High slope road construction method

Abstract

The application relates to a high-slope road construction method, and relates to the technical field of road construction, and comprises the following steps: S100, subgrade excavation, S200, supporting base excavation, S300, reinforcing the supporting base, S400, setting up a retaining wall, S500, laying a backfill layer, S600, laying a surface layer 104, and S700, pouring a protective pile; the protective pile is used to form a safety protection effect on the side of the road, replaces the method that a traditional reserved edge soil body is used as a road shoulder and a protective fence is arranged on the road shoulder, can effectively avoid the problem that the edge soil body at the road shoulder slips and collapses due to construction operation in the construction process; and through the combination of the road foundation pit, the supporting foundation pit, the retaining wall, the protective pile and the anchor rod, a three-dimensional reinforcing system is formed, the system provides strong support in the vertical and horizontal directions, effectively disperses the pressure of the slope soil body, reduces the stress concentration of a single structure, prevents local instability, and ensures the long-term stability and safety of the road.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road construction, in particular to a high-slope road construction method. BACKGROUND

[0002] The high-slope road refers to the road adjacent to the downward high and steep slope on at least one side, and is usually built on the mountain slope or hilly area, such as the mountainous road section, the slope road section, etc. The soil and rock layer of these areas has poor natural stability due to the steep terrain, and the gravity makes the soil and rock have a tendency to slide to the low place, especially under the action of external forces such as rain season or earthquake, and this tendency is more obvious.

[0003] During the construction process of the high-slope road, a certain edge soil body is usually reserved as a shoulder near the road adjacent to the slope, which is used for setting safety facilities such as guardrails. However, during the road construction process, the steps of excavation, soil filling, compaction, etc. will form disturbance to the ground surface, destroy the natural stable state, especially the excavation of the roadbed and the ramming of the roadbed, which are limited to the space of the mountain road. The width of the shoulder is usually thin, that is, when the road foundation pit is excavated downward, the thickness of the edge soil body near the slope side of the foundation pit adjacent to the slope is thin, so that the shoulder is easy to lose supporting force, and the vibration is formed when the roadbed is rammed, which is easy to cause the lateral slip and even collapse of the edge soil body at the shoulder, causing safety accidents.

[0004] Even after the completion of the construction, the edge soil body near the slope adjacent to the slope of the high-slope road, especially the shoulder, is very easy to gradually lose stability due to traffic load and environmental changes (such as rainfall, snowmelt, earthquake), and finally slide and even collapse, affecting traffic safety.

[0005] Therefore, it is necessary to study a high-slope road construction method. SUMMARY

[0006] In view of this, the purpose of the present application is to provide a high-slope road construction method, which can effectively solve the problem that the high-slope road adjacent to the slope is easy to slide and collapse during the construction process and after the completion of the construction.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present application is:

[0008] A high-slope road construction method, comprising the following steps:

[0009] S100: excavating the roadbed;

[0010] pretreating the construction area to obtain a flat road working surface;

[0011] excavating downward from the surface of the road working surface, and extending the excavation surface to the right to the slope to form an L-shaped road foundation pit;

[0012] The bottom of the road foundation pit is rammed to form a roadbed;

[0013] S200: excavating a support base layer;

[0014] Further excavating from the surface of the roadbed to the right side of the roadbed, the excavated surface extends to the slope to the right to form an L-shaped support foundation pit on the right side of the road foundation pit;

[0015] The bottom of the support foundation pit is rammed to form a support base layer;

[0016] S300: reinforcing the support base layer;

[0017] The first anchor rod is used to anchor downward from the support base layer, and the upper end of the first anchor rod extends upward out of the support base layer;

[0018] S400: setting a retaining wall;

[0019] The retaining wall is vertically arranged on the support base layer, the bottom of the retaining wall is fixedly connected with the first anchor rod, the second anchor rod is arranged on the retaining wall and is inclined downward, the end of the second anchor rod is anchored in the left side wall of the support foundation pit, and the tail of the second anchor rod extends out of the retaining wall to the right;

