CN118292404A - Debris flow blocking dredging method - Google Patents

Abstract

The invention discloses a debris flow blocking and dredging method, which is characterized in that a lower lying gate is designed at the lower part of a gate position in the middle of a blocking dam, and the lower lying gate is turned outwards to open and dredge from the position when debris flows through the debris flow dredging. Therefore, the invention can better realize the stable blocking of the debris flow, and is beneficial to dredging treatment and timely recovery of the blocking function after the debris flow.

Description

Debris flow blocking dredging method

Technical Field

The invention relates to the technical field of debris flow treatment engineering, in particular to a debris flow blocking and dredging method.

Background

The debris flow is one of the common geological disasters in mountain areas, is usually induced by factors such as heavy rainfall, ice and snow melting, breaking and the like, has great threat to life and property safety and ecological safety of people, and needs to carry out engineering treatment on channels with hidden danger of the debris flow. Wherein, the flexible protection form represented by the protection net and the rigid blocking dam represented by the blocking dam are common engineering management forms at present.

For example, CN202410338635.6 discloses a flexible blocking protection structure suitable for brae debris flow and high-order collapse falling stones, including blocking the protection network, block the protection network including being used for blocking the upper portion that high-order collapse falling stones and block the protection network structure and be used for intercepting the lower part of valley debris flow material and block the protection network structure, the lower part is blocked the protection network structure both sides and is connected with the valley through climbing roof beam, the upper portion is blocked the protection network structure middle part and is connected through the supporting pile, the supporting pile side is connected with the mountain through the anchor rope, the upper portion protection network both sides are connected with brae domatic through the earth beam. The blocking protective net comprises a plurality of flexible transverse steel strands and flexible vertical steel strands which are arranged in a perpendicular and crossed mode. The blocking protection net is used for blocking and protecting debris flow and high-level collapse rocks, and has the advantages of high protection height, large energy level, low cost, strong toughness and easy maintenance.

Also such as a flexible water permeable debris flow dam disclosed in CN 202010147197.7; CN201922126110.3 discloses a blocking dam structure for preventing mountain debris flow impact, CN202021769470.1 discloses an anchoring type debris flow blocking dam, etc. The rigid blocking dam is adopted to realize forced blocking and blocking of the debris flow, so that public safety hazard caused by the debris flow in a downstream accumulation area after the debris flow rushes out of the channel is avoided. However, the existing debris flow treatment technologies are all singly considered to intercept and block, so that a blocking structure is easy to break when the debris flow impact force is large, and the debris flow treatment effect is limited. Meanwhile, most of existing blocking projects are insufficient in dredging consideration, and the blocking function is not convenient to recover in time for repeated use after debris flow occurs.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to solve the technical problems that: how to provide a mud-rock flow blocking and dredging method which can better realize the stable blocking of mud-rock flow and is beneficial to dredging treatment after mud-rock flow and timely recovering the blocking function.

In order to solve the technical problems, the invention adopts the following technical scheme:

A mud-rock flow blocking and dredging method is characterized in that a lower lying gate which is turned outwards is designed at the lower part of a gate position in the middle of a mud-rock flow blocking dam, and when mud-rock flows through and is dredged, the lower lying gate is turned outwards to open and dredge from the position.

Therefore, the conventional debris flow blocking dam usually uses the upward sliding gate, and the two sides of the upward sliding gate are embedded in the sliding grooves at the two sides of the gate, so that the upward sliding gate can bear larger impact pressure. However, after the debris flow is generated and blocked, the blocked soil is accumulated on the upstream side of the blocking dam, resulting in the sliding door shutter being subjected to a very large compressive stress and deformed. In this state, it is difficult to open the pull-up gate by a normal control method, so that the dredging work and inconvenience thereof are caused. Therefore, in the scheme, the lower part of the gate is innovatively designed as a lying gate. When the debris flow is needed to be dredged, the lower lying gate can be controlled to be turned over to be opened downwards, dredging is achieved forwards from the opening position of the lower lying gate, and after the lower silt is cleaned, the upper silt naturally collapses downwards until the silt on the upstream side of the upper sliding gate is emptied, so that the lifting operation of the upper sliding gate is not affected. Therefore, dredging work can be completed more quickly and efficiently.

Further, the method is realized by adopting the debris flow blocking device, the debris flow blocking device comprises a blocking dam fixedly arranged in a debris flow channel along the width direction, a gate opening downwards is arranged at the middle position of the blocking dam, and a gate is further arranged in the gate.

In the mud-rock flow blocking device, the upper gate in the gate is a pull-up gate, and the lower gate is designed at the lower part of the gate. The upper sliding door gate can bear larger impact force. Meanwhile, for the lower lying gate, the lower position is subjected to the friction and viscous force action of the surface of a channel when the debris flow advances, so that the impact force of the lower part is smaller, and the diversion dike is arranged in front of the blocking dam gate for blocking and diversion in the follow-up process, so that the impact force of the lower lying gate is smaller, and the lower lying gate is still stable after being subjected to impact when the debris flow occurs. Therefore, the gate structure has the advantages of not only being capable of having enough stability to bear impact when the debris flow is generated, but also being capable of conveniently performing dredging operation after the debris flow is generated and improving dredging efficiency.

