CN103913147B - Hydraulic pressure inserts elevation location device and the positioning action method of steel pipe column - Google Patents
Hydraulic pressure inserts elevation location device and the positioning action method of steel pipe column Download PDFInfo
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- CN103913147B CN103913147B CN201410139148.3A CN201410139148A CN103913147B CN 103913147 B CN103913147 B CN 103913147B CN 201410139148 A CN201410139148 A CN 201410139148A CN 103913147 B CN103913147 B CN 103913147B
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- steel pipe
- pipe column
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
- G01C5/02—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels involving automatic stabilisation of the line of sight
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The present invention relates to elevation location device and positioning action method that a kind of hydraulic pressure inserts steel pipe column.This locating device, is located at the side of steel pipe column, comprises: spirit-leveling instrument, is located on ground, and the erection elevation of described spirit-leveling instrument is greater than the target localization elevation of the anchor point of described steel pipe column; Sopwith staff, be erected on ground, a read text scale corresponding on described Sopwith staff for the erection elevation according to described spirit-leveling instrument, described erection elevation and described target localization elevation, calculate the positional readings that described target localization elevation is corresponding on described Sopwith staff; Geoplane, is located on ground, and described Geoplane comprises Laser emission mouth, for Emission Lasers bundle, and after described laser beam overlaps with the described positional readings on described Sopwith staff by described laser beam irradiation on described steel pipe column.The elevation location device that hydraulic pressure of the present invention inserts steel pipe column has principle simply, and it is convenient to implement, accuracy for vertical control high.
Description
Technical field
The present invention relates to construction account field, espespecially a kind of hydraulic pressure inserts elevation location device and the positioning action method of steel pipe column.
Background technology
Along with the development of track traffic, increasing deep-foundation pit engineering is paid close attention to by people.In large deep foundation pit Structural Engineering, the normal mode adopting steel pipe column to be connected with underground pile basis is as underground structure vertical supporting.In recent years, the technology of mechanical-hydraulic insertion steel pipe column instead of the mode of artificial location and installation gradually, becomes the common technology that Large Steel tubing string is installed.
Hydraulic pressure inserts the method for steel pipe column, and the control mainly through verticality, center and elevation is accurately located steel pipe column.Insert at hydraulic pressure in the construction of steel pipe column, steel pipe column top is too high far from ground, and middle part is encircled by hydropress, can only be controlled by the elevation of part to steel pipe column possessing sighting condition between equipment and ground.This situation controls to bring very big inconvenience to the measurement of higher degree: the first, and spirit-leveling instrument stent open angle reaches capacity, and reduces the height of spirit-leveling instrument to greatest extent, makes reference mark enter the observation visual field.In actual measurement process, spirit-leveling instrument erection shakiness makes reading error excessive, overran operation also occurred and causes support to damage.The second, because spirit-leveling instrument decorating position is too low, survey crew must bend when reading to operate, and even close proximity to ground, easily causes operating mistake, read untrue.
Summary of the invention
The object of the invention is to the defect overcoming prior art, the elevation location device providing a kind of hydraulic pressure to insert steel pipe column and positioning action method, existing spirit-leveling instrument can be solved and produce because stent open reaches capacity the phenomenon that support damages to punctual, and the problem such as the read untrue that erection is unstable and inconvenient operation is brought.
The technical scheme realizing above-mentioned purpose is:
A kind of hydraulic pressure of the present invention inserts the elevation location device of steel pipe column, is located at the side of steel pipe column, comprises:
Spirit-leveling instrument, is located on ground, and the erection elevation of described spirit-leveling instrument is greater than the target localization elevation of the anchor point of described steel pipe column;
Sopwith staff, be erected on ground, for reading scale and the described target localization elevation that the erection elevation according to described spirit-leveling instrument, described erection elevation are corresponding on described Sopwith staff, calculate the positional readings that described target localization elevation is corresponding on described Sopwith staff;
Geoplane, is located on ground, and described Geoplane comprises Laser emission mouth, for Emission Lasers bundle, and after described laser beam overlaps with the described positional readings on described Sopwith staff by described laser beam irradiation on described steel pipe column.
