CN204492852U - A kind of tunnel excavation temporary support system - Google Patents
A kind of tunnel excavation temporary support system Download PDFInfo
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- CN204492852U CN204492852U CN201520055136.2U CN201520055136U CN204492852U CN 204492852 U CN204492852 U CN 204492852U CN 201520055136 U CN201520055136 U CN 201520055136U CN 204492852 U CN204492852 U CN 204492852U
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- steelframe
- stull
- support system
- barrel
- temporary support
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Abstract
The utility model discloses a kind of tunnel excavation temporary support system, comprising: barrel steelframe, it is supported in tunnel internal, forms the arching system supporting tunnel inner wall; Junction steel plate, it is arranged at both sides relative bottom described barrel steelframe, and described junction steel plate is provided with connector, and described connector is by steel plate around the rectangular channel formed, and is provided with spring in described rectangular channel; Stull steelframe, it is the length-adjustable stull constituted by an active connection by two or more girder steels, the two ends of described stull steelframe by being flexibly connected with described barrel steelframe in the rectangular channel of the described connector of wedging, and are combined to form closed ring supporting mechanism with described barrel steelframe; And the two ends of described stull steelframe are supported mutually with described spring respectively.
Description
Technical field
The utility model relates to constructing tunnel field, particularly relates to a kind of tunnel excavation temporary support system.
Background technology
According to lithology and the geological structure of present construction of tunnel, country rock mainly contains III, IV, V level three ranks.Mainly there is bias voltage, shallow embedding, cave in tunnel, the bad geological phenomenon such as falling rocks, water burst.According to the geological conditions of country rock, the main construction method adopted has cut and cover method, benching tunnelling method, three step Temporary invert methods, three step false stull methods and refreshing side heading method.
Wherein, three step false stull fados are used for earthing and are less than 12 meters, fault belt and texture stratum V level country rock section.Three step false stull methods are after upper, middle step completes, and preliminary bracing increases false stull, form the supporting mechanism of temporary enclosed Cheng Huan, to reduce surrouding rock deformation.
In tunnel excavation process, along with the progress of construction, false stull needs to carry out dismounting and cycle installation at certain phase, again to form the supporting mechanism closing into ring in different positions, in prior art, the dismounting of false stull is comparatively complicated, and easily damage is caused to stull in repeated disassembled and assembled process, affect subsequent construction.In addition, because be rigidly connected between the steel of formation stull, length not easily regulates, and affects to support degree and ease of use.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of tunnel excavation temporary support system, improves dismounting convenience and the support degree of false stull in tunnel excavation support system.
Another object of the present utility model is, provides a kind of for the length-adjustable false stull in tunnel excavation.
Other objects with some for achieving the above object, the utility model adopts following technical scheme:
A kind of tunnel excavation temporary support system, comprising:
Barrel steelframe, it is supported in tunnel internal, forms the arching system supporting tunnel inner wall;
Junction steel plate, it is arranged at both sides relative bottom described barrel steelframe, and described junction steel plate is provided with connector, and described connector is by steel plate around the rectangular channel formed, and is provided with spring in described rectangular channel;
Stull steelframe, it is the length-adjustable stull constituted by an active connection by two or more girder steels, the two ends of described stull steelframe by being flexibly connected with described barrel steelframe in the rectangular channel of the described connector of wedging, and are combined to form closed ring supporting mechanism with described barrel steelframe; And the two ends of described stull steelframe are supported mutually with described spring respectively.
Preferably, in described tunnel excavation temporary support system, described connector is by fastening bolt or be weldingly fixed on described junction steel plate;
Described junction steel plate is also fixed on described barrel steelframe by the mode of fastening bolt or welding.
Preferably, in described tunnel excavation temporary support system, the position that the two ends of described stull steelframe are corresponding with on described connector is provided with pin-and-hole; Also be provided with steady pin, described stull steelframe and described connector are connected and fixed through described pin-and-hole by described steady pin.
Preferably, in described tunnel excavation temporary support system, movable connection method between described girder steel is: described girder steel is provided with the screw laterally running through described girder steel every 20-50cm, and being provided with the bolt matched with described screw, adjacent girder steel coordinates pivot joint by described bolt and screw.
