uplift pressure

Among other things, a problem with the uplift pressure was resolved.

When runoff begins, uplift pressures develop on the underside of the shore fast cover.

An extensive underdrainage system was installed to reduce uplift pressures under the lining.

Keywords: Anchors, rock, transmission lines, foundations, tests, loads, design criteria, uplift pressure.

This design offers the concrete slab as an impervious wall to prevent leakage and also a structure without concern for uplift pressure.

Uplift pressures (buoyancy) can be reduced by internal and foundation drainage systems which reduces the pressures.

Shallow pressure relief drains were installed to limit uplift pressures and control base instability in the deepest parts of the excavation.

Monitoring of the groundwater levels in the underlying aquifer and comparisons with results from flow models were used to successfully control uplift pressures during construction.

A disadvantage of gravity dams is that due to their large footprint, they are susceptible to uplift pressures which act as a de-stabilising force.

Uplift pressure on the dam had unexpectedly increased as well and engineers worried that the structure's grout curtain had been damaged.

One of the important forces which control the stability of concrete gravity dams is the uplift pressure due to seepage through the rock in the foundation.

Water that collected in the drainage pipes under the dam to relieve the hydrostatic uplift pressure was carried off in this manner as well.

Other miscellaneous loads that affect a dam include: ice and silt loads, and uplift pressure.

Granular pile anchors are innovative and effective in resisting the uplift pressure exerted on the foundation by a swelling expansive soil.

Using sand and the various two dimensional models supplied it is possible to determine flow lines, seepage rates and the distribution of uplift pressures.

Key words : uplift pressures, concrete dam, foundation drains, piezometers, uplift cells, temperature survey.

In January 1990 seepage and high uplift pressures were detected by TRWD at the south abutment of the spillway.

It was badly damaged by Hurricane Gilbert in September 1988; a clerestory window broke and let the wind into the building, placing significant uplift pressure on the roof deck.

Flood-proofing the lower levels of buildings by sealing them against water penetration requires that they be made strong enough to withstand cracking from the lateral and uplift pressure of the water.

While they can be made safe to build on, we don't want to take any chances that demolition charges and crashing debris could create an uplift pressure that might cause damage to surrounding properties."

Detailed assessments of construction records to assemble relevant geological and foundation conditions, foundation excavation, preparation, and treatment aspects, and particular structural foundations were vital in discerning the cause for the high uplift pressures.

Laboratory and field experiments show that many kinds of solid objects are readily uplifted by an upfreezing ice surface and that uplift pressures can approximate the heaving pressures for soils with similar pore sizes.

However, as a precautionary measure, pressure relief holes are to be drilled into the floor of the passageway to ensure there will not be any uplift pressures on the concrete floor when the passageway is dewatered.

Run-off from roofs or paved areas should not be led to the footing drain because of the possibility of destructive uplift pressures developing under the floor slab during severe rain storms that overtax the drainage system.

The paper aims to define an interior region on large low buildings within which lower external uplift pressures can be used for design rather than those recommended by the 1985 Supplement to the National Building Code of Canada.