Construction method of high and steep slope

Abstract

The invention relates to the field of side slopes, in particular to a construction method of a high and steep side slope, which comprises the following steps of: excavating the high and steep side slope, performing drilling operation along with the excavation of the side slope by using a drilling machine every time when the excavation is performed by a set depth, not erecting a bracket, burying a drainage pipe in a drilled hole, and sealing an outlet of the drainage pipe by using a plug, and repeating the steps to finish the side slope excavation of the cycle; anchor rods are constructed on the side slope, and steel bars are bound; a trackless slip form is used for concrete construction of a side slope, anchoring points are arranged on a riding track at the top of the circulating side slope, a side form and a slip form trolley are arranged, the slip form trolley and the anchoring points are connected through a traction rope, and the slip form trolley slides from bottom to top along the side form through the traction rope and conducts concrete; and after the concrete is initially set, the plug of the drainage pipe is removed, and the slope protection plate is formed. The method is simple in step, convenient to operate and good in effect.

Description

Technical Field

[0001] The present invention relates to the technical field of slopes, and particularly to a construction method for high-steep slopes. Background Art

[0002] In the slope construction of the prior art, the slope is not steep, and usually, the slope excavation is first completed, the concrete slope protection board is cast in situ by using a formwork, and then the drainage pipes are installed by drilling drainage holes on the slope; at the same time, due to the small slope and low slope height, a bracket can be used to lift the drilling machine for drilling operations at high places on the slope.

[0003] However, in alpine canyon areas, the terrain is narrow, the slope of the cast-in-situ concrete slope protection board is steep and the height difference is large, it is difficult to set up the casting formwork, and the casting construction is difficult. Drilling according to the existing method requires a high bracket height, and the stability, timeliness and economy are poor. In addition, the soil residue after drilling needs to be cleaned up. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction method for high-steep slopes in view of the problems existing in the prior art that for the cast-in-situ concrete slope protection board of high-steep slopes, due to the steep slope and large height difference, it is difficult to set up the casting formwork, the casting construction is difficult, drilling according to the existing method requires a high bracket height for lifting the drilling machine, the stability, timeliness and economy are poor, and the soil residue after drilling needs to be cleaned up.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows: A construction method for high-steep slopes, comprising the following steps: S1. Excavate the high-steep slope. For every set depth of excavation, use a drilling machine to perform drilling operations along with the slope excavation. There is no need to set up a bracket. During drilling, bury drainage pipes, and seal the outlets of the drainage pipes with plugs. Repeat this process to complete the excavation of the slope in this cycle; S2. Construct anchor bolts on the slope and bind steel bars; S3. Use a trackless slip form to perform concrete construction on the slope. Set anchor points on the berm at the top of the slope in this cycle, set side forms and a slip form trolley. Connect the slip form trolley and the anchor points through a traction rope. The slip form trolley slides up along the side form through the traction rope and constructs the concrete; S4. After the concrete initial sets, remove the plugs of the drainage pipes to form a slope protection board.

[0006] Adopt the construction method of a high-steep slope described in the present utility model. The slope is excavated and drilled simultaneously, avoiding the drilling operation of the drilling machine under large height differences, eliminating the need to set up scaffolds to raise the drilling machine, improving the stability, timeliness, and economy of drilling. The soil residues generated by drilling are immediately cleared following the excavation of the slope and do not require separate cleaning. The trackless slip form is used for the construction of the high-steep slope. Only the side form needs to be installed. The slip form trolley uses the top of the side form or the adjacent concrete slab surface that has been poured and formed as the supporting sliding surface, which can well adapt to the high-steep slope, with smooth plastering. The whole slip form trolley is lifted, reducing the movement of operators on the slope, reducing potential safety hazards, and improving operation efficiency, solving the problems of difficult construction, high investment, low efficiency, and poor surface flatness in high-steep slopes. After the slope is poured, only the plug of the drain pipe embedded in the drilling needs to be removed, and the slope protection board can be integrally formed. This method has simple steps, convenient operation, and good effects.

