Slope anti-slide pile and construction technology thereof

Abstract

The slope slide-resistant pile comprises a slope protection assembly, the slope protection assembly is composed of anchor rods, a slope body, reinforcing ribs, a reinforcing mesh, a transverse #-shaped frame and a vertical #-shaped frame, and the anchor rods are symmetrically and fixedly connected to the slope body; according to the slope protection device, a good stabilizing effect is provided for a slope body through the slope protection assembly, the structure is simple, and the construction efficiency is improved; the drainage assembly is prepared in advance, the installation groove is dug, rapid installation and use can be achieved, a good drainage function is provided, auxiliary drainage can be conducted through a redundant channel after the filter screen is blocked, and the use stability of the equipment is improved; by adding the accelerator into the concrete and curing for a specified long time, the concrete setting can be obviously accelerated, the early strength can be improved, the normal increase of the strength can be ensured to a certain extent, the shrinkage cracking can be reduced and prevented, and meanwhile, the stability of the slope surface is further improved by a method and a spraying process of spraying the concrete twice, so that the slope surface quality is improved. And slope landslide is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of slope protection construction, in particular to slope anti-slide piles and a construction process thereof. Background Art

[0002] Slope protection refers to the protective measures taken on the slopes of roads, railways, bridges, hydraulic structures, etc. to prevent rainwater and groundwater from eroding the slopes, maintaining slope stability and preventing slope scour. It is an important measure to protect the stability and safety of the slopes. By choosing appropriate slope protection methods and scientific construction methods, it can effectively prevent the occurrence of problems such as water scour and slope instability, and ensure the safety and stability of infrastructure.

[0003] However, the existing slope protection construction still has shortcomings. First, in order to provide a good stabilization effect for the slope, the construction efficiency of the existing slope protection construction is mostly slow; second, in the existing slope protection construction, the drainage facilities with good drainage function are mostly not convenient to arrange and use, and it is difficult to continue to drain after being blocked, which affects the stability of the equipment; third, in the existing slope protection construction, the concrete coagulation is usually slow and thus the early strength cannot be improved, and rapid coagulation will produce shrinkage cracking, and there is a lack of spraying concrete methods and spraying processes to further improve the stability of the slope surface, and it is impossible to effectively avoid slope landslides; therefore, it is necessary to design slope anti-slide piles and their construction processes. Summary of the invention

[0004] The purpose of the present invention is to provide a slope anti-slide pile and a construction process thereof to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides a first technical solution:

[0006] A slope anti-slide pile comprises a slope protection component, which consists of anchor rods, a slope body, reinforcing ribs, 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 anchor rods are fixedly connected with reinforcing ribs, the anchor rods are fixedly connected with the steel mesh, the steel mesh is laid on the slope body, the anchor rods are fixedly connected with the horizontal cross-shaped frame, the horizontal cross-shaped frame is fixedly connected to the steel mesh, the steel mesh is fixedly connected with the vertical cross-shaped frame, the vertical cross-shaped frame is fixedly connected with the horizontal cross-shaped frame, the vertical cross-shaped frame is fixedly connected to the anchor rods, a drainage pipe in a drainage component is fixedly connected in the slope body, and a water-blocking board is fixedly connected to the drainage pipe.

[0007] As a further technical solution of the present invention, the drainage assembly is composed of a drainage pipe, a water baffle, an installation groove, a water guide frame, a water guide hole, a filter material, a water diversion plate, a water diversion groove, a drain frame, a drain groove, a redundant channel, a filter plate, a filter screen, a base and a support column. The water baffle is fixedly connected to the installation groove, the installation groove is opened on the slope, the installation groove is fixedly connected to the water guide frame, the water guide frame is fixedly connected to the water baffle, the water guide frame is provided with water guide holes, the water guide frame is fixedly connected with the filter material, the filter material is fixedly connected to the water diversion plate, the water diversion groove is opened on the water diversion plate, the water diversion plate is fixedly connected to the drain frame, the drain frame is fixedly connected to the water guide frame, the drain frame is provided with a drain groove, the drain frame is symmetrically fixedly connected with redundant channels, one end of the redundant channel is fixedly connected with a filter plate, the other end of the redundant channel passes through the drain frame and is fixedly connected to the drainage pipe, the drainage pipe passes through the water baffle, and one end of the drainage pipe is fixedly connected with a filter screen.

