CN204461365U - Structure measured by a kind of buried prismatic jointing rock mass tunnel slackness circle - Google Patents
Structure measured by a kind of buried prismatic jointing rock mass tunnel slackness circle Download PDFInfo
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- CN204461365U CN204461365U CN201520075514.3U CN201520075514U CN204461365U CN 204461365 U CN204461365 U CN 204461365U CN 201520075514 U CN201520075514 U CN 201520075514U CN 204461365 U CN204461365 U CN 204461365U
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Abstract
The utility model provides a kind of buried prismatic jointing rock mass tunnel slackness circle and measures structure, mounting hole is drilled with near tunnel face rear, described mounting hole is arranged on tunnel crown, the spandrel of tunnel both sides and the abutment wall of tunnel both sides, and in mounting hole, a Bragg optical-fiber grating sensor is all installed at every bar cylinder joint; The abutment wall of described Bragg optical-fiber grating sensor monitoring section both sides offers packer permeability test hole.Owing to adopting the technical solution of the utility model, the beneficial effects of the utility model are: (1) the utility model measures buried prismatic jointing rock mass tunnel relaxation depth by grating sensor, and measurement data is accurate; (2) the utility model is measured structure and to be assembled mutually with grating sensor by packer permeability test hole and coordinate, and tests further, makes test result more accurate.
Description
Technical field
The utility model relates to a kind of buried prismatic jointing rock mass tunnel slackness circle and measures structure, is mainly applicable to the columnar basalt country rock hole section of buried access tunnel and hydraulic tunnel.
Background technology
Prismatic jointing rock mass is the more special rock mass of a class, Irish touchstone is after volcanic eruption or earth's surface are overflowed, equally distributed Irregular hexahedron post is formed in the process that condensation is shunk, due to the existence of a large amount of cylinder, make the country rock relaxation depth measurement of rock mass hole, prismatic jointing section can be subject to the impact of irregular cylinder, therefore conventional wave speed measurement structure faces the problem of applicability deficiency, and the design of relaxation depth to rock-bolt length seems particularly important, need by suitable measurement structure measurement relaxation depth, the anchor pole of length reasonable in design.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of measurement structure utilizing grating sensor to measure buried prismatic jointing rock mass tunnel relaxation depth, for this reason, the utility model by the following technical solutions:
Structure measured by a kind of buried prismatic jointing rock mass tunnel slackness circle, mounting hole is drilled with near tunnel face rear, described mounting hole is arranged on tunnel crown, the spandrel of tunnel both sides and the abutment wall of tunnel both sides, and in mounting hole, a Bragg optical-fiber grating sensor is all installed at every bar cylinder joint; The abutment wall of described Bragg optical-fiber grating sensor monitoring section both sides offers packer permeability test hole.Bragg optical-fiber grating sensor can measure tunnel face forward in tunneling process, the change occurred, according to the degree of depth of the Bragg grating sensor distance hole wall of undergo mutation (discontinuous change occurs reading), tentatively can determine to occur to shear or the tension deformation cylinder degree of depth, tentatively determine that hole, prismatic jointing section relaxes circle scope with this.
On the basis adopting technique scheme, the utility model also can adopt following further technical scheme:
Described tunnel face rear 1-2m is drilled with mounting hole, described mounting hole hole depth 12m.
In mounting hole after described Bragg optical-fiber grating sensor distance tunnel wall 1 meter.
Two end points of described Bragg optical-fiber grating sensor are positioned at both sides, cylinder joint.
Described packer permeability test hole is opened in the section 2m position of monitoring apart from described Bragg optical-fiber grating sensor, and described packer permeability test hole is opened in the abutment wall place of described section both sides.Adopt the method for packer permeability test, to the packer permeability test that each bar cylinder within the scope of the lax circle interface both sides 1m of Bragg optical-fiber grating sensor Preliminary Determination circulates.The test result lax according to this cylinder joint, four packer permeability test holes, accurately can determine the lax circle degree of depth of prismatic jointing rock mass tunnel.
Owing to adopting the technical solution of the utility model, the beneficial effects of the utility model are: (1) the utility model measures buried prismatic jointing rock mass tunnel relaxation depth by grating sensor, and measurement data is accurate; (2) the utility model is measured structure and to be assembled mutually with grating sensor by packer permeability test hole and coordinate, and tests further, makes test result more accurate.
Accompanying drawing explanation
The mounting structure schematic diagram of structure in tunnel measured by a kind of buried prismatic jointing rock mass tunnel slackness circle that Fig. 1 provides for the utility model.
The Bragg grating of a kind of buried prismatic jointing rock mass tunnel slackness circle measurement structure that Fig. 2 provides for the utility model is installed to erect and is cutd open figure.
The packer permeability test hole schematic diagram of a kind of buried prismatic jointing rock mass tunnel slackness circle measurement structure that Fig. 3 provides for the utility model.
