River channel undercut flexible revetment

Abstract

The utility model discloses a riverway undercut flexible revetment which comprises a river bank and a river channel, an anchor block is arranged on the top of the upstream of the river bank along the river direction, the anchor block comprises an abutment, a pile foundation and an anchor cable hole, the abutment is fixedly connected to the top of the pile foundation, the anchor cable hole is formed in the pile foundation, and a transverse river direction anchor cable system is arranged on the river bank in the transverse river direction. The reinforced gabion comprises the gabion, the bottom cross-shaped steel plate, the top cross-shaped steel plate, the peripheral reinforcing steel plate and the gabion hanging columns, the reinforced gabion group is convenient to hoist and has better integrity and scouring resistance, and the integrity of the gabion group can be improved by connecting the gabion group through the anchor cable systems in the transverse river direction and the along river direction. The method can adapt to deformation of the river bank after the undercut bank slope of the river channel collapses, so that further scouring of the river bank and the river channel within the coverage range of the gabion gabion is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of river regulation structures in hydraulic structures, and particularly relates to a flexible revetment for riverbed incision. Background Art

[0002] The water flow in the original river course often carries sediment, and the scouring of the downstream riverbed can be timely supplemented by the sand coming from the upstream, thus maintaining the stability of the river channel. After a dam is built upstream, the sediment content of the discharged water flow decreases, and the relatively clear water flow scours the river channel. The small particles carried away cannot be timely supplemented, so the river channel erosion pit gradually becomes deeper, which is manifested as riverbed incision. After the riverbed incision, the stability of the original river bank will be threatened. For example, after the Three Gorges Project impounded water, the river channels in the middle and lower reaches of the Yangtze River incised, resulting in the lowering of the outlets of Dongting Lake and Poyang Lake. In the dry season, large areas of lake beds in the two lakes were exposed. After the Shuikou Power Station on the Minjiang River in Fujian impounded water, riverbed incision also occurred in the lower reaches of the Minjiang River. The incision depth of the north branch of the Minjiang River near the Jiefang Bridge in Taijiang reached more than 40 meters, and there were also varying degrees of incision phenomena in the area from Luozhou to Chengguan on the south branch of the Minjiang River, directly threatening the safety of the river bank dikes on both the north and south branches. The safety of the dikes with riverbed incision is extremely important.

[0003] Riverbed incision generally occurs in the alluvial plain river channels in the middle and lower reaches of the river. Most river channels are composed of silt and fine sand in layers, with soft geology, small shear resistance parameters, and poor scouring resistance. It is often strengthened by building spur dikes on the upstream side of the incised river section to change the water flow direction, and throwing stones at the lower part of the river bank slope and pressing gabion cages on the upper part. The thrown stones and gabion cages press the silt and fine sand layer of the river bank slope to prevent water flow scouring. The depth of the thrown stones is the elevation of the riverbed during the reinforcement period. When the river channel further incises or the thalweg moves towards the bank slope to the toe of the slope, the river bank slope will further collapse, driving the upper thrown stones and gabion cages to slide and scatter together. The key to the reinforcement of the revetment for riverbed incision lies in how to consider the integrity of the gabion cages not to scatter with the collapse of the river bank slope after further riverbed incision. In view of this, this case is generated. Content of the Utility Model

[0004] The purpose of the utility model is to provide a flexible revetment for riverbed incision, which can adapt to the deformation of the river bank after the river channel incises and the river bank slope collapses, thereby preventing further scouring of the river bank and the river channel within the range covered by the gabion cages.

