CN111411977A - Construction method for connecting diaphragm in single-hole double-layer tunnel by mould building - Google Patents
Construction method for connecting diaphragm in single-hole double-layer tunnel by mould building Download PDFInfo
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- CN111411977A CN111411977A CN202010222483.5A CN202010222483A CN111411977A CN 111411977 A CN111411977 A CN 111411977A CN 202010222483 A CN202010222483 A CN 202010222483A CN 111411977 A CN111411977 A CN 111411977A
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- concrete
- partition plate
- hole double
- steel
- steel bars
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 52
- 239000010959 steel Substances 0.000 claims abstract description 52
- 238000005192 partition Methods 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000007493 shaping process Methods 0.000 claims abstract description 7
- 238000012423 maintenance Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 5
- 238000005507 spraying Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 6
- 238000005498 polishing Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000004513 sizing Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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 OR ROCK 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of tunnel construction, in particular to a partition plate mold building connection construction method in a single-hole double-layer tunnel. After the concrete pouring of the tunnel bottom plate and the small side wall is finished, pouring the two-lining concrete by using the mould pouring trolley, then pouring the concrete as the middle partition plate by using the trolley mould after the concrete strength reaches 100%, adopting a method of reserving a steel bar connector in binding the two-lining steel bars, firstly using the template trolley to integrally pour the two-lining concrete in the tunnel, binding the steel bars of the middle partition plate after demoulding, and pouring the middle partition plate concrete by using two shaping steel mould trolleys as a template support system. The method obviously improves the construction efficiency, optimizes the construction process and reduces the labor intensity of constructors. The invention is mainly applied to the construction of the partition board in the single-hole double-layer tunnel.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a partition plate mold building connection construction method in a single-hole double-layer tunnel.
Background
The single-hole double-layer tunnel is an underground structure form with wide application prospect, has unique mechanical characteristics due to the large height-span ratio of the tunnel and the constraint of the middle partition plate, is superior to the single-hole large-span single-layer engineering cost, is environment-friendly and energy-saving, and has more advantages for a straight wall type side wall tunnel. Because the reinforcing bar of median septum and tunnel side wall reinforcing bar are design once for whole, the median septum links up the construction complicacy and the operation degree of difficulty is big, and the second lining concrete placement in tunnel and median septum concrete placement mould are not can once accomplish in the construction, therefore the second first construction in tunnel and median septum concrete placement mould construction are the difficult problem of the double-deck tunnel construction in single-hole.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the partition plate mould building connection construction method in the single-hole double-layer tunnel, which optimizes the construction process, reduces the labor intensity of constructors and improves the construction quality.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the construction method for the diaphragm building connection in the single-hole double-layer tunnel comprises the following steps:
s1, reserving a steel bar connector in the binding of the second lining steel bars, and arranging a support bracket below the steel bar connector when the second lining of the tunnel is poured;
s2, after the middle partition plate shaping steel mould trolley is in place, connecting the main reinforcements with a steel bar connector arranged above the bracket, and binding the middle partition plate steel bars;
s3, supporting a side die in the steel bar binding process, and reserving upper and lower rows of longitudinal steel bars;
s4, pouring the middle partition plate concrete by adopting a shaping steel mould trolley;
and S5, demolding after the concrete strength reaches the specification.
In step S1, the lengths of the embedded bars are set differently, so as to avoid the joints from being excessively concentrated at the same cross-sectional position.
In the step S3, before the steel bars are laid, the placement positions of the steel bars are measured in the up-down direction, and after the positions of the steel bars are determined, the upper row and the lower row of the steel bars are laid.
In step S4, the concrete is vibrated when the concrete is poured, the vibrating is performed by using an insertion-type vibrating rod, the inserting and the pulling are performed slowly until the concrete surface does not bubble any more, and a substantially flat surface is formed, and then the concrete surface is scraped roughly.
And maintaining the intermediate partition plate after the concrete is poured for 24 hours, wherein the maintaining time is not less than seven days.
And a method of covering felt and watering for maintenance is adopted in the maintenance process.
The trolley is arranged on the track, and sleepers are arranged below the track.
Compared with the prior art, the invention has the beneficial effects that:
the construction method has the advantages of optimizing fussy construction steps, reducing construction process time, improving construction quality, reducing labor intensity of constructors, along with simple operation, reasonable structure, strong bearing capacity and popularization value.
