CN103913145A - Crack opening two-direction deformation monitoring structure and measurement method - Google Patents
Crack opening two-direction deformation monitoring structure and measurement method Download PDFInfo
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Abstract
The invention discloses a crack opening two-direction deformation monitoring structure and a measurement method. An upper vertical fixing rod and a lower vertical fixing rod are provided with vertical level bubbles respectively and are buried into the two sides of a monitored crack respectively. A horizontal cross rod is provided with horizontal level bubbles, is connected with the upper vertical fixing rod through a threaded rod and is fixedly connected with an oblique fixing rod. The two ends of a distance measurement sensor are connected with the oblique fixing rod and the lower vertical fixing rod respectively, and the two ends of an angle measurement sensor are connected with the oblique fixing rod and the distance measurement sensor respectively. The crack opening two-direction deformation monitoring structure and the measurement method have the advantages that oblique crack deformation can be accurately divided into vertical deformation and cross deformation, field assembly can be carried out, and the measuring ranges and precision of the distance measurement sensor and the angle measurement sensor can be adjusted according to the position and opening width of the crack.
Description
Technical field
The present invention relates to a kind of monitoring of structures, particularly a kind of crack openings double-deformation monitoring of structures and measuring method, is applicable to the Crack Monitoring project in side slope, embankment, foundation ditch, Tunnel Engineering.
Background technology
The normal crack that occurs various shapes in the engineering constructions such as the high slope Geotechnical Engineering of China, foundation ditch, tunnel and operation process.In engineering, the often important indicator using the opening shape in crack and the penetration of fracture as evaluation engineering safe condition.Because As time goes on opening shape and the penetration of fracture in crack can constantly change, for accurately disclosing the situation of change in crack, some engineerings often need the development and change situation of fracture to monitor.
At present, the instrument that carries out Crack Monitoring in engineering mainly contains little steel ruler, vernier caliper, wedge-shaped feeler gauge, Vernier clearance gage, convergence gauge etc.Little steel ruler, vernier caliper, convergence gauge are by fixed observer point, the distance between periodic observation two observation stations are set in both sides, crack; Wedge-shaped feeler gauge, Vernier clearance gage are by by clearance gauge head inserted into gap, are seated backed off after random, and rider scale is exactly gap size; Joint meter or surface crack meter, it is the upper surface that is fixed on crack by two legs, by the reading situation of change of observation joint meter, determines the deformation of crack openings.Analysis shows, above-mentioned monitoring method can only test out the deformation of crack openings, is difficult to test achievement to be decomposed into level to distortion with vertically to distortion; And monitoring precision is on the low side, be difficult to meet the demand of Important building Crack Monitoring.
A kind of ground fissure GPS monitoring technology, first bury a pair of GPS Crack Monitoring point underground in the both sides in crack, every place, then measure the initial coordinate of each Crack Monitoring point, again periodic monitoring is carried out in each monitoring point, due to cycle length long (general half a year once), be unsuitable for drawing as early as possible the engineering of scheme.Visible, though this monitoring mode can quantize according to the variation fracture opening double-deformation of monitoring point coordinate, Monitoring Data is difficult for obtaining, and monitoring expense and maintenance cost higher.
As shown in Figure 1, existing a kind of device of monitoring slope crack distortion on the market, this device mainly comprises Vertical Pile (1) and is fixedly connected with ring (2) and convergence gauge (3), two Vertical Piles (1) stand on respectively two ends, crack, Vertical Pile top is equipped with and is fixedly connected with ring (2), and convergence gauge (3) two ends are connected on the abutment ring on two Vertical Piles (1) stake top.Change to analyze the situation of change in crack by the reading on convergence gauge (3).Although the method facilitates feasible, but it can only judge the deformation of crack entirety, can not imbody crack respectively in the horizontal direction with the distortion situation of vertical direction, and the present invention can by analytical calculation specifically draw crack respectively in the horizontal direction with vertical direction on distortion.
As shown in Figure 2, existing a kind of three-dimensional crack displacement monitoring device on the market, this device comprises by three orthogonal displacement transducers (4), observation crack is at the deformation of three directions, but because this device lacks corresponding Direction Control Aid, three Direction distortions that record are difficult to be converted into accurately crack in vertical, transversely deforming amount; Three Direction distortions that equipment observes are simultaneously difficult to be controlled at (corresponding adjacent different observation stations often) on same gap observation section, affect the correctness of later stage theoretical analysis; And equipment installs and be subject to field condition restriction more, assembling difficulty is large, is unfavorable for field maintemance.
