CN210946717U - Water-stone flow-dividing type debris flow decelerating dam - Google Patents
Water-stone flow-dividing type debris flow decelerating dam Download PDFInfo
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- CN210946717U CN210946717U CN201921900588.0U CN201921900588U CN210946717U CN 210946717 U CN210946717 U CN 210946717U CN 201921900588 U CN201921900588 U CN 201921900588U CN 210946717 U CN210946717 U CN 210946717U
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Abstract
The utility model discloses a water-stone shunting type debris flow deceleration dam, which comprises a flood discharge channel, wherein two sides of the flood discharge channel are built with a ditch protection wall, and the dam comprises a gap following dam fixed on the ditch protection wall, wherein the gap following dam extends towards the inner direction of the flood discharge channel, and the gap following dam inclines towards the downstream direction; gaps on the walls of the protection ditches built at the two sides are alternately distributed along the dam; still including burying the drainage tunnel in flood discharge ditch bottom surface underground, the drainage tunnel extends along the central line of flood discharge ditch, and the top of drainage tunnel sets up hydrophobic grid. An object of the utility model is to provide a water stone reposition of redundant personnel type mud-rock flow speed reduction dam to the water stone isolating construction who solves among the prior art mud-rock flow is mostly the disposable interception structure of fixed point, and the problem that its water stone reposition of redundant personnel ability will weaken greatly after the siltation is enough high behind the dam realizes becoming the single-point reposition of redundant personnel for the multiple spot reposition of redundant personnel, uses water stone reposition of redundant personnel and slows down for giving first place to, intercepts the purpose of the mud-rock flow treatment mode for assisting.
Description
Technical Field
The utility model relates to a civil engineering field, concretely relates to water stone reposition of redundant personnel type mud-rock flow speed reduction dam.
Background
The debris flow is a complex multiphase fluid, contains, wraps and supplies a large amount of silt, broken stones and even boulders in the movement process, has huge impact force, is irreparable in the place where the debris flow arrives, is seriously damaged, and causes unpredictable and serious erosion to the side wall and the bottom of the trench in the circulation area. If the method can separate the water stone of the debris flow, apply the water stone division treatment and only treat the flood at the downstream, the situation is simpler and clearer, and the treatment engineering is more economic and reliable.
The existing debris flow water-stone separation structure mostly adopts fixed-point disposable water-stone diversion, and mainly adopts the idea of blocking, most problems are intended to be solved at the dam position, but the direct problem of the idea is that the water-stone diversion capability of the dam is greatly weakened after the dam is deposited high enough.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a water stone reposition of redundant personnel type mud-rock flow speed reduction dam to the water stone isolating construction who solves among the prior art mud-rock flow is mostly the disposable interception structure of fixed point, and the siltation is enough after the dam problem that its water stone reposition of redundant personnel ability will weaken greatly, realizes becoming the single-point reposition of redundant personnel for the multiple spot reposition of redundant personnel, uses water stone reposition of redundant personnel and slows down to be main, intercepts the purpose of administering the mode for the mud-rock flow of assisting.
The utility model discloses a following technical scheme realizes:
the water-stone shunting type debris flow decelerating dam comprises a flood discharge channel, wherein two sides of the flood discharge channel are provided with built ditch protecting walls, and the water-stone shunting type debris flow decelerating dam also comprises a downstream dam with holes, which is fixed on the built ditch protecting walls, the downstream dam with the holes extends towards the inner direction of the flood discharge channel, and the downstream dam with the holes inclines towards the downstream direction; gaps on the walls of the protection ditches built at the two sides are alternately distributed along the dam; still including burying the drainage tunnel in flood discharge ditch bottom surface underground, the drainage tunnel extends along the central line of flood discharge ditch, and the top of drainage tunnel sets up hydrophobic grid.
