How to calculate the geosynthetic material drawing instrument? Geosynthetics puller calculation: Calculate the interface pull friction strength as follows: (17.5.1) Τp - drawing frictional strength, kPa; Tp - measured peak level total pull, kN; L, B - the length and width of the specimen buried inside the soil, m. 17.5.2 Calculate the drawing friction strength under normal pressure at each level and plot the τp~p curve. 17.5.3 Calculate the drawing friction coefficient f of soil-geosynthetic materials by the following formula: f=τp/p (17.5.3) Where p - normal pressure, kPa; Τp - Corresponding to the tensile friction strength of σ, kPa. experiment method: 2, Each group of tests should be no less than 3 samples. 3, The end of the sample taken from the test chamber shall be reinforced, and the sample outside the box shall not be greatly deformed during the test. 4, According to the density and state of the design requirements, the soil in the lower part of the test box is carefully filled, and the filling height is flush with the seam and the soil surface is leveled. 5, The sample is laid on the soil surface, and the tensile end is taken out from the slit. Note that the two sides are symmetrical, and then a layer of soil is gently laid on the sample to position the sample. 6, Fill the soil in the upper half of the box according to the density and condition required by the design. 7, The end of the sample is placed flat into the tension clamp, centered and evenly clamped. 8, Put the top cover and the dial indicator in turn, apply the normal pressure, and the time required for consolidation can be referred to. Related The test procedure is specified. 9, Adjust the horizontal loading device, Press the LCD display Chinese display. The test parameters required for the test are performed in sequence. Start the test. The up and down arrow keys are used to adjust the desired position of the fixture. The pull start point is when the tension clamp begins to be stressed. Press the start button , reading and recording the displacement and horizontal tension. The drawing rate can be referred to the working test procedure, and it is preferable to take 0.5 mm/min for the sandy soil. 10. When the pull-out force peaks, continue drawing until the pull-out force is stable, and the test can be stopped. 11, Change one piece and apply another normal pressure, repeat this section the above The steps complete all the tests. Twinkle System Technology Co Ltd , https://www.pickingbylight.com
Cut the specimen according to the provisions. The width of the specimen should be slightly smaller than the width of the test chamber. The length of the specimen should be such that the specimen is not broken and determined by the test.