Method And System For Anchoring A Waterproofing Liner To Concrete Curbs Of A Hydraulic Structure

Abstract

A method and a system for anchoring a waterproofing liner of thermoplastic material to a longitudinally extending wall of a hydraulic structure of compacted loose material. The waterproofing liner is seamed to a plurality of continuous anchor bands of thermoplastic material, laterally spaced apart from one another, vertically extending in a traverse direction of the wall, from an upper to a lower position of the hydraulic structure; each continuous anchor band consists of a plurality of axially aligned and partially superimposed modular strips, seamed together and fixed to concrete curbs, defining a surface for laying down the waterproofing liner, in which the curbs longitudinally and/or transversely extend to the wall of the hydraulic structure.

1 . A method for anchoring a waterproofing liner to a side wall which extends in a longitudinal direction of a hydraulic structure comprising compacted layers of loose material, according to which the waterproofing liner comprises flexible sheets of synthetic material fastened to the side wall, the method further comprising the steps of:
 defining a laying surface of the side wall for laying down the waterproofing liner, providing the laying surface with a plurality of continuous seaming bands for the waterproofing liner, in synthetic material;   fastening the waterproofing liner to the side wall of hydraulic structure by seaming the waterproofing liner to the continuous seaming bands;   characterised by the steps of:   configuring the side wall of the hydraulic structure with a plurality of concrete curbs providing said laying surface for the waterproofing liner;   anchoring the plurality of continuous seaming bands to the concrete curbs by arranging the continuous seaming bands in a traverse direction from an upper to a lower position of the side wall;   laying down the waterproofing liner on the laying surface of the concrete curbs; and   anchoring the waterproofing liner to the concrete curbs by seaming the waterproofing liner to the continuous seaming bands.   
     
     
         2 . The method for anchoring the waterproofing liner according to  claim 1 , characterised in that each seaming band consists of a plurality of modular anchor strips axially aligned, seamed together and fastened to the concrete curbs. 
     
     
         3 . The method for anchoring the waterproofing liner according to  claim 1 , characterised by the steps of:
 extruding or casting a plurality of concrete curbs in a longitudinal direction to the wall of the hydraulic structure;   providing a plurality of continuous seaming bands for the waterproofing liner, transversely extending to the concrete curbs, wherein each continuous seaming band comprises a plurality of axially aligned modular anchor strips, each anchor strip comprising a fore seaming part and a rear anchor part for anchor to a concrete curb;   progressively forming each continuous seaming band by fastening the rear anchor part of each anchor band to a first concrete curb; and   partially superimposing and seaming the fore seaming part of each anchor strip to the fore seaming part of a contiguous anchor strip previously fastened to a second concrete curb contiguous with the previous one.   
     
     
         4 . The method for anchoring a waterproofing liner to a wall of a hydraulic structure, according to  claim 3 , characterised by the steps of:
 superimposing each anchor band strip transversely to an extruded curb, and folding the rear anchor part of the anchor strip against the extruded curb; and   locking the folded rear anchor part of each anchor strip against the previously extruded curb, by a compacted layer of loose material and by a subsequently extruded contiguous concrete curb.   
     
     
         5 . The method for anchoring a waterproofing liner to a wall of a hydraulic structure according to  claim 4 , characterised in that each anchor strip is provisionally fastened to an extruded curb before the extrusion of a next concrete curb. 
     
     
         6 . The method for anchoring a waterproofing liner to a wall of a hydraulic structure according to  claim 3 , characterised by configuring the concrete curbs with opposite shoulder elements. 
     
     
         7 . The method for anchoring a waterproofing liner to a wall of a hydraulic structure that extends in a longitudinal direction, according to  claim 1 , characterised by:
 configuring each concrete curb with a plurality of concrete modular blocks, axially aligned in a transverse direction to the wall; and   providing a continuous seaming band longitudinally to each concrete curb, consisting of a plurality of modular anchor strips each comprising a rear anchor part fastened to a respective modular block and a fore seaming part seamed to a fore anchor strip contiguous to the preceding one.   
     
     
         8 . The method for anchoring a waterproofing liner according to  claim 1 , characterised in that the concrete curbs for anchoring the waterproofing liner, are made of porous concrete. 
     
     
         9 . The method for anchoring a waterproofing liner according to  claim 7  characterised by fastening each anchor strip by partially or totally winding it to each modular block, and configuring each anchor strip with at least one side seaming wing for the waterproofing liner. 
     
     
         10 . A system suitable for anchoring a waterproofing liner in synthetic material to a side wall extending in a longitudinal direction of a hydraulic structure in compacted loose material, according to the method of  claim 1 , in which the waterproofing liner is fastened to continuous seaming bands in synthetic material anchored to the side wall, characterised by comprising:
 a plurality of parallely arranged concrete curbs defining a laying surface for the waterproofing liner;   a plurality of continuous seaming bands transversely extending from an upper to a lower position of the side wall;   each continuous seaming band comprising a plurality of modular anchor strips arranged in series along the seaming band, each anchor strip comprising a rear anchor portion fastened to a concrete curb, and a fore seaming portion seamed to a continuous anchor strip.   
     
     
         11 . The system suitable for anchoring the waterproofing liner to the wall of the hydraulic structure according to  claim 10 , characterised by comprising a plurality of extruded concrete curbs that extend, in mutual contact, longitudinally to the wall of the hydraulic structure; and
 in that each seaming band comprises a plurality of axially aligned anchor strips, in which each anchor strip is arranged transversely bridging each concrete curb.   
     
     
         12 . The system suitable for anchoring the waterproofing liner to the wall of the hydraulic structure, according to  claim 10 , characterised in that each anchor strip of a continuous seaming band, comprises a fore seaming part superimposed and seamed to a fore seaming part of a contiguous anchor strip, and a rear anchor part fastened to a concrete curb. 
     
     
         13 . The system for anchoring a waterproofing liner to the wall of the hydraulic structure, according to  claim 10 , characterised in that the concrete curbs extend transversely and/or longitudinally to a sloped wall of the hydraulic structure. 
     
     
         14 . The system for anchoring the waterproofing liner to the wall of the hydraulic structure according to  claim 13 , characterised in that each concrete curb comprises a plurality of concrete modular blocks axially aligned in a traverse direction to the wall of the hydraulic structure. 
     
     
         15 . The system suitable for anchoring the waterproofing liner to the wall of the hydraulic structure according to  claim 14 , characterised in that each anchor strip is partially or totally folded around a concrete modular block. 
     
     
         16 . The system suitable for anchoring the waterproofing liner to the wall of the hydraulic structure according to  claim 1 , characterised in that each concrete curb or modular block consists of a porous concrete. 
     
     
         17 . The system for anchoring the waterproofing liner to the wall of the hydraulic structure, in which the single concrete curbs comprise modular blocks that transversely extend to the wall of the hydraulic structure, characterised by comprising a layer of porous concrete between contiguous concrete curbs. 
     
     
         18 . The system suitable for anchoring the waterproofing liner to the wall of the hydraulic structure according to  claim 10 , characterised by comprising mechanical members for fastening the waterproofing liner to the concrete curbs.