A honeycomb trapezoidal riprap frame for seawall structure and construction method

Abstract

The application provides a honeycomb trapezoidal riprap frame for a seawall structure and a construction method, and relates to the field of water conservancy projects. The honeycomb trapezoidal riprap frame is composed of a plurality of diamond modules, support columns and small ripraps to form a trapezoidal slope protection structure. The plurality of diamond modules are arranged in an alternating and staggered manner. The adjacent diamond modules are connected by the support columns. The diamond modules are filled with small ripraps. The diamond module includes a diamond block body. A semicircular groove in a semicircular shape is arranged on each of the four corners of the diamond block body. The semicircular grooves of the adjacent two diamond block bodies can completely wrap the support column. A clamping groove is vertically arranged at the middle position of the upper and lower surfaces of the four edges of the diamond block body. The honeycomb trapezoidal riprap frame limits the small ripraps to prevent the small ripraps from being washed away by the tidal current and causing piping and other risks. At the same time, the load stress of the small ripraps is dispersed in block form to each diamond module, which greatly improves the stability of the seawall and reduces the risk of dam collapse.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, specifically to a honeycomb trapezoidal riprap frame for seawall structures and its construction method. Background Technology

[0002] Silty soft soil foundations are widely distributed along the Chinese coast, characterized by low strength, low permeability, and high compressibility. Meanwhile, the Chinese coast is frequently affected by storm surges during typhoon season. Seawalls are crucial safety barriers protecting people's lives and property and are a key infrastructure investment area for the state. In the construction of seawalls in deep soft soil foundations and areas with strong winds and waves, traditional earth-rock seawalls employ a structure of "stone in front, soil in back," meaning the offshore side uses a riprap body with artificial block revetments, while the onshore side uses a mud-coated, airtight seal to prevent seepage.

[0003] Traditional riprap seawalls consist of a lower section constructed by piling small riprap into a slope, topped with a large precast concrete retaining structure. However, due to the lack of effective restraint on the small riprap, these seawalls are prone to instability and erosion under prolonged tidal erosion and unfavorable soft geological conditions, resulting in low stability. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a honeycomb trapezoidal riprap frame for seawall structures and a construction method thereof, thus solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a honeycomb trapezoidal riprap frame for seawall structures. The honeycomb trapezoidal riprap frame consists of several rhomboid modules, support columns, and small riprap forming a trapezoidal slope protection structure. Several rhomboid modules are arranged in a regular, alternating, and staggered manner. Adjacent rhomboid modules are connected and supported by support columns. The rhomboid modules are filled with small riprap. Each rhomboid module includes a rhomboid block body. Semicircular grooves are provided at the four corners of the rhomboid block body. The semicircular grooves of two adjacent rhomboid block bodies can completely enclose the support columns. Vertical slots are provided at the middle of the upper and lower surfaces of the four sides of the rhomboid block body. The width of the slots is greater than the width of the frame of the rhomboid block body. Drainage holes with a diameter smaller than that of the small riprap are provided on the four sides of the rhomboid block body.

[0006] Preferably, the support column includes a hollow tube column, and four through slots are vertically opened on the side wall of the tube column along its length direction. The four through slots correspond to two adjacent sides of two rhomboid blocks. A grouting channel is provided horizontally in each of the four sides of the rhomboid block body. The grouting inlet of the grouting channel is located on a semi-circular groove and faces the through slot. Cement is grouted into the tube column.

[0007] Preferably, the grouting channel extends to the slot end, and the four sides of the rhombus block body are provided with connecting holes. When the upper and lower rhombus block bodies are completely interlocked through the slots, the connecting holes on the two rhombus block bodies are connected to the grouting channels on the opposite rhombus block body.

[0008] Preferably, annular grooves are provided on both sides of the slot at the periphery of the grouting channel inlet. The diameter of the annular grooves is larger than that of the connecting hole, and a rubber ring protruding into the slot is embedded in the annular grooves.

[0009] A construction method for a honeycomb trapezoidal riprap scaffold used in seawall structures includes the following steps:

[0010] S1: Calculate the installation position of the support column based on the distance from the center point of the rhomboid block body to the center point of the semi-circular groove. Insert the support column into the soft soil foundation by driving piles at equal intervals in the horizontal and vertical directions. At the same time, align the through groove with the 45° angle between the horizontal and vertical lines. The length of the support column exposed from the soft soil foundation is determined by the shape of the honeycomb trapezoidal riprap frame and descends from the inside to the soft soil foundation surface.

