3D Shaped Waterproofing Membranes for Tieback Detail Areas
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Solution Overview
Problem
Existing reverse tanking waterproofing methods are labor-intensive for creating continuous moisture barriers in detail areas and surface irregularities, such as tiebacks and penetrations, due to the need for manual cutting and arrangement of membranes and application of adhesive strips.
Innovation Solution
The use of three-dimensional shaped waterproofing membranes with a flat collar portion, which can be thermoformed to fit over surface irregularities and seamed with conventional membranes, along with corresponding molded support structures to prevent collapse under concrete weight, reducing the need for extensive labor and time in creating a continuous barrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional sheet-form reverse tanking membranes are used for waterproofing detail areas like tiebacks, then waterproofing coverage is achieved, but labor intensity and installation time increase significantly due to manual cutting, arrangement, and adhesive strip application
Solution Approach 1:
The waterproofing system is segmented into pre-formed three-dimensional shaped membranes with integrated collars that fit over specific detail areas like tiebacks. Each shaped membrane is a self-contained unit that eliminates the need for manual cutting and arrangement of conventional sheets, directly reducing labor intensity while maintaining waterproofing coverage.
Solution Approach 2:
The three-dimensional shaped membranes are pre-formed with the appropriate geometry and integrated collars before installation. This preliminary shaping action eliminates the need for on-site cutting and arrangement, allowing workers to simply install the pre-configured membranes, thereby significantly reducing installation time and labor intensity.
2Reliability
If three-dimensional shaped membranes are used to fit over surface irregularities, then waterproofing continuity is improved, but device complexity increases due to the need for specialized molded shapes and support structures
Solution Approach 1:
The collar structure and the three-dimensional shaped membrane are merged into a single integrated unit. The collar is formed as part of the membrane itself rather than being a separate component, which simplifies the overall device while ensuring waterproofing continuity by eliminating potential failure points at collar-membrane interfaces.
Solution Approach 2:
The three-dimensional shaped membrane with integrated collar serves multiple functions simultaneously: it provides the waterproofing barrier, creates a seal around the surface irregularity, and structurally supports itself without requiring additional separate components. This multi-functionality reduces device complexity while maintaining reliability.
3Adaptability or versatility
If manual cutting and arrangement of membranes is performed for tieback areas, then adaptation to surface irregularities is achieved, but loss of time increases due to painstaking labor for each detail area
Solution Approach 1:
The membranes are pre-shaped into three-dimensional forms with integrated collars that match specific surface irregularities like tiebacks before installation. This preliminary adaptation action eliminates the need for time-consuming on-site cutting and arrangement, allowing workers to simply install the pre-adapted membranes, thereby dramatically reducing installation time while maintaining adaptability.
Solution Approach 2:
The three-dimensional shaped membranes are created as precise copies or molds of the surface irregularities they need to cover. By having pre-formed shapes that replicate the geometry of tiebacks and other detail areas, the system achieves perfect adaptation without requiring manual measurement and cutting during installation, thus eliminating time loss.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces labor costs and installation time by allowing for quick and efficient creation of continuous waterproofing barriers around tiebacks and other surface irregularities, enabling faster completion of large-scale waterproofing projects.
Implementation Method 1
a pressure-sensitive adhesive layer operative to bond with post cast concrete
Implementation Method 2
The adhesive layer is covered by an elastomeric protective coating layer... to decrease the tack of the adhesive
Implementation Method 3
three-dimensional shaped waterproofing membranes which can be thermoformed to fit over surface irregularities
Data Source
AI summary
Shaped waterproofing membranes having three-dimensional contours are useful for the “reverse tanking” waterproofing of detail areas such as those presented by “tiebacks,” pipes, pile caps, and other irregularities that occur on concrete formworks and other civil construction or building surfaces. A preferred method for making such membranes is to thermoform a membrane laminate, having a carrier support sheet, waterproofing adhesive, and optionally a protective coating layer, as a single unit.