CN113700036B - A ventilation drainage system for shaking table foundation ditch under water - Google Patents
A ventilation drainage system for shaking table foundation ditch under water Download PDFInfo
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- CN113700036B CN113700036B CN202110989929.1A CN202110989929A CN113700036B CN 113700036 B CN113700036 B CN 113700036B CN 202110989929 A CN202110989929 A CN 202110989929A CN 113700036 B CN113700036 B CN 113700036B
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- ventilation
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- collecting tank
- water collecting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/06—Constructions, or methods of constructing, in water
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- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a ventilation and drainage system for a foundation pit of an underwater vibrating table, which comprises an air circulation system and an emergency drainage system, wherein the air circulation system comprises a first air circulation system and a second air circulation system; the air circulation system comprises a ventilation channel and a first ventilation shaft, and the ventilation channel is arranged on the side wall of the underwater vibrating table foundation pit and is communicated with the first ventilation shaft; emergent drainage system includes water catch bowl, emergent drainage channel, outdoor catch basin and inhales the formula suction pump certainly, emergent drainage channel one end with the water catch bowl intercommunication, emergent drainage channel other end with outdoor catch basin intercommunication, it is in to inhale the formula suction pump setting certainly in the outdoor catch basin, the water catch bowl sets up the vibration platform foundation pit bottom least end under water. The invention can effectively solve the problems of simulating the foundation pit bellows effect of the earthquake underwater vibrating table and emergency drainage.
Description
Technical Field
The invention relates to the technical field of foundation construction and tests of civil, water conservancy and ocean underwater vibration tables, in particular to a ventilation and drainage system for an underwater vibration table foundation pit.
Background
With the continuous construction of reservoir dams, water delivery and transfer projects, bridge pier docks and sea-crossing bridges, the continuous deepening of fluid-solid coupling research and the continuous increase of damage phenomena of wading structural projects in the earthquake process, the research on earthquake-water dynamic coupling excitation mechanisms and the earthquake dynamic response rules of structures is more and more concerned by the engineering and scientific circles. The simulated earthquake underwater vibrating table is an improvement of an on-table water pool system additionally arranged on a traditional earthquake simulated vibrating table system, the construction of a large-scale earthquake simulated underwater vibrating table in China is still in a starting stage, and more simulated earthquake underwater vibrating tables are put into construction for scientific research in order to develop earthquake response research of a water-involved engineering structure.
At present, because the table body of the underwater vibrating table for simulating the earthquake is connected with a concrete counterforce foundation by waterproof cloth, a foundation pit at the lower part of the table body becomes an enclosed space, air in the foundation pit can be compressed or expanded in the operation process of the vibrating table, particularly during vertical motion, and high-speed airflow can cause friction, impact and the like on a circuit and an oil pipe in the foundation pit. Therefore, the foundation pit bellows effect needs to be solved in the design and construction process of the underwater vibrating table, the high-speed airflow is prevented from damaging equipment in the foundation pit, and the normal and stable operation of the equipment is ensured.
In addition, the upper portion of the underwater vibrating table for simulating the earthquake is a water tank, when the underwater vibrating table runs into the extreme condition that waterproof cloth is suddenly broken in the operation process, water in the water tank can flow into a foundation pit, and important equipment such as an actuator and an oil pipe in the foundation pit are submerged, so that mechanical equipment is damaged. For this reason, it is necessary to consider the emergency drainage problem in the extreme case during the design and construction of the underwater vibration table to ensure the safety of the equipment.
The existing Chinese patent CN201820945799.5 is a concave waterproof structure of an underwater vibrating table, adopts double-layer concave waterproof cloth, reduces the disturbance effect of a water body on the premise of ensuring a good waterproof effect, solves the waterproof problem, but does not solve the problems of foundation pit bellows effect and water leakage caused by breakage of the waterproof cloth which need to be solved in the design and construction process of the underwater vibrating table. Patent CN202021680424.4 atmospheric pressure automatically regulated device makes the fluctuation of inflation pressure in reasonable within range to guaranteed that the tarpaulin can be stable support the weight of top water, can not cause the performance of equipment influence because of the too high extra effort of pressure to shaking table equipment under water moreover, but this patent does not solve how the problem of urgent drainage when the tarpaulin breaks.