[0008] As a further technical solution of the present invention, the drain frame is fixedly connected to the base, the base is fixedly connected to the water-blocking plate, one end of the support column is symmetrically fixedly connected to the base, and the other end of the support column is fixedly connected to the water guide frame.

[0009] The second technical solution provided by the present invention is:

[0010] A slope anti-slide pile construction process comprises the following steps:

[0011] Step 1: Investigate and excavate the slope to be constructed;

[0012] Step 2: Arrange drainage facilities;

[0013] Step 3: Arrange anchoring devices on the slope to be constructed;

[0014] Step 4: First shotcrete spraying;

[0015] Step 5, hanging the mesh on the anchoring device;

[0016] Step 6: Second shotcrete spraying;

[0017] Among them, step 2), step 3) and step 5) use the slope anti-slide piles described in the first technical solution.

[0018] As a further technical solution of the present invention, in step 1), the slope to be constructed is inspected and excavated, and the slope excavation is carried out from top to bottom. The preset position of each layer of anchor rods (11) is an excavation layer. The excavation depth of each layer should be within 0.5m below the anchor rod of that layer, and timely support is provided. The thickness of each soil layer is not more than 2m and the length is not more than 40m.

[0019] Before construction, we must first understand the buried conditions of surrounding buildings, carefully check whether the reinforcement construction will cause damage to the buildings, and pay attention to avoidance and protection. When encountering obstacles, we must stop construction immediately and continue construction after finding out the reasons. When mechanical excavation, a certain thickness of protective layer must be reserved, and the slope surface must be manually trimmed. Only after the upper sprayed concrete surface layer reaches 70% of the design strength can the lower earthwork construction be excavated.

[0020] As a further technical solution of the present invention, in the step two, a water guide frame, a drain frame and a base are welded on a water baffle made of waterproof material, a support column made of steel bars is welded between the base and the water guide frame, filter materials and water guide plates are placed on the water guide frame respectively, the drain pipe is welded to the water baffle, a filter screen is installed on one end of the drain pipe, and a redundant channel welded with a filter plate is connected to the drain frame and the drain pipe, wherein the redundant channel connected to the drain frame has an interface located near the top of the drain frame, and an installation groove that matches the size of the water baffle and the base is excavated on the repaired slope, and after the drainage assembly is placed therein, the drain pipe is ensured to be tilted downward at an angle of 15°, and then the installation groove is backfilled to ensure the stability of the drainage assembly, and the slope is repaired again.

[0021] As a further technical solution of the present invention, in the step three, the slope surface after slope repair is reinforced with anchor rods, the horizontal spacing of the anchor rods is 2.0m, the vertical spacing of the anchor rods is 2.0m, φ25 steel bars are used, the drilling diameter is 130mm, the incident angle is 15°, and cement slurry is injected into the entire hole. The strength of the grouting body is not less than M30; the lines are laid out at the reinforcement position, and the anchor rods are inserted by the direct insertion process, and then reinforcing bars are welded between each anchor rod.

[0022] The cement slurry comprises the following components in mass percentage: 15% of 42.5R silicate cement; 25% of coarse aggregate, 25% of fine aggregate, 0.5% of naphthalenesulfonate formaldehyde condensate, and the balance is water.

[0023] As a further technical solution of the present invention, in step 4, the slope after the installation of anchor rods and reinforcement bars is sprayed with concrete. The spraying operation should be carried out in sections and pieces in sequence. 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 a mass ratio: 42.5R silicate cement, fine aggregate, coarse aggregate with a particle size less than 15 mm, water, naphthalenesulfonate formaldehyde condensate, and sodium sulfate in a mass ratio of 500:800:800:200:3:5.

[0025] The operating sequence of the spray machine is: when starting the machine, air should be supplied first, then the motor should be started, and finally the material should be added; when stopping the machine, the material addition should be stopped first, then the motor should be turned off, and then the air should be stopped. When spraying, the nozzle should be as vertical as possible to the sprayed surface, and the distance should be 0.6-1.2m. It should move forward in a spiral shape with a diameter of 30-50cm. The control of the spraying working air pressure is directed by the sprayer, 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 increased appropriately; if the air pressure is too high, the rebound rate will increase; if it is too small, the spraying distance of the material beam will become shorter and it will be difficult to reach the spraying surface; in the rebar area, the bottom of the rebar should be sprayed first, and then the top of the rebar should be sprayed. The water-cement ratio should be controlled during spraying to keep the concrete surface flat, moist and shiny, without dry spots and slippage.

