CN105568923A - Flood diversion pipe band group of dam for above standard flood - Google Patents

Abstract

A flood diversion pipe band group of a dam for above standard flood belongs to the technical field of hydraulic engineering of dam flood diversion. In case that above standard flood comes, the flood diversion pipe band group is capable of realizing flood diversion to prevent an embankment from bursting; and the flood diversion pipe band group has the advantages of simple structure, finalized design and production, convenient transportation, fast construction, and low manufacturing cost. The flood diversion pipe band group comprises inlet hafnium U-shaped grooves, cage type trash racks, HDPE flap valves, flood diversion pipe bodies, outlet hafnium U-shaped grooves, water delivery bands each having a rigid framework and made of an artificially synthesized material, aprons of a geotechnical synthetic material, sandbag baffle sills, and color strip cloth sandbag scour prevention sections; the flood diversion pipe bodies along with the water delivery bands each having the rigid framework and made of the artificially synthesized material are arranged at equal distances and in parallel, and therefore, the flood diversion pipe band group of the same flood diversion point is constructed as required. The flood diversion pipe band group is arranged dispersedly along two sides, and capable of implementing temporary controllable flood diversion to a farmland at any place without permanently occupying the cultivated land; no special flood retarding basin is needed, and great calamity caused by concentrated flood diversion, and high-investment whole-line flood fighting can be avoided; the detachable and combinable flood diversion pipe band group can be quickly constructed when flood diversion is needed during flood-fighting and emergency rescues, and is convenient to use and manage.

Description

The flood diversion pipe racks group of dykes and dams super standard flood

Technical field

The invention belongs to dykes and dams flood diversion hydraulic engineering technical field, be specifically related to a kind of flood diversion pipe racks group of dykes and dams super standard flood.

Background technology

Flood diversion on sub-bottom changes (flood discharge) building form has flood-diversion sluice, crosses water and soil dam, buried penstock under dam, glory hole spillway, siphon spillways and people is at present flood diversion of breaching a dyke.On lower river dyke, because upstream and downstream head difference is less, siphon spillways baric flow advantage is not obvious.Must strengthen siphon spillways section to reach corresponding point of magnanimity, cost also must be high, and point magnanimity is directly proportional to 1/2 power of acting head H in addition, and the super ability of letting out of chance super standard flood is low, should not select; Buried penstock under dam, glory hole spillway also exist to surpass lets out the shortcoming that ability is low, cost is high, should not select; The water and soil dam excessively of steel concrete revetment, for lower dykes and dams, raise elevation of weir crest and be arranged to water and soil dam, the wide flood diversion limited flow of the little list of weir head, must increase the wide overall cost in weir must be high, if reduce elevation of weir crest to increase weir head and just must establish gate dash and to let out groove short, it is close to flood-diversion sluice structure; Open type steel concrete flood-diversion sluice point magnanimity is directly proportional to 3/2 power of weir head H, has to surpass to let out ability, and it is optimal selection at present.

But, there is the river dike of flood-diversion sluice at present, be not suitable for adopting little flood-diversion sluice dispersed placement, because what Han Qu increased is the retaining wall that cost is high, so in Han Qu centralized arrangement flood diversion often, flood diversion is concentrated and just directly to farmland flood diversion, can not be needed suitable lake, bubble pool or low-lying land as detention basin, must build detention basin embankment; Reduce flood-diversion sluice cost for increasing flood diversion flow, flood-diversion sluice elevation of weir crest wants cloth to set low, and with regard to the structural configuration that basis of formation is buried, thus also just there is seepage failure hidden danger, freeze injury, aging problem; Flood-diversion sluice must arrange fixing Service gate and headstock gear must need Emergency Gate, and be equipped with service bridge and maintenance bridge, also need if desired to build access bridge because block traffic, cost is high, and needs special messenger's Maintenance and Management gate, headstock gear for this reason; Concentrate the flood-diversion sluice tail water of flood diversion to need the permanent floodways such as canal, ditch or river, the not single cost height of flood-diversion sluice, embankment engineering also for good and all occupies a large amount of land resources; Build existing open type steel concrete flood-diversion sluice building cycle long, can not build during burst flood temporarily; And the probability that steel concrete flood-diversion sluice starts is low, once start flood diversion, lasting of flood diversion is short, uses chance few, and the quantity that a large amount of river dikes need build flood-diversion sluice is too large, and this is often also restricted economically.The rising suddenly and sharply of upstream mountain stream breaks, and to arrange flood-diversion sluice uneconomical in short distance river course, meet super standard flood must breach a dyke, and cost high flood-diversion sluice protection region be worth little flood-diversion sluice of also should not building, dyke without flood-diversion sluice runs into super standard flood flood fighting completely, a large amount of personnel can only be dropped into carry out along the line building interim small dike's dash, along with drawdown also will be removed in time, prevent female dike from coming down, run into irresistible extraodinary flood once burst, uncontrollable a large amount of flood is concentrated to gush out and is wreaked havoc, suffer heavy losses, this situation happens occasionally, if people is flood diversion of breaching a dyke, the loss that uncontrollable concentrated flood causes also can be very large, and, once a vast expanse of water inside and outside breach dike, at this moment fetch earth not single cost height also not a duck soup of blocking up.

