CN109653770A - A kind of middle board construction method carried out using original temporary support - Google Patents
A kind of middle board construction method carried out using original temporary support Download PDFInfo
- Publication number
- CN109653770A CN109653770A CN201811582394.0A CN201811582394A CN109653770A CN 109653770 A CN109653770 A CN 109653770A CN 201811582394 A CN201811582394 A CN 201811582394A CN 109653770 A CN109653770 A CN 109653770A
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- China
- Prior art keywords
- template
- temporary support
- support
- original
- bracket
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining 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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/12—Temporary supports for use during building; Accessories
Abstract
The invention discloses a kind of middle board construction methods carried out using original temporary support, five operating procedures are amounted to by the dismounting of the installation of bracket, the installation of template, the installation of reinforcing bar, the pouring construction of middle plate and template and bracket, realize the construction operation of plate in tunnel, the technical solution utilizes original gib system, reduces construction risk；Optimized construction procedure greatly reduces middle plate construction bracket and transports, sets up again, shortens the construction period；In conjunction with original gib system, hardened structure, the stability of calculating analysis bracket carry out consolidation process to weakness in；Plate in section development can be jumped using original excavation construction channel to construct, and carried out more work surfaces, multi-process rapidly while being constructed；It removed again after the completion of middle plate, transport lower part temporary support, no cross-operation, safely controllable property height.
Description
Technical field
The present invention relates to tunnelling construction technique field more particularly to a kind of middle plates carried out using original temporary support
Construction method.
Background technique
Gong Bei tunnel excavation section is upper and lower lamination tunnel.It finishes after reaching middle plate construction requirement and opens after inverted arch, side wall construction
Beginning applies plate in structure, and temporary support is not removed under middle plate, guarantees tunnel by the support system formed using the temporary support
Liner structure stable system applies putting up platform bracket in the temporary support that do not remove, builds middle plate using Support Method mould, reduces
The risk that may cause because removing temporary support, optimized construction procedure shorten the construction period.
Summary of the invention
The object of the present invention is to provide a kind of middle board construction method carried out using original temporary support, using original interim
Plate construction reduces operating risk to ensure the integrally-built stability in tunnel in the progress of supporting erection strutting system.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of middle board construction method carried out using original temporary support of the present invention, including following implementation steps:
Step 1, the installation of bracket, adjacent original temporary support is as operation platform under plate in, firstly, abolishing
Concrete in original temporary support simultaneously retains the steel coupling part between stull and perpendicular support, the stull in original temporary support
Temporary support is increased newly in the connection of two side lower parts, then releases the connection between the stull and two sides side wall, while reinforcing the original
There is the connection between the perpendicular support in temporary support and newly-increased temporary support and lower section inverted arch, original temporary support is faced with newly-increased
When support to form stable support system；
Then, in the two sides of the support system and top setting support, the bracket includes upper bracket and side stand, institute
It states above the stull that upper bracket is mounted in original temporary support, the lower bracket is mounted on the newly-increased temporary support
The outside of perpendicular support；
Step 2, the installation of template after the bracket is installed, carry out the spelling of template after city's roads adjustment is qualified
It fills, template assembly described in muti-piece is connected on the left and right side of the bracket；
Step 3, the installation of reinforcing bar start to install reinforcing bar on the template after the completion of the formwork erection on the upper bracket,
Standard concrete cushion block interval is used between the reinforcing bar and template；
Step 4, the pouring construction of middle plate, the template on reinforcing bar and side stand after the installation is completed, to the good template of bracket, steel
The tying point of muscle and stable inspection after-pouring concrete, until the concrete setting of middle plate forms after cooling time；
After the middle plate reaches design strength, all templates and bracket are dismantled for the dismounting of step 5, template and bracket.
Further, in the step 1, the perpendicular support weldering of the newly-increased temporary support symmetric design and newly-increased temporary support
It connects and is anchored in the stull of original temporary support.
