CN114894160A - Low-clearance tunnel bow-shaped cantilever pre-configuration data detection device and method - Google Patents
Low-clearance tunnel bow-shaped cantilever pre-configuration data detection device and method Download PDFInfo
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- G—PHYSICS
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- G01B5/061—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness height gauges
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- G—PHYSICS
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention provides a device and a method for detecting the pre-configuration data of an arched cantilever of a low-clearance tunnel, belonging to the technical field of the pre-configuration of the arched cantilever, and comprising a simulated tunnel top, a tunnel top support, a bottom foundation, a limit ruler, an adjusting platform, a simulated steel rail and a pull-out value height guide detection mechanism; the two sides of the simulated tunnel top are connected with the top end of the tunnel top support, the simulated tunnel top is provided with an installation seat, and the bottom end of the tunnel top support is installed on the bottom foundation; the limiting ruler is placed on the bottom foundation; the adjusting platform comprises an upper layer platform, a lower layer platform, a limit adjusting mechanism and an ultrahigh adjusting mechanism, the lower layer platform is placed on the bottom foundation, the limit adjusting mechanism is used for moving the upper layer platform and the lower layer platform along a limit ruler, and the ultrahigh adjusting mechanism is used for adjusting the height of an adjusting side of the upper layer platform; the simulated steel rail and the pull-out value height guide detection mechanism are both arranged on the upper platform. After the device is adopted, the pre-configuration data can be detected at any time during the pre-configuration period, and the qualification rate of the ex-warehouse pre-configuration cantilever is improved.
Description
Technical Field
The invention belongs to the technical field of bow-shaped cantilever prearrangement, and particularly discloses a device and a method for detecting low-clearance tunnel bow-shaped cantilever prearrangement data.
Background
Along with the development of railway electrification construction, the requirement on the installation accuracy of the contact network cantilever is higher and higher, the advantages of the factory-like pre-assembled cantilever are more and more obvious, materials can be greatly saved, the construction efficiency is improved, the construction process is optimized, and the construction progress is accelerated. However, the factory pre-assembled cantilever is in assembly line operation, the pre-assembly speed is high, and an assembler can easily mistake the provided pre-assembled data or mark the pre-assembled data or cause the pre-assembled bow-shaped cantilever to be unqualified due to operation errors and the like.
The single-line tunnel clearance is little, and safe distance is little, and bow-shaped cantilever mounting height is high, and when the pre-prepared cantilever is gone out of the warehouse to the scene, after messenger wire and contact wire exhibition were accomplished, change the bow-shaped cantilever that has atress again, the procedure is complicated, and efficiency is lower, makes mistakes easily, but also can influence the safety of site operation personnel and cause.
Disclosure of Invention
The invention provides a device and a method for detecting pre-configuration data of an arched cantilever of a low-clearance tunnel.
The invention provides a low clearance tunnel bow-shaped cantilever preset data detection device, which comprises a simulation tunnel top, a tunnel top support, a bottom foundation, a limit ruler, an adjusting platform, a simulation steel rail and a pull-out value lead-height detection mechanism, wherein the simulation tunnel top is connected with the bottom foundation through a pull-out value lead-height detection mechanism; the two sides of the simulated tunnel top are connected with the top end of the tunnel top support, the simulated tunnel top is provided with an installation seat, the installation seat is provided with reserved holes for being connected with the arched cantilever base, a plurality of groups of reserved holes are distributed from high to low, and the bottom end of the tunnel top support is installed on the bottom foundation; the limiting ruler is placed on the bottom foundation and is vertical to the central line of the line, and the starting point end of the limiting ruler is positioned on the plumb line of the preformed hole connected with the bow-shaped cantilever base; the adjusting platform comprises an upper platform, a lower platform, a limiting adjusting mechanism and an ultrahigh adjusting mechanism, wherein the lower platform is placed on the bottom foundation, the upper platform and the lower platform are respectively provided with a hinged side and an adjusting side which are positioned on two sides of a line central line, the hinged sides of the upper platform and the lower platform are connected through hinges, the adjusting side of the lower platform is connected with the limiting adjusting mechanism, the limiting adjusting mechanism is used for moving the upper platform and the lower platform along a limiting ruler, the adjusting side of the upper platform is connected with the ultrahigh adjusting mechanism, and the ultrahigh adjusting mechanism is used for adjusting the height of the adjusting side of the upper platform; the simulated steel rail and the pull-out value height guide detection mechanism are both arranged on the upper platform, and the simulated steel rail is perpendicular to the measured bow-shaped cantilever.
