Practical engineering answers for design institutes, contractors and dam owners — bag selection, inflation systems, anchoring, control and durability, written from our own design tables and reference projects.
12 articles · six topics — selection, design, installation, control, cost and operation · written from our own design tables and 132 reference projects.
Two deflatable systems, one factory — compared on structure, debris, sediment, overflow, ice and maintenance, with the trade-offs on both sides stated plainly.
The decision in the order it actually happens: duty, filling medium, height class, anchorage, control level — and the site data that turns a catalogue page into a quotation.
The commissioning filling test, the dry-season and rainy-season operating rules, and the four-tier maintenance ladder — condensed from the manual we ship with every dam.
Why a rubber dam has no list price: the seven cost drivers, the minimum reference price per square metre, and how lead time is confirmed per project.
Holding fresh water against the salt tide near Bohai Bay — the 5.5 m class bag and anchoring schedule, and why deflatable dams win on plain tidal rivers.
A 5 m bag across 260 m of an ice-covered great river — the 5 m class matrix data, M36 anchoring, and the winter lay-up strategy that handles the spring ice run.
Span, head, obstruction, actuation and cost — a nine-factor comparison of the inflatable weir and the steel gate, with real project numbers, and the two questions that settle most decisions.
The JBD selection ladder explained: canvas grades J1010–J3636, the 2-ply → 3-ply step at 4.5 m, and why vulcanizing pressure matters as much as laminate.
Pump room vs blower, crest overflow behaviour, response speed and winter operation — plus the internal-pressure ratio logic behind the water-filled design.
Three control levels, what each one reads from the river, and the failure mode each one trades away — plus how to close the gaps in a tender line.
Clamp-plate vs wedge anchoring — plate and bolt schedules from M20 to M36, the forces up to 117 t/m, and corrosion protection in practice.
No honest fixed number — instead: the compound’s verified tensile and elongation values, the five degradation drivers, and the factory decisions that prevent delamination.
