CN208379557U - Crouch excavation supporting structure under a kind of shear-zone big cross section cavern - Google Patents
Crouch excavation supporting structure under a kind of shear-zone big cross section cavern Download PDFInfo
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- CN208379557U CN208379557U CN201821007984.6U CN201821007984U CN208379557U CN 208379557 U CN208379557 U CN 208379557U CN 201821007984 U CN201821007984 U CN 201821007984U CN 208379557 U CN208379557 U CN 208379557U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The utility model discloses the excavation supporting structures that crouches under a kind of shear-zone big cross section cavern, including arch, left and right abutment wall section and supporting construction, arch springing to pass through changeover portion respectively and be connected as one with left and right abutment wall section；Left and right abutment wall Duan Jun includes that the first segment being arranged from top to down, second segment, third section and the 4th section and leftwall section and RightWall section correspond, supporting construction includes the prestress anchorage cable of the row being separately connected with changeover portion upper end and first segment upper end or more, further includes the prestress anchorage cable or prestressed anchor of the row being separately connected with second segment upper end and third section upper end or more；Supporting construction further includes the advance anchor bolt of the row being separately connected with changeover portion lower end, first segment lower end, second segment lower end and third section lower end or more.The comprehensive treatment mode that the utility model uses and carry out deep support reinforcement based on prestress anchorage cable, carries out supplemented by self-advancing type prestressed anchor superficial part support reinforcement carries out supporting, ensure that construction reliability, construction quality and construction safety.
Description
Technical field
The utility model belongs to hydraulic engineering tunnel construction field, and in particular to crouches and opens under a kind of shear-zone big cross section cavern
Dig supporting construction.
Background technique
At present in hydraulic engineering tunnel construction field, big cross section cavern excavation process is usually excavated, cavern from top to bottom
Each layer of excavation is all that a face continuously promotes in the horizontal direction, this space characteristic excavated determines large ratio of height to width
Surrounding rock of chamber displacement model there are bigger differences with common Method of Tunnel Displacement mode.
During big cross section cavern excavation, fault belt can be encountered, country rock instability problem is prominent, excavates and supporting is difficult
Spend larger, existing technological means is it is difficult to ensure that safety during big cross section cavern excavation, sleeping work progress under being especially layered
In, supporting how is carried out in advance, guarantees construction safety, without more effective measures.
Utility model content
In order to solve the above problems existing in the present technology, the utility model aim is to provide a kind of shear-zone big cross section
Crouch excavation supporting structure under cavern.
The technology employed by the present utility model is
Crouch excavation supporting structure under a kind of shear-zone big cross section cavern, including arch, left and right abutment wall section and supporting construction,
Arch springing passes through changeover portion respectively and is connected as one with left and right abutment wall section；
The left and right abutment wall Duan Jun includes the first segment being arranged from top to down, second segment, third section and the 4th section and the left side
Wall section and RightWall section correspond, and the first segment, second segment, third section and the 4th section of height are no more than 5m；
The supporting construction includes and changeover portion upper end and a row that is that first segment upper end is separately connected and stretching to subjacent bed
Above prestress anchorage cable, supporting construction are separately connected with second segment upper end and third section upper end and stretch to subjacent bed
A row more than prestress anchorage cable or prestressed anchor；
The supporting construction further includes distinguishing with changeover portion lower end, first segment lower end, second segment lower end and third section lower end
An advance anchor bolt more than row that is connecting and stretching to subjacent bed.
It uses and carries out deep support reinforcement based on prestress anchorage cable, carries out superficial part reinforcing supplemented by self-advancing type prestressed anchor
The comprehensive treatment mode of supporting carries out supporting, ensure that construction reliability, construction quality and construction safety.
In order to fix supporting construction, the arch includes the steel arch-shelf set gradually from cavern surface along ground direction and spraying
Concrete layer；
The changeover portion and left and right abutment wall Duan Jun include the perpendicular concrete layer set gradually from cavern surface along ground direction,
Steel arch-shelf and gunning concrete layer；
Steel arch-shelf is wrapped up inside the perpendicular concrete layer, gunning concrete layer is sprayed at basement rock layer surface.
