CN114843941B - Subway tunnel trackless section cable bracket installation construction method - Google Patents
Subway tunnel trackless section cable bracket installation construction method Download PDFInfo
- Publication number
- CN114843941B CN114843941B CN202210776104.6A CN202210776104A CN114843941B CN 114843941 B CN114843941 B CN 114843941B CN 202210776104 A CN202210776104 A CN 202210776104A CN 114843941 B CN114843941 B CN 114843941B
- Authority
- CN
- China
- Prior art keywords
- point
- section
- line
- height
- tunnel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 238000009434 installation Methods 0.000 title claims description 22
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000012216 screening Methods 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/04—Distributing means for power supply in mines
- E21F17/06—Distributing electric power; Cable networks; Conduits for cables
-
- 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
- G01C15/002—Active optical surveying means
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/08—Installations of electric cables or lines in or on the ground or water in tunnels
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mining & Mineral Resources (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention provides a subway tunnel trackless section cable bracket mounting construction method, which comprises the following steps: the line type of the tunnel interval is determined; checking and screening the positions of the reference points; lofting the reference point; the simulation interval has a rail environment. The method has the advantages that the site checking is carried out through the position of the reference point, the subsection analysis is carried out according to the section gradient turning point, the accuracy of the measured data is ensured, the self-made simple auxiliary positioning vehicle is used for simulating the section rail operation environment, the positioning vehicle is provided with the gradienter and the laser demarcation device, and the position of the tunnel center line is accurately positioned; the bottom of the bracket is positioned on the simulated interval track positioning vehicle, so that the mounting position of the bracket can be efficiently, quickly and accurately determined.
Description
Technical Field
The invention belongs to the field of subway signal engineering construction, and particularly relates to a subway tunnel trackless section cable bracket mounting construction method.
Background
Urban rail transit is a huge system engineering, and wherein tunnel section construction space is narrow and small, and it is many to relate to the specialty, and the construction is alternately complicated between the specialty, and mutual interference is big, and current cable tray installation is based on rail face central point, carries out the bracket installation according to the high requirement of design distance rail face central point. According to the traditional construction process, the cable bracket is arranged behind the rail through, and the rail through occupies a large number of lines, the vertical crossing construction is inevitable, the construction organization is greatly restricted by other specialties, the work efficiency is not high, the progress is not controllable, and the follow-up procedure construction is severely restricted.
The Chinese patent application with publication number CN109286157A discloses a method for positioning a subway trackless section cable support, which comprises the following steps: finding the lowest point of the inner wall of the tunnel in the subway trackless section; measuring the position of the derailment plane elevation according to the found lowest point of the inner wall of the tunnel; measuring the height position of the bottom of the cable support according to the rail plane elevation position; and horizontally projecting the height position of the bottom of the cable support to the wall of the tunnel. However, the patented technology has the following disadvantages in practice:
1) two points with the same height are found on the inner walls of the left side and the right side of the shield tunnel through the transparent plastic horizontal pipes, measuring lines are led, and plumb lines are hung through the middle points of the measuring lines.
2) When measuring the position of the plane elevation of the rail, the height of the rail plane is measured from the lowest point of the tunnel, the height is not accurate, the line and slope are adjusted in actual rail laying construction, the distance between the plane of the designed graphic rail and the lowest point of the tunnel is only the schematic height, and the problem of inaccurate measurement exists.
3) When measuring the cable support bottom according to the plane elevation of rail, through promoting the projection line to the formulation height, this process spends time longer, and has the measurement deviation, easily causes the projection to the tunnel wall on inconsistent with actual support mounting height.
4) When the line projector is used for projecting to the tunnel wall, if the fixed measuring point is located at the junction of the upper slope and the lower slope of the interval, the height fixed measuring is inaccurate, and the installation of the interval bracket is not parallel to the rail plane.
Disclosure of Invention
The invention aims to provide a subway tunnel trackless section cable bracket installation construction method to solve the technical problems of low work efficiency and no guarantee of construction period caused by inaccurate measurement data during installation of a subway trackless section cable bracket.
