Construction method of a dike protection structure

Abstract

The application discloses a construction method of a dike protection structure, which comprises the following steps: (a) excavating a foundation pit to a design height at a slope angle of a dike slope; (b) lowering a positioning support; (c) lowering a prefabricated pile; (d) grouting and filling soil; and (e) planting. The application has the advantages of simple process, low construction difficulty, high efficiency, flexible arrangement of a construction site, easy control of construction quality, formation of a reliable scour-resistant structure, effective resistance to water flow scouring and prevention of water and soil loss on a slope surface.

Description

Technical Field

[0001] This invention belongs to the field of slope protection structure construction technology, and particularly relates to a construction method for embankment protection structures. Background Technology

[0002] Embankments play a vital role in flood control, but preventing soil erosion on embankment slopes is one of the most challenging problems to address today. Existing embankment protection structures have the following drawbacks: laying protective netting on slopes and planting turf, or constructing retaining walls at slope corners using piled stones, requires significant construction effort, has poor stability, and is prone to rockfalls, posing a major safety hazard. Alternatively, pouring concrete retaining walls at slope corners presents problems such as long construction periods, high costs, time and labor demands, and stringent operational requirements. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned technical problems existing in the prior art and to provide a construction method for embankment protection structures. The method is simple, easy to construct, efficient, and allows for flexible site layout. The construction quality is easy to control, forming a reliable erosion-resistant structure that effectively resists water erosion and prevents soil and water loss on the slope.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A construction method for a embankment protection structure, characterized by comprising the following steps:

[0006] (a) Excavate a foundation pit at the slope angle of the embankment to the design height;

[0007] (b) Lowering the positioning bracket:

[0008] ① Mark the center line on the sidewalls and bottom of the excavation pit;

[0009] ② Assemble the positioning bracket, pass the protective sleeve through the mounting hole of the positioning bracket, and place the protective sleeve on the positioning bracket through the end ring to obtain the combination of the protective sleeve and the positioning bracket. The bottom surface of the positioning bracket is 2-5cm higher than the bottom of the protective sleeve.

[0010] ③ Place the assemblies one by one into the pit along the center line of the bottom of the pit, with adjacent assemblies close to each other, to complete the arrangement of the bottom layer of assemblies;

[0011] ④ When arranging the upper layer of the assembly, the bottom end of the protective sleeve of the upper layer assembly is embedded into the positioning groove at the top of the protective sleeve of the lower layer assembly, so that the upper layer assembly is positioned and installed on the lower layer assembly one by one, thus completing the layer-by-layer arrangement of the assemblies.

[0012] (c) Lowering the precast piles:

[0013] ① Insert the lower pile into the slots on both sides of the positioning bracket, so that the lower pile is against the positioning bracket, and complete the arrangement of the lower pile in the foundation pit.

[0014] ② Insert the upper pile body into the slots on both sides of the positioning bracket, so that the protrusion at the bottom of the upper pile body is embedded into the fixing groove at the top of the lower pile body, thus completing the connection between the upper and lower pile bodies and obtaining the precast pile.

[0015] (d) Grouting and backfilling:

[0016] ① Inject pre-prepared cement grout into the gap between the precast pile and the positioning bracket and the foundation pit, so that the cement grout fills the gap and smooths out the cement grout that overflows from the surface of the precast pile.

[0017] ② The soil excavated from the foundation pit is used as backfill soil and filled into the central holes of the precast piles and the casing, so that the soil fills the central holes of the precast piles and the casing, and the soil is compacted.

[0018] (e) Planting:

[0019] ① Plant plants in the soil inside the central hole of the precast pile and in the soil inside the central hole of the uppermost casing.

[0020] ② A three-dimensional vegetation net is laid from the top of the embankment slope to the bottom of the slope, and then a soil cover layer is laid on the three-dimensional vegetation net, and plants are planted on the soil cover layer.

[0021] Furthermore, step (d) ① also includes the following steps: First, insert the grouting pipe into the grouting channel of the upper pile body, then add pre-prepared cement grout into the grouting pipe until the cement grout overflows from the upper pile body, and then pull out the grouting pipe. The cement grout flows downward through the grouting channel of the upper pile body into the fixed groove of the lower pile body, and then flows downward through the fixed channel of the lower pile body, gradually filling the gap between the bottom of the precast pile and the lowest layer of the assembly. After the cement grout solidifies, it is solidified with the precast pile and the lowest layer of the assembly, which improves the stability of the precast pile arrangement and prevents the precast pile from tilting or shifting freely.

[0022] Furthermore, the assembly method of the positioning bracket in step (b) ② is as follows: the threaded ends of both ends of the support screw are screwed into the screw holes of the two support plates, so that one support screw connects two support plates at the same time. The operation is simple, the construction is quick, and it can be used immediately after installation, which is convenient for flexible arrangement on the construction site.

[0023] Furthermore, in step (d), during backfilling, the soil is compacted after every 20-25cm of backfill to increase the density of the backfill, reduce the impact of soil settlement, and prevent the foundation pit from collapsing.

[0024] Furthermore, in step (c), the precast pile includes an upper pile body and a lower pile body. The lower pile body is provided with a filling groove, and the upper pile body is provided with a through hole corresponding to the filling groove. The top of the lower pile body is provided with a fixing groove, and the bottom of the upper pile body is provided with a protrusion corresponding to the fixing groove. This facilitates the quick connection between the upper and lower pile bodies, reduces construction difficulty, and facilitates rapid layout on the construction site. The precast pile adopts a split design, is lightweight, and is easy to manufacture separately and hoist into the pit, reducing manufacturing costs and hoisting machinery costs. Quality defects found on the construction site can be replaced in a timely manner, making it flexible and convenient.

[0025] Furthermore, the fixed groove is provided with a fixed channel communicating with the bottom of the lower pile body, and the top of the upper pile body is provided with a grouting channel communicating with the protrusion. The thickness of the protrusion is less than the depth of the fixed groove. After the upper and lower pile bodies are connected, a cavity is formed between the protrusion and the fixed groove. During the grouting process, the fixed channel, the cavity, and the grouting channel are filled with cement grout, which ensures the bonding strength of the cement grout. The upper and lower pile bodies are connected into one body by the solidified cement grout, and the structure is stable and reliable.

[0026] Furthermore, in step (b) ②, the positioning bracket includes a support plate and a support screw. The support screw is screwed between two support plates. The support plate is provided with mounting holes corresponding to the protective sleeve. The top of the protective sleeve is provided with an end ring. The cross-sectional diameter of the end ring is larger than the cross-sectional diameter of the mounting hole. The end ring is provided with a positioning groove corresponding to the bottom end of the protective sleeve.

[0027] Furthermore, the support plate has slots on both sides, which correspond to the precast piles. The precast piles are placed into the slots to achieve rapid positioning of the precast piles in the foundation pit, reducing the difficulty of construction. The positioning bracket supports the precast piles to prevent them from leaning to one side, ensuring the verticality of the precast piles and eliminating the need for manual correction and support operations, saving time and effort.

[0028] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0029] The precast piles adopt a split design, which is lightweight and easy to manufacture separately and hoist into the pit, reducing manufacturing and hoisting machinery costs. Quality defects found on the construction site can be replaced in a timely manner, which is flexible and convenient. The upper and lower pile bodies can be quickly connected, which reduces the difficulty of construction and facilitates rapid layout on the construction site.

[0030] The casing and positioning brackets are assembled into a combined unit, which can be positioned and connected vertically. This reduces construction difficulty, increases efficiency, and saves labor. The upper and lower components do not move relative to each other and restrain each other, forming a stable stack with variable height to suit foundation pits of different depths. Precast piles are placed on both sides of the combined unit, and the positioning brackets support the precast piles to prevent them from tilting and ensure their verticality. This eliminates the need for manual straightening and support operations, saving time and labor.

[0031] During the grouting process, cement grout flows downward through the grouting channel of the upper pile body into the fixed groove of the lower pile body, and then flows out downward through the fixed channel of the lower pile body, gradually filling the gap between the bottom of the precast pile and the lowest layer of the assembly. After the cement grout solidifies, it is integrated with the precast pile and the lowest layer of the assembly, improving the stability of the precast pile arrangement and preventing the precast pile from tilting or shifting freely. Pre-prepared cement grout is injected into the gap between the precast pile, the positioning support, and the foundation pit, filling the gap. After the cement grout solidifies, it integrates the precast pile with the positioning support and the foundation pit, forming a stable structure that effectively resists water erosion and prevents soil erosion on the slope. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] Figure 1 This is a construction diagram of the present invention;

[0034] Figure 2 This is a schematic diagram of the connection between the positioning bracket and the precast pile in this invention;

[0035] Figure 3 for Figure 2 The main view;

[0036] Figure 4 This is a schematic diagram of the precast pile structure in this invention;

[0037] Figure 5 This is a schematic diagram of the lower pile body in this invention;

[0038] Figure 6 This is a schematic diagram of the upper pile body in this invention;

[0039] Figure 7 This is a schematic diagram of the connection between the positioning bracket and the protective sleeve in this invention;

[0040] Figure 8 This is a schematic diagram of the connection between the positioning bracket and the protective sleeve in this invention;

[0041] Figure 9 This is a schematic diagram of the positioning bracket in this invention.

[0042] In the diagram: 1-Positioning bracket; 2-Supporting screw; 3-Supporting plate; 4-Casing; 5-Mounting hole; 6-End ring; 7-Positioning groove; 8-Support rod; 9-Bayonet; 10-Precast pile; 11-Upper pile body; 12-Lower pile body; 13-Filling groove; 14-Through hole; 15-Fixing groove; 16-Protrusion; 17-Fixing channel; 18-Grouting channel; 19-Three-dimensional vegetation net. Detailed Implementation

[0043] A construction method for a levee protection structure includes the following steps:

[0044] (a) Excavate a foundation pit at the slope angle of the embankment to the design height according to the construction design drawings;

[0045] (b) Lowering the positioning bracket 1:

[0046] ① Mark the center line on the sidewalls and bottom of the excavation pit;

[0047] ② The positioning bracket 1 is assembled. The assembly method is as follows: the threaded ends of the support screw 2 are screwed to the screw holes of the two support plates 3, so that one support screw 2 can connect to two support plates 3 at the same time. The operation is simple, the construction is quick, and it can be used immediately after installation, which is convenient for flexible arrangement on the construction site.

[0048] like Figures 7 to 9 As shown, the positioning bracket 1 includes a support plate 3 and a support screw 2. The support screw 2 is screwed between two support plates 3. The support plate 3 is provided with mounting holes 5 corresponding to the protective cylinder 4. The top end of the protective cylinder 4 is provided with an end ring 6. The cross-sectional diameter of the end ring 6 is larger than the cross-sectional diameter of the mounting hole 5. The end ring 6 is provided with a positioning groove 7 corresponding to the bottom end of the protective cylinder 4.

[0049] Two support rods 8 are provided on both sides of the support plate 3. The two support rods 8 and the support plate 3 form a slot 9. The slot 9 corresponds to the precast pile 10. The precast pile 10 is placed into the slot 9, so that the precast pile 10 can be quickly positioned in the foundation pit, reducing the construction difficulty.

[0050] The casing 4 is passed through the mounting hole 5 of the positioning bracket 1. The end ring 6 cannot pass through the mounting hole 5, so that the casing 4 is placed on the positioning bracket 1 through the end ring 6, thus obtaining the combination of the casing 4 and the positioning bracket 1. The bottom surface of the positioning bracket 1 is 2-5cm higher than the bottom of the casing 4. It is easy to assemble, can be used immediately after installation, and can be flexibly arranged on the construction site, which is flexible and convenient.

[0051] ③ Place the assemblies one by one into the pit along the center line of the bottom surface of the pit, aligning the center line of the bottom surface of the assemblies with the center line of the bottom surface of the pit, and place adjacent assemblies close to each other to complete the arrangement of the bottom layer of assemblies.

[0052] ④ When arranging the upper layer assembly, the bottom end of the protective sleeve 4 of the upper layer assembly is embedded into the positioning groove 7 at the top of the protective sleeve 4 of the lower layer assembly, so that the upper layer assembly is positioned and installed on the lower layer assembly one by one, thus completing the layer-by-layer arrangement of the assemblies.

[0053] Positioning and docking make construction easy, efficient, labor-saving, and convenient. The upper and lower components do not move relative to each other and restrain each other to form a stable stack. The height is variable to suit foundation pits of different depths.

[0054] (c) Lowering precast pile 10:

[0055] like Figures 4 to 6 As shown, the precast pile 10 includes an upper pile body 11 and a lower pile body 12. The lower pile body 12 is provided with a filling groove 13. The upper pile body 11 is provided with a through hole 14 corresponding to the filling groove 13. The top of the lower pile body 12 is provided with a fixing groove 15. The bottom of the upper pile body 11 is provided with a protrusion 16 corresponding to the fixing groove 15. The thickness of the protrusion 16 is less than the depth of the fixing groove 15. The fixing groove 15 is provided with a fixing channel 17 communicating with the bottom of the lower pile body 12. The top of the upper pile body 11 is provided with a grouting channel 18 communicating with the protrusion 16.

[0056] After the upper pile body 11 and the lower pile body 12 are connected, a cavity is formed between the protrusion 16 and the fixing groove 15. During the grouting process, the fixing channel 17, the cavity, and the grouting channel 18 are filled with cement grout, which ensures the bonding strength of the cement grout. The upper pile body 11 and the lower pile body 12 are connected into one piece by the solidified cement grout, and the structure is stable and reliable.

[0057] ① Insert the lower pile 12 into the slots 9 on both sides of the positioning bracket 1, so that the lower pile 12 is against the positioning bracket 1, and complete the arrangement of the lower pile 12 in the foundation pit.

[0058] ② Insert the upper pile body 11 into the slots 9 on both sides of the positioning bracket 1, so that the protrusion 16 at the bottom of the upper pile body 11 is embedded into the fixing groove 15 at the top of the lower pile body 12, thus completing the docking of the upper pile body 11 and the lower pile body 12, and obtaining the precast pile 10.

[0059] The precast pile 10 adopts a split design, which is lightweight and easy to manufacture separately and hoist into the pit, reducing manufacturing costs and hoisting machinery costs. Quality defects found on the construction site can be replaced in a timely manner, which is flexible and convenient. The upper pile body 11 and the lower pile body 12 can be quickly connected, which reduces the difficulty of construction and facilitates rapid layout on the construction site.

[0060] like Figure 2 , Figure 3 As shown, the precast piles 10 are arranged on both sides of the assembly, and the positioning brackets 1 support the precast piles 10 to prevent them from tilting and ensure their verticality. This eliminates the need for manual correction and support, saving time and effort.

[0061] (d) Grouting and backfilling:

[0062] ① First, insert the grouting pipe into the grouting channel 18 of the upper pile body 11, then add the pre-prepared cement grout into the grouting pipe until the cement grout overflows from the upper pile body 11, and then pull out the grouting pipe.

[0063] Cement grout flows downward through the grouting channel 18 of the upper pile body 11 into the fixed groove 15 of the lower pile body 12, and then flows out downward through the fixed channel 17 of the lower pile body 12, gradually filling the gap between the bottom of the precast pile 10 and the lowest layer assembly. After the cement grout solidifies, it is solidified with the precast pile 10 and the lowest layer assembly, which improves the arrangement stability of the precast pile 10 and prevents the precast pile 10 from tilting or shifting freely.

[0064] Inject pre-prepared cement grout into the gap between the precast pile 10, the positioning bracket 1, and the foundation pit, so that the cement grout fills the gap and smooths out the cement grout that overflows from the surface of the precast pile 10.

[0065] After the cement grout solidifies, the precast pile 10 is integrated with the positioning bracket 1 and the foundation pit to form a stable structure that effectively resists water erosion and prevents soil erosion on the slope.

[0066] ② The excavated soil from the foundation pit is used as backfill and is filled into the central holes of the precast piles 10 and the casing 4 respectively, so that the soil fills the central holes of the precast piles 10 and the casing 4. After each 20-25cm layer of soil is backfilled, it is compacted to improve the density of the backfill soil, reduce the impact of soil settlement, and prevent the foundation pit from collapsing.

[0067] (e) Planting:

[0068] ① Planting plants in the soil inside the central hole of the precast pile 10 and the soil inside the central hole of the uppermost casing 4 serves two purposes: greening and reducing the erosion of the slope by water flow.

[0069] ②For example Figure 1 As shown, a three-dimensional vegetation net 19 is laid from the top of the embankment slope to the bottom of the slope, and then a soil covering layer is laid on the three-dimensional vegetation net 19, and plants are planted on the soil covering layer.

[0070] The three-dimensional vegetation net 19 can effectively prevent the slope from being eroded by water flow. The soil layer presses down on the three-dimensional vegetation net 19, making the three-dimensional vegetation net 19 more evenly laid and forming a dense vegetation cover on the slope, effectively inhibiting the erosion of the slope by rainwater runoff.

[0071] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A construction method for a embankment protection structure, characterized in that... Includes the following steps: (a) Excavate a foundation pit at the toe of the embankment slope to the design height; (b) Lowering the positioning bracket: ① Mark the center line on the sidewalls and bottom of the excavation pit; ② Assemble the positioning bracket, pass the protective sleeve through the mounting hole of the positioning bracket, and place the protective sleeve on the positioning bracket through the end ring to obtain the combination of the protective sleeve and the positioning bracket. The bottom surface of the positioning bracket is 2-5cm higher than the bottom of the protective sleeve. The positioning bracket includes a support plate and a support screw. The support screw is screwed between two support plates. The support plate is provided with a mounting hole corresponding to the protective cylinder. The top end of the protective cylinder is provided with an end ring. The cross-sectional diameter of the end ring is larger than the cross-sectional diameter of the mounting hole. The end ring is provided with a positioning groove corresponding to the bottom end of the protective cylinder. Both sides of the support plate are provided with slots, which correspond to the precast piles; ③ Place the assemblies one by one into the pit along the center line of the bottom of the pit, with adjacent assemblies close to each other, to complete the arrangement of the bottom layer of assemblies; ④ When arranging the upper layer of the assembly, the bottom end of the protective sleeve of the upper layer assembly is embedded into the positioning groove at the top of the protective sleeve of the lower layer assembly, so that the upper layer assembly is positioned and installed on the lower layer assembly one by one, thus completing the layer-by-layer arrangement of the assemblies. (c) Lowering the precast piles: ① Insert the lower pile into the slots on both sides of the positioning bracket, so that the lower pile is against the positioning bracket, and complete the arrangement of the lower pile in the foundation pit. ② Insert the upper pile body into the slots on both sides of the positioning bracket, so that the protrusion at the bottom of the upper pile body is embedded into the fixing groove at the top of the lower pile body, thus completing the connection between the upper and lower pile bodies and obtaining the precast pile. (d) Grouting and backfilling: ① Inject pre-prepared cement grout into the gap between the precast pile and the positioning bracket, and into the gap between the precast pile and the foundation pit, so that the cement grout fills the gap and smooths out the cement grout that overflows onto the surface of the precast pile. ② The soil excavated from the foundation pit is used as backfill soil and filled into the central holes of the precast piles and the casing, so that the soil fills the central holes of the precast piles and the casing, and the soil is compacted. (e) Planting: ① Plant plants in the soil inside the central hole of the precast pile and in the soil inside the central hole of the uppermost casing. ② A three-dimensional vegetation net is laid from the top of the embankment slope to the bottom of the slope, and then a soil cover layer is laid on the three-dimensional vegetation net, and plants are planted on the soil cover layer.

2. The construction method for a embankment protection structure according to claim 1, characterized in that: Step (d) ① also includes the following steps: first insert the grouting pipe into the grouting channel of the upper pile body, then add the pre-prepared cement slurry into the grouting pipe until the cement slurry overflows from the upper pile body, and then pull out the grouting pipe.

3. The construction method for a embankment protection structure according to claim 1, characterized in that: The assembly method of the positioning bracket in step (b) ② is as follows: the threaded ends of both ends of the support screw are screwed into the screw holes of the two support plates, so that one support screw connects to two support plates at the same time.

4. The construction method of a embankment protection structure according to claim 1, characterized in that: In step (d), when backfilling, compact the soil after each 20-25cm layer.

5. The construction method for a embankment protection structure according to claim 1, characterized in that: The precast pile in step (c) includes an upper pile body and a lower pile body. The lower pile body is provided with a filling groove, the upper pile body is provided with a through hole corresponding to the filling groove, the top of the lower pile body is provided with a fixing groove, and the bottom of the upper pile body is provided with a protrusion corresponding to the fixing groove.

6. The construction method of a embankment protection structure according to claim 5, characterized in that: The fixed groove is provided with a fixed channel communicating with the bottom of the lower pile body, and the top of the upper pile body is provided with a grouting channel communicating with the protrusion. The thickness of the protrusion is less than the depth of the fixed groove.

Images