Adopt Geoplane to substitute the operation of original survey crew reading, the misoperation of personnel can be reduced, improve accuracy for vertical control.Geoplane simple to operate, offers convenience to survey crew, can accelerate the speed that hydraulic pressure inserts steel pipe column, improves steel pipe column and inserts efficiency.Spirit-leveling instrument can choose suitable elevation, without the need to being set up in lower position, having stopped existing spirit-leveling instrument and having produced the phenomenon of support damage to punctual because stent open reaches capacity.The elevation location device that hydraulic pressure of the present invention inserts steel pipe column has principle simply, and it is convenient to implement, accuracy for vertical control high.
The further improvement that hydraulic pressure of the present invention inserts the elevation location device of steel pipe column is, described Sopwith staff is located between described spirit-leveling instrument and described steel pipe column, and described Geoplane is located between described Sopwith staff and described steel pipe column.
The further improvement that hydraulic pressure of the present invention inserts the elevation location device of steel pipe column is, described Geoplane also comprises the rotating mechanism for Laser emission mouth direction described in horizontal adjustment.
The further improvement that hydraulic pressure of the present invention inserts the elevation location device of steel pipe column is, described Geoplane also includes elevating mechanism, described elevating mechanism adjusts upward described laser beam in Vertical Square, and described laser beam is overlapped with the described positional readings on described Sopwith staff.
The further improvement that hydraulic pressure of the present invention inserts the elevation location device of steel pipe column is, described spirit-leveling instrument comprises the support adjusting upward described spirit-leveling instrument for Vertical Square, and described support props up to be located on described ground.
A kind of hydraulic pressure of the present invention inserts the elevation location method of operating of steel pipe column, comprising:
Anchor point is set on steel pipe column, and marks described anchor point;
Calculate the target localization elevation of anchor point on described steel pipe column;
Erection spirit-leveling instrument, is placed in the side of described steel pipe column, and erection elevation is greater than described target localization elevation;
Sopwith staff is erected with described spirit-leveling instrument homonymy, read the read text scale on the corresponding described Sopwith staff of described spirit-leveling instrument level, the described read text scale corresponding on described Sopwith staff according to the erection elevation of described spirit-leveling instrument, described erection elevation and described target localization elevation, calculate the positional readings that described target localization elevation is corresponding on described Sopwith staff;
Set up Geoplane with described spirit-leveling instrument homonymy, the height of Laser emission mouth on adjustment Geoplane, makes the laser beam penetrated overlap with the described positional readings on described Sopwith staff;
Adjust the direction of Laser emission mouth on described Geoplane, make described laser beam irradiation on described steel pipe column.
The further improvement that hydraulic pressure of the present invention inserts the elevation location method of operating of steel pipe column is, by hydropress, described steel pipe column is inserted ground, until the described anchor point on described steel pipe column overlaps with described laser beam.
Hydraulic pressure of the present invention inserts steel pipe column elevation location method of operating, and described Geoplane comprises for the rotating mechanism in Laser emission mouth direction described in horizontal adjustment with for the vertical elevating mechanism adjusting described Laser emission open height.
Accompanying drawing explanation
Fig. 1 is the structural representation that hydraulic pressure of the present invention inserts the elevation location device of steel pipe column;
Structural representation when Fig. 2 is the elevation location device use of hydraulic pressure of the present invention insertion steel pipe column;
Fig. 3 is the process flow diagram that hydraulic pressure of the present invention inserts the elevation location method of operating of steel pipe column.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Consult Fig. 1, show the structural representation that hydraulic pressure of the present invention inserts the elevation location device of steel pipe column.Hydraulic pressure of the present invention inserts elevation location device and the positioning action method of steel pipe column, the manual operation of survey crew in prior art is replaced by Geoplane, compare the existing anchor point undertaken by spirit-leveling instrument on manual-alignment steel pipe column, there is accuracy high, feature simple to operation.In addition, spirit-leveling instrument and Sopwith staff is adopted to determine the positioning height of elevation, the target localization elevation of steel pipe is converted mark on Sopwith staff by spirit-leveling instrument, positional readings is formed on Sopwith staff, positional readings again on the laser alignment Sopwith staff of Geoplane transmitting, and then rotary laser scanner, make laser beam irradiation on steel pipe column, with regard to visual in image, the positioning height of elevation is shown on steel pipe column like this, by hydropress, steel pipe column is inserted into underground, when the anchor point on steel pipe column overlaps with laser beam, just reach the restriction of elevation location, stop solution press.The employing of spirit-leveling instrument is by target elevation location height mark on Sopwith staff, so can't produce the phenomenon of support of the prior art damage.Below in conjunction with accompanying drawing, the elevation location device of hydraulic pressure insertion steel pipe column of the present invention and positioning action method are described.
