CN103913145B - A kind of crack openings double-deformation monitoring of structures and measuring method - Google Patents

A kind of crack openings double-deformation monitoring of structures and measuring method Download PDF

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Publication number
CN103913145B
CN103913145B CN201410150190.5A CN201410150190A CN103913145B CN 103913145 B CN103913145 B CN 103913145B CN 201410150190 A CN201410150190 A CN 201410150190A CN 103913145 B CN103913145 B CN 103913145B
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bar
vertical
fixing bar
fixing
distance measuring
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CN103913145A (en
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韩尚宇
雷金波
明扬
谈宜群
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Nanchang Hangkong University
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Abstract

A kind of crack openings double-deformation monitoring of structures and measuring method, the fixing bar of Upper vertical and lower vertical are fixed and are respectively provided with vertical air level on bar, and fixing for Upper vertical bar and the fixing bar of lower vertical are embedded in the both sides in monitoring crack respectively;Horizontal cross bar arranges horizontal levelling bubble, is connected by screw rod with the fixing bar of Upper vertical;Oblique fixing bar is fixing with horizontal cross bar to be connected;The two ends of distance measuring sensor are connected with the fixing bar of oblique fixing bar and lower vertical respectively;The two ends of angular measurement sensor are connected with oblique fixing bar and distance measuring sensor respectively。Advantages of the present invention: crack diagonal distortion can accurately be decomposed into vertical deformation and transversely deforming, not only can carry out field combinations, and can according to the range of crack location, A/F adjustment distance measuring sensor and angular measurement sensor and precision。

Description

A kind of crack openings double-deformation monitoring of structures and measuring method
Technical field
The present invention relates to a kind of monitoring of structures, particularly to a kind of crack openings double-deformation monitoring of structures and measuring method, it is adaptable to the Crack Monitoring project in side slope, embankment, foundation ditch, Tunnel Engineering。
Background technology
The engineering constructions such as the high slope Geotechnical Engineering of China, foundation ditch, tunnel and operation process often occur variously-shaped crack。In engineering, often using important indicator as evaluation engineering safe condition of the opening shape in crack and the penetration of fracture。Owing to As time goes on opening shape and the penetration of fracture in crack can be continually changing, for accurately disclosing the situation of change in crack, some engineerings often need the development and change situation of fracture to be monitored。
At present, the instrument carrying out Crack Monitoring in engineering mainly has little steel ruler, slide gauge, wedge-shaped feeler gauge, Vernier clearance gage, convergence gauge etc.。Little steel ruler, slide gauge, convergence gauge are by arranging fixed observer point, the distance between periodic observation two observation station in both sides, crack;Wedge-shaped feeler gauge, Vernier clearance gage are that rider scale is exactly gap size by clearance gauge head inserted into gap, being seated backed off after random;Joint meter or surface crack meter, it is made by two legs and is fixed on the upper surface in crack, by observing the reading situation of change of joint meter, it is determined that the deformation of crack openings。Analysis shows, above-mentioned monitoring method can only test out the deformation of crack openings, it is difficult to the level that test achievement is decomposed into is to deformation with vertically to deformation;And monitoring precision is on the low side, it is difficult to meet the demand of Important building Crack Monitoring。
A kind of ground fissure GPS monitoring technology, first bury a pair GPS Crack Monitoring point underground in the both sides often locating crack, then measure the initial coordinate of each Crack Monitoring point, more each monitoring point is carried out periodic monitoring, due to cycle time long (general half a year is once), it is unsuitable for the engineering needing to draw scheme as early as possible。Visible, though this monitoring mode can quantify according to the change fracture opening double-deformation of monitoring point coordinate, but Monitoring Data not easily obtains, and monitoring expense and maintenance cost higher。
