CN204344141U - Soft rock tunnel bracing members advanced stand device - Google Patents
Soft rock tunnel bracing members advanced stand device Download PDFInfo
- Publication number
- CN204344141U CN204344141U CN201420750374.0U CN201420750374U CN204344141U CN 204344141 U CN204344141 U CN 204344141U CN 201420750374 U CN201420750374 U CN 201420750374U CN 204344141 U CN204344141 U CN 204344141U
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- bracing members
- forestope
- tunnel
- removable
- bearing
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Abstract
The utility model relates to a kind of soft rock tunnel bracing members advanced stand device, and described device comprises multiple bracing members, removable forestope, multiple forestope bearing and supporting member; Bracing members is the arch consistent with the crag shape in the cross section of tunnel, and each bracing members to be set in turn on the cross section of tunnel according to predetermined space and to install near crag; Forestope bearing can releasably be arranged on bracing members, and comprises the cavity for keeping removable forestope; Removable forestope is arranged along the radial direction of tunnel, and through cavity, by the connection between forestope bearing and bracing members, removable forestope hangs the below being arranged at bracing members; Described removable forestope can the radial direction along tunnel in the cavity of multiple forestope bearing move linearly; Be provided with supporting member between the bracing members of two vicinities, each supporting member is arranged between removable forestope and the crag of tunnel.
Description
Technical field
The utility model relates to tunnel construction field, particularly a kind of soft rock tunnel bracing members advanced stand device.
Background technology
Generally soft rock tunnel adopts bracing members as supporting in advance mostly, according to cut surface character and the geological conditions of tunnel, by adjustment bracing members spacing, bracing members model, supporting and protection structure etc. with the change of suitable for surrounding rock, thus ensures construction safety.In addition, conveniently transport, install, in place, bracing members carries out segmentation, merogenesis manufacture according to the cut surface character of tunnel usually, then assembled at the construction field (site) and be rigidly connected.The method of erection bracing members the most frequently used at present mainly contains following two kinds:
1, tunneling boring once sets up method: after tunnel tunneling boring once excavates an advance of working cycle, first bracing members is assembled into entirety, then installation erection is in place.The major defect of this method is after tunnel excavation, and top board open-assembly time is long, unfavorable to adjoining rock stability, and construction safety condition is poor.Therefore, this method generally compared with light section and Wall Rock of Tunnel condition relatively better, apply under the stronger geological conditions of self-stable ability more.
2, limit, crown gradation erection method: tunnel adopts the step digging mode at the first arch rear end, after Arch Excavation advance of working cycle, the bracing members of erection crown section, utilizes anchor pole to be fixed on the wall of hole or relies on anchor pole to hang, making it have certain enabling capabilities; Then, complete the excavation of bottom and support installation work.Although this method has evaded the shortcoming of a tunneling boring erection method to a certain extent, anchor bolt construction difficulty is large, especially not good to breaking surrounding rock support effect, larger to tunnel of large section difficulty of construction.
The outstanding shortcoming all existed in two kinds of more than conventional erection methods is: 1, top board open-assembly time is relatively long, is unfavorable for adjoining rock stability; 2, can not adjust bracing members spacing at random, universal performance is poor; 3, the basic principle of constructing tunnel can not be embodied; namely the theory from support capacity, immediate support of country rock is made full use of; especially in the work progresss such as bottom excavation, supporting top board once appearance landslide, fall the phenomenons such as block, cannot the safety of available protecting constructor.
In sum, a kind of soft rock tunnel bracing members advanced stand device that can overcome above-mentioned shortcoming is provided, becomes those skilled in the art's problem demanding prompt solution.
The information being disclosed in this utility model background technology part is only intended to deepen the understanding to general background technology of the present utility model, and should not be regarded as admitting or imply in any form that this information structure has been prior art known in those skilled in the art.
Utility model content
For solving the problem, the utility model provides a kind of soft rock tunnel bracing members advanced stand device.
