CN103727934A - Precise construction sampling method for cantilever bridge construction - Google Patents
Precise construction sampling method for cantilever bridge construction Download PDFInfo
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- CN103727934A CN103727934A CN201410025067.0A CN201410025067A CN103727934A CN 103727934 A CN103727934 A CN 103727934A CN 201410025067 A CN201410025067 A CN 201410025067A CN 103727934 A CN103727934 A CN 103727934A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
Abstract
The invention discloses a precise construction sampling method for cantilever bridge construction. According to the method, two control points for precise construction sampling of the cantilever bridge construction are sampled in an observation stabilization stage by centering an observation pier forcibly; then, a sampling point is precisely determined by erecting total stations at the two control points for observing each other. The construction sampling of the cantilever bridge construction is performed by the utilizing the method, the sampling stability of the cantilever bridge construction can be guaranteed, and the sampling precision of the cantilever bridge construction can also be improved.
Description
Technical field
The present invention relates to a kind of accurate construction lofting method of cantilever glider bridge construction.
Background technology
For tall and big cantilever glider bridge, the accuracy of construction lofting is a key factor that determines construction quality and success or failure.The accuracy of construction lofting relates generally to plane positioning and elevation location.And the accuracy of plane positioning is the most important thing in construction lofting quality control.The large area of building of mountainous area highway is launched at present, and tall and big bridge, particularly high pier bridge are more and more.Cantilever glider bridge or T steel structure beam bridge are very extensive in the use in mountain area, and the height of pier is higher, require the construction lofting quality of basis, pier shaft, cantilever segment higher.Often occur because construction lofting error is too large, even occurring the wrong generation that causes fried pier, ruins pier event, to national economy, cause certain loss.And there is very large risk in the total powerstation polar method construction lofting method that traditional construction lofting technology, particularly domestic unit in charge of construction generally adopt.For example, in mountain area, the distance of lofting control point and basis, high pier and cantilever segment layout point, due to the restriction of landform, often reaches 200-300 meters far even farther.Long setting-out distance like this, any tiny error in measuring process is all likely amplified to the poor scope of limit over regulation and stipulation.So, the method for the accurate construction lofting of a kind of cantilever glider bridge need to be proposed.
Summary of the invention
In order to solve current cantilever glider bridge construction lofting, be prone to error and cause the affected technical matters of engineering, the invention provides a kind of accurate construction lofting method of cantilever glider bridge construction.
Technical scheme of the present invention is that a kind of accurate construction lofting method of cantilever glider bridge construction, comprises the steps:
Step 1: set up total powerstation near forced centering observation stand cantilever glider bridge construction place and observe by being arranged on, setting-out goes out construct two reference mark of accurate construction lofting of cantilever glider bridge, the firmly quality section of the end of the bridge of the extended line that two reference mark are cantilever glider bridge bridge axis on two reverse directions of cantilever glider bridge and the position that can observe mutually;
Step 2: establishing pre-layout point is that cantilever beam section is along the mid point a of bridge axis direction length, now making one of them reference mark is A, and another reference mark is B, A in theory, a, B three point on a straight line, at reference mark, A place sets up total powerstation, and the aiming subtend reference mark B that faces left determines article one direction of visual lines, then on article one direction of visual lines, take reference mark A as starting point, and the distance of take between reference mark A and pre-layout point a is length, determines position 1;
Step 3: the total powerstation setting up on the A of reference mark again, coil right aiming subtend reference mark B, determine second direction of visual lines, then, on second direction of visual lines, take reference mark A as starting point, the distance of take between reference mark A and pre-layout point a is length, determines position 2;
Step 4: fetch bit put 1 and position 2 between the mid point of line as the setting-out a1 that just fixes a point;
Step 5: set up total powerstation again on the B of reference mark, the aiming subtend reference mark A that faces left determines the 3rd direction of visual lines, then, on the 3rd direction of visual lines, take reference mark B as starting point, and the distance of take between reference mark B and pre-layout point a is length, determines position 3;
Step 6: set up total powerstation again on the B of reference mark, coil right aiming subtend reference mark A and determine the 4th direction of visual lines, then, on the 4th direction of visual lines, take reference mark B as starting point, the distance of take between reference mark B and pre-layout point a is length, determines position 4;
Step 7: fetch bit put 3 and position 4 between the mid point of line as setting-out time fixed point a2;
Step 8: pick and place the sample accurate layout point that between a1 and setting-out time fixed point a2, the mid point of line is ordered as a of just fixing a point.
