CN202610762U

CN202610762U - Open-type debris flow blocking dam set

Info

Publication number: CN202610762U
Application number: CN 201220293656
Authority: CN
Inventors: 彭宁波; 张妮; 孙博; 言志信
Original assignee: Lanzhou University
Current assignee: Lanzhou University
Priority date: 2012-06-21
Filing date: 2012-06-21
Publication date: 2012-12-19
Anticipated expiration: 2022-06-21

Abstract

The utility model relates to an open-type debris flow blocking dam set which comprises at least two blocking dams. Each blocking dam comprises a main dam and an auxiliary dam. One end of each main dam is connected with a debris flow channel wall. The other end of each main dam is an open end. Each auxiliary dam is disposed near each main dam. A T-shaped or crisscross structure are formed by each auxiliary dam and each main dam. One end, away from each main dam, of each auxiliary dam faces the flow direction of the debris flow. The blocking dams are staggered with the debris flow channels. A multi-step open design is used, blocking is combined with distribution, speed and impact of the debris flow are lowered gradually after stepwise distribution, and harm of the debris flow is basically eliminated after multi-step blocking. The open-type debris flow blocking dam set is simple in structure, safe, reliable, low in adverse pressure of debris flow accumulation borne by each step of blocking dam, fine in blocking, and convenient to dredge, and dredging vehicles can move back and forth among the blocking dams conveniently for dredging by the aid of the open design.

Description

A kind of open mud-rock flow dam group of blocking

Technical field

The utility model relates to a kind of mud-rock flow dam group of blocking, and is specifically related to a kind of Stability Analysis of Structures, retains and make good use of and the open easily mud-rock flow of the desilting dam group of blocking.

Background technology

At present, mostly the mud-rock flow dam of blocking is enclosed construction, and dam body is provided with the plurality of rows water hole, and the solid matter in the mud-rock flow is blocked in the inventory area of dam dam body and three formations of debris flow gully furrow bank of blocking; On the one hand, under the mud-rock flow percussion, thereby drain hole is easy to stopped up the forfeiture drainage by solid silt or stone; On the other hand; After mud-rock flow repeatedly passes through; The mud-rock flow deposit dam inventory area of will blocking is full of, and this moment, the deposit of accumulation not only formed disadvantageous pressure to the dam of blocking, and the retaining function and also will lose of the dam of blocking; When mud-rock flow took place once more, the effect of blocking that the dam of blocking plays significantly died down.

In case mud-rock flow causes the part on the dam of blocking or when all bursting; Deposit in the storage capacity district is that mud-rock flow provides the more thing source of horn of plenty, and the flow velocity and the flow of mud-rock flow sharply increase, and corrodes carrying capacity and lethality and significantly improves; The dam engineering of blocking of especially building by step; The block chain reaction that produces behind the dam breaking of higher level causes subordinate's dam breaking of blocking, and causes the energy of mud-rock flow to amplify step by step, thereby causes huge harm.

For this reason, be necessary to design a kind of Stability Analysis of Structures, retain and make good use of and the desilting mud-rock flow dam of blocking easily.

The utility model content

The purpose of the utility model is the problem that exists to prior art, a kind of Stability Analysis of Structures is provided, retains and make good use of and the desilting mud-rock flow dam group of blocking easily.

For this reason, the utility model adopts following technical scheme:

A kind of open mud-rock flow dam group of blocking comprises at least two dams of blocking, and the said dam of blocking comprises key dam and auxiliary dam, and said key dam one end and debris flow gully furrow bank join, and the other end is the open end; Said auxiliary dam is provided with near the key dam open end and forms T shape or decussate texture with key dam, and said auxiliary dam points to mud-rock flow away from an end of key dam and comes flow path direction; The said dam of blocking is along the interlaced setting of debris flow gully.

As the last maximum requirement of distance, the distance between the debris flow gully furrow bank of the open end of said key dam and its sensing is less than 1/2nd of debris flow gully furrow width.

As the last minimum requirement of distance, the distance between the debris flow gully furrow bank of the open end of said key dam and its sensing can allow the desilting vehicle to pass through.

Said auxiliary dam and debris flow gully furrow bank parallel; Distance between auxiliary dam and key dam open end is 1/5～1/3 of a key dam length.

Optimally, the said spacing between the dam of blocking is less than the length of key dam.

Further optimally, the said dam equidistance setting of blocking.

The dam group of blocking the open mud-rock flow that the utility model provides adopts multistage open type design, retains with shunting to combine, and the key dam on the dams of blocking at different levels, auxiliary dam and furrow bank form one-level respectively and retain the district; Blocking has an opening between key dam open end, dam and debris flow gully furrow bank, and the interlaced setting of the opening on the dams of blocking at different levels; The every grade of dam of blocking all can play shunting and retain effect when mud-rock flow took place, and especially because being crisscross arranged of the dam outlet of blocking, mud-rock flow is not only reduced step by step and weakens with impact force by shunting and its flow velocity step by step, after multistage the retaining, and the basic elimination of mud-rock flow harm.In addition, auxiliary dam the steadiness that can also strengthen key dam is set, structurally constitute when retaining district's one side and exist as the key dam fixed end, be equivalent to furrow bank on the structure function; Once more, the setting of opening also made things convenient for later stage desilting vehicle block between the dam shuttle back and forth through and dredging operation.

