CN202194111U

CN202194111U - Water drainage system in river network area waterway revetment

Info

Publication number: CN202194111U
Application number: CN2011201893443U
Authority: CN
Inventors: 卜俊松
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-05
Filing date: 2011-06-05
Publication date: 2012-04-18
Anticipated expiration: 2021-06-05

Abstract

The utility model discloses a water drainage system in river network area waterway revetment, which comprises a water drainage pipe, a blind ditch and an inspection shaft. The blind ditch comprises a filter pipe and a gravel reverse filtering layer. Geotextile is wrapped out of the gravel reverse filtering layer, the inspection shaft is communicated with the blind ditch, an opening on the upper portion of the inspection shaft is provided with a cover plate, and two side ends of the water drainage pipe are communicated with the inside of the inspection shaft. The water drainage system in the river network area waterway revetment can obviously improve utilization functions of a river network area waterway revetment project, prolong operation service life of the project and reduce maintenance cost of the waterway and is particularly suitable for plain area soft soil waterway revetment.

Description

Drainage system in the shore protection of navigation channel, area, the network of waterways

Technical field

The utility model relates to a kind of drainage system, specifically a kind of drainage system that is applied in the shore protection of navigation channel, area, the network of waterways.

Background technology

In order to alleviate the adverse effect of groundwater pressure, need take engineering measure to reduce groundwater table behind the wall to bank protection structure.Common way is that the PVC hard plastic tube of laying Φ 50mm～Φ 100mm at a certain height and position of wall body structure along the line is as gutter 1 at present; The pipe end position elongated layout rubble loaded filter of gutter 1 or geotextiles are wrapped up rubble 2 behind wall again, like Fig. 1, Fig. 2 and shown in Figure 3.Yet this way but is more harm than good for the cruiseway shore protection in area, the network of waterways.In recent years, emptyly cause that the phenomenon that shore protection caves in occurs repeatedly owing to the inducement of gutter causes behind the cruiseway revetment backfill to be washed in a pan, its reason mainly contained three: one, the ship wave effect.With the Hang-jia-hu is example, and along with the volume of inland river waterborne vessel and continuing to increase of carrying capacity, single maximum carrying capacity of inland waters has reached more than 800 tonnes at present; Draft reaches more than 3.2 meters; Its ship wave was second to Qian Jiangchao hardly to the instant impact of two sides when boats and ships normally navigated by water, and its billowing wave makes the rapid drawdown before this of bank water level, rises sharply again; Be to collide repeatedly then, slowly decorporate at last.When water level rises sharply, after current pour in gutter in the shore protection fast and clash into wall back and forth.And when drawdown, because suction function, what from gutter, reflux out nearly all is muddy water.So move in circles, earth is turned to slime water take out of, cause behind the wall or the following cubic metre of earth of naughty sky in slope, the hole is increasing, causes bank protection unsettled, wall body unstability, and this is the main cause that causes shore protection to cave in.The 2nd, construction quality problem.On the one hand because loaded filter is laid on the backfill mostly, though press through ramming during construction, its compactness is eventually not as undisturbed soil, backfill misplaces with gutter after sinking to causing the loaded filter slump for this.The opposing party's face wall body or bank protection and backfill and loaded filter be crossed construction simultaneously, and loaded filter is usually as the appendage of wall body, not as other independently element project carry out quality inspection, thereby quality control is not tight.In addition, loaded filter often is close to the wall back of the body, because the sedimentation coefficient between main building thing and the backfill differs greatly, is difficult for really and want compacting to put in place by the backfill on wall limit, forms easily at " dead angle ".And the geotextiles parcel sternly can not make loaded filter defeated and dispersed.Because the shore protection gutter is scarcely long, the longest only 1 meter more, ship wave does not have complete energy dissipating in gutter, bigger to the active force of loaded filter.And the long term of this impact force just is unable to undergo in the not tight location of geotextiles parcel, in case break through breach, the rubble generation displacement of will rolling destroys whole loaded filter then.And in a single day loaded filter is scattered, and current promptly directly impact soil layer, and it is also just inevitable to wash in a pan sky behind the wall.The 3rd, the soil property reason: area, the network of waterways is main with weak soil, and the cruiseway two sides are many to be main with clay, mud matter silty clay, silty clay, and its grain composition is main with clay and powder all, particle diameter less than the content of 0.005mm up to more than 50%.And liquid limit of soil, plastic limit are big, and angle of internal friction is little, and is soluble in water.And 400g/m ²The aperture of non-woven geotextile is 0.07～0.20mm, and therefore under hydraulic action, the part soil particle passes loaded filter easily and taken away by current.Therefore, when the location that soil property is poor more, soil particle is more little, angle of internal friction is more little, often be exactly at first ruined location.