Further, the gate lifting control device comprises a support frame which is arranged on a blocking dam above the gate in a portal frame structure, a lifting machine is arranged on the support frame, the lifting machine further comprises a lifting screw rod vertically arranged at the upper end of the upper sliding gate, the upper sliding gate is hung at the lower end of the lifting screw rod and rotatably arranged between the lower end of the lifting screw rod and the lower end of the lifting gate, the lifting machine comprises a lifting motor and a lifting nut which is horizontally arranged, the lifting motor is in transmission connection with the lifting nut, and the lifting nut is limited on the support frame up and down and is in threaded fit with the lifting screw rod.

Therefore, the lifting nut and the lifting screw rod in the lifter are matched to form a screw nut transmission pair structure, and the lifting operation control of the upward-pulling door gate can be conveniently controlled through the lifter.

Further, the gate overturning device comprises a telescopic cylinder device positioned on the downstream side of the lower lying gate, the upper end of the telescopic cylinder device is hinged with the surface of the downstream side of the lower lying gate, and the lower end of the telescopic cylinder device is hinged on a dam foundation at the downstream end of the gate.

Therefore, the door lock can be turned over and opened backward conveniently through the telescopic control of the telescopic cylinder.

Further, the telescopic cylinder device is a hydraulic cylinder telescopic device. This provides greater stability and support.

Further, a gate groove matched with the lower lying gate is further formed in the dam foundation on the downstream side of the lower lying gate, and the telescopic cylinder device is arranged in the gate groove and enables the lower lying gate to fall into the gate groove after being turned backwards and opened.

Therefore, after the lower lying gate is turned backwards and opened, the entrance of the transport vehicle is not influenced, and dredging operation is more convenient.

Further, a diversion dike is arranged in the upstream side debris flow channel opposite to the gate at a distance from the blocking dam.

Therefore, after the debris flow continuously flows forwards through the debris flow blocking dam, the debris flow firstly impacts the diversion dike to dissipate energy and is diverted to two sides, and the diverted debris flow can impact two sides of the blocking dam, so that the energy is better dissipated, the situation that the gate of the blocking dam is directly impacted by the debris flow is avoided, and the safety and stability of the gate are better protected.

Further, the whole diversion dike is in a strip shape along the direction of the debris flow channel.

Therefore, the diversion dike can bear impact better, and the stability of the diversion dike is ensured better.

Further, the upstream end of the dividing wall is curved forward.

In this way, the shunt effect can be better achieved.

Further, a diversion dike pressing plate is fixedly arranged at the bottom of the upstream end of the diversion dike in a forward extending mode along the bottom of the debris flow channel.

Therefore, mud-rock flow collides with the diversion dike and is firstly pressed on the diversion dike pressing plate, so that the stability of the structure of the diversion dike is better ensured.

Further, the two sides of the retaining dam are connected with the side wall of the debris flow channel to form a waistcoat in an upward protruding mode, and the outer side of the waistcoat is embedded and fixed on the side wall of the debris flow channel.

Thus, the stability of the blocking dam is better ensured.

Further, the mud-rock flow blocking front bottom filtering system is further arranged on the upstream side of the blocking dam, the mud-rock flow blocking front bottom filtering system comprises a filtering bottom grid arranged at the bottom of a mud-rock flow channel positioned at the position adjacent to the upstream side of a gate of the blocking dam, the filtering bottom grid is communicated with an underdrain below the filtering bottom grid, and the underdrain extends to the outer side of the downstream end of the blocking dam in the downstream direction.

Therefore, when the gate is put down before the debris flow comes, after the debris flow is intercepted and blocked by the blocking dam, the water contained in the debris flow can flow downwards into the underdrain through the filter bottom gate and flow to the lower part of the blocking dam, so that mud-water separation is well realized. After the debris flow stops, the soil part substances intercepted by the blocking dam can open the gate to perform dredging, so that the blocking dam can recover the intercepting function again. Therefore, the mud-rock flow blocking and diverting device has the advantages of good mud-rock flow blocking and diverting effect, convenience for dredging operation after mud-rock flow and the like.

Further, the mud-rock flow blocking front bottom filtering system further comprises a mud-rock flow pre-filtering mud-water separation structure arranged in a mud-rock flow channel at the upstream end of the blocking dam, the mud-rock flow pre-filtering mud-water separation structure comprises filtering sedimentation grooves arranged on two sides of the bottom of the mud-rock flow channel, the whole cross section of the bottom of the filtering sedimentation grooves is in a V shape matched with the mud-rock flow channel, a gabion is arranged in the filtering sedimentation grooves to form a filtering structure, blind ditches are downwards arranged at the joint parts of the filtering sedimentation grooves on the two sides, and an underdrain which is forwards along the mud-rock flow channel is formed.

Therefore, after the debris flow enters the gabion, the moisture in the debris flow can be filtered downwards through the gabion to the lower filtering sink groove and converged into the blind ditch, and flows downwards along the underdrain; the water turns downwards in the gabion and collides with the gabion to eliminate kinetic energy, so that the flow rate in the underdrain is slowed down, and the smooth flow is ensured. Meanwhile, after the debris flow above the gabion loses most of water, the kinetic energy is reduced, the water content is greatly reduced, and the back is more beneficial to stably intercepting the sand part in the debris flow.