[0011] S2: Arrange the bottom diamond-shaped modules. Adjacent diamond blocks are connected by semi-circular grooves. The two semi-circular grooves wrap the support columns at the corresponding positions. The support columns in the horizontal and vertical directions are arranged alternately at the center point of the diamond block body and the center point of the two semi-circular grooves.

[0012] S3: Arrange the second layer, reduce the number of rhombus modules by one or more in the vertical direction, and connect adjacent rhombus blocks through semi-circular grooves. Two semi-circular grooves wrap around the support column located at the center of the first layer of rhombus blocks, and the slots of the second layer of rhombus blocks are mortised and tenoned with the slots on the first layer of rhombus blocks.

[0013] S4: Arrange N+1 layers, with the same arrangement method as S3, until the rhomboid modules are stacked into a honeycomb trapezoidal riprap frame in the shape of a trapezoidal slope protection.

[0014] S5: Inject cement grout or fine sand concrete into each pipe column. The cement grout or fine sand concrete enters the grouting channel through the through groove and grouting inlet, and enters the connection hole from the other end of the grouting channel.

[0015] S6: After the cement grout or fine sand concrete has dried and hardened, small pebbles are filled into the body of the rhombus block until the uppermost rhombus block body is filled and overflows to cover the rhombus block body, forming a slope-like structure that is first horizontal and then inclined.

[0016] This invention provides a honeycomb trapezoidal riprap scaffold for seawall structures and a construction method thereof. It offers the following advantages:

[0017] 1. A honeycomb trapezoidal riprap frame and its construction method for seawall structures. The honeycomb trapezoidal riprap frame consists of several diamond-shaped modules stacked alternately and regularly. Adjacent diamond-shaped modules are connected and supported by support columns. Small riprap is filled into the diamond-shaped modules to form a new riprap sloping seawall. The honeycomb trapezoidal riprap frame restricts the small riprap, preventing it from being washed away by tidal currents and causing risks such as piping. At the same time, it distributes the load stress of the small riprap in a blocky manner to each diamond-shaped module, greatly improving the stability of the seawall and reducing the risk of dam failure.

[0018] 2. The honeycomb trapezoidal riprap frame and construction method used for seawall structures, by pouring cement grout or fine sand concrete from the pipe columns, connects the supporting columns and rhomboid modules, as well as the alternating rhomboid modules, into a whole. This greatly improves the overall resistance to small riprap loads and stability of the honeycomb trapezoidal riprap frame, making it less prone to collapse. Attached Figure Description

[0019] Figure 1 This is an isometric view of the rhomboid module of the present invention;

[0020] Figure 2 This is a schematic diagram of multiple diamond-shaped modules stacked vertically according to the present invention;

[0021] Figure 3 This is an isometric drawing of the support column of the present invention;

[0022] Figure 4 This is a schematic diagram of the support column installation arrangement of the present invention;

[0023] Figure 5 This is an isometric schematic diagram of the honeycomb trapezoidal stone-throwing frame of the present invention;

[0024] Figure 6 This is a top view schematic diagram of the honeycomb trapezoidal stone-throwing frame of the present invention;

[0025] Figure 7 This is a side view of the honeycomb trapezoidal stone-throwing frame of the present invention;

[0026] Figure 8 This is a partial side sectional view of the rhomboid module and the support column of the present invention.

[0027] Figure 9 This is a schematic diagram of the honeycomb trapezoidal stone-throwing frame installation according to the present invention.