Consult Fig. 1, insert the structural representation of the elevation location device of steel pipe column for hydraulic pressure of the present invention.Below in conjunction with Fig. 1, elevation location device hydraulic pressure of the present invention being inserted to steel pipe column is described.
As shown in Figure 1, the elevation location device that hydraulic pressure of the present invention inserts steel pipe column comprises spirit-leveling instrument 20, Sopwith staff 30 and Geoplane 40, elevation location when steel pipe column 10 being inserted ground for hydropress 50.Spirit-leveling instrument 20, Sopwith staff 30 and Geoplane 40 are located on ground 60, and be located at the same side of steel pipe column 10, as a better embodiment of the present invention, Sopwith staff 30 is located between spirit-leveling instrument 20 and steel pipe column 10, and Geoplane 40 is located between Sopwith staff 30 and steel pipe column 10.Certainly, Sopwith staff 30 also can be arranged between steel pipe column 10 and Geoplane 40, after the positional readings of aiming on Sopwith staff 30 when Geoplane 40 like this, withdraws Sopwith staff 30 and can realize laser beam irradiation that Geoplane 40 sends on steel pipe column 10.
Spirit-leveling instrument 20 comprises support 201, spirit-leveling instrument 20 is located on ground 60 by 201, support, by the angle of adjusting pole 201 feet, the height of spirit-leveling instrument 20 can be adjusted, by support 201, spirit-leveling instrument 20 is adjusted to suitable elevation, this erection elevation is greater than the target localization elevation of steel pipe column, then read text scale 302 corresponding on Sopwith staff 30 is read by spirit-leveling instrument 20 level, according to the erection elevation of spirit-leveling instrument 20, read text scale 302 on Sopwith staff 30 and target localization elevation, convert the positional readings 301 drawn on Sopwith staff 30, this positional readings 301 is the positioning height of anchor point on steel pipe column 10.Geoplane 40 comprises Laser emission mouth, rotating mechanism and elevating mechanism, the laser beam 401 of level is launched by Laser emission mouth, rotating mechanism drives Laser emission mouth to rotate together, the direction of illumination of laser beam 401 is controlled by rotating mechanism, elevating mechanism drives Laser emission mouth to move in vertical direction, the height of the laser beam 401 sent by elevating mechanism adjustment Geoplane 40.By the height of elevating mechanism adjustment laser beam 401, by the direction of rotating mechanism adjustment laser beam 401, laser beam 401 is overlapped with the positional readings on Sopwith staff 30, and such laser beam 401 is exactly the elevation location height that steel pipe column 10 is imbedded apart from the height on ground 60.Shown in composition graphs 2, then by the direction of the rotating mechanism adjustment Laser emission mouth of Geoplane 40, the laser beam 401 that Laser emission mouth is sent exposes on steel pipe column 10, steel pipe column 10 inserts in the process on ground 60 by hydropress 50, when the anchor point 101 on steel pipe column 10 overlaps with laser beam 401, hydropress 50 quits work, and steel pipe column 10 inserts and puts in place.
Shown in Fig. 1 and Fig. 2, principle of work and the process of hydraulic pressure of the present invention being inserted to the elevation location device of steel pipe column are described.
