CN104533426A - Method for constructing ultra-shallow buried tunnel under-passing highway by large-span covering excavating method - Google Patents
Method for constructing ultra-shallow buried tunnel under-passing highway by large-span covering excavating method Download PDFInfo
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- CN104533426A CN104533426A CN201410627471.5A CN201410627471A CN104533426A CN 104533426 A CN104533426 A CN 104533426A CN 201410627471 A CN201410627471 A CN 201410627471A CN 104533426 A CN104533426 A CN 104533426A
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000010276 construction Methods 0.000 claims abstract description 27
- 238000009412 basement excavation Methods 0.000 claims description 27
- PYHRZPFZZDCOPH-QXGOIDDHSA-N (S)-amphetamine sulfate Chemical compound [H+].[H+].[O-]S([O-])(=O)=O.C[C@H](N)CC1=CC=CC=C1.C[C@H](N)CC1=CC=CC=C1 PYHRZPFZZDCOPH-QXGOIDDHSA-N 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 description 32
- 238000010586 diagram Methods 0.000 description 5
- 238000009933 burial Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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Abstract
The invention discloses a method for constructing an ultra-shallow buried tunnel under-passing a highway by the large-span covering excavating method. The method comprises the steps of closing part of the pavement of the highway above the tunnel by areas, wherein the unclosed pavement remains normal traffic; constructing enclosing structures at two sides of a main structure of the tunnel below the pavement at the closed area; paving cover plates which are fixedly connected with the enclosing structures on the pavement at the closed area; dispersing vehicles to the top surfaces of the cover plates and recovering the traffic in the closed area; closing the pavements at the rest areas of the down-pass highway; constructing the enclosing structures and the cover plates of the corresponding parts; paving the cover plates on all the pavements; recovering the traffic of the whole pavement; excavating foundation pits from the side surface under the protection of the enclosing structures and the cover plates; constructing the main structure of the tunnel in the foundation pit from bottom to top; then backfilling clearances between the top part of the main structure of the tunnel and the cover plates, so as to finish the tunnel construction. According to the method, the road is occupied for a little time and does not need relocation, so that the construction method is safe and reliable; the tunnel construction generates extremely small influence on the surrounding environment.
Description
Technical field
The present invention relates to tunnels and underground engineering field, refer to that a kind of an ultra shallow buries the method for tunnel construction of underpass of freeways large span cap excavation method particularly, super shallow-buried larger-span underpass of freeways technical problem can be solved, be specially adapted to wear under buried depth is less than the tunnel in footpath, half hole.
Background technology
Due to the fast development of the every building cause of China, various Grade Separation Project gets more and more, and scale is increasing, and the problem that closely connects is more and more outstanding.Particularly, there is the angle of cut more and more less in Railway Tunnel underpass of freeways, and edpth of tunnel is more and more shallow, and due to tunnel cross-section large, the construction period is long, and thus affect speedway scope greatly, the time is long, and security risk is high.
At present, when high-speed railway underpass of freeways, for ensureing the security of operation of speedway, the requirement of freeway management department is more and more higher, tunnel is caused to be arranged more and more difficult, particularly when Railway Tunnel buries underpass of freeways with the little angle of cut, an ultra shallow.
At present, Tunnels in Shallow Buried underpass of freeways mainly contains two kinds of construction methods, and one is shallow burial hidden digging, and one is cut and cover method.Shallow burial hidden digging is that partial excavation face country rock, then applies preliminary bracing in time under advance support protection, and preliminary bracing applies secondary lining after closing again.The advantage of shallow burial hidden digging does not need closed upper portion road; Shortcoming is constructing tunnel narrow space, and partial excavation working procedure is loaded down with trivial details, temporary lining remove time surface settlement control difficulty, and exist landslide risk, constructing tunnel and traffic safety risk all very high.Cut and cover method is excavation pit under non-support or support system protection, then in foundation ditch, applies tunnel agent structure.The advantage of cut and cover method is that speed of application is very fast, and degree of safety is higher; Shortcoming is not suitable for buried depth section significantly, and it is long to take the road time, and pipeline and road need move and change.