Further, the bottom of the filtering sink is provided with a concrete cushion layer and forms a water collecting inclined plane.

Thus, the effectiveness and stability of the catchment are more favorably ensured.

Further, a water collecting structure is arranged on the water collecting inclined surface and comprises a water collecting main groove which is obliquely arranged downwards and forwards, the lower end of the water collecting main groove is connected with the underdrain, and the water collecting main groove is provided with a plurality of water collecting grooves and is arranged at intervals along the upstream direction and the downstream direction.

Therefore, after water in the debris flow passes through the gabion downwards, the water can be collected and flows into the underdrain more quickly and efficiently by virtue of the water collecting main groove, the filtering efficiency of the filtering structure is improved, and the upper surface of the gabion has a better downward water absorption and filtering effect.

Further, the downstream side of the main water collecting groove is a vertical plane, and the upstream side is an inclined plane or an arc-shaped surface.

Therefore, under the impact force of the debris flow, the inclination of the water flow direction on the catchment inclined plane is smaller than that of the catchment main groove, so that the downstream side of the catchment main groove is easy to be impacted by the water flow in the downward direction, the downstream side is designed to be a vertical plane, the water flow can be better prevented from flowing downwards beyond the downstream side, the catchment effect of the catchment main groove is better ensured, meanwhile, the flow speed of the water flow can be slowed down, the energy is dissipated, and the water flow in the underdrain is ensured to be more stable and mild. In practice, the draft angle of the main sump is typically between 45-90 degrees.

Further, the upstream side of each water collecting main groove is also connected with a plurality of water collecting branch grooves which are arranged at intervals, and the lower ends of the water collecting branch grooves are arranged forwards in an inclined mode and the inclination of the water collecting branch grooves is smaller than that of the water collecting main grooves.

Like this, catchment branch groove and catchment main tank distribute in the catchment inclined plane, have further improved its catchment diversion effect, have improved filtration's filter effect. In practice, the catchment leg is typically between 0 and 45 degrees.

Further, each catchment branch groove is arc or triangle-shaped of bilateral symmetry. Because the inclination of the catchment branch groove is smaller, the length direction of the catchment branch groove is basically consistent with the resultant force direction of water flow, and the symmetrical arc or triangle is designed to be more beneficial to catchment.

Further, a baffle ridge is arranged upwards at the side edge of the downstream side of the filtering sink groove, and the upper end of the baffle ridge exceeds the upper surface of the gabion by a distance (usually 30-100 cm).

The blocking ridge at the position can block the gabion, so that the stability of the filtering structure is better ensured; meanwhile, the blocking ridge at the position blocks the mud-rock flow to act on the lower part of the mud-rock flow, so that the blocking of water flow is realized, and the filtering effect of the filtering structure is better ensured; in addition, after the debris flow filtered out of most of water hits the blocking ridge, the secondary energy dissipation can be realized, and the stable interception is facilitated to be realized subsequently.

Further, the lower end of the baffle ridge and the concrete cushion layer of the catchment inclined plane are poured into a whole.

Therefore, the self weight of the gabion presses the concrete cushion layer to pull the blocking ridge, so that the blocking ridge is prevented from tipping backwards under strong impact, and the stability of the self structure of the gabion is better ensured.

Further, the gabions in the filtering sink grooves are arranged in rows along the width direction, and the upper surface of each row of gabions is arranged in a concave arc shape with the downstream side higher than the upstream side.

Therefore, a plurality of arc-shaped surfaces facing water are formed on the upper surface of the gabion, the arc-shaped surfaces can better bear the impact of the debris flow, the contact area of the impact is increased, the water flow can enter the gabion forcibly and permeate downwards, and the water filtering effect is improved; meanwhile, the debris flow can repeatedly jump up and down under the repeated impact and lifting actions of the water-facing arc surface, so that energy dissipation is greatly realized, the flow speed is reduced, the water filtering effect of the gabion on the debris flow is further improved after the flow speed is reduced, and the water content of the follow-up debris flow is reduced.

Further, mud-rock flow interception net devices are further arranged in mud-rock flow channels at the upstream end of the mud-rock flow pre-filtering mud-water separation structure, the mud-rock flow interception net devices comprise interception nets arranged along the inner cross section direction of the mud-rock flow channels, two sides below the interception nets are downwards fixed at the bottoms of the mud-rock flow channels, two sides above the interception nets are respectively fixed on side slopes at two sides of the mud-rock flow channels in an inclined mode through upper inhaul cables, and detachable connecting devices are further arranged on the upper inhaul cables.

Thus, when the debris flow arrives, the large-size solid objects mixed in the debris flow can be intercepted and separated through the interception net; after mud-rock flows, conveniently dismantle upper portion cable through dismantling connecting device, loosen the interception net to the clearance interception material makes it resume the interception function.

Further, the lower inhaul cable which is obliquely downward is connected to the outer lower parts of the two sides below the interception net, and the lower end of the lower inhaul cable is connected to the lower anchoring parts of the two sides of the bottom of the debris flow channel.