[0020] S500: laying a backfill layer;

[0021] The backfill layer is formed by backfilling the roadbed with backfill material, and the backfill layer is distributed between the left side wall of the road foundation pit and the retaining wall;

[0022] S600: laying a surface layer;

[0023] The surface layer is laid on the backfill layer;

[0024] S700: pouring a protective pile;

[0025] The continuous protective pile is poured on the support base layer, the left side of the protective pile is attached to the right side of the retaining wall, and the height of the protective pile is greater than the height of the surface layer;

[0026] The upper end of the first anchor rod and the tail of the second anchor rod are pre-buried in the protective pile.

[0027] Further, the retaining wall comprises an integrally formed wall body, a front toe and a rear toe;

[0028] The wall body is vertically arranged on the support base layer, the front toe is horizontally arranged on the left side of the bottom of the wall body, and the rear toe is correspondingly horizontally arranged on the right side of the bottom of the wall body, and the left and right widths of the front toe are greater than the left and right widths of the rear toe;

[0029] The front toe is attached to the side wall of the support foundation pit, so that a gap is formed between the wall body and the side wall of the support foundation pit;

[0030] The backfill layer fills the gap between the wall and the side wall of the supporting foundation pit.

[0031] Further, the upper end of the first anchor rod corresponding to the forefoot or the hind foot is correspondingly threaded through the forefoot or the hind foot and pre-buried in the backfill layer or the protective pile.

[0032] Further, the steps S400 and S500 further comprise a step S450 of setting a temporary support.

[0033] The supporting rod is obliquely arranged on the supporting base layer, the bottom of the supporting rod is detachably fixedly connected with the first anchor rod, and the top of the supporting rod abuts against the right end surface of the retaining wall.

[0034] The tail of the second anchor rod passes through the supporting rod and is detachably fixedly connected with the supporting rod.

[0035] Further, the steps S450 and S500 further comprise a step S460 of erecting a construction platform.

[0036] The construction platform comprises a platform frame, a support column and a protective fence.

[0037] A plurality of support columns are vertically arranged on the supporting base layer, the bottom of each support column is detachably fixedly connected with the upper end of the corresponding first anchor rod, the platform frame is horizontally fixed on the support columns, and the protective fence is arranged on the side of the platform frame close to the slope.

[0038] In the step S700, the temporary support and the construction platform are removed.

[0039] Further, the support column is the same height as the retaining wall, and the left end of the platform frame is arranged on the retaining wall.

[0040] Further, the bottom of the supporting rod is fixedly connected with the corresponding support column on the same first anchor rod, and the top of the supporting rod is fixedly connected with the top of the support column and has a diagonal bracing rod.

[0041] Further, the steps S500 and S600 further comprise a step S550 of setting a drainage layer.

[0042] The drainage layer is formed by laying a water-permeable material on the backfill layer, the right side of the drainage layer is communicated with a drainage pipeline, and the drainage pipeline passes through the retaining wall and extends to the right.

[0043] In the step S700, the drainage pipeline is pre-buried in the protective pile, and the right end of the drainage pipeline extends out of the protective pile and is communicated with the outside.

[0044] Further, the right end surface of the protective pile is provided with a pressing foot, the pressing foot is horizontally arranged on the supporting base layer and is integrally formed with the protective pile, and the pressing foot is fixedly connected with the first anchor rod.

[0045] Further, the step 700 is followed by a step S800 of backfilling the slope protection;

[0046] The slope protection is formed by backfilling on the support base, the left end surface of the slope protection is attached to the right end surface of the protection pile, the right end surface of the slope protection is adapted to the slope gradient, and the height of the slope protection is lower than the protection pile;

[0047] Before backfilling, the first anchor rod corresponding to the pressing foot is lengthened upward, the first anchor rod extends upward out of the slope protection, and the slope protection, the pressing foot and the support base are anchored as a whole by using fasteners.

