CN103290827B - Mounting, burying and grouting method for multi-point displacement meter - Google Patents
Mounting, burying and grouting method for multi-point displacement meter Download PDFInfo
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- CN103290827B CN103290827B CN201310237358.1A CN201310237358A CN103290827B CN 103290827 B CN103290827 B CN 103290827B CN 201310237358 A CN201310237358 A CN 201310237358A CN 103290827 B CN103290827 B CN 103290827B
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- displacement meter
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Abstract
The invention discloses a mounting, burying and grouting method for a multi-point displacement meter. According to the mounting, burying and grouting method, holes are drilled in rock stratums of different conditions, and the displacement meter is mounted at multiple points. The mounting, burying and grouting method comprises the steps of rock stratum displacement monitoring in the horizontal direction, in the vertical direction, in the slanted upward direction and in the slanted downward direction. A double grouting method is adopted in the displacement meter, namely, the displacement meter is provided with a vent pipe, a far-end anchor head, a near-end anchor head and double grouting pipes. The mounting, burying and grouting method for the multi-point displacement meter can be applied to displacement safety monitoring in building projects and construction such as water conservancy and hydropower projects, highways and railways, the problem that the grouting of the multi-point displacement meter is insufficient under different rock stratum conditions is solved, the rock mass deformation of the measured part can be reflected truly by the displacement meter, and reliable monitoring data are supplied to the buildings.
Description
technical field
The invention belongs to Geotechnical Monitoring technical field, be specifically related to the multiple position extensometer Embedded installation grouting method applied in water conservancy and hydropower and the civil engineering construction such as highway, railway.
Background technology
Multiple position extensometer is that one applies to water conservancy and hydropower and the civil works such as highway, railway construction, side slope and underground chamber rock stratum are carried out to the instrument of displacement monitoring, as transmission lever Embedment and installation and slip casting process, traditional grouting process adopts single Grouting Pipe, aperture or hole-bottom slurry-injection, small-bore stack.Find in actual applications, the numerical value majority measured by far-end measuring point does not conform to actual displacement amount.According to practical application for many years and data analysis, its reason is that the slip casting of far-end measuring point is not full, particularly crown hole and the larger installing hole of the angle that is inclined upwardly is more difficult fills, the anchoring of measuring point anchor head is unreliable, thus cause monitored data abnormal, cause erroneous judgement, affect construction safety.
Summary of the invention
The object of the invention is effectively to solve the problem that multiple position extensometer slip casting is not full under different rock-layers condition, a kind of multiple position extensometer Embedded installation grouting method is provided, make the rock mass deformation at the tested position of instrument energy actual response, for building provides reliable monitored data.
Technical scheme of the present invention is: arrange installation displacement meter for different rock-layers condition boring multiple spot, comprise horizontal direction, vertical direction, be inclined upwardly, downward-slopingly carry out strata displacement monitoring, displacement meter adopts two grouting mode, namely displacement meter configures a stack, far-end anchor head and near-end anchor head, two Grouting Pipe; For upright opening and the hole that is inclined upwardly, in displacement meter, first Grouting Pipe is arranged on one meter of in aperture, and second Grouting Pipe is arranged on far-end anchor head place, and stack exceeds the first rice of distal anchor, and beats several side opening in the 20cm of stack top; For lateral aperture and the inclined hole that dips down, in displacement meter, first Grouting Pipe is arranged on and exceeds first rice of distal anchor, and second Grouting Pipe is arranged on near-end anchor head place, and stack is arranged on the front end of port closing.
Multiple position extensometer Embedded installation grouting method of the present invention adopts the mode of two Grouting Pipe and heavy caliber stack.According to the difference at multiple position extensometer installing hole inclination angle, the installation site of adjustable Grouting Pipe and stack.By the application of multiple position extensometer slip casting new technology, effectively solve under various harsh environments and Various Complex geological conditions, the problem that multiple position extensometer slip casting is not full.The present invention applies to the displacement safety monitoring in water conservancy and hydropower and the civil engineering construction such as highway, railway, improves the accuracy of monitored data, predicts the displacement trend of rock stratum in advance, to make the corresponding precautionary measures.Building is avoided to collapse the generation of field boundary accident.
Accompanying drawing explanation
Fig. 1 is that Traditional Method installs displacement meter schematic diagram.
Fig. 2 is the displacement meter scheme of installation in upright opening of the present invention and the hole that is inclined upwardly.
Fig. 3 is the displacement meter scheme of installation of lateral aperture of the present invention and the inclined hole that dips down.
Fig. 4 is tunnel boring schematic diagram.
In figure, 1-far-end anchor head, 2-near-end anchor head, 3-displacement meter sensor, 4-Grouting Pipe, 5-stack, 6-first Grouting Pipe, 7-second Grouting Pipe, 8-first Grouting Pipe, 9-stack, 10-second Grouting Pipe, A-crown hole (upright opening), B-tunnel, C-lateral aperture, D-dips down inclined hole, and E-is inclined upwardly hole.
Detailed description of the invention
As shown in Figure 4, installation displacement meter is arranged to tunnel rockhole multiple spot, comprises horizontal direction, vertical direction, be inclined upwardly, downward-slopingly carry out strata displacement monitoring, displacement meter adopts two grouting mode, and namely displacement meter configures a stack, far-end anchor head and near-end anchor head, two Grouting Pipe.For upright opening and the hole that is inclined upwardly, in displacement meter, first Grouting Pipe is arranged on one meter of in aperture, and second Grouting Pipe is arranged on far-end anchor head place, and stack exceeds the first rice of distal anchor, and beats several side opening in the 20cm of stack top, as shown in Figure 2; For lateral aperture and the inclined hole that dips down, in displacement meter, first Grouting Pipe is arranged on and exceeds first rice of distal anchor, and second Grouting Pipe is arranged on near-end anchor head place, and stack is arranged on the front end of port closing, as shown in Figure 3.Described Grouting Pipe and stack all adopt 6 to be in charge of, and ensure that exhaust fully, guarantees into slurry smooth.
