CN105134253A - Tunnel inverted arch combined integrated template and method for concreting construction - Google Patents
Tunnel inverted arch combined integrated template and method for concreting construction Download PDFInfo
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- CN105134253A CN105134253A CN201510399685.6A CN201510399685A CN105134253A CN 105134253 A CN105134253 A CN 105134253A CN 201510399685 A CN201510399685 A CN 201510399685A CN 105134253 A CN105134253 A CN 105134253A
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Abstract
The invention belongs to the technical field of tunnel construction, and particularly to a tunnel inverted arch combined integrated template and a method for concreting construction. The invention solve the problems in the prior art that small steel dies and wood dies are respectively used for tunnel inverted arch construction for many times, labor consumption and time consumption are waste and the efficiency of construction is low. A tunnel inverted arch combined integrated template comprises an inverted arch and filling combined fixing end template, an inverted arch side arc template and a center ditch template. An inverted arch template and a filling template are machined in one body, the center ditch template is formed through one time, an excavator is used for hoisting during construction, and workers cooperate with the excavator to mount in place at one time, the time for assembling/disassembling templates by workers can be effectively shortened, and the efficiency of the construction can be raised.
Description
Technical field
The invention belongs to technical field of tunnel construction, specifically a kind of tunnel invert composite entity template and pouring construction method.
Background technology
Along with the fast development of high-speed railway construction and taking place frequently of tunnel safety accident, more and more stricter to the requirement of tunnel safety step pitch, the speed of application close inverted arch after tunnel excavation and quality etc. require also more and more high.Traditional little punching block and wooden model combine piecemeal gradation and carry out tunnel invert construction, not only time-consuming, and in construction, repeatedly carry out inverted arch and installation, the dismounting of filling end head formwork, the merogenesis of Central drain template is assembled, dismounting, operation is various, and construction speed is slow, and safe step pitch is seriously delayed, difficult quality guarantee simultaneously, wooden arc mould waste is also obvious.
Summary of the invention
The present invention combines piecemeal gradation carry out tunnel invert construction, the problem that time-consuming and efficiency of construction is slow to solve traditional little punching block and wooden model, provides a kind of tunnel invert composite entity template and pouring construction method.
The present invention takes following technical scheme: a kind of tunnel invert composite entity template, comprises inverted arch and fills combination sizing end head formwork, inverted arch avris arc mould and Central drain template.
Described inverted arch and fill combination sizing end head formwork and comprise filled end mould above the invert form of arc and invert form, some reinforcing bar holes longitudinally arranged along circuit are provided with bottom invert form, the waterstop clip slot arranged along invert form arc is also provided with bottom invert form, be connected by platform steel plate between invert form with filled end mould, in the middle part of filled end mould, upside is provided with the groove for making Central drain.
Described inverted arch avris arc mould is that some joints little inverted arch avris arc mould is assembled, and often save little inverted arch avris arc mould and comprise curved panel, in curved panel, side is welded with bracing frame, bracing frame is welded with some little inverted arch avris arc moulds are connected into overall longeron.
Described Central drain template comprises the sidewall template of both sides and the middle ditch template of bottom, connects, sidewall template is welded with template suspension ring between the sidewall template of both sides with steel-pipe welding.
Adopt No. 5 equal leg angles and the thick steel plate of 5mm to carry out three road reinforcings outside filled end mould, and be symmetrically welded some suspension ring respectively at filled end mould edge.
Inverted arch and filling combination sizing end head formwork are as the criterion with line midline and are divided into two pieces, left and right and are bolted, the aspect ratio filled end mould height 40cm of invert form both sides, as the position of the little abutment wall of two linings.
Described little inverted arch avris arc mould is provided with arc mould handle.
Be welded to connect by the spacing of steel pipe by 1.0m between the sidewall template of described Central drain template both sides, sidewall template is being welded with template suspension ring by the spacing of 1.5m.
A pouring construction method for tunnel invert composite entity template, construction sequence is as follows: 1) process composite entity template; 2) measurement and positioning unwrapping wire; 3) clear up at the bottom of inverted arch excavation and tunnel; 4) inverted arch steelframe and construction of shotcrete; 5) inverted arch and filling combination sizing end head formwork are installed; 6) inverted arch reinforcing bar binding and waterstop are installed; 7) inverted arch avris arc mould is installed; 8) inverted arch concreting and maintenance; 9) inverted arch avris arc mould is removed and middle ditch model sheetinstallat; 10) inverted arch fill concrete is built; 11) the overall form removal of inverted arch, maintenance.