As shown in Figure 1, existing a kind of device monitoring slope crack deformation on the market, this device mainly includes Vertical Pile (1) and fixing connection ring (2) and convergence gauge (3), two Vertical Piles (1) stand on two ends, crack respectively, Vertical Pile top is equipped with fixing connection ring (2), and convergence gauge (3) two ends are connected on the connection ring on two Vertical Pile (1) stake tops。The situation of change analyzing crack is changed by the reading on convergence gauge (3)。Although the method facilitates feasible, but it can only judge the deformation that crack is overall, can not specifically embody crack difference deformation condition both horizontally and vertically, and the present invention can pass through analytical calculation and specifically draw the deformation in the horizontal direction and the vertical direction of crack difference。
As shown in Figure 2, existing a kind of three-dimensional crack displacement monitoring device on the market, this device includes by three orthogonal displacement transducers (4), the observation crack deformation in three directions, but owing to this device lacks corresponding Direction Control Aid, three Direction distortions recorded are difficult to be converted into crack accurately in vertical, transversely deforming amount;Three Direction distortions that equipment observes simultaneously are difficult to control on same gap observation section (different observation stations corresponding adjacent often), affect the correctness of later stage theory analysis;And equipment installation is limited more by field condition, assembles difficulty big, is unfavorable for on-site maintenance。
In sum, although engineering having some can be used for the instrument of civil engineering Crack Monitoring, method, various monitoring methods achieve good Crack Monitoring effect under suitable engineering background, but still suffer from certain deficiency, it is mainly reflected in: little steel ruler, slide gauge, wedge-shaped feeler gauge, Vernier clearance gage, convergence gauge Monitoring Data accuracy is on the low side, and is difficult to the double-deformation rule situation in reflection crack;Joint meter or surface crack meter are applicable to the engineering structure monitoring that surface ratio is more smooth, are difficult to reflect the double-deformation rule in monitored crack equally;Though ground fissure GPS monitoring can the double-deformation of fracture be monitored, but structure monitoring cost of equipment is high, maintenance difficulties is big, accuracy is on the low side。
Given this, for realizing the monitoring of fracture opening double-deformation, improve the accuracy of crack field monitoring, better reflect the variation tendency in crack, need invention a kind of realizes the monitoring of fracture opening double-deformation, monitoring of structures is simple, easy to operate, accuracy is high novel a kind of crack openings double-deformation monitoring of structures and measuring method at present badly。
Summary of the invention
It is an object of the invention to provide a kind of crack openings double-deformation monitoring device and monitoring method, the method simple in construction, the suitability are wide, dependable performance, can accurate measurements。The crack real-time monitoring system of the horizontally and vertically deflection of crack openings can be monitored simultaneously
For realizing above-mentioned monitoring purpose, the present invention by the following technical solutions:
A kind of crack openings double-deformation monitoring of structures, it includes the fixing bar of Upper vertical, vertical air level, horizontal cross bar, horizontal levelling bubble, oblique fixing bar, angular measurement sensor, distance measuring sensor and the fixing bar of lower vertical;It is characterized in that: the fixing bar of Upper vertical and lower vertical are fixed and be respectively provided with vertical air level on bar, and fixing for Upper vertical bar and the fixing bar of lower vertical are embedded in respectively the both sides in monitoring crack;Horizontal cross bar arranges horizontal levelling bubble, is connected by screw rod with the fixing bar of Upper vertical;Oblique fixing bar is fixing with horizontal cross bar to be connected;The two ends of distance measuring sensor are connected with the fixing bar of oblique fixing bar and lower vertical respectively;The two ends of angular measurement sensor are connected with oblique fixing bar and distance measuring sensor respectively。
The fixing bar of Upper vertical 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 the bottom of vertical bar is that circular cone is pointed;Rectangular slab material identical with vertical bar employing, adopts alloy material or steel or rigid plastics, is bolted or welds or paste connection。
The fixing bar of lower vertical 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 the bottom of vertical bar is that circular cone is pointed;Rectangular slab material identical with vertical bar employing, adopts alloy material or steel or rigid plastics, is bolted or welds or paste connection。
