Jun 03, 2017 in this video i have talked about the plate load test which is used to find the bearing capacity and the settlement of the foundation. Pre ure on the jack was recorded from a calibrated pressure gaug pia ed b tween the jack and hydraulic pump. This is the most widely used method for the design of flexible pavement. Evaluation of allawable bearing capacity of soil by plate bearing. Plate load test determine bearing capacity of soils. Load was applied on the plate by a hydraulic jack of 100 ton capacity by rea tion obtained from he keruledge. The results showed that the plate settlements of the soil under three tanks were within the permitted.
This test is a destructive method, in which a specimen of a standard shape and dimensions prepared according to astm d 638tandard test method for tensile properties of. The load was applied via a hydraulic jack reacted against a steel beam that was counterbalanced by dead weight. The test shall be carried out at the same level of the proposed foundation level oras directed by the engineer while the same conditions to which the proposed foundation will be subjected should be prepared if possible. Soil testingproceduresandtestingequipment plateloadtest. Place the hydraulic jack on the plate and place the surcharge above the jack piston up to steel beam level. Apply the load to the plate in steps by means of hydraulic jack pushing against the counter weight until reaching the maximum test load. Astm d1194 94 standard test method for bearing capacity. Oct 19, 2016 in the enter load test report details page, type a name for your report in report name.
The test plate shall be placed over a fine sand layer of maximum thickness of 5mm. The ultimate bearing capacity is taken as the load at which the plate starts sinking at a rapid rate, i. The figure shown below fig3 shows a set of typical load settlement curves. This test method can be used as part of a procedure for soil investigation for foundation design. In case of doubt, the consistency of the soil under test shall be determined atvariousdepthsup toadepth,d, belowground levelddiameterofloading plate. Plate bearing test also known as plate load test or static loading test, is an insitu load bearing test of soil. Plate load test and reference plate load test is a field test for determining the ultimate bearing capacity of soil and the likely settlement under a given load. Pdf evaluation of soil bearing capacity by plate load. Mar 18, 2015 the load intensity and settlement observation of the plate load test are plotted. Introduction plate load tests are important field tests for geotechnical engineering practice. Plate load test equipment, procedure, calculation civil. Nov 08, 2015 plate load test is a field test which is commonly adopted to determine the bearing capacity and settlement of soil under a given condition of loading. Pdf evaluation of soil bearing capacity by plate load test.
Pdf plate load test is the most reliable method for obtaining the coefficient of subgrade reaction and the modulus of deformation of a soil. The activity of plate bearing test is performed in order to determine the bearing capacity of soil underneath that is likely to take the anticipated load of temporary or a. Many times it happens that the area available for testing is very small so it very difficult to go for standard plate load test as it requires a large space. It gives information on the soil only to a depth equal to about two diameters of the bearing plate, and takes into account only part of. In the enter load test report details page, type a name for your report in report name. Then specimen for the direct shear test could be obtained using the correct cutter provided.
This method is useful to solve the design problems for subgrade and subbase layers, where application of high wheel loads is expected due to heavy traffic during construction and service life of the pavement. The results obtained by these tests are used with the empirical curves to determine the thickness of pavement and its component layers. Plate load test is one of the quick, direct and economic methods for soil bearing capacity determination. A normal load is applied to the specimen and the specimen is. In this test a square or circular rigid plate of standard dimension generally 300 mm2 for square or 300 mm dia for circular is placed at foundation level and load is applied in increments.
The plate bearing test or plate loading test is an insitu load bearing test of soil used for determining the ultimate bearing capacity of the ground and the likely settlement under a given load. The cbr test is one of the most commonly used methods to evaluate the strength of a sub grade soil, sub base, and base course material for design of thickness for highways and airfield pavement the california bearing ratio test is penetration test meant for the evaluation of subgrade strength of roads and pavements. Plate load test settlement of foundation soil mechanics. The plate test is particularly very useful in that it gives instant results on the field. The plate was placed on the ground surface before the 6 m of embankment was built. The accurate estimation of soil bearing capacity plays an important role in the design of a stable foundation for road pavement and airfields projects.
These tests were performed to verify adequate support for heavy lift cranes whose pads would bear on the exposed surface. Also sometimes it is not possible to provide the required. Pdf evaluation of soil bearing capacity by plate load test qasim. The plate load test basically consists of loading a steel plate placed at the foundation level and recording the settlements corresponding to each load increment. Making the assumption that the plate settlement is the same of an elastic halfspace, until the limit pressure is reached, the stressstrain modulus, es, can be expressed from results of a plate load test in terms of the ratio of bearing pressure to plate settlement, as stated in eq. Cyclic plate load test free download as powerpoint presentation. Astm d1194 94 standard test method for bearing capacity of.
Plate load test is a field test which is commonly adopted to determine the bearing capacity and settlement of soil under a given condition of loading. Immediately before starting a load test, verify that at least 1 in. Final report of the plate load test at ibn firnas housing complex project in altajeyat districtbaghdad technical report pdf available march 2015 with 5,760 reads how we measure reads. Static plate load tester supports the following standards. Plate load test is a field test, which is performed to determine the ultimate bearing capacity of soil and the probable settlement under a given load. If the test is performed in a test pit, width of the pit should be at least 4 to 5 times of plate diameter. Mackintosh probe test to be carried out at load test location center of plate at testing leve l before the test for calibration purpose. Plate load test is one of the quick, direct and economic methods for soil bearing capacity. The test results reflect only the character of the soil located within a depth of less than twice the width of the bearing plate. However, geotechnical engineers can be used the plate load test results for quick estimation of the 2 test programme and soil bearing capacity. This test is very popular for selection and design of shallow foundation.