Technique effect of the present invention is, can guarantee the accuracy of construction lofting, also can expand the suitable time of construction lofting, has solved the accuracy problem of cantilever glider bridge construction lofting, greatly reduces error probability and the risk of construction lofting.
Below in conjunction with accompanying drawing, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Embodiment
Referring to Fig. 1, the present invention includes following steps:
Step 1: set up total powerstation near forced centering observation stand cantilever glider bridge construction place and observe by being arranged on, setting-out goes out construct two reference mark of accurate construction lofting of cantilever glider bridge, the firmly quality section of the end of the bridge of the extended line that two reference mark are cantilever glider bridge bridge axis on two reverse directions of cantilever glider bridge and the position that can observe mutually;
Step 2: establishing pre-layout point is that cantilever beam section is along the mid point a of bridge axis direction length, now making one of them reference mark is A, and another reference mark is B, A in theory, a, B three point on a straight line, at reference mark, A place sets up total powerstation, and the aiming subtend reference mark B that faces left determines article one direction of visual lines, then on article one direction of visual lines, take reference mark A as starting point, and the distance of take between reference mark A and pre-layout point a is length, determines position 1;
Step 3: the total powerstation setting up on the A of reference mark again, coil right aiming subtend reference mark B, determine second direction of visual lines, then, on second direction of visual lines, take reference mark A as starting point, the distance of take between reference mark A and pre-layout point a is length, determines position 2;
Step 4: fetch bit put 1 and position 2 between the mid point of line as the setting-out a1 that just fixes a point;
Step 5: set up total powerstation again on the B of reference mark, the aiming subtend reference mark A that faces left determines the 3rd direction of visual lines, then, on the 3rd direction of visual lines, take reference mark B as starting point, and the distance of take between reference mark B and pre-layout point a is length, determines position 3;
Step 6: set up total powerstation again on the B of reference mark, coil right aiming subtend reference mark A and determine the 4th direction of visual lines, then, on the 4th direction of visual lines, take reference mark B as starting point, the distance of take between reference mark B and pre-layout point a is length, determines position 4;
Step 7: fetch bit put 3 and position 4 between the mid point of line as setting-out time fixed point a2;
Step 8: pick and place the sample accurate layout point that between a1 and setting-out time fixed point a2, the mid point of line is ordered as a of just fixing a point.