For the ease of fixed supporting construction, the perpendicular concrete layer is reserved with multiple rows of joint grouting hole, every row from top to down
In joint grouting hole longitudinal direction array pitch be 2.5m, the aperture in joint grouting hole is 50mm.
When changeover portion upper end, first segment upper end, second segment upper end and third section upper end be respectively provided be prestress anchorage cable when,
Prestress anchorage cable longitudinal direction array pitch is 4m, and the length of prestress anchorage cable is 20m-50m, prestress anchorage cable 1500KN；
When changeover portion upper end and first segment upper end are provided that prestress anchorage cable and second segment upper end and third section upper end are set
When what is set is prestressed anchor, prestress anchorage cable longitudinal direction array pitch is 4m, and the length of prestress anchorage cable is 20m-30m, prestressed anchor
Rope is 1500KN, and prestressed anchor longitudinal direction array pitch is 3m, and the length of prestressed anchor is 12m-24m, and prestressed anchor is
450KN。
The prestress anchorage cable passes through gunning concrete layer, steel arch-shelf and perpendicular concrete layer and is fixed and exposes perpendicular coagulation
Soil layer；
When second segment upper end and third section upper end are provided that prestressed anchor, the prestressed anchor of second segment upper end is worn
It crosses gunning concrete layer, steel arch-shelf and perpendicular concrete layer and is fixed and exposes perpendicular concrete layer, the prestressing force of third section upper end
Anchor pole passes through gunning concrete layer and is connected and fixed with steel arch-shelf.
Cavern is further reinforced, the supporting construction further includes the row set gradually from vault two sides lower end to arch springing
The above first dowel beam, the first dowel beam are connect with steel arch-shelf, and longitudinal array pitch of the first dowel beam is 1.5m, the first dowel beam
Length be 12m.
Further reinforce cavern, the supporting construction further include set gradually from changeover portion to the 4th section and under stretching to
Multiple rows of second dowel beam of sleeping layer, the second dowel beam are connect with steel arch-shelf, and the second dowel beam longitudinal direction array pitch in every row is
1.5m, the second dowel Shu Changdu are 12m.
Further reinforce cavern, the supporting construction further include set gradually from vault to vault two sides lower end it is multiple rows of
System anchor bolt, the system anchor bolt longitudinal direction array pitch in every row are 0.75m, and the vertical array pitch of every row is 1.5m, each short interval of platoon leader
Interlaced arrangement.
Further reinforce cavern, the supporting construction further include under changeover portion lower end, first segment lower end, second segment
An advance anchor bolt more than row that is that end, third section lower end are separately connected and stretching to subjacent bed, longitudinal array pitch of advance anchor bolt are
1.5m, the advance anchor bolt of each installation point include long advance anchor bolt and short advance anchor bolt.
One end of the advance anchor bolt extends into the joint grouting hole advanced consolidation grouting of progress and fixes.
The utility model has the following beneficial effects:
The utility model implements depth feature in view of construction effect and prestressing force, deep using carrying out based on prestress anchorage cable
Portion's support reinforcement, the comprehensive treatment mode that superficial part support reinforcement is carried out supplemented by self-advancing type prestressed anchor carry out supporting, guarantee
Construction reliability, construction quality and construction safety reduce the shakinesses such as landslide, chip off-falling during the excavation that crouches under unfavorable geology
Pledge love condition, ensure that cavern's Forming Quality, improve construction efficiency, is very suitable to large-scale promotion use.
Detailed description of the invention
Fig. 1 be the utility model-embodiment 1 A class shear-zone big cross section cavern under crouch excavation supporting structure section show
It is intended to.
Fig. 2 is the C portion enlarged drawing of Fig. 1.
Fig. 3 be the utility model-embodiment 2 B class shear-zone big cross section cavern under crouch excavation supporting structure section show
It is intended to.
Fig. 4 be the utility model-embodiment tunnel-spillway F3 shear-zone and influence band big cross section cavern under crouch excavate
The top cross-sectional view of supporting construction.