In order to solve the technical problems, the specific technical scheme of the invention is as follows:
a subway tunnel trackless section cable bracket mounting construction method comprises the following steps:
step one, the type of a tunnel interval line is determined, and the interval line is divided into I, II type sections according to an interval design drawing: the I-shaped section, namely the running track of the train is a straight line, the height of the rail surface is floated in parallel along the ascending and descending of the section, the line center line is the center line of the rail, and the vertical height of the mounting height of the bracket and any point of the rail surface is a fixed value; the type II section, namely the train running track, is a curve, the height difference exists between the tracks, the line central line and the tunnel central line are deviated at the moment, and the vertical height between the mounting height of the bracket and the central point of the track surface is a fixed value;
checking and screening the position of the reference point, namely checking the position of the reference point on site, namely whether the reference point corresponds to the number of the shield segment rings and the coordinate mileage or not, and marking the position of the reference point; then, dividing a slope turning point and a section deformation point according to a line longitudinal section diagram provided by a track specialty, compiling a tunnel slope section table, and screening a reference point in a corresponding section as a reference point for pre-track measurement;
thirdly, lofting the datum point, and finding an elevation asH A The first leveling rod is arranged on the datum point, the second leveling rod is arranged at a lofting point on one side of the datum point, the level gauge is arranged on the other side of the datum point, the level gauge is used for measurement, and the sight height of the first leveling rod is measured to be a; the height of the sight line of the second leveling rod is measured to be b, and then the elevation of the lofting point is obtainedH B =H A +a-b; by analogy, marking a lofting point on one side of the datum point at equal intervals until each lofting point is marked, calculating the height difference between the lofting point and the rail surface according to a shield interval rail surface height table provided by the rail profession, and drawing a lofting point height difference statistical table;
and step four, simulating an interval track environment, after the type of the tunnel interval is determined in the step one, manufacturing a corresponding track plane positioning vehicle by simulating the width and the height of the track, placing a level gauge on the positioning vehicle, additionally installing a laser instrument at the center of the vehicle, and when the level gauge is in a horizontal state, determining the position of a laser line as the center position of the tunnel.
Therefore, the bracket installation is carried out through the steps, the cable bracket installation is guaranteed to be completed before the rail is communicated, the engineering quantity after the rail is communicated is greatly reduced, and the whole construction period is guaranteed. Meanwhile, trackless construction is not interfered by other specialties, cross construction is avoided, the effective time of daily construction is long, and the work efficiency is high.
Further, in the third step, the rail surface elevation provided by the rail specialty is only the tunnel center line rail surface elevation, and when the tunnel is a curve segment, the actual rail surface elevation should be the line center line rail surface elevation.
Further, in the fourth step, when the section to which the lofting point belongs is an I-shaped section, the elevation of the first lofting point is set asHThe difference in height of the rail surface isDAnd adjusting the horizontal line height of the five-line level gauge to the high level by leveling the level gauge on the positioning vehicle, wherein the line central line, the train central line and the tunnel central line are all the same line, adjusting the five-line level gauge with the telescopic bracketSAt the position of the air compressor, the air compressor is started,S=H+D(ii) a At this timeSThe height is the horizontal height of the rail surface of the same section of the first lofting point;
the top surface of the positioning trolley and a horizontal line projected by a five-line level meter are kept on the same line by adjusting the positioning trolley, and then the position of the bottom of the bracket is positioned by using a laser detector and marked; and measuring the bottom position of the bracket at the second lofting point by the same method, determining by different lofting points before and after the same method, and performing cross inspection on the measured data to ensure that the deviation of the measured position is within a controllable range.
Furthermore, when a gradient turning point exists in the I-shaped section, a sampling point needs to be selected according to a tunnel gradient table, namely, the two sampling points are selected to be the same gradient.
Furthermore, in the fourth step, when the section to which the lofting point belongs is a II-shaped section, a height difference exists between the two steel rails, that is, the outer rail is ultrahigh; at the moment, the line center line and the tunnel center line deviate; the following formula is obtained according to the similar triangle principle:
wherein the content of the first and second substances,
is the track offset;
the distance between the center of the tunnel and the plane of the rail is taken as the distance;
the outer rail is an ultra-high value;
is the track pitch.
