A fabricated low wall and a method of using the same

Abstract

The application relates to a fabricated low wall and a use method thereof, and the fabricated low wall comprises a first prefabricated block, a second prefabricated block, a third prefabricated block and a fourth prefabricated block. The fabricated low wall is used for the low wall which is needed to be arranged in a cutting section, the low wall is fabricated, the low wall engineering is first used in a temporary traffic-keeping engineering in slope excavation through cooperation of a limiting groove and a limiting protrusion, the fabricated structure is connected in series through insertion of a vertical rod into a reserved hole and pouring and sealing of the hole, the whole is stressed, rockfall attack is effectively resisted, the vertical rod can be matched with some external components (such as a protective net) to form a better temporary fence, the temporary low wall is disassembled into single blocks after the slope excavation is completed, and the single blocks are moved to the inner side of the slope to be reassembled into the low wall of the cutting section, and a permanent supporting purpose is achieved; the scheme well solves the current problem of temporary protection in cutting excavation, the low fence engineering of permanent support is temporarily used in road traffic-keeping, and the engineering cost is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of road construction, in particular to an assembled low wall and a using method thereof. BACKGROUND

[0002] For the reconstruction and expansion project of mountainous road, due to the high height of the slope and the inability to construct in sections, temporary traffic maintenance measures are needed to isolate the construction area and the road. Figure 1 As shown in the drawings, the current domestic temporary traffic maintenance measures commonly adopt color steel fences or temporary guardrails and other forms, these structural forms are single, the overturning resistance and compression resistance are low, and in the use process, the temporary traffic maintenance measures are often broken by slope rockfall, the rockfall impacts the passing road surface and crashes vehicles, causing great safety hazards to highway reconstruction and expansion construction and highway traffic. SUMMARY

[0003] The present application aims at the problems in the prior art that the existing temporary traffic maintenance measures are easily broken by slope rockfall in the use process, causing great safety hazards to highway reconstruction and expansion construction and highway traffic, and provides an assembled low wall and a using method thereof.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0005] In a first aspect, the present application provides an assembled low wall, comprising a first prefabricated block, a second prefabricated block, a third prefabricated block and a fourth prefabricated block, the top surface of the first prefabricated block, the second prefabricated block and the third prefabricated block is respectively provided with a limiting groove, the bottom surface of the second prefabricated block, the third prefabricated block and the fourth prefabricated block is respectively provided with a limiting protrusion, the limiting protrusion can be matched in the limiting groove, the first prefabricated block, the second prefabricated block, the third prefabricated block and the fourth prefabricated block are respectively provided with a reserved hole penetrating from top to bottom, and the height of the third prefabricated block is greater than the height of the second prefabricated block.

[0006] Before the slope excavation, the assembled low wall is configured to be stacked with at least one second prefabricated block and at least one third prefabricated block, a vertical rod is inserted into the reserved hole and the hole is poured, the height H1 of the assembled low wall is greater than or equal to 1.5 m, and the thickness of the assembled low wall is greater than or equal to 1 m.

[0007] After the slope excavation, the assembled low wall is moved to the slope toe and is configured to be stacked with the first prefabricated block, the second prefabricated block and the fourth prefabricated block in turn from bottom to top or to be stacked with the first prefabricated block, the third prefabricated block and the fourth prefabricated block in turn from bottom to top, and the reserved hole is poured to form an integral whole.

[0008] The assembled low wall utilizes the low wall that needs to be arranged in the road cutting section, the low wall is arranged in an assembled mode, the low wall is used in the temporary pass-through engineering of the slope excavation through cooperation of the limiting groove and the limiting protrusion, the assembled low wall is connected in series through insertion of the vertical rod into the reserved hole and pouring and sealing of the hole, the whole is stressed, the assembled low wall can effectively resist rockfall attack, the vertical rod can be matched with some external components (such as a protective net) to form a better temporary fence, the temporary low wall is disassembled into single blocks after the slope excavation, and then the single blocks are moved to the inner side of the slope to be reassembled into the low wall of the road cutting section, and the permanent support purpose is achieved; the scheme well solves the problem of the temporary protection of the road cutting excavation, the low wall engineering of the permanent support is temporarily used in the road pass-through, and the engineering cost is saved.

[0009] As a preferred technical scheme of the present application, the cross section of the first prefabricated block is wedge-shaped, the cross sections of the second prefabricated block and the third prefabricated block are both right-angled trapezoidal, and the cross section of the fourth prefabricated block is trapezoidal.