Therefore, the fixing of the lower part of the interception net is conveniently realized, and when the interception net is detached, only the upper stay rope above the interception net is required to be detached, so that dredging is convenient.

Further, detachable connecting device includes a pair of ears link and the connection journal stirrup of mutually supporting, and ears link fixed connection is on mud-rock flow interception net top side or correspond the anchor setting on the upper portion anchor assembly of anchor above mud-rock flow channel side slope, and the tip at upper portion cable is fixed to the connection journal stirrup, relies on detachable pin to realize fixed connection after the cooperation between ears link and the connection journal stirrup.

Therefore, the device has the characteristics of simple structure, convenient connection and low cost.

Further, both ends of the upper inhaul cable are provided with detachable connecting devices.

Therefore, the disassembly of the whole upper inhaul cable can be conveniently realized.

Further, a set of auxiliary dismounting mechanism is arranged at the position of the upper guy cable on at least one side in parallel, the auxiliary dismounting mechanism comprises an auxiliary guy cable, the lower end of the auxiliary guy cable is connected to the connecting position of the lower end of the corresponding upper guy cable, the upper end of the auxiliary guy cable is connected to the upper anchoring piece connected to the upper end of the corresponding upper guy cable, the middle position of the auxiliary guy cable is disconnected, a set of detachable connecting devices are arranged on the upper side and the lower side of the disconnecting position, and a two-way oil cylinder mounting station is formed between the two sets of detachable connecting devices at the middle disconnecting position of the auxiliary guy cable.

Therefore, after the debris flow interception is realized, the interception net is blocked by the debris flow material, so that a great pulling force can be formed on the upper inhaul cable, the detachable connecting device at the end part of the upper inhaul cable can not be easily detached in a stressed state, and meanwhile, the inhaul cable can easily fly to cause a safety accident under the action of stress during detachment. Therefore, the auxiliary dismounting mechanism is arranged on the upper inhaul cable on one side in parallel, and when dismounting is needed, one bidirectional oil cylinder is firstly mounted on the bidirectional oil cylinder mounting station on the auxiliary inhaul cable, and the length direction of the bidirectional oil cylinder is adjustable. Therefore, the auxiliary inhaul cable can be tensioned by shortening the length of the bidirectional oil cylinder, so that the corresponding parallel upper inhaul cables are converted from a tightening state to a loosening state, and the upper inhaul cables can be easily and safely disassembled. And then the bidirectional oil cylinder is extended, so that the auxiliary inhaul cable is loosened, and self-disassembly is completed. The detachable connection device on the auxiliary inhaul cable at the disconnection position comprises a double-lug hanging ring fixed at the disconnection position of the auxiliary inhaul cable, a connection supporting lug fixed at one end of the bidirectional oil cylinder and a pin which is detachably connected between the double-lug hanging ring and the connection supporting lug; simple structure, convenient assembly and disassembly and safe and reliable use.

Further, the lower end of the auxiliary stay rope is connected with the interception net through a set of detachable connecting device, and the upper end of the auxiliary stay rope is connected with the corresponding upper anchoring piece through a set of detachable connecting device.

Therefore, the auxiliary stay rope can be detached, and is installed and used when needed.

Further, a plurality of interception nets are arranged at intervals along the front-back direction of the debris flow channel, and the meshes of the interception nets gradually decrease from the upstream end to the downstream end.

Therefore, the large-diameter substances can be better intercepted in a grading way, and the interception effect is improved. The mesh diameter of the interception net at the upstream end can be about one meter, and the interception net is mainly used for intercepting trees, and the mesh diameter of the interception net at the downstream end can be about 10-20 cm and is used for intercepting other substances with larger diameters such as falling rocks.

Therefore, the invention can better realize the stable blocking of the debris flow, and is beneficial to dredging treatment and timely recovery of the blocking function after the debris flow.

Drawings

Fig. 1 is a schematic plan view of a debris flow blocking device according to the present invention. Arrows in the figure indicate fluid flow.

Fig. 2 is a cross-sectional view of fig. 1 taken along a centerline of the debris flow channel.

Fig. 3 is a schematic view showing the construction of the single debris flow intercepting net apparatus of fig. 1.

Fig. 4 is a schematic structural view of the separate upper cable of fig. 3 and its corresponding auxiliary dismounting mechanism.

FIG. 5 is a schematic cross-sectional view of the position of the mud-water separation filter structure of the individual mud-rock flow of FIG. 1.

Fig. 6 is a schematic plan view of a water collecting slope and a water collecting structure thereof in the separate mud-rock flow mud-water separation filter structure of fig. 1.

Fig. 7 is a schematic view showing a structure of the single debris flow blocking dam of fig. 1.

Fig. 8 is a side view of fig. 7.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Best mode for carrying out the invention: a mud-rock flow blocking and dredging method is characterized in that a lower lying gate which is turned outwards is designed at the lower part of a gate position in the middle of a mud-rock flow blocking dam, and when mud-rock flows through and is dredged, the lower lying gate is turned outwards to open and dredge from the position.

