CN104655092A - Triangular single well directional measurement method used in subway shield construction - Google Patents
Triangular single well directional measurement method used in subway shield construction Download PDFInfo
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- CN104655092A CN104655092A CN201310595697.7A CN201310595697A CN104655092A CN 104655092 A CN104655092 A CN 104655092A CN 201310595697 A CN201310595697 A CN 201310595697A CN 104655092 A CN104655092 A CN 104655092A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
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Abstract
The invention discloses a triangular single well directional measurement method used in subway shield construction. The method comprises the following steps: 1, solving the problems of long line and small shield construction radius; 2, measuring; 3, improving the checking precision; 4, calculating; and 5, obtaining a result, and examining. The method adopting a triangular technique has the advantages of good stability, completion through using a traditional measurement device, and high practicality.
Description
Technical field
The present invention is specially a kind of triangle individual well orientation survey method used in subway shield tunnel construction.
Background technology
Along with the development of society, subway plays a part more and more important to urban transportation, and in subway work, affect a lot of because have of tunnel holing through, wherein orientation survey error is to tunnel line and be through with considerable influence.Herein by the applied research of marking connection triangle orientation survey in shield-tunneling construction to Tianjin Underground No. 9 line q, summarize some experiences, for Metro survey reference.Shield structure carries out underground headwork after being appeared by vertical shaft, and in order to ensure that shield structure correctly tunnels along design axis, the coordinate in terrestrial net, direction and elevation must go down by we with being delivered to.These transmission work are called connection survey.Connection survey comprises: ground nearly well tracerse survey and nearly well water locating tab assembly; By orientation survey and the elevation transference measurement of vertical shaft, inclined shaft, galleries, boring.Wherein the transmission in coordinate and direction, is called orientation survey.The error of orientation survey has a significant impact tunnel holing through, the displacement that the error of wherein coordinate transmission will make each point of underground conducting wire produce same numerical value, and it is a constant on through impact.The error that deflection transmits, each edge direction angle of underground conducting wire will be made to rotate an error amount, and the increase along with conductor length increases through impact by it.As can be seen here, in tunnel survey, the accuracy requirement of orientation survey is very high, and technical difficulty is large.Incorporation engineering reality is mainly discussed to connection triangle individual well Directional Method herein.
Summary of the invention
Technical matters solved by the invention is to provide a kind of triangle individual well orientation survey method used in subway shield tunnel construction, to solve the problem proposed in above-mentioned background technology.
In order to achieve the above object, the present invention realizes by the following technical solutions:
The triangle individual well orientation survey method used in subway shield tunnel construction, comprises the following steps:
(1) problem that circuit is long, shield-tunneling construction radius is little is solved;
(2) specification specifies that the underground directed edge of orientation survey should not be less than 2, the geometric relationship of lower two directed edges is checked easily, space, this engineering Appropriate application station, make the mutual intervisibility of left and right line near-shaft control point, namely such left and right line has a public directed edge, when not increasing reference mark, meets code requirement, simplify measuring process, also improve check precision;
(3) to the problem of ground control point instability, mainly by increasing reference mark, end well place, make reference mark as far as possible away from construction area; When doing connection survey at every turn, increase survey station, check mutually, improve precision; Wind-force can make steel wire swing, and along with the increase of the end well degree of depth, steel wire can be larger in the amplitude of ground lower swing, affects observed result, should select to measure when wind is little as far as possible, therefore need to be advanced by solution weather condition;
(4) when measuring steel wire, if light is not strong, does not see Chu Gangsi, reflector plate can be stained with on steel wire, allow reflector plate center line and steel wire overlap completely, only need measure reflector plate during measurement just passable;
(5) connection triangle should be long and narrow extended configuration, total station survey is applied when layouting, to ensure that institute's cloth triangle meets the demands, when doing orientation survey, hang 3 steel wires at every turn, make two connection triangle, independent observation number of times can be reduced like this, after calculating, can check mutually, improve measuring accuracy;
(6) connection triangle is carried out to the error adjustment of the length of side and angle, improve measuring accuracy, the distance between two sash weight lines should be long as much as possible;
