CN103422865A - Tunnel excavation plastic cutter and tunnel arc-shaped excavation method for weak surrounding rock section - Google Patents
Tunnel excavation plastic cutter and tunnel arc-shaped excavation method for weak surrounding rock section Download PDFInfo
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- CN103422865A CN103422865A CN2013103716358A CN201310371635A CN103422865A CN 103422865 A CN103422865 A CN 103422865A CN 2013103716358 A CN2013103716358 A CN 2013103716358A CN 201310371635 A CN201310371635 A CN 201310371635A CN 103422865 A CN103422865 A CN 103422865A
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Abstract
The invention provides a tunnel excavation plastic cutter for a weak surrounding rock section. The tunnel excavation plastic cutter comprises a cutter handle, wherein the front end of the cutter handle is provided with a plastic cutter bit. A tunnel arc-shaped excavation method for the weak surrounding rock section comprises the following construction steps of a, manufacturing an excavation plastic cutter and fixedly arranging plastic cutter clamping grooves on the left side face and the right side face of an excavator bucket; b, before the excavation working procedure is carried out, fixedly arranging the cutter handle of the excavation plastic cutter on the plastic cutter clamping grooves; c, through changing the excavation angle of the excavator bucket, carrying out arc-shaped excavation or horizontal wall scraping on parts, such as a tunnel arch part, a tunnel side wall and a tunnel inverted arch along a weak surrounding rock tunnel excavation contour line by the working end of the plastic cutter bit; and d, detaching the plastic cutter bit from the excavator bucket after the excavation is finished. The tunnel excavation plastic cutter is used for excavating the weak surrounding rock tunnel and has a little disturbance on surrounding rock, stress concentration is avoided, the back break problem of the tunnel is effectively controlled, the footage driving cycle time is shortened, a good condition is created for supporting, the surrounding rack is protected, and the carrying capability of the surrounding rock is fully exerted.
Description
Technical field
The invention belongs to the construction tunnel excavation technology, be specifically related to a kind ofly can reduce disturbance to country rock, and can form the plastic cutter of the tunnel excavation for the weak surrounding rock location of smoother excavation contour line, the invention still further relates to the earth tunnel excavation methods such as expansive soil.
Background technology
At present, the method for tunnel construction that China's mountain tunnel extensively adopts is New Austrian Tunneling Method.New Austrian Tunneling Method is under the prerequisite of the carrying usefulness of utilizing country rock itself to have, adopts the technology such as smooth blasting to be excavated, the preliminary bracing that to carry out immediately take anchor pole, steel mesh reinforcement, steelframe, pneumatically placed concrete etc. after tunnel cutting be support form; The effect of preliminary bracing is mainly drag, constraint country rock excessive deformation to be provided, the supporting capacity of country rock body self is brought into play to greatest extent for country rock, and make rock mass become main supporting body after geostatic stress heavily distributes, tunnel structure system (supporting-country rock system) applies secondary lining after reaching and stablizing again, and secondary lining has been mainly safety stock and decoration effect.
New Austrian Tunneling Method almost becomes a kind of basic skills of building tunnel in the weak broken wall rock location, and technical economic benefit is obvious.Because rock mass is the main load bearing unit in the tunnel structure system; rock mass must adequately protect in construction; reduce the disturbance to it as far as possible; avoid excessively destroying the intensity of rock mass; and make the tunnel cross-section shape should be smoother as far as possible; with the stress of avoiding corner, concentrate, for the stress performance that improves supporting and protection structure creates conditions.
In a large amount of underground construction practices, it is widely acknowledged tunnel and underground excavation engineering, particularly in the weak broken wall rock location, build tunnel and underground construction, its key problem is all summed up on excavation and two critical processes of supporting.Wherein, Excavation Problems is how to excavate could more be conducive to the stable of cavern and be convenient to supporting.The technical problem that prior art exists is: the explosion of weak surrounding rock location, the tunnel excavation such as artificial exist large to the country rock disturbance, the excavation aftershaping is smoother not, efficiency of construction waits slowly.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of plastic cutter of the tunnel excavation for the weak surrounding rock location simple in structure, easy to use, and another technical problem that the present invention will solve is to provide the arc excavation method of a kind of tunnel for the weak surrounding rock location.
In order to solve the problems of the technologies described above, technical scheme provided by the invention is as follows: a kind of plastic cutter of the tunnel excavation for the weak surrounding rock location is characterized in that: comprise handle of a knife, the handle of a knife front end is provided with the plastic cutter cutter head.
The arc excavation method of a kind of tunnel for the weak surrounding rock location comprises following construction sequence:
A. make the excavation plastic cutter, and at the left and right side of excavator-type shovel clamshell excavator fixed installation plastic cutter draw-in groove;
B. before carrying out excavating sequences, the handle of a knife of excavation plastic cutter is fixedly installed in to the plastic cutter draw-in groove;
C. by changing the excavation angle of excavator-type shovel clamshell excavator, use the working end of plastic cutter cutter head along the Support System in Soft Rock Tunnels excavation contour line, respectively the positions such as arch, tunnel, tunnel side wall, tunnel invert are carried out the arc excavation or laterally scraped wall;
D., after having excavated, will excavate plastic cutter and disassemble from excavator-type shovel clamshell excavator.