Summary of the invention

The utility model technical problem to be solved is to propose a kind ofly can reduce the cruiseway shore protection phenomenon of caving in, and improves the engineering function of use, prolongs the engineering operation life-span, reduces the drainage system in navigation channel, area, the network of waterways shore protection of channel maintenance cost.

For solving the problems of the technologies described above; Drainage system in the shore protection of navigation channel, area, the utility model network of waterways comprises gutter, french drain and inspection shaft; Said french drain comprises chimney filter and rubble loaded filter, said rubble loaded filter outsourcing geotextiles, and said inspection shaft is communicated with said french drain; The upper opening of said inspection shaft is provided with cover plate, the medial extremity of said gutter and the internal communication of said inspection shaft.

Drainage system in the shore protection of navigation channel, area, the above-mentioned network of waterways, the bottom of said gutter is provided with concrete cushion.

The utility model is owing to adopted above-mentioned technical pattern; After constructing it in the shore protection of navigation channel, area, the network of waterways; The water that pours in down a chimney that ship wave causes has at first consumed part energy in longer gutter; Through inspection shaft energy dissipating once more, can guarantee that the french drain loaded filter is not hit then, avoid washing in a pan behind the wall an empty difficult problem.It only needs to increase a small amount of investment, just can realize the enhancing on the function, and accommodation is wider, no matter is vertical type shore protection or inclined bank protection, section or light section all can adopt greatly.The size of french drain, the size of chimney filter can be carried out corresponding selection according to the groundwater table situation.The utility model drainage system can be used as an independently hidden element project and carries out the quality examination examination, has guaranteed construction quality.Thereby the utility model drainage system prolongs the service life of engineering for the function of use that improves navigation channel, area, network of waterways bank protection work, and the maintenance cost that reduces the navigation channel has a significant effect, and is particularly useful for weak soil matter navigation channel, plains region shore protection.

Description of drawings

Fig. 1, Fig. 2 and Fig. 3 are the structural representations that has three kinds of common in the shore protection of navigation channel drainage systems now;

Fig. 4 is the structural representation of navigation channel, area, the utility model network of waterways shore protection drainage system.

The specific embodiment

As shown in Figure 4, the drainage system in the shore protection of navigation channel, area, the utility model network of waterways comprises gutter 1, french drain 2, inspection shaft 3, chimney filter 4 and rubble loaded filter 5.French drain 2 is laid on the undisturbed soil with shore protection abreast, adopts ditching machine to cooperate the hand excavation.The distance of french drain 2 behind revetment can be 3～5m; Bottom width 30～50cm (look groundwater condition and decide); End elevation is about

; The bottom surface must be smooth, and longitudinal gradient is 1/200～1/300.Be encased inside geotextiles after channel excavation is qualified by inspection, in french drain 2, lay the PE chimney filter 4 (the infiltrating irrigation engineering is with pipe) of Φ 75～Φ 100 then, lay the thick rubble loaded filter 5 of 30～40cm more in the above, wrap geotextiles at last, backfilling of earthwork.Inspection shaft 3 is located in the french drain 2 at interval (can whenever lay 1 at a distance from 30～50m according to actual landform and groundwater condition), and the upper opening of inspection shaft 3 is provided with steel concrete cover plate 7.The medial extremity of gutter 1 be located on the inspection shaft wall 6 and with inspection shaft 3 internal communication, central drainage.Inspection shaft 3 is the hinges that connect french drain 2 and gutter 1, and it has catchments, crosses water, energy dissipating and the multi-functional of desilting regularly.The internal diameter of inspection shaft 3 should be slightly larger than the width of french drain 2, and the end elevation of inspection shaft 3 can flush with shore protection base plate face.The base plate of inspection shaft 3 adopts cast-in-situ concrete, and the material structure of the borehole wall 6 can be brick cement sand plaster, cast-in-situ concrete or precast concrete pipe etc.If earthing backfill on the cover plate of manhole 7 should be set up the bulletin sign.Gutter 1 adopts the precast concrete pipe of Φ 150～Φ 230, is 1: 10～bury at 1: 15.The water side should be placed on the shore protection base plate face, at the bottom of the water inlet end apart from inspection shaft base plate face 30～50cm.Concrete cushion 8 is established in the bottom of gutter 1, and joint is tight with the pea gravel concreten parcel.Gutter 1 must be after special acceptance(check), can the earthing backfill.

Claims

1. the drainage system in the shore protection of navigation channel, area, the network of waterways comprises gutter, it is characterized in that; It also comprises french drain and inspection shaft; Said french drain comprises chimney filter and rubble loaded filter, said rubble loaded filter outsourcing geotextiles, and said inspection shaft is communicated with said french drain; The upper opening of said inspection shaft is provided with cover plate, the medial extremity of said gutter and the internal communication of said inspection shaft.

2. the drainage system in the shore protection of navigation channel, area, the network of waterways as claimed in claim 1 is characterized in that the bottom of said gutter is provided with concrete cushion.