Further, in the step 1, the upper bracket includes horizontally disposed more support rails and Duo Gen perpendicular
To bridging, the support rail is connected with the vertical bridging using total sub-semigroup, the top two of the upper bracket
Side is provided with scissors hound；The side stand includes more horizontally disposed vertical bridgings, the vertical bridging from it is lower to
Upper equidistant uniformly distributed, the vertical bridging includes jacking and the lumps of wood, and one end of jacking is connected to the newly-increased temporary support
In perpendicular support, the other end is connect by the lumps of wood with template.
Further, the support rail using the I-steel of 10cm as longitudinal distribution beam, two of arbitrary neighborhood
The spacing of the vertical bridging is less than or equal to 4.5m, the bridging brace and ground angle should 45 °~60 ° it
Between.
Further, it is pasted between two templates of arbitrary neighborhood in the step 2, before the template assembly anti-
The foam double-side glue of spillage.
Further, template aperture is provided in the template of the collateral rack position.
Further, template described in the step 3 wants matching coordinative to carry out with reinforcement installation, interferes assembling reinforcement
Segment template should to reinforcement installation after polishing is installed again.
Further, in the step 4, concreting is primary concreting completion, should the company of holding in casting process
It is continuous uninterrupted.
Further, in the step 5, the disassembly of the template first tears open according to rear branch, first props up and tear open afterwards, first tear non-hold open
Molality plate, after tear open bearing form sequence carry out.
Further, it when removing the template below the middle plate, first since span centre, is symmetrically dismantled to both ends respectively；
The dismounting of side stand and template is successively carried out according to top-down sequence；Finally remove support system, sequentially using by outside to
Mode interior, from top to bottom, the first step releases top stull and perpendicular support connects and removes stull；Second step release perpendicular support with it is described
Inverted arch anchor connection simultaneously removes perpendicular support.
Compared with prior art, advantageous effects of the invention:
A kind of middle board construction method carried out using original temporary support of the present invention, passes through the installation of bracket, the peace of template
Dress, the installation of reinforcing bar, the dismounting of the pouring construction of middle plate and template and bracket amount to five operating procedures, realize plate in tunnel
Construction operation, it specifically includes following advantages that the technical solution is rationally distributed, and safe operation performance is high:
1) original gib system is utilized, construction risk is reduced；Optimized construction procedure greatly reduces middle plate construction branch
Frame is transported again, is set up, put into a small amount of bracket can quickly carry out in plate construction, shorten the construction period.
2) reduce original gib system to remove, transport except process, greatly reduce the cross-operation in small space
It influences, is conducive to security management and control.
3) original gib system hardened structure in is combined, the stability of analysis bracket is calculated, weakness is added
Gu processing.
4) plate in section development can be jumped using original excavation construction channel to construct, it is same to carry out more work surfaces, multi-process rapidly
When construct.
5) it is permanent support system that plate rapid construction, which is conducive to gib system transform, in, is had safely to tunnel structure
Benefit.
6) it removed again after the completion of plate in, transport lower part temporary support, no cross-operation, safely controllable property height.
Detailed description of the invention
The invention will be further described for explanation with reference to the accompanying drawing.
Fig. 1 is the middle board construction method flow chart that the present invention is carried out using original temporary support；
Fig. 2 is that the present invention utilizes original temporary support structure schematic diagram；
Fig. 3 is original temporary support and middle plate structural schematic diagram in tunnel of the present invention；
Fig. 4 is location A enlarged drawing of the present invention；
Fig. 5 is the original limited software modeling schematic diagram of temporary support of the present invention；
Fig. 6-1 is the original temporary support stress envelope of the present invention；
Fig. 6-2 is the original temporary support bending moment diagram of the present invention；
Fig. 6-3 is the original temporary support shear diagram of the present invention；
Fig. 6-4 is the original temporary support axial force diagram of the present invention；
Description of symbols: 1, original temporary support；2, interim perpendicular support is increased newly；3, bracket；301, template；302, the lumps of wood；
303, jacking；304, template aperture；305, rack cross-bar；4, middle plate；5, side wall；6, inverted arch.
