CN115897476A - Compound prevention and control method for debris flow - Google Patents
Compound prevention and control method for debris flow Download PDFInfo
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- CN115897476A CN115897476A CN202211484833.0A CN202211484833A CN115897476A CN 115897476 A CN115897476 A CN 115897476A CN 202211484833 A CN202211484833 A CN 202211484833A CN 115897476 A CN115897476 A CN 115897476A
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Abstract
The invention discloses a compound prevention and control method of debris flow, before prevention and control, a shunting type blocking system with the following structure is arranged in a valley of a debris flow prevention and control area, the shunting type blocking system comprises a blocking device arranged at the downstream of a debris flow channel and a main drainage channel dug along the debris flow channel, and a closed cover plate is arranged on the main drainage channel and penetrates through the lower part of the blocking device; a drainage branch channel dug along the width direction of the debris flow channel is arranged in the debris flow channel at the upstream of the retaining device, one end of the drainage branch channel is communicated with the drainage main channel, and the other end of the drainage branch channel inclines towards the upstream direction of the debris flow channel; the upper cover of the drainage branch channel is provided with a water filtering plate with drainage holes, and a plurality of drainage holes are distributed from the upstream to the downstream of the debris flow channel. The invention has the advantages of reasonable structural design, smooth water drainage, being beneficial to delaying the formation of debris flow, reducing the impact force of the debris flow and the like.
Description
Technical Field
The invention relates to the technical field of debris flow treatment, in particular to a composite debris flow prevention method.
Background
The debris flow refers to special flood flow in mountain areas or other gullies, deep ravines and severe terrains, which is caused by heavy rain, heavy snow or other natural disasters and carries a large amount of silt and stones. The debris flow has the characteristics of high abruptness, high flow speed, high flow, high material capacity, high destructive power and the like. The traffic facilities such as roads and railways, even villages and towns and the like are often destroyed by debris flow, and huge loss is caused.
The debris flow is a geological action between flowing water and landslide, under a proper terrain condition, a large amount of water soaks solid accumulated substances in a flowing water mountain slope or a ditch bed, so that the stability of the solid accumulated substances is reduced, and the solid accumulated substances saturated with water move under the action of self gravity to form the debris flow. The debris flow is formed by saturated dilution of soft soil mountain bodies containing sand and stones in rainstorm and flood, and has large area, volume and flow.
At present, the treatment aiming at the debris flow is mainly to build a concrete debris retaining dam in a debris flow channel, arrange a drainage hole on a dam body and arrange an overflow port on a dam top, or adopt a flexible protective net to block the debris flow, and the flexible net protective structure has the characteristics of investment saving, good landscape property, convenient installation and the like. The blocking difficulty of the debris flow lies in that the debris flow has huge impact force, the reason for forming the impact force is mainly determined by the fluidity and the gravitational potential energy of the debris flow, and the fluidity determines the flow speed of the debris flow, so that the gravitational potential energy of the debris flow is quickly converted into kinetic energy to form impact, the water content in the debris flow determines the fluidity of the debris flow, the debris flow is managed, on one hand, the forming probability of the debris flow needs to be reduced, on the other hand, the impact force of the debris flow needs to be reduced, and blocking is facilitated. Therefore, how to reduce the impact force of the debris flow becomes an urgent problem to be solved.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a mud-rock flow composite control method which has reasonable structural design and smooth water drainage, is beneficial to delaying the formation of mud-rock flow and reducing the impact force of the mud-rock flow.
In order to solve the technical problem, the invention adopts the following technical scheme:
before prevention, a shunting type blocking system with the following structure is arranged in a valley of a debris flow prevention area, and comprises a blocking device arranged at the downstream of a debris flow channel and a main drainage channel dug along the debris flow channel, wherein a closed cover plate is arranged on the main drainage channel and penetrates through the lower part of the blocking device; a drainage branch channel dug along the width direction of the debris flow channel is arranged in the debris flow channel at the upstream of the retaining device, one end of the drainage branch channel is communicated with the drainage main channel, and the other end of the drainage branch channel inclines towards the upstream direction of the debris flow channel; the upper cover of the drainage branch channel is provided with a water filtering plate with drainage holes, and a plurality of drainage holes are distributed from the upstream to the downstream of the debris flow channel.