Between horizontal cross bar of the present invention and oblique fixing bar, angle is 30 ° or 45 °, and both are integral prefabricated forms, and its material adopts alloy material or steel or rigid plastics, and wherein horizontal cross bar is connected by anchor hole bolt is fixing with the fixing bar of Upper vertical;Oblique fixing bar arranges the rotating shaft being connected with distance measuring sensor。
Angular measurement sensor two ends of the present invention are fixing with anchor connection point reserved on oblique fixing bar and distance measuring sensor respectively to be connected, and anchor connection point can according to field condition adjustment to the distance of rotating shaft on oblique fixing bar。
Distance measuring sensor one end of the present invention is connected by rotating shaft with oblique fixing bar, and the other end is fixing with the reserved connecting hole of the fixing bar of lower vertical to be connected, 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 adopt frequency readings instrument or data collecting card to collect。
Distance measuring sensor of the present invention can according to the width in monitoring crack, and the distance between the fixing bar of Upper vertical and the fixing bar of lower vertical arranges the lengthening steel disc of certain length on the front end of the extension of sensor。
The measuring method of a kind of crack openings double-deformation monitoring of structures, it is characterised in that method step is as follows:
1) prepare before measuring: observe crack surrounding, process measure field, determine the fixing bar of Upper vertical and the concrete burial place of the fixing bar of lower vertical, guarantee that the fixing bar of Upper vertical and lower vertical fixing bar, horizontal cross bar are in approximately the same plane simultaneously, and vertical with fracture strike;
2) burying vertically fixing bar underground: be drilled with the anchor hole of appropriate depth at select location, fixing for Upper vertical bar and the fixing bar of lower vertical are inserted vertically into anchor hole, the air level making every effort to vertically fix bar is placed in the middle, then irrigates Fast Setting Cement Slurry or binding agent in space;
3) horizontal cross bar and the fixing bar of Upper vertical are connected: after the fixing bar of Upper vertical and the fixing bar of lower vertical have been buried underground, horizontal cross bar is connected together with the fixing bar of oblique fixing bar and Upper vertical is fixing, it is ensured that horizontal cross bar air level is placed in the middle, even if horizontal cross bar level;
4) sensor is connected: be connected respectively at distance measuring sensor two ends on the rotating shaft of oblique fixing bar and the reserved connecting hole of the fixing bar of lower vertical, then the two ends of angular measurement sensor are respectively fixedly connected with the junction point of oblique fixing bar and distance measuring sensor;
5) adjust: after connecting sensor, on eye-level cross bar, whether air level moves, suitably adjust horizontal cross bar and the junction point of the fixing bar of Upper vertical so that it is fixing after level;
6) reading: after fixing total, reads the distance of oblique fixing bar and distance measuring sensor connection rotating shaft to oblique fixing bar with angular measurement sensor anchor connection point and angular measurement sensor and distance measuring sensor anchor connection point respectively by slide gauge;The initial reading of distance measuring sensor and angular measurement sensor is read by readout instrument;
7) data process: measure the reading of angular measurement sensor and distance measuring sensor respectively according to setting monitoring frequency, reader according to angular measurement sensor calculates the angle of oblique fixing bar and distance measuring sensor, and then calculates distance measuring sensor and level to, vertical angle;First changing reading situation according to distance measuring sensor, calculate crack diagonal distortion amount, the angle further according to oblique fixing bar Yu distance measuring sensor calculates to obtain the monitoring level in crack, vertical deflection。
Advantages of the present invention: (1) tests the oblique distance deflection between two monitoring points by distance measuring sensor, by testing the elongation of angular measurement sensor, distance in conjunction with oblique fixing bar with distance measuring sensor connection rotating shaft to oblique fixing bar with angular measurement sensor anchor connection point and angular measurement sensor and distance measuring sensor anchor connection point, can calculate distance measuring sensor and angle vertically and horizontally, and then calculate the level in crack to, vertical double-deformation amount;(2) observation is convenient, can carry out Single Point Surveying according to actual demands of engineering by frequency readings instrument, also can carry out Continuous Observation by data collecting card, meets the needs of dissimilar engineering cracks monitoring;(3) structural grouping is simple, not only can carry out field combinations, and can according to the range of crack location, A/F adjustment distance measuring sensor and angular measurement sensor and precision。
