CN104018437A - Thin-wall annular assembly mode underground passage - Google Patents
Thin-wall annular assembly mode underground passage Download PDFInfo
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- CN104018437A CN104018437A CN201410267980.1A CN201410267980A CN104018437A CN 104018437 A CN104018437 A CN 104018437A CN 201410267980 A CN201410267980 A CN 201410267980A CN 104018437 A CN104018437 A CN 104018437A
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- side wall
- wall
- underground passage
- top board
- bracer
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Abstract
The invention relates to a thin-wall annular assembly mode underground passage. The thin-wall annular assembly mode underground passage comprises a top plate, a left side wall, a right side wall and a bottom plate. The top plate is a thin-wall convex arc plate, and the bottom plate is a flat plate. The left side wall and the right side wall are of the same structure, the upper portion of the left side wall and the upper portion of the right side wall are respectively provided with a long arc plate in smooth transition with the top plate, and the lower portion of the left side wall and the lower portion of the right side wall are respectively provided with a short bent plate which is in smooth transition with the bottom plate and is bent towards the inner side. The upper end of the left side wall and the upper end of the right side wall are symmetrically connected to the left end and the right end of the top plate respectively through bolts, the lower end of the left side wall and the lower end of the right side wall are symmetrically connected to the left end and the right end of the bottom plate respectively, and therefore a standard section of the thin-wall annular closed assembly mode underground passage is formed. The thin-wall annular assembly mode underground passage has the advantages that industrialized prefabrication is adopted, the structural quality is good, the construction efficiency is high, the project cost is low, the section of the passage can be standardized and modularized, and the universality is good.
Description
Technical field
The invention belongs to highway engineering or underground passage field of engineering technology, be specifically related to a kind of assembling underground passage structure.
Background technology
In expressway construction, foot bridge is contained all fronts and is distributed more, cast in place process needs a large amount of field type facilities, there is the problems such as construction speed is low, construction costs is high, difficult quality guarantee, therefore, need to develop a kind of prefabricated assembling underground passage structure in highway engineering or underground engineering field practicality, to reach the saving of work and time modularization object of assembling fast while assembling at the scene each member.The structure of existing assembling underground passage, mainly taking assembling box culvert and assembling slab culvert as main.The deadweight of assembling box culvert is larger, therefore higher to hoisting transportation equipment requirement.The shortcoming of assembling slab culvert is that amount of reinforcement is larger, and cost is higher.
Summary of the invention
The defect existing in order to overcome existing assembling underground passage structure, the invention provides a kind of circular thin-wall assembling underground passage.
A kind of circular thin-wall assembling underground passage is formed by three above Component compositions, and described three blocks of above members are top board 1, left side wall 2, right-side wall 3 and base plate 4; Described top board 1 is the circular-arc plate of thin-walled evagination, and base plate 4 is dull and stereotyped; Described left side wall 2 is identical with right-side wall 3 structures, and top is and the long arc plate of top board 1 smooth transition, and bottom is and the bending short bent plate to the inside of base plate 4 smooth transition; Wall 2 upper ends, left side and right-side wall 3 upper ends are connected to respectively the two ends, left and right of top board 1 by bolt symmetry, wall 2 lower ends, left side and right-side wall 3 lower ends configure respectively the two ends, left and right that are connected to base plate 4 symmetrically, form the standard sections of the assembling underground passage of circular thin-wall sealing; The lateral wall bottom of described left side wall 2 is laid with left front bracer 5 and left back bracer 7, same, is laid with right front bracer 6 and right back bracer 8 in right-side wall 3 lateral wall bottoms; On the lateral wall of top board 1, on the arc lateral wall of left side wall 2 and be embedded with respectively the suspension ring of some evaginations on the arc lateral wall of right-side wall 3.
The length L of the standard sections of described circular thin-wall assembling underground passage is 3 meters or 1 meter.
Described top board 1, left side wall 2 and right-side wall 3 are and in factory, after prefabricated completing, are transported to field erected precast member for reinforcing bar concrete again, and both can exchange use the left side wall 2 that size shape structure is identical and right-side wall 3.
The inwall radius of curvature R of described top board 1
1be 1.4 meters~2.8 meters, the thickness t of top board 1 is 0.20 meter~0.32 meter.
The top radius of curvature R of described right-side wall 3
2be 1.2 meters~4.0 meters, right-side wall 3 bottom radius of curvature R
3it is 0.4 meter~1.2 meters.
All there is with the upper end of right-side wall 3 inner groovy that structure is identical the upper end of described left side wall 2, and is connected by curved bolt interlock hoop with the projection of the lower end, two ends, left and right of top board 1 respectively.
The rectangular-shaped flat board that base plate 4 is cast in situs.
Right front bracer 6 is gore, its two sides are the triangle projective planum being parallel to each other, its front-back is that top is the connected rectangle plane of acute angle angle, and rectangle plane four limits of bottom surface are connected with the rectangle plane bottom of two sides triangle projective planum bottom and front and back respectively; Left front bracer 5, left back bracer 7, right back bracer 8 are all identical with right front bracer 6 planforms.
Useful technique effect of the present invention embodies in the following areas:
1. assembly technology fast understands, taking the long passage of 50m as example, assembledly generally only needs each working day of 2-3;
2. economic benefit is obvious, and the average unit contract price of circular thin-wall assembling underground passage reduces approximately 13% than the unit price of cover-plate type passage.
By the definite assembling curved channel planform of traffic capacity Selecting All Parameters, in the case of in advance selected standard headway H, the standard clearance breadth B of assembling curved channel and top board half central angle alpha of top board, the top board left and right sides on top respectively with the level and smooth circular arc in wall upper end, left side and right-side wall upper end be connected, the two ends, base plate left and right of bottom are connected respectively tangently with the level and smooth circular arc in wall lower end, left side and right-side wall lower end; Referring to Figure 10, in this assembling curved channel planform:
(1) the top board inwall radius R of top board
1calculated by following equation:
B
R
1
=—————— (1)
2Sinα
In formula (1)
bfor standard clearance breadth H,
αfor top board half central angle;
(2) the side wall top arc radius R of left side wall and right-side wall
2calculated by following equation:
H
R
2
=———————— (2)
Cosα-Sinα+1
In formula (2)
hfor standard headway H,
αcotype (1);
(3) the side wall bottom arc radius R of left side wall and right-side wall
3calculated by following equation:
(1-Sinα)H
R
3
=—————————— (3)
Cosα-Sinα+1
In formula (3)
hcotype (2),
αcotype (1);
In above three equations: H, B unit are rice, α unit is degree, gained R
1, R
2and R
3unit be rice, by above gained size R
1, R
2and R
3, the template that can make top board, left side wall and the each member of right-side wall, can obtain corresponding definite assembling curved channel planform after each member assembling of making is connected.
Brief description of the drawings
Fig. 1 is that three-dimensional structure schematic diagram is looked on a left side of the present invention.
Fig. 2 is that three-dimensional structure schematic diagram is looked on the right side of the present invention.
Fig. 3 be top board overlook three-dimensional structure schematic diagram.
Fig. 4 be top board look up three-dimensional structure schematic diagram.
Fig. 5 is that three-dimensional structure schematic diagram is looked on a left side for right-side wall.
Fig. 6 is that three-dimensional structure schematic diagram is looked on the right side of right-side wall.
Fig. 7 is that top board master looks schematic diagram, R in figure
1for the inwall radius of curvature of top board, t is top plate thickness.
Fig. 8 is that right-side wall master looks schematic diagram, R in figure
2for right-side wall top radius of curvature, R
3for right-side wall bottom radius of curvature.
Fig. 9 is right front bracer three-dimensional structure schematic diagram.
Figure 10 is by the cross-sectional figure of the present invention of traffic capacity Selecting All Parameters.
Figure 11 is that three-dimensional structure schematic diagram is looked on three sections of assembled left sides of the present invention.
Figure 12 is that three-dimensional structure schematic diagram is looked on three sections of assembled right sides of the present invention.
Sequence number in figure: top board 1, left side wall 2, right-side wall 3, base plate 4, left front bracer 5, right front bracer 6, left back bracer 7, right back bracer 8, left front suspension ring 9, right front suspension ring 10, left back suspension ring 11 and right back suspension ring 12, front upper lift ring 13, front lower lift ring 14, rear upper lift ring 15, rear lower lift ring 16, front upper part suspension ring 17, front bottom suspension ring 18, upper back suspension ring 19, rear lower suspension ring 20.
Detailed description of the invention
Below in conjunction with accompanying drawing, by embodiment, the present invention is further described.
Embodiment 1
Referring to Fig. 1 and Fig. 2, a kind of circular thin-wall assembling underground passage comprises top board 1, left side wall 2, right-side wall 3 and base plate 4.Top board 1 is the circular-arc plate of thin-walled evagination, and base plate 4 is dull and stereotyped.Left side wall 2 is identical with right-side wall 3 structures, and top is and the long arc plate of top board 1 smooth transition, and bottom is and the bending short bent plate to the inside of base plate 4 smooth transition.Wall 2 upper ends, left side and right-side wall 3 upper ends are connected to respectively the two ends, left and right of top board 1 by bolt symmetry, wall 2 lower ends, left side and right-side wall 3 lower ends configure respectively the two ends, left and right that are connected to base plate 4 symmetrically, form the standard sections of the assembling underground passage of circular thin-wall sealing.Uniform left front bracer 5 and the left back bracer 7 of being provided with in lateral wall bottom of left side wall 2, same, be laid with right front bracer 6 and right back bracer 8 in right-side wall 3 lateral wall bottoms.On the lateral wall of top board 1, on the arc lateral wall of left side wall 2 and be embedded with respectively the suspension ring of some evaginations on the arc lateral wall of right-side wall 3.
As depicted in figs. 1 and 2, by top board 1, left side wall 2, right-side wall 3, base plate 4, the left front bracer 5 at place before and after wall 2 lateral wall bottoms, left side, the right front bracer 6 at place before and after left back bracer 7 and right-side wall 3 lateral wall bottoms, right back bracer 8 forms the standard sections that the single member of a kind of circular thin-wall assembling of the present invention underground passage structure is assembled into together, described standard knot segment length L is 3 meters, as shown in Figure 11 and Figure 12, press the physical length needs of underground passage, can longitudinally be connected and be assembled into a kind of circular thin-wall assembling underground passage structure of Len req by multiple identical standard sections.
Top board 1, left side wall 2, right-side wall 3 are precast member for reinforcing bar concrete, and these members are transported to on-the-spot installation in factory again after prefabricated completing, and both can exchange use the left side wall 2 that size shape structure is identical and right-side wall 3.
Referring to Fig. 3, Fig. 4 and Fig. 7, the inwall radius of curvature R of the circular-arc top board 1 of thin-walled evagination
1be 1.4 meters, the thickness t of top board 1 is 0.20 meter, and top board 1 lower end, the left and right sides is all projection shape, and at top board 1 outer wall, four jiaos of places are embedded with respectively left front suspension ring 9, right front suspension ring 10, left back suspension ring 11 and right back suspension ring 12.
Referring to Fig. 5, Fig. 6 and Fig. 8, right-side wall 3 top radius of curvature R
2be 1.2 meters, right-side wall 3 bottom radius of curvature R
3it is 0.4 meter; All there is identical inner groovy in left side wall 2 upper ends and right-side wall 3 upper ends, be connected by curved bolt interlock hoop with top board 1 lower end, left and right sides projection respectively; Upper lift ring 13, front lower lift ring 14, rear upper lift ring 15 and rear lower lift ring 16 before four jiaos of places of right-side wall 3 outer wall are embedded with respectively.Also be embedded with respectively the suspension ring of four identical configurations at four jiaos of places of left side wall 2 outer wall, be respectively front upper part suspension ring 17, front bottom suspension ring 18, upper back suspension ring 19 and the rear lower suspension ring 20 of left side wall 2.
Base plate 4 is rectangular-shaped flat board, after top board 1, left side wall 2 and right-side wall 3 install at the scene, then builds at the scene base plate 4, forms overall circular thin-wall assembling underground passage structure.
Referring to Fig. 9, right front bracer 6 is gore, before and after it, two sides is the triangle projective planum being parallel to each other, left and right sides are that top is the connected rectangle plane of acute angle angle, bottom surface is rectangle plane, and rectangle plane four limits of bottom surface are connected with left and right sides rectangle plane bottom with front-rear triangular shape planar base respectively; Left front bracer 5, left back bracer 7, right back bracer 8 are all identical with right front bracer 6 planforms.
Referring to Figure 10, by traffic capacity Selecting All Parameters, top board half central angle of the required standard headway of the present embodiment H=1.25 rice, standard clearance breadth B=2.00 rice and top board 1
α=40 ° time, obtain respectively top board inwall radius R
1=1.4 meters, both side wall top arc radius R of left side wall 2 and right-side wall 3
2=1.2 meters, both side wall bottom arc radius R of left side wall 2 and right-side wall 3
3=0.4 meter.
Referring to Figure 11 and Figure 12, in two figure all for carrying out the longitudinally assembled a kind of circular thin-wall assembling underground passage structure being connected to form by three standard sections by curved bolt, also can base area lower channel actual needs length, be formed by connecting by multiple standard section assemblings.
The construction installation method of a kind of circular thin-wall assembling of the present invention underground passage structure is summarized as follows:
1, roof support with reinforced concrete 1, left side wall 2, right-side wall 3 are transported to erecting bed after prefabricated completing in factory;
2, adopt crane successively all left sides wall accurately to be lifted to precalculated position, and adopt temporary fixed measure, prevent that it from rolling, displacement, after the wall installation of all left sides, adopt longitudinal curved bolt that adjacent two left side walls are coupled together;
3,, after all left sides wall is connected and fixed, from first standard sections, right-side wall 3 is installed, often install after a right-side wall 3, corresponding top board 1 is installed immediately, after top board 1 lower end, left and right sides projection and the 2 upper end groove interlocks of left side wall, is installed and tighten the curved bolt of hoop;
4, after all top boards 1, left side wall 2 and right-side wall 3 installations, build at the scene base plate 4, form overall circular thin-wall assembling underground passage structure;
5, before joint treatment, first sprinkle water surface wettability, inside and outside seam, lateral irrigation enters to mix the cement paste of expansion agent, and cement paste reaches after intensity brushing pitch outside seam again, pastes modified asphalt waterproof coiled material waterstop, realizes waterproofing work;
6, in left side wall 2 lateral wall bottoms, left front bracer 5 and left back bracer 7 are set, to prevent that left side wall 2 from toppling, in right-side wall 3 lateral wall bottoms, right front bracer 6 and right back bracer 8 are set, to prevent that right-side wall 3 from toppling.
Embodiment 2
Standard knot segment length L is 1 meter, top board half central angle of standard headway H=4.00 rice, standard clearance breadth B=4.00 meter and top board 1
α=45 ° time, obtain respectively top board inwall radius R
1=2.8 meters, both side wall top arc radius R of left side wall 2 and right-side wall 3
2=4.0 meters, both side wall bottom arc radius R of left side wall 2 and right-side wall 3
3=1.2 meters, the thickness t of top board 1 is 0.32 meter.
Other structure is with embodiment 1.
Claims (8)
1. a circular thin-wall assembling underground passage, is formed by three above Component compositions, it is characterized in that: described three blocks of above members are top board (1), left side wall (2), right-side wall (3) and base plate (4); Described top board (1) is the circular-arc plate of thin-walled evagination, and base plate (4) is dull and stereotyped; Described left side wall (2) is identical with right-side wall (3) structure, and top is and the long arc plate of top board (1) smooth transition, and bottom is and the bending short bent plate to the inside of base plate (4) smooth transition; Wall (2) upper end, left side and right-side wall (3) upper end are connected to respectively the two ends, left and right of top board (1) by bolt symmetry, wall (2) lower end, left side and right-side wall (3) lower end configure respectively the two ends, left and right that are connected to base plate (4) symmetrically, form the standard sections of the assembling underground passage of circular thin-wall sealing; The lateral wall bottom of described left side wall (2) is laid with left front bracer (5) and left back bracer (7), same, is laid with right front bracer (6) and right back bracer (8) in right-side wall (3) lateral wall bottom; On the lateral wall of top board (1), on the arc lateral wall of left side wall (2) and be embedded with respectively the suspension ring of some evaginations on the arc lateral wall of right-side wall (3).
2. a kind of circular thin-wall assembling underground passage according to claim 1, is characterized in that: the length L of the standard sections of described circular thin-wall assembling underground passage is 3 meters or 1 meter.
3. a kind of circular thin-wall assembling underground passage according to claim 1, it is characterized in that: described top board (1), left side wall (2) and right-side wall (3) are and in factory, after prefabricated completing, are transported to field erected precast member for reinforcing bar concrete again, and both can exchange use the left side wall (2) that size shape structure is identical and right-side wall (3).
4. a kind of circular thin-wall assembling underground passage according to claim 1, is characterized in that: the inwall radius of curvature R of described top board (1)
1be 1.4 meters~2.8 meters, the thickness t of top board (1) is 0.20 meter~0.32 meter.
5. a kind of circular thin-wall assembling underground passage according to claim 1, is characterized in that: the top radius of curvature R of described right-side wall (3)
2be 1.2 meters~4.0 meters, right-side wall (3) bottom radius of curvature R
3it is 0.4 meter~1.2 meters.
6. a kind of circular thin-wall assembling underground passage according to claim 1, it is characterized in that: all there is with the upper end of right-side wall (3) inner groovy that structure is identical the upper end of described left side wall (2), and be connected by curved bolt interlock hoop with the projection of the lower end, two ends, left and right of top board (1) respectively.
7. a kind of circular thin-wall assembling underground passage according to claim 1, is characterized in that: the rectangular-shaped flat board that base plate (4) is cast in situs.
8. a kind of circular thin-wall assembling underground passage according to claim 1, it is characterized in that: right front bracer (6) is gore, its two sides are the triangle projective planum being parallel to each other, its front-back is that top is the connected rectangle plane of acute angle angle, and rectangle plane four limits of bottom surface are connected with the rectangle plane bottom of two sides triangle projective planum bottom and front and back respectively; Left front bracer (5), left back bracer (7), right back bracer (8) are all identical with right front bracer (6) planform.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023006129A3 (en) * | 2022-08-16 | 2023-03-23 | 中铁上海工程局集团有限公司 | Assembly type culvert |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1124320A (en) * | 1994-12-05 | 1996-06-12 | 邓军 | Prefabricated assembly steel reinforced concrete tunnel and tunnel construction technology |
JP2007092356A (en) * | 2005-09-28 | 2007-04-12 | Haneda Concrete Industrial Co Ltd | Tunnel structure having large cross section and its construction method |
JP4080621B2 (en) * | 1998-12-18 | 2008-04-23 | 石川島建材工業株式会社 | Large section tunnel and its construction method |
KR101222524B1 (en) * | 2010-11-11 | 2013-01-15 | 평산에스아이 주식회사 | Precast tunnel structure using corrugated multi plate |
CN103670442A (en) * | 2012-09-04 | 2014-03-26 | 苏国建 | Prefabricated concrete hyperbolical thin-shell arch type assembled underground space engineering supporting structure |
CN203890906U (en) * | 2014-06-17 | 2014-10-22 | 安徽省交通投资集团有限责任公司 | Thin-wall annular assembling type underground passage |
-
2014
- 2014-06-17 CN CN201410267980.1A patent/CN104018437A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1124320A (en) * | 1994-12-05 | 1996-06-12 | 邓军 | Prefabricated assembly steel reinforced concrete tunnel and tunnel construction technology |
JP4080621B2 (en) * | 1998-12-18 | 2008-04-23 | 石川島建材工業株式会社 | Large section tunnel and its construction method |
JP2007092356A (en) * | 2005-09-28 | 2007-04-12 | Haneda Concrete Industrial Co Ltd | Tunnel structure having large cross section and its construction method |
JP4449876B2 (en) * | 2005-09-28 | 2010-04-14 | 羽田コンクリート工業株式会社 | Large-section tunnel structure and its construction method |
KR101222524B1 (en) * | 2010-11-11 | 2013-01-15 | 평산에스아이 주식회사 | Precast tunnel structure using corrugated multi plate |
CN103670442A (en) * | 2012-09-04 | 2014-03-26 | 苏国建 | Prefabricated concrete hyperbolical thin-shell arch type assembled underground space engineering supporting structure |
CN203890906U (en) * | 2014-06-17 | 2014-10-22 | 安徽省交通投资集团有限责任公司 | Thin-wall annular assembling type underground passage |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023006129A3 (en) * | 2022-08-16 | 2023-03-23 | 中铁上海工程局集团有限公司 | Assembly type culvert |
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Application publication date: 20140903 |