CN103806410A - Mountain torrent debris flow drainage trough of stair-double pond structure and application thereof - Google Patents
Mountain torrent debris flow drainage trough of stair-double pond structure and application thereof Download PDFInfo
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- CN103806410A CN103806410A CN201410039833.9A CN201410039833A CN103806410A CN 103806410 A CN103806410 A CN 103806410A CN 201410039833 A CN201410039833 A CN 201410039833A CN 103806410 A CN103806410 A CN 103806410A
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Abstract
The invention discloses a mountain torrent debris flow drainage trough of a stair-double pond structure. The mountain torrent debris flow drainage trough of the stair-double pond structure is suitable for mountain torrent debris flow gullies with an especially large gully bed longitudinal slope. The trough bottom of the drainage trough comprises a plurality of full-lining stair segments and a double-pond segment filling the space between an upstream stair segment and a downstream stair segment. The stair segments comprise upper end notched sills on the upstream, lower end notched sills on the downstream and full-lining base plates connected with the upper end notched sills and the lower end notched sills. The double-pond segment comprises an upper pond on the upstream, a lower pond on the downstream and inter-pond notched sills between the upper pond and the lower pond, the top face of the upper pond is flush with the top faces of the inter-pond notched sills, and the top face of the lower pond is flush with the highest position of the downstream stair segment. A rigid protection bottom is adopted by the upper pond, and steel cable net box bodies and energy consumption stone are laid at the protection bottom in sequence. A rigid protection bottom is adopted by the lower pond, and energy consumption stone is laid at the protection bottom. Compared with the prior art, the stair-double pond structure is fully utilized for adjusting the flowing speed of mountain torrent debris flow and controlling washout of a mountain torrent debris flow body on the trough bottom, the normal drainage function can be achieved, and later maintenance cost is lowered.
Description
Technical field
The present invention relates to a kind of mountain torrents debris flow technology, particularly relate to a kind of ladder-Shuangtan structural type mountain torrents debris flow drainage groove that is applicable to special major groove bed longitudinal river slope mountain torrents debris flow gully.
Background technology
Flush flood and debris flow disaster is one of main Types of China's geological disaster.Along with the development of mountain area economy, the in-depth of development of the West Regions, mountain torrents mud-rock flow Control Engineering demand is more and more vigorous.Drainage groove, as one of main Types of mountain torrents debris flow control works, uses in a large number in mountain torrents Controlling Debris Flow.
After Wenchuan earthquake, there is a large amount of king-sized mountain torrents debris flow gullies of ditch bed longitudinal river slope, its ditch bed longitudinal river slope even reaches 0.50-0.60.For the king-sized mountain torrents mud-rock flow of groove gradient, conventional full lining cutting type debris flow drainage groove (being commonly called as V-type groove) can be arranged safely and lead mountain torrents at present, if but arrange and lead mud-rock flow with V-type groove, there will be because of mud-rock flow movement velocity in groove and too greatly strongly denude bottom land, cause greatly reducing the application life of drainage groove, the maintenance cost of increase runtime.For the king-sized mountain torrents mud-rock flow of groove gradient, casing lining cutting formula debris flow drainage groove (ZL201110380681.5) can be arranged safely and lead mountain torrents, if but arrange and lead mud-rock flow with casing lining cutting formula debris flow drainage groove, prevention effect for low frequency debris flow is better, but for high frequency mud-rock flow, because abrasion resistance and the impact resistance of box body wall are limited, easily occur that box body wall is destroyed and greatly reduce the regulating effect to mud-rock flow.For the king-sized mountain torrents mud-rock flow of groove gradient, lead mountain torrents if use the current conventional soft base energy dissipation type of rib sill debris flow drainage groove (being commonly called as Dongchuan groove) to arrange, mountain torrents, by kinetic energy meeting scour trough subsoil body powerful after rib sill, threaten rib sill safety, cause drainage groove entirety to be destroyed; If arrange and lead mud-rock flow with Dongchuan groove, in the time that rib sill spacing is larger, there will be mud-rock flow to fall the discrepancy in elevation excessive, with bottom land soil body strong effect at the bottom of scour trough, threaten rib sill safety, cause drainage groove entirety to be destroyed, when rib sill spacing hour, not only can greatly increase construction investment, safety that can not fine guarantee rib sill.