Accompanying drawing explanation
Fig. 1 is a kind of device monitoring slope crack deformation。
Fig. 2 is a kind of three-dimensional crack displacement monitoring device。
Fig. 3 is the structural representation of the present invention。
Fig. 4 is present configuration rod member connection diagram。
In figure: 1, Vertical Pile, 2, with fixing connection ring, 3, convergence gauge, 4, displacement transducer, 5, Upper vertical fixes bar, 6, vertical air level, 7, horizontal cross bar, 8, horizontal levelling bubble, 9, oblique fixing bar, 10, angular measurement sensor, 11, angular measurement sensor extension, 12, distance measuring sensor, 13, distance measuring sensor extension, 14, lower vertical fixes bar, 15, monitoring crack, 16, the fixing bar of Upper vertical and horizontal cross bar connecting bolt, 17, oblique fixing bar and distance measuring sensor connection rotating shaft, 18, oblique fixing bar and angular measurement sensor anchor connection point, 19, angular measurement sensor and distance measuring sensor anchor connection point。
Detailed description of the invention
Illustrate embodiments of the invention are described in further detail below in conjunction with accompanying drawing, but the present embodiment is not limited to the present invention, the analog structure of every employing present invention and similar change thereof, all should list protection scope of the present invention in。
Vertically the fixing requirement of bar burial and construction technology, air level installation Technology requirement etc., be not repeated in present embodiment, and emphasis sets forth the embodiment that the present invention relates to structure。
With reference to shown in Fig. 3, Fig. 4, crack openings double-deformation monitoring of structures it include the fixing bar 5 of Upper vertical, vertical air level 6, horizontal cross bar 7, horizontal levelling bubble 8, oblique fixing bar 9, angular measurement sensor 10, distance measuring sensor 12 and the fixing bar 14 of lower vertical;It is characterized in that: the fixing bar 5 of Upper vertical and lower vertical are fixed and be respectively provided with vertical air level 6 on bar 14, and fixing for Upper vertical bar 5 and the fixing bar 14 of lower vertical are embedded in respectively the both sides in monitoring crack 15;Horizontal cross bar 7 arranges horizontal levelling bubble 8, is connected by screw rod with the fixing bar 5 of Upper vertical;Oblique fixing bar 9 is fixing with horizontal cross bar 7 to be connected;The two ends of distance measuring sensor 12 are connected with the fixing bar 14 of oblique fixing bar 9 and lower vertical respectively;The two ends of angular measurement sensor 10 are connected with oblique fixing 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。
Described Upper vertical fixes bar (5) and the fixing bar (14) of lower vertical forms by two parts, and wherein top is a rectangular slab, rectangular slab width 30mm, high 60mm, thick 15mm;Reserved 2 anchor holes being 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;Arrange the vertical bar of rectangle in the bottom of rectangular slab, the bar length of side is 30mm;The bottom of vertical bar arranges cone point, high 40mm;Rectangular slab and vertical bar adopt steel rolling to form, and strength classes of structural steel is HPB235。
Described vertical air level 6 adopts everything spirit level, and it is of a size of 60 × 10mm, and precision is 15 points/2mm, it is ensured that vertically air level 6 is vertical with vertically fixing bar during installation。
Between described horizontal cross bar 7 and oblique fixing 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 width is 30mm, and front end is a rectangular slab, rectangular slab width 30mm, long 60mm, thick 15mm, and is connected by anchor hole bolt 16 is fixing with the rectangular slab of the fixing bar 5 of Upper vertical;The oblique long 200mm of fixing bar 9, section width is 30mm, arranges the rotating shaft 17 being connected with distance measuring sensor 12 on oblique fixing bar 9;Oblique fixing bar is cylindrical with distance measuring sensor connection rotating shaft 17, and one end and oblique fixing bar are welded to connect, and the other end arranges circular port。
Described horizontal levelling bubble 8 adopts high accuracy spirit level, copper material surface degree, 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 are 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 fixing with upper reserved anchor connection point (19) of oblique fixing bar (9) and distance measuring sensor (12) respectively to be connected, and anchor connection point (19) distance of rotating shaft (17) on oblique fixing bar is 60mm。
Described distance measuring sensor (12) one end is connected by rotating shaft (17) with oblique fixing bar (9), the other end is fixing with the reserved connecting hole of the fixing bar (14) of lower vertical to be connected, and arranges, at the upper distance end points 50mm place of distance measuring sensor (12), anchor connection point (19) being connected with angular measurement sensor (10)。