[0007] As a preferred technical solution of the present utility model, in step S1, the set depth is 1m - 2m.

[0008] As a preferred technical solution of the present utility model, in step S1, the drain pipe is made of plastic pipe.

[0009] As a preferred technical solution of the present utility model, in step S2, the diameter of the anchor rod is 20mm - 30mm, and the length is 4m - 6m.

[0010] As a preferred technical solution of the present utility model, in step S2, the anchor rods are arranged in a quincunx pattern.

[0011] As a preferred technical solution of the present utility model, in step S2, the diameter of the steel bar is 10mm - 16mm.

[0012] As a preferred technical solution of the present utility model, in step S3, a winch is set at the anchoring point, and the winch is connected to the slip form trolley through the towing rope; alternatively, a winch is set on the slip form trolley, and the winch is connected to the anchoring point through the towing rope.

[0013] As a preferred technical solution of the present utility model, in step S3, first pour 1m - 2m high concrete at the bottom of the slope as the uphill point, and use a crane to hoist the slip form trolley to the uphill point.

[0014] As a preferred technical solution of the present utility model, in step S3, the slip form trolley is lifted upward after every 1m - 2m height of concrete construction until the pouring of the slope in this cycle is completed.

[0015] As a preferred technical solution of the present utility model, in step S4, the thickness of the slope protection plate is 30 cm - 50 cm.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: For a construction method of a high-steep slope, the slope is excavated and drilled simultaneously, avoiding the drilling operation of the drilling machine under a large height difference, eliminating the need to set up a scaffold to raise the drilling machine, improving the stability, timeliness and economy of drilling. The soil residues generated by drilling are cleaned up immediately after the subsequent excavation of the slope and do not need to be cleaned separately. The trackless slip form is used for the construction of the high-steep slope. Only the side form needs to be installed. The slip form trolley uses the top of the side form or the adjacent concrete slab surface that has been poured and formed as the supporting sliding surface, which can well adapt to the high-steep slope, with a smooth plastering surface. The overall lifting of the slip form trolley reduces the movement of operators on the slope, reduces potential safety hazards, improves the operation efficiency, and solves the problems of large construction difficulty, high investment, low efficiency and poor surface flatness in the high-steep slope. After the slope is poured, only the plug of the drain pipe embedded in the drilling needs to be removed, and the slope protection plate can be integrally formed. This method has simple steps, convenient operation and good effects. Description of the Drawings

[0017] Figure 1 It is a schematic flow chart of the construction method of the high-steep slope; Figure 2 It is a schematic diagram of the high-steep slope; Figure 3 It is a schematic elevation structure diagram of the trackless slip form; Figure 4 It is a schematic elevation structure diagram of the slip form trolley.

[0018] Markings in the figure: 1 - slope, 11 - bench, 12 - support frame; 2 - side form; 3 - slip form trolley, 31 - steel panel, 32 - main beam, 33 - operation platform, 34 - first railing, 35 - trimming platform, 36 - second railing; 4 - towing rope; 5 - winch; 6 - concrete; 7 - drain pipe; 8 - anchor bolt. Detailed Embodiments

[0019] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments. All technologies implemented based on the content of the present invention belong to the scope of the present invention.

[0020] Unless otherwise specified, in the description of the specific embodiments of the present invention, the expression terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the invention product / device / installation is commonly used. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present invention or simplifying the description in the specific embodiments, so as to facilitate technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present invention.

[0021] In addition, for terms such as "horizontal", "vertical", "hanging", "parallel", etc., it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but it can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in the directions of "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.

[0022] In addition, for the expressions such as "first", "second", "third", etc. in the terms, they are only used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of a specific component.

[0023] In addition, in the description of the embodiments of the present invention, "several", "multiple", "a plurality of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be a situation exceeding 9.

[0024] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / limited, where the terms "set", "install", "connect", "link", "provided with", "lay", "arrange" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be connection means commonly used in the art such as welding, riveting, bolting, threaded connection, etc. This connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements.