By adopting the structure, once the storm water occurs, a part of the rain water flows into the drainage branch channel through the drainage holes of the water filtering plates and is converged into the drainage main channel, so that the phenomenon that the water content of solid accumulated substances is increased to form debris flow due to the fact that the storm water is too much accumulated in the solid accumulated substances in the channel bed is avoided. On the other hand, once a portion of the solid accumulated material moves downstream as a result of the debris flow initially formed by the increased water content, a portion of the water in the solid accumulated material flows through the strainer plate into the drainage branch channels and then into the main drainage channel and then through the retaining device via the main drainage channel as it passes through each of the drainage branch channels. Through the multichannel drainage lateral canal that sets up along the mud-rock flow channel, can reduce the mobility of mud-rock flow on the one hand, reduce the velocity of flow of mud-rock flow, on the other hand also can reduce the whole quality of mud-rock flow, under the condition that speed and quality all reduce, just reduced the impact force of mud-rock flow to the device of blocking.
Furthermore, the main drainage channel extends along the center line of the debris flow channel, and the branch drainage channels are distributed on two sides of the main drainage channel.
Therefore, the drainage on two sides of the main drainage channel can be quickly gathered in the main drainage channel.
Furthermore, a plurality of low retaining dams are arranged in the debris flow channel at the upstream of the retaining device along the width direction of the debris flow channel, and the low retaining dams are distributed from the upstream of the debris flow channel to the downstream.
Therefore, the upstream debris flow is blocked step by step through the blocking low dam, so that the speed of the debris flow can be reduced, partial debris flow is intercepted, and the impact force of the debris flow is reduced.
Furthermore, the blocking short dams and the drainage branch channels are arranged in a one-to-one correspondence mode, and the blocking short dams are located in the upstream direction of the corresponding drainage branch channels.
Therefore, once the debris flow or flood flows through the retaining low dam, the water flow or debris flow falls from a high water level, and due to the fact that a fall exists, the water flow rushes down and forms a reaction force with water in the next section, so that the water flow generates huge disturbance, a vortex of rolling disturbance is formed in the region where the drainage branch channel is located, and therefore the phenomenon that silt is accumulated in the drainage branch channel and blocked can be avoided, and the drainage capacity of the drainage branch channel is guaranteed. In addition, the drainage branch channel is obliquely arranged in the width direction of the debris flow channel, the retaining short dam is corresponding to the drainage branch channel and is also obliquely arranged, and after the upstream debris flow impacts the retaining short dam, the component force of the impact force can discharge the force along the oblique direction of the retaining short dam, so that the reliability of the retaining short dam is improved.
Furthermore, one end of the low retaining dam is connected with the side wall of the debris flow channel, and the other end of the low retaining dam forms an open circulation area; and the circulation areas of two adjacent low retaining dams are sequentially arranged in a staggered manner from the upstream to the downstream of the debris flow channel.
Like this, set the one end of blocking the low dam into open circulation district, can avoid blocking the low dam on the one hand and form the ditch at the mud-rock flow channel, make things convenient for local resident or livestock to pass through smoothly. In addition, after the debris flow occurs, the dredging equipment can also pass through the circulation area to carry out dredging operation on the sludge in the debris flow channel.
Further, the height of the blocking short dam is 0.5-1.2 meters.
Furthermore, the lower half part of the blocking low dam is provided with a water permeable hole with the diameter of 2 cm-10 cm.
Thus, once the debris flow is stopped by the retaining dam, water in the debris flow can flow through the retaining low dam to the place of the drainage branch and into the drainage branch through the water permeable holes.