In addition, in the step one, the track height gradually transits from 0 to H from the I-shaped section to the II-shaped section max (ii) a In order to facilitate the site construction, calculating the ultrahigh value according to the interval between the sampling points; the gentle curve is characterized by a radius of curvature R at any point on the curve'And the length of the curve from the point to the starting pointLsInversely proportional, the following equation is derived:
wherein the content of the first and second substances,
is a fixed value;
radius of the relaxation curve for the measurement point;
to moderate the curve length.
In addition, in step three, can command the chi operating personnel that found to reciprocate the scale according to the well silk reading of spirit level scale on lofting point, make well silk reading equal to the sight height of first levelling rod, second levelling rod bottom elevation flushes with the datum point promptly this moment.
Compared with the prior art, the invention has the following advantages:
1. and the site is checked through the position of the reference point, and the sectional analysis is carried out according to the section gradient turning point, so that the accuracy of the measured data is ensured.
2. The datum points are provided according to civil engineering units, datum point lofting is carried out at equal intervals, the height difference between the lofting points and the rail surface is calculated by adopting a level gauge and a leveling rod, and the mounting height position of each bracket can be accurately obtained.
3. Through research and development and improvement to the use tool, use simple and easy assistance-localization real-time car simulation interval to have the rail operation environment, the car installation spirit level of location and laser demarcation appearance, accurate positioning tunnel center line position.
4. By adopting the laser measuring instrument, the bottom of the bracket is positioned on the simulated interval track positioning vehicle, so that the mounting position of the bracket can be determined efficiently, quickly and accurately.
Drawings
FIG. 1 is a construction flow chart of the present invention;
FIG. 2 is a diagram of an exemplary fiducial point loft of the present invention;
FIG. 3 is a plot of slope section loft point selection in accordance with the present invention;
FIG. 4 is a cross-sectional view of a curvilinear section tunnel according to the present invention;
FIG. 5 is an enlarged view of a portion of the curve of the present invention;
fig. 6 is a plan view of a tunnel according to the present invention.
The notation in the figure is: 1. a level gauge; 21. a first leveling rod; 22. a second leveling rod; 3. a section bracket; 4. a rail surface; 5. a reference point; 6. and (4) putting a sample point.
Detailed Description
For a better understanding of the objects, structure and function of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.
As shown in FIG. 1, the installation and construction method of the trackless section cable bracket of the subway tunnel comprises the following steps:
step one, the type of a tunnel interval line is determined, and the interval line is divided into I, II type sections according to an interval design drawing: the I-shaped section, namely the running track of the train, is a straight line, the height of the rail surface floats in parallel along the ascending and descending of the section, the line center line is the center line of the rail, and the vertical height of the bracket mounting height and any point of the rail surface is a fixed value; the type II section, namely the train running track, is a curve, the height difference exists between the tracks, the line central line and the tunnel central line are deviated at the moment, and the vertical height of the bracket mounting height and the central point of the track surface is a fixed value.
Checking and screening the position of the reference point, namely checking the position of the reference point on site, namely whether the reference point corresponds to the number of the shield segment rings and the coordinate mileage or not, and marking the position of the reference point; then, according to a line longitudinal section diagram provided by the track specialty, a slope turning point and a section deformation point are divided, a tunnel slope section table is compiled, and a reference point in a corresponding section is screened out to be used as a reference point for measuring before the track.
