CN110486037B - Construction structure and method for preventing double-lining vault from being hollow for railway tunnel vault - Google Patents
Construction structure and method for preventing double-lining vault from being hollow for railway tunnel vault Download PDFInfo
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- CN110486037B CN110486037B CN201910787539.9A CN201910787539A CN110486037B CN 110486037 B CN110486037 B CN 110486037B CN 201910787539 A CN201910787539 A CN 201910787539A CN 110486037 B CN110486037 B CN 110486037B
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- drainage plate
- lining
- plastic drainage
- vault
- tunnel
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- 238000010276 construction Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000004746 geotextile Substances 0.000 claims description 10
- 238000004080 punching Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000011800 void material Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000004568 cement Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
-
- 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/383—Waterproofing; Heat insulating; Soundproofing; Electric insulating by applying waterproof flexible sheets; Means for fixing the sheets to the tunnel or cavity wall
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a construction structure and a construction method for preventing a double-lining vault from being hollow, the structure comprises plastic drainage plates, wherein the plastic drainage plates are respectively arranged along the center line of a tunnel and the left and right center lines of a line, the plastic drainage plates are respectively arranged between the center line of the tunnel and the left and right center lines of the line in an encrypted manner, and the plastic drainage plates are paved on the inner sides of the waterproof plates. So as to solve the problem of vault void frequently encountered in the construction process of secondary lining concrete. Belonging to the field of tunnel engineering construction.
Description
Technical Field
The invention relates to a construction structure and a method for preventing a double-lining vault from being emptied of a railway tunnel vault, and belongs to the field of tunnel engineering construction.
Background
Along with the high-speed development of railways in China, the construction quality of railway construction is highly concerned by China and society, engineers also put forward a plurality of solutions in the construction process, but no method can thoroughly and effectively solve the phenomenon. How to improve the construction quality during the construction process is the responsibility of each railway constructor. Tunnel engineering is heavy in many railway constructions, especially in the southern mountainous areas of China; the secondary lining concrete construction is a key link of tunnel engineering, and the phenomenon of vault void is frequently encountered in the secondary lining concrete construction process, and the reasons are various, such as insufficient number of top punching holes, poor concrete fluidity, artificial casting factors and the like. After these factors are eliminated, the root cause is that the air bag and the concrete bleeding water bag are sealed in the top surface of the vault concrete in the process of roof punching, the pressure in the sealed air (water) bag is always equal to the external pumping pressure of concrete, and concrete is not extruded into the vault to generate 'saturation' false marks, so that the compressed air (water) bag with the size still exists at the vault part vault dome part at the end of roof punching, which is commonly called vault part emptying. After that, the internal pressure of the air (water) bag is slowly released by the capillary channel of the concrete after being hardened, and the vault has a certain degree of feasibility of filling and grouting, but the 'saturation' artifact appears again along with the rapid rise of the internal pressure of the closed space, which is the root cause of the poor filling and grouting effect of the traditional vault.
Disclosure of Invention
The invention provides a construction structure and a method for preventing a secondary lining vault from being emptied in a railway tunnel vault, which are used for solving the problem of vault emptying frequently encountered in the secondary lining concrete construction process.
To achieve adequate filling of the dome-topped concrete, only a good construction of the moisture discharge channel of the dome-enclosed space is provided, the internal pressure of the enclosed space is kept smaller than the external pumping pressure all the time, and the concrete can be pumped into the dome-shaped space of the dome until the dome-shaped space is filled. The construction method for preventing the double-lining vault from being emptied by adopting the railway tunnel vault is characterized in that a plastic drainage plate (plastic insertion plate) widely applied to drainage consolidation of soft soil roadbed is adopted, a continuous water vapor discharge channel is constructed by arranging the plastic drainage plate on the vault, so that the one-time filling of the vault is realized, the hidden danger of vault emptying is eliminated, and the construction method for preventing the double-lining vault from being emptied is specifically adopted, and comprises the following steps:
1) Hanging geotextile, namely hanging geotextile after finishing the surface treatment of the primary support concrete;
2) The waterproof board is hung;
3) Positioning the positions of the plastic drainage plates by using a measuring instrument, arranging a plastic drainage plate at the positions of a central line of a tunnel and left and right central lines of a line, arranging the plastic drainage plate between the central line of the tunnel and the left and right central lines of the line in an encrypted manner, and using the measuring instrument to test and mark the positions on the waterproof plates;
4) Installing a drainage plate, namely installing a plastic drainage plate according to the marking position of the test, wherein the plastic drainage plate exceeds 30-50 cm at one end of the end mould of the secondary lining trolley, and installing a circular drainage plate in the 142-degree range of the poured secondary lining end and the central position of the trolley;
5) Installing secondary lining steel bars, wherein the sections of the secondary lining with the steel bars are provided with the secondary lining, and installing the secondary lining steel bars according to the design;
6) Closing the mould of the second lining trolley, and after the second lining steel bar is qualified, positioning, rechecking and adjusting the second lining trolley to block the end mould of the second lining trolley;
7) Pouring secondary lining concrete and punching, jacking and pressing;
8) Grouting with a mould.
The invention also provides a construction structure for preventing the double-lining vault from being hollow, which comprises plastic drainage plates, wherein the plastic drainage plates are respectively arranged along the center line of the tunnel and the left and right center lines of the line, the plastic drainage plates are respectively arranged between the center line of the tunnel and the left and right center lines of the line in an encrypted manner, and the plastic drainage plates are paved on the inner sides of the waterproof plates.
In the construction structure for preventing the secondary lining vault from being hollow, one end of the secondary lining trolley end mould of the plastic drainage plate exceeds 30 to 50cm during construction;
the construction structure for preventing the secondary lining vault from being hollow further comprises a circumferential drainage plate, wherein the circumferential drainage plate is respectively arranged in the range of 142 degrees between the poured secondary lining end and the center position of the trolley in the construction stage of the secondary lining vault of the tunnel, and the circumferential drainage plate is also paved on the inner side of the waterproof plate;
in the construction structure for preventing the double-lining vault from being hollow, the plastic drainage plate and the annular drainage plate are SPB-C plastic drainage plates wrapped with geotextiles.
Compared with the prior art, the invention has the following beneficial effects:
1. the plastic drainage plates are continuously paved along the vault waterproof plate longitudinally, the circumferential spacing can be flexibly adjusted as required, the plastic drainage plates are closely attached to the waterproof plate, and vaults can be randomly distributed, and small dome-shaped closed spaces which are independent of each other can be communicated in series and discharged.
2. The plastic drain board has the advantages of numerous manufacturers, convenient purchase, stable quality and low price.
3. The plastic drain board is convenient and quick to install, workers can be on duty through simple training, and complex skills and equipment are not needed.
4. The roof punching fullness can be intuitively judged by observing the drainage change condition of the exposed end of the plastic drainage plate through the side station, the reliability of the roof punching fullness is greatly increased, and the misjudgment risk is small.
5. The slump of the top-pouring concrete is properly increased, if the pump pressure is kept for a period of time at the end stage of top pouring, the full top pouring is finally realized, the process of grouting with a mould is omitted, and the effects of time saving, labor saving and money saving can be achieved.
6. The plastic drain board is thin and narrow in thickness and width, the two-lining section and the stress structure are not weakened and influenced, and most of the inner space of the core material is filled with cement paste after the top punching is finished, so that a vault harmful space is not left, and the vault harmful space is not identified by a geological radar.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a construction flow chart of the present invention.
Detailed Description
For the purpose of promoting an understanding of the principles of the invention, reference will now be made in detail to the embodiments described herein, including examples, illustrated in the accompanying drawings.
Examples
Referring to fig. 1, this embodiment provides a construction structure for preventing a secondary lining vault from being emptied for a railway tunnel vault, the structure includes a plastic drainage plate 1, a plastic drainage plate 1 is respectively arranged along a central line of the tunnel and left and right central lines of a line, a plastic drainage plate 1 is respectively arranged between the central line of the tunnel and the left and right central lines of the line, the plastic drainage plate 1 is laid on the inner side of the waterproof plate, the plastic drainage plate 1 exceeds 30 to 50cm at one end of a secondary lining trolley head mould, a circular drainage plate 2 is respectively arranged in a 142 DEG range of the center positions of the poured secondary lining ends and the trolley in the construction stage of the secondary lining arch part of the tunnel, the circular drainage plate 2 is also laid on the inner side of the waterproof plate, wherein reference numeral 3 represents a secondary lining concrete pouring position, and the plastic drainage plate 1 and the circular drainage plate 2 are SPB-C plastic drainage plates wrapped with geotextiles.
Referring to fig. 2, the concrete construction is as follows:
1. geotextile hanging device
And (3) hanging geotextile after finishing the surface treatment of the primary support concrete, wherein the overlap joint length of the geotextile is 5cm, the spacing arch part of hanging points is 0.5m, the part below the side wall is 0.8m, and each plate exceeds 1.6m of a construction joint, so that the next cycle overlap joint is convenient.
2. Waterproof board hanging device
The overlap joint length of the waterproof board is 15cm, the waterproof board is welded by a climbing welder, the spacing arch part of hanging points is 0.5m, the part below the side wall is 0.8m, and each board exceeds 1.5m of a construction joint, so that the next cycle overlap joint is convenient.
3. Positioning plastic drain board position using measuring instrument
The plastic drainage plates 1 are arranged at the positions of the central line of the tunnel and the left and right central lines of the line, the plastic drainage plates 1 are arranged between the central line of the tunnel and the left and right central lines of the line in an encrypted manner, and the positions are tested and marked on the waterproof plates by using a measuring instrument.
4. Installation drain board
And installing a plastic drainage plate 1 according to the marking position of the test, wherein the plastic drainage plate 1 exceeds 30-50 cm at one end of the end mould of the secondary lining trolley, and installing a circular drainage plate 2 at the poured secondary lining end and the trolley within 142 DEG respectively.
5. Mounting two lining steel bars
And installing the second lining steel bars according to the design of the section with the steel bars of the second lining.
6. Closing die for two-lining trolley
And after the second lining steel bar is qualified, the second lining trolley is positioned, rechecked and adjusted to block the end head die of the second lining trolley.
7. Casting secondary lining concrete and punching top holding pressure
After the secondary lining trolley is qualified in the test, the secondary lining trolley is subjected to warehouse separation, layering, window-by-window pouring and window-by-window vibrating, and pouring speed is reduced after the secondary lining concrete is poured to the vault, because a certain time is required for air exhaust and water drainage of the plastic water drainage plate, when the secondary lining vault concrete is found to be full, the secondary lining vault concrete is suspended for about 10 minutes, then the concrete is pumped once again, the concrete is suspended for about 10 minutes, and the concrete is pumped again and circulated for 3 to 5 times.
Standard for concrete topping plump: the pumping pressure is continued for 10 minutes, and the dripping interval time of the end head of the plastic drainage plate is more than or equal to 2 seconds as a judgment standard. The plastic drain board 1 drains water when it is topped (and also vents).
8. Grouting with mould
The grouting with the mould is carried out according to the process requirement, and the grouting with the mould can be completed within 1 hour after the top of the secondary lining concrete is stamped, because the cement paste which is soaked in the geotechnical material wrapped outside the plastic drainage plate 1 is not solidified at this time, the air and the water can be continuously exhausted, the grouting effect of filtering water is achieved, and the cement paste is finally solidified and is disabled.
End standard of in-mold grouting: the plastic drainage plate 1 is used as a standard for completely discharging air and water when thick slurry is discharged.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The construction method for preventing the double-lining vault from being emptied of the railway tunnel vault is characterized by comprising the following steps of:
1) Hanging geotextile, namely hanging geotextile after finishing the surface treatment of the primary support concrete;
2) The waterproof board is hung;
3) Positioning the positions of the plastic drainage plates by using a measuring instrument, arranging a plastic drainage plate at the positions of a central line of a tunnel and left and right central lines of a line, arranging the plastic drainage plate between the central line of the tunnel and the left and right central lines of the line in an encrypted manner, and using the measuring instrument to test and mark the positions on the waterproof plates;
4) Installing a drainage plate, namely installing a plastic drainage plate according to the marking position of the test, wherein the plastic drainage plate exceeds 30-50 cm at one end of the end mould of the secondary lining trolley, and installing a circular drainage plate in the 142-degree range of the poured secondary lining end and the central position of the trolley;
5) Installing secondary lining steel bars, wherein the sections of the secondary lining with the steel bars are provided with the secondary lining, and installing the secondary lining steel bars according to the design;
6) Closing the mould of the second lining trolley, and after the second lining steel bar is qualified, positioning, rechecking and adjusting the second lining trolley to block the end mould of the second lining trolley;
7) Pouring secondary lining concrete and punching, jacking and pressing;
8) Grouting with a mould.
2. The construction method according to claim 1, wherein: the construction method adopts a construction structure for preventing the double-lining vault from being hollow, the structure comprises a plastic drainage plate (1), the plastic drainage plate (1) is respectively arranged at the left and right central line positions along the central line of the tunnel and the line, the plastic drainage plate (1) is respectively arranged between the central line of the tunnel and the left and right central lines of the line in an encrypted manner, and the plastic drainage plate (1) is paved at the inner side of the waterproof plate.
3. The construction method according to claim 2, wherein: one end of the end mould of the two-lining trolley in the construction process of the plastic drainage plate (1) exceeds 30 to 50cm.
4. The construction method according to claim 2, wherein: the construction method is characterized by further comprising a circumferential drainage plate (2), wherein the circumferential drainage plate (2) is respectively arranged in the range of 142 degrees between the poured lining ends and the center position of the trolley in the construction stage of the second lining arch part of the tunnel, and the circumferential drainage plate (2) is also paved on the inner side of the waterproof plate.
5. The construction method according to claim 2, wherein: the plastic drainage plate (1) and the annular drainage plate (2) are SPB-C plastic drainage plates wrapped with geotextiles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787539.9A CN110486037B (en) | 2019-08-26 | 2019-08-26 | Construction structure and method for preventing double-lining vault from being hollow for railway tunnel vault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787539.9A CN110486037B (en) | 2019-08-26 | 2019-08-26 | Construction structure and method for preventing double-lining vault from being hollow for railway tunnel vault |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110486037A CN110486037A (en) | 2019-11-22 |
| CN110486037B true CN110486037B (en) | 2024-04-05 |
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| CN201910787539.9A Active CN110486037B (en) | 2019-08-26 | 2019-08-26 | Construction structure and method for preventing double-lining vault from being hollow for railway tunnel vault |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202810936U (en) * | 2012-05-09 | 2013-03-20 | 岳喜军 | Water draining plate for arched building |
| CN104632277A (en) * | 2015-02-09 | 2015-05-20 | 四川皓德斯新材料科技有限公司 | Bonded flexible water proof and drainage coiled material for road and railway tunnel and laying method thereof |
| CN108252726A (en) * | 2018-03-09 | 2018-07-06 | 中交第二航务工程局有限公司 | The device and its construction method that prevention Tunnel Second Lining vault comes to nothing |
| CN108361065A (en) * | 2018-05-07 | 2018-08-03 | 中铁工程设计咨询集团有限公司 | A kind of tunnel inverted arch filling discharge structure |
| CN108661671A (en) * | 2018-05-16 | 2018-10-16 | 中铁十七局集团第三工程有限公司 | Tunnel vault two serves as a contrast concrete vacuum and assists pouring procedure |
| CN109441491A (en) * | 2018-10-29 | 2019-03-08 | 中铁二局第工程有限公司 | A kind of railway tunnel self-adhesive waterproof material and its construction method |
| CN109611150A (en) * | 2019-02-20 | 2019-04-12 | 中铁隧道局集团有限公司 | Tunnel water proofing discharge structure and tunnel water proofing water discharge method |
| CN211008658U (en) * | 2019-08-26 | 2020-07-14 | 中铁二局第一工程有限公司 | Construction structure for preventing two lining vault from being hollow at railway tunnel vault |
-
2019
- 2019-08-26 CN CN201910787539.9A patent/CN110486037B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202810936U (en) * | 2012-05-09 | 2013-03-20 | 岳喜军 | Water draining plate for arched building |
| CN104632277A (en) * | 2015-02-09 | 2015-05-20 | 四川皓德斯新材料科技有限公司 | Bonded flexible water proof and drainage coiled material for road and railway tunnel and laying method thereof |
| CN108252726A (en) * | 2018-03-09 | 2018-07-06 | 中交第二航务工程局有限公司 | The device and its construction method that prevention Tunnel Second Lining vault comes to nothing |
| CN108361065A (en) * | 2018-05-07 | 2018-08-03 | 中铁工程设计咨询集团有限公司 | A kind of tunnel inverted arch filling discharge structure |
| CN108661671A (en) * | 2018-05-16 | 2018-10-16 | 中铁十七局集团第三工程有限公司 | Tunnel vault two serves as a contrast concrete vacuum and assists pouring procedure |
| CN109441491A (en) * | 2018-10-29 | 2019-03-08 | 中铁二局第工程有限公司 | A kind of railway tunnel self-adhesive waterproof material and its construction method |
| CN109611150A (en) * | 2019-02-20 | 2019-04-12 | 中铁隧道局集团有限公司 | Tunnel water proofing discharge structure and tunnel water proofing water discharge method |
| CN211008658U (en) * | 2019-08-26 | 2020-07-14 | 中铁二局第一工程有限公司 | Construction structure for preventing two lining vault from being hollow at railway tunnel vault |
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| CN110486037A (en) | 2019-11-22 |
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