Summary of the invention
Object of the present invention is exactly to overcome the deficiency existing for prior art, a kind of an ultra shallow is provided to bury the method for tunnel construction of underpass of freeways large span cap excavation method, the problem current super shallow-buried larger-span underpass of freeways long construction period can be solved well, security risk is high, difficulty of construction is large, grown top highway influence time.
For achieving the above object, an ultra shallow provided by the present invention buries the method for tunnel construction of underpass of freeways large span cap excavation method, comprises the following steps:
1) closed the part road surface of tunnel upper speedway by subregion, do not close road surface and keep vehicle normal pass;
2) under the express highway pavement of closed area, apply the space enclosing structure of agent structure both sides, tunnel, the express highway pavement of closed area is laid the cover plate be fixedly connected with both sides space enclosing structure, dredged by vehicle to the cover plate end face in closed area, the speedway recovering closed area is open to traffic;
3) all the other road surfaces, region of speedway of wearing under closing, apply and the space enclosing structure of closed area corresponding part and cover plate, make down the speedway worn all lay cover plate, recover whole under being open to traffic of express highway pavement of wearing;
4) under the protection of space enclosing structure and cover plate, excavation pit from the side;
5) agent structure of construction tunnel from bottom to up in foundation ditch;
6) finally backfill the space between agent structure top, tunnel and cover plate, thus complete the constructing tunnel that an ultra shallow buries underpass of freeways large span cap excavation method.
Preferably, the express highway pavement worn under described is divided into three regions by the present invention, that is, the double fluid of acrossing highway center line both sides is to region be positioned at the single current of double fluid to both sides, region to region.In step 1) in, first close the double fluid of express highway pavement to region, untight both sides single current keeps normal pass to region; Or first close the both sides single current of express highway pavement to region, untight double fluid keeps normal pass to region.
The present invention is in step 2), 3), 4) in, described space enclosing structure is fixedly connected with by screw with cover plate, forms overall force structure.
The present invention is in step 4) in, set up the first bracing members be fixedly connected with the space enclosing structure of both sides and second bracing members in described foundation ditch.
The present invention is in step 5) in, first bed course is built in the bottom of foundation ditch, above bed course and build the agent structure base plate of band portion side wall between the below of second bracing members, agent structure side wall is built again between the upper end of part side wall and the below of first bracing members, then build agent structure top board above between agent structure side wall, form the agent structure in tunnel.
The present invention is when building agent structure base plate, and set up first support replacement, the two ends of described first support replacement are fixedly connected with part side wall;
When building agent structure side wall, first remove second bracing members, erection second support replacement, the two ends of described second support replacement are fixedly connected with agent structure side wall;
Before building agent structure top board, need first remove first bracing members;
Before backfill space, first need remove first support replacement and second support replacement.
Beneficial effect of the present invention is: do not need all to close express highway pavement, the part express highway pavement of tunnel upper is closed by subregion, do not affect the normal traffic of road, solve traditional cut and cover method to take road time long, road and change technical problems such as moving, reach object economically and reasonably.Adopt digging method construction, soil-baffling structure when space enclosing structure is excavation of foundation pit, cover plate can be highway communication and provides just beam, both ensure that the security reliability of construction stage, also controls distortion and sedimentation, and constructing tunnel is minimum on surrounding enviroment impact.The present invention is according to formation condition, foundation depth, ground settlement requirement, and space enclosing structure can adopt the form such as diaphragm wall, campshed, with strong points.The present invention has short construction period, security risk is low, difficulty of construction is little, affect less on top highway, is specially adapted to wear construction under buried depth is less than the tunnel in footpath, half hole.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention's express highway pavement Region dividing when constructing tunnel.
Fig. 2 is that the present invention applies the space enclosing structure in tunnel and the operation schematic diagram of cover plate.
Fig. 3 is the operation schematic diagram that the present invention sets up bracing members in foundation ditch.
Fig. 4 is the operation schematic diagram that the present invention builds bed course and agent structure base plate.
Fig. 5 is the operation schematic diagram that the present invention builds agent structure side wall.
Fig. 6 is the operation schematic diagram backfilling space after the present invention builds agent structure top board.
Detailed description of the invention
In order to explain the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but they do not form restriction to the present invention.
Embodiment 1
An ultra shallow buries the method for tunnel construction of underpass of freeways large span cap excavation method, comprises the following steps:
1) as shown in Figure 1, by under the express highway pavement 1 worn be divided into three regions, that is, the double fluid of acrossing highway center line 1.4 is to region 1.1 be positioned at the single current of double fluid to both sides, region 1.1 to region 1.2,1.3; First close the double fluid of express highway pavement 1 to region 1.1, untight single current keeps vehicle to be normally open to traffic to region 1.2,1.3;
2) as shown in Figure 2, below express highway pavement in region 1.1, the space enclosing structure 3 of agent structure both sides, tunnel 2 is applied at double fluid, and on region 1.1, lay cover plate 4 at the double fluid of express highway pavement, cover plate 4 is reinforced concrete structure, cover plate 4 is fixedly connected with by screw with both sides space enclosing structure 3, form overall force structure, vehicle is dredged the end face to double fluid to region 1.1 inner cover plate 4, recover the double-current speedway to region 1.1 and be open to traffic;
3) as shown in Figure 1, close the single current of express highway pavement 1 to region 1.2,1.3, repeat step 2), apply with single current to the space enclosing structure 3 of region 1.2,1.3 corresponding part and cover plate 4, make down the speedway 1 worn all lay cover plate 4, recover whole under being open to traffic of express highway pavement 1 of wearing;
4) as shown in Figure 3, under the protection of space enclosing structure 3 and cover plate 4 thereof, slotting excavation pit 14 from the side, and in foundation ditch 14, set up the first bracing members 5 and second bracing members 6 that are fixedly connected with the space enclosing structure 3 of both sides;
5) as shown in Figure 4, be excavated to bottom foundation ditch 14 from top to down, bed course 7 is first built in the bottom of foundation ditch 14, above bed course 7 and build the agent structure base plate 8 of band portion side wall 8.1 between the below of second bracing members 6, and set up first support replacement 9, the two ends of first support replacement 9 are fixedly connected with part side wall 8.1;
As shown in Figure 5, remove second bracing members 6, between the upper end of part side wall 8.1 and the below of first bracing members 5, build agent structure side wall 10, and set up second support replacement 11, the two ends of second support replacement 11 are fixedly connected with agent structure side wall 10;
As shown in Figure 6, remove first bracing members 5, above agent structure side wall 10, build agent structure top board 12, form the agent structure in tunnel 2;
6) first support replacement 9 and second support replacement 11 is removed, finally backfill the space 13 between the agent structure top board 12 in tunnel 2 and cover plate 4, form the supporting and protecting system of tunnel that an ultra shallow buries underpass of freeways large span cap excavation method, thus complete the constructing tunnel that an ultra shallow buries underpass of freeways large span cap excavation method.
Embodiment 2
An ultra shallow buries the method for tunnel construction of underpass of freeways large span cap excavation method, comprises the following steps:
1) as shown in Figure 1, express highway pavement 1 is divided into three regions, that is, the double fluid of acrossing highway center line 1.4 is to region 1.1 be positioned at the single current of double fluid to both sides, region 1.1 to region 1.2,1.3; First close the single current of express highway pavement 1 to region 1.2,1.3, untight double fluid keeps vehicle to be normally open to traffic to region 1.1;
2) as shown in Figure 2, below express highway pavement in region 1.2,1.3, the space enclosing structure 3 of agent structure both sides, tunnel 2 is applied at single current, and on region 1.2,1.3, lay cover plate 4 at the single current of express highway pavement, cover plate 4 is reinforced concrete structure, cover plate 4 is fixedly connected with by screw with both sides space enclosing structure 3, form overall force structure, vehicle is dredged the end face to single current to region 1.2,1.3 inner cover plate 4, recovery single current is open to traffic to the speedway in region 1.2,1.3;
3) as shown in Figure 1, close the double fluid of express highway pavement 1 to region 1.1, repeat step 2), apply with double fluid to the space enclosing structure 3 of region 1.1 corresponding part and cover plate 4, make down the speedway 1 worn all lay cover plate 4, recover whole under being open to traffic of express highway pavement 1 of wearing;
4) as shown in Figure 3, under the protection of space enclosing structure 3 and cover plate 4 thereof, slotting excavation pit 14 from the side, and in foundation ditch 14, set up the first bracing members 5 and second bracing members 6 that are fixedly connected with the space enclosing structure 3 of both sides;
5) as shown in Figure 4, be excavated to bottom foundation ditch 14 from top to down, bed course 7 is first built in the bottom of foundation ditch 14, above bed course 7 and build the agent structure base plate 8 of band portion side wall 8.1 between the below of second bracing members 6, and set up first support replacement 9, the two ends of first support replacement 9 are fixedly connected with part side wall 8.1;
As shown in Figure 5, remove second bracing members 6, between the upper end of part side wall 8.1 and the below of first bracing members 5, build agent structure side wall 10, and set up second support replacement 11, the two ends of second support replacement 11 are fixedly connected with agent structure side wall 10;
As shown in Figure 6, remove first bracing members 5, above agent structure side wall 10, build agent structure top board 12, form the agent structure in tunnel 2;
6) first support replacement 9 and second support replacement 11 is removed, finally backfill the space 13 between the agent structure top board 12 in tunnel 2 and cover plate 4, form the supporting and protecting system of tunnel that an ultra shallow buries underpass of freeways large span cap excavation method, thus complete the constructing tunnel that an ultra shallow buries underpass of freeways large span cap excavation method.
Claims (7)
1. an ultra shallow buries a method for tunnel construction for underpass of freeways large span cap excavation method, it is characterized in that, comprises the following steps:
1) closed the part road surface of top, tunnel (2) speedway by subregion, do not close road surface and keep vehicle normal pass;
2) under the express highway pavement (1) of closed area, apply the space enclosing structure (3) of tunnel (2) agent structure both sides, express highway pavement (1) in closed area above lays the cover plate (4) be fixedly connected with both sides space enclosing structure (3), dredged by vehicle to cover plate (4) end face in closed area, the speedway recovering closed area is open to traffic;
3) all the other road surfaces, region of the speedway (1) worn under closing, apply and the space enclosing structure of closed area corresponding part (3) and cover plate (4), make down the speedway (1) worn all lay cover plate (4), recover whole under being open to traffic of express highway pavement (1) of wearing;
4) under the protection of space enclosing structure (3) and cover plate (4), excavation pit (14) from the side;
5) agent structure of construction tunnel (2) from bottom to up in foundation ditch (14);
6) finally backfill the space between tunnel (2) agent structure top and cover plate (4), thus complete the constructing tunnel that an ultra shallow buries underpass of freeways large span cap excavation method.
2. an ultra shallow according to claim 1 buries the method for tunnel construction of underpass of freeways large span cap excavation method, it is characterized in that: the express highway pavement (1) worn under described is divided into three regions, that is, acrossing highway center line (1.4) both sides double fluid to region (1.1) and be positioned at double fluid to the single current of region (1.1) both sides to region (1.2,1.3).
3. an ultra shallow according to claim 2 buries the method for tunnel construction of underpass of freeways large span cap excavation method, it is characterized in that: step 1) in, first close the double fluid of express highway pavement (1) to region (1.1), untight both sides single current keeps normal pass to region (1.2,1.3); Or first close the both sides single current of express highway pavement (1) to region (1.2,1.3), untight double fluid keeps normal pass to region (1.1).
4. an ultra shallow according to claim 1 buries the method for tunnel construction of underpass of freeways large span cap excavation method, it is characterized in that: step 2), 3), 4) in, described space enclosing structure (3) is fixedly connected with by screw with cover plate (4), forms overall force structure.
5. an ultra shallow according to claim 1 buries the method for tunnel construction of underpass of freeways large span cap excavation method, it is characterized in that: step 4) in, set up the first bracing members (5) be fixedly connected with the space enclosing structure (3) of both sides and second bracing members (6) in described foundation ditch (14).
6. an ultra shallow according to claim 5 buries the method for tunnel construction of underpass of freeways large span cap excavation method, it is characterized in that: step 5) in, bed course (7) is first built in the bottom of foundation ditch (14), the agent structure base plate (8) of band portion side wall (8.1) is built between the top of bed course (7) and the below of second bracing members (6), agent structure side wall (10) is built again between the upper end of part side wall (8.1) and the below of first bracing members (5), then agent structure top board (12) is built in the top between agent structure side wall (10), form the agent structure in tunnel (2).
7. an ultra shallow according to claim 6 buries the method for tunnel construction of underpass of freeways large span cap excavation method, it is characterized in that:
When building agent structure base plate (8), erection first support replacement (9), the two ends of described first support replacement (9) are fixedly connected with part side wall (8.1);
When building agent structure side wall (10), first remove second bracing members (6), erection second support replacement (11), the two ends of described second support replacement (11) are fixedly connected with agent structure side wall (10);
Building, agent structure top board (12) is front, first need remove first bracing members (5);
Front in backfill space (13), first need remove first support replacement (9) and second support replacement (11).
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Cited By (7)
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| CN106368710A (en) * | 2015-07-24 | 2017-02-01 | 中国铁建大桥工程局集团有限公司 | Pavement protection method for super shallow-buried tunnel penetrating through existing road underneath |
| CN110259512A (en) * | 2019-07-15 | 2019-09-20 | 中铁第四勘察设计院集团有限公司 | The recyclable interim hole sealing structure in shield hole |
| CN112411594A (en) * | 2020-10-16 | 2021-02-26 | 中铁工程设计咨询集团有限公司 | Underpass supporting structure for mine-method tunnel in airport area and construction method |
| CN112682045A (en) * | 2020-12-29 | 2021-04-20 | 中铁二院工程集团有限责任公司 | Bearing structure of underground tunnel ultra-shallow buried underpass highway and construction method |
| CN113293798A (en) * | 2021-06-30 | 2021-08-24 | 中铁二院重庆勘察设计研究院有限责任公司 | Construction method of shallow-buried open-cut tunnel penetrating urban road obliquely |
| CN113463646A (en) * | 2021-05-31 | 2021-10-01 | 中铁隧道集团一处有限公司 | Construction method under complex intersection condition of deep and large foundation pit and shallow tunnel |
| CN115217151A (en) * | 2022-07-19 | 2022-10-21 | 中铁第五勘察设计院集团有限公司 | Long-distance downward-penetrating construction method for open-cut tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106368710A (en) * | 2015-07-24 | 2017-02-01 | 中国铁建大桥工程局集团有限公司 | Pavement protection method for super shallow-buried tunnel penetrating through existing road underneath |
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| CN113463646A (en) * | 2021-05-31 | 2021-10-01 | 中铁隧道集团一处有限公司 | Construction method under complex intersection condition of deep and large foundation pit and shallow tunnel |
| CN113293798A (en) * | 2021-06-30 | 2021-08-24 | 中铁二院重庆勘察设计研究院有限责任公司 | Construction method of shallow-buried open-cut tunnel penetrating urban road obliquely |
| CN115217151A (en) * | 2022-07-19 | 2022-10-21 | 中铁第五勘察设计院集团有限公司 | Long-distance downward-penetrating construction method for open-cut tunnel |
| CN115217151B (en) * | 2022-07-19 | 2024-02-06 | 中铁第五勘察设计院集团有限公司 | Long-distance underpass construction method for open cut tunnel |
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| CN104533426B (en) | 2016-09-14 |
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