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Design equation for inclined ground anchor fixed length in a cohesionless soil
54A
813119 SIMPLE IN SITU LOAD TEST FOR S H A L I ~ FILL Charles, J A; ~riscoll, R Ground Engng, V14, NI, Jan 1981, P31-36
813124 CYCLIC AXIAL RESPONSE OF A SINGLE PILE Poulos, H G J Geotech Emgng Div ASCE, V107, NGT1, Jan
1981, P41- 58 In order to establish the in situ settlementtime characteristics of shallow filled sites urger typical low rise construction loading, a simple test using a weighted rubbish skip has been developed. Results are presented for a 1-month test comducted on a redevelopment site in London, which suggest that the fill may be mare suitable as a foundation material than might have been expected. Auth. 813120 PILE TESTING Flemdng, K Civ Engng, London, Dec 1960, P27-33 Discusses static load test procedures, load application and measurement in static testing, settlement measurement, reporting and interpretation of results, dynamic load testing, integrity testing. 813121 SOME SECRETS TO BUILDING STRUCTURES ON EXPANSIVE SOILS Kantey, B A Civ Engng, NY, VS0, N12, Dec 1980, P53-55 Discusses the problem of expansive soils and how they can be recognised in the field, and the use of the plasticity index to estimate heave. Briefly describes 3 methods of building on these soils, the isolation, rigid and flexible solutions. 813122 APPLICATION OF THE FAILURE STATE IN UNDRAINED SIMPLE SHEAR TO THE SHAFT CAPACITY OF DRIVEN PILES Randolph, M F~ Wroth, C P Geotechnique, VB1, NI, March 1981, P143-157 A critical review is made of the variation c~ undrained shear strergth with the value of intermediate principal stress, so that the strength in plane strain conditions may be compared properly with the value measured in triaxial compression. The behaviour of clay in simple shear is studied, and it is suggested that, depending on the initial stress conditions, there may be a change of mode of behaviour from one preferred set of failure planes to another. This suggestion is invoked to explain the past-peak behaviour, and has been used to provide a rational explanation for the variation of the apparent angle of friction observed in simple shear tests and how this would affect pile capacity.
813123 PILE LOAD TESTS: CYCLIC LOADS AND VARYING LOAD RATEs Kraft, L ~; CGx, W R; Ve~ner, E A J Geotech Engng Div ASCE, VI07, NGTI, Jan 1931, Pl-19 Two series of axial load tests were performed on four 14 inch diameter, open-end, steel pipe piles at an interval of about 320 days. Pile lengt~hs of 40 ft or 50 ft were installed below conductors driven to depths ranging from ll5 ft to 320 ft into a strong underconsolidated clay. Each pile was subjected to as many as 26 tests. Data presented includes: (1) compression and tension tests, (2) tests performed at different times after driving and after previous tests, and (3) incr~nental loading and constant rate of loading.
A number of solutions have been obtained for a typical offshore pile, to determine the influence of a number of the input parameters on the computed cyclic response. More significant parameters include the critical shear strain at which significant degradation of skin friction occurs, the rate of loading on the pile, and the distributions of static skin friction and soil modulus along the pile.
813125 STREssEs IN SOIL AROUND VERTICAL COMPRESSIBLE PILES. TECHNICAL NOTE Sar~aran, K S; Kriahnaswamy, N R; Sharas Chandra, B K J Geotech Engmg Div ASCE, V107, NGT1, Jan 1981, P107-112 Gives tables of stress coefficient for a range of stiffness factors representing a highly flexible to a very rigid pile, with L/d ratios from 10-100. 813126 SLOPE EFFECT ON HOUSE SHRINK-SWELL M O U N T S Schmertmann, J Hi Crapps, D K J Geotech Engng Div ASCE, V106, NGT12, Dec 1980, P1327-1344 Describes observed differential movements of footing foundations causing damage to houses on clay natural slopes near Galnesville, Florida, USA, and discusses the phenomenon in terms of construction methods and the interrupted natural drainage of the slope. 813127 METHODOLOGY FOR FOUNDATIONS ON EXPANSIVE CLAYs O'Neill, M W; Poormoayed, N J G e o t e c h E n g n g D i v ASCE, Vl06, NGT12, Dec 1980, P1345-1367 Recent research into the behaviour of expansive clays has led to rational procedures for quantifying swell and shrinkage and differential movements in expansive subgrades. These procedures, used in conjunction with modern n~nerical techniques for amalyslng the static interaction of foundations ani soils s have permitted the development of rational foundation design procedures that can be employed in a design office. This paper surveys recent advances in these areas anl sm~narises the salient features of some of the mere prominent studies. Auth. 813128 INTERACTION OF PILES AND CAP IN PILED FOOTINGs. TECHNICAL Akinmusuru, J 0 J Geotech Engng Div ASCE, V106, NGTII, Nov 1980, P1263-1268 Describes a lab study to investigate how the separate ultimate bearing capacities of pile groups and footings (caps) are related to the resulting bearing capacities of the piled footings formed as a c~nbination of group and cap. 813129 BEHAVIOUR OF FRICTION PILEs IN ICE AND ICE-RICH SOILS Morgenstern, N R~ Roggensack, W D; Weaver, J S Can Geoteeh J, VIT, N3, Aug 1980, P405-415