Among the prior art debris flow water stone isolating construction adopts the disposable water stone reposition of redundant personnel of fixed point more to block the thinking of giving first place to, the intention is just solving most problems in establishing dam department, but the direct problem that this kind of thinking faced is exactly that its water stone reposition of redundant personnel ability will weaken greatly after the sufficient height of siltation behind the dam, for this reason, the utility model provides a debris flow type debris flow speed reduction dam sets up the flood discharge canal in the relatively gentle circulation section of debris flow, and both sides set up the step and protect the ditch wall, provide the protection to the slot lateral wall, prevent that the debris flow from scouring away bed and ditch wall, for providing the condition with the drainage tunnel performance along the dam. All set up foraminiferous following dam on the step of both sides protects the ditch wall, and the step of both sides protects and in proper order distributes in turn on the ditch wall, and foraminiferous following dam extends towards the inside direction of flood discharge canal, and foraminiferous following dam downstream direction slope, consequently take the hole to lead the debris flow along the dam, change debris flow direction, increase the flow path of debris flow in the flood discharge canal in other words, extension transit time. Under the action of the dam with each hole, the debris flow flows in an approximately S shape in the flood discharge channel. Meanwhile, as the name suggests, the gaps are inevitably provided with holes along the dam, and after part of debris flow passes through the holes, the debris flow can form turbulent flow with the flow along the dam, so that mutual disturbance is beneficial to the deceleration of the debris flow. The sinking type drainage tunnel in the middle of the flood discharge channel is responsible for drainage, when debris flow flows around each band of holes in the flood discharge channel along a dam, the debris flow can pass through the upper part of the drainage tunnel for many times, water or slurry can seep into the drainage tunnel through the drainage grids, the water-stone separation process is completed, and water flows seep and then are drained through the tunnel drop. The slurry flow loses water or becomes more dense, and gradually slows down to stay in the spillway above the hydrophobic grid. In this application, the main effect of foraminiferous following the dam is speed reduction mud-rock fluid rather than the interception, works as in theory the utility model discloses the flood discharge canal of structure arranges enough long-term along mud-rock flow ditch, and mud-rock flow will progressively accomplish the water-rock reposition of redundant personnel and stop completely in the ditch. Even if the structure is difficult to arrange in a long section due to limited field construction conditions, the flow velocity of the debris flow can be remarkably reduced through the structure, and multiple times of sufficient water-stone separation can be performed. The mud-rock flow of having deviate from a large amount of moisture, its mobility can show and reduce, again through this application to flow path's extension, whole velocity of flow can show and reduce, then can obtain the weakening that is showing to downstream erosion hazard. In conclusion, the river-rock diversion and debris flow deceleration are taken as main targets, the traditional single-point interception diversion idea is changed into a segmental and reciprocating diversion deceleration, the problem that single-point interception is easy to silt and lose efficacy is solved, and the method is applicable to treatment of large and medium debris flow ditches. And, the utility model discloses it is big to stop behind the structure section formula is arranged silt space, has reduced structure maintenance frequency, and then has reduced the maintenance cost.
Further, each perforated paradam spans the drainage tunnel. The drainage tunnels are distributed along the center line of the flood discharge channel, so that each perforated downstream dam crosses the center line of the flood discharge channel, and projections of the perforated downstream dams on the two sides on the cross section have overlapping parts, so that debris flow can pass through the drainage tunnels once when bypassing one perforated downstream dam, and the debris can be separated once during each round of flow.
Furthermore, the hydrophobic grating is a transverse steel bar grating. Wherein lateral refers to the span of the spillway.
Furthermore, the bottom surface both sides height of spillway, the centre is low, drainage tunnel is located the below of the lowest position in the middle of the spillway. During rivers assembled the entering drainage tunnel towards the centre, the inclined plane setting of flood discharge canal bottom surface both sides simultaneously further increases flow path more, and the friction of increase mud-rock flow and flood discharge canal bottom surface is favorable to further slowing down the velocity of flow.