Summary of the invention

The object of this invention is to provide a kind of flood diversion pipe racks group of dykes and dams super standard flood, when running into super standard flood, can flood diversion prevent the unrestrained top of dykes and dams to burst; And structure is simple, recover after flood diversion to plough, forever do not occupy cultivated land, convenient transportation, construction are quick, flood diversion can be disperseed along two sides, use management is convenient, cost is low, and the flood-diversion sluice infrequently enabled both can have been replaced as flood diversion in flood season can also to protect the emergency measure of dykes and dams.

Realize above-mentioned purpose, the technical scheme that the present invention takes is as follows:

The flood diversion pipe racks group of dykes and dams super standard flood of the present invention, described flood diversion pipe racks group comprises several flood diversion pipe racks, and several flood diversion pipe racks described include import hafnium U-type groove, cage trashrack, HDPE flap valve, flood diversion pipe shaft, outlet hafnium U-type groove, the Flexible water pipe of rigid backbone synthetic material, the absorption basin protection-apron of two-stage geosynthetics, two-stage sandbag baffle wall style and colour bar cloth sandbag erosion control section;

The absorption basin protection-apron of described two-stage geosynthetics is the absorption basin protection-apron of one-level geosynthetics and the absorption basin protection-apron of secondary geosynthetics respectively, described two-stage sandbag baffle wall style is one-level sandbag baffle wall style and secondary sandbag baffle wall style respectively, described cage trashrack is placed in import hafnium U-type groove, described HDPE flap valve is placed in cage trashrack, HDPE flap valve is fixed on flood diversion pipe shaft entrance point, described flood diversion pipe shaft is horizontally set on dykes and dams top, and flood diversion pipe shaft entrance point is positioned at import hafnium U-type groove and cage trashrack, the port of export of flood diversion pipe shaft is provided with outlet hafnium U-type groove, the arrival end of the Flexible water pipe of described rigid backbone synthetic material is connected with flood diversion pipe shaft 6 port of export, the port of export of the Flexible water pipe of rigid backbone synthetic material to be placed on slope, described dykes and dams downstream and to be arranged on the absorption basin protection-apron of one-level geosynthetics, the absorption basin protection-apron of described one-level geosynthetics is laid on beach or field, the absorption basin protection-apron upstream extremity of one-level geosynthetics is placed on slope, dykes and dams downstream, the absorption basin protection-apron downstream of one-level geosynthetics is connected with one-level sandbag baffle wall style, the absorption basin protection-apron upstream of described secondary geosynthetics is connected with one-level sandbag baffle wall style, the absorption basin protection-apron of secondary geosynthetics is laid on beach or field, the absorption basin protection-apron downstream of secondary geosynthetics is connected with secondary sandbag baffle wall style, described colour bar cloth sandbag erosion control section is laid on beach or field, colour bar cloth sandbag erosion control section upstream extremity is connected with secondary sandbag baffle wall style, described one-level sandbag baffle wall style is disposed adjacent with the Flexible water pipe of rigid backbone synthetic material, all flood diversion pipe shafts in described flood diversion pipe racks group are all equidistantly set up in parallel, the Flexible water pipe of all rigid backbone synthetic materials in flood diversion pipe racks group is equidistantly arranged all side by side.

The present invention relative to the beneficial effect of prior art is:

Long for the existing steel concrete flood-diversion sluice construction period infrequently enabled, cost is high, flood diversion is concentrated, forever occupy cultivated land, and need the restriction of strict detention basin condition feature and without the dyke flood fighting completely of flood-diversion sluice and uncontrollable feature of bursting, invented the flood diversion pipe racks group of dykes and dams super standard flood; When running into super standard flood, adopting technical scheme of the present invention can controlled flood diversion, preventing dyke not burst.In addition, the present invention also have forever do not occupy cultivated land, dispersible that flood diversion, structure are simple, modular in design and production, convenient transportation, construction is quick, use management is convenient, cost is low feature, be applicable to the controlled flood diversion in any place, be also applicable in flood-fighting.Above-mentioned beneficial effect is in particular in:

1, flood diversion pipe shaft flood diversion flow is limited by flood diversion inner cavity of tube body diameter.The Flexible water pipe of flood diversion pipe shaft and rigid backbone synthetic material is formed with baric flow increases a point magnanimity, reduces flood diversion pipe shaft caliber, can reduce flood diversion pipe shaft engineering quantity.

2, cage trashrack ensures that the Flexible water pipe of rigid backbone synthetic material and geosynthetics cross water security, increases the Flexible water pipe of cheap rigid backbone synthetic material, and geosynthetics is not obvious on overall cost impact.

3, flood diversion pipe shaft is arranged in dykes and dams top, the length of flood diversion pipe shaft is short, what increase is the Flexible water pipe of cheap rigid backbone synthetic material, not single cost is low and construction is easy, increase the Flexible water pipe quantity of flood diversion pipe shaft and rigid backbone synthetic material, pipe with small pipe diameter, the shorter flood diversion pipe shaft engineering quantity of length increases not obvious, multiplely to be combined as required for arranging, the Flexible water pipe of dispersed placement flood diversion pipe shaft and rigid backbone synthetic material provides condition, also for adopting HDPE flap valve to provide condition, flood diversion pipe shaft is imbedded in dykes and dams and is not affected traffic, greatly cost is reduced to there being the dykes and dams of traffic requirement.