In order to achieve the above object, the utility model provides a kind of soft rock tunnel bracing members advanced stand device, and it comprises: multiple bracing members, removable forestope, multiple forestope bearing and supporting member; Described bracing members is the arch consistent with the crag shape in the cross section of tunnel, and each bracing members to be set in turn on the cross section of tunnel according to predetermined space and to install near crag; Described forestope bearing can releasably be arranged on described bracing members, and comprises the cavity for keeping removable forestope; Described removable forestope is arranged along the radial direction of tunnel, and passes the cavity of multiple forestope bearing, and by the connection between described forestope bearing and bracing members, described removable forestope hangs the below being arranged at bracing members; Described removable forestope can the radial direction along tunnel in the cavity of multiple forestope bearing move linearly; Be provided with supporting member between the described bracing members of two vicinities, each supporting member is arranged between removable forestope and the crag of tunnel.
Preferably, described soft rock tunnel bracing members advanced stand device comprises anchor pole and concrete further, and it is inner that described anchor pole radially inserts the crag being arranged at tunnel, and described concrete covers the region surface at supporting member place.
Preferably, described soft rock tunnel bracing members advanced stand device comprises mobile device further, and described mobile device drives described removable forestope to move.
Preferably, described forestope bearing is hanging support or fixed bearing.
Preferably, described supporting member is net structure or back board structure; Described net structure is wire lath or plastic wire.
The beneficial effects of the utility model are: the utility model structure is simple and easy to make, safe and reliable and flexible structure is changeable, can have enough to meet the need use in addition, reduce the cost of production and application.
Accompanying drawing explanation
By Figure of description and subsequently together with Figure of description for illustration of the detailed description of the invention of some principle of the utility model, the further feature that the utility model has and advantage will become clear or more specifically be illustrated.
Fig. 1 is the schematic cross-sectional view according to soft rock tunnel bracing members advanced stand device of the present utility model.
Fig. 2 is according to schematic diagram during soft rock tunnel bracing members advanced stand device use of the present utility model.
Fig. 3 is according to soft rock tunnel bracing members advanced stand device using method flow chart of the present utility model.
Critical piece symbol description:
1 development machine
2 bracing members
3 removable forestopes
4 forestope bearings
6 supporting members
7 concrete
8 anchor poles.
Detailed description of the invention
Set forth a lot of detail in the following description so that fully understand the utility model.But the utility model can be much different from alternate manner described here to implement, those skilled in the art can when doing similar popularization without prejudice to when the utility model intension, and therefore the utility model is by the restriction of following public specific embodiment.
Below, by reference to the accompanying drawings specific embodiment of the utility model is described.Refer to shown in Fig. 1 and Fig. 2, the utility model, according to tunnel bracing members design feature, provides a kind of structure simple, safe and reliable, easy to operate, flexible and changeable and has the soft rock tunnel bracing members advanced stand device of certain advance support function.Described soft rock tunnel bracing members advanced stand device employing has the shaped steel of stronger rigidity (such as: i iron, seamless steel pipe, channel-section steel, square steel etc.) as front spy brace summer, and (cut surface character according to tunnel is generally no less than 2 to configure some, can arrange multiple when section is comparatively large or roof pressure is large, such as 4-10) the supporting seat (such as suspension type supporting seat or fixed supporting seat) be arranged on the bracing members at rear, then telescopic cantilever function is realized by artificial or mechanical system, brace summer can progressively be moved forward, to support the bracing members of the crown section of new erection, thus adapt to different section feature, excavation segment length, the bracing members installation process of the soft rock tunnels such as geological conditions change, to reach Fast Installation, immediate support, the object of available protecting construction safety, if desired, after top braces installation, within a short period of time completes anchor pole, concrete spraying support again, closes country rock in time and forms fixing supporting and protection structure.
Particularly, as shown in Figure 1, soft rock tunnel bracing members advanced stand device of the present utility model comprises bracing members 2 (arch bracing members), removable forestope 3, forestope bearing 4, supporting member 6 and mobile device (not shown).