[0010] As a further preferred technical scheme of the present application, the front surface of the second prefabricated block and the third prefabricated block forms a facade after being assembled, and faces the road; the back surface of the first prefabricated block, the second prefabricated block and the fourth prefabricated block forms an inclined surface after being assembled, and is used for abutting against the slope toe; the back surface of the first prefabricated block, the third prefabricated block and the fourth prefabricated block forms an inclined surface after being assembled, and is used for abutting against the slope toe.

[0011] As a preferred technical scheme of the present application, the first prefabricated block, the second prefabricated block, the third prefabricated block and the fourth prefabricated block are made of reinforced concrete or plain concrete.

[0012] As a preferred technical scheme of the present application, the limiting protrusion and the limiting groove are interchanged in position.

[0013] As a preferred technical scheme of the present application, the first prefabricated block, the second prefabricated block, the third prefabricated block and the fourth prefabricated block are consistent in length, and the length is 3m-4m.

[0014] As a preferred technical scheme of the present application, the vertical rod extends out of the top surface of the reserved hole, and the length of the vertical rod is 5m-7m.

[0015] As a further preferred technical scheme of the present application, the extending part of the vertical rod is provided with a protective net.

[0016] With this structure, on one hand, the vertical rod connects the prefabricated blocks of the assembled low wall, and on the other hand, the vertical rod is used to arrange the protective net, so as to jointly resist rockfall and improve the protection effect.

[0017] As a preferred technical scheme of the present application, the vertical rod is made of a steel rail.

[0018] With the structure, a large number of old rail leasing companies exist in the current market, which can effectively improve the overall strength of the low wall, prevent rockfall, and return to the leasing company after the old rail is removed, so that the scheme has good engineering effect and remarkable economic value.

[0019] As a preferred technical scheme of the present application, the first prefabricated block and the second prefabricated block are fixed against the slope toe, and a drainage ditch is arranged on the front surface; or the first prefabricated block and the third prefabricated block are fixed against the slope toe, and a drainage ditch is arranged on the front surface.

[0020] In a second aspect, the present application also provides a use method of the prefabricated low wall, comprising the following steps:

[0021] S1, before the slope excavation, the prefabricated low wall is arranged between the existing slope toe and the road to isolate the construction area and the road, the prefabricated low wall is arranged by stacking at least one second prefabricated block and at least one third prefabricated block, the vertical rod is inserted into the reserved hole and the hole is poured and sealed, and the prefabricated low wall forms a temporary traffic maintenance measure;

[0022] S2, after the slope excavation, the vertical rod is pulled out of the reserved hole by using mechanical equipment, the second prefabricated block and the third prefabricated block are hoisted and moved, the first prefabricated block, the second prefabricated block and the fourth prefabricated block are stacked in sequence from the new slope toe to the bottom, or the first prefabricated block, the third prefabricated block and the fourth prefabricated block are arranged, and the reserved hole is poured and sealed to form an integral whole.

[0023] The use method of the prefabricated low wall can utilize the low wall that needs to be arranged in the cutting section, the low wall is arranged in a prefabricated manner, the low wall is used in the temporary traffic maintenance engineering of the slope excavation through the cooperation of the limiting groove and the limiting protrusion, the prefabricated low wall is connected in series through the vertical rod inserted into the reserved hole and the hole poured and sealed, the whole is subjected to stress, and the rockfall attack is effectively resisted, the vertical rod can also be matched with some external components (such as protective nets) to form a better temporary fence, and the temporary low wall is disassembled into single blocks after the slope excavation, and is moved to the inside of the slope to be reassembled into the low wall of the cutting section, so as to achieve the purpose of permanent support, and the problem of temporary protection of the cutting excavation is solved, the low wall engineering of the permanent support is temporarily used in the road traffic maintenance, and the engineering cost is saved.