[0025] In the related art, taking a certain project as an example, the height difference of this circular slope is 16 m and the slope is 1:1, belonging to a high and steep slope. There are problems with the cast-in-place concrete slope protection slab, such as a steep slope, a large height difference, and great construction difficulty. At the same time, if the slope excavation is completed first and the drain pipe is drilled and installed after the slope protection slab is formed, a drilling machine support more than 10 m high needs to be erected, with low operation efficiency, poor stability, timeliness, and economy, and the soil residue after drilling also needs to be cleaned up. Therefore, the technical solution of this application is generated. The following will be described in combination with Figures 1 to 4 is elaborated.

[0026] Example 1 As Figures 1 to 4 shown, a construction method for a high and steep slope according to the present invention includes the following steps: Step 1: Excavate the high and steep slope 1. For every set depth of excavation, use a drilling machine to perform drilling operations along with the excavation of the slope 1. There is no need to erect a support. During drilling, a drain pipe 7 is buried, and the outlet of the drain pipe 7 is sealed with a plug. Repeat this process to complete the excavation of the slope 1 in this cycle.

[0027] Among them, assuming that the total height difference of the slope 1 is 30 m, then the slope 1 can be excavated in two excavation cycles, with a height difference of 15 m for each cycle. In each cycle, the set depth of excavation can be 1 m - 2 m, that is, gradually excavate 1 m - 2 m from top to bottom until 15 m deep is excavated to complete the excavation of the slope 1 in this cycle. After the slope protection slab of the excavated slope 1 is made, enter the excavation of the slope 1 with a 15 m height difference in the next cycle.

[0028] In some alternative embodiments, as Figure 2 shown, the drain pipe 7 is made of a plastic pipe, preferably a PVC pipe, and the outlet of the drain pipe 7 is inclined upward from one end to the other.

[0029] Step 2: Construct anchor bolts 8 on the slope 1 and carry out steel bar binding.

[0030] In some alternative embodiments, as Figure 2 shown, the construction of the anchor bolts 8 uses a crawler-type anchoring drilling rig for anchor bolt drilling construction. The diameter of the anchor bolts 8 is 20 mm - 30 mm, and the length is 4 m - 6 m. The anchor bolts 8 are arranged in a plum blossom shape, and the adjacent anchor bolts 8 are spaced 2 m - 3 m apart. In this embodiment, the anchor bolts 8 are C25 anchor bolts, with lengths of 4 m and 6 m. The anchor bolts 8 of the two models of 4 m and 6 m are alternately arranged along the elevation, and the adjacent anchor bolts 8 are spaced 2.5 m apart.

[0031] In some alternative embodiments, the diameter of the steel bars is 10 mm - 16 mm, and manual binding of the slope steel bar mesh is adopted. In this embodiment, the steel bars are arranged in a double layer of C12@200 mm steel bars.

[0032] Step 3: Use a trackless slip form to construct the concrete 6 of the slope 1. Set an anchoring point on the berm 11 at the top of the slope 1 in this cycle, set up side forms 2 and a slip form trolley 3. The slip form trolley 3 is connected to the anchoring point by a traction rope 4. The slip form trolley 3 slides upward along the side form 2 through the traction rope 4 and constructs the concrete 6.

[0033] The process principle of the trackless slip form is to use the side form 2 or the already cast concrete 6 to replace the track. Its structure is simple, saving track materials, reducing construction procedures, and lowering labor intensity. It has the characteristics of simple process, economic practicality, and high construction efficiency.

[0034] As Figure 3 shown, the trackless slip form includes the side form 2, the slip form trolley 3, the traction rope 4, and a winch 5. The winch 5 serves as a driving device. In this embodiment, a support frame 12 is set at the anchoring point, and the winch 5 is set on the support frame 12. The winch 5 is connected to the slip form trolley 3 through the traction rope 4; in some other embodiments, the winch 5 can also be set on the slip form trolley 3, and the winch 5 is connected to the anchoring point through the traction rope 4.

