Showing papers on "Settlement (structural) published in 1976"

The behaviour of bored piles in weathered diabase

Abstract: In the design of foundations for the new Johannesburg Academic Hospital it was necessary to predict the settlement of piles as accurately as possible because of the very low tolerance of the struct...

Sediments and settlement in Southern Greece.

Abstract: Six sample areas of southern Greece were selected for a study of settlement patterns from the earliest human occupation (Fig. 1). Two had been intensively surveyed for sites: the south-west Argolid Peninsular, the Agiofarango Gorge in south Crete; two had been extensively surveyed — the Sparta and Helos Plains; and two had a good number of sites discovered over a long period of investigation the island of Melos and the Argos Plain. The location of suspected occupation sites was examined in the light of local geology, soils, geomorphology, water supplies and defensive possibilities, and where applicable, marine resources. The apparent relationship in space between sites of the same period was also studied.

Frost Loadings on Underground Pipe

Abstract: pipe was designed and is but one of several supervenient forces which create the dynamic environment in which an underground pipe functions. Other loads, thus far accommodated only by pipe design safety factors, result from shifting earth due to landslides, seismic shifts, and tremors; nearby construction and unequal settlement; and expansion and subsidence of certain clay soils with changes in moisture content. This article will give priority to frost loading as a factor indigenous to northern US and Canada and one on which

Displacements around tunnels in soils

Abstract: This report summarizes one year of research on ground movements around tunnels in soil. Data from available case histories of tunnels constructed in sands and gravels, stiff clays, and soft clays is combined with the results of field observations and a model study to describe sources and volumes of ground lost around tunnels, the relationship between volume of ground lost and volume of surface settlement, and the shape of the surface settlement trough. Horizontal strains occurring with the surface settlement trough are described, and their implications for building damage are discussed. The volume of surface settlement is affected not only by the volume of lost ground, but also by the volume of expansion or compression in the soil around a tunnel. The surface settlement trough can be approximated by relationships presented by Peck (1969), except in cases where the settlements are very small (elastic) or very large (greater than 0.5 percent of the tunnel depth). In these cases, the settlement trough may be wider or narrower, respectively, than estimated. The results of field and analytical studies of interference effects between settlement troughs for multiple tunnels are presented. The results of a field observation program of settlement measurements on the Washington, D.C. Metro Section F2a tunnels are presented. A third section of the report is a progress report on a model study in which ground movements around a model tunnel in sand were measured using photogrammetric procedures and displacement gages.

Prehistoric Settlement Patterns around Tepe Yahya: A Quantitative Analysis

Abstract: TEPE Yahya is a prehistoric mound in southeastern Iran which has been investigated for the past several years. Following its discovery and initial survey in 1967, five full seasons of excavation have been conducted to date. As part of the research program for the 1973 season, a study was undertaken of the feasibility of uncovering evidence of habitation in the area adjacent to the site by means of a statistical survey of sherd distribution.

Correcting method of unnuniformly settled bottom plate of welded cylin drical steel tank

Abstract: PURPOSE:Low-cost and short-term correction work of an un-uniformly settled tank, without deranging the sand bed keeping balance with the load at the final stage of settlement.

Powdery material feed to metering device - has down tube inlet protruding above settlement hopper floor

Abstract: The equipment incorporates a settling hopper, to which the material is delivered by a pipe, and a vertical down tube in the hopper base delivering it to the metering unit. The down tube (3) protrudes into the hopper (2) so that its inlet (11) is above the level of the hopper floor (12). Baffles (4) are mounted between the feed pipe (1) and the down tube inlet, and there are devices on the hopper floor to loosen the material. The feed pipe can discharge into the side of the hopper, and the lower edges of the baffles can be at the level of the down tube inlet or below it. The baffles can be of sheet metal, adjustable for height.

Supervisory device of tank settlement

Abstract: PURPOSE:Leveling instruments are installed on the extended margin of a tank's bottom plate to forecast and supervise destructive danger due to distortion caused by un-uniform settlement.