As shown in Figure 1, according to the target localization elevation of the anchor point 101 on the steel pipe column 10 calculated, support 201 on adjustment spirit-leveling instrument 20, spirit-leveling instrument 20 is made to be placed in a suitable elevation, this erection elevation is greater than the target localization elevation of anchor point 101, the read text scale 302 on Sopwith staff 30 is read by spirit-leveling instrument 20 level, read text scale 302 on the erection elevation according to spirit-leveling instrument 20, Sopwith staff 30 and the target localization elevation of anchor point 101, calculate on Sopwith staff 30 should the positional readings 301 of target localization elevation.Start Geoplane 40, give off laser beam 401, rotating mechanism on adjustment Geoplane 40 and elevating mechanism, laser beam 401 is overlapped with the positional readings 301 on Sopwith staff 30, and now the height of laser beam 401 is the positioning height of anchor point 101 on steel pipe column 10.At this moment spirit-leveling instrument 20 can be packed up, and also can place and check operation for follow-up.Then adjust the rotating mechanism of Geoplane 40, the laser beam 401 that Geoplane 40 is sent is irradiated on steel pipe column 10, as shown in Figure 2 Geoplane 40 is revolved turnback, laser beam 401 is irradiated on steel pipe column 10.Adopt hydropress 50 that steel pipe column 10 is pressed into ground 60, when anchor point 101 overlaps with laser beam 401, namely reach the target localization elevation of steel pipe column 10, the operation of stop solution press 50, steel pipe column 10 reaches imbeds requirement.The laser spots be irradiated on steel pipe column 101 by observing laser beam 401 overlaps with anchor point 101, can know and when arrive positioning height, eliminate in prior art, adopts spirit-leveling instrument manual-alignment process, reduces operating mistake.
The beneficial effect that hydraulic pressure of the present invention inserts the elevation location device of steel pipe column is:
Adopt Geoplane to substitute survey crew reading operation in prior art, the misoperation of effective minimizing personnel, improves the degree of accuracy of high process control.Have simple to operate, survey crew need not be bent long-time operation, and this locating device is implemented convenient, and location easily, can be accelerated the speed that hydraulic pressure inserts steel pipe column, improve the work efficiency of hydropress.
Adopt spirit-leveling instrument that target localization elevation is converted mark on Sopwith staff, in order to determine the height of laser beam, and unlike in prior art, spirit-leveling instrument is set up in lower height, more manually carry out horizontal aligument, so can prevent spirit-leveling instrument support from producing the phenomenon damaged.
It is simple that locating device of the present invention has principle, easy to operate, elevation control accuracy high.
Consult Fig. 3, for hydraulic pressure of the present invention inserts the process flow diagram of steel pipe column elevation location method of operating.Below in conjunction with Fig. 3, steel pipe column elevation location method of operating is inserted to hydraulic pressure of the present invention and is described.
As shown in Figure 3, hydraulic pressure insertion steel pipe column elevation location method of operating of the present invention comprises:
Perform step S11, on steel pipe column, mark anchor point.Shown in composition graphs 1, anchor point 101 is set on steel pipe column 10, anchor point 101 is marked.Then step S12 is performed.
Perform step S12, calculate the target localization elevation of steel pipe column anchor point.In conjunction with construction requirement, the degree of depth that in foundation pit enclosure, steel pipe column need be imbedded, calculates the target localization elevation of this location.Then step S13 is performed.
Perform step S13, erection spirit-leveling instrument, adjustment suitable location, is greater than described target localization elevation.On ground 60, set up spirit-leveling instrument 20, shown in composition graphs 1, the support 201 of adjustment spirit-leveling instrument 20, makes erection elevation corresponding to spirit-leveling instrument 20 level be greater than the target localization elevation of anchor point.Preferably, choose the suitable support angle of support 201, avoid support 201 to transfinite and support and damage.Then step S14 is performed.
Perform step S14, erect Sopwith staff, find out on Sopwith staff corresponding target localization elevation positional readings.Sopwith staff 30 is erected between spirit-leveling instrument 20 and steel pipe column 10, read read text scale 302 corresponding on Sopwith staff 30 by spirit-leveling instrument 20 level, then calculate positional readings 301 corresponding on Sopwith staff according to the altimeter of the erection elevation of spirit-leveling instrument 20, target localization elevation and spirit-leveling instrument 20.Then spirit-leveling instrument 20 can be packed up, follow-up can, but also can place and check operation for follow-up.Then step S15 is performed.
