CN203023751U - Multifunctional forced centering foot stool - Google Patents
Multifunctional forced centering foot stool Download PDFInfo
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- CN203023751U CN203023751U CN 201220750778 CN201220750778U CN203023751U CN 203023751 U CN203023751 U CN 203023751U CN 201220750778 CN201220750778 CN 201220750778 CN 201220750778 U CN201220750778 U CN 201220750778U CN 203023751 U CN203023751 U CN 203023751U
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- centering
- center hole
- foot rest
- rod
- fine tuning
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Abstract
The utility model discloses a multifunctional forced centering foot stool comprising a centering disc, a supporting assembly and a fixed assembly, wherein the centering disc is provided with a center hole and the center hole is internally provided with a centering cylinder; a protecting bush is embedded between the centering cylinder and the center hole; the bottom of the centering cylinder is provided with a connection piece; the axiality tolerance of the centering cylinder and the center hole is +/-0.01mm; the supporting assembly comprises three foot stool rod pieces; each foot stool rod piece comprises a connection rod, a fine tuning structure and a retractable rod, which are connected from top to bottom; each fine tuning structure is formed by a fine tuning screw and locking nuts at the two ends of the fine tuning spiral; the fixed assembly is formed by a fixed platform and a tapered screw ground pile; the upper end of each connection rod is hinged with the centering disc; and the lower end of each retractable rod is hinged with the fixed platform. The multifunctional forced centering foot stool disclosed by the utility model has the characteristics of high centering precision, convenience in installation, good stability, fast measurement speed, capability of being repeatedly utilized and the like. The multifunctional forced centering foot stool can be widely applied to precision engineering measurement, foundation monitoring, side slope monitoring, special engineering monitoring and the like.
Description
Technical field
The utility model relates to a kind of support of instrument of surveying and mapping, relates in particular to a kind of device for the instrument of surveying and mapping forced centering.
Background technique
Along with the quickening of Urbanization in China and the raising of building level, the engineerings such as high level, skyscraper, large-scale stadium, steel structure, deep basal pit are more and more.And the building floor height is more and more higher, the stadiums structure becomes increasingly complex, the steel structure span is increasing, foundation ditch is more and more darker, and this has proposed new challenge just for traditional engineering survey and engineering monitoring.How in above-mentioned engineering promptly and accurately, fast and reliable to measure and monitor be a difficult problem of pendulum in face of the surveying work person.In order to reach corresponding measuring accuracy, under the prerequisite of using high precision measuring instrument, high-caliber survey crew, adopt more accurate method of measurement and supplementary equipment essential.
Traditional surveying work is generally used common foot rest, utilizes plumb bob, optical plummet or laser centring device with surveying instrument center and control point centrally aligned.Common foot rest possesses quick, the easy characteristics in station of establishing.In above-mentioned several centering mode, the plumb bob accuracy of alignment is lower, can only be used for low-grade measurement.And optical plummet and laser centring device, because having axial system error with surveying instrument, the accuracy of alignment of centralizer also is difficult to meet the demands in high-acruracy survey.Therefore, when carrying out the high-precision deformation measurement, because its required precision is high especially, when adopting plumb bob centering, optics centering or laser alignment, error of centralization can produce significant the impact in global error, respective specified is also arranged in existing specifications of surveys, and high-acruracy survey should be used forced centering apparatus.
Common forced centering observation procedure is in whole observation process, sets up the observation pier, buries forced centering apparatus underground on observation pier platform, during observation directly equipment placement on forced centering apparatus.The observation pier is generally used pouring concrete, need standing a period of time after observation pier casting complete, could use after it is stable, can not satisfy construction period in a lot of situations, and can not reuse, also need there be civil engineering unit to coordinate during cast concrete, affects to a great extent the progress of monitoring.The major works that needs long-term observation during runing, as dam, bridge, massive water projects etc., the general concrete observation pier that adopts with forced centering apparatus.