Documents capable of simultaneously solving the problems of wind box effect and emergency drainage in a foundation pit at the lower part of the simulated earthquake underwater vibrating table body are not discovered for a while.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a ventilation and drainage system for a foundation pit of an underwater vibrating table, which can effectively solve the problems of simulating the bellows effect and emergency drainage of the foundation pit of the underwater vibrating table in an earthquake, ensure the structural safety of the underwater vibrating table, and has a simple structure and easy construction.
The invention is realized by adopting the following technical scheme:
a ventilation and drainage system for a foundation pit of an underwater vibrating table comprises an air circulation system and an emergency drainage system; the air circulation system comprises a ventilation channel and a first ventilation shaft, and the ventilation channel is arranged on the side wall of the underwater vibrating table foundation pit and is communicated with the first ventilation shaft; emergent drainage system includes water catch bowl, emergent drainage channel, outdoor catch basin and inhales the formula suction pump certainly, emergent drainage channel one end with the water catch bowl intercommunication, emergent drainage channel other end with outdoor catch basin intercommunication, it is in to inhale the formula suction pump setting from outdoor catch basin, the water catch bowl sets up shaking table foundation ditch bottom under water.
The ventilation and drainage system innovatively combines an air circulation system and an emergency drainage system into a whole, and can simultaneously solve the problems of wind box effect and emergency drainage in a foundation pit at the lower part of the earthquake underwater vibrating table body; when the underwater vibration table body moves vertically downwards, gas in the foundation pit is compressed and is discharged through the air circulation system, when the vibration table body moves vertically upwards, the gas in the foundation pit expands, the gas is sucked through the air circulation system, and the air pressure balance in the foundation pit of the vibration table is kept between breath and suction, so that the high-speed airflow in the foundation pit is reduced, and the problem of the bellows effect in the foundation pit of the underwater vibration table can be well solved; when meeting the extreme condition that the tarpaulin bursts suddenly in the operation of shaking table under water, the water that flows into in the foundation ditch can be collected through the water catch bowl, then gets into outdoor catch basin through emergent drainage channel artesian flow to by the self-priming pump of installing in the outdoor catch basin and discharge, the problem of the emergent drainage in the shaking table foundation ditch under water of solution that can be fine, in order to prevent that actuator in the foundation ditch, important equipment such as oil pipe are submerged.
Preferably, the water collecting tank is of an annular structure surrounding the vibration table foundation pit.
Preferably, a ventilation opening and a second ventilation shaft are arranged in the middle of the emergency drainage channel, and the second ventilation shaft is communicated with the emergency drainage channel through the ventilation opening. The section shape of the emergency drainage channel is rectangular, and the section shapes and the sizes of the second ventilation vertical shaft and the emergency drainage channel are kept unchanged.
Preferably, the upper parts of the first ventilation shaft and the second ventilation shaft are provided with rainproof structures. To prevent corrosion of the structure and to ensure the safety of the structure.
Preferably, the water collecting tank is provided with a trash baffle which is built by a stainless steel structure.
Preferably, the emergency drain channel bottom is inclined toward the outdoor collecting sump. Ensuring the water to be discharged out of the foundation pit by gravity flow.
Preferably, the elevation of the bottom of the water collecting tank is lower than the middle part of the foundation pit of the underwater vibration table, the elevation of the bottom of the emergency drainage channel is lower than the elevation of the bottom of the water collecting tank, and the elevation of the bottom of the outdoor water collecting tank is lower than the elevation of the bottom of the tail end of the emergency drainage channel
In summary, the invention has the following beneficial effects:
(1) The ventilation channel, the first ventilation vertical shaft and the rainproof structure designed by the invention form a ventilation system, and an emergency drainage channel and the second ventilation vertical shaft are utilized to form an air circulation system together; in the operation process of the vibration table, when the table body rapidly operates to cause air compression or expansion in a foundation pit, the air pressure in the foundation pit is kept stable through the air circulating system, the problem of the bellows effect of the foundation pit is effectively solved, and the safety of equipment such as circuits, oil pipes and actuators in the foundation pit is guaranteed, so that the safe and normal operation of the equipment is guaranteed.