[0026] Newly sprayed concrete should be sprayed with water to keep its surface moist. The curing period should be no less than 14 days, starting from 2 hours after the initial setting of the sprayed concrete. Since a certain amount of accelerators and water reducers are added to the sprayed concrete, which can significantly accelerate the setting of the concrete and improve the early strength, it also inhibits the hydration of cement to a certain extent, making it easy to produce larger shrinkage deformation. Therefore, a longer curing period must be maintained to ensure the normal growth of strength and reduce and prevent shrinkage cracking.

[0027] As a further technical solution of the present invention, in the step five, the steel mesh should be firmly connected to the anchor rod and other anchoring devices, the steel mesh should not shake during concrete spraying, the Φ8@200×200 bidirectional steel mesh is tied according to the design requirements, the reinforcement adopts bidirectional arrangement, the adjacent steel bar joints are staggered by 300mm, and the steel mesh is hung on the anchor rod after it is woven, and the horizontal and vertical lattice frames are welded between the anchor rod and the steel mesh to ensure that the horizontal and vertical lattice frames are pressed tightly against the steel mesh.

[0028] As a further technical solution of the present invention, in step six, the slope after the installation of anchor rods, reinforcing bars, steel mesh, horizontal crisscross frames and vertical crisscross frames is sprayed with concrete for the second time. The thickness of the second spraying is 70 mm. The specific spraying operation is the same as the first spraying. After completion, the above process is repeated until the project is completed.

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

[0030] 1. The technical solution provided by the present invention is to insert anchor rods into the slope to be constructed for fixing, weld reinforcing ribs on the anchor rods, and then sequentially arrange welded steel mesh, horizontal cross-shaped frames and vertical cross-shaped frames, so that the slope is well stabilized; the structure is simple, the operation is convenient, and the construction efficiency is effectively improved.

[0031] 2. The technical solution provided by the present invention significantly improves the stability of the slope through the fixation of anchor rods and reinforcing bars and the arrangement of steel mesh, reduces the probability of accidents such as slope landslides, and is suitable for various types of slopes, such as earth slopes, rock slopes, etc., and has broad application prospects.

[0032] 3. The drainage system provided by the technical solution of the present invention prevents water from eroding the slope through the water-blocking plate, thereby extending the service life of the slope. The water guide frame and the water guide hole transfer the seepage water to the filter material for primary filtration, ensuring that the seepage water is effectively treated; the water guide plate guides the seepage water through the water guide groove and the water drain groove to the water drain frame to achieve secondary filtration, and discharges it through the drain pipe. When the filter screen is blocked, auxiliary drainage can be carried out through the redundant channel to ensure long-term stable operation. Through such a drainage system, not only the stability of the slope is improved, but also the maintenance cost and construction delay caused by water damage are reduced, providing a strong guarantee for the long-term safety of the project.

[0033] 4. The slurry of the technical solution provided by the present invention is composed of 42.5R silicate cement, coarse aggregate, fine aggregate, and naphthalenesulfonate formaldehyde condensate. It has good fluidity and can fully penetrate into the tiny cracks of the slope. It has high compressive strength, flexural strength, and impermeability, ensuring the strength and stability of the grouting liquid to achieve the expected reinforcement effect.

[0034] 5. The technical solution of the shotcrete provided by the present invention includes 42.5R silicate cement, fine aggregate, coarse aggregate, naphthalenesulfonate formaldehyde condensate, and sodium sulfate, which improves the anti-seepage performance of concrete and reduces the erosion of water on the slope; it can effectively improve the high strength, high toughness and good impact resistance of concrete, enhance the long-term stability of the slope, and improve the service life of the project.