Furthermore, one end of the downstream dam with the hole, which is adjacent to the built ditch wall, is higher than one end of the downstream dam with the hole, which is positioned in the flood discharge ditch. When the upstream debris flows, the upstream debris firstly impacts one end of the open face dam close to the wall of the built protection ditch and easily passes the end. Consequently it is higher to set up the one end that takes the hole to protect the dam and build the ditch wall adjacent, avoids the mud-rock flow to cross easily, ensures the abundant speed reduction and the dehydration of this application of process of mud-rock flow.
Further, the gradient of one side of the gap-containing downstream dam facing the upstream direction is smaller than that of one side facing the downstream direction. The slope of the upstream surface of the downstream dam with the hole is slower, the slope of the downstream surface of the downstream dam with the hole is steeper, the arrangement can utilize the slower slope of the upstream surface to provide more buffer distance for debris flow, and therefore the debris flow is favorably decelerated, and conditions are provided for debris flow diversion.
Further, the bottom surface of the drainage tunnel is stepped and gradually decreases towards the downstream direction.
Furthermore, the drainage tunnel is square, and two adjacent sections of drainage tunnels are in lap joint.
Furthermore, the engineering vehicle for clearing in the ditch can continuously detour around each belt hole along the dam in the flood discharge ditch. In this application, the main effect of foraminiferous following the dam is speed reduction mud-rock fluid rather than the interception, works as in theory the utility model discloses the flood discharge canal of structure arranges enough long-term along mud-rock flow ditch, and the mud-rock flow will progressively be accomplished the water-rock reposition of redundant personnel and stop completely in the ditch, consequently must consider the interior clearing problem of ditch. Consequently, the angle, length, vertical interval isoparametric that take the hole to follow the dam in this application all need carry out rational design according to actual engineering condition to satisfy the engineering vehicle that is used for in the ditch clear side and can follow the dam around each taking the hole in succession in the flood discharge canal and detour as the prerequisite, avoid the vehicle to be difficult to turn to in the flood discharge canal, the problem of turning round, ensure that the clear side operation of post-disaster mud-rock flow can go on smoothly.
A clearing method based on a water-stone diversion type debris flow decelerating dam is used for enabling engineering vehicles for clearing in a ditch to continuously detour around each band of holes in a flood discharge ditch along the dam, and continuously stride over a drainage tunnel in the detouring process; when the top surface of the drainage tunnel is covered and loses the water combing capacity, the vehicle is stopped to clean the top surface of the drainage tunnel. Of course, work vehicles for clearing the trench may enter the spillway from either the upstream or downstream end.
Specifically, because the speed reduction dam structure of this application is arranged the back, it is big to stop the silt space, need not the clearing side under the general condition, only when most drainage tunnel top surface all be covered and just consider the clearing side operation after losing the combing water ability, has alleviateed the work load of management part greatly.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the utility model discloses water-stone flow distribution type mud-rock flow speed reduction dam can show the velocity of flow that reduces the mud-rock flow to a lot of, abundant water-stone separation. The mud-rock flow of having deviate from a large amount of moisture, its mobility can show and reduce, again through this application to flow path's extension, whole velocity of flow can show and reduce, then can obtain the weakening that is showing to downstream erosion hazard.