[0048] The beneficial effects of the above technical solution are:

[0049] (1) The road foundation pit and the support foundation pit are both excavated to the right side of the slope, and no edge soil in the slope direction is reserved as a shoulder, a retaining wall and a protection pile are used to resist the pressure on the right side of the road, and the protection pile is used to form a safety protection effect on the side of the road, which replaces the traditional method of reserving edge soil as a shoulder and setting a protective fence on the shoulder, effectively avoiding the problem of edge soil sliding and collapsing on the shoulder caused by construction operations during construction, and improving the safety of the construction process.

[0050] (2) The support foundation pit is further excavated on the right side of the road foundation pit, and the bottom height of the support foundation pit is lower than the bottom height of the road foundation pit, so that a side vertical surface is formed between the road foundation pit and the support foundation pit, which not only reduces the edge soil on the right side of the road, but also forms a three-dimensional road side reinforcement structure, so that the pressure on the side of the road can be better transmitted and dispersed, and the stress concentration of a single structure is reduced. In addition, the side vertical surface can provide an anchoring point for the second anchor rod, and the second anchor rod is inclined into the side vertical surface, which can better convert the horizontal pressure into the uplift capacity of the second anchor rod, increase the horizontal stability of the overall structure, and prevent horizontal sliding.

[0051] (3) The retaining wall and the protection pile are both arranged on the support foundation pit and are fixedly connected with the first anchor rod and the second anchor rod, and a three-dimensional reinforcement system is formed by the combination of the road foundation pit, the support foundation pit, the retaining wall, the protection pile and the anchor rods, which provides strong support in the vertical and horizontal directions, effectively disperses the pressure of the slope soil, reduces the stress concentration of a single structure, prevents local instability, and ensures the long-term stability and safety of the road. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 It is a schematic diagram of the road before construction;

[0053] Figure 2 It is a schematic diagram of the construction after the roadbed is excavated;

[0054] Figure 3A construction schematic diagram after excavation and reinforcement of the support base layer;

[0055] Figure 4 A construction schematic diagram after setting and reinforcing the retaining wall;

[0056] Figure 5 A construction schematic diagram after laying the backfill layer;

[0057] Figure 6 A road schematic diagram after completion of the construction;

[0058] Figure 7 A construction schematic diagram with temporary support and construction platform;

[0059] Figure 8 A road schematic diagram with slope protection structure.

[0060] Reference signs: 1 is a road working surface, 2 is a slope, 3 is a roadbed, 4 is a support base layer, 5 is a first anchor rod, 6 is a retaining wall, 7 is a second anchor rod, 8 is a protective pile, 9 is a support rod, 10 is a construction platform, 11 is a slope protection, 12 is a diagonal bracing rod, 101 is a road pit, 102 is a support pit, 103 is a backfill layer, 104 is a surface layer, 105 is a drainage layer, 106 is a drainage pipeline, 601 is a wall body, 602 is a front toe, 603 is a rear toe, 801 is a presser foot, 1001 is a platform frame, 1002 is a support column, and 1003 is a protective fence. DETAILED DESCRIPTION

[0061] The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0062] Embodiment 1 aims to provide a high-slope road construction method, which is mainly used for the construction of a mountain road with a downward high slope on one side. The method is aimed at the problem of easy sliding and collapse of the high-slope road on the side near the slope during the construction process and after the construction is completed.

[0063] A high-slope road construction method, comprising the following steps:

[0064] S100: excavate the roadbed 3;

[0065] Before construction, geological survey is needed to understand the geological conditions such as slope soil, rock stratum, and underground water level, assess potential risks, develop detailed construction design, and ensure the feasibility and safety of the scheme.

[0066] Then, the construction area is pretreated, which includes excavating the mountain or widening the initial road, cleaning vegetation and debris, cleaning the loose surface soil, using a bulldozer to clean the road surface to make it flat, and performing dewatering treatment, etc., aiming to obtain a Figure 1The flat road working surface 1 is formed by the method, and the specific pretreatment method is prior art, which will not be described here.

