CN-121994191-A - Ground surface subsidence monitoring method based on serial hydrostatic level

Abstract

The invention relates to a ground surface subsidence monitoring method based on serial hydrostatic leveling instrument, which comprises the steps of determining a datum point and a monitoring point, fixing the hydrostatic leveling instrument on an auxiliary upright post by using an anchor ear connecting piece, deploying the auxiliary upright post on the datum point and the monitoring point, connecting all the hydrostatic leveling instruments in series by using a liquid communicating pipe, pouring antifreeze liquid into the liquid communicating pipe, communicating all the airtight openings of all the hydrostatic leveling instruments by using an airtight pipe, connecting all the hydrostatic leveling instruments into a data acquisition instrument by using a shielding cable, sending liquid level readings of the hydrostatic leveling instruments of all the measuring points to the data acquisition instrument, calculating liquid level variation, and further calculating the subsidence of all the measuring points. According to the invention, the auxiliary upright post and the hoop connecting piece are adopted to install the hydrostatic level on the ground surface, so that the up-and-down adjustment amplitude of the hydrostatic level during installation is improved, and the hydrostatic level monitoring method can be applied to more complex ground surface subsidence monitoring.

Inventors

• Shi Pixu
• LV WENJUN
• Xu Xiaozuo
• WANG WENFEI
• CHEN ZHONGQIAO
• LIN AIJUN
• Tang weiyao
• YUAN XINQIANG
• LIU ZICHEN

Assignees

• 中铁第一勘察设计院集团有限公司

Dates

Publication Date

20260508

Application Date

20251128

Claims (10)

1. 1. The earth surface subsidence monitoring method based on the serial hydrostatic level is characterized in that: The method comprises the following steps: Determining the positions of measuring points, including a datum point and a monitoring point; Fixing a hydrostatic level (11) to the auxiliary column using a hoop connector and deploying the auxiliary column to the datum point and the monitoring point; All hydrostatic levels (11) are connected in series through a liquid communicating pipe (15) and are poured into antifreeze liquid, and airtight openings of all hydrostatic levels (11) are communicated through an airtight pipe (14); All hydrostatic level gauges (11) are connected into a data acquisition instrument through a shielding cable (13); the liquid level reading of each measuring point hydrostatic level gauge (11) is sent to a data acquisition instrument, the liquid level variation is calculated, and the settlement of each measuring point is further calculated.
2. 2. The tandem hydrostatic level-based surface subsidence monitoring method of claim 1, wherein: The auxiliary upright post comprises an auxiliary upright post base (2) and an auxiliary upright post main body (1) at the top of the auxiliary upright post base, wherein the auxiliary upright post base (2) is fixed to the ground of a measuring point or a concrete foundation or a concrete base embedded in the position of the measuring point through an expansion screw.
3. 3. The tandem hydrostatic level-based surface subsidence monitoring method of claim 2, wherein: The hoop connecting piece comprises a hoop connecting piece mounting platform (4), a hoop connecting piece supporting rod (5), a lower hoop piece (6) and an upper hoop piece (7); The upper hoop (7) and the lower hoop (6) are arranged up and down and are used for hooping the auxiliary upright post main body (1); The anchor ear connecting piece mounting platform (4) is connected to the side of going up anchor ear spare (7), and anchor ear connecting piece bracing piece (5) slant is connected between the tip and the lower anchor ear spare (6) of anchor ear connecting piece mounting platform (4).
4. 4. A tandem hydrostatic level-based earth's surface subsidence monitoring method as set forth in claim 3, wherein: the upper hoop (7) is in a semicircular tube shape, connecting plates are arranged at two ends of the upper hoop, and the upper hoop is fixed to the end part of the hoop connecting piece mounting platform (4) through hoop connecting piece fixing screws (8).
5. 5. The tandem hydrostatic level-based surface subsidence monitoring method of claim 4, wherein: the lower hoop member (6) comprises two semicircular tubes, one side of the lower hoop member is connected with the supporting rod (5) of the hoop connecting member through bolts, and the other side of the lower hoop member is connected with the supporting rod of the hoop connecting member through bolts.
6. 6. The tandem hydrostatic level-based surface subsidence monitoring method of claim 5, wherein: The height of the hydrostatic level is adjusted through the hoop connecting piece, so that all the hydrostatic levels are ensured to be positioned on the same horizontal plane.
7. 7. The tandem hydrostatic level-based surface subsidence monitoring method of claim 6, wherein: The liquid communicating pipe (15), the airtight pipe (14) and the shielding cable (13) are wrapped in the heat preservation cotton (16).
8. 8. The tandem hydrostatic level-based surface subsidence monitoring method of claim 7, wherein: Calculating a hydrostatic level change Δhj of the reference point, comprising: △hj=Kj(Fj-Foj); Wherein: Kj is the hydrostatic level reference point sensor coefficient; fj is the current reading of the hydrostatic level datum point; Foj is the initial reading of the hydrostatic level datum point.
9. 9. The tandem hydrostatic level-based surface subsidence monitoring method of claim 8, wherein: Calculating the liquid level change delta hj of the hydrostatic level at the monitoring point, comprising: △hi=Ki(Fi-Foi); Wherein: ki is the hydrostatic level gauge monitoring point sensor coefficient; fi is the current reading of the hydrostatic level monitoring point; foi is the initial reading of the hydrostatic level monitoring point.
10. 10. The tandem hydrostatic level-based surface subsidence monitoring method of claim 9, wherein: calculating the settlement quantity delta Hi of each measuring point, comprising: △Hi=△hj-△hi=Kj(Fj-Foj)-Ki(Fi-Foi)。

Description

Ground surface subsidence monitoring method based on serial hydrostatic level Technical Field The invention relates to the technical field of ground surface subsidence monitoring, in particular to a ground surface subsidence monitoring method based on a serial hydrostatic level. Background The hydrostatic level is an instrument which uses the principle of a communicating vessel, is connected with each hydrostatic level through a liquid communicating pipe and measures the liquid level change in the hydrostatic level so as to calculate the sedimentation change value of each measuring point. The static leveling instrument is generally composed of two or more observation devices which are communicated with each other, the quantity of the static leveling instrument depends on the use requirement, and the adopted static leveling instrument for settlement observation and earth surface settlement monitoring of a large-scale structure often needs more than ten, even more than ten, to be communicated with each other. If the system is used for settlement monitoring of dams, high-rise buildings, mines, landslide, bridges and the like, the static leveling system is generally arranged on a measuring pier with the same height as a measured object or on the same height line of a wall of the measured object, an integrated modularized automatic measuring unit is used for collecting data, and the system is connected with a computer through wired or wireless communication, so that automatic monitoring is realized. However, in the current stage, the hydrostatic level is directly installed on the surface of the monitored object by adopting a bracket, and for the less flat ground surface subsidence monitoring, the hydrostatic level cannot be guaranteed to be installed on the same horizontal plane. Particularly, the earth surface subsidence monitoring is performed near business lines, such as earth surface subsidence between two existing railways, earth surface subsidence at the periphery of a protective fence and the like, vegetation in the areas often flourishes and the earth surface has certain fluctuation, and the earth surface subsidence monitoring is difficult to realize by adopting a traditional hydrostatic level installation method. Therefore, there is a need to propose new measures to overcome the above drawbacks. Disclosure of Invention The invention aims to provide a ground surface subsidence monitoring method based on a serial hydrostatic level, which aims to solve the problem of reasonable installation of the hydrostatic level in special areas such as luxuriant vegetation, surface relief and the like. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: providing a tandem hydrostatic level based surface subsidence monitoring method, the method comprising: Determining the positions of measuring points, including a datum point and a monitoring point; fixing the hydrostatic level to the auxiliary column with a hoop connector, and deploying the auxiliary column to the datum point and the monitoring point; All hydrostatic leveling instruments are connected in series through a liquid communicating pipe and are poured into antifreeze, and airtight openings of all hydrostatic leveling instruments are communicated through an airtight pipe; all hydrostatic level gauges are connected into a data acquisition instrument through a shielding cable; The liquid level reading of each measuring point hydrostatic level is sent to a data acquisition instrument, the liquid level variation is calculated, and the settlement of each measuring point is further calculated. Further, the auxiliary upright post comprises an auxiliary upright post base and an auxiliary upright post main body at the top of the auxiliary upright post base, wherein the auxiliary upright post base is fixed to the ground of a measuring point or a concrete foundation or a concrete base embedded in the position of the measuring point through expansion screws. Further, the hoop connecting piece comprises a hoop connecting piece mounting platform, a hoop connecting piece supporting rod, a lower hoop piece and an upper hoop piece; The upper hoop piece and the lower hoop piece are arranged up and down and are used for hooping the auxiliary upright post main body; the anchor ear connecting piece mounting platform is connected to the side of last anchor ear spare, and anchor ear connecting piece bracing piece slant is connected between anchor ear connecting piece mounting platform's tip and lower anchor ear spare. Further, the upper hoop member is in a semicircular tube shape, connecting plates are arranged at two ends of the upper hoop member, and the upper hoop member is fixed to the end part of the hoop connecting member mounting platform through hoop connecting member fixing screws. Further, the lower hoop member comprises two semicircular tubes, one side of which is connected by a bolt, the other side is connected with the anc