CN215105047U - Prefabricated concrete hollow square wall type revetment - Google Patents

Prefabricated concrete hollow square wall type revetment Download PDF

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CN215105047U
CN215105047U CN202121201829.XU CN202121201829U CN215105047U CN 215105047 U CN215105047 U CN 215105047U CN 202121201829 U CN202121201829 U CN 202121201829U CN 215105047 U CN215105047 U CN 215105047U
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river
hollow square
concrete
concrete hollow
prefabricated concrete
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温州
郭佳乐
王波
曹振宇
曹越
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Heilongjiang Prov Investigation Design And Research Institute Of Water Conservancy And Hydropower
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Abstract

The utility model relates to a hollow square wall formula shore protection of prefabricated concrete, include: setting foundation bed riprap at the bottom of a removed river slope, setting prefabricated concrete hollow square boxes with internal backfill blocks stones on the foundation bed riprap side by side along a river bank line, setting concrete breast wall cover plates forming the river bank line on each prefabricated concrete hollow square box, connecting the side of the river bank of the breast wall cover plates with a cast-in-place concrete pavement, connecting the bottom feet of the river surface of the prefabricated concrete hollow square boxes with a gabion bottom guard, and setting a water stabilization layer below the cast-in-place concrete pavement on the side of the river bank and backfilling a sand-soil material. The utility model discloses a hollow square wall formula shore protection of prefabricated concrete can enough strengthen the protecting effect, has the advantage in the aspect of picking the flow, reduces near the rivers velocity of low reaches island head simultaneously, has strengthened ground bearing capacity, and the shore protection type construction is simple and convenient, can be under water the construction, and the wall body is prefabricated, can increase the island area after implementing, prevents soil erosion and water loss, combines with the view on the island, can combine municipal works, becomes the place of people's amusement and recreation.

Description

Prefabricated concrete hollow square wall type revetment
Technical Field
The utility model relates to a prefabricated concrete hollow square wall type revetment, which is a hydraulic facility and is a revetment of a river bank, a water channel or other similar projects.
Background
The conventional slope type revetment has a small influence on water flow, and particularly cannot play a role in stabilizing the main flow of the river branch island on one side of the main flow. Meanwhile, as the slope type bank protection is designed to maintain the original river bank appearance, the slope type bank protection is relatively difficult to be jointed with a river bank wharf, and the wharf needs to be specially designed. The conventional slope type revetment has relatively weak water scouring resistance, and needs frequent maintenance to keep the integrity of the revetment especially on one side of a main channel. Therefore, how to improve the anti-scouring capability of the revetment and simultaneously solve the problems of docking and main stream stabilization is a problem to be solved.
Disclosure of Invention
In order to overcome the problems of the prior art, the utility model provides a prefabricated concrete hollow square wall type revetment. The revetment adopts the prefabricated reinforced concrete hollow square wall close to the wharf, improves the water flow impact resistance of the revetment, and solves the problems of connection with the wharf and water flow stabilization.
The purpose of the utility model is realized like this: a prefabricated concrete hollow square wall type revetment, comprising: the method comprises the steps of setting foundation bed riprap at the bottom of a removed river slope, setting prefabricated concrete hollow square boxes with inner backfilling block stones on the foundation bed riprap side by side along a river bank line, setting concrete breast wall cover plates forming the river bank line on each prefabricated concrete hollow square box, enabling the height of the combined prefabricated concrete hollow square boxes and the concrete breast wall cover plates to be larger than the flood level of a river, connecting one side of the river bank of the breast wall cover plates with a cast-in-place concrete pavement, connecting bottom feet on one side of the river bank of the prefabricated concrete hollow square boxes with a gabion bottom guard, arranging a water stabilizing layer below the cast-in-place concrete pavement on one side of the river bank, and backfilling a sand stone material.
Furthermore, the shape of the longitudinal section of the foundation bed riprap is a trapezoid with a large upper part and a small lower part, the inclination of the two sides of the trapezoid is 1 to 2, the width of the bottom of the trapezoid is more than 1100 cm, and the thickness of the trapezoid is more than 240 cm.
Furthermore, the horizontal section of the precast concrete hollow square box is square, the side length of the square is larger than 470 cm, the height of the square is larger than 550 cm, the bottom of the square is reinforced concrete with the thickness of larger than 60 cm, the periphery of the square is surrounded by reinforced concrete with the thickness of larger than 50 cm, the upper opening of the square is open, and a reinforced lifting lug is arranged at the top end of the enclosure.