[0028] In the diagram: 1. Honeycomb trapezoidal riprap frame, 2. Rhombus module, 3. Support column, 4. Embankment body, 5. Small riprap, 6. Large block slope protection structure, 7. Land side airtight earthwork, 8. Inner slope greening, 9. Soft soil foundation, 10. Pile foundation, 21. Rhombus block body, 22. Semi-circular groove, 23. Slot, 24. Seepage hole, 25. Grouting channel, 26. Grouting inlet, 27. Connection hole, 28. Ring groove, 31. Pipe column, 32. Through groove. Detailed Implementation

[0029] like Figure 9 As shown, the seawall structure typically includes the seawall body 4, a riprap slope, a large-block revetment structure 6, a land-side closed-loop soil 7, an inner slope greening 8, a composite foundation 9, and a pile foundation 10. Soft soil foundations 9 are set on both sides of the seawall body 4. The riprap slope is located on the soft soil foundation 9 on the outer side of the seawall body 4. The land-side closed-loop soil 7 is located on the soft soil foundation 9 on the inner side of the seawall body 4. The inner slope greening 8 is planted on the land-side closed-loop soil 7. The large-block revetment structure 6 is laid on the riprap slope. The seawall body 4 is a hollow reinforced concrete frame structure. The foundation of the seawall body 2 is a central pile foundation 10. The pile foundation 10 is used to transfer the load of the seawall body 4 to the deep part of the foundation soil. The structure of the seawall body 4 is not prone to settlement and does not generate additional stress on the soft soil foundations 9 on both sides. The counterpressure structure on both sides is small.

[0030] This application aims to improve the existing riprap embankment, which is constructed by piling up small riprap.

[0031] This invention provides a honeycomb trapezoidal riprap frame for seawall structures. For example... Figure 1-9 As shown, the honeycomb trapezoidal riprap frame 1 consists of several rhomboid modules 2, support columns 3, and small riprap forming a trapezoidal slope protection structure. The rhomboid modules 2 are arranged in a regular, alternating, and staggered pattern, with adjacent modules connected by support columns 3. Small riprap is filled within each rhomboid module 2. This forms a new riprap slope dike. The honeycomb trapezoidal riprap frame 1 restricts the small riprap 5, preventing them from being washed away by tidal currents and causing risks such as piping. Simultaneously, it distributes the load stress of the small riprap in a blocky manner across each rhomboid module 2, greatly improving the stability of the seawall and reducing the risk of dam failure.

[0032] like Figure 1 , 2 As shown in Figure 5, the rhombus module 2 includes a rhombus block body 21. The rhombus block body 21 is a rhombus structure with four identical sides. In this embodiment, the included angle between the four sides is 90°, which is a square structure. Of course, it can also be another rhombus structure that can achieve the same function. Semicircular grooves 22 are provided at each of the four corners of the rhombus block body 21. The inner diameter of the semicircular grooves 22 is slightly larger than the outer diameter of the support column 3. The semicircular grooves 22 of two adjacent rhombus block bodies 21 can completely enclose the support column 3. The support column 3 is used to reinforce and position the adjacent rhombus block bodies 21.

[0033] The four sides of the rhombus block body 21 are provided with vertical slots 23 at the middle of the top and bottom surfaces. The width of the slots 23 is slightly larger than the width of the frame of the rhombus block body 21, so that the frame of the rhombus block body 21 can fit into the slots 23.

[0034] like Figure 2As shown, the slots 23 on the upper and lower rhomboid block bodies 21 are connected to each other by mortise and tenon joints.

[0035] The four sides of the rhombus-shaped block body 21 are provided with drainage holes 24, which are smaller in diameter than small pebbles. The drainage holes 24 are used to drain seawater that flows into the rhombus-shaped block body 21.

[0036] like Figure 3-4 As shown, the support column 3 includes a hollow tube column 31. Four through slots 32 are vertically formed along the length of the tube column 31's side wall. The lengths of the tube column 31 and the through slots 32 are determined by the stacking height of the rhombus modules 2. The four through slots 32 correspond to two adjacent sides of two adjacent rhombus block bodies 21. Cement or fine sand concrete is grouted into the tube column 31. The through slots 32 are used to guide the cement grout or concrete poured into the tube column 31 onto the rhombus block bodies 21.

[0037] like Figure 1 As shown, grouting channels 25 are provided laterally on all four sides of the rhomboid block body 21. The two ends of the grouting channel 25 are respectively connected to the semi-circular groove 22 and the slot 23. The grouting inlet 26 of the grouting channel 25 is located on the semi-circular groove 22 and faces the through groove 32. The fine sand concrete injected from the pipe column 31 enters the grouting channel 25 through the through groove 32 and the grouting inlet 26.