(2) When the underwater vibrating table runs into the extreme condition that the waterproof cloth is suddenly broken during operation, the water flowing into the foundation pit can automatically flow into the outdoor water collecting tank through the emergency drainage channel and is discharged by the self-suction type water pump arranged in the water collecting tank, so that important equipment such as an actuator, an oil pipe and the like in the foundation pit are protected.
Drawings
FIG. 1 is a schematic view of the whole of the ventilation and drainage system of the underwater vibration table of the present invention;
FIG. 2 is a schematic longitudinal sectional view of an air circulation system of the underwater vibration table of the present invention;
FIG. 3 is a schematic longitudinal sectional view of an emergency drainage system of an underwater vibration table according to the present invention;
FIG. 4 is a schematic view of the gas flow in the pit when the underwater vibration table is moving vertically downward;
FIG. 5 is a schematic view of the gas flow in the pit when the underwater vibration table is moving vertically upward;
FIG. 6 is a schematic view of an emergency drainage flow of an underwater vibration table;
in the figure: 1. concrete counter-force foundation; 2. a ventilation channel; 3. a first ventilation shaft; 4. a rain-proof structure; 5. a foundation pit of the vibration table; 6. a water collection tank; 7. a trash rack; 8. an emergency drainage channel; 9. an outdoor water collecting tank; 10. a self-suction water pump; 11. and the second ventilating vertical shaft.
Detailed Description
The technical solutions of the embodiments of the present invention will be described below clearly and completely with reference to the accompanying drawings, and it is to be understood 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 of the present invention without any inventive step, are within the scope of the present invention.
Example 1
As shown in fig. 1 to 3, the present embodiment provides a ventilation and drainage system for a foundation pit of an underwater vibration table, comprising an air circulation system and an emergency drainage system; the air circulation system comprises a ventilation channel 2 and a first ventilation shaft 3, wherein the ventilation channel 2 is arranged on the side wall of the foundation pit of the underwater vibrating table and is communicated with the first ventilation shaft 3; emergent drainage system includes water catch bowl 6, emergent drainage channel 8, outdoor catch basin 9 and inhales formula suction pump 10 certainly, emergent drainage channel 8 one end with water catch bowl 6 intercommunication, emergent drainage channel 8 other end with outdoor catch basin 9 intercommunication, it is in to inhale formula suction pump 10 certainly to set up in the outdoor catch basin 9, water catch bowl 6 sets up shaking table foundation ditch bottom under water.
The water collecting tank 6 surrounds the vibration table foundation pit and is of an annular structure.
And a ventilation opening and a second ventilation shaft 11 are arranged in the middle of the emergency drainage channel 8, and the second ventilation shaft 11 is communicated with the emergency drainage channel 8 through the ventilation opening.
The upper parts of the first ventilation shaft 3 and the second ventilation shaft 11 are provided with a rainproof structure 4.
And a trash baffle 7 built by a stainless steel structure is arranged on the water collecting tank 6.
The bottom of the emergency drainage channel 8 is inclined towards the outdoor water collecting tank 9.
The elevation of the bottom of the water collecting tank 6 is lower than the middle part of a foundation pit of the underwater vibrating table, the elevation of the bottom of the emergency drainage channel 8 is lower than the elevation of the bottom of the water collecting tank 6, and the elevation of the bottom of the outdoor water collecting tank 9 is lower than the elevation of the bottom of the tail end of the emergency drainage channel 8.
In this embodiment 1, 2 bottom elevations of ventilation passageway are unanimous with 5 bottom elevations of shaking table foundation ditch, 2 bottoms of ventilation passageway keep the level, ventilation passageway 2 is the rectangle with 3 cross sectional shapes of first ventilation shaft, the size is wide 1 meter, height 2 meters, ventilation passageway 2 is connected with 3 right angles of first ventilation shaft, first ventilation shaft 3 and outdoor intercommunication, rain-proof structure 4 that 3 upper portions of first ventilation shaft set up can prevent that the rainwater from getting into ventilation passageway 2 through 3 of first ventilation shaft, and then get into shaking table foundation ditch 5, submerge the oil pipe in the foundation ditch, important equipment such as actuator, cause the influence to the equipment in the foundation ditch.