[0035] 6. The technical solution provided by the present invention ensures that the concrete surface is smooth, moist and shiny, without dry spots and slippage and flow, by spraying in sections and pieces in sequence. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0037] Figure 2 for Figure 1 A magnified view of the local structure of area A in the middle;

[0038] Figure 3 It is a schematic diagram of the position of the installation slot in the present invention;

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

[0040] Figure 5 It is an exploded view of some structures in the present invention;

[0041] Figure 6 is a flow chart of the method of the present invention;

[0042] In the figure: 1. Slope protection assembly; 2. Drainage assembly; 11. Anchor rod; 12. Slope; 13. Reinforcement ribs; 14. Steel mesh; 15. Horizontal crisscross frame; 16. Vertical crisscross frame; 21. Drain pipe; 22. Water-blocking board; 23. Mounting groove; 24. Water guide frame; 25. Water guide hole; 26. Filter material; 27. Water diversion plate; 28. Water diversion trough; 29. ​​Drain frame; 30. Drain trough; 31. Redundant channel; 32. Filter plate; 33. Filter screen; 34. Base; 35. Support column. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] Please see attached Figure 1 -Attached Figure 5 The present invention provides a slope anti-sliding pile, comprising a slope protection component 1, which consists of an anchor rod 11, a slope body 12, a reinforcing rib 13, a steel mesh 14, a horizontal cross frame 15 and a vertical cross frame 16. The anchor rod 11 is symmetrically fixedly connected to the slope body 12, the reinforcing rib 13 is fixedly connected to the anchor rod 11, the steel mesh 14 is fixedly connected to the anchor rod 11, the steel mesh 14 is laid on the slope body 12, the anchor rod 11 is fixedly connected to the horizontal cross frame 15, the horizontal cross frame 15 is fixedly connected to the steel mesh 14, the steel mesh 14 is fixedly connected to the vertical cross frame 16, the vertical cross frame 16 is fixedly connected to the horizontal cross frame 15, and the vertical cross frame 16 is fixedly connected to the anchor rod 11.

[0046] In order to facilitate drainage, a drainage pipe 21 in the drainage component 2 is fixedly connected in the slope 12, and a water baffle 22 is fixedly connected to the drainage pipe 21. The drainage component 2 consists of a drainage pipe 21, a water baffle 22, a mounting groove 23, a water guide frame 24, a water guide hole 25, a filter material 26, a water guide plate 27, a water guide groove 28, a drain frame 29, a drain groove 30, a redundant channel 31, a filter plate 32, a filter screen 33, a base 34 and a support column 35. The water baffle 22 is fixedly connected to the mounting groove 23, and the mounting groove 23 is opened on the slope 12. The mounting groove 23 is fixedly connected with a water guide frame 24, and the water guide frame 24 is fixedly connected to the water baffle 22. The water guide frame 24 is provided with a water guide hole 25, and the filter material 26 is fixedly connected to the water guide frame 24. The filter material 26 is fixedly connected There is a water diversion plate 27, on which a water diversion groove 28 is provided. The water diversion plate 27 is fixedly connected to a drain frame 29, which is fixedly connected to a water guide frame 24. A drain groove 30 is provided on the drain frame 29. A redundant channel 31 is symmetrically fixedly connected to the drain frame 29. A filter plate 32 is fixedly connected to one end of the redundant channel 31. The other end of the redundant channel 31 passes through the drain frame 29 and is fixedly connected to a drain pipe 21. The drain pipe 21 passes through the baffle plate 22. A filter screen 33 is fixedly connected to one end of the drain pipe 21. The drain frame 29 is fixedly connected to a base 34, which is fixedly connected to the baffle plate 22. One end of a support column 35 is symmetrically fixedly connected to the base 34, and the other end of the support column 35 is fixedly connected to the water guide frame 24.

[0047] Example 2

[0048] The present invention provides a slope anti-slide pile construction process, using the method provided in Example 1, see the attached Figure 6 , including the following steps:

[0049] Step 1: Excavation and repair

[0050] When inspecting and excavating the construction slope, the buried conditions of the surrounding buildings (structures) must be understood before construction. Carefully check whether the reinforcement construction will cause damage to the buildings (structures), and pay attention to avoiding and protecting them. When encountering obstacles, construction must be stopped immediately, and construction can only be continued after the cause is found out; the slope excavation is carried out from top to bottom, and the preset position of each layer of anchor rods 11 is an excavation layer. The excavation depth of each layer should be within 0.5m below the anchor rods 11 of this layer. Timely support is required, and over-excavation is strictly prohibited. During earthwork construction, excavation should be carried out in layers, and the thickness of each layer of soil should not exceed 2m and the length should not exceed 40m. During mechanical excavation, a protective layer of a certain thickness of 20 to 30cm should be reserved, and the slope surface should be manually trimmed. After the upper layer of sprayed concrete surface reaches 70% of the design strength, the lower layer of earthwork construction can be excavated;