Further, the limit adjusting mechanism comprises a limit adjusting screw and a limit adjusting nut; the ultrahigh adjusting mechanism comprises an ultrahigh adjusting screw and an ultrahigh adjusting nut; the limit adjusting screw is fixed on the bottom foundation and is parallel to the limit ruler; the limit adjusting nut is sleeved on the limit adjusting screw rod; the ultrahigh adjusting screw is vertical to the limit adjusting screw and is rotationally connected with the limit adjusting nut; the ultrahigh adjusting nut is sleeved on the ultrahigh adjusting screw and is rotationally connected with the adjusting side of the upper platform.
Further, the pull-out value height guide detection mechanism is a laser contact net measuring instrument.
Furthermore, a high-strength steel plate is adopted at the top of the simulation tunnel, and a reinforcing structure is welded at the base of the fixed arch-shaped cantilever; the tunnel top support adopts a circular steel tube, the top end of the circular steel tube is welded with the top of the simulated tunnel, and the bottom end of the circular steel tube is welded with the bottom foundation; the simulated steel rail is made of square steel, and the distance between the two simulated steel rails is 1435 mm.
The invention provides a low clearance tunnel bow-shaped cantilever preset data detection method, which is used for judging the head lowering/head raising phenomenon of a detected bow-shaped cantilever and is implemented by adopting the low clearance tunnel bow-shaped cantilever preset data detection device, and comprises the following steps:
s1, mounting the tested bow-shaped cantilever
According to the installation site data of the measured bow-shaped cantilever, the height of the adjusting side of the upper platform is adjusted through the superelevation adjusting mechanism, so that the superelevation of the simulated steel rail is adjusted;
moving the upper layer platform and the lower layer platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the preformed hole and the simulated steel rail;
mounting the bow-shaped cantilever base and the telescopic adjusting rod on preformed holes with different heights, and adjusting the mounting height of the tested bow-shaped cantilever;
installing an insulator, a tested bow-shaped cantilever, a messenger wire seat and a positioning wire clamp according to design requirements, and adopting round steel to replace a bearing lead to be installed at the messenger wire seat and the positioning wire clamp;
s2, measuring the levelness of the bow-shaped cantilever by using a level ruler, wherein the slope of head lowering or head raising is not more than 50 mm/m;
when the head is lowered or raised, the tested arched cantilever is adjusted to be horizontal by adjusting the length of the telescopic adjusting rod, and if the length of the telescopic adjusting rod cannot be adjusted to be within the range of design requirements, the reason is searched and the problem is solved, and then the pre-configuration work of the arched cantilever with large area is carried out.
