CN207775949U - A kind of high external water pressure relief features of underground chamber bottom plate - Google Patents
A kind of high external water pressure relief features of underground chamber bottom plate Download PDFInfo
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- CN207775949U CN207775949U CN201721873995.8U CN201721873995U CN207775949U CN 207775949 U CN207775949 U CN 207775949U CN 201721873995 U CN201721873995 U CN 201721873995U CN 207775949 U CN207775949 U CN 207775949U
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- pressure relief
- bottom plate
- gas pressure
- underground chamber
- external water
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Abstract
The utility model provides a kind of high external water pressure relief features of underground chamber bottom plate, gas pressure relief slot is arranged in the middle part of underground chamber bottom plate, gas pressure relief slot arranges that the gas pressure relief slot is backfilled with infiltrative packing material, and cover board is arranged in the upper surface of described gas pressure relief slot along underground chamber axis.The utility model can effectively reduce external water pressure in the case where not influencing engineering normal use, and bottom plate is protected not generate large deformation, reduce maintenance cost.Meanwhile the utility model is simple in structure, implementation threshold is low, and scene is convenient to carry out, and the later stage is convenient for maintenance.
Description
Technical field
The utility model is related to a kind of high external water pressure relief features of underground chamber bottom plate, can apply to high external water pressure ring
Underground excavation engineering under border, such as workshop, tunnel in hydroelectric project, water delivery gas pipeline, traffic tunnel etc. are described high outer
The value of hydraulic pressure is higher than 1MPa.
Background technology
Underground chamber can bear the effect of external water pressure, especially buriedly since buried depth is less than phreatic line
Lower cavern, it will suffer from the effect of high external water pressure, water ballast(ing) is one of the main load that underground chamber is born, in cavern
It must pay attention in design process.
Currently, the main methods for high external water pressure include：（1）In shallow embedding engineering, generally use " with row be
The scheme of master ", underground water can not consider when acting on design.The measure can be played bright in terms of reducing external water pressure effect
Aobvious effect, but it is also very prominent the shortcomings that drainage measure, and engineering practice shows the engineering using drainage measure, Duo Shuocun
In different degrees of water damage, and develop year by year, influences engineering safety, or even generation surface subsidence, destruction aquatic environment etc. and ask
Topic；（2）In buried engineering, in order to protect Around groundwater resources and environment requirement, should not use " with row be
It is main " scheme, should use the scheme " based on stifled, the row's of blocking up combination ", but due to underground cavern excavation after, underground water is by static pressure
Switch to flow, grouting is caused to be difficult to reach ideal effect.
Underground water also affects the safety of engineering operation phase other than influencing the normal construction of engineering.Due to Underground Tunnels
The excavation of room causes construction time level of ground water to decline, but with the end of engineering construction phase, level of ground water will be with envelope
Development and the putting into operation for engineering of stifled work and constantly increase, especially enter flood season, the external water pressure to increase sharply every year
Strong influence is caused to the safety of engineering.
The stability of underground chamber is greatly affected under high external water pressure environment, the external water pressure of both sides abutment wall and crown
It can be by arranging that osculum be resolved, but cavern's bottom plate is due to the limitation of cavern's build, it is generally flat, lead to the outer water of height
Pressure generates concentration in bottom plate, and the external water pressure born is far above both sides abutment wall and crown, and the osculum arranged is in engineering
It is easily blocked in operational process, external water pressure can not cut down, and bottom plate is caused to destroy.The destruction of bottom plate can not only influence
The normal use of engineering also brings along a large amount of maintenance cost.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of high external water pressure relief features of underground chamber bottom plate,
Can effective external water pressure of the consumption on bottom plate, and do not influence the normal operation of cavern, compare in later maintenance yet
It is convenient.For this purpose, the utility model uses following technical scheme：
A kind of high external water pressure relief features of underground chamber bottom plate, which is characterized in that arranged in the middle part of underground chamber bottom plate
Gas pressure relief slot, gas pressure relief slot arrange that the gas pressure relief slot is backfilled with infiltrative packing material, the pressure release along underground chamber axis
Cover board is arranged in the upper surface of slot.
Further, it when the width of underground chamber bottom plate is less than or equal to 8m, arranges 1 gas pressure relief slot, 2 is arranged when more than 8m
A gas pressure relief slot；When 1 gas pressure relief slot is arranged, the gas pressure relief slot is arranged in bottom plate midpoint, when 2 gas pressure relief slots are arranged, is arranged in
On baseplate width 1/3 and 2/3 at.
Further, pressure release well width is 10 ~ 15cm.
Further, the depth of gas pressure relief slot is the 2/5 ~ 3/5 of underground chamber floor length.
Further, the cover board is removably mountable to the notch of gas pressure relief slot.
The high external water pressure relief features of underground chamber bottom plate provided by the utility model, can make not influencing engineering normally
In the case of, external water pressure is effectively reduced, bottom plate is protected not generate large deformation, reduces maintenance cost.Meanwhile the utility model
Simple in structure, implementation threshold is low, and scene is convenient to carry out, and the later stage is convenient for maintenance.
Description of the drawings
Fig. 1 is that 1 gas pressure relief slot is being arranged in the high external water pressure relief features of underground chamber bottom plate provided by the utility model
When sectional schematic diagram.
Fig. 2 is that 2 gas pressure relief slots are being arranged in the high external water pressure relief features of underground chamber bottom plate provided by the utility model
When sectional schematic diagram.
Specific implementation mode
With reference to attached drawing.The high external water pressure relief features of underground chamber bottom plate provided by the utility model, in underground chamber
100 middle part of bottom plate arranges that gas pressure relief slot 1, gas pressure relief slot arrange that the gas pressure relief slot 1 is by with permeability along the axis of underground chamber 200
Packing material 2 backfill.
In engineering, it is contemplated that gas pressure relief slot primarily serves the effect for reducing external water pressure, therefore in the construction process should be as possible
Material filling can be just filled if there is ponding in slot by reducing the use of water after must cleaning out.Packing material 2 can guarantee
The influence using function and reduction ponding of underground chamber 200.Packing material 2 can play certain when bearing water pressure
Osmosis；The main component of packing material can be used as sand, stone, flyash and filler, under crustal stress effect, moreover it is possible to
Enough show certain rigidity and bulk modulus.
After the completion of gas pressure relief slot filling, is protected carrying out cover board 3 above, steel plate generally may be used, and removably pacify
Mounted in the notch of gas pressure relief slot, in order to later maintenance, cleaning.
When the width of underground chamber bottom plate 100 is less than or equal to 8m, 1 gas pressure relief slot is arranged, 2 pressure releases are arranged when being more than 8m
Slot；When 1 gas pressure relief slot is arranged, the gas pressure relief slot is arranged in the midpoint of bottom plate 100（As shown in Figure 1）, when 2 gas pressure relief slots of setting
When, at be arranged on baseplate width 1/3 and 2/3（As shown in Figure 2）.
1 width of gas pressure relief slot is 10 ~ 15cm.If wall rock condition is poor, external water pressure is higher, width can also be increased, but
It is not preferably greater than 20cm.
The depth of gas pressure relief slot 1 is the 2/5 ~ 3/5 of underground chamber floor length, it is ensured that effectively cut down external water pressure, it is right
Bottom plate not will produce apparent influence.
The foregoing is merely the structure features of specific embodiment of the utility model, but the utility model to be not limited to
This, any those skilled in the art in the field of the utility model, made by changes or modifications all cover it is new in this practicality
Among the protection domain of type.
Claims (5)
1. a kind of high external water pressure relief features of underground chamber bottom plate, which is characterized in that arrange and let out in the middle part of underground chamber bottom plate
Indent, gas pressure relief slot arrange that the gas pressure relief slot is backfilled with infiltrative packing material, the gas pressure relief slot along underground chamber axis
The upper surface of setting cover board.
2. a kind of high external water pressure relief features of underground chamber bottom plate as described in claim 1, it is characterised in that work as Underground Tunnels
When the width of room bottom plate is less than or equal to 8m, 1 gas pressure relief slot is arranged, 2 gas pressure relief slots are arranged when being more than 8m；When 1 gas pressure relief slot of setting
When, the gas pressure relief slot is arranged in bottom plate midpoint, when 2 gas pressure relief slots are arranged, at be arranged on baseplate width 1/3 and 2/3.
3. a kind of high external water pressure relief features of underground chamber bottom plate as described in claim 1, it is characterised in that pressure release groove width
Degree is 10 ~ 15cm.
4. a kind of high external water pressure relief features of underground chamber bottom plate as described in claim 1, it is characterised in that gas pressure relief slot
Depth is the 2/5 ~ 3/5 of underground chamber floor length.
5. a kind of high external water pressure relief features of underground chamber bottom plate as described in claim 1, it is characterised in that the cover board
It is removably mountable to the notch of gas pressure relief slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721873995.8U CN207775949U (en) | 2017-12-28 | 2017-12-28 | A kind of high external water pressure relief features of underground chamber bottom plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721873995.8U CN207775949U (en) | 2017-12-28 | 2017-12-28 | A kind of high external water pressure relief features of underground chamber bottom plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207775949U true CN207775949U (en) | 2018-08-28 |
Family
ID=63225396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721873995.8U Active CN207775949U (en) | 2017-12-28 | 2017-12-28 | A kind of high external water pressure relief features of underground chamber bottom plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207775949U (en) |
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2017
- 2017-12-28 CN CN201721873995.8U patent/CN207775949U/en active Active
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