Perform step S15, erection Geoplane, adjustment laser beam overlaps with described positional readings.Geoplane comprises for the rotating mechanism in horizontal adjustment Laser emission mouth direction with for the vertical elevating mechanism adjusting Laser emission open height.Geoplane 40 is set up between Sopwith staff 30 and steel pipe column 10, the elevating mechanism of adjustment Geoplane 40 and rotating mechanism, the laser beam 401 sent by Laser emission mouth is overlapped with the positional readings 301 on Sopwith staff 30, then no longer adjust elevating mechanism, determine that the height of laser beam 401 is the positioning height of steel pipe column.Geoplane 40 also can be located between Sopwith staff 30 and spirit-leveling instrument 20.Then step S16 is performed.
Perform step S16, adjustment Geoplane, by laser beam irradiation on described steel pipe column.Shown in composition graphs 2, the rotating mechanism on adjustment Geoplane 40, is irradiated to laser beam 401 on steel pipe column 10, and the laser spots that steel pipe column 10 maps is exactly the minimum altitude restriction of anchor point 101.If Geoplane 40 is located between Sopwith staff 30 and spirit-leveling instrument 20, now only need withdraw Sopwith staff 30, the laser beam 401 that Geoplane 40 Laser emission mouth sends can be irradiated on steel pipe column 10.Then step S17 is performed.
Perform step S17, hydraulic pressure inserts steel pipe column, until the anchor point on described steel pipe column overlaps with described laser beam.Hydropress 50 runs, and is imbedded under ground 60 by steel pipe column 10, until the anchor point 101 on steel pipe column 10 overlaps with the laser spots that laser beam 401 is mapped on steel pipe column 10, hydropress 50 is out of service, and steel pipe column 10 is imbedded and put in place.Then carry out the pre-buried of next steel pipe column, now the height of Geoplane is had good positioning, and can continue to use, and when imbedding adjacent steel pipe column, only need adjust the rotating mechanism of Geoplane, the direction of adjustment laser injection.
The beneficial effect that hydraulic pressure of the present invention inserts steel pipe column elevation location method of operating is:
Adopt Geoplane to substitute survey crew reading operation in prior art, the misoperation of effective minimizing personnel, improves the degree of accuracy of high process control.Have simple to operate, survey crew need not be bent long-time operation, and this locating device is implemented convenient, and location easily, can be accelerated the speed that hydraulic pressure inserts steel pipe column, improve the work efficiency of hydropress.
Adopt spirit-leveling instrument that target localization elevation is converted mark on Sopwith staff, in order to determine the height of laser beam, and unlike in prior art, spirit-leveling instrument is set up in lower height, more manually carry out horizontal aligument, so can prevent spirit-leveling instrument support from producing the phenomenon damaged.
It is simple that localization method of the present invention has principle, easy to operate, elevation control accuracy high.
Below embodiment is to invention has been detailed description by reference to the accompanying drawings, and those skilled in the art can make many variations example to the present invention according to the above description.Thus, some details in embodiment should not form limitation of the invention, the present invention by the scope that defines using appended claims as protection scope of the present invention.
Claims (8)
1. hydraulic pressure inserts an elevation location device for steel pipe column, is located at the side of steel pipe column, it is characterized in that, comprising:
Spirit-leveling instrument, is located on ground, and the erection elevation of described spirit-leveling instrument is greater than the target localization elevation of the anchor point of described steel pipe column;
Sopwith staff, be erected on ground, a read text scale corresponding on described Sopwith staff for the erection elevation according to described spirit-leveling instrument, described erection elevation and described target localization elevation, calculate the positional readings that described target localization elevation is corresponding on described Sopwith staff;
Geoplane, is located on ground; Described Geoplane comprises Laser emission mouth, for Emission Lasers bundle, and after described laser beam overlaps with the described positional readings on described Sopwith staff by described laser beam irradiation on described steel pipe column.
2. hydraulic pressure as claimed in claim 1 inserts the elevation location device of steel pipe column, and it is characterized in that, described Sopwith staff is located between described spirit-leveling instrument and described steel pipe column, and described Geoplane is located between described Sopwith staff and described steel pipe column.
3. hydraulic pressure as claimed in claim 1 inserts the elevation location device of steel pipe column, it is characterized in that, described Geoplane also comprises the rotating mechanism for Laser emission mouth direction described in horizontal adjustment.