[0051] Step 2: Drainage layout

[0052] Arrange drainage facilities, weld a water guide frame 24, a drain frame 29 and a base 34 on the baffle 22 made of waterproof material, weld a support column 35 made of steel bars between the base 34 and the water guide frame 24, place filter materials 26 and water guide plates 27 on the water guide frame 24, weld the drain pipe 21 to the baffle 22, install a filter screen 33 on one end of the drain pipe 21, and connect the redundant channel 31 welded with the filter plate 32 to the drain frame 29 and the drain pipe 21, wherein the redundant channel 31 connected to the drain frame 29 has an interface located near the top of the drain frame 29, and excavate an installation groove 23 that matches the size of the baffle 22 and the base 34 on the repaired slope 12, place the drainage component 2 therein, and ensure that the drain pipe 21 is tilted downward at an angle of 15°, then backfill the installation groove 23 to ensure the stability of the drainage component 2, and repair the slope again.

[0053] This step involves welding a water guide frame, a drain frame and a base on a water baffle made of waterproof material, welding a support column made of steel bars between the base and the water guide frame, placing filter materials and water guide plates on the water guide frame, welding the drain pipe to the water baffle, installing a filter screen on one end of the drain pipe, and connecting the redundant channel welded with the filter plate to the drain frame and the drain pipe, wherein the interface of the redundant channel connected to the drain frame is located near the top of the drain frame, and an installation groove that fits the size of the water baffle and the base is excavated on the repaired slope. After placing the drainage component in it, ensure that the drain pipe is tilted downward at an angle of 15°, and then backfill the installation groove to ensure the stability of the drainage component.

[0054] Water-blocking plates are used to prevent water from eroding the slope, and seepage water is transferred to the filter material through water guide frames and water guide holes for primary filtration. The seepage water is then guided to the drain frame through water guide grooves and drain grooves by water guide plates. The seepage water gathers in the drain frame, and is discharged through a drain pipe after secondary filtration through a filter. If the filter is clogged, the seepage water gathers in the drain frame to the height of the redundant channel, and the accumulated water is discharged to the drain pipe through the redundant channel and the filter plate. The drainage is carried out through the drain pipe. The drainage components can be prepared in advance, and can be quickly installed and used after the installation groove is dug out. This provides good drainage function, and can perform auxiliary drainage through the redundant channel when the filter is clogged, thereby improving the stability of equipment use.

[0055] Step 3: Install anchoring devices on the construction slope

[0056] The slope surface after slope repair is reinforced with anchor rods 11. The horizontal spacing of anchor rods 11 is 2.0m, the vertical spacing is 2.0m, φ25 steel bars are used, the drilling diameter is 130mm, 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 lines are laid out at the reinforcement position, and the anchor rods 11 are inserted by the reinforcement direct driving process, and then the reinforcement 13 is welded between each anchor rod 11.

[0057] The cement slurry comprises the following components in percentage by mass: 15% of 42.5R silicate cement; 25% of coarse aggregate, 25% of fine aggregate, 0.5% of naphthalenesulfonate formaldehyde condensate, and the balance is water.

[0058] Step 4: First shotcrete spraying;