[0024] As described above, due to the adoption of the above technical scheme, the present application has the following beneficial effects:

[0025] 1. The assembled low wall and its use method, which utilizes the low wall that needs to be set in the cutting section, adopts an assembled structure, and through the cooperation of the limiting groove and the limiting protrusion, the low wall engineering is first utilized in the temporary pass-through engineering of slope excavation, the assembled structure is connected in series through the vertical rod inserted into the reserved hole and the pouring hole, the whole is stressed, the rockfall attack is effectively resisted, the vertical rod can also be matched with some external components (such as protective nets) to form a better temporary fence; after the slope excavation is completed, the temporary low wall is disassembled into single blocks and moved to the inside of the slope to be reassembled into a low wall of the cutting section, so as to achieve the purpose of permanent support; the scheme well solves the current problem of temporary protection of cutting excavation, and the low wall engineering of permanent support is temporarily used in road pass-through, thereby saving the engineering cost;

[0026] 2. The preferred assembled low wall, the vertical rod extension part is provided with a protective net, which on the one hand connects the prefabricated blocks of the assembled low wall through the vertical rod, and on the other hand arranges the protective net through the vertical rod, so as to jointly resist rockfall and improve the protection effect;

[0027] 3. The preferred assembled low wall, the vertical rod adopts a steel rail, there are a large number of old steel rail leasing companies on the market, the old steel rail has the characteristics of high structural strength, can effectively improve the overall strength of the low wall, and resist rockfall, and after the old steel rail is removed in the later period, it can be returned to the leasing company, the scheme has good engineering effect and remarkable economic value. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is an installation schematic diagram of the existing color steel fence;

[0029] Figure 2 It is an installation schematic diagram of the assembled low wall;

[0030] Figure 3 It is a structure schematic diagram of the assembled low wall as a temporary pass-through measure;

[0031] Figure 4 It is a top view of the assembled low wall;

[0032] Figure 5 It is an assembly schematic diagram of the assembled low wall set on the general road section slope;

[0033] Figure 6 It is a structure schematic diagram of the assembled low wall set on the general road section slope;

[0034] Figure 7 It is an assembly schematic diagram of the assembled low wall set on the super-high road section slope;

[0035] Figure 8 It is a structure schematic diagram of the assembled low wall set on the super-high road section slope;

[0036] Figure 9 Structure diagram of the protective net.

[0037] Marked in the figure: 1-first prefabricated block, 2-second prefabricated block, 3-third prefabricated block, 4-fourth prefabricated block, 5-vertical rod, 6-limiting groove, 7-reserved hole, 8-limiting protrusion, 9-cross rod, 10-protective net, 11-drainage ditch. DETAILED DESCRIPTION

[0038] The application will be described in detail below with reference to the drawings.

[0039] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0040] Example 1

[0041] As shown in the drawings, the assembled low wall of the present application comprises a plurality of first prefabricated blocks 1, a plurality of second prefabricated blocks 2, a plurality of third prefabricated blocks 3 and a plurality of fourth prefabricated blocks 4. The first prefabricated blocks 1, the second prefabricated blocks 2, the third prefabricated blocks 3 and the fourth prefabricated blocks 4 are prefabricated with reinforced concrete or plain concrete, for example, C20 concrete. Figures 2 to 9 As shown in the drawings, the top surface of the first prefabricated block 1, the second prefabricated block 2 and the third prefabricated block 3 is respectively provided with a limiting groove 6, and the bottom surface of the second prefabricated block 2, the third prefabricated block 3 and the fourth prefabricated block 4 is respectively provided with a limiting protrusion 8, as shown in the drawings.

[0042] Figure 5 Figure 7 As shown in the drawings, the limiting protrusion 8 is adapted to the limiting groove 6; in one specific embodiment, the limiting protrusion 8 and the limiting groove 6 are interchanged in position; in another specific embodiment, the limiting protrusion 8 and the limiting groove 6 are provided longitudinally. Figure 2 Figure 3 Figure 6 Figure 8 In one specific embodiment, as shown in the drawings, the cross section of the first prefabricated block 1 is wedge-shaped, and the cross section of the fourth prefabricated block 4 is trapezoidal, as shown in the drawings.

[0043] Figure 2 Figures 5 to 8 As shown in the drawings, the cross section of the second prefabricated block 2 is right trapezoidal, as shown in the drawings. Figure 2 Figure 3 Figure 5 Figure 6 Figure 2 Figure 3 Figure 7 and​​​​​​​​​​​​​Figure 8 As shown, the cross-section of the third precast block 3 is a right trapezoid. The second precast block 2 and the third precast block 3 have the same structural form, the only difference being that the height of the third precast block 3 is greater than the height of the second precast block 2. The second precast block 2 is used for general road sections, and the third precast block 3 is used for superelevation road sections.

[0044] like Figure 4 As shown, the first precast block 1, the second precast block 2, the third precast block 3 and the fourth precast block 4 are respectively provided with reserved holes 7 that run from top to bottom.

