CN108979664A - Existing subway tunnel based on mobile casting platform protects steel structure pouring construction method - Google Patents

Existing subway tunnel based on mobile casting platform protects steel structure pouring construction method Download PDF

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Publication number
CN108979664A
CN108979664A CN201810634539.0A CN201810634539A CN108979664A CN 108979664 A CN108979664 A CN 108979664A CN 201810634539 A CN201810634539 A CN 201810634539A CN 108979664 A CN108979664 A CN 108979664A
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CN
China
Prior art keywords
steel structure
girder
tunnel
casting platform
mobile casting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810634539.0A
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Chinese (zh)
Inventor
渠小伟
胡家敏
苏增坤
岳庭庭
张帅
张亦程
栗刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TAIYUAN RAILWAY CONSTRUCTION Co Ltd ZHONGTIE 6-BUREAU GROUP
China Railway Sixth Group Co Ltd
Taiyuan Railway Construction Co Ltd of China Railway Sixth Group Co Ltd
Original Assignee
TAIYUAN RAILWAY CONSTRUCTION Co Ltd ZHONGTIE 6-BUREAU GROUP
China Railway Sixth Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TAIYUAN RAILWAY CONSTRUCTION Co Ltd ZHONGTIE 6-BUREAU GROUP, China Railway Sixth Group Co Ltd filed Critical TAIYUAN RAILWAY CONSTRUCTION Co Ltd ZHONGTIE 6-BUREAU GROUP
Priority to CN201810634539.0A priority Critical patent/CN108979664A/en
Publication of CN108979664A publication Critical patent/CN108979664A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/102Removable shuttering; Bearing or supporting devices therefor

Abstract

The invention belongs to the engineering construction fields in spanning existing railway tunnel, in order to guarantee that existing subway tunnel is unable to the requirement of load-bearing, the present invention provides a kind of existing subway tunnels based on mobile casting platform to protect steel structure pouring construction method, several protection steel structures are arranged in across existing tunnel space segmentation, each section of protection steel structure passes through first assembled mobile casting platform, then it is poured using mobile casting platform jacking support formwork for placing completion, after often having poured one section of protection steel structure, then removes steel structure template and be moved to mobile platform using hoist engine and next pour section.Pass through several protection steel structures of across existing tunnel setting, being perfectly safe for city underground operation can be effectively controlled, it is fast much compared with traditional technique from the construction period using mobile casting platform construction simultaneously, have compressed construction period, the potential risk to subway safe operation has been shortened, the security control expense of project management department is reduced.