And step three, lofting the datum points. As shown in FIG. 2, an elevation is found near the point to be sampledH A The reference point 5 of (1), a first leveling rod 21 is arranged on the reference point 5, a second leveling rod 22 is arranged at a lofting point 6 on one side of the reference point 5, a level 1 is arranged on the other side of the reference point 5, and the level 1 is used for measurement to measure the sight height of the first leveling rod 21 as a; the height of the second leveling rod 22 is measured as b, and then the elevation of the lofting point is obtainedH B =H A +a-b; by analogy, marking one lofting point 6 at the interval of 6 meters on one side of the datum point 5 until each lofting point 6 is marked, calculating the height difference between the lofting points and the rail surface according to a shield interval rail surface height table provided by the rail profession, and drawing a lofting point height difference statistical table. Commanding the staff to move the staff up and down according to the middle thread reading of the staff gauge on the lofting point of the level 1 to make the middle thread readThe number is equal to the height of the first leveling rod 21, i.e. the bottom height of the second leveling rod 22 is flush with the reference point. Of particular note are: the rail surface elevation provided by the rail speciality is only the tunnel central line rail surface elevation, and when the tunnel is a curve section, the actual rail surface elevation is the line central line rail surface elevation.
And step four, simulating an interval track environment. After the tunnel section type is determined through the first step, a corresponding rail plane positioning vehicle is manufactured through simulating the width and the height of a rail, a level meter is placed on the positioning vehicle, a laser instrument is additionally installed at the center of the vehicle, and when the level meter is in a horizontal state, the position of a laser line is the center position of the tunnel.
Specifically, when the section to which the lofting point belongs is an I-shaped section, the elevation of the first lofting point is set asHThe difference in height of the rail surface isDAnd adjusting the horizontal line height of the five-line level gauge to the high level by leveling the level gauge on the positioning vehicle, wherein the line central line, the train central line and the tunnel central line are all the same line, adjusting the five-line level gauge with the telescopic bracketSAt the position of the air conditioner,S=H+D(ii) a At this timeSThe height is the horizontal height of the rail surface of the same section of the first lofting point.
The installation height requirement of the design drawing of the vertical height execution engineering project from the bottom of the cable bracket to the center of the rail surface 4 in the shield interval is 1700mmAnd after the top surface of the positioning vehicle and a horizontal line projected by the five-line level meter keep the same line by adjusting the positioning vehicle, positioning the bottom position of the bracket by using a laser detector, and marking by using a marking pen. And measuring the bottom position of the bracket at the second lofting point by the same method, performing two-point line snapping by using an ink fountain, determining by using the same method through different lofting points in front and at the back, and performing cross inspection on the measured data to ensure that the deviation of the measured position is within a controllable range.
As shown in fig. 3, when there is a slope turning point in the I-shaped section, the sampling point needs to be selected according to the tunnel slope table, that is, the two sampling points should be selected to have the same slope, so as to ensure accurate positioning data of the carriage.
As shown in FIG. 4, when the section to which the sampling point belongs is a type II section, although the shield tunnel section is still circular, due to the centrifugation, the shield tunnel section is still circularThe two steel rails have a height difference due to the existence of force, namely the outer rail is ultrahigh; at the moment, the central line of the line and the central line of the tunnel deviate, and the track deviation isL。
As shown in fig. 5, according to the similar triangle decision principle: right-angled triangles with perpendicular hypotenuses being similar, triangle S 1 And S 2 Similarly, the following formula can be obtained by the principle of similar triangles:
wherein, the first and the second end of the pipe are connected with each other,
is the track offset;
the distance between the center of the tunnel and the plane of the rail is taken as the distance;
the value is the outer rail ultrahigh value;
is the track pitch.
According to the principle that the edge of a circle is composed of infinite line segments with infinite short lengths, the method can be knownRThe value is fixed and will not change with the movement of the track, as shown in the design diagramRValue of 1800mm。DFor the track spacing, i.e. the distance between two rails, the gauge is known from the International railway Association's definition of standard railsDIs 1435mm。HFor track super-high values, the track offset can be obtainedL=1.25H. Track super high valueH=11.8V²/RAs can be seen from fig. 6, the first,Rin order to obtain a turning radius,Vfor the running speed of the train, it is knownL=14.75V²H/R。
Considering the existence of the gentle curve, the track superelevation is gradually transited from 0 to H from the I-type section to the II-type section max . For convenience of on-site construction, the method is as followsThe super high value is calculated at a section of 6 meters. The characteristics of the easement curve are that the curvature radius R' of any point on the curve is inversely proportional to the length Ls of the curve from the point to the starting point, and the following formula is obtained:
wherein the content of the first and second substances,
is a fixed value;
radius of the relaxation curve for the measurement point;
to moderate the curve length.
