Page 131 - Water Standards
P. 131
concrete. When the foundation is a clay toothed groove,
geomembranes shall be folded zigzag like “ ”, and shall
be tamped manually layer by layer.
3) For the connection between geomembranes and the bank
slope, geomembranes can be embedded in concrete key⁃
walls or by inserted into the impervious rock foundation in
case of no design requirements.
5 Protection layer: when geomembranes are used for anti⁃
seepage on sloping walls, a protective layer shall be laid on the fin⁃
ished geomembranes.
1) The soil protection layer shall be laid from bottom to top.
The thickness and density of the layer shall be constructed
according to design requirements.
2) If the protective layer consists of hard material, such as
concrete, flagstone and dimension stone, the foundation
shall be treated carefully to control the deformation, and
prevent the geomembranes from sliding and causing tearing
cracks. Furthermore, the peripheral laying and pressure
on the top part shall be coordinated during construction to
ensure the completeness of the laying work. If the
protective layer is made by shoting concrete, consistent
concrete thickness shall be ensured.
6 The construction quality inspection shall comply with the fol⁃
lowing requirements:
1) Set up quality inspection regulations. Raw materials, ma⁃
terials tests, preparation and use of binder, joints,
planeness of laid surface, and peripheral connections shall
be inspected regularly and controlled by specially assigned
workers.
2) Appearance inspection shall be done each time the soil fill⁃
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