In figure: 1- arch；201- erects concrete layer；202- steel arch-shelf；203- gunning concrete layer；204- joint grouting hole；
3- changeover portion；4- prestress anchorage cable；5- the first dowel beam；6- the second dowel beam；7- system anchor bolt；8- advance anchor bolt；9- is answered in advance
Power anchor pole.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further elaborated the utility model.
Embodiment 1
As illustrated in fig. 1 and 2, crouch excavation supporting structure under a kind of shear-zone big cross section cavern of the present embodiment, including arch 1,
Left and right abutment wall section and supporting construction, arch springing pass through changeover portion 3 respectively and are connected as one with left and right abutment wall section, and arch includes from hole
The steel arch-shelf 202 and gunning concrete layer 203 that chamber surface is set gradually along ground direction.Changeover portion 3 and left and right abutment wall section are wrapped
The perpendicular concrete layer 201, steel arch-shelf 202 and gunning concrete layer 203 set gradually from cavern surface along ground direction is included,
In, it erects and wraps up steel arch-shelf 202 inside concrete layer 201, gunning concrete layer 201 is sprayed at basement rock layer surface.
Perpendicular concrete layer 201 uses C30 concrete, erects concrete layer 201 and is used as pedestal, when construction, in changeover portion 3 and a left side
RightWall Duan Jun pours the C30 concrete of thick 50CM as pedestal, which has wrapped up steel arch-shelf 202.
When construction, it is laid with steel mesh in the basement rock layer surface of arch, changeover portion 3 and left and right abutment wall section, then sprays C25 coagulation
Soil forms the gunning concrete layer 203 of thickness 15cm；
Steel arch-shelf 202 is laid on 203 surface of gunning concrete layer；
Perpendicular concrete layer is formed in the C30 concrete that the steel arch-shelf surface of changeover portion 3 and left and right abutment wall section pours thick 50CM
201.Perpendicular concrete layer 201 carries out single layer arrangement of reinforcement, and reinforcing steel bars exposed length is 0.5m and 1.5m and length interlaced arrangement, so as to it is rear
The arrangement of reinforcement of continuous concrete sidewall lining cutting effectively connects.
For the ease of fixed supporting construction, it is reserved with multiple rows of joint grouting hole 204 from top to down in perpendicular concrete layer 201,
When practical application, the aperture in joint grouting hole is 50mm, and the joint grouting hole longitudinal direction array pitch in every row is 2.5m.
Illustrate: the present embodiment longitudinal direction above and described below is along cavern's axis direction, and longitudinal array pitch is i.e. along hole
The spacing in chamber axis direction, vertical array pitch are the spacing from vault to left and right abutment wall section lower end from top to bottom or from top to bottom.
During big cross section cavern excavation, fault belt can be encountered, country rock instability problem is prominent, excavates and supporting is difficult
Spend larger, existing technological means is it is difficult to ensure that safety during big cross section cavern excavation, sleeping work progress under being especially layered
In, supporting how is carried out in advance, guarantees construction safety, without more effective measures.
To solve the above-mentioned problems, supporting construction is made following improvement by the utility model, first will left and right before improving
Abutment wall Duan Jun is divided into four sections of regions from top to down, i.e. left and right abutment wall Duan Jun includes the first segment being arranged from top to down, second segment,
Three sections and the 4th section, and the sectional area of leftwall section and RightWall section corresponds.The height in every section of region is no more than 5m.
In the present embodiment, first segment, second segment, third section and the 4th section of height are respectively 3.41m, 5m, 5m and 5m.
Supporting construction includes being separately connected with 3 upper end of changeover portion, first segment upper end, second segment upper end and third section upper end
And the prestress anchorage cable 4 of a row of subjacent bed or more is stretched to, the longitudinal array pitch of the prestress anchorage cable 4 in every row is 4m, prestressed anchor
The length of rope 4 is 20m-50m, the preferred 1500KN of prestress anchorage cable, and in practical applications, the grouted part of prestress anchorage cable needs
Positioned at III class surrounding rock.
Be briefly described to surrounding rock category: the stable structure degree of country rock is successively deteriorated from I-V class, wherein I class is enclosed
The stabilized structure of rock, surrounding rock structure is best, and the structure of V class surrounding rock is least firm, and surrounding rock structure is worst.