Furthermore, the blocking device comprises at least two fixing supports arranged at intervals along the width direction of the trench bottom, and the distance between every two adjacent fixing supports is larger than the width of the dredging equipment; the middle part of the fixed support is provided with a guide hole which is arranged in a penetrating way along the length direction of the ditch bottom, a main push-pull column is slidably arranged in a penetrating way, one end of the main push-pull column facing to the upstream extends upwards and is provided with an auxiliary baffle plate, the auxiliary baffle plates are arranged along the width direction of the ditch bottom, and a channel for dredging equipment to pass through is arranged between every two adjacent auxiliary baffle plates; one side of the fixed support facing the downstream is provided with a vertically arranged rotating shaft, and the rotating shaft is positioned at the position of the fixed support far away from the guide hole; the main baffle plates are rotatably arranged on the rotating shaft, one ends of the main baffle plates, far away from the rotating shaft, face to the downstream direction and deflect towards the middle part of the valley, and a channel for pedestrians or livestock to pass through is formed between every two adjacent main baffle plates; an auxiliary push-pull column is hinged between one end, facing the downstream, of the main push-pull column and the main blocking baffle, and an included angle between the auxiliary push-pull column and the main push-pull column is an obtuse angle, so that the main push-pull column can push the main blocking baffle to rotate towards the upstream to be closed through the auxiliary push-pull column in the downstream sliding process of the main push-pull column.
Therefore, when debris flow does not occur, pedestrians or livestock can pass through the channel between the main blocking plates, and production and life are not affected. In case take place the debris flow, the debris flow mix with silt and down from the upper reaches, strike vice baffle that blocks earlier, because vice baffle that blocks is installed on main push-and-pull post, and the one end upwards extension towards the upper reaches of main push-and-pull post, vice baffle that blocks promptly has the migration interval between baffle and the fixed bolster, vice baffle that blocks is under the debris flow impact, promote main push-and-pull post and remove towards the low reaches, and the vice push-and-pull post through articulated setting promotes main baffle that blocks and rotate towards the upstream direction and close, realize blocking the debris flow. After the debris flow stops, dredging is carried out in the upstream direction from the downstream, when the debris flow reaches the fixed support, firstly, deposits facing the downstream side of the main baffle plate are cleared away, then, the hinge structure between the auxiliary push-pull column and the main baffle plate or the hinge structure between the auxiliary push-pull column and the main push-pull column are dismantled, the main baffle plate can be opened in a rotating mode facing the downstream direction, and due to the fact that the distance between every two adjacent fixed supports is larger than the width of dredging equipment, the completely opened main baffle plate can be used for the dredging equipment to pass through, and dredging operation continues to be carried out in the upstream direction. After the dredging operation is completed, the auxiliary push-pull column can be connected with the main push-pull column and the main baffle again, the main baffle, the auxiliary baffle and the main push-pull column are restored to the original state, the next blocking can be carried out, and the recycling is realized.
In conclusion, the invention has the advantages of reasonable structural design, smooth water drainage, being beneficial to delaying the formation of debris flow, reducing the impact force of the debris flow and the like.
Drawings
Fig. 1 is a schematic view of the overall structure of the retaining system.
Fig. 2 is a schematic view of the structure of the retaining device.
Fig. 3 is a schematic structural view between the main push-pull column and the fixing bracket.
FIG. 4 is a schematic view of the support bracket.
Fig. 5 is a schematic view of the construction of the secondary plate on the secondary barrier slat.
Detailed Description
The invention will now be described in further detail with reference to an embodiment of a retaining system for use in the method according to the invention.
In the specific implementation: as shown in fig. 1, a debris flow retaining system comprises a retaining device arranged at the downstream of a debris flow channel and a main drainage channel 9 dug along the debris flow channel, wherein a closed cover plate is arranged on the main drainage channel 9 and penetrates through the lower part of the retaining device; a drainage branch channel 10 dug along the width direction of the debris flow channel is further arranged in the debris flow channel at the upstream of the retaining device, one end of the drainage branch channel 10 is communicated with the drainage main channel 9, and the other end of the drainage branch channel inclines towards the upstream direction of the debris flow channel; the upper cover of the drainage branch channel 10 is provided with a water filtering plate with drainage holes, and a plurality of water filtering plates are distributed from the upstream to the downstream of the debris flow channel. The main drainage channel 9 extends along the center line of the debris flow channel, and the branch drainage channels 10 are distributed on two sides of the main drainage channel 9.