Tunnel can be divided into two parts to excavate, and first excavates the first half (topping bar), in the installation of first half suspension device and after the first half excavated, then carries out the excavation (getting out of a predicament or an embarrassing situation) of Lower Half.As shown in Figure 1, multiple bracing members 2 to be set in the process of whole excavation, and be along with the carrying out of excavating arranges new bracing members seriatim.Particularly, bracing members 2 is designed to the arch consistent with the crag shape approximation in the cross section of tunnel, and the crag of tunnel is close in the cross section being arranged at tunnel, and along with the carrying out of excavating constantly arranges new bracing members, spacing between each bracing members is d, this spacing d can regulate according to actual environment, such as: 1m-3m; Removable forestope 3 arranges along the radial direction of tunnel, as shown in Figure 1, namely in view of the cross section of tunnel, correspond to many removable forestopes 3 below a bracing members 2 and (in Fig. 1, illustrate only 3, also many can be arranged as required, such as: 4-8 root), thus the effect of the tunnel supporting whole arc can be reached; And by the connection between forestope bearing 4 and bracing members 2, removable forestope 3 forms cantilever beam structures with the bracing members (seeing in Fig. 2 that 2-7 bracing members is the bracing members arranged from left to right) arranged, and this cantilever beam structures can reach the object supporting new bracing members (seeing in Fig. 2 that the 1st bracing members is new bracing members from left to right).Particularly, described forestope bearing 4 is removable installed on bracing members 2 that (wherein forestope bearing 4 can arrange multiple according to actual environment, such as: 4-10), its spacing is also d, described forestope bearing 4 can be hanging support or fixed bearing, can hang or buckle on bracing members 2, removable forestope 3 passes the cavity of multiple forestope bearing 4 and is supported by forestope bearing 4, and then by removably connecting between forestope bearing 4 and bracing members, whole removable forestope 3 suspension is made to be arranged on the below of the bracing members arranged and to support new bracing members with cantilever beam structures, the removable forestope of every root 3 can the radial direction along tunnel in the cavity of its multiple forestope bearings 4 of correspondence move linearly, it moves is rely on the driving of described mobile device (generally artificial namely removable, also loader can be utilized, excavator, the mobile device auxiliary moving such as development machine).Supporting member 6 is provided with between the bracing members 2 of every two vicinities, and each supporting member is also designed to be similar to consistent arch with the transverse shape of tunnel, and be arranged between removable forestope 3 and the crag of tunnel and be close to crag, wherein supporting member 6 can be net structure (such as: wire lath or plastic wire) or back board structure.
Soft rock tunnel bracing members advanced stand device of the present utility model can further include anchor pole 8 and concrete seven, it is inner that anchor pole 8 radially inserts the crag being arranged at tunnel, concrete seven be then cover supporting member 6 place region surface to close.
Described removable forestope 3 forms cantilever beam structures with the bracing members 2 set, then along with the carrying out of excavation, every a certain distance d, a new bracing members is set and is supported by cantilever beam structures, particularly, under the effect of mobile device, the radial direction that removable forestope 3 supports along tunnel in its multiple forestope bearings 4 in correspondence linearly moves forward, the fore-end moving spacing d (predetermined space) removable forestope 3 afterwards moves on to new bracing members place (arrow indicated direction is excavate the direction of advancing in fig. 2), and after the end section of removable forestope 3 leaves last forestope bearing 4, be installed on the new bracing members in one, foremost after last forestope bearing 4 can being pulled down, so repeatedly, removable forestope 3 is progressively moved forward and bracing members 2 also sets up forward one by one.In addition, often a mobile spacing d, be then close to crag surface and arrange a supporting member 6 between every two bracing members, such as, be lay wire lath on crag surface or arrange backboard, plays safety protection functions such as preventing falling rocks.
According to the structure of said apparatus, segment length and the excavation method (such as: embedded groove type excavation method) of excavation can be adjusted according to the crag situation disclosed in mining process in good time, such as adjust the spacing d of removable forestope at every turn between the spacing d of movement forward and each forestope fixed bearing of the corresponding same forestope of adjustment simultaneously, thus form effective advance support structure, and after the first half (topping bar) of tunnel has supported with said apparatus, carry out the excavation of tunnel Lower Half (getting out of a predicament or an embarrassing situation) again, support the work such as setting and supporting.
