CN112196591A - Drainage preventing plate for reducing frost heaving force of tunnel in cold region and construction method thereof - Google Patents
Drainage preventing plate for reducing frost heaving force of tunnel in cold region and construction method thereof Download PDFInfo
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- CN112196591A CN112196591A CN202011179147.3A CN202011179147A CN112196591A CN 112196591 A CN112196591 A CN 112196591A CN 202011179147 A CN202011179147 A CN 202011179147A CN 112196591 A CN112196591 A CN 112196591A
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- 238000010276 construction Methods 0.000 title claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 230000000694 effects Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/381—Setting apparatus or devices
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- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a drainage-preventing plate for reducing frost heaving force of a tunnel in a cold region and a construction method thereof, wherein a waterproof structure comprises a plurality of waterproof parts, the waterproof parts are provided with drainage parts at intervals, and bearing parts are arranged at intervals at positions among the drainage parts on the waterproof parts; the drainage part is of a mutually parallel groove-shaped structure, the bottom surface of the drainage part is parallel to the secondary lining, and the drainage part is annularly arranged along the tunnel; the waterproof part is of a layered structure, the bottom surface of the waterproof part is attached to the secondary lining, the upper side of the waterproof part is parallel to the bottom surface of the drainage part, and the cross section of the waterproof part is the same in shape; the force bearing parts are a plurality of solid columnar structures which are parallel to each other. The construction method comprises the steps of excavating tunnels, constructing primary supports on surrounding rocks, processing base planes and the like. Through the structure, the problem that the structure is easy to damage due to frost heaving in the tunnel lining in the prior art can be solved, and the tunnel lining structure is simple in structure, high in practicability and good in reliability.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a drainage plate for reducing frost heaving force of a tunnel in a cold region and a construction method thereof.
Background
Abundant resources such as water conservancy, forests, mineral products and the like are distributed in a wide cold region of China. In order to effectively develop and utilize resources, the transportation requirement of a cold region is more vigorous, and tunnel engineering becomes one of important means for passing mountains and mountains of a transportation line of the cold region. From the existing cold region tunnel data, the problem of freezing injury frequently occurs in the construction and operation processes of the cold region tunnel, which becomes one of the main problems of diseases of the cold region tunnel, seriously affects the use function and durability of the tunnel, easily causes safety problems and accidents.
At present, most of traffic tunnels in China adopt composite lining as a supporting structure, namely, a primary supporting mode, a waterproof plate mode and a secondary lining mode, and the waterproof plate of a tunnel in a cold region built by a new Austrian method is basically the same as the waterproof plate of a common tunnel. The water in the surrounding rock permeates the primary support and enters the waterproof board, flows into the drainage ditch of the tunnel through the waterproof board and is discharged out of the tunnel. Under the influence of various factors, water is retained in the waterproof board, and under the condition that the local air temperature is low, the water is frozen into ice, the volume is increased by about 1/9, frost heaving force is generated, and a primary support and a secondary lining are extruded, so that the primary support and the secondary lining bear high pressure, cracks, leakage, ice hanging and other diseases occur, the tunnel service level is obviously reduced, and the driving safety is threatened.
The root cause of frost heaving damage of the tunnel is frost heaving force generated by freezing water in surrounding rocks and a supporting structure into ice. The function of the waterproof board is improved by adopting reasonable materials, structures and construction modes, the influence of frost heaving force on primary support and secondary lining is reduced, and the method has great practical significance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the drainage plate for reducing the frost heaving force of the tunnel in the cold region and the construction method thereof, which can solve the problem that the structure is damaged due to frost heaving easily occurring in the lining of the tunnel in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the drainage preventing plate comprises a plurality of waterproof parts, wherein the waterproof parts are provided with drainage parts at intervals, and the positions, among the drainage parts, of the waterproof parts are provided with bearing parts at intervals;
the drainage part is of a mutually parallel groove-shaped structure, the bottom surface of the drainage part is parallel to the secondary lining, and the drainage part is annularly arranged along the tunnel;
the waterproof part is of a layered structure, the bottom surface of the waterproof part is attached to the secondary lining, the upper side of the waterproof part is parallel to the bottom surface of the drainage part, and the cross section of the waterproof part is the same in shape;
the bearing parts are of a plurality of solid columnar structures which are parallel to each other, the width of the bearing parts is the same as the interval of the waterproof parts, and the upper ends of the bearing parts are abutted to the primary support.
The invention also provides a construction method of the anti-drainage plate for reducing the frost heaving force of the tunnel in the cold region, which comprises the following steps:
s1, excavating a tunnel, constructing primary support on surrounding rocks and carrying out base surface treatment;
s2, moving the waterproof board paving and hanging trolley to a set position, and paving the waterproof and drainage boards;
s3, erecting and installing a secondary lining template on the inner side of the waterproof board, and then pouring a secondary lining;
and S4, after the pouring is finished, performing maintenance work to finish the installation of the combined waterproof structure.