And in the measure the items that required precision is higher, measuring period is shorter such as construction location survey, pit retaining monitoring, often lack design and the preparatory work of measurement scheme due to early stage, professional unit of measurement often occurs just entrusting when construction unit or general contracting unit are badly in need of measuring.Concreting observation this moment pier often can not satisfy the measuring accuracy requirement, because concrete observation pier needs standing a period of time just can reach stable.Concrete observation pier depends on stable period engineering geological condition generally can not satisfy the requirement of engineering construction progress.
, complex structure medium-and-large-sized in the city and deep-foundation pit engineering often are near intensive existing building, road and bridge, underground utility, subway tunnel or civil air defense constructions and installations.In excavation of foundation pit and main structure construction process, Security, the stability of the Location accuracy of construction survey, the distortion of deep foundation pit supporting structure system, neighbouring building and road piping seem particularly important.If deal with improperly, not only will jeopardize the safety of engineering own, and can bring disaster to construction of structures, road and bridge and the various underground installation that closes on, bring about great losses.System, comprehensive, high-precision construction survey and monitoring provide sound assurance can for the safety of engineering.
The model utility content
In order to overcome the deficiency of existing tripod in high-acruracy survey work, the utility model provides a kind of Multifunctional forced centering foot rest, the characteristics such as have that accuracy of alignment is high, easy for installation, good stability, measuring speed are fast, can reuse.Can be widely used in the monitoring of precise engineering survey, pit retaining monitoring, slope monitoring and special engineering etc.
In order to solve the problems of the technologies described above, the technological scheme that the utility model Multifunctional forced centering foot rest is achieved is: comprise mid-game, supporting component and fixing-assembly; Described mid-game is provided with center hole, is provided with the centering cylinder in described center hole, be inlaid with sheath between described centering cylinder and described center hole, the bottom of described centering cylinder is provided with link; The concentricity tolerance of described centering cylinder and center hole is ± 0.01mm; Described supporting component comprises three foot rest rod members, and described foot rest rod member comprises connecting rod, fine tuning structure and the flexible rod that connects from top to bottom, and described fine tuning structure is made of the locking nut at screw and its two ends; Described fixing-assembly is made of fixed platform and tapered spiral ground pile; The upper end of described connecting rod and described hinged to mid-game, the lower end of described flexible rod and described fixed platform are hinged.
The utility model Multifunctional forced centering foot rest, fixing-assembly wherein can also be made of fixed platform and EXPANSION ANCHOR BOLTS anchoring piece.
The utility model Multifunctional forced centering foot rest, wherein, described flexible rod is that two steel pipes of internal-and external diameter coupling form, and fixes with jackscrew between two steel pipes.
Compared with prior art, the beneficial effects of the utility model are:
The utility model will be for the installation and measuring instrument mid-game, supporting component and the fixing-assembly of fixing or imbed the soil body with the bottom surface are made into the composite set of assembling, can be applied to fast and accurately construction survey and monitoring, and can reuse, the utility model can extensive use in various engineering-environments, and can improve precision and the speed of surveying work.
Description of drawings
Fig. 1 is the plan view of the utility model Multifunctional forced centering foot rest;
Fig. 2 is Multifunctional forced centering foot rest shown in Figure 1 top partial structurtes enlarged diagram;
Fig. 3 is the plan view of Multifunctional forced centering foot rest shown in Figure 1;
Fig. 4 is the side view of Multifunctional forced centering foot rest shown in Figure 1;
Fig. 5 is system of coordinates schematic diagram in the utility model experimental example.
In figure:
1-centering cylinder 2-is to mid-game 3-connecting rod
4-link 5,7-locking nut 6-screw
The tapered spiral ground pile of 8-flexible rod 9-fixing-assembly 10-
The 11-sheath.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the utility model Multifunctional forced centering foot rest comprises mid-game, supporting component and fixing-assembly.