By substituting any point data into the above equation, the radius of the relaxation curve at the measurement point can be obtained from FIG. 6
The track offset can be obtainedL(ii) a Because the central line of the tunnel is determined, the positioning vehicle can be moved to parallelly shift towards the direction of the outer rail by using the central line of the tunnel as an initial position through the angle squareLThe installation position of the bracket of the curve section can be determined by one unit, the specific method is the same as that of a straight line section, and the center of the positioning vehicle is positioned on the central line of the line.
The method mainly simulates the interval rail operating environment through the development of a measuring device, advances the construction content under the rail condition to the trackless condition for construction, and realizes the one-time in-place installation of the trackless section cable bracket through the accurate calculation of measurement, the quick and accurate implementation of field determination and the follow-up staring control of installation; the construction method starts from actual requirements, improves construction efficiency by comprehensively decomposing and controlling procedures related to the installation of the cable bracket and independently researching and developing the measuring device, achieves the installation of the trackless section in place at one time, saves cost, improves construction efficiency and ensures engineering quality and safety.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. A subway tunnel trackless section cable bracket mounting construction method is characterized by comprising the following steps:
the method comprises the steps of firstly, determining the type of a tunnel section line, and dividing the section line into an I-type section and a II-type section according to a section design drawing, wherein the I-type section, namely a train running track, is a straight line, the height of a rail surface floats in parallel along the ascending and descending of the section, the line central line is a rail central line, and the vertical height of a bracket mounting height and any point of the rail surface is a fixed value; the type II section, namely the running track of the train, is a curve, the height difference exists between the rails, the line central line and the tunnel central line are deviated at the moment, and the vertical height of the mounting height of the bracket and the central point of the rail surface is a fixed value;
checking and screening the position of the reference point, namely checking the position of the reference point on site, namely whether the reference point corresponds to the number of the shield segment rings and the coordinate mileage or not, and marking the position of the reference point; then dividing a slope turning point and a section deformation point according to a line longitudinal section diagram provided by a track professional, compiling a tunnel slope section table, and screening a reference point in a corresponding section as a reference point for pre-track measurement;
step three, lofting the datum points, and finding an elevation asH A The reference point (5) is provided with a first leveling rod (21), a second leveling rod (22) is arranged at a lofting point (6) at one side of the reference point (5), and water is arranged at the other side of the reference point (5)The leveling instrument (1) is used for measurement, the height of a sight line of the first leveling rod (21) is measured as a, the height of a sight line of the second leveling rod (22) is measured as b, and the elevation of a lofting point is obtained at the momentH B =H A +a-b(ii) a By analogy, marking a lofting point (6) on one side of the reference point (5) at equal intervals until each lofting point (6) is marked, calculating the height difference of the lofting points from the rail surface according to a shield interval rail surface height table provided by the track specialty, and drawing a lofting point height difference statistical table;
and step four, simulating an interval track environment, after the tunnel interval type is determined in the step one, manufacturing a corresponding track plane positioning vehicle by simulating the width and the height of the track, placing a level gauge on the positioning vehicle, additionally installing a laser gauge at the center of the vehicle, and when the level gauge is in a horizontal state, determining the position of a laser line as the center position of the tunnel.
2. The installation and construction method of the cable bracket for the trackless section of the subway tunnel according to claim 1, wherein in the third step, the rail surface elevation provided by the rail speciality is only the rail surface elevation of the center line of the tunnel, and when the tunnel is a curved section, the actual rail surface elevation is the rail surface elevation of the center line of the line.