Below in conjunction with Fig. 2 and Fig. 3, the using method of soft rock tunnel bracing members advanced stand device of the present utility model is described in detail, described using method comprises: to be arranged at by removable forestope below the bracing members that arranged by forestope bearing at the part place that excavates of tunnel, removable forestope is made to form cantilever beam structures with the bracing members arranged, particularly, utilize development machine 1 (also can be loader at the part place excavated of tunnel, excavator, weight lifting arm etc.) or manual type first the bracing members 2 arranged is placed on removable forestope 3, and to be connected with bracing members 2 with forestope bearing 4 thus fixed,
A) first half of the new excavation part of tunnel is excavated;
B) with predetermined space, a new bracing members is set in the new excavation part of tunnel, removable forestope is moved after this predetermined space to new bracing members place;
Along with the carrying out of excavation, every a certain distance d (predetermined space), a new bracing members is set, and under the effect of mobile device, the radial direction of removable forestope 3 along tunnel in its multiple forestope bearings 4 of correspondence linearly moves forward, after moving spacing d, the fore-end of removable forestope 3 moves on to new bracing members place and supports this new bracing members with cantilever beam structures, and after the end section of removable forestope 3 leaves last forestope bearing 4, be installed on the new bracing members of foremost after last forestope bearing 4 can being pulled down,
C) between new bracing members and the contiguous bracing members arranged, be close to crag surface and supporting member is set;
Between new bracing members and the contiguous bracing members arranged, be close to crag surface supporting member 6 is set, such as, lay wire lath or backboard is set.Each supporting member is also designed to be similar to consistent arch with the transverse shape of tunnel, and to be arranged between removable forestope 3 and the crag of tunnel and to be close to crag;
Step C) in can further include: in crag inside in radioactively inserting skyhook 8 to support crag inside, and at the surperficial sprayed mortar 7 of supporting member 6 to close;
D) above-mentioned steps A is repeated) to C), until the first half of the new excavation part of tunnel has excavated;
E) complete the excavation of the Lower Half of the new excavation part of tunnel, support setting, support work.
For concrete tunnel structure, an embodiment is described in detail below.Particularly, the tunnel of excavation is supply tunnel, and its excavated section is the flat shape of a hoof, excavation height 4.15 meters, bottom width 3.6 meters.
Utilize development machine 1 (to be first placed on removable forestope 3 by the bracing members 2 arranged, and to be connected with bracing members 2 with forestope bearing 4 thus fixed at the part place excavated of tunnel;
A) first half of the new excavation part of tunnel is excavated;
B) with predetermined space, a new bracing members is set in the new excavation part of tunnel, removable forestope is moved after this predetermined space to new bracing members place;
Along with the carrying out of excavation, every a certain distance d, a new bracing members is set, bracing members spacing is determined according to surrounding rock stability, scope is being 1-1.3 rice, and under the effect of mobile device, the radial direction of removable forestope 3 along tunnel in its multiple forestope bearings 4 of correspondence linearly moves forward, after moving spacing d, the fore-end of removable forestope 3 moves on to new bracing members place and supports this new bracing members with cantilever beam structures, and after the end section of removable forestope 3 leaves last forestope bearing 4, be installed on the new bracing members of foremost after last forestope bearing 4 can being pulled down,
C) between new bracing members and the contiguous bracing members arranged, be close to crag surface and supporting member is set;
Between new bracing members and the contiguous bracing members arranged, be close to crag surface supporting member 6 is set, such as, lay wire lath or backboard is set.Each supporting member is also designed to be similar to consistent arch with the transverse shape of tunnel, and to be arranged between removable forestope 3 and the crag of tunnel and to be close to crag; In crag inside in radioactively inserting skyhook 8 to support crag inside, the spacing of anchor pole 8 is 1-1.5 rice, and at the surperficial sprayed mortar 7 of supporting member 6 to close;
D) above-mentioned steps A is repeated) to C), until the first half of the new excavation part of tunnel has excavated;
E) complete the excavation of the Lower Half of the new excavation part of tunnel, support setting, support work.