2. The utility model discloses water stone reposition of redundant personnel type mud-rock flow speed reduction dam, this application use water stone reposition of redundant personnel and mud-rock flow speed reduction as the main part target, become traditional single-point interception reposition of redundant personnel thinking and for the segmentation formula, reciprocal a lot of reposition of redundant personnel speed reduction, avoided the easy siltation of single-point interception problem that became invalid, applicable in the treatment of big-and-middle-sized mud-rock flow ditch. And, the utility model discloses it is big to stop behind the structure section formula is arranged silt space, has reduced structure maintenance frequency, and then has reduced the maintenance cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a top view of an embodiment of the present invention;
FIG. 2 is an elevation view of an embodiment of the present invention;
FIG. 3 is an isometric view of a drainage tunnel according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a drainage tunnel in an upstream direction and a downstream direction in an embodiment of the present invention;
FIG. 5 is a side view of a downstream dam with a gap in a spillway according to an embodiment of the present invention;
fig. 6 is a schematic view of a traveling route of a square-cleaning work vehicle according to an embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
1-building a ditch protection wall, 2-a following dam with holes, 3-a drainage tunnel, 4-a hydrophobic grid and 5-designing the maximum debris flow overflowing height.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1:
the water-stone diversion type debris flow decelerating dam shown in fig. 1 and fig. 2 comprises a flood discharge channel, wherein two sides of the flood discharge channel are provided with built ditch protecting walls 1, and the dam 2 with holes is fixed on the built ditch protecting walls 1, the dam 2 with the holes extends towards the inner direction of the flood discharge channel, and the dam 2 with the holes inclines towards the downstream direction; gaps on the two side built trench protection walls 1 are alternately distributed along the dam 2; still including burying underground the drainage tunnel 3 in the flood discharge ditch bottom surface, drainage tunnel 3 extends along the central line of flood discharge ditch, and drainage tunnel 3's top sets up hydrophobic grid 4.
Wherein the protective ditch wall is built to prevent debris flow from scouring the ditch bed and the ditch wall, and provides conditions for the function of the following dam with holes and the drainage tunnel; the flowing direction of the debris flow is changed along the dam with the hole, which is equivalent to the increase of the flowing path, and meanwhile, after part of the debris flow passes through the hole, the debris flow and the downstream flow form turbulent flow, thereby being beneficial to the deceleration of the debris flow; the sinking type drainage tunnel with the opening at the top part in the middle of the ditch is responsible for water combing, when debris flow flows around a dam, the debris flow can pass through the tunnel for many times, and water flow is drained away after seeping downwards through the tunnel.
Example 2:
as shown in fig. 1 to 5, the water-stone diversion type debris flow decelerating dam has a trapezoidal structure with a gap, a high end along the edge of the dam is low, and the cross section is steep at the back and the gentle surface. The main function of the dam is to guide the mud-rock flow to flow, and the special section structure of the dam is also helpful to slow down the mud-rock flow and provides conditions for diversion of water and rock. The drainage tunnel adopts a rectangular structure and a step foundation, and the section size of the drainage tunnel is determined by calculation according to the drainage. The top is provided with a transverse steel bar grating which can adopt
And (5) reinforcing steel bars. The arrangement parameters of the dam with the holes comprise angles, lap joint lengths and vertical intervals, main design parameters comprise section sizes and hole sizes, specific sizes are flexibly designed according to field conditions, and the requirement that engineering vehicles used for clearing in the ditch can continuously detour around the dam 2 with the holes in the flood discharge channel is met. In particular to the present implementationIn the example, the conditions of D > 0, l ≧ 2R, R-D > 5.5m, and R > 12m in FIG. 6 are satisfied at the same time.
Preferably, each apertured dam 2 spans the drainage tunnel 3. The hydrophobic grille 4 is a transverse steel bar grille.
The bottom surface both sides of flood discharge channel are high, the centre is low, drainage tunnel 3 is located the below of the lowest position in the middle of the flood discharge channel.
The end of the downstream dam 2 with the hole adjacent to the building protection ditch wall 1 is higher than the end positioned in the flood discharge ditch. The gradient of one side of the downstream dam 2 facing the upstream direction is smaller than that of one side facing the downstream direction. The bottom surface of the drainage tunnel 3 is stepped and gradually decreases towards the downstream direction. The drainage tunnel 3 is square, and two adjacent sections of the drainage tunnels 3 are in lap joint. The engineering vehicle for clearing in the ditch can continuously detour around each hole along the dam 2 in the flood discharge ditch.