Summary of the invention
Object of the present invention is exactly for the deficiencies in the prior art,, mountain torrents mud-rock flow large especially for the ditch bed longitudinal river slope situation that strong abrasion and the souring of mountain torrents debris flow body in situation often causes the heavy damage of drainage groove bottom land, cannot normally use, later maintenance is costly that takes place frequently, provide a kind of safe, later maintenance expense is few, meet excretion mountain torrents and mud-rock flow, be applicable to ladder-Shuangtan structural type mountain torrents debris flow drainage groove of special major groove bed longitudinal river slope mountain torrents debris flow gully simultaneously.
For achieving the above object, technical scheme of the present invention is:
One species stage-Shuangtan structural type mountain torrents debris flow drainage groove that the present invention proposes, comprises the drainage groove side wall of drainage groove bottom land and both sides thereof; Described drainage groove bottom land comprises ladder section and the Shuangtan section of filling between upstream and downstream ladder section of some full lining cutting that arrange at a certain distance; Ladder section comprise be positioned at upstream upper end notched sill, be positioned at the lower end notched sill in downstream and connect the full lining cutting base plate of upper end notched sill and lower end notched sill; Described Shuangtan section comprise in the upper pool of upstream, in the lower pool in downstream and between the pool between Shang Tan and lower pool notched sill, between upper pool end face and pool, notched sill end face is concordant, lower pool end face is concordant with the highest point of downstream ladder section; Described upper pool comprises pool rigidity river bottom protection, the cable wire net cage body power consumption layer that the cable wire net cage body of being located at rigidity river bottom protection top, pool, be cable wire net parcel piece stone by some structures forms (is that cable wire net cage body power consumption layer is made up of several cable wire net cage bodies, the structure of cable wire net cage body is cable wire net parcel piece stone), and be located at notched sill between side wall, cable wire net cage body power consumption layer, upstream step section lower end notched sill and pool and surround the upper pool piece stone in space; Described lower pool comprises lower pool rigidity river bottom protection, and is located at notched sill between side wall, lower pool rigidity river bottom protection, downstream ladder section upper end notched sill and pool and surrounds the lower pool piece stone in space; Between upstream step section lower end notched sill end face and upper pool end face, be provided with lower end notched sill flying height h
11, between pool, between notched sill end face and lower pool end face, be provided with notched sill flying height h between pool
21.
The main function of described Shuangtan section performance is to consume part mountain torrents mud-rock flow movement kinetic energy, regulation and control mountain torrents debris flow velocity, control mountain torrents debris flow body washing away drainage groove bottom land.Described Shuangtan comprises Shang Tan and Xia Tan, and the piece stone of filling in two pools and mountain torrents debris flow body interact to consume mountain torrents mud-rock flow movement kinetic energy, realizes regulation and control mountain torrents debris flow velocity, controls the object that mountain torrents mud-rock flow washes away bottom land and ladder section is denuded.Described cable wire net cage body power consumption layer can absorb the impact energy of mountain torrents mud-rock flow, the energy-absorbing in pool, buffering in process, and mountain torrents mud-rock flow weakens greatly to the impact in lower pool, therefore descends pool not establish cable wire net cage body power consumption layer.Rigidity river bottom protection in described two pools can stop the exchange of mountain torrents debris flow body and bottom land foundation soil body, thereby controls mountain torrents debris flow body to the washing away of drainage groove bottom land, and ensures that normal row leads Function, reduces later maintenance expense; For excretion mountain torrents, rigidity river bottom protection contributes to form sealing puddle and further mountain torrents is carried out to energy dissipating.
Described Shuangtan segment length L
5equal pool length L
2, lower pool length L
4and notched sill width L between pool
3sum.Lower end notched sill height h
1equal lower end notched sill flying height h
11, upper pool piece stone laying depth h
12, cable wire net cage body power consumption layer thickness h
13and upper pool rigidity river bottom protection thickness h
14sum; Notched sill height h between pool
2equal notched sill flying height h between pool
21, lower pool piece stone laying depth h
22and lower pool rigidity river bottom protection thickness h
23sum; Upper end notched sill height h
3equal lower pool piece stone laying depth h
22with lower pool rigidity river bottom protection thickness h
23sum.