Supporting construction further includes the first dowel beam 5 of the row set gradually from vault two sides lower end to arch springing or more, this reality
Applying example is six rows, and longitudinal array pitch of the first dowel beam 5 in every row is 1.5m, and the vertical array pitch of every row is 1.5m, the first dowel
The length of beam 5 is 12m.
Supporting construction further includes multiple rows of second dowel beam that is setting gradually from changeover portion 3 to the 4th section and stretching to subjacent bed
6, the longitudinal array pitch of the second dowel beam 6 in every row is 1.5m, and 6 length of the second dowel beam is 12m.
Supporting construction further includes the multiple rows of system anchor bolt 7 set gradually from vault to vault two sides lower end, and in every row is
The longitudinal array pitch of anchor pole 7 of uniting is 0.75m, and the vertical array pitch of every row is 1.5m, and each platoon leader is short interval-staggered, and the present embodiment is
14 rows, preferably long system anchor bolt 7 are 9m, and short system anchor bolt is 6m, system anchor bolt 7 in practical application, exposed 0.5m,
And the system anchor bolt 7 of vault two sides lower end and the first dowel beam 5 are interval-staggered.
Supporting construction further includes being separately connected with 3 lower end of changeover portion, first segment lower end, second segment lower end, third section lower end
And stretch to subjacent bed a row more than advance anchor bolt 8, longitudinal array pitch of advance anchor bolt 8 is 1.5m, each installation point it is super
Preceding anchor pole 8 includes long advance anchor bolt and short advance anchor bolt, and the present embodiment is a row, and long advance anchor bolt is 9m, short advance anchor bolt
For 6m, each installation point includes 3 root long advance anchor bolts and 2 short advance anchor bolts, is successively set from top to down from installation point
Set 3 root long advance anchor bolts and 2 short advance anchor bolts.
Prestress anchorage cable 4 passes through gunning concrete layer 203, steel arch-shelf 202 and perpendicular concrete layer 201 and is fixed and exposes
Perpendicular concrete layer 201.
One end of advance anchor bolt 8 extends into the joint grouting hole advanced consolidation grouting of progress and fixes.
First dowel beam 5, the second dowel beam 6 and system anchor bolt 7 are effectively connect with steel arch-shelf.
Crouch the shear-zone big cross section that excavation supporting structure is A class hole section under a kind of shear-zone big cross section cavern of the present embodiment
Crouch excavation supporting structure under cavern, and the present embodiment is suitable for V class surrounding rock.
Embodiment 2
As shown in figure 3, the excavation supporting structure that crouches under a kind of shear-zone big cross section cavern of the present embodiment is the disconnected of B class hole section
Crouch excavation supporting structure under layer band big cross section cavern, and the present embodiment is suitable for IV class surrounding rock.
The present embodiment place different from embodiment 1 is:
Supporting construction include with it is more than 3 upper end of changeover portion and a row that is that first segment upper end is separately connected and stretching to subjacent bed
Prestress anchorage cable 4, the longitudinal array pitch of prestress anchorage cable 4 in every row is 4m, and the length of prestress anchorage cable 4 is 20m-30m, is answered in advance
The preferred 1500KN of power anchor cable, and in practical applications, the grouted part of prestress anchorage cable need to be located at III class surrounding rock.
Supporting construction further include with second segment upper end and a row that is that third section upper end is separately connected and stretching to subjacent bed with
On prestressed anchor 9, the longitudinal array pitch of prestressed anchor 9 in every row is 3m, and the length of prestressed anchor 9 is 12m-24m, in advance
The preferred 450KN of stress anchor pole.
It can be seen that compared with the excavation supporting structure that crouches under the shear-zone big cross section cavern of A class hole section, the second of the present embodiment
Duan Shangduan and third section upper end are all made of prestressed anchor 9 and replace prestress anchorage cable 4, are arranged closeer than prestress anchorage cable 4, long
Spend that shorter, prestressing force is smaller.
In practical application, prestress anchorage cable 4 pass through gunning concrete layer 203, steel arch-shelf 202 and perpendicular concrete layer 201 into
Row is fixed and exposes perpendicular concrete layer 201.