Above-described embodiment is for illustrative principle of the present utility model and effect thereof, but the utility model is not limited to above-mentioned embodiment.Those skilled in the art all without prejudice under spirit of the present utility model and category, in claims, can modify to above-described embodiment.Therefore protection domain of the present utility model, should cover as claims of the present utility model.
Claims (5)
1. a soft rock tunnel bracing members advanced stand device, is characterized in that: described soft rock tunnel bracing members advanced stand device comprises multiple bracing members (2), removable forestope (3), multiple forestope bearing (4) and supporting member (6);
Described bracing members (2) is the arch consistent with the crag shape in the cross section of tunnel, and each bracing members (2) be set in turn in tunnel according to predetermined space (d) cross section on and install near crag;
Described forestope bearing (4) can releasably be arranged on described bracing members (2), and comprises the cavity for keeping removable forestope (3);
Described removable forestope (3) is arranged along the radial direction of tunnel, and through the cavity of multiple forestope bearing (4), by the connection between described forestope bearing (4) and bracing members (2), the suspension of described removable forestope (3) is arranged at the below of bracing members (2); Described removable forestope (3) can the radial direction along tunnel in the cavity of multiple forestope bearing (4) move linearly;
Be provided with supporting member (6) between the described bracing members (2) of two vicinities, each supporting member (6) is arranged between removable forestope (3) and the crag of tunnel.
2. soft rock tunnel bracing members advanced stand device according to claim 1, it is characterized in that: described soft rock tunnel bracing members advanced stand device comprises anchor pole (8) and concrete (7) further, it is inner that described anchor pole (8) radially inserts the crag being arranged at tunnel, and described concrete (7) covers the region surface at supporting member (6) place.
3. soft rock tunnel bracing members advanced stand device according to claim 2, is characterized in that: described soft rock tunnel bracing members advanced stand device comprises mobile device further, and described mobile device drives described removable forestope (3) mobile.
4. soft rock tunnel bracing members advanced stand device according to claim 3, is characterized in that: described forestope bearing (4) is hanging support or fixed bearing.
5. soft rock tunnel bracing members advanced stand device according to claim 4, is characterized in that: described supporting member (6) is net structure or back board structure; Described net structure is wire lath or plastic wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420750374.0U CN204344141U (en) | 2014-12-03 | 2014-12-03 | Soft rock tunnel bracing members advanced stand device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420750374.0U CN204344141U (en) | 2014-12-03 | 2014-12-03 | Soft rock tunnel bracing members advanced stand device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204344141U true CN204344141U (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420750374.0U Expired - Fee Related CN204344141U (en) | 2014-12-03 | 2014-12-03 | Soft rock tunnel bracing members advanced stand device |
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| Country | Link |
|---|---|
| CN (1) | CN204344141U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453952A (en) * | 2014-12-03 | 2015-03-25 | 中国长江三峡集团公司 | Soft rock tunnel steel support pre-support device and using method thereof |
| CN107387137A (en) * | 2017-09-13 | 2017-11-24 | 淮南矿业(集团)有限责任公司 | A kind of monorail crane front-probe support operating platform and method |
-
2014
- 2014-12-03 CN CN201420750374.0U patent/CN204344141U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453952A (en) * | 2014-12-03 | 2015-03-25 | 中国长江三峡集团公司 | Soft rock tunnel steel support pre-support device and using method thereof |
| CN104453952B (en) * | 2014-12-03 | 2016-08-24 | 中国长江三峡集团公司 | Soft rock tunnel bracing members advanced stand device and using method thereof |
| CN107387137A (en) * | 2017-09-13 | 2017-11-24 | 淮南矿业(集团)有限责任公司 | A kind of monorail crane front-probe support operating platform and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20151203 |
|
| EXPY | Termination of patent right or utility model |