Lower end notched sill flying height h
11and notched sill flying height h between pool
21sum h
11+ h
21=(L
1+ L
5) × i
0-L
1× i
1; L in formula
1for ladder segment length, the m of unit, L
5for Shuangtan segment length, the m of unit, i
0for the average longitudinal river slope of ditch bed, general value is 0.3-0.5, i
1for ladder section ratio falls, general value is 0.08-0.15.In order to give full play to energy-absorbing effect of cable wire net cage body power consumption layer, and reduce the probability of failure of notched sill between pool, lower end notched sill flying height h
11be more than or equal to notched sill flying height h between pool
21.For balance controlled investment and construction speed, lower end notched sill flying height h
11should control and be less than or equal to 2.8m, notched sill flying height h between pool
21should control and be less than or equal to 2.3m, for this reason, Shuangtan segment length L
5be more than or equal to ladder segment length L
11/3rd, be less than or equal to ladder segment length L simultaneously
1.
Upper pool piece stone laying depth h
12, cable wire net cage body power consumption layer thickness h
13, upper pool rigidity river bottom protection thickness h
14mainly according to the maximum unit weight of design flash flood debris flow body and lower end notched sill flying height h
11plan general h
12get 0.5-1.0m, h
13get 0.5-1.0m, h
14get 0.4-1.0m; When the maximum unit weight of design flash flood debris flow body is large, lower end notched sill flying height h
11when larger, h
12, h
13, h
14get large value, when the maximum unit weight of design flash flood debris flow body is less, lower end notched sill flying height h
11hour, h
12, h
13, h
14get the small value.
Lower pool piece stone laying depth h
22, lower pool rigidity river bottom protection thickness h
23mainly according to notched sill flying height h between the maximum unit weight of design flash flood debris flow body and pool
21plan general h
22get 0.5-1.0m, h
23get 0.4-1.0m; The notched sill flying height h when the maximum unit weight of design flash flood debris flow body is large, between pool
21when larger, h
22, h
23get large value, the notched sill flying height h when the maximum unit weight of design flash flood debris flow body is less, between pool
21hour, h
22, h
23get the small value.
Notched sill width L between pool
3mainly according to the average longitudinal river slope i of ditch bed
0plan general L
3get 1.0-1.5m; As the average longitudinal river slope i of ditch bed
0when larger, L
3get large value, as the average longitudinal river slope i of ditch bed
0hour, L
3get the small value.Upper pool length L
2, lower pool length L
4mainly plan general L according to the maximum unit weight of design flash flood debris flow body
2get 1.5-3.0m, L
4get 1.0-1.5m; In the time that the maximum unit weight of design flash flood debris flow body is larger, L
2and L
4get large value, when the maximum unit weight of design flash flood debris flow body hour, L
2and L
4get the small value.
Length and the wide 1.5-3.0m that is generally of the described cable wire net cage body of composition cable wire net cage body power consumption layer, height is generally 0.5-1.0m.The cable wire net mesh size of described cable wire net cage body is generally 0.1m × 0.1m-0.2m × 0.2m, and rope diameter is generally 0.005-0.01m, mainly according to the maximum unit weight of design flash flood debris flow body and lower end notched sill flying height h
11plan; When the maximum unit weight of design flash flood debris flow body is large, lower end notched sill flying height h
11when larger, mesh size, rope diameter are got large value, when the maximum unit weight of design flash flood debris flow body is less, lower end notched sill flying height h
11hour, mesh size, rope diameter get the small value.The minimum grain size that wraps up piece stone in the cable wire net of described cable wire net cage body is preferably 1.2-2.0 times of cable wire net mesh diameter.
The upper pool piece stone particle diameter of Shuangtan section and lower pool piece stone particle diameter are planned according to the maximum unit weight of design flash flood debris flow body, generally get 0.2-0.5m, in the time that the maximum unit weight of design flash flood debris flow body is larger, piece stone particle diameter is got large value, when the maximum unit weight of design flash flood debris flow body hour, piece stone particle diameter gets the small value.
Full lining cutting base plate is generally stone masonry structure or concrete structure or reinforced concrete structure, and thickness is generally 0.5-1.0m.I falls in ladder section ratio
1determine according to the abrasion resistance of full lining cutting baseboard material, generally get 0.08-0.15.Ladder segment length L
1mainly according to the average longitudinal river slope i of ditch bed
0plan with full lining cutting baseboard material, generally get 6.0-10.5m; As the average longitudinal river slope i of ditch bed
0large, full lining cutting baseboard material abrasion resistance hour, ladder segment length L
1get the small value; As the average longitudinal river slope i of ditch bed
0when less, full lining cutting baseboard material abrasion resistance is larger, ladder segment length L
1get large value.