To sum up, the beneficial effect of the utility model is: simple in structure, safe and reliable, the unfavorable pressure of mud-rock flow deposit that the dams of blocking at different levels bear is little; Retain and make good use of, multistage retaining down can be eliminated mud-rock flow harm basically; Desilting is convenient, can be easily in the desilting of shuttling between the dam of respectively blocking through open design desilting vehicle.

Description of drawings

Fig. 1 is the structural representation of the utility model.

The specific embodiment

As shown in Figure 1, a kind of open mud-rock flow dam group of blocking is made up of three dams 1,6,11 of blocking that are located in the debris flow gully 9 and have a same structure, is example with the dam 6 of blocking, and the dam 6 of blocking is made up of key dam 12 and auxiliary dam 7; Place debris flow gully 9 has furrow bank 2,10, and key dam 12 1 ends and furrow bank 10 join, and the other end is open end 5, forms an opening 4 between the furrow bank 2 of this open end 5 and its sensing; Key dam 12 forms a decussate texture with auxiliary dam 7, auxiliary dam 7 and furrow bank 2,10 parallel and auxiliary dam 7 and key dam 12 open ends 5 between distance be 1/3rd of key dam 12 dam lengths; Auxiliary dam 7 relative key dams 12 have a far-end 8 and a near-end 3, and wherein the far-end 8 sensing mud-rock flows of auxiliary dam 7 come flow path direction; Dam 1,6, the 11 interlaced and equidistance settings of blocking along debris flow gully, and then form interlaced opening, and the spacing on the dam 1,6,11 of blocking is less than the length of key dam 12.

Distance between the open end 5 of key dam 12 and the furrow bank 2 of its sensing is that the width of opening 4 can allow a desilting vehicle to pass through less than two/in the lump of debris flow gully 9 furrow widths.

Debris flow gully with furrow width 25m is an example, and the length of key dam 12 is 21m, and key dam 12 open ends 5 are 3.5m apart from the distance of the furrow bank 2 of its sensing, and auxiliary dam 7 is 7m apart from the distance of key dam open end 5, and the dam 1,6 of blocking, the spacing between 11 are 20m.

When mud-rock flow took place, key dam 12 and auxiliary dam 7 and furrow bank 2,10 formed the one-levels zone of blocking, thereby the part mud-rock flow gets into the subordinates zone of blocking through opening 4 mud-rock flow were played shunting action; And

dam

1,6,10 is crisscross arranged owing to block; The zone is blocked always over against the block opening on dam of higher level by subordinate, and after shunting step by step and retaining, the flow velocity of mud-rock flow, flow and impact force obviously reduce; Through after multistage the retaining, destructive power is retained or lost to mud-rock flow fully.

After mud-rock flow finished, the desilting vehicle got into debris flow gully 9 and carries out desilting, because the width setting of opening 4 is satisfied the requirement that vehicle passes through, so desilting vehicle the shuttling back and forth of 1,6,10 on dam of can realizing easily blocking, thorough desilting is carried out in the zones of blocking at different levels.

For the open mud-rock flow of the utility model dam group of blocking, the number on the dam of blocking can be according to the occurrence frequency and the setting of flow size reasonable of this area's mud-rock flow, and satisfies to be crisscross arranged and get final product.

Claims

1. open mud-rock flow dam group of blocking is characterized in that, comprises at least two dams of blocking; The said dam of blocking comprises key dam and auxiliary dam, and said key dam one end and debris flow gully furrow bank join, and the other end is the open end; Said auxiliary dam is provided with near the key dam open end and forms T shape or decussate texture with key dam, and said auxiliary dam points to mud-rock flow away from an end of key dam and comes flow path direction; The said dam of blocking is along the interlaced setting of debris flow gully.

2. a kind of open mud-rock flow according to claim 1 dam group of blocking is characterized in that the distance between the debris flow gully furrow bank of the open end of said key dam and its sensing is less than 1/2nd of debris flow gully furrow width.

3. a kind of open mud-rock flow according to claim 2 dam group of blocking is characterized in that the distance between the debris flow gully furrow bank of the open end of said key dam and its sensing can allow the desilting vehicle to pass through.

4. a kind of open mud-rock flow according to claim 3 dam group of blocking is characterized in that, the said spacing between the dam of blocking is less than the length of key dam.

5. a kind of open mud-rock flow according to claim 4 dam group of blocking is characterized in that the said dam equidistance setting of blocking.

6. according to described any one the open mud-rock flow of claim 1～5 dam group of blocking, it is characterized in that said auxiliary dam and debris flow gully furrow bank parallel.

7. a kind of open mud-rock flow according to claim 6 dam group of blocking is characterized in that the distance between said auxiliary dam and key dam open end is 1/5～1/3 of a key dam length.