CN202402040U - Large-volume hollow-concrete tunnel lining structure - Google Patents
Large-volume hollow-concrete tunnel lining structure Download PDFInfo
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- CN202402040U CN202402040U CN2011205681152U CN201120568115U CN202402040U CN 202402040 U CN202402040 U CN 202402040U CN 2011205681152 U CN2011205681152 U CN 2011205681152U CN 201120568115 U CN201120568115 U CN 201120568115U CN 202402040 U CN202402040 U CN 202402040U
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Abstract
The utility model relates to a large-volume hollow-concrete tunnel lining structure which is capable of effectively reducing cracks generated by hydration heat of large-volume concrete, improving the impermeability and integrity of the structure, ensuring the construction quality and durability of an open cut tunnel structure, and greatly saving the lining masonry of the lining concrete so as to greatly reduce the construction cost. A concrete lining (10) comprises an arch ring section (11), a side wall section (12) and an inverted arch section (13), wherein the concrete lining (10) is internally provided with longitudinal holes (20) which are arranged at intervals along the circumference of the concrete lining (10) or is provided with ring holes(21) which are arranged at intervals along the longitudinal direction of the concrete lining (10).
Description
Technical field
The utility model relates to railway tunnel, particularly a kind of big volume hollow concrete tunnel lining structure.
Background technology
Tunnel lining structure has composite lining or the lining cutting of monolithic open cut tunnel at present; Double track tunnel composite lining structural thickness generally is not more than 60cm; Open cut tunnel liner structure thickness generally is not more than 80cm; Common lining design load is less, and especially open cut tunnel lining design load is generally less than 4m backfill load, and the liner structure pattern all adopts solid concrete or single solid steel reinforced concrete section.Nowadays along with stride greatly, the increasing at present of large cross-section tunnel construction, the tunnel lining design load constantly increases, and makes the tunnel lining tradition build technology and the theoretical problem that faces is more and more.
The domestic raising of in nearly ten years, also very always paying attention to tunnel open cut tunnel construction technique, but totally lag behind abroad, similar engineering difference aspect design and construction is bigger.For protecting general falling rocks, collapse, the current highway Tunnel Design standard clearly regulation open cut tunnel thickness that bankets is not less than 1.5m, does not do requirement but push up maximum backfill thickness for open cut tunnel lining cutting hole.The regulation and stipulation hole is pushed up the thickness that bankets and is not less than 1.5m, has only considered that liner structure can bear the limit, face upward caving on a small quantity of slope.When the limit, face upward the slope disease arranged, then should suitably increase hole top backfill thickness and structural thickness in the time of might taking place to cave in more greatly future, to guarantee the stable and safety of open cut tunnel.Excavate preceding original landforms for recovering the hole in the actual engineering, even increase thickness of earth covering to reach certain building or engineering demand at original landforms.The thickness that bankets is pushed up in the hole to be increased, and will certainly increase top, top, hole load, causes the open cut tunnel liner structure to produce than big internal force.Engineering experience shows that the thickness of open cut tunnel liner structure becomes the large volume concrete structural lining cutting often greater than 2m, in actual engineering, is difficult to carry out after the open cut tunnel top depth of fill is greater than 30m.Development along with the underground space; The bored tunnel span constantly breaks through; Especially need take into account land resources utilization, functional requirement at urban surface, the imposed load that tunnel lining structure will be born is also increasing, strides heavily loaded tunnel lining structure thickness thus greatly and increases thereupon.Tunnel concrete in mass lining cutting, thickness is big, the concrete coefficient of thermal conductivity is smaller, tends to cause thermal cracking, and the concrete in mass tunnel lining structure is difficult to satisfy safety of structure and life requirement.
China's design of common concrete proportioning regulation and stipulation, concrete in mass be meant more than the minimum cross section size 1m, the control temperature difference that its volume and size have reached that something must be done to, rationally solves thermal stresses and control the concrete structure of crack developing.Concrete in mass is thicker; And the concrete coefficient of thermal conductivity is smaller, so the heat of hydration of inside concrete is difficult for outwards distributing, and causes concrete internal temperature very high; And the outside heat of hydration of concrete outwards distributes easily, makes like this that concrete is inside and outside to be formed the temperature difference and produce thermal stresses.Inside concrete produces compressive stress, and concrete surface produces tensile stress, and when tensile stress surpassed the concrete ultimate tensile strength, concrete surface just produced the crack.None set pattern of moving towards of this thermal cracking is restrained, and the large tracts of land structural cracks is crisscross usually, and perfoliate often harmful crack is very unfavorable to impermeability, globality, durability even the supporting capacity of structure.Thus it is clear that,,, still can produce bigger internal force to the open cut tunnel lining cutting is inner inevitably even the open cut tunnel section is carried out global optimization when banketing when higher in open cut tunnel top.If increase lining thickness simply; Cause that the lining cutting deadweight increases, problems such as neutral axis place concrete waste had both caused a large amount of bricklaying wastes; Can produce big thermal cracking again because the concrete in mass heat of hydration can't effectively eliminate, cause open cut tunnel lining cutting durability to be protected.
