CN114894160B - 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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- CN114894160B CN114894160B CN202210621276.6A CN202210621276A CN114894160B CN 114894160 B CN114894160 B CN 114894160B CN 202210621276 A CN202210621276 A CN 202210621276A CN 114894160 B CN114894160 B CN 114894160B
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 238000012797 qualification Methods 0.000 claims abstract description 9
- 210000000707 wrist Anatomy 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 36
- 238000013461 design Methods 0.000 claims description 23
- 239000012212 insulator Substances 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 7
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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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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- 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
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
- 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
- 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
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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Abstract
The invention provides a device and a method for detecting the data of the arch cantilever pre-allocation of a low-clearance tunnel, which belong to the technical field of the arch cantilever pre-allocation and comprise a simulated tunnel roof, a tunnel roof support, a bottom foundation, a limit ruler, an adjusting table, a simulated steel rail and a pull-out value height guiding detection mechanism; two sides of the simulated tunnel roof are connected with the top end of the tunnel roof support, the simulated tunnel roof is provided with a mounting seat, and the bottom end of the tunnel roof support is mounted on the bottom foundation; the limit ruler is arranged 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, wherein the lower layer platform is arranged on the bottom foundation, the limit adjusting mechanism is used for moving the upper layer platform and the lower layer platform along the limit ruler, 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 placed on the upper-layer 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 pre-configuration wrist arm when the wrist arm is delivered out of the warehouse is improved.
Description
Technical Field
The invention belongs to the technical field of arcuate cantilever pre-allocation, and particularly discloses a device and a method for detecting arcuate cantilever pre-allocation data of a low-clearance tunnel.
Background
Along with the development of railway electrification construction, the requirement on the installation precision of the cantilever of the overhead line system is higher and higher, the advantages of factory pre-allocation of the cantilever are more and more obvious, the 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-configured cantilever is in assembly line operation, the pre-configured speed is high, and an assembler can easily missee and mark the provided pre-configured data or disqualify the pre-configured arched cantilever due to misoperation and the like.
The single-line tunnel has small clearance, small safety distance and high installation height of the arched cantilever, when the prefabricated cantilever goes out of the warehouse to the site, the stressed arched cantilever is replaced after the carrier cable and the contact line are unfolded, the process is complex, the efficiency is lower, errors are easy to occur, and the safety of site constructors can be influenced.
Disclosure of Invention
The invention provides a device and a method for detecting the pre-configuration data of an arched cantilever of a low-clearance tunnel, which are used for detecting the pre-configuration data at any time during the pre-configuration period and improving the qualification rate of the pre-configuration cantilever when the cantilever is delivered out of a warehouse.
The invention provides a low-clearance tunnel bow cantilever pre-allocation data detection device which comprises a simulated tunnel roof, a tunnel roof support, a bottom foundation, a limit ruler, an adjusting table, a simulated steel rail and a pull-out value height guiding detection mechanism, wherein the simulated steel rail is arranged on the simulated tunnel roof; the two sides of the simulated tunnel roof are connected with the top end of the tunnel roof support, the simulated tunnel roof is provided with a mounting seat, the mounting seat is provided with reserved holes for being connected with an arched cantilever base, a plurality of groups of reserved holes are distributed from high to low, and the bottom end of the tunnel roof support is arranged on a bottom foundation; the limit ruler is placed on the bottom foundation and is perpendicular to the line central line, and the starting point end of the limit ruler is positioned on the plumb line of the reserved hole connected with the arched cantilever base; the adjusting platform comprises an upper layer platform, a lower layer platform, a limit adjusting mechanism and an ultrahigh adjusting mechanism, wherein the lower layer platform is placed on the bottom foundation, two sides of the upper layer platform and the lower layer platform, which are positioned on the central line of the line, are respectively a hinge side and an adjusting side, the hinge sides of the upper layer platform and the lower layer platform are connected through a hinge, the adjusting sides of the lower layer platform are connected with the limit adjusting mechanism, the limit adjusting mechanism is used for moving the upper layer platform and the lower layer platform along a limit ruler, the adjusting sides of the upper layer platform are connected with the ultrahigh adjusting mechanism, and the ultrahigh adjusting mechanism is used for adjusting the height of the adjusting sides of the upper layer platform; the simulated steel rail and the pull-out value height guiding detection mechanism are both placed on the upper-layer platform, and the simulated steel rail is perpendicular to the bow-shaped cantilever to be detected.
