Equipment for measuring layered settlement of deep soft soil or blanket and setup method thereof

Abstract

The invention discloses a kind of equipment for measuring layered settlement of deep soft soil or a blanket and a setup method thereof. A settlement observation pipe is embedded in a drill hole; a guide rod is arranged in the settlement observation pipe; the equipment is characterized in that the guide rod is formed by the connection of a plurality of common guide rods and a stainless steel guide rod, wherein the stainless steel guide rod is adopted at the place wherein the layered settlement is to be measured; an anchoring head is mounted at the bottom of the guide rod; the anchoring head is in sealing connection with the guide rod; in the meantime, a section of the anchoring head is tightly connected with the settlement observation pipe; a guide rod sealing cap is mounted at the top of the guide rod; a line outgoing device is arranged on the sealing cap; a reed switch-resistance sensing element is arranged inside the stainless steel guide rod; data lines of the reed switch-resistance sensing element are collected to form a data cable before the line outgoing device at the top of the guide rod, and connected with an external electric signal receiving reading device through the leading of the line outgoing device; a magnetic ring is mounted in a sleeving manner at the place where the layered settlement is required to be measured out of the settlement observation pipe. The equipment for measuring the layered settlement of the deep soft soil or the blanket is simple in installation and measurement, and can realize automatic measurement.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering soft soil foundation engineering measurement and monitoring, and in particular relates to a measuring device for measuring layered settlement of deep soft soil or covering layer. The present invention also relates to a setting method of the device for measuring the layered settlement of deep soft soil or overburden layer. Background technique [0002] With the rapid development of social economy and the continuous deepening of reform and opening up, the development of national infrastructure construction is changing with each passing day. The number of highways, ports, docks and other buildings is increasing, and there are fewer and fewer natural excellent foundations that can be directly used without treatment. Buildings had to be built on deep, soft soils that were less stable. Deep soft soil has high moisture content, poor water permeability, high compressibility, and low strength. Unde...

AI Technical Summary

Problems solved by technology

This layered settlement measurement method requires a layered settlement reading instrument to be manually pulled up and down in the settlement tube, which is not only time-consuming and laborious, but also has a large manual reading error, and it cannot realize automatic measurement.

[0005] In the past, hydraulic settlement meters were generally used to monitor the settlement of the dam foundation covering layer, but it is difficult to install the instrument by drilling. The hydraulic settlement meter is used to monitor the settlement of the dam foundation covering layer only for monitoring the total settlement of the covering layer, and because the hydraulic settlement meter passes through The pipeline system leading to the back of the dam transmits liquid pressure, which often leads to unsatisfactory liquid pressure transmission due to pipeline problems, which affects measurement accuracy and thus affects the reliability of monitoring results

With the development of dam construction technology on the covering layer, it is urgent to monitor the total settlement and layered settlement of the covering layer of the dam foundation to ensure the safety of the dam and its foundation on the covering layer. Settlement pipes are installed in the holes, and along with the dam filling, the settlement pipes are extended section by section through the dam body to the layered settlement measurement method of the dam surface. In addition to the above-mentioned "traditional measurement method for layered settlement of deep soft soil foundation", the settlement pipe is extended to the surface of the dam body along with the filling of the dam body, which not only interferes greatly with the dam filling construction, but also is difficult to protect and is easy It leads to the destruction of the settling tube, so that the measurement method of layered settlement adopted by it completely fails; while the beam-type electric sedimentation instrument monitors the layered settlement of the overburden layer requires multiple sets of instruments, the cost of the instrument is high, and its installation and protection are difficult. It is easy to cause the installed beam type electric sedimentation instrument to fail to work normally

At present, the monitoring results of the layered settlement of the dam's deep overburden layer foundation are basically in a blank state. According to the measured data, the total settlement and layered settlement of the dam foundation overburden layer are analyzed to evaluate the safety of the dam and its deep overburden layer dam foundation and to study the dam foundation of the deep overburden layer. The working characteristics cannot be implemented, and there is an urgent need to develop instruments and equipment that can be used for monitoring the layered subsidence of the dam's deep overburden layer

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