[0035] As Figure 3 and Figure 4 shown, the slip form trolley 3 includes a steel panel 31, main beams 32, an operation platform 33, and a finishing platform 35. The operation platform 33 is horizontally arranged, the steel panel 31 is arranged obliquely according to the slope. The steel panel 31 and the operation platform 33 are connected as a whole by the main beams 32. The steel panel 31 is located below the operation platform 33. The main beams 32 also connect the finishing platform 35. The finishing platform 35 is located at the rear lower part of the operation platform 33. The steel panel 31 overlaps on the side forms 2 on both sides or the concrete 6 slope protection plates that have been cast. The steel panel 31 actually forms the top form for the concrete 6 pouring. A counterweight is provided on the slip form trolley 3 to press the steel panel 31 to prevent the steel panel 31 from floating during the concrete 6 pouring. The operation platform 33 is used for construction workers to operate, assisting in the feeding and vibration construction of the concrete 6. The finishing platform 35 is used for construction workers to operate and perform plastering construction on the concrete 6. A first railing 34 is provided on the operation platform 33, and a second railing 36 is provided on the finishing platform 35.

[0036] For example, the slip form trolley 3 can be assembled by splicing channel steel, angle steel, steel plates, etc. It uses 14-channel steel as the framework, 0.6-mm-thick steel plates as the flat plates, and 3×3-mm angle steel as the first railing 34 and the second railing 36. The structural dimensions of the slip form trolley 3 are determined by the block dimensions of the cast-in-place concrete slab. Assuming that there is a structural joint every 6 m in the cast-in-place concrete slab, the dimensions of the slip form trolley 3 can be set as 6.5 m×1.2 m (length×width). To ensure sufficient strength, stiffness, and integrity in the length direction of the steel panel 31, φ25 hot-rolled ordinary channel steel is used for ribbing and is arranged along the four edges of the steel panel 31 for welding reinforcement treatment.

[0037] The winch 5 serves as the traction power source for the slip form trolley 3. One winch 5 with a traction force of 4 t per unit is fixed on each of the left and right sides of the access road 11 at the top of the slope 1. The positions where the winches 5 are fixed should be strictly measured to ensure that the winches 5, the towing ropes 4, and the lifting lugs of the slip form trolley 3 form a straight line, so as to avoid creating a safety hazard due to uneven diagonal pulling on the slip form trolley 3. The support frame 12 of the winch 5 is welded by 14-channel steel. Expansion nails are driven into the access road 11 to form the anchor points for fixing the support frame 12. The towing ropes 4 are made of steel wire ropes, and the winches 5 and the slip form trolley 3 are connected by 16-mm-diameter steel wire ropes.

[0038] Since the slope ratio of the slope 1 is 1:1 and the slope is relatively steep, to prevent the slip form trolley 3 from floating during concrete vibration in construction, it is necessary to consider the calculation of the self-weight or counterweight of the slip form trolley 3 and the upward supporting force of the newly poured concrete on the steel panel 31. The self-weight plus the counterweight of the slip form trolley 3 should be greater than the floating force generated on the steel panel 31 during concrete pouring.

[0039] The cast-in-place concrete slope protection slab is poured in one time by using the trackless slip form for vibration, and is transported into the bin by a 25-t truck crane + 1.0-m³ lifting bucket. The material consumption per cubic meter of concrete is as follows: 129 kg of ordinary Portland cement, 100 kg of S95 slag powder, 57 kg of class F grade II fly ash, 883 kg of manufactured sand, 755 kg of 5-mm - 20-mm crushed stones, 324 kg of 20-mm - 40-mm crushed stones, 152 kg of mixing water, and 3.4 kg of admixture; the concrete mix ratio is cement: slag powder: fly ash: manufactured sand: 5-mm - 20-mm crushed stones: 20-mm - 40-mm crushed stones: water: admixture = 1:0.78:0.44:6.84:5.85:2.51:1.18:0.027, water-binder ratio: 0.53, sand ratio: 45%, slump 140±20 mm.

