TWI756152B - Flood control bank with spillway type permeable weir embankment - Google Patents

Abstract

This creation is a flood control bank with a spillway type permeable weir embankment, which is installed on the site of the river bank and includes a rammed clay soil core, a protective structure is covered on the rammed clay soil core, and the protective structure is provided with a drainage structure, The protective structure has an upper layer concrete plate and a lower layer concrete plate which are arranged at intervals and both have double-layer spot welding wire meshes, a drainage corridor is formed between the upper layer concrete plate and the lower layer concrete plate, and the drainage structure has a drainage channel disposed in the drainage layer. The drainage layer of the corridor and most of the drainage pipes, the majority of the drainage pipes are further perpendicular to the upstream and downstream slopes, the majority of the drainage pipes are respectively located on the water-facing surface and the back-water surface of the protective structure, and one end is exposed on the upper concrete plate and the other end is extended. When entering the drainage corridor, the flood protection bank can reduce the lateral pressure of the flood, protect the rammed clay soil core, increase the shear strength and absorb the impact force.

Description

Flood control bank with spillway type permeable weir embankment

This creation is a kind of flood control bank protection, especially the flood control bank protection bank with spillway type permeable weir embankment.

In order to prevent the river from overflowing and damaging property and life, a flood protection bank will be set up beside the river bank to block the flood and achieve the purpose of protection. Among them, the rammed earth core of the flood protection bank is covered with a layer of concrete.

However, the concrete plate experiences thermal expansion and cold contraction under the sun, which is prone to expansion cracks. Water easily penetrates into the concrete plate through expansion cracks to soften the rammed earth core, resulting in an increase in saturation and a decrease in shear resistance, resulting in the failure of the flood control bank. protection function.

The main purpose of this creation is to provide a flood protection bank with spillway type permeable weir embankment, thereby improving the problem that the current concrete plate of flood protection bank protection is prone to expansion cracks, which leads to water infiltration, softens the rammed earth core and affects the protection function.

In order to achieve the purpose of the previous disclosure, the flood control bank with spillway-type permeable weir embankment in this creation is located on the site of the river bank. The flood control bank includes: a rammed clay core; A protective structure, which is covered on the rammed clay core, the protective structure includes a lower concrete slab, a lattice beam device and an upper concrete slab, the lower concrete slab is installed on the rammed clay core, the lattice girder device Set on the rammed clay core and protruding out of the lower concrete slab, the upper and lower concrete slabs are arranged and connected to the lattice beam device, wherein the lower concrete slab and the upper concrete slab are both configured The upper and lower layers of spot-welded steel wire mesh members, a drainage corridor is formed between the lower concrete plate and the upper concrete plate; and a drainage structure, which is installed on the protective structure, the drainage structure includes a drainage layer and a plurality of drainage pipes, the drainage layer is arranged in the drainage corridor between the lower concrete slab and the upper concrete slab, each of the drainage layers The pipe system is arranged on the upper concrete plate, and one end of each of the drainage pipes is exposed on the upper concrete plate, and the other end of each of the drainage pipes extends into the drainage corridor, wherein the plurality of drainage pipes are respectively located in the upper concrete plate. The upstream and downstream surfaces of the protective structure.

In the above, the drainage structure includes drainage pipes on the slopes that are perpendicular to the upstream and downstream, wherein the drainage pipes located on the upstream surface of the protective structure are perpendicular to the upstream surface of the protective structure, and are located on the downstream surface of the protective structure. The said drainage pipe is perpendicular to the backwater surface of the protective structure.