In sum, although have instrument, the method that some can be used for civil engineering work Crack Monitoring in engineering, various monitoring methods have obtained good Crack Monitoring effect under suitable engineering background, but still there is certain deficiency, be mainly reflected in: little steel ruler, vernier caliper, wedge-shaped feeler gauge, Vernier clearance gage, the accuracy of convergence gauge Monitoring Data is on the low side, and be difficult to reflect the double-deformation rule situation in crack; Joint meter or surface crack meter are applicable to the more smooth engineering structure monitoring of surface ratio, are difficult to equally reflect the double-deformation rule in monitored crack; Though the double-deformation that ground fissure GPS monitoring can fracture is monitored, structure monitoring cost of equipment is high, maintenance difficulties is large, accuracy is on the low side.
Given this, for realizing the monitoring of fracture opening double-deformation, improve the accuracy of crack field monitoring, the better variation tendency in reflection crack, needs badly at present and invents a kind of novel a kind of crack openings double-deformation monitoring of structures and measuring method that fracture opening double-deformation is monitored, monitoring of structures is simple, easy to operate, accuracy is high that realize.
Summary of the invention
The object of the present invention is to provide a kind of crack openings double-deformation monitoring device and monitoring method, the method is simple in structure, applicability is wide, dependable performance, can accurately monitor.Can monitor the level of crack openings and the crack real-time monitoring system of vertical deflection simultaneously
For realizing above-mentioned monitoring object, the present invention by the following technical solutions:
A kind of crack openings double-deformation monitoring of structures, it comprises the vertical fixed bar in top, vertical air level, horizontal cross bar, horizontal levelling bubble, oblique fixed bar, angular measurement sensor, the vertical fixed bar of distance measuring sensor and bottom; It is characterized in that: on the vertical fixed bar of the vertical fixed bar in top and bottom, vertical air level is all set, and the vertical fixed bar of vertical top fixed bar and bottom is embedded in respectively to the both sides in monitoring crack; Horizontal levelling bubble is set on horizontal cross bar, is connected by screw rod with the vertical fixed bar in top; Oblique fixed bar is fixedly connected with horizontal cross bar; The two ends of distance measuring sensor are connected with the vertical fixed bar of oblique fixed bar and bottom respectively; The two ends of angular measurement sensor are connected with oblique fixed bar and distance measuring sensor respectively.
The vertical fixed bar in top of the present invention is made up of two parts, and wherein top is a rectangular slab, and on rectangular slab, the reserved anchor hole being connected with horizontal cross bar, arranges vertical bar in the bottom of rectangular slab, and vertically the bottom of bar is circle (rib) cone tip shape; Rectangular slab adopts same material with vertical bar, adopts alloy material or steel or rigid plastic, is bolted or welds or paste connection.
The vertical fixed bar in bottom of the present invention forms by two parts, and wherein top is a rectangular slab, and the anchor hole that on rectangular slab, reserved distance measuring sensor extension connects, arranges vertical bar in the bottom of rectangular slab, and vertically the bottom of bar is circle (rib) cone tip shape; Rectangular slab adopts same material with vertical bar, adopts alloy material or steel or rigid plastic, is bolted or welds or paste connection.
Between horizontal cross bar of the present invention and oblique fixed bar, angle is 30 ° or 45 °, and both are integral prefabricated forms, and its material adopts alloy material or steel or rigid plastic, and wherein horizontal cross bar is fixedly connected with by anchor hole bolt with the vertical bar fixed bar in top; The rotating shaft being connected with distance measuring sensor is set on oblique fixed bar.
Angular measurement sensor of the present invention two ends are fixedly connected with anchor connection point reserved on oblique fixed bar and distance measuring sensor respectively, and the distance of rotating shaft on oblique fixed bar is put in anchor connection can be according to field condition adjustment.
Distance measuring sensor of the present invention one end is connected by rotating shaft with oblique fixed bar, and the other end is fixedly connected with the reserved connecting hole of the vertical fixed bar in bottom, and on distance measuring sensor, appropriate location arranges the anchor connection point being connected with angular measurement sensor.
Distance measuring sensor of the present invention and angular measurement sensor can adopt vibrating string type sensor or resistance sensor, and data can proportion readout instrument or data collecting card collection.