Specific embodiment
As shown in Figs 1-4, a kind of middle board construction method carried out using original temporary support, including following implementation steps:
Step 1, the installation of bracket, adjacent original temporary support 1 is as operation platform under plate in, firstly, abolishing
Concrete in original temporary support 1 simultaneously retains the steel coupling part between stull and perpendicular support, the cross in original temporary support 1
It supports and increases temporary support 2 newly in the connection of two side lower parts, then release the connection between the stull and two sides side wall 5, at this time former support
System transform is cantilever design, is computed and is unsatisfactory for structural stability requirement, is computed structural strength, rigidity, stability and meets
It is required that need to reinforce the perpendicular support in original temporary support 1 and newly-increased temporary support 2 and the connection between lower section inverted arch 6,
Original temporary support 1 and newly-increased temporary support 2 form the stable support system with four perpendicular supports；Wherein, according to existing
Rod piece data carry out modeling using finite element software and are illustrated in fig. 5 shown below, and sunykatuib analysis stress condition is as shown in fig. 6, and it is each
Computation of many nodes is all satisfiedIts each bar stability checking computations meetsBy increasing the quasi- calculating of perpendicular hold mode, the support of four perpendicular support compositions
The stress of system entirety meets design requirement.
Then, in the two sides of the support system and top setting support 3, the bracket 3 includes upper bracket and side stand,
The upper bracket is mounted on above the stull in original temporary support 1, and the lower bracket is mounted on the newly-increased interim branch
The outside of the perpendicular support of support 2.
It specifically increases temporary support 2 newly and uses the fashioned iron of HW400 × 400, newly-increased 2 symmetric design of temporary support and new
The perpendicular support welding for increasing temporary support 2 is anchored in the stull of original temporary support 1, and anchoring lower ends are on the cement top of inverted arch 6
On face.The upper bracket includes horizontally disposed more support rails 305 and the vertical bridging of Duo Gen, the vertical bridging packet
Upright bar, jacking and collet are included, jacking and collet are symmetrically mounted on the both ends of the upright bar and are connected to by the upright bar described
On support rail 305, the top of the support rail 305 of the most top surface is equipped with the thick bamboo slab rubber of one layer of 2cm；The upper bracket
Top two sides be provided with scissors hound, the bridging brace and ground angle are arranged between 45 °~60 °；The side
Bracket includes more horizontally disposed vertical bridgings, and the vertical bridging is equidistantly uniformly distributed from bottom to top, the vertical scissors
Support includes jacking 303 and the lumps of wood 302, and one end of jacking 303 is connected in the perpendicular support of the newly-increased temporary support 2, and the other end is logical
The lumps of wood 302 is crossed to connect with template 301.
For the support rail 305 using the I-steel of 10cm as longitudinal distribution beam, two of arbitrary neighborhood are described vertical
The spacing of bridging is less than or equal to 4.5m.General location upright bar in length and breadth away from 0.6m × 0.9m is all made of, spacing is greater than 60cm
Local location is encrypted.Sweep the floor bar away from third road support top surface 0.26m (upright bar is vertical bar, and bar of sweeping the floor is the cross of basecoat
Bar).
Step 2, the installation of template after the bracket 3 is installed, carry out template 301 after city's roads adjustment is qualified
Assembly, 301 assembly of template described in muti-piece is connected on the left and right side of the bracket 3, any before the template 301 is assembled
The foam double-side glue of mortar leakage prevention is pasted between two adjacent templates, due to middle plate primary concreting complete, bracket set up and
When template is installed, anticipated settlement is answered, to ensure template headroom and limit requirement；Shuttering supporting is secured, stablizes, it is ensured that coagulation
Do not occur to loosen in native casting process, run phenomena such as mould, overproof deformation sinking, when internal model is supported and installed, is always ensured that mould
Plate is indeformable.It is strictly executed by construction inspection rules, prevents fouling of clearance gauge.It is provided in the template of the collateral rack position
Template aperture 304.Specifically template includes two kinds of specifications, wherein the template close to middle plate lower part is 0.5m × 1m, thickness
5mm, is connected, with the perpendicular support reinforcement by connection of A48 steel pipe and newly-increased temporary support, spacing 300mm using the foundation bolt of M25 by 4 pieces
And 900mm；Rack template on middle plate construction bottom surface is thick bamboo slab rubber, with a thickness of 2cm；Using total sub-semigroup, A48 steel
Pipe, wall thickness 3.5mm.Template on side stand is 2m × 1m, and holder jacking is equipped with I-steel distribution beam, is laid with the lumps of wood on beam, side
Template is laid on wood.