In this embodiment, a low blocking dam 11 is further provided in the debris flow channel at the upstream of the blocking device along the width direction of the debris flow channel, the height of the low blocking dam 11 is 0.5-1.2 m, and a plurality of low blocking dams are distributed from the upstream to the downstream of the debris flow channel. The blocking low dams 11 are arranged in one-to-one correspondence with the drainage branch channels 10, and the blocking low dams 11 are located in the upstream direction of the corresponding drainage branch channels 10.
Once the debris flow or flood flows through the retaining low dam, the water flow or debris flow falls from a high water level, and due to the fall, the water flow washes down and forms a reaction force with water in the next section, so that the water flow generates huge disturbance, and a vortex of rolling disturbance is formed in the region where the drainage branch channel is located, thereby avoiding the blockage caused by the accumulation of silt in the drainage branch channel and ensuring the drainage capacity of the drainage branch channel. In addition, the drainage branch channel is obliquely arranged in the width direction of the debris flow channel, the retaining short dam is corresponding to the drainage branch channel and is also obliquely arranged, and after the upstream debris flow impacts the retaining short dam, the component force of the impact force can discharge the force along the oblique direction of the retaining short dam, so that the reliability of the retaining short dam is improved.
In addition, in the present embodiment, in order to make the rainwater without the debris flow better gather in the main drainage channel, the cover plate of the main drainage channel 9 has water passing holes penetrating therethrough, and the water passing holes are arranged in groups in the area between two adjacent low retaining dams 11. In case of debris flow, the water passing holes can not meet the through-flow requirement of the debris flow and can be blocked by the debris flow rapidly, so that the debris flow is prevented from flowing into the drainage main channel, and the main channel is prevented from being blocked. And water in the silt can permeate into the main drainage channel through the water through holes.
In order to allow water in the debris flow stopped by the low dam 11 to be discharged better, the lower half of the low dam 11 is provided with water permeable holes (not shown) having a diameter of 2cm to 10 cm. In addition, when not encountering debris flow, rainwater can flow into the main drainage channel 9 from the branch drainage channel 10 through the permeable holes below the retaining low dam to realize water flow diversion.
One end of the low blocking dam 11 is connected with the side wall of the debris flow channel, and the other end of the low blocking dam forms an open circulation area; the circulation areas of two adjacent low retaining dams 11 are sequentially arranged in a staggered mode from the upstream to the downstream of the debris flow channel. In this embodiment, the blocking short dam extends to the drainage main channel because the blocking main channel is arranged along the center line of the debris flow channel. In order to better pass through the blocking low dam, the distance between two adjacent blocking low dams is 80-100 m.
Meanwhile, in the embodiment, the blocking device comprises at least two fixing supports 1 which are arranged at intervals along the width direction of the trench bottom, and the distance between every two adjacent fixing supports 1 is larger than the width of the dredging equipment; the middle part of the fixed support 1 is provided with a guide hole which is arranged in a penetrating way along the length direction of the ditch bottom, a main push-pull column 2 is arranged in a penetrating way in a sliding way, one end, facing the upstream, of the main push-pull column 2 extends upwards and is provided with an auxiliary baffle plate 3, the auxiliary baffle plates 3 are arranged along the width direction of the ditch bottom, and a channel for dredging equipment to pass through is arranged between every two adjacent auxiliary baffle plates 3; one side of the fixed support 1 facing the downstream is provided with a vertically arranged rotating shaft, and the rotating shaft is positioned at the position of the fixed support 1 far away from the guide hole; a main baffle plate 5 is rotatably arranged on the rotating shaft, one end of the main baffle plate 5, far away from the rotating shaft, faces to the downstream direction and deflects to the middle part of a valley, and a channel for pedestrians or livestock to pass through is arranged between every two adjacent main baffle plates 5; an auxiliary push-pull column 6 is hinged between one end, facing the downstream, of the main push-pull column 2 and the main baffle 5, and an included angle between the auxiliary push-pull column 6 and the main push-pull column 2 is an obtuse angle, so that the main baffle 5 can be pushed by the auxiliary push-pull column 6 to rotate towards the upstream and be closed in the process that the main push-pull column 2 slides towards the downstream.
