CN106224001A - Special protection device and preparation method is encircleed at the bottom of a kind of big cross section circular tunnel flow-passing surface - Google Patents
Special protection device and preparation method is encircleed at the bottom of a kind of big cross section circular tunnel flow-passing surface Download PDFInfo
- Publication number
- CN106224001A CN106224001A CN201610837293.8A CN201610837293A CN106224001A CN 106224001 A CN106224001 A CN 106224001A CN 201610837293 A CN201610837293 A CN 201610837293A CN 106224001 A CN106224001 A CN 106224001A
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- China
- Prior art keywords
- water
- passing surface
- protection device
- tunnel flow
- geotextiles
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- 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.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
Abstract
The present invention is to encircle special protection device and preparation method at the bottom of a kind of circular tunnel flow-passing surface.It mainly includes the brick gutter that geotextiles, bamboo springboard, graded broken stone, the steady layer of water and both sides are arranged, geotextiles is arranged in and pours on arch at the bottom of round tunnel flow-passing surface, bamboo springboard is laid on above geotextiles, cover geotextiles, graded broken stone is layered on above bamboo springboard, grinding compacting, and the steady layer of water is layered on above graded broken stone, rolling flat smooth, water steady layer both sides arrange brick gutter.Described graded broken stone mixture is the middle stone of 15%, the gravelstone of 45%, the sand of 40%；The steady layer of described water uses sandstone aggregate mixing to add the cement plus water mixing of weight is sandstone aggregate weight 4% after completing and forms, wherein sandstone aggregate by 55% gravelstone, the sand composition of 45%.Present invention improves civilized construction environment, overcome efficiency of construction low, it is big that personnel clear up labor intensity, time-consumingly take a lot of work, the problems such as potential safety hazard is prominent, reduce hand labor intensity and potential safety hazard, improve civilized construction image, accelerating construction progress, save construction cost.
Description
Technical field
The invention belongs to Hydraulic and Hydro-Power Engineering technical field, be specifically related to arch spy at the bottom of a kind of big cross section circular tunnel flow-passing surface
Different protection device and preparation method.
Background technology
The big cross section circle that there is various performance in large water conservancy hydroelectric engineering is constructed crosses stream tunnel, such as diversion tunnel
Hole, tailwater tunnel etc., along with maturation and the development of Construction for Hydroelectric Project technology, at present, most of circular tunnel concrete
Lining construction method is generally: the concrete in the range of first being encircleed 100 °～120 ° the end uses overmolded to pour, and then remains
In the range of 260 °～240 °, side-top arch concrete uses telescoping steel form to pour.
Circular stream tunnel of crossing in end arch lining finishes building into the construction carrying out side-top arch concrete lining cutting, concrete mixer truck and
Payload materials transport vehicle need to be current on the end arch that lining cutting completes, and circular tunnel side and roof arch lining cutting accounts for Construction of Tunnel Liner work
Phase and more than the 70% of workload, when side and roof arch is constructed, material and foreign material cannot be avoided causing on the end arch that can drop to water
Damaging, additionally the vehicle pass-through time is longer, easily causes abrasion, destruction to pouring end arch, and tunnel flow-passing surface is typically to lining
Building concrete appearance requirement is higher, also can affect its overall operation effect and outward appearance even across after repairing.
Common tunnel invert concrete protective method is directly to pad excavation rock ballast in one layer of hole on end arch concrete, and
Need tunnel side and roof arch pouring concrete carries out maintenance of sprinkling water during carrying out tunnel side-top arch concrete lining cutting, and at car
During current can entrapped moisture and mud, easily cause that the rock ballast of protection is muddy can't bear, on-the-spot civilized construction image extreme difference,
On-the-spot civilized construction requirement cannot be met, need to put into substantial amounts of artificial and equipment and safeguard, and do not have effect.Therefore,
How overcoming the deficiencies in the prior art is the problem that current Hydraulic and Hydro-Power Engineering technical field needs solution badly.