Preferably, in described tunnel excavation temporary support system, described girder steel is lightweight I-beam.
Preferably, in described tunnel excavation temporary support system, also comprise diagonal brace, first end and the described stull steelframe of described diagonal brace are connected and fixed, certain position place on second end of described diagonal brace and described barrel steelframe is connected and fixed, and forms the triangular support mechanism be supported in described closed ring supporting mechanism.
Preferably, in described tunnel excavation temporary support system, the quantity of described diagonal brace is at least two; Angle between described diagonal brace and described stull steelframe is set to 45-75 degree.
The utility model has following beneficial effect: first, the utility model is by arranging the connector of rectangular groove-like in the two bottom sides of barrel steelframe, and spring is set in connector, stull steelframe two ends are made to realize conveniently by the mode in wedging connector and barrel steelframe, firmly be connected, and the spring of inside can produce certain tension force, improve stull steelframe to the support degree of barrel steelframe, make up rigidly connected deficiency, and certain length adjustment effect is played to stull steelframe.
Secondly, by the screw by multiple girder steels of formation stull steelframe being arranged certain intervals distance, connection and the dismounting of adjacent two girder steels is realized by bolt, Rewelding is avoided to cause damage with cutting to stull steelframe, and the convenient length regulating stull steelframe can be needed according to construction, improve its applicability.
Finally, the utility model, by removably arranging multiple diagonal brace between stull steelframe and barrel steelframe, can form multiple triangular support system in described closed ring support system inside, greatly can increase the structural stability of temporary support system.
Part is embodied by explanation below by other advantage of the present utility model, target and feature, part also will by research and practice of the present utility model by those skilled in the art is understood.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of tunnel excavation temporary support system described in the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is elaborated, can implement according to this after consulting this manual to make those of ordinary skill in the art.
As shown in Figure 1, a kind of tunnel excavation temporary support system, comprising:
Barrel steelframe 1, it is supported in tunnel internal, forms the arching system supporting tunnel inner wall;
Junction steel plate 5, it is arranged at both sides relative bottom described barrel steelframe 1, and described junction steel plate 5 is provided with connector 4, and described connector 4 is by steel plate around the rectangular channel formed, and is provided with spring in described rectangular channel;
Stull steelframe 2, it is the length-adjustable stull constituted by an active connection by two or more girder steels, the two ends of described stull steelframe 2 by being flexibly connected with described barrel steelframe 1 in the rectangular channel of the described connector 4 of wedging, and are combined to form closed ring supporting mechanism with described barrel steelframe 1; And the two ends of described stull steelframe 2 are supported mutually with described spring respectively.
The rectangular channel of described connector 4 arranges and makes stull steelframe 2 two ends be realized conveniently by the mode in wedging connector 4 and barrel steelframe 1, be firmly connected, and the spring of inside can produce certain tension force, improve the support degree of stull steelframe 2 pairs of barrel steelframes, make up rigidly connected deficiency, and certain length adjustment effect is played to stull steelframe 2.
In described tunnel excavation temporary support system, described connector 4 is by fastening bolt or be weldingly fixed on described junction steel plate 5; Described junction steel plate 5 is also fixed on described barrel steelframe 1 by the mode of fastening bolt or welding.
In described tunnel excavation temporary support system, the position that the two ends of described stull steelframe 2 are corresponding with on described connector 4 is provided with pin-and-hole; Also be provided with steady pin, described stull steelframe and described connector 4 are connected and fixed through described pin-and-hole by described steady pin.After the two ends wedging connector 4 of stull steelframe 2, by steady pin through pin-and-hole, stull steelframe 2 is fixed in the rectangular recess of connector 4.When needing dismounting, steady pin is taken out, and stull steelframe 2 is extracted in connector 4.