The prestressed anchor 9 of second segment upper end pass through gunning concrete layer 203, steel arch-shelf 202 and perpendicular concrete layer 201 into
Row is fixed and exposes perpendicular concrete layer 201.
The prestressed anchor 9 of third section upper end passes through gunning concrete layer 203 and is connected and fixed with steel arch-shelf 202.
As shown in figure 4, Fig. 3 is the excavation supporting structure that crouches under the big cross section cavern of tunnel-spillway F3 shear-zone and influence band
Top cross-sectional view.In figure, the excavation supporting structure that crouches under the shear-zone big cross section cavern of A class hole section is indicated with A, indicates B class with B
Crouch excavation supporting structure under the shear-zone big cross section cavern of hole section.
III, IV and V III class surrounding rock, IV class surrounding rock and V class surrounding rock are respectively indicated.
The shear-zone big cross section cavern for choosing B class hole section is respectively corresponded according to actual IV class surrounding rock and V class surrounding rock structure
Crouch under the shear-zone big cross section cavern of sleeping excavation supporting structure and A class hole section down excavation supporting structure.
The utility model is not limited to above-mentioned optional embodiment, anyone can obtain under the enlightenment of the utility model
Other various forms of products, however, making any variation in its shape or structure, all the utility model rights that falls into are wanted
The technical solution in confining spectrum is sought, is all fallen within the protection scope of the utility model.
Claims (10)
1. crouch excavation supporting structure under a kind of shear-zone big cross section cavern, it is characterised in that: including arch (1), left and right abutment wall section, with
And supporting construction, arch springing pass through changeover portion (3) respectively and are connected as one with left and right abutment wall section；
The left and right abutment wall Duan Jun includes the first segment being arranged from top to down, second segment, third section and the 4th section and leftwall section
It is corresponded with RightWall section, the first segment, second segment, third section and the 4th section of height are no more than 5m；
The supporting construction include with it is more than changeover portion upper end and a row that is that first segment upper end is separately connected and stretching to subjacent bed
Prestress anchorage cable (4), supporting construction is separately connected with second segment upper end and third section upper end and stretches to subjacent bed
A row more than prestress anchorage cable (4) or prestressed anchor (9)；
The supporting construction further includes being separately connected with changeover portion lower end, first segment lower end, second segment lower end and third section lower end
And stretch to subjacent bed a row more than advance anchor bolt (8).
2. crouch excavation supporting structure under a kind of shear-zone big cross section cavern according to claim 1, it is characterised in that: described
Arch includes the steel arch-shelf (202) and gunning concrete layer (203) set gradually from cavern surface along ground direction；
The changeover portion and left and right abutment wall Duan Jun include the perpendicular concrete layer set gradually from cavern surface along ground direction
(201), steel arch-shelf and gunning concrete layer；
Steel arch-shelf is wrapped up inside the perpendicular concrete layer, gunning concrete layer is sprayed at basement rock layer surface.
3. crouch excavation supporting structure under a kind of shear-zone big cross section cavern according to claim 2, it is characterised in that: described
Perpendicular concrete layer is reserved with multiple rows of joint grouting hole (204) from top to down, and the joint grouting hole longitudinal direction array pitch in every row is 2.5m,
The aperture in joint grouting hole is 50mm.
4. crouch excavation supporting structure under a kind of shear-zone big cross section cavern according to claim 1, it is characterised in that: served as
When cross that a section upper end, first segment upper end, second segment upper end and third section upper end be respectively provided with is prestress anchorage cable, prestress anchorage cable is vertical
It is 4m to array pitch, the length of prestress anchorage cable is 20m-50m, prestress anchorage cable 1500KN；
When changeover portion upper end and first segment upper end be provided that prestress anchorage cable and second segment upper end and third section upper end setting
When being prestressed anchor, prestress anchorage cable longitudinal direction array pitch is 4m, and the length of prestress anchorage cable is 20m-30m, and prestress anchorage cable is
1500KN, prestressed anchor longitudinal direction array pitch are 3m, and the length of prestressed anchor is 12m-24m, prestressed anchor 450KN.
