Hasil untuk "Details in building design and construction. Including walls, roofs"

Maria Idália Gomes, Paulina Faria, Teresa Diaz Gonçalves

Pierre-Etienne Gautier

Mehmet Emin Arslan, Erkan Celebi

Selim Pul, Mehmet Emin Arslan

John Stephen Hicks

Roberto Tomasi, Tiziano Sartori

Luis Segura Castillo, Antonio Aguado de Cea

Chang Xu, Cheng Xiangli, Liu Bin

A Parker, M Aschheim, D Mar et al.

Abstract Experimental studies on full-scale straw-bale walls have demonstrated the adequacy of straw-bale wall systems for resisting lateral loads from wind or seismic actions. Critical to the performance of the wall system is the anchorage of mesh reinforcement to the bottom plate and to the roof bearing assembly or top plate. Reported in this paper are the results of experiments examining mesh strength, anchorage strength, and failure mode for a variety of reinforcement meshes (steel, plastic, and hemp) and anchorage details. Because of the potential for new wood preservative pressure treatments to cause corrosion, stainless steel staples driven pneumatically into pressure-treated sill plates were tested in addition to electro-galvanized staples driven pneumatically into untreated sill plates and a heavier gauge staple driven manually into an untreated sill plate. Recommended anchorage details are identified, considering not only the test results but also the many other factors that must be considered in developing reliable, economical, and constructible details.

Jason Alread, Thomas Leslie, Rob Whitehead

Charles F. Mitchell

Charles F. Mitchell

WE Grube

Cut-off walls built by the bentonite-clay slurry trench technique are designed and installed to control flow during site remediation at hazardous waste sites. Non-aqueous phase liquids (NAPL's) in the site groundwater are being sought in remedial investigations as critical contaminants which are likely to significantly affect cut-off wall design and performance. Testing of backfill permeability with these liquids is necessary to ensure that the backfill will resist degradation at elevations where they occur in the groundwater. Recent research has focused on the impact of ion diffusion through the completed barrier. Plastic concrete, attapulgite clay slurries, and biopolymer slurries have been reported in use to meet job-specific requirements. Field test cells, several tens of feet in dimension, and extending to the expected depth of the total cut-off all structure, are increasingly being required by clients as pre-construction hydraulic performance demonstrations. Pump-down measurements applied to these cells provide data from which the permeability of the walls, built with full-scale field equipment, can be calculated. Hydraulic fracturing, verification of bottom-key effectiveness, long-term permeability performance, and significance of diffusion of solutes through the completed groundwater barrier remain areas of sparse published data. This paper reviews environmental slurry wall experience since the early 1980's, with emphasis on performance evaluation.

Learn from both successful and unsuccessful case histories presented by an international group of engineers, scientists, and practitioners in this publication from ASTM. 30 peer-reviewed papers provide experiences and findings related to the design, construction, and quality control methods for slurry walls. In four sections: • State-of-the-Art • Hazardous Waste • Seepage Cutoffs • and Structural.

James Ambrose

Thomas Bock, Helga Meden, Jana Timmermans et al.