Description

Existing subway tunnel based on mobile casting platform protects steel structure pouring construction method
Technical field
The invention belongs to the engineering construction fields in spanning existing railway tunnel, and in particular to a kind of based on mobile casting platform Steel structure pouring construction method is protected across existing subway tunnel.
Background technique
With the development of national economy, city size constantly expands, and urban population sharply increases, and the traffic occurred therewith is gathered around Stifled problem is on the rise, and city underground plays particularly important effect in Urban Traffic Planning, thus safety of subway operation at The premise guarantee to run well for urban transportation.In urban traffic engineering development construction, often will appear across, under wear subway The engineering in tunnel, the premise of such engineering construction are to guarantee being perfectly safe for existing subway tunnel, it is ensured that subway realizes " zero wind Danger " operation, to reduce the new class that the influence to existing subway tunnel is Construction Study from now on when building such engineering Topic.Therefore, in order to meet on available railway curve, on long range subway tunnel, engineering of the low clearance across subway work, guarantee simultaneously Existing subway tunnel is unable to the requirement of load-bearing, needs to existing tunnel polarity ballistic support.
Summary of the invention
The present invention in order to meet on available railway curve, on long range subway tunnel, engineering of the low clearance across subway work, together When guarantee that existing subway tunnel is unable to the requirement of load-bearing, and then provide a kind of existing subway tunnel based on mobile casting platform Protect steel structure pouring construction method.
The present invention adopts the following technical scheme:
A kind of mobile casting platform, including rail, bottom girder, girder and supporting beam, twice rail are symmetrically arranged on both along longitudinal direction Have on the two sides cushion cap in tunnel, bottom girder bottom is equipped with traveling wheel, and bottom girder is walked on rail by traveling wheel erection, bottom Oil cylinder is installed at the top of stringer, girder both ends are separately connected the bottom girder of two sides, and supporting beam is identical as protection steel structure inner outline, Supporting beam is installed on girder, and the both ends of supporting beam are connect with oil cylinder, and supporting beam goes up and down contact support protection steel structure with oil cylinder Formwork for placing.Bottom girder, girder are welded by I-steel, and an independent steel structure is formed, and bottom girder is mounted in support Longitudinal bracing system on beam, girder are the lateral connection beams for supporting entire concrete section, connect structure using attachment beam with bottom girder At the strutting system of entire trolley.Supporting beam is subject to the beam body that entire trolley is pressurized, and the interspersed connection of bottom girder, oil cylinder be by The hydraulic system being mounted in supporting beam, adjusts the height of entire strutting system, and the above beam body assembly is mobile trolley used as one.
A kind of existing subway tunnel protection steel structure pouring construction method based on mobile casting platform, is by across existing tunnel Road space segmentation is arranged several segments and protects steel structure, and each section of protection steel structure pours trolley strutting system by the way that first assembly is removable, so It completes to pour using the removable trolley strutting system jacking support formwork for placing that pours afterwards, after often having poured one section of protection steel structure, Steel structure template is removed again and removable will pour trolley strutting system using hoist engine and be moved to next pours section;It is described removable It is dynamic that pour trolley strutting system assembled using connecting plate series connection by two mobile casting platforms.The segmentation for protecting steel structure is root The determination according to the construction technology of the structure combinative prevention steel structure of existing subway, and the setting of trolley is by the several of protection steel structure What what size determined.This project be assembled into that a moveable trolley completes steel structure by two trolleys pour support body System.
Mobile trolley used is that girder steel assembly in length and breadth is connected into a steel structure support system, and the stress point of strutting system is whole It is located on the cushion cap of rigid structure, it is ensured that subway tunnel is not subject to construction loads;Its HYDRAULIC CONTROL SYSTEM strutting system height is utilized afterwards, It manually adjusts stress lead screw and completes system support, the two is implemented in combination with the strutting system lifting i.e. installation and dismounting of template;Finally By the attachment rail on the newly-built rigid structure cushion cap of protection, as the rail of strutting system, with hoist engine realization strutting system Traveling.
Steps are as follows for the removable assembly for pouring trolley strutting system:
The first step, steel rail laying, the pre-buried rail positioning bolt before cushion cap pours concrete, two sides rail is symmetrical and is parallel in tunnel Heart line;
Bottom girder is connect by second step with traveling wheel, and oil cylinder installation and bottom girder top, using crane that bottom girder is whole In orbit, when installing bottom girder, the lifting ear plate of bottom girder is towards tunnel center line side for lifting;
Third step, in main cable and girder to bottom girder, will successively install girder from one end to the other end, after the completion of erection of main beam, peace Attachment beam is filled, is connected girder using attachment beam;
4th step, in girder bottom installation branch lead screw, completes the installation of mobile casting platform, then will be along tunnel using connecting plate The bottom girder of the mobile casting platform in longitudinally arranged two of road connects, and completes the assembly of two mobile casting platforms.
It is calculated after adjusting the size of bottom girder, girder according to its specific geometric dimension for different protection steel structures according to inspection As a result the structure size of bottom girder, girder is determined, it is mobile trolley used mainly using adjustment steel structure support system and hydraulic system It completes to construct to different protection steel structures with running gear.Distance of the rail distance wait pour protection steel structure interior wall side be not small In 0.55m.
Shown connecting plate is equipped with a bolt hole and an adjustment hole, which facilitates two groups of bolt contraposition connections.
The method of the present invention is across existing constructing metro tunnel on city underground line with mobile casting platform strutting system The security risk of construction has obtained effective control, ensure that being perfectly safe for city underground operation, construction period ensures safety " zero accident ", at the same it is fast much compared with traditional technique from the construction period using mobile casting platform construction, it has compressed Construction period has shortened the potential risk to subway safe operation, reduces the security control expense of project management department, and owner gives Adequately certainly.The rigid structure top board construction of protection added in similar operating condition across existing subway tunnel up train and similar phase Closing in the construction of the strutting system of engineering has biggish practical value, can promote and apply in similar engineering.Movement pours Platform specifically has a characteristic that
1) easy to operate: assembly is easy, easy to control, is walked with elevator machine travel, and sideline is controlled, and absolute altitude is controlled by hydraulic cylinder System.
2) short construction period: after completing primary assembly, after hoist engine movement in place, oil cylinder is raised to reservation absolute altitude, just Follow-up work can be done, after reaching design strength, retract cylinder is forwarded to next construction section.There is no set up, assembled mistake Journey is saved the construction time, is shortened the construction period.
3) it reduces artificial and mechanical equipment use: no longer needing man-made assembly and big machinery to set in the construction process Standby cooperation only need to once be put into, the entire engineering of income.
4) safe and reliable: entire trolley uses full steel structure, and rigidity is big, and globality is strong, and system internal loading is transferred to and is applied In work cushion cap, do not need to handle strutting system basis again, save basement process related process, at the same to existing metro operation without It influences, it is ensured that construction safety.
5) the movement casting platform be suitable for span it is certain in the case where, by controlling its length, height, carry out adjusting bracket System completes top plate engineering construction.
6) mobile casting platform is in the successful application across existing constructing metro tunnel, and across existing structure object (is protected on Shield, cannot weigh) frame bridge construction started precedent.It is able to solve by implementing the construction to existing subway fortune The problems such as safe control and duration are tight, construction is simplified is sought, guarantees the safety constructed and quality, improve construction speed, drop Low engineering comprehensive cost, this technology maturation, economical, societal benefits are obvious, have good promotion and application value.
Detailed description of the invention
Fig. 1 is the construction flow chart of the mobile casting platform of the present invention;
Fig. 2-5 is the assembled step schematic diagram of mobile casting platform;
Fig. 6 is the A-A cross-sectional view of Fig. 4;
Fig. 7 is the structural schematic diagram of connecting plate;
Fig. 8 is mobile casting platform for applying working condition schematic diagram when pouring;
Fig. 9 is the walking operating condition schematic diagram of mobile casting platform;
In figure: 1- protect steel structure, 2- rail, 3- oil cylinder, 4- bottom girder, 5- traveling wheel, 6- girder, 7- attachment beam, 8- supporting beam, 9- connecting plate, 10- bolt hole, 11- adjustment hole.
Specific embodiment
By taking certain engineering as an example, the subway tunnel frame for being completed and running across certain in the engineering, subway tunnel top plate cannot Load brought by the engineering is carried, is required to guarantee that safety of subway operation meets subway unit of operation, therefore design subway tunnel Increasing on road protects rigid structure across subway tunnel.26 rigid structures (25 ordinary constructions, 1 rigid structure of abnormity) are set altogether to existing Ground iron frame is protected.Each just structure system independently constitutes protection module, the setting on the outside of tunnel line protect-ing frame structure.Straightway Span is used to be protected for the rigid structure of 16.8m, rigid structure width 9.9m, basis uses 3 1.25m drilled piles.The rigid structure of curved section Sector arrangement, curve outside widening.It is protected at pump house using the rigid structure of span 20.85m, rigid structure width 13.2m, basis uses 4 1.25m drilled piles.Rigid structure is protected to connect at existing shielded frame, using the rigid structure of abnormity.The rigid structure of the section prolongs subway direction overall length 292.34m.Rigid structure side thickness 0.8m/1.0m, top plate thickness 1.0m, top plate bottom to existing ground iron frame top minimum headroom 1.8m.Rigid structure Main body is C40 durability concrete.
And the heavy difficult point for protecting rigid structure to construct is exactly the protection in work progress to existing subway tunnel, through research by adopting With mobile casting platform, the construction to rigid structure top plate is protected is realized, this engineering method core process is: 1. girder steel assembly will connect in length and breadth At a steel structure support system, the stress point of strutting system is all located on the cushion cap of rigid structure, it is ensured that subway tunnel is not subject to Construction loads;2. utilizing its HYDRAULIC CONTROL SYSTEM strutting system height, manually adjusts stress lead screw and complete system support, the two knot Close the installation and dismounting for realizing that strutting system lifting is template;3. by the attachment rail on the newly-built rigid structure cushion cap of protection, as The rail of strutting system realizes the traveling of strutting system with hoist engine.It is realized by three above core process mobile trolley used Working principle.
The removable specific assembled process for pouring trolley strutting system is as follows:
Step 1: steel rail laying, live rail uses 50kg/m.Concrete operations are that pre-buried rail positions spiral shell before cushion cap pours concrete Bolt, two sides rail should be symmetrical and be parallel to tunnel center line, and it is 0.55m, rail that left and right side distance, which creates abutment wall distance in frame, Between distance be 14.1m, as shown in Figure 1.
Step 2: bottom girder is connect with traveling wheel, and oil cylinder is installed;It is in orbit using crane integral hoisting, And be arranged and be reliably fixed temporarily, prevent bottom girder from toppling over.When installing bottom girder, otic placode is towards the inside, as shown in Figure 2.
Step 3: successively installing girder from one end to the other end in main cable and girder to bottom girder, erection of main beam is completed Afterwards, attachment beam is installed, girder is connected;When carrying out erection of main beam it is noted that the difference of edge-beam and middle girder, simultaneously First supporting beam to be put in when carrying out edge-beam installation, it is ensured that once mounting success, as shown in Figure 3.
Step 4: installation branch ground lead screw, completes mobile trolley used installation, after by two trolley connecting plates after installation by two A bottom girder connects, and completes trolley assembly, and composition is removable to pour trolley strutting system, as shown in Figure 4.
The applying working condition of mobile platform is as follows:
Pour operating condition (Fig. 8): by assembled good mobile casting platform traveling to casting position, after by mobile trolley used fixation, use Rigid structure sideline console truck position, uses oil cylinder console roof absolute altitude, girder is jacked up to designed elevation after position control is good, after Bottom girder lower leading screw is all back-outed, holding out against cushion cap top surface makes it that power is transferred to cushion cap top surface.With oil cylinder console roof mark Gao Shiying first it is carried out before installation template cross-section, etc. weight carry out precompressed determine camber, after control formwork elevation measuring When consider camber.
Walking operating condition (Fig. 9): rigid structure abutment wall, top plate pour completion, after reaching design strength, need form removal first the bottom of by Silk, which is shouldered, under stringer all screws back the ground that falls off, after with oil cylinder girder is withdrawn into situ, rear form removal, release braking, use elevator Mobile platform is moved to and next pours section by machine.
The Specific construction economic benefit of the engineering:
Using strip footing+steel grit box (adjustment height)+I36 I-steel+H700 fashioned iron+bed die system on protection steel structure cushion cap System, because bottom plate and assembling reinforcement pour concrete technology equally therefore does not consider the link duration at 6 days every hole strutting system durations, removes Strutting system 3 days, a circulation strutting system duration was 9 days.1. C30 concrete strip footing is often across 8 strip footings, each labor service Take, fee of material and template depreciation cost amount to 8000 yuan.2. sandbox lease (purchase), installation are removed often across 2800 yuan total.3. work Word steel+H profile steel is often 13800 yuan total across installation, dismounting.Often across 22600 yuan total.
And mobile casting platform original equipment cost every (often across 1) 54.5 ten thousand is used, installation fee and last are removed for the first time Take and is calculated by 20,000 yuan.Total 56.5 ten thousand direct cost.It is often installation, the mobile casting platform total 3 of traveling across the construction time It, people, machine (hoist engine of traveling), material (rail of traveling) are 3200 yuan total.Protect rigid structure total 26 across using shifting Dynamic casting platform is total: 56.5+0.32 × 26(across)=64.82 ten thousand yuan.
By the duration it is constant, be all made of single span construction use people, machine, material analysis in the case where comparison, calculate two kinds of techniques Economic benefit be divided into: 1. mobile trolley used 65.82 ten thousand yuan.2. 24600 × 3(of H profile steel system covers) × 9=66.42 ten thousand yuan.It is mobile Casting platform saves 6000 yuan of direct cost.
By contrast using mobile casting platform than using traditional strip footing+steel grit box (adjustment height)+I36 I-steel + H700 fashioned iron+bed die system will save 6000 yuan of direct economy cost, while invest 2 sets of abutment wall roof plate template less, and every set is rented It rents by 3 months, every set needs template 9.72t, 160m altogether2, lease 90 × 160 × 0.6 × 2=17280 yuan of valence.
It is total to save 23280 yuan of direct economy cost, and equipment is a set of after completion of constructing.

Claims (5)

1. a kind of mobile casting platform, it is characterised in that: including rail (2), bottom girder (4), girder (7) and supporting beam (8), two Road rail (2) is symmetrically arranged on along longitudinal direction on the two sides cushion cap in existing tunnel, and bottom girder (4) bottom is equipped with traveling wheel (5), bottom Stringer (4) is set up by traveling wheel (5) and is walked on rail (2), is equipped with oil cylinder (3) at the top of bottom girder (4), girder (7) two End is separately connected the bottom girder (4) of two sides, and supporting beam (8) is identical as protection steel structure (1) inner outline, and supporting beam (8) is installed on On girder (7), the both ends of supporting beam (8) are connect with oil cylinder (3), and supporting beam (8) goes up and down contact support protection steel structure with oil cylinder (3) (1) formwork for placing.
2. a kind of existing subway tunnel based on mobile casting platform protects steel structure pouring construction method, it is characterised in that: be logical It crosses across existing tunnel space segmentation setting several segments and protects steel structure, each section of protection steel structure pours trolley branch by the way that first assembly is removable Then frame system is completed to pour, has often poured one section and prevented using the removable trolley strutting system jacking support formwork for placing that pours After shield steel structure, then removes steel structure template and removable will pour trolley strutting system using hoist engine and be moved to next pour Section;It is described that removable to pour trolley strutting system assembled using connecting plate series connection by two mobile casting platforms.
3. the existing subway tunnel according to claim 2 based on mobile casting platform protects steel structure pouring construction method, It is characterized in that, steps are as follows for the removable assembly for pouring trolley strutting system:
The first step, steel rail laying, the pre-buried rail positioning bolt before cushion cap pours concrete, two sides rail is symmetrical and is parallel in tunnel Heart line;
Bottom girder is connect by second step with traveling wheel, and oil cylinder is installed at the top of bottom girder, using crane that bottom girder is whole In orbit, when installing bottom girder, the lifting ear plate of bottom girder is towards tunnel center line side for lifting;
Third step, in main cable and girder to bottom girder, will successively install girder from one end to the other end, after the completion of erection of main beam, peace Attachment beam is filled, is connected girder using attachment beam;
4th step, in girder bottom installation branch lead screw, completes the installation of mobile casting platform, then will be along tunnel using connecting plate The bottom girder of the mobile casting platform in longitudinally arranged two of road connects, and completes the assembly of two mobile casting platforms.
4. the construction party of the rigid structure of the protection mobile casting platform according to claim 3 across existing constructing metro tunnel Method, it is characterised in that: the rail distance is wait pour the distance on protection steel structure interior wall side not less than 0.55m.
5. the construction party of the rigid structure of the protection mobile casting platform according to claim 4 across existing constructing metro tunnel Method, it is characterised in that: shown connecting plate is equipped with a bolt hole and an adjustment hole.
CN201810634539.0A 2018-06-20 2018-06-20 Existing subway tunnel based on mobile casting platform protects steel structure pouring construction method Pending CN108979664A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110593136A (en) * 2019-10-23 2019-12-20 中铁七局集团有限公司 Arch ring walking type formwork trolley of deck arch bridge and construction method
CN112458912A (en) * 2020-11-16 2021-03-09 中铁四局集团第二工程有限公司 Walking type trolley and installation method and construction method thereof

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Publication number Priority date Publication date Assignee Title
CN202595630U (en) * 2012-05-03 2012-12-12 中铁七局集团有限公司 Template construction trolley for steel-frame bridge crossing business line
CN202865754U (en) * 2012-11-15 2013-04-10 中铁八局集团第二工程有限公司 Hydraulic pressure demould automatic walking trolley used for construction of metro platform
CN204126654U (en) * 2014-08-28 2015-01-28 中铁十二局集团第三工程有限公司 The anti-electric bow member chassis of single-track tunnel spreading open cut tunnel lining construction
CN105114102A (en) * 2015-09-01 2015-12-02 东莞市万桥钢模有限公司 Subway station formwork trolley
CN205954489U (en) * 2016-08-23 2017-02-15 中铁二十一局集团第六工程有限公司 Stride cast -in -place space of business line steel structure construction protection on bridge and move movable support

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202595630U (en) * 2012-05-03 2012-12-12 中铁七局集团有限公司 Template construction trolley for steel-frame bridge crossing business line
CN202865754U (en) * 2012-11-15 2013-04-10 中铁八局集团第二工程有限公司 Hydraulic pressure demould automatic walking trolley used for construction of metro platform
CN204126654U (en) * 2014-08-28 2015-01-28 中铁十二局集团第三工程有限公司 The anti-electric bow member chassis of single-track tunnel spreading open cut tunnel lining construction
CN105114102A (en) * 2015-09-01 2015-12-02 东莞市万桥钢模有限公司 Subway station formwork trolley
CN205954489U (en) * 2016-08-23 2017-02-15 中铁二十一局集团第六工程有限公司 Stride cast -in -place space of business line steel structure construction protection on bridge and move movable support

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110593136A (en) * 2019-10-23 2019-12-20 中铁七局集团有限公司 Arch ring walking type formwork trolley of deck arch bridge and construction method
CN112458912A (en) * 2020-11-16 2021-03-09 中铁四局集团第二工程有限公司 Walking type trolley and installation method and construction method thereof

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Application publication date: 20181211