Therefore, the conventional debris flow blocking dam usually uses the upward sliding gate, and the two sides of the upward sliding gate are embedded in the sliding grooves at the two sides of the gate, so that the upward sliding gate can bear larger impact pressure. However, after the debris flow is generated and blocked, the blocked soil is accumulated on the upstream side of the blocking dam, resulting in the sliding door shutter being subjected to a very large compressive stress and deformed. In this state, it is difficult to open the pull-up gate by a normal control method, so that the dredging work and inconvenience thereof are caused. Therefore, in the scheme, the lower part of the gate is innovatively designed as a lying gate. When the debris flow is needed to be dredged, the lower lying gate can be controlled to be turned over to be opened downwards, dredging is achieved forwards from the opening position of the lower lying gate, and after the lower silt is cleaned, the upper silt naturally collapses downwards until the silt on the upstream side of the upper sliding gate is emptied, so that the lifting operation of the upper sliding gate is not affected. Therefore, dredging work can be completed more quickly and efficiently.

In specific implementation, the method is realized by adopting a debris flow blocking device, referring to fig. 1-8, the debris flow blocking device comprises a blocking dam 21 fixedly arranged in a debris flow channel along the width direction, a gate opening downwards to the bottom is arranged in the middle of the blocking dam 21, a gate is also arranged in the gate, the gate comprises a lower lying gate 26 positioned at the lower part of the gate, the lower end of the lower lying gate 26 is hinged with the lower surface of the gate, the gate further comprises an upper pulling gate 27 which is opposite to the lower lying gate and is arranged at the upper position in the gate, two sides of the upper pulling gate 27 are embedded in sliding grooves at two sides of the gate in a vertical sliding manner, a gate lifting control device is arranged above the upper pulling gate, and a gate turnover device is arranged at the downstream side of the lower lying gate and is used for controlling the lower lying gate to turn backwards and open.

In the mud-rock flow blocking device, the upper gate in the gate is a pull-up gate, and the lower gate is designed at the lower part of the gate. The upper sliding door gate can bear larger impact force. Meanwhile, for the lower lying gate, the lower position is subjected to the friction and viscous force action of the surface of a channel when the debris flow advances, so that the impact force of the lower part is smaller, and the diversion dike is arranged in front of the blocking dam gate for blocking and diversion in the follow-up process, so that the impact force of the lower lying gate is smaller, and the lower lying gate is still stable after being subjected to impact when the debris flow occurs. Therefore, the gate structure has the advantages of not only being capable of having enough stability to bear impact when the debris flow is generated, but also being capable of conveniently performing dredging operation after the debris flow is generated and improving dredging efficiency.

Wherein, gate lift control device, including being the support frame 28 that portal frame structure set up on the barrage of gate top, install lift 29 on the support frame 28, still include the vertical lift screw 33 of installing in last sliding gate 27 upper end, go up sliding gate 27 and hang and connect at lift screw lower extreme and rotatable setting between the two, lift 29 includes a lift motor and the lift nut of a level setting, lift motor and lift nut transmission are connected, the lift nut by upper and lower spacing on the support frame and with lift screw thread fit.

Therefore, the lifting nut and the lifting screw rod in the lifter are matched to form a screw nut transmission pair structure, and the lifting operation control of the upward-pulling door gate can be conveniently controlled through the lifter.

The gate overturning device comprises a telescopic cylinder device 30 positioned on the downstream side of the lower lying gate, the upper end of the telescopic cylinder device 30 is hinged with the surface of the downstream side of the lower lying gate, and the lower end of the telescopic cylinder device 30 is hinged on a dam foundation at the downstream end of the gate.

Therefore, the door lock can be turned over and opened backward conveniently through the telescopic control of the telescopic cylinder.

The telescopic cylinder device 30 is a hydraulic cylinder telescopic device. This provides greater stability and support.

The dam foundation 31 on the downstream side of the lying gate is further provided with a gate groove 32 matched with the lying gate, and the telescopic cylinder device is arranged in the gate groove and enables the lying gate to fall into the gate groove 32 after being turned backwards and opened.

Therefore, after the lower lying gate is turned backwards and opened, the entrance of the transport vehicle is not influenced, and dredging operation is more convenient.

The upstream side debris flow channel opposite to the gate is also provided with a diversion dike 23 which is arranged at a distance from the blocking dam.

Therefore, after the debris flow continuously flows forwards through the debris flow blocking dam, the debris flow firstly impacts the diversion dike to dissipate energy and is diverted to two sides, and the diverted debris flow can impact two sides of the blocking dam, so that the energy is better dissipated, the situation that the gate of the blocking dam is directly impacted by the debris flow is avoided, and the safety and stability of the gate are better protected.

The diversion dike 23 is in a long strip shape along the direction of the debris flow channel.

Therefore, the diversion dike can bear impact better, and the stability of the diversion dike is ensured better. The upper end of the shunt dike is higher than the upper end of the lower lying gate during implementation, so that the stability of the lower lying gate is better ensured.

Wherein the upstream end of the dividing wall 23 is curved forward.

In this way, the shunt effect can be better achieved.

Wherein, a diversion dike pressing plate 24 is fixedly and forwardly extended along the bottom of the debris flow channel at the bottom of the upstream end of the diversion dike 23.