[0040] Before pouring the concrete 6, the geometric dimensions and diagonal of the steel panel 31 should be checked, and the anchor bars should be bent inward to avoid affecting the movement of the slipform trolley 3. Before the subsequent construction, it is necessary to ensure that there is no debris inside the steel panel 31, and carefully check the key parameters such as the type, spacing, size and position of the steel bars to ensure that they are accurate. At the same time, the position and stability of the pre-buried drainage pipe 7 and the plugging parts must also be strictly checked before the pouring of the concrete 6 can be carried out.

[0041] In addition, the first layer of concrete (1m-2m in height) at the bottom of the slope 1 is poured as the uphill point of the slipform trolley 3 to prepare for the uphill movement of the slipform trolley 3. After the first layer of concrete is poured, the slipform trolley 3 is hoisted to the first layer of concrete surface using a 35t truck crane, and the slipform trolley 3 is connected to the winch 5 through the traction rope 4. The tightness and verticality of the traction rope 4 are checked. After the inspection is completed, the slipform trolley 3 is run empty once. After it is correct, the staff enters the slipform trolley 3 to carry out the unloading, vibration and plastering of the lower layer of concrete 6.

[0042] During the construction process, key parameters such as the vibration time (standard range is between 5 and 8 seconds) and the sliding speed (standard range is between 2 and 3 meters / hour) determined by the production and construction test are strictly followed. In order to ensure the quality of the concrete 6 vibration, a 50-type vibrating rod is used to ensure that the concrete 6 is not over-vibrated, not missed, and not under-vibrated, so as to achieve the effect of deep vibration and surface slurry lifting of the concrete 6; this measure is conducive to the surface finishing and leveling of the concrete 6 surface, ensuring the stability and reliability of the construction quality; the concrete 6 is poured from bottom to top at one time, and when entering the warehouse, it should be evenly distributed alternately on both sides of the steel panel 31, and the thickness of each layer of distribution is 25cm-30cm. After distribution, the concrete 6 that is higher than the slipform trolley 3 is promptly shoveled and vibrated to be dense. The vibrator should vibrate at the front of the slipform trolley 3 and must not be inserted into the bottom of the steel panel 31.

[0043] During the construction, the workers on the finishing platform 35 are required to carefully check the vibration and plastering operations in the quality monitoring. If any problems such as exposed stones, honeycombs, rough surfaces or transverse cracks are found, they must be remedied immediately. For the concrete 6 that has not yet set, it must be vibrated in time. For the concrete that has already set, it must be removed first and then filled with raw concrete and re-vibrated to ensure that the construction quality meets the standards. The workers on the upper operating platform 33 are responsible for laying the materials and vibrating them to make them dense. The workers on the lower finishing platform 35 are responsible for calendering and finishing the surface during the rising process of the slipform trolley 3. The slope 1 is steeper and it is difficult for the finishing workers to stand. A pedal with the same length as the steel panel 31 can be made and welded to the main beam 32 to facilitate the plastering and polishing of the concrete 6. During the plastering and polishing process, a 2m ruler is used to check the flatness of the concrete 6 at any time.

[0044] After the slipform trolley 3 constructs 1 m - 2 m height of the concrete 6, it is lifted upward until the pouring of the slope 1 in this cycle is completed.

[0045] Step 4: After the concrete 6 begins to set, remove the plug of the drain pipe 7 to form the slope protection board, and the thickness of the slope protection board is 30 cm - 50 cm.

[0046] The concrete 6 should be covered with geotextile and watered for curing 10 - 12 hours after the pouring is completed.

[0047] The application effect of the trackless slipform in the high and steep slope is good. The structural lines are straight, the flatness is good, and there are no obvious quality defect problems. In terms of safety, it reduces the movement of operators on the slope 1 and greatly reduces potential safety hazards; in terms of progress, the construction efficiency of the conventional formwork operation is 1 m - 1.5 m per hour, and the construction efficiency of using the trackless slipform is 2 m - 3 m per hour, which greatly saves construction time, reduces labor intensity, and shortens the construction period.