Distance measuring sensor of the present invention can be according to the width in monitoring crack, and distance between the vertical fixed bar of the vertical fixed bar in top and bottom, and the lengthening steel disc of certain length can be set on the front end of the extension of sensor.
A measuring method for crack openings double-deformation monitoring of structures, is characterized in that method step is as follows:
1) measure front preparation: observe crack surrounding environment, process measure field, determine the concrete burial place of the vertical fixed bar in top and the vertical fixed bar in bottom, guarantee that the vertical fixed bar of the vertical fixed bar in top and bottom, horizontal cross bar are in same plane simultaneously, and vertical with fracture strike;
2) bury vertical fixed bar underground: be drilled with the anchor hole of appropriate depth at select location, the vertical fixed bar of vertical top fixed bar and bottom is vertically inserted to anchor hole, the air level of making every effort to vertical fixed bar is placed in the middle, then pours into Fast Setting Cement Slurry or cementing agent in space;
3) connect horizontal cross bar and the vertical fixed bar in top: after the vertical fixed bar of the vertical fixed bar in top and bottom has been buried underground, horizontal cross bar is fixedly connected with together with the vertical fixed bar in oblique fixed bar and top, should guarantee that horizontal cross bar air level is placed in the middle, even horizontal cross bar level;
4) connecting sensor: distance measuring sensor two ends are connected respectively on the reserved connecting hole of the vertical fixed bar of rotating shaft and bottom of oblique fixed bar, then the two ends of angular measurement sensor are fixedly attached to respectively to the tie point of oblique fixed bar and distance measuring sensor;
5) adjust: after connecting sensor, on eye-level weighing apparatus bar, whether air level moves, and suitably adjusts the tie point of the vertical fixed bar of water balance bar and top, makes to fix after its level;
6) reading: after fixing total, read respectively oblique fixed bar and the distance measuring sensor connection rotating shaft distance to oblique fixed bar and angular measurement sensor anchor connection point and distance measuring sensor and distance measuring sensor anchor connection point by vernier caliper; Read the initial reading of distance measuring sensor and angular measurement sensor by readout instrument;
7) data processing: the reading that measures respectively angular measurement sensor and distance measuring sensor according to setting monitoring frequency, calculate the angle of oblique fixed bar and distance measuring sensor according to the reader of angular measurement sensor, and then calculate distance measuring sensor and level to, vertical angle; First change reading situation according to distance measuring sensor, calculate crack diagonal distortion amount, then calculate to obtain level, the vertical deflection in monitoring crack according to the angle of oblique fixed bar and distance measuring sensor.
Advantage of the present invention: (1) tests oblique apart from deflection between two monitoring points by distance measuring sensor, by the elongation of test angular measurement sensor, distance in conjunction with oblique fixed bar and distance measuring sensor connection rotating shaft to oblique fixed bar and angular measurement sensor anchor connection point and distance measuring sensor and distance measuring sensor anchor connection point, can calculate the angle of distance measuring sensor and vertical direction and horizontal direction, and then the level that calculates crack is to, vertical double-deformation amount; (2) observation is convenient, can carry out Single Point Surveying by frequency readings instrument according to actual demands of engineering, also can carry out Continuous Observation by data collecting card, meets the needs of dissimilar engineering cracks monitoring; (3) textural association is simple, not only can carry out scene combination, and can adjust according to crack location, A/F range and the precision of distance measuring sensor and angular measurement sensor.
Accompanying drawing explanation
Fig. 1 is a kind of device of monitoring slope crack distortion.
Fig. 2 is a kind of three-dimensional crack displacement monitoring device.
Fig. 3 is structural representation of the present invention.
Fig. 4 is structural member connection diagram of the present invention.
In figure: 1, Vertical Pile, 2, with be fixedly connected with ring, 3, convergence gauge, 4, displacement transducer, 5, the vertical fixed bar in top, 6, vertically air level, 7, horizontal cross bar, 8, horizontal levelling bubble, 9, oblique fixed bar, 10, angular measurement sensor, 11, angular measurement sensor extension, 12, distance measuring sensor, 13, distance measuring sensor extension, 14, the vertical fixed bar in bottom, 15, monitoring crack, 16, the vertical fixed bar in top and horizontal cross bar coupling bolt, 17, oblique fixed bar and distance measuring sensor connection rotating shaft, 18, oblique fixed bar and angular measurement sensor anchor connection point, 19, distance measuring sensor and distance measuring sensor anchor connection point.