Consider to practice thrift construction costs, reserve planned land use, reduce requirements such as runing risk, build railway in the mountainous region, receive the station setting requirement, often high backfill tunnel lining structure is striden in appearance greatly.The tunnel lining span develops into three-way, four threaded list roads by general single, double threaded list road at present; Even multiple track tunnel; Follow the continuous breakthrough of tunnel span; Tunnel open cut tunnel lining cutting backfill thickness and load guarantee that the tunnel lining structure thickness of structural safety constantly increases, even ultra thick liner structure more than the 2m occurs in continuous increase.Stride greatly, high backfill load open cut tunnel and stride greatly, the ultra mass concrete liner structure in the dark hole of super large imposed load is faced with new challenges and new technical barrier at aspects such as distortion, safety, durability, need to be resolved hurrily about design parameters such as large span concrete in mass liner structure form and construction technology problem.
The utility model content
The utility model technical problem to be solved provides a kind of big volume hollow concrete tunnel lining structure; Can reduce the crack that the concrete in mass heat of hydration is produced effectively; Improve structure impermeability, globality; Guarantee open cut tunnel Structural Engineering quality and durability, and can practice thrift lining concrete lining cutting bricklaying significantly, construction costs is greatly reduced.
It is following that the utility model solves the technical scheme that its technical problem adopted:
The big volume hollow concrete of the utility model tunnel lining structure; Its concrete lining comprises arch ring section, abutment wall section and inverted arch section; It is characterized in that: have vertical hole of laying at interval along circumferentially in the said concrete lining, perhaps have the hoop hole of laying along its longitudinal separation.
The beneficial effect of the utility model is, can effectively reduce the crack that the concrete in mass heat of hydration is produced, and avoids the large tracts of land structural cracks crisscross; Effectively improve structure impermeability, globality; Guarantee open cut tunnel Structural Engineering quality and durability, the maintenance cost after reducing construction of tunnel and putting into effect prolongs engineering application life; Reduce the cost of lifetime, have the significant social economic benefit; Bring into play concrete material pressurized performance effectively, satisfied under the structure stress condition, reduced neutral axis place volume of concrete, practiced thrift lining concrete lining cutting bricklaying, had good economic benefit; Can be for station tunnel, stride high backfill load open cut tunnel tunnel, the dark hole tunnel of large span super large imposed load and particular tunnel liner structure pipeline, ventilation, equipment installation etc. greatly and provide between empty profit; Have the quadratic space development and application values, tunnel lining is become melt stressed and space development in the multifunction structure of one.
Description of drawings
This manual comprises following six width of cloth accompanying drawings:
Fig. 1 is the sketch map in the big volume hollow concrete of the utility model tunnel lining structure embodiment 1 tunnel;
Fig. 2 is the sectional view along A-A line among Fig. 1;
Fig. 3 is the zoomed-in view of local B among Fig. 1;
Fig. 4 is the sketch map in the big volume hollow concrete of the utility model tunnel lining structure embodiment 2 tunnels;
Fig. 5 is the sectional view along C-C line among Fig. 4;
Fig. 6 is the zoomed-in view of local D among Fig. 4;
Toponym and pairing mark among the figure: concrete lining 10, arch ring section 11, abutment wall section 12, inverted arch section 13, vertical hole 20, hoop hole 21, aperture φ, thickness H, thickness h
1, thickness h
2, pitch of holes d
1, wall thickness d between the hole
2
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
With reference to Fig. 1, the big volume hollow concrete tunnel lining structure of the utility model, its concrete lining 10 comprises arch ring section 11, abutment wall section 12 and inverted arch section 13.Have vertical hole 20 (seeing figures.1.and.2) of laying at interval along circumferentially in the said concrete lining 10, perhaps have the hoop hole of laying along its longitudinal separation 21 (with reference to Fig. 4 and Fig. 5).Vertically the setting of hole 20, hoop hole 21 can effectively reduce the crack that the concrete in mass heat of hydration is produced; Avoid the large tracts of land structural cracks crisscross, effectively improve structure impermeability, globality, guarantee open cut tunnel Structural Engineering quality and durability; Reduce the maintenance cost after construction of tunnel puts into effect; Prolong engineering application life, reduce the cost of lifetime, have the significant social economic benefit; Can bring into play concrete material pressurized performance effectively, satisfy under the structure stress condition, reduce neutral axis place volume of concrete, practice thrift lining concrete lining cutting bricklaying, have good economic benefit; Can be station tunnel, stride tunnel and particular tunnel liner structure pipeline, ventilation, equipment installation etc. greatly and provide between empty profit, have the quadratic space development and application values, tunnel lining is become melt stressed and space development in the multifunction structure of one.
