Showing papers on "Foundation (engineering) published in 1970"

Safety factors in soil mechanics

Abstract: The influences on the safety margin in earthwork and foundation engineering are considered in relation to soil exploration and tests, analysis of stability under the applied loads, and construction...

Floating foundation and process therefor

Abstract: THERE IS PROVIDED A NOVEL FORM OF FLOATING SUBFOUNDATION AND A METHOD OF PRODUCING THE SAME. THE NOVEL SUBFOUNDATION COMPRISES A LAYER OF MODERATELY RIGID, SYNTHETIC, POLYMERIC FOAM PLACED IN THE EXCAVATION FOR A STRUCTURE. A CUSTOMARY RIGID FOUNDATION, SUITABLY OF REINFORCED CONCRETE IS PLACED OVER THE SUBFOUNDATION AND THE STRUCTURE ERECTED UPON THE RIGID FOUNDATION. THE NOVEL SUBFOUNDATION MAKES POSSIBLE GREATLY INCREASED STRUCTURAL LOADS ON SOILS WHICH ARE UNSTABLE AND NOT NORMALLY CONSIDERED CAPABLE OF SUPPORTING HIGH LOADS.

Method of placing a mobile home on a foundation

Abstract: A method of positioning and lowering a mobile home body onto a prepared foundation and pad in semi-permanent location.

Holder for refuse cans

Abstract: A new and improved refuse can holding apparatus permits easy removal and mounting of associated refuse cans, maintaining the cans in a stable relation with respect thereto while such cans are mounted. A new and improved apparatus for securing the device with respect to its associated mounting base is provided. The base may be supported by either a foundation, which is embedded in the ground, or a base which is mounted with respect to the floor or ground.

Method of multiple injection

Abstract: A method of simultaneous termite-proofing and waterproofing of the soil about the foundation of a building.

Bearing capacity of foundation piles: state of the art

Abstract: THE PURPOSE IS TO PRESENT THE STATE OF THE ART CONCERNING BEARING CAPACITY OF FOUNDATION PILES. TOPICS PRESENTED INCLUDE (1) SOIL PROPERTY CHANGES DUE TO DRIVING IN COHESIONLESS AND COHESIVE SOILS AND (2) DETERMINATION OF BEARING CAPACITY FOR SINGLE PILES AND PILE GROUPS IN COHESIONLESS AND COHESIVE SOILS. THE METHODS FOR DESIGN OF SINGLE PILES INCLUDE THE STATIC FORMULA, THE DYNAMIC FORMULA, AND A RECENTLY DEVELOPED NUMERICAL METHOD. THE NUMERICAL METHOD IS USED TO PREDICT IMMEDIATE PILE MOVEMENT UNDER STATIC LOAD AND ULTIMATE PILE LOAD. THE METHODS FOR DESIGN OF PILE GROUPS ARE EMPIRICAL IN NATURE AND INCLUDE DESIGN AGAINST BEARING CAPACITY FAILURE, EXCESSIVE PILE AND SOIL SETTLEMENT. BECAUSE THIS IS A STATE-OF-THE-ART PRESENTATION, NO DEFINITE CONCLUSIONS ARE GIVEN CONCERNING THE USE OF ONE DESIGN METHOD IN PREFERENCE TO ANOTHER. IT IS SHOWN THAT NO SINGLE METHOD HAS BEEN ADOPTED FOR GENERAL USE BY DESIGNERS AT THIS TIME EXCEPT FOR FIELD LOAD TESTS, WHICH ARE GENERALLY USED ON LARGE CONSTRUCTION PROJECTS INVOLVING PILE FOUNDATIONS. /AUTHOR/

A method for driving a foundation element into the earth by means of vibration

Abstract: A method for driving a foundation element into the earth by means of vibration. According to the invention at least one perforated supporting member is taken along by the foundation element when this element is vibrated into the earth. This perforated supporting member may be a perforated plate or a grid composed of upstanding partitions.