Therefore, mud-rock flow collides with the diversion dike and is firstly pressed on the diversion dike pressing plate, so that the stability of the structure of the diversion dike is better ensured.

Wherein, the two sides of the retaining dam 21 are connected with the side wall of the debris flow channel and are upwards protruded to form a waistcoat 25, and the outer side of the waistcoat 25 is embedded and fixed on the side wall of the debris flow channel.

Thus, the stability of the blocking dam is better ensured.

The mud-rock flow blocking front bottom filtering system is further arranged on the upstream side of the blocking dam and comprises a filtering bottom grid 22 arranged at the bottom of a mud-rock flow channel at the position adjacent to the upstream side of a gate of the blocking dam, the filtering bottom grid 22 is communicated with the underdrain 13 below, and the underdrain 13 extends to the outer side of the downstream end of the blocking dam 21 in the downstream direction.

Therefore, when the gate is put down before the debris flow comes, after the debris flow is intercepted and blocked by the blocking dam, the water contained in the debris flow can flow downwards into the underdrain through the filter bottom gate and flow to the lower part of the blocking dam, so that mud-water separation is well realized. After the debris flow stops, the soil part substances intercepted by the blocking dam can open the gate to perform dredging, so that the blocking dam can recover the intercepting function again. Therefore, the mud-rock flow blocking and diverting device has the advantages of good mud-rock flow blocking and diverting effect, convenience for dredging operation after mud-rock flow and the like.

The mud-rock flow blocking front bottom filtering system further comprises a mud-rock flow pre-filtering mud-water separation structure arranged in a mud-rock flow channel at the upstream end of the blocking dam, and referring to fig. 5-6, the mud-rock flow pre-filtering mud-water separation structure comprises filtering sedimentation grooves 11 arranged on two sides of the bottom of the mud-rock flow channel, the whole cross section of the bottom of the filtering sedimentation grooves 11 is in a V shape matched with the mud-rock flow channel, a gabion 12 is arranged in the filtering sedimentation grooves 11 to form a filtering structure, and blind ditches are downwards arranged at the joint parts of the filtering sedimentation grooves on the two sides and an underdrain 13 which is forwards along the mud-rock flow channel is formed.

Therefore, after the debris flow enters the gabion, the moisture in the debris flow can be filtered downwards through the gabion to the lower filtering sink groove and converged into the blind ditch, and flows downwards along the underdrain; the water turns downwards in the gabion and collides with the gabion to eliminate kinetic energy, so that the flow rate in the underdrain is slowed down, and the smooth flow is ensured. Meanwhile, after the debris flow above the gabion loses most of water, the kinetic energy is reduced, the water content is greatly reduced, and the back is more beneficial to stably intercepting the sand part in the debris flow.

Wherein, the bottom surface of the filtering sink 11 is provided with a concrete cushion layer 14 and forms a water collecting inclined plane.

Thus, the effectiveness and stability of the catchment are more favorably ensured.

Wherein, be provided with the catchment structure on the catchment inclined plane, the catchment structure includes the catchment main tank 15 that the slant of downward front was arranged, catchment main tank lower extreme with the underdrain meets, and catchment main tank 15 is provided with many and along the upper and lower stream direction interval arrangement.

Therefore, after water in the debris flow passes through the gabion downwards, the water can be collected and flows into the underdrain more quickly and efficiently by virtue of the water collecting main groove, the filtering efficiency of the filtering structure is improved, and the upper surface of the gabion has a better downward water absorption and filtering effect.

Wherein, the downstream side of the main water collecting groove 15 is a vertical plane, and the upstream side is an inclined plane or an arc surface.

Therefore, under the impact force of the debris flow, the inclination of the water flow direction on the catchment inclined plane is smaller than that of the catchment main groove, so that the downstream side of the catchment main groove is easy to be impacted by the water flow in the downward direction, the downstream side is designed to be a vertical plane, the water flow can be better prevented from flowing downwards beyond the downstream side, the catchment effect of the catchment main groove is better ensured, meanwhile, the flow speed of the water flow can be slowed down, the energy is dissipated, and the water flow in the underdrain is ensured to be more stable and mild. In practice, the draft angle of the main sump is typically between 45-90 degrees.

Wherein, the upstream side of each catchment main groove 15 is also connected with a plurality of catchment branch grooves 16 which are arranged at intervals, and the lower ends of the catchment branch grooves are arranged forwards in an inclined way and have smaller inclination than the catchment main grooves.

Like this, catchment branch groove and catchment main tank distribute in the catchment inclined plane, have further improved its catchment diversion effect, have improved filtration's filter effect. In practice, the catchment leg is typically between 0 and 45 degrees.

Wherein each catchment branch groove 16 is in an arc shape or a triangle shape which is symmetrical on two sides. Because the inclination of the catchment branch groove is smaller, the length direction of the catchment branch groove is basically consistent with the resultant force direction of water flow, and the symmetrical arc or triangle is designed to be more beneficial to catchment.

Wherein, the side edge of the downstream side of the filtering sink is also provided with a baffle ridge 17 upwards, and the upper end of the baffle ridge exceeds the upper surface of the gabion by a distance (usually 30-100 cm).

