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.
The values back-calculated with Terzaghi’s formula are the lowest. For foundations on clays, the following relationship is generally accepted: These samples were used in the laboratory for determination of unit weight, specific gravity, and particle-size distribution.
It can also be time dependent, since much of the settlement of mats on deep compressible soils is due to consolidation. As shown in Table 1, the values back-calculated with Terzaghi’s formula are lowest.
This reinforces s1194-94 observation about the relationship between the modulus of subgrade reaction and the size of the plate in the case of the gravelly cobble deposit. The groundwater table was at a depth of about 5.
Based on Hansen’s formula, the ultimate bearing capacity was about kN t. The plate-load test has been a traditional in situ aastm for estimating soil modulus for the purposes of estimating the settlement of spread footings. Since the voids within the gravelly cobble deposit at the test site are filled with sandy soils, the cohesion was assumed to be zero.
Evaluation of coefficients of subgrade reaction. However, in the present study of the gravelly cobble deposit, the relationship between the ultimate bearing capacity and the plate size is not exactly linear. The soil profile of the test site is shown in Fig. Beneath the alluvial fan gravel and cobble deposits is the Late Pleistocene conglomerate formation, which extends as deep as m.
Proctor penetrometer | Matest
The main reaction beam, measured at 13 m by 1. This paper presents the result of plate-load tests conducted on a gravelly cobble deposit in Taichung Basin, Taiwan. Figure 10 adtm a plot of the measured ultimate bearing capacity versus the size of the plate used in the load test. The third layer, from 2 to 2.
Prototype load-bearing tests for foundations and pavements. To accommodate larger size plates, it was decided to use eight reaction anchors, each carrying astmm allowable load of up to kN t. Thus, while the plates were seated at different locations beneath the main reaction beam, the ASTM distance specification was not followed.
Proctor penetrometer | Matest
This may be because the gravelly cobble deposit is much stiffer than the soils considered by Terzaghi. Note that the characteristics of coarse granular materials adtm be better estimated by several other methods, such as shear- and compression-wave measurements, Becker Hammer Drill penetration tests, and the photo-sieving method.
Use of a single parameter such as the modulus of subgrade reaction to characterize the response of a soil to an applied load is thus an oversimplified concept. These field tests provide an opportunity to examine the applicability of existing theories on bearing capacity and subgrade reaction in this geologic formation.
In this calculation, a reduction factor of 0. The ultimate strength of each steel asym was kN A more economic design can be prescribed according to the results of the present study.
Before applying the loads, the pressure gauge and the dial gauge were set to zero. A mat foundation usually consists of three parts: Close-up of gravelly cobble deposits.
Soil profile of the test site. Note that reseating of each plate before loading was necessary, as the three plates were placed at different locations. The Tatu Terrace is mainly composed of Pleistocene sandstone and mudstone.
However, once the foundation settles, the contact pressure redistributes. Plate-load test setup and procedure The test site was excavated to a depth of 6. Schematic diagram of the d1149-94 test setup: Each reaction anchor consisted of 12 steel bars.
The KS value may be determined by semiempirical methods such as that proposed by Vesic The space between the top and base plates is backfilled with selected soils.