Once meeting the heavy rain, a part of rainwater flows into the drainage branch channel through the drainage holes of the water filtering plates and is gathered into the drainage main channel, so that the phenomenon that the heavy rain is excessively accumulated in solid accumulated substances in a channel bed to cause the increase of the water content of the solid accumulated substances to form debris flow is avoided or delayed. On the other hand, once part of solid accumulated substances primarily form a debris flow due to the increase of the water content and move downstream, when the debris flow passes through the low blocking dam, part of the debris flow flows in a zigzag shape along the low blocking dam in the width direction of the debris flow channel, and the downward flowing speed of the debris flow is reduced. The other part of debris flow overflows the low blocking dam and overflows, and the debris flow falls down the low blocking dam due to the too high water level of the debris flow, and then impacts at the rear of the low blocking dam to form a reaction force, so that a turbulent flow is formed in the region where the drainage branch channel is located, sediment is prevented from accumulating in the drainage branch channel, and the smoothness of the drainage branch channel is ensured. After the blocking of the low dam and the drainage of the drainage branch channel and the drainage main channel, the flow velocity and the weight of the debris flow are reduced and reach the blocking device.
The debris flow is mingled with silt and down from the upper reaches, strikes vice baffle earlier, because vice baffle installation is on main push-and-pull post, and the main one end of push-and-pull post towards the upper reaches upwards extends, and vice baffle and the fixed bolster between have the migration interval promptly, vice baffle is under the debris flow impact, promotes main push-and-pull post and moves towards the low reaches to the vice push-and-pull post through articulated setting promotes main baffle and rotates towards the upstream direction and close, realizes blocking to the debris flow.
After the debris flow stops, dredging is carried out in the upstream direction from the downstream, when the debris flow reaches the fixed supports, firstly, deposits facing the downstream side of the main retaining plate are cleared away, then the hinge structures between the auxiliary push-pull columns and the main retaining plate or the main push-pull columns are dismantled, the main retaining plate can be opened in a rotating mode facing the downstream direction, and due to the fact that the distance between two adjacent fixed supports is larger than the width of dredging equipment, the completely opened main retaining plate can be used for the dredging equipment to pass through, and dredging operation is carried out continuously in the upstream through the circulation area of two adjacent retaining short walls.
After the dredging operation is completed, the auxiliary push-pull column can be connected with the main push-pull column and the main baffle again, the main baffle, the auxiliary baffle and the main push-pull column are restored to the original state, the next blocking can be carried out, and the recycling is realized. Meanwhile, pedestrians or livestock can pass through the passage between the main blocking plates, and production and life are not affected.
In order to avoid the damage caused by the impact of the secondary barrier 3 on the fixed support under the impact of the debris flow, the fixed support 1 is provided with an elastic buffer mechanism which is arranged opposite to the secondary barrier 3, wherein the elastic buffer device can be a spring or an anti-collision rubber plate.
Because a channel for dredging equipment to pass through is arranged between every two adjacent auxiliary blocking plates, namely the area of each auxiliary blocking plate is small, a large amount of debris flow can flow to the downstream through the channel between every two adjacent auxiliary blocking plates after the debris flow explodes. And then the main baffle can bear larger reverse impact force, so that the closing of the main baffle is blocked. For this purpose, in the present embodiment, the main barrier 5 comprises a plurality of main barrier slats 51 arranged side by side in the vertical direction; the auxiliary baffle 3 comprises a plurality of auxiliary baffle strips 31 which are sequentially arranged side by side along the vertical direction, and the auxiliary baffle strips 31 are arranged in one-to-one correspondence with the main baffle strips 51.