Claims (1)
1. an accurate construction lofting method for cantilever glider bridge construction, is characterized in that, comprises the steps:
Step 1: set up total powerstation near forced centering observation stand cantilever glider bridge construction place and observe by being arranged on, setting-out goes out construct two reference mark of accurate construction lofting of cantilever glider bridge, the firmly quality section of the end of the bridge of the extended line that two reference mark are cantilever glider bridge bridge axis on two reverse directions of cantilever glider bridge and the position that can observe mutually;
Step 2: establishing pre-layout point is that cantilever beam section is along the mid point a of bridge axis direction length, now making one of them reference mark is A, and another reference mark is B, A in theory, a, B three point on a straight line, at reference mark, A place sets up total powerstation, and the aiming subtend reference mark B that faces left determines article one direction of visual lines, then on article one direction of visual lines, take reference mark A as starting point, and the distance of take between reference mark A and pre-layout point a is length, determines position 1;
Step 3: the total powerstation setting up on the A of reference mark again, coil right aiming subtend reference mark B, determine second direction of visual lines, then, on second direction of visual lines, take reference mark A as starting point, the distance of take between reference mark A and pre-layout point a is length, determines position 2;
Step 4: fetch bit put 1 and position 2 between the mid point of line as the setting-out a1 that just fixes a point;
Step 5: set up total powerstation again on the B of reference mark, the aiming subtend reference mark A that faces left determines the 3rd direction of visual lines, then, on the 3rd direction of visual lines, take reference mark B as starting point, and the distance of take between reference mark B and pre-layout point a is length, determines position 3;
Step 6: set up total powerstation again on the B of reference mark, coil right aiming subtend reference mark A and determine the 4th direction of visual lines, then, on the 4th direction of visual lines, take reference mark B as starting point, the distance of take between reference mark B and pre-layout point a is length, determines position 4;
Step 7: fetch bit put 3 and position 4 between the mid point of line as setting-out time fixed point a2;
Step 8: pick and place the sample accurate layout point that between a1 and setting-out time fixed point a2, the mid point of line is ordered as a of just fixing a point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025067.0A CN103727934B (en) | 2014-01-20 | 2014-01-20 | A kind of accurate construction lofting method of cantilever glider bridge construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025067.0A CN103727934B (en) | 2014-01-20 | 2014-01-20 | A kind of accurate construction lofting method of cantilever glider bridge construction |
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| Publication Number | Publication Date |
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| CN103727934A true CN103727934A (en) | 2014-04-16 |
| CN103727934B CN103727934B (en) | 2016-03-16 |
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| CN201410025067.0A Expired - Fee Related CN103727934B (en) | 2014-01-20 | 2014-01-20 | A kind of accurate construction lofting method of cantilever glider bridge construction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030019A (en) * | 2019-05-28 | 2019-07-19 | 中国五冶集团有限公司 | A kind of Tunnel steel arch-shelf quick positioning and laying-out method |
| CN110057245A (en) * | 2019-03-11 | 2019-07-26 | 中国人民解放军63883部队 | A kind of setting out method of directive reference, high-accuracy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10275299A (en) * | 1997-03-31 | 1998-10-13 | Saginomiya Seisakusho Inc | Vehicle position recognition device for parking lot and parking lot management system |
| CN101158146A (en) * | 2007-11-20 | 2008-04-09 | 中铁大桥局集团第二工程有限公司 | Cable-stayed bridge main-beam sliding form frame system and construction method |
-
2014
- 2014-01-20 CN CN201410025067.0A patent/CN103727934B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10275299A (en) * | 1997-03-31 | 1998-10-13 | Saginomiya Seisakusho Inc | Vehicle position recognition device for parking lot and parking lot management system |
| CN101158146A (en) * | 2007-11-20 | 2008-04-09 | 中铁大桥局集团第二工程有限公司 | Cable-stayed bridge main-beam sliding form frame system and construction method |
Non-Patent Citations (1)
| Title |
|---|
| 赖海军: "测量中以2点找第三点的一些方法应用", 《科技传播》, no. 18, 10 October 2013 (2013-10-10), pages 138 - 149 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057245A (en) * | 2019-03-11 | 2019-07-26 | 中国人民解放军63883部队 | A kind of setting out method of directive reference, high-accuracy |
| CN110057245B (en) * | 2019-03-11 | 2021-06-04 | 中国人民解放军63883部队 | High-precision lofting method for shooting datum |
| CN110030019A (en) * | 2019-05-28 | 2019-07-19 | 中国五冶集团有限公司 | A kind of Tunnel steel arch-shelf quick positioning and laying-out method |
| CN110030019B (en) * | 2019-05-28 | 2021-12-31 | 中国五冶集团有限公司 | Rapid positioning lofting method for tunnel primary support steel arch frame |
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| CN103727934B (en) | 2016-03-16 |
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Granted publication date: 20160316 Termination date: 20170120 |