Surface settlement measuring method and observation device thereof

Abstract

The invention relates to a surface settlement measurement method and an observation device thereof, the observation device comprises a settlement device and a receiving device, a laser control module is installed at the position, close to the top, of the settlement device, and laser emitted by the laser control module irradiates a receiving panel of the receiving device; when the sedimentation device inclines, the compensation device is used for adjusting, and measured data are corrected; according to the invention, the measurement precision is improved while the measurement efficiency is improved.

Description

technical field [0001] The invention relates to a method for measuring surface settlement and an observation device thereof, belonging to the field of soft soil foundation treatment. Background technique [0002] Since the beginning of the 21st century, domestic infrastructure construction has developed vigorously, and the problem of land supply has become increasingly prominent. More and more infrastructure needs to be built on natural soft soil foundations. Due to the characteristics of high compressibility, low permeability and low strength of soft soil, building buildings directly on it will cause large settlement and uneven settlement, which will affect the normal use of the building, so it is necessary to deal with the soft soil foundation . [0003] In the method of soft soil foundation treatment, vacuum preloading is widely used because of its advantages of short construction period, strong applicability and good economy. However, in order to ensure construction sa...

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Problems solved by technology

[0004] In the traditional surface settlement observation process, people use measuring instruments outside the cofferdam to observe the settlement device inside the cofferdam (with a ruler on the rod), which requires professional measuring technicians. The tool used to measure the elevation) is used for measurement, and the assistance of another person is needed during the measurement process; secondly, generally speaking, the area of ​​soft soil foundation treatment is relatively large, in order to measure the elevation of the settlement observation point, the technician must inevitably set up Rotation point (for transferring elevation), the setting of the rotation point increases the survey work on the one hand, and reduces the accuracy of the measurement on the other hand; in addition, the larger the area of ​​the survey area, the more settlement observation points will be. More importantly, The distance between the station and the settlement observation point will also increase, and the optimal observation distance for leveling is about 40m. However, the soft soil treatment area is less than tens of thousands of square meters and more than hundreds of thousands of square meters. The observation distance of leveling measurement is far It is much larger than 40m, so it is necessary to set up a transfer station during the actual measurement, and sometimes the transfer station must be installed inside the cofferdam. For vacuum combined surcharge preloading (water surcharge) observers must go down into the water to perform the test. measurement, which brings great difficulty to the implementation of the measurement, and the settlement point that is too far away cannot be observed at all

[0005] During the vacuum preloading process, it is also easy to tilt the settlement device due to the uneven settlement of the soft soil inside the yard, resulting in errors in the traditional actual measurement process

[0006] Finally, the traditional field measurement often adopts the method of sticking a ruler on the settlement scale. The measurement work is greatly affected by the outside world, such as insufficient light. It is very difficult, and field measurement cannot be carried out in rainy days or at night

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