In this embodiment 1, the bottom elevation of the peripheral water collecting tank 6 is lower than the elevation of the vibrating table foundation pit 5 to ensure that the water can be rapidly collected, and the water collecting tank 6 surrounds the vibrating table foundation pit 5 to form an annular structure and is located right below the waterproof cloth of the vibrating table and the peripheral counter-force foundation; and a trash baffle plate 7 is arranged at the top of the peripheral water collecting tank 6, and the trash baffle plate 7 is of a stainless steel structure so as to prevent the structure from being corroded and ensure the structure safety. The water collecting tank 6 is provided with a notch, the notch is connected with the emergency drainage channel 8, the elevation of the peripheral water collecting tank 6 at the position is consistent with that of the bottom of the emergency drainage channel 8 and is lower than that of the bottom of the peripheral water collecting tank 6 at other positions, the section of the emergency drainage channel 8 is rectangular, the size of the emergency drainage channel is 2m in width and 1m in height, and the bottom of the emergency drainage channel inclines outdoors to ensure the self-flowing discharge of the water body. The tail end of the emergency drainage channel 8 is connected with an outdoor water collecting tank 9, the outdoor water collecting tank 9 is of a cuboid structure, the size of the outdoor water collecting tank is 3m in width, 4m in length and 8m in depth, the bottom elevation of the outdoor water collecting tank 9 is lower than that of the tail end of the emergency drainage channel 8, and two self-suction water pumps 10 are arranged in the outdoor water collecting tank 9. The middle part of the emergency drainage channel is provided with a second ventilating shaft 11, the shape and the size of the section of the second ventilating shaft 11 and the emergency drainage channel 8 are kept consistent, and the second ventilating shaft 11 and the first ventilating shaft 3 are arranged side by side and share one rainproof structure 4.
As shown in fig. 4-5, the ventilation channel 2, the first ventilation shaft 3, the rainproof structure 4, the emergency drainage channel 8 and the second ventilation shaft 11 together form an air circulation system of the vibration table; when the vibration table body vertically moves downwards, gas in the foundation pit is compressed, and the gas is discharged through an air circulation system; when the vibration table body moves vertically upwards, gas in the foundation pit expands, and the gas is sucked in through the air circulation system; one breath keeps the air pressure balance inside the foundation pit of the vibrating table between one breath and one breath, thereby reducing the high-speed airflow inside the foundation pit, protecting the circuits, the oil pipes, the actuators and other important equipment in the foundation pit, and well solving the problem of the bellows effect of the foundation pit in the underwater vibrating table for simulating the earthquake.
As shown in fig. 6, an emergency drainage system is formed by the water collection tank 6, the trash baffle 7, the emergency drainage channel 8, the outdoor water collection tank 9 and the self-suction water pump 10; when the underwater vibration table runs in an extreme case that the waterproof cloth is suddenly broken, water flowing into the foundation pit is collected through the water collecting tank 6, automatically flows into the outdoor water collecting tank 9 through the emergency drainage channel 8, and is pumped out through the self-suction water pump 10 arranged in the outdoor water collecting tank 9; the emergency drainage problem of the foundation pit in the simulated earthquake underwater vibration table can be well solved by preventing the actuator, the oil pipe and other important equipment in the foundation pit from being submerged.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A ventilation and drainage system for a foundation pit of an underwater vibrating table is characterized by comprising an air circulation system and an emergency drainage system; the air circulation system comprises a ventilation channel and a first ventilation shaft, and the ventilation channel is arranged on the side wall of the foundation pit of the underwater vibrating table and is communicated with the first ventilation shaft; the emergency drainage system comprises a water collecting tank, an emergency drainage channel, an outdoor water collecting tank and a self-suction water pump, wherein one end of the emergency drainage channel is communicated with the water collecting tank, the other end of the emergency drainage channel is communicated with the outdoor water collecting tank, the self-suction water pump is arranged in the outdoor water collecting tank, and the water collecting tank is arranged at the bottom of the foundation pit of the underwater vibration table;
a ventilation opening and a second ventilation vertical shaft are arranged in the middle of the emergency drainage channel, and the second ventilation vertical shaft is communicated with the emergency drainage channel through the ventilation opening;
when the vibration table body vertically moves downwards, gas in the foundation pit is compressed, and the gas is discharged through the air circulation system; when the vibration table body moves vertically upwards, gas in the foundation pit expands, the gas is sucked through the air circulation system, and the air pressure balance in the foundation pit of the vibration table is kept between every two breath.