Embodiment
Below in conjunction with accompanying drawing explanation, embodiments of the invention are described in further detail, but the present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof, all should list protection scope of the present invention in.
Vertically fixed bar burial and construction technical requirement, the requirement of air level installation Technology etc., be not repeated in present embodiment, and emphasis is set forth the embodiment that the present invention relates to structure.
Shown in Fig. 3, Fig. 4, it comprises the vertical fixed bar 5 in top, vertical air level 6, horizontal cross bar 7, horizontal levelling bubble 8, oblique fixed bar 9, angular measurement sensor 10, the vertical fixed bar 14 of distance measuring sensor 12 and bottom crack openings double-deformation monitoring of structures; It is characterized in that: on the vertical fixed bar 14 of the vertical fixed bar 5 in top and bottom, vertical air level 6 is all set, and the vertical fixed bar 14 of vertical top fixed bar 5 and bottom is embedded in respectively to the both sides in monitoring crack 15; Horizontal levelling bubble 8 is set on horizontal cross bar 7, is connected by screw rod with the vertical fixed bar 5 in top; Oblique fixed bar 9 is fixedly connected with horizontal cross bar 7; The two ends of distance measuring sensor 12 are connected with the vertical fixed bar 14 of oblique fixed bar 9 and bottom respectively; The two ends of angular measurement sensor 10 are connected with oblique fixed bar 9 and distance measuring sensor 12 respectively, and the crack of required monitoring is positioned at a High Cut Slope (soil-slope), and the A/F in monitoring crack is 40mm.
The vertical fixed bar of the vertical fixed bar in described top (5) and bottom (14) is by two parts composition, and wherein top is a rectangular slab, the wide 30mm of rectangular slab, high 60mm, thick 15mm; Reserved 2 anchor holes that are connected with horizontal cross bar (7) or distance measuring sensor extension (13) on rectangular slab, anchor hole diameter is 9mm, lays along rectangular slab diagonal angle; The vertical bar of rectangle is set in the bottom of rectangular slab, and the bar length of side is 30mm; Vertically the bottom of bar arranges cone point, high 40mm; Rectangular slab adopts steel rolling to form with vertical bar, and strength classes of structural steel is HPB235.
Described vertical air level 6 adopts everything level, and it is of a size of 60 × 10mm, and precision is 15 points/2mm, should guarantee that vertical air level 6 and vertical fixed bar are vertical when installation.
Between described horizontal cross bar 7 and oblique fixed bar 9, angle is 45 °, and both are integral prefabricated forms, and adopts steel rolling to form, and strength classes of structural steel is HPB235; Wherein horizontal cross bar 7 is long is 90mm, and section is wide is 30mm, and front end is a rectangular slab, the wide 30mm of rectangular slab, long 60mm, thick 15mm, and be fixedly connected with by anchor hole bolt 16 with the rectangular slab of the vertical bar fixed bar 5 in top; The long 200mm of oblique fixed bar 9, section is wide is 30mm, and the rotating shaft 17 being connected with distance measuring sensor 12 is set on oblique fixed bar 9; Oblique fixed bar and distance measuring sensor connection rotating shaft 17 are cylindrical, and one end and oblique fixed bar are welded to connect, and the other end arranges circular port.
Described horizontal levelling bubble 8 adopts high precision level device, and copper material surface degree Le, is of a size of 22 × 10 × 18mm precision: 30 points/2mm.
Described angular measurement sensor (10) and distance measuring sensor (12) all adopt thread-vibration type device for sensing displacement, and data read by frequency readings instrument, and the range of angular measurement sensor (10) is 50mm, and the range of distance measuring sensor (12) is 100mm.
Described angular measurement sensor (10) two ends are fixedly connected with the upper reserved anchor connection point (19) of oblique fixed bar (9) and distance measuring sensor (12) respectively, and on the oblique fixed bar of anchor connection point (19) distance, the distance of rotating shaft (17) is 60mm.
Described distance measuring sensor (12) one end is connected by rotating shaft (17) with oblique fixed bar (9), the other end is fixedly connected with the reserved connecting hole of the vertical fixed bar in bottom (14), at the upper distance end points 50mm of distance measuring sensor (12) place, the anchor connection point (19) being connected with angular measurement sensor (10) is set.
It is 220mm that the vertical fixed bar in described top (5) is buried spacing underground with the vertical fixed bar in bottom (14).