[0048] For the construction method of a high and steep slope described in this embodiment, the slope 1 is drilled while being excavated, which avoids the drilling operation of the drilling machine under a large height difference and does not require setting up a support to raise the drilling machine, improving the stability, timeliness and economy of drilling. The soil residues generated by drilling are cleaned up immediately after the subsequent excavation of the slope 1 and do not need to be cleaned separately; the trackless slipform is used for the construction of the high and steep slope 1. Only the side form 2 needs to be installed. The slipform trolley 3 uses the top of the side form 2 or the concrete 6 board surface of the adjacent already poured and formed part as the support sliding surface, which can well adapt to the high and steep slope 1, and the plastering is flat. The whole slipform trolley 3 is lifted, reducing the movement of operators on the slope 1, reducing potential safety hazards, improving the operation efficiency, and solving the problems of large construction difficulty, large investment, low efficiency and poor surface flatness in the high and steep slope 1. After the slope 1 is poured, only the plug of the drain pipe 7 embedded in the drilling needs to be removed to form the slope protection board as a whole; this method has simple steps, convenient operation and good effects.

[0049] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction method for a high-steep slope, characterized in that, It includes the following steps: S1. Excavate the high-steep slope (1). For every set depth of excavation, use a drilling machine to conduct drilling operations along with the excavation of the slope (1). There is no need to set up a scaffold. During drilling, bury a drain pipe (7), and seal the outlet of the drain pipe (7) with a plug. Repeat this process to complete the excavation of the slope (1) in this cycle. S2. Construct anchor bolts (8) on the slope (1) and carry out steel bar binding. S3. Use a trackless slip form to construct the concrete (6) of the slope (1). Set an anchoring point on the berm (11) at the top of the slope (1) in this cycle, set side forms (2) and a slip form trolley (3). Connect the slip form trolley (3) and the anchoring point through a towing rope (4). The slip form trolley (3) slides upward along the side form (2) through the towing rope (4) and constructs the concrete (6). S4. After the concrete (6) begins to set, remove the plug of the drain pipe (7) to form a slope protection board.

2. The construction method of the high-steep slope according to claim 1, characterized in that, In step S1, the set depth is 1 m - 2 m.

3. The construction method of the high-steep slope according to claim 1, characterized in that, In step S1, the drain pipe (7) is made of plastic pipe.

4. The construction method of the high-steep slope according to claim 1, characterized in that, In step S2, the diameter of the anchor bolt (8) is 20 mm - 30 mm, and the length is 4 m - 6 m.

5. The construction method of the high and steep slope according to claim 1, characterized in that, In step S2, the anchor bolts (8) are arranged in a quincunx pattern.

6. The construction method of the high-steep slope according to claim 1, characterized in that, In step S2, the diameter of the steel bar is 10 mm - 16 mm.

7. The construction method of the high-steep slope according to claim 1, characterized in that, In step S3, set a winch (5) at the anchoring point, and connect the winch (5) and the slip form trolley (3) through the towing rope (4). Alternatively, set a winch (5) on the slip form trolley (3), and connect the winch (5) and the anchoring point through the towing rope (4).

8. The construction method of the high and steep slope according to claim 1, characterized in that, In step S3, first pour the concrete (6) with a height of 1 m - 2 m at the bottom of the slope (1) as the uphill point, and use a crane to hoist the slip form trolley (3) to the uphill point.

9. The construction method of the high and steep slope according to claim 1, characterized in that, In step S3, after the slip form trolley (3) constructs the concrete (6) with a height of 1 m - 2 m each time, it is lifted upward until the pouring of the slope (1) in this cycle is completed.

10. The construction method of the high-steep slope according to any one of claims 1-9, characterized in that, In step S4, the thickness of the slope protection board is 30 cm - 50 cm.

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