CN103924981B - Single-arch large span shallow-depth-excavation tunnel reinforcement system and construction method thereof - Google Patents
Single-arch large span shallow-depth-excavation tunnel reinforcement system and construction method thereof Download PDFInfo
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- CN103924981B CN103924981B CN201410173358.4A CN201410173358A CN103924981B CN 103924981 B CN103924981 B CN 103924981B CN 201410173358 A CN201410173358 A CN 201410173358A CN 103924981 B CN103924981 B CN 103924981B
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Abstract
The present invention relates to a kind of single-arch large span shallow-depth-excavation tunnel reinforcement system and construction method thereof.There is distortion landslide equivalent risk in single-arch large span construction process of shallow buried sub-surface excavated tunnel, consolidation process need be carried out to it.The present invention is the support framework structure in Tunnel, and include the combined steel pipe concrete column of tunnel centerline, patten is fixed in bottom, and preliminary bracing is fixed on top; Patten both sides arrange base plate, fix vertical supporting above base plate; Preliminary bracing is fixed in vertical supporting and skewed horizontal load one end; Preliminary bracing is fixed in horizontal support one end, and the other end is fixed on combined steel pipe concrete column, and is connected firmly with vertical supporting.The present invention is used for the consolidation process that the single-arch large span shallow-depth-excavation tunnel that the accidents such as large deformation, landslide, water burst occur has occurred or has been about to, support and the advantage of fan-shaped support in conjunction with door shape, achieve " become greatly across into little across ", the distortion caused of constructing can be controlled quickly and efficiently.
Description
Technical field
The invention belongs to tunnels and underground engineering technical field, be specifically related to a kind of single-arch large span shallow-depth-excavation tunnel reinforcement system and construction method thereof.
Background technology
Along with subway construction is fast-developing, hidden construction process obtains spatial development, the underground structure pattern of various complexity more and more occurs, and single-arch large span section is as the Typical Representative of shallow buried covered excavation structure, be progressively widely used in the fields such as railway, highway, water conservancy, urban track traffic, city planting ductwork.Particularly in Construction of Urban Rail Traffic, single-arch large span Station, with the architectural style of its many space advantage such as tall and big, spacious, open and uniqueness thereof, becomes first-selected gradually.Consider single-arch large span shallow buried covered excavation structural shape, stress condition, geological conditions, construction level, the impact of management of water equality many factors, large deformation, landslide, water burst equivalent risk is there is in its work progress, consolidation process must be carried out in some cases to it, to give full play to the self-bearing ability of country rock, control the distortion caused of constructing quickly and efficiently, reduce construction risk, to guarantee to construct the normal use of unimpeded, the tunnel structure safety of transport channel and periphery building, and create favorable conditions for subsequent construction.
Summary of the invention
The object of this invention is to provide a kind of single-arch large span shallow-depth-excavation tunnel reinforcement system and construction method thereof, the surrouding rock deformation caused of constructing can be controlled fast, effectively.
The technical solution adopted in the present invention is:
Single-arch large span shallow-depth-excavation tunnel reinforcement system, is characterized in that:
Described reinforcement system is door shape in the preliminary bracing of single-arch large span shallow-depth-excavation tunnel and the fan-shaped support framework structure combined, include the combined steel pipe concrete column of tunnel centerline, the patten that bottom surface, tunnel is arranged is fixed in combined steel pipe concrete column bottom, and preliminary bracing is fixed on top;
The bottom surface, tunnel of patten both sides is provided with base plate, and on base plate, same point is fixed with vertical supporting and skewed horizontal load, the opposite side of skewed horizontal load tendency combined steel pipe concrete column, and preliminary bracing is all fixed in the top of vertical supporting and skewed horizontal load;
Be provided with horizontal support above base plate, preliminary bracing is fixed in horizontal support one end, and the other end is fixed on combined steel pipe concrete column, and is connected firmly with vertical supporting.
The preliminary bracing end of described base plate is provided with the lock foot anchoring stock stretching into rock mass.
Be enclosed with suspension column protection beam above described patten, bottom combined steel pipe concrete column, suspension column protection beam and patten are built and are integrated.
The below of the intersection of described vertical supporting and horizontal support, the both sides of vertical supporting, horizontal support is fixed with longitudinal link of angle steel type.
Anchor pole that stretch into rock mass, that intersect is provided with below described patten.
