Water stop structure for pipeline penetrating film
Technical field
A kind of simple and practical water-stop technology when the present invention relates to various pipes and passing waterproofing geomembrane.
Background technique
As the antiseepage base material, with the non-woven fabric compounded geotechnological impervious material that forms, its barrier performance depends primarily on the barrier performance of plastic pellicle to geomembrane with plastic pellicle.At present, the plastic pellicle that antiseepage is both at home and abroad used mainly contains PVC (PVC) and polyethylene (PE), and they are a kind of polymer chemistry flexible materials, and proportion is less, and extensibility is stronger, adapts to the deformability height.Corrosion-resistant, low temperature resistant, good frost resistance.Its dominant mechanism is to cut off the earth dam leak paths with the impermeability of plastic pellicle, bears hydraulic pressure and adapts to dam deformation with its bigger tensile strength and specific elongation; And nonwovens also is a kind of polymeric staple fiber dimension chemical material; by acupuncture or hot sticky shaping; have advantages of higher tensile strength and extensibility; it is with after plastic pellicle combines; the tensile strength and the anti-puncture ability of plastic pellicle have not only been increased; and, increased the friction factor of surface of contact because nonwoven surface is coarse, help the stable of composite geo-membrane and protective layer.Simultaneously, they have erosion resisting preferably to bacterium and chemical action, the erosion of have good effect in acid, alkali, salt.
But present geomembrane is when running into pipeline and pass, and geomembrane is met pipe and need be blocked, and seepage control system goes to pot, thereby influences whole anti-seepage effect.
Summary of the invention
In order to solve geomembrane when running into pipeline and pass, the problem of its antiseepage ability drop the invention provides a kind of brand-new water stop structure for pipeline penetrating film.
Technological scheme of the present invention is: the position of pipeline penetrating film is provided with a base, is provided with an appearance in the base and wears the rigid waterproofing sleeve pipe that the film pipeline is placed in one, and geomembrane embeds in the base.
Wherein, base can be a concrete structure, and in casting process the geomembrane end is wrapped into wherein, reaches the purpose of antiseepage.
The geomembrane end places the length of base preferably to be not less than 800mm.Preferably be not less than 200mm and reserve concrete thickness between geomembrane and rigid waterproofing sleeve outer wall.
Water stop structure for pipeline penetrating film provided by the invention can be widely used in Tu Chibianpo, flood bank side slope, shore protection etc., can improve geomembrane greatly and meet the barrier performance of pipeline when passing.
Description of drawings
Fig. 1 is the sectional view of the structure of the embodiment of the invention;
Fig. 2 is the front view of the structure of the embodiment of the invention.
Embodiment
As illustrated in fig. 1 and 2, comprise a base 3 in the water stop structure for pipeline penetrating film provided by the invention, be provided with an appearance in the base 3 and wear the rigid waterproofing sleeve pipe 4 that film pipeline 2 is placed in one that geomembrane 1 embeds in the base 3.There is geomembrane protective layer 5 both sides of the geomembrane outside the base 3.In the present embodiment, geomembrane insertion concrete length L is 900mm; Reserving concrete thickness t between geomembrane 1 and rigid waterproofing sleeve pipe 4 outer walls is 250mm.