In described tunnel excavation temporary support system, movable connection method between described girder steel is: described girder steel is provided with the screw laterally running through described girder steel every 20-50cm, and being provided with the bolt matched with described screw, adjacent girder steel coordinates pivot joint by described bolt and screw.By the screw by multiple girder steels of formation stull steelframe 2 being arranged certain intervals distance, connection and the dismounting of adjacent two girder steels is realized by bolt, Rewelding is avoided to cause damage with cutting to stull steelframe 2, and the convenient length regulating stull steelframe 2 can be needed according to construction, improve its applicability.When stull steelframe 2 is installed, the two ends of stull steelframe 2 are headed in described connector 4, by the relative screw alignment on adjacent girder steel, girder steel is made to connect for the length consistent with span bottom barrel steelframe 1, and by bolt, adjacent girder steel is fixed, formed and the stull steelframe 2 that effectively supports is carried out to barrel steelframe 1, and due to the tension force effect of connector 4 inner spring, the effect of fine setting can be played stull steelframe 2, improve support effect.
In described tunnel excavation temporary support system, described girder steel is lightweight I-beam, and longitudinally every 2 Pin arrange a place.
In described tunnel excavation temporary support system, also comprise diagonal brace 3, first end and the described stull steelframe 2 of described diagonal brace 3 are connected and fixed, certain position place on second end of described diagonal brace 3 and described barrel steelframe 1 is connected and fixed, form the triangular support mechanism be supported in described closed ring supporting mechanism, greatly can increase the structural stability of temporary support system
In described tunnel excavation temporary support system, the quantity of described diagonal brace 3 is at least two, and the first end of diagonal brace 3 can be separately positioned in the middle part of stull steelframe 2 or close to the position at two ends, to form multiple triangular support mechanism.Angle between described diagonal brace 3 and described stull steelframe 2 is set to 45-75 degree, can regulate this angle according to actual needs.
Concrete construction method is:
General V level country rock many employings three step seven step excavating load, three step false stull fados are used for earthing and are less than 12 meters, fault belt and texture stratum V level country rock section.Ensure during three step false stull method excavation constructions that each length of bench controls at about 2 ~ 3 meters; Shoulder height is determined according to geological condition, tunnel cross-section size and construction equipment, and wherein top bar highly easy to control at about 3 meters, middle step is easy to control at about 4.3 meters.
Top bar and when performing steel arch-shelf, temporary support system is installed and supports, adopt arch springing place to perform the measures such as lock pin anchor tube, deformation controlling for rock surrounding gateways and preliminary bracing form simultaneously; Middle step excavates when sprayed concrete strength of topping bar reaches 70%, excavation removes false stull steelframe 2 of topping bar simultaneously, add middle step false stull steelframe 2 in time, make it again to close into ring, note performing of the deformation-control measures such as lock pin anchor tube simultaneously, dismounting top bar false stull time note trying not destroying false stull i iron, so that following cycle uses; Get out of a predicament or an embarrassing situation when middle step sprayed concrete strength reaches more than 70% excavate.Upper bench excavation is successively after super previous circulation, and upper, middle and lower step can excavate simultaneously.
Although embodiment of the present utility model is open as above, but it is not restricted to listed in manual and embodiment utilization, it can be applied to various applicable field of the present utility model completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the utility model is not limited to specific details and illustrates here and the legend described.
Claims (7)
1. a tunnel excavation temporary support system, is characterized in that, comprising:
Barrel steelframe, it is supported in tunnel internal, forms the arching system supporting tunnel inner wall;
Junction steel plate, it is arranged at both sides relative bottom described barrel steelframe, and described junction steel plate is provided with connector, and described connector is by steel plate around the rectangular channel formed, and is provided with spring in described rectangular channel;
Stull steelframe, it is the length-adjustable stull constituted by an active connection by two or more girder steels, the two ends of described stull steelframe by being flexibly connected with described barrel steelframe in the rectangular channel of the described connector of wedging, and are combined to form closed ring supporting mechanism with described barrel steelframe; And the two ends of described stull steelframe are supported mutually with described spring respectively.
2. tunnel excavation temporary support system as claimed in claim 1, it is characterized in that, described connector is by fastening bolt or be weldingly fixed on described junction steel plate;
Described junction steel plate is also fixed on described barrel steelframe by the mode of fastening bolt or welding.