Summary of the invention
The invention aims to solve the protection of existing tunnel invert and the deficiency of civilized construction, it is provided that a kind of circular tunnel
Encircle special protection device and preparation method at the bottom of the flow-passing surface of hole, improve construction environment to a great extent, reduce security risk,
Reduce overall construction cost, accelerate construction speed.For achieving the above object, the technical solution used in the present invention is as follows:
Encircle special protection device at the bottom of a kind of circular tunnel flow-passing surface, mainly include geotextiles, bamboo springboard, graded broken stone, the steady layer of water
And the brick gutter that both sides are arranged, geotextiles is arranged in and pours on arch at the bottom of round tunnel flow-passing surface, and bamboo springboard is laid on
Above geotextiles, covering geotextiles, graded broken stone is layered on above bamboo springboard, grinding compacting, and the steady layer of water is layered on graded broken stone
Face, rolls flat smooth, and arch protection water steady layer both sides, the end arrange brick gutter.
The steady layer of described water is made up of cement, gravelstone and sand.
Described bamboo springboard is to be worn by blocks of bamboo chip steel bar, is processed into width 20～30cm, the plate of length 3m
Block object.
Described gutter uses the Rhizoma Begoniae Willsonii of 24cm × 11.5cm × 5.3cm to build by laying bricks or stones, and brick width is 20cm.
Described geotextiles thickness 5mm.
A kind of method for encircleing special protection device at the bottom of circular tunnel flow-passing surface, broken by geotextiles, bamboo springboard, grating
The protection device arranged described in formation in the brick gutter of the steady layer of stone, water and both sides, bamboo springboard is placed in above geotextiles, level
Joining rubble on bamboo springboard, the steady layer of water is on graded broken stone, and water steady layer both sides arrange brick gutter, described level
Join the middle stone that rubble match ratio is 15%, the gravelstone of 45%, the sand of 40%；After the steady layer of described water uses sandstone aggregate mixing to complete
Add the cement plus water mixing of weight is sandstone aggregate weight 4% to form, wherein sandstone aggregate by 55% gravelstone, 45%
Sand forms.
Described geotextiles is laid immediately on 60 ° of scopes of arch at the bottom of the circular tunnel flow-passing surface poured.
Described water steady layer interior thickness is 30cm, and draining is easy on the slope laterally arranging 3% from centre to both sides.
The middle stone particle diameter of described graded broken stone is 37.5 ~ 19mm, and the particle diameter of gravelstone is 19 ~ 4.75mm, the particle diameter of sand <
4.75mm。
Gravelstone particle diameter in the proportioning of the steady layer of described water is 19 ~ 4.75mm, the particle diameter < 4.75mm of sand.
Compared with prior art, it has the beneficial effect that the present invention
1, circle is crossed stream tunnel invert protection and is changed into pad geotextiles, bamboo springboard, graded broken stone by conventional pinner slag by the present invention
And the steady layer of water, and gutter is set in both sides, and improving civilized construction environment, overcome efficiency of construction low, personnel clear up labor
The problems such as fatigue resistance is big, time-consumingly takes a lot of work, and potential safety hazard is prominent, can reduce civilized construction Meteorological by the present invention, reduce
Hand labor intensity and potential safety hazard, improve civilized construction image, accelerating construction progress, save construction cost.
2, after the present invention uses geotextiles, bamboo springboard, graded broken stone and the steady layer of water that circular flow-passing surface is carried out special protection,
Making road surface slippery smooth, construction waste water is flowed directly to gutter, both sides, and on-the-spot civilized construction environment is preferable, and disposable input makes
With rear, except cleaning road surface in time, it is not necessary to as the arch protection of the existing end needs the regular rock ballast to argillization position to clear up also
Again lay, decrease the input of personnel and equipment, reduce the interference to side and roof arch concrete construction, accelerate construct into
Degree, compared with existing guard method, can save the cost of 20%.
3, the invention belongs to the category that Hydraulic and Hydro-Power Engineering technical field basis is changed, water conservancy and hydropower work will be promoted greatly
Arch protection progress in terms of technique, efficiency at the bottom of journey circular tunnel flow-passing surface, in the document of tunnel concrete construction at home and abroad also
Have no relevant report.
4, the present invention yet there are no and applies in Construction of Hydropower Engineering, its labor intensity being intended to reduce workmen,
Cost-effective, improve civilized construction image, improve efficiency of construction.Apply in large-scale circular crosses the construction of stream tunnel concrete liner
It is worth higher.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, and the accompanying drawing in describing below is only that some of the present invention are real
Execute example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to attached according to these
Figure obtains other accompanying drawing.
Fig. 1 be the present invention circular tunnel flow-passing surface at the bottom of encircle special protection device schematic diagram；
Wherein, 1, geotextiles；2, bamboo springboard；3, graded broken stone；4, the steady layer of water；5, fragment of brick；6, round tunnel flow-passing surface has been poured
The end, encircles.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example is merely to illustrate the present invention, and should not be regarded as limiting this
Bright scope.Unreceipted concrete technology or condition person in embodiment, according to the technology described by the document in this area or condition
Or carry out according to product description.Material therefor, equipment or instrument unreceipted production firm person, is and can be obtained by purchase
The conventional products obtained.
Special protection device is encircleed as it is shown in figure 1, it includes geotextiles 1, bamboo springboard at the bottom of the circular tunnel flow-passing surface of the present invention
2, graded broken stone 3, the steady layer of water 4, fragment of brick 5.It is constituted and preparation method is as follows:
Described geotextiles 1 is laid immediately on end arch, and lays smooth；
Described bamboo springboard 2 is laid on above geotextiles, and laying should be tight；
Described graded broken stone 3 uses the middle stone (particle diameter 37.5 ~ 19mm) of 15%, the gravelstone (particle diameter 19 ~ 4.75mm) of 45%, and 40%
Sand (particle diameter < 4.75mm) mixing after transport and be laid in above bamboo springboard to scene, and use vibrating roller grinding compacting；
The steady layer of described water 4 uses sandstone aggregate mixing to add the cement plus water of weight is sandstone aggregate weight 4% after completing
Mixing forms, wherein sandstone aggregate by 55% gravelstone (particle diameter 19 ~ 4.75mm), the sand of 45% (particle diameter < 4.75mm) composition, mixing
Transport after completing and encircle at the bottom of circular tunnel flow-passing surface, use backhoe stone, more smooth with vibrating roller grinding compacting, in the middle of the steady layer of water
Thickness is 30cm, and draining is easy on the slope laterally arranging 3% from centre to both sides.
Described gutter uses Rhizoma Begoniae Willsonii 5 to build by laying bricks or stones, is arranged on water steady layer both sides, and brick width is 20cm, and pavement construction gives up
Water is flow in gutter by sloping ground, and side and roof arch curing water flows into gutter by both sides abutment wall.
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (10)
1. at the bottom of a circular tunnel flow-passing surface, encircle special protection device, it is characterised in that: mainly include geotextiles, bamboo springboard, level
Joining the brick gutter that rubble, the steady layer of water and both sides are arranged, geotextiles is arranged in and pours on arch at the bottom of round tunnel flow-passing surface,
Bamboo springboard is laid on above geotextiles, covers geotextiles, and graded broken stone is layered on above bamboo springboard, grinding compacting, and the steady layer of water spreads
On graded broken stone, rolling flat smooth, water steady layer both sides arrange brick gutter.
Special protection device is encircleed at the bottom of circular tunnel flow-passing surface the most according to claim 1, it is characterised in that: described water is steady
Layer is made up of cement, gravelstone and sand.
Special protection device is encircleed at the bottom of circular tunnel flow-passing surface the most according to claim 1, it is characterised in that: described bamboo jumps
Plate is to be worn by blocks of bamboo chip steel bar, is processed into width 20～30cm, the plate-like object of length 3m.
Special protection device is encircleed at the bottom of circular tunnel flow-passing surface the most according to claim 1, it is characterised in that: described draining
Ditch uses the Rhizoma Begoniae Willsonii of 24cm × 11.5cm × 5.3cm to build by laying bricks or stones, and brick width is 20cm.
Special protection device is encircleed at the bottom of circular tunnel flow-passing surface the most according to claim 1, it is characterised in that: described geotechnique
Cloth thickness 5mm.
6. at the bottom of circular tunnel flow-passing surface as claimed in claim 1, encircle the preparation method of special protection device, it is characterised in that: logical
Cross geotextiles, bamboo springboard, graded broken stone, the protection device arranged described in formation in the brick gutter of the steady layer of water and both sides, bamboo
Springboard is placed in above geotextiles, graded broken stone on bamboo springboard, the steady layer of water on graded broken stone, water steady layer both sides
Arranging brick gutter, described graded broken stone mixture is the middle stone of 15%, the gravelstone of 45%, the sand of 40%；The steady layer of described water
The cement plus water mixing using sandstone aggregate mixing to add weight is sandstone aggregate weight 4% after completing forms, wherein sandstone
Aggregate by 55% gravelstone, 45% sand composition.