Step 3, the installation of reinforcing bar start to install reinforcing bar on the template after the completion of the formwork erection on the upper bracket,
Standard concrete cushion block interval is used between the reinforcing bar and template；The template 301 wants matching coordinative to carry out with reinforcement installation,
Interfere assembling reinforcement segment template should to reinforcement installation after polishing is installed again.
Step 4, the pouring construction of middle plate, the template on reinforcing bar and side stand after the installation is completed, to the good template of bracket 3,
The tying point of reinforcing bar and stable inspection after-pouring concrete, until the concrete setting of middle plate 4 forms after cooling time；Concrete
It pours and is completed for primary concreting, should keep continuous uninterrupted in casting process.It should be noted that pour interval unsuitable too long when pouring,
In order to avoid forming cold seam, middle plate structure function is influenced.There should be special messenger to guard bed die and side form in casting process, find spillage or template
Overproof deformation should be handled in time.
The dismounting of step 5, template and bracket, after the middle plate 4 reaches design strength, by all templates 301 and bracket 3
Disassembly.The disassembly of the template 301 first tears open according to rear branch, first prop up tear open afterwards, first tear open non-bearing template, after tear the sequence of bearing form open
It carries out.When removing the template of 2 lower section of middle plate, first since span centre, symmetrically dismantled to both ends respectively；Side stand and template
Dismounting is successively carried out according to top-down sequence；Support system is finally removed, sequentially using side from outside to inside, from top to bottom
Formula, the first step releases top stull and perpendicular support connects and removes stull；Second step releases perpendicular support and 6 anchor connection of inverted arch simultaneously
Remove perpendicular support.It is usually since span centre when dismounting, symmetrically dismantling to both ends respectively is that the material conveniently removed transports.
Embodiment described above is only that preferred embodiment of the invention is described, and is not carried out to the scope of the present invention
It limits, without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention
Various changes and improvements, should all fall into claims of the present invention determine protection scope in.
Claims (10)
1. a kind of middle board construction method carried out using original temporary support, which is characterized in that including following implementation steps:
Step 1, the installation of bracket, adjacent original temporary support (1) is as operation platform under plate in, firstly, abolishing original
There is the concrete in temporary support (1) and retain the steel coupling part between stull and perpendicular support, on original temporary support (1)
Temporary support (2) are increased newly in the connection of two side lower part of stull, then release the connection between the stull and two sides side wall (5), simultaneously
Reinforce the connection between original temporary support (1) and the perpendicular support in newly-increased temporary support (2) and lower section inverted arch (6), it is described
Original temporary support (1) and newly-increased temporary support (2) form stable support system；
Then, in the two sides of the support system and top setting support (3), the bracket (3) includes upper bracket and side stand,
The upper bracket is mounted on above the stull on original temporary support (1), and the lower bracket is mounted on described newly-increased interim
Support the outside of the perpendicular support of (2)；
Step 2, the installation of template after the bracket (3) is installed, carry out template (301) after city's roads adjustment is qualified
Assembly, template (301) assembly described in muti-piece is connected on the left and right side of the bracket (3)；
Step 3, the installation of reinforcing bar start to install reinforcing bar on the template after the completion of the formwork erection on the upper bracket, described
Standard concrete cushion block interval is used between reinforcing bar and template；
Step 4, the pouring construction of middle plate, the template on reinforcing bar and side stand after the installation is completed, to the good template of bracket (3), reinforcing bar
Tying point and stablize check after-pouring concrete, until after cooling time middle plate (4) concrete setting molding；
The dismounting of step 5, template and bracket, after the middle plate (4) reaches design strength, by all templates (301) and bracket
(3) it dismantles.
2. the middle board construction method according to claim 1 carried out using original temporary support, it is characterised in that: the step
In rapid one, the perpendicular support welding of newly-increased temporary support (2) symmetric design and newly-increased temporary support (2) is anchored at described original face
When support (1) stull on.