(7) steel ruler examined and determine is adopted during linear measure, each independent observation 3 survey time, per survey time comes and goes 3 readings, and each survey time is poor should be less than 0.5mm on the ground, 1.0mm should be less than, to reach same with the underground survey poor requirement being less than 2.0mm on the ground in underground; Best above and below ground is measured simultaneously; In tunnel, all reference mark all adopt forced centering, reduce error in point measurement;
(8) calculate: the 1) adjustment of the triangle length of side and correction; 2) adjustment correction of angle measurement part: the adjustment correction of A. ground angle measurement part; B. the adjustment correction of underground angle measurement part; C. last, extrapolate underground starting point coordinate and play the position angle of initial line, select best transfer route during calculating, generally take little angle transmission method to be good.D. another triangle adopts and in like manner processes, and finally, the data resolved by two groups of triangles are carried out process and are net result;
(9) result and inspection: according to the actual conditions of sub. shallow mining method, lateral breakthrough error primarily of ground control survey error, shield starting place connection survey error, hole, shield place central coordinate surveying error, underground conducting wire measure and shield attitude location survey error component impact.Specification specifies that through medial error is ± 50mm, and at present, general piercing error all controls at about 30mm-40mm, and this interval is improved through the classic method measured connection survey and underground conducting wire, and piercing error only has 13mm.
Further, the problem described in step (1) we mainly through increasing survey frequency, increase position number, two-conductor line method and carry out controls solution.
beneficial effect:
The inventive method connection triangle method owing to there being reasonable stability, and just can complete with traditional measurement instrument, and practicality is high.
Embodiment
Reaching object to make technological means of the present invention, creation characteristic, workflow, using method and effect is easy to understand, below in conjunction with the specific embodiment of the invention, setting forth the present invention further.
Case study on implementation one:
The triangle individual well orientation survey method used in subway shield tunnel construction, comprises following concrete steps:
(1) problem that circuit is long, shield-tunneling construction radius is little is solved;
(2) specification specifies that the underground directed edge of orientation survey is 2, the geometric relationship of lower two directed edges is checked easily, space, this engineering Appropriate application station, make the mutual intervisibility of left and right line near-shaft control point, namely such left and right line has a public directed edge, when not increasing reference mark, meets code requirement, simplify measuring process, also improve check precision;
(3) to the problem of ground control point instability, mainly by increasing reference mark, end well place, make reference mark as far as possible away from construction area; When doing connection survey at every turn, increase survey station, check mutually, improve precision; Wind-force can make steel wire swing, and along with the increase of the end well degree of depth, steel wire can be larger in the amplitude of ground lower swing, affects observed result, should select to measure when wind is little as far as possible, therefore need to be advanced by solution weather condition;
(4) when measuring steel wire, if light is not strong, does not see Chu Gangsi, reflector plate can be stained with on steel wire, allow reflector plate center line and steel wire overlap completely, only need measure reflector plate during measurement just passable;
(5) connection triangle should be long and narrow extended configuration, total station survey is applied when layouting, to ensure that institute's cloth triangle meets the demands, when doing orientation survey, hang 3 steel wires at every turn, make two connection triangle, independent observation number of times can be reduced like this, after calculating, can check mutually, improve measuring accuracy;
(6) connection triangle is carried out to the error adjustment of the length of side and angle, improve measuring accuracy, the distance between two sash weight lines should be long as much as possible;
(7) adopt the steel ruler examined and determine during linear measure, each independent observation 3 survey time, per survey time comes and goes 3 readings, and each survey time is poor should be 0.3mm on the ground, should be 0.8mm in underground;
(8) calculate: the 1) adjustment of the triangle length of side and correction; 2) adjustment correction of angle measurement part: the adjustment correction of A. ground angle measurement part; B. the adjustment correction of underground angle measurement part; C. last, extrapolate underground starting point coordinate and play the position angle of initial line, select best transfer route during calculating, generally take little angle transmission method to be good.D. another triangle adopts and in like manner processes, and finally, the data resolved by two groups of triangles are carried out process and are net result;
(9) result and inspection: according to the actual conditions of sub. shallow mining method, lateral breakthrough error primarily of ground control survey error, shield starting place connection survey error, hole, shield place central coordinate surveying error, underground conducting wire measure and shield attitude location survey error component impact.Specification specifies that through medial error is-50mm, and at present, general piercing error all controls at about 30mm.