By adopting the improved structure, the auxiliary baffle and the main baffle are respectively arranged into a plurality of auxiliary baffle strips and main baffle strips, so that the auxiliary baffle strips and the main baffle strips positioned above can still be continuously closed under the condition that the auxiliary baffle strips and the main baffle strips positioned below cannot be closed under the action of debris flow. In addition, when a fluid such as debris flow encounters an obstacle upstream, the liquid level of the fluid rises, and after the fluid passes through the obstacle, the liquid level of the fluid relatively drops. By utilizing the characteristic, for the main retaining strip and the auxiliary retaining strip which are at the same height and at the same height, the upstream auxiliary retaining strip blocks the debris flow, the liquid level of the debris flow can rise in front of the auxiliary retaining plate so as to impact the auxiliary retaining plate by a larger area, once the debris flow continues to flow towards the main retaining plate through the position of the auxiliary retaining plate, the liquid level of the debris flow can be reduced, and the debris flow can only partially or even can not contact with the main retaining strip, so that the main retaining strip can be closed more easily.
Of any two adjacent sub-barrier strips 31, the lower sub-barrier strip 31 is provided with a one-way stopper mechanism 32, so that the upper sub-barrier strip can move only in the downstream direction with respect to the lower sub-barrier strip. Specifically, as shown in fig. 3, the one-way limiting mechanism 32 is a limiting baffle formed by extending the upper end of the secondary barrier strip 31 upward, and the limiting baffle is located on the upstream side of the secondary barrier strip 31.
Therefore, when the lower auxiliary baffle plate strip is impacted by debris flow, the lower auxiliary baffle plate strip can sequentially drive the upper auxiliary baffle plate strip to move simultaneously, and all the main baffle plate strips are closed. And once the auxiliary retaining strip and the main retaining strip which are positioned below are hindered by debris flow, the debris flow is continuously accumulated and rises, the auxiliary retaining strip positioned above can still drive the main retaining strip to be continuously closed under the impact of the debris flow, and the blocking of the debris flow is realized. To the below completely rotate to the main barricade lath of the state of blocking, on the one hand because the piling up of mud-rock flow self can block the passageway that does not block, on the other hand, even the mud-rock flow of below can continue to flow through, also can weaken the destructive power of mud-rock flow greatly, play the prevention and cure effect, can also reduce the pressure of blocking the device.
Since the auxiliary barrier lath 31 is impacted by the debris flow to push the main barrier lath 51, the larger the area of the auxiliary barrier lath 31 impacted by the debris flow is, the larger the impact force of the debris flow is, and the better the auxiliary barrier lath 31 can push the main barrier lath 51. Therefore, in this embodiment, the following structure is further adopted: as shown in fig. 5, in any two adjacent auxiliary barrier slats 31, two sides of the upper auxiliary barrier slat 31 in the width direction are respectively hinged with one auxiliary board 33, the two auxiliary boards 33 are folded toward the upstream direction of the debris flow channel in a splayed manner, the one-way limiting mechanism 32 is located between the two auxiliary boards 33, and the minimum distance between the two auxiliary boards 33 is smaller than the width of the one-way limiting mechanism 32. Thus, when the lower auxiliary baffle plate strip 31 is impacted by debris flow and slides downstream, the one-way limiting mechanism 32 can simultaneously push the two auxiliary plates to open the two auxiliary plates, and then continuously push the upper auxiliary baffle plate strip 31 to move, and after the auxiliary plates are opened, the impacted area of the upper auxiliary baffle plate strip 31 is increased, so that the main baffle plate strip 51 can be better pushed to close.
In implementation, when the auxiliary baffle 3 is in contact with the fixed support 1, the included angle between the main push-pull column 2 and the auxiliary push-pull column 6 is 85-90 °. Once the auxiliary blocking plate is in contact with the fixed support, the main blocking plate is closed in place, the angle between the main push-pull column and the auxiliary push-pull column is an acute angle, and the main blocking plate cannot reversely push the main push-pull column under the action of debris flow.