Drawings
FIG. 1 is a schematic view of the construction structure of the present invention;
FIG. 2 is a schematic view of a reinforcing bar connector;
FIG. 3 is a flow chart of the construction process of the present invention;
in the figure: the tunnel partition plate comprises a tunnel secondary lining 1, a tunnel partition plate top surface 2, a support bracket 3, a tunnel bottom plate 4, a steel bar connector 5, a main steel bar 6 and a tunnel partition plate bottom surface 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The construction method for the diaphragm building connection in the single-hole double-layer tunnel comprises the following steps:
s1, reserving a steel bar connector 5 in the binding of the second lining steel bars, arranging a support bracket 3 below the steel bar connector 5 when the second lining of the tunnel 1 is poured, wherein the anchoring length of the steel bar connector 5 is not less than 34d, the support bracket 3 is finished at one time when the second lining of the tunnel 1 is poured, and the length of a trolley of the second lining is 12 meters;
s2, after the middle partition plate sizing steel mould trolley is in place, connecting the main reinforcement 6 with a steel bar connector 5 arranged above the bracket 3, and binding the middle partition plate steel bars, wherein the middle partition plate sizing steel mould trolley is 12 m long;
s3, supporting a side die in the steel bar binding process, and reserving upper and lower rows of longitudinal steel bars;
s4, pouring the middle partition plate concrete by adopting a shaping steel mould trolley;
and S5, demolding after the concrete strength reaches the specification.
After the concrete pouring of the tunnel bottom plate and the small side wall is finished at the position of 150cm, pouring secondary lining concrete by adopting a mould pouring trolley, after the concrete strength reaches 100%, adopting trolley mould pouring to construct the middle partition plate concrete, adopting a method of reserving a steel bar connector 5 in binding secondary lining steel bars, firstly using a template trolley to integrally pour the concrete of the secondary lining 1 of the tunnel, after demoulding, binding the steel bars of the middle partition plate, and adopting two shaping steel mould trolleys as a template support system to pour the middle partition plate concrete.
Preferably, in step S1, the lengths of the planted bars are set differently, and the joint positions are staggered according to the different lengths of the planted bars, so as to avoid the joints from being excessively concentrated at the same cross-section position.
Preferably, in step S3, the design thickness of the middle partition board is 350mm, the placement positions of the steel bars are measured along the upper and lower directions before the steel bars are laid, and the top surface 2 of the middle partition board in the tunnel and the bottom surface 7 of the middle partition board in the tunnel are laid after the positions of the steel bars are determined. Before installing the top surface 2 of the partition board in the tunnel, a split stool bar is firstly arranged, made of 10mm steel bars, with the distance of 1m and arranged in a quincunx shape. In order to control the elevation of the concrete, the processing of the split heads is strictly controlled, and the height of the split heads is calculated according to the thickness of the concrete protective layer.
Preferably, in step S4, the concrete is vibrated when the concrete is poured, the concrete is vibrated by using an insert-type vibrating rod, the concrete is inserted and pulled slowly until the concrete surface is not foamed, and a substantially flat surface is formed, and then the concrete surface is scraped roughly. After each concrete plate is vibrated, a channel steel scraping bar is used for reciprocating 4-5 times to achieve that the upper surface is flat, primary pulp is fully distributed, and coarse aggregate is extruded to the middle lower part of the concrete. Manually collecting the pulp by using a trowel. And then, carrying out mechanical polishing, namely carrying out surface polishing on the concrete by adopting a blade type polishing machine after the concrete is initially set and before the concrete is finally set, and carrying out secondary polishing by using a polishing machine after the concrete is finally set.
Preferably, the intermediate partition plate concrete is cured after being poured for 24 hours, and the curing time is not less than seven days.
Preferably, the curing process adopts a method of watering and curing the blanket felt.