Described Upper vertical fixes the fixing bar (14) of bar (5) and lower vertical, and to bury spacing underground be 220mm。
The fixing bar of described Upper vertical all adopts screw specification to be " 4-0.7x70PM ± tooth length 35 with horizontal cross bar connecting bolt 15, oblique fixing bar with angular measurement sensor anchor connection point 17, angular measurement sensor and distance measuring sensor anchor connection point 18。
The measuring method of described a kind of crack openings double-deformation monitoring of structures, mainly includes following monitoring step:
1) prepare before measuring: observe crack surrounding, process measure field, determine that Upper vertical fixes bar (5) and the concrete burial place of the fixing bar (14) of lower vertical, guarantee that Upper vertical fixes bar (5) and lower vertical fixing bar (14), horizontal cross bar (7) in approximately the same plane simultaneously, and vertical with fracture strike。
2) vertically fixing bar is buried underground: be drilled with the anchor hole of appropriate depth at select location, fixing for Upper vertical bar (5) and the fixing bar (14) of lower vertical are inserted vertically into anchor hole, the air level making every effort to vertically fix bar is placed in the middle, then irrigates Fast Setting Cement Slurry or binding agent in space。
3) horizontal cross bar (7) and the fixing bar (5) of Upper vertical are connected: after the fixing bar 5 of Upper vertical and the fixing bar 10 of lower vertical have been buried underground, horizontal cross bar (7) is connected together with the fixing bar (5) of oblique fixing bar (9) and Upper vertical is fixing, it is ensured that horizontal levelling bubble (8) is placed in the middle, even if horizontal cross bar (7) level。
4) sensor is connected: be connected respectively at distance measuring sensor (12) two ends on the rotating shaft (17) of oblique fixing bar and the reserved connecting hole of the fixing bar (14) of lower vertical, then the two ends of angular measurement sensor (10) are respectively fixedly connected with junction point (18) and (19) of oblique fixing bar (9) and distance measuring sensor (12)。
5) adjust: after connecting sensor, on eye-level cross bar, whether air level moves, suitably adjust horizontal cross bar (7) and the junction point of the fixing bar (5) of Upper vertical so that it is fixing after level。
6) reading: after fixing total, reads the distance of oblique fixing bar and distance measuring sensor connection rotating shaft (17) to oblique fixing bar with angular measurement sensor anchor connection point (18) and angular measurement sensor and distance measuring sensor anchor connection point (19) respectively by slide gauge;Distance measuring sensor (12) and the initial reading of angular measurement sensor (10) is read by readout instrument。
7) data process: measure angular measurement sensor (10) and the reading of distance measuring sensor (12) respectively according to setting monitoring frequency, reader according to angular measurement sensor (10) calculates the angle of oblique fixing bar (9) and distance measuring sensor (12), and then calculates distance measuring sensor (12) and level to, vertical angle;First change reading situation according to distance measuring sensor (12), calculate crack diagonal distortion amount, further according to oblique fixing bar (9) and distance measuring sensor (12) angle this calculate and to obtain the level of monitoring crack (15), vertical deflection。

Claims (9)

1. a crack openings double-deformation monitoring of structures, it includes the fixing bar of Upper vertical, vertical air level, horizontal cross bar, horizontal levelling bubble, oblique fixing bar, angular measurement sensor, distance measuring sensor and the fixing bar of lower vertical;It is characterized in that: the fixing bar of Upper vertical and lower vertical are fixed and be respectively provided with vertical air level on bar, and fixing for Upper vertical bar and the fixing bar of lower vertical are embedded in respectively the both sides in monitoring crack;Horizontal cross bar arranges horizontal levelling bubble, is connected by screw rod with the fixing bar of Upper vertical;Oblique fixing bar is fixing with horizontal cross bar to be connected;The two ends of distance measuring sensor are connected with the fixing bar of oblique fixing bar and lower vertical respectively;The two ends of angular measurement sensor are connected with oblique fixing 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 fixing bar of described Upper vertical 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, arrange vertical bar in the bottom of rectangular slab, the bottom of vertical bar is that circular cone is pointed;Rectangular slab material identical with vertical bar employing, adopts alloy material or steel or rigid plastics, 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 fixing bar of described lower vertical forms by two parts, wherein top is a rectangular slab, the anchor hole that on rectangular slab, reserved distance measuring sensor extension connects, arrange vertical bar in the bottom of rectangular slab, the bottom of vertical bar is that circular cone is pointed;Rectangular slab is bolted or welds with vertical bar or paste and is connected, and can adopt alloy material or steel or rigid plastics。