Further, the limit adjusting mechanism comprises a limit adjusting screw and a limit adjusting nut; the ultrahigh adjusting mechanism comprises an ultrahigh adjusting screw rod 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; the ultrahigh adjusting nut is sleeved on the ultrahigh adjusting screw rod and is rotationally connected with the adjusting side of the upper platform.
Further, the pull-out value guide height detection mechanism is a laser contact net measuring instrument.
Further, a high-strength steel plate is adopted for the simulated tunnel roof, and a reinforcing structure is welded at the base of the fixed arched cantilever; the tunnel roof support adopts a round steel pipe, the top end is welded with the simulated tunnel roof, and the bottom end is welded with the bottom foundation; the simulated steel rails are square steel, and the distance between the two simulated steel rails is 1435mm.
The invention provides a low-clearance tunnel bow-shaped cantilever pre-configuration data detection method, which is used for judging the low head/head lifting phenomenon of a detected bow-shaped cantilever, and is implemented by adopting the low-clearance tunnel bow-shaped cantilever pre-configuration data detection device, and comprises the following steps of:
s1, mounting an arcuate cantilever to be tested
According to the measured arched cantilever installation field data, the height of the adjusting side of the upper platform is adjusted through the ultrahigh adjusting mechanism, so that the ultrahigh of the simulated steel rail is adjusted;
Moving the upper platform and the lower platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the reserved hole and the simulated steel rail;
mounting the arched cantilever base and the telescopic adjusting rod on reserved holes with different heights, and adjusting the mounting height of the arched cantilever to be measured;
the insulator, the measured bow-shaped cantilever, the carrier cable seat and the positioning wire clamp are installed according to design requirements, and round steel is used for replacing a carrier wire to be installed at the carrier cable seat and the positioning wire clamp;
S2, measuring the levelness of the measured bow-shaped cantilever by adopting a level ruler, wherein the gradient of a low head or a head lifting is not more than 50mm/m;
When the head is lowered or raised, the length of the telescopic adjusting rod is adjusted to be horizontal, if the length of the telescopic adjusting rod cannot be adjusted to be within the design requirement range, the reason is searched and the problem is solved, and then the large-area arcuate wrist arm is pre-configured.
The invention provides a low-clearance tunnel bow-shaped cantilever pre-configuration data detection method, which is used for detecting pull-out values and guide heights, and is implemented by adopting the low-clearance tunnel bow-shaped cantilever pre-configuration data detection device, and comprises the following steps of:
s1, mounting an arcuate cantilever to be tested
According to the measured arched cantilever installation field data, the height of the adjusting side of the upper platform is adjusted through the ultrahigh adjusting mechanism, so that the ultrahigh of the simulated steel rail is adjusted;
Moving the upper platform and the lower platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the reserved hole and the simulated steel rail;
mounting the arched cantilever base and the telescopic adjusting rod on reserved holes with different heights, and adjusting the mounting height of the arched cantilever to be measured;
the insulator, the measured bow-shaped cantilever, the carrier cable seat and the positioning wire clamp are installed according to design requirements, and round steel is used for replacing a carrier wire to be installed at the carrier cable seat and the positioning wire clamp;
s2, measuring the simulated height and simulated pull-out values of the carrier cable seat and the positioning wire clamp through a pull-out value guide-height detection mechanism, measuring the simulated installation height of the arched cantilever base through a tape measure, wherein the actual height of the carrier cable seat = the designed installation height of the arched cantilever base + the simulated installation height of the arched cantilever base-the simulated height of the carrier cable seat, the actual height of the positioning wire clamp = the designed installation height of the arched cantilever base + the simulated installation height of the arched cantilever base-the simulated height of the positioning wire clamp, and judging whether the actual heights of the carrier cable seat and the positioning wire clamp meet the design requirements or not, if not, the search reasons are met;
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 search reason is not met, and the problem is solved;
after the actual height guiding value and the actual pulling value meet the design requirement value, the large-area wrist device pre-allocation work is carried out.