Further, the problem described in step (1) we mainly through increasing survey frequency, increase position number, two-conductor line method and carry out controls solution.
Case study on implementation two:
The triangle individual well orientation survey method used in subway shield tunnel construction, comprises following concrete steps:
(1) problem that circuit is long, shield-tunneling construction radius is little is solved;
(2) specification specifies that the underground directed edge of orientation survey is 3, the geometric relationship of lower two directed edges is checked easily, space, this engineering Appropriate application station, make the mutual intervisibility of left and right line near-shaft control point, namely such left and right line has a public directed edge, when not increasing reference mark, meets code requirement, simplify measuring process, also improve check precision;
(3) to the problem of ground control point instability, mainly by increasing reference mark, end well place, make reference mark as far as possible away from construction area; When doing connection survey at every turn, increase survey station, check mutually, improve precision; Wind-force can make steel wire swing, and along with the increase of the end well degree of depth, steel wire can be larger in the amplitude of ground lower swing, affects observed result, should select to measure when wind is little as far as possible, therefore need to be advanced by solution weather condition;
(4) when measuring steel wire, if light is not strong, does not see Chu Gangsi, reflector plate can be stained with on steel wire, allow reflector plate center line and steel wire overlap completely, only need measure reflector plate during measurement just passable;
(5) connection triangle should be long and narrow extended configuration, total station survey is applied when layouting, to ensure that institute's cloth triangle meets the demands, when doing orientation survey, hang 3 steel wires at every turn, make two connection triangle, independent observation number of times can be reduced like this, after calculating, can check mutually, improve measuring accuracy;
(6) connection triangle is carried out to the error adjustment of the length of side and angle, improve measuring accuracy, the distance between two sash weight lines should be long as much as possible;
(7) adopt the steel ruler examined and determine during linear measure, each independent observation 3 survey time, per survey time comes and goes 3 readings, and each survey time is poor answers 0.4mm on the ground, should be less than 0.9mm in underground;
(8) calculate: the 1) adjustment of the triangle length of side and correction; 2) adjustment correction of angle measurement part: the adjustment correction of A. ground angle measurement part; B. the adjustment correction of underground angle measurement part; C. last, extrapolate underground starting point coordinate and play the position angle of initial line, select best transfer route during calculating, generally take little angle transmission method to be good.D. another triangle adopts and in like manner processes, and finally, the data resolved by two groups of triangles are carried out process and are net result;
(9) result and inspection: according to the actual conditions of sub. shallow mining method, lateral breakthrough error primarily of ground control survey error, shield starting place connection survey error, hole, shield place central coordinate surveying error, underground conducting wire measure and shield attitude location survey error component impact.Specification specifies that through medial error is 10mm, and at present, general piercing error all controls at about 35mm.
Further, the problem described in step (1) we mainly through increasing survey frequency, increase position number, two-conductor line method and carry out controls solution.