3. tunnel excavation temporary support system as claimed in claim 2, it is characterized in that, the position that the two ends of described stull steelframe are corresponding with on described connector is provided with pin-and-hole; Also be provided with steady pin, described stull steelframe and described connector are connected and fixed through described pin-and-hole by described steady pin.
4. tunnel excavation temporary support system as claimed in claim 1, it is characterized in that, movable connection method between described girder steel is: described girder steel is provided with the screw laterally running through described girder steel every 20-50cm, and being provided with the bolt matched with described screw, adjacent girder steel coordinates pivot joint by described bolt and screw.
5. tunnel excavation temporary support system as claimed in claim 4, it is characterized in that, described girder steel is lightweight I-beam.
6. tunnel excavation temporary support system as claimed in claim 1, it is characterized in that, also comprise diagonal brace, first end and the described stull steelframe of described diagonal brace are connected and fixed, certain position place on second end of described diagonal brace and described barrel steelframe is connected and fixed, and forms the triangular support mechanism be supported in described closed ring supporting mechanism.
7. tunnel excavation temporary support system as claimed in claim 6, it is characterized in that, the quantity of described diagonal brace is at least two; Angle between described diagonal brace and described stull steelframe is set to 45-75 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520055136.2U CN204492852U (en) | 2015-01-27 | 2015-01-27 | A kind of tunnel excavation temporary support system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520055136.2U CN204492852U (en) | 2015-01-27 | 2015-01-27 | A kind of tunnel excavation temporary support system |
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| CN204492852U true CN204492852U (en) | 2015-07-22 |
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| CN201520055136.2U Expired - Fee Related CN204492852U (en) | 2015-01-27 | 2015-01-27 | A kind of tunnel excavation temporary support system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191203A (en) * | 2017-04-05 | 2017-09-22 | 中铁二十二局哈尔滨铁路建设集团有限责任公司 | It is a kind of it is adjustable control tunnel surrounding convergent deformation false stull device and apply method |
| CN108915728A (en) * | 2018-07-10 | 2018-11-30 | 中铁二十局集团有限公司 | Tunnel arch wall preliminary bracing based on gantry type support invades limit and changes arch construction method |
| CN112901208A (en) * | 2021-05-06 | 2021-06-04 | 中铁九局集团第七工程有限公司 | Comprehensive construction method for shallow buried section of urban railway mining method tunnel |
| CN114412509A (en) * | 2021-12-18 | 2022-04-29 | 中铁十五局集团第三工程有限公司 | Support method suitable for large deformation of mudstone tunnel |
-
2015
- 2015-01-27 CN CN201520055136.2U patent/CN204492852U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191203A (en) * | 2017-04-05 | 2017-09-22 | 中铁二十二局哈尔滨铁路建设集团有限责任公司 | It is a kind of it is adjustable control tunnel surrounding convergent deformation false stull device and apply method |
| CN107191203B (en) * | 2017-04-05 | 2023-11-28 | 中铁二十二局集团第一工程有限公司 | Temporary transverse strut device capable of adjustably controlling tunnel surrounding rock convergence deformation and construction method |
| CN108915728A (en) * | 2018-07-10 | 2018-11-30 | 中铁二十局集团有限公司 | Tunnel arch wall preliminary bracing based on gantry type support invades limit and changes arch construction method |
| CN108915728B (en) * | 2018-07-10 | 2019-08-20 | 中铁二十局集团有限公司 | Tunnel arch wall preliminary bracing based on gantry type support invades limit and changes arch construction method |
| CN112901208A (en) * | 2021-05-06 | 2021-06-04 | 中铁九局集团第七工程有限公司 | Comprehensive construction method for shallow buried section of urban railway mining method tunnel |
| CN114412509A (en) * | 2021-12-18 | 2022-04-29 | 中铁十五局集团第三工程有限公司 | Support method suitable for large deformation of mudstone tunnel |
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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: 20150722 Termination date: 20190127 |
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| CF01 | Termination of patent right due to non-payment of annual fee |