3. The method for installing and constructing the cable bracket for the trackless section of the subway tunnel according to claim 1, wherein in the fourth step, when the section to which the lofting point belongs is an I-shaped section, the elevation of the first lofting point is set asHThe difference in height of the rail surface isDAnd adjusting the horizontal line height of the five-line level gauge to the high level by leveling the level gauge on the positioning vehicle, wherein the line central line, the train central line and the tunnel central line are all the same line, adjusting the five-line level gauge with the telescopic bracketSAt the position of the air compressor, the air compressor is started,S=H+D(ii) a At this timeSThe height is the horizontal height of the rail surface of the same section of the first lofting point;
keeping the top surface of the positioning vehicle and a horizontal line projected by a five-line level meter on the same line by adjusting the positioning vehicle, positioning the bottom position of the bracket by using a laser detector, and marking; and measuring the bottom position of the bracket at the second lofting point by the same method, determining by different lofting points before and after the same method, and performing cross inspection on the measured data to ensure that the deviation of the measured position is within a controllable range.
4. A subway tunnel trackless section cable bracket installation and construction method according to claim 3, characterized in that when there is a slope turning point in the I-shaped section, a lofting point needs to be selected according to a tunnel slope table, namely, the two lofting points should be selected to have the same slope.
5. The subway tunnel trackless section cable bracket installation construction method according to claim 1, wherein in the fourth step, when the section to which the sampling point belongs is a II-type section, a height difference exists between two steel rails, that is, the outer rail is ultrahigh; at the moment, the line center line and the tunnel center line deviate; the following formula is obtained according to the similar triangle principle:
wherein, the first and the second end of the pipe are connected with each other,
is the track offset;
the distance between the center of the tunnel and the plane of the rail is taken as the distance;
the value is the outer rail ultrahigh value;
is the track pitch.
6. Subway tunnel trackless section cable bracket installation constructor according to any one of claims 1-5The method is characterized in that in the step one, the track height is gradually transited from 0 to H from the I-shaped section to the II-shaped section max (ii) a In order to facilitate the site construction, calculating the ultrahigh value according to the interval between the sampling points; the gentle curve is characterized by a radius of curvature R at any point on the curve'And the length of the curve from the point to the starting pointLsInversely proportional, the following equation is derived:
wherein the content of the first and second substances,
is a fixed value;
radius of the relaxation curve for the measurement point;
to moderate the curve length.
7. A subway tunnel trackless section cable carriage installation and construction method according to any one of claims 1-5, characterized in that in the third step, according to the central thread reading of the staff on the lofting point of the leveling instrument (1), the staff is instructed to move the staff up and down the staff so that the central thread reading is equal to the sight height of the first leveling rod (21), namely, the bottom height of the second leveling rod (22) is flush with the datum point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210776104.6A CN114843941B (en) | 2022-07-04 | 2022-07-04 | Subway tunnel trackless section cable bracket installation construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210776104.6A CN114843941B (en) | 2022-07-04 | 2022-07-04 | Subway tunnel trackless section cable bracket installation construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114843941A CN114843941A (en) | 2022-08-02 |
| CN114843941B true CN114843941B (en) | 2022-09-09 |
Family
ID=82574836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210776104.6A Active CN114843941B (en) | 2022-07-04 | 2022-07-04 | Subway tunnel trackless section cable bracket installation construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114843941B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076009A (en) * | 2013-01-06 | 2013-05-01 | 长安大学 | Fast lofting method for connecting points of overhead line system of railway tunnel and automatic measuring system |
| CN109286157A (en) * | 2018-11-30 | 2019-01-29 | 中铁二局集团电务工程有限公司 | A kind of subway trackless section cable bearer localization method |