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 fixing bar, angle is 30 ° or 45 °, both are integral prefabricated forms, its material adopts alloy material or steel or rigid plastics, and wherein horizontal cross bar is connected by anchor hole bolt is fixing with the fixing bar of Upper vertical;Oblique fixing bar arranges the rotating shaft being connected with distance measuring sensor。
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 fixing with anchor connection point reserved on oblique fixing bar and distance measuring sensor respectively to be connected, and anchor connection point can according to field condition adjustment to the distance of rotating shaft on oblique fixing bar。
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 fixing bar, the other end is fixing with the reserved connecting hole of the fixing bar of lower vertical to be connected, 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, it is characterised in that: described distance measuring sensor and angular measurement sensor can adopt vibrating string type sensor or resistance sensor, and data can adopt frequency readings instrument or data collecting card to collect。
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 according to the width in monitoring crack, and the distance between the fixing bar of Upper vertical and the fixing bar of lower vertical, the front end of the extension of sensor arranges the lengthening steel disc of certain length。
9. the measuring method of a crack openings double-deformation monitoring of structures according to claim 1, it is characterised in that method step is as follows:
1) prepare before measuring: observe crack surrounding, process measure field, determine the fixing bar of Upper vertical and the concrete burial place of the fixing bar of lower vertical, guarantee that the fixing bar of Upper vertical and lower vertical fixing bar, horizontal cross bar are in approximately the same plane simultaneously, and vertical with fracture strike;
2) burying vertically fixing bar underground: be drilled with the anchor hole of appropriate depth at select location, fixing for Upper vertical bar and the fixing bar of lower vertical are inserted vertically into anchor hole, the air level making every effort to vertically fix bar is placed in the middle, then irrigates Fast Setting Cement Slurry or binding agent in space;
3) horizontal cross bar and the fixing bar of Upper vertical are connected: after the fixing bar of Upper vertical and the fixing bar of lower vertical have been buried underground, horizontal cross bar is connected together with the fixing bar of oblique fixing bar and Upper vertical is fixing, it is ensured that horizontal cross bar air level is placed in the middle, even if horizontal cross bar level;
4) sensor is connected: be connected respectively at distance measuring sensor two ends on the rotating shaft of oblique fixing bar and the reserved connecting hole of the fixing bar of lower vertical, then the two ends of angular measurement sensor are respectively fixedly connected with the junction point of oblique fixing bar and distance measuring sensor;
5) adjust: after connecting sensor, on eye-level cross bar, whether air level moves, suitably adjust horizontal cross bar and the junction point of the fixing bar of Upper vertical so that it is fixing after level;
6) reading: after fixing total, reads the distance of oblique fixing bar and distance measuring sensor connection rotating shaft to oblique fixing bar with angular measurement sensor anchor connection point, angular measurement sensor and distance measuring sensor anchor connection point respectively by slide gauge;The initial reading of distance measuring sensor and angular measurement sensor is read by readout instrument;
7) data process: measure the reading of angular measurement sensor and distance measuring sensor respectively according to setting monitoring frequency, reader according to angular measurement sensor calculates the angle of oblique fixing bar and distance measuring sensor, and then calculates distance measuring sensor and level to, vertical angle;First changing reading situation according to distance measuring sensor, calculate crack diagonal distortion amount, the angle further according to oblique fixing bar Yu distance measuring sensor calculates to obtain the monitoring level in crack, vertical deflection。
CN201410150190.5A 2014-04-15 2014-04-15 A kind of crack openings double-deformation monitoring of structures and measuring method Expired - Fee Related CN103913145B (en)

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