CN2475994Y

CN2475994Y - Guide measuring sign post device for monitoring ground subsidence

Info

Publication number: CN2475994Y
Application number: CN 01239455
Authority: CN
Inventors: 顾为栋; 万贵富; 蒋家正
Original assignee: SHANGHAI INSTITUTE OF GEOLOGICAL SURVEY
Current assignee: SHANGHAI INSTITUTE OF GEOLOGICAL SURVEY
Priority date: 2001-05-21
Filing date: 2001-05-21
Publication date: 2002-02-06
Anticipated expiration: 2011-05-21

Abstract

A monitoring the ground settlement cited measuring frequency mark body, comprises of at least two grades cited measuring benchmarking, the cited measuring benchmarking has a structure form of pagoda which is finer upper and coarser under, and resettled in the metal protective tube, the length of each grade is :A<n>=5/9.(4/9)<n-1>.L. Among them, n is the grade of the cited measuring benchmarking, L is the whole length of the cited measuring frequency mark. The benchmarking is slide connected with the inner side of the metal protective tube by the centralizer. The bedrock bench mark and the layered bench mark made of the said benchmark structure can increase the stability, the operation quality and service life effectively and provide very high reliability monitoring data for the real-time monitoring of the ground settlement and prevention and governance of the geological disasters.

Description

A kind of Monitoring Surface Subsidence draw the mark body

The utility model belongs to a kind of Ground Subsidence Monitoring facility, and particularly a kind of being used in Geotechnical Engineering, Surveying Engineering, hazards control drawn the mark body as base-rock marker, layering target in measurement of higher degree benchmark, the soil layer deformation monitoring facility.

Base-rock marker layering mark all is bench marks that land subsidence is measured.Base-rock marker is to be embedded in the measuring basis of stablizing in the basement rock body; The layering mark is the survey mark that is embedded in the different depth formation beds.By to base-rock marker and the translocation of layering target, can reflect the distortion of soil layer.At present, in the measurement of the level standard and standard of country and industry, only there is pair design of base-rock marker exposed area basement rock level mark that concrete technical requirement is arranged, and the buried district of base-rock marker is not had special mark body structure design.It is so same that layering mark mark body does not have formation yet.In the prior art, base-rock marker adopts cable type mostly, promptly penetrates wire rope in drawing the mark body, makes the mark body keep vertical, the bigger limitation of year existence of its stability of structure and use by the stretching wire rope.The base-rock marker and the layering mark that also have other shape to establish normally adopt identical caliber pipe material to do to draw the mark body, though be easy to construction, stability is not high with reliability, easily the precision of influence monitoring.

The purpose of this utility model is to overcome existing defective in the prior art, what a kind of Monitoring Surface Subsidence was provided draws the mark body, make it can improve base-rock marker stability and layering target flexibility and reliability, and improve base-rock marker, layering mark better as the operating accuracy of measuring bench mark.

In order to achieve the above object; the utility model has adopted following technical scheme: a kind of Monitoring Surface Subsidence draw the mark body; drawing the mark bar by two-stage is at least constituted; this draws the mark bar is up-thin-low-thick pyramid-like structure form; and be placed in the protection metal pipe, it is characterized in that: this draws mark bar every level length from bottom to top and is:

A _n＝5/9·(4/9) ^n－1·L

Wherein: n is the progression sequence number of drawing the mark bar, (sequence number increases progressively from lower to upper, n=1, and 2,3 ...)

L is the entire length of drawing the mark body;

And this draws the mark bar and is by the centralizer of fixedlying connected with it and metal coating inside pipe wall and is slidingly connected.

Adopt made base-rock marker of the utility model mark body structure and layering mark, stability, running quality and the serviceable life that can improve the mark body effectively.As measuring bench mark, base-rock marker can embody the effect of observed quantity benchmark more accurately, the layering mark can reflect upper strata distortion situation more accurately, in the millimetre-sized measuring accuracy of one of percentage, objective reality ground reflects upper strata practical distortion amount, and the Monitoring Data of the very high confidence level of tool is provided for land subsidence is monitored in real time, geologic hazard strick precaution improvement etc.

The utility model will be further described below in conjunction with accompanying drawing and embodiment

Fig. 1 is made into the structural representation of base-rock marker for the utility model;

Fig. 2 is made into layering target structural representation for the utility model;

Fig. 3 is the structural representation of the utility model centralizer;

Fig. 4 is the utility model centralizer part sectioned view.

With reference to Fig. 1, Fig. 2, the utility model draws the mark bar by two-stage at least and is constituted, and this draws the mark bar is up-thin-low-thick pyramid-like structure form, and is placed in the protection metal pipe 8.The upper end of this protection metal pipe 8 is equipped with sealing copper band 3, and the principal mark head 1 of mark post and secondary header 2 stretch out the outer end of sealing copper band 3.

Drawing the mark bar is up-thin-low-thick pyramid-like structure form, and the connection length of different bore mark posts has determined that 95 cut apart principle, promptly below the thickest part mark post length be 5/9 of mark post length overall, inferior thick mark post length is 5/9 of remaining mark post, the rest may be inferred by analogy.Further,

The described mark bar every level length from bottom to top that draws described in the utility model is:

A _n＝5/9·(4/9) ^n－1·L

Wherein: n is the progression that draws the mark bar, sequence number, (sequence number increases progressively from lower to upper, n=1, and 2,3 ...)

L is the entire length of drawing the mark body.

For example: the length of 3rd level Φ 89 mark posts 6 of present embodiment is among Fig. 1:

A ₃＝5/9·(4/9) ^3－1·L

＝80/729·L

The length of the 5th grade of Φ 73 mark posts 5 is:

A ₅＝5/9·(4/9) ^5－1·L

＝1280/59049·L

The length of the 6th grade of Φ 42 mark posts 4 is:

A ₆＝5/9·(4/9) ^6－1·L

＝5120/504441·L

Above-mentioned each two adjacent mark bar that draw that link to each other up and down all are fixedly connected by drawing internal and external threads on the mark bar.In addition, respectively draw the mark bar and be by centralizer of fixedlying connected 7 and protection metal pipe 8 inwalls and be slidingly connected, like this, can guarantee to draw the mark bar and in protection tube 8, keep vertical with it.

Please refer to Fig. 3 and Fig. 4, described centralizer 7 comprises two close-fitting annulus 7.1,7.2, wherein in annulus 7.2 with draw the mark bar and fixedly connected, can match according to different mark post calibers; The outside of outer toroid 7.1 is put two at least roller 7.4.Present embodiment is equally distributed three rollers.This roller 7.4 is connected with rolling wheel support 7.3 on outer toroid 7.1 outsides with axle 7.5 by bearing 7.6.

Claims

1, a kind of Monitoring Surface Subsidence draw the mark body, draw the mark bar by two-stage at least and constituted, this draws the mark bar is up-thin-low-thick pyramid-like structure form, and is placed in the protection metal pipe, it is characterized in that: this draws mark bar every level length from bottom to top and is:

A＝5/9·(4/9) ^n－1·L

Wherein: n is the progression that draws the mark bar, and L is the entire length of drawing the mark body;

2, Monitoring Surface Subsidence according to claim 1 draw the mark body, it is characterized in that: linking to each other two up and down, adjacent to draw the mark bar fixedly connected by screw thread.

3, Monitoring Surface Subsidence according to claim 1 draw the mark body, it is characterized in that: described centralizer comprises two close-fitting annulus, wherein in annulus with draw the mark bar and fixedly connected, the outside of outer toroid is put two at least roller.

4, Monitoring Surface Subsidence according to claim 3 draw the mark body, it is characterized in that: the roller on the centralizer outer toroid is connected by the rolling wheel support on outside bearing and axle and the outer toroid.