CN201810324U - Steel frame for supporting and protecting lower part of middle separation wall in early tunnel period - Google Patents
Steel frame for supporting and protecting lower part of middle separation wall in early tunnel period Download PDFInfo
- Publication number
- CN201810324U CN201810324U CN2010205706723U CN201020570672U CN201810324U CN 201810324 U CN201810324 U CN 201810324U CN 2010205706723 U CN2010205706723 U CN 2010205706723U CN 201020570672 U CN201020570672 U CN 201020570672U CN 201810324 U CN201810324 U CN 201810324U
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- steel frame
- tunnel
- supporting
- steelframe
- separation wall
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Abstract
The utility model discloses a steel frame for supporting and protecting the lower part of a middle separation wall in the early tunnel period, which relates to the steel frame used for primary support and protection in the tunnel digging process. The utility model solves the problems that the existing sectional steel (grid) steel frame at the lower part of the middle separation wall is in an integral type, so the integrity of the tunnel support and protection structure can be damaged during the removal, and the design is unfavorable for the stability of tunnel wall rocks. The steel frame for supporting and protecting the lower part of the middle separation wall in the early tunnel period comprises a steel frame A and a steel frame B, wherein one end of the steel frame A and one end of the steel frame B are fixed to a connecting plate, and screw holes are drilled in corresponding positions of the connecting plate. The steel frame adopts two sections of steel frames for supporting and protecting the lower part of the middle separation wall, is convenient to use, can not damage the integrity of the tunnel support and protection structure when being removed, saves raw materials, reduces the construction cost, has simple structure and is easy to be popularized.
Description
Technical field
The utility model relates to the steelframe that preliminary bracing is used in the tunnel excavation process, is specifically related to a kind of steelframe that is used for preliminary bracing median septum bottom, tunnel.
Background technology
In the constructing tunnel process because of aspect reasons such as geological conditions, construction level, control requirements, employing such as one-sided wall pilot tunnel method, mid-board method, the excavation methods such as mid-board method, double side wall pilot tunnel method that intersect, in these excavation methods, need the whole section in tunnel is carried out partial excavation, need in time to carry out preliminary bracing in the digging process, control surrouding rock deformation guarantees construction safety.Need in the supporting to use shaped steel (grid) steelframe to carry out the supporting at mid-board position, before secondary lining, need shaped steel (grid) supporting of mid-board bottom is removed, with the construction of operations such as convenient-laying splash guard.The supporting quality of preliminary bracing mid-board and appropriate dismounting time to sedimentation in the control hole, guarantee that safety for tunnel engineering plays an important role, therefore must guarantee the supporting effect of mid-board supporting shaped steel (grid) steelframe and suitable dismounting time, with quick joining and the in-cavity construction safety of guaranteeing working procedure.
After the tunnel adopts mid-board shaped steel (grid) to carry out preliminary bracing, before the inverted arch concrete of construction bottom, need to remove shaped steel (grid) steelframe of median septum, because existing shaped steel (grid) steelframe is all-in-one-piece, remove the method that adopts and mainly contain following two kinds, first method is shaped steel (grid) supporting of removing the mid-board bottom before the inverted arch concrete of construction bottom, makes top be in vacant state for a long time; Second method is that the steelframe of mid-board bottom is not removed in the inverted arch concrete construction, and the bottom steelframe is embedded in the inverted arch concrete, by the time cut off dismounting before applying two lining splash guards.Wherein first method has been destroyed the globality of tunnel support structure owing to remove median septum too early, is unfavorable for the stable and Deformation control of tunnel surrounding, increases the construction control difficulty, is unfavorable for safe construction; Second method is that the main oxy arc that adopts cuts the bottom steelframe in work progress, in cutting process, relate to the safe storage of oxygen and acetylene gas and the safe construction of cutting operation, secondly, carrying out cutting work in the tunnel causes construction to disturb easily, tie up the construction operation place, operating condition is poor, moreover the shaped steel after the cutting (grid) can not be used for the supporting of median septum bottom once more, cause raw-material waste, increased construction cost.
Summary of the invention
The utility model is in order to solve because existing median septum bottom shaped steel (grid) steelframe is all-in-one-piece, make the globality that when removing, can destroy tunnel support structure, be unfavorable for the stable and Deformation control of tunnel surrounding, perhaps adopt and cause raw-material waste in the cutting method demolishing process, increased the problem of construction cost, and a kind of steelframe that is used for preliminary bracing median septum bottom, tunnel is provided.