The schematic diagram of Bragg optical-fiber grating sensor in mounting hole of a kind of buried prismatic jointing rock mass tunnel slackness circle measurement structure that Fig. 4 provides for the utility model.
Embodiment
With reference to accompanying drawing, structure measured by a kind of buried prismatic jointing rock mass 9 tunnel, mounting hole 1 is drilled with near tunnel face 7 rear, described mounting hole 1 is arranged on tunnel crown 2, the spandrel 3 of tunnel both sides and the abutment wall 4 of tunnel both sides, and in mounting hole 1, a Bragg optical-fiber grating sensor 5 is all installed at every bar cylinder joint; The abutment wall of described Bragg optical-fiber grating sensor 5 monitoring section 8 both sides offers packer permeability test hole 6.Bragg optical-fiber grating sensor 5 can measure tunnel face 7 forward in tunneling process, the change occurred, according to undergoing mutation, namely there is discontinuous change in reading, the degree of depth of Bragg grating sensor distance hole wall, tentatively can determine to occur to shear or the tension deformation cylinder degree of depth, tentatively determine that hole, prismatic jointing section relaxes circle scope with this.
Described tunnel face rear 1-2m is drilled with mounting hole 1, described mounting hole 1 hole depth 12m.
Two end points of described Bragg optical-fiber grating sensor 5 are positioned at both sides, cylinder joint.
Described packer permeability test hole 6 is opened in the section 8 2m position of monitoring apart from described Bragg optical-fiber grating sensor 5, and described packer permeability test hole 6 is opened in the abutment wall place of described section 8 both sides.Adopt the method for packer permeability test, to the packer permeability test that each bar cylinder within the scope of the lax circle interface both sides 1m of Bragg optical-fiber grating sensor 5 Preliminary Determination circulates.The test result lax according to this cylinder joint, four packer permeability test holes 6, accurately can determine the lax circle degree of depth of prismatic jointing rock 9 body tunnel further.
Claims (5)
1. structure measured by a buried prismatic jointing rock mass tunnel slackness circle, it is characterized in that, mounting hole is drilled with near tunnel face rear, described mounting hole is arranged on tunnel crown, the spandrel of tunnel both sides and the abutment wall of tunnel both sides, and in mounting hole, a Bragg optical-fiber grating sensor is all installed at every bar cylinder joint; The abutment wall of described Bragg optical-fiber grating sensor monitoring section both sides offers packer permeability test hole.
2. structure measured by a kind of buried prismatic jointing as claimed in claim 1 rock mass tunnel slackness circle, and it is characterized in that, described tunnel face rear 1-2m is drilled with mounting hole, described mounting hole hole depth 12m.
3. structure measured by a kind of buried prismatic jointing as claimed in claim 1 rock mass tunnel slackness circle, it is characterized in that, in the mounting hole after described Bragg optical-fiber grating sensor distance tunnel wall 1 meter.
4. structure measured by a kind of buried prismatic jointing as claimed in claim 1 rock mass tunnel slackness circle, and it is characterized in that, two end points of described Bragg optical-fiber grating sensor are positioned at both sides, cylinder joint.
5. structure measured by a kind of buried prismatic jointing as claimed in claim 1 rock mass tunnel slackness circle, it is characterized in that, described packer permeability test hole is opened in the section 2m position of monitoring apart from described Bragg optical-fiber grating sensor, and described packer permeability test hole is opened in the abutment wall place of described section both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520075514.3U CN204461365U (en) | 2015-02-03 | 2015-02-03 | Structure measured by a kind of buried prismatic jointing rock mass tunnel slackness circle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520075514.3U CN204461365U (en) | 2015-02-03 | 2015-02-03 | Structure measured by a kind of buried prismatic jointing rock mass tunnel slackness circle |
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| CN204461365U true CN204461365U (en) | 2015-07-08 |
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| CN201520075514.3U Active CN204461365U (en) | 2015-02-03 | 2015-02-03 | Structure measured by a kind of buried prismatic jointing rock mass tunnel slackness circle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713492A (en) * | 2015-02-03 | 2015-06-17 | 中国电建集团华东勘测设计研究院有限公司 | Method for measuring depth of loose ring of deeply-buried columnar jointed rock tunnel |
| CN107091623A (en) * | 2017-03-20 | 2017-08-25 | 西安工业大学 | Tunnel surrounding relaxation zone THICKNESS CALCULATION method |
-
2015
- 2015-02-03 CN CN201520075514.3U patent/CN204461365U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713492A (en) * | 2015-02-03 | 2015-06-17 | 中国电建集团华东勘测设计研究院有限公司 | Method for measuring depth of loose ring of deeply-buried columnar jointed rock tunnel |
| CN107091623A (en) * | 2017-03-20 | 2017-08-25 | 西安工业大学 | Tunnel surrounding relaxation zone THICKNESS CALCULATION method |
| CN107091623B (en) * | 2017-03-20 | 2019-05-14 | 西安工业大学 | Tunnel surrounding relaxation zone THICKNESS CALCULATION method |
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