The blocking ridge at the position can block the gabion, so that the stability of the filtering structure is better ensured; meanwhile, the blocking ridge at the position blocks the mud-rock flow to act on the lower part of the mud-rock flow, so that the blocking of water flow is realized, and the filtering effect of the filtering structure is better ensured; in addition, after the debris flow filtered out of most of water hits the blocking ridge, the secondary energy dissipation can be realized, and the stable interception is facilitated to be realized subsequently.

Wherein, the lower end of the baffle ridge 17 and the concrete cushion layer 14 of the catchment inclined plane are poured into a whole.

Therefore, the self weight of the gabion presses the concrete cushion layer to pull the blocking ridge, so that the blocking ridge is prevented from tipping backwards under strong impact, and the stability of the self structure of the gabion is better ensured.

Wherein, the gabions 12 in the filtering sink 11 are arranged in rows along the width direction, and the upper surface of each row of gabions is arranged in a concave arc shape with the downstream side higher than the upstream side.

Therefore, a plurality of arc-shaped surfaces facing water are formed on the upper surface of the gabion, the arc-shaped surfaces can better bear the impact of the debris flow, the contact area of the impact is increased, the water flow can enter the gabion forcibly and permeate downwards, and the water filtering effect is improved; meanwhile, the debris flow can repeatedly jump up and down under the repeated impact and lifting actions of the water-facing arc surface, so that energy dissipation is greatly realized, the flow speed is reduced, the water filtering effect of the gabion on the debris flow is further improved after the flow speed is reduced, and the water content of the follow-up debris flow is reduced.

During implementation, a mud-rock flow interception net device is further arranged in a mud-rock flow channel at the upstream end of the mud-rock flow pre-filtering mud-water separation structure, and the mud-rock flow interception net device is shown in fig. 3-4 and comprises an interception net 1 arranged along the inner cross section direction of the mud-rock flow channel, two sides below the interception net 1 are downwards fixed at the bottom of the mud-rock flow channel, two sides above the interception net 1 are respectively fixed on side slopes at two sides of the mud-rock flow channel in an inclined manner through upper inhaul cables 2, and detachable connecting devices 3 are further arranged on the upper inhaul cables 2.

Thus, when the debris flow arrives, the interception and separation of large-size solid objects which are mixed in the debris flow can be realized through the interception net (the large-size solid objects generally refer to objects with the size larger than a certain requirement in any direction, for example, the range of more than 10 cm to 20 cm); after mud-rock flows, conveniently dismantle upper portion cable through dismantling connecting device, loosen the interception net to the clearance interception material makes it resume the interception function.

Wherein, the outside below of interception net 1 below both sides connect declivity lower part cable 4, lower part cable 4 lower extreme fixed connection is on the lower anchor assembly 5 of mud-rock flow channel bottom both sides.

Therefore, the fixing of the lower part of the interception net is conveniently realized, and when the interception net is detached, only the upper stay rope above the interception net is required to be detached, so that dredging is convenient.

The detachable connecting device 3 comprises a pair of double-lug hanging rings and connecting lugs which are matched with each other, the double-lug hanging rings are fixedly connected to the side edge above the debris flow interception net or are correspondingly arranged on the upper anchoring piece 6 above the debris flow channel side slope in an anchoring mode, the connecting lugs are fixed to the end portions of the upper inhaul cables, and after being matched with the double-lug hanging rings and the connecting lugs, the double-lug hanging rings and the connecting lugs are fixedly connected through detachable pins.

Therefore, the device has the characteristics of simple structure, convenient connection and low cost.

Wherein, both ends of upper portion cable 2 all are provided with detachable connection device 3.

Therefore, the disassembly of the whole upper inhaul cable can be conveniently realized.

Wherein, the upper portion cable 3 position of at least one side still is provided with a set of auxiliary dismounting mechanism side by side, auxiliary dismounting mechanism includes an auxiliary cable 7, and auxiliary cable lower extreme is connected and is being corresponded upper portion cable lower extreme hookup location, and auxiliary cable upper end is connected on corresponding upper portion anchor assembly 6 that upper portion cable upper end was connected, and auxiliary cable middle part position disconnection and respectively be provided with one set of detachable connection device from top to bottom in the disconnected position for two sets of detachable connection device of auxiliary cable middle part disconnected position form a two-way cylinder 8's installation station between.

Therefore, after the debris flow interception is realized, the interception net is blocked by the debris flow material, so that a great pulling force can be formed on the upper inhaul cable, the detachable connecting device at the end part of the upper inhaul cable can not be easily detached in a stressed state, and meanwhile, the inhaul cable can easily fly to cause a safety accident under the action of stress during detachment. Therefore, the auxiliary dismounting mechanism is arranged on the upper inhaul cable on one side in parallel, and when dismounting is needed, one bidirectional oil cylinder is firstly mounted on the bidirectional oil cylinder mounting station on the auxiliary inhaul cable, and the length direction of the bidirectional oil cylinder is adjustable. Therefore, the auxiliary inhaul cable can be tensioned by shortening the length of the bidirectional oil cylinder, so that the corresponding parallel upper inhaul cables are converted from a tightening state to a loosening state, and the upper inhaul cables can be easily and safely disassembled. And then the bidirectional oil cylinder is extended, so that the auxiliary inhaul cable is loosened, and self-disassembly is completed. The detachable connection device on the auxiliary inhaul cable at the disconnection position comprises a double-lug hanging ring fixed at the disconnection position of the auxiliary inhaul cable, a connection supporting lug fixed at one end of the bidirectional oil cylinder and a pin which is detachably connected between the double-lug hanging ring and the connection supporting lug; simple structure, convenient assembly and disassembly and safe and reliable use.