The invention provides a method for detecting the pre-configured data of an arched cantilever of a low-clearance tunnel, which is used for detecting the safe distance on the basis that the measured arched cantilever meets the qualification of a guide height and a pull-out value, and is implemented by adopting the device for detecting the pre-configured data of the arched cantilever of the low-clearance tunnel, and comprises the following steps:
s1, mounting an arcuate cantilever to be tested
According to the measured arched cantilever installation field data, the height of the adjusting side of the upper platform is adjusted through the ultrahigh adjusting mechanism, so that the ultrahigh of the simulated steel rail is adjusted;
Moving the upper platform and the lower platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the reserved hole and the simulated steel rail;
mounting the arched cantilever base and the telescopic adjusting rod on reserved holes with different heights, and adjusting the mounting height of the arched cantilever to be measured;
the insulator, the measured bow-shaped cantilever, the carrier cable seat and the positioning wire clamp are installed according to design requirements, and round steel is used for replacing a carrier wire to be installed at the carrier cable seat and the positioning wire clamp;
S2, measuring the safe distance of the measured arched cantilever from the simulated tunnel roof by using a tape measure on the basis of meeting the qualification of the guide height and the pull-out value, if not, searching the reasons and solving the reasons, and then performing large-area arched cantilever pre-allocation work.
The invention has the following beneficial effects:
By adopting the device and the method for detecting the pre-configuration data of the bow-shaped 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 when the vehicle goes out of the warehouse is improved, the failure rate of the 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 that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a state diagram of the use of a low headroom tunnel arcuate cantilever provisioning data detection device;
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 view of the mounting base.
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 platform 7, a lower 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 net measuring instrument 14, an arc-shaped cantilever base 101, a measured arc-shaped cantilever 102, a telescopic adjusting rod 103, an insulator 104, a carrier cable seat 105 and a positioning wire clamp 106.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides a low-clearance tunnel bow cantilever pre-allocation data detection device which comprises a simulated tunnel roof 1, a tunnel roof support 2, a bottom foundation 3, a limit ruler 4, an adjusting table, a simulated steel rail 5 and a pull-out value height guiding detection mechanism; the two sides of the simulated tunnel roof 1 are connected with the top end of the tunnel roof support 2, the simulated tunnel roof 1 is provided with a mounting seat 6, the mounting seat 6 is provided with reserved holes 6.1 for being connected with an 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 roof support 2 is arranged on a bottom foundation 3; the limit ruler 4 is placed on the bottom foundation 3 and is perpendicular to the line center line 200, and the starting point end of the limit ruler 4 is positioned on the plumb line of the reserved hole 6.1 connected with the arched cantilever base 101; the adjusting table 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 arranged on the bottom foundation 3, two sides of the upper layer platform 7 and the lower layer platform 8, which are positioned on the line center line 200, 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 the 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 guiding detection mechanism are both arranged on the upper platform 7, and the simulated steel rail 5 is perpendicular to the bow-shaped cantilever 102 to be detected.
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, so that the horizontal distance between the installation position of the arched cantilever base 101 and the line center line 200 is consistent with the vertical height between the installation position of the arched cantilever base 101 and the vault of the simulated tunnel roof 1.