The invention provides the drainage preventing plate for reducing the frost heaving force of the tunnel in the cold region and the construction method thereof, and the drainage preventing plate has the main beneficial effects that:
under the environment condition of low air temperature, water in the anti-drainage plate provided by the invention is frozen into ice, the volume of the anti-drainage plate expands by about 1/9 towards the periphery, and frost heaving force is generated to extrude the surrounding structure. Through the interval setting load portion, when ice inflation, extrusion load portion to the space extrusion between the load portion, and then make ice along tunnel ring direction great with vertical volume expansion, great to load portion extrusion. At the moment, the volume expansion along the radial direction of the tunnel is small, the extrusion effect on the primary support, the waterproof part and the secondary lining is small, and therefore the effect of reducing the frost heaving force of the tunnel in a cold region is effectively achieved.
After the local air temperature is warmed up, the ice in the drainage part is melted into water, flows into the drainage ditch at the bottom of the tunnel, is discharged out of the tunnel, and the frost heaving force disappears. The bearing part is not influenced by the frost heaving force any more, and the shape is restored. When the local air temperature is reduced again, the water in the drainage part is frozen again, and the bearing part and the gap are squeezed. So relapse, realize reducing the effect of cold district's tunnel frost heaving effect for a long time, effectively improved the life of tunnel lining structure.
Drawings
Fig. 1 is a schematic structural diagram of a water discharge preventing plate for reducing frost heaving force of a tunnel in a cold region.
Fig. 2 is a schematic view showing the relative positions of the hollow protrusions.
FIG. 3 is a flow chart of a construction method of a water discharge prevention plate for reducing frost heaving force of a tunnel in a cold region.
The method comprises the following steps of 1, primary support, 2, a waterproof and drainage plate, 3, a force bearing part, 4, a drainage part, 5, a waterproof part, 6 and secondary lining.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of a drainage plate for reducing frost heaving force of a tunnel in a cold region.
The invention discloses a drainage-preventing plate for reducing frost heaving force of a tunnel in a cold region, which comprises a plurality of waterproof parts 5, wherein the waterproof parts 5 are provided with drainage parts 4 at intervals, and as shown in figure 2, bearing parts 3 are arranged at intervals on the waterproof parts 5 at positions among the drainage parts 4.
The water discharging part 4 is a groove-shaped structure which is parallel to each other, the bottom surface of the water discharging part 4 is parallel to the secondary lining 6, and the water discharging part 4 is annularly arranged along the tunnel.
The waterproof part 5 is a layered structure, the bottom surface of the waterproof part 5 is attached to the secondary lining 6, the upper side of the waterproof part 5 is parallel to the bottom surface of the drainage part 4, and the cross section of the waterproof part 5 has the same shape.
The bearing parts 3 are of a plurality of solid columnar structures which are parallel to each other, the width of the bearing parts 3 is the same as the interval of the waterproof parts 5, and the upper ends of the bearing parts 3 are abutted to the primary supports 1.
Specifically, the longitudinal section of the drain portion 4 is rectangular. The waterproof section 5 located between the drain sections 4 is also rectangular in longitudinal section. Thereby ensuring the maximum drainage capacity of the drainage part 4 and avoiding silting. The cross section of the force bearing part 5 is rectangular so as to prevent water erosion on the premise of ensuring the bearing capacity, reduce the radial projection area of the force bearing part along the tunnel and further reduce the radial pressure of frost heaving of water borne by the force bearing part.
The rigidity of the force bearing part 5 in the circumferential direction and the longitudinal direction of the tunnel is smaller than the rigidity of the force bearing part in the radial direction of the tunnel, and the flexibility of the force bearing part 5 in the circumferential direction and the longitudinal direction of the tunnel is larger than the flexibility of the force bearing part in the radial direction of the tunnel. Preferably, the force bearing part 5 is of an elastic structure. The top end of the bearing portion 5 is brought into contact with the preliminary bracing 1, thereby reducing the vertical force-receiving area.
Preferably, a pretightening force is arranged between the bearing part 5 and the primary support 1, so that the rigidity of the bearing part 5 along the radial direction of the tunnel is increased, and the flexibility of the bearing part is reduced.
Preferably, the anti-drainage plates 2 are mutually overlapped in a welding or bonding mode, so that the construction is convenient.
As shown in fig. 3, the invention also provides a construction method of the above-mentioned drainage plate for reducing frost heaving force of a tunnel in a cold region, which comprises the following steps:
and S1, excavating the tunnel, constructing the primary support 1 on the surrounding rock and carrying out base surface treatment.
And S2, moving the waterproof board paving and hanging trolley to a set position, and paving the waterproof and drainage board 2.
And S3, erecting and installing a secondary lining template on the inner side of the waterproof and drainage plate 2, and then pouring the secondary lining 6.
Further, the laying method of the waterproof and drainage plate 2 is as follows:
and (3) enabling the bearing part 3 to face the primary support and the waterproof part 5 to face the secondary lining, and overlapping the bearing part and the waterproof part in the circumferential direction and the longitudinal direction of the tunnel in a welding or bonding mode until the whole primary support 1 is covered.
And S5, after the pouring is finished, performing maintenance work to finish the installation of the combined waterproof structure.
Through the extrusion to the space between elastic material and the 3 bearing parts when water freezes the inflation for the frost heaving of water mainly takes place in the hoop and the vertical in tunnel, reduces water along the radial frost heaving in tunnel by a wide margin, and then reduces the frost heaving force between 1 and the secondary lining 6 of preliminary bracing by a wide margin, prevents the destruction of secondary lining 6 under the frost heaving force effect, makes cold district tunnel structure can keep safe and reliable for a long time.
The above description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Claims (10)
1. A water-proof drainage plate for reducing the frost heaving force of a tunnel in a cold region is characterized by comprising a plurality of waterproof parts, wherein the waterproof parts are provided with drainage parts at intervals, and the waterproof parts are provided with bearing parts at intervals at positions among the drainage parts;
the drainage part is of a mutually parallel groove-shaped structure, the bottom surface of the drainage part is parallel to the secondary lining, and the drainage part is annularly arranged along the tunnel;
the waterproof part is of a layered structure, the bottom surface of the waterproof part is attached to the secondary lining, the upper side of the waterproof part is parallel to the bottom surface of the drainage part, and the cross section of the waterproof part is the same in shape;
the bearing parts are of a plurality of solid columnar structures which are parallel to each other, the width of the bearing parts is the same as the interval of the waterproof parts, and the upper ends of the bearing parts are abutted to the primary support.
2. The drain-preventing plate for reducing frost heaving force of a tunnel in a cold region according to claim 1, wherein the longitudinal section of the drain portion is rectangular.
3. The drain prevention plate for reducing frost heaving force of a tunnel in a cold region according to claim 2, wherein a longitudinal section of the structure of the waterproof portion between the drain portions is also rectangular.
4. The drain-proof board for reducing the frost heaving force of the tunnel in the cold region as claimed in claim 3, wherein the cross section of the force bearing portion is rectangular.
5. The drain-proof board for reducing the frost heaving force of the tunnel in the cold region as claimed in claim 4, wherein the force bearing portion has a lower rigidity in the circumferential direction and the longitudinal direction of the tunnel than in the radial direction of the tunnel.
6. The drain-proof board for reducing the frost heaving force of the tunnel in the cold region as claimed in claim 5, wherein the force bearing part has a greater flexibility in the circumferential direction and the longitudinal direction of the tunnel than in the radial direction of the tunnel.
7. The drain prevention plate for reducing the frost heaving force of the tunnel in the cold region according to claim 6, wherein the drain prevention plate is in a structure that the drain prevention plate and the drain prevention plate are mutually overlapped in a welding or bonding mode.
8. A construction method of the anti-drain board for reducing the frost heaving force of the tunnel in the cold region according to any one of claims 1 to 7, comprising the steps of:
s1, excavating a tunnel, constructing primary support on surrounding rocks and carrying out base surface treatment;
s2, moving the waterproof board paving and hanging trolley to a set position, and paving the waterproof and drainage boards;
s3, erecting and installing a secondary lining template on the inner side of the waterproof board, and then pouring a secondary lining;
and S4, after the pouring is finished, performing maintenance work to finish the installation of the combined waterproof structure.
9. The construction method of the waterproof board for reducing the frost heaving force of the tunnel in the cold region according to claim 8, wherein the waterproof board is laid by:
and (3) enabling the bearing part to face the primary support and the waterproof part to face the secondary lining, and overlapping the bearing part and the waterproof part in the circumferential direction and the longitudinal direction of the tunnel in a welding or bonding mode until the whole primary support is covered.
10. The waterproof and drainage plate for reducing the frost heaving force of the tunnel in the cold region and the construction method thereof according to claim 1, wherein the method for pouring the secondary lining comprises the steps of pouring an inverted arch and a wall arch from bottom to top until the pouring is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011179147.3A CN112196591A (en) | 2020-10-29 | 2020-10-29 | Drainage preventing plate for reducing frost heaving force of tunnel in cold region and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011179147.3A CN112196591A (en) | 2020-10-29 | 2020-10-29 | Drainage preventing plate for reducing frost heaving force of tunnel in cold region and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112196591A true CN112196591A (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011179147.3A Pending CN112196591A (en) | 2020-10-29 | 2020-10-29 | Drainage preventing plate for reducing frost heaving force of tunnel in cold region and construction method thereof |
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| CN (1) | CN112196591A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922633A (en) * | 2021-01-29 | 2021-06-08 | 宁波朗达工程科技有限公司 | Expansion rock tunnel expansion deformation compensation cushion layer structure |
| CN114704326A (en) * | 2022-05-06 | 2022-07-05 | 哈尔滨工业大学 | High and cold district tunnel drain bar with phase transition is from energy storage and temperature adjustment is frostproofing |
-
2020
- 2020-10-29 CN CN202011179147.3A patent/CN112196591A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922633A (en) * | 2021-01-29 | 2021-06-08 | 宁波朗达工程科技有限公司 | Expansion rock tunnel expansion deformation compensation cushion layer structure |
| CN114704326A (en) * | 2022-05-06 | 2022-07-05 | 哈尔滨工业大学 | High and cold district tunnel drain bar with phase transition is from energy storage and temperature adjustment is frostproofing |
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