Experimental device and test method for research on deformation characteristics of micro piles made of crushed rock and soil
A technology for researching and testing gravel soil, which is applied in the field of research and testing devices for the deformation characteristics of micro piles made of gravel soil. It can solve the problems of constraints and inability to monitor the deformation characteristics of boreholes, and achieve the effect of convenient movement.
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Embodiment 1
[0059] Use gravel soil similar materials 141 to compact and fill the cavity 14 in layers, the diameter of the selected micro pile hole 15 is 44mm, and the earth pressure cell 151 is arranged along the 20mm around the hole wall, and the strain gauge 152 and the deep displacement sensor are arranged along the hole wall 30mm 153, install a pore water pressure gauge 154 along the seepage direction at a distance of 50 mm from the hole wall and 100 mm from the bottom of the hole, and arrange a settlement monitoring sensor 156 on the surface of the gravel soil similar material 141 along the hole wall 20 mm, turn on the data acquisition instrument 157, and do not apply groundwater seepage , mobile drilling rig platform support 31, ready for test;
[0060] The data of each sensor in embodiment 1 is collected, which can be used to analyze the stress and strain, deep displacement, and settlement / uplift of the micro pile hole 15 in different times of 44mm drilling; Figure 11 It is the de...
Embodiment 2
[0062] Use gravel and soil similar materials 141 to compact and fill the chamber 14 in layers, the diameters of the selected micro pile holes 15 are 32mm, 44mm, and 56mm, and the earth pressure cells 151 are arranged along the 20mm around the hole wall, and the strain gauges 152 are arranged along the 30mm of the hole wall 1. Deep displacement sensor 153, pore water pressure gauge 154 is arranged at a distance of 50 mm from the hole wall along the seepage direction, and 100 mm from the bottom of the hole, and a settlement monitoring sensor 156 is arranged on the surface of gravel soil similar material 141 along the hole wall 20 mm, and the data acquisition instrument 157 is turned on. No groundwater seepage is applied, and the rig platform support 31 is moved in preparation for the test.
[0063] The data of each sensor in embodiment 2 is collected, which can be used to analyze the variation of stress and strain, deep displacement, settlement / uplift of different borehole diamet...
Embodiment 3
[0065] Use gravel and soil similar materials 141 to compact and fill the cavity 14 in layers, the diameter of the selected micro pile hole 15 is 56mm, and the earth pressure cell 151 is arranged along the 20mm around the hole wall, and the strain gauge 152 and the deep displacement sensor are arranged along the hole wall 30mm 153, lay pore water pressure gauge 154 and water content sensor 155 along the seepage direction 50mm away from the hole wall and 100mm away from the hole bottom, lay out a settlement monitoring sensor 156 along the hole wall 20mm on the surface of gravel soil similar material 141, and turn on the data acquisition instrument 157 ; Open the water inlet pipe valve 2134 to enter water through the water inlet pipe 2133, and open the high water head pipe valve 2136 corresponding to the high water head nozzle 2132 at the 400mm place and the 800mm place respectively, when the water reaches the low water head nozzle 2241 at the 50mm place, open the corresponding Lo...
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