The invention provides a low clearance tunnel bow-shaped cantilever preset data detection method, which is used for detecting a pull-out value and a lead height and is implemented by adopting the low clearance tunnel bow-shaped cantilever preset data detection device, and the method comprises the following steps:
s1, mounting the tested bow-shaped cantilever
According to the installation field data of the measured bow-shaped cantilever, the height of the adjusting side of the upper platform is adjusted through the superelevation adjusting mechanism, so that the superelevation of the simulated steel rail is adjusted;
moving the upper layer platform and the lower layer platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the preformed hole and the simulated steel rail;
mounting the bow-shaped cantilever base and the telescopic adjusting rod on preformed holes with different heights, and adjusting the mounting height of the tested bow-shaped cantilever;
installing an insulator, a tested bow-shaped cantilever, a messenger wire seat and a positioning wire clamp according to design requirements, and adopting round steel to replace a bearing lead to be installed at the messenger wire seat and the positioning wire clamp;
s2, measuring the simulated lead height and the simulated pull-out value of the carrier cable seat and the positioning wire clamp through the pull-out value lead height detection mechanism, measuring the simulated installation height of the arched cantilever base through the tape measure, wherein the actual lead height of the carrier cable seat is the designed installation height of the arched cantilever base, the simulated installation height of the arched cantilever base and the simulated lead height of the carrier cable seat, and the actual lead height of the positioning wire clamp is the designed installation height of the arched cantilever base, the simulated installation height of the arched cantilever base and the simulated lead height of the positioning wire clamp, and judging whether the actual lead heights of the carrier cable seat and the positioning wire clamp meet the design requirements or not, if not meeting the search reason and solving the problem;
the simulated pull-out value is an actual pull-out value, and whether the actual pull-out value meets the design requirement value is judged, if not, the searching reason is not met and solved;
and after the actual lead height and the actual pull-out value both accord with the design requirement values, performing large-area wrist-arm device pre-configuration work.
The invention provides a low clearance tunnel bow-shaped cantilever preset data detection method, which is used for detecting a safe distance of a tested bow-shaped cantilever on the basis of meeting the requirements of leading height and qualified pulling values, is implemented by adopting the low clearance tunnel bow-shaped cantilever preset data detection device and comprises the following steps:
s1, mounting the tested bow-shaped cantilever
According to the installation site data of the measured bow-shaped cantilever, the height of the adjusting side of the upper platform is adjusted through the superelevation adjusting mechanism, so that the superelevation of the simulated steel rail is adjusted;
moving the upper layer platform and the lower layer platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the preformed hole and the simulated steel rail;
mounting the bow-shaped cantilever base and the telescopic adjusting rod on preformed holes with different heights, and adjusting the mounting height of the tested bow-shaped cantilever;
installing an insulator, a tested bow-shaped cantilever, a messenger wire seat and a positioning wire clamp according to design requirements, and adopting round steel to replace a bearing lead to be installed at the messenger wire seat and the positioning wire clamp;
and S2, on the basis that the measured arched cantilever meets the guiding height and the pull-out value is qualified, measuring the safe distance from the measured arched cantilever to the top of the simulated tunnel by using a measuring tape, and if the safe distance meets the design requirement, searching the reason and solving the problem, and then performing large-area pre-configuration work on the arched cantilever.
The invention has the following beneficial effects:
by adopting the device and the method for detecting the pre-configuration data of the arched cantilever of the low-clearance tunnel, the pre-configuration data can be detected at any time during the pre-configuration period, the qualification rate of the pre-configuration cantilever out of a warehouse is improved, the reject ratio of a subsequent construction site is reduced, a large amount of reworking is avoided, and the construction efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a diagram of a usage state of an arcuate cantilever preset data detection device of a low clearance tunnel;
FIG. 2 is an enlarged view of the upper portion of FIG. 1;
FIG. 3 is an enlarged view of the lower portion of FIG. 1;
fig. 4 is a schematic structural diagram of the mounting seat.
Icon: the device comprises a simulated tunnel roof 1, a tunnel roof support 2, a bottom foundation 3, a limit ruler 4, a simulated steel rail 5, a mounting seat 6, a reserved hole 6.1, an upper-layer platform 7, a lower-layer platform 8, a hinge 9, a limit adjusting screw 10, a limit adjusting nut 11, an ultrahigh adjusting screw 12, an ultrahigh adjusting nut 13, a laser contact network measuring instrument 14, an arched cantilever base 101, a measured arched cantilever 102, a telescopic adjusting rod 103, an insulator 104, a messenger wire seat 105 and a positioning wire clamp 106.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a low clearance tunnel bow-shaped cantilever preset data detection device, which comprises a simulated tunnel top 1, a tunnel top support 2, a bottom foundation 3, a limit ruler 4, an adjusting platform, a simulated steel rail 5 and a pull-out value height guiding detection mechanism; the two sides of the simulated tunnel top 1 are connected with the top end of the tunnel top support 2, the simulated tunnel top 1 is provided with a mounting seat 6, the mounting seat 6 is provided with reserved holes 6.1 used for being connected with the arched cantilever base 101, a plurality of groups of reserved holes 6.1 are distributed from high to low, and the bottom end of the tunnel top support 2 is installed on the bottom foundation 3; the limit ruler 4 is placed on the bottom foundation 3 and is vertical to the line central line 200, and the starting point end of the limit ruler 4 is positioned on the plumb line of the preformed hole 6.1 connected with the bow-shaped cantilever base 101; the adjusting platform comprises an upper layer platform 7, a lower layer platform 8, a limit adjusting mechanism and an ultrahigh adjusting mechanism, wherein the lower layer platform 8 is placed on the bottom foundation 3, the two sides of the line central line 200 of the upper layer platform 7 and the lower layer platform 8 are respectively a hinged side and an adjusting side, the hinged sides of the upper layer platform 7 and the lower layer platform 8 are connected through a hinge 9, the adjusting side of the lower layer platform 7 is connected with the limit adjusting mechanism, the limit adjusting mechanism is used for moving the upper layer platform 7 and the lower layer platform 8 along a limit ruler 4, the adjusting side of the upper layer platform 7 is connected with the ultrahigh adjusting mechanism, and the ultrahigh adjusting mechanism is used for adjusting the height of the adjusting side of the upper layer platform 7; the simulated steel rail 5 and the pull-out value height guide detection mechanism are both arranged on the upper-layer platform 7, and the simulated steel rail 5 is perpendicular to the measured bow-shaped cantilever 102.
The installation position of the installation seat 6 is determined according to the actual installation height of the arched cantilever base 101 and the radian of the tunnel, and the horizontal distance from the installation position of the arched cantilever base 101 to the line central line 200 is ensured to be consistent with the vertical height from the arch top 1 of the simulated tunnel.
Further, the limit adjusting mechanism includes a limit adjusting screw 10 and a limit adjusting nut 11; the ultrahigh adjusting mechanism comprises an ultrahigh adjusting screw 12 and an ultrahigh adjusting nut 13; the limit adjusting screw 10 is fixed on the bottom foundation 3 and is parallel to the limit ruler 4; the limit adjusting nut 11 is sleeved on the limit adjusting screw 10; the ultrahigh adjusting screw 12 is perpendicular to the limiting adjusting screw 10 and is rotationally connected with the limiting adjusting nut 11; the ultrahigh adjusting nut 13 is sleeved on the ultrahigh adjusting screw 12 and is rotatably connected with the adjusting side of the upper platform 7. The limit adjusting nut 11 is rotated to move along the limit adjusting screw 10, so that the ultrahigh adjusting screw 12, the ultrahigh adjusting nut 13 and the upper platform 7 connected with the ultrahigh adjusting nut 13 can be driven to move, the adjusting table can move along the limit ruler 4, and the limit between the reserved hole 6.1 and the simulated steel rail 5 can be adjusted. The lower-layer platform 8 is fixedly connected with the ultrahigh adjusting screw 12 so as to ensure the connecting strength between the ultrahigh adjusting mechanism and the adjusting platform. The superelevation adjusting nut 13 is rotated to move along the superelevation adjusting screw 12, so that the adjusting side of the upper platform 7 can be driven to rotate by taking the hinge 9 as a rotating shaft, and the superelevation of the simulated steel rail 5 is adjusted.
Further, the pull-out value lead-up detection mechanism is a laser contact net measuring instrument 14.
Further, the simulated tunnel roof 1 is made of a high-strength steel plate, and the vault radian of the steel plate is in a form of an actual arc line of the tunnel 1: 1, simulating construction, namely welding a reinforcing structure at a fixed arched cantilever base 101; the tunnel top support 2 is made of a round steel pipe, the height of the round steel pipe is 1m, the top end of the round steel pipe is welded with the simulated tunnel top 1, and the bottom end of the round steel pipe is welded with the bottom foundation 3; the simulated steel rails 5 are made of square steel, and the distance between the two simulated steel rails 5 is 1435 mm.
Example 2
The embodiment provides a low headroom tunnel bow-shaped cantilever pre-configuration data detection method, which is used for judging a head-lowering/head-raising phenomenon of a detected bow-shaped cantilever 102, and is implemented by adopting the low headroom tunnel bow-shaped cantilever pre-configuration data detection device in the embodiment 1, the height, the limit and the like of a bow-shaped cantilever base 101 are determined according to a single-line low headroom tunnel structure, the connection installation relationship between the bow-shaped cantilever device (comprising the bow-shaped cantilever base 101, a telescopic adjusting rod 103, an insulator 104, the detected bow-shaped cantilever 102, a messenger wire seat 105 and a positioning wire clamp 106) and a field tunnel and a rail surface is further simulated, the detected bow-shaped cantilever 102 can be kept horizontal by adjusting the telescopic adjusting rod 103, and whether the detected bow-shaped cantilever 102 has an obvious head-raising/head-raising phenomenon or not still needs to be judged after the adjustment is completed.
The method comprises the following steps:
s1, mounting the tested bow-shaped cantilever
According to the installation site data of the measured bow-shaped cantilever 102, the height of the adjusting side of the upper platform 7 is adjusted through the superelevation adjusting mechanism, so that the superelevation of the simulated steel rail 5 is adjusted;
moving the upper layer platform 7 and the lower layer platform 8 along the limit ruler 4 through a limit adjusting mechanism, so as to adjust the limit between the reserved hole 6.1 and the simulated steel rail 7;
the bow-shaped cantilever base 101 and the telescopic adjusting rod 103 are arranged on the preformed holes 6.1 with different heights, and the installation height of the tested bow-shaped cantilever 102 is adjusted;
installing an insulator 104, a tested bow-shaped cantilever 102, a messenger wire seat 105 and a positioning wire clamp 106 according to design requirements, and adopting round steel to replace a bearing lead to be installed at the messenger wire seat 105 and the positioning wire clamp 106;
s2, measuring the levelness of the bow-shaped cantilever 102 to be measured by adopting a level ruler, wherein the slope of head lowering or head raising is not more than 50 mm/m;
when the head is lowered or raised, the length of the telescopic adjusting rod 103 is adjusted to level the measured arched cantilever 102, if the head cannot be adjusted to the range of the design requirement, the reason is found, whether the measurement, calculation or pre-preparation link is a problem, and after the problem is solved, the pre-preparation work of the arched cantilever with a large area is carried out.
Example 3
The embodiment provides a detection method for bow-shaped cantilever preset data of a low clearance tunnel, which is used for detecting a pull-out value and a lead-out height, and is implemented by adopting the detection device for bow-shaped cantilever preset data of the low clearance tunnel, the measurement data of a support limit of a railway installation site is simulated by adjusting the horizontal distance between the central position of a simulated steel rail 5 (namely the central origin of the simulated steel rail 5) and a reserved hole 6.1, then a contact net laser measuring instrument 14 measures the pull-out value, the lead-out height data needs to be converted into actual data, and then the actual data is compared with a design theoretical value, and whether the bow-shaped cantilever 102 to be measured is qualified or not is judged.
The method comprises the following steps:
s1, mounting the tested bow-shaped cantilever
According to the installation site data of the measured bow-shaped cantilever 102, the height of the adjusting side of the upper platform 7 is adjusted through the superelevation adjusting mechanism, so that the superelevation of the simulated steel rail 5 is adjusted;
moving the upper layer platform 7 and the lower layer platform 8 along the limit ruler 4 through a limit adjusting mechanism, so as to adjust the limit between the reserved hole 6.1 and the simulated steel rail 7;
the bow-shaped cantilever base 101 and the telescopic adjusting rod 103 are arranged on the preformed holes 6.1 with different heights, and the installation height of the tested bow-shaped cantilever 102 is adjusted;
installing an insulator 104, a tested bow-shaped cantilever 102, a messenger wire seat 105 and a positioning wire clamp 106 according to design requirements, and adopting round steel to replace a bearing lead to be installed at the messenger wire seat 105 and the positioning wire clamp 106;
s2, measuring the simulated lead height and the simulated pull-out value of the carrier cable seat 105 and the positioning clamp 106 by the pull-out value lead height detection mechanism, measuring the simulated installation height of the bow-shaped cantilever base 101 by the tape measure, where the actual lead height of the carrier cable seat 105 is the designed installation height of the bow-shaped cantilever base 101 + the simulated installation height of the bow-shaped cantilever base 101-the simulated lead height of the carrier cable seat 105, and the actual lead height of the positioning clamp 106 is the designed installation height of the bow-shaped cantilever base 101 + the simulated installation height of the bow-shaped cantilever base 101-the simulated lead height of the positioning clamp 106, and determining whether the actual lead heights of the carrier cable seat 105 and the positioning clamp 106 meet the design requirements, if not meeting the search reason, whether the measurement, calculation or pre-configuration link has a problem occurs, and solving the problem; the simulation pull-out value is an actual pull-out value, whether the actual pull-out value meets the design requirement value or not is judged, if the actual pull-out value does not meet the search reason, the problem occurs in the measuring, calculating or pre-configuration link, and the problem is solved;
and after the actual lead height and the actual pull-out value both accord with the design requirement values, performing large-area wrist-arm device pre-configuration work.
Example 4
The embodiment provides a low-clearance tunnel bow-shaped cantilever preset data detection method, which is used for detecting a safe distance of a tested bow-shaped cantilever on the basis of meeting the requirements of height guidance and qualified pull-out values.
The method comprises the following steps:
s1, mounting the tested bow-shaped cantilever
According to the installation site data of the measured bow-shaped cantilever 102, the height of the adjusting side of the upper platform 7 is adjusted through the superelevation adjusting mechanism, so that the superelevation of the simulated steel rail 5 is adjusted;
moving the upper layer platform 7 and the lower layer platform 8 along the limit ruler 4 through a limit adjusting mechanism, so as to adjust the limit between the reserved hole 6.1 and the simulated steel rail 7;
the bow-shaped cantilever base 101 and the telescopic adjusting rod 103 are arranged on the preformed holes 6.1 with different heights, and the installation height of the tested bow-shaped cantilever 102 is adjusted;
installing an insulator 104, a tested bow-shaped cantilever 102, a messenger wire seat 105 and a positioning wire clamp 106 according to design requirements, and adopting round steel to replace a bearing lead to be installed at the messenger wire seat 105 and the positioning wire clamp 106;
s2, on the basis that the measured arched cantilever 102 meets the leading height and the pull-out value is qualified, the tape measure is used for measuring the safety distance from the measured arched cantilever 102 to the simulated tunnel roof 1, whether the design requirements are met or not is the problem in the measuring, calculating or pre-preparation links if the design requirements are not met or the reason is found, and after the problem is solved, large-area pre-preparation work of the arched cantilever is carried out.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A low clearance tunnel bow-shaped cantilever prearranged data detection device is characterized by comprising a simulated tunnel top, a tunnel top support, a bottom foundation, a limit ruler, an adjusting platform, a simulated steel rail and a pull-out value height guide detection mechanism;