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 rod 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 limit adjusting screw 10 and is in rotary connection with the limit adjusting nut 11; the ultra-high adjusting nut 13 is sleeved on the ultra-high adjusting screw rod 12 and is rotationally connected with the adjusting side of the upper platform 7. The limit adjusting nut 11 is rotated to enable the limit adjusting nut 11 to move along the limit adjusting screw 10, the ultra-high adjusting screw 12, the ultra-high adjusting nut 13 and the upper platform 7 connected with the ultra-high adjusting nut 13 can be driven to move, so that the limit between the reserved hole 6.1 and the simulated steel rail 5 can be adjusted by enabling the adjusting platform to move along the limit ruler 4. The lower-layer platform 8 is fixedly connected with the ultrahigh adjusting screw 12 so as to ensure the connection strength between the ultrahigh adjusting mechanism and the adjusting table. The super high adjusting nut 13 is rotated to move along the super high 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 super high of the simulated steel rail 5 is adjusted.
Further, the pull-out value guide height detection mechanism is a laser contact net measuring instrument 14.
Further, the simulated tunnel roof 1 adopts a high-strength steel plate, and the arch crown radian of the high-strength steel plate is in accordance with the actual arc form 1 of the tunnel: 1, simulating construction, namely welding a reinforcing structure at the position of a fixed arched cantilever base 101; the tunnel roof support 2 adopts a round steel pipe with the height of 1m, the top end is welded with the simulated tunnel roof 1, and the bottom end is welded with the bottom foundation 3; the simulated steel rails 5 are square steel, and the distance between the two simulated steel rails 5 is 1435mm.
Example 2
The embodiment provides a method for detecting the pre-configuration data of the bow-shaped cantilever of a low clearance tunnel, which is used for judging the low head/head-up phenomenon of the bow-shaped cantilever 102 to be detected, and the method is implemented by adopting the device for detecting the pre-configuration data of the bow-shaped cantilever of the low clearance tunnel, which is described in the embodiment 1, wherein the height and the limit of the bow-shaped cantilever base 101 are determined according to a single-line low clearance tunnel structure, so as to simulate the connection and installation relation between the bow-shaped cantilever device (comprising the bow-shaped cantilever base 101, the telescopic adjusting rod 103, the insulator 104, the bow-shaped cantilever 102 to be detected, the carrier cable seat 105 and the positioning cable clamp 106) and the field tunnel and the rail surface, and the method can still need to judge whether the bow-shaped cantilever 102 to be detected has the obvious head-up/low head phenomenon after the adjustment is completed by adjusting the telescopic adjusting rod 103.
Comprising the following steps:
s1, mounting an arcuate cantilever to be tested
According to the field data of the installation of the measured bow-shaped cantilever 102, the height of the adjusting side of the upper platform 7 is adjusted through the ultrahigh adjusting mechanism, so that the ultrahigh of the simulated steel rail 5 is adjusted;
the upper platform 7 and the lower platform 8 are moved along the limit ruler 4 by a limit adjusting mechanism, so that the limit between the reserved hole 6.1 and the simulated steel rail 7 is adjusted;
the arched cantilever base 101 and the telescopic adjusting rod 103 are arranged on the reserved holes 6.1 with different heights, and the installation height of the arched cantilever 102 to be measured is adjusted;
the insulator 104, the measured bow-shaped cantilever 102, the carrier cable seat 105 and the positioning wire clamp 106 are arranged according to design requirements, and round steel is used for replacing a carrier wire to be arranged at the carrier cable seat 105 and the positioning wire clamp 106;
S2, measuring the levelness of the measured bow-shaped cantilever 102 by adopting a level bar, wherein the gradient of a low head or a head lifting is not more than 50mm/m;
when the head is lowered or raised, the length of the telescopic adjusting rod 103 is adjusted to be horizontal, if the length cannot be adjusted to be within the design requirement range, the problem of whether the measurement, calculation or pre-allocation links occurs is found, and after the problem is solved, the pre-allocation work of the large-area arched wrist arm is carried out.
Example 3
The embodiment provides a method for detecting the preset data of the arched cantilever of a low-clearance tunnel, which is used for detecting the pull-out value and the guide height, and is implemented by adopting the device for detecting the preset data of the arched cantilever of the low-clearance tunnel, and the post limit measurement data of a railway installation site is simulated by adjusting the horizontal distance between the center position of a simulated steel rail 5 (namely the center origin of the simulated steel rail 5) and a preset hole 6.1, then the laser contact net measuring instrument 14 measures the pull-out value, the guide height data is converted into actual data, and then the actual data is compared with a design theoretical value, so that whether the detected arched cantilever 102 is qualified is judged.
Comprising the following steps:
s1, mounting an arcuate cantilever to be tested
According to the field data of the installation of the measured bow-shaped cantilever 102, the height of the adjusting side of the upper platform 7 is adjusted through the ultrahigh adjusting mechanism, so that the ultrahigh of the simulated steel rail 5 is adjusted;
the upper platform 7 and the lower platform 8 are moved along the limit ruler 4 by a limit adjusting mechanism, so that the limit between the reserved hole 6.1 and the simulated steel rail 7 is adjusted;
the arched cantilever base 101 and the telescopic adjusting rod 103 are arranged on the reserved holes 6.1 with different heights, and the installation height of the arched cantilever 102 to be measured is adjusted;
the insulator 104, the measured bow-shaped cantilever 102, the carrier cable seat 105 and the positioning wire clamp 106 are arranged according to design requirements, and round steel is used for replacing a carrier wire to be arranged at the carrier cable seat 105 and the positioning wire clamp 106;
S2, measuring the simulated height and simulated pull-out values of the carrier cable seat 105 and the positioning wire clamp 106 through a pull-out value guide-height detection mechanism, measuring the simulated installation height of the arched cantilever base 101 through a tape measure, wherein the actual height of the carrier cable seat 105 = the designed installation height of the arched cantilever base 101 + the simulated installation height of the arched cantilever base 101-the simulated height of the carrier cable seat 105, the actual height of the positioning wire clamp 106 = the designed installation height of the arched cantilever base 101 + the simulated installation height of the arched cantilever base 101-the simulated height of the positioning wire clamp 106, and judging whether the actual heights of the carrier cable seat 105 and the positioning wire clamp 106 meet the design requirements or not, if not meet the searching reasons, whether the measuring, calculating or pre-allocation links are problematic and solved; the simulated 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, whether a measuring, calculating or pre-configuring link has a problem is judged, and the problem is solved;
after the actual height guiding value and the actual pulling value meet the design requirement value, the large-area wrist device pre-allocation work is carried out.
Example 4
The embodiment provides a low-clearance tunnel bow-shaped cantilever pre-configuration data detection method, which is used for detecting a safety distance on the basis that the tested bow-shaped cantilever meets the qualification of a guide height and a pull-out value.
Comprising the following steps:
s1, mounting an arcuate cantilever to be tested
According to the field data of the installation of the measured bow-shaped cantilever 102, the height of the adjusting side of the upper platform 7 is adjusted through the ultrahigh adjusting mechanism, so that the ultrahigh of the simulated steel rail 5 is adjusted;
the upper platform 7 and the lower platform 8 are moved along the limit ruler 4 by a limit adjusting mechanism, so that the limit between the reserved hole 6.1 and the simulated steel rail 7 is adjusted;
the arched cantilever base 101 and the telescopic adjusting rod 103 are arranged on the reserved holes 6.1 with different heights, and the installation height of the arched cantilever 102 to be measured is adjusted;
the insulator 104, the measured bow-shaped cantilever 102, the carrier cable seat 105 and the positioning wire clamp 106 are arranged according to design requirements, and round steel is used for replacing a carrier wire to be arranged at the carrier cable seat 105 and the positioning wire clamp 106;
S2, on the basis that the measured arched cantilever 102 meets the qualification of the guide height and the pull-out value, measuring the safety distance between the measured arched cantilever 102 and the simulated tunnel roof 1 by using a tape measure, if the safety distance meets the design requirement, searching for reasons, and solving the problems in the measuring, calculating or pre-configuring links, and then performing the pre-configuring work of the large-area arched cantilever.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. The device is characterized by comprising a simulated tunnel roof, a tunnel roof support, a bottom foundation, a limit ruler, an adjusting table, a simulated steel rail and a pull-out value height guiding detection mechanism;
The two sides of the simulated tunnel roof are connected with the top end of the tunnel roof support, the simulated tunnel roof is provided with a mounting seat, the mounting position of the mounting seat is determined according to the actual mounting height of the arched cantilever base and the radian of the tunnel, and the horizontal distance between the mounting position of the arched cantilever base and the central line of the line is ensured to be consistent with the vertical height between the mounting position of the arched cantilever base and the vault of the simulated tunnel roof;
The mounting seat is provided with preformed holes for being connected with the arched cantilever base, a plurality of groups of preformed holes are distributed from high to low, and the bottom end of the tunnel top support is mounted on the bottom foundation;
The limit ruler is placed on the bottom foundation and is perpendicular to the line central line, and the starting point end of the limit ruler is positioned on the plumb line of the reserved hole connected with the arched cantilever base;
The adjusting table comprises an upper layer platform, a lower layer platform, a limit adjusting mechanism and an ultrahigh adjusting mechanism, wherein the lower layer platform is placed on a bottom foundation, two sides of the upper layer platform and the lower layer platform, which are positioned on a central line of a line, are respectively a hinge side and an adjusting side, the hinge sides of the upper layer platform and the lower layer platform are connected through a hinge, the adjusting sides of the lower layer platform are connected with the limit adjusting mechanism, the limit adjusting mechanism is used for moving the upper layer platform and the lower layer platform along a limit ruler, the adjusting sides of the upper layer platform are connected with the ultrahigh adjusting mechanism, and the ultrahigh adjusting mechanism is used for adjusting the height of the adjusting sides of the upper layer platform;
the simulated steel rail and the pull-out value height guiding detection mechanism are both placed on the upper-layer platform, and the simulated steel rail is perpendicular to the bow-shaped cantilever to be detected.
2. The low headroom tunnel arcuate cantilever preconditioning data detection device of claim 1, wherein the limit adjustment mechanism comprises a limit adjustment screw and a limit adjustment nut;
the ultrahigh adjusting mechanism comprises an ultrahigh adjusting screw rod 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 in rotary connection with the limit adjusting nut;
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 headroom tunnel arcuate cantilever pre-configured data detection device of claim 2, wherein the pull-out value elevation guiding detection mechanism is a laser catenary survey meter.
4. The low headroom tunnel arcuate cantilever pre-configured data detection device of claim 3, wherein the simulated tunnel roof is a high strength steel plate, and a reinforcing structure is welded at the base of the fixed arcuate cantilever;
The tunnel roof support adopts a round steel pipe, the top end is welded with the simulated tunnel roof, and the bottom end is welded with the bottom foundation;
the simulated steel rails are square steel, and the distance between the two simulated steel rails is 1435mm.
5. The method for detecting the low-clearance tunnel bow-shaped cantilever pre-configuration data is used for judging the low head/head lifting phenomenon of the detected bow-shaped cantilever, and is characterized by being implemented by adopting the low-clearance tunnel bow-shaped cantilever pre-configuration data detection device according to any one of claims 1-4, and comprising the following steps:
s1, mounting an arcuate cantilever to be tested
According to the measured arched cantilever installation field data, the height of the adjusting side of the upper platform is adjusted through the ultrahigh adjusting mechanism, so that the ultrahigh of the simulated steel rail is adjusted;
Moving the upper platform and the lower platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the reserved hole and the simulated steel rail;
mounting the arched cantilever base and the telescopic adjusting rod on reserved holes with different heights, and adjusting the mounting height of the arched cantilever to be measured;
the insulator, the measured bow-shaped cantilever, the carrier cable seat and the positioning wire clamp are installed according to design requirements, and round steel is used for replacing a carrier wire to be installed at the carrier cable seat and the positioning wire clamp;
S2, measuring the levelness of the measured bow-shaped cantilever by adopting a level ruler, wherein the gradient of a low head or a head lifting is not more than 50mm/m;
When the head is lowered or raised, the length of the telescopic adjusting rod is adjusted to be horizontal, if the length of the telescopic adjusting rod cannot be adjusted to be within the design requirement range, the reason is searched and the problem is solved, and then the large-area arcuate wrist arm is pre-configured.