[0038] The grouting channel 25 is located at one end of the inner wall of the slot 23, which is the grouting outlet. Connecting holes 27 are provided on all four sides of the rhombus block body 21. When the upper and lower rhombus block bodies 21 are fully interlocked through the slot 23, the connecting holes 27 on both rhombus block bodies 21 are connected to the corresponding grouting channels 25 on the opposite rhombus block body 21. The grouting outlet is used to guide concrete into the connecting holes 27.

[0039] To prevent concrete from seeping out of the grouting outlet, annular grooves 28 are provided on both sides of the groove 23 around the entrance of the grouting channel 25. The diameter of the annular grooves 28 is larger than that of the connecting hole 27, and rubber rings protruding into the groove 23 are embedded in the annular grooves 28. When the upper and lower rhomboid block bodies 21 are engaged with each other through the groove 23, the rubber rings on the outside of the groove 23 press against the outside of the connecting hole 27 of the corresponding rhomboid block body 21 to limit concrete seepage.

[0040] By pouring cement grout or fine sand concrete onto the column 31, the support column 3 and the rhombus module 2, as well as the alternating rhombus modules 2, are all cast and connected as a whole, which greatly improves the overall resistance to small riprap loads and stability of the honeycomb trapezoidal riprap frame 1, making it less prone to collapse.

[0041] A construction method for a honeycomb trapezoidal riprap scaffold used in seawall structures includes the following steps:

[0042] S1: As Figure 4 As shown, based on the distance from the center point of the rhomboid block body 21 to the center point of the semi-circular groove 22, the installation position of the support column 3 is calculated. The support column 3 is inserted into the soft soil foundation by driving piles at equal intervals in the horizontal and vertical directions. At the same time, the through groove 32 is aligned with the 45° angle between the horizontal and vertical lines. The length of the support column 3 exposed above the soft soil foundation is lowered from the inside to the soft soil foundation surface according to the shape of the honeycomb trapezoidal riprap frame, so that it forms a trapezoidal shape.

[0043] S2: Arrange the bottom rhombus modules 2. Adjacent rhombus block bodies 21 are connected by semi-circular grooves 22. The two semi-circular grooves 22 wrap around the corresponding support columns 3. The support columns 3 are arranged alternately with the center point of the rhombus block body 21 and the center point of the two semi-circular grooves 22 in the horizontal and vertical directions. That is to say, the semi-circular grooves 22 on the bottom rhombus modules 2 wrap around and connect the support columns 3 in the horizontal and vertical directions. Figure 6 The columns are arranged in even-numbered columns, such as the second, fourth, and sixth columns.

[0044] S3: Arrange the second layer, reducing the number of rhombus modules 2 by one or more in the vertical direction. Adjacent rhombus block bodies 21 are connected by semi-circular grooves 22. Two semi-circular grooves 22 wrap around the support column 3 located at the center of the first layer of rhombus block bodies 21. That is to say, the semi-circular grooves 22 on the second layer of rhombus modules 2 wrap around and connect as follows: Figure 6 The blocks are arranged in odd-numbered columns, such as the first, third, and fifth. The slots 23 on the second-layer rhomboid block body 21 are mortised and tenon-fitted with the slots 23 on the first-layer rhomboid block body 21. Figure 7 As shown.

[0045] S4: Arrange N+1 layers, following the same pattern as S3. It's worth noting that in odd-numbered layers, the rhombus-shaped modules 2 connect to the even-numbered columns of support columns 3, and in even-numbered layers, they connect to the odd-numbered columns of support columns 3. Continue this process until the rhombus-shaped modules 2 are stacked to form a honeycomb trapezoidal riprap frame 1 in the shape of a trapezoidal slope protection structure. Figure 5 and Figure 7 As shown.

[0046] S5: Inject cement grout or fine sand concrete into each pipe column 31. The cement grout or fine sand concrete enters the grouting channel 25 through the through groove 32 and the grouting inlet 26, and then enters the connecting hole 27 from the other end of the grouting channel 25. Figure 8 As shown.

[0047] S6: As Figure 9As shown, after the cement slurry or fine sand concrete has hardened, small pebbles 5 are filled into the diamond-shaped block body 21 until the top layer of diamond-shaped block body 21 is full and overflows to cover the diamond-shaped block body 21, forming a slope-like structure that is first horizontal and then inclined. The overflowing small pebbles 5 can protect the diamond-shaped block body 21. A layer of precast reinforced concrete large-block slope protection structure 6 is then laid on the subsequent layer of small pebbles 5.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A honeycomb trapezoidal riprap frame for seawall structures, characterized in that: The honeycomb trapezoidal riprap frame (1) is composed of several rhombus modules (2), support columns (3), and small riprap forming a trapezoidal slope protection structure. Several rhombus modules (2) are stacked alternately and regularly, and adjacent rhombus modules (2) are connected by support columns (3). The rhombus modules (2) are filled with small riprap. The rhombus module (2) includes a rhombus block body (21). Semicircular grooves (22) are provided at the four corners of the rhombus block body (21). The semicircular grooves (22) of two adjacent rhombus block bodies (21) can completely cover the support columns (3). The upper and lower sides of the four sides of the rhombus block body (21) are vertically provided with slots (23). The width of the slots (23) is greater than the width of the frame of the rhombus block body (21). The four sides of the rhombus block body (21) are provided with seepage holes (24) with a diameter smaller than that of the small riprap. The support column (3) includes a hollow tube column (31). Four through slots (32) are vertically opened on the side wall of the tube column (31) along its length. The four through slots (32) correspond to two sides of two adjacent rhomboid block bodies (21). A grouting channel (25) is provided horizontally in each of the four sides of the rhomboid block body (21). The grouting inlet (26) of the grouting channel (25) is located on the semi-circular groove (22) and faces the through slot. The groove (32) is filled with cement grouting in the column (31); the grouting channel (25) extends to the end of the slot (23); the four sides of the rhomboid block body (21) are provided with connecting holes (27); when the upper and lower rhomboid block bodies (21) are completely interlocked through the slot (23), the connecting holes (27) on the two rhomboid block bodies (21) are connected to the grouting channels (25) on the opposite rhomboid block body (21).

2. A honeycomb trapezoidal riprap scaffold for seawall structures according to claim 1, characterized in that: On both sides of the slot (23) located outside the grouting channel (25) entrance, there are ring grooves (28). The diameter of the ring grooves (28) is larger than that of the connecting hole (27). A rubber ring protruding into the slot (23) is embedded in the ring grooves (28).

3. A construction method for a honeycomb trapezoidal riprap frame used in seawall structures, characterized in that, The honeycomb trapezoidal stone-throwing frame according to any one of claims 1-2 includes the following steps: S1: Based on the distance from the center point of the rhomboid block body (21) to the center point of the semi-circular groove (22), calculate the installation position of the support column (3), insert it into the soft soil foundation by driving piles at equal intervals in the horizontal and vertical directions, and align the through groove (32) with the 45° angle between the horizontal and vertical lines. The length of the support column (3) exposed from the soft soil foundation is lowered from the inside to the soft soil foundation beach according to the shape of the honeycomb trapezoidal riprap frame. S2: Arrange the bottom diamond-shaped modules (2), and connect the adjacent diamond-shaped blocks (21) through semi-circular grooves (22). The two semi-circular grooves (22) wrap the support columns (3) at the corresponding positions. The support columns (3) in the horizontal and vertical directions are the center point of the diamond-shaped block (21) and the center point of the two semi-circular grooves (22) are arranged alternately. S3: Arrange the second layer, reduce the number of rhombus modules (2) by one or more in the longitudinal direction, connect the adjacent rhombus block bodies (21) through semi-circular grooves (22), wrap the two semi-circular grooves (22) around the support column (3) located at the center of the first layer rhombus block body (21), and mortise and tenon engage the slots (23) of the second layer rhombus block body (21) with the slots (23) on the first layer rhombus block body (21); S4: Arrange N+1 layers, the arrangement method is the same as S3, until the rhomboid module (2) is stacked to the honeycomb trapezoidal riprap frame (1) of the trapezoidal slope protection shape. S5: Inject cement grout or fine sand concrete into each pipe column (31). The cement grout or fine sand concrete enters the grouting channel (25) through the through groove (32) and grouting inlet (26), and enters the connecting hole (27) from the other end of the grouting channel (25). S6: After the cement slurry or fine sand concrete has dried and hardened, fill the diamond block body (21) with small pebbles until the uppermost diamond block body (21) is filled and overflows to cover the diamond block body (21) to form a slope structure that is first horizontal and then inclined.

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