4, the HDPE flap valve flood diversion of flood diversion pipe shaft entrance point is arranged on, because the HDPE flap valve depth of water is little, break down and easily process, can not establish Emergency Gate and maintenance bridge, because hoisting capacity is little, manpower can pull-up and close HDPE flap valve, also just service bridge need not be built without the need to headstock gear, very big reduction construction costs, use management is convenient, and adopting does not have low antitheft, transport when speedily carrying out rescue work again of the lightweight HDPE flap valve cost of recovery value, sets up conveniently temporarily.

5, the Flexible water pipe of rigid backbone synthetic material replaces hafnium pipe that water is transported to downstream absorption basin; Dissipation and scouring adopts geosynthetics to do protection-apron.Take off the Flexible water pipe of rigid backbone synthetic material after the flood diversion phase, geosynthetics recovers to plough.Arranged by the Flexible water pipe of cage trashrack, HDPE flap valve, flood diversion pipe shaft, rigid backbone synthetic material and the geosynthetics new structure forming dissipation and scouring that interdepends; Form novel flood diversion building dismantled and assembled, capable of being combined; Such the present invention just achieves and adopts light-duty material convenient transportation, it is quick to tear down and build, without fixed gate, without headstock gear, non-flood diversion phase unattended maintenance, without freeze injury, without hidden danger, forever do not occupy arable land, dispersible capable of being combined, controlled to farmland flood diversion, target that cost is low; Also achieve and do not possess the dykes and dams building flood-diversion sluice or do not have flood-diversion sluice and also controlled flood diversion can protect the target of dykes and dams; The present invention both can replace the flood-diversion sluice infrequently enabled can also protect the emergency measure of dykes and dams as flood diversion in flood season; Flood diversion form on the existing sub-bottom changes of the strategic structural of combination of materials of the present invention, structural arrangement form, dismounting and associativity.

5, the present invention is applied to the flood diversion pipe shaft of the Flexible water pipe of colour bar cloth, rigid backbone synthetic material, geosynthetics and Pe, Pvc or Pp material and colour bar cloth sandbag erosion control section on the flood diversion building of dykes and dams super standard flood, because several years recurrence interval of dykes and dams flood diversion is to decades, each several days flood diversion time is short by the duration of sunshine by tens days, can not be there is aging, intensity change in these materials, these materials can reuse.

6, flood diversion pipe racks group of the present invention, multiple flood diversion pipe racks of caliber that waits is laid formation flood diversion pipe racks group side by side, to meet the needs of total score mighty torrent amount, multiple flood diversion pipe racks combines as required, equidistant dispersed placement, reach restriction discharge per unit width object, energy dissipating is easy, employing geosynthetics is made to carry out dissipation and scouring and interim flood diversion does not forever occupy arable land and becomes feasible to farmland, speedily carrying out rescue work can on-the-spot rapid-assembling, and the Flexible water pipe pressure flow also solving flood diversion pipe shaft and rigid backbone synthetic material by increasing pipe racks quantity surpasses the low problem of the ability of letting out.Flood diversion pipe racks group can dispersible layout along two sides, what its increased is only the geosynthetics of dissipation and scouring avris, very little to cost influence, break through the restriction that existing flood diversion needs special detention basin, and both achieved that the interim flood diversion to farmland does not forever occupy cultivated land, the target of the controlled flood diversion in any place and dispersion flood diversion, also avoid concentrated flood diversion simultaneously and bring extinction, thus avoid flood fighting completely.To sum up, the present invention is arranged by combination of materials, new structure, forms novel flood diversion building dismantled and assembled, capable of being combined, protects dykes and dams for flood-fighting flood diversion.

" super standard flood " that the present invention relates to refers to the standard exceeding dykes and dams check flood for the dykes and dams reaching planning and designing standard, refer to exceed its highest existing standard of flood for the dykes and dams not reaching planning and designing standard." dykes and dams " that the present invention relates to are for the river dike of below 10m or ditch head dam across a river.The rivers related to rise suddenly and sharply river in non-mountain area.

Accompanying drawing explanation

Fig. 1 is the front view of the flood diversion pipe racks group of dykes and dams super standard flood of the present invention;

Fig. 2 is the A place partial enlarged drawing of Fig. 1;

Fig. 3 is the B place partial enlarged drawing of Fig. 1;

Fig. 4 is the top view of Fig. 1.

Wherein, dykes and dams 1, small dike 2, import hafnium U-type groove 3, cage trashrack 4, HDPE flap valve 5, flood diversion pipe shaft 6, outlet hafnium U-type groove 7, the Flexible water pipe 8 of rigid backbone synthetic material, the absorption basin protection-apron 9-1 of one-level geosynthetics, absorption basin protection-apron 9-2, the one-level sandbag baffle wall style 10-1 of secondary geosynthetics, secondary sandbag baffle wall style 10-2, colour bar cloth sandbag erosion control section 11.

Detailed description of the invention

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

Detailed description of the invention one: as shown in Figure 1 to 4, the flood diversion pipe racks group of the dykes and dams super standard flood of present embodiment, described flood diversion pipe racks group comprises several flood diversion pipe racks, and several flood diversion pipe racks described include import hafnium U-type groove 3, cage trashrack 4, HDPE flap valve 5, flood diversion pipe shaft 6, outlet hafnium U-type groove 7, the Flexible water pipe 8 of rigid backbone synthetic material, the absorption basin protection-apron of two-stage geosynthetics, two-stage sandbag baffle wall style and colour bar cloth sandbag erosion control section 11;

The absorption basin protection-apron of described two-stage geosynthetics is the absorption basin protection-apron 9-1 of one-level geosynthetics and the absorption basin protection-apron 9-2 of secondary geosynthetics respectively, described two-stage sandbag baffle wall style is one-level sandbag baffle wall style 10-1 and secondary sandbag baffle wall style 10-2 respectively, described cage trashrack 4 is placed in import hafnium U-type groove 3, described HDPE flap valve 5 is placed in cage trashrack 4, HDPE flap valve 5 is fixed on flood diversion pipe shaft 6 entrance point, described flood diversion pipe shaft 6 is horizontally set on dykes and dams 1 top, and flood diversion pipe shaft 6 entrance point is positioned at import hafnium U-type groove 3 and cage trashrack 4, the port of export of flood diversion pipe shaft 6 is provided with outlet hafnium U-type groove 7, the arrival end of the Flexible water pipe 8 of described rigid backbone synthetic material is connected with flood diversion pipe shaft 6 port of export, the port of export of the Flexible water pipe 8 of rigid backbone synthetic material to be placed on slope, described dykes and dams 1 downstream and to be arranged on the absorption basin protection-apron 9-1 of one-level geosynthetics, the absorption basin protection-apron 9-1 of described one-level geosynthetics is laid on beach or field, the absorption basin protection-apron 9-1 upstream extremity of one-level geosynthetics is placed on slope, dykes and dams 1 downstream, the absorption basin protection-apron 9-1 downstream of one-level geosynthetics is connected with one-level sandbag baffle wall style 10-1, the absorption basin protection-apron 9-2 upstream of described secondary geosynthetics is connected with one-level sandbag baffle wall style 10-1, the absorption basin protection-apron 9-2 of secondary geosynthetics is laid on beach or field, the absorption basin protection-apron 9-2 downstream of secondary geosynthetics is connected with secondary sandbag baffle wall style 10-2, described colour bar cloth sandbag erosion control section 11 is laid on beach or field, colour bar cloth sandbag erosion control section 11 upstream extremity is connected with secondary sandbag baffle wall style 10-2, described one-level sandbag baffle wall style 10-1 is disposed adjacent with the Flexible water pipe 8 of rigid backbone synthetic material, all flood diversion pipe shafts 6 in described flood diversion pipe racks group are all equidistantly set up in parallel, the Flexible water pipe 8 of all rigid backbone synthetic materials in flood diversion pipe racks group is equidistantly arranged all side by side.

Detailed description of the invention two: as shown in Fig. 1 and Fig. 4, the flood diversion pipe racks group of the dykes and dams super standard flood described in detailed description of the invention one, Flexible water pipe 8 intracavity diameter of described flood diversion pipe shaft 6 and rigid backbone synthetic material all adopts following formulae discovery: $d=\sqrt{\frac{4Q}{{\mathrm{\π\μ}}_{c}n\sqrt{2{\mathrm{gH}}_0}}}$ Formula one

${\mathrm{\μ}}_c=\frac{1}{\sqrt{1+\mathrm{\λ}\frac{l}{d}+\Σ\mathrm{\ζ}}}$ Formula two

$H_0=H+\frac{{\mathrm{\αV}}_0^2}{2g}$ Formula three

In formula: d---be Flexible water pipe 8 intracavity diameter of flood diversion pipe shaft 6 or rigid backbone synthetic material, m;

Q---be the flood diversion pipe racks group flow of flood diversion point, m ³/ s;

π---be pi;

μ _c---be Flexible water pipe 8 discharge coefficient of flood diversion pipe shaft 6 or rigid backbone synthetic material;

N---be the flood diversion pipe shaft 6 of flood diversion pipe racks group or Flexible water pipe 8 quantity of rigid backbone synthetic material;

G---be acceleration of gravity, m ²/ s;

H, H ₀---be respectively the acting head not comprising approach velocity head He comprise approach velocity head;

λ---be Flexible water pipe 8 frictional resistant coefficient of flood diversion pipe shaft 6 or rigid backbone synthetic material;

L---be the Flexible water pipe 8 compute segment length of flood diversion pipe shaft 6 or rigid backbone synthetic material, m;

∑ ζ---be total losses coefficient sum in Flexible water pipe 8 compute segment of flood diversion pipe shaft 6 or rigid backbone synthetic material;

α---be kinetic energy correction factor;

V ₀---be approach velocity, m/s.

Detailed description of the invention three: as shown in Fig. 1 and Fig. 4, the flood diversion pipe racks group of the dykes and dams super standard flood described in detailed description of the invention one or two, the spacing of often adjacent two flood diversion pipe shafts 6 of described flood diversion pipe racks group adopts following formulae discovery:

B=d+2L _ktg (β) formula four

In formula: B---be every adjacent two flood diversion pipe shaft 6 axial line distance in flood diversion pipe racks group, m;

D---be Flexible water pipe 8 intracavity diameter of flood diversion pipe shaft 6 or rigid backbone synthetic material, m;

L _k---be the absorption basin protection-apron 9-1 length of one-level geosynthetics, m;

β---be angle of flare.

Detailed description of the invention four: as shown in Fig. 1 and Fig. 4, the flood diversion pipe racks group of the dykes and dams super standard flood described in detailed description of the invention one, the length L of the absorption basin protection-apron 9-1 of described one-level geosynthetics and the absorption basin protection-apron 9-2 of secondary geosynthetics _k, described one-level sandbag baffle wall style 10-1 and secondary sandbag baffle wall style 10-2 height c all adopt following formulae discovery;

$c={\mathrm{\σh}}_c^{\′\′}+\frac{q^2}{2g{\left({\mathrm{\σh}}_c^{\′\′}\right)}^2}-{\left(\frac{q}{m\sqrt{2g}}\right)}^{2/3}$ Formula five

$h_c^{\′\′}=\frac{h_c}{2}(\sqrt{1+8{\mathrm{Fr}}_c^2}-1)$ Formula six

${\mathrm{Fr}}_c=\frac{q}{h_c\sqrt{{\mathrm{gh}}_c}}$ Formula seven

formula eight

L _k=(0.7 ~ 0.8) L _jformula nine

L _j=9.5 (Fr _c-1) h _cformula ten

$q_1=\frac{Q}{nd},$ Formula 11

$q_2=\frac{Q}{nB}$ Formula 12

In formula: c---be one-level sandbag baffle wall style 10-1 height or secondary sandbag baffle wall style 10-2 height, m;

H " _c---be the absorption basin protection-apron 9-1 water depth after jump of one-level geosynthetics or the absorption basin protection-apron 9-2 water depth after jump of secondary geosynthetics, m;

σ---be one-level sandbag baffle wall style 10-1 safety factor or secondary sandbag baffle wall style 10-2 safety factor;

M---be one-level sandbag baffle wall style 10-1 water flow coefficient or secondary sandbag baffle wall style 10-2 water flow coefficient;

Q---be the discharge per unit width of flood diversion point, m ³/ s.m,

Q ₁, q ₂---the Flexible water pipe 8 being respectively the rigid body skeleton synthetic material of flood diversion point exports discharge per unit width, one-level sandbag baffle wall style 10-1 discharge per unit width, m ³/ s.m; Wherein: the L of the absorption basin protection-apron 9-1 of first order calculation geosynthetics _kand the c of one-level sandbag baffle wall style 10-1 adopts q ₁, calculate the L of the absorption basin protection-apron 9-2 of secondary geosynthetics _kand the c of secondary sandbag baffle wall style 10-2 adopts q ₂;

H _c---be the Flexible water pipe 8 exit constriction section depth of water or the one-level sandbag baffle wall style 10-1 necked-down section depth of water of the rigid backbone synthetic material of flood diversion point, m;

Fr _c---be Flexible water pipe 8 exit constriction section Floyd's algorithm or one-level sandbag baffle wall style 10-1 after-contraction section Floyd's algorithm of rigid backbone synthetic material;

E ₀---for downstream flood diversion for the flood diversion pipe shaft 6 of datum or the Flexible water pipe 8 upstream total head of rigid backbone synthetic material, m;

---be one-level sandbag baffle wall style 10-1 or secondary sandbag baffle wall style 10-2 efflux coefficient;

L _k---be the absorption basin protection-apron 9-1 length of one-level geosynthetics or the absorption basin protection-apron 9-2 length of secondary geosynthetics, m;

L _j---be the free hydraulic jump length of absorption basin protection-apron 9-1 of one-level geosynthetics or the free hydraulic jump length of absorption basin protection-apron 9-2 of secondary geosynthetics, m;

Q---be the flood diversion pipe racks group flow of flood diversion point, m ³/ s; ;

B---be every adjacent two flood diversion pipe shaft 6 axial line distance in flood diversion pipe racks group, m.

Detailed description of the invention five: as shown in Fig. 1 and Fig. 4, the flood diversion pipe racks group of the dykes and dams super standard flood described in detailed description of the invention one, described colour bar cloth sandbag erosion control section 11 length adopts lower formulae discovery;

$L_p=K\sqrt{q_3\sqrt{\mathrm{\Δ}H}}+\frac{3.96q_3\sqrt{2{\mathrm{\α}}_0-z/h}}{\sqrt{(\frac{r_s}{r}-1){\mathrm{gd}}_s}{\left(\frac{h}{d_s}\right)}^{1/6}}-6h_t$ Formula 13

$q_3=\frac{Q}{B_{c2}}$ Formula 14

In formula: L _p---be colour bar cloth sandbag erosion control section 11 length, m;

K---be colour bar cloth sandbag erosion control section 11 terminal groups soil stabilization slope coefficient;

Q ₃---be secondary sandbag baffle wall style 10-2 discharge per unit width, m ³/ s.m;

Δ H---be dykes and dams 1 upstream and downstream head difference, m;

α ₀---be the kinetic energy correction factor of the velocity flow profile of secondary sandbag baffle wall style 10-2 end;

Z---be the position height of the velocity flow profile Peak Flow Rate of secondary sandbag baffle wall style 10-2 end, m;

H---be the secondary sandbag baffle wall style 10-2 end depth of water, m;

H _t---be flood diversion place downstream water depth, m;

R _s, r---be respectively colour bar cloth sandbag erosion control section 11 terminal groups soil and the unit weight of water, KN/cm ³;

D _s---be d _s50colour bar cloth sandbag erosion control section 11 terminal groups grogs footpath, cm;

B _c2---be the width of secondary sandbag baffle wall style 10-2, m;

Q---be the flood diversion pipe racks group flow of flood diversion point, m ³/ s.

Application of the present invention: when flood cross predetermined water level enter flood control time, first cage trashrack 4 (for reinforced rail silk screen) is installed, HDPE flap valve 5, water level reaches corresponding warning line, dykes and dams 1 are built small dike 2 and keeps off wave, dash, install the Flexible water pipe 8 (described rigid backbone is that the solids such as reinforced rail silk screen are made the internal diameter skeleton identical with flood diversion pipe shaft 6 internal diameter) of rigid backbone synthetic material, described synthetic material is canvas line with rubber, waterproof cloth, thick plastic sheeting or composite geo-membrane simultaneously).Crops in the absorption basin protection-apron of two-stage geosynthetics, two-stage sandbag baffle wall style and colour bar cloth sandbag erosion control section 11 scope is overwhelmed or rooted out, lay the absorption basin protection-apron of geosynthetics, two-stage sandbag baffle wall style and colour bar cloth sandbag erosion control section 11, dissipation and scouring material top wire gauze (or netting) is covered (or bottom lays colour bar cloth+non-woven fabrics+netting from the bottom to top), the sandbag of one-level sandbag baffle wall style 10-1 is with on wire gauze (or netting) cover, beat timber every 2 ~ 5m firm, secondary sandbag baffle wall style 10-2 is only with sandbag.Pull-up HDPE flap valve 5 rope opening section or all gate flood diversion as required, Attended mode during flood diversion, runs into abnormal conditions and closes the door in time, when water minimizing, drawdown, gatage also reduces, or closed portion gate, carrys out Close All gate when flow reaches safe.

Take off the Flexible water pipe 8 of cage trashrack 4, HDPE flap valve 5, rigid backbone synthetic material after flood season, clear up the absorption basin protection-apron of two-stage geosynthetics, two-stage sandbag baffle wall style and colour bar cloth sandbag erosion control section 11 in time, recover to plough.Import hafnium U-type groove 3 is with plastic sheeting and the shutoff of the sandbag soil body and carry out revetment, prevent overcurrent from destroying dykes and dams 1, if flood diversion pipe shaft 6 adopts Pe, Pvc or Pp chemical industry pipe, the outlet hafnium U-type groove 7 of flood diversion pipe shaft 6 also answers shutoff resisting ultraviolet radiation, prevents flood diversion pipe shaft 6 aging.If dykes and dams 1 plan for flood control with regard to flood diversion, carries out flood diversion according to planning with reference to above step before not building small dike.

The course of work of flood-fighting interim flood diversion pipe shaft 6 and the Flexible water pipe 8 of rigid backbone synthetic material: if the depth of water is less or without HDPE flap valve, wire gauze is adopted to tie up at flood diversion pipe shaft 6 entrance point as cage trashrack 4, keep off native erosion control with sandbag+non-woven fabrics+iron wire and replace import hafnium U-type groove 3, flood diversion pipe shaft 6 stretches out the outlet hafnium U-type groove 7 that downstream levee slope replaces flood diversion pipe shaft 6, if need to stop flood diversion, before cage trashrack 4, put colour bar cloth pressure sandbag replace HDPE flap valve 5, other is the same.

Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited in above-mentioned citing, and the change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement also should belong to protection scope of the present invention.

Claims (5)

1. the flood diversion pipe racks group of a dykes and dams super standard flood, it is characterized in that: described flood diversion pipe racks group comprises several flood diversion pipe racks, several flood diversion pipe racks described include import hafnium U-type groove (3), cage trashrack (4), HDPE flap valve (5), flood diversion pipe shaft (6), outlet hafnium U-type groove (7), the Flexible water pipe (8) of rigid backbone synthetic material, the absorption basin protection-apron of two-stage geosynthetics, two-stage sandbag baffle wall style and colour bar cloth sandbag erosion control section (11);

The absorption basin protection-apron of described two-stage geosynthetics is the absorption basin protection-apron (9-1) of one-level geosynthetics and the absorption basin protection-apron (9-2) of secondary geosynthetics respectively, described two-stage sandbag baffle wall style is one-level sandbag baffle wall style (10-1) and secondary sandbag baffle wall style (10-2) respectively, described cage trashrack (4) is placed in import hafnium U-type groove (3), described HDPE flap valve (5) is placed in cage trashrack (4), HDPE flap valve (5) is fixed on flood diversion pipe shaft (6) entrance point, described flood diversion pipe shaft (6) is horizontally set on dykes and dams (1) top, and flood diversion pipe shaft (6) entrance point is positioned at import hafnium U-type groove (3) and cage trashrack (4), the port of export of flood diversion pipe shaft (6) is provided with outlet hafnium U-type groove (7), the arrival end of the Flexible water pipe (8) of described rigid backbone synthetic material is connected with flood diversion pipe shaft (6) port of export, the port of export of the Flexible water pipe (8) of rigid backbone synthetic material to be placed on described dykes and dams (1) slope, downstream and to be arranged on the absorption basin protection-apron (9-1) of one-level geosynthetics, the absorption basin protection-apron (9-1) of described one-level geosynthetics is laid on beach or field, absorption basin protection-apron (9-1) upstream extremity of one-level geosynthetics is placed on dykes and dams (1) slope, downstream, absorption basin protection-apron (9-1) downstream of one-level geosynthetics is connected with one-level sandbag baffle wall style (10-1), absorption basin protection-apron (9-2) upstream of described secondary geosynthetics is connected with one-level sandbag baffle wall style (10-1), the absorption basin protection-apron (9-2) of secondary geosynthetics is laid on beach or field, absorption basin protection-apron (9-2) downstream of secondary geosynthetics is connected with secondary sandbag baffle wall style (10-2), described colour bar cloth sandbag erosion control section (11) is laid on beach or field, colour bar cloth sandbag erosion control section (11) upstream extremity is connected with secondary sandbag baffle wall style (10-2), described one-level sandbag baffle wall style (10-1) is disposed adjacent with the Flexible water pipe (8) of rigid backbone synthetic material, all flood diversion pipe shafts (6) in described flood diversion pipe racks group are all equidistantly set up in parallel, the Flexible water pipe (8) of all rigid backbone synthetic materials in flood diversion pipe racks group is equidistantly arranged all side by side.

2. the flood diversion pipe racks group of dykes and dams super standard flood according to claim 1, is characterized in that: Flexible water pipe (8) intracavity diameter of described flood diversion pipe shaft (6) and rigid backbone synthetic material all adopts following formulae discovery:

$d=\sqrt{\frac{4Q}{{\mathrm{\π\μ}}_{c}n\sqrt{2{\mathrm{gH}}_0}}}$ Formula one

${\mathrm{\μ}}_c=\frac{1}{\sqrt{1+\mathrm{\λ}\frac{l}{d}+\mathrm{\Σ}\mathrm{\ζ}}}$ Formula two

$H_0=H+\frac{{\mathrm{\αV}}_0^2}{2g}$ Formula three

In formula: d---be Flexible water pipe (8) intracavity diameter of flood diversion pipe shaft (6) or rigid backbone synthetic material, m;

Q---be the flood diversion pipe racks group flow of flood diversion point, m ³/ s;

π---be pi;

μ _c---be Flexible water pipe (8) discharge coefficient of flood diversion pipe shaft (6) or rigid backbone synthetic material;

N---be the flood diversion pipe shaft (6) of flood diversion pipe racks group or Flexible water pipe (8) quantity of rigid backbone synthetic material;

G---be acceleration of gravity, m ²/ s;

H, H ₀---be respectively the acting head not comprising approach velocity head He comprise approach velocity head;

λ---be Flexible water pipe (8) frictional resistant coefficient of flood diversion pipe shaft (6) or rigid backbone synthetic material;

L---be Flexible water pipe (8) the compute segment length of flood diversion pipe shaft (6) or rigid backbone synthetic material, m;

∑ ζ---be total losses coefficient sum in Flexible water pipe (8) compute segment of flood diversion pipe shaft (6) or rigid backbone synthetic material;

α---be kinetic energy correction factor;

V ₀---be approach velocity, m/s.

3. the flood diversion pipe racks group of dykes and dams super standard flood according to claim 1 and 2, is characterized in that: the spacing of often adjacent two flood diversion pipe shafts (6) of described flood diversion pipe racks group adopts following formulae discovery:

B=d+2L _ktg (β) formula four

In formula: B---be every adjacent two flood diversion pipe shaft (6) axial line distance in flood diversion pipe racks group, m;

D---be Flexible water pipe (8) intracavity diameter of flood diversion pipe shaft (6) or rigid backbone synthetic material, m;

L _k---be absorption basin protection-apron (9-1) length of one-level geosynthetics, m;

β---be angle of flare.

4. the flood diversion pipe racks group of dykes and dams super standard flood according to claim 1, is characterized in that: the length L of the absorption basin protection-apron (9-1) of described one-level geosynthetics and the absorption basin protection-apron (9-2) of secondary geosynthetics _k, described one-level sandbag baffle wall style (10-1) and secondary sandbag baffle wall style (10-2) height c all adopt following formulae discovery;

$c={\mathrm{\σh}}_c^{\′\′}+\frac{q^2}{2g{\left({\mathrm{\σh}}_c^{\′\′}\right)}^2}-{\left(\frac{q}{m\sqrt{2g}}\right)}^{2/3}$ Formula five

$h_c^{\′\′}=\frac{h_c}{2}(\sqrt{1+8{\mathrm{Fr}}_c^2}-1)$ Formula six

${\mathrm{Fr}}_c=\frac{q}{h_c\sqrt{{\mathrm{gh}}_c}}$ Formula seven

formula eight

L _k=(0.7 ~ 0.8) L _jformula nine

L _j=9.5 (Fr _c-1) h _cformula ten

$q_1=\frac{Q}{nd},$ Formula 11

$q_2=\frac{Q}{nB}$ Formula 12

In formula: c---for one-level sandbag baffle wall style (10-1) height or secondary sandbag baffle wall style (10-2) highly, m;

H " _c---be absorption basin protection-apron (9-1) water depth after jump of one-level geosynthetics or absorption basin protection-apron (9-2) water depth after jump of secondary geosynthetics, m;

σ---be one-level sandbag baffle wall style (10-1) safety factor or secondary sandbag baffle wall style (10-2) safety factor;

M---be one-level sandbag baffle wall style (10-1) water flow coefficient or secondary sandbag baffle wall style (10-2) water flow coefficient;

Q---be the discharge per unit width of flood diversion point, m ³/ s.m,

Q ₁, q ₂---be respectively Flexible water pipe (8) outlet discharge per unit width, one-level sandbag baffle wall style (10-1) discharge per unit width of the rigid body skeleton synthetic material of flood diversion point, m ³/ s.m; Wherein: the L of the absorption basin protection-apron (9-1) of first order calculation geosynthetics _kand the c of one-level sandbag baffle wall style (10-1) adopts q ₁, calculate the L of the absorption basin protection-apron (9-2) of secondary geosynthetics _kand the c of secondary sandbag baffle wall style (10-2) adopts q ₂;

H _c---be Flexible water pipe (8) the exit constriction section depth of water or one-level sandbag baffle wall style (10-1) the necked-down section depth of water of the rigid backbone synthetic material of flood diversion point, m;

Fr _c---be Flexible water pipe (8) exit constriction section Floyd's algorithm or one-level sandbag baffle wall style (10-1) the after-contraction section Floyd's algorithm of rigid backbone synthetic material;

E ₀---for downstream flood diversion for the flood diversion pipe shaft (6) of datum or Flexible water pipe (8) the upstream total head of rigid backbone synthetic material, m;

---be one-level sandbag baffle wall style (10-1) or secondary sandbag baffle wall style (10-2) efflux coefficient;

L _k---be absorption basin protection-apron (9-1) length of one-level geosynthetics or absorption basin protection-apron (9-2) length of secondary geosynthetics, m;

L _j---be absorption basin protection-apron (9-1) the free hydraulic jump length of one-level geosynthetics or absorption basin protection-apron (9-2) the free hydraulic jump length of secondary geosynthetics, m;

Q---be the flood diversion pipe racks group flow of flood diversion point, m ³/ s; ;

B---be every adjacent two flood diversion pipe shaft (6) axial line distance in flood diversion pipe racks group, m.

5. the flood diversion pipe racks group of dykes and dams super standard flood according to claim 1, is characterized in that: described colour bar cloth sandbag erosion control section (11) length adopts lower formulae discovery;

$L_p=K\sqrt{q_3\sqrt{\mathrm{\Δ}H}}+\frac{3.96q_3\sqrt{2{\mathrm{\α}}_0-z/h}}{\sqrt{\left(\frac{r_s}{r}-1\right){\mathrm{gd}}_s}{\left(\frac{h}{d_s}\right)}^{1/6}}-6h_t$ Formula 13

$q_3=\frac{Q}{B_{c2}}$ Formula 14

In formula: L _p---be colour bar cloth sandbag erosion control section (11) length, m;

K---be colour bar cloth sandbag erosion control section (11) terminal groups soil stabilization slope coefficient;

Q ₃---be secondary sandbag baffle wall style (10-2) discharge per unit width, m ³/ s.m;

Δ H---be dykes and dams (1) upstream and downstream head difference, m;

α ₀---be the kinetic energy correction factor of the velocity flow profile of secondary sandbag baffle wall style (10-2) end;

Z---be the position height of the velocity flow profile Peak Flow Rate of secondary sandbag baffle wall style (10-2) end, m;

H---be secondary sandbag baffle wall style (10-2) the end depth of water, m;

H _t---be flood diversion place downstream water depth, m;

R _s, r---be respectively colour bar cloth sandbag erosion control section (11) terminal groups soil and the unit weight of water, KN/cm ³;

D _s---be d _s50colour bar cloth sandbag erosion control section (11) terminal groups grogs footpath, cm;

B _c2---be the width of secondary sandbag baffle wall style (10-2), m;

Q---be the flood diversion pipe racks group flow of flood diversion point, m ³/ s.