It is " 4-0.7x70PM ± tooth long 35 that the vertical fixed bar in described top and horizontal cross bar coupling bolt 15, oblique fixed bar and angular measurement sensor anchor connection point 17, distance measuring sensor and distance measuring sensor anchor connection point 18 all adopt screw specification.
The measuring method of described a kind of crack openings double-deformation monitoring of structures, mainly comprises following monitoring step:
1) measure front preparation: observe crack surrounding environment, process measure field, determine the concrete burial place of the vertical fixed bar of the vertical fixed bar in top (5) and bottom (14), guarantee that the vertical fixed bar of the vertical fixed bar in top (5) and bottom (14), horizontal cross bar (7) are in same plane simultaneously, and vertical with fracture strike.
2) bury vertical fixed bar underground: the anchor hole that is drilled with appropriate depth at select location, the vertical fixed bar of vertical top fixed bar (5) and bottom (14) is vertically inserted to anchor hole, the air level of making every effort to vertical fixed bar is placed in the middle, then pours into Fast Setting Cement Slurry or cementing agent in space.
3) connect horizontal cross bar (7) and the vertical fixed bar in top (5): after the vertical fixed bar 10 of the vertical fixed bar 5 in top and bottom has been buried underground, horizontal cross bar (7) is fixedly connected with the vertical fixed bar in top (5) together with oblique fixed bar (9), should guarantee that horizontal levelling bubble (8) is placed in the middle, even horizontal cross bar (7) level.
4) connecting sensor: distance measuring sensor (12) two ends are connected respectively on the reserved connecting hole of the vertical fixed bar of rotating shaft (17) and bottom (14) of oblique fixed bar, then the two ends of angular measurement sensor (10) are fixedly attached to respectively to tie point (18) and (19) of oblique fixed bar (9) and distance measuring sensor (12).
5) adjust: after connecting sensor, on eye-level weighing apparatus bar, whether air level moves, and suitably adjusts the tie point of the vertical fixed bar of water balance bar (7) and top (5), makes to fix after its level.
6) reading: after fixing total, read respectively oblique fixed bar and distance measuring sensor connection rotating shaft (17) distance to oblique fixed bar and angular measurement sensor anchor connection point (18) and distance measuring sensor and distance measuring sensor anchor connection point (19) by vernier caliper; Read the initial reading of distance measuring sensor (12) and angular measurement sensor (10) by readout instrument.
7) data processing: the reading that measures respectively angular measurement sensor (10) and distance measuring sensor (12) according to setting monitoring frequency, calculate the angle of oblique fixed bar (9) and distance measuring sensor (12) according to the reader of angular measurement sensor (10), and then calculate distance measuring sensor (12) and level to, vertical angle; First change reading situation according to distance measuring sensor (12), calculate crack diagonal distortion amount, then this calculates to obtain level, the vertical deflection in monitoring crack (15) according to the angle of oblique fixed bar (9) and distance measuring sensor (12).
Claims (9)
1. a crack openings double-deformation monitoring of structures, it comprises the vertical fixed bar in top, vertical air level, horizontal cross bar, horizontal levelling bubble, oblique fixed bar, angular measurement sensor, the vertical fixed bar of distance measuring sensor and bottom; It is characterized in that: on the vertical fixed bar of the vertical fixed bar in top and bottom, vertical air level is all set, and the vertical fixed bar of vertical top fixed bar and bottom is embedded in respectively to the both sides in monitoring crack; Horizontal levelling bubble is set on horizontal cross bar, is connected by screw rod with the vertical fixed bar in top; Oblique fixed bar is fixedly connected with horizontal cross bar; The two ends of distance measuring sensor are connected with the vertical fixed bar of oblique fixed bar and bottom respectively; The two ends of angular measurement sensor are connected with oblique fixed bar and distance measuring sensor respectively.
2. a kind of crack openings double-deformation monitoring of structures according to claim 1, it is characterized in that: the vertical fixed bar in described top is made up of two parts, wherein top is a rectangular slab, the reserved anchor hole being connected with horizontal cross bar on rectangular slab, in the bottom of rectangular slab, vertical bar is set, vertically the bottom of bar is circle (rib) cone tip shape; Rectangular slab adopts same material with vertical bar, adopts alloy material or steel or rigid plastic, is bolted or welds or paste connection.