During Specific construction, adopt the pvc pipe that soft durometer is applicable to, intercept suitable length, by relevant position, together with displacement meter colligation, in synchronous feeding installing hole.Three pipes outside aperture carry out mark respectively, add cement paste fill-up hole mouth gap by geotextiles, then use cement mortar shutoff aperture.Slip casting is got final product after aperture sand solidifies.For the rock stratum that the rock cracks such as gneiss are comparatively large and underground water is larger, first Grouting Pipe can be used, carry out first phase slip casting with larger water/binder ratio (can use 1:5, ash refers to cement) slurries and form grouting plug.
To try one's best during slip casting use first Grouting Pipe, when noting to second Grouting Pipe overfall, can first shutoff second Grouting Pipe, then continuing use first Grouting Pipe slip casting to stack overfall, is water/binder ratio 1:5 when first Grouting Pipe slip casting.If in slip casting process, grouting pressure constantly increases, and stack not overfall time, re-use second Grouting Pipe note to stack overfall.When second Grouting Pipe slip casting, slip casting water/binder ratio is not less than 1:2.
For preventing underground water dilution slurries in hole, when stack overfall, must take a sample to check from exhaust pipe mouth, after the slurry water gray scale of discharge is identical with the slurry water gray scale of mixing, could shutoff stack.
Because crack, underground, various rock stratum differs greatly, for avoiding causing installing hole slip casting not full because of crack, underground spillage, when also continuing slip casting after stack shutoff, until grouting pressure reaches more than 1Mpa, and under packing state shutoff Grouting Pipe.
Because displacement meter transmission lever temperature influence can produce expand with heat and contract with cold, after slip casting terminates, after slurry water heat-transmission is stable, measure initial value again, when initial value measures, need to survey continuously to read three times, average as initial value.
Claims (3)
1. a multiple position extensometer Embedded installation grouting method, for different rock-layers condition boring multiple spot, installation displacement meter is set, comprise horizontal direction, vertical direction, be inclined upwardly, downward-slopingly carry out strata displacement monitoring, it is characterized in that: displacement meter adopts two grouting mode, namely displacement meter configures a stack, far-end anchor head and near-end anchor head, two Grouting Pipe; For upright opening and the hole that is inclined upwardly, in displacement meter, first Grouting Pipe is arranged on one meter of in aperture, and second Grouting Pipe is arranged on far-end anchor head place, and stack exceeds the first rice of distal anchor, and beats several side opening in the 20cm of stack top; For lateral aperture and the inclined hole that dips down, in displacement meter, first Grouting Pipe is arranged on and exceeds first rice of distal anchor, and second Grouting Pipe is arranged on near-end anchor head place, and stack is arranged on the front end of port closing; Described two grouting modes first use first Grouting Pipe when slip casting, when note is to second Grouting Pipe overfall, first shutoff second Grouting Pipe, then use first Grouting Pipe slip casting is continued to stack overfall, if in slip casting process, grouting pressure constantly increases, and stack not overfall time, re-use second Grouting Pipe note to stack overfall, when stack overfall, must take a sample to check from exhaust pipe mouth, after the slurry water gray scale of discharge is identical with the slurry water gray scale of mixing, ability shutoff stack; When also continuing slip casting after stack shutoff, until grouting pressure reaches more than 1Mpa, slip casting terminates, and under packing state shutoff Grouting Pipe, after slurry water heat-transmission is stable, measure initial value again, when initial value measures, need to survey continuously to read three times, average as initial value.
2. multiple position extensometer Embedded installation grouting method according to claim 1, is characterized in that when first Grouting Pipe slip casting being water/binder ratio 1:5, and when second Grouting Pipe slip casting, water/binder ratio is 1:2.
3. multiple position extensometer Embedded installation grouting method according to claim 1, is characterized in that described described Grouting Pipe and stack all adopt 6 to be in charge of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310237358.1A CN103290827B (en) | 2013-06-17 | 2013-06-17 | Mounting, burying and grouting method for multi-point displacement meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310237358.1A CN103290827B (en) | 2013-06-17 | 2013-06-17 | Mounting, burying and grouting method for multi-point displacement meter |
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| CN103290827A CN103290827A (en) | 2013-09-11 |
| CN103290827B true CN103290827B (en) | 2015-01-07 |
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Families Citing this family (5)
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| CN106289556A (en) * | 2016-09-14 | 2017-01-04 | 中国神华能源股份有限公司 | The test device of tunnel surrounding internal temperature and method of testing |
| CN107389008A (en) * | 2017-09-25 | 2017-11-24 | 辽宁工程技术大学 | A kind of device and method of field monitoring overburden of the goaf space displacement |
| CN107882568A (en) * | 2017-11-29 | 2018-04-06 | 山东大学 | Single-point displacement meter grouting device and method suitable for tunnel engineering |
| CN111141253B (en) * | 2019-12-06 | 2020-10-16 | 深圳大学 | System and method for monitoring deep settlement of soil behind shield tunnel wall |
| CN111927553B (en) * | 2020-08-06 | 2022-04-29 | 中铁隧道局集团有限公司 | Bidirectional claw anchoring device of multipoint displacement meter and radial displacement measurement method of TBM tunnel surrounding rock |
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| CN101798812A (en) * | 2010-04-19 | 2010-08-11 | 北京科技大学 | Double anchoring section prestressed anchoring system with three-layer protection and anchoring method thereof |
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2013
- 2013-06-17 CN CN201310237358.1A patent/CN103290827B/en active Active
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