Specific construction step is as follows:
1) composite entity template is processed: the processing comprising inverted arch and filled end mould, the processing of inverted arch avris arc mould and the processing of Central drain template;
2) measurement and positioning unwrapping wire: carry out unwrapping wire to inverted arch excavation length, depth location before inverted arch excavation, carries out setting-out at first of both sides, tunnel in the face of inverted arch exposed steel bar absolute altitude, little abutment wall absolute altitude, blind pipe position, and marks simultaneously;
3) clear up at the bottom of inverted arch excavation and tunnel: after inverted arch excavates design elevation, clear up the void quarrel of bottom, the part employing of backbreaking and inverted arch are with the concrete backfill of label or carry out sprayed mortar process, ensure 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 are installed;
6) inverted arch reinforcing bar binding and waterstop are installed: position according to reserved design reinforcing bar hole spacing bottom inverted arch and filling combination sizing end head formwork, colligation, welding, and reinforcing bar is interted in hole, as the overlap joint of lower group of inverted arch reinforcing bar, in the process of reinforcing bar binding, synchronously the hoop back of the body being pasted waterstop pushes down fixing by inverted arch and filling combination sizing end head formwork, in buried rubber fastening band load inverted arch and fill the hoop waterstop clip slot of combination sizing end head formwork, in a buried rubber fastening band part be arranged in clip slot, a part is arranged in the middle of inverted arch reinforcing bar, longitudinal back-adhering waterstop is by the good inverted arch outer reinforcement of colligation, and adopt little angle steel to be fixed at a first concrete surface, longitudinal back-adhering waterstop adopts square steel fixture fixed installation.
7) inverted arch avris arc mould is installed: inverted arch avris arc mould is assembled by manually carrying out monolithic, every block avris arc mould is unified connects into an entirety, by longeron and inverted arch avris arc mould, being aligned is installed, by the bracing frame bottom longeron and the flat thick stick of the handle securement end of arc mould with bolt be connected fastening after, longeron one end-rack of inverted arch avris arc mould stands in the inverted arch that group constructed and fills face, one end-rack stands on inverted arch end mould, carries out circuit, absolute altitude fixes to inverted arch avris arc mould;
8) inverted arch concreting and maintenance;
9) inverted arch avris arc mould is removed and middle ditch model sheetinstallat; After inverted arch concrete strength reaches initial setting strength, carry out the dismounting of arc mould, after arc mould is removed, synchronously Central drain template is lifted by crane by excavator, hand fit installs, and Central drain template one end-rack stands in the Central drain position that group has been constructed, and an end-rack stands in inverted arch and fills on the groove of combination sizing end head formwork, middle hanging part adopts support to support ditch template in entirety, and in guarantee, ditch template is firm;
10) inverted arch fill concrete is built;
11) the overall form removal of inverted arch, maintenance.
Compared with prior art, the benefit that has of the present invention is as follows:
1. invert form and filling template Combined machining are integrated by composite entity template, Central drain template is elongated machine-shaping once, excavator lifting in construction, and hand fit's once mounting puts in place, effectively shorten the activity duration of artificial block-by-block template assembly, dismounting, improve efficiency of construction.
2. inverted arch avris arc mould is assembled by monolithic, and reinforce location by longeron, monolithic arc modulo operation is easy, effectively can control inverted arch abutment wall radian, is connected good, construction quality successful with bottom barrel lining cutting.
3. hoop waterstop in inverted arch termination adopts Template Location, and longitudinal waterstop adopts positioning fixture to fix, and make waterstop installation site accurate, fixed, radian and linear criterion, construction quality is better, and waterproof effect is obvious.
4. stencil design is ingenious, is convenient to assembling and disassembling, and construction technology is easily grasped, and is convenient to organization and administration, can effectively improve construction speed and construction quality, cost-saving, reduces the risk that safe step pitch exceeds standard simultaneously, has very large economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is inverted arch and fills overall profile inside combination sizing end head formwork;
Fig. 2 is inverted arch and fills overall profile outside combination sizing end head formwork;
Fig. 3 is inverted arch and fills left side profile inside combination sizing end head formwork;
Fig. 4 is inverted arch and fills combination sizing end head formwork left outer half portion profile;
Fig. 5 is A-A sectional schematic diagram;
Fig. 6 is inverted arch avris arc mould profile;
Fig. 7 is inverted arch abutment wall arc mould top plan view;
Fig. 8 is that top plan view reinforced by inverted arch abutment wall arc mould i iron;
Fig. 9 is Central drain template profile;
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 profile;
1-inverted arch and filling combination sizing end head formwork in figure, 2-inverted arch avris arc mould, 3-Central drain template, 4-has constructed inverted arch, 1.1-invert form, 1.2-suspension ring, 1.3-filled end mould, 1.4-reinforcing bar hole, 1.5-waterstop clip slot, 2.1-curved panel, 2.2-longeron, 2.3-bracing frame, 2.4-arc mould handle, 3.1-sidewall template, ditch template in 3.2-, 3.3-steel pipe 3.4-template suspension ring.
Detailed description of the invention
A kind of tunnel invert composite entity template, comprises inverted arch and fills 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 fill combination sizing end head formwork and comprise filled end mould 1.3 above the invert form 1.1 of arc and invert form 1.1, some reinforcing bar holes 1.4 longitudinally arranged along circuit are provided with bottom invert form 1.1, the waterstop clip slot 1.5 arranged along invert form arc is also provided with bottom invert form 1.1, be connected by platform steel plate between invert form 1.1 with filled end mould 1.3, in the middle part of filled end mould 1.3, upside is provided with the groove for making Central drain.
As shown in Figure 6,7, described inverted arch avris arc mould 2 is that some joints little inverted arch avris arc mould is assembled, often save little inverted arch avris arc mould and comprise curved panel 2.1, in curved panel 2.1, side is welded with bracing frame 2.3, bracing frame 2.3 is welded with some little inverted arch avris arc moulds are connected into overall longeron 2.2.
As shown in Fig. 9,10, described Central drain template 3 comprises the sidewall template 3.1 of both sides and the middle ditch template 3.2 of bottom, is welded to connect, sidewall template is welded with template suspension ring 3.4 between the sidewall template 3.1 of both sides with steel pipe 3.3.
Adopt No. 5 equal leg angles and the thick steel plate of 5mm to carry out three road reinforcings outside filled end mould 1.3, and be symmetrically welded some suspension ring 1.2 respectively at filled end mould edge.
Inverted arch and filling combination sizing end head formwork are as the criterion with line midline and are divided into two pieces, left and right and are bolted, the high 40cm of aspect ratio filled end mould 1.3 of invert form 1.1 both sides, as the position of the little abutment wall of two linings.
Described little inverted arch avris arc mould is provided with arc mould handle 2.4.
Be welded to connect by the spacing of steel pipe 3.3 by 1.0m between the sidewall template 3.1 of described Central drain template 3 both sides, sidewall template 3.1 is being welded with template suspension ring 3.4 by the spacing of 1.5m.
A pouring construction method for tunnel invert composite entity template, construction sequence is as follows: 1) process composite entity template; 2) measurement and positioning unwrapping wire; 3) clear up at the bottom of inverted arch excavation and tunnel; 4) inverted arch steelframe and construction of shotcrete; 5) inverted arch and filling combination sizing end head formwork are installed; 6) inverted arch reinforcing bar binding and waterstop are installed; 7) inverted arch avris arc mould is installed; 8) inverted arch concreting and maintenance; 9) inverted arch avris arc mould is removed and middle ditch model sheetinstallat; 10) inverted arch fill concrete is built; 11) the overall form removal of inverted arch, maintenance.
Specific construction step is as follows:
1) composite entity template is processed: the processing comprising inverted arch and filled end mould, the processing of inverted arch avris arc mould and the processing of Central drain template.
2) measurement and positioning unwrapping wire: carry out unwrapping wire to inverted arch excavation length, depth location before inverted arch excavation, carries out setting-out at first of both sides, tunnel in the face of inverted arch exposed steel bar absolute altitude, little abutment wall absolute altitude, blind pipe position, and marks simultaneously.
3) clear up at the bottom of inverted arch excavation and tunnel: after inverted arch excavates design elevation, clear up the void quarrel of bottom, the part employing of backbreaking and inverted arch are with the concrete backfill of label or carry out sprayed mortar process, ensure 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 are installed.
6) inverted arch reinforcing bar binding and waterstop are installed: position according to reserved design reinforcing bar hole spacing bottom inverted arch and filling combination sizing end head formwork, colligation, welding, and reinforcing bar is interted in hole, as the overlap joint of lower group of inverted arch reinforcing bar, in the process of reinforcing bar binding, synchronously the hoop back of the body being pasted waterstop pushes down fixing by inverted arch and filling combination sizing end head formwork, in buried rubber fastening band load inverted arch and fill the hoop waterstop clip slot of combination sizing end head formwork, in a buried rubber fastening band part be arranged in clip slot, a part is arranged in the middle of inverted arch reinforcing bar, longitudinal back-adhering waterstop is by the good inverted arch outer reinforcement of colligation, and adopt little angle steel to be fixed at a first concrete surface, longitudinal back-adhering waterstop adopts square steel fixture fixed installation.
7) inverted arch avris arc mould is installed: inverted arch avris arc mould is assembled by manually carrying out monolithic, every block avris arc mould is unified connects into an entirety, by longeron and inverted arch avris arc mould, being aligned is installed, by the bracing frame bottom longeron and the flat thick stick of the handle securement end of arc mould with bolt be connected fastening after, longeron one end-rack of inverted arch avris arc mould stands in the inverted arch that group constructed and fills face, one end-rack stands on inverted arch end mould, carries out circuit, absolute altitude fixes to inverted arch avris arc mould.(as shown in figure 11)
8) inverted arch concreting and maintenance.
9) inverted arch avris arc mould is removed and middle ditch model sheetinstallat; After inverted arch concrete strength reaches initial setting strength, carry out the dismounting of arc mould, after arc mould is removed, synchronously Central drain template is lifted by crane by excavator, hand fit installs, and Central drain template one end-rack stands in the Central drain position that group has been constructed, and an end-rack stands in inverted arch and fills on the groove of combination sizing end head formwork, middle hanging part adopts support to support ditch template in entirety, and in guarantee, ditch template is firm.
10) inverted arch fill concrete is built.
11) the overall form removal of inverted arch, maintenance.
1.1 processing composite entity templates
1.1.1 inverted arch and the processing of filling combination sizing end head formwork
According to the requirement of Tunnel Design drawing, the leveling layer of inverted arch and the rear reserved 40cm of filling construction, end head formwork is designed to entire combination set shaped steel formwork, is integrated by the end mould of inverted arch and filling, both sides inverted arch exceeds 40cm than filling, as the position of the little abutment wall of two linings.The unified thick steel plate of 5mm that adopts of template forms by inverted arch and filling radian integral solder, and be as the criterion with line midline, be divided into two pieces, left and right, centre reserves the position of Central drain, and the bolt of the overall Φ 22 of employing connects.
Be connected by the platform steel plate that 50cm is wide between invert form with filled end mould, invert form reserves the dark hoop waterstop clip slot of 15cm in inner side, simultaneously by the spacing of design inverted arch reinforcing bar, reserves the hole that reinforcing bar interts respectively.Outside filling template, monolithic adopts No. 5 equal leg angles and the thick steel plate of 5mm to carry out three road reinforcings, and adopts Φ 22 screw-thread steel to weld two suspension ring respectively at template edge, is convenient to template lifting and installs.
1.1.2 inverted arch avris arc mould processing
Inverted arch avris arc mould presses the processing of 1.0m × 1.5m size monoblock design, and every block arc mould adopts 3mm steel plate curved arc to do panel, the processing of 2cm steel plate do sizing floor according to design radian, and avris adopts 4 × 4 equal leg angles to reinforce.Every block arc mould two bottom sides adopts No. 8 channel-section steels weld handle respectively and be connected and fixed end, and the bolt hole of reserved Φ 22 respectively at the two ends of channel-section steel horizontal fixed end, is convenient to lower step arc mould and longitudinal crossbeam is connected and fixed.
Construction length is allowed according to inverted arch in design specifications and associated documents, two 16 i iron are adopted to carry out longitudinal crossbeam processing with the pattern of long ladder by 5m length, bottom connects two i iron weldings respectively with No. 8 channel-section steels, top 6 × 4 square steel, i iron spacing is as the criterion with the length of the flat thick stick of monolithic arc mould handle securement end, No. 8 channel-section steel welding positions simultaneously bottom longitudinal crossbeam must be corresponding with it, and the reserved bolt hole corresponding with it, be convenient to arc mould and longitudinal crossbeam integrated connection in model sheetinstallat and fix.
1.1.3 Central drain template is processed
Central drain template adopts 5mm steel plate, and the 5m length integral solder processing that size presses design drawing, length is constructed according to inverted arch, middle spacing and the Zhong Gou two side template firm welding adopting Ф 32 steel pipe to press 1.0m, as shuttering supporting steel part.Adopt the screw-thread steel of Ф 22 firmly to weld, as template suspension ring on middle ditch two side template limit by the spacing of 1.5m simultaneously.
1.2 measurement and positioning unwrapping wire
Before inverted arch excavation, unwrapping wire is carried out to inverted arch excavation length, depth location, carry out setting-out at first of both sides, tunnel in the face of inverted arch exposed steel bar absolute altitude, little abutment wall absolute altitude, blind pipe position, and paint mark simultaneously.
Clear up at the bottom of 1.3 inverted arch excavations and tunnel
Inverted arch excavation adopts blast working according to country rock soft or hard degree, hand fit's mechanical work.After excavating design elevation at the bottom of inverted arch tunnel, clear up the void quarrel of bottom, the part employing of backbreaking and inverted arch are with the concrete backfill of label or carry out the process of C25 sprayed mortar, ensure that substrate radian is smoother, closely knit.
1.4 inverted arch steelframe and construction of shotcrete
After tunnel bottom application work puts in place, inverted arch steelframe with under the steelframe of leading along connecing installation, during installation, each junction plate of steelframe must be closely connected, especially inverted arch steelframe with just under lead bow member junction plate joint and be connected and must meet test standard requirement, junction plate position has individually space not closely connected, adopt band iron or reinforcing bar jam-pack full weld firm.
Steelframe is in place after acceptance(check), carries out inverted arch and just props up concrete injection, and notice time in course of injection that pneumatically placed concrete and inverted arch just prop up distance and the angle in face, surface is smoother, closely knit, especially inverted arch tip position, is convenient to the installation of lower step template.
1.5 inverted arch end moulds are installed
Inverted arch end mould adopts excavator lifting, and hand fit installs.Be as the criterion with tunnel line center line, after location is installed in the lifting of two pieces of end moulds, medial and lateral adopt steel pipe diagonal brace to fix respectively, and two pieces of templates are connected into entirety by the bolt of Φ 22 by centre.
1.6 inverted arch reinforcing bar bindings and waterstop are installed
Inverted arch reinforcing bar carries out pre-bending processing according to design drawing, position according to design reinforcing bar hole spacing reserved bottom inverted arch end mould, colligation, welding, and reinforcing bar is interted in hole, as the overlap joint of lower group of inverted arch reinforcing bar.In the process of reinforcing bar binding, synchronously the hoop back of the body is pasted waterstop fixing by holding mold pressing to live, in buried rubber fastening band load the clip slot of inverted arch end mould, waterstop 15cm is in clip slot, and 15cm is in the middle of inverted arch reinforcing bar.
Longitudinal back-adhering waterstop, by the good inverted arch outer reinforcement of colligation, adopts little angle steel to be fixed at a first concrete surface.Steel limit waterstop adopts two 2.5 × 4cm square steel to be clipped in the middle, and fixedly tightens between two square steel with bolt, straight to ensure steel limit waterstop; Connection between adjacent waterstop adopts rivet interlacement, and lap length is not less than 30cm.
1.7 inverted arch avris arc moulds are installed
Avris arc mould is assembled by manually carrying out monolithic, and every block arc intermode connects into an entirety by the bolt of Φ 22 is unified.Synchronous longeron and arc mould install being aligned, by the channel-section steel bottom longeron and the flat thick stick of the handle securement end of arc mould with bolt be connected fastening after, longeron one end-rack stands in the inverted arch that group constructed and fills face, and an end-rack stands on inverted arch end mould, carries out circuit, absolute altitude fixes to arc mould.
1.8 inverted arch concreting and maintenances
Carefully to check before building inverted arch concrete whether correct waterstop, embedding pipe fittings are installed, and whether firmly end mould, arc mould are reinforced, with or without omission.Check that inspection declaration can carry out concreting after qualified, the speed of vibrating and the frequency must be grasped in concreting process, especially both sides abutment wall arc mould position, can not vibrate too for a long time with too large, cause concrete all to run off in bottom, affect the concrete integral curved structure of inverted arch.
1.9 avris arc moulds are removed and middle ditch model sheetinstallat
After inverted arch concrete strength reaches initial setting strength, carry out the dismounting of arc mould.First will tear longeron open during form removal, a dead lift is removed, and then block-by-block removes arc mould, will rap light sled, prevent long-lasting operation from causing template deformation in demolishing process.
Central drain template is synchronously lifted by crane by excavator after removing by arc mould, and hand fit installs.Central drain template is the same with the longeron of arc mould, and an end-rack stands in the Central drain position that group has been constructed, and an end-rack stands in inverted arch end mould on ditch draw-in groove, and middle hanging part adopts support to support ditch template in entirety, and in guarantee, ditch template is firm.
1.10 inverted arch fill concretes are built
Inverted arch fill concrete is by agitator centralized mixing, and concrete transport vehicle is transported to job site, chute blanking, and poker vibrator vibration compacting reaches after absolute altitude until concreting, carries out receipts face in time.
The overall form removal of 1.11 inverted arch, maintenance
After fill concrete intensity reaches 50% of design strength, then carry out form removal; Inverted arch end head formwork and middle ditch template all adopt excavator lifting, hand fit removes, has bad luck.Consider the traveling of vehicle on inverted arch after form removal, can cover one deck steel plate at traveling-position, prevent vehicle traveling from causing inverted arch and roll, synchronously take to inverted arch fill concrete maintenance of sprinkling water, maintenance number of days is no less than 14 days.
2. construction material
The processing of inverted arch composite entity template mainly needs construction material in table 1.
Table 1 inverted arch composite entity template 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 filled end mould, the processing of middle ditch template | |
| 2 | Equal leg angle | No. 5 | Inverted arch and filled end mould are reinforced | |
| 3 | Bolt | Φ22 | End mould, arc mould connect | |
| 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 be connected and fixed end | |
| 9 | I iron | No. 16 | Longeron is processed | Length 5m |
| 10 | Square steel | 6×4cm | Longeron i iron connects | |
| 11 | Square steel | 2.5×4cm | Steel limit waterstop is fixed |
3. plant equipment
Often locate the configuration of inverted arch construction main mechanical in table 2.
Inverted arch construction equipment allocation list often located by table 2
| Sequence number | Title | Quantity | Performance | Purposes | Remarks |
| 1 | Air pressure gun | 6 | Well | The perforating of inverted arch excavation | |
| 2 | Excavator | 1 | Well | Inverted arch excavation, template lifting are installed | |
| 3 | Tipping truck | 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 | Concreting |
4. quality control method
4.1 templates must carry out rational Design on Plane in advance, then by the accurate Precision Machining of steel beam column processing factory, size is planned in strict accordance with design drawing, guarantee that template has enough Rigidity and strengths, have the performance facilitating installation and removal simultaneously.
At the bottom of 4.2 tunnels, excavation strictly will control the laying of quick-fried eye and the control of explosive payload, guarantees that the radian excavating rear inverted arch is linear, avoids out break.
After at the bottom of 4.3 tunnels, excavation puts in place, must clean out the void of bottom quarrel, the part of backbreaking must to adopt with inverted arch with the concrete backfill of label or carry out the process of C25 sprayed mortar, ensures that substrate radian is smoother, closely knit.
The not closely connected position of 4.4 inverted arch steelframe junction plates must adopt band iron or reinforcing bar jam-pack full weld firm, guarantee domain steelframe quality of connection.
After the model sheetinstallat of 4.5 every procedures, all carefully must check that whether model sheetinstallat position is correct, linearly whether straight, connect and whether firmly support, after guaranteeing concreting form removal, the linear and presentation quality of inverted arch entirety.
Position, the absolute altitude of 4.6 waterstop Embedded installation must accurately, and fixing firmly necessary, overlap joint size, the depth of burying must meet code requirement.
The speed and the frequency of vibrating must be grasped in 4.7 inverted arch concreting processes, especially both sides abutment wall arc mould position, can not vibrate too for a long time and too greatly, cause concrete all to run off in bottom, affect the concrete integral curved structure of inverted arch.
In 4.8 Central drain model sheetinstallat processes, middle unsettled position must adopt support to carry out firm supporting, and in guarantee, ditch template is firm, can not produce distortion and cave in when concreting.
After 4.9 every procedures are complete, during form removal, all to rap light sled, prevent long-time template deformation on the one hand, prevent from the other hand damaging finished product concrete.
This method is in conjunction with design drawing and code requirement, composite entity template is adopted to carry out inverted arch pouring construction, inverted arch and filling combination sizing end head formwork Combined machining are integrated, inverted arch avris arc mould is assembled by monolithic punching block, location is reinforced by longeron, Central drain template is elongated machine-shaping once, realizes inverted arch end head formwork and Central drain template once mounting puts in place, the effect that monolithic arc modulo operation is easy.Effectively improve construction speed and construction quality, saved cost, reduce the risk that safe step pitch exceeds standard simultaneously, there is better high promotional value.
Claims (7)
1. a tunnel invert composite entity template, is characterized in that: comprise inverted arch and fill 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 comprise the invert form (1.1) of arc and the filled end mould (1.3) of invert form (1.1) top, invert form (1.1) bottom is provided with some reinforcing bar holes (1.4) longitudinally arranged along circuit, invert form (1.1) bottom is also provided with the waterstop clip slot (1.5) arranged along invert form arc, be connected by platform steel plate between invert form (1.1) with filled end mould (1.3), upside, filled end mould (1.3) middle part is provided with the groove for making Central drain;
Described inverted arch avris arc mould (2) for some joints little inverted arch avris arc mould assembled, often save little inverted arch avris arc mould and comprise curved panel (2.1), curved panel (2.1) interior side is welded with bracing frame (2.3), bracing frame (2.3) is welded with some little inverted arch avris arc moulds are connected into overall longeron (2.2);
Described Central drain template (3) comprises the sidewall template (3.1) of both sides and the middle ditch template (3.2) of bottom, is welded to connect, sidewall template is welded with template suspension ring (3.4) between the sidewall template (3.1) of both sides with steel pipe (3.3).
2. tunnel invert composite entity template according to claim 1, is characterized in that: filled end mould (1.3) outside adopts No. 5 equal leg angles and the thick steel plate of 5mm to carry out three road reinforcings, and is symmetrically welded some suspension ring (1.2) respectively at filled end mould edge.
3. tunnel invert composite entity template according to claim 1 and 2, it is characterized in that: inverted arch and filling combination sizing end head formwork are as the criterion with line midline and are divided into two pieces, left and right and are bolted, aspect ratio filled end mould (1.3) the high 40cm of invert form (1.1) both sides, as the position of the little abutment wall of two linings.
4. tunnel invert composite entity template according to claim 3, is characterized in that: described little inverted arch avris arc mould is provided with arc mould handle (2.4).
5. tunnel invert composite entity template according to claim 4, it is characterized in that: be welded to connect by the spacing of 1.0m with steel pipe (3.3) between the sidewall template (3.1) of described Central drain template (3) both sides, sidewall template (3.1) is being welded with template suspension ring (3.4) by the spacing of 1.5m.
6. a pouring construction method for tunnel invert composite entity template as claimed in claim 5, is characterized in that: construction sequence is as follows: 1) process composite entity template; 2) measurement and positioning unwrapping wire; 3) clear up at the bottom of inverted arch excavation and tunnel; 4) inverted arch steelframe and construction of shotcrete; 5) inverted arch and filling combination sizing end head formwork are installed; 6) inverted arch reinforcing bar binding and waterstop are installed; 7) inverted arch avris arc mould is installed; 8) inverted arch concreting and maintenance; 9) inverted arch avris arc mould is removed and middle ditch model sheetinstallat; 10) inverted arch fill concrete is built; 11) the overall form removal of inverted arch, maintenance.
7. a kind of tunnel invert composite entity template pouring construction method according to claim 6, is characterized in that: Specific construction step is as follows:
1) composite entity template is processed: the processing comprising inverted arch and filled end mould, the processing of inverted arch avris arc mould and the processing of Central drain template;
2) measurement and positioning unwrapping wire: carry out unwrapping wire to inverted arch excavation length, depth location before inverted arch excavation, carries out setting-out at first of both sides, tunnel in the face of inverted arch exposed steel bar absolute altitude, little abutment wall absolute altitude, blind pipe position, and marks simultaneously;
3) clear up at the bottom of inverted arch excavation and tunnel: after inverted arch excavates design elevation, clear up the void quarrel of bottom, the part employing of backbreaking and inverted arch are with the concrete backfill of label or carry out sprayed mortar process, ensure 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 are installed;
6) inverted arch reinforcing bar binding and waterstop are installed: position according to reserved design reinforcing bar hole spacing bottom inverted arch and filling combination sizing end head formwork, colligation, welding, and reinforcing bar is interted in hole, as the overlap joint of lower group of inverted arch reinforcing bar, in the process of reinforcing bar binding, synchronously the hoop back of the body being pasted waterstop pushes down fixing by inverted arch and filling combination sizing end head formwork, in buried rubber fastening band load inverted arch and fill the hoop waterstop clip slot of combination sizing end head formwork, in a buried rubber fastening band part be arranged in clip slot, a part is arranged in the middle of inverted arch reinforcing bar, longitudinal back-adhering waterstop is by the good inverted arch outer reinforcement of colligation, and adopt little angle steel to be fixed at a first concrete surface, longitudinal back-adhering waterstop adopts square steel fixture fixed installation,
7) inverted arch avris arc mould is installed: inverted arch avris arc mould is assembled by manually carrying out monolithic, every block inverted arch avris arc mould is unified connects into an entirety, by longeron and inverted arch avris arc mould, being aligned is installed, by the bracing frame bottom longeron and the flat thick stick of the handle securement end of arc mould with bolt be connected fastening after, longeron one end-rack of inverted arch avris arc mould stands in the inverted arch that group constructed and fills face, one end-rack stands on inverted arch end mould, carries out circuit, absolute altitude fixes to inverted arch avris arc mould;
8) inverted arch concreting and maintenance;
9) inverted arch avris arc mould is removed and middle ditch model sheetinstallat; After inverted arch concrete strength reaches initial setting strength, carry out the dismounting of arc mould, after arc mould is removed, synchronously Central drain template is lifted by crane by excavator, hand fit installs, and Central drain template one end-rack stands in the Central drain position that group has been constructed, and an end-rack stands in inverted arch and fills on the groove of combination sizing end head formwork, middle hanging part adopts support to support ditch template in entirety, and in guarantee, ditch template is firm;
10) inverted arch fill concrete is built;
11) the overall form removal of inverted arch, maintenance.
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| CN106223960A (en) * | 2016-07-22 | 2016-12-14 | 中铁建大桥工程局集团第五工程有限公司 | High ferro major long tunnel inverted arch moves integrally mould bases construction |
| CN106677802A (en) * | 2016-12-28 | 2017-05-17 | 杭州江润科技有限公司 | Construction method of tunnel inverted arch pouring structure |
| CN106884664A (en) * | 2017-02-27 | 2017-06-23 | 中铁十九局集团有限公司 | Tunnel overhead arch mould plate and tunnel inverted arch filling rapid constructing method |
| CN107355238A (en) * | 2017-09-08 | 2017-11-17 | 中车建设工程有限公司 | Tunnel inverted arch abutment wall entirety punching block and its 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 |
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| CN106223960A (en) * | 2016-07-22 | 2016-12-14 | 中铁建大桥工程局集团第五工程有限公司 | High ferro major long tunnel inverted arch moves integrally mould bases construction |
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| CN106884664A (en) * | 2017-02-27 | 2017-06-23 | 中铁十九局集团有限公司 | Tunnel overhead arch mould plate and tunnel inverted arch filling rapid constructing method |
| CN107524458A (en) * | 2017-08-30 | 2017-12-29 | 中铁二院工程集团有限责任公司 | A kind of tunnel lining structure with tunnel bottom deformation allowance |
| CN107524458B (en) * | 2017-08-30 | 2023-09-22 | 中铁二院工程集团有限责任公司 | Tunnel lining structure with tunnel bottom reserved deformation |
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| CN108561156B (en) * | 2018-04-30 | 2024-03-19 | 安徽省公路桥梁工程有限公司 | Separated tunnel arch-changing supporting structure and construction method thereof |
| CN110593902A (en) * | 2019-09-25 | 2019-12-20 | 中铁隧道集团三处有限公司 | Construction method for filling inverted arch and integrally pouring |
| CN110593902B (en) * | 2019-09-25 | 2021-11-05 | 中铁隧道集团三处有限公司 | Construction method for filling inverted arch and integrally pouring |
| CN111058867A (en) * | 2019-12-26 | 2020-04-24 | 中建四局土木工程有限公司 | Tunnel construction method based on end template |
| CN111691902A (en) * | 2020-06-04 | 2020-09-22 | 中交一公局集团有限公司 | Tunnel inverted arch construction process |
| CN111622786A (en) * | 2020-06-05 | 2020-09-04 | 中铁十二局集团有限公司 | Arch connecting plate angle positioning device and angle positioning method |
| CN111622786B (en) * | 2020-06-05 | 2022-06-14 | 中铁十二局集团有限公司 | Arch connecting plate angle positioning device and angle positioning method |
| CN112458834B (en) * | 2020-11-13 | 2022-02-08 | 中国铁建股份有限公司 | Hopper device for tunnel inverted arch cushion layer laying and construction method |
| CN112177629B (en) * | 2020-11-13 | 2022-06-14 | 中国铁建股份有限公司 | Hopper structure for tunnel inverted arch cushion layer laying and construction method |
| CN112458834A (en) * | 2020-11-13 | 2021-03-09 | 中国铁建股份有限公司 | Hopper device for tunnel inverted arch cushion layer laying and construction method |
| CN112177629A (en) * | 2020-11-13 | 2021-01-05 | 中国铁建股份有限公司 | Hopper structure for tunnel inverted arch cushion layer laying and construction method |
| 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 |
| CN114251106A (en) * | 2021-12-09 | 2022-03-29 | 中交第二航务工程局有限公司 | Integral inverted arch end steel die convenient to mount and dismount 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 |
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