813119 SIMPLE IN SITU LOAD TEST FOR S H A L I ~ FILL Charles, J A; ~riscoll, R Ground Engng, V14, NI, Jan 1981, P31-36
813124 CYCLIC AXIAL RESPONSE OF A SINGLE PILE Poulos, H G J Geotech Emgng Div ASCE, V107, NGT1, Jan
1981, P41- 58 In order to establish the in situ settlementtime characteristics of shallow filled sites urger typical low rise construction loading, a simple test using a weighted rubbish skip has been developed. Results are presented for a 1-month test comducted on a redevelopment site in London, which suggest that the fill may be mare suitable as a foundation material than might have been expected. Auth. 813120 PILE TESTING Flemdng, K Civ Engng, London, Dec 1960, P27-33 Discusses static load test procedures, load application and measurement in static testing, settlement measurement, reporting and interpretation of results, dynamic load testing, integrity testing. 813121 SOME SECRETS TO BUILDING STRUCTURES ON EXPANSIVE SOILS Kantey, B A Civ Engng, NY, VS0, N12, Dec 1980, P53-55 Discusses the problem of expansive soils and how they can be recognised in the field, and the use of the plasticity index to estimate heave. Briefly describes 3 methods of building on these soils, the isolation, rigid and flexible solutions. 813122 APPLICATION OF THE FAILURE STATE IN UNDRAINED SIMPLE SHEAR TO THE SHAFT CAPACITY OF DRIVEN PILES Randolph, M F~ Wroth, C P Geotechnique, VB1, NI, March 1981, P143-157 A critical review is made of the variation c~ undrained shear strergth with the value of intermediate principal stress, so that the strength in plane strain conditions may be compared properly with the value measured in triaxial compression. The behaviour of clay in simple shear is studied, and it is suggested that, depending on the initial stress conditions, there may be a change of mode of behaviour from one preferred set of failure planes to another. This suggestion is invoked to explain the past-peak behaviour, and has been used to provide a rational explanation for the variation of the apparent angle of friction observed in simple shear tests and how this would affect pile capacity.
813123 PILE LOAD TESTS: CYCLIC LOADS AND VARYING LOAD RATEs Kraft, L ~; CGx, W R; Ve~ner, E A J Geotech Engng Div ASCE, VI07, NGTI, Jan 1931, Pl-19 Two series of axial load tests were performed on four 14 inch diameter, open-end, steel pipe piles at an interval of about 320 days. Pile lengt~hs of 40 ft or 50 ft were installed below conductors driven to depths ranging from ll5 ft to 320 ft into a strong underconsolidated clay. Each pile was subjected to as many as 26 tests. Data presented includes: (1) compression and tension tests, (2) tests performed at different times after driving and after previous tests, and (3) incr~nental loading and constant rate of loading.
A number of solutions have been obtained for a typical offshore pile, to determine the influence of a number of the input parameters on the computed cyclic response. More significant parameters include the critical shear strain at which significant degradation of skin friction occurs, the rate of loading on the pile, and the distributions of static skin friction and soil modulus along the pile.
813125 STREssEs IN SOIL AROUND VERTICAL COMPRESSIBLE PILES. TECHNICAL NOTE Sar~aran, K S; Kriahnaswamy, N R; Sharas Chandra, B K J Geotech Engmg Div ASCE, V107, NGT1, Jan 1981, P107-112 Gives tables of stress coefficient for a range of stiffness factors representing a highly flexible to a very rigid pile, with L/d ratios from 10-100. 813126 SLOPE EFFECT ON HOUSE SHRINK-SWELL M O U N T S Schmertmann, J Hi Crapps, D K J Geotech Engng Div ASCE, V106, NGT12, Dec 1980, P1327-1344 Describes observed differential movements of footing foundations causing damage to houses on clay natural slopes near Galnesville, Florida, USA, and discusses the phenomenon in terms of construction methods and the interrupted natural drainage of the slope. 813127 METHODOLOGY FOR FOUNDATIONS ON EXPANSIVE CLAYs O'Neill, M W; Poormoayed, N J G e o t e c h E n g n g D i v ASCE, Vl06, NGT12, Dec 1980, P1345-1367 Recent research into the behaviour of expansive clays has led to rational procedures for quantifying swell and shrinkage and differential movements in expansive subgrades. These procedures, used in conjunction with modern n~nerical techniques for amalyslng the static interaction of foundations ani soils s have permitted the development of rational foundation design procedures that can be employed in a design office. This paper surveys recent advances in these areas anl sm~narises the salient features of some of the mere prominent studies. Auth. 813128 INTERACTION OF PILES AND CAP IN PILED FOOTINGs. TECHNICAL Akinmusuru, J 0 J Geotech Engng Div ASCE, V106, NGTII, Nov 1980, P1263-1268 Describes a lab study to investigate how the separate ultimate bearing capacities of pile groups and footings (caps) are related to the resulting bearing capacities of the piled footings formed as a c~nbination of group and cap. 813129 BEHAVIOUR OF FRICTION PILEs IN ICE AND ICE-RICH SOILS Morgenstern, N R~ Roggensack, W D; Weaver, J S Can Geoteeh J, VIT, N3, Aug 1980, P405-415