Preferably, the trolley is placed on a track of the tunnel floor 4, and sleepers are arranged below the track, wherein the sleepers are 160mm by 200mm by 2000mm in size and 500mm apart.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (7)
1. The construction method for connecting the partition boards in the single-hole double-layer tunnel by means of mold building is characterized by comprising the following steps of:
s1, reserving a steel bar connector in the binding of the second lining steel bars, and arranging a support bracket below the steel bar connector when the second lining of the tunnel is poured;
s2, after the middle partition plate shaping steel mould trolley is in place, connecting the main reinforcements with a steel bar connector arranged above the bracket, and binding the middle partition plate steel bars;
s3, supporting a side die in the steel bar binding process, and reserving upper and lower rows of longitudinal steel bars;
s4, pouring the middle partition plate concrete by adopting a shaping steel mould trolley;
and S5, demolding after the concrete strength reaches the specification.
2. The partition plate molding connection construction method in the single-hole double-layer tunnel according to claim 1, characterized in that: in step S1, the lengths of the embedded bars are set differently, so as to avoid the joints from being excessively concentrated at the same cross-sectional position.
3. The partition plate molding connection construction method in the single-hole double-layer tunnel according to claim 1, characterized in that: in the step S3, before the steel bars are laid, the placement positions of the steel bars are measured in the up-down direction, and after the positions of the steel bars are determined, the upper row and the lower row of the steel bars are laid.
4. The partition plate molding connection construction method in the single-hole double-layer tunnel according to claim 1, characterized in that: in step S4, the concrete is vibrated when the concrete is poured, the vibrating is performed by using an insertion-type vibrating rod, the inserting and the pulling are performed slowly until the concrete surface does not bubble any more, and a substantially flat surface is formed, and then the concrete surface is scraped roughly.
5. The partition plate molding connection construction method in the single-hole double-layer tunnel according to claim 4, characterized in that: and maintaining the intermediate partition plate after the concrete is poured for 24 hours, wherein the maintaining time is not less than seven days.
6. The method for constructing and connecting the partitions in the single-hole double-layer tunnel according to claim 5, wherein the maintenance process is carried out by spraying water on the covered felts.
7. The partition plate molding connection construction method in the single-hole double-layer tunnel according to claim 1, characterized in that: the trolley is arranged on the track, and sleepers are arranged below the track.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010222483.5A CN111411977A (en) | 2020-03-26 | 2020-03-26 | Construction method for connecting diaphragm in single-hole double-layer tunnel by mould building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010222483.5A CN111411977A (en) | 2020-03-26 | 2020-03-26 | Construction method for connecting diaphragm in single-hole double-layer tunnel by mould building |
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| Publication Number | Publication Date |
|---|---|
| CN111411977A true CN111411977A (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010222483.5A Pending CN111411977A (en) | 2020-03-26 | 2020-03-26 | Construction method for connecting diaphragm in single-hole double-layer tunnel by mould building |
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| CN (1) | CN111411977A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017057A (en) * | 2021-11-11 | 2022-02-08 | 中铁十二局集团有限公司 | Construction method of cast-in-place concrete air duct partition plate for plateau railway tunnel double-lane trackless transportation auxiliary gallery |
| CN114017058A (en) * | 2021-11-11 | 2022-02-08 | 中铁十二局集团有限公司 | Construction method of fabricated air duct partition plate for plateau railway tunnel double-lane trackless transportation auxiliary gallery |
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| CN101067374A (en) * | 2007-02-13 | 2007-11-07 | 铁道第二勘察设计院 | Single-hole double-layer overlapping tunnel structure and construction method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017057A (en) * | 2021-11-11 | 2022-02-08 | 中铁十二局集团有限公司 | Construction method of cast-in-place concrete air duct partition plate for plateau railway tunnel double-lane trackless transportation auxiliary gallery |
| CN114017058A (en) * | 2021-11-11 | 2022-02-08 | 中铁十二局集团有限公司 | Construction method of fabricated air duct partition plate for plateau railway tunnel double-lane trackless transportation auxiliary gallery |
| CN114017058B (en) * | 2021-11-11 | 2023-04-25 | 中铁十二局集团有限公司 | Construction method for assembled type wind channel separator of auxiliary tunnel for double-lane trackless transportation of plateau railway tunnel |
| CN114017057B (en) * | 2021-11-11 | 2023-05-02 | 中铁十二局集团有限公司 | Construction method for cast-in-situ concrete wind channel separator of plateau railway tunnel double-lane trackless transportation auxiliary tunnel |
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Application publication date: 20200714 |