[0059] The first concrete spraying operation is carried out as required. The slope 12 after the anchor rod 11 and the reinforcement 13 are sprayed with concrete. First, 3wt% to 5wt% of 8880 cement accelerator is added to the concrete. The spraying operation should be carried out in sections and pieces. The spraying sequence in the same section should be from bottom to top. The first spraying thickness is 80mm. The operation sequence of the sprayer is: when starting the machine, the air should be supplied first, then the motor should be started, and finally the material should be added; when stopping the machine, the material should be stopped first, then the motor should be turned off, and then the air should be stopped. When spraying, the nozzle should be as vertical as possible to the sprayed surface, and the distance should be 0.6-1.2m. The nozzle should be drawn into a spiral shape with a diameter of 30-50cm. The control of the spraying working air pressure is directed by the sprayer. The air pressure is usually adjusted to 120-180Pa, and the conveying distance is 40-60m. With the increase of conveying distance, the wind pressure needs to be increased appropriately; if the air pressure is too high, the rebound rate will increase; if it is too low, the injection distance of the material bundle will become shorter and it will be difficult to reach the injection surface. At the inserted reinforcement part, the bottom of the inserted reinforcement should be sprayed first, and then the top of the inserted reinforcement should be sprayed. The water-cement ratio should be controlled during spraying to keep the concrete surface flat, moist and shiny, without dry spots and slippage. The newly sprayed concrete should be sprayed with water to keep its surface moist. Starting from 2 hours after the initial setting of the sprayed concrete, the curing period should be no less than 14 days; since a certain amount of accelerator is added to the sprayed concrete, it can not only significantly accelerate the setting of the concrete and improve the early strength, but also inhibit the hydration of cement to a certain extent, which is easy to produce large shrinkage deformation; therefore, a longer curing period must be maintained to ensure the normal growth of strength and reduce and prevent shrinkage cracking.

[0060] Step 5: Set up the mesh:

[0061] A mesh is hung on the anchoring device. The steel mesh 14 should be firmly connected to the anchor rod 11 and other anchoring devices. The steel mesh 14 should not shake during concrete spraying. The Φ8@200×200 bidirectional steel mesh 14 is tied according to the design requirements. The reinforcement is arranged in a bidirectional manner. The adjacent steel bar joints are staggered by 300mm. After the steel mesh 14 is woven, it is hung on the anchor rod 11, and horizontal lattice frames 15 and vertical lattice frames 16 are welded on the anchor rod 11 and the steel mesh 14 to ensure that the horizontal lattice frames 15 and vertical lattice frames 16 are pressed tightly against the steel mesh 14.

[0062] Anchor rods are inserted into the slope to be constructed for fixing, and reinforcing ribs are welded on the anchor rods to further strengthen the stability of the anchor rods on the slope. Subsequently, welded steel mesh, horizontal cross-frames and vertical cross-frames are arranged in sequence during the construction process, which provides a good stabilization effect for the slope. The structure is relatively simple, which improves construction efficiency.

[0063] Step 6: Second shotcrete spraying;

[0064] The second concrete spraying operation is carried out as required. The slope 12 after the installation of anchor rods 11, reinforcing bars 13, steel mesh 14, horizontal cross-shaped frames 15 and vertical cross-shaped frames 16 is sprayed with concrete for the second time. The thickness of the second spraying is 70mm. The specific spraying operation is the same as the first spraying. After completion, the above process is repeated until the project is completed.

[0065] The first and second shotcrete sprayings both include materials in the following mass ratios: 42.5R Portland cement, fine aggregate, coarse aggregate with a particle size of less than 15 mm, water, naphthalenesulfonate formaldehyde condensate, and sodium sulfate in a mass ratio of 500:800:800:200:3:5.

[0066] The spraying operation should be carried out in sections and pieces in sequence. The spraying sequence in the same section should be from bottom to top. The thickness of the first spraying is 80mm, and the thickness of the second spraying is 70mm. The operating sequence of the sprayer is: when starting the machine, the air should be supplied first, then the motor should be started, and finally the material should be added; when stopping the machine, the material should be stopped first, then the motor should be turned off, and then the air should be stopped. When spraying, the nozzle should be as vertical as possible to the sprayed surface, and the distance should be 0.6-1.2m. It should move forward in a spiral shape with a diameter of 30-50cm. The control of the spraying working air pressure is directed by the sprayer. 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 increased appropriately; if the air pressure is too high, the rebound rate will increase; if it is too small, then The spraying distance of the material beam will become shorter and it will be difficult to reach the spraying surface. At the rebar insertion site, the bottom of the rebar should be sprayed first, and then the top of the rebar should be sprayed. The water-cement ratio should be controlled during spraying to keep the concrete surface flat, moist and shiny, without dry spots and slippage. The newly sprayed concrete should be sprayed with water to keep its surface moist. Starting from 2 hours after the initial setting of the sprayed concrete, the curing period should be no less than 14 days. By adding accelerators to the concrete and stipulating a longer period of curing, the coagulation of concrete can be significantly accelerated to improve the early strength, and the normal growth of strength can be guaranteed to a certain extent, reducing and preventing shrinkage cracking. At the same time, the method and spraying process of spraying concrete twice further improve the stability of the slope and effectively avoid slope landslides.

[0067] The completed anti-slide piles were inspected and accepted using the methods specified in GB50330-2013 "Technical Code for Construction Slope Engineering", GB0086-2011 "Technical Code for Rock and Soil Anchoring and Sprayed Concrete Support Engineering", GB 50086-2015 "Technical Code for Rock and Soil Anchor and Sprayed Concrete Support Engineering", and all indicators were met.

[0068] The specific test data are as follows:

[0069] 1) Adhesion test

[0070] After 28 days of growth, a hole with a diameter of 100 mm was drilled and three core samples were taken out for pull-out tests between the shotcrete and the rock and between the shotcrete layers. The bond strengths were 1.12 MPa, 1.09 MPa, and 1.23 MPa.

[0071] 2) Concrete strength

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

[0073] 3) Setting time

[0074] Before construction, the concrete setting time was tested, with initial setting time of 2 minutes and final setting time of 8 minutes.

Claims

1. A slope anti-slide pile, comprising a slope protection component (1), characterized in that: The slope protection assembly (1) is composed of anchor rods (11), a slope body (12), reinforcing ribs (13), a steel mesh (14), a transverse crisscross frame (15) and a vertical crisscross frame (16); the anchor rods (11) are symmetrically fixedly connected to the slope body (12); the reinforcing ribs (13) are fixedly connected to the anchor rods (11); the steel mesh (14) is fixedly connected to the anchor rods (11); the steel mesh (14) is laid on the slope body (12); the anchor rods (11) are fixedly connected to the reinforcing ribs (13); A transverse crisscross frame (15) is provided, the transverse crisscross frame (15) is fixedly connected to a steel mesh (14), a vertical crisscross frame (16) is fixedly connected to the steel mesh (14), the vertical crisscross frame (16) is fixedly connected to the transverse crisscross frame (15), the vertical crisscross frame (16) is fixedly connected to an anchor rod (11), a drainage pipe (21) in a drainage assembly (2) is fixedly connected in the slope body (12), and a water blocking board (22) is fixedly connected to the drainage pipe (21).

2. The slope anti-slide pile according to claim 1, characterized in that: The drainage assembly (2) is composed of a drainage pipe (21), a water baffle (22), a mounting groove (23), a water guide frame (24), a water guide hole (25), a filter material (26), a water guide plate (27), a water guide groove (28), a drain frame (29), a drain groove (30), a redundant channel (31), a filter plate (32), a filter screen (33), a base (34) and a support column (35), wherein the water baffle (22) is fixedly connected to the mounting groove (23), the mounting groove (23) is provided on the slope (12), the mounting groove (23) is fixedly connected to the water guide frame (24), the water guide frame (24) is fixedly connected to the water baffle (22), the water guide hole (25) is provided on the water guide frame (24), and the water guide frame (24) is provided with a water guide hole (25). ) is fixedly connected with a filter material (26), the filter material (26) is fixedly connected with a water guide plate (27), a water guide groove (28) is provided on the water guide plate (27), the water guide plate (27) is fixedly connected to a drain frame (29), the drain frame (29) is fixedly connected to a water guide frame (24), a drain groove (30) is provided on the drain frame (29), a redundant channel (31) is symmetrically fixedly connected to the drain frame (29), a filter plate (32) is fixedly connected to one end of the redundant channel (31), the other end of the redundant channel (31) passes through the drain frame (29) and is fixedly connected to a drain pipe (21), the drain pipe (21) passes through the water baffle (22), and a filter screen (33) is fixedly connected to one end of the drain pipe (21).

3. The slope anti-slide pile according to claim 2, characterized in that: The drain frame (29) is fixedly connected to a base (34), the base (34) is fixedly connected to a water-blocking plate (22), one end of a support column (35) is symmetrically fixedly connected to the base (34), and the other end of the support column (35) is fixedly connected to the water guide frame (24).