[0067] As shown in Figure 2 , the L-shaped road foundation pit 101 is formed by excavating downward from the surface of the road working surface 1 and extending the excavation surface to the slope on the right side, and no shoulder is reserved on the side close to the slope, so as to avoid the shoulder from sliding and collapsing under construction disturbance during construction.

[0068] The excavated supporting base layer 4 is leveled and compacted in layers by using a bulldozer or a grader to form the roadbed 3. According to the specific conditions of the mountain soil, the roadbed 3 can be reinforced by using pile foundation processes such as powder jetting pile and reinforced concrete pile to ensure the compactness and stability of the roadbed 3.

[0069] S200: Excavating the supporting base layer 4;

[0070] As shown in Figure 2 , the L-shaped supporting foundation pit 102 is formed by further excavating downward from the surface of the roadbed 3 on the right side of the roadbed 3 to provide sufficient depth and width for the construction of the retaining wall 6, the second anchor rod 7 and other supporting structures, and extending the excavation surface to the slope 2 on the right side of the road foundation pit 101; the bottom of the supporting foundation pit 102 is compacted to form the supporting base layer 4; excavating the supporting base layer 4 not only reduces the edge soil on the right side of the road, but also forms a side vertical surface between the road foundation pit 101 and the supporting foundation pit 102, thereby forming a three-dimensional road side reinforcement structure, so that the pressure on the road side can be better transmitted and dispersed, and the stress concentration of a single structure is reduced.

[0071] S300: Reinforcing the supporting base layer 4;

[0072] As shown in Figure 3 , the first anchor rod 5 is used to vertically anchor downward from the supporting base layer 4 to reinforce the stability of the supporting base layer 4, and the upper end of the first anchor rod 5 extends out of the supporting base layer 4 to form a plurality of fixed foundations.

[0073] S400: Setting the retaining wall 6;

[0074] The retaining wall 6 is vertically arranged on the supporting base layer 4, and the retaining wall 6 can be cast-in-place or prefabricated; the retaining wall 6 includes an integrally formed wall body 601, a front toe 602 and a rear toe 603; the wall body 601 is vertically arranged on the supporting base layer 4, the front toe 602 is horizontally arranged on the left side of the bottom of the wall body 601, and the rear toe 603 is correspondingly horizontally arranged on the right side of the bottom of the wall body 601, and the left and right widths of the front toe 602 are greater than the left and right widths of the rear toe 603; the front toe 602 is attached to the side wall of the supporting foundation pit 102, so that a gap is formed between the wall body 601 and the side wall of the supporting foundation pit 102; as shown in Figure 4The upper end of the first anchor rod 5, corresponding to the front toe 602 or the rear toe 603, passes through the front toe 602 or the rear toe 603, so that the bottom of the retaining wall 6 is fixedly connected to the first anchor rod 5; a second anchor rod 7, inclined downward, passes through the wall body 601 of the retaining wall 6, the end of the second anchor rod 7 is anchored in the left side wall of the support pit 102, and the tail of the second anchor rod 7 extends to the right out of the retaining wall 6.

[0075] S500: Lay backfill layer 103;

[0076] As shown in Figure 5, backfill material is used to backfill the roadbed 3 in stages, and compaction is carried out in stages to form backfill layer 103. The backfill material should have good compaction performance and stability to ensure the overall effect of backfill layer 103. Modified soil, clay, etc. can be used, but it is better to use backfill material with better impermeability to avoid water infiltration and soil loss of anchor foundation.

[0077] Backfill layer 103 is distributed between the left side wall of the road pit 101 and the retaining wall 6. Backfill layer 103 fills the gap between the wall 601 and the side wall of the supporting pit 102, and forms a gravity effect on the front toe 602 of the retaining wall 6, thereby enhancing the stability of the retaining wall 6. The upper end of the first anchor 5, which passes through the front toe 602, is pre-embedded in backfill layer 103, increasing the structural strength of backfill layer 103.

