493 results about "Deep excavation" patented technology

The invention discloses a traffic flow prediction method based on a deep learning nerve network structure. Various kinds of traffic flow data are collected, a depth automatic encoder model is utilized for training the collected various kinds of traffic flow data, the depth automatic encoder model is adjusted in the training process, and finally, the adjusted depth automatic encoder model is used for predicting a short-period traffic flow. By adopting the method, deeper excavation analysis is carried out on traffic flow data, so that the short-period prediction of the traffic flow is more accurate, and the performance is better.

The invention belongs to the building support component technology field including the stress automatic control and monitoring as well as the structural safety, and relates to a steel tube supporting internal force automatic compensating and displacement controlling system. The system comprises an upper system, a PLC control system module and a field executive system. A steel support is arranged on a reinforced concrete diaphragm wall, a hydraulic jack is arranged on the steel support, and real time pressure monitoring values are fed back through a pressure sensor. The steel support and the hydraulic jack form a pre-stressed steel support structure, the hydraulic jack is connected with a hydraulic pump station through an oil circuit, and is connected with the PLC control system module through the pressure sensor, the hydraulic pump station is connected with the PLC control system module, and a PLC controlling device is connected with the upper system. Through auto-control software and a PLC control system, the automatic control to the axial force of the steel support is realized, thereby controlling the displacement and the settlement of the deep excavation supporting structure and the adjacent basic facilities.

The invention discloses an AFC data-based public transport passenger flow OD real-time estimation method. The method utilizes card swiping data of a public transport AFC system, performs sorting to obtain bus station passenger flow, on this basis excavates a mapping relation between public transport passenger flow OD and the bus station passenger flow, and builds a public transport passenger flow OD real-time estimation model based on Kalman filtering, thereby realizing real-time estimation of the public transport passenger flow OD. The AFC data-based public transport passenger flow OD real-time estimation method provided by the invention performs deep excavation on passenger flow data of the public transport AFC system, and obtains an optimal estimation value of a public transport passenger flow distribution probability through the Kalman filtering model, thereby realizing real-time estimation of the public transport passenger flow OD, which is of great importance to accurately describing the public transport passenger flow demand distribution law and realizing real-time optimization of bus route operation dispatching.

The invention relates to a construction method for deep-foundation pit excavation. After foundation pit fender structure construction is finished, an excavation machine is used for excavating and an earthwork vehicle is used for transporting out the earthwork. The construction method is characterized by comprising the following steps of: a. earthwork excavation for the first time: uniformly excavating from every corner of the foundation pit to the center by dividing three regions in a retreating manner; b. fender supporting structure construction and maintenance: pouring the fender supporting structure, and carrying out next-step construction when the supporting concrete strength achieves 80% of the design strength; and c. earthwork excavation for the second time: carrying out earthwork excavation below the fender supporting structure, selecting excavation equipment, excavating, and transporting out the earthwork in the pit in a two-stage overturning and transferring manner to finish excavation. The construction method for deep-foundation pit excavation has the advantages of being reasonable in construction step design, simple to operate and safe and reliable in excavating engineering, lowering engineering construction cost, saving construction period, and being obvious in economic benefit.

The invention discloses a testing device and a testing method for rock cracked through coupling of dynamic static load and water pressure. The testing device comprises a Hopkinson pressure rod device and a manual pressure pump. The Hopkinson pressure rod device comprises a high-pressure air tank, a punch, an incident rod, a data collecting processing system, an extension rod and an axial static pressure loading device. A testing piece and a water pressure loading pressure head are arranged between the incident rod and the extension rod, and the manual pressure pump with a pressure meter is connected with the water pressure loading pressure head through a sleeve. The method includes that first, axial static pressure is exerted on the testing piece through the axial static pressure loading device, then water pressure is exerted on the testing piece and adjusted to a preset value through the manual pressure pump with the pressure meter, the high-pressure air tank drives the punch to impact the incident rod, and finally collected data is processed. The testing device and the testing method achieve testing of dynamic mechanics characteristics of the rock in a laboratory under the condition of the coupling of water pressure seepage and dynamic and static stress and can better simulate deep excavation conditions.

The invention discloses a deep foundation pit combination supporting construction method for geology with high water level and large particle size sand gravel. High pressure jet grouting pile construction is conducted outside a foundation ditch retaining and protecting system, by means of a triple placing method, cement paste is injected into underground soil filling layer and sand gravel gaps, after solidifying, secant pile wall and retention wall are formed, the underground water is prevented outside the periphery the foundation ditch retaining and protecting system, and conditions are created for the construction of a support pile; when the strength of outer side jet grouting pile meets design requirements, a long auger drilling cast-in place pile begin to be constructed close to the inner side of the jet grouting pile; after perfusion pile beings maintained for 15 days, jet grouting pile construction begins to conduct to make up partial failure of waterproof curtain of the jet grouting pile in construction of retaining and protecting pile, and retaining and protecting strength and water interception effect of the retaining and protecting system are increased; at last, in an earth excavation process, bar-mat reinforcement sprayed concrete slope protection and construction of dewatering well, open trench and water-collecting well in the foundation ditch are completed well, multiple retaining and protecting forms are used for combining construction and interaction. Accordingly, the problems of retaining and protecting the geology with high water level and large particle size sand gravel and processing the geology are solved.

The invention relates to a construction method optimizing deep foundation pit changing supporting construction sequences. Top-down method sequence construction is adopted, and a supporting structural system of a foundation pit is