CN105627895A - Tunnel convergence monitoring method - Google Patents
Tunnel convergence monitoring method Download PDFInfo
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- CN105627895A CN105627895A CN201410620731.6A CN201410620731A CN105627895A CN 105627895 A CN105627895 A CN 105627895A CN 201410620731 A CN201410620731 A CN 201410620731A CN 105627895 A CN105627895 A CN 105627895A
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Abstract
The invention relates to a subway tunnel shield construction technology, specifically to a tunnel convergence monitoring method. In the tunnel convergence monitoring method, two convergence measuring points A, B, C and D are buried at two sides of a waist upper part and a waist lower part of a tunnel ring, and during a convergence test, a convergence gauge is utilized to measure distance of six sides AB, AC, BD, BC, BD and CD. An auxiliary device of each measuring point consists of a hook component and a buried rod component, and before the test, first environment temperature needs to be read, so that temperature correction can be carried out. When distance between any two points is tested, more than three times of continuous measurement and reading are needed, and the average value is taken as reading of this time. A difference value of a convergence value after temperature correction is performed on the reading of this time and a convergence value of last time is convergence variation of this time. The tunnel convergence monitoring method can rapidly and conveniently measure the upper and lower points, arrangement of the measuring points is simple, the cost is low, a tunnel sectional area occupied by a device is small, and monitoring of relatively high precision can be realized.
Description
Technical field
The present invention relates to subway tunnel shield construction technology, be specifically related to a kind of tunnel convergence monitoring method.
Background technology
After complete or first of tunnel excavation, due to the excavation in tunnel, making orogen stress change, tunnel perimeter can restrain (some places diminish, and some places become big) but the value of this change can not exceed certain value, otherwise will cave in. For guaranteeing the safe operation in tunnel, to bury a little in time after having excavated, and be particularly important by special convergence instrument measurement convergent deformation amount.
Existing monitoring method majority is complex, and cost is high, and shared by test equipment, tunnel sectional area is big.
Summary of the invention
It is an object of the invention to provide a kind of tunnel convergence monitoring method, solve existing monitoring method measuring point and lay the problem complicated, cost is high, and be capable of high-precision monitoring.
The technical scheme is that
A kind of tunnel convergence monitoring method, convergence gauge is adopted to carry out the measurement of convergent deformation amount, respectively bury two convergences measuring point, respectively A, B, C, D on Huan Yao top, tunnel and both sides, waist bottom underground, during convergence test, measure the distance on six limits of AB, AC, BD, BC, BD, CD with convergence gauge; The auxiliary device of measuring point is by hanging hook assembly and buries bar assembly underground and forms; Before test, need to first read ambient temperature, in order to carry out temperature adjustmemt; During measurement, first convergence gauge dial gauge reading is adjusted to 23-30mm; Secondly convergence gauge steel ruler hook is hung on the auxiliary device of to be measured two measuring point, tightens up steel ruler, and be fixed; Then rotate adjusting nut, make the travelling lines that steel ruler is tightened to observation window overlap with the lines on panel; Reading the numerical value on steel ruler and dial gauge afterwards, both additions are the distance measured between two measuring points; Carrying out temperature adjustmemt subsequently, temperature adjustmemt formula is as follows:
��LC=K �� �� T �� L
Wherein, �� Lc is temperature corrected value, and K is correction factor, and �� T is the difference measuring temperature with initial temperature, and L is the distance between two measuring points of two measuring points; When testing the distance between any two points, surveying continuously and read more than 3 times, this reading of acquisition of averaging, the difference of this convergency value after this reading is carried out temperature adjustmemt and convergency value last time is this convergence variable quantity.
Preferably, when tunnel internal and external temperature gap is bigger, after entering tunnel, it is ensured that described convergence gauge stablizes more than 15 minutes.
Preferably, in the auxiliary device of described measuring point, described in bury bar assembly underground be expansion bolt, when measuring point is buried underground, first impact to bore at point position and make a call to a hole being a bit larger tham expansion bolt diameter, then have the expansion bolt of screw to tighten top processing, then hook one end is screwed into expansion bolt. Place as more serious in catalase, bores or collects together son and make a call to a relatively deep bigger hole, then imbedded by expansion bolt with quick-setting cement mortar with impact, and treating that mortar solidifies can use.
