CN103046579B - A kind of two-way eight track lakebed open cuts secretly bury tunnel structure - Google Patents
A kind of two-way eight track lakebed open cuts secretly bury tunnel structure Download PDFInfo
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- CN103046579B CN103046579B CN201310008774.4A CN201310008774A CN103046579B CN 103046579 B CN103046579 B CN 103046579B CN 201310008774 A CN201310008774 A CN 201310008774A CN 103046579 B CN103046579 B CN 103046579B
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Abstract
The invention discloses a kind of two-way eight track lakebed open cuts and secretly bury tunnel structure, described tunnel structure be comprise tunnels, two, left and right and a middle piping lane three across structure; Described tunnel structure arranges pump house in the minimum point in tunnel, described left and right respectively, arranges rain pump room respectively in the tunnel face in tunnel, described left and right; Described tunnel structure is the general frame primarily of top layer, bottom, mid-board and side wall enclosing, wherein: described top layer comprises the lake water layer, erosion control brush layer, waterproofing course, the first mould that are connected successively and builds reinforced concrete floor and fireprotection layer, described bottom comprises the supercrust, road pavement layer, the second mould that are connected successively and builds reinforced concrete floor, waterproofing course and bed course.Implement two-way eight track lakebed open cuts of the present invention and secretly bury tunnel structure, the lakebed open cut that can realize large span secretly buries tunnel, and the reliable requirement that also can meet engineering economy of structural safety, can reduce the risk of site operation; Speed of application is fast, saves the duration.
Description
Technical field
The present invention relates to field, tunnel, particularly relate to and be a kind ofly applicable to the two-way eight track lakebed open cuts that city expressway passes through lakebed and secretly bury tunnel structure.
Background technology
Due to layout of roads demand and landform restriction, traffic lines inevitably intersect with existing lake sometimes.In order to protect existing lake view, to be that one is more and more welcome pass through lake mode in tunnel.Because city lake level is lower, apply draining behind cofferdam, adopt cut and cover method excavation to be kind of a safety, economy and effective form of construction work.Cut and cover method lake Tunnel maximum is both at home and abroad two-way six-lane at present, and the design of two-way eight track lake Tunnels exists very large technical difficulty and risk.In order to comply with urban development demand, guarantee tunnel structure safety, the cut and cover method eight track lake Tunnel design carrying out safe and reasonable will produce very large economy, society and environmental benefit.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of two-way eight track lakebed open cuts secretly to bury tunnel structure, structural safety also can meet the requirement of engineering economy, can reduce the risk of site operation; Speed of application is fast, saves the duration.
In order to solve the problems of the technologies described above, embodiments provide a kind of two-way eight track lakebed open cuts and secretly burying tunnel structure, described tunnel structure be comprise tunnels, two, left and right and a middle piping lane three across structure;
The minimum point of described tunnel structure respectively in tunnel, described left and right arranges the pump house in order to the fire water in tunnel, left and right described in pump drainage, flushing water and percolating water, and described tunnel structure arranges the rain pump room in order to rainwater in pump drainage open-mouth section in the tunnel face in tunnel, described left and right respectively;
Described tunnel structure is the general frame primarily of top layer, bottom, mid-board and side wall enclosing, wherein: described top layer comprises the lake water layer, erosion control brush layer, waterproofing course, the first mould that are connected successively and builds reinforced concrete floor and fireprotection layer, described bottom comprises the supercrust, road pavement layer, the second mould that are connected successively and builds reinforced concrete floor, waterproofing course and bed course; The cross fall scope of described supercrust is between 1.25%-1.75%; Described top layer comprises top board, and described bottom comprises base plate; According to the difference of top overlay height, the section arrangement of reinforcement of described tunnel structure at least comprises strengthening segment and standard paragraphs; The overcoat thicknesses range of the top layer of described strengthening segment between 3.37m-6.6m, wherein: the described top board of described strengthening segment and the thickness of described base plate are more than or equal to 120cm respectively, and the thickness of described side wall is more than or equal to 100cm; The overburden cover of the top layer of described standard paragraphs is less than 3.37m, wherein: the described top board of described standard paragraphs and the thickness of described base plate are less than or equal to 110cm respectively, and the thickness of described side wall is less than or equal to 90cm.
Preferably, described top board and described base plate comprise first inside the main muscle of hoop and the first outer ring to main muscle, inside described first, the main muscle of hoop and described first outer ring are to the equal diameters of main muscle;
Inside described first the main muscle of hoop and longitudinal pitch from described first outer ring to main muscle not etc.
Preferably, described side wall, described top board and described base plate also comprise second inside the main muscle of hoop and the second outer ring to main muscle, inside described second the main muscle of hoop and diameter from described second outer ring to main muscle not etc.;
Inside described second the main muscle of hoop and longitudinal pitch from described second outer ring to main muscle not etc.
Preferably, described top board comprises lower floor's reinforcing bar, and described base plate comprises top reinforcement, between described lower floor reinforcing bar and described top reinforcement, arrange reinforcing rib.
Preferably, along the horizontally set uplift pile in tunnel, described left and right, described uplift pile and described base plate are rigidly connected.
Preferably, the pile crown reinforcing bar of described uplift pile to stretch in described base plate and curved in 90 °.
Preferably, the corner of described top layer and/or described bottom and described mid-board and/or described side wall arranges to improve the integral anti-shearing of described tunnel structure and the concrete haunch chamfering of anti-bending strength and chamfering reinforcing bar respectively.
Preferably, offer to prevent tunnel, described left and right to stretch because of uneven settlement of foundation and variations in temperature along the longitudinal direction in tunnel, described left and right and cause the deformation joint of concrete cracking.
Implement the two-way eight track lakebed open cuts of the embodiment of the present invention and secretly bury tunnel structure, there is following beneficial effect: because tunnel is primarily of top layer, bottom, the general frame of mid-board and side wall enclosing, wherein: top layer comprises the lake water layer be connected successively, erosion control brush layer, waterproofing course, first mould builds reinforced concrete floor and fireprotection layer, bottom comprises the supercrust be connected successively, road pavement layer, second mould builds reinforced concrete floor, waterproofing course and bed course, while taking into account tunnel intensity, the lakebed open cut that can realize large span secretly buries tunnel, and meet the requirement of engineering economy, the risk of site operation can be reduced, safe and reliable, speed of application is fast, saves the duration.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the cross-sectional configuration schematic diagram that tunnel is secretly buried in the two-way eight track lakebed open cuts of the embodiment of the present invention.
Fig. 2 is the structure fabric muscle schematic diagram that tunnel strengthening segment is secretly buried in the two-way eight track lakebed open cuts of the embodiment of the present invention.
Fig. 3 is the overall structure schematic diagram that tunnel is secretly buried in the two-way eight track lakebed open cuts of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
In conjunction with see, shown in Fig. 1, Fig. 3 (due to symmetrical, Fig. 1 illustrates left-half tunnel, Fig. 3 is that the entirety three in tunnel is across structure), in the present embodiment, two-way eight track lakebed open cuts secretly bury tunnel, comprise two tunnels (tunnel, left side is A) in left and right and the piping lane B in centre three across structure.Wherein:, respectively as up-downgoing tunnel, wherein respectively there are four tracks in tunnel, two, left and right, and middle piping lane B is underground utilities passage.
During concrete enforcement, tunnel is left and right across section clear span 16.45m, in across section clear span 2.2m, section clear height is 5.15.Curb-to-curb width is 14.50m, and clear height is 4.5m.
The road surface cross fall in two tunnels, left and right can be designed as 1.25%, 1.5%, 1.6% or 1.75% equivalence, and namely span is between 1.25%-1.75%, can ensure the best drainage effect in tunnel.
Preferred embodiment, the minimum point of tunnel respectively in tunnel, left and right arranges the pump house (not shown) in order to the fire water in pump drainage tunnel, flushing water and percolating water, can adjust according to the number of the length in tunnel to pump house.
Further, tunnel arranges the rain pump room (not shown) in order to rainwater in pump drainage open-mouth section in the tunnel face in tunnel, left and right respectively.
Further, tunnel arranges blower fan in the inside in tunnel, left and right according to actual needs, in order to strengthen the air flowing in tunnel.Particularly, the location-appropriate that blower fan is being installed in tunnel, left and right is increased, namely the reserved reserved place installing blower fan, such as: the headroom in tunnel, left and right can be increased to 6.1m.Also can adjust according to the number of the length in tunnel to blower fan.
Further, the tunnel of the present embodiment is the general frame primarily of top layer 1, bottom 2, mid-board 3 and side wall 4 enclosing, adopts waterproof concrete to pour into a mould.
Wherein: top layer 1 comprises the lake water layer 11 (degree of depth is between 1.0 ~ 5.0m scope), erosion control brush layer 12 (about 0.5m is thick), waterproofing course 13 (about 0.5m is thick), the first mould that are connected successively and builds reinforced concrete floor 14 and fireprotection layer 15, wherein: containing matcoveredn in waterproofing course 13.
Bottom 2 comprises supercrust 21 connected successively, road pavement layer 22, second mould builds reinforced concrete floor 23, waterproofing course 24 and bed course 25.
The tunnel of this form of structure, while taking into account tunnel intensity, can meet the requirement of engineering economy, can reduce the risk of site operation; Speed of application can be made fast, save the duration.
As shown in Figure 2, for the structure fabric muscle schematic diagram of tunnel strengthening segment is secretly buried in the two-way eight track lakebed open cuts of the embodiment of the present invention.Wherein:
The tunnel of the present embodiment is according to the difference of top layer 1 overburden cover, and the section arrangement of reinforcement of tunnel structure at least comprises strengthening segment and standard paragraphs, that is, uses different cloth muscle structures in strengthening segment and standard paragraphs.Wherein: covering layer comprises lake water layer and soil layer, erosion control brush layer and topping.
Strengthening segment refers to the segment of the overcoat thicknesses range of top layer 1 between 3.37m-6.6m, and standard paragraphs refers to that the overburden cover of top layer 1 is less than the segment of 3.37m.
Further; strengthening segment refers to the segment of thickness between 3.37m-6.6m of the covering layer (lake water layer 11, erosion control brush layer 12, protective layer thickness) of tunnel roof 14, and standard paragraphs refers to that the thickness of the covering layer (lake water layer 11, erosion control brush layer 12 and topping) of tunnel roof 14 is less than the segment of 3.37m.In different segments, for saving construction costs, play optimum frame construction intensity, top layer 1, bottom 2, mid-board 3 and side wall 4 adopt different dimensions.Concrete, top layer comprises top board, bottom base plate, and the top board of strengthening segment and the thickness of base plate are more than or equal to 120cm respectively, and the thickness of side wall is more than or equal to 100cm;
The top board of standard paragraphs and the thickness of base plate are less than or equal to 110cm respectively, and the thickness of side wall is less than or equal to 90cm.
Preferably, in the embodiment of above-mentioned installation blower fan, the structure of fan section is similar to the structure of strengthening segment, repeats no more herein.
Further, top board and described base plate comprise first inside the main muscle of hoop 117 and the first outer ring to main muscle 115, inside first, the main muscle of hoop 117 and the first outer ring are to the equal diameters of main muscle 115, all adopt diameter to be the screw-thread steel of 28mm.Inside first, the longitudinal pitch of the main muscle 117 of hoop is set to 10cm, and the first outer ring is set to 20cm to the longitudinal pitch of main muscle.
Further, side wall 4, top board and base plate comprise second inside the main muscle of hoop 416 and the second outer ring to main muscle 417, inside second, the diameter of the main muscle of hoop is set to 25mm, and the second outer ring is to the diameter 28mm of main muscle (being inside span centre and support outer reinforcing rib); Inside second, the longitudinal pitch of the main muscle 416 of hoop is set to 50cm, and the second outer ring is set to 10cm to the longitudinal pitch of main muscle 417.
Be understandable that: inside second, the main muscle of hoop and the second outer ring can be determined according to the calculating area of reinforcement to the diameter of main muscle.
Preferably, inside above-mentioned first the main muscle of hoop 117, first outer ring to the main muscle of hoop 416, second outer ring inside main muscle 115, second inside main muscle 417, the 3rd the main muscle of hoop and the 3rd outer ring adopt screw-thread steel material to make to main muscle 318, in addition, the present embodiment is also provided with the stirrup using screw-thread steel material to make.
Preferably, the tunnel of the present embodiment also comprises stirrup 524, and 525 and longitudinal structure reinforcing bar 522,526, wherein, stirrup 524,525 adopt light plane materiel material to make.
Preferably, in order to provide the flexural strength of concrete structure, in line with the object of saving engineering cost, top board arranges lower floor's reinforcing bar, and base plate arranges top reinforcement, between lower floor's reinforcing bar and top reinforcement, arrange reinforcing rib.
Particularly, diameter and the longitudinal pitch of reinforcing rib are respectively: left and right is 32mm across top board lower floor reinforcing rib 619 diameter, and longitudinal pitch is 20cm; Left and right is 25mm across the diameter of base plate upper strata reinforcing rib 618, and longitudinal pitch is 20cm; In across and both sides certain limit in the diameter of top board upper strata reinforcing rib 620 be 32mm, longitudinal pitch is 10cm; In across and base plate lower floor reinforcing rib 621 diameter of both sides certain limit be 25mm, longitudinal pitch is 10cm.
Preferably, the corner of top layer 1 and bottom 2 and mid-board 3 and described side wall 4 arranges to improve the integral anti-shearing of described tunnel structure and the concrete haunch chamfering of anti-bending strength and chamfering reinforcing bar respectively.Concrete, in order to improve the connection of different parts reinforcing bar, angle muscle 723 being set at structural corners place, improving structure stress situation.Wherein, angle muscle 723 can be arranged on the corner of top layer and/or bottom and mid-board 3, and angle muscle 723 also can be arranged on the corner of top layer and/or bottom and side wall 4.
Standard paragraphs and strengthening segment to the different requirement of tunnel structure intensity mainly through arranging different modal circumferential stiffening ribs to meet.At standard paragraphs, except the main muscle of hoop 416 inside side wall 4 is different, the main muscle of other hoops is substantially the same with strengthening segment.At standard paragraphs, inside side wall 4, the diameter of the main muscle of hoop is 28mm, and longitudinal pitch is 20cm.
Similarly, in order to provide the flexural strength of concrete structure, in line with the object of saving engineering cost, top board arranges lower floor's reinforcing bar, and base plate arranges top reinforcement, between lower floor's reinforcing bar and top reinforcement, arrange reinforcing rib.Diameter and the longitudinal pitch of reinforcing rib are respectively: left and right is 25mm across top board lower floor reinforcing rib diameter, and longitudinal pitch is 20cm; Left and right is 22mm across base plate upper strata reinforcing rib diameter, and longitudinal pitch is 20cm; In across and both sides certain limit in top board upper strata reinforcing rib diameter be 28mm, longitudinal pitch is 10cm; In across and the base plate lower floor reinforcing rib diameter of both sides certain limit be 28mm, longitudinal pitch is 20cm.
Preferably, in order to prevent tunnel from causing concrete cracking because stretching because of uneven settlement of foundation and variations in temperature, longitudinally arrange one deformation joint every 50-70m along tunnel, deformation joint width is 30mm.
In the present embodiment, the anti-floating performance of tunnel structure is met by the bored pile arranging diameter 800mm in substrate.
Preferably, uplift pile, along tunnel longitudinal pitch 10m, avoids above-mentioned deformation joint, section variation place and base plate local subsidence formula groove place; On tunnel lateral direction, 5 uplift piles are set, lay respectively in the middle of base plate two ends, base plate and 10m place in the middle of distance base plate.Uplift pile pile crown reinforcing bar is stretched into 700mm in base plate, and curved in 90 °, together with uplift pile just having been received with base plate by concreting, reach resistance to plucking effect.
Preferably, uplift pile uses underwater concrete to pour into a mould.
Implement two-way eight track lakebed open cuts of the present invention and secretly bury tunnel structure, there is following beneficial effect, because tunnel is primarily of top layer, bottom, the general frame of mid-board and side wall enclosing, wherein: top layer comprises the lake water layer be connected successively, erosion control brush layer, waterproofing course, first mould builds reinforced concrete floor and fireprotection layer, bottom comprises the supercrust be connected successively, road pavement layer, second mould builds reinforced concrete floor, waterproofing course and bed course, while taking into account tunnel intensity, the lakebed open cut that can realize large span secretly buries tunnel, and meet the requirement of engineering economy, the risk of site operation can be reduced, safe and reliable, speed of application is fast, saves the duration.
Above disclosedly be only a kind of preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (8)
1. two-way eight track lakebed open cuts secretly bury a tunnel structure, it is characterized in that, described tunnel structure be comprise two tunnels, left and right and a middle piping lane three across structure;
The minimum point of described tunnel structure respectively in tunnel, described left and right arranges the pump house in order to the fire water in tunnel, left and right described in pump drainage, flushing water and percolating water, and described tunnel structure arranges the rain pump room in order to rainwater in pump drainage open-mouth section in the tunnel face in tunnel, described left and right respectively;
Described tunnel structure is the general frame primarily of top layer, bottom, mid-board and side wall enclosing, wherein: described top layer comprises the lake water layer, erosion control brush layer, waterproofing course, the first mould that are connected successively and builds reinforced concrete floor and fireprotection layer, described bottom comprises the supercrust, road pavement layer, the second mould that are connected successively and builds reinforced concrete floor, waterproofing course and bed course;
The cross fall scope of described supercrust is between 1.25%-1.75%;
Described top layer comprises top board, and described bottom comprises base plate; According to the difference of top overlay height, the section arrangement of reinforcement of described tunnel structure at least comprises strengthening segment and standard paragraphs;
The overcoat thicknesses range of the top layer of described strengthening segment between 3.37m-6.6m, wherein: the described top board of described strengthening segment and the thickness of described base plate are more than or equal to 120cm respectively, and the thickness of described side wall is more than or equal to 100cm;
The overburden cover of the top layer of described standard paragraphs is less than 3.37m, wherein: the described top board of described standard paragraphs and the thickness of described base plate are less than or equal to 110cm respectively, and the thickness of described side wall is less than or equal to 90cm.
2. tunnel structure as claimed in claim 1, is characterized in that, described top board and described base plate comprise first inside the main muscle of hoop and the first outer ring to main muscle, inside described first, the main muscle of hoop and described first outer ring are to the equal diameters of main muscle;
Inside described first the main muscle of hoop and longitudinal pitch from described first outer ring to main muscle not etc.
3. tunnel structure as claimed in claim 2, it is characterized in that, described side wall, described top board and described base plate also comprise second inside the main muscle of hoop and the second outer ring to main muscle, inside described second the main muscle of hoop and diameter from described second outer ring to main muscle not etc.;
Inside described second the main muscle of hoop and longitudinal pitch from described second outer ring to main muscle not etc.
4. tunnel structure as claimed in claim 1, it is characterized in that, described top board comprises lower floor's reinforcing bar, and described base plate comprises top reinforcement, between described lower floor reinforcing bar and described top reinforcement, arrange reinforcing rib.
5. tunnel structure as claimed in claim 4, it is characterized in that, along the horizontally set uplift pile in tunnel, described left and right, described uplift pile and described base plate are rigidly connected.
6. tunnel structure as claimed in claim 5, is characterized in that, the pile crown reinforcing bar of described uplift pile to stretch in described base plate and curved in 90 °.
7. tunnel structure as claimed in claim 1, it is characterized in that, the corner of described top layer and/or described bottom and described mid-board and/or described side wall arranges to improve the integral anti-shearing of described tunnel structure and the concrete haunch chamfering of anti-bending strength and chamfering reinforcing bar respectively.
8. tunnel structure as claimed in claim 1, it is characterized in that, the longitudinal direction along tunnel, described left and right is offered to prevent tunnel, described left and right from stretching because of uneven settlement of foundation and variations in temperature and is caused the deformation joint of concrete cracking.
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CN103343549A (en) * | 2013-07-15 | 2013-10-09 | 杨平 | Tunnel open excavation section deep foundation pit and design method |
CN105804116B (en) * | 2016-04-01 | 2018-11-20 | 上海市政工程设计研究总院(集团)有限公司 | The genuine section structure built jointly with pipe gallery is worn under a kind of |
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CN108547631B (en) * | 2018-05-22 | 2024-05-07 | 中国电建集团中南勘测设计研究院有限公司 | Tunnel |
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CN113431088A (en) * | 2020-06-18 | 2021-09-24 | 诸暨市仪达环保设备有限公司 | Open cut riverbed type river-crossing tunnel |
CN113338337A (en) * | 2021-06-11 | 2021-09-03 | 中铁三局集团广东建设工程有限公司 | Top open type tunnel |
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