Case study on implementation three:
The triangle individual well orientation survey method used in subway shield tunnel construction, comprises following concrete steps:
(1) problem that circuit is long, shield-tunneling construction radius is little is solved;
(2) specification specifies that the underground directed edge of orientation survey should not be less than 4, the geometric relationship of lower two directed edges is checked easily, space, this engineering Appropriate application station, make the mutual intervisibility of left and right line near-shaft control point, namely such left and right line has a public directed edge, when not increasing reference mark, meets code requirement, simplify measuring process, also improve check precision;
(3) to the problem of ground control point instability, mainly by increasing reference mark, end well place, make reference mark as far as possible away from construction area; When doing connection survey at every turn, increase survey station, check mutually, improve precision; Wind-force can make steel wire swing, and along with the increase of the end well degree of depth, steel wire can be larger in the amplitude of ground lower swing, affects observed result, should select to measure when wind is little as far as possible, therefore need to be advanced by solution weather condition;
(4) when measuring steel wire, if light is not strong, does not see Chu Gangsi, reflector plate can be stained with on steel wire, allow reflector plate center line and steel wire overlap completely, only need measure reflector plate during measurement just passable;
(5) connection triangle should be long and narrow extended configuration, total station survey is applied when layouting, to ensure that institute's cloth triangle meets the demands, when doing orientation survey, hang 3 steel wires at every turn, make two connection triangle, independent observation number of times can be reduced like this, after calculating, can check mutually, improve measuring accuracy;
(6) connection triangle is carried out to the error adjustment of the length of side and angle, improve measuring accuracy, the distance between two sash weight lines should be long as much as possible;
(7) adopt the steel ruler examined and determine during linear measure, each independent observation 3 survey time, per survey time comes and goes 3 readings, and each survey time is poor should be 0.5mm on the ground, should be 1.0mm in underground;
(8) calculate: the 1) adjustment of the triangle length of side and correction; 2) adjustment correction of angle measurement part: the adjustment correction of A. ground angle measurement part; B. the adjustment correction of underground angle measurement part; C. last, extrapolate underground starting point coordinate and play the position angle of initial line, select best transfer route during calculating, generally take little angle transmission method to be good.D. another triangle adopts and in like manner processes, and finally, the data resolved by two groups of triangles are carried out process and are net result;
(9) result and inspection: according to the actual conditions of sub. shallow mining method, lateral breakthrough error primarily of ground control survey error, shield starting place connection survey error, hole, shield place central coordinate surveying error, underground conducting wire measure and shield attitude location survey error component impact.Specification specifies that through medial error is 50mm, and at present, general piercing error all controls at about 40mm.
Further, the problem described in step (1) we mainly through increasing survey frequency, increase position number, two-conductor line method and carry out controls solution.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention; the technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and application claims protection domain is defined by appending claims and equivalent thereof.
Claims (2)
1. the triangle individual well orientation survey method used in subway shield tunnel construction, is characterized in that, comprise the following steps:
(1) problem that circuit is long, shield-tunneling construction radius is little is solved;
(2) specification specifies that the underground directed edge of orientation survey is no less than 2, the geometric relationship of lower two directed edges is checked easily, space, this engineering Appropriate application station, make the mutual intervisibility of left and right line near-shaft control point, namely such left and right line has a public directed edge, when not increasing reference mark, meets code requirement, simplify measuring process, also improve check precision;
(3) to the problem of ground control point instability, mainly by increasing reference mark, end well place, make reference mark as far as possible away from construction area; When doing connection survey at every turn, increase survey station, check mutually, improve precision; Wind-force can make steel wire swing, and along with the increase of the end well degree of depth, steel wire can be larger in the amplitude of ground lower swing, affects observed result, should select to measure when wind is little as far as possible, therefore need to be advanced by solution weather condition;
(4) when measuring steel wire, if light is not strong, does not see Chu Gangsi, reflector plate can be stained with on steel wire, allow reflector plate center line and steel wire overlap completely, only need measure reflector plate during measurement just passable;
(5) connection triangle should be long and narrow extended configuration, total station survey is applied when layouting, to ensure that institute's cloth triangle meets the demands, when doing orientation survey, hang 3 steel wires at every turn, make two connection triangle, independent observation number of times can be reduced like this, after calculating, can check mutually, improve measuring accuracy;
(6) connection triangle is carried out to the error adjustment of the length of side and angle, improve measuring accuracy, the distance between two sash weight lines should be long as much as possible;
(7) steel ruler examined and determine is adopted during linear measure, each independent observation 3 survey time, per survey time comes and goes 3 readings, and each survey time is poor should be less than 0.5mm on the ground, 1.0mm should be less than, to reach same with the underground survey poor requirement being less than 2.0mm on the ground in underground; Best above and below ground is measured simultaneously; In tunnel, all reference mark all adopt forced centering, reduce error in point measurement;
(8) calculate: the 1) adjustment of the triangle length of side and correction; 2) adjustment correction of angle measurement part: the adjustment correction of A. ground angle measurement part; B. the adjustment correction of underground angle measurement part; C. last, extrapolate underground starting point coordinate and play the position angle of initial line, select best transfer route during calculating, generally take little angle transmission method to be good; D. another triangle adopts and in like manner processes, and finally, the data resolved by two groups of triangles are carried out process and are net result;
(9) result and inspection: according to the actual conditions of sub. shallow mining method, lateral breakthrough error primarily of ground control survey error, shield starting place connection survey error, hole, shield place central coordinate surveying error, underground conducting wire measure and shield attitude location survey error component impact, specification specifies that through medial error is ± 50mm, at present, general piercing error all controls between 30mm-40mm, and this interval is improved through the classic method measured connection survey and underground conducting wire.
2. a kind of triangle individual well orientation survey method used in subway shield tunnel construction according to claim 1, it is characterized in that, the existing problems described in step (1) we mainly through increasing survey frequency, increase position number and two-conductor line method and carry out controls solution.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767731A (en) * | 2016-11-30 | 2017-05-31 | 中国电建集团铁路建设有限公司 | A kind of connection triangle measurement apparatus and measuring method |
| CN109667591A (en) * | 2018-12-27 | 2019-04-23 | 上海市机械施工集团有限公司 | A kind of construction method of the sharp radius curve section of shield tunnel |
| CN109708624A (en) * | 2018-12-17 | 2019-05-03 | 中冶天工集团有限公司 | A kind of method that the survey of construction of structures compact district sets control net |
| CN111006639A (en) * | 2019-12-16 | 2020-04-14 | 江苏苏州地质工程勘察院 | Interval tunnel penetration measurement method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685010A (en) * | 2008-09-27 | 2010-03-31 | 上海市机械施工有限公司 | Measuring method of ultra long haul shield tunnel |
| CN102095401A (en) * | 2010-12-06 | 2011-06-15 | 上海隧道工程股份有限公司 | Long-distance shield tunnel breakthrough survey method |
| CN103115605A (en) * | 2013-01-31 | 2013-05-22 | 大连市勘察测绘研究院有限公司 | Subway shaft orientated measurement method based on connected triangle |
| CN103196417A (en) * | 2013-03-18 | 2013-07-10 | 中国建筑土木建设有限公司 | Method for performing shaft orientation measurement by adopting double-connection triangle |
-
2013
- 2013-11-25 CN CN201310595697.7A patent/CN104655092A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685010A (en) * | 2008-09-27 | 2010-03-31 | 上海市机械施工有限公司 | Measuring method of ultra long haul shield tunnel |
| CN102095401A (en) * | 2010-12-06 | 2011-06-15 | 上海隧道工程股份有限公司 | Long-distance shield tunnel breakthrough survey method |
| CN103115605A (en) * | 2013-01-31 | 2013-05-22 | 大连市勘察测绘研究院有限公司 | Subway shaft orientated measurement method based on connected triangle |
| CN103196417A (en) * | 2013-03-18 | 2013-07-10 | 中国建筑土木建设有限公司 | Method for performing shaft orientation measurement by adopting double-connection triangle |
Non-Patent Citations (1)
| Title |
|---|
| 秦长利，等: "城市轨道交通工程测量规范", 《中华人民共和国国家标准》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767731A (en) * | 2016-11-30 | 2017-05-31 | 中国电建集团铁路建设有限公司 | A kind of connection triangle measurement apparatus and measuring method |
| CN106767731B (en) * | 2016-11-30 | 2019-06-07 | 中国电建集团铁路建设有限公司 | A kind of connection triangle measuring device and measuring method |
| CN109708624A (en) * | 2018-12-17 | 2019-05-03 | 中冶天工集团有限公司 | A kind of method that the survey of construction of structures compact district sets control net |
| CN109667591A (en) * | 2018-12-27 | 2019-04-23 | 上海市机械施工集团有限公司 | A kind of construction method of the sharp radius curve section of shield tunnel |
| CN109667591B (en) * | 2018-12-27 | 2020-10-23 | 上海市机械施工集团有限公司 | Construction method of small-radius curve segment of shield tunnel |
| CN111006639A (en) * | 2019-12-16 | 2020-04-14 | 江苏苏州地质工程勘察院 | Interval tunnel penetration measurement method |
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