In order to be more suitable for equilibrium drainage mountain torrents mud-rock flow in the large especially situation of ditch bed longitudinal river slope, the situation of avoiding appearance strongly to wash away and deposit, the ratio of drainage groove bottom land width B and drainage groove depth H (being side wall effective height) is more than or equal to 2.0, i.e. B/H >=2.0.The large especially general average longitudinal river slope i of dactylotome bed of described ditch bed longitudinal river slope
0be more than or equal to 0.30, i.e. i
0>=0.30.Ladder-Shuangtan structural type mountain torrents debris flow drainage groove that the present invention proposes is specially adapted to the average longitudinal river slope i of ditch bed
0for mountain torrents and the debris flow drainage of 0.3-0.5 are led.
Compared with prior art, the invention has the beneficial effects as follows: make full use of ladder-Shuangtan structure and make mountain torrents debris flow body and piece stone interact to consume componental movement kinetic energy, regulation and control mountain torrents debris flow velocity, and utilize cable wire net cage body to absorb the part impact energy of mountain torrents mud-rock flow, utilize rigidity river bottom protection to prevent mountain torrents mud-rock flow washing away bottom land, thereby ensure that normal row leads Function, reduces later maintenance expense, compared with full lining cutting type drainage groove, it is safer that under the condition of abrupt slope, row leads mountain torrents mud-rock flow, Effective Regulation mountain torrents debris flow velocity, reduce the abrasion of mountain torrents mud-rock flow to bottom land, Engineering Reliability increases substantially, later maintenance expense reduces by 60～80%, compared with the soft base energy dissipation type of rib sill drainage groove, more effectively control the wash away erosion of mountain torrents mud-rock flow to bottom land, guarantee cell body safety, Engineering Reliability increases substantially, later maintenance expense reduces by 20～40%, compared with casing lining cutting formula drainage groove, guaranteeing drainage groove safety, under long-term service condition, more can take into account the balance of investment and later maintenance expense, in design period, total investment of engineering reduces by 20～40%.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view of ladder-Shuangtan structural type mountain torrents debris flow drainage groove.
Fig. 2 is the lateral longitudinal generalized section of ladder-Shuangtan structural type mountain torrents debris flow drainage groove.
Fig. 3 is the groove heart vertical section schematic diagram of ladder-Shuangtan structural type mountain torrents debris flow drainage groove.
Fig. 4 is the groove heart vertical section enlarged diagram of ladder-Shuangtan structural type mountain torrents debris flow drainage groove.
Fig. 5 is the Shuangtan Duan Shangtan cross sectional representation of ladder-Shuangtan structural type mountain torrents debris flow drainage groove.
Fig. 6 is Duan Xia pool, the Shuangtan cross sectional representation of ladder-Shuangtan structural type mountain torrents debris flow drainage groove.
Fig. 7 is the ladder section cross sectional representation of ladder-Shuangtan structural type mountain torrents debris flow drainage groove.
Number in the figure is as follows:
1 side wall 2 ladder sections
3 upper end notched sill 4 lower end notched sills
Pool rigidity river bottom protection on 5 base plates 6
Pool piece stone on 7 cable wire net cage body power consumption layers 8
10 times pool piece stones of 9 times pool rigidity river bottom protection
Notched sill between 11 pools
I
1i falls in ladder section ratio
0the average longitudinal river slope of ditch bed
The B bottom land width H drainage groove degree of depth
H
1lower end notched sill height h
11lower end notched sill flying height
H
12upper pool piece stone laying depth h
13cable wire net cage body power consumption layer thickness
H
14upper pool rigidity river bottom protection thickness h
2notched sill height between pool
H
21notched sill flying height h between pool
22lower pool piece stone laying depth
H
23lower pool rigidity river bottom protection thickness h
3upper end notched sill height
L
1ladder segment length L
2upper pool length
L
3notched sill width L between pool
4lower pool length
L
5shuangtan segment length
The specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are further described.
Embodiment mono-
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7.Certain mountain torrents debris flow gully drainage area 1.64km
2, in order to control flush flood and debris flow disaster, planning arranges 1 of debris dam at middle part, basin, piles up on fan and build drainage groove 180m.For drainage groove, the average longitudinal river slope i of subslot bed
0be 0.5, excretion mountain torrents mud-rock flow design discharge 82m
3/ s, the maximum unit weight 21.0kN/m of design flash flood debris flow body
3; In order to control the strong abrasion of mountain torrents mud-rock flow and souring, adopt ladder-Shuangtan structural type mountain torrents debris flow drainage groove.Ladder-Shuangtan structural type mountain torrents debris flow drainage groove comprises the drainage groove side wall 1 of drainage groove bottom land and both sides thereof, and described drainage groove bottom land comprises ladder section 2 and the Shuangtan section of filling between upstream and downstream ladder section 2 of some full lining cutting that arrange at a certain distance.Ladder section 2 comprise be positioned at upstream upper end notched sill 3, be positioned at the lower end notched sill 4 in downstream and connect the full lining cutting base plate 5 of upper end notched sill 3 and lower end notched sill 4.Described Shuangtan section comprises in the upper pool of upstream, in the lower pool in downstream and notched sill 11 between the pool between Shang Tan and lower pool; Between upper pool end face and pool, notched sill 11 end faces are concordant, and lower pool end face is concordant with the highest point of downstream ladder section 2.Described upper pool comprises pool rigidity river bottom protection 6, the cable wire net cage body power consumption layer 7 that the cable wire net cage body of being located at rigidity river bottom protection 6 tops, pool, be cable wire net parcel piece stone by some structures forms, and be located at notched sill 11 between side wall 1, cable wire net cage body power consumption layer 7, upstream step section 2 lower end notched sills 4 and pool and surround the upper pool piece stone 8 in space.Described lower pool comprises lower pool rigidity river bottom protection 9, and is located at notched sill 11 between side wall 1, lower pool rigidity river bottom protection 9, downstream ladder section 2 upper end notched sills 3 and pool and surrounds the lower pool piece stone 10 in space.Between upstream step section 2 lower end notched sill 4 end faces and upper pool end face, be provided with lower end notched sill 4 flying height h
11, between pool, between notched sill 11 end faces and lower pool end face, be provided with notched sill 11 flying height h between pool
21.
According to the actual conditions in mountain torrents mud-rock flow region---excretion mountain torrents mud-rock flow design discharge 82m
3/ s, the average longitudinal river slope i of subslot bed
0be 0.5, the maximum unit weight 21.0kN/m of design flash flood debris flow body
3, planning and designing drainage groove bottom land width B is that 8.0m, drainage groove depth H are 2.5m.
According to the maximum unit weight of design flash flood debris flow body, determine upper pool length L
2get 3.0m, lower pool length L
4get 1.5m; According to the average longitudinal river slope i of ditch bed
0, determine notched sill 11 width L between pool
3get 1.5m; And then definite Shuangtan segment length L
5=L
2+ L
4=L
3=3.0+1.5+1.5=6.0m.Full lining cutting base plate 5 adopts reinforced concrete structure, and thickness is got 1.0m, and ladder section 2 is than falling i
1get 0.15, ladder section 2 length L
1get 6.0m.The particle diameter of upper pool piece stone 8 and lower pool piece stone 10 is got 0.5m.
Lower end notched sill 4 flying height h
11and notched sill 11 flying height h between pool
21sum h
11+ h
21=(L
1+ L
5) × i
0-L
1× i
1=(6.0+6.0) × 0.5-6.0 × 0.15=5.1m, and then definite lower end notched sill 4 flying height h
11get 2.8m, notched sill 11 flying height h between pool
21get 2.3m.
According to the maximum unit weight of design flash flood debris flow body and lower end notched sill 4 flying height h
11, pool piece stone 8 laying depth h in planning
12get 1.0m, cable wire net cage body power consumption layer 7 thickness h
13get 1.0m, upper pool rigidity river bottom protection 6 thickness h
14get 1.0m.According to notched sill 11 flying height h between the maximum unit weight of design flash flood debris flow body and pool
21, the lower pool piece stone 10 laying depth h of planning
22get 1.0m, lower pool rigidity river bottom protection 9 thickness h
23get 1.0m.
According to the maximum unit weight of design flash flood debris flow body and lower end notched sill 4 flying height h
11plan cable wire net cage body power consumption layer 7, length and the wide 1.5m of getting, the height of cable wire net cage body are got 1.0m, and cable wire net mesh size is got 0.2m × 0.2m, and rope diameter is got 0.01m, and in the cable wire net of cable wire net cage body, the particle diameter of parcel piece stone is more than or equal to 0.4m.
To sum up, the key parameter of ladder-Shuangtan structural type mountain torrents debris flow drainage groove is: drainage groove bottom land width B is that 8.0m, drainage groove depth H are 2.5m; For ladder section 2, ladder section 2 is than falling i
1be 0.15, ladder section 2 length L
1for 6.0m, upper end notched sill 3 height h
3for 2.0m, lower end notched sill 4 height h
1for 5.8m, it is 1.0m that full lining cutting base plate 5 adopts reinforced concrete structure, thickness; For upper pool, upper pool length L
2for 3.0m, lower end notched sill 4 flying height h
11for 2.8m, upper pool piece stone 8 laying depth h
12for 1.0m, particle diameter are 0.5m, cable wire net cage body power consumption layer 7 thickness h
13for 1.0m, upper pool rigidity river bottom protection 6 thickness h
14for 1.0m, the length of cable wire net cage body and wide be 1.5m, high be 1.0m, cable wire net mesh size be 0.2m × 0.2m, rope diameter is 0.01m, the interior particle diameter that wraps up piece stone of cable wire net is not less than 0.4m; For lower pool, lower pool length L
4for 1.5m, notched sill 11 flying height h between pool
21for 2.3m, lower pool piece stone 10 laying depth h
22for 1.0m, particle diameter are 0.5m, lower pool rigidity river bottom protection 9 thickness h
23for 1.0m; For notched sill between pool 11, notched sill 11 width L between pool
3for 1.5m, notched sill 11 height h between pool
2for 4.3m.
Embodiment bis-
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7.Certain mountain torrents debris flow gully drainage area 4.6km
2, in order to control flush flood and debris flow disaster, planning arranges 2 of debris dams at middle part, basin, piles up on fan and build drainage groove 370m.For drainage groove, the average longitudinal river slope i of subslot bed
0be 0.3, excretion mountain torrents mud-rock flow design discharge 136m
3/ s, the maximum unit weight 15.0kN/m of design flash flood debris flow body
3; In order to control the strong abrasion of mountain torrents mud-rock flow and souring, adopt ladder-Shuangtan structural type mountain torrents debris flow drainage groove.Ladder-Shuangtan structural type mountain torrents debris flow drainage groove comprises the drainage groove side wall 1 of drainage groove bottom land and both sides thereof, and described drainage groove bottom land comprises ladder section 2 and the Shuangtan section of filling between upstream and downstream ladder section 2 of some full lining cutting that arrange at a certain distance.Ladder section 2 comprise be positioned at upstream upper end notched sill 3, be positioned at the lower end notched sill 4 in downstream and connect the full lining cutting base plate 5 of upper end notched sill 3 and lower end notched sill 4.Described Shuangtan section comprises in the upper pool of upstream, in the lower pool in downstream and notched sill 11 between the pool between Shang Tan and lower pool; Between upper pool end face and pool, notched sill 11 end faces are concordant, and lower pool end face is concordant with the highest point of downstream ladder section 2.Described upper pool comprises pool rigidity river bottom protection 6, the cable wire net cage body power consumption layer 7 that the cable wire net cage body of being located at rigidity river bottom protection 6 tops, pool, be cable wire net parcel piece stone by some structures forms, and be located at notched sill 11 between side wall 1, cable wire net cage body power consumption layer 7, upstream step section 2 lower end notched sills 4 and pool and surround the upper pool piece stone 8 in space.Described lower pool comprises lower pool rigidity river bottom protection 9, and is located at notched sill 11 between side wall 1, lower pool rigidity river bottom protection 9, downstream ladder section 2 upper end notched sills 3 and pool and surrounds the lower pool piece stone 10 in space.Between upstream step section 2 lower end notched sill 4 end faces and upper pool end face, be provided with lower end notched sill 4 flying height h
11, between pool, between notched sill 11 end faces and lower pool end face, be provided with notched sill 11 flying height h between pool
21.
According to the actual conditions in mountain torrents mud-rock flow region---excretion mountain torrents mud-rock flow design discharge 136m
3/ s, the average longitudinal river slope i of subslot bed
0be 0.3, the maximum unit weight 15.0kN/m of design flash flood debris flow body
3, planning and designing drainage groove bottom land width B is that 9.0m, drainage groove depth H are 4.5m.
According to the maximum unit weight of design flash flood debris flow body, determine upper pool length L
2get 1.5m, lower pool length L
4get 1.0m; According to the average longitudinal river slope i of ditch bed
0, determine notched sill 11 width L between pool
3get 1.0m; And then definite Shuangtan segment length L
5=L
2+ L
4=L
3=1.5+1.0+1.0=3.5m.Full lining cutting base plate 5 adopts stone masonry structure, and thickness is got 0.5m, and ladder section 2 is than falling i
1get 0.08, ladder section 2 length L
1get 10.5m.The particle diameter of upper pool piece stone 8 and lower pool piece stone 10 is got 0.2m.
Lower end notched sill 4 flying height h
11and notched sill 11 flying height h between pool
21sum h
11+ h
21=(L
1+ L
5) × i
0-L
1× i
1=(3.5+10.5) × 0.3-10.5 × 0.08=3.36m, and then definite lower end notched sill 4 flying height h
11get 2.0m, notched sill 11 flying height h between pool
21get 1.36m.
According to the maximum unit weight of design flash flood debris flow body and lower end notched sill 4 flying height h
11, pool piece stone 8 laying depth h in planning
12get 0.5m, cable wire net cage body power consumption layer 7 thickness h
13get 0.5m, upper pool rigidity river bottom protection 6 thickness h
14get 0.4m.According to notched sill 11 flying height h between the maximum unit weight of design flash flood debris flow body and pool
21, the lower pool piece stone 10 laying depth h of planning
22get 0.5m, lower pool rigidity river bottom protection 9 thickness h
23get 0.4m.
According to the maximum unit weight of design flash flood debris flow body and lower end notched sill 4 flying height h
11plan cable wire net cage body power consumption layer 7, the length of cable wire net cage body is got 3.0m, the wide 1.5m of getting, height is got 0.5m, and cable wire net mesh size is got 0.1m × 0.1m, and rope diameter is got 0.005m, and in the cable wire net of cable wire net cage body, the particle diameter of parcel piece stone is more than or equal to 0.12m.
To sum up, the key parameter of ladder-Shuangtan structural type mountain torrents debris flow drainage groove is: drainage groove bottom land width B is that 9.0m, drainage groove depth H are 4.5m; For ladder section 2, ladder section 2 is than falling i
1be 0.08, ladder section 2 length L
1for 10.5m, upper end notched sill 3 height h
3for 0.9m, lower end notched sill 4 height h
1for 3.4m, it is 0.5m that full lining cutting base plate 5 adopts stone masonry structure, thickness; For upper pool, upper pool length L
2for 1.5m, lower end notched sill 4 flying height h
11for 2.0m, upper pool piece stone 8 laying depth h
12for 0.5m, particle diameter are 0.2m, cable wire net cage body power consumption layer 7 thickness h
13for 0.5m, upper pool rigidity river bottom protection 6 thickness h
14for 0.4m, the length of cable wire net cage body is 3.0m, wide for 1.5m, height are 0.5m, cable wire net mesh size is 0.1m × 0.1m, and rope diameter is 0.005m, and in cable wire net, the particle diameter of parcel piece stone is not less than 0.12m; For lower pool, lower pool length L
4for 1.0m, notched sill 11 flying height h between pool
21for 1.36m, lower pool piece stone 10 laying depth h
22for 0.5m, particle diameter are 0.2m, lower pool rigidity river bottom protection 9 thickness h
23for 0.4m; For notched sill between pool 11, notched sill 11 width L between pool
3for 1.0m, notched sill 11 height h between pool
2for 2.26m.
Claims (10)
1. one species stage-Shuangtan structural type mountain torrents debris flow drainage groove, the drainage groove side wall (1) that comprises drainage groove bottom land and both sides thereof, is characterized in that: described drainage groove bottom land comprises ladder section (2) and the Shuangtan section of filling between upstream and downstream ladder section (2) of some full lining cutting that arrange at a certain distance; Ladder section (2) comprise be positioned at upstream upper end notched sill (3), be positioned at the lower end notched sill (4) in downstream and connect upper end notched sill (3) and the full lining cutting base plate (5) of lower end notched sill (4); Described Shuangtan section comprise in the upper pool of upstream, in the lower pool in downstream and between the pool between Shang Tan and lower pool notched sill (11), between upper pool end face and pool, notched sill (11) end face is concordant, lower pool end face is concordant with the highest point of downstream ladder section (2); Described upper pool comprises pool rigidity river bottom protection (6), the cable wire net cage body power consumption layer (7) that the cable wire net cage body of being located at pool rigidity river bottom protection (6) top, be cable wire net parcel piece stone by some structures forms, and be located at notched sill (11) between side wall (1), cable wire net cage body power consumption layer (7), upstream step section (2) lower end notched sill (4) and pool and surround the upper pool piece stone (8) in space; Described lower pool comprises lower pool rigidity river bottom protection (9), and is located at notched sill (11) between side wall (1), lower pool rigidity river bottom protection (9), downstream ladder section (2) upper end notched sill (3) and pool and surrounds the lower pool piece stone (10) in space; Between upstream step section (2) lower end notched sill (4) end face and upper pool end face, be provided with lower end notched sill (4) flying height h
11, between (11) end face of notched sill between pool and lower pool end face, be provided with notched sill between pool (11) flying height h
21.