the two sides of the simulated tunnel top are connected with the top end of the tunnel top support, the simulated tunnel top is provided with an installation seat, the installation seat is provided with reserved holes used for being connected with the bow-shaped cantilever base, a plurality of groups of reserved holes are distributed from high to low, and the bottom end of the tunnel top support is installed on the bottom foundation;
the limiting ruler is placed on the bottom foundation and is vertical to the central line of the line, and the starting point end of the limiting ruler is positioned on the plumb line of the preformed hole connected with the bow-shaped cantilever base;
the adjusting platform comprises an upper layer platform, a lower layer platform, a limiting adjusting mechanism and an ultrahigh adjusting mechanism, wherein the lower layer platform is placed on the bottom foundation, the upper layer platform and the lower layer platform are respectively provided with a hinged side and an adjusting side which are positioned at two sides of a line central line, the hinged sides of the upper layer platform and the lower layer platform are connected through hinges, the adjusting side of the lower layer platform is connected with the limiting adjusting mechanism, the limiting adjusting mechanism is used for moving the upper layer platform and the lower layer platform along a limiting ruler, the adjusting side of the upper layer platform is connected with the ultrahigh adjusting mechanism, and the ultrahigh adjusting mechanism is used for adjusting the height of the adjusting side of the upper layer platform;
the simulated steel rail and the pull-out value height-guiding detection mechanism are both arranged on the upper-layer platform, and the simulated steel rail is perpendicular to the measured bow-shaped cantilever.
2. The low clearance tunnel arcuate cantilever provision data detection device of claim 1, wherein the clearance adjustment mechanism comprises a clearance adjustment screw and a clearance adjustment nut;
the ultrahigh adjusting mechanism comprises an ultrahigh adjusting screw and an ultrahigh adjusting nut;
the limit adjusting screw is fixed on the bottom foundation and is parallel to the limit ruler;
the limit adjusting nut is sleeved on the limit adjusting screw rod;
the ultrahigh adjusting screw is perpendicular to the limit adjusting screw and is rotationally connected with the limit adjusting nut;
and the ultrahigh adjusting nut is sleeved on the ultrahigh adjusting screw rod and is rotationally connected with the adjusting side of the upper-layer platform.
3. The low clearance tunnel bow cantilever provisioning data detection device of claim 2, wherein the pull-out value lead height detection mechanism is a laser contact net gauge.
4. The low clearance tunnel bow-shaped cantilever preset data detection device of claim 3, wherein the simulated tunnel roof is made of high strength steel plate, and a reinforcing structure is welded at the base of the fixed bow-shaped cantilever;
the tunnel top support adopts a circular steel tube, the top end of the circular steel tube is welded with the top of the simulated tunnel, and the bottom end of the circular steel tube is welded with the bottom foundation;
the simulated steel rail is made of square steel, and the distance between the two simulated steel rails is 1435 mm.
5. A detection method of the preset data of the arched cantilever of the low clearance tunnel is used for judging the head lowering/head raising phenomenon of the arched cantilever to be detected, and is implemented by adopting the detection device of the preset data of the arched cantilever of the low clearance tunnel of any one of claims 1 to 4, and comprises the following steps:
s1, mounting the tested bow-shaped cantilever
According to the installation site data of the measured bow-shaped cantilever, the height of the adjusting side of the upper platform is adjusted through the superelevation adjusting mechanism, so that the superelevation of the simulated steel rail is adjusted;
moving the upper layer platform and the lower layer platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the preformed hole and the simulated steel rail;
mounting the bow-shaped cantilever base and the telescopic adjusting rod on preformed holes with different heights, and adjusting the mounting height of the tested bow-shaped cantilever;
installing an insulator, a tested bow-shaped cantilever, a messenger wire seat and a positioning wire clamp according to design requirements, and adopting round steel to replace a bearing lead to be installed at the messenger wire seat and the positioning wire clamp;
s2, measuring the levelness of the bow-shaped cantilever by using a level ruler, wherein the slope of head lowering or head raising is not more than 50 mm/m;
when the head is lowered or raised, the tested arched cantilever is adjusted to be horizontal by adjusting the length of the telescopic adjusting rod, and if the length of the telescopic adjusting rod cannot be adjusted to be within the range of design requirements, the reason is searched and the problem is solved, and then the pre-configuration work of the arched cantilever with large area is carried out.