The utility model is achieved through the following technical solutions:
A kind of steelframe that is used for preliminary bracing median septum bottom, tunnel comprises steelframe A and steelframe B, and the end of steelframe A and steelframe B is fixed with junction plate, and the correspondence position of junction plate is drilled with bolt hole.During use, real size according to the tunnel, on ground steelframe A and steelframe B are processed as suitable length, wherein steelframe A length is by the partial excavation height is definite down, steelframe B length is determined according to inverted arch concrete design thickness in the work progress, be transported in the tunnel after machining, adopt bolt firmly to connect two joint steelframes, before building the inverted arch concrete, do not need to remove bottom sections steelframe, can directly imbed in the concrete, the two lining splash guards of waiting to construct are directly removed two steelframes of median septum bottom from bolt backing plate junction before, reclaim the top steelframe simultaneously and recycle.
The utility model adopts two joint steelframes that supporting is carried out in the median septum bottom, and is easy to use, can not destroy the globality of tunnel support structure during dismounting, saves raw material, reduced construction cost, simple in structure, is easy to promote.
Description of drawings
Fig. 1 is a kind of structural representation that is used for the steelframe of preliminary bracing median septum bottom, tunnel of the utility model;
Fig. 2 is for adopting the structural representation of the utility model supporting;
Among the figure: 1-steelframe A, 2-steelframe B, 3-junction plate, 4-inverted arch concrete, the preliminary bracing of 5-inverted arch, 6-bolt hole.
The specific embodiment
As described in Fig. 1,2, a kind of steelframe that is used for preliminary bracing median septum bottom, tunnel comprises steelframe A1 and steelframe B2, and the end of steelframe A and steelframe B is fixed with junction plate 3, and the correspondence position of junction plate is drilled with bolt hole 6.
During installation, the bottom of inverted arch concrete 4 is done inverted arch preliminary bracing 5 earlier, and the length of steelframe B2 is the thickness of inverted arch concrete 4, and the length of steelframe A1 is following partial excavation height.
Claims (1)
1. a steelframe that is used for preliminary bracing median septum bottom, tunnel is characterized in that comprising steelframe A(1) and steelframe B(2), the end of steelframe A and steelframe B is fixed with junction plate (3), and the correspondence position of junction plate is drilled with bolt hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205706723U CN201810324U (en) | 2010-10-21 | 2010-10-21 | Steel frame for supporting and protecting lower part of middle separation wall in early tunnel period |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205706723U CN201810324U (en) | 2010-10-21 | 2010-10-21 | Steel frame for supporting and protecting lower part of middle separation wall in early tunnel period |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810324U true CN201810324U (en) | 2011-04-27 |
Family
ID=43893267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205706723U Expired - Lifetime CN201810324U (en) | 2010-10-21 | 2010-10-21 | Steel frame for supporting and protecting lower part of middle separation wall in early tunnel period |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201810324U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134250A (en) * | 2015-10-16 | 2015-12-09 | 中铁十局集团济南铁路工程有限公司 | Support disassembly-free and direct lining method for weak surrounding rock subway station |
| CN106351674A (en) * | 2016-11-04 | 2017-01-25 | 长安大学 | Composite lock pin member of tunnel steel frame and stress analysis method of composite lock pin member |
| CN106401617A (en) * | 2016-09-12 | 2017-02-15 | 中铁十九局集团第七工程有限公司 | Steel arch and joint thereof |
-
2010
- 2010-10-21 CN CN2010205706723U patent/CN201810324U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134250A (en) * | 2015-10-16 | 2015-12-09 | 中铁十局集团济南铁路工程有限公司 | Support disassembly-free and direct lining method for weak surrounding rock subway station |
| CN106401617A (en) * | 2016-09-12 | 2017-02-15 | 中铁十九局集团第七工程有限公司 | Steel arch and joint thereof |
| CN106351674A (en) * | 2016-11-04 | 2017-01-25 | 长安大学 | Composite lock pin member of tunnel steel frame and stress analysis method of composite lock pin member |
| CN106351674B (en) * | 2016-11-04 | 2019-03-22 | 长安大学 | A kind of the composite lock foot component and its force analysis method of tunnel steelframe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |
|
| CX01 | Expiry of patent term |