2. ladder-Shuangtan according to claim 1 structural type mountain torrents debris flow drainage groove, is characterized in that: described Shuangtan segment length L
5be more than or equal to ladder section (2) length L
11/3rd, be less than or equal to ladder section (2) length L simultaneously
1; Shuangtan segment length L
5equal pool length L
2, lower pool length L
4and notched sill (11) width L between pool
3sum.
3. ladder-Shuangtan according to claim 2 structural type mountain torrents debris flow drainage groove, is characterized in that: lower end notched sill (4) height h
1equal lower end notched sill (4) flying height h
11, upper pool piece stone (8) laying depth h
12, cable wire net cage body power consumption layer (7) thickness h
13and upper pool rigidity river bottom protection (6) thickness h
14sum; Notched sill between pool (11) height h
2equal notched sill between pool (11) flying height h
21, lower pool piece stone (10) laying depth h
22and lower pool rigidity river bottom protection (9) thickness h
23sum; Lower end notched sill (4) flying height h
11be more than or equal to notched sill between pool (11) flying height h
21; Upper end notched sill (3) height h
3equal lower pool piece stone (10) laying depth h
22with lower pool rigidity river bottom protection (9) thickness h
23sum.
4. ladder-Shuangtan according to claim 3 structural type mountain torrents debris flow drainage groove, is characterized in that: lower end notched sill (4) flying height h
11and notched sill between pool (11) flying height h
21sum h
11+ h
21=(L
1+ L
5) × i
0-L
1× i
1; L in formula
1for ladder section (2) length, L
5for Shuangtan segment length, i
0for the average longitudinal river slope of ditch bed, value is 0.3-0.5, i
1for ladder section (2) is than falling, value is 0.08-0.15.
5. ladder-Shuangtan according to claim 4 structural type mountain torrents debris flow drainage groove, is characterized in that: lower end notched sill (4) flying height h
11be less than or equal to 2.8m, upper pool piece stone (8) laying depth h
12for 0.5-1.0m, cable wire net cage body power consumption layer (7) thickness h
13for 0.5-1.0m, upper pool rigidity river bottom protection (6) thickness h
14for 0.4-1.0m.
6. ladder-Shuangtan according to claim 4 structural type mountain torrents debris flow drainage groove, is characterized in that: notched sill between pool (11) flying height h
21be less than or equal to 2.3m, lower pool piece stone (10) laying depth h
22for 0.5-1.0m, lower pool rigidity river bottom protection (9) thickness h
23for 0.4-1.0m.
7. ladder-Shuangtan according to claim 4 structural type mountain torrents debris flow drainage groove, is characterized in that: notched sill between pool (11) width L
3for 1.0-1.5m, upper pool length L
2for 1.5-3.0m, lower pool length L
4for 1.0-1.5m, ladder section (2) length L
1for 6.0-10.5m.
8. according to the arbitrary described ladder-Shuangtan structural type mountain torrents debris flow drainage groove of claim 1-7, it is characterized in that: the length of described cable wire net cage body and the wide 1.5-3.0m of being, height is 0.5-1.0m; The cable wire net mesh size of described cable wire net cage body is 0.1m × 0.1m-0.2m × 0.2m, and rope diameter is 0.005-0.01m, and the minimum grain size that wraps up piece stone in cable wire net is 1.2-2.0 times of cable wire net mesh diameter.
9. according to the arbitrary described ladder-Shuangtan structural type mountain torrents debris flow drainage groove of claim 1-7, it is characterized in that: base plate (5) is stone masonry structure or concrete structure or reinforced concrete structure, and thickness is 0.5-1.0m; The ratio of drainage groove bottom land width B and drainage groove depth H is more than or equal to 2.0.
10. the application of ladder-Shuangtan as claimed in claim 1 structural type mountain torrents debris flow drainage groove, is characterized in that: be applicable to the average longitudinal river slope i of ditch bed
0for mountain torrents and the debris flow drainage of 0.3-0.5 are led.
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| CN103806410B (en) | 2015-12-02 |
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