[0078] To facilitate road drainage and prevent water infiltration, step S550 is also included: setting a drainage layer 105;

[0079] like Figure 6 A permeable material is laid on the backfill layer 103 to form a drainage layer 105. The permeable material can be gravel, sand, etc. The right side of the drainage layer 105 is connected to a drainage pipe 106, which passes through the retaining wall 6 and extends to the right.

[0080] To further prevent water infiltration, a waterproof layer can be provided between the drainage layer 105 and the backfill layer 103, and the drainage pipe 106 should be located above the waterproof layer; and to facilitate drainage, the waterproof layer and the drainage pipe 106 should have a slope towards the slope 2.

[0081] S600: Lay out a 104-layer surface layer;

[0082] like Figure 6 A surface layer 104 is laid on the drainage layer 105. The surface layer 104 is mainly the surface structure of the road. The surface layer 104 can include crushed stone base, asphalt layer, concrete layer, etc., depending on actual needs. The construction of the road surface layer 104 is mainly based on existing technology, and will not be elaborated here.

[0083] S700: Cast 8 protective piles;

[0084] As Figure 6 The protective pile 8 is poured on the supporting base 4 and is continuous along the length direction of the road. The left side of the protective pile 8 is attached to the right side of the retaining wall 6 to form a supporting effect on the retaining wall 6. The height of the protective pile 8 is greater than the height of the surface layer 104 to form a protective effect.

[0085] The upper end of the first anchor rod 5 and the tail of the second anchor rod 7 are pre-buried in the protective pile 8. The road foundation pit 101, the supporting foundation pit 102, the retaining wall 6, the protective pile 8, and the anchor rod form a three-dimensional reinforcing system to increase the structural strength of the side of the road near the side slope 2 and effectively resist the sliding of the side of the road.

[0086] The drainage pipeline 106 is pre-buried in the protective pile 8, and the right end of the drainage pipeline 106 extends out of the protective pile 8 and communicates with the outside.

[0087] In example 2, the example is basically the same as example 1, the difference is that a temporary support is arranged for the retaining wall 6 during construction, and a construction platform 10 is arranged for convenient construction. The structure is further described in this example.

[0088] In order to further improve the stability of the retaining wall 6 before pouring the protective pile 8, step S450 is further included between steps S400 and S500: a temporary support is arranged.

[0089] As Figure 7 The supporting rod 9 is arranged obliquely on the supporting base 4. The upper end of the first anchor rod 5 extends out of the supporting base 4 and provides a fixed base. The bottom of the supporting rod 9 is detachably fixedly connected with the first anchor rod 5, and the top of the supporting rod 9 abuts against the right end surface of the retaining wall 6. The tail of the second anchor rod 7 penetrates through the supporting rod 9 and is detachably fixedly connected with the supporting rod 9 to increase the integration degree of the supporting structure. In other examples, the temporary support is not limited to the supporting rod 9. The concept is to use the fixed base provided by the first anchor rod 5 and the second anchor rod 7 to fix the temporary support structure to enhance the supporting effect and the integration degree of the structure.

[0090] Considering that the supporting foundation pit 102, the first anchor rod 5, and the second anchor rod 7 will affect the construction of workers on the side of the road near the side slope 2, in order to facilitate the construction, step S460 is further included between steps S450 and S500 in this example: a construction platform 10 is erected.

[0091] As Figure 7 The construction platform 10 includes a platform frame 1001, a support column 1002, and a protective fence 1003.

[0092] A plurality of support columns 1002 are vertically arranged on the support base 4, the bottom of each support column 1002 is detachably fixedly connected with the upper end of the corresponding first anchor rod 5, the platform frame 1001 is horizontally fixed on the support column 1002, and the side of the platform frame 1001 close to the slope 2 is provided with a guardrail 1003 rod.

[0093] The support column 1002 is the same height as the retaining wall 6, so that the left end of the platform frame 1001 is arranged on the retaining wall 6, which can provide additional support for the platform frame 1001 and provide vertical pressure for the retaining wall 6, thereby enhancing the stability of the retaining wall 6.