Described mid-game 2 is provided with center hole, is provided with centering cylinder 1 in described center hole, be inlaid with sheath 11 between described centering cylinder 1 and described center hole, the bottom of described centering cylinder 1 is provided with link 4;
Described centering cylinder 1 with the concentricity tolerance of center hole is ± 0.01mm;
Described supporting component comprises three foot rest rod members, and described foot rest rod member comprises connecting rod 3, fine tuning structure and the flexible rod 8 that connects from top to bottom, and described fine tuning structure is made of the locking nut 5,7 at screw 6 and its two ends; Described flexible rod 8 forms for two steel pipes of internal-and external diameter coupling, fixes with jackscrew between two steel pipes.
Described fixing-assembly is made of fixed platform 9 and tapered spiral ground pile 10, or is made of fixed platform and EXPANSION ANCHOR BOLTS anchoring piece;
The upper end of described connecting rod 3 and described hinged to mid-game 2, the lower end of described flexible rod 8 and described fixed platform 9 are hinged.
The utility model Multifunctional forced centering foot rest structure is simple, and easy to make, and the below is an example of making:
As shown in Figure 2, mid-game 2 is made by the 10mm Plate Steel, diameter 150mm, the center is the center hole of centering, is inlaid with sheath 11 made of copper in center hole, the diameter of center hole is 20mm.Surveying instrument is by centering cylinder 1(or centering ball) and link 4 centerings and fixing, be that centering cylinder 1 is provided with outside thread, be threaded connection surveying instrument, then centering cylinder 1 inserted in the center hole of centering, and be fixed in mid-game 2 with link 4.In order to guarantee the effect of centering, during machining, the matching precision of centering cylinder and center hole is that the tolerance of coaxality will reach ± 0.01mm, and this tolerance+0.01mm can ignore in measurement error.Flexible rod 8 is comprised of two steel pipes of internal-and external diameter coupling, the outer diameter of steel pipes 35mm of upper half part, internal diameter 30mm, wall thickness 5mm.The outer diameter of steel pipes 30mm of lower half portion, internal diameter 25mm, wall thickness 5mm.Two steel pipes are fixed with jackscrew, unclamp the jackscrew retractable.Be provided with the screw 6 for the fine setting of foot rest length between the top of flexible rod 8 and connecting rod 3, can be by the level of screw 6 adjustment to mid-game 3 after placing the foot rest of support.The structure of fixing-assembly is divided into two kinds: a kind of is the form that is fixed on hardened ground, adopts EXPANSION ANCHOR BOLTS directly to be anchored on hardened ground and gets final product.Another kind is mounted in the form on natural soils ground, because topsoil is loose, can't connect with EXPANSION ANCHOR BOLTS, therefore, the utility model adopts tapered spiral ground pile 10 as shown in Figure 1 and Figure 4 to fix flexible rod 8, at first three tapered spiral ground piles 10 are imbedded the soil body, then the bottom of three flexible rods is separately fixed on the fixed platform at three tapered spiral ground pile tops.
The utility model forced centering foot rest and common foot rest comparative trial for accuracy of alignment, service speed and the stability of verifying the forced centering foot rest, are done respectively two kinds of experiments, and a kind of is to operating comparative trial with common tripod and forced centering tripod; Another kind is to monitor respectively the level of forced centering apparatus and the displacement of vertical direction.
The comparative trial of common straddlebug and the utility model Multifunctional forced centering foot rest in the employing prior art: determine 4 some A, B and C, D, the AB distance is close with the CD distance; A point and B point are one group of object of observation, and C point and D point are another group object of observation.Respectively two groups of object of observations are carried out 10 distance observation.Two groups of observation personnel, instrument and prisms are all identical, and different is to measure A, B spacing with common wooden foot rest, measures C, D spacing the utility model Multifunctional forced centering foot rest.The observation data 1(a that sees the following form) and table 1(b).
Table 1(a) with common foot rest observation data
Table 1(b) with the utility model Multifunctional forced centering foot rest observation data
By above test data, calculate the middle error with two kinds of foot rest observations.Be m=± 1.28mm with error in the distance of common foot rest survey, with error m=± 0.56 in the distance of the utility model Multifunctional forced centering foot rest range finding.Test is respectively observed 10 times, with common foot rest 80 minutes used times of monitoring, with 30 minutes Multifunctional forced centering foot rest used times of the utility model.Can find to be significantly increased on measuring accuracy than with common foot rest with the utility model Multifunctional forced centering foot rest through contrast, measuring speed improves more than 2 times.