3. a kind of crack openings double-deformation monitoring of structures according to claim 1, it is characterized in that: the vertical fixed bar in described bottom forms by two parts, wherein top is a rectangular slab, the anchor hole that on rectangular slab, reserved distance measuring sensor extension connects, in the bottom of rectangular slab, vertical bar is set, vertically the bottom of bar is circle (rib) cone tip shape; Rectangular slab is bolted or welds or paste with vertical bar and is connected, and can adopt alloy material or steel or rigid plastic.
4. a kind of crack openings double-deformation monitoring of structures according to claim 1, it is characterized in that: between described horizontal cross bar and oblique fixed bar, angle is 30 ° or 45 °, both are integral prefabricated forms, its material adopts alloy material or steel or rigid plastic, and wherein horizontal cross bar is fixedly connected with by anchor hole bolt with the vertical bar fixed bar in top; The rotating shaft being connected with distance measuring sensor is set on oblique fixed bar.
5. a kind of crack openings double-deformation monitoring of structures according to claim 1, it is characterized in that: described angular measurement sensor two ends are fixedly connected with anchor connection point reserved on oblique fixed bar and distance measuring sensor respectively, the distance of rotating shaft on oblique fixed bar is put in anchor connection can be according to field condition adjustment.
6. a kind of crack openings double-deformation monitoring of structures according to claim 1, it is characterized in that: described distance measuring sensor one end is connected by rotating shaft with oblique fixed bar, the other end is fixedly connected with the reserved connecting hole of the vertical fixed bar in bottom, and on distance measuring sensor, appropriate location arranges the anchor connection point being connected with angular measurement sensor.
7. a kind of crack openings double-deformation monitoring of structures according to claim 1, is characterized in that: described distance measuring sensor and angular measurement sensor can adopt vibrating string type sensor or resistance sensor, and data can proportion readout instrument or data collecting card collection.
8. a kind of crack openings double-deformation monitoring of structures according to claim 1, it is characterized in that: described distance measuring sensor can be according to the width in monitoring crack, and distance between the vertical fixed bar of the vertical fixed bar in top and bottom, the lengthening steel disc of certain length can be set on the front end of the extension of sensor.
9. a measuring method for crack openings double-deformation monitoring of structures according to claim 1, is characterized in that method step is as follows:
1) measure front preparation: observe crack surrounding environment, process measure field, determine the concrete burial place of the vertical fixed bar in top and the vertical fixed bar in bottom, guarantee that the vertical fixed bar of the vertical fixed bar in top and bottom, horizontal cross bar are in same plane simultaneously, and vertical with fracture strike;
2) bury vertical fixed bar underground: be drilled with the anchor hole of appropriate depth at select location, the vertical fixed bar of vertical top fixed bar and bottom is vertically inserted to anchor hole, the air level of making every effort to vertical fixed bar is placed in the middle, then pours into Fast Setting Cement Slurry or cementing agent in space;
3) connect horizontal cross bar and the vertical fixed bar in top: after the vertical fixed bar of the vertical fixed bar in top and bottom has been buried underground, horizontal cross bar is fixedly connected with together with the vertical fixed bar in oblique fixed bar and top, should guarantee that horizontal cross bar air level is placed in the middle, even horizontal cross bar level;
4) connecting sensor: distance measuring sensor two ends are connected respectively on the reserved connecting hole of the vertical fixed bar of rotating shaft and bottom of oblique fixed bar, then the two ends of angular measurement sensor are fixedly attached to respectively to the tie point of oblique fixed bar and distance measuring sensor;
5) adjust: after connecting sensor, on eye-level weighing apparatus bar, whether air level moves, and suitably adjusts the tie point of the vertical fixed bar of water balance bar and top, makes to fix after its level;
6) reading: after fixing total, read respectively oblique fixed bar and the distance measuring sensor connection rotating shaft distance to oblique fixed bar and angular measurement sensor anchor connection point and distance measuring sensor and distance measuring sensor anchor connection point by vernier caliper; Read the initial reading of distance measuring sensor and angular measurement sensor by readout instrument;
7) data processing: the reading that measures respectively angular measurement sensor and distance measuring sensor according to setting monitoring frequency, calculate the angle of oblique fixed bar and distance measuring sensor according to the reader of angular measurement sensor, and then calculate distance measuring sensor and level to, vertical angle; First change reading situation according to distance measuring sensor, calculate crack diagonal distortion amount, then calculate to obtain level, the vertical deflection in monitoring crack according to the angle of oblique fixed bar and distance measuring sensor.
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