Among the above, the flood protection bank with spillway-type permeable weir embankment in this creation provides the following protections: 1. Protection 1: The set drainage structure can assist in drainage, and cooperate with the configuration of the drainage corridor. Even if the drainage layer is hollowed out, the flood can still pass through the drainage corridor quickly, reducing the flood side of the upstream surface. to pressure. 2. Protection 2: When the flood passes through the flood protection bank, the rammed clay core is protected by the lower concrete plate with double-layer spot-welded steel wire mesh, so that the rammed clay core is not easily dissolved by water. 3. Protection 3: Floods pass over the protective structure of the flood protection bank, which can increase the normal force of the flood protection bank’s downward pressure, thereby increasing the shear strength, and more resistant to the lateral pressure of the flood. Therefore, when the flood overflows the top, The flood protection bank is not easily pushed away or collapsed. 4. Protection 4: The upper concrete plate is equipped with double-layer spot-welded steel wire mesh, which will not be very strong. When it is impacted by driftwood or soil and rocks brought by the flood, it will dent and absorb the impact force. After the flood recedes, it can be The damaged upper concrete plate is partially knocked out, filled with sand, and then the upper concrete plate is applied, which can repair the protective structure of the flood control bank and simplify the repair process and cost. 5. Protection 5: Configure the drainage pipes on the vertical upstream and downstream slopes, which can extend the length of the flow line of the flood entering the flood protection bank, so that the upstream water flow will not directly rush into the drainage corridor located in the middle layer, and reduce the impact of flood on flood control. The infiltration force of the revetment; and when the flood recedes, it is not easy to bring out the graded sand and gravel in the drainage corridor of the middle layer.

As shown in FIGS. 1 to 3 , the flood control bank protection system with the spillway-type permeable weir embankment is installed on the site 10 of the river bank, and includes a rammed clay core 20 , a protection structure 30 and a drainage structure 40 .

The compacted clay core 20 is a structure formed by layered rolling, and the compacted clay core 20 is arranged on the site 10 on the river bank.

The protective structure 30 is overlaid on the rammed clay core 20. The protective structure 30 includes a lower concrete slab 31, a lattice beam device 32 and an upper concrete slab 33. The lower concrete slab 31 is arranged on the rammed clay core 20, the lattice beam device 32 is arranged on the rammed clay soil core 20 and protrudes out of the lower concrete plate 31, and the upper and lower concrete plates 33 and the lower concrete plate 31 are arranged and connected to the lattice beam device 32, wherein, Both the lower concrete plate 31 and the upper concrete plate 33 are components configured with upper and lower double-layer spot welding wire meshes 34 , and a drainage corridor 35 is formed between the lower concrete plate 31 and the upper concrete plate 33 .

As shown in FIG. 1 and FIG. 10 , the drainage structure 40 is arranged on the protective structure 30 . The drainage structure 40 includes a drainage layer 41 and a plurality of drainage pipes 42 and 42 ′. The drainage layer 41 is arranged on the lower concrete plate 31 . The drainage corridor 35 between the upper-layer concrete plate 33, each of the drainage pipes 42, 42' is arranged on the upper-layer concrete plate 33, and one end of each of the drainage pipes 42, 42' is exposed on the upper layer The concrete plate 33 , and the other end of each of the drainage pipes 42 , 42 ′ extends into the drainage gallery 35 , wherein the plurality of drainage pipes 42 , 42 ′ are respectively located on the water-facing surface 50 and the back-water surface 60 of the protective structure 30 . As shown in FIG. 1 , the drainage pipes 42 are arranged horizontally on the upper concrete plate 33 , or as shown in FIG. The drain pipe 42 ′ of the water-facing surface 50 is perpendicular to the water-facing surface 50 of the protective structure 30 , and the drain pipe 42 ′ located on the back-water surface 60 of the protective structure 30 is perpendicular to the back-water surface 60 of the protective structure 30 . .

In the above, on the upstream surface 50 of the flood protection bank, one drain pipe 42, 42' is arranged every 2 to 4 square meters, and on the back surface 60 of the flood protection bank, every 2 to 4 square meters One of the drainage pipes 42 and 42 ′ is arranged in the area, wherein the drainage pipes 42 and 42 ′ are polyvinyl chloride (Polyvinyl Chloride, abbreviation: PVC) pipes with a diameter of 5 cm.

In the above, the thickness of the lower concrete plate 31 is 20 to 30 centimeters, the thickness of the upper concrete plate 33 is 20 to 30 centimeters, the wire diameter of the double-layer spot welding wire mesh 34 is 5 m/m, and the double-layered The mesh of the spot welded wire mesh 34 is 10×10 cm, and the drainage layer 41 is a component formed by filter sand or graded sand.

As shown in Figure 4 to Figure 7 and Figure 10, a rammed clay core 20 is formed on the site 10 on the river bank by layered rolling, and then a lower concrete plate 31 and a lattice beam device 32 are set on the rammed clay core 20, When the filter sand or graded sand is filled, and the filter sand and graded sand are laid to avoid the lattice beam device 32 and no template is used, the filter layer sand and graded sand close to the lattice beam device 32 are inclined. On the other hand, after the drainage layer 41 formed by the filter layer sand and the graded sand is laid, the upper concrete plate 33 and the drainage pipes 42 and 42' are arranged on the drainage layer 41.

