CN102828489A - System for arranging piles to fix riverbed main stream - Google Patents

Abstract

The invention discloses a system for arranging piles to fix a riverbed main stream, which can dredge flood, prevent rivers from swinging, enable channel main stream not to scour both sides of the river channel, prevent scouring and caving the river bank, and relive or even relieve flood prevention pressure to the both sides of the river channel. A row of upstream fixing piles is arranged on the upstream of the direction reach needing governance, and a row of downstream fixing piles is arranged on the downstream of the river reach; and a determined quantity of turbulence piles are arranged on the river channel according to determined row distance and line distance.

Description

The system of riverbed main flow is decided in the pendulum stake

Technical field

The invention belongs to the technical field of river regulation and flood protection works, relate to particularly and a kind ofly put stake and decide the system of riverbed main flow.

Background technology

In the more section of the middle and lower reaches silt in river, general cross-section face width is shallow, and current are at random, and major trough amplitude of fluctuation and swing speed are all very big; The river gesture changes violent, causes going around of riverbed, when being in strong alluvial state; The riverbed can constantly be raised, and aggravation is washed away the riverbank, and embankment can destroy by rush of water when serious; Cause big flood, and cause the waterlogging and the salination in area along the river, bring on a disaster for the littoral common people or the tremendous economic loss.

In the practice process of flood control and disaster reduction; The engineering measure that present stage dredges flood mainly relies on the thought of " returning "; Promptly build flood wall in the two sides, riverbed, the stability on the height of raising two sides, riverbed, shock strength and basis etc. are returned flood in the Shu Zaiyuan river course.But in the river, the shifting bed in downstream, the main flow of flood often changes to the position of washing away on riverbank, this has just caused very big difficulty to flood control.

When current are run into the pile of pendulum in the korneforos; Will produce reflexion and scour flow, reflexion and scour flow will produce disturbance to the bed material of pile foundation certain limit, and the flow velocity in the certain limit is higher than other parts around the stake because the existence of stake makes; Therefore can the bed material of disturbance be sent to downstream; And around stake, forming a low-lying scour hole, the scour hole that array pitch layout pile formed between utilization was certain links together and can form a low-lying main stem, reaches the purpose of guiding main flow and river training.

According to as above principle; For a change the river is in the going around property in middle and lower reaches alluvial plain district; Propose the pendulum stake and decide the riverbed mainstream technology; Make channel thread confirm certain position artificially, do not repulse or subdue the enemy the two sides, river course, and then prevent washing away, preventing collapse on the bank, alleviate even eliminate the pressure of flood of two sides, river course the riverbank at main stem.

Summary of the invention

Technology of the present invention is dealt with problems and is: overcome the deficiency of prior art, provide a kind of and dredge flood, prevent river swing, make channel thread not repulse or subdue the enemy the two sides, river course and then prevent the system of riverbed main flow is decided in the pendulum stake of the pressure of flood of washing away, prevent collapse on the bank, alleviate even eliminate the two sides, river course on riverbank.

Technical solution of the present invention is: the system of riverbed main flow is decided in this pendulum stake, and delegation's upper reaches spud pile is set at the upper reaches of section, and delegation's downstream spud pile is set in the downstream of section, the flow-disturbing stake of arranging specified quantity according to nominated bank's distance and row distance at the place, riverbed.

Because delegation's upper reaches spud pile is set at the upper reaches of section; Delegation's downstream spud pile is set in the downstream of section, and according to nominated bank's distance and the flow-disturbing stake of row apart from the layout specified quantity, the flow-disturbing stake strengthens the peripheral water flow velocity of stake at the place, riverbed; Wash away local riverbed, make the riverbed incision.When current are run into the flow-disturbing stake of pendulum in the riverbed; Will produce reflexion and scour flow; The interior flow velocity of certain limit is higher than other parts around making the flow-disturbing stake; Therefore can the bed material of disturbance be sent to downstream; And form a low-lying scour hole around the flow-disturbing stake, utilize certain between array pitch arrange that continuous scour hole that the flow-disturbing stake forms can make the riverbed at the position of having arranged the flow-disturbing stake reduce and becomes main stem, reach and dredge flood, prevent the river swing, make channel thread not repulse or subdue the enemy the two sides, river course and then prevent washing away, preventing collapse on the bank, alleviate even eliminate the purpose of the pressure of flood of two sides, river course the riverbank.

