CN207919567U - High roadbed tunnel off-load safeguard structure - Google Patents
High roadbed tunnel off-load safeguard structure Download PDFInfo
- Publication number
- CN207919567U CN207919567U CN201820235849.0U CN201820235849U CN207919567U CN 207919567 U CN207919567 U CN 207919567U CN 201820235849 U CN201820235849 U CN 201820235849U CN 207919567 U CN207919567 U CN 207919567U
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- CN
- China
- Prior art keywords
- tunnel
- backfill
- load
- cast
- shield arch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 239000002689 soil Substances 0.000 claims abstract description 31
- 239000011381 foam concrete Substances 0.000 claims abstract description 18
- 238000007596 consolidation process Methods 0.000 claims abstract description 17
- 238000011065 in-situ storage Methods 0.000 claims abstract description 16
- 239000004575 stone Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 17
- 239000011435 rock Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 2
- 239000004567 concrete Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Abstract
The utility model provides a kind of high roadbed tunnel off-load safeguard structure, including tunnel, the original backfill soil body；Further include cast-in-situ bored pile, shield arch, top beam, cross-tie and soil mass consolidation；Soil mass consolidation is arranged in the left and right side of tunnel periphery, uniformly distributed multiple cast-in-situ bored piles on the inside of length of tunnel direction, soil mass consolidation, top beam is respectively set at the top of left and right side cast-in-situ bored pile, cross-tie is arranged between left and right side top beam and position corresponding with cast-in-situ bored pile, the upper end setting shield arch of top beam, shield arch are filled with light foam concrete between the original backfill soil body below；It protects dome portions and is filled with top light foam concrete；Extend above soil mass consolidation and outward and is equipped with backfill stone.The utility model is mainly used in the secondary backfill for having the original backfill layer of cut-and-cover tunnel or more, the structural defence existing tunnel that it is combined using bored concrete pile with shield arch structure, undertakes top backfill load.
Description
Technical field
The utility model belongs to Tunnel Engineering and underground engineering technical field, specifically a kind of high roadbed tunnel off-load
Safeguard structure.
Background technology
In terms of related high roadbed tunnel off-load Study on Measures：It is embedded at abroad, centrifugal model test has been used to have studied
Flexible filler in sand is to the off-load effect of box culvert, and result of study shows the effect due to flexible filler so that hanging down on box culvert
Vertical compression power reduces, and the arching principle above box culvert is additionally proved by means of photoelastic test means.Secondly polystyrene is utilized
Off-load and long-term behaviour of the block as rigid culvert under the different embankments of off-load investigation of materials pass through long-term observation, observation knot
Fruit shows that the vertical earth pressure for acting on culvert is substantially reduced.The reducing pressure that the country has been studied is predominantly by certain in culvert
Compressibility is laid in range to be much larger than the material to banket and give full play to the arching to banket by constructing certain " off-loading bridge "
To reduce the vertical earth pressure for containing top.It is studied also mostly using scale-model investigation as foundation, obtains semiempirical formula, has certain office
It is sex-limited.Wang Xiaomou, Gu Anquan et al. have studied related positive buried pipe vertical earth pressure reducing pressure, which is with indoor mould
Type experiment is background, using the flexible material of polystyrene foam plastics as off-load material, has studied flexible material and is banketing
Under gravity, by deforming corrective action to stress, obtained the thickness of off-loading effect and flexible filler, deformation modulus,
The depth of fill changes and pipeline protrudes the relationship between the variation of the factors such as the height on ground, while also having obtained under reducing pressure
The laboratory tests achievement such as computational methods of pipeline vertical earth pressure.Secondly, solidification method around cavern by wrapping a stiffness layer
The soil pressure load that larger curing materials make script be undertaken by cavern's system is married again to be undertaken to cured layer, reduces hole to realize
The target of soil pressure at the top of cell structure.The studies above is primarily present problems with：
1, various off-load measures mostly only from consider tunnel structure itself can bearing load consider, upper load is applied
Since setting of ground causes bulk settling deformation in tunnel not fully consider under adding；
2, more clear using the plasticity Sand-gravel-cushion Technioue off-load mechanism of flexible material etc., problem be for ductile bed thickness,
The calculating of compression modulus, the control of bed course settling amount are difficult to hold, therefore lack operability in practice in engineering；Secondly for
The limited durability of flexible material, important communication project service life are all 100 years, and flexible material failure may be caused to lower part
The destruction of tunnel structure；
3, the off-load principle of solidification method is to banket stiffness by itself based on raising cavern's structure periphery to reach off-load purpose
Method, main problem existing for this method is that work progress is more complicated, and solidification range is difficult to accurate determination, while it can have
Effect off-load act on Mass Near The Top of Underground Cavity capacity value number be difficult to calculate；Therefore it certainly will also bring along and can not grasp in design and construction
The property made problem.