3. the middle board construction method according to claim 1 carried out using original temporary support, it is characterised in that: the step
In rapid one, the upper bracket includes horizontally disposed more support rails (305) and more vertical bridgings, the support rail
(305) it is connected with the vertical bridging using total sub-semigroup, the top two sides of the upper bracket are provided with scissors diagonal brace
Bar；
The side stand includes more horizontally disposed vertical bridgings, and the vertical bridging is equidistantly uniformly distributed from bottom to top, institute
Stating vertical bridging includes jacking (303) and the lumps of wood (302), and one end of the jacking (303) is connected to the newly-increased interim branch
In the perpendicular support for supportting (2), the other end is connect by the lumps of wood (302) with template (301).
4. the middle board construction method according to claim 3 carried out using original temporary support, it is characterised in that: the branch
Cross bar (305) are supportted using the I-steel of 10cm as longitudinal distribution beam, the spacing of the vertical bridging of two of arbitrary neighborhood
Less than or equal to 4.5m, the bridging brace and ground angle should be between 45 °~60 °.
5. the middle board construction method according to claim 1 carried out using original temporary support, it is characterised in that: the step
In rapid two, the foam double-side glue of mortar leakage prevention is pasted with before the template (301) is assembled between two templates of arbitrary neighborhood.
6. the middle board construction method according to claim 1 carried out using original temporary support, it is characterised in that: be located at institute
It states and is provided with template aperture (304) in the template of collateral rack position.
7. the middle board construction method according to claim 1 carried out using original temporary support, it is characterised in that: the step
Template described in rapid three (301) wants matching coordinative to carry out with reinforcement installation, interferes the segment template of assembling reinforcement that should pacify to reinforcing bar
Polishing is installed again after dress.
8. the middle board construction method according to claim 1 carried out using original temporary support, it is characterised in that: the step
In rapid four, concreting is primary concreting completion, should keep continuous uninterrupted in casting process.
9. the middle board construction method according to claim 1 carried out using original temporary support, it is characterised in that: the step
In rapid five, the disassembly of the template (301) first tears open according to rear branch, first prop up tear open afterwards, first tear open non-bearing template, after tear bearing form open
Sequence carries out.
10. the middle board construction method according to claim 9 carried out using original temporary support, it is characterised in that: remove
When template below the middle plate (2), first since span centre, symmetrically dismantled to both ends respectively；The dismounting of side stand and template is pressed
It is successively carried out according to top-down sequence；Finally remove support system, sequentially using from outside to inside, from top to bottom by the way of,
One step releases top stull and perpendicular support connects and removes stull；Second step releases perpendicular support and the inverted arch (6) anchor connection and tears open
Except perpendicular support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811582394.0A CN109653770B (en) | 2018-12-24 | 2018-12-24 | Middle plate construction method by utilizing original temporary support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811582394.0A CN109653770B (en) | 2018-12-24 | 2018-12-24 | Middle plate construction method by utilizing original temporary support |
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| Publication Number | Publication Date |
|---|---|
| CN109653770A true CN109653770A (en) | 2019-04-19 |
| CN109653770B CN109653770B (en) | 2020-12-08 |
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ID=66115058
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811582394.0A Active CN109653770B (en) | 2018-12-24 | 2018-12-24 | Middle plate construction method by utilizing original temporary support |
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| Country | Link |
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| CN111156035A (en) * | 2020-03-10 | 2020-05-15 | 北京市政建设集团有限责任公司 | Template supporting method and template supporting structure for tunnel secondary lining |
| CN111810202A (en) * | 2020-07-20 | 2020-10-23 | 武汉市市政建设集团有限公司 | Underground connecting channel interface construction method |
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| CN111156035A (en) * | 2020-03-10 | 2020-05-15 | 北京市政建设集团有限责任公司 | Template supporting method and template supporting structure for tunnel secondary lining |
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| CN111810202B (en) * | 2020-07-20 | 2022-04-15 | 武汉市市政建设集团有限公司 | Underground connecting channel interface construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109653770B (en) | 2020-12-08 |
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