Furthermore, protruding bottom feet which extend at least 50 cm outwards are arranged on the bank side and the river surface side of the peripheral bottom of the precast concrete hollow square box.
Furthermore, the breast wall cover plate is L-shaped, the width of the breast wall cover plate is the same as that of the prefabricated concrete hollow square box, the length of the breast wall cover plate is larger than that of the prefabricated concrete hollow square box, a protruded breast wall with the thickness of more than 200 centimeters is arranged on one side of a river surface, and a cover plate with the thickness of more than 80 centimeters is arranged on one side of a river bank.
Furthermore, the gabion bottom protector is a sheet gabion cage with the thickness larger than 50 cm and filled with gravels, and the sheet gabion cage extends to the river center from the bottom of the prefabricated concrete hollow square box by at least 5000 cm.
Further, the backfilled sand and gravel materials sequentially comprise from the bank side to the river bank: the gravel-filled high-strength concrete is characterized in that the ridge is filled in a throwing mode, two stone layers are obliquely arranged in a ratio of 1 to 1, a gravel layer is arranged in a ratio of 1 to 1.5, and gravel materials are back filled.
Furthermore, a pavement concrete support is arranged in the backfilled gravel material under the cast-in-place concrete pavement.
Furthermore, the pavement concrete support is in a strip shape parallel to a river bank line, and the longitudinal section of the pavement concrete support is in an inverted T shape with an enlarged bottom.
The utility model has the advantages and beneficial effects that: the prefabricated concrete hollow square wall type bank protection can enhance the protection effect, has advantages in the aspect of flow selection, and simultaneously reduces the flow velocity near the downstream island head; the bearing capacity of the foundation is enhanced; the bank protection type construction is simple and convenient, and underwater construction can be realized. After the engineering is implemented, the area of the island can be increased, the water and soil loss can be prevented, and the island is combined with the landscape, so that the island can be combined with municipal engineering and becomes a place for people to enjoy leisure and entertainment; although the investment is higher than that of the conventional revetment, the dock function can be realized by adding dock facilities.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the revetment according to the first, fourth, sixth, seventh, eighth and ninth embodiments of the present invention.
Detailed Description
The first embodiment is as follows:
the embodiment is a prefabricated concrete hollow square wall type revetment, as shown in figure 1. The embodiment comprises the following steps: the method is characterized in that a foundation bed flint 1 is arranged at the bottom of a removed river slope (shown by a dotted line in figure 1), prefabricated concrete hollow square boxes 2 internally backfilling block stones 201 are arranged on the foundation bed flint side by side along a river bank line, concrete breast wall cover plates 3 forming the river bank line are arranged on each prefabricated concrete hollow square box, the height of the combined prefabricated concrete hollow square boxes and the concrete breast wall cover plates is greater than the flood level of a river, one side of the river bank of the breast wall cover plate is connected with a cast-in-situ concrete pavement 4, one side of the river bank of the prefabricated concrete hollow square boxes is connected with a gabion guard bottom 5, and a water stabilization layer 401 is arranged under the cast-in-situ concrete pavement on one side of the river bank and is backfilled with a soil gravel material 6.
The embodiment is a structure extending along a river bank, and the main body is a prefabricated concrete hollow square box continuously arranged along the river bank line. The square boxes are arranged on one side facing the river surface to form a vertical wall surface, soil, gravels are backfilled on one side facing the river bank, a concrete road surface or a green belt is laid after the concrete road surface is raised and paved, and the original inclined river bank is reconstructed into a vertical river bank, so that the effective area of the river bank is enlarged, the water flow impact resistance of the river bank can be improved, and the water flow impact resistance can be used as a wharf by slightly modifying.
The river surface side is a side where a structure extends to the river surface, and the bank side is a side where the structure extends to the bank. The longitudinal section is a plane perpendicular to the horizontal plane and perpendicular to the river bank line.
The foundation bed riprap serving as a foundation can adopt various foundation construction modes, the depth of an excavated foundation pit is more than 1000 cm, two sides of the excavated foundation pit are inclined or vertical pit edge surfaces, and riprap is uniformly filled in the pit. After the riprap is uniformly paved, the precast concrete square box is directly hoisted, or concrete is poured on the riprap in advance to form a cast-in-place concrete foundation, and then the square box is hoisted.