The clearing method of the embodiment is that the engineering vehicle used for clearing in the ditch, generally a medium-sized truck, is matched with an excavator, continuously bypasses the dam 2 around each hole in the flood discharge ditch to complete the clearing operation of debris flow in the ditch, focuses on clearing the drainage grating on the top surface of the drainage tunnel to ensure the drainage capability of the drainage grating to be recovered, and prepares for meeting the next debris flow outbreak.
The embodiment uses the water-stone flow diversion and the debris flow deceleration as main targets, changes the single-point interception flow diversion into the segment-falling type flow diversion deceleration, avoids the problem that the single-point interception is easy to silt and lose efficacy, and can be suitable for the treatment of medium and large debris flow ditches. The silt stopping space is large after the sectional type arrangement of the embodiment, the clearing is not needed generally, and the clearing operation is considered only when the top surfaces of most of the drainage tunnels are covered and lose the water combing capacity. The workload of the management part is greatly reduced.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The water-stone shunting type debris flow decelerating dam comprises a flood discharge channel, wherein two sides of the flood discharge channel are provided with built ditch protecting walls (1), and the water-stone shunting type debris flow decelerating dam is characterized by further comprising a downstream dam (2) with holes, wherein the downstream dam (2) with the holes extends towards the inner direction of the flood discharge channel, and the downstream dam (2) with the holes inclines towards the downstream direction; gaps on the two side-built trench protection walls (1) are alternately distributed along the dam (2); still including burying underground drainage tunnel (3) in the flood discharge canal bottom surface, drainage tunnel (3) extend along the central line of flood discharge canal, and the top of drainage tunnel (3) sets up hydrophobic grid (4).
2. The dam of claim 1, wherein each said perforated paradam (2) spans said drainage tunnel (3).
3. The aqualith flow type debris flow decelerating dam according to claim 1, wherein said hydrophobic grid (4) is a transverse steel bar grid.
4. The dam of claim 1, wherein the bottom surface of the spillway is high at both sides and low at the middle, and the drainage tunnel (3) is located below the lowest position in the middle of the spillway.
5. The dam of claim 1, wherein the end of the pored dam (2) adjacent to the trench wall (1) is higher than the end located inside the spillway.
6. An aqualite flow decelerating dam according to claim 1, characterised in that the gradient of the side of said apertured follow dam (2) facing in the upstream direction is smaller than the gradient of the side facing in the downstream direction.
7. The aqualith flow decelerating dam according to claim 1, characterised in that the bottom surface of the drainage tunnel (3) is stepped decreasing towards the downstream direction.
8. The dam of claim 1, wherein the drainage tunnels (3) are square, and two adjacent sections of the drainage tunnels (3) are overlapped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921900588.0U CN210946717U (en) | 2019-11-06 | 2019-11-06 | Water-stone flow-dividing type debris flow decelerating dam |
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| CN201921900588.0U CN210946717U (en) | 2019-11-06 | 2019-11-06 | Water-stone flow-dividing type debris flow decelerating dam |
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| CN210946717U true CN210946717U (en) | 2020-07-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110656628A (en) * | 2019-11-06 | 2020-01-07 | 四川省交通勘察设计研究院有限公司 | Water-stone flow diversion type debris flow decelerating dam and clearing method thereof |
| CN112813921A (en) * | 2021-01-06 | 2021-05-18 | 西南科技大学 | Mud-rock flow water-stone separation and storage system |
-
2019
- 2019-11-06 CN CN201921900588.0U patent/CN210946717U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110656628A (en) * | 2019-11-06 | 2020-01-07 | 四川省交通勘察设计研究院有限公司 | Water-stone flow diversion type debris flow decelerating dam and clearing method thereof |
| CN112813921A (en) * | 2021-01-06 | 2021-05-18 | 西南科技大学 | Mud-rock flow water-stone separation and storage system |
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