Plate load testing is usually used for the verification of the bearing capacity of the land of the substrate, of the foundation layer and the base layer of the flooring, although it is not uncommon to its use to investigate the bearing capacity of the soil surface or to the state compaction of granular materials and road surfaces the load test consists in transmitting to the soil to be. Plate load test for calculation of bearing capacity and. Soil plate load test for load settlement, deformability. Pdf final report of the plate load test at ibn firnas. Plate load apparatus 1 bearing plate circular steel bearing plate, not less than 25 mm thickness, and cm2 area is used. Plate load test is done at site to determine the ultimate bearing capacity of soil and settlement of foundation under the loads for clayey and sandy soils. Alternatively, sand sample can be placed in a dry state at a required density, in the assembled shear box. Plate bearing tests for design of flexible and rigid pavements. Plate load test to calculate safe bearing capacity of soil.
Standard test method for nonrepetitive static plate load tests of soils and flexible pavement components, for use in evaluation and design of airport and highway pavements, astm, us. The report supplements previous papers on pavement design, particularly the study reported in 1952. So this test is called a plate load test on undisturbed soil sample. The static plate load test can be utilized in earthworks and foundation engineering, as well as road construction in order to determine load settlement lines and by this to evaluate the deformability and the load capacity of the soil. Plate load test is performed to determine the ultimate load bearing capacity of soil over the insitu conditions. The plate load test or plate bearing test is an insitu site investigation field test used to determine the ultimate bearing capacity of the ground and the likely settlement under a given load. In this video i have talked about the plate load test which is used to find the bearing capacity and the settlement of the foundation. Where the test load is applied directly to the pile by means of a loaded platform.
Yoder research engineer joint highway research project purdue university synopsis this paper presents the results of a study of pavement design based on the plate bearing list. The data used for this lab report was not gathered from the student run experiments, but rather from standardized testing performed by the laboratory professor, to ensure accurate and. Sep 27, 2018 plate bearing test also known as plate load test or static loading test, is an insitu load bearing test of soil. Report plate load test please fill this form, we will try to respond as soon as possible. Fullscale field tests were also conducted on several test lane sections built at the pavement research facility prf site using two types of loadings. Sep 04, 2018 plate load test is performed to determine the ultimate load bearing capacity of soil over the insitu conditions. The plate load test ax01 is the simple solution to determine the strain moduli ev2 and ev1 a figure for the bearing capacity and the ratio ev2ev1 a figure for the compaction level. So, plate load test is helpful for the selection and design the foundation. To calculate safe bearing capacity suitable factor of safety is applied. The plate load test permits the relationship between load and settlement.
It is designing for measuring static loads on spread footings e. Evaluation of bearing capacity from field and laboratory tests. Plate bearing tests for design of flexible and rigid pavements e. The method of performing plate load test is outlined in the below sketch fig. Feb 25, 2017 plate load bearing tests are used for many purposes. The cbr test can also be used to get the curve of the loadsettlement of the soil in the field which is more or less similar to the plate load test objective. Plate load bearing tests are used for many purposes. Create load test performance reports using microsoft excel. The activity of plate bearing test is performed in order to determine the bearing capacity of soil underneath that is likely to take the anticipated load of temporary or a permanent structure. In the select the runs for your report page, under select one or more runs to add to the report, select two load test results that you want to compare in the report and choose next. The plate load test pit should be at least 4 times as wide as the plate and to the foundation depth to be placed.
The test load is gradually increased till the plate starts to sink at a rapid rate. For performing this test, the plate is placed at the desired depth, then the load is applied gradually and the settlement. The california bearing ratio test is penetration test meant for the evaluation of subgrade strength of roads and pavements. Making the assumption that the plate settlement is the same of an elastic halfspace, until the limit pressure is reached, the stressstrain modulus, es, can be expressed from results of a plate load test in terms of the ratio of bearing pressure to plate settlement, as stated in. This is a field test which determines the coefficient of elastic uniform compression cu or modulus of subgrade reaction ks. Cbr test procedure california bearing ratio for road design.
Select the load test you want to generate the report for and choose next. This test gives the highest rate of accuracy determining the safe bearing capacity of soil in case of shallow foundations. Plate load test is a field test for determining the ultimate bearing capacity of soil and the likely settlement under a given load. The results obtained by these tests are used with the empirical curves to. Plate load test how it works measuring ev2 and ev1. Standard test method for repetitive static plate load. The results of a typical plate load test are shown in fig. Select test location and depth at the point where the real foundation will be constructed, if possible. Fullscale field tests were also conducted on several test lane sections built at the pavement research facility prf site using two types of. Pdf the plate load test is one of the most accepted and frequently used geotechnical field tests for shallow foundation and pavement design purposes find, read and cite all the research. The load test included in the standard is also used to find modulus subgrade reaction useful in the design of raft foundation and in the design of pavements. Pdf final report of the plate load test at ibn firnas housing. Plate load test results, geotechnical testing journal, gtjodj. S to perform the load tests and to prepare report of test results.
Plate bearing test plate load testing site testing. The plate load test is mandatory in case of designing foundation over the sandy and clayey soil. Strength and testing of materials engr211204 uploaded by. Din 1834, bs77 static plate load test can be utilized in earthworks and foundation engineering, as well as road construction in order to determine load settlement lines and by this to evaluate the deformability and the load capacity of the soil. Load increments are applied until the load intensity on the plate reach to 410. While site investigations for most projects consider ground conditions at depth, the strength and variability of the near surface ground is critical. Report plate load test please fill this form, we will try to respond as. Chulalongkorn university saraburi campus contractor. The modulus is an indicator for the bearing capacity of the soil or flexible pavement under the loading plate.