrete layers, and the bonding strength is 1.12MPa, 1.09MPa and 1.23MPa.

[0071] 2) Concrete strength

[0072] The 1-day compressive strength is 18.2MPa, the 28-day compressive strength is 49.26MPa, and the rebound rate is 6.3%.

[0073] 3) Setting time

[0074] Before construction, the setting time of the concrete is tested, the initial setting is 2min, and the final setting time is 8min.

Claims

1. A slope protection structure comprising a revetment assembly (1), characterised in that: The slope protection assembly (1) is composed of anchor rods (11), slope bodies (12), reinforcing bars (13), steel mesh (14), horizontal T-shaped frames (15) and vertical T-shaped frames (16), the anchor rods (11) are fixedly connected on the slope bodies (12) in a symmetrical manner, the reinforcing bars (13) are fixedly connected on the anchor rods (11), the steel mesh (14) is fixedly connected on the anchor rods (11), the steel mesh (14) is laid on the slope bodies (12), the horizontal T-shaped frames (15) are fixedly connected on the anchor rods (11), the horizontal T-shaped frames (15) are fixedly connected on the steel mesh (14), the vertical T-shaped frames (16) are fixedly connected on the steel mesh (14), the vertical T-shaped frames (16) are fixedly connected with the horizontal T-shaped frames (15), the vertical T-shaped frames (16) are fixedly connected on the anchor rods (11), the drainage pipes (21) in the drainage assembly (2) are fixedly connected in the slope bodies (12), the waterproof plates (22) are fixedly connected on the drainage pipes (21); The drainage assembly (2) is composed of drainage pipes (21), waterproof plates (22), mounting grooves (23), water guide frames (24), water guide holes (25), filter materials (26), water guide plates (27), water guide grooves (28), water discharge frames (29), water discharge grooves (30), redundant channels (31), filter plates (32), filter screens (33), bases (34) and support columns (35), the waterproof plates (22) are fixedly connected on the mounting grooves (23), the mounting grooves (23) are arranged on the slope bodies (12), the water guide frames (24) are fixedly connected on the mounting grooves (23), the water guide frames (24) are fixedly connected on the waterproof plates (22), the water guide holes (25) are arranged on the water guide frames (24), the filter materials (26) are fixedly connected in the water guide frames (24), the water guide plates (27) are fixedly connected with the filter materials (26), the water guide grooves (28) are arranged on the water guide plates (27), the water guide plates (27) are fixedly connected on the water discharge frames (29), the water discharge frames (29) are fixedly connected on the water guide frames (24), the water discharge grooves (30) are arranged on the water discharge frames (29), the redundant channels (31) are fixedly connected on the water discharge frames (29) in a symmetrical manner, one end of the redundant channels (31) is fixedly connected with the filter plates (32), the other end of the redundant channels (31) penetrates through the water discharge frames (29) and is fixedly connected on the drainage pipes (21), the drainage pipes (21) penetrate through the waterproof plates (22), the filter screens (33) are fixedly connected on one end of the drainage pipes (21). The water discharge frames (29) are fixedly connected on the bases (34), the bases (34) are fixedly connected on the waterproof plates (22), one end of the support columns (35) is fixedly connected on the bases (34) in a symmetrical manner, the other end of the support columns (35) is fixedly connected on the water guide frames (24).

2. A method of constructing a slope support structure as claimed in claim 1, wherein: The method comprises the following steps: Step one, investigating and excavating the slope surface to be constructed; step two, arranging drainage facilities; step three, arranging anchor devices on the slope surface to be constructed; step four, first spraying concrete; step five, hanging a mesh on the anchor devices; step six, second spraying concrete.

3. The method of constructing a slope support structure according to claim 2, wherein: Step one) to be constructed slope surface investigation and excavation construction is slope excavation from top to bottom, each layer of anchor rod (11) preset position is a excavation layer, each layer of excavation depth should be within 0.5 m of the layer of anchor rod (11) below, and support in time, each layer of soil layer thickness is not more than 2 m, the length is not more than 40 m.

4. The process for constructing a slope support structure according to claim 2, wherein: In step two, the water plate (22) made of waterproof material is welded with water guide frame (24), water drainage frame (29) and base (34), the support column (35) made of steel bar is welded between the base (34) and the water guide frame (24), the filter material (26) and the water guide plate (27) are respectively placed on the water guide frame (24), the drainage pipe (21) is welded with the water plate (22), the filter screen (33) is installed on one end of the drainage pipe (21), and the redundant channel (31) welded with the filter plate (32) is connected on the water drainage frame (29) and the drainage pipe (21), wherein the redundant channel (31) connected on the water drainage frame (29) is connected at the position close to the top of the water drainage frame (29), the installation groove (23) with the size of the water plate (22) and the base (34) is opened on the repaired slope body (12), the drainage assembly (2) is placed in the installation groove (23), the drainage pipe (21) is ensured to be inclined downward at an angle of 15°, and then the installation groove (23) is backfilled.

5. The process for constructing a slope support structure according to claim 2, wherein: In step three, the slope surface after repairing is reinforced by anchor rod (11), the horizontal spacing of anchor rod (11) is 2.0 m, and the vertical spacing is 2.0 m; the drilling diameter is 130 mm, the incident angle is 15°, and the whole hole is injected with cement slurry; the anchor rod (11) is inserted by using the direct insertion process of the inserted steel bar after laying out the line at the inserted steel bar position, and then the reinforcing rib (13) is welded between each anchor rod (11). The cement slurry comprises the following components in mass percentage: 42.5R Portland cement 15%; coarse aggregate 25%, fine aggregate 25%, naphthalene sulfonate formaldehyde condensate 0.5%, and the balance is water.

6. The process for constructing a slope support structure according to claim 2, wherein: In step four, the slope body (12) after being provided with anchor rod (11) and reinforcing rib (13) is sprayed with concrete, the spraying of concrete is sequentially performed in sections and pieces, the spraying sequence in the same section should be from bottom to top, and the first spraying thickness is 80 mm; The concrete comprises the following materials in mass ratio: 42.5R Portland cement, fine aggregate, coarse aggregate with particle size less than 15 mm, water, naphthalene sulfonate formaldehyde condensate, and sodium sulfate with a mass ratio of 500:800:800:200:3:

5.

7. The process for constructing a slope support structure according to claim 2, wherein: Step five) hanging the net surface on the anchoring device, specifically: the steel bar net (14) should be connected firmly with the anchor rod (11) and other anchoring devices, the bidirectional steel bar net (14) is bound, the reinforcement is arranged bidirectionally, the adjacent steel bar joints are staggered by 300 mm, the steel bar net (14) is hung on the anchor rod (11) after being arranged, and the horizontal and vertical well frames (15) and (16) are electrically welded on the anchor rod (11) and the steel bar net (14), so that the horizontal and vertical well frames (15) and (16) are tightly pressed on the steel bar net (14).

8. The process for constructing a slope support structure according to claim 2, wherein: In step six, the slope (12) after the installation of anchor rod (11), reinforcing bar (13), steel mesh (14), transverse cross (15) and vertical cross (16) is sprayed with second time, the second time spraying thickness is 70mm, the specific spraying operation is consistent with the first time spraying, after completion, repeat the process of step one) - step six) to the end of the project.

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