Operating principle of the present invention: at the position of conventional excavation machinery inconvenience construction, on excavator-type shovel clamshell excavator, left and right side is installed excavation plastic cutter (see figure 1), utilize and hook the excavation that the plastic cutter cutter head carries out the positions such as Support System in Soft Rock Tunnels step Core Soil arc face, abutment wall and inverted arch, carry out the arc excavation or laterally scrape wall, make face curved wall and peripheral hole wall smooth-going smooth, when reducing the country rock disturbance, avoided the stress of tunnel excavation wall to concentrate.
The present invention has following beneficial effect: when the excavation plastic cutter excavates for Support System in Soft Rock Tunnels, method is simple, to not infringement of bucket, only need the plastic cutter draw-in groove be set in the bucket both sides of making a summary, less to human and material resources consumption, simultaneously less to the disturbance of country rock, avoid stress to concentrate, and can effectively control the Tunnel Overbreak & Underbreak problem and reduce the cyclic advance time.Can really embody the basic principle of New Austrian Tunneling Method constructions such as " short drilling depth, early supporting, fast sealing, the diligent measurements " in poor Modelling of Tunnel Excavation in Soft Rock in rock matter weakness, developmental joint fissure, rock crushing, resistance to overturning; for supporting creates good conditions and protects country rock; give full play to the supporting capacity of country rock self, guarantee the stable and construction safety of Tunneling System.The employing of plastic cutter arc excavation new technology, it is the comprehensive embodiment of the construction concept that people-oriented, engineers and technicians' collective productions, be applicable to the to expand excavation in the tunnel under the multiple conditions such as soft rock and broken weak surrounding rock, made outstanding contributions for being reduced in the risk of excavating in the expansion soft rock tunnel and increasing surrounding rock stability.
The accompanying drawing explanation
Fig. 1 is the perspective view of excavation plastic cutter,
Fig. 2 is the structural representation of the plastic cutter draw-in groove that is provided with of excavator-type shovel clamshell excavator left and right side,
Fig. 3 is the schematic diagram that the excavation plastic cutter is installed to the plastic cutter draw-in groove,
Fig. 4 is the schematic diagram after the installation of excavation plastic cutter,
Fig. 5 is the schematic diagram of excavation plastic cutter excavation face,
Fig. 6 is the schematic diagram of excavation plastic cutter excavation abutment wall,
Fig. 7 is the schematic diagram of excavation plastic cutter excavation inverted arch,
Fig. 8 is dismounting excavation plastic cutter schematic diagram.
In figure: 1-excavation plastic cutter, 11-plastic cutter cutter head, 12-handle of a knife, 2-excavator-type shovel clamshell excavator, 21-plastic cutter draw-in groove, 22-bucket side, 3-face, 4-abutment wall, 5-inverted arch.
The specific embodiment
Device embodiment
As shown in Figure 1: a kind of plastic cutter of the tunnel excavation for the weak surrounding rock location 1 is characterized in that: comprise handle of a knife 12, handle of a knife 12 front ends are provided with plastic cutter cutter head 11.Handle of a knife 12 is en plaque, and plastic cutter cutter head 11 is the centrum cutter head.Referring to Fig. 2 and Fig. 4: the left and right side 22 of excavator-type shovel clamshell excavator 2 is installed with plastic cutter draw-in groove 21, and handle of a knife 12 is fixedly installed in plastic cutter draw-in groove 21.
Embodiment of the method
The arc excavation method of a kind of tunnel for the weak surrounding rock location comprises following construction sequence:
A. make the excavation plastic cutter, referring to Fig. 2: and at the left and right side of excavator-type shovel clamshell excavator 2 22 fixed installation plastic cutter draw-in grooves 21;
B. referring to Fig. 3: before carrying out excavating sequences, the handle of a knife 12 of excavation plastic cutter 1 is fixedly installed in to plastic cutter draw-in groove 21 according to shown in Fig. 3 direction of arrow;
C. by changing the excavation angle of excavator-type shovel clamshell excavator 2, use the working end of plastic cutter cutter head 11 along the Support System in Soft Rock Tunnels excavation contour line, respectively the positions such as arch, tunnel, tunnel side wall 4, tunnel invert 5 are carried out the arc excavation or laterally scraped wall; Make face 3 curved walls and peripheral hole wall smooth-going smooth, when reducing the country rock disturbance, avoided the stress of tunnel excavation wall to concentrate; Figure 5 shows that the schematic diagram at excavation plastic cutter 1 excavation face 3 positions (remaining core soil in advance), when the tunneling face, excavation plastic cutter 1 is stage excavation from the bottom to top; Figure 6 shows that the schematic diagram at excavation plastic cutter 1 excavation abutment wall 4 positions, Figure 7 shows that the schematic diagram at excavation plastic cutter 1 excavation inverted arch 5 positions; Note forbidding to collide profile steel frame when excavation abutment wall 4 and inverted arch 5;
D. after having excavated, referring to Fig. 8: will excavate plastic cutter 1 and disassemble from excavator-type shovel clamshell excavator 2.