4. A slope anti-slide pile construction process, comprising the following steps: Step 1, inspect and excavate the slope to be constructed; step 2, arrange drainage facilities; step 3, install anchoring devices on the slope to be constructed; step 4, spray concrete for the first time; step 5, hang a mesh on the anchoring device; step 6, spray concrete for the second time; it is characterized in that: step 2), step 3), step 5) use the slope anti-slip piles described in claim 1.

5. The slope anti-slide pile construction process according to claim 4 is characterized by: Step 1) Inspecting and excavating the slope to be constructed: the slope excavation is carried out from top to bottom. The preset position of each layer of anchor rods (11) is an excavation layer. The excavation depth of each layer should be within 0.5m below the anchor rods (11) of this layer, and timely support should be provided. The thickness of each soil layer should not exceed 2m and the length should not exceed 40m.

6. The slope anti-slide pile construction process according to claim 4 is characterized by: In the second step, a water guide frame (24), a water drain frame (29) and a base (34) are welded on a water baffle (22) made of a waterproof material, a support column (35) made of steel bars is welded between the base (34) and the water guide frame (24), a filter material (26) and a water guide plate (27) are respectively placed on the water guide frame (24), the drainage pipe (21) and the water baffle (22) are welded together, a filter screen (33) is installed on one end of the drainage pipe (21), and the filter plate (32) is welded to the drainage pipe (21). ) is connected to the drain frame (29) and the drain pipe (21), wherein the redundant channel (31) connected to the drain frame (29) has an interface located near the top of the drain frame (29), and an installation groove (23) that matches the size of the baffle (22) and the base (34) is excavated on the repaired slope (12), and after the drainage component (2) is placed therein, it is ensured that the drain pipe (21) is tilted downward at an angle of 15°, and then the installation groove (23) is backfilled.

7. The slope anti-slide pile construction process according to claim 4 is characterized by: In the step 3, the slope surface after slope repair is reinforced with anchor rods (11), the horizontal spacing of the anchor rods (11) is 2.0m, and the vertical spacing is 2.0m; the drilling hole adopts a drilling diameter of 130mm, the incident angle is 15°, and cement slurry is injected into the whole hole; the line is laid out at the reinforcement insertion position, and the anchor rods (11) are inserted by the reinforcement insertion direct driving process, and then the reinforcing ribs (13) are welded between each anchor rod (11); The cement slurry comprises the following components in mass percentage: 15% of 42.5R silicate cement; 25% of coarse aggregate, 25% of fine aggregate, 0.5% of naphthalenesulfonate formaldehyde condensate, and the balance is water.

8. The slope anti-slide pile construction process according to claim 4 is characterized by: In the step 4, the slope (12) after the anchor rods (11) and the reinforcing ribs (13) are sprayed with concrete. The spraying of concrete should be carried out in sections and slices. The spraying sequence in the same section should be from bottom to top. The thickness of the first spraying is 80 mm. The concrete comprises the following materials in a mass ratio: 42.5R silicate cement, fine aggregate, coarse aggregate with a particle size less than 15 mm, water, naphthalenesulfonate formaldehyde condensate, and sodium sulfate in a mass ratio of 500:800:800:200:3:

5.

9. The slope anti-slide pile construction process according to claim 4, characterized in that: Step 5) Hanging the mesh on the anchoring device is specifically as follows: the steel mesh (14) should be firmly connected to the anchor rod (11) and other anchoring devices, the bidirectional steel mesh (14) is tied, the reinforcement is arranged in a bidirectional manner, and the adjacent steel bar joints are staggered by 300 mm. After the steel mesh (14) is completed, it is hung on the anchor rod (11), and a horizontal cross frame (15) and a vertical cross frame (16) are welded on the anchor rod (11) and the steel mesh (14) to ensure that the horizontal cross frame (15) and the vertical cross frame (16) are pressed tightly against the steel mesh (14).

10. The slope anti-slide pile construction process according to claim 4, characterized in that: In step 6, the slope (12) after the anchor rods (11), reinforcing bars (13), steel mesh (14), horizontal crisscross frames (15) and vertical crisscross frames (16) are installed is sprayed with concrete for the second time. The thickness of the second spraying is 70 mm. The specific spraying operation is the same as the first spraying. After completion, the above process is repeated until the project is completed.

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