Large direct shear test sample preparation device for microorganism reinforced coarse-grained soil and use method thereof
A technology of microorganisms and coarse-grained soils, which is used in measuring devices, preparation of samples for testing, and testing the strength of materials by applying a stable shear force. Reinforcement degree evaluation, reinforcement design deviation and other issues, to achieve the effect of convenient assembly and separation, good uniformity and integrity, and ensure integrity
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Embodiment 1
[0047]This embodiment discloses a large-scale direct shear test sample preparation device for microbial reinforcement of coarse-grained soil, including a device base 1, a sample base 2, a mold cylinder 3, a casing 6, a grouting pipe 7, a bending element sensor 8, a peristaltic A pump 10, a microbial solution pool 11 and a reaction liquid pool 12.
[0048] see figure 1 , the specification of the device base 1 is the same as that of the direct shear instrument base, and the device base 1 is fixed by bolts. A sample holder base 2 is installed on the base 1 of the device, and a mold cylinder 3 is installed on the sample holder base 2 . The mold barrel 3 is a cylinder with an open upper end and a hollow interior, and the cylinder is formed by splicing two split molds 301 . The inside of the mold cylinder 3 is filled with coarse-grained soil 5 , and the vibrator 18 vibrates the coarse-grained soil 5 in layers. see Image 6 , is a schematic diagram of the vibrator 18.
[0049] s...
Embodiment 2
[0060] The using method of the large-scale direct shear test sample preparation device based on a kind of microbial reinforcement coarse-grained soil described in embodiment 1 may further comprise the steps:
[0061] 1) The original base of the direct shear instrument is removed, the device base 1 is fixed on the direct shear instrument by bolts, and the sample holder base 2 is installed on the device base 1 .
[0062] 2) The two split molds 301 are fixed on the sample base 2 by M6 bolts, and the fixing plates 3011 on the two split molds 301 are connected by bolts and then sealed with a sealant to complete the assembly of the mold cylinder 3 .
[0063] 3) Place the three sleeves 6 vertically at predetermined positions in the mold cylinder 3, prepare coarse-grained soil 5 according to the predetermined gradation and mix them evenly, and put them into layers between the sleeves 6 and the mold cylinder 3, each layer The soil sample is compacted with a vibrator 18, and the surface...
Embodiment 3
[0076] This embodiment discloses a large-scale direct shear test sample preparation device for microbial reinforcement of coarse-grained soil, including a device base 1, a sample base 2, a mold cylinder 3, a casing 6, a grouting pipe 7, a bending element sensor 8, a peristaltic A pump 10, a microbial solution pool 11 and a reaction liquid pool 12.
[0077] see figure 1 , the device base 1 is installed on the direct shear instrument, the device base 1 is installed with a sample base 2, and the sample base 2 is equipped with a mold cylinder 3. see figure 2 , the outer wall of the mold cylinder 3 is provided with a number of bending element sensors 8, and the lower end of the mold cylinder 3 is provided with a number of drain pipes 4 penetrating through its side wall.
[0078] see figure 1 Or 2, the inside of the mold cylinder 3 is provided with several sleeves 6 vertically, the upper end of the sleeve 6 is open, and the lower end is closed, and the tube wall of the sleeve 6 ...
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