5. crouch excavation supporting structure under a kind of shear-zone big cross section cavern according to claim 2, it is characterised in that: described
Prestress anchorage cable passes through gunning concrete layer, steel arch-shelf and perpendicular concrete layer and is fixed and exposes perpendicular concrete layer；
When second segment upper end and third section upper end are provided that prestressed anchor, the prestressed anchor of second segment upper end passes through spray
It applies concrete layer, steel arch-shelf and perpendicular concrete layer and is fixed and exposes perpendicular concrete layer, the prestressed anchor of third section upper end
It is connected and fixed across gunning concrete layer with steel arch-shelf.
6. special according to the excavation supporting structure that crouches under a kind of shear-zone big cross section cavern described in claim 2-5 any one
Sign is: the supporting construction further includes the first dowel beam of the row set gradually from vault two sides lower end to arch springing or more (5),
The first dowel beam is connect with steel arch-shelf, and longitudinal array pitch of the first dowel beam is 1.5m, and the length of the first dowel beam is 12m.
7. special according to the excavation supporting structure that crouches under a kind of shear-zone big cross section cavern described in claim 2-5 any one
Sign is: the supporting construction further includes multiple rows of second dowel that is setting gradually from changeover portion to the 4th section and stretching to subjacent bed
Beam (6), the second dowel beam are connect with steel arch-shelf, and the second dowel beam longitudinal direction array pitch in every row is 1.5m, and the second dowel beam is long
Degree is 12m.
8. crouch under a kind of shear-zone big cross section cavern described in -5 any one excavation supporting structure according to claim 1, special
Sign is: the supporting construction further includes the multiple rows of system anchor bolt (7) set gradually from vault to vault two sides lower end, in every row
System anchor bolt longitudinal direction array pitch be 0.75m, the vertical array pitch of every row is 1.5m, and each platoon leader is short interval-staggered.
9. crouch excavation supporting structure under a kind of shear-zone big cross section cavern according to claim 3, it is characterised in that: described
Supporting construction further include be separately connected with changeover portion lower end, first segment lower end, second segment lower end, third section lower end and under stretching to
Longitudinal array pitch of advance anchor bolt (8) more than one row of sleeping layer, advance anchor bolt is 1.5m, and the advance anchor bolt of each installation point wraps
Include long advance anchor bolt and short advance anchor bolt.
10. crouch excavation supporting structure under a kind of shear-zone big cross section cavern according to claim 9, it is characterised in that: institute
The one end for stating advance anchor bolt extends into the joint grouting hole advanced consolidation grouting of progress and fixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821007984.6U CN208379557U (en) | 2018-06-27 | 2018-06-27 | Crouch excavation supporting structure under a kind of shear-zone big cross section cavern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821007984.6U CN208379557U (en) | 2018-06-27 | 2018-06-27 | Crouch excavation supporting structure under a kind of shear-zone big cross section cavern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208379557U true CN208379557U (en) | 2019-01-15 |
Family
ID=64964762
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821007984.6U Expired - Fee Related CN208379557U (en) | 2018-06-27 | 2018-06-27 | Crouch excavation supporting structure under a kind of shear-zone big cross section cavern |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228132A (en) * | 2020-09-17 | 2021-01-15 | 中国矿业大学(北京) | Flexible isolation structure of cross-section tunnel and rock mass large deformation control method |
-
2018
- 2018-06-27 CN CN201821007984.6U patent/CN208379557U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228132A (en) * | 2020-09-17 | 2021-01-15 | 中国矿业大学(北京) | Flexible isolation structure of cross-section tunnel and rock mass large deformation control method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.7 Tianyun Road, high tech Zone, Chengdu, Sichuan 610000 Patentee after: Guoneng Dadu River Basin Hydropower Development Co.,Ltd. Address before: No.7 Tianyun Road, high tech Zone, Chengdu, Sichuan 610000 Patentee before: DADU RIVER HYDROPOWER DEVELOPMENT Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190115 Termination date: 20210627 |
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| CF01 | Termination of patent right due to non-payment of annual fee |