The stability test of the utility model Multifunctional forced centering foot rest, main test is in the stability of natural soils ground installation the utility model Multifunctional forced centering foot rest.Select a place that two the utility model Multifunctional forced centering foot rests are installed on natural ground, it is carried out the displacement monitoring of a period of time.Substantially horizontal is taked to find range, the monitoring of the method for angle measurement, and vertical direction is taked the monitoring of Levelling method.Monitoring Data sees Table 2:
Table 2 the utility model Multifunctional forced centering foot rest STABILITY MONITORING data
By above data being carried out computational analysis, mean square error of angle observation M
The angle=± 1.41 ", mean square distance error M
Distance=± 0.00mm, plane mean square error of a point are M
The point=± 1.26mm, mean square error of height are M
High=± 0.13mm.Measuring instrument is come card TC800 electronic tachometer, its measuring precision of angle 3 ", range accuracy is 2mm+1ppm.Above accuracy computation data show in the situation that comprise sighting error and instrument system error, measure mean square error of a point and can reach 1.26mm, illustrate that the stability of forced centering foot rest satisfies the required precision of precision measuremnt fully.
According to testing program, adopt the utility model Multifunctional forced centering foot rest with the method for measurement of Free Station, carried out the field survey experiment.In order to reduce to start at error, measure and adopt independent coordinate system.As shown in Figure 5, take the A point as initial point, coordinate is made as (0,0), take the AB limit as the coordinate longitudinal axis, Accurate Measurement AB distance is 130.063m, and the B point coordinates is (0,130.063), Accurate Measurement C point coordinates is (40.323,20.538), repeatedly to measure the C point coordinates with the Free Station method and carry out the Data Comparison analysis, survey data sees Table 3.
Table 3 measured data and analysis
By above experiment and data analysis (seeing Table 3), the error in point measurement W of measurement
Always=± 1.3mm, the relevant regulations with reference to " architecture Foundation Pit Engineering Specifications of Monitoring Technology " in (GB50497-2009), the Foundation Pit alarming value of high level of security is accumulative total 10mm, rate of change 2mm/d.Illustrate that the utility model Multifunctional forced centering foot rest can satisfy the required precision of pit retaining monitoring.
Use in a plurality of engineerings respectively by above-mentioned experimental technique, and obtained good effect.
The below introduces the applicable cases in a certain building foundation pit monitoring works in detail.
The local 20.3m of this project design of foundation pit degree of depth 14.3～15.3m(), pattern foundation pit supporting structure adopts the deposited reinforced concrete pile support form with 2 road horizontal supports, and the reinforced concrete cast-in-situ structure is adopted in waist rail, ring beam and support.The supporting construction outside is the Soil-cement pile water stopping curtain.The design of foundation pit safety class is one-level.4 reference points are laid in the Foundation Pit monitoring altogether, lay 30 monitoring points.
This project Foundation Pit begins monitoring from August 20th, 2010, so far still in monitoring.Common foot rest conventional method monitoring is adopted in the Horizontal displacement in early stage, and begin to adopt aforesaid experimental technique to monitor in October, 2011.Because engineering is positioned at the area, urban centre, the engineering construction scene is very narrow and small, and margin of foundation pit the most only has 3m apart from enclosure wall.Because site operation material, construction equipment etc. often stop the monitoring sight line, adopt the routine monitoring method very difficult.Often blocked because of sight line during in October, 2011 in the past monitoring, and had the part monitoring point that Monitoring Data can't be provided in time, exactly.
After in October, 2011, by the utility model Multifunctional forced centering foot rest being installed, being adopted the method for Free Station to make horizontal displacement monitoring smooth.Use the forced centering foot rest not only to improve accuracy of observation, speed in the actual monitoring process, and coordinate the method for Free Station to make the monitoring point that does not detect in the past, also can monitor easily now.Particularly at the horizontal support period for removal, in time, accurately, Monitoring Data all sidedly, for the work of foundation ditch supporting removal provides safety guarantee.