[0045] like Figure 2 and Figure 3 As shown, before slope excavation, the prefabricated low wall is placed between the slope toe and the road as a temporary traffic control measure to separate the construction area from the road. The prefabricated low wall is configured as at least one second prefabricated block 2 and at least one third prefabricated block 3 stacked together. Vertical rods 5 are inserted into the reserved holes 7 and the holes are sealed with concrete. The vertical rods 5 extend beyond the top surface of the reserved holes 7. The length of the vertical rods 5 is H2, ranging from 5m to 7m. Figure 5 and Figure 7 As shown, the calculated height of the first precast block 1 is H3, the calculated height of the second precast block 2 is H4, the calculated height of the third precast block 3 is H6, the calculated height of the fourth precast block 4 is H5, the height H1 of the prefabricated low wall is greater than or equal to 1.5m, and the thickness of the prefabricated low wall is greater than or equal to 1m; in a specific embodiment, such as Figure 2 and Figure 3 As shown, the prefabricated low wall is constructed by stacking one second prefabricated block 2 and two third prefabricated blocks 3, with the second prefabricated block 2 located at the bottom. H4 is 0.4m and H6 is 0.69m, resulting in a height H1 of 1.78m for the prefabricated low wall. The vertical rod 5 is made of old steel rails with a length H2 of 6.25m, meaning the old steel rails are inserted 1.78m into the prefabricated low wall and exposed for 4.47m. After assembly, the second prefabricated block 2 and the third prefabricated blocks 3 form a facade facing the road. The reserved holes 7 are sealed with mortar, which effectively fills the gap between the reserved holes 7 and the old steel rails, facilitating the subsequent removal of the old steel rails.

[0046] After the slope is excavated and shaped, the prefabricated low wall before the slope excavation is disassembled. Specifically, a hydraulic pipe puller is used to pull the vertical rod 5 out of the reserved hole 7, and the second prefabricated block 2 and the third prefabricated block 3 are separated into individual units.

[0047] like Figure 2As shown, the second prefabricated block 2 and the third prefabricated block 3 after separation are moved to the new slope foot by hoisting to construct a new assembly low wall, which is configured as Figure 5 and Figure 6 The first prefabricated block 1, the second prefabricated block 2 and the fourth prefabricated block 4 are sequentially stacked from bottom to top, or are configured as Figure 7 and Figure 8 The first prefabricated block 1, the third prefabricated block 3 and the fourth prefabricated block 4 are sequentially stacked from bottom to top, and the reserved hole 7 is poured to form a whole, wherein the assembly low wall formed by the first prefabricated block 1, the second prefabricated block 2 and the fourth prefabricated block 4 is arranged in a general road section, and the assembly low wall formed by the first prefabricated block 1, the third prefabricated block 3 and the fourth prefabricated block 4 is arranged in an extra-high road section; in a specific embodiment, as shown Figure 2 and Figure 6 The back of the first prefabricated block 1, the second prefabricated block 2 and the fourth prefabricated block 4 after assembly forms an inclined surface and is used to abut against the slope foot, as shown Figure 2 and Figure 8 The back of the first prefabricated block 1, the third prefabricated block 3 and the fourth prefabricated block 4 after assembly forms an inclined surface and is used to abut against the slope foot.

[0048] In a specific embodiment, the first prefabricated block 1, the second prefabricated block 2, the third prefabricated block 3 and the fourth prefabricated block 4 have the same length and are 3-4 m long; specifically as shown Figure 4 The length direction of the assembly low wall is sequentially spliced along the length direction of the road, Figure 4 The total length L of the example three-unit assembly low wall is 10 m, the length of a single section of the assembly low wall is 3.33 m, and the reserved hole 7 is located in the middle of the prefabricated block, so that the spacing of adjacent vertical rods 5 is also 3.33 m.

[0049] In a specific embodiment, as shown Figure 9 The protruding part of the vertical rod 5 is provided with a protective net 10, specifically, two horizontal rods 9 are arranged at the top and the middle of the exposed vertical rod 5 respectively, the spacing H8 between the two horizontal rods 9 is 2.22 m, the spacing H7 between the middle horizontal rod 9 and the top surface of the assembly low wall is 2.25 m, the horizontal rod 9 adopts an angle steel, the horizontal rod 9 and the vertical rod 5 can adopt welding or iron wire binding connection, the protective net 10 is connected on the horizontal rod 9 and the vertical rod 5, the protective net 10 adopts a reinforcing mesh, the diameter of the reinforcing steel used by the reinforcing mesh is 20 mm, and the mesh size of the reinforcing mesh is 0.25 m x 0.25 m.

[0050] In a specific embodiment, as shownFigure 2 As shown, after the first precast block 1 and the second precast block 2 are fixed against the slope foot, a drainage ditch 11 is provided on the front, or after the first precast block 1 and the third precast block 3 are fixed against the slope foot, a drainage ditch 11 is provided on the front.

[0051] This embodiment describes a prefabricated low wall that utilizes the existing low walls required in road cut sections. The low wall employs a prefabricated structure and, through the cooperation of the limiting groove 6 and the limiting protrusion 8, is initially used for temporary road clearance during slope excavation. The prefabricated structure is connected in series by inserting vertical rods 5 into the reserved holes 7 and pouring sealing holes, resulting in overall structural strength and effective resistance to falling rocks. On one hand, the vertical rods 5 connect the various prefabricated blocks of the prefabricated low wall; on the other hand, the vertical rods 5, together with the horizontal rods 9 and the protective netting 10, form a better temporary barrier, jointly defending against falling rocks and improving... The temporary low wall was dismantled into individual pieces after the slope excavation was completed. These pieces were then moved to the inside of the slope and reassembled into a permanent support wall for the cut section. This solution effectively addresses the current problem of temporary protection during cut excavation. By utilizing the permanent support structure for temporary road maintenance, the project saves on construction costs. Currently, there are numerous companies renting old steel rails. Utilizing the high structural strength of old steel rails can effectively improve the overall strength of the low wall and prevent rockfalls. After the old steel rails are dismantled, they can be returned to the rental company. This solution has excellent engineering results and significant economic value.

[0052] Example 2

[0053] like Figures 2 to 9 As shown, the method of using the prefabricated low wall as described in Embodiment 1 of the present invention includes the following steps:

[0054] S1. Before slope excavation, the prefabricated low wall described above is installed between the existing slope toe and the road to separate the construction area from the road, such as... Figure 2 and Figure 3 As shown, the prefabricated low wall segment is constructed by stacking one second prefabricated block 2 and two third prefabricated blocks 3, with the second prefabricated block 2 located at the bottom. Several prefabricated low wall segments are arranged along the length of the road, and the prefabricated low wall segments are connected sequentially.

[0055] S2. Insert the vertical rod 5 into the reserved hole 7 of the prefabricated low wall segment and seal the hole with mortar. The vertical rod 5 is made of old steel rail and extends out of the top surface of the reserved hole 7. Two horizontal rods 9 are connected to the vertical rod 5. The horizontal rods 9 and the vertical rod 5 are connected to the protective net 10. The horizontal rods 9 are made of angle steel and the protective net 10 is made of steel mesh. The prefabricated low wall forms a temporary passage control measure.

[0056] S3. After the slope is excavated and formed, the prefabricated low wall before the slope excavation is disassembled, and the vertical rod 5 is pulled out from the reserved hole 7 using a hydraulic pipe pulling machine, and the second prefabricated block 2 and the third prefabricated block 3 are separated into individual units.

[0057] S4, such as Figure 2 As shown, the second precast block 2 and the third precast block 3 are hoisted and moved. The new prefabricated low wall segment is formed by stacking the first precast block 1, the second precast block 2 and the fourth precast block 4 sequentially from bottom to top at the new slope toe, or by setting the first precast block 1, the third precast block 3 and the fourth precast block 4. Several prefabricated low wall segments are set along the length of the slope toe. The prefabricated low wall segments are connected sequentially, and the reserved holes 7 are sealed with mortar to form a whole. The prefabricated low wall forms a road cut section low wall.

[0058] This embodiment describes a method for using a prefabricated low wall. Utilizing the low wall already needed in the roadbed section, the wall employs a prefabricated structure. Through the cooperation of the limiting groove 6 and the limiting protrusion 8, the low wall is initially used for temporary road clearance during slope excavation. The prefabricated structure is connected in series by inserting the vertical rod 5 into the reserved hole 7 and pouring a seal, resulting in overall structural strength and effective resistance to falling rocks. On one hand, the vertical rod 5 connects the various prefabricated blocks of the prefabricated low wall; on the other hand, the vertical rod 5, together with the horizontal rod 9 and the protective net 10, forms a better temporary barrier, jointly preventing falling rocks. This improves the protective effect. After the slope excavation is completed, the temporary low wall will be disassembled into individual pieces, moved to the inside of the slope, and reassembled into a low wall for the cut section to achieve permanent support. This solution effectively solves the current problem of temporary protection during cut excavation. The low retaining structure with permanent support is used temporarily for road maintenance, saving on project costs. Currently, there are many old steel rail rental companies on the market. Utilizing the high structural strength of old steel rails can effectively improve the overall strength of the low wall and prevent rockfalls. After the old steel rails are dismantled, they can be returned to the rental company. This solution has good engineering results and significant economic value.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A prefabricated low wall, characterized in that, The precast block includes a first precast block (1), a second precast block (2), a third precast block (3), and a fourth precast block (4). The top surfaces of the first precast block (1), the second precast block (2), and the third precast block (3) are respectively provided with limiting grooves (6). The bottom surfaces of the second precast block (2), the third precast block (3), and the fourth precast block (4) are respectively provided with limiting protrusions (8). The limiting protrusions (8) can fit into the limiting grooves (6). The first precast block (1), the second precast block (2), the third precast block (3), and the fourth precast block (4) are respectively provided with reserved holes (7) that run from top to bottom. The height of the third precast block (3) is greater than the height of the second precast block (2). Before the slope excavation, the prefabricated low wall is configured as at least one second prefabricated block (2) and at least one third prefabricated block (3) stacked together. A vertical rod (5) is inserted into the reserved hole (7) and the hole is sealed by pouring. The height H1 of the prefabricated low wall is greater than or equal to 1.5m and the thickness of the prefabricated low wall is greater than or equal to 1m. After the slope is excavated and formed, the prefabricated low wall is moved to the slope foot and is arranged in a manner from bottom to top as the first prefabricated block (1), the second prefabricated block (2) and the fourth prefabricated block (4) are stacked in a manner from bottom to top, or as the first prefabricated block (1), the third prefabricated block (3) and the fourth prefabricated block (4) are stacked in a manner from bottom to top, and the reserved hole (7) is poured to form a whole.

2. The prefabricated low wall according to claim 1, characterized in that, The first precast block (1) has a wedge-shaped cross section, the second precast block (2) and the third precast block (3) both have right-angled trapezoidal cross sections, and the fourth precast block (4) has a trapezoidal cross section.

3. The prefabricated low wall according to claim 2, characterized in that, After the second precast block (2) and the third precast block (3) are assembled, the front side forms a facade and faces the road; after the first precast block (1), the second precast block (2) and the fourth precast block (4) are assembled, the back side forms a slope and is used to abut the toe of the slope; after the first precast block (1), the third precast block (3) and the fourth precast block (4) are assembled, the back side forms a slope and is used to abut the toe of the slope.

4. The prefabricated low wall according to claim 1, characterized in that, The first precast block (1), the second precast block (2), the third precast block (3) and the fourth precast block (4) are precast using reinforced concrete or plain concrete.

5. The prefabricated low wall according to claim 1, characterized in that, The positions of the limiting protrusion (8) and the limiting groove (6) are interchanged.

6. The prefabricated low wall according to claim 1, characterized in that, The vertical rod (5) extends out of the top surface of the reserved hole (7), and the length of the vertical rod (5) is 5m-7m.

7. The prefabricated low wall according to claim 6, characterized in that, The extended portion of the vertical rod (5) is fitted with a protective net (10).

8. The prefabricated low wall according to claim 1, characterized in that, The vertical rod (5) is made of steel rail.

9. The prefabricated low wall according to any one of claims 1-8, characterized in that, After the first precast block (1) and the second precast block (2) are fixed against the slope foot, a drainage ditch (11) is provided on the front side, or after the first precast block (1) and the third precast block (3) are fixed against the slope foot, a drainage ditch (11) is provided on the front side.

10. A method of using the prefabricated low wall as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Before the slope is excavated, the prefabricated low wall is set up between the existing slope toe and the road to separate the construction area and the road. The prefabricated low wall is made of at least one second prefabricated block (2) and at least one third prefabricated block (3) stacked together. The vertical rod (5) is inserted into the reserved hole (7) and the hole is sealed by pouring. The prefabricated low wall forms a temporary traffic control measure. S2. After the slope is excavated and shaped, the vertical rod (5) is pulled out from the reserved hole (7) using mechanical equipment, and the second precast block (2) and the third precast block (3) are hoisted and moved. The first precast block (1), the second precast block (2) and the fourth precast block (4) are stacked sequentially from bottom to top at the new slope toe, or the first precast block (1), the third precast block (3) and the fourth precast block (4) are set up. The reserved hole (7) is then poured to seal the hole and form a whole.

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