Designation: D – AMERICAN SOCIETY FOR TESTING AND MATERIALS Barr Harbor Dr., West Conshohocken, PA Reprinted from the. Buy ASTM D TEST METHOD FOR BEARING CAPACITY OF SOIL FOR STATIC LOAD AND SPREAD FOOTINGS from SAI Global. ASTM: D AASHTO: T Apparatus. Loading platform of sufficient size and strength to supply the estimated load. Hydraulic or mechanical.
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In addition, the load test with the 1. Concrete International, 13 4: Ret-Ser Engineering Agency assisted in setting up field load test equipment, and Mr. Thus, the modulus of subgrade reaction KS is not just a soil parameter, it is also affected by the structural stiffness.
Here, the modulus KS is calculated based on the measured settlement a at the allowable bearing capacity q adefined in Fig. Theoretically, if the contact pressure q and the settlement can be estimated, the modulus of subgrade reaction KS can be determined. Test method for density and unit weight of soil in place by the Rubber Balloon Method D Ruler is approximately 30 cm long.
These methods, however, require knowledge of other soil parameters that are also difficult to estimate, such as the modulus of elasticity and Poisson’s ratio. The individual reaction anchor was designed according to Littlejohn’s formula. Study of field direct shear tests in terrace deposits and Toukoshan conglomerate formation.
Schematic diagram of the plate-load test setup: In Design and performance of mat foundations.
Geologic map of Taichung Basin. In the present study, the near-vertical slopes made by the excavation at the test site could stand by themselves without support. Introductory soil mechanics and foundations, The McMillan Co.
Proctor penetrometer | Matest
Using a factor of safety of 1. This may be because the gravelly cobble deposit is much stiffer than clayey zstm sandy soils. Soil profile of the test site.
A sophisticated subgrade reaction model for mat foundations has also been proposed by Horvath Based on Hansen’s formula, the ultimate bearing capacity was about kN t.
In this regard, it is an important issue to select an appropriate equivalent KS value in the structural design of mat foundations. Thus, results from the three plate-load tests were readily comparable. Although the extrapolation from a small plate to a mat may induce a significant amount of uncertainty, it may be the only feasible choice when dealing with an unusual soil formation without prior experience.
Proctor penetrometer | Matest
Astmm, such simplification is generally needed for a practical structural design of mat foundations and represents the current state of practice in Taiwan. The groundwater table was initially at a depth of 5. Canadian foundation engineering manual.
Each reaction anchor consisted of 12 steel bars. A mat foundation usually consists of three parts: Close-up of gravelly cobble deposits.
Large Scale Plate Load Tests
However, once the foundation settles, the contact pressure redistributes. For foundations on clays, the following relationship is generally accepted: Careful evaluation of the magnitude and variation d1194-49 the KS value across a mat for a given project, using the bearing-capacity theories and the discrete-area method, is warranted in this regard.
A more economic design of the mat foundation for high-rise buildings may be prescribed. Thus, while the plates were seated at different locations beneath the main reaction beam, the ASTM distance specification was not followed. While the importance of engineering geology is well recognized, the results of plate-load tests in the present study contribute to the understanding of the load-bearing characteristics of gravelly cobble deposits.