As shown in fig. 2, in this embodiment, a plurality of fixing brackets 1 are arranged at intervals along the width direction of the trench bottom, and one side of the fixing bracket 1, which faces downstream, in the middle of the trench bottom is provided with two rotating shafts and two main baffles 5, one end, which faces downstream, of each main push-pull column 2 is hinged with two auxiliary push-pull columns 6, and the other end of each auxiliary push-pull column 6 is hinged with the corresponding main baffle 5.
In this embodiment, the guiding hole is a square hole, and the main push-pull column 2 is a square column. The guide holes are internally provided with a plurality of guide wheels which are uniformly distributed along the length direction, and the guide wheels are rotatably arranged at the bottoms of the guide holes through hinge shafts arranged along the width direction of the guide holes; the main push-pull column 2 is supported on a plurality of guide wheels. The main push-pull column is supported by the rotatable guide wheels, so that the main push-pull column can move more smoothly in the guide hole, the resistance between the main push-pull column and the guide hole is reduced as much as possible, and the impact force of debris flow acting on the auxiliary blocking plate is applied to the auxiliary push-pull column and the main blocking plate as much as possible, so that the upper main blocking plate is closed more smoothly to form blocking.
Because the guiding hole is poured on the fixed bolster integratively, if with the leading wheel assemble in advance on the framework of steel reinforcement, can influence the leading wheel precision after pouring on the one hand, also can have on the other hand that partial concrete flows into on the rotating member of leading wheel, influence the smooth and easy nature of rotation of leading wheel. For this purpose, in the present embodiment, as shown in fig. 4, a support bracket 8 is inserted into the guide hole, the length of the support bracket 8 is the same as that of the guide hole, and two ends of the support bracket 8 are mounted on the fixed bracket 1 through a fixed plate 4; the fixing plate 4 is provided with a yielding hole for the main push-pull column 2 to pass through; the guide wheel 81 is arranged on the support bracket 8. Through wear to establish support bracket 8 in the guiding hole to set up the leading wheel on support bracket, both can guarantee the precision of leading wheel, can also guarantee that the leading wheel rotates smoothly. Meanwhile, the fixing plates at two ends are arranged on the fixing support, and the process is simple and reliable.
In addition, in order to further reduce the moving resistance of the main push-pull column, the closing reliability of the main baffle is improved. The two sides of the support bracket 8 are provided with side frames which are vertically arranged, rotatable auxiliary guide wheels 82 are vertically arranged on the side frames, and the space between the auxiliary guide wheels 82 on the side frames on the two sides is matched with the width of the main push-pull column 2.
Considering that the main baffle is impacted by debris flow, the main baffle is prevented from being closed and can be pushed towards the opening direction, so that the blocking failure caused by the debris flow rushing away from the main baffle can be avoided. In this embodiment, still adopted reverse auto-lock structure, specifically do: the top of the main push-pull column 2 is provided with a plurality of protruding locking teeth 21, one side of the locking teeth 21 facing the downstream is an inclined guide surface 22, the other side is a vertical locking surface, and the locking teeth 21 are uniformly distributed along the length direction of the main push-pull column 2; a locking baffle 7 arranged corresponding to the guide hole is arranged on one downstream side of the fixed support 1, the locking baffle 7 is positioned right above the guide hole, and the upper end of the locking baffle 7 is hinged on the fixed support 1; the lower end of the locking baffle 7 is positioned in the area between the top and the root of the locking tooth.