Preferably, in the auxiliary device of described measuring point, described bar assembly of burying underground is damascene structures, and described in bury bar assembly underground and include the body of rod, screw callipers dislocation preventing slot, dustproof protective cover, the described conical structure of body of rod head, described screw callipers dislocation preventing slot is arranged on described body of rod afterbody, and the end face of described screw callipers dislocation preventing slot is provided with the annular groove of a placement dustproof protective cover; Described hanging hook assembly one end is Hook, and the other end is thread head, and described thread head and screw callipers dislocation preventing slot are connected.
It is an advantage of the current invention that: can upper and lower measuring point quickly and easily, measuring point lay simple, with low cost, test hold facility tunnel sectional area is little, can realize the monitoring of higher precision.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and instantiation, the present invention is described in detail, but the invention is not limited in following instance.
Fig. 1 illustrates the flow chart of the tunnel convergence monitoring method of the present invention.
Fig. 2 illustrates the convergence monitoring point generalized section of the present invention.
Fig. 3 illustrates the structural representation of measuring point auxiliary device, wherein connecting rod 1 in specific embodiments of the invention 2; Hook 2; Thread head 3; The body of rod 4; Cone drill bit 5; Screw callipers dislocation preventing slot 6; Dustproof protective cover 7.
Detailed description of the invention
Embodiment 1:
A kind of tunnel convergence monitoring method as shown in Figure 1, convergence gauge is adopted to carry out the measurement of convergent deformation amount, two convergence measurement hooks are respectively buried underground on Huan Yao top, tunnel and both sides, waist bottom, when measuring point is buried underground, first impact to bore at point position and make a call to a hole being a bit larger tham expansion bolt diameter, then there is the expansion bolt of screw to tighten top processing, then the hook one end made of rustless steel is screwed into expansion bolt. Place as more serious in catalase can use to impact brill or collect together son makes a call to a relatively deep bigger hole, is then imbedded by expansion bolt with quick-setting cement mortar, treats that mortar solidification can use. Before convergence monitoring, need to first read ambient temperature, in order to carry out temperature adjustmemt. Temperature adjustmemt formula is as follows:
��LC=K �� �� T �� L
Wherein: �� Lc temperature corrected value (mm); K correction factor (this instrument is 12*10-6mm/ DEG C); The difference (DEG C) of this temperature of �� T and initial temperature; This reading distance (mm) of L two measuring point.
Convergence monitoring point section is illustrated as in figure 2 it is shown, A, B, C, D are monitoring point, measures the distance on six limits of AB, AC, BD, BC, BD, CD during convergence test with convergence gauge.
The convergence gauge adopted generally comprises the parts such as spring, dial gauge, adjusting nut, steel ruler, hook, and adopts luminous paint indicatrix, adapts to normal operation under engineering site environment. Specification and the important technological parameters of this convergence gauge are as follows:
Range: 20mm, 30mm;
Least count: 0.01mm;
Systematic error: 0.5mm;
Weight: 1.75kg;
Temperature adjustmemt system: 12 �� 10-6Mm/ shelves
Concrete measuring process is as follows:
Convergence gauge dial gauge reading is adjusted to 23-30mm; Convergence gauge steel ruler hook is hung on to be measured two measuring point, tightens up steel ruler, pin is inserted steel ruler closes in suitable aperture, and be fixed with hanging hook assembly; Rotate adjusting nut, make the travelling lines that steel ruler is tightened to observation window overlap with the lines on panel; Reading the numerical value on steel ruler and dial gauge, both additions are the distance measured between two measuring points; After measuring, first unclamping adjusting nut every time, be then log out hook, taken off by steel ruler, twist is regained, and cleans collection.
When inside and outside tunnel, room temperature is bigger, before measuring, convergence gauge should first be observed on-the-spot placement of testing tunnel for more than 15 minutes again.
