CN105134253B - Tunnel inverted arch composite entity template and pouring construction method - Google Patents
Tunnel inverted arch composite entity template and pouring construction method Download PDFInfo
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- CN105134253B CN105134253B CN201510399685.6A CN201510399685A CN105134253B CN 105134253 B CN105134253 B CN 105134253B CN 201510399685 A CN201510399685 A CN 201510399685A CN 105134253 B CN105134253 B CN 105134253B
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Abstract
The invention belongs to technical field of tunnel construction, specifically a kind of tunnel inverted arch composite entity template and pouring construction method.Solve traditional small punching block and piecemeal progress tunnel inverted arch construction by several times is combined with wooden model, the problem of time-consuming and efficiency of construction is slow, a kind of tunnel inverted arch composite entity template, including inverted arch and filling combination sizing end head formwork, inverted arch avris arc mould and Central drain template.Inverted arch template and filling template Combined machining are integrated by the present invention, the once elongated machine-shaping of Central drain template, excavator lifts by crane in construction, and hand fit's once mounting is in place, artificial block-by-block template assembly, the activity duration removed are effectively shortened, improves efficiency of construction.
Description
Technical field
The invention belongs to technical field of tunnel construction, specifically a kind of tunnel inverted arch composite entity template and pouring construction side
Method.
Background technology
With the fast development of high-speed railway construction and taking place frequently for tunnel safety accident, the requirement to tunnel safety step pitch is got over
Come stricter, the speed of application and the requirement such as quality closed to inverted arch after tunnel excavation are also more and more high.Traditional small punching block with
Wooden model combination piecemeal carries out tunnel inverted arch construction by several times, not only time-consuming, and repeatedly carries out inverted arch and filled end in constructing
The installation of head mould plate, remove, the merogenesis assembly of Central drain template, remove, process is various, and construction speed is slow, safe step pitch
Hysteresis is serious, while quality is difficult to ensure that, wooden arc mould wastes also obvious.
The content of the invention
The present invention combines piecemeal progress tunnel inverted arch construction by several times to solve traditional small punching block with wooden model, time-consuming
With efficiency of construction it is slow the problem of, there is provided a kind of tunnel inverted arch composite entity template and pouring construction method.
The present invention takes following technical scheme：A kind of tunnel inverted arch composite entity template, including inverted arch and filling combination are determined
Type end head formwork, inverted arch avris arc mould and Central drain template.
Described inverted arch and filling combination sizing end head formwork is included above the inverted arch template and inverted arch template of arc
Filled end mould, inverted arch template bottom are provided with some reinforcing bar holes longitudinally disposed along circuit, and inverted arch template bottom is additionally provided with edge and faced upward
Encircle the waterstop clip slot that template arc is set, be connected between inverted arch template and filled end mould by platform steel plate, filled end mould
The groove for being used for making Central drain is provided with the upside of middle part.
Described inverted arch avris arc mould is assembled for some small inverted arch avris arc moulds of section, often saves small inverted arch avris arc mould bag
Bracket panel, side is welded with support frame in curved panel, is welded with support frame and connects some small inverted arch avris arc moulds
Integral longeron.
Described Central drain template includes the side wall template of both sides and the Central drain template of bottom, the side wall mould of both sides
Connected between plate with steel-pipe welding, template suspension ring are welded with side wall template.
Three reinforcings are carried out using the thick steel plate of No. 5 equal leg angles and 5mm on the outside of filled end mould, and at filled end mould edge
Respectively symmetrically weld some suspension ring.
Inverted arch and filling combination sizing end head formwork are defined by line midline and are divided into two pieces of left and right and are bolted, and are faced upward
The height of arch template both sides is higher 40cm than filled end mould, the positions as the two small abutment walls of lining.
Described small inverted arch avris arc mould is provided with arc mould handle.
It is welded to connect between the side wall template of described Central drain template both sides with steel pipe by 1.0m spacing, side wall mould
Spacing on plate by 1.5m is being welded with template suspension ring.
A kind of pouring construction method of tunnel inverted arch composite entity template, construction procedure are as follows：1）Process composite entity mould
Plate；2）Measurement and positioning unwrapping wire；3）Inverted arch excavates and the cleaning of tunnel bottom；4）Inverted arch steelframe and construction of shotcrete；5）Inverted arch and fill out
Fill combination sizing end head formwork installation；6）The colligation of inverted arch reinforcing bar and waterstop installation；7）Inverted arch avris arc mould is installed；8）Inverted arch mixes
Solidifying soil is poured and conserved；9）Inverted arch avris arc mould is removed and Central drain model sheetinstallat；10）Inverted arch fill concrete pours；11）
The form removal of inverted arch entirety, maintenance.
Specific construction step is as follows：
1）Process composite entity template：Processing including inverted arch and filling combination sizing end head formwork, inverted arch avris arc mould
Processing and Central drain template processing；
2）Measurement and positioning unwrapping wire：Inverted arch carries out unwrapping wire before excavating to inverted arch excavation length, depth location, while in tunnel two
The first branch of side carries out setting-out, and marked in face of inverted arch exposed steel bar absolute altitude, small abutment wall absolute altitude, blind pipe position；
3）Inverted arch excavates and the cleaning of tunnel bottom：Inverted arch is excavated to after designed elevation, and the empty quarrel of bottom is cleared up, backbreak
Part with the concrete backfill of label or carries out gunite concrete processing using with inverted arch, ensures that substrate radian is smoother, closely knit；
4）Inverted arch steelframe and construction of shotcrete；
5）Inverted arch and filling combination sizing end head formwork installation；
6）The colligation of inverted arch reinforcing bar and waterstop installation：Set according to what inverted arch and filling combination sizing end head formwork bottom were reserved
Meter reinforcing bar hole spacing is positioned, colligation, welding, and reinforcing bar is interted in hole, as the overlap joint of the following group inverted arch reinforcing bar,
It is synchronous that ring back of the body patch waterstop is pushed down into fixation by inverted arch and filling combination sizing end head formwork during reinforcing bar colligation,
In buried rubber fastening band load the ring waterstop clip slot of inverted arch and filling combination sizing end head formwork, in buried rubber water-proof
A band part is arranged in clip slot, and a part is arranged among inverted arch reinforcing bar；Longitudinal back-adhering waterstop is faced upward by the way that colligation is good
Encircle outer reinforcement, be fixed using small angle steel and fixed in first branch concrete surface, longitudinal back-adhering waterstop using square steel fixture
Installation.
7）Inverted arch avris arc mould is installed：Inverted arch avris arc mould is uniformly connected by manually carrying out monolithic assembly, every piece of avris arc mould
An entirety is connected into, being aligned is installed by longeron and inverted arch avris arc mould, by the support frame of longeron bottom and the handle of arc mould
Fixed to hold level with both hands after thick stick is connected with fastening, longeron one end of inverted arch avris arc mould is erected in the upper group of inverted arch constructed filling
Face, one end is erected on filled end mould, to inverted arch avris arc mould enters row line, absolute altitude is fixed；
8）Inverted arch concreting and maintenance；
9）Inverted arch avris arc mould is removed and Central drain model sheetinstallat；After inverted arch concrete strength reaches initial setting strength, enter
The dismounting of row arc mould, synchronous to lift by crane Central drain template by excavator after arc mould is removed, hand fit's installation, Central drain
Template one end is erected the upper group of Central drain constructed position, and one end is erected in inverted arch and filling combination sizing end head formwork
Groove on, middle hanging part is supported using support to integral central ditch template, ensure Central drain template it is steady
Gu；
10）Inverted arch fill concrete pours；
11）The form removal of inverted arch entirety, maintenance.
Compared with prior art, the benefit that the present invention has is as follows：
1. inverted arch template and filling template Combined machining are integrated by composite entity template, Central drain template is once elongated
Machine-shaping, excavator lifts by crane in construction, and hand fit's once mounting in place, effectively shortens artificial block-by-block template assembly, torn open
The activity duration removed, improve efficiency of construction.
2. inverted arch avris arc mould is assembled by monolithic, is reinforced and positioned by longeron, monolithic arc modulo operation is easy, can be effective
Inverted arch abutment wall radian is controlled, is connected well with barrel lining cutting bottom, construction quality positive effect.
3. inverted arch termination ring waterstop uses Template Location, longitudinal waterstop is fixed using positioning fixture so that sealing
Band installation site is accurate, and fixed, radian and linear criterion, construction quality is preferable, and waterproof effect is obvious.
4. stencil design is ingenious, dismounting is easily installed, construction technology is easily mastered, and is easy to organize, and can be effectively improved
Construction speed and construction quality, it is cost-effective, while the exceeded risk of safe step pitch is reduced, there is very big economic benefit and society
Can benefit.
Brief description of the drawings
Fig. 1 is overall sectional drawing on the inside of inverted arch and filling combination sizing end head formwork；
Fig. 2 is overall sectional drawing on the outside of inverted arch and filling combination sizing end head formwork；
Fig. 3 is left side sectional drawing on the inside of inverted arch and filling combination sizing end head formwork；
Fig. 4 is left side sectional drawing on the outside of inverted arch and filling combination sizing end head formwork；
Fig. 5 is A-A sectional schematic diagrams；
Fig. 6 is inverted arch avris arc mould sectional drawing；
Fig. 7 is inverted arch abutment wall arc mould top plan view；
Fig. 8 is that inverted arch abutment wall arc mould I-steel reinforces top plan view；
Fig. 9 is Central drain template sectional drawing；
Figure 10 is Central drain template fore-and-aft plane top view；
Figure 11 is that inverted arch abutment wall arc mould longeron reinforces longitudinal sectional drawing；
1- inverted arch and filling combination sizing end head formwork, 2- inverted arch avris arc moulds, 3- Central drain templates, 4- have been applied in figure
The good inverted arch of work, 1.1- inverted arch templates, 1.2- suspension ring, 1.3- filled end moulds, 1.4- reinforcing bar holes, 1.5- waterstop clip slots, 2.1-
Curved panel, 2.2- longerons, 2.3- support frames, 2.4- arc mould handles, 3.1- side wall templates, 3.2- Central drain templates, 3.3-
Steel pipe 3.4- template suspension ring.
Embodiment
A kind of tunnel inverted arch composite entity template, including inverted arch and filling combination sizing end head formwork 1, inverted arch avris arc mould
2 and Central drain template 3.
As shown in Figure 1,2,3, 4, described inverted arch and filling combination sizing end head formwork include the inverted arch template 1.1 of arc
And the filled end mould 1.3 of the top of inverted arch template 1.1, the bottom of inverted arch template 1.1 is provided with some reinforcing bars longitudinally disposed along circuit
Hole 1.4, the bottom of inverted arch template 1.1 be additionally provided with along inverted arch template arc set waterstop clip slot 1.5, inverted arch template 1.1 with
It is connected between filled end mould 1.3 by platform steel plate, the middle part of filled end mould 1.3 upside, which is provided with, to be used to make the recessed of Central drain
Groove.
As shown in Figure 6,7, described inverted arch avris arc mould 2 is assembled for some small inverted arch avris arc moulds of section, often saves small
Inverted arch avris arc mould includes curved panel 2.1, and side is welded with support frame 2.3 in curved panel 2.1, is welded on support frame 2.3
Have and some small inverted arch avris arc moulds are connected into integral longeron 2.2.
As shown in Fig. 9,10, described Central drain template 3 includes the side wall template 3.1 of both sides and the Central drain of bottom
Template 3.2, it is welded to connect with steel pipe 3.3 between the side wall template 3.1 of both sides, template suspension ring 3.4 is welded with side wall template.
The outside of filled end mould 1.3 carries out three reinforcings using the thick steel plate of No. 5 equal leg angles and 5mm, and in filled end mould
Respectively symmetrically weld some suspension ring 1.2 in edge.
Inverted arch and filling combination sizing end head formwork are defined by line midline and are divided into two pieces of left and right and are bolted, and are faced upward
Encircle the height of the both sides of template 1.1 than 1.3 high 40cm of filled end mould, the position as the two small abutment walls of lining.
Described small inverted arch avris arc mould is provided with arc mould handle 2.4.
Connected between the side wall template 3.1 of the described both sides of Central drain template 3 with steel pipe 3.3 by 1.0m spacing welding
Connect, the spacing in side wall template 3.1 by 1.5m is being welded with template suspension ring 3.4.
A kind of pouring construction method of tunnel inverted arch composite entity template, construction procedure are as follows：1）Process composite entity mould
Plate；2）Measurement and positioning unwrapping wire；3）Inverted arch excavates and the cleaning of tunnel bottom；4）Inverted arch steelframe and construction of shotcrete；5）Inverted arch and fill out
Fill combination sizing end head formwork installation；6）The colligation of inverted arch reinforcing bar and waterstop installation；7）Inverted arch avris arc mould is installed；8）Inverted arch mixes
Solidifying soil is poured and conserved；9）Inverted arch avris arc mould is removed and Central drain model sheetinstallat；10）Inverted arch fill concrete pours；11）
The form removal of inverted arch entirety, maintenance.
Specific construction step is as follows：
1）Process composite entity template：Processing including inverted arch and filling combination sizing end head formwork, inverted arch avris arc mould
Processing and Central drain template processing.
2）Measurement and positioning unwrapping wire：Inverted arch carries out unwrapping wire before excavating to inverted arch excavation length, depth location, while in tunnel two
The first branch of side carries out setting-out, and marked in face of inverted arch exposed steel bar absolute altitude, small abutment wall absolute altitude, blind pipe position.
3）Inverted arch excavates and the cleaning of tunnel bottom：Inverted arch is excavated to after designed elevation, and the empty quarrel of bottom is cleared up, backbreak
Part with the concrete backfill of label or carries out gunite concrete processing using with inverted arch, ensures that substrate radian is smoother, closely knit.
4）Inverted arch steelframe and construction of shotcrete.
5）Inverted arch and filling combination sizing end head formwork installation.
6）The colligation of inverted arch reinforcing bar and waterstop installation：Set according to what inverted arch and filling combination sizing end head formwork bottom were reserved
Meter reinforcing bar hole spacing is positioned, colligation, welding, and reinforcing bar is interted in hole, as the overlap joint of the following group inverted arch reinforcing bar,
It is synchronous that ring back of the body patch waterstop is pushed down into fixation by inverted arch and filling combination sizing end head formwork during reinforcing bar colligation,
In buried rubber fastening band load the ring waterstop clip slot of inverted arch and filling combination sizing end head formwork, in buried rubber water-proof
A band part is arranged in clip slot, and a part is arranged among inverted arch reinforcing bar；Longitudinal back-adhering waterstop is faced upward by the way that colligation is good
Encircle outer reinforcement, be fixed using small angle steel and fixed in first branch concrete surface, longitudinal back-adhering waterstop using square steel fixture
Installation.
7）Inverted arch avris arc mould is installed：Inverted arch avris arc mould is uniformly connected by manually carrying out monolithic assembly, every piece of avris arc mould
An entirety is connected into, being aligned is installed by longeron and inverted arch avris arc mould, by the support frame of longeron bottom and the handle of arc mould
Fixed to hold level with both hands after thick stick is connected with fastening, longeron one end of inverted arch avris arc mould is erected in the upper group of inverted arch constructed filling
Face, one end is erected on filled end mould, to inverted arch avris arc mould enters row line, absolute altitude is fixed.（As shown in figure 11)
8）Inverted arch concreting and maintenance.
9）Inverted arch avris arc mould is removed and Central drain model sheetinstallat；After inverted arch concrete strength reaches initial setting strength, enter
The dismounting of row arc mould, synchronous to lift by crane Central drain template by excavator after arc mould is removed, hand fit's installation, Central drain
Template one end is erected the upper group of Central drain constructed position, and one end is erected in inverted arch and filling combination sizing end head formwork
Groove on, middle hanging part is supported using support to integral central ditch template, ensure Central drain template it is steady
Gu.
10）Inverted arch fill concrete pours.
11）The form removal of inverted arch entirety, maintenance.
1.1 processing composite entity templates
1.1.1 inverted arch and filling combination sizing end head formwork processing
According to the requirement of Tunnel Design drawing, 40cm screed-coat, end head formwork design are reserved after inverted arch and filling construction
Integral combination set shaped steel formwork, inverted arch and the end mould of filling are integrated, both sides inverted arch is higher by 40cm than filling, as two
Serve as a contrast the position of small abutment wall.Template is used uniformly the thick steel plates of 5mm and formed by inverted arch and filling radian integral solder, with line midline
It is defined, is divided into two pieces of left and right, centre reserves the position of Central drain, the overall bolt connection for using Φ 22.
It is connected between inverted arch template and filled end mould by the wide platform steel plates of 50cm, inverted arch template reserves in inner side
Ring waterstop clip slot deep 15cm, while by the spacing of design inverted arch reinforcing bar, the interspersed hole of reinforcing bar is reserved respectively.Fill mould
Monolithic carries out three reinforcings using the thick steel plate of No. 5 equal leg angles and 5mm on the outside of plate, and uses the screw-thread steels of Φ 22 at template edge
Two suspension ring are respectively welded, are easy to template lifting installation.
1.1.2 inverted arch avris arc mould is processed
Inverted arch avris arc mould is processed by 1.0m × 1.5m sizes monoblock design, and every piece of arc mould uses 3mm according to design radian
Steel plate curved arc makees panel, 2cm steel plates make sizing floor processing, and avris is reinforced using 4 × 4 equal leg angles.Every piece of arc mould bottom
Portion both sides using No. 8 channel-section steels handle are respectively welded and the end that is connected, and Φ 22 is reserved respectively at the both ends of the horizontal fixing end of channel-section steel
Bolt hole, be easy to lower step arc mould to be connected with longitudinal crossbeam.
Length of constructing is allowed according to inverted arch in design specification and associated documents, two 16 I-steel are used with length by 5m length
The pattern of ladder carries out longitudinal crossbeam processing, and bottom is connected to two I-steel weldings respectively with No. 8 channel-section steels, 6 × 4 square steel of top
Connect, I-steel spacing is defined by the length of the flat thick stick of monolithic arc mould handle securement end, while No. 8 channel-section steels welding of longitudinal crossbeam bottom
Position must be corresponding, and reserved corresponding bolt hole, is easy to arc mould in model sheetinstallat to be connected with longitudinal crossbeam
It is fixed.
1.1.3 Central drain template is processed
Central drain template uses 5mm steel plates, the 5m length entirety that size is constructed by design drawing, length according to inverted arch
Welding processing, spacing and Zhong Gou both sides wall form firm welding of the centre using the steel pipes of Ф 32 by 1.0m, as shuttering supporting steel
Part.Firmly welded on the middle side template side of ditch two by 1.5m spacing using Ф 22 screw-thread steel simultaneously, as template suspension ring.
1.2 measurement and positioning unwrapping wire
Inverted arch carries out unwrapping wire to inverted arch excavation length, depth location before excavating, while the first branch in tunnel both sides faces to face upward
Encircle exposed steel bar absolute altitude, small abutment wall absolute altitude, the progress setting-out of blind pipe position, and marked with paint.
1.3 inverted arch excavate and the cleaning of tunnel bottom
Inverted arch excavates uses blast working, hand fit's mechanical work according to the soft or hard degree of country rock.Excavate and arrive in inverted arch tunnel bottom
After designed elevation, the empty quarrel of bottom is cleared up, the part backbreak is used with inverted arch with the concrete backfill of label or progress
The processing of C25 gunite concretes, ensure that substrate radian is smoother, closely knit.
1.4 inverted arch steelframes and construction of shotcrete
Tunnel bottom application work in place after, inverted arch steelframe steelframe drop-over for leading with is installed, and each connecting plate of steelframe must be close during installation
Patch, especially inverted arch steelframe be connecteds plate connector connection with leading bow member under just branch and have to comply with test standard requirement, and it is individual to connect Board position
Do not have that space is not closely connected, it is firm to stopper full weld using band iron or reinforcing bar.
After steelframe is installed in place acceptance(check), the injection of the first branch concrete of inverted arch is carried out, notice that spray is mixed when in course of injection
Solidifying soil and the distance and angle in the first branch face of inverted arch, surface is smoother, closely knit, especially inverted arch tip position, is easy to lower step template
Installation.
1.5 filled end moulds are installed
Filled end mould is lifted by crane using excavator, hand fit's installation.It is defined by tunnel line center line, two pieces of end mould lifting peaces
After setting position, medial and lateral are respectively adopted steel pipe diagonal brace and fixed, and the middle bolt by Φ 22 connects two pieces of templates integral.
1.6 inverted arch reinforcing bar colligations and waterstop installation
Inverted arch reinforcing bar carries out pre-bending processing according to design drawing, between the design reinforcing bar hole reserved according to filled end mould bottom
Away from positioned, colligation, welding, and reinforcing bar is interted in hole, the overlap joint as the following group inverted arch reinforcing bar.In reinforcing bar colligation
During, it is synchronous ring is carried on the back into patch waterstop to be fixed by holding to be molded, in buried rubber fastening band load the clip slot of filled end mould,
Waterstop 15cm is in clip slot, and 15cm is among inverted arch reinforcing bar.
Longitudinal back-adhering waterstop is fixed in first branch coagulation by the good inverted arch outer reinforcement of colligation using small angle steel
Native face.Steel side waterstop is clipped in the middle using two 2.5 × 4cm square steel, is fixed and tightened with bolt between two square steel, to ensure steel side
Waterstop is straight；The connection of adjacent sealing interband uses rivet interlacement, and the lap of splice is not less than 30cm.
1.7 inverted arch avris arc moulds are installed
Avris arc mould by manually carry out monolithic assembly, every piece of arc intermode by Φ 22 bolt uniformly connect into one it is whole
Body.Synchronous longeron and arc mould installation being aligned, the flat thick stick of handle securement end of the channel-section steel of longeron bottom and arc mould is connected with
After fastening, longeron one end erects to be erected on filled end mould in the upper group of inverted arch constructed fill surface, one end, and arc mould is carried out
Circuit, absolute altitude are fixed.
1.8 inverted arch concretings and maintenance
Waterstop is gone through before inverted arch concrete is poured, embedding pipe fittingses install whether correct, end mould, the reinforcing of arc mould
Whether firmly, there is exhaustive.Check that inspection declaration can carry out casting concrete after qualified, must be grasped in concreting process
The speed and the frequency vibrated, especially two side wall arc mould positions, it is impossible to vibrate too long and too big, cause concrete to be all lost in
In bottom, the integral curved structure of inverted arch concrete is influenceed.
1.9 avris arc moulds are removed and Central drain model sheetinstallat
After inverted arch concrete strength reaches initial setting strength, the dismounting of arc mould is carried out.First to tear longeron during form removal open, it is artificial to carry
Remove, then block-by-block removes arc mould again, to rap light sled in demolishing process, prevent long-lasting operation from causing template deformation.
It is synchronous to lift by crane Central drain template by excavator after arc mould is removed, hand fit's installation.Central drain template with
The longeron of arc mould is the same, and one end erects erects the ditch card in filled end mould in the upper group of Central drain constructed position, one end
On groove, middle hanging part is supported using support to integral central ditch template, ensures the firm of Central drain template.
1.10 inverted arch fill concretes pour
For inverted arch fill concrete by mixing plant centralized mixing, concrete transport vehicle is transported to job site, chute blanking, insertion
Formula vibrator vibration compacting, after concreting reaches absolute altitude, receipts face is carried out in time.
1.11 inverted arch entirety form removals, maintenance
After fill concrete intensity reaches the 50% of design strength, then carry out form removal；Inverted arch end head formwork and Central drain mould
Plate is all removed using excavator lifting, hand fit, had bad luck.Traveling of the vehicle on inverted arch is considered after form removal, can be in traveling position
One layer of steel plate of covering is put, prevents vehicle traveling from causing to roll to inverted arch, it is synchronous to take inverted arch fill concrete watering to conserve, support
Number of days is protected to be no less than 14 days.
2. construction material
The processing of inverted arch composite entity template mainly needs construction material to be shown in Table 1.
The inverted arch composite entity template of table 1 processes main construction material table
| Sequence number | Title | Specifications and models/technical indicator | Construction purposes | Remarks |
| 1 | Steel plate | 5mm is thick | Inverted arch and filling combination sizing end head formwork, the processing of Central drain template | |
| 2 | Equal leg angle | No. 5 | Inverted arch and filling combination sizing end head formwork are reinforced | |
| 3 | Bolt | Φ22 | Hold mould, the connection of arc mould | |
| 4 | Screw-thread steel | Φ22 | Template suspension ring | |
| 5 | Steel plate | 3mm is thick | Arc die face plate is processed | |
| 6 | Steel plate | 2cm is thick | Arc mould floor is processed | |
| 7 | Equal leg angle | 4×4 | Arc mould is reinforced | |
| 8 | Channel-section steel | No. 8 | Arc mould handle and the end that is connected | |
| 9 | I-steel | No. 16 | Longeron is processed | Length 5m |
| 10 | Square steel | 6×4cm | Longeron I-steel connects | |
| 11 | Square steel | 2.5×4cm | Steel side waterstop is fixed |
3. plant equipment
Often locate inverted arch construction main mechanical configuration and be shown in Table 2.
Table 2 often locates inverted arch construction equipment allocation list
| Sequence number | Title | Quantity | Performance | Purposes | Remarks |
| 1 | Air pressure gun | 6 | Well | Inverted arch excavates perforating | |
| 2 | Excavator | 1 | Well | Inverted arch excavates, template lifting installation | |
| 3 | Dumper | 3 | Well | Inverted arch muck removal | |
| 4 | Electric welding machine | 2 | Well | Inverted arch reinforcement welding | |
| 5 | Concrete tank | 5 | Well | Transport concrete | |
| 6 | Concrete vibration stick | 3 | Well | Casting concrete |
4. quality control method
4.1 templates must carry out rational Design on Plane in advance, then strictly be pressed by the accurate Precision Machining of steel member processing factory, size
Planned according to design drawing, it is ensured that template has enough rigidity and intensity, while has the convenient performance installed and removed.
4.2 tunnel bottoms, which are excavated, will strictly control the laying of quick-fried eye and the control of explosive payload, it is ensured that the radian line of inverted arch after excavation
Shape, avoid out break.
After 4.3 tunnel bottoms are excavated in place, the empty quarrel of bottom must be cleaned out, the part backbreak must use same with inverted arch
The concrete backfill of label carries out C25 gunite concrete processing, ensures that substrate radian is smoother, closely knit.
It is firm that the not closely connected position of 4.4 inverted arch steelframe connecting plates must stopper full weld using band iron or reinforcing bar, it is ensured that the domain
Steelframe quality of connection.
After 4.5 model sheetinstallat per procedures, it is necessary to which whether correct, be linearly if going through model sheetinstallat position
No straight, whether connection and support are firm, it is ensured that after concreting form removal, the overall linear and presentation quality of inverted arch.
The position of 4.6 waterstop Embedded installations, absolute altitude must be accurate, and fixed necessary firm, overlap joint size, the depth of burying must
Code requirement must be met.
The speed and the frequency vibrated, especially two side wall arc moulds must be grasped in 4.7 inverted arch concreting processes
Position, it is impossible to vibrate too long and too big, cause concrete to be all lost in the integral curved knot in bottom, influenceing inverted arch concrete
Structure.
During 4.8 Central drain model sheetinstallats, middle hanging position must be supported firmly using support, be ensured
Central drain template is consolidated, and distortion will not be produced in concreting and is caved in.
Light sled will be rapped after 4.9 is complete per procedures, during form removal, on the one hand prevents long-time template deformation, on the other hand
Prevent from damaging finished product concrete.
This method combination design drawing and code requirement, inverted arch pouring construction is carried out using composite entity template, by inverted arch
And filling combination sizing end head formwork Combined machining is integrated, inverted arch avris arc mould is assembled by monolithic punching block, passes through longeron
Positioning is reinforced, the once elongated machine-shaping of Central drain template, realizes inverted arch end head formwork and Central drain template once mounting
In place, the easy effect of monolithic arc modulo operation.Construction speed and construction quality are effectively improved, cost has been saved, has dropped simultaneously
The low exceeded risk of safe step pitch, there is preferably high promotional value.
Claims (1)
- A kind of 1. pouring construction method of tunnel inverted arch composite entity template, it is characterised in that：The tunnel inverted arch composite entity mould Plate includes inverted arch and filling combination sizing end head formwork (1), inverted arch avris arc mould (2) and Central drain template (3),Described inverted arch and filling combination sizing end head formwork includes the inverted arch template of arc（1.1）And inverted arch template（1.1） The filled end mould of top（1.3）, inverted arch template（1.1）Bottom is provided with some reinforcing bar holes longitudinally disposed along circuit（1.4）, face upward Encircle template（1.1）Bottom is additionally provided with the waterstop clip slot set along inverted arch template arc（1.5）, inverted arch template（1.1）With filling Hold mould（1.3）Between be connected by platform steel plate, filled end mould（1.3）It is provided with the upside of middle part and is used to make the recessed of Central drain Groove；Described inverted arch avris arc mould（2）It is assembled for some small inverted arch avris arc moulds of section, often save small inverted arch avris arc mould bag Bracket panel（2.1）, curved panel（2.1）Interior side is welded with support frame（2.3）, support frame（2.3）Be welded with if by Dry small inverted arch avris arc mould connects integral longeron（2.2）；Described Central drain template（3）Side wall template including both sides（3.1）With the middle ditch template of bottom（3.2）, both sides Side wall template（3.1）Between use steel pipe（3.3）It is welded to connect, template suspension ring is welded with side wall template（3.4）；Filled end mould（1.3）Outside carries out three reinforcings using the thick steel plate of No. 5 equal leg angles and 5mm, and on filled end mould side Respectively symmetrically weld some suspension ring in edge（1.2）；Inverted arch and filling combination sizing end head formwork are defined by line midline and are divided into two pieces of left and right and are bolted, inverted arch mould Plate（1.1）The height of both sides is than filled end mould（1.3）High 40cm, the position as the two small abutment walls of lining；Described small inverted arch avris arc mould is provided with arc mould handle（2.4）；Described Central drain template（3）The side wall template of both sides（3.1）Between use steel pipe（3.3）Weld and connect by 1.0m spacing Connect, side wall template（3.1）On by 1.5m spacing be welded with template suspension ring（3.4）；Specific construction step is as follows：1）Process composite entity template：Processing including inverted arch and filling combination sizing end head formwork, inverted arch avris arc mould add The processing of work and Central drain template；2）Measurement and positioning unwrapping wire：Inverted arch carries out unwrapping wire before excavating to inverted arch excavation length, depth location, while in tunnel both sides Just branch carries out setting-out, and marked in face of inverted arch exposed steel bar absolute altitude, small abutment wall absolute altitude, blind pipe position；3）Inverted arch excavates and the cleaning of tunnel bottom：Inverted arch is excavated to after designed elevation, the empty quarrel of bottom is cleared up, the part backbreak With the concrete backfill of label or gunite concrete processing is carried out using with inverted arch, ensures that substrate radian is smoother, closely knit；4）Inverted arch steelframe and construction of shotcrete；5）Inverted arch and filling combination sizing end head formwork installation；6）The colligation of inverted arch reinforcing bar and waterstop installation：According to the reserved design steel of inverted arch and filling combination sizing end head formwork bottom Muscle hole spacing is positioned, colligation, welding, and reinforcing bar is interted in hole, as the overlap joint of the following group inverted arch reinforcing bar, in steel It is synchronous ring to be carried on the back into patch waterstop fixation is pushed down by inverted arch and filling combination sizing end head formwork during muscle colligation, in bury Formula rubber fastening band load inverted arch and filling combination sizing end head formwork ring waterstop clip slot, in buried rubber fastening band one Part is arranged in clip slot, and a part is arranged among inverted arch reinforcing bar；Longitudinal back-adhering waterstop by the good inverted arch of colligation outside Layer reinforcing bar, it is fixed using small angle steel and is fixedly mounted in first branch concrete surface, longitudinal back-adhering waterstop using square steel fixture；7）Inverted arch avris arc mould is installed：Inverted arch avris arc mould is uniformly connected by manually carrying out monolithic assembly, every piece of inverted arch avris arc mould An entirety is connected into, being aligned is installed by longeron and inverted arch avris arc mould, by the support frame of longeron bottom and the handle of arc mould Fixed to hold level with both hands after thick stick is connected with fastening, longeron one end of inverted arch avris arc mould is erected in the upper group of inverted arch constructed filling Face, one end is erected on filled end mould, to inverted arch avris arc mould enters row line, absolute altitude is fixed；8）Inverted arch concreting and maintenance；9）Inverted arch avris arc mould is removed and Central drain model sheetinstallat；After inverted arch concrete strength reaches initial setting strength, arc is carried out The dismounting of mould, synchronous to lift by crane Central drain template by excavator after arc mould is removed, hand fit's installation, Central drain template One end is erected the upper group of Central drain constructed position, and one end erects combines the recessed of sizing end head formwork in inverted arch and filling On groove, middle hanging part is supported using support to integral central ditch template, ensures the firm of Central drain template；10）Inverted arch fill concrete pours；11）The form removal of inverted arch entirety, maintenance.
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| CN106223960B (en) * | 2016-07-22 | 2018-12-04 | 中铁建大桥工程局集团第五工程有限公司 | High-speed rail major long tunnel inverted arch moves integrally mould bases construction |
| CN106677802B (en) * | 2016-12-28 | 2018-07-24 | 浙江沧海建设有限公司 | The construction method of tunnel inverted arch pouring structure |
| CN106884664B (en) * | 2017-02-27 | 2020-02-21 | 中铁十九局集团有限公司 | Tunnel inverted arch template and tunnel inverted arch filling rapid construction method |
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| CN114075984A (en) * | 2021-11-01 | 2022-02-22 | 中建五局土木工程有限公司 | Positioning end template of tunnel inverted arch end exposed steel bar and construction method |
| CN114251106B (en) * | 2021-12-09 | 2023-11-03 | 中交第二航务工程局有限公司 | Integral inverted arch end steel mould convenient to assemble and disassemble and construction method |
| CN115405334B (en) * | 2022-10-21 | 2024-06-04 | 中铁隧道局集团有限公司 | Construction method for on-site forming of central ditch of highway tunnel |
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