Description of drawings

Fig. 1 shows the vertical view that the system of riverbed main flow is decided in pendulum stake according to the present invention;

Fig. 2 shows the front view that the system of riverbed main flow is decided in pendulum stake according to the present invention.

The specific embodiment

Shown in Fig. 1-2; The system of riverbed main flow is decided in this pendulum stake, and delegation's upper reaches spud pile is set at the upper reaches of section, and delegation's downstream spud pile is set in the downstream in river; 6 places are according to nominated bank's distance and the flow-disturbing stake of row apart from the layout specified quantity in the riverbed; The flow-disturbing stake strengthens the peripheral water flow velocity of stake, washes away local riverbed, makes the riverbed incision and forms the following passage of letting out of riverbed main flow.

Because delegation's upper reaches spud pile is set at the upper reaches of section; Delegation's downstream spud pile is set in the downstream of section; The flow-disturbing stake of arranging specified quantity according to nominated bank's distance and row distance at the place, riverbed; Thereby the flow-disturbing stake makes the riverbed incision form the following passage of letting out of riverbed main flow; When current are run into the flow-disturbing stake of pendulum in the riverbed, will produce reflexion and scour flow, make that the flow velocity in the certain limit is higher than other parts around the flow-disturbing stake; Therefore can the bed material of disturbance be sent to downstream; And form a low-lying scour hole around the flow-disturbing stake, utilize certain between array pitch arrange that continuous scour hole that the flow-disturbing stake forms can make the riverbed at the position of having arranged the flow-disturbing stake reduce and becomes main stem, reach and dredge flood, prevent the river swing, make channel thread not repulse or subdue the enemy the two sides, river course and then prevent washing away, preventing collapse on the bank, alleviate even eliminate the purpose of the pressure of flood of two sides, river course the riverbank.

Preferably, this system also comprises a plurality of internal fixation stakes 4 that are located at the place, riverbed.Upstream and downstream spud pile and internal fixation stake adopt buried depth to fix, and usefulness should adopt lanyard between stake and the stake, also can buried depth add lanyard or buried depth is fixed.The buried depth fibrous root of stake, also can rule of thumb be confirmed through calculating or test is confirmed according to the amount of water to be discharged in river, bed material size size etc.The implantation mode of described stake is good with modes such as prefabricated back use piling, also can be cast in situs.

Preferably, nominated bank's distance, specify columns distance are respectively according to S ₁=4:8D, S ₂=5:10D calculates,

S wherein ₁Be line-spacing, S ₂Be the row distance, D is the projection width of stake at upstream face.Further, nominated bank is apart from being 3-15 rice, and the specify columns distance is a 2-10 rice.The array pitch fibrous root, also can rule of thumb be confirmed through calculating or test is confirmed according to the concrete form in the diameter (area of cross section) of stake, former river, amount of water to be discharged, flow velocity, bed material size size etc. between concrete layout scope, stake.

Preferably, the quantity of stake is confirmed according to the concrete form in river, letdown flow etc.The diameter (basal area) of said stake needs the form, amount of water to be discharged according to the river etc. through calculating or test is confirmed, also can rule of thumb confirm.Stake is the diameter D of stake in the projection width of upstream face; Confirm according to

; Wherein B is for needing the logical main flow width in whole river

The total line number and the columns of stake are:

$N_1=\frac{L}{S_1},$ ${\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="HDA00001929124100012.png"\; state="\{\{state\}\}">N</figure-callout>}}_2=\frac{\mathrm{<figure-callout\; id="2"\; label="B\; S"\; filenames="HDA00001929124100012.png"\; state="\{\{state\}\}">B</figure-callout>}}{S_{}}$

N wherein ₁Be line number, N ₂Be columns, L is for needing the section length of arrangement.

Preferably, said stake (upper reaches spud pile, internal fixation stake, downstream spud pile, flow-disturbing stake) is plastics stake, bamboo stake, timber, concrete pile, iron stake or matrix modification stake etc.

Preferably, said stake (upper reaches spud pile, internal fixation stake, downstream spud pile, flow-disturbing stake) is hollow pile or solid pile.

Preferably, the cross section of said stake (upper reaches spud pile, internal fixation stake, downstream spud pile, flow-disturbing stake) is circle, square, rectangle or polygon.

Preferably, as shown in Figure 2, this system also is provided with the vertically fixing suspension cable 5 that connects upper reaches spud pile 1, internal fixation stake 4, downstream spud pile 2, flow-disturbing stake 3 through the flow-disturbing stake fixedly suspension cable be fixed to vertical fixedly suspension cable.