Invention content
In order to overcome above-mentioned problems of the prior art, the purpose of this utility model to be to provide a kind of high roadbed tunnel
Off-load safeguard structure, mainly solves that existing high roadbed tunnel off-load measure structure load stress is indefinite, can lead to tunnel structure
Integral sinking, off-load materials ' durability cannot be met the requirements and the problems such as engineering exploitativeness difference.
Technical solution is as follows used by the utility model realizes above-mentioned purpose：A kind of high roadbed tunnel off-load protection knot
Structure, including existing tunnel and its original backfill soil body of tunnel periphery；It is characterized in that：Further include cast-in-situ bored pile, shield arch, top
Longeron, cross-tie and soil mass consolidation；Soil mass consolidation is arranged in the left and right side of tunnel periphery, along length of tunnel direction, soil mass consolidation
Inside（It is bordering on the side at tunnel center, it is the same below）Uniformly distributed multiple cast-in-situ bored piles, left and right side cast-in-situ bored pile top part
Top beam is not set, between left and right side top beam and position corresponding with cast-in-situ bored pile is arranged cross-tie, top beam it is upper
End setting shield arch, shield arch are filled with light foam concrete between the original backfill soil body below；It protects dome portions and is filled with top
Light foam concrete；Extend above soil mass consolidation and outward and is equipped with backfill stone.
In order to prevent after shield arch stress deformation, additional load is generated to lower section tunnel, shield arch inner surface and light foam are mixed
Deformation space is reserved between solidifying soil, deformation space is filled with flexible materials such as polyurethane.
To reinforce tunnel water proofing, the first rigid water-permeable pipe is set along tunnel cross sectional inside backfill stone, it is light at top
The second rigid water-permeable pipe, the first rigid water-permeable pipe and the second rigid water-permeable pipe are set along tunnel cross sectional inside matter foam concrete
Connection.
Watertight insulation is set in top light foam concrete upper surface and backfill stone upper surface, and certain slope is set
Degree is drained.
High roadbed off-load in tunnel provided by the utility model is mainly used for having the two of the original backfill layer of cut-and-cover tunnel or more
In secondary backfill, be suitable for the tunnels such as railway, highway, subway, municipal administration, metallurgy, coal, water power, water conservancy, people's air defense, national defence, tunnel,
The subterranean tunnels application such as tunnel.The utility model protects existing tunnel using bored concrete pile with the structure type that shield arch structure is combined
Road undertakes top backfill load.The setting shield arch i.e. at existing backfill absolute altitude, shield arch pass follow-up filled load by top beam
Pile foundation is passed, to reach high roadbed backfill, the purpose of protection lower section existing tunnel.The utility model advantageous effect is mainly：
1, any load is not increased to existing tunnel, increased fractional load can be set according to the lower depth for digging foundation pit
It changes；Tunnel structure load-bearing will not be caused to sink；
2, bored concrete pile+shield arch formula structure stress is clear, securely and reliably；
3, the normal use of existing tunnel is not interfered with, ensures Business Line normal operation；
4, the structure size that can adjust shield arch and stake meets different height backfill requirement；
5, light foam concrete has the characteristics that unit weight is small, durability is high, good from close property；
6, easy construction, period are shorter.
Description of the drawings
Fig. 1 is the structural schematic diagram in the utility model cross section；
Fig. 2 is the planar structure schematic diagram of the utility model；
Fig. 3 is A-A sectional views of Fig. 1.
In figure：1-existing tunnel, 2-excavation slope lines, the 3-original backfill soil bodys, 4-original backfill top surfaces, 5-is former
Beginning excavation line, 6-present situation ground side slopes, 7-soil mass consolidations, 8-cast-in-situ bored piles, 9-top beams, 10-cross-ties,
11-shield arches, 12-light gauge foam concrete, 13-flexible materials, 14-backfill rock structures, 15-backfill lines of demarcation, 16-
First rigid water-permeable pipe, 17-watertight insulations, 18-top light foam concretes, the 19-the second rigid water-permeable pipe, i%-
The gradient.
Specific implementation mode
Tunnel high roadbed off-load is usually used in the secondary backfill for having the original backfill layer of cut-and-cover tunnel or more, common tunnel
Open cut tunnel excavates and back-filling way is referring to Fig. 1, and from tunnel both sides along 5 excavation pit of original excavation line, progress tunnel is applied in foundation pit
Work waits for that constructing tunnel is completed, and carries out original backfill on it and constitutes the original backfill soil body 3, is backfilled to original backfill top surface 4.It is former
The two side brush slope lines for beginning to backfill 4 or more top surface are present situation ground side slope 6.Below in conjunction with attached drawing to skill provided by the utility model
Art scheme is further described.
As shown in Figure 1, Figure 2 as shown in figure 3：A kind of high roadbed tunnel off-load safeguard structure, including outside existing tunnel 1 and its tunnel
The original backfill soil body 3 enclosed；Further include cast-in-situ bored pile 8, shield arch 11, top beam 9, cross-tie 10 and soil mass consolidation 7；Tunnel
Soil mass consolidation 7 is arranged in the left and right side of 1 periphery, along 1 length direction of tunnel, the 7 uniformly distributed multiple drill-pourings in inside of soil mass consolidation
Stake 8, the top of left and right side cast-in-situ bored pile 8 are respectively set top beam 9, between left and right side top beam 9 and right with cast-in-situ bored pile 8
The position setting cross-tie 10 answered, the upper end setting shield arch 11 of top beam 9, shield arch 11 is below between the original backfill soil body 3
Filled with light foam concrete 12；11 top of shield arch is filled with top light foam concrete 18；Soil mass consolidation 7 above and to
Outside, which extends, is equipped with backfill rock structure 14.
Deformation space is reserved between shield 11 inner surfaces of arch and light foam concrete 12, deformation space fills flexible material
Material 13, flexible material 13 is polyurethane etc.；After preventing shield arch stress deformation, additional load is generated to lower section tunnel.
To reinforce tunnel water proofing, the first rigid water-permeable pipe 16 is set along tunnel cross sectional inside backfill rock structure 14,
The second rigid water-permeable pipe 19 is set along tunnel cross sectional inside top light foam concrete 18, the first rigid water-permeable pipe 16 with
Second rigid water-permeable pipe connection 19.
At top, watertight insulation 17 is arranged with 14 upper surface of backfill rock structure in 18 upper surface of light foam concrete, and
It is provided with to the inclined gradient i% in side and is drained；I is 1~3.
Claims (5)
1. a kind of high roadbed tunnel off-load safeguard structure, including existing tunnel and its original backfill soil body of tunnel periphery；It is special
Sign is：It further include cast-in-situ bored pile（8）, shield arch（11）, top beam（9）, cross-tie（10）With soil mass consolidation（7）；Tunnel
（1）Soil mass consolidation is arranged in the left and right side of periphery（7）, along tunnel（1）Length direction, soil mass consolidation（7）Inside is uniformly distributed multiple
Cast-in-situ bored pile（8）, left and right side cast-in-situ bored pile（8）Top beam is respectively set in top（9）, left and right side top beam（9）Between
And and cast-in-situ bored pile（8）Cross-tie is arranged in corresponding position（10）, top beam（9）Upper end setting shield arch（11）, shield arch
（11）Below with the original backfill soil body（3）Between be filled with light foam concrete（12）；Shield arch（11）Top is filled with top
Light foam concrete（18）；Soil mass consolidation（7）Extend above and outward and is equipped with backfill rock structure（14）.
2. a kind of high roadbed tunnel off-load safeguard structure as described in claim 1, it is characterised in that：Shield arch（11）Inner surface with
Light foam concrete（12）Between be reserved with deformation space, deformation space is filled with flexible material（13）.
3. a kind of high roadbed tunnel off-load safeguard structure as claimed in claim 2, it is characterised in that：Flexible material（13）It is poly-
Urethane.
4. a kind of high roadbed tunnel off-load safeguard structure as described in claims 1 to 3 any one, it is characterised in that：It is returning
Banket stone structure（14）The first rigid water-permeable pipe is arranged along tunnel cross sectional in inside（16）, in top light foam concrete（18）
The second rigid water-permeable pipe is arranged along tunnel cross sectional in inside（19）, the first rigid water-permeable pipe（16）Connect with the second rigid water-permeable pipe
It connects.
5. a kind of high roadbed tunnel off-load safeguard structure as claimed in claim 4, it is characterised in that：It is mixed in top light foam
Solidifying soil（18）Upper surface and backfill rock structure（14）Watertight insulation is arranged in upper surface（17）, and be provided with inclined to side
Gradient i%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820235849.0U CN207919567U (en) | 2018-02-09 | 2018-02-09 | High roadbed tunnel off-load safeguard structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820235849.0U CN207919567U (en) | 2018-02-09 | 2018-02-09 | High roadbed tunnel off-load safeguard structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207919567U true CN207919567U (en) | 2018-09-28 |
Family
ID=63600167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820235849.0U Withdrawn - After Issue CN207919567U (en) | 2018-02-09 | 2018-02-09 | High roadbed tunnel off-load safeguard structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207919567U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108560568A (en) * | 2018-02-09 | 2018-09-21 | 兰州交通大学 | A kind of high roadbed tunnel off-load safeguard structure and its construction method |
-
2018
- 2018-02-09 CN CN201820235849.0U patent/CN207919567U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108560568A (en) * | 2018-02-09 | 2018-09-21 | 兰州交通大学 | A kind of high roadbed tunnel off-load safeguard structure and its construction method |
| CN108560568B (en) * | 2018-02-09 | 2023-11-21 | 兰州交通大学 | High-fill tunnel load shedding protection structure and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180928 Effective date of abandoning: 20231121 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180928 Effective date of abandoning: 20231121 |