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275 results about "Underground storage" patented technology

Transverse tunnel cover method for shallow-buried underground excavation large underground space construction

The invention discloses a transverse tunnel cover method for shallow-buried underground excavation large underground space construction. Foundation pits or pilot tunnels are formed, in the longitudinal direction of underground space, of the tops of side walls of the underground space to be constructed, temporary transverse stress structures are formed inside the foundation pits or the pilot tunnels at a time and located above a top plate of the underground space to be constructed and are controllable in rigidity, the temporary transverse stress structures are connected with piles inside the foundation pits or the pilot tunnels to form a temporary transverse top cover-pile bearing system, and under protection of the transverse top cover-pile bearing system, a single-span or multi-span and a single-layer or multi-layer underground space structure can be constructed in a sequential construction mode or in an inverse construction mode. In shallow-buried underground excavation large underground space structure construction, ground settlement is effectively controlled, constructed building deformation is reduced, the construction risks are reduced, the construction period is shortened, and the construction cost is lowered.
Owner:BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST +1

Layout design method of underground cavern group

ActiveCN103266902AReduce damage and deformationReduce the cost of reinforcement supportUnderground chambersDesign planUnderground cavern
The invention discloses a layout design method of an underground cavern group applied to a water conservancy and hydropower project and an underground storage. According to the layout method, main factors influencing the stability of surrounding rock of the underground caverns, especially, the rock strength stress ratio which is the essential factor can be fully taken into consideration. The method comprises the following steps of: firstly determining the positions of main caverns, determining the axial line directions of the main caverns, determining the thicknesses of rock pillars among the main caverns, and finally determining the shapes of the main caverns, wherein in the process of determining the thicknesses of the rock pillars among the main caverns, the thicknesses of the rock pillars are 1.0-2.5-time mean than excavation span between two adjacent main caverns and are 0.5-0.8 times that of the height of the big one in the adjacent two main caverns. Compared with the layout design with a design plan provided by a using traditional layout method, the layout design with the layout method disclosed by the invention is more scientific; and especially, in a highland stress environment and in a condition with relatively low surrounding rock strength, the phenomena of the deformation and destruction of the surrounding rock after the surrounding rock of the underground cavern group is excavation-unloaded can be greatly reduced or the deformation and destruction degrees of the surrounding rock can be reduced.
Owner:CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE

Sectional synchronous flow rate and water content monitoring and water exploration tubular column of multi-section fracturing horizontal well and working method thereof

InactiveCN104100254AShorten the water search cycleImprove water search efficiencySurveyWater dischargeOil production
The invention discloses a sectional synchronous flow rate and water content monitoring and water exploration tubular column of a multi-section fracturing horizontal well and a working method thereof, and the tubular column is designed for realizing synchronous monitoring and water exploration for all intervals of the horizontal well through one trip of the tubular column. The tubular column is arranged between a screwed plug and an oil well pump, multiple stages of connecting units consisting of underground storage flow rate and water content monitors and packers are connected through oil pipes, and each stage of connecting unit corresponds to one interval respectively; the upper end of the underground storage flow rate and water content monitor at the top stage is connected with the oil well pump through an oil pipe, the oil pipe is connected to a wellhead, and the oil well pump is connected to a ground pumping unit through a sucker rod. The tubular column adopts the underground storage flow rate and water content monitors, so that synchronous flow rate and water content monitoring and water exploration for multiple intervals through one trip of the tubular column can be realized, the original manner that production and water exploration for each interval are separated is converted into the manner of synchronous production and water exploration, the water exploration period can be significantly shortened, the water discharge interval and the water discharge rate can be determined, the water exploration efficiency is improved, and a reliable basis can be provided for water control and oil production enhancement measures for the horizontal well.
Owner:PETROCHINA CO LTD

Large-scale underground cavern group arrangement design method

ActiveCN103291316AReduce deformation and damageReduce the cost of reinforcement supportTunnelsUnderground cavernPrincipal stress
The invention discloses a large-scale underground cavern group arrangement design method applied to hydraulic and hydroelectric engineering and underground storage cavern engineering. According to the arrangement design method, principal factors, especially the essential factor of the rock strength-stress ratio, influencing underground cavern surrounding rock stability can be comprehensively taken into account, the designing scheme for large-scale underground cavern group arrangement can be more scientific, and considered factors are more comprehensive. The position of a main cave is determined at first, the orientation of an axis of the main cave is determined, then the thickness of a rock pillar in the main cave is determined, and at last the shape of the main cave is determined. When the orientation of the axis of the main cave is determined, the trend of a rock mass main structural surface on a construction site and the orientation of the maximum principal stress are measured at first, the orientation of the axis of the main cave is determined according to an included angle between the axis of the main cave and the trend of the rock mass main structural surface and an included angle between the axis of the main cave and the orientation of the maximum principal stress, the included angle between the axis of the main cave and the trend of the rock mass main structural surface is not less than 40 degrees, and the included angle between the axis of the main cave and the orientation of the maximum principal stress is 0-40 degrees.
Owner:POWERCHINA CHENGDU ENG

Large-sized underground cavern group arrangement designing method

ActiveCN104005777AEasy to operateHigh degree of quantificationUnderground chambersUnderground cavernStress ratio
The invention relates to the underground cavern designing method and discloses a large-sized underground cavern group arrangement designing method which is applied to water resources and hydropower engineering and underground storage cavern engineering to scientifically and reasonably confirm positions of the underground cavern group. According to the large-sized underground cavern group arrangement designing method, the rock strength stress ratio, site area crustal stress field characters, the cavern group effect, the main cavern size and the like key factors which influence arrangement of the underground cavern group are considered comprehensively according to the basis that the main cavern group longitudinal axis direction, the main cavern shape and size and the cavern distance are confirmed and the main cavern group valley wall slope rock mass thickness and the overlaying rock mass thickness are further confirmed. The valley slope crustal stress character quantitative analysis method, the valley slope side rock mass thickness computational formula and the cavern group overlaying rock mass thickness confirming method are scientific and reasonable, high in quantization degree, strong in operability, convenient for designer application and applicable to large-sized underground cavern group arrangement and design under various crustal stress levels and complete geological conditions.
Owner:POWERCHINA CHENGDU ENG

Large-scale underground cavern group arrangement method

ActiveCN103291332AReduce deformation and damageReduce the cost of reinforcement supportUnderground chambersUnderground cavernStress ratio
The invention discloses a large-scale underground cavern group arrangement method applied to hydraulic and hydroelectric engineering and underground storage cavern engineering. According to the arrangement method, principal factors, especially the essential factor of the rock strength-stress ratio, influencing underground cavern surrounding rock stability can be comprehensively taken into account, the designing scheme for large-scale underground cavern group arrangement can be more scientific, and considered factors are more comprehensive. The position of a main cave is determined at first, the orientation of an axis of the main cave is determined, then the thickness of a rock pillar in the main cave is determined, and at last the shape of the main cave is determined. When the position of the main cave is determined, the rock strength-stress ratio on a construction site is firstly measured, and when the rock strength-stress ratio is 2.0-4.0, the thickness from the outer edge of the main cave to a rock of a valley slope surface should be larger than 400m; when the rock strength-stress ratio is 4.0-7.0, the thickness from the outer edge of the main cave to the rock of the valley slope surface is 200-400m; when the rock strength-stress ratio is larger than 7.0, the thickness from the outer edge of the main cave to a rock of the valley slope surface is 150-200m.
Owner:POWERCHINA CHENGDU ENG
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