6. The method for detecting the low-clearance tunnel bow-shaped cantilever pre-configured data is used for detecting pull-out values and guide heights and is characterized by being implemented by adopting the low-clearance tunnel bow-shaped cantilever pre-configured data detection device according to any one of claims 1-4, and comprises the following steps:
s1, mounting an arcuate cantilever to be tested
According to the measured arched cantilever installation field data, the height of the adjusting side of the upper platform is adjusted through the ultrahigh adjusting mechanism, so that the ultrahigh of the simulated steel rail is adjusted;
Moving the upper platform and the lower platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the reserved hole and the simulated steel rail;
mounting the arched cantilever base and the telescopic adjusting rod on reserved holes with different heights, and adjusting the mounting height of the arched cantilever to be measured;
the insulator, the measured bow-shaped cantilever, the carrier cable seat and the positioning wire clamp are installed according to design requirements, and round steel is used for replacing a carrier wire to be installed at the carrier cable seat and the positioning wire clamp;
S2, measuring the simulated height and simulated pull-out values of the carrier cable seat and the positioning wire clamp through a pull-out value guide-height detection mechanism, measuring the simulated installation height of the arched cantilever base through a tape measure, wherein the actual height of the carrier cable seat = the designed installation height of the arched cantilever base + the simulated installation height of the arched cantilever base-the simulated height of the carrier cable seat, the actual height of the positioning wire clamp = the designed installation height of the arched cantilever base + the simulated installation height of the arched cantilever base-the simulated height of the positioning wire clamp, and judging whether the actual heights of the carrier cable seat and the positioning wire clamp meet the design requirements or not, if not, the search reasons are met;
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 search reason is not met, and the problem is solved;
after the actual height guiding value and the actual pulling value meet the design requirement value, the large-area wrist device pre-allocation work is carried out.
7. The method for detecting the low-clearance tunnel bow-shaped cantilever pre-configured data is used for detecting the safety distance on the basis that the tested bow-shaped cantilever meets the qualification of the guide height and the pull-out value, and is characterized by being implemented by adopting the low-clearance tunnel bow-shaped cantilever pre-configured data detection device according to any one of claims 1-4, and comprises the following steps:
s1, mounting an arcuate cantilever to be tested
According to the measured arched cantilever installation field data, the height of the adjusting side of the upper platform is adjusted through the ultrahigh adjusting mechanism, so that the ultrahigh of the simulated steel rail is adjusted;
Moving the upper platform and the lower platform along the limit ruler through a limit adjusting mechanism so as to adjust the limit between the reserved hole and the simulated steel rail;
mounting the arched cantilever base and the telescopic adjusting rod on reserved holes with different heights, and adjusting the mounting height of the arched cantilever to be measured;
the insulator, the measured bow-shaped cantilever, the carrier cable seat and the positioning wire clamp are installed according to design requirements, and round steel is used for replacing a carrier wire to be installed at the carrier cable seat and the positioning wire clamp;
S2, measuring the safe distance of the measured arched cantilever from the simulated tunnel roof by using a tape measure on the basis of meeting the qualification of the guide height and the pull-out value, if not, searching the reasons and solving the reasons, and then performing large-area arched cantilever pre-allocation work.
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