Like this, vice baffle that blocks pushes away under the effect of mud-rock flow and draws the post and move downstream in the guiding hole, and when the lock tooth was through the locking baffle position, the lower extreme that promotes the locking baffle swings to the downstream direction, in case the lock tooth passes through the locking baffle position, the locking baffle resumes vertical state under self action of gravity to keep off the locking face department at the lock tooth, thereby can avoid main baffle to block the reverse main push-pull post of baffle under the effect of mud-rock flow and push away upstream.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (8)
1. A compound prevention and control method of mud-rock flow, characterized by, before preventing and controlling, set up the following structural shunting type retaining system in the gully of the area of prevention and control of mud-rock flow first, including the retaining device set up in the downstream of the mud-rock flow channel and drainage main canal (9) dug along the mud-rock flow channel, there are closed cover plates on the said drainage main canal (9), and pass the below of the said retaining device; a drainage branch channel (10) dug along the width direction of the debris flow channel is further arranged in the debris flow channel at the upstream of the retaining device, one end of the drainage branch channel (10) is communicated with the drainage main channel (9), and the other end of the drainage branch channel inclines towards the upstream direction of the debris flow channel; the upper cover of the drainage branch channel (10) is provided with a water filtering plate with drainage holes, and a plurality of water filtering plates are distributed from the upstream to the downstream of the debris flow channel.
2. A composite control method of debris flow according to claim 1, characterized in that the main drainage channel (9) is extended along the center line of the debris flow channel, and the branch drainage channels (10) are distributed on both sides of the main drainage channel (9).
3. A composite control method for debris flow according to claim 1, characterized in that a low retaining dam (11) is provided in the debris flow channel upstream of the retaining means and in the width direction of the debris flow channel, and a plurality of low retaining dams (11) are provided downstream from the upstream of the debris flow channel.
4. A composite control method of a mud-rock flow according to claim 3, characterized in that said low retaining dams (11) are arranged in one-to-one correspondence with said drainage branch canals (10), said low retaining dams (11) being located in the upstream direction of the corresponding drainage branch canals (10).
5. A composite control method of a debris flow according to claim 3, wherein one end of the retaining low dam (11) is connected to a side wall of the debris flow channel, and the other end forms an open circulation area; the circulation areas of two adjacent low retaining dams (11) are sequentially arranged in a staggered mode from the upstream to the downstream of the debris flow channel.
6. A composite control method of debris flow according to claim 3, wherein the height of the barrage (11) is 0.5 to 1.2 m.
7. The composite control method of debris flow according to claim 4, characterized in that the lower half of the retaining low dam (11) is provided with water permeable holes having a diameter of 2cm to 10 cm.
8. A composite control method for debris flow according to claim 1, wherein the retaining device comprises at least two fixed brackets (1) arranged at intervals along the width direction of the trench bottom, and the distance between two adjacent fixed brackets (1) is larger than the width of the dredging equipment; the middle part of the fixed support (1) is provided with a guide hole which is arranged in a penetrating way along the length direction of the ditch bottom, a main push-pull column (2) is arranged in a penetrating way in a sliding way, one end, facing the upstream, of the main push-pull column (2) extends upwards and is provided with an auxiliary baffle plate (3), the auxiliary baffle plate (3) is arranged along the width direction of the ditch bottom, and a channel for dredging equipment to pass through is arranged between every two adjacent auxiliary baffle plates (3); one side of the fixed support (1) facing the downstream is provided with a vertically arranged rotating shaft, and the rotating shaft is positioned at the position, far away from the guide hole, of the fixed support (1); the rotating shaft is rotatably provided with main baffle plates (5), one end of each main baffle plate (5) far away from the rotating shaft faces to the downstream direction and deflects towards the middle of a valley, and a channel for pedestrians or livestock to pass through is formed between every two adjacent main baffle plates (5); an auxiliary push-pull column (6) is hinged between one end, facing the downstream, of the main push-pull column (2) and the main baffle plate (5), and an included angle between the auxiliary push-pull column (6) and the main push-pull column (2) is an obtuse angle, so that the main baffle plate (5) can be pushed by the auxiliary push-pull column (6) to rotate and close towards the upstream in the downstream sliding process of the main push-pull column (2).
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| CN202211484833.0A CN115897476B (en) | 2022-11-25 | Composite prevention and treatment method for debris flow |
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| CN202211484833.0A CN115897476B (en) | 2022-11-25 | Composite prevention and treatment method for debris flow |
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| CN115897476A true CN115897476A (en) | 2023-04-04 |
| CN115897476B CN115897476B (en) | 2024-08-02 |
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