[0005] To achieve the above object, a flexible revetment for riverbed incision is provided, including: a riverbank and a river channel. At the upstream top of the riverbank, a retaining pier is arranged along the river direction. The retaining pier includes a pier platform, a pile foundation and a cable anchor hole. The top of the pile foundation is fixedly connected to the pier platform, and a cable anchor hole is arranged inside the pile foundation. A transverse cable system is arranged across the river direction of the riverbank. The transverse cable system includes an anchor head, a transverse upstream cable, a transverse downstream cable, a number of transverse bank side clamps and a number of transverse channel side clamps. The anchor head is fixedly connected inside the retaining pier and passes through the cable anchor hole. A longitudinal cable system is arranged along the river direction of the riverbank. The longitudinal cable system includes a longitudinal bank side cable, a longitudinal channel side cable, a number of longitudinal upstream clamps and a number of longitudinal downstream clamps. Multiple reinforced gabion cages are arranged in rows and columns across the river direction and along the river direction on the riverbank and part of the river channel.

[0006] According to the flexible revetment for riverbed incision, the reinforced gabion cage includes a gabion stone cage, a bottom cross steel plate, a top cross steel plate, a peripheral reinforcement steel plate and a stone cage lifting post. The bottom, top and four side corners of the gabion stone cage are respectively fixedly connected with a bottom cross steel plate, a top cross steel plate and a peripheral reinforcement steel plate, and a stone cage lifting post is fixedly connected to the center and top of the gabion stone cage. The stone cage lifting post includes a longitudinal lifting plate and a transverse lifting plate. The top of the stone cage lifting post is provided with a longitudinal lifting plate and a transverse lifting plate. Longitudinal grooves are symmetrically arranged in the middle of both sides of the longitudinal lifting plate. The two longitudinal grooves respectively penetrate the transverse upstream cable and the transverse downstream cable, and the transverse upstream cable and the transverse downstream cable simultaneously penetrate the transverse bank side clamps and the transverse channel side clamps, and nuts are threadedly connected to both ends of the bottom of the transverse bank side clamps and the transverse channel side clamps. Transverse grooves are symmetrically arranged in the middle of both sides of the transverse lifting plate. The two transverse grooves respectively penetrate the longitudinal bank side cable and the longitudinal channel side cable, and the longitudinal bank side cable and the longitudinal channel side cable simultaneously penetrate the longitudinal upstream clamps and the longitudinal downstream clamps, and nuts are threadedly connected to both ends of the bottom of the longitudinal upstream clamps and the longitudinal downstream clamps.

[0007] Beneficial effects:

[0008] 1. The present utility model is provided with a reinforced gabion stone cage, which includes a gabion stone cage, a bottom cross steel plate, a top cross steel plate, a peripheral reinforcement steel plate and a stone cage lifting post, facilitating hoisting, having better integrity and more erosion-resistant characteristics.

[0009] 2. The present utility model is provided with a group of reinforced gabion cages connected by a transverse and longitudinal cable system, which can improve the integrity of the gabion cage group, adapt to the deformation of the riverbank after the collapse of the river channel incision and slope, and thus prevent further erosion of the riverbank and river channel within the coverage of the gabion stone cage.

[0010] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Brief Description of the Drawings

[0011] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0012] Figure 1 It is a three-dimensional front view structure diagram of a flexible revetment for riverbed incision of the present utility model;

[0013] Figure 2 It is a reinforced gabion structure diagram of a flexible revetment for riverbed incision of the present utility model;

[0014] Figure 3 It is a structure diagram of a gabion hanging and fixing an anchor cable for a flexible revetment for riverbed incision of the present utility model;

[0015] Legend Explanation:

[0016] 1. Riverbank; 2. Anchor pier; 21. Pier platform; 22. Pile foundation; 23. Anchor cable hole; 3. Transverse river anchor cable system; 31. Anchor head; 32. Transverse upstream anchor cable; 33. Transverse downstream anchor cable; 34. Transverse bank side chuck; 35. Transverse groove side chuck; 4. Longitudinal river anchor cable system; 41. Longitudinal river bank side anchor cable; 42. Longitudinal river groove side anchor cable; 43. Longitudinal upstream chuck; 44. Longitudinal downstream chuck; 5. Reinforced gabion cage; 51. Gabion; 52. Bottom cross steel plate; 53. Top cross steel plate; 54. Peripheral reinforcement steel plate; 55. Gabion hanging column; 551. Longitudinal hanging plate; 552. Transverse hanging plate; 553. Longitudinal groove; 554. Transverse groove; 6. River channel. Detailed Embodiments

[0017] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be construed as a limitation on the protection scope of the present utility model.

