Measuring method for monitoring soil mass layered settlement
A technology of soil stratification and measurement method, which is applied in the field of foundation soil survey, construction, infrastructure engineering, etc. Effect
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[0013] Example 1, a measurement method for monitoring the layered settlement of the soil. Drill holes on the foundation to be measured. The drilled holes are generally deeper than the installation depth. The principle is 10 meters + 0.5 meters, 20 meters + 1 meter. , And so on. After drilling to a predetermined depth, use clear water to change the slurry, and after the slurry change, the required measuring hole 3 is formed by lifting the drill. Then backfill 20-40cm thick cement mortar to the bottom of the measuring hole 3, preferably 30cm thick cement mortar, and then put the closed sedimentation tube 1 into the measuring hole 3, and insert the bottom end into the cement mortar to settle The bottom end of the pipe 1 is closed to prevent clogging by mud and sand. When installing the settling pipe 1, if the buoyancy of the pipe is too large, you can inject clean water into the settling pipe 1 while lowering the pipe.
[0014] There are several sections of corrosion-resistant sta...
Example Embodiment
[0019] Example 2, reference figure 2 In the measurement method for monitoring the layered settlement of soil described in embodiment 1, the fiber grating displacement meter 7 includes a fiber grating displacement meter body 11 and a tie rod 10. The fiber grating displacement meter body 11 is fixed on the settlement measuring tube 6 At the top, the lower end of the fiber grating displacement meter body 11 is provided with a sleeve 8 sleeved outside the pull rod 10. The pull rod 10 slides in the sleeve 8. The inner wall of the sleeve is provided with two upper and lower ring grooves that cooperate with the pull rod 10. The groove is equipped with a corrosion-resistant O-ring 9 to prevent corrosive liquid from entering the displacement gauge through the sliding of the rod 10 to corrode the grating.
Example Embodiment
[0020] In Embodiment 3, in the measurement method for monitoring the layered settlement of the soil described in Embodiments 1 and 2, the outer surface of the fiber grating displacement meter body 11 and the tie rod 10 are both provided with an anticorrosive coating. Part of the fiber grating displacement meter 7 should be sealed with glass glue.
[0021] The present invention utilizes the current advanced fiber grating sensing technology, has strong measurement anti-interference ability, high measurement accuracy (measurement accuracy can reach 0.03mm), high data acquisition frequency (acquisition frequency can reach 100 Hz), and reduces manual measurement to the greatest extent Operation, reducing errors caused by human operation, and easy to realize automatic monitoring and safety early warning.
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