| JP2019158637A (en) * | 2018-03-14 | 2019-09-19 | 西松建設株式会社 | Tunnel construction management system and determination method |
| CN110375711A (en) * | 2019-07-17 | 2019-10-25 | 中铁十二局集团有限公司 | Ring network trackless measurement construction method in a kind of subway tunnel |
| CN112528386A (en) * | 2020-12-31 | 2021-03-19 | 中铁建电气化局集团第三工程有限公司 | Trackless accurate measurement method for suspension point position of contact network in subway tunnel |
| CN113237468A (en) * | 2021-04-22 | 2021-08-10 | 中国建筑第五工程局有限公司 | Rapid measurement device for mounting of track interval bracket and measurement rechecking method |
| CN113405525A (en) * | 2021-08-19 | 2021-09-17 | 中国铁建电气化局集团第五工程有限公司 | Device of subway shield interval communication system and support positioning method |
-
2022
- 2022-07-04 CN CN202210776104.6A patent/CN114843941B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076009A (en) * | 2013-01-06 | 2013-05-01 | 长安大学 | Fast lofting method for connecting points of overhead line system of railway tunnel and automatic measuring system |
| JP2019158637A (en) * | 2018-03-14 | 2019-09-19 | 西松建設株式会社 | Tunnel construction management system and determination method |
| CN109286157A (en) * | 2018-11-30 | 2019-01-29 | 中铁二局集团电务工程有限公司 | A kind of subway trackless section cable bearer localization method |
| CN110375711A (en) * | 2019-07-17 | 2019-10-25 | 中铁十二局集团有限公司 | Ring network trackless measurement construction method in a kind of subway tunnel |
| CN112528386A (en) * | 2020-12-31 | 2021-03-19 | 中铁建电气化局集团第三工程有限公司 | Trackless accurate measurement method for suspension point position of contact network in subway tunnel |
| CN113237468A (en) * | 2021-04-22 | 2021-08-10 | 中国建筑第五工程局有限公司 | Rapid measurement device for mounting of track interval bracket and measurement rechecking method |
| CN113405525A (en) * | 2021-08-19 | 2021-09-17 | 中国铁建电气化局集团第五工程有限公司 | Device of subway shield interval communication system and support positioning method |
Non-Patent Citations (1)
| Title |
|---|
| 盾构区间隧道中心平面坐标的计算方法;黄小斌等;《测绘科学》;20101120(第06期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114843941A (en) | 2022-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109515252B (en) | Trackless measurement construction method for subway contact network | |
| FI80790B (en) | FOERFARANDE OCH ANORDNING FOER BESTAEMNING AV ETT SPAORS LAEGE. | |
| CN102147252A (en) | Method for determining strut positions of contact network of special railway line for passenger traffic | |
| CN206876125U (en) | A kind of clearance survey device for subway engineering | |
| CN103076009B (en) | Fast lofting method for connecting points of overhead line system of railway tunnel and automatic measuring system | |
| CN108225286B (en) | Pose estimation method for mobile station vehicle-mounted total station | |
| CN101768904B (en) | Measurement and installation method of plate-type ballastless track primary standard | |
| CN113212491A (en) | Station setting measurement method for evaluating smoothness of track line | |
| CN114843941B (en) | Subway tunnel trackless section cable bracket installation construction method | |
| CN103276644A (en) | Rail traffic catenary system and conductor rail measuring method based on rail foundation pile control network | |
| CN110497931A (en) | A kind of trouble area track condition detection method | |
| CN202420477U (en) | Triaxial perpendicular topographical change measuring device | |
| CN207600398U (en) | A kind of tunnel absolute altitude and distance measurement instrument | |
| CN212692878U (en) | Urban rail transit contact net trackless measuring equipment | |
| CN103983256B (en) | A kind of contact network in tunnel casts anchor construction survey method | |
| CN102322854B (en) | Tunnel monitoring measuring point and TSP (Total Suspended Particulate) blasthole layout device and method | |
| CN109696131B (en) | Trackless measuring method for suspension positioning point of suspension contact network of urban rail transit | |
| CN109286157B (en) | Subway trackless section cable support positioning method | |
| CN105648861B (en) | A kind of railway track measurement locating mark points method | |
| CN108343448A (en) | A kind of method that arbitrary cross-section posture in tunnel determines | |
| CN109405708B (en) | Cutter head of shield machine, cutter abrasion measurement rotating ruler, measurement system and measurement method | |
| CN109778617B (en) | Subway interval lateral platform trackless construction method | |
| CN106949886B (en) | Rapid positioning device and positioning method for subway tunnel engineering line measuring point positions | |
| CN103344214A (en) | 1.6-degree parabolic extralarge pier measuring and pier body linear control method | |
| CN108645310B (en) | Parameter measurement device for evacuation platform girder steel in subway tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |