CN206845198U - A kind of tunnel CRD engineering method anti-leakage structures - Google Patents
A kind of tunnel CRD engineering method anti-leakage structures Download PDFInfo
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- CN206845198U CN206845198U CN201720766968.4U CN201720766968U CN206845198U CN 206845198 U CN206845198 U CN 206845198U CN 201720766968 U CN201720766968 U CN 201720766968U CN 206845198 U CN206845198 U CN 206845198U
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Abstract
The utility model discloses a kind of tunnel CRD engineering method anti-leakage structures, it is characterised in that：The main structure body is divided into left side top heading, base tunnel under left side, right side top heading, the interim mid-board and stull, inverted arch and arch wall that four parts of base tunnel and later stage can be removed under right side；Left side hole long pipe shed and right side hole long pipe shed, wherein ductule front pre-grouting, base tunnel is equipped with supporting under base tunnel, right side top heading and right side under left side top heading, left side；In the foundation and vault of interim mid-board, and the left and right sides of stull, prefabricated steel is respectively welded, the prefabricated steel and I-steel welding are closely knit, and together with two lining concretings, prefabricated steel, I-steel and two lining concrete collectively form waterproof construction；Inverted arch is poured on the waterproof layer of inverted arch；The lining of molding two concrete on the waterproof layer of arch wall.The above method improves the efficiency of construction of tunnel CRD engineering methods, enhances the stability of support system in temporary support demolishing process, and prevents that remaining shaped steel punctures splash guard, improves the construction quality of splash guard.
Description
Technical field
Geotechnical Engineering field is the utility model is related to, for underground engineering, more particularly to a kind of tunnel CRD engineering method antiseeps
Structure and Antiseep method
Background technology
CRD also known as intersects interval method, in weak surrounding rock Large span tunnel, one or two parts of first tunneling side, applies
Make part median septum and diaphragm plate, then one or two parts of tunneling opposite side, complete diaphragm plate construction；Then excavate again most
The first decline of construction side, and extend median septum, finally excavate the construction method of remainder.It should mainly be enclosed in IV grade
The construction of rock shallow embedding, bias location and V grade of country rock section.
CRD engineering methods are applied to the V of special fragmented rock, gravelly soil, land pebble, circle gravel soil, dust soil and loess composition
It is level country rock and soft modeling shape cohesive soil, VI grade of country rock of moist Extra-fine sand composition and Portal Section in poor country rock, biased segment, shallow
Bury section etc..For steady operation face, when being constructed using CRD engineering methods, must take super-front large pipe shed, advance anchor bolt, advanced small pipe shed,
The auxiliary construction measures such as front pre-grouting, area face closure carry out advance reinforcement.Typically matched somebody with somebody using hand excavation, artificial and machinery
Close muck removal.Controlled blasting can be suitably used, in order to avoid destroy completed temporary support partition wall and interim inverted arch.
After the completion of the just branch construction of CRD engineering methods tunnel, two lining constructions need to be carried out, construct two lining inverted arch (thick 45cm) portions first
Point.What must be carried out before inverted arch construction is the laying of EVA splash guards, and in order to ensure splash guard construction quality, traditional method is to remove certain
The interim median septum (shaped steel H22) of one construction section (6~9m) 50%, remaining 50% median septum are cut off (from first branch inverted arch bottom one by one
Above 25cm shaped steel is cut off), while after performing splash guard, part shaped steel will be cut off in time and put back to original position, by that analogy.But should
Engineering method easily punctures splash guard with residual shaped steel and brings hidden leakage defect.For this reason, it is necessary to solves CRD engineering method splash guard process of deployment
What is easily occurred punctures the hidden danger for causing underground water seepage.
Utility model content
The utility model, which solves the problems, such as that puncturing easily occurs in CRD engineering method splash guard process of deployment, causes underground water seepage.
The purpose of this utility model is the defects of solution in the prior art, and it provides a kind of tunnel CRD engineering method antiseeps
Structure and Antiseep method.
The technical scheme that the utility model proposes with regard to above-mentioned technical problem is as follows：
A kind of tunnel CRD engineering method anti-leakage structures, it is characterised in that：The main structure body is divided into left side top heading, under left side
Base tunnel, right side top heading, the interim mid-board and stull, inverted arch and arch that four parts of base tunnel and later stage can be removed under right side
Wall；
Left side hole long pipe shed and right side hole long pipe shed, wherein ductule front pre-grouting, lead under left side top heading, left side
Base tunnel is equipped with supporting under hole, right side top heading and right side；
In the foundation and vault of interim mid-board, and the left and right sides of stull, prefabricated steel is respectively welded, this is prefabricated
Steel plate and I-steel welding are closely knit, and together with two lining concretings, prefabricated steel, I-steel and two lining concrete are common
Form waterproof construction；
Inverted arch is poured on the waterproof layer of inverted arch；
Mould builds two lining concrete on the waterproof layer of arch wall.
Preferably, the supporting includes setting up grid steel frame, sprays C25 concrete.
Preferably, the prefabricated steel cuts into small steel plate by one piece big steel plate, then " work " will be cut away in small steel plate
Shape, finally small steel plate is symmetrically cut in half and formed.
Preferably, the thickness of steel plate is 6~10mm, and small steel plate is width 400*400mm square, will be cut in small steel plate
" work " font removed is located at the centre of small steel plate, and its size and the size of I-steel match.
Preferably, cut direction when small steel plate is symmetrically cut is the longitudinal direction along " work " font.
Preferably, require that two pieces of prefabricated steels are docked when prefabricated steel is welded with I-steel, and the shape and work of vacancy
Word steel matches.
On the other hand, a kind of tunnel CRD engineering method anti-leakage structures are also provided, it passes through tunnel CRD engineering method Antiseep methods
Formed.
Preferably, the structure includes waterproof construction, and the waterproof construction is by steel plate, I-steel and the two lining common structures of concrete
Into.
Preferably, in the foundation and vault of mid-board, and the left and right sides of stull, it is respectively welded closely knit with I-steel
The prefabricated steel of welding, and together with two lining concretings, prefabricated steel, I-steel collectively form anti-with two lining concrete
Water-bound.
Preferably, inverted arch and arch wall are designed with waterproof layer.
The beneficial effects of the utility model：
(1) efficiency of construction of tunnel CRD engineering methods is improved；
(2) stability of support system in temporary support demolishing process is improved, ensures construction safety.
(3) prevent that remaining shaped steel punctures splash guard, improves the construction quality of splash guard.
Brief description of the drawings
Fig. 1, under ground cut tunnel section construction schematic diagram；
Fig. 2, under ground cut tunnel section longitudinal direction construction profilograph；
Fig. 3, tunnel CRD engineering method Antiseep method construction procedure figures；
Fig. 4, tunnel CRD engineering method Antiseep method construction procedure block diagrams；
Fig. 5, steel plate cutting schematic diagram；
Fig. 6, prefabricated steel and I-steel welding illustrate；
Fig. 7, waterproof construction welding position.
Reference
I left side hole long pipe shed, 2 left side top headings, III left side top heading supporting, the lower base tunnel in 4 left sides, the lower base tunnel branch in V left side
Shield, VI right side hole long pipe shed, 7 right side top headings, VIII right side top heading supporting, the lower base tunnel in 9 right sides, the lower base tunnel supporting in Ⅹ right side,
Ⅺ inverted arch, Ⅻ arch wall.
Embodiment
In order to which the technical characteristics of the utility model, purpose and effect are more clearly understood, it is detailed now to compare accompanying drawing
Illustrate specific embodiment of the present utility model.
Embodiment one
Fig. 1 shows under ground cut tunnel section construction schematic diagram, this practical CRD engineering methods anti-leakage structure and construction party
Method.Fig. 2 shows that longitudinally construction profilograph, Fig. 3 show that tunnel CRD engineering method Antiseep methods are applied under ground cut tunnel section
Work block diagram, Fig. 4 show tunnel CRD engineering method Antiseep method construction procedure block diagrams, and this four accompanying drawings integrally illustrate tunnel
The Antiseep method of CRD engineering methods.
A kind of tunnel CRD engineering method anti-leakage structures, it is characterised in that：The main structure body is divided into left side top heading 2, under left side
Base tunnel 4, right side top heading 7, the interim mid-board and stull that 9 four parts of base tunnel and later stage can be removed under right side, inverted arch
Ⅺ and arch wall；
Left side hole long pipe shed I and right side hole long pipe shed VI, wherein ductule front pre-grouting, left side top heading 2, under left side
Base tunnel 4, right side top heading 7, base tunnel 9 is equipped with supporting under right side, is respectively：Base tunnel branch under left side top heading supporting III, left side
Shield V, the lower base tunnel supporting in the right side of right side top heading supporting VIII and Ⅹ.
In the foundation and vault of interim mid-board, and the left and right sides of stull, prefabricated steel is respectively welded, this is prefabricated
Steel plate and I-steel welding are closely knit, and together with two lining concretings, prefabricated steel, I-steel and two lining concrete are common
Form waterproof construction；
Inverted arch Ⅺ is poured on the waterproof layer of inverted arch；
Mould builds two lining concrete on the waterproof layer of arch wall Ⅻ.
Wherein, the supporting includes setting up grid steel frame, sprays C25 concrete.The thickness of supporting is preferably 30cm thickness.
In process of deployment, when in left side, top heading 2 excavates, the size of the advanced tubule of selection is Φ 42, and length is preferably 3m, ring
It is 300mm to spacing, every 2 Pin steel arch-shelfs perform a row, and the spacing of steel arch-shelf is 0.5 meter.The size of long pipe shed is Φ 108, long
It is 300mm to spend for preferably 23.05m, ring spacing, and camber is 150 °, while is fixed using lock pin anchor tube, preferred size Φ
42, length 3m.Lock pin anchor tube forms an angle with four supportings, preferably 30 ° or 45 °.