2. The ventilated drainage system for an underwater shaker foundation pit of claim 1, wherein the water collection sump is in an annular configuration around the shaker foundation pit.
3. The ventilation and drainage system for the foundation pit of the underwater vibration table as claimed in claim 1, wherein the upper parts of the first ventilation shaft and the second ventilation shaft are provided with a rainproof structure.
4. The ventilation and drainage system for the foundation pit of the underwater vibrating table as claimed in claim 1, wherein a trash plate built by a stainless steel structure is arranged on the water collecting tank.
5. The ventilation drainage system for a foundation pit of an underwater vibration table as claimed in claim 1, wherein the emergency drain channel bottom is inclined toward the outdoor water collection tank.
6. The ventilation and drainage system for the foundation pit of the underwater vibrating table as claimed in claim 1, wherein the elevation of the bottom of the water collecting tank is lower than the middle of the foundation pit of the underwater vibrating table, the elevation of the bottom of the emergency drainage channel is lower than the elevation of the bottom of the water collecting tank, and the elevation of the bottom of the outdoor water collecting tank is lower than the elevation of the bottom of the tail end of the emergency drainage channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110989929.1A CN113700036B (en) | 2021-08-26 | 2021-08-26 | A ventilation drainage system for shaking table foundation ditch under water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110989929.1A CN113700036B (en) | 2021-08-26 | 2021-08-26 | A ventilation drainage system for shaking table foundation ditch under water |
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| Publication Number | Publication Date |
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| CN113700036A CN113700036A (en) | 2021-11-26 |
| CN113700036B true CN113700036B (en) | 2022-12-27 |
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| CN202110989929.1A Active CN113700036B (en) | 2021-08-26 | 2021-08-26 | A ventilation drainage system for shaking table foundation ditch under water |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191010663A (en) * | 1910-04-30 | 1910-09-15 | Isaac Shone | Improvements in and connected with Sewerage Systems. |
| GB714638A (en) * | 1951-08-08 | 1954-09-01 | Alfred Woehr | Greenhouse |
| US4949626A (en) * | 1987-02-12 | 1990-08-21 | Radon Appliances, Inc. | Protective system |
| UA75384C2 (en) * | 2003-08-05 | 2006-04-17 | Volodymyr Ivanovych Derevianko | Wind-power hydro-heat-accumulating unit |
| SG157260A1 (en) * | 2008-06-02 | 2009-12-29 | Keppel Offshore & Marine Techn | Offshore foundation system with integral elements for preloading and extracting |
| AU2011200500A1 (en) * | 2011-02-07 | 2012-08-23 | Drago MIKAC | Flood and fire-proof house |
| CA2857112A1 (en) * | 2014-07-11 | 2016-01-11 | Tiemen J. Van Der Horn | Precipitation shield |
| CN205669251U (en) * | 2016-06-07 | 2016-11-02 | 国网山东省电力公司莱芜供电公司 | Cable duct automatic ventilation drainage arrangement |
| CN206625334U (en) * | 2017-03-23 | 2017-11-10 | 北京四汇建筑工程有限责任公司 | Basement water collection pit draining, exhaust structure |
| CN109489175B (en) * | 2018-11-12 | 2020-09-29 | 浙江秀禾建筑设计有限公司 | Underground ventilation system |
| CN111707443A (en) * | 2020-07-30 | 2020-09-25 | 青岛理工大学 | Basin test system of many field coupling of simulation offshore structure thing |
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