Device for locally increasing soil bearing strength - for temporary foundations and counteracting settlement

Abstract: Process for increasing locally the bearing strength of light soils in preparation for the laying of foundations which will eventually support a heavy load, also allows any settlement which may occur in the soil below the foundations to be compensated for Its use avoids the necessity for driving piles where foundations may only be temporary, eg erection of large cranes The process consists of sinking a rectangular box (4) open at both ends vertically into the ground While the box is being sunk a lubricant is applied to its lower ends The soil (3) which is enclosed by the box is compressed and compressible material is then placed on top under pressure and the foundation laid

Winter earthwork: embankment construction using frozen soil

Abstract: Construction of embankments using frozen soils can cause excessive settlement and loss of stability after the soil thaws. This paper contains observations and test results obtained during cold weather construction of a small embankment. Included in the construction phase was ripping of a frozen granular soil, placing and compacting frozen embankment material, and installation of settlement plates and thermistors. Field tests were conducted to determine the size and gradation of the frozen chunks used in the embankment, monitor dry density and moisture content during compaction of the fill, and measure settlement and soil temperatures within the embankment. Results from the field tests were analyzed to assess the effectiveness of field compaction of frozen soil and to quantify settlements that occur as the soil thaws. The results provide the basis for recommendations concerning winter earthwork.

Settlement of an embankment

Abstract: Following some theoretical observations on soil settlement the object of experimental sections constructed on a motorway embankment is explained. The situation of the sections, the earthworks, the subsoil and the vertical drainage systems used are described. The tests carried out and the instrumentation of the sections are outlined. It is concluded that the several drainage systems seem to be nearly equivalent with regard to the settlement of the embankment. In a continuation of this article the results of the experiments will be discussed in greater detail. /TRRL/

Settlement and tilting of a rigid rectangular foundation on a compressible foundation bed of finite thickness

Abstract: Recently, there had as yet been no method developed for calculation of set t lement and tilting of rigid rec tangular foundations underlain by an incompressible (rock) foundation bed. Fur thermore , the scheme of a compress ib le l aye r has been widely used in designing foundation plates having great extent and no underlying rock layer [1, 2] for an approximation of design sett lement to aetuat settlement. The problem of using that method for calculating tilting requires supplementary study. Use of the scheme of a compress ib le layer instead of the scheme of a compress ib le ha l f -space diminishes the design values of sett lement and tilting of foundati ons.

High turbidity waste water treatment

Abstract: PURPOSE:To promote the settlement and water clarification of suspended particles in treament of various industrial waste water of the turbidity mainly from clay, silica and plaster, etc.

Printer system for taxiimeter

Abstract: PURPOSE:An operation of taxi meter, derives the printer to issue the receipt at the settlement of accounts.

Spherical tank provided with correction mechanism of unnuniform settle ment

Abstract: PURPOSE:Providing for large un-uniform settlement of a tank's foundation, the tank's strut is previously designed to build in at its base a function for correcting un-uniform settlement.

Piled foundation for a railway embankment

Abstract: IT WAS NECESSARY TO CONSTRUCT A NEW RAILWAY EMBANKMENT OF 7 M HEIGHT VERY CLOSE TO AN EXISTING TRACK CARRYING HIGH-SPEED TRAFFIC FOR 18 HOURS DAILY. SINCE THE SUBSOIL WAS EXTREMELY SOFT, WITH LOW UNDRAINED STRENGTH, THE RISK OF FAILURE AND OF LARGE HORIZONTAL DISPLACEMENTS OF THE EXISTING TRACK HAD TO BE TAKEN INTO ACCOUNT. A SUFFICIENTLY SAFE AND ECONOMICAL SOLUTION WAS PROVIDED BY FOUNDING UPON A GRID OF TIMBER PILES PROVIDED WITH SEPARATE PRECAST CONCRETE SCREW POINTS, THE MINIMUM GRID SPACING BEING 1.3 M. THIS TYPE OF CONSTRUCTION WAS EMPLOYED ON 38 PER CENT OF THE TOTAL AREA, WHICH ENSURED A RELIABLE ARCHING ACTION OF THE EARTH FILL. THE AVERAGE LENGTH OF PILE WAS 8 M, THE TOTAL NUMBER OF PILES WAS 1800, THE MAXIMUM SETTLEMENT WAS 13.4 CM AND NO HORIZONTAL DISPLACEMENT OF THE TOE OF THE EMBANKMENT WAS OBSERVED. THE COVERING ABSTRACT FOR THE CONFERENCE IS IRRD NO 306088.