Described base plate adopts shaped steel and sprayed mortar composition;
Described patten adopts cast-in-situ concrete or combination shaped steel composition;
Described combined steel pipe concrete column adopts seamless steel pipe and form concrete composition;
Described skewed horizontal load, vertical supporting and horizontal support adopt shaped steel or combination shaped steel.
Described cross binding cage construction longitudinally arranges setting along tunnel more, and longitudinal pitch is 1.0 ~ 5.0m;
Lateral separation between described vertical supporting and combined steel pipe concrete column is 3.0 ~ 5.0m;
Difference in height between described base plate and horizontal support is 3.0 ~ 5.0m;
The width of described combined steel pipe concrete column is 0.6 ~ 2.0m
The width of described patten is 1.0 ~ 2.0m, is highly 0.5 ~ 1.0m;
The same patten of described suspension column protection beam width is highly 0.5 ~ 1.0m.
The construction method of single-arch large span shallow-depth-excavation tunnel reinforcement system, is characterized in that:
Realized by following steps:
Step one: build patten:
In the preliminary bracing of single-arch large span shallow-depth-excavation tunnel, clear up empty slag, smooth location is also tamped, and builds patten at the tunnel centerline formwork erection of bottom surface, tunnel;
Step 2: build base plate:
The bottom surface, tunnel of patten both sides is laid type steel support, welded reinforcement mesh sheet, the preliminary bracing structure of type steel support and both sides and patten are connected firmly, and supporting end sets lock foot anchoring stock in the early stage, and type steel support and reinforced mesh build base plate; Type steel support reserves skewed horizontal load and vertical supporting junction steel plate and bolt;
Step 3: build combined steel pipe concrete column and suspension column protection beam:
Combined steel pipe set up by patten, colligation suspension column protection beam steel, formwork erection builds combined steel pipe concrete column and suspension column protection beam; Combined steel pipe reserves horizontal support and connection steel plate and bolt;
Step 4: set up skewed horizontal load and vertical supporting:
Set up skewed horizontal load and vertical supporting, and by between itself and base plate, preliminary bracing by bolt, be welded to connect firmly;
Step 5: set up horizontal support:
Set up horizontal support, and by between itself and skewed horizontal load, vertical supporting, combined steel pipe concrete column, preliminary bracing by bolt, be welded to connect firmly;
Step 6: set up longitudinal link:
Set up longitudinal link, and be connected firmly between itself and vertical supporting, horizontal support.
The present invention has the following advantages:
The present invention is used for the consolidation process that the single-arch large span shallow-depth-excavation tunnel that the accidents such as large deformation, landslide, water burst occur has occurred or has been about to.This structural shape is simple and clear, reasonable stress, give full play to the self-bearing ability of country rock, according to single-arch large span shallow-depth-excavation tunnel structural shape and section loading characteristic, ingeniously utilize the mechanical advantage of shaped steel or Combined steel structure and the inner space of section, support and the advantage of fan-shaped support in conjunction with door shape, achieve " become greatly across into little across ", control the distortion of constructing and causing quickly and efficiently, ensure that the normal use of unimpeded, the tunnel structure safety of construction transport channel and periphery building, and create favorable conditions for subsequent construction; Simultaneously, this structure has very strong operability, can realize factory operation, for strengthening construction gains time, there is higher economic benefit and social benefit, have a wide range of applications in the engineerings such as railway, highway, water conservancy, urban track traffic, city planting ductwork.
Accompanying drawing explanation
Fig. 1 is structure section figure of the present invention.
Fig. 2 is A place enlarged drawing.
In figure, 1-base plate, 2-skewed horizontal load, 3-vertical supporting, 4-patten, 5-combined steel pipe concrete column, 6-suspension column protection beam, 7-horizontal support, the longitudinal link of 8-, 9-lock foot anchoring stock, 10-preliminary bracing, 11-rock mass.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention will be described in detail.
A kind of single-arch large span shallow-depth-excavation tunnel reinforcement system that the present invention relates to, for the support framework structure that the many rows longitudinally arranged in single-arch large span shallow-depth-excavation tunnel preliminary bracing 10, along tunnel are horizontal, adopt door shape and the fan-shaped braced structures combined, guarantee the channels open that construction transport point needs.Support framework structure includes the combined steel pipe concrete column 5 of tunnel centerline, the vertical Force transmission parts of the key for support framework structure, and the patten 4 that bottom surface, tunnel is arranged is fixed in bottom, and preliminary bracing 10 is fixed on top.Patten 4 provides the requirement for bearing capacity needed for combined steel pipe concrete column 5, and is conducive to reinforcement system longitudinal stability to a certain extent.The bottom surface, tunnel of patten 4 both sides is provided with base plate 1, is fixed with vertical supporting 3 above base plate 1, preliminary bracing 10 is fixed on vertical supporting 3 top.Preliminary bracing 10 is fixed in vertical supporting 3 and skewed horizontal load 2 one end; Preliminary bracing 10 is fixed in horizontal support 7 one end, and the other end is fixed on combined steel pipe concrete column 5, and is connected firmly with vertical supporting 3.Skewed horizontal load 2 and vertical supporting 3 respectively and base plate 1, between preliminary bracing by bolt or be welded to connect firmly, as the main vertical Force transmission parts of reinforcement system, and the channel width that transport point of guaranteeing to construct needs.By bolt or be welded to connect firmly between horizontal support 7 and skewed horizontal load 2, vertical supporting 3, combined steel pipe concrete column 5, preliminary bracing, as the main level direction Force transmission parts of reinforcement system, and the channel height that transport point of guaranteeing to construct needs.Combined steel pipe concrete column 5, skewed horizontal load 2 together with vertical supporting 3, preliminary bracing structure is divided into 6 across, realize " become greatly across into little across ", improve preliminary bracing stress.
The preliminary bracing end of base plate 1 is provided with the lock foot anchoring stock 9 stretching into rock mass 11.Be enclosed with suspension column protection beam 6 above patten 4, bottom combined steel pipe concrete column 5, suspension column protection beam 6 is built with patten 4 and is integrated, and guarantees the stable of combined steel pipe concrete column 5, and is conducive to reinforcement system longitudinal stability to a certain extent.The intersection of vertical supporting 3 and horizontal support 7, the both sides of vertical supporting 3, the below of horizontal support 7 are fixed with longitudinal link 8 of angle steel type, for strengthening the connection between horizontal support 7 and vertical supporting 3, and support component is longitudinally integrally connected, guarantee the monolithic stability of reinforcement system.Anchor pole that stretch into rock mass 11, that intersect is provided with below patten 4.
Wherein, base plate 1 adopts shaped steel and sprayed mortar composition, patten 4 adopts cast-in-situ concrete or combination shaped steel composition, and combined steel pipe concrete column 5 adopts seamless steel pipe and form concrete composition, and skewed horizontal load 2, vertical supporting 3 and horizontal support 7 adopt shaped steel or combination shaped steel.
Cross binding cage construction longitudinally arranges setting along tunnel more; longitudinal pitch is 1.0 ~ 5.0m; lateral separation between vertical supporting 3 and combined steel pipe concrete column 5 is 3.0 ~ 5.0m; difference in height between base plate 1 and horizontal support 7 is 3.0 ~ 5.0m; the width of combined steel pipe concrete column 5 is 0.6 ~ 2.0m, and the width of patten 4 is 1.0 ~ 2.0m, is highly 0.5 ~ 1.0m; suspension column protection beam 6 width, with patten 4, is highly 0.5 ~ 1.0m.
Size of the present invention should be of a size of benchmark with constructing tunnel equipment size and cavern excavation generally, and its span length should meet the needs of the normal use of tunnel structure safety and periphery construction of structures.Construction transport channel width, height all should meet the requirement of transport in construction equipment size and hole, and guarantee that passage is smooth-going unobstructed as far as possible; Its width should meet on this basis reserves certain personnel's traveling and access path again.
The present invention adopts shaped steel or combination shaped steel to be assemblied to form, and each parts and preliminary bracing are connected firmly by bolt or welding, backing plate pattern should match with preliminary bracing structure; And support component is longitudinally integrally connected as angle steel, channel-section steel etc. by patten, suspension column protection beam and longitudinal link, guarantee the monolithic stability of reinforcement system.
The present invention can meet the consolidation process of the single-arch large span shallow-depth-excavation tunnel that the accidents such as large deformation, landslide, water burst have occurred.After application the present invention, along with the cross dimensions adopted in concrete engineering, form of construction work, geological conditions, equipment size, the differences such as surrounding enviroment and excavation cavern, its dependency structure parameter all can be either large or small according to actual requirement of engineering, more or less, long or short, strong or weak, as: base plate size, patten, the size of combined steel pipe concrete column and suspension column protection beam and concrete grade, skewed horizontal load, vertical supporting, combined steel pipe concrete column, the model of horizontal support and longitudinal link, material and size, the quantity of braced structures, model, longitudinal pitch and whole height and width etc.
Specific construction process is as follows:
Step one: build patten 4:
In the preliminary bracing of single-arch large span shallow-depth-excavation tunnel, clear up empty slag, smooth location is also tamped, and builds patten 4 at the tunnel centerline formwork erection of bottom surface, tunnel;
Step 2: build base plate 1:
Type steel support, welded reinforcement mesh sheet are laid in the bottom surface, tunnel of patten 4 both sides, the preliminary bracing structure of type steel support and both sides and patten 4 are connected firmly, and supporting end sets lock foot anchoring stock 9 in the early stage, type steel support and reinforced mesh are built base plate 1; Type steel support reserves skewed horizontal load 2 and vertical supporting 3 junction steel plate and bolt;
Step 3: build combined steel pipe concrete column 5 and suspension column protection beam 6:
Combined steel pipe set up by patten 4, colligation suspension column protection beam 6 reinforcing bar, formwork erection builds combined steel pipe concrete column 5 and suspension column protection beam 6; Combined steel pipe reserves horizontal support 7 junction steel plate and bolt;
Step 4: set up skewed horizontal load 2 and vertical supporting 3:
Set up skewed horizontal load 2 and vertical supporting 3, and by between itself and base plate 1, preliminary bracing by bolt, be welded to connect firmly;
Step 5: set up horizontal support 7:
Set up horizontal support 7, and by between itself and skewed horizontal load 2, vertical supporting 3, combined steel pipe concrete column 5, preliminary bracing by bolt, be welded to connect firmly;
Step 6: set up longitudinal link 8:
Set up longitudinal link 8, and be connected firmly between itself and vertical supporting 3, horizontal support 7.
Content of the present invention is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading manual of the present invention to any equivalence that technical solution of the present invention is taked, is claim of the present invention and contains.
Claims (8)
1. single-arch large span shallow-depth-excavation tunnel reinforcement system, is characterized in that:
Described reinforcement system is door shape in single-arch large span shallow-depth-excavation tunnel preliminary bracing (10) and the fan-shaped support framework structure combined, include the combined steel pipe concrete column (5) of tunnel centerline, the patten (4) that bottom surface, tunnel is arranged is fixed in combined steel pipe concrete column (5) bottom, and preliminary bracing (10) is fixed on top;
The bottom surface, tunnel of patten (4) both sides is provided with base plate (1), the upper same point of base plate (1) is fixed with vertical supporting (3) and skewed horizontal load (2), the opposite side of skewed horizontal load (2) tendency combined steel pipe concrete column (5), preliminary bracing (10) is all fixed on the top of vertical supporting (3) and skewed horizontal load (2);
Base plate (1) top is provided with horizontal support (7), and preliminary bracing (10) is fixed in horizontal support (7) one end, and the other end is fixed on combined steel pipe concrete column (5), and is connected firmly with vertical supporting (3).
2. single-arch large span shallow-depth-excavation tunnel reinforcement system according to claim 1, is characterized in that:
The preliminary bracing end of described base plate (1) is provided with the lock foot anchoring stock (9) stretching into rock mass (11).
3. single-arch large span shallow-depth-excavation tunnel reinforcement system according to claim 2, is characterized in that:
Described patten (4) top, combined steel pipe concrete column (5) bottom are enclosed with suspension column protection beam (6), and suspension column protection beam (6) and patten (4) are built and be integrated.
4. single-arch large span shallow-depth-excavation tunnel reinforcement system according to claim 3, is characterized in that:
The intersection of described vertical supporting (3) and horizontal support (7), the both sides of vertical supporting (3), the below of horizontal support (7) are fixed with longitudinal link (8) of angle steel type.
5. single-arch large span shallow-depth-excavation tunnel reinforcement system according to claim 4, is characterized in that:
Described patten (4) below is provided with anchor pole that stretch into rock mass (11), that intersect.
6. single-arch large span shallow-depth-excavation tunnel reinforcement system according to claim 5, is characterized in that:
Described base plate (1) adopts shaped steel and sprayed mortar composition;
Described patten (4) adopts cast-in-situ concrete or combination shaped steel composition;
Described combined steel pipe concrete column (5) adopts seamless steel pipe and form concrete composition;
Described skewed horizontal load (2), vertical supporting (3) and horizontal support (7) adopt shaped steel or combination shaped steel.
7. single-arch large span shallow-depth-excavation tunnel reinforcement system according to claim 6, is characterized in that:
Described support framework structure longitudinally arranges setting along tunnel more, and longitudinal pitch is 1.0 ~ 5.0m;
Lateral separation between described vertical supporting (3) and combined steel pipe concrete column (5) is 3.0 ~ 5.0m;
Difference in height between described base plate (1) and horizontal support (7) is 3.0 ~ 5.0m;
The width of described combined steel pipe concrete column (5) is 0.6 ~ 2.0m
The width of described patten (4) is 1.0 ~ 2.0m, is highly 0.5 ~ 1.0m;
The described suspension column protection same patten of beam (6) width (4) is highly 0.5 ~ 1.0m.
8. the construction method of single-arch large span shallow-depth-excavation tunnel reinforcement system, is characterized in that:
Realized by following steps:
Step one: build patten (4):
In the preliminary bracing of single-arch large span shallow-depth-excavation tunnel, clear up empty slag, smooth location is also tamped, and builds patten (4) at the tunnel centerline formwork erection of bottom surface, tunnel;
Step 2: build base plate (1):
Type steel support, welded reinforcement mesh sheet are laid in the bottom surface, tunnel of patten (4) both sides, the preliminary bracing structure of type steel support and both sides and patten (4) are connected firmly, and supporting end sets lock foot anchoring stock (9) in the early stage, type steel support and reinforced mesh are built base plate (1); Type steel support reserves skewed horizontal load (2) and vertical supporting (3) junction steel plate and bolt;
Step 3: build combined steel pipe concrete column (5) and suspension column protection beam (6):
Combined steel pipe set up by patten (4), colligation suspension column protection beam (6) reinforcing bar, formwork erection builds combined steel pipe concrete column (5) and suspension column protection beam (6); Combined steel pipe reserves horizontal support (7) junction steel plate and bolt;
Step 4: set up skewed horizontal load (2) and vertical supporting (3):
Set up skewed horizontal load (2) and vertical supporting (3), and by between itself and base plate (1), preliminary bracing by bolt, be welded to connect firmly;
Step 5: set up horizontal support (7):
Set up horizontal support (7), and by between itself and skewed horizontal load (2), vertical supporting (3), combined steel pipe concrete column (5), preliminary bracing by bolt, be welded to connect firmly;
Step 6: set up longitudinal link (8):
Set up longitudinal link (8), and itself and vertical supporting (3), horizontal support are connected firmly between (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410173358.4A CN103924981B (en) | 2014-04-28 | 2014-04-28 | Single-arch large span shallow-depth-excavation tunnel reinforcement system and construction method thereof |
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| CN201410173358.4A CN103924981B (en) | 2014-04-28 | 2014-04-28 | Single-arch large span shallow-depth-excavation tunnel reinforcement system and construction method thereof |
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| CN103924981B true CN103924981B (en) | 2016-04-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350545B (en) * | 2015-11-24 | 2017-08-04 | 郑州大学 | A kind of subway foundation pit end well tool-type arch support self-balancing supporting construction |
| CN107023308A (en) * | 2017-05-27 | 2017-08-08 | 中国水利水电第四工程局有限公司 | A kind of hard rock large cross-section tunnel construction supporting structure and construction method |
| CN109113750B (en) * | 2018-10-30 | 2023-08-29 | 中铁第一勘察设计院集团有限公司 | Emergency device for reinforcing failure of shield end and construction method thereof |
| CN111996899B (en) * | 2020-08-04 | 2021-10-22 | 上海市城市建设设计研究总院（集团）有限公司 | Method for building large-span channel in artificial landscape mountain |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155232A (en) * | 2011-04-02 | 2011-08-17 | 中铁二院工程集团有限责任公司 | Construction method of large-span asymmetrical double-arch railway tunnel under terrain bias pressure condition |
| CN203822326U (en) * | 2014-04-28 | 2014-09-10 | 中铁第一勘察设计院集团有限公司 | Reinforcing system for single-arch and large-span type shallowly buried and darkly excavated tunnel |
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- 2014-04-28 CN CN201410173358.4A patent/CN103924981B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155232A (en) * | 2011-04-02 | 2011-08-17 | 中铁二院工程集团有限责任公司 | Construction method of large-span asymmetrical double-arch railway tunnel under terrain bias pressure condition |
| CN203822326U (en) * | 2014-04-28 | 2014-09-10 | 中铁第一勘察设计院集团有限公司 | Reinforcing system for single-arch and large-span type shallowly buried and darkly excavated tunnel |
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