CN207268177U - A kind of extruding trolley of the first branch bearing capacity in tunnel - Google Patents
A kind of extruding trolley of the first branch bearing capacity in tunnel Download PDFInfo
- Publication number
- CN207268177U CN207268177U CN201721046980.4U CN201721046980U CN207268177U CN 207268177 U CN207268177 U CN 207268177U CN 201721046980 U CN201721046980 U CN 201721046980U CN 207268177 U CN207268177 U CN 207268177U
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- China
- Prior art keywords
- trolley
- extruding
- branch
- tunnel
- steel
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- Expired - Fee Related
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- Lining And Supports For Tunnels (AREA)
Abstract
A kind of extruding trolley of the first branch bearing capacity in tunnel belongs to constructing tunnel field.Extruding trolley includes：More vertical H profile steels (6) are welded on trolley, traverse transverse direction H profile steel (5) in vertical H profile steel, 4 jack (4) is positioned in horizontal H profile steel (5), jack (4) top surface withstands steel jacking (3), and rubber pad (2) is lined between steel jacking and first branch face.Each component of trolley, which will be extruded, using gantry crane is hung to underground；Each component of trolley will be extruded and be transported to pilot tunnel test section；Lay railway sleepers and rail in pilot tunnel inverted arch, each parts assembly shaping of trolley will be extruded；Squeeze test is carried out to vault, extruding force adds jack to realize by steel jacking；Extrude trolley dismounting, transport.Extruding trolley is intended to the stressing conditions of the lining assembling machine support boots of simulation two, when grasping using two lining assembling machines progress tunnel double-linings assembly, whether the extruding force that first branch structure is subject to meets needs of constructing, while understands the stress deformation situation of just branch, so as to the construction of follow-up two lining assembling machines.
Description
Technical field
First branch bearing capacity is required when the utility model belongs to constructing tunnel, it is to be understood that used during first branch stressing conditions
A kind of instrument.
Background technology
With the rapidly propulsion of Urbanization in China, urban population sharp increase, in inner city, the population of work is high
Degree is concentrated, and city is slept in the outer suburbs generally as the auxiliary of inner city, this results in the trip requirements for a large amount of long ranges occur.Cause
The top priority of this China's urban transportation is to construct metropolitan integrative traffic system, and subway be future city railway and highway system can not or
Scarce part, two lining construction usage assembly trolleys are more efficient, the duration is shorter, construction cost is lower.
The assembled trolley needs of two linings are horizontal to two bushing pipe pieces at the same time using supportting stretcher for boot and shoe in first branch and applying vertical pretightning force
Extruding force is provided to ensure that the section of jurisdiction of adjacent ring is closely connected, reaches waterproof requirement.But vertical pretightning force is excessive may cause just to prop up
Destruction, pretightning force is too small, can not provide enough extruding forces.Therefore need in advance to test first branch bearing capacity, find
Most suitable parameter.
The content of the invention
To solve the above-mentioned problems, the purpose of this utility model is to provide one kind to test first branch bearing capacity
Construction equipment.
The extruding trolley of the first branch bearing capacity in a kind of tunnel, it is characterised in that more vertical H profile steels, vertical H are welded on trolley
Traverse transverse direction H profile steel on shaped steel, 4 jack are positioned in horizontal H profile steel, and jack top surface withstands steel jacking, steel jacking with
Rubber pad is lined between first branch face.
Using the test method of branch bearing capacity at the beginning of the tunnel of the extruding trolley, it is characterised in that comprise the following steps：
1) each component of trolley will be extruded using gantry crane and be hung to underground；
2) each component of trolley will be extruded and be transported to pilot tunnel test section；
3) lay railway sleepers and rail in pilot tunnel inverted arch, each parts assembly shaping of trolley will be extruded；
4) squeeze test is carried out to vault, extruding force adds jack to realize by steel jacking；
5) trolley dismounting, transport are extruded.
Brief description of the drawings
Fig. 1 is extruding trolley structure elevation.
Fig. 2 is extruding trolley structure profile.
Fig. 3 is extruding trolley structure top view.
The meaning of digital representation in figure：
1st, first branch face
2nd, rubber pad
3rd, steel jacking
4th, jack
5th, horizontal H profile steel
6th, vertical H profile steel
7th, trolley
8th, rail
9th, sleeper
Embodiment
Branch bearing capacity test instrument at the beginning of tunnel provided by the utility model is carried out with specific embodiment below in conjunction with the accompanying drawings
Explanation.
Now illustrated by taking certain engineering test as an example：The test site is located in certain subway pioneer bore, it is contemplated that tunnel
First branch vault is behind there may be gap and the mixed leakiness situation of spray, therefore carried out for this most unfavorable combination using trolley is extruded
Squeeze test：
1) vault absolute altitude initial value is measured；
2) in-site installation extruding trolley：Trolley each several part component, hydraulic oil pump will be extruded with electric three-wheel and other are supporting
Facility is transported to work surface, and sleeper 9 and rail 8 are laid with pilot tunnel inverted arch, by extruding trolley each several part component assembly shaping, trolley 7
It is placed on rail 8；8 vertical H profile steels 6 are welded on trolley, 5,4 jack 4 of traverse transverse direction H profile steel are placed in vertical H profile steel
In in horizontal H profile steel 5,4 top surface of jack withstands steel jacking 3, and rubber pad 2 is padded between steel jacking (support boots) and first branch face, avoids damaging
Bad just branch face 1.
3) installation is complete for extruding trolley, after being placed into specified testing position, uniformly applies pressure to 4 jack 4 of trolley
Power, so that rubber pad 2 and first branch face 1 are closely connected above support boots, oil pump initial press 5MPa, and stablize 2min, measure vault absolute altitude
Shift value；
4) jack point level Four loads every grade and is loaded onto stable oil pressure 2min after design load, and measures vault absolute altitude position step by step
Shifting value, observes first branch face due to abnormal (deformation or crack) step by step；
5) hierarchical loading design load such as following table：
6) squeeze test is carried out to the first branch vault of diverse location, and has obtained corresponding just branch deformation data.
Squeeze test has been carried out to the first branch vault of 2 diverse locations, and has obtained corresponding just branch deformation data.From examination
Testing in result can obtain to draw a conclusion：
1) just branch vault maximum distortion under the load for bearing 138t is 8mm to small pilot tunnel, is deformed in allowed band, far away
Reach structural failure degree；
2) the small pilot tunnel support boots that just branch vault converts under the load for bearing 138t are 0.55MPa to the pressure in first branch face,
Consider just branch face irregularity, support boots cannot be completely closely connected with first branch face, and local pressure can be slightly larger than 0.55MPa；
3) just locally there is stone peeling phenomenon in branch face during hierarchical loading, and predominantly just branch face is uneven for analysis reason
It is suitable locally to have gap with support boots, cause load gradually increase during just branch surface stone be extruded peeling, can determine that institute's loading
Carry smaller on the influence of first branch structure.
Claims (1)
1. the extruding trolley of the first branch bearing capacity in a kind of tunnel, it is characterised in that more vertical H profile steels (6) are welded on trolley, vertically
Traverse transverse direction H profile steel (5) in H profile steel, 4 jack (4) are positioned in horizontal H profile steel (5), and jack (4) top surface withstands steel
Jacking (3), is lined with rubber pad (2) between steel jacking and first branch face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721046980.4U CN207268177U (en) | 2017-08-21 | 2017-08-21 | A kind of extruding trolley of the first branch bearing capacity in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721046980.4U CN207268177U (en) | 2017-08-21 | 2017-08-21 | A kind of extruding trolley of the first branch bearing capacity in tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207268177U true CN207268177U (en) | 2018-04-24 |
Family
ID=61960287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721046980.4U Expired - Fee Related CN207268177U (en) | 2017-08-21 | 2017-08-21 | A kind of extruding trolley of the first branch bearing capacity in tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207268177U (en) |
-
2017
- 2017-08-21 CN CN201721046980.4U patent/CN207268177U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180424 |