As shown in FIGS. 8 and 11 , when the flood overflows the roof, the floodwater in the lower part can enter the drainage corridor 35 through the drainage pipes 42 and 42 ′ of the upstream surface 50 , and then be discharged through the drainage pipes 42 and 42 ′ of the downstream surface 60 . The lower concrete slab 31 is quickly drained like a spillway.

As shown in FIG. 9 , when the entrained objects 70 such as driftwood, soil, and stone brought by the flood hit the upper concrete plate 33 at the upstream surface 50 of the flood protection bank, because the upper concrete plate 33 is configured with double-layer spot welding wire mesh 34, so the structure will not be too strong, and when it is hit, it will dent and absorb the impact force to protect the rammed clay core 20. When the flood recedes, the concave and damaged upper concrete plate 33 can be repaired.

To sum up, the flood protection bank with spillway-type permeable weir embankment in this creation provides the following protections: 1. Protection 1: The drainage structure 40 and the drainage corridor 35 can assist in drainage, even if the drainage layer 41 is hollowed out, the flood can be allowed to pass through the drainage corridor 35 quickly, and the upstream surface 50 of the flood protection bank can be effectively reduced. withstand the lateral pressure of the flood. 2. Protection 2: The flood control bank provides a drainage structure 40 and a drainage corridor 35, which can quickly drain floods, and the drainage structure 40 and the drainage corridor 35 are located above the lower concrete plate 31, so the rammed clay core 20 is subjected to a The protection of the lower-layer concrete plate 31 of the double-layer spot-welded steel wire mesh 34 makes the rammed clay soil core 20 less likely to be dissolved by water and collapse. 3. Protection 3: When the flood passes over the protective structure 30 of the flood protection bank, it can increase the normal force of the flood protection bank's downward pressure, increase the shear strength, and resist the lateral pressure of the flood, so the flood protection bank is not easy to be pushed. walk or break the embankment. 4. Protection 4: The upper concrete plate 33 is equipped with a double-layer spot-welded steel wire mesh 34, which will dent and absorb the impact force when it is hit. In addition to protection, the damaged upper concrete plate 33 can also be removed after the flood recedes. Partially knocked out, filled with sand and applied as the upper concrete plate 33, the protective structure 30 of the flood control bank can be repaired, and the repair process and cost can be simplified.

In addition, the drain pipe 42' is perpendicular to the corresponding water-facing surface 50 or the back-water surface 60, so the axial direction of the drain pipe 42' located on the water-facing surface 50 forms an included angle with the direction of the water flow impacting the water-facing surface 50, slowing the entry into the water-facing surface The impact force of the drainage pipe 42' of 50, thereby reducing the scouring force of the filter sand or graded sand in the drainage layer 41; Therefore, when the water flows out of the drainage pipe 42' of the backwater surface 60, the filter sand or graded sand entrained in the water is blocked by the vertical drainage pipe 42' due to gravity and is not easy to flow out with the water. Drain pipe 42'.

Therefore, when the flood infiltrates from the upstream surface 50 and seeps out from the downstream surface 60, the filter sand or graded sand in the drainage layer 41 can be reduced to be taken away, the degree of hollowing out of the drainage layer 41 can be slowed down, and the flood receding When the drainage pipe 42 ′ adopts the vertical configuration, the filter sand or graded sand in the drainage layer 41 can also be reduced to be carried away.

10: Site 20: Rammed Clay Core 30: Protective structure 31: Lower concrete version 32: Grid beam device 33: Upper concrete version 34: Double spot welded wire mesh 35: Drainage corridor 40: Drainage structure 41: Drainage layer 42: Drain pipe 42': drain pipe 50: Upward water surface 60: Backwater 70: Entrainment