When measuring the distance of point-to-point transmission, first by two hooks hanging over tested point. Adjusting adjusting nut uses travelling line to overlap with indicatrix, just can read dial gauge numerical value, adds ruler measured value, can draw the distance of point-to-point transmission.
It is both needed to when testing the distance between any two points survey continuously and reads more than 3 times, average as this reading. This convergency value after this reading is carried out temperature adjustmemt with last time convergency value difference be this convergence variable quantity, such as formula calculated below.
�� Lm=�� L-�� Lc
Wherein �� Lc symbol "+" represent elongation, symbol "-" then represents shortening.
Embodiment 2
Except the above-mentioned measurement hook being made up of expansion bolt and hook, also can adopt the steel ruler of the fixing convergence gauge of measuring point auxiliary device as shown in Figure 3. This measuring point auxiliary device includes connecting rod 1; Hook 2; Thread head 3; The body of rod 4; Cone drill bit 5; Screw callipers dislocation preventing slot 6; Dustproof protective cover 7, and in damascene structures. Screw callipers dislocation preventing slot 6 is arranged on the afterbody of the described body of rod 4. The end face of screw callipers dislocation preventing slot 6 is provided with the annular groove of a placement dustproof protective cover 7. Thread head 3 is threadeded with screw callipers dislocation preventing slot 6.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (5)
1. a tunnel convergence monitoring method, convergence gauge is adopted to carry out the measurement of convergent deformation amount, it is characterized in that: respectively bury two convergence measuring points underground on Huan Yao top, tunnel and both sides, waist bottom, respectively A, B, C, D, measures the distance on six limits of AB, AC, BD, BC, BD, CD with convergence gauge during convergence test; The auxiliary device of measuring point is by hanging hook assembly and buries bar assembly underground and forms; Before monitoring, need to first read ambient temperature, in order to carry out temperature adjustmemt; During monitoring, first convergence gauge dial gauge reading is adjusted to 23-30mm; Secondly convergence gauge steel ruler hook is hung on the auxiliary device of to be measured two measuring point, tightens up steel ruler, and be fixed; Then rotate adjusting nut, make the travelling lines that steel ruler is tightened to observation window overlap with the lines on panel; Reading the numerical value on steel ruler and dial gauge afterwards, both additions are the distance measured between two measuring points; Carrying out temperature adjustmemt subsequently, temperature adjustmemt formula is: �� LC=K �� �� T �� L, wherein �� Lc is temperature corrected value, and K is correction factor, and �� T is the difference measuring temperature with initial temperature, and L is the distance between two measuring points of two measuring points; When testing the distance between any two points, surveying continuously and read more than 3 times, this reading of acquisition of averaging, this convergency value after this reading is carried out temperature adjustmemt and convergency value last time subtract each other and namely obtain this convergence variable quantity.
2. tunnel convergence monitoring method according to claim 1, it is characterised in that: when tunnel internal and external temperature difference is bigger, after entering tunnel, it is ensured that described convergence gauge stablizes more than 15 minutes.
3. tunnel convergence monitoring method according to claim 1, it is characterized in that: in the auxiliary device of described measuring point, described bar assembly of burying underground is expansion bolt, when measuring point is buried underground, first impact to bore at point position and make a call to a hole being a bit larger tham expansion bolt diameter, then there is the expansion bolt of screw to tighten top processing, then hook one end is screwed into described expansion bolt.
4. tunnel convergence monitoring method according to claim 3, it is characterised in that: place as more serious in catalase, with impact bore or collect together son make a call to one more deeply, bigger hole, then with quick-setting cement mortar by expansion bolt embedment.
5. tunnel convergence monitoring method according to claim 1, it is characterized in that: in the auxiliary device of described measuring point, described bar assembly of burying underground is damascene structures, and described in bury bar assembly underground and include the body of rod, screw callipers dislocation preventing slot, dustproof protective cover, the described conical structure of body of rod head, described screw callipers dislocation preventing slot is arranged on described body of rod afterbody, and the end face of described screw callipers dislocation preventing slot is provided with the annular groove of a placement dustproof protective cover; Described hanging hook assembly one end is Hook, and the other end is thread head, and described thread head is threadeded with screw callipers dislocation preventing slot.