6. A detection method of the preset data of the arch-shaped cantilever of the low clearance tunnel is used for detecting a pull-out value and a lead height, and is implemented by adopting the detection device of the preset data of the arch-shaped cantilever of the low clearance tunnel as claimed in any one of claims 1 to 4, and comprises the following steps:
s1, mounting the tested bow-shaped cantilever
According to the installation site data of the measured bow-shaped cantilever, the height of the adjusting side of the upper platform is adjusted through the superelevation adjusting mechanism, so that the superelevation of the simulated steel rail is adjusted;
moving the upper layer platform and the lower layer platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the preformed hole and the simulated steel rail;
mounting the bow-shaped cantilever base and the telescopic adjusting rod on preformed holes with different heights, and adjusting the mounting height of the tested bow-shaped cantilever;
installing an insulator, a tested bow-shaped cantilever, a messenger wire seat and a positioning wire clamp according to design requirements, and adopting round steel to replace a bearing lead to be installed at the messenger wire seat and the positioning wire clamp;
s2, measuring the simulated lead height and the simulated pull-out value of the carrier cable seat and the positioning wire clamp through the pull-out value lead height detection mechanism, measuring the simulated installation height of the arched cantilever base through the tape measure, wherein the actual lead height of the carrier cable seat is the designed installation height of the arched cantilever base, the simulated installation height of the arched cantilever base and the simulated lead height of the carrier cable seat, and the actual lead height of the positioning wire clamp is the designed installation height of the arched cantilever base, the simulated installation height of the arched cantilever base and the simulated lead height of the positioning wire clamp, and judging whether the actual lead heights of the carrier cable seat and the positioning wire clamp meet the design requirements or not, if not meeting the search reason and solving the problem;
the simulated pull-out value is an actual pull-out value, and whether the actual pull-out value meets the design requirement value is judged, if not, the searching reason is not met and solved;
and after the actual lead height and the actual pull-out value both accord with the design requirement values, performing large-area wrist-arm device pre-configuration work.
7. A detection method of the preset data of the arched cantilever of the low-clearance tunnel is used for detecting the safe distance of the tested arched cantilever on the basis of meeting the requirements of leading height and qualified pulling values, and is implemented by adopting the detection device of the preset data of the arched cantilever of the low-clearance tunnel as claimed in any one of claims 1 to 4, and comprises the following steps:
s1, mounting the tested bow-shaped cantilever
According to the installation site data of the measured bow-shaped cantilever, the height of the adjusting side of the upper platform is adjusted through the superelevation adjusting mechanism, so that the superelevation of the simulated steel rail is adjusted;
moving the upper layer platform and the lower layer platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the preformed hole and the simulated steel rail;
mounting the bow-shaped cantilever base and the telescopic adjusting rod on preformed holes with different heights, and adjusting the mounting height of the tested bow-shaped cantilever;
installing an insulator, a tested bow-shaped cantilever, a messenger wire seat and a positioning wire clamp according to design requirements, and adopting round steel to replace a bearing lead to be installed at the messenger wire seat and the positioning wire clamp;
and S2, on the basis that the measured arched cantilever meets the guiding height and the pull-out value is qualified, measuring the safe distance from the measured arched cantilever to the top of the simulated tunnel by using a measuring tape, and if the safe distance meets the design requirement, searching the reason and solving the problem, and then performing large-area pre-configuration work on the arched cantilever.
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