To sum up, show by a plurality of experimental examples, the utility model Multifunctional forced centering foot rest has that accuracy of alignment is high, easy for installation, good stability, the characteristics such as can reuse.Can be widely used in the monitoring of precise engineering survey, pit retaining monitoring, slope monitoring and special engineering etc.
Although the above is described the utility model in conjunction with figure; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; in the situation that do not break away from the utility model aim, can also make a lot of distortion, within these all belong to protection of the present utility model.
Claims (4)
1. a Multifunctional forced centering foot rest, comprise mid-game, supporting component and fixing-assembly; It is characterized in that,
Described mid-game (2) is provided with center hole, is provided with centering cylinder (1) in described center hole, be inlaid with sheath (11) between described centering cylinder (1) and described center hole, the bottom of described centering cylinder (1) is provided with link (4);
Described centering cylinder (1) with the concentricity tolerance of center hole is ± 0.01mm;
Described supporting component comprises three foot rest rod members, and described foot rest rod member comprises connecting rod (3), fine tuning structure and the flexible rod (8) that connects from top to bottom, and described fine tuning structure is made of the locking nut (5,7) at screw (6) and its two ends;
Described fixing-assembly is made of fixed platform (9) and tapered spiral ground pile (10);
The upper end of described connecting rod (3) and described hinged to mid-game (2), the lower end of described flexible rod (8) and described fixed platform (9) are hinged.
2. Multifunctional forced centering foot rest according to claim 1, is characterized in that, described flexible rod (8) forms for two steel pipes of internal-and external diameter coupling, fixes with jackscrew between two steel pipes.
3. a Multifunctional forced centering foot rest, comprise mid-game, supporting component and fixing-assembly; It is characterized in that,
Described mid-game (2) is provided with center hole, is provided with centering cylinder (1) in described center hole, be inlaid with sheath (11) between described centering cylinder (1) and described center hole, the bottom of described centering cylinder (1) is provided with link (4);
Described centering cylinder (1) with the concentricity tolerance of center hole is ± 0.01mm;
Described supporting component comprises three foot rest rod members, and described foot rest rod member comprises connecting rod (3), fine tuning structure and the flexible rod (8) that connects from top to bottom, and described fine tuning structure is made of the locking nut (5,7) at screw (6) and its two ends;
Described fixing-assembly is made of fixed platform and EXPANSION ANCHOR BOLTS anchoring piece;
The upper end of described connecting rod (3) and described hinged to mid-game (2), the lower end of described flexible rod (8) and described fixed platform (9) are hinged.
4. Multifunctional forced centering foot rest according to claim 3, is characterized in that, described flexible rod (8) forms for two steel pipes of internal-and external diameter coupling, fixes with jackscrew between two steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220750778 CN203023751U (en) | 2012-12-31 | 2012-12-31 | Multifunctional forced centering foot stool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220750778 CN203023751U (en) | 2012-12-31 | 2012-12-31 | Multifunctional forced centering foot stool |
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| CN203023751U true CN203023751U (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220750778 Expired - Lifetime CN203023751U (en) | 2012-12-31 | 2012-12-31 | Multifunctional forced centering foot stool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016914A (en) * | 2012-12-31 | 2013-04-03 | 天津市建筑科学研究院有限公司 | Multifunctional forced centering leg bracket |
| CN112903006A (en) * | 2021-01-08 | 2021-06-04 | 常州天姆智能科技有限公司 | Be used for intelligent foundation ditch detecting system |
-
2012
- 2012-12-31 CN CN 201220750778 patent/CN203023751U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016914A (en) * | 2012-12-31 | 2013-04-03 | 天津市建筑科学研究院有限公司 | Multifunctional forced centering leg bracket |
| CN112903006A (en) * | 2021-01-08 | 2021-06-04 | 常州天姆智能科技有限公司 | Be used for intelligent foundation ditch detecting system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |