CN113137247B - Method for improving concrete pouring efficiency and compactness of tunnel secondary lining arch wall - Google Patents
Method for improving concrete pouring efficiency and compactness of tunnel secondary lining arch wall Download PDFInfo
- Publication number
- CN113137247B CN113137247B CN202110339961.5A CN202110339961A CN113137247B CN 113137247 B CN113137247 B CN 113137247B CN 202110339961 A CN202110339961 A CN 202110339961A CN 113137247 B CN113137247 B CN 113137247B
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- pouring
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- concrete
- steel
- compactness
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000004567 concrete Substances 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 238000010276 construction Methods 0.000 claims abstract description 11
- 239000011376 self-consolidating concrete Substances 0.000 claims description 6
- 238000005056 compaction Methods 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 description 12
- 241000357293 Leptobrama muelleri Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
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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
- E21D11/102—Removable shuttering; Bearing or supporting devices 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a method for improving concrete pouring efficiency and compactness of a tunnel secondary lining arch wall, which is characterized in that a steel mould trolley is used as a template when the arch wall is constructed, the steel mould trolley is provided with a plurality of pouring openings and grouting holes with moulds, and small steel moulds are used for plugging end moulds; when pouring, the pump pipe is connected into the end pouring port, all pouring port flashboards are opened, high-performance micro-expansion self-compaction concrete is poured, the pouring port is not required to be switched in the pouring process, the concrete is pushed to the far end by utilizing the single pouring port to be poured, pouring compaction condition judgment is carried out by combining grouting holes with molds and overflow slurry conditions of the end molds, and pouring is carried out immediately after pouring, so that the pouring efficiency and the pouring compactness of the two lining arch walls are greatly improved, and the tunnel construction quality is effectively ensured.
Description
Technical Field
The invention relates to the technical field of tunnel secondary lining construction, in particular to a method for improving concrete pouring efficiency and compactness of a tunnel secondary lining arch wall.
Background
In the field of tunnel secondary lining construction, the problem that the quality of a vault is not compact and a cavity is common in arch wall construction more or less exists, the pouring efficiency is extremely low, and the following reasons are: firstly, dome air is not discharged, so that a cavity is formed, and concrete at the dome position is not full; secondly, the end mould plugging reliability is poor, and the larger pumping pressure cannot be born, so that the proper overflow is not possible; thirdly, shrinkage phenomenon exists in the concrete curing process, so that the vault is emptied; fourthly, dense vibration effect of the second lining steel bars is poor; fifthly, the pouring opening needs to be frequently replaced, the pump is frequently stopped, cold joints are easy to form, and the pouring time is prolonged. Therefore, how to improve the concrete pouring compactness and the pouring efficiency of the two-lining arch wall is a key for determining the success or failure of the two-lining construction.
Disclosure of Invention
In order to overcome the technical defects in the prior art, the invention provides the method for improving the concrete pouring efficiency and the compactness of the secondary lining arch wall of the tunnel, and pouring ports are not required to be frequently switched in the arch wall pouring process, so that the pouring efficiency and the secondary lining arch wall pouring compactness are greatly improved, the tunnel construction quality is effectively ensured, and the technical problems are solved.
The invention realizes the aim through the following technical scheme, namely a method for improving the concrete pouring efficiency and compactness of a secondary lining arch wall of a tunnel, wherein the arch wall pouring template used in the method is a steel mould trolley, the concrete adopts high-performance micro-expansion self-compacting concrete, and grouting with a mould is needed after the pouring is completed.
The steel mould trolley is provided with a plurality of pouring openings and a grouting hole with a mould, the grouting hole with the mould is arranged on two sides of the pouring opening, the pouring opening is provided with a movable flashboard, the steel mould trolley is provided with a small-block shaping steel mould for end mould plugging, the small-block shaping steel mould is connected with an end flange of the steel mould trolley through bolts, the bolt holes are long round holes, an angle steel back edge is arranged to strengthen the small-block shaping steel mould, the bearing capacity of the end mould is improved, the long round holes on the small-block shaping steel mould are radial long round holes, the long round holes on a flange of the steel mould trolley are annular long round holes, the high-performance micro-expansion self-compaction concrete mold-entering slump expansion degree is not less than 600mm, and the expansion rate is limited to be more than 0.015%.
The annular adjustment can ensure the tight installation between the small-block shaping steel dies, and the radial adjustment can ensure the close adhesion between the small-block shaping steel dies to the primary support surface.
The method for improving the concrete pouring efficiency and compactness of the second lining arch wall of the tunnel comprises the following construction steps:
s1: installing grouting pipes with molds in place, and opening all pouring gate plates;
s2: connecting a pump pipe to an end pouring port for pouring;
s3: when pouring is carried out until the side mold observation window, the pump is properly stopped, and the flat vibrator is started to vibrate;
s4: and when the other pouring ports overflow, closing the flashboard to continue pouring until all grouting pipes with the moulds and the highest ends of the end moulds overflow, and thus pouring can be completed.
According to the method for improving the concrete pouring efficiency and compactness of the tunnel secondary lining arch wall, only end pouring is utilized to perform single-port pouring in the whole pouring process, and the pouring port is not replaced.
The method for improving the concrete pouring efficiency and the compactness of the tunnel secondary lining arch wall is implemented immediately after pouring
In general, compared with the prior art, the above technical solution conceived by the present invention can achieve the following beneficial effects: according to the method for improving the concrete pouring efficiency and the compactness of the second lining arch wall of the tunnel, the pouring ports are not required to be frequently switched in the arch wall pouring process, the pouring efficiency and the pouring compactness of the second lining arch wall are greatly improved, and the tunnel construction quality is effectively ensured.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a layout of pouring ports and grouting holes with molds of a steel mould trolley according to the invention;
FIG. 2 is a schematic diagram of a small block shaping steel die used for end die plugging according to the invention;
in the figure: 1-pouring port, 2-grouting hole with mould, 3-observation window, 4-small block shaping steel mould, 5-angle steel and 6-oblong hole.
Detailed Description
The invention relates to a method for improving the concrete pouring efficiency and compactness of a tunnel secondary lining arch wall, wherein an arch wall pouring template used in the method is a steel mould trolley, the concrete adopts high-performance micro-expansion self-compacting concrete, and grouting with a mould is needed after pouring is completed.
The steel mould trolley is provided with a plurality of pouring ports 1 and grouting holes 2 with moulds, the arrangement of the pouring ports 1 and the grouting holes 2 with moulds on the steel mould trolley is shown in figure 1, the grouting holes 2 with moulds are arranged on two sides of the pouring ports 1, the pouring ports 1 are provided with movable flashboards, and the side end faces of the steel mould trolley are provided with small-block shaping steel moulds 4 for end mould plugging.
As shown in FIG. 2, the small-block shaping steel die 4 for end die plugging is connected with the end flange of the steel die trolley by bolts, bolt holes are long round holes 6, angle steel 5 back edges are arranged to strengthen the small-block shaping steel die 4, the long round holes 6 on the small-block shaping steel die 4 are radial long round holes, the long round holes 6 on the steel die trolley flange are annular long round holes, the slump expansion of the high-performance micro-expansion self-compacting concrete is not less than 600mm, and the limiting expansion rate is more than 0.015%.
The pouring method comprises the following construction steps:
step one: installing grouting pipes with moulds in place, and opening flashboards of all pouring ports 1;
step two: connecting a pump pipe to the end pouring opening 1 for pouring;
step three: when pouring is carried out until the side mold observation window, the pump is properly stopped, and the flat vibrator is started to vibrate;
step four: and when the other pouring ports 1 overflow, closing the flashboard to continue pouring until all grouting pipes with the moulds and the highest ends of the end moulds overflow, and thus pouring can be completed.
In the whole pouring process, only the end pouring port 1 is used for single-port pouring, the pouring port is not replaced, and grouting with a mould is immediately carried out after the concrete pouring is finished.
The method has simple working procedures, does not need to frequently switch pouring ports in the process of pouring the arch wall, greatly improves the pouring efficiency and the pouring compactness of the two lining arch walls, and effectively ensures the tunnel construction quality.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (3)
1. A method for improving the concrete pouring efficiency and compactness of a second lining arch wall of a tunnel is characterized in that an arch wall pouring template used in the method is a steel mould trolley, the concrete adopts high-performance micro-expansion self-compacting concrete, and grouting with a mould is carried out after pouring is completed;
the steel mould trolley is provided with a plurality of pouring ports (1) and grouting holes (2) with moulds, the grouting holes (2) with moulds are arranged on two sides of the pouring ports (1), the pouring ports (1) are provided with movable flashboards, the steel mould trolley is provided with small-sized steel moulds (4) for end mould plugging, the small-sized steel moulds (4) are connected with end flanges of the steel mould trolley by bolts, bolt holes are slotted holes (6), angle steel (5) back edges are arranged to strengthen the small-sized steel moulds (4), the slotted holes (6) on the small-sized steel moulds (4) are radial slotted holes, the slotted holes (6) on the flanges of the steel mould trolley are annular slotted holes, and the expansion degree of the high-performance micro-expansion self-compacting concrete in mould falling is not less than 600mm, and the expansion rate of the high-performance micro-expansion self-compacting concrete is limited to be more than 0.015;
the pouring method comprises the following construction steps:
s1: installing grouting pipes with moulds in place, and opening flashboards of all pouring ports (1);
s2: connecting a pump pipe to an end pouring opening (1) for pouring;
s3: when pouring the concrete into the side mold observation window, properly stopping the pump, and starting the flat vibrator to vibrate;
s4: and when the other pouring ports (1) overflow, closing the flashboard of the pouring ports to continue pouring until all grouting pipes with the moulds and the highest ends of the end moulds overflow, and thus pouring can be completed.
2. The method for improving the concrete pouring efficiency and compactness of the tunnel double-lining arch wall according to claim 1, wherein the whole pouring process only uses the end pouring port (1) to perform single-port pouring without replacing the pouring port.
3. The method for improving the concrete pouring efficiency and compactness of the double-lining arch wall of the tunnel according to claim 1, wherein the grouting with the mould is performed immediately after the pouring is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110339961.5A CN113137247B (en) | 2021-03-30 | 2021-03-30 | Method for improving concrete pouring efficiency and compactness of tunnel secondary lining arch wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110339961.5A CN113137247B (en) | 2021-03-30 | 2021-03-30 | Method for improving concrete pouring efficiency and compactness of tunnel secondary lining arch wall |
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| Publication Number | Publication Date |
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| CN113137247A CN113137247A (en) | 2021-07-20 |
| CN113137247B true CN113137247B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110339961.5A Active CN113137247B (en) | 2021-03-30 | 2021-03-30 | Method for improving concrete pouring efficiency and compactness of tunnel secondary lining arch wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113847063B (en) * | 2021-09-26 | 2024-01-26 | 兰州理工大学 | Tunnel secondary lining concrete construction simulation method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190286A (en) * | 2002-12-10 | 2004-07-08 | Gifu Kogyo Co Ltd | Concrete placing method and its apparatus for tunnel |
| JP2015094167A (en) * | 2013-11-13 | 2015-05-18 | 鹿島建設株式会社 | Concrete placing method |
| CN207634088U (en) * | 2017-11-01 | 2018-07-20 | 中铁隧道勘察设计研究院有限公司 | A kind of grouped controls for lining trolley and tamping equipment |
| CN109026065A (en) * | 2018-07-25 | 2018-12-18 | 中铁十六局集团有限公司 | A kind of Tunnel Second Lining zero-fault construction method |
| CN110410106A (en) * | 2019-07-30 | 2019-11-05 | 中铁十二局集团有限公司 | Tunnel vault band film grouting construction method |
| CN111335922A (en) * | 2020-03-25 | 2020-06-26 | 陕西公路交通科技开发咨询公司 | Lining trolley and tunnel secondary lining construction method using lining trolley |
| CN211258625U (en) * | 2019-08-30 | 2020-08-14 | 中铁五局集团第五工程有限责任公司 | Tunnel secondary lining platform truck end template |
-
2021
- 2021-03-30 CN CN202110339961.5A patent/CN113137247B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190286A (en) * | 2002-12-10 | 2004-07-08 | Gifu Kogyo Co Ltd | Concrete placing method and its apparatus for tunnel |
| JP2015094167A (en) * | 2013-11-13 | 2015-05-18 | 鹿島建設株式会社 | Concrete placing method |
| CN207634088U (en) * | 2017-11-01 | 2018-07-20 | 中铁隧道勘察设计研究院有限公司 | A kind of grouped controls for lining trolley and tamping equipment |
| CN109026065A (en) * | 2018-07-25 | 2018-12-18 | 中铁十六局集团有限公司 | A kind of Tunnel Second Lining zero-fault construction method |
| CN110410106A (en) * | 2019-07-30 | 2019-11-05 | 中铁十二局集团有限公司 | Tunnel vault band film grouting construction method |
| CN211258625U (en) * | 2019-08-30 | 2020-08-14 | 中铁五局集团第五工程有限责任公司 | Tunnel secondary lining platform truck end template |
| CN111335922A (en) * | 2020-03-25 | 2020-06-26 | 陕西公路交通科技开发咨询公司 | Lining trolley and tunnel secondary lining construction method using lining trolley |
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| Publication number | Publication date |
|---|---|
| CN113137247A (en) | 2021-07-20 |
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