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| CN201410620731.6A CN105627895A (en) | 2014-11-06 | 2014-11-06 | Tunnel convergence monitoring method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437731A (en) * | 2016-10-09 | 2017-02-22 | 中国电建集团成都勘测设计研究院有限公司 | Pre-warning dual-shield TBM |
| CN106643632A (en) * | 2016-12-28 | 2017-05-10 | 山东大学 | Digital display type tunnel convergence gauge for automatically recording and processing data and using method of tunnel convergence gauge |
| CN107726953A (en) * | 2017-11-16 | 2018-02-23 | 中国地质大学（武汉） | Tunnel convergence measurement method and device on a kind of indirect type tunnel |
| CN112762875A (en) * | 2021-01-27 | 2021-05-07 | 中铁十二局集团有限公司 | New Olympic tunnel convergence displacement measuring method |
| CN114268855A (en) * | 2021-12-01 | 2022-04-01 | 广东建采网科技有限公司 | Data acquisition method and system of convergence instrument based on LoRa wireless transmission technology |
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| CN87203956U (en) * | 1987-03-24 | 1988-06-29 | 铁道部第三勘测设计院科学技术研究所 | Displacement gauge for tunnel vault |
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| CN101982723A (en) * | 2010-11-09 | 2011-03-02 | 杨浩 | Method for monitoring deformation of convergence meter by equivalent method |
| CN102493989A (en) * | 2011-12-30 | 2012-06-13 | 山东大学 | Auxiliary device for monitoring and measuring convergence points in tunnel construction by cross diaphragm (CRD) method and method for burying auxiliary device |
| CN102494007A (en) * | 2011-12-30 | 2012-06-13 | 山东大学 | Auxiliary device for anti-destructive monitoring and measurement of convergence points in tunnel engineering and method for burying auxiliary device |
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2014
- 2014-11-06 CN CN201410620731.6A patent/CN105627895A/en active Pending
Patent Citations (6)
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| CN87203956U (en) * | 1987-03-24 | 1988-06-29 | 铁道部第三勘测设计院科学技术研究所 | Displacement gauge for tunnel vault |
| CN2186909Y (en) * | 1993-09-14 | 1995-01-04 | 铁道部隧道工程局科学研究所 | Digital indicating gallery collecting gauge |
| JPH08334323A (en) * | 1995-06-06 | 1996-12-17 | Hitachi Cable Ltd | Conduit route-measuring apparatus |
| CN101982723A (en) * | 2010-11-09 | 2011-03-02 | 杨浩 | Method for monitoring deformation of convergence meter by equivalent method |
| CN102493989A (en) * | 2011-12-30 | 2012-06-13 | 山东大学 | Auxiliary device for monitoring and measuring convergence points in tunnel construction by cross diaphragm (CRD) method and method for burying auxiliary device |
| CN102494007A (en) * | 2011-12-30 | 2012-06-13 | 山东大学 | Auxiliary device for anti-destructive monitoring and measurement of convergence points in tunnel engineering and method for burying auxiliary device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437731A (en) * | 2016-10-09 | 2017-02-22 | 中国电建集团成都勘测设计研究院有限公司 | Pre-warning dual-shield TBM |
| CN106643632A (en) * | 2016-12-28 | 2017-05-10 | 山东大学 | Digital display type tunnel convergence gauge for automatically recording and processing data and using method of tunnel convergence gauge |
| CN107726953A (en) * | 2017-11-16 | 2018-02-23 | 中国地质大学（武汉） | Tunnel convergence measurement method and device on a kind of indirect type tunnel |
| CN112762875A (en) * | 2021-01-27 | 2021-05-07 | 中铁十二局集团有限公司 | New Olympic tunnel convergence displacement measuring method |
| CN114268855A (en) * | 2021-12-01 | 2022-04-01 | 广东建采网科技有限公司 | Data acquisition method and system of convergence instrument based on LoRa wireless transmission technology |
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