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Drain buy everybody knows shopping around is not a bad reason, is one kind of product can't tell good from bad, products which can stand comparison is able to attract eyeball. As even reasonable production factory, we depend on consumers to share, how to carry out quality inspection and selection drainage plate.

Appearance is to determine the initial impacts of the products, plastic drainage plate appearance quality inspection:

(1) the outer packing should be strong plastic drainage plate, and shall ensure that no damage in transit, not board core. Piled up for a considerable time drainage plate, packaging materials should have ability to uv radiation.

(2) the plastic drainage plate shape size should be uniform, the width of the allowable deviation of plus or minus 2 mm, the thickness of the allowable deviation of 0.5 mm.

(3) the plastic drain board core, surface smooth, no empty without connectors and air bubbles, the homogeneous and no tooth division phenomenon of lodging, otherwise will reduce the drain of water area and water volume.

Drain performance indexes including the longitudinal flow capacity, complex tensile strength and elongation, membrane tensile strength and elongation, coefficient of permeability of membrane, membrane filter equivalent aperture, etc. Play set in the dry state, when the plastic drainage plate under longitudinal strain, and plastic drainage plate in the soil moisture conditions work, for lateral force. When a membrane transverse strength is insufficient, in a plate in the earth pressure under the action of clingy and core groove teeth, reduce, displacement, water area, so the membrane dry tensile strength with the longitudinal tensile strength as the index, wet tensile strength and transverse tensile strength as the control indicators. Each volume membrane joint drainage board, not more than one lap joint length is greater than 20 cm. Membrane plastic drainage plate and core plate coating should be tight, no bubbles, no cock, loose wait for a phenomenon.

Drain's construction quality control (1) the subgrade water out 50 m wide scope, and will place silt, roots, grass, humus soil all invisible. (2) within the scope of the roadbed filling 6% lime soil according to design requirements, the formation of a two-way road arch, 2 ~ 3 times with light roller static pressure, compaction, and the road line outside the excavation vertical drains and used for sealing groove fixed sealing membrane. (3) according to the department of surveying and mapping to provide wire point, gives off road in the axis of the pile and construction scope, then adopt the method of quantity of steel rule is apart from the set in the center of each pile location, and make clear the tag, the pile location deviation is less than 15 cm. (4) a set of plastic drainage plate. A. driving machine plastic drainage plate assembly is completed, the use of strict inspection of mechanical performance and stability, to ensure that meet the construction requirements. B. driving machine tube boots with the pile location markers when positioning the deviation should be controlled within + / - 70 mm, inserted at the bottom of the machine should be flat, drill rod should be vertical, steel casing shall not be bent, in order to ensure the verticality of plastic drainage can.