Compare with the solid concrete liner structure that carry out in hollow concrete tunnel lining structure cross section, bending rigidity is big.Under the bigger operating mode of moment of flexure, can bring into play the mechanical property of material better.Good from heavy and light, anti-seismic performance; Compare with the solid concrete liner structure; Adopt identical steel concrete sectional dimension, the bearing capacity of hollow concrete generally is not less than the bearing capacity of corresponding single solid steel reinforced concrete, and has the mechanical property that almost is equal to the single solid steel reinforced concrete.
For ease of construction, the cross section of said vertical hole 20, hoop hole 21 is rounded usually.When adopting vertical hole 20, vertically hole 20 is laid in arch ring section 11, abutment wall section 12 usually.Through a large amount of research and experiments, can confirm that relevant major parameter is following:
Vertically the aperture φ of hole 20, hoop hole 21 satisfies 1/5H＜φ＜1/3H, and H is the thickness of concrete lining 10;
Pitch of holes d
1>=2 φ, wall thickness d between the hole
2>=20cm;
Optimum hollow rate ρ is 2%＜ρ＜10%, and hollow rate ρ is the ratio of each vertical hole 20, hoop hole 21 volume sums and concrete lining 10 volumes;
Thickness h between vertical hole 20, hoop hole 21 and concrete lining 10 external surfaces, the inner surface
1, h
2All greater than 30cm.
Some principles of the above the big volume hollow concrete of the utility model tunnel lining structure that just explains through diagrams; Be not be to the utility model be confined to shown in described concrete structure and the scope of application in; So every the modify and equivalent that might be utilized all belongs to the claim that the utility model is applied for.
Claims (5)
1. big volume hollow concrete tunnel lining structure; Its concrete lining (10) comprises arch ring section (11), abutment wall section (12) and inverted arch section (13); It is characterized in that: have vertical hole (20) of laying at interval along circumferentially in the said concrete lining (10), perhaps have the hoop hole of laying along its longitudinal separation (21).
2. big according to claim 1 volume hollow concrete tunnel lining structure is characterized in that: the cross section of said vertical hole (20), hoop hole (21) is rounded.
3. like the said big volume hollow concrete tunnel lining structure of claim 2, it is characterized in that: said vertical hole (20) is laid in arch ring section (11), abutment wall section (12).
4. like claim 2 or 3 said big volume hollow concrete tunnel lining structures, it is characterized in that: the aperture φ of said vertical hole (20), hoop hole (21) satisfies 1/5H＜φ＜1/3H, and H is the thickness of concrete lining (10); The pitch of holes d of adjacent two vertical holes (20), hoop hole (21)
1>=2 φ, wall thickness d between the hole
2>=20cm; Hollow rate ρ is 2%＜ρ＜10%.
5. like the said big volume hollow concrete tunnel lining structure of claim 4, it is characterized in that: the thickness h between said vertical hole (20), hoop hole (21) and concrete lining (10) external surface, the inner surface
1, h
2All greater than 30cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205681152U CN202402040U (en) | 2011-12-30 | 2011-12-30 | Large-volume hollow-concrete tunnel lining structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205681152U CN202402040U (en) | 2011-12-30 | 2011-12-30 | Large-volume hollow-concrete tunnel lining structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202402040U true CN202402040U (en) | 2012-08-29 |
Family
ID=46699691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205681152U Expired - Lifetime CN202402040U (en) | 2011-12-30 | 2011-12-30 | Large-volume hollow-concrete tunnel lining structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202402040U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410029A (en) * | 2011-12-30 | 2012-04-11 | 中铁二院工程集团有限责任公司 | Mass hollow concrete tunnel lining structure |
| CN103147770A (en) * | 2013-03-24 | 2013-06-12 | 中铁二院工程集团有限责任公司 | Large-span heavy load stress induction type backfilling open cut tunnel lining structure |
-
2011
- 2011-12-30 CN CN2011205681152U patent/CN202402040U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410029A (en) * | 2011-12-30 | 2012-04-11 | 中铁二院工程集团有限责任公司 | Mass hollow concrete tunnel lining structure |
| CN103147770A (en) * | 2013-03-24 | 2013-06-12 | 中铁二院工程集团有限责任公司 | Large-span heavy load stress induction type backfilling open cut tunnel lining structure |
| CN103147770B (en) * | 2013-03-24 | 2016-09-21 | 中铁二院工程集团有限责任公司 | Large-span heavy-load stress induced backfill open cut tunnel liner structure |
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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: 20120829 |
|
| CX01 | Expiry of patent term |