[0018] Refer to Figures 1-3, in an embodiment of the utility model, a flexible revetment for river incision includes a riverbank 1 and a river channel 6. A retaining pier 2 is arranged along the river direction at the upstream top of the riverbank 1. The retaining pier 2 is mainly used to fix the cross-river cable anchor system 3. The retaining pier 2 includes a pier platform 21, a pile foundation 22 and a cable anchor hole 23. The top of the pile foundation 22 is fixedly connected to the pier platform 21, and a cable anchor hole 23 is arranged inside the pile foundation 22. A cross-river cable anchor system 3 is arranged transversely across the riverbank 1. The cross-river cable anchor system 3 includes an anchor head 31, a cross-upstream cable 32, a cross-downstream cable 33, a number of lateral bank-side clamps 34 and a number of lateral channel-side clamps 35. The anchor head 31 is fixedly connected inside the retaining pier 2 and passes through the cable anchor hole 23. A longitudinal cable anchor system 4 is arranged along the river direction of the riverbank 1. The longitudinal cable anchor system 4 includes a longitudinal bank-side cable 41, a longitudinal channel-side cable 42, a number of longitudinal upstream clamps 43 and a number of longitudinal downstream clamps 44. A number of reinforced gabion cages 5 are arranged in rows transversely and longitudinally across the riverbank 1 and part of the river channel 6. The reinforced gabion cages 5 are convenient for hoisting, more integral and more resistant to scouring.

[0019] The reinforced gabion cage 5 includes a gabion stone cage 51, a bottom cross steel plate 52, a top cross steel plate 53, a peripheral reinforcement steel plate 54 and a stone cage lifting post 55. The bottom, top and four side corners of the gabion stone cage 51 are fixedly connected to the bottom cross steel plate 52, the top cross steel plate 53 and the peripheral reinforcement steel plate 54 respectively, and a stone cage lifting post 55 is fixedly connected to the center and top of the gabion stone cage 51. After installing the stone cage lifting post 55, hoisting is more convenient. After the surrounding steel plates are reinforced, the overall stone cage is more resistant to scouring. The stone cage lifting post 55 includes a longitudinal lifting plate 551 and a transverse lifting plate 552. The top of the stone cage lifting post 55 is provided with a longitudinal lifting plate 551 and a transverse lifting plate 552. Longitudinal grooves 553 are symmetrically arranged in the middle of both sides of the longitudinal lifting plate 551. Two groups of card slots are symmetrically arranged at different elevations of the cross steel plate, which is convenient for lifting the stone cage and fixing the cable anchor. The two longitudinal grooves 553 respectively penetrate the cross-upstream cable 32 and the cross-downstream cable 33, and the cross-upstream cable 32 and the cross-downstream cable 33 simultaneously penetrate the lateral bank-side clamps 34 and the lateral channel-side clamps 35, and nuts are threadedly connected to both ends of the bottom of the lateral bank-side clamps 34 and the lateral channel-side clamps 35. Transverse grooves 554 are symmetrically arranged in the middle of both sides of the transverse lifting plate 552. The two transverse grooves 554 respectively penetrate the longitudinal bank-side cable 41 and the longitudinal channel-side cable 42, and the longitudinal bank-side cable 41 and the longitudinal channel-side cable 42 simultaneously penetrate the longitudinal upstream clamps 43 and the longitudinal downstream clamps 44, and nuts are threadedly connected to both ends of the bottom of the longitudinal upstream clamps 43 and the longitudinal downstream clamps 44, which can better achieve fixation.

[0020] Working principle: The flexible revetment for riverbed downcutting includes riverbank 1, river channel 6, anchor pier 2, transverse river cable system 3, longitudinal river cable system 4, and reinforced gabion cage 5. The anchor piers 2 are longitudinally distributed on the riverbank 1; the reinforced gabion cages 5 are arranged in rows longitudinally and transversely on the riverbank 1 and part of the river channel 6; the transverse river cable system 3 is arranged transversely at intervals according to the reinforced gabion cages 5, and each transverse river cable system 3 consists of an anchor head 31, an upstream transverse cable 32, a downstream transverse cable 33 and several clamps; the longitudinal river cable system 4 is arranged longitudinally at intervals according to the reinforced gabion cages 5, and each longitudinal river cable system 4 consists of a longitudinal riverside cable 41, a longitudinal channel-side cable 42 and several clamps. The reinforced gabion cage group connected by the transverse river cable system 3 and the longitudinal river cable system 4 is more integral.

[0021] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A flexible revetment for riverbed downcutting, comprising: Riverbank (1) and river channel (6), characterized in that a retaining pier (2) is arranged along the river direction at the upstream top of the riverbank (1), the retaining pier (2) includes a pier platform (21), a pile foundation (22) and a cable anchor hole (23), the top of the pile foundation (22) is fixedly connected to the pier platform (21), and a cable anchor hole (23) is arranged inside the pile foundation (22), a transverse river cable system (3) is arranged across the river direction of the riverbank (1), the transverse river cable system (3) includes an anchor head (31), a transverse upstream cable (32), a transverse downstream cable (33), a number of transverse bank side chucks (34) and a number of transverse channel side chucks (35), the anchor head (31) is fixedly connected inside the retaining pier (2), and the anchor head (31) passes through the cable anchor hole (23), a longitudinal river cable system (4) is arranged along the river direction of the riverbank (1), the longitudinal river cable system (4) includes a longitudinal bank side cable (41), a longitudinal channel side cable (42), a number of longitudinal upstream chucks (43) and a number of longitudinal downstream chucks (44), and a plurality of reinforced gabion cages (5) are arranged in rows and columns across the river direction and along the river direction on the riverbank (1) and part of the river channel (6).

2. The flexible revetment for riverbed downcutting according to claim 1, wherein The reinforced gabion cage (5) includes a gabion stone cage (51), a bottom cross steel plate (52), a top cross steel plate (53), a peripheral reinforcement steel plate (54) and a stone cage hanging post (55), the bottom, top and four side corners of the gabion stone cage (51) are fixedly connected with a bottom cross steel plate (52), a top cross steel plate (53) and a peripheral reinforcement steel plate (54) respectively, and a stone cage hanging post (55) is fixedly connected to the center and top of the gabion stone cage (51), the stone cage hanging post (55) includes a longitudinal hanging plate (551) and a transverse hanging plate (552), the top of the stone cage hanging post (55) is provided with a longitudinal hanging plate (551) and a transverse hanging plate (552), longitudinal grooves (553) are symmetrically arranged in the middle of both sides of the longitudinal hanging plate (551), the two longitudinal grooves (553) respectively penetrate through the transverse upstream cable (32) and the transverse downstream cable (33), and the transverse upstream cable (32) and the transverse downstream cable (33) simultaneously penetrate through the transverse bank side chuck (34) and the transverse channel side chuck (35), and nuts are threadedly connected to both ends of the bottom of the transverse bank side chuck (34) and the transverse channel side chuck (35), transverse grooves (554) are symmetrically arranged in the middle of both sides of the transverse hanging plate (552), the two transverse grooves (554) respectively penetrate through the longitudinal bank side cable (41) and the longitudinal channel side cable (42), and the longitudinal bank side cable (41) and the longitudinal channel side cable (42) simultaneously penetrate through the longitudinal upstream chuck (43) and the longitudinal downstream chuck (44), and nuts are threadedly connected to both ends of the bottom of the longitudinal upstream chuck (43) and the longitudinal downstream chuck (44).

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