Two lining concrete selection C35 models, P10.
When being constructed in tunnel, 10~25m. of the distance between left side top heading 2 and right side top heading 7 is preferably 10~
18m, more preferably 16~18m, wherein the distance of base tunnel 9 is not less than 6m, preferably 6~8m under left side top heading 2 and left side.
Embodiment two
Waterproof construction in tunnel CRD engineering method anti-leakage structures is collectively formed by steel plate, I-steel and two lining concrete.
Fig. 5-7 shows the concrete structure of waterproof construction and the position in tunnel, wherein Fig. 5 positions steel plate cutting signal
Figure, its light plate preferred thickness are 6~10mm big steel plate, are then cut into the small steel plate of square, and small steel plate width is preferably
400*400mm." work " font will be cut away in small steel plate, and its size and the size of I-steel match, " work " font length
Preferably 240mm, width are preferably 20mm, positioned at the centre of the small steel plate of square.During cutting, along the longitudinal direction of " work " font
Cut.
Fig. 6 is that prefabricated steel illustrates with I-steel welding, and two pieces of prefabricated steels are required when prefabricated steel is welded with I-steel
Docking, and the shape of vacancy matches with I-steel
Fig. 7 is the welding position of waterproof construction, and waterproof construction is welded on the top of interim mid-board, including foundation and arch
Top, and the left and right sides of stull.Meanwhile inverted arch and arch wall are designed with waterproof layer.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (9)
- A kind of 1. tunnel CRD engineering method anti-leakage structures, it is characterised in that：The main structure body is divided into left side top heading, is led under left side Cheat, right side top heading, the interim mid-board and stull, inverted arch and arch that four parts of base tunnel and later stage can be removed under right side Wall；Left side hole long pipe shed and right side hole long pipe shed, wherein ductule front pre-grouting, base tunnel, the right side under left side top heading, left side Base tunnel is equipped with supporting under side top heading and right side；In the foundation and vault of interim mid-board, and the left and right sides of stull, prefabricated steel is respectively welded, the prefabricated steel It is closely knit with I-steel welding, and together with two lining concretings, prefabricated steel, I-steel and two lining concrete collectively form Waterproof construction；Inverted arch is poured on the waterproof layer of inverted arch；Mould builds two lining concrete on the waterproof layer of arch wall.
- 2. anti-leakage structure as claimed in claim 1, it is characterised in that the supporting includes setting up grid steel frame, sprays C25 Concrete.
- 3. anti-leakage structure as claimed in claim 1, it is characterised in that the prefabricated steel is cut into by one piece big steel plate Small steel plate, then " work " shape will be cut away in small steel plate, finally small steel plate is symmetrically cut in half and formed.
- 4. anti-leakage structure as claimed in claim 3, it is characterised in that the thickness of steel plate is 6~10mm, and small steel plate is width 400*400mm square, " work " font cut away in small steel plate is located to the centre of small steel plate, and its size and I-shaped The size of steel matches.
- 5. anti-leakage structure as claimed in claim 1, it is characterised in that cut direction when small steel plate is symmetrically cut is edge The longitudinal direction of " work " font.
- 6. anti-leakage structure as claimed in claim 1, it is characterised in that two pieces are required when prefabricated steel is welded with I-steel in advance Steel plate docking processed, and the shape of vacancy matches with I-steel.
- 7. such as the anti-leakage structure any one of claim 1-6, it is characterised in that：The structure includes waterproof construction, institute Waterproof construction is stated to be collectively formed by steel plate, I-steel and two lining concrete.
- 8. such as the anti-leakage structure any one of claim 1-6, it is characterised in that：In the foundation and vault of mid-board, And the left and right sides of stull, the prefabricated steel with the closely knit welding of I-steel is respectively welded, and exist with two lining concretings Together, prefabricated steel, I-steel and two lining concrete collectively form waterproof construction.
- 9. such as the anti-leakage structure any one of claim 1-6, it is characterised in that：Inverted arch and arch wall are designed with waterproof Layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720766968.4U CN206845198U (en) | 2017-06-28 | 2017-06-28 | A kind of tunnel CRD engineering method anti-leakage structures |
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| CN201720766968.4U CN206845198U (en) | 2017-06-28 | 2017-06-28 | A kind of tunnel CRD engineering method anti-leakage structures |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828051A (en) * | 2020-07-28 | 2020-10-27 | 中建七局安装工程有限公司 | Construction method of two-lining middle partition wall injection tunnel with support |
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2017
- 2017-06-28 CN CN201720766968.4U patent/CN206845198U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828051A (en) * | 2020-07-28 | 2020-10-27 | 中建七局安装工程有限公司 | Construction method of two-lining middle partition wall injection tunnel with support |
| CN111828051B (en) * | 2020-07-28 | 2022-04-15 | 中建七局安装工程有限公司 | Construction method of two-lining middle partition wall injection tunnel with support |
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