Method of making pile fabrics

Abstract: A METHOD OF PRODUCING A PILE FABRIC BY NEEDLING A STRUCTURE COMPRISED OF A LAYER OF FIBROUS MATERIAL, A FOUNDATION LAYER AND A STRIPPABLE LAYER, BONDING THE NEEDLED FIBERS IN THE STRUCTURE, AND REMOVING THE STRIPPABLE LAYER.

Strengthening of muda dam foundations using cable anchors

Abstract: THE PRESENCE OF NEAR-HORIZONTAL MUDSTONE BANDS IN THE GENERALLY MASSIVE QUARTZITE MADE IT NECESSARY TO STRENGTHEN THE FOUNDATIONS OF MUDA DAM AGAINST SLIDING. RE-STRESSABLE CABLE ANCHORS, EACH LOADED TO 270 TONS, WERE ADOPTED FOR THIS PURPOSE. THE PAPER EXPLAINS THE BASIS OF THE CALCULATIONS FOR FOUNDATION STRENGTHENING, DESCRIBES THE INSTALLATION OF THE CABLE ANCHORS AND GIVES THE RESULTS OF SUBSEQUENT TESTS CARRIED OUT ON THEM BEFORE AND AFTER IMPOUNDING. /AUTHOR/

Some Effects Of The Layering Of The Soil On WavePropagation And Foundation Vibrations

Abstract: When one measures soil or foundation vibrations, one often has the following problem. The soil profile is only known down to a certain depth, and there is some uncertainty about the behaviour of the thin top layer. One wants to know the effects of a stiff underlying soil or of a soft top layer. A layered model of the soil may better explain the experimental results. By integration in wavenumber domain, the wave-field due to a harmonic point-load can be calculated. The solution then can be used to determine the dynamic stiffness of a rigid or flexible foundation. Results of some layered situations are presented, and the different effects on the horizontal and vertical components of the vibrations of the soil and of the foundation are discussed. Experimental results of both problems (wave propagation and foundation vibrations) and both components, measured at the same site, are compared with homogeneous and layered theory.

Building foundation with frost deflector

Abstract: A building foundation that comprises a deflector so that frost which may accumulate under the building will be deflected. This prevents the frost from raising the foundation off the ground.

Metal foundation pile

Abstract: A metal foundation pile, which is composed of a plurality of parallel metal bars, which are fixedly interconnected by metal cross-members and carry at least one pile shoe at the bottom thereof. The cross-members are spaced along the length of the bars and are driven into the earth with the bars when the piles are sunk in the ground.

Method of laying a foundation for a structural element under water

Abstract: Under a structural element and around a supply place a crater is made by laying a dike of foundation material in the space under the structural element and around the supply place and the space around said crater is subsequently filled up with foundation material by supplying suspension of foundation material with water into the crater and by causing it to flow over the edge of said crater. With this method the edge of the crater grows gradually so as to form a continuous layer of foundation material. The suspension of foundation material with water flowing over the edge of the crater is heavier than silt found around the crater resulting in the suspension driving the silt before it out of the space without being mixed with the silt.

Engineering geology properties of the foundation soils of concrete structures at the Kanev hydroelectric development

Abstract: 1. The complexity of the engineering geology conditions of the area of the concrete structures of the Kanev hydro development, especially the foundation of the hydroelectric station, which is due to the variegated geologic structure and inhomogeneity of the indexes of the physical, mechanical and seepage properties of the soils, is explained by the peculiarities of the formation of the thick stratum of Quaternary deposits and complex character of development of this segment of the valley of the Dniepr River. 2. In connection with the aforementioned peculiarities of the geologic structure and the imperfection of the rock-drilling technique used in the investigations, a number of engineering-geology problems of the foundations (distribution of weak soils, natural density of the flooded sands, etc.) were solved conclusively only during the period of geologic documentation of the foundation pits. 3. The presence of weak soils in the stratum of the station foundation often necessitated the use of additional measures when preparing it (removal of weak soils, compaction of sands having an insufficient density, etc.).