Wherein, auxiliary stay cable 7 lower extreme links to each other with the interception net through a set of detachable connection device, and the upper end links to each other with corresponding upper portion anchor assembly through a set of detachable connection device.

Therefore, the auxiliary stay rope can be detached, and is installed and used when needed.

A plurality of interception nets 1 are arranged at intervals along the front-back direction of the debris flow channel, and meshes of the interception nets 1 gradually decrease from the upstream end to the downstream end.

Therefore, the large-diameter substances can be better intercepted in a grading way, and the interception effect is improved. The mesh diameter of the interception net at the upstream end can be about one meter, and the interception net is mainly used for intercepting trees, and the mesh diameter of the interception net at the downstream end can be about 10-20 cm and is used for intercepting other substances with larger diameters such as falling rocks.

Claims (10)

1. A mud-rock flow blocking and dredging method is characterized in that a lower lying gate which is turned outwards is designed at the lower part of a gate position in the middle of a mud-rock flow blocking dam, and when mud-rock flows through and is dredged, the lower lying gate is turned outwards to open and dredge from the position.

2. The debris flow blocking and dredging method as claimed in claim 1, wherein the debris flow blocking device is implemented, and comprises a blocking dam fixedly arranged in a debris flow channel along the width direction, a gate opening which is downwards opened to the bottom is arranged in the middle of the blocking dam, and a gate is further arranged in the gate.

3. The debris flow blocking and dredging method as claimed in claim 2, wherein the gate lifting control device comprises a support frame which is arranged on a blocking dam above the gate in a portal frame structure, a lifter is arranged on the support frame, the lift further comprises a lifting screw vertically arranged at the upper end of the upper sliding gate, the upper sliding gate is hung at the lower end of the lifting screw and is rotatably arranged between the lower end of the lifting screw, the lifter comprises a lifting motor and a lifting nut which is horizontally arranged, the lifting motor is in transmission connection with the lifting nut, and the lifting nut is limited on the support frame up and down and is in threaded fit with the lifting screw.

4. The debris flow blocking dredging method as claimed in claim 3, wherein the gate turning device comprises a telescopic cylinder device positioned on the downstream side of the lower lying gate, the upper end of the telescopic cylinder device is hinged with the downstream side surface of the lower lying gate, and the lower end of the telescopic cylinder device is hinged on a dam foundation at the downstream end of the gate;

the telescopic cylinder device is a hydraulic cylinder telescopic device.

5. The debris flow blocking dredging method as claimed in claim 3, wherein a gate slot matched with the lower lying gate is further arranged on the dam foundation on the downstream side of the lower lying gate, and the telescopic cylinder device is arranged in the gate slot and enables the lower lying gate to fall into the gate slot after being turned backwards and opened.

6. The debris flow blocking and dredging method as claimed in claim 1, wherein a diversion dike is provided in the upstream debris flow channel opposite to the gate at a distance from the blocking dike.

7. The debris flow blocking and dredging method as claimed in claim 6, wherein the diversion dike is integrally formed in a strip shape along the debris flow channel direction;

the upstream end of the diversion dike is in a forward arc shape;

The bottom of the upstream end of the diversion dike fixedly extends forwards along the bottom of the debris flow channel to form a diversion dike pressing plate.

8. The mud-rock flow blocking and dredging method as claimed in claim 1, wherein the two sides of the blocking dam are connected with the side wall of the mud-rock flow channel to form a waistcoat by protruding upwards, and the outer side of the waistcoat is embedded and fixed on the side wall of the mud-rock flow channel.

9. The debris flow blocking and dredging method as claimed in claim 1, wherein a debris flow blocking front bottom filter system is further arranged on the upstream side of the blocking dam, the debris flow blocking front bottom filter system comprises a filter bottom grid arranged at the bottom of a debris flow channel at the position adjacent to the upstream side of the gate of the blocking dam, the filter bottom grid is communicated with an underdrain below the filter bottom grid, and the underdrain extends to the outside of the downstream end of the blocking dam in the downstream direction.

10. The debris flow blocking and dredging method as claimed in claim 9, wherein the debris flow blocking front bottom filtering system further comprises a debris flow pre-filtering mud-water separation structure arranged in a debris flow channel at the upstream end of the blocking dam, the debris flow pre-filtering mud-water separation structure comprises filtering sedimentation grooves arranged at two sides of the bottom of the debris flow channel, the whole cross section of the bottom of the filtering sedimentation groove is in a V shape matched with the debris flow channel, a gabion is arranged in the filtering sedimentation groove to form a filtering structure, and blind ditches are downwards arranged at the joint between the filtering sedimentation grooves at the two sides and form an underdrain forwards along the debris flow channel.