Claims (4)
1. the plastic cutter of the tunnel excavation for the weak surrounding rock location, it is characterized in that: comprise handle of a knife (12), handle of a knife (12) front end is provided with plastic cutter cutter head (11).
2. a kind of plastic cutter of the tunnel excavation for the weak surrounding rock location as claimed in claim 1, it is characterized in that: handle of a knife (12) is en plaque, and plastic cutter cutter head (11) is the centrum cutter head.
3. a kind of plastic cutter of the tunnel excavation for the weak surrounding rock location as claimed in claim 1 or 2, it is characterized in that: the left and right side (22) of excavator-type shovel clamshell excavator (2) is installed with plastic cutter draw-in groove (21), and handle of a knife (12) is fixedly installed in plastic cutter draw-in groove (21).
4. the arc excavation method of the tunnel for the weak surrounding rock location comprises following construction sequence:
A. make the excavation plastic cutter, and at the left and right side of excavator-type shovel clamshell excavator fixed installation plastic cutter draw-in groove;
B. before carrying out excavating sequences, the handle of a knife of excavation plastic cutter is fixedly installed in to the plastic cutter draw-in groove;
C. by changing the excavation angle of excavator-type shovel clamshell excavator, use the working end of plastic cutter cutter head along the Support System in Soft Rock Tunnels excavation contour line, respectively the positions such as arch, tunnel, tunnel side wall, tunnel invert are carried out the arc excavation or laterally scraped wall;
D., after having excavated, will excavate plastic cutter and disassemble from excavator-type shovel clamshell excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103716358A CN103422865A (en) | 2013-08-16 | 2013-08-16 | Tunnel excavation plastic cutter and tunnel arc-shaped excavation method for weak surrounding rock section |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103716358A CN103422865A (en) | 2013-08-16 | 2013-08-16 | Tunnel excavation plastic cutter and tunnel arc-shaped excavation method for weak surrounding rock section |
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| CN103422865A true CN103422865A (en) | 2013-12-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105040760A (en) * | 2015-07-09 | 2015-11-11 | 三一重型装备有限公司 | Multifunctional scraper box and digging device |
| CN106761800A (en) * | 2016-12-26 | 2017-05-31 | 中铁十九局集团第工程有限公司 | Support System in Soft Rock Tunnels excavation construction process |
| CN106812173A (en) * | 2017-04-10 | 2017-06-09 | 中国水利水电第七工程局成都水电建设工程有限公司 | A kind of modified earth tunnel excavates auxiliary equipment |
| CN107524452A (en) * | 2017-08-31 | 2017-12-29 | 中铁局集团有限公司 | A kind of tunnel excavation construction trimming device and finishing construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201722718U (en) * | 2010-06-12 | 2011-01-26 | 中铁十六局集团有限公司 | Excavator steel knife |
| CN201982104U (en) * | 2011-03-25 | 2011-09-21 | 中国水利水电第七工程局有限公司 | Excavation bucket of excavation bucket loader for tunnel driving |
| CN102421989A (en) * | 2009-05-14 | 2012-04-18 | 桑德威克采矿和建筑有限责任公司 | Cutting device for a mining machine |
| CN203248165U (en) * | 2013-04-10 | 2013-10-23 | 中铁十二局集团第二工程有限公司 | Excavating machine tool suitable for excavating at loess tunnel contour |
-
2013
- 2013-08-16 CN CN2013103716358A patent/CN103422865A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102421989A (en) * | 2009-05-14 | 2012-04-18 | 桑德威克采矿和建筑有限责任公司 | Cutting device for a mining machine |
| CN201722718U (en) * | 2010-06-12 | 2011-01-26 | 中铁十六局集团有限公司 | Excavator steel knife |
| CN201982104U (en) * | 2011-03-25 | 2011-09-21 | 中国水利水电第七工程局有限公司 | Excavation bucket of excavation bucket loader for tunnel driving |
| CN203248165U (en) * | 2013-04-10 | 2013-10-23 | 中铁十二局集团第二工程有限公司 | Excavating machine tool suitable for excavating at loess tunnel contour |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105040760A (en) * | 2015-07-09 | 2015-11-11 | 三一重型装备有限公司 | Multifunctional scraper box and digging device |
| CN106761800A (en) * | 2016-12-26 | 2017-05-31 | 中铁十九局集团第工程有限公司 | Support System in Soft Rock Tunnels excavation construction process |
| CN106812173A (en) * | 2017-04-10 | 2017-06-09 | 中国水利水电第七工程局成都水电建设工程有限公司 | A kind of modified earth tunnel excavates auxiliary equipment |
| CN107524452A (en) * | 2017-08-31 | 2017-12-29 | 中铁局集团有限公司 | A kind of tunnel excavation construction trimming device and finishing construction method |
| CN107524452B (en) * | 2017-08-31 | 2019-05-17 | 中铁一局集团有限公司 | A kind of tunnel excavation construction trimming device and finishing construction method |
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Application publication date: 20131204 |