Figure 1: Schematic cross-section of the flood control bank with spillway-type permeable weir embankment for this creation. Figure 2: A schematic top plan view of the flood control bank with a spillway-type permeable weir for this creation. FIG. 3 is a schematic cross-sectional view of the section line A-A of FIG. 2 . Figure 4: A schematic cross-sectional view of a rammed clay core for flood protection with a spillway-type permeable weir for this creation. Figure 5: A schematic cross-sectional view of the concrete slab and lattice beam device under the flood protection bank with the spillway-type permeable weir set in the rammed clay core for this creation. FIG. 6 is a schematic cross-sectional view of setting the drainage layer in FIG. 5 . FIG. 7: A schematic cross-sectional view of setting the upper concrete plate for FIG. 6. FIG. Figure 8: Schematic diagram of the use state of the flood protection bank with spillway-type permeable weir embankment for this creation (1). Figure 9: Schematic diagram of the use state of the flood protection bank with spillway-type permeable weir embankment for this creation (2). Figure 10: Another cross-sectional schematic diagram of the flood control bank with spillway-type permeable weir embankment for this creation. Figure 11: It is a schematic diagram of the use state of the flood control bank of Figure 10.

10: Site

20: Rammed Clay Core

30: Protective structure

31: Lower concrete version

32: Grid beam device

33: Upper concrete version

34: Double spot welded wire mesh

35: Drainage corridor

40: Drainage structure

41: Drainage layer

42: Drain pipe

50: Upward water surface

60: Backwater

Claims (10)

A flood protection bank with a spillway-type permeable weir embankment, which is set at a site on a river bank, the flood protection bank comprising: a rammed clay core; A protective structure is covered on the rammed clay core, the protective structure includes a lower concrete slab, a lattice beam device and an upper concrete slab, the lower concrete slab is arranged on the rammed clay core, the lattice girder device Set on the rammed clay core and protruding out of the lower concrete slab, the upper and lower concrete slabs are arranged and connected to the lattice beam device, wherein the lower concrete slab and the upper concrete slab are both configured A member of the upper and lower double-layer spot-welded steel wire mesh, a drainage corridor is formed between the lower-layer concrete plate and the upper-layer concrete plate; and a drainage structure, which is installed on the protective structure, the drainage structure includes a drainage layer and a plurality of drainage pipes, the drainage layer is arranged in the drainage corridor between the lower concrete plate and the upper concrete plate, each of the drainage layers The pipe system is arranged on the upper concrete plate, and one end of each of the drainage pipes is exposed on the upper concrete plate, and the other end of each of the drainage pipes extends into the drainage corridor, wherein the plurality of drainage pipes are respectively located in the upper concrete plate. The upstream and downstream surfaces of the protective structure. The flood protection bank with spillway-type permeable weir embankment as claimed in claim 1, wherein the drainage pipe system is horizontally arranged on the upper concrete slab. According to the flood protection bank with spillway type permeable weir embankment as described in claim 1, the drainage pipe system located on the upstream surface of the protective structure is perpendicular to the upstream surface of the protective structure, and the drainage system located on the downstream surface of the protective structure The piping is perpendicular to the leeward surface of the protective structure. The flood protection bank with spillway-type permeable weir embankment as described in any one of claims 1 to 3, wherein, on the upstream surface of the flood protection bank, one drain pipe is arranged every 2 to 4 square meters, the On the backwater surface of the flood protection bank, one of the drainage pipes is arranged every 2 to 4 square meters. The flood protection bank with spillway type permeable weir embankment according to any one of claims 1 to 3, wherein the drainage pipe is a polyvinyl chloride pipe with a diameter of 5 cm. The flood protection bank with spillway type permeable weir embankment according to claim 4, wherein the drainage pipe is a polyvinyl chloride pipe with a diameter of 5 cm. The flood protection bank with spillway type permeable weir embankment according to any one of claims 1 to 3, wherein the thickness of the lower concrete slab is 20 to 30 cm, and the thickness of the upper concrete slab is 20 to 30 cm. The flood protection bank with spillway-type permeable weir embankment as claimed in claim 6, wherein the drainage layer is a member formed by filter sand or graded sand. The flood protection bank with spillway type permeable weir embankment according to any one of claims 1 to 3, wherein the diameter of the steel wire of the double-layer spot-welded steel wire mesh is 5 m/m, and the holes of the double-layered spot-welded steel wire mesh The mesh is 10x10cm. The flood protection bank with spillway-type permeable weir embankment as claimed in claim 7, wherein the diameter of the steel wire of the double-layer spot-welded steel wire mesh is 5 m/m, and the mesh of the double-layered spot-welded steel wire mesh is 10×10 cm.

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