CN102943678B - Arched subway station old and new building connection structure and construction method - Google Patents
Arched subway station old and new building connection structure and construction method Download PDFInfo
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Abstract
The invention relates to an arched subway station old and new building connection structure and a construction method. A profile steel pull rod is made of profile steel and divided into two sections which are connected, and a gap is reserved in the middle of the profile steel pull rod and is provided with a bolt fastening mechanism. A plurality of groups of chemical screws are oppositely arranged on the inner side of a bottom girder of an arched ceiling arranged in the range of an opening disposed on the lateral wall of an existing station, a plurality of profile steel pull rods with two ends respectively fixedly provided with wedge-shaped steel plates are fixedly connected with the corresponding chemical screws through the wedge-shaped steel plates, and the profile steel pull rods are connected between the bottom girders arranged on two sides of the arched ceilings and are fixed. The construction method is characterized in that firstly the profile steel pull rods are adopted to exert tensioning force on arched angle portions in advance, then a newly built structure is adopted to reinforce the supporting ceilings, and finally the old structure is demounted in segmented mode. Operation is easy, construction procedure is simple, and control on deformation and internal force conversion of the existing structure is benefited.
Description
Technical field
The present invention relates to subway engineering field, mainly for subway engineering is not the transfer station built the same period, comprise the station of passage transfer and main body transfer, namely need the engineering punched on the side wall of building up station, particularly for the arch station of boring construction.
Background technology
Along with socioeconomic development, Modern Traffic congested problem becomes increasingly conspicuous, and building underground railway has become one of the effective way solving this problem, and subway station is the important ingredient of city underground.For Beijing, according to statistics: 2010, the circuit building and building, wherein transfer node just has 57, and in the year two thousand fifty Beijing urban mass transit layout of roads figure, node station needs the number realizing transfer up to 118.The transfer of the old and new's subway line must relate to the linking of new and old structure, as being connected of the newly-built transfer Room and building up station station hall layer, newly-built transferring passage are connected with building up station station layer.In this type of engineering construction, existing subway is as lifeline engineering, very strict to the Control Indexes in Construction of new construction, if do not adopted enough measures and methods, will produce totally unfavorable social influence.The tunneling arch station, underground of particularly extensively implementing at present is generally buried underground darker, very large vertical load and horizontal thrust are born in arch angular position, if it is unreasonable to abolish scheme to old structure, to both wired station structure damage can be very large, as the place of abolishing produces, a large amount of connectivity crack, percolating water are serious, depression of bearing force, durability do not meet the demands, these building up station structural damages are all irreversible, should belong to engineering accident category.
Summary of the invention
The object of this invention is to provide a kind of arch subway station new and old building connected structure and construction method, first adopt shaped steel pull bar to the mode of arch angular position pre-add stretching force, then utilize newly-built structure to reinforce support top, old structure is abolished in last segmentation; It is easy to operation, working procedure is simple, the conversion of control existing structure deformation and internal stresses is all highly beneficial.
The object of the invention is to be achieved by the following technical programs:
A kind of arch subway station new and old building connected structure, the building up station of A line is connected with the newly-built station of B line and forms transfer station, the side wall of A line building up station punches mouth, form the passway communicated with the newly-built station of B line, it comprises: hole, arch top bottom girder, shaped steel pull bar, chemical screw rod, wedge-shaped steel plate, and described shaped steel pull bar is the rod member that shaped steel is made, and it is divided into two joints to connect, middle preset clearance, and be provided with bolton mechanism; The inner side of the arch top bottom girder of mouthful scope that building up station side wall punches is oppositely arranged the chemical screw rod of many groups, the shaped steel pull bar that some two ends are fixed with wedge-shaped steel plate is fixedly connected with corresponding chemical screw rod through wedge-shaped steel plate, fixing between the arch top bottom girder that shaped steel pull bar is connected to both sides, arch top; The outer face of wedge-shaped steel plate is close with arch top bottom girder medial surface shape.
It also comprises: reinforcement ring beam, chemically-planted steel bar; Cast-in-place reinforcement ring beam outside the arch top bottom girder of hole scope and between newly-built structure, arch top bottom girder is fixedly connected with chemically-planted steel bar with between reinforcement ring beam, and reinforcement ring beam forms closed-loop ellbeam along edge, hole in newly-built structure.It also comprises: back-up coat at the bottom of beam, after mouth that the side wall of A line building up station punches, under bottom girder bottom surface, arch top, arranges back-up coat at the bottom of reinforced concrete beam, is combined into one with bottom girder bottom surface, arch top.It also comprises: reinforcement post, described hole is two rectangle holes, the side wall of building up station retains one section of side wall between two rectangle holes, and build reinforced concrete pile to the subsides of direction, newly-built station, the upper and lower two ends of reinforced concrete pile connect with reinforcement ring beam, and the side wall that this section retains and subsides are built reinforced concrete pile and are combined into one and form reinforcement post.Described bolton mechanism is, save at shaped steel pull bar two two end faces connected and be connected with steel plate all respectively, steel plate is provided with connecting hole accordingly, with bolt through connecting hole, then uses fastening nuts compression clearance.Back-up coat side at the bottom of described reinforcement ring beam and beam connects to building and is integrated, common support arch top bottom girder.
The construction method that a kind of arch subway station new and old building is connected, after shaped steel pull bar two ends are fixing, apply pretension with bolton mechanism compression clearance, shaped steel pull bar applies pulling force to arch top bottom girder in advance, and in advance on lateral branch top, adopt the preliminary bracing support top existing structure of newly-built structure; Then under the protection of shaped steel pull bar and top support structure, segmentation is abolished building up station and to be punched the side wall of port area; Mouth to be punched, reinforcing, reinforced structure are constructed complete, finally remove scaffold and shaped steel pull bar, and during by scaffold erection temporary support, scaffold is arranged on back-up coat at the bottom of brace summer below back-up coat at the bottom of beam.
Described segmentation is abolished building up station and to be punched the side wall of port area, comprises the following steps:
Step one: carry out temporary plugging to both wired station transfer sections, transforms both wired transfer section furred ceiling upper pipeline, performs vault foot shaped steel pull bar; Hold out against with A line abutment wall outside the preliminary bracing at B line station and Second Lining Construction to A line abutment wall;
Step 2: compartment of terrain divides several districts on side wall, cut the interior outside concrete cover of I district's side wall, the reserved steel bar needed for stripping, cuts the concrete in Ith district successively according to cutting order;
Step 3: perform back-up coat at the bottom of the beam of existing arch top bottom girder within the scope of Ith district; Set up temporary supporting system with scaffold, build reinforcement post, and firm with newly-built structure anchoring;
Step 4: after I structure reaches design strength, cut the interior outside concrete cover of II district's side wall, the reserved steel bar needed for stripping, cuts the concrete in IIth district successively according to cutting order;
Step 5: the temporary support retaining Ith district; Perform back-up coat at the bottom of the beam of existing arch top bottom girder within the scope of IIth district, and set up the temporary support in IIth district with scaffold;
Step 6: after II plot structure reaches design strength, with the 4th, the 5th step, successively IIIth district is punched and perform existing arch top bottom girder beam at the bottom of back-up coat;
Step 7: the temporary support retaining each district, with the sequence of construction in other districts, dig IV and V district both wired sidewall structures successively, reinforce existing arch top bottom girder on request, wherein the concrete of A line abutment wall cuts into the size that can carry by diamond rope saw static force piecemeal;
Step 8: treat that tunneling segment structure Second Lining Construction is complete, after concrete structure reaches design strength, removes temporary support.
The present invention has following advantage and good effect:
(1) rigidity of shaped steel pull bar is large, can retrain the distortion of building up station well;
(2) first reinforce support top existing structure, guarantee to abolish pre-structure rigidity much larger than designing requirement;
(3) staged and layered abolishes existing structure, makes existing structure internal force change substep conversion;
(4) owing to adopting static(al) to abolish scheme, noise pollution is little;
(5) Scheme of Strengthening is ripe, and construction tool and site requirements not high, little to both wired Influence to operation.
Adopt shaped steel pull bar to apply pulling force in advance, then under the protection of shaped steel pull bar, segmentation is abolished and construction reinforcement structure, utilizes shaped steel pull bar to apply pulling force and to punch caused displacement to overcome structure; Utilize static(al) cutting scheme, noise is little, and dust pollution is little, utilizes environmental protection and civilization, green construction.
Experiment proves: namely the present invention adopts the pretension of shaped steel pull bar, then segmentation under pull bar protection; substep is abolished and the mode of reinforcing both make use of that shaped steel pull bar rigidity is large, controlling distortion good, be easy to advantage of constructing fully; make use of again static(al), to abolish scheme noise little; positioning precision is high; little advantage is affected on surrounding enviroment; bar planting is again a kind of reinforcing technique of maturation, can reduce engineering risk significantly.Transformation and the extension project of metro transfer station can be widely used in.
Accompanying drawing explanation
Fig. 1 is ruggedized construction elevational schematic view of the present invention;
Fig. 2 is construction way elevational schematic view of the present invention;
Fig. 3 newly-built structure and existing structure graph of a relation;
Fig. 4 is the A-A part sectioned view of Fig. 2;
Fig. 5 is the bolton mechanism enlarged drawing in the middle of shaped steel pull bar 5;
Fig. 6 is the B-B part sectioned view of Fig. 2;
Fig. 7 is list hole of the present invention structural facades schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Drawing reference numeral: wall reinforcing bar 15 in wall 14, existing structure in wall reinforcing bar 13, existing structure in wall 12, new construction in back-up coat 3, reinforcement post 4, shaped steel pull bar 5, chemical screw rod 6, wedge-shaped steel plate 7, reinforcement ring beam 8, chemically-planted steel bar 9, scaffold 10, bolton mechanism 11, new construction at the bottom of hole 1, arch top bottom girder 2, beam.
A kind of arch subway station new and old building connected structure, the building up station of A line is connected with the newly-built station of B line and forms transfer station, the side wall of A line building up station punches mouth, form the passway communicated with the newly-built station of B line, it comprises: hole 1, arch top bottom girder 2, shaped steel pull bar 5, chemical screw rod 6, wedge-shaped steel plate 7, the rod member that described shaped steel pull bar 5 is made for shaped steel, and it is divided into two joints to connect, middle preset clearance, and be provided with bolton mechanism 11; The inner side of the arch top bottom girder 2 of mouth 1 scope that building up station side wall punches is oppositely arranged the chemical screw rod 6 of many groups, the shaped steel pull bar 5 that some two ends are fixed with wedge-shaped steel plate 7 is fixedly connected with corresponding chemical screw rod 6 through wedge-shaped steel plate 7, fixing between the arch top bottom girder 2 that shaped steel pull bar 5 is connected to both sides, arch top; The outer face of wedge-shaped steel plate 7 is close with arch top bottom girder 2 medial surface shape.
It also comprises: reinforcement ring beam 8, chemically-planted steel bar 9; Cast-in-place reinforcement ring beam 8 outside the arch top bottom girder 2 of hole 1 scope and between newly-built structure, arch top bottom girder 2 is fixedly connected with chemically-planted steel bar 9 with between reinforcement ring beam 8, and reinforcement ring beam 8 forms closed-loop ellbeam along edge, hole 1 in newly-built structure.It also comprises: the side wall of back-up coat 3, A line building up station at the bottom of beam punches after mouth 1, under bottom girder 2 bottom surface, arch top, arrange back-up coat 3 at the bottom of reinforced concrete beam, be combined into one with bottom girder 2 bottom surface, arch top.It also comprises: reinforcement post 4, described hole 1 is two rectangle holes, the side wall of building up station retains one section of side wall between two rectangle holes, and build reinforced concrete pile to the subsides of direction, newly-built station, the upper and lower two ends of reinforced concrete pile connect with reinforcement ring beam 8, and the side wall that this section retains and subsides are built reinforced concrete pile and are combined into one and form reinforcement post 4.Described bolton mechanism 11 is, two end faces connected at shaped steel pull bar 5 liang of joints are connected with steel plate all respectively, and steel plate is provided with connecting hole accordingly, with bolt through connecting hole, then uses fastening nuts compression clearance.Back-up coat 3 side at the bottom of described reinforcement ring beam 8 and beam connects to building and is integrated, common support arch top bottom girder 2.
The construction method that a kind of arch subway station new and old building is connected, after shaped steel pull bar 5 two ends are fixing, pretension is applied with bolton mechanism 11 compression clearance, shaped steel pull bar 5 applies pulling force to arch top bottom girder 2 in advance, and in advance on lateral branch top, adopt the preliminary bracing support top existing structure of newly-built structure; Then under the protection of shaped steel pull bar 5 and top support structure, segmentation is abolished building up station and to be punched the side wall in mouth 1 region; Mouth 1 to be punched, reinforcing, reinforced structure are constructed complete, finally remove scaffold 10 and shaped steel pull bar 5, and when setting up temporary support with scaffold 10, scaffold 10 is arranged on the back-up coat 3 at the bottom of brace summer below of back-up coat 3 at the bottom of beam.
As shown in the figure, as follows below in conjunction with concrete engineering experimental project:
Certain station is the transfer station of A line, B line two circuits, and wherein A line part is building up station, has runed 3 years, separated island platform station, station structure is double-deck single span arch hidden digging structure, and B line part is newly-built station, transfer node scope individual layer twin spans flat top wall hidden digging structure.Two stand in this cross change and ride, and the station layer of B line is just wearing the station hall layer of A line, need on the side wall of A line, abolish twin spans individual layer hole.
Described segmentation is abolished building up station and to be punched the side wall in mouth 1 region, comprises the following steps:
Step one: carry out temporary plugging to both wired station transfer sections, transforms both wired transfer section furred ceiling upper pipeline, performs vault foot shaped steel pull bar 5; Hold out against with A line abutment wall outside the preliminary bracing at B line station and Second Lining Construction to A line abutment wall;
Step 2: compartment of terrain divides several districts on side wall, cut the interior outside concrete cover of I district's side wall, the reserved steel bar needed for stripping, cuts the concrete in Ith district successively according to cutting order;
Step 3: perform back-up coat 3 at the bottom of the beam of existing arch top bottom girder 2 within the scope of Ith district; Set up temporary supporting system with scaffold 10, build reinforcement post 4, and firm with newly-built structure anchoring;
Step 4: after I structure reaches design strength, cut the interior outside concrete cover of II district's side wall, the reserved steel bar needed for stripping, cuts the concrete in IIth district successively according to cutting order;
Step 5: the temporary support retaining Ith district; Perform back-up coat 3 at the bottom of the beam of existing arch top bottom girder 2 within the scope of IIth district, and set up the temporary support in IIth district with scaffold 10;
Step 6: after II plot structure reaches design strength, with the 4th, the 5th step, successively IIIth district is punched and perform existing arch top bottom girder 2 beam at the bottom of back-up coat 3;
Step 7: the temporary support retaining each district, with the sequence of construction in other districts, dig IV and V district both wired sidewall structures successively, reinforce existing arch top bottom girder 2 on request, wherein the concrete of A line abutment wall cuts into the size that can carry by diamond rope saw static force piecemeal;
Step 8: treat that tunneling segment structure Second Lining Construction is complete, after concrete structure reaches design strength, removes temporary support.
In Fig. 3, dotted line represents existing structure.
If the scope of punching is single hole, then the scope of punching is divided into two pieces, left and right, carries out reinforcing, abolishing and pouring structure according to step above.
Claims (7)
1. an arch subway station new and old building connected structure, the building up station of A line is connected with the newly-built station of B line and forms transfer station, the side wall of A line building up station punches mouth, form the passway communicated with the newly-built station of B line, it comprises: hole (1), arch top bottom girder (2), shaped steel pull bar (5), chemistry screw rod (6), wedge-shaped steel plate (7), reinforcement ring beam (8), chemically-planted steel bar (9), it is characterized in that: the rod member that described shaped steel pull bar (5) is made for shaped steel, it is divided into two joints to connect, middle preset clearance, and be provided with bolton mechanism (11), the inner side on arch top bottom girder (2) of mouth (1) scope that building up station side wall punches is oppositely arranged the chemical screw rod of many groups (6), the shaped steel pull bar (5) that some two ends are fixed with wedge-shaped steel plate (7) is fixedly connected with corresponding chemical screw rod (6) through wedge-shaped steel plate (7), fixing between arch top bottom girder (2) that shaped steel pull bar (5) is connected to both sides, arch top, the outer face of wedge-shaped steel plate (7) is close with arch top bottom girder (2) medial surface shape, cast-in-place reinforcement ring beam (8) between outside, arch top bottom girder (2) of hole (1) scope and newly-built structure, be fixedly connected with chemically-planted steel bar (9) between arch top bottom girder (2) with reinforcement ring beam (8), reinforcement ring beam (8) forms closed-loop ellbeam along hole (1) edge in newly-built structure.
2. arch subway station according to claim 1 new and old building connected structure, it is characterized in that: it also comprises: back-up coat at the bottom of beam (3), the side wall of A line building up station punch after mouth (1), back-up coat at the bottom of reinforced concrete beam (3) is set under bottom girder (2) bottom surface, arch top, is combined into one with bottom girder (2) bottom surface, arch top.
3. arch subway station according to claim 1 new and old building connected structure, it is characterized in that: it also comprises: reinforcement post (4), described hole (1) is two rectangle holes, the side wall of building up station retains one section of side wall between two rectangle holes, and build reinforced concrete pile to the subsides of direction, newly-built station, the upper and lower two ends of reinforced concrete pile connect with reinforcement ring beam (8), and the side wall that this section retains and subsides are built reinforced concrete pile and are combined into one and form reinforcement post (4).
4. arch subway station according to claim 1 new and old building connected structure, it is characterized in that: described bolton mechanism (11) is, save at shaped steel pull bar (5) two two end faces connected and be connected with steel plate all respectively, steel plate is provided with connecting hole accordingly, with bolt through connecting hole, then use fastening nuts compression clearance.
5. arch subway station according to claim 2 new and old building connected structure, it is characterized in that: back-up coat (3) side at the bottom of described reinforcement ring beam (8) and beam connects to building and is integrated, common support arch top bottom girder (2).
6. a claim 1,2,3, the construction method of 4 one of any described arch subway station new and old building connected structures, it is characterized in that: after shaped steel pull bar (5) two ends are fixing, pretension is applied with bolton mechanism (11) compression clearance, shaped steel pull bar (5) applies pulling force to arch top bottom girder (2) in advance, and in advance on lateral branch top, adopt the preliminary bracing support top existing structure of newly-built structure; Then under the protection of shaped steel pull bar (5) and top support structure, segmentation is abolished building up station and to be punched the side wall in mouth (1) region; Mouth to be punched (1), reinforcing, reinforced structure are constructed complete, finally remove scaffold (10) and shaped steel pull bar (5), during by scaffold (10) erection temporary support, scaffold (10) is arranged on back-up coat at the bottom of beam (3) back-up coat (3) at the bottom of brace summer below.
7. the construction method of arch subway station according to claim 6 new and old building connected structure, is characterized in that: described segmentation is abolished building up station and to be punched the side wall in mouth (1) region, comprises the following steps:
Step one: carry out temporary plugging to both wired station transfer sections, transforms both wired transfer section furred ceiling upper pipeline, performs vault foot shaped steel pull bar (5); Hold out against with A line abutment wall outside the preliminary bracing at B line station and Second Lining Construction to A line abutment wall;
Step 2: compartment of terrain divides several districts on side wall, cut the interior outside concrete cover of I district's side wall, the reserved steel bar needed for stripping, cuts the concrete in Ith district successively according to cutting order;
Step 3: perform back-up coat (3) at the bottom of the beam of existing arch top bottom girder (2) within the scope of Ith district; By scaffold (10) erection temporary supporting system, build reinforcement post (4), and firm with newly-built structure anchoring;
Step 4: after I structure reaches design strength, cut the interior outside concrete cover of II district's side wall, the reserved steel bar needed for stripping, cuts the concrete in IIth district successively according to cutting order;
Step 5: the temporary support retaining Ith district; Perform back-up coat (3) at the bottom of the beam of existing arch top bottom girder (2) within the scope of IIth district, and set up the temporary support in IIth district with scaffold (10);
Step 6: after II plot structure reaches design strength, with the 4th, the 5th step, successively IIIth district is punched and perform existing arch top bottom girder (2) beam at the bottom of back-up coat (3);
Step 7: the temporary support retaining each district, with the sequence of construction in other districts, dig IV and V district both wired sidewall structures successively, reinforce existing arch top bottom girder (2) on request, wherein the concrete of A line abutment wall cuts into the size that can carry by diamond rope saw static force piecemeal;
Step 8: treat that tunneling segment structure Second Lining Construction is complete, after concrete structure reaches design strength, removes temporary support.
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| JP4705467B2 (en) * | 2005-12-26 | 2011-06-22 | 大成建設株式会社 | Construction method of underground structure |
| CN102226403B (en) * | 2011-03-30 | 2013-11-13 | 中铁一局集团有限公司 | Construction method of large-span subway station main body by using arched cover method and station main body structure |
| CN102748040B (en) * | 2012-07-23 | 2014-09-17 | 中铁一局集团有限公司 | Main structure for metro long-span station and pillar arching construction method thereof |
| CN203050737U (en) * | 2012-11-28 | 2013-07-10 | 北京市市政工程设计研究总院 | Connecting structure for new and old buildings of arched subway station |
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| CN110042860A (en) * | 2019-04-19 | 2019-07-23 | 中铁五局集团成都工程有限责任公司 | The Construction Method of Metro Station of existing underpass intrusion |
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Inventor after: Chen He Inventor after: Sun Lizhu Inventor after: Gao Xincai Inventor after: Xing Wang Inventor after: Xue Rujing Inventor after: Wang Jianzhou Inventor before: Chen He Inventor before: Sun Lizhu Inventor before: Xing Wang Inventor before: Xue Rujing Inventor before: Wang Jianzhou |
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Inventor after: Chen He Inventor after: Sun Lizhu Inventor after: Gao Xincai Inventor after: Xing Wang Inventor after: Xue Rujing Inventor after: Wang Jianzhou Inventor before: Chen He Inventor before: Sun Lizhu Inventor before: Gao Xincai Inventor before: Xing Wang Inventor before: Xue Rujing Inventor before: Wang Jianzhou |
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Address after: 100082 Beijing, Xizhimen, North Street, building 32, No., building 3 Applicant after: BEIJING GENERAL MUNICIPAL ENGINEERING DESIGN & RESEARCH INSTITUTE CO., LTD. Address before: 100082 Beijing, Xizhimen, North Street, building 32, No., building 3 Applicant before: Beijing General Municipal Engineering Design & Research Institute |
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