The horizontal section of the precast concrete hollow square box can be square or rectangular. The prefabricated concrete hollow square box is hollow in the middle, the periphery of the square box is protected, the bottom of the square box is made of reinforced concrete, and the upper opening of the square box is open. The upper end opening can be covered with the apron, and monomer weight is about 50 tons, and the incasement is filled the stone behind the hoist and mount. The prefabricated concrete hollow square box is prefabricated, is prefabricated and hoisted on site, is not limited by the construction water level, and has obvious advantages in the grabbing construction period.
The top end of the enclosure can be provided with a steel bar lifting lug which is convenient to hoist. In order to expand the bottom, raised bottom feet can be arranged on the side of the bank and the side of the river surface at the bottom of the periphery of the square box, so that the square box is more stable on the foundation.
The cover plate at the top of the prefabricated concrete hollow square box can be designed to be provided with a breast wall, namely, a bulge higher than one side of a river bank is designed on one side of a river surface, and the bulge extending along the river bank line forms the breast wall. The cover plate can also be prefabricated reinforced concrete or cast-in-situ reinforced concrete. The width of the prefabricated reinforced concrete cover plate is as wide as the width of the prefabricated concrete hollow square box, the length of the prefabricated reinforced concrete cover plate is greater than that of the prefabricated concrete hollow square box, the thickness of the prefabricated reinforced concrete cover plate is greater than the enclosure thickness of the prefabricated concrete hollow square box, and the height (thickness) of the breast wall is at least twice greater than the thickness of the cover plate.
The height of the cover plate breast wall and the height of the prefabricated concrete hollow square box are the height from the bottom of the original river slope to the highest flood level (as shown by a water level mark in figure 1), namely, the highest flood level should not exceed the height of the breast wall. The maximum flood level as described herein should be the annual flood level, not the level of a large or extra flood.
On the side facing to the river center, the prefabricated concrete hollow square box forms the footing part of the wall facade, namely the river bottom is provided with a protective bottom extending from the wall footing to the river center. The bottom protection can adopt gabion bottom protection, namely a sheet gabion cage filled with gravel is laid at the river bottom to ensure that the river bottom extending to the river center along the vertical face of the wall is stable, and the phenomenon that silt near the strong bottom feet is emptied by water flow after impacting the wall surface is avoided. The protective bottom should extend at least 5m to the center of the river.
On the side facing the river bank, earth and sand stone materials are required to be refilled for filling the inclined plane of the original river bank, and various earth and sand stone materials can be sequentially refilled from the bank to the river bank for preventing water from permeating, so that a flat roadbed is formed, and the roadbed is also provided with cast-in-place concrete or prefabricated concrete pavement or a green belt. In order to make the roadbed firm, a pavement support can be arranged below the roadbed. The road surface support can be an inverted T shape or an inverted trapezoid shape with an enlarged prefabricated concrete bottom.
Application example:
the main channel of the river estuary island of a certain river is provided with a river bank at one side of the wharf: the height of the prefabricated concrete hollow square box wall is 3.5m, the wall thickness is 0.5m, the wall width is 3.7m, the wall bottom width is 4.7m, and the length of each block along the water flow direction is 3.5 m. The upper part of the hollow square block adopts a prefabricated concrete cover plate with the thickness of 0.5 m. The wall foundation is a riprap foundation bed with the thickness of 2.0 m. The gabion bottom protection with the thickness of 0.5 meter and the length of 50 meters is adopted in front of the wall. The scheme is simple and convenient to construct, can be constructed underwater, and the wall body is prefabricated and is not limited by the construction water level. But the requirement on the flatness of the foundation bed is high, after the foundation bed is polished, two pieces of stones, broken stones and the like need to be backfilled for fine leveling and extremely fine leveling, and a diving group is required for underwater leveling.
The construction process is prefabricated on site, the hoisting is completed, and the wharf type revetment has obvious protection effect on the main river side.
And (3) performing structural stability analysis on the revetment according to the requirements of gravity wharf design and construction specifications (JTS 167-2-2009). The stable calculation formula used is as follows:
(1) along the anti-skidding stability of wall bottom surface, each horizontal joint of wall body and foundation bed bottom surface:
Figure 971142DEST_PATH_IMAGE001
(2) along the anti stability that inclines of wall bottom surface, each horizontal joint of wall body and foundation bed bottom surface:
Figure DEST_PATH_IMAGE002
(3) calculating the bearing capacity of the foundation bed:
Figure 196937DEST_PATH_IMAGE003
in the formula
Figure DEST_PATH_IMAGE004
-a structural importance coefficient;
Figure 38991DEST_PATH_IMAGE005
-a structural coefficient;
Figure DEST_PATH_IMAGE006
-the coefficients of the components from gravity;
Figure 247250DEST_PATH_IMAGE007
-the fractional coefficient of the soil pressure;
Figure DEST_PATH_IMAGE008
-a standard value (kN) of the self-weight of the structure acting on the calculation surface;
Figure 61622DEST_PATH_IMAGE009
-design value of coefficient of friction along the calculated surface;
Figure DEST_PATH_IMAGE010
、
Figure 946401DEST_PATH_IMAGE011
-calculating the standard value (kN) of the horizontal component and the standard value (kN) of the vertical component of the total active earth pressure acting above the surface permanently;
Figure DEST_PATH_IMAGE012
、
Figure 525019DEST_PATH_IMAGE013
-calculating the standard value (kN) of the horizontal component and the standard value (kN) of the vertical component of the total active earth pressure with variable action above the surface;
Figure DEST_PATH_IMAGE014
-a standard value (kN) for the horizontal component of mooring force;
Figure 723919DEST_PATH_IMAGE015
-coefficient of polynomials for mooring line forces;
Figure DEST_PATH_IMAGE016
-a standard value (kN) of the residual water pressure acting on the calculation surface;
Figure 455115DEST_PATH_IMAGE017
-fractional coefficient of residual water pressure;
Figure DEST_PATH_IMAGE018
-effect combination coefficients;
Figure 323845DEST_PATH_IMAGE019
-computing the overturning moment (kn.m) of the face toe for the tether force standard value;
Figure DEST_PATH_IMAGE020
calculating the overturning moment (kN.m) of the face toe by using the standard value pair of the residual water pressure;
Figure 392689DEST_PATH_IMAGE021
-structureCalculating the stability moment (kN.m) of the face toe from the standard value pair of the gravity;
Figure DEST_PATH_IMAGE022
、
Figure 129700DEST_PATH_IMAGE023
calculating the overturning moment and the stabilizing moment (kN.m) of the front toe respectively by using the standard value of the horizontal component force and the standard value of the vertical component force of the total soil pressure with permanent action;
Figure DEST_PATH_IMAGE024
、
Figure 715403DEST_PATH_IMAGE025
calculating the overturning moment and the stabilizing moment (kN.m) of the front toe respectively for the standard value of the horizontal component force and the standard value of the vertical component force of the total soil pressure with variable action;
Figure DEST_PATH_IMAGE026
-the bed top surface maximum stress polynomial coefficient;
Figure 958296DEST_PATH_IMAGE027
-a standard value for maximum stress (kPa) of the top surface of the bed;
Figure DEST_PATH_IMAGE028
-bed load tolerance, 600 kPa.
The stress transmitted to the surface of the foundation after diffusion of the foundation bed adopts linear distribution, and the maximum stress value is as follows:
Figure 262239DEST_PATH_IMAGE029
Figure DEST_PATH_IMAGE030
-the wall bottom width, taken as 5.7 m;
Figure 537362DEST_PATH_IMAGE031
-bed thickness, take 2.45 m;
Figure DEST_PATH_IMAGE032
-maximum stress value (kPa) of the ground surface;
Figure 492418DEST_PATH_IMAGE033
underwater Severe (kN/m) of a masonry foundation bed3）。
And calculating to ensure that the size of the wharf section revetment structure meets the stability requirement.
Example two:
the embodiment is an improvement of the first embodiment, and relates to the refinement of the foundation bed riprap. The shape of the longitudinal section of the foundation bed riprap in the embodiment is a trapezoid with a large upper part and a small lower part, the inclination of two sides of the trapezoid is 1 to 2, the width of the bottom of the trapezoid is larger than 1100 cm, and the thickness of the trapezoid is larger than 245 cm.
In the embodiment, a foundation pit with a certain depth is dug on the basis of flattening the slope bottom (shown by a dotted line in figure 1) of the original river bank, and the foundation of the bank protection is formed by backfilling and riprapping stones. The river bottom refers to the edge of a river channel with flowing water all the year round or the slope bottom of a river bank slope formed naturally, excavation of a foundation pit is implemented at the slope bottom, and cofferdam construction is also needed if water exists all the year round.
Example three:
the embodiment is an improvement of the embodiment and is a refinement of the embodiment about the precast concrete hollow square box. The horizontal section of the precast concrete hollow square box is square, the side length of the square is larger than 470 cm, the height of the square is larger than 550 cm, the bottom of the square is reinforced concrete with the thickness of larger than 60 cm, the periphery of the square is surrounded by reinforced concrete with the thickness of larger than 50 cm, the upper opening of the square is open, and the top end of the square is provided with a reinforced lifting lug.
The prefabricated concrete hollow square box is a main body forming an outer vertical surface of a revetment wall, and has certain strength, so that the prefabricated concrete hollow square box can resist the pressure of earthwork on one side of a river bank and the impact force of water flow, and the adoption of a square box structure with a firm foundation is a very reasonable choice.
The prefabricated concrete hollow square box is of a hollow structure, if the solid concrete cube is adopted, the cost is too high, and the hollow body and the internal backfilled gravel are adopted when continuous impact waves similar to sea waves do not exist, so that the square box has enough weight and strength and enough water flow impact resistance.
Example four:
the embodiment is an improvement of the embodiment and is a refinement of the embodiment about the precast concrete hollow square box. Protruding feet 202 and 203 which extend outwards for at least 50 cm are arranged on the river surface side and the river bank side of the peripheral bottom of the precast concrete hollow square box in the embodiment, as shown in fig. 1.
In order to make the hollow square box of precast concrete more firm and be convenient for link up with other facilities, this embodiment has set up protruding footing. The protruding footing is a protruding stem along the footing of the precast concrete hollow square box in appearance, and the footing effect formed by the precast concrete hollow square boxes arranged side by side in a row with the protruding stem is a protruding footing line along the river shoreline.
Example five:
the present embodiment is a modification of the above-described embodiments, and is a refinement of the above-described embodiments with respect to the breast wall cover. The breast wall cover plate described in this embodiment is L-shaped, the width of the breast wall cover plate is the same as that of the prefabricated concrete hollow square box, the length of the breast wall cover plate is greater than that of the prefabricated concrete hollow square box, a protruding breast wall 301 with the thickness of greater than 200 cm is arranged on one side of the river surface, and a cover plate 302 with the thickness of greater than 80 cm is arranged on one side of the river bank, as shown in fig. 1.
The cover plate with the breast wall forms the top end of the river bank retaining wall, the height of the breast wall is flush with the road surface of the retaining wall, and facilities such as fences can be arranged to serve as safety facilities and landscapes of tourist attractions.
Example six:
the present embodiment is an improvement of the above-described embodiment, and is a refinement of the above-described embodiment regarding the gabion sole. The gabion guard bottom is a sheet gabion cage with the thickness larger than 50 cm and filled with gravels, and the sheet gabion cage extends to the river center from the bottom of the prefabricated concrete hollow square box by at least 5000 cm.
Gravels with larger grain sizes are filled in the gabion cage, the weight of the whole gabion bottom protection is increased, and a solid river bottom can be formed after a period of sediment settlement.
Example seven:
this embodiment is a modification of the above embodiment and is a refinement of the above embodiment with respect to backfilling a earthen sandstone material. The backfilled sand and gravel material described in this embodiment sequentially comprises from the bank side to the river bank: the throwing and filling prism 601, two stone layers 602 arranged at an angle of 1 to 1, a crushed layer 603 arranged at an angle of 1 to 1.5 and a backfilled gravel material 604 as shown in figure 1.
One side of the river bank of the precast concrete hollow square box needs to be backfilled because the original river bank is usually an inclined slope surface. The backfill of the embodiment adopts a plurality of layers of inclined layers made of different materials to prevent the erosion of water flow and avoid the backfill collapse of the river bank caused by the soaking of the water flow for a long time.
Example eight:
the embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment with respect to a cast-in-place concrete pavement. In the present embodiment, a road concrete support 7 is arranged in the backfilled gravel material under the cast-in-place concrete road surface, as shown in fig. 1.
In order to prevent the cast-in-place pavement from collapsing after backfilling, strip-shaped pavement supports can be arranged at proper positions away from a river shoreline along the river shoreline. The pavement support can be made of cast-in-place concrete or precast concrete and the like. The inner support can be arranged on the original inclined river slope surface or a shallow support with a larger bottom surface is used.
Example nine:
the embodiment is a modification of the above embodiment, and is a refinement of the above embodiment with respect to the road surface concrete support. The road surface concrete support described in this embodiment is a strip shape parallel to the river bank line, and the longitudinal cross-sectional shape of the road surface concrete support is an inverted T shape with an enlarged bottom 701, as shown in fig. 1.
The inverted T-shaped pavement with the larger bottom surface is adopted for supporting, and the shallow backfill stone material inserted into the breast wall can bear the stress conditions of treading and the like of general tourists, but is not suitable for the larger bearing stress condition of the wharf.
Finally, it should be noted that the above is only used for illustrating the technical solution of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred arrangement, it should be understood by those skilled in the art that the technical solution of the present invention (such as the original state of the river bank, the material and construction process of the square box, etc.) can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

Claims (9)

1. A prefabricated concrete hollow square wall type revetment, comprising: the foundation bed riprap is arranged at the bottom of a removed river slope, and is characterized in that prefabricated concrete hollow square boxes filled with backfilling block stones are arranged on the foundation bed riprap side by side along a river bank line, a concrete breast wall cover plate forming the river bank line is arranged on each prefabricated concrete hollow square box, the height of the combined prefabricated concrete hollow square boxes and the concrete breast wall cover plate is greater than the flood water level of a river, one side of the river bank of the breast wall cover plate is connected with a cast-in-place concrete pavement, the bottom feet of the river surface of each prefabricated concrete hollow square box are connected with a gabion bottom guard, and a water stabilization layer is arranged below the cast-in-place concrete pavement on one side of the river bank and is backfilled with a soil sand material.
2. The revetment according to claim 1, wherein the longitudinal cross-sectional shape of said bedding riprap is a trapezoid with a large top and a small bottom, the slope of the two sides of said trapezoid is 1 to 2, the width of the bottom is greater than 1100 cm, and the thickness is greater than 240 cm.
3. The revetment according to claim 2, wherein the horizontal cross section of the precast concrete hollow square box is square, the side length of the square is larger than 470 cm, the height of the square is larger than 550 cm, the bottom of the square is reinforced concrete with the thickness of larger than 60 cm, the periphery of the square is enclosed by reinforced concrete with the thickness of larger than 50 cm, the upper opening of the square is open, and the top end of the enclosure is provided with a reinforced lifting lug.
4. The revetment according to claim 3, wherein the peripheral bottom of the precast concrete hollow square box is provided with protruding feet extending at least 50 cm outwards from the bank side and the river surface side.
5. The revetment according to claim 4, wherein said breast wall cover plate is L-shaped, having a width equal to the width of the prefabricated concrete hollow square box and a length greater than the same width of the prefabricated concrete hollow square box, wherein a protruding breast wall with a thickness greater than 200 cm is provided on the river surface side, and a cover plate with a thickness greater than 80 cm is provided on the river bank side.
6. The revetment according to claim 5, wherein the gabion bottom is a sheet gabion cage filled with gravel and having a thickness of more than 50 cm, and the sheet gabion cage extends from the bottom of the prefabricated concrete hollow square box to the river center by at least 5000 cm.
7. The revetment according to claim 6, wherein said backfilled earthen, sandstone material is sequentially from shore to shore: the gravel-filled high-strength concrete is characterized in that the ridge is filled in a throwing mode, two stone layers are obliquely arranged in a ratio of 1 to 1, a gravel layer is arranged in a ratio of 1 to 1.5, and gravel materials are back filled.
8. The revetment according to claim 7, wherein a pavement concrete support is provided in said backfill gravel material beneath said cast-in-place concrete pavement.
9. The revetment according to claim 8, wherein said pavement concrete support is an elongated shape parallel to the river shoreline, and the longitudinal cross-sectional shape of said pavement concrete support is an inverted T shape with an enlarged bottom.
CN202121201829.XU 2021-06-01 2021-06-01 Prefabricated concrete hollow square wall type revetment Active CN215105047U (en)

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