4. the hydraulic pressure as described in any one of claims 1 to 3 inserts the elevation location device of steel pipe column, it is characterized in that, described Geoplane also includes elevating mechanism, described elevating mechanism adjusts upward described laser beam in Vertical Square, and described laser beam is overlapped with the described positional readings on described Sopwith staff.
5. hydraulic pressure as claimed in claim 1 inserts the elevation location device of steel pipe column, and it is characterized in that, described spirit-leveling instrument comprises the support adjusting upward described spirit-leveling instrument for Vertical Square, and described support props up to be located on described ground.
6. hydraulic pressure inserts an elevation location method of operating for steel pipe column, it is characterized in that, comprising:
Anchor point is set on steel pipe column, and marks described anchor point;
Calculate the target localization elevation of anchor point on described steel pipe column;
Erection spirit-leveling instrument, is placed in the side of described steel pipe column, and erection elevation is greater than described target localization elevation;
Sopwith staff is erected with described spirit-leveling instrument homonymy, read the read text scale on the corresponding described Sopwith staff of described spirit-leveling instrument level, the described read text scale corresponding on described Sopwith staff according to the erection elevation of described spirit-leveling instrument, described erection elevation and described target localization elevation, calculate the positional readings that described target localization elevation is corresponding on described Sopwith staff;
Set up Geoplane with described spirit-leveling instrument homonymy, the height of Laser emission mouth on adjustment Geoplane, makes the laser beam penetrated overlap with the described positional readings on described Sopwith staff;
Adjust the direction of Laser emission mouth on described Geoplane, make described laser beam irradiation on described steel pipe column, if Geoplane is located between Sopwith staff and spirit-leveling instrument, now only need to withdraw Sopwith staff, the laser beam that Geoplane emission port sends can be irradiated on steel pipe column.
7. the elevation location method of operating of steel pipe column as claimed in claim 6, is characterized in that, by hydropress, described steel pipe column is inserted ground, until the described anchor point on described steel pipe column overlaps with described laser beam.
8. the elevation location method of operating of steel pipe column as claimed in claims 6 or 7, is characterized in that, described Geoplane comprises for the rotating mechanism in Laser emission mouth direction described in horizontal adjustment with for the vertical elevating mechanism adjusting described Laser emission open height.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410139148.3A CN103913147B (en) | 2014-04-09 | 2014-04-09 | Hydraulic pressure inserts elevation location device and the positioning action method of steel pipe column |
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| CN201410139148.3A CN103913147B (en) | 2014-04-09 | 2014-04-09 | Hydraulic pressure inserts elevation location device and the positioning action method of steel pipe column |
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| CN103913147B true CN103913147B (en) | 2016-03-30 |
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| CN106958244B (en) * | 2017-04-27 | 2019-01-29 | 中铁隧道集团四处有限公司 | The installation and locating method of ultra-deep and large diameter steel pipe column |
| CN112097596B (en) * | 2020-09-08 | 2022-06-14 | 鞍钢股份有限公司 | Device and method for rapidly measuring height of guide ruler |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19723654C2 (en) * | 1996-07-24 | 2001-05-17 | Sokkia Co | Electronic leveling device and leveling staff for use with the leveling device |
| DE102006030933A1 (en) * | 2005-07-19 | 2007-02-01 | Argus Geotech Gmbh | Leveling staff for leveling instrument for measurement of height difference of two ground points, has transparent support unit positioned in its front region, and light sources arranged in/at slat body to produce shining-through light |
| CN203274729U (en) * | 2013-04-28 | 2013-11-06 | 上海勘测设计研究院 | Soft soil area horizontal elevation measuring control point |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008268109A (en) * | 2007-04-24 | 2008-11-06 | Shimizu Corp | Survey system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19723654C2 (en) * | 1996-07-24 | 2001-05-17 | Sokkia Co | Electronic leveling device and leveling staff for use with the leveling device |
| DE102006030933A1 (en) * | 2005-07-19 | 2007-02-01 | Argus Geotech Gmbh | Leveling staff for leveling instrument for measurement of height difference of two ground points, has transparent support unit positioned in its front region, and light sources arranged in/at slat body to produce shining-through light |
| CN203274729U (en) * | 2013-04-28 | 2013-11-06 | 上海勘测设计研究院 | Soft soil area horizontal elevation measuring control point |
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