Preferably, vertically fixedly arranging the crosswise fixed suspension cable between the suspension cable 5.

Preferably, said suspension cable is antiseptic and rustproof cable wire.

Preferably, the cross section of said suspension cable determines through calculating according to the intensity of bed knife and cord material.The area of the cross section of said suspension cable is according to computes,

$F=N\frac{\mathrm{\&rho;}{v}^2\mathrm{hD}}{f}$

Wherein F is the sectional area of suspension cable; ρ is the unit weight of water; V is the flow velocity of water; H is a maximum water depth; D is the diameter of stake or in upstream face projection width, and N is that suspension cable connected a stake is with number; F is the suspension cable strength of materials.

Concrete job practices is: in the river course scope that natural river course is artificially confirmed; Utilize upper reaches spud pile 1 and downstream spud pile 2 and internal fixation stake 4 in the river course of needs dredging upper and lower fixing vertical suspension cable 5; According to the diameter of the flow-disturbing stake 3 of field by using, confirm flow-disturbing stake 3 array pitch and the spacing vertical and river course of road upstream and downstream along the river, after 3 of flow-disturbing stakes, array pitch are definite; Utilize the flow-disturbing stake fixedly suspension cable the flow-disturbing stake is fixed in vertically fixedly on the suspension cable 5; For guaranteeing vertically the fixedly spacing of suspension cable 5, vertically fixedly arranging the crosswise fixed suspension cable between suspension cable, the stake layout is accomplished descendant worker channel thread is caused pendulum stake district, river course.

The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs to the protection domain of technical scheme of the present invention to any simple modification, equivalent variations and modification that above embodiment did.

Claims (10)

1. the system of riverbed main flow is decided in the pendulum stake; It is characterized in that: delegation's upper reaches spud pile (1) is set at the upper reaches of section; Delegation's downstream spud pile (2) is set, the flow-disturbing stake (3) of arranging specified quantity according to nominated bank's distance and row distance at the place, riverbed in the downstream of section.

2. the system of riverbed main flow is decided in pendulum stake according to claim 1, it is characterized in that: also comprise a plurality of internal fixation stakes (4) that are located at the place, riverbed.

3. the system of riverbed main flow is decided in pendulum stake according to claim 1, it is characterized in that: nominated bank's distance, specify columns distance are respectively according to S ₁=4:8D, S ₂=5:10D calculates,

S wherein ₁Be line-spacing, S ₂Be the row distance, D is the projection width of stake at upstream face.

4. the system of riverbed main flow is decided in pendulum stake according to claim 1; It is characterized in that: stake is the diameter D of stake in the projection width of upstream face; Confirm according to

; Wherein B is for needing the logical main flow width in whole river

The total line number and the columns of stake are:

$N_1=\frac{L}{S_1},$ $N_2=\frac{B}{S_2}$

N wherein ₁Be line number, N ₂Be columns, L is for needing the section length of arrangement.

5. the system of riverbed main flow is decided in each described pendulum stake according to claim 1-4, and it is characterized in that: said stake is plastics stake, bamboo stake, timber, concrete pile, iron stake or matrix modification stake.

6. the system of riverbed main flow is decided in each described pendulum stake according to claim 1-4, and it is characterized in that: said stake is hollow pile or solid pile.

7. the system of riverbed main flow is decided in each described pendulum stake according to claim 1-4, and it is characterized in that: the cross section of said stake is circle, square, rectangle or polygon.

8. the system of riverbed main flow is decided in pendulum stake according to claim 2; It is characterized in that: also be provided with the vertically fixing suspension cable (5) that connects upper reaches spud piles (1), internal fixation stake (4), downstream spud pile (2), flow-disturbing stake (3) through the flow-disturbing stake fixedly suspension cable be fixed to vertical fixedly suspension cable.

9. the system of riverbed main flow is decided in pendulum stake according to claim 8, it is characterized in that: vertically fixedly arranging the crosswise fixed suspension cable between the suspension cable (5).

According to Claim 8 or the stake of 9 described pendulum decide the system of riverbed main flow, it is characterized in that: the area of the cross section of said suspension cable is according to computes,

$F=N\frac{\mathrm{\&rho;}{v}^2\mathrm{hD}}{f}$

Wherein F is the sectional area of suspension cable; ρ is the unit weight of water; V is the flow velocity of water; H is a maximum water depth; D is the diameter of stake or in upstream face projection width, and N is that suspension cable connected a stake is with number; F is the suspension cable strength of materials.

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