[0094] In step S700, the temporary support and the construction platform 10 need to be removed before pouring the protective pile 8.

[0095] In order to further enhance the integration degree of the temporary support and the construction platform 10, the bottom of the support rod 9 is fixedly connected with the corresponding support column 1002 on the same first anchor rod 5, the top of the support rod 9 is fixedly connected with the top of the support column 1002 with a diagonal bracing rod 12, forming a triangular cross structure, as shown in Figure 7 In fact, the upper end of the support rod 9 is also provided with a ground plate in contact with the retaining wall 6, and a horizontal web is further arranged between the ground plate and the support column 1002 to further enrich the triangular cross structure.

[0096] In embodiment 3, the embodiment is basically the same as embodiment 1, the difference is that the structure is further described in this embodiment.

[0097] In order to further improve the stability of the protective pile 8, as shown in Figure 8 The right end surface of the protective pile 8 is provided with a pressing foot 801, the pressing foot 801 is horizontally arranged on the support base 4 and integrally poured and formed with the protective pile 8, and the pressing foot 801 is fixedly connected with the first anchor rod 5.

[0098] In this embodiment, further, step 700 further includes step S800: backfilling the slope protection 11;

[0099] The slope protection 11 is formed by backfilling on the support base 4, the backfilling material can be sand or the like, and can also be backfilled by formwork pouring and anchor spraying concrete, which aims to enhance the stability of the slope 2 and at the same time exert gravity on the corner to enhance the stability of the protective pile 8. The left end surface of the slope protection 11 is in contact with the right end surface of the protective pile 8, the right end surface of the slope protection 11 is adapted to the slope of the slope 2, and the height of the slope protection 11 is lower than that of the protective pile 8, which avoids blocking the drainage pipeline 106 and avoids excessive self weight on the side.

[0100] Before backfilling, the first anchor rod 5 corresponding to the presser foot 801 is lengthened upward, the first anchor rod 5 extends out of the slope protection 11, and the slope protection 11, the presser foot 801 and the support base layer 4 are anchored as a whole by using fasteners, which can be fastening nuts, cooperating with discs and gaskets, to form pressure on the surface of the slope 2 to enhance the stability of the structure.

Claims

1. A method of constructing a high slope road, characterized by, The method comprises the following steps: S100: excavating the roadbed (3); pretreating the construction area to obtain a flat road working surface (1); excavating downward from the surface of the road working surface (1) and extending the excavated surface to the slope (2) to form an L-shaped road foundation pit (101); compacting the bottom of the road foundation pit (101) to form the roadbed (3); S200: excavating the supporting base layer (4); further excavating downward from the surface of the roadbed (3) on the right side of the roadbed (3) and extending the excavated surface to the slope (2) to form an L-shaped supporting foundation pit (102) on the right side of the road foundation pit (101); compacting the bottom of the supporting foundation pit (102) to form the supporting base layer (4); S300: reinforcing the supporting base layer (4); using the first anchor rod (5) to anchor downward from the supporting base layer (4), and extending the upper end of the first anchor rod (5) upward out of the supporting base layer (4); S400: arranging the retaining wall (6); vertically arranging the retaining wall (6) on the supporting base layer (4), fixing the bottom of the retaining wall (6) with the first anchor rod (5), and arranging the second anchor rod (7) through the retaining wall (6) in a downward inclined manner, anchoring the end of the second anchor rod (7) in the left side wall of the supporting foundation pit (102), and extending the tail of the second anchor rod (7) right out of the retaining wall (6); S500: arranging the backfill layer (103); backfilling the roadbed (3) with backfill material to form the backfill layer (103), and arranging the backfill layer (103) between the left side wall of the road foundation pit (101) and the retaining wall (6); S600: arranging the surface layer (104); arranging the surface layer (104) on the backfill layer (103); S700: pouring the protective pile (8); pouring the continuous protective pile (8) on the supporting base layer (4), abutting the left side of the protective pile (8) with the right side of the retaining wall (6), and arranging the height of the protective pile (8) to be greater than the height of the surface layer (104); the upper end of the first anchor rod (5) and the tail of the second anchor rod (7) are both embedded in the protective pile (8).