The preparation method of special protection device is encircleed at the bottom of circular tunnel flow-passing surface the most according to claim 6, it is characterised in that:
Described geotextiles is laid immediately on 60 ° of scopes of arch at the bottom of the circular tunnel flow-passing surface poured.
The preparation method of special protection device is encircleed at the bottom of circular tunnel flow-passing surface the most according to claim 6, it is characterised in that:
Described water steady layer interior thickness is 30cm, and draining is easy on the slope laterally arranging 3% from centre to both sides.
The preparation method of special protection device is encircleed at the bottom of circular tunnel flow-passing surface the most according to claim 6, it is characterised in that:
The middle stone particle diameter of described graded broken stone is 37.5 ~ 19mm, and the particle diameter of gravelstone is 19 ~ 4.75mm, the particle diameter < 4.75mm of sand.
Encircleing the preparation method of special protection device at the bottom of circular tunnel flow-passing surface the most according to claim 6, its feature exists
In: the gravelstone particle diameter in the proportioning of the steady layer of described water is 19 ~ 4.75mm, the particle diameter < 4.75mm of sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610837293.8A CN106224001B (en) | 2016-09-21 | 2016-09-21 | A kind of big cross section circular tunnel flow-passing surface bottom arch special protection device and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610837293.8A CN106224001B (en) | 2016-09-21 | 2016-09-21 | A kind of big cross section circular tunnel flow-passing surface bottom arch special protection device and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106224001A true CN106224001A (en) | 2016-12-14 |
| CN106224001B CN106224001B (en) | 2018-05-18 |
Family
ID=58075743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610837293.8A Active CN106224001B (en) | 2016-09-21 | 2016-09-21 | A kind of big cross section circular tunnel flow-passing surface bottom arch special protection device and preparation method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000145392A (en) * | 1998-11-04 | 2000-05-26 | Fujimori Sangyo Kk | Tunnel execution method |
| CN202402077U (en) * | 2011-12-28 | 2012-08-29 | 浙江大学 | Flat and straight linear highway tunnel with drainage system |
| CN202560319U (en) * | 2012-04-01 | 2012-11-28 | 中铁十二局集团第二工程有限公司 | Tunnel drainage and pressure reduction structure |
| CN103334770A (en) * | 2013-06-09 | 2013-10-02 | 中铁隧道集团有限公司 | Construction method of superhigh water pressure water-affluent crushed zones of long-large counter-slope tunnels |
| CN103670446A (en) * | 2013-12-13 | 2014-03-26 | 中铁二十三局集团有限公司 | Method for constructing circular diversion tunnel 2/3 circular concrete lining |
| CN206092062U (en) * | 2016-09-21 | 2017-04-12 | 中国水利水电第十四工程局有限公司 | Special protection device encircles at bottom of big circular tunnel flow surface of section |
-
2016
- 2016-09-21 CN CN201610837293.8A patent/CN106224001B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000145392A (en) * | 1998-11-04 | 2000-05-26 | Fujimori Sangyo Kk | Tunnel execution method |
| CN202402077U (en) * | 2011-12-28 | 2012-08-29 | 浙江大学 | Flat and straight linear highway tunnel with drainage system |
| CN202560319U (en) * | 2012-04-01 | 2012-11-28 | 中铁十二局集团第二工程有限公司 | Tunnel drainage and pressure reduction structure |
| CN103334770A (en) * | 2013-06-09 | 2013-10-02 | 中铁隧道集团有限公司 | Construction method of superhigh water pressure water-affluent crushed zones of long-large counter-slope tunnels |
| CN103670446A (en) * | 2013-12-13 | 2014-03-26 | 中铁二十三局集团有限公司 | Method for constructing circular diversion tunnel 2/3 circular concrete lining |
| CN206092062U (en) * | 2016-09-21 | 2017-04-12 | 中国水利水电第十四工程局有限公司 | Special protection device encircles at bottom of big circular tunnel flow surface of section |
Non-Patent Citations (1)
| Title |
|---|
| 陈加义: "小湾水电站泄洪洞有压段底拱混凝土施工", 《云南水力发电》 * |
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| CN106224001B (en) | 2018-05-18 |
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