CN103983256B - A kind of contact network in tunnel casts anchor construction survey method - Google Patents

A kind of contact network in tunnel casts anchor construction survey method Download PDF

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Publication number
CN103983256B
CN103983256B CN201410242324.6A CN201410242324A CN103983256B CN 103983256 B CN103983256 B CN 103983256B CN 201410242324 A CN201410242324 A CN 201410242324A CN 103983256 B CN103983256 B CN 103983256B
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China
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leveling ruler
tunnel
anchor
leveling
sheave
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CN103983256A (en
Inventor
谢琪峰
王志义
李鲁杰
刘志富
王耀辉
邵红军
王晓峰
严鑫
李晓鹏
王信
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Electrification Engineering Co Ltd Of Cr 20 G
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Electrification Engineering Co Ltd Of Cr 20 G
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00Measuring inclination, e.g. by clinometers, by levels

Abstract

The invention discloses a kind of contact network in tunnel to cast anchor construction survey method, contact net of constructing divide multiple anchor section, be provided with overlap between former and later two anchor sections; Overlap comprises ending fitting, ending fitting comprises supportive device, contact suspension device and compensation system, supportive device is be fixed on the anchor arm on the wall of Tunnel hole, when installing ending fitting, process is as follows: one, supportive device is installed: install the anchor arm of current installed ending fitting; Two, compensation system is installed: when installing compensation system, adopts three-dimensional chi of surveying to carry out measurement and positioning; When installing compensation system, process is as follows: front side pulley is installed, three-dimensional survey chi lays, leading block is located and compensate rope and compensating sheave is installed.The inventive method step is simple, reasonable in design, input cost is lower and it is convenient to realize, result of use is good, can solve use operation inconvenience that traditional measurement method exists, workload large, measure the problems such as difficulty is higher, measuring error is larger.

Description

A kind of contact network in tunnel casts anchor construction survey method
Technical field
The invention belongs to contact network in tunnel technical field of construction, especially relate to a kind of contact network in tunnel and to cast anchor construction survey method.
Background technology
Contact net is in electric railway, sets up, get the high voltage transmission line of stream for pantograph along rail overhead "the" shape.Contact net is the main truss of railway electrification project, and be the transmission line of electricity of the special shape of powering to electric locomotive of downline overhead erection, it is made up of contact suspension, supportive device, locating device, pillar and basis.Contact net is divided into many independently segmentations usually, and this independently segmentation is called anchor section.Carrier cable and the osculatory at anchor section two ends are all fixed on ending fitting.
Electrified railway tunnels construction comprises construction survey, punching, anchor are planted and the key link such as installation.Affect by landform, environment, crossed construction, light etc. in tunnel, in tunnel the more difficult accurate location of construction survey, and it is many to add Anchoring part joint, tunnel, and thus in tunnel, the workload of measurement and positioning is very large.And construction survey is key and the foundation of constructing tunnel, if can not accurately settle at one go, by seriously govern, subsequent handling is punched, anchor is planted and installs, most important to constructing tunnel quality, once go wrong, anchor will be caused to plant mistake and install difficulty.Various bars of imbedding in tunnel can not be transferred to again, cause the serious waste of material and do over again more greatly.Therefore, strict requirement is proposed to construction survey work in tunnel, a bit mistake can not be occurred.
Traditional Tunnel construction survey is all be manually main, the survey instrument adopted comprises steel tape, surveyor's staff, bamboo pole, line falls, marking pen etc., there is no special measurement instrument, practical operation inconvenience, and construction survey is affected by human factors larger, measurement accuracy cannot be held, thus can not control survey error well, when particularly ending fitting is installed, to the surveying work of the devices such as anchor arm position and leading block that cast anchor, require along line direction high voltage electricity transmission conductive wire (i.e. osculatory wire, also osculatory is claimed) must be in the same plane with the compensating sheave installed on anchor arm, anchor arm front end, horizontal path direction install compensating sheave must with tunnel wall on install be on same vertical plane to multiple leading blocks that the compensation rope lifting falling mound block in compensation system leads, could solve compensating sheave in compensating mechanism of contact net preferably and compensate the eccentric wear problem between restricting like this.Actual when carrying out construction survey, affect by landform, environment, crossed construction, light etc. in tunnel, construction survey is more difficult accurate location just.
At present, cannot carry out Measurement accuracy to the position of the position of the place's of casting anchor anchor arm in tunnel and leading block base, conventional measuring method is boostrap pendant suspention mensuration, though the method is simple, but easily cause and do over again, and after construction and installation, easily cause eccentric wear, the de-problem such as groove, broken string.In addition, due to cast anchor place's complicacy of tunnel wall structure and high ferro high to ending fitting standard-required, to the inconvenience that construction survey brings, first surveying instrument is because landform and parameter (angle upwards lifted by total powerstation camera lens can only reach about 60 ° at most) cannot use, add and generally have the tunnel headroom height of ending fitting to exceed nearly 2 meters than the tunnel clearance that common davit is installed, highest point reaches more than 11 meters, brings larger difficulty to workmen at tunnel roof surveying work.Especially to anchor arm front end to install in compensating sheave and tunnel wall leading block is installed installation site control, the height of compensating sheave in if the height along line direction leading block is higher or lower than the place's compensating mechanism of contact net that casts anchor, the wire rope easily de-groove of compensating sheave (i.e. horizontal trolley); If, easily cause leading block (i.e. vertical pulley) steel cable slot disengaging left in the position of horizontal path direction leading block or right avertence position of compensating sheave in the place's compensating mechanism of contact net that casts anchor.In addition, as can not on anchor arm to install in compensating sheave and tunnel wall leading block is installed installation site accurately control, in compensating mechanism of contact net compensating sheave and the eccentric wear problem between restricting that compensates comparatively serious.
Summary of the invention
Technical matters to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of contact network in tunnel is provided to cast anchor construction survey method, its method step is simple, reasonable in design, input cost is lower and it is convenient to realize, result of use is good, can solve use operation inconvenience that traditional measurement method exists, workload large, measure the problems such as difficulty is higher, measuring error is larger.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of contact network in tunnel casts anchor construction survey method, contact net of constructing be divided into multiple anchor section from front to back along the direction extending longitudinally of Tunnel, be provided with overlap between anchor section described in former and later two; Described overlap comprises ending fitting, described ending fitting comprises supportive device, contact suspension device and compensation system, the osculatory of contact net of constructing hang on described supportive device by described contact suspension device, described supportive device is the anchor arm that upper end is fixed on the wall of Tunnel hole, it is characterized in that: when installing described ending fitting, process is as follows:
Step one, supportive device are installed: install the anchor arm of current installed ending fitting;
Step 2, compensation system are installed: install the compensation system of current installed ending fitting, and when installing compensation system, adopt three-dimensional chi of surveying to carry out measurement and positioning;
Described three-dimensional survey chi by three between two orthogonal leveling ruler be formed by connecting, three described leveling rulers are provided with a level detection device; Three described leveling rulers are respectively the first leveling ruler, the second leveling ruler and the 3rd leveling ruler, the inner of the inner of described first leveling ruler, the inner of the second leveling ruler and the 3rd leveling ruler is fastenedly connected and is integrated, described first leveling ruler and the second leveling ruler perpendicular, second leveling ruler and the 3rd leveling ruler perpendicular, the first leveling ruler and the 3rd leveling ruler perpendicular; Described first leveling ruler and the second leveling ruler are positioned in same level, described 3rd leveling ruler is in vertically to laying and it is positioned at below the first leveling ruler and the second leveling ruler, described second leveling ruler and the 3rd leveling ruler are positioned on same vertical plane, and described first leveling ruler is positioned at the inner side of the second leveling ruler and the 3rd leveling ruler; The tie point of three described leveling ruler the inners is datum mark;
Described contact suspension device comprises carrier cable; Described compensation system comprises multiple compensating sheave, multiple described compensating sheave carries out from front to back laying and it is all laid in same level, connect as one by compensating rope between multiple described compensating sheave, the compensating sheave being positioned at front side in multiple described compensating sheave is front side pulley, described front side pulley is the fixed pulley be arranged on anchor arm, the compensating sheave being positioned at last side in multiple described compensating sheave is rear side pulley, and described rear side pulley is the travelling block be connected with carrier cable; The hole wall of described Tunnel is provided with multiple to compensating the leading block of restricting and leading, multiple described leading block from top to bottom carries out laying and it is laid on same vertical plane, and the leading block being positioned at topmost in multiple described leading block is upper sheave; The wheel shaft of described rear side pulley is provided with link, and described carrier cable is arranged on link; Described one end compensating rope is fixed on link and its other end is lifted with pendant sticks together block;
When installing compensation system, process is as follows:
Step 201, front side pulley are installed: in step one after anchor arm installation, be arranged on anchor arm by the described front side pulley level of compensation system;
Step 202, three-dimensional chi of surveying lay: described three-dimensional is surveyed the installed position that chi is laid in current installed ending fitting, and the datum mark making described three-dimensional survey chi is positioned at pulley week side, described front side; Afterwards, adjust the position of the first leveling ruler and the second leveling ruler, make the first leveling ruler and the second leveling ruler all be in horizontality, and make the second leveling ruler be parallel laying with the central lines of track at current installed ending fitting present position place;
Wherein, when the first leveling ruler and the second leveling ruler are adjusted, detected by the horizontality of level detection device to the first leveling ruler and the second leveling ruler set on the first leveling ruler and the second leveling ruler;
Step 203, leading block are located: the first leveling ruler in the three-dimensional survey chi utilizing cloth in step 202 to put well and the 3rd leveling ruler, and vertical plane is determined the installation site of multiple described leading block; Further, the setting height(from bottom) of the first leveling ruler to described upper sheave is utilized to determine;
Step 204, compensate rope and compensating sheave is installed: the compensation rope of compensation system and other compensating sheave are installed, and is arranged on link by the carrier cable hanging osculatory.
Above-mentioned a kind of contact network in tunnel casts anchor construction survey method, it is characterized in that: when multiple described anchor section is constructed, according to installation position tandem, construct respectively to multiple described anchor section in direction extending longitudinally along Tunnel before backward, the construction method of multiple described anchor section is all identical; The junction of adjacent two the described anchor sections in front and back shares a described ending fitting, and the ending fitting set by each described anchor section rear and front end is respectively front ending fitting and rear ending fitting;
When constructing to any one anchor section, according to the method described in step one to step 2, ending fitting before current constructed anchor section is installed; Carry out in installation process to described front ending fitting, unwrapping wire is carried out to the osculatory of current constructed anchor section, and by osculatory rear suspension on the rear ending fitting of current constructed anchor section, after described front ending fitting installation, by osculatory front suspension on described front ending fitting.
Above-mentioned a kind of contact network in tunnel casts anchor construction survey method, it is characterized in that: after compensating rope and compensating sheave installation in step 204, also needs to adopt three-dimensional that in step 202, cloth is put well to survey the installation site of chi to compensation system and checks; When the installation site of compensation system is checked, surface level need be carried out and check and check with vertical plane;
Carry out surface level when checking, adopt the first leveling ruler and the second leveling ruler, in the horizontal plane the compensation rope be connected between described front side pulley and described upper sheave and the compensation rope be connected between multiple described compensating sheave are checked: when the compensation rope be connected between described front side pulley and described upper sheave and the compensation rope be connected between multiple described compensating sheave are all on same plane S1, and when to be connected to described front side pulley be parallel laying with the compensation rope between described upper sheave and the first leveling ruler, illustrate that the installation site of described upper sheave is accurate; Otherwise, need adjust the installation site of described upper sheave, until by the adjustment of the installation site of described upper sheave accurately; Wherein, planar S 1 is that the first leveling ruler is with the plane at the second leveling ruler place or be the surface level of parallel laying with the first leveling ruler and the plane at the second leveling ruler place;
After the installation site adjustment accurately of described upper sheave, then carry out vertical plane and check;
Carry out vertical plane when checking, adopt the first leveling ruler and the 3rd leveling ruler, vertical plane checks being connected to the compensation rope that described upper sheave and pendant stick together between block: when being connected to described upper sheave and the pendant compensation rope sticked together between block is on same plane S2, illustrate that the installation site of each leading block in compensation system is all accurate; Otherwise, need adjust the installation site of other leading block in compensation system except described upper sheave, until the installation site of leading block each in compensation system is all adjusted accurately; Wherein, planar S 2 is that the first leveling ruler is with the plane at the 3rd leveling ruler place or be the vertical plane of parallel laying with the first leveling ruler and the plane at the 3rd leveling ruler place.
Above-mentioned a kind of contact network in tunnel casts anchor construction survey method, it is characterized in that: carry out three-dimensional in step 202 and survey chi when laying, the datum mark that described three-dimensional surveys chi is positioned at pulley side, described front side and itself and described front side pulley are laid in same level.
Above-mentioned a kind of contact network in tunnel casts anchor construction survey method, it is characterized in that: in step 202, the structure of three described leveling rulers is all identical, and three described leveling rulers includes straight chi body; Described straight chi body is shrinkage-rule;
In step 2, the multiple described leading block of current installed compensation system is all laid on hole, the same side wall of Tunnel; Carry out three-dimensional in step 202 and survey chi when laying, the outer end of described first leveling ruler is propped up on the Tunnel hole wall withstood on residing for current installed multiple leading block.
Above-mentioned a kind of contact network in tunnel casts anchor construction survey method, it is characterized in that: the xsect of described straight chi body is rectangle, and the lateral wall of described straight chi body is provided with scale mark.
Above-mentioned a kind of contact network in tunnel casts anchor construction survey method, it is characterized in that: before installing anchor arm in step one, first adopts center locating device, the hole wall of Tunnel positions measurement to the center of anchor arm;
Described center locating device comprises the laser plummet positioned the center of anchor arm and the total powerstation measured the center of anchor arm;
When positioning measurement to the center of anchor arm, process is as follows:
Step 101, laser plummet and total powerstation set up: be installed on support by laser plummet level, and described support is set up on the ground in Tunnel; And, to the center of anchor arm in a beam alignment Tunnel on being sent by laser plummet, meanwhile, set up described total powerstation, and the prism of described total powerstation is laid in below described support, and the lower installation position point to a beam alignment prism that laser plummet is sent; The installation position point of described prism is positioning datum point, and described positioning datum point sends by laser plummet lower to the incident point of a light beam on described ground, and to lay in coaxial a light beam down with described a light beam on described, described prism is level laying;
Step 102, center location survey: adopt the described total powerstation set up in step 101 to measure the center of anchor arm in Tunnel.
Above-mentioned a kind of contact network in tunnel casts anchor construction survey method, it is characterized in that: described center locating device also comprises and to move forward and backward in Tunnel and for the tower wagon of the construction survey librarian use that the center of anchor arm marks, by the hand-held holding rod of described construction survey personnel and the marker pen being arranged on holding rod top, described tower wagon is positioned at left side or the right side of described support;
After in step 102, the center position measurement of anchor arm completes, according on described to the incident point of a light beam on Tunnel top board, the described marker pen that the construction survey personnel stood on tower wagon utilize holding rod and are loaded on holding rod top directly draws the center of anchor arm.
Above-mentioned a kind of contact network in tunnel casts anchor construction survey method, and it is characterized in that: be laid with multiple davit for installing bracket in described Tunnel, multiple described davit is laid from front to back along the direction extending longitudinally of Tunnel; Before installing described davit, according to the method described in step 101 to step 102, described center locating device is adopted to position measurement to the center of davit in Tunnel.
Above-mentioned a kind of contact network in tunnel casts anchor construction survey method, it is characterized in that: level detection device described in step 202 is level.
The present invention compared with prior art has the following advantages:
1, the three-dimensional that adopts surveys that chi structure is simple, reasonable in design and input cost is lower, and use easy and simple to handle, it is convenient to measure, to greatly reduce in ending fitting installation process on anchor arm on institute's installation compensating sheave and tunnel wall the positioning difficulty of leading block is installed.
2, three-dimensional chi of surveying is adopted to carry out three-dimensional measurement when ending fitting is installed, result of use is good and measuring error is little, measurement result is accurate, can be easy, effective guarantee top leading block with cast anchor that to locate compensating sheave be that level is laid, can ensure that again all leading blocks are all in the same vertical plane with the compensating sheave located of casting anchor, that is along line direction leading block and compensating sheave contour, horizontal path direction leading block and compensating sheave in the same plane, can in institute's installation compensating sheave on anchor arm and tunnel wall leading block is installed installation site carry out easy, accurate control, significantly reduce rework rate, and not easily occur after contact network construction completes that compensating rope rubs and de-groove partially, the problems such as broken string.
3, when ending fitting is installed, the construction survey method that adopts is simple and measurement effect good, can in institute's installation compensating sheave on anchor arm and tunnel wall leading block is installed installation site carry out easy, accurately control.
4, the center positioning device structure adopted is simple, reasonable in design and input cost is lower, and use easy and simple to handle and install laying conveniently, stable work in work, anti-dust performance is good.
5, the total powerstation in the locating device of center is without the need to frequent movement, erection once can realize the range finding demand of multiple some position, and the result of use of center locating device is good and measuring error is little, measurement result is accurate, can effectively solve the use operation inconvenience, the workload that exist when traditional construction measuring method carries out davit or location, anchor arm center large, measure the problems such as difficulty is higher, measuring error is larger, thus according to positioning measurement result, can effectively departure and insulating safety distances in work progress, there will not be and do over again.
6, the construction survey method adopted is simple, realization is convenient and result of use is good, because current China Tunnel construction survey there is no more advanced special measurement instrument, particularly cast anchor in tunnel the surveying work of the devices such as anchor arm position and rotating pulley, it is the controlling difficulties of contact network in tunnel construction, thus the eccentric wear problem of compensating sheave wire rope can not be solved well, add by landform in tunnel, environment, crossed construction, the impacts such as light, construction survey is more difficult accurate location just, especially many for Anchoring part joint, tunnel, equipment is many, the double track railway that specific position is many, in tunnel, the workload of measurement and positioning is very large, circumstance complication is changeable, construction survey difficulty is larger.In patented claim of the present invention, traditional construction survey method and corresponding survey instrument are improved, result of use is very good, effectively can control the accumulated error produced in contact network in tunnel construction survey, contact network construction quality is significantly improved, and improve installation effectiveness and the installation quality of contact network in tunnel, can guarantee that motorcycle pantograph can normally even running from network (sliding), and the insulation against ground distance of various spare and accessory parts (equipment) in tunnel can be guaranteed, insulation distance (insulation joint) each other and flexibility and reliability thereof use.
7, popularizing application prospect is extensive, along with the high speed development of China railways, electrified contacting nets popularity rate is more and more higher, railway in many tunnels has also carried out electrified contacting nets transformation, the present invention adopt the application of construction survey method very wide, the contact network construction of straight-line segment in tunnel can not only be applicable to, and effectively can be applicable to the contact network construction of tunnel introversion line segment.
In sum, the inventive method step is simple, reasonable in design, input cost is lower and it is convenient to realize, result of use is good, can effectively solve use operation inconvenience that traditional measurement method exists, workload large, measure the problems such as difficulty is higher, measuring error is larger.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is method flow block diagram when adopting the present invention to install ending fitting.
Fig. 2 is the structural representation that the present invention's three-dimensional surveys chi.
The three-dimensional measuring state schematic diagram surveying chi when Fig. 3 is compensation system of the present invention installation.
Fig. 4 to construct the structural representation of compensation system used for contact net anchorage in institute of the present invention construction tunnel.
Fig. 5 is multiple compensating sheave of compensation system in Fig. 4 and the installation position schematic diagram of carrier cable.
Fig. 6 is the using state reference diagram of the present invention when adopting traditional construction measuring method determination davit center.
Fig. 7 is the measuring state schematic diagram of the present invention when adopting center locating device to position measurement to anchor arm center.
Fig. 8 is the measuring state schematic diagram of the present invention when adopting center locating device to position measurement to davit center.
Fig. 9 is the installation position schematic diagram of davit in Tunnel of the present invention.
Description of reference numerals:
1-1-the first leveling ruler; 1-2-the second leveling ruler; 1-3-the 3rd leveling ruler;
2-level; 3-Tunnel; 4-1-carrier cable;
4-2-dropper; 5-osculatory; 6-anchor arm;
7-compensation system; 7-1-compensating sheave; 7-2-compensation rope;
7-3-pendant sticks together block; 7-4-link; 8-leading block;
9-base; 10-2-laser plummet; 10-3-tripod;
10-4-prism; 10-6-tower wagon; 10-7-holding rod;
11-railroad track; 11-1-bamboo pole; 11-2-line pendant;
11-3-bolt; 11-5-steel tape; 12-davit.
Embodiment
A kind of contact network in tunnel as shown in Figure 1 casts anchor construction survey method, contact net of constructing be divided into multiple anchor section from front to back along the direction extending longitudinally of Tunnel 3, be provided with overlap between anchor section described in former and later two; Described overlap comprises ending fitting, described ending fitting comprises supportive device, contact suspension device and compensation system 7, the osculatory 5 of contact net of constructing hang on described supportive device by described contact suspension device, described supportive device is the anchor arm 6 that upper end is fixed on the wall of Tunnel 3 hole.When installing described ending fitting, process is as follows:
Step one, supportive device are installed: install the anchor arm 6 of current installed ending fitting.
Step 2, compensation system are installed: install the compensation system 7 of current installed ending fitting, and when installing compensation system 7, adopt three-dimensional chi of surveying to carry out measurement and positioning.
As shown in Figure 2, described three-dimensional survey chi by three between two orthogonal leveling ruler be formed by connecting, three described leveling rulers are provided with a level detection device.Three described leveling rulers are respectively the first leveling ruler 1-1, the second leveling ruler 1-2 and the 3rd leveling ruler 1-3, the inner of the inner of described first leveling ruler 1-1, the inner of the second leveling ruler 1-2 and the 3rd leveling ruler 1-3 is fastenedly connected and is integrated, described first leveling ruler 1-1 and the second leveling ruler 1-2 is perpendicular, second leveling ruler 1-2 and the 3rd leveling ruler 1-3 is perpendicular, and the first leveling ruler 1-1 and the 3rd leveling ruler 1-3 is perpendicular; Described first leveling ruler 1-1 and the second leveling ruler 1-2 is positioned in same level, described 3rd leveling ruler 1-3 is in vertically to laying and it is positioned at below the first leveling ruler 1-1 and the second leveling ruler 1-2, described second leveling ruler 1-2 and the 3rd leveling ruler 1-3 is positioned on same vertical plane, and described first leveling ruler 1-1 is positioned at the inner side of the second leveling ruler 1-2 and the 3rd leveling ruler 1-3.The tie point of three described leveling ruler the inners is datum mark.
Composition graphs 3. Fig. 4 and Fig. 5, described contact suspension device comprises carrier cable 4-1.Described compensation system 7 comprises multiple compensating sheave 7-1, multiple described compensating sheave 7-1 carries out from front to back laying and it is all laid in same level, connect as one by compensating rope 7-2 between multiple described compensating sheave 7-1, the compensating sheave 7-1 being positioned at front side in multiple described compensating sheave 7-1 is front side pulley, described front side pulley is be arranged on the fixed pulley on anchor arm 6, the compensating sheave 7-1 being positioned at last side in multiple described compensating sheave 7-1 is rear side pulley, and described rear side pulley is the travelling block be connected with carrier cable 4-1.The hole wall of described Tunnel 3 is provided with multiple leading block 8 that compensation rope 7-2 is led, multiple described leading block 8 from top to bottom carries out laying and it is laid on same vertical plane, and the leading block 8 being positioned at topmost in multiple described leading block 8 is upper sheave.The wheel shaft of described rear side pulley is provided with link 7-4, and described carrier cable 4-1 is arranged on link 7-4; Described one end compensating rope 7-2 is fixed on link 7-4 and its other end is lifted with pendant sticks together block 7-3.
When installing compensation system 7, process is as follows:
Step 201, front side pulley are installed: in step one after anchor arm 6 installation, the described front side pulley level of compensation system 7 be arranged on anchor arm 6.
Step 202, three-dimensional chi of surveying lay: described three-dimensional is surveyed the installed position that chi is laid in current installed ending fitting, and the datum mark making described three-dimensional survey chi is positioned at pulley week side, described front side; Afterwards, adjust the position of the first leveling ruler 1-1 and the second leveling ruler 1-2, make the first leveling ruler 1-1 and the second leveling ruler 1-2 all be in horizontality, and make the second leveling ruler 1-2 be parallel laying with the central lines of track at current installed ending fitting present position place.That is, the second leveling ruler 1-2 lays along line direction.Wherein, wire center refers to the railway center line placed an iron railway in Tunnel 3.
Wherein, when the first leveling ruler 1-1 and the second leveling ruler 1-2 is adjusted, detected by the horizontality of level detection device to the first leveling ruler 1-1 and the second leveling ruler 1-2 set on the first leveling ruler 1-1 and the second leveling ruler 1-2.
Step 203, leading block are located: the first leveling ruler 1-1 in the three-dimensional survey chi utilizing cloth in step 202 to put well and the 3rd leveling ruler 1-3, and vertical plane is determined the installation site of multiple described leading block 8; Further, the setting height(from bottom) of the first leveling ruler 1-1 to described upper sheave is utilized to determine.
Step 204, compensate rope and compensating sheave is installed: the compensation rope 7-2 of compensation system 7 and other compensating sheave 7-1 is installed, and is arranged on link 7-4 by the carrier cable 4-1 hanging osculatory 5.
In the present embodiment, in step 202, the structure of three described leveling rulers is all identical, and three described leveling rulers include straight chi body.Described straight chi body is shrinkage-rule.During actual use, can according to specific needs, the length of described straight chi body be adjusted accordingly.
In step 2, the multiple described leading block 8 of current installed compensation system 7 is all laid on hole, the same side wall of Tunnel 3; Carry out three-dimensional in step 202 and survey chi when laying, the outer end of described first leveling ruler 1-1 is propped up on the Tunnel 3 hole wall withstood on residing for current installed multiple leading block 8.
Actually add man-hour, the xsect of described straight chi body is rectangle, and the lateral wall of described straight chi body is provided with scale mark.
In the present embodiment, the xsect of described straight chi body is square.Further, the cross sectional dimensions of three described leveling rulers is all identical.
During actual use, level detection device described in step 202 is level 2.
In the present embodiment, described level 2 is pipe level, also can adopt the level of other type.
In the present embodiment, when constructing to multiple described anchor section, according to installation position tandem, construct respectively to multiple described anchor section in the direction extending longitudinally along Tunnel 3 before backward, the construction method of multiple described anchor section is all identical; The junction of adjacent two the described anchor sections in front and back shares a described ending fitting, and the ending fitting set by each described anchor section rear and front end is respectively front ending fitting and rear ending fitting.
When constructing to any one anchor section, according to the method described in step one to step 2, ending fitting before current constructed anchor section is installed; Carry out in installation process to described front ending fitting, unwrapping wire is carried out to the osculatory 5 of current constructed anchor section, and by osculatory 5 rear suspension on the rear ending fitting of current constructed anchor section, after described front ending fitting installation, by osculatory 5 front suspension on described front ending fitting.
In the present embodiment, described Tunnel 3 is equipped with railroad track 11, and Tunnel 3 place an iron railway as two-way railway line.Correspondingly, in Tunnel 3, the installation position place of ending fitting is provided with two described ending fittings, two described ending fittings are laid in the left and right sides in Tunnel 3 respectively, and two described ending fittings are respectively the lower-left anchor device being laid in left side in Tunnel 3 and the bottom right anchor device being laid in right side in Tunnel 3, in the anchor device of described lower-left, the multiple described leading block 8 of compensation system 7 is all laid on hole, the left side wall of Tunnel 3, and in the anchor device of described bottom right, the multiple described leading block 8 of compensation system 7 is all laid on hole, the right side wall of Tunnel 3.
During practice of construction, described lower-left anchor device is identical with the installation method of described bottom right anchor device.
In the present embodiment, after compensating rope and compensating sheave installation in step 204, the three-dimensional survey installation site of chi to compensation system 7 also needing to adopt cloth in step 202 to put well is checked.When the installation site of compensation system 7 is checked, surface level need be carried out and check and check with vertical plane.
Carry out surface level when checking, adopt the first leveling ruler 1-1 and the second leveling ruler 1-2, in the horizontal plane the compensation rope 7-2 be connected between described front side pulley and described upper sheave and the compensation rope 7-2 be connected between multiple described compensating sheave 7-1 is checked: when the compensation rope 7-2 be connected between described front side pulley and described upper sheave and the compensation rope 7-2 be connected between multiple described compensating sheave 7-1 is all on same plane S1, and when to be connected to described front side pulley be parallel laying with the compensation rope 7-2 between described upper sheave with the first leveling ruler 1-1, illustrate that the installation site of described upper sheave is accurate, otherwise, need adjust the installation site of described upper sheave, until by the adjustment of the installation site of described upper sheave accurately, wherein, planar S 1 is the first leveling ruler 1-1 with the plane at the second leveling ruler 1-2 place or with the first leveling ruler 1-1 and the plane at the second leveling ruler 1-2 place is the surface level of parallel laying.Wherein, planar S 1 is be the surface level of parallel laying with the first leveling ruler 1-1 and the plane at the second leveling ruler 1-2 place, " be connected to described front side pulley with the compensation rope 7-2 between described upper sheave be parallel laying with the first leveling ruler 1-1 " refer to be connected to compensation rope 7-2 between described front side pulley and described upper sheave the first leveling ruler 1-1 and the second leveling ruler 1-2 projection line in the plane, be parallel laying with the first leveling ruler 1-1.
After the installation site adjustment accurately of described upper sheave, then carry out vertical plane and check.
Carry out vertical plane when checking, adopt the first leveling ruler 1-1 and the 3rd leveling ruler 1-3, vertical plane checks being connected to the compensation rope 7-2 that described upper sheave and pendant stick together between block 7-3: when being connected to described upper sheave and the pendant compensation rope 7-2 sticked together between block 7-3 is on same plane S2, illustrate that the installation site of each leading block 8 in compensation system 7 is all accurate; Otherwise, need adjust the installation site of other leading block 8 in compensation system 7 except described upper sheave, until the installation site of leading block 8 each in compensation system 7 is all adjusted accurately; Wherein, planar S 2 is the first leveling ruler 1-1 with the plane at the 3rd leveling ruler 1-3 place or with the first leveling ruler 1-1 and the plane at the 3rd leveling ruler 1-3 place is the vertical plane of parallel laying.
In the present embodiment, the hole wall of described Tunnel 3 is provided with multiple respectively for the base 9 that multiple described leading block 8 is installed.When carrying out leading block location in step 203, specifically the position of the base 9 installed for multiple described leading block 8 is determined.Multiple described leading block 8 from top to bottom carries out laying and it is laid on same vertical plane, and described anchor arm 6 is fixed on Tunnel 3 top.
In the present embodiment, in described compensation system 7, the quantity of compensating sheave 7-1 is three, three described compensating sheave 7-1 are respectively described front side pulley, middle part pulley and described rear side pulley from front to back, described front side pulley and described middle part pulley are fixed pulley and are connected as one by connecting frame therebetween, and described middle part pulley is between described front side pulley and described rear side pulley.
In the present embodiment, carry out three-dimensional in step 202 and survey chi when laying, the datum mark that described three-dimensional surveys chi is positioned at pulley side, described front side and itself and described front side pulley are laid in same level.
When reality lays three-dimensional survey chi, the datum mark that described three-dimensional surveys chi also can be positioned at below or the top of described front side pulley, and both can be positioned at immediately below the pulley of described front side or directly over, also can be positioned at oblique below or the oblique upper of described front side pulley.
To sum up, when ending fitting is installed, three-dimensional chi of surveying is adopted to carry out three-dimensional measurement, method step is simple, realization is convenient and result of use is good, location due to compensation system during ending fitting 7 is the difficult point of Construction control, if described upper sheave is higher or lower than the height of described front side pulley (i.e. multiple described compensating sheave 7-1), compensating sheave 7-1 is de-groove easily; And when leading block 8 left or right avertence in described front side pulley time, easily cause leading block 8 to take off groove.Nowadays, when adopting Traditional Man line drop method to carry out construction survey, there is many defects and deficiency, can not meet the needs of high-speed electric railway development.
And when adopting three-dimensional survey chi to carry out three-dimensional measurement, effectively can ensure that described upper sheave and described front side pulley are that level is laid, and can ensure that described upper sheave and described front side pulley are in same level, this construction survey method simply, is easily grasped, not easily cause do over again, install after occur partially rubbing and the problem such as de-groove broken string.
In the present embodiment, before anchor arm 6 being installed in step one, first adopt center locating device, the hole wall of Tunnel 3 positions measurement to the center of anchor arm 6, refers to Fig. 7.
Described center locating device comprises the laser plummet 10-2 positioned the center of anchor arm 6 and the total powerstation measured the center of anchor arm 6.
When positioning measurement to the center of anchor arm 6, process is as follows:
Step 101, laser plummet and total powerstation set up: be installed on support by laser plummet 10-2 level, and described support is set up on the ground in Tunnel 3; And, to the center of anchor arm 6 in a beam alignment Tunnel 3 on laser plummet 10-2 is sent, meanwhile, set up described total powerstation, and the prism 10-4 of described total powerstation is laid in below described support, and the lower installation position point to a beam alignment prism 10-4 that laser plummet 10-2 is sent; The installation position point of described prism 10-4 is positioning datum point, described positioning datum point send by laser plummet 10-2 lower to the incident point of a light beam on described ground, to lay in coaxial a light beam down with described a light beam on described, described prism 10-4 is level laying.
Step 102, center location survey: adopt the described total powerstation set up in step 101 to measure the center of anchor arm 6 in Tunnel 3.
Actual when using, be the laser beam that laser plummet 10-2 sends from the bottom to top to a light beam on described, described lower be the laser beam that laser plummet 10-2 from top to bottom sends to a light beam.
In the present embodiment, described laser plummet 10-2 is DJZ2 laser plummet.
Be the laser beam emitted by the upper accurate telescope that hangs down to a light beam on described, its point that aims at the mark (i.e. the center of anchor arm 6).Described lower be the lower laser beam that dot system is emitted by laser plummet 10-2 to a light beam, and utilize this laser beam alignment fiducials point.In the present embodiment, prism 10-4 is laid on described reference point, and that is, described reference point is the installation position point of prism 10-4, be also laser plummet 10-2 send lower to the incident point of a light beam on described ground.Described ground is equipped with railroad track 11.
In the present embodiment, described support is tripod 10-3.
During actual use, described support also can adopt the bracing frame of other type.
In the present embodiment, described center locating device also comprises and to move forward and backward in Tunnel 3 and for the tower wagon 10-6 of the construction survey librarian use that the center of anchor arm 6 marks, by the hand-held holding rod 10-7 of described construction survey personnel and the marker pen being arranged on holding rod 10-7 top, described tower wagon 10-6 is positioned at left side or the right side of described support.
After in step 102, the center position measurement of anchor arm 6 completes, according on described to the incident point of a light beam on Tunnel 3 top board, the described marker pen that the construction survey personnel stood on tower wagon 10-6 utilize holding rod 10-7 and are loaded on holding rod 10-7 top directly draws the center of anchor arm 6.
In the present embodiment, described tower wagon 10-6 is positioned on the left of described support, and described prism 10-4 is positioned at below described support, and described total powerstation props up to be located on described ground and it is positioned on front side of prism 10-4.
Actually add man-hour, described holding rod 10-7 is straight-bar and its length is less than 1m.
In the present embodiment, described holding rod 10-7 is metal tube or plastic conduit.
To sum up, the center of described anchor arm 6 be described on to the incident point of a light beam on Tunnel 3 hole wall (specifically top board).That is, the present invention utilizes laser plummet 10-2 and described total powerstation just directly can measure the center of anchor arm 6, and measurement result is accurate, and deviation is less.
After the center of anchor arm 6 is determined, according on described to the incident point of a light beam on Tunnel 3 top board, the described marker pen that the construction survey personnel stood on tower wagon 10-6 just can utilize holding rod 10-7 and be loaded on holding rod 10-7 top directly draws the center of anchor arm 6.Further, the center of described davit 12 directly can calculate the spacing between central lines of track and anchor arm 6 center after determining.
In the present embodiment, composition graphs 9, is laid with multiple davit 12 for installing bracket in described Tunnel 3, multiple described davit 12 is laid from front to back along the direction extending longitudinally of Tunnel 3.Before installing described davit 12, according to the method described in step 101 to step 102, adopt described center locating device to position measurement to the center of davit 12 in Tunnel 3, refer to Fig. 8.
Actual in when in Tunnel 3, the center of davit 12 positions measurement, first laser plummet 10-2 is set up, need be adjusted by the level of adjustment tripod 10-3 to laser plummet 10-2 during actual erection, laser plummet 10-2 is made to be in horizontality, and laser plummet 10-2 is sent on center to davit 12 described in a beam alignment, meanwhile, set up described total powerstation, and the prism 10-4 of described total powerstation is laid in below tripod 10-3, and the lower installation position point to a beam alignment prism 10-4 that laser plummet 10-2 is sent, afterwards, the center of described davit 12 is directly measured by described total powerstation.The center of described davit 12 be described on to the incident point of a light beam on Tunnel 3 hole wall (specifically top board).That is, the utility model utilizes laser plummet 10-2 and described total powerstation just directly can measure the center of described davit 12, and measurement result is accurate, and deviation is less.After the center of described davit 12 is determined, according on described to the incident point of a light beam on Tunnel 3 top board, the described marker pen that the construction survey personnel stood on tower wagon 10-6 just can utilize holding rod 10-7 and be loaded on holding rod 10-7 top directly draws the center of described davit 12.Further, the center of described davit 12 directly can calculate the spacing between the central lines of track of railroad track 11 and described davit 12 center after determining.
In the present embodiment, in the locating device of described center, the basic parameter of described laser plummet 10-2 is: hang down accurate deviation 1,/50,000 in side; Plate level angle value 20 "/2mm; Wavelength 635mm, laser levels 2 grades, enlargement ratio 25 times.
Composition graphs 6, all be manually main due to traditional Tunnel construction survey, the survey instrument adopted comprises steel tape 11-5, surveyor's staff, bamboo pole, line pendant, marking pen etc., there is no special construction survey instrument, practical operation inconvenience, and construction survey is affected by human factors comparatively large, and measurement accuracy cannot be held, thus can not control survey error well.Because contact net is suspended in tunnel by davit 12, need the position of measuring contact network in tunnel suspender according to line in tunnel position of center line, i.e. the center of davit 12.When adopting the traditional center of construction survey method to davit 12 to determine, the center of davit 12 is first hung out with the line pendant 11-2 that bamboo pole 11-1 has tied up, the center of davit 12 on top, tunnel is drawn again with the marking pen on bamboo pole 11-1, afterwards according to the center of davit 12, make the chassis template of davit 12, and carry out the drilling operation of davit chassis bolt 11-3, davit chassis is fixed on the top board of Tunnel 3 by multiple bolt 11-3.When measuring the center of hung out davit 12, steel tape 11-5 is adopted to measure.After determining the spiro keyhole position on davit chassis, because davit chassis itself and cylinder exist angle, therefore punching requires vertical perforating, ensures pitch-row precise distance.Because the reasons such as deviation, alignment error and material planted by measured deviation, anchor, davit 12 center deviation all may be caused excessive, hang and post center deviation excessive be easy to cause do over again and block of bow collector of electric locomotive and the situation such as adjacent line insulation distance is inadequate, thus accurately determine that the center of davit 12 is crucial steps.When adopting the above-mentioned center of traditional construction measuring method to davit 12 to determine, measuring error is mainly due to operating personnel's fatiguability in measuring process, to mark varnish stain inaccurate (namely can not get to assigned address thus occur deviation) of buying oil, bamboo pole is long easily to bend afterwards, in tunnel, light is bad, because paint point is excessive, paint causes cannot see the factors such as monumented point too much or very little, as there is the situation that monumented point can not find, survey crew should mend survey in time, and the air that in tunnel, crossed construction brings is muddy, machinery exhaust emissions and various dust and noise very easily bring many difficulties to survey crew, survey crew can feel anoxic in air, the thinking of people slows down, induce reaction blunt, directly have influence on accuracy and the reliability of measurement data, easily cause the illusion of survey crew, add that glazed thread is muddy secretly causes the collimation error, survey crew is difficult to find a fixing object of reference, and add the difficulty of measurement, particularly major long tunnel is even more serious.
Usually, when adopting the center of traditional construction survey method to anchor arm 6 to determine, the method adopted is identical with measuring method employed in figure 6.
And when adopting the center of described center locating device to anchor arm 6 and described davit 12 to position measurement, directly can measure the center of anchor arm 6 and described davit 12 with described total powerstation, without the need to measuring with steel tape again.During actual measurement, lower to a beam alignment prism 10-4 by laser plummet 10-2, directly can measure the center of top, tunnel anchor arm 6 and described davit 12, practical operation is very easy, and measuring error is little.During actual measurement, behind the center determining anchor arm 6 and described davit 12, total station survey also can be adopted to go out wire center position, again check with steel tape.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every above embodiment is done according to the technology of the present invention essence any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.

Claims (10)

1. contact network in tunnel casts anchor a construction survey method, contact net of constructing be divided into multiple anchor section from front to back along the direction extending longitudinally of Tunnel (3), be provided with overlap between anchor section described in former and later two; Described overlap comprises ending fitting, described ending fitting comprises supportive device, contact suspension device and compensation system (7), the osculatory (5) of contact net of constructing hang on described supportive device by described contact suspension device, described supportive device is the anchor arm (6) that upper end is fixed on the wall of Tunnel (3) hole, it is characterized in that: when installing described ending fitting, process is as follows:
Step one, supportive device are installed: install the anchor arm (6) of current installed ending fitting;
Step 2, compensation system are installed: install the compensation system (7) of current installed ending fitting, and when installing compensation system (7), adopt three-dimensional chi of surveying to carry out measurement and positioning;
Described three-dimensional survey chi by three between two orthogonal leveling ruler be formed by connecting, three described leveling rulers are provided with a level detection device; Three described leveling rulers are respectively the first leveling ruler (1-1), the second leveling ruler (1-2) and the 3rd leveling ruler (1-3), the inner of the inner of described first leveling ruler (1-1), the inner of the second leveling ruler (1-2) and the 3rd leveling ruler (1-3) is fastenedly connected and is integrated, described first leveling ruler (1-1) is perpendicular with the second leveling ruler (1-2), second leveling ruler (1-2) is perpendicular with the 3rd leveling ruler (1-3), and the first leveling ruler (1-1) is perpendicular with the 3rd leveling ruler (1-3); Described first leveling ruler (1-1) and the second leveling ruler (1-2) are positioned in same level, described 3rd leveling ruler (1-3) is in vertically to laying and it is positioned at below the first leveling ruler (1-1) and the second leveling ruler (1-2), described second leveling ruler (1-2) and the 3rd leveling ruler (1-3) are positioned on same vertical plane, and described first leveling ruler (1-1) is positioned at the inner side of the second leveling ruler (1-2) and the 3rd leveling ruler (1-3); The tie point of three described leveling ruler the inners is datum mark;
Described contact suspension device comprises carrier cable (4-1), described compensation system (7) comprises multiple compensating sheave (7-1), multiple described compensating sheave (7-1) carries out from front to back laying and it is all laid in same level, connect as one by compensating rope (7-2) between multiple described compensating sheave (7-1), the compensating sheave (7-1) being positioned at front side in multiple described compensating sheave (7-1) is front side pulley, described front side pulley is for being arranged on the fixed pulley on anchor arm (6), the compensating sheave (7-1) being positioned at last side in multiple described compensating sheave (7-1) is rear side pulley, described rear side pulley is the travelling block be connected with carrier cable (4-1), the hole wall of described Tunnel (3) is provided with multiple leading block (8) that compensation rope (7-2) is led, multiple described leading block (8) from top to bottom carries out laying and it is laid on same vertical plane, and the leading block (8) being positioned at topmost in multiple described leading block (8) is upper sheave, the wheel shaft of described rear side pulley is provided with link (7-4), described carrier cable (4-1) is arranged on link (7-4), described one end compensating rope (7-2) is fixed on upper and its other end of link (7-4) and is lifted with pendant and sticks together block (7-3),
When installing compensation system (7), process is as follows:
Step 201, front side pulley are installed: in step one after anchor arm (6) installation, be arranged on anchor arm (6) by the described front side pulley level of compensation system (7);
Step 202, three-dimensional chi of surveying lay: described three-dimensional is surveyed the installed position that chi is laid in current installed ending fitting, and the datum mark making described three-dimensional survey chi is positioned at pulley week side, described front side; Afterwards, adjust the position of the first leveling ruler (1-1) and the second leveling ruler (1-2), make the first leveling ruler (1-1) and the second leveling ruler (1-2) all be in horizontality, and make the second leveling ruler (1-2) be parallel laying with the central lines of track at current installed ending fitting present position place;
Wherein, when first leveling ruler (1-1) and the second leveling ruler (1-2) are adjusted, detected by the first leveling ruler (1-1) and the upper set horizontality of level detection device to the first leveling ruler (1-1) and the second leveling ruler (1-2) of the second leveling ruler (1-2);
Step 203, leading block are located: the first leveling ruler (1-1) in the three-dimensional survey chi utilizing cloth in step 202 to put well and the 3rd leveling ruler (1-3), and vertical plane is determined the installation site of multiple described leading block (8); Further, the first leveling ruler (1-1) setting height(from bottom) to described upper sheave is utilized to determine;
Step 204, compensate rope and compensating sheave is installed: the compensation rope (7-2) of compensation system (7) and other compensating sheave (7-1) are installed, and is arranged on link (7-4) by the carrier cable (4-1) hanging osculatory (5).
2. to cast anchor construction survey method according to a kind of contact network in tunnel according to claim 1, it is characterized in that: when multiple described anchor section is constructed, according to installation position tandem, construct respectively to multiple described anchor section in direction extending longitudinally along Tunnel (3) before backward, the construction method of multiple described anchor section is all identical; The junction of adjacent two the described anchor sections in front and back shares a described ending fitting, and the ending fitting set by each described anchor section rear and front end is respectively front ending fitting and rear ending fitting;
When constructing to any one anchor section, according to the method described in step one to step 2, ending fitting before current constructed anchor section is installed; Carry out in installation process to described front ending fitting, unwrapping wire is carried out to the osculatory (5) of current constructed anchor section, and by osculatory (5) rear suspension on the rear ending fitting of current constructed anchor section, after described front ending fitting installation, by osculatory (5) front suspension on described front ending fitting.
3. to cast anchor construction survey method according to a kind of contact network in tunnel described in claim 1 or 2, it is characterized in that: after compensating rope and compensating sheave installation in step 204, the three-dimensional survey installation site of chi to compensation system (7) also needing to adopt cloth in step 202 to put well is checked; When the installation site of compensation system (7) is checked, surface level need be carried out and check and check with vertical plane;
Carry out surface level when checking, adopt the first leveling ruler (1-1) and the second leveling ruler (1-2), in the horizontal plane the compensation rope (7-2) be connected between described front side pulley and described upper sheave and the compensation rope (7-2) be connected between multiple described compensating sheave (7-1) are checked: when the compensation rope (7-2) be connected between described front side pulley and described upper sheave and the compensation rope (7-2) be connected between multiple described compensating sheave (7-1) are all on same plane S1, and be connected to described front side pulley and the compensation rope (7-2) between described upper sheave with the first leveling ruler (1-1) in parallel laying time, illustrate that the installation site of described upper sheave is accurate, otherwise, need adjust the installation site of described upper sheave, until by the adjustment of the installation site of described upper sheave accurately, wherein, planar S 1 is that the first leveling ruler (1-1) is with the plane at the second leveling ruler (1-2) place or be the surface level of parallel laying with the first leveling ruler (1-1) and the plane at the second leveling ruler (1-2) place,
After the installation site adjustment accurately of described upper sheave, then carry out vertical plane and check;
Carry out vertical plane when checking, adopt the first leveling ruler (1-1) and the 3rd leveling ruler (1-3), vertical plane checks being connected to the compensation rope (7-2) that described upper sheave and pendant stick together between block (7-3): when being connected to described upper sheave and the pendant compensation rope (7-2) sticked together between block (7-3) is on same plane S2, illustrate that the installation site of each leading block (8) in compensation system (7) is all accurate; Otherwise, need adjust the installation site of other leading block (8) in compensation system (7) except described upper sheave, until the installation site of each leading block (8) in compensation system (7) is all adjusted accurately; Wherein, planar S 2 is that the first leveling ruler (1-1) is with the plane at the 3rd leveling ruler (1-3) place or be the vertical plane of parallel laying with the first leveling ruler (1-1) and the plane at the 3rd leveling ruler (1-3) place.
4. to cast anchor construction survey method according to a kind of contact network in tunnel described in claim 1 or 2, it is characterized in that: carry out three-dimensional in step 202 and survey chi when laying, the datum mark that described three-dimensional surveys chi is positioned at pulley side, described front side and itself and described front side pulley are laid in same level.
5. to cast anchor construction survey method according to a kind of contact network in tunnel described in claim 1 or 2, it is characterized in that: in step 202, the structure of three described leveling rulers is all identical, and three described leveling rulers include straight chi body; Described straight chi body is shrinkage-rule;
In step 2, the multiple described leading block (8) of current installed compensation system (7) is all laid on hole, the same side wall of Tunnel (3); Carry out three-dimensional in step 202 and survey chi when laying, the outer end of described first leveling ruler (1-1) is propped up Tunnel (3) Dong Bishang withstood on residing for current installed multiple leading block (8).
6. to cast anchor construction survey method according to a kind of contact network in tunnel according to claim 5, it is characterized in that: the xsect of described straight chi body is rectangle, and the lateral wall of described straight chi body is provided with scale mark.
7. to cast anchor construction survey method according to a kind of contact network in tunnel described in claim 1 or 2, it is characterized in that: before in step one, anchor arm (6) being installed, first adopt center locating device, the hole wall of Tunnel (3) positions measurement to the center of anchor arm (6);
Described center locating device comprises the laser plummet (10-2) positioned the center of anchor arm (6) and the total powerstation measured the center of anchor arm (6);
When positioning measurement to the center of anchor arm (6), process is as follows:
Step 101, laser plummet and total powerstation set up: be installed on support by laser plummet (10-2) level, and described support is set up on the ground in Tunnel (3); And, to a center for beam alignment Tunnel (3) interior anchor arm (6) on laser plummet (10-2) is sent, meanwhile, set up described total powerstation, and the prism (10-4) of described total powerstation is laid in below described support, and the lower installation position point to a beam alignment prism (10-4) that laser plummet (10-2) is sent; The installation position point of described prism (10-4) is positioning datum point, described positioning datum point send by laser plummet (10-2) lower to the incident point of a light beam on described ground, to lay in coaxial a light beam down with described a light beam on described, described prism (10-4) is laid in level;
Step 102, center location survey: adopt the center of described total powerstation to Tunnel (3) interior anchor arm (6) of setting up in step 101 to measure.
8. to cast anchor construction survey method according to a kind of contact network in tunnel according to claim 7, it is characterized in that: described center locating device also comprises and to move forward and backward in Tunnel (3) and for the tower wagon (10-6) of the construction survey librarian use that the center of anchor arm (6) marks, by the hand-held holding rod (10-7) of described construction survey personnel and the marker pen being arranged on holding rod (10-7) top, described tower wagon (10-6) is positioned at left side or the right side of described support;
After in step 102, the center position measurement of anchor arm (6) completes, according on described to the incident point of a light beam on Tunnel (3) top board, the described marker pen that the construction survey personnel stood on tower wagon (10-6) utilize holding rod (10-7) and are loaded on holding rod (10-7) top directly draws the center of anchor arm (6).
9. to cast anchor construction survey method according to a kind of contact network in tunnel according to claim 7, it is characterized in that: be laid with multiple davit (12) for installing bracket in described Tunnel (3), multiple described davit (12) is laid from front to back along the direction extending longitudinally of Tunnel (3); Before installing described davit (12), according to the method described in step 101 to step 102, the center of described center locating device to Tunnel (3) interior davit (12) is adopted to position measurement.
10. to cast anchor construction survey method according to a kind of contact network in tunnel described in claim 1 or 2, it is characterized in that: level detection device described in step 202 is level (2).
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