2. The method of claim 1, wherein: The retaining wall (6) comprises an integrally formed wall body (601), a front toe (602) and a rear toe (603); vertically arranging the wall body (601) on the supporting base layer (4), horizontally arranging the front toe (602) on the left side of the bottom of the wall body (601), horizontally arranging the rear toe (603) on the right side of the bottom of the wall body (601), and arranging the left and right widths of the front toe (602) to be greater than the left and right widths of the rear toe (603); abutting the front toe (602) with the side wall of the supporting foundation pit (102) to form a gap between the wall body (601) and the side wall of the supporting foundation pit (102); In step S500, the backfill layer (103) fills the gap between the wall body (601) and the side wall of the supporting foundation pit (102).

3. The method of claim 2, wherein: The upper end of the first anchor rod (5) corresponding to the front toe (602) or the rear toe (603) is arranged through the front toe (602) or the rear toe (603) and is embedded in the backfill layer (103) or the protective pile (8).

4. The method of claim 1, wherein: The step S400 and S500 further comprise the step S450 of arranging a temporary support. The supporting rod (9) is arranged obliquely on the supporting base (4), the bottom of the supporting rod (9) is detachably fixedly connected with the first anchor rod (5), and the top of the supporting rod (9) abuts on the right end surface of the retaining wall (6); The tail of the second anchor rod (7) penetrates through the supporting rod (9) and is detachably fixedly connected with the supporting rod (9).

5. The method of claim 4, wherein: The step S450 and the step S500 further include a step S460 of erecting a construction platform (10); The construction platform (10) comprises a platform frame (1001), a support column (1002) and a protective fence (1003); A plurality of support columns (1002) are vertically arranged on the supporting base (4), the bottom of each support column (1002) is detachably fixedly connected with the upper end of the corresponding first anchor rod (5), the platform frame (1001) is horizontally fixed on the support column (1002), and the protective fence (1003) is arranged on the side of the platform frame (1001) close to the slope (2). In the step S700, the temporary support and the construction platform (10) are removed.

6. The method of claim 5, wherein: The support column (1002) is the same height as the retaining wall (6), and the left end of the platform frame (1001) is arranged on the retaining wall (6).

7. The method of claim 5, wherein: The bottom of the supporting rod (9) is fixedly connected with the corresponding support column (1002) on the same first anchor rod (5), and the top of the supporting rod (9) is fixedly connected with the top of the support column (1002) and has a diagonal bracing rod (12).

8. The method of claim 1, wherein: The step S500 and the step S600 further include a step S550 of arranging a drainage layer (105); The drainage layer (105) is arranged on the backfill layer (103) by using a water-permeable material, and the right side of the drainage layer (105) is communicated with a drainage pipeline (106), the drainage pipeline (106) penetrates through the retaining wall (6) and extends to the right; In the step S700, the drainage pipeline (106) is pre-buried in the protective stake (8), and the right end of the drainage pipeline (106) extends out of the protective stake (8) and is communicated with the outside.

9. The method of claim 1, wherein: The right end surface of the protective stake (8) is provided with a pressing foot (801), the pressing foot (801) is horizontally arranged on the supporting base (4) and is integrally formed with the protective stake (8), and the pressing foot (801) is fixedly connected with the first anchor rod (5).

10. The method of claim 8, wherein: The step 700 further includes a step S800 of backfilling the slope (11). The slope (11) is formed by backfilling on the supporting base (4), the left end surface of the slope (11) is attached to the right end surface of the protective stake (8), the right end surface of the slope (11) is adapted to the slope (2), and the height of the slope (11) is lower than that of the protective stake (8); Before backfilling, the first anchor rod (5) corresponding to the pressing foot (801) is lengthened upward, the first anchor rod (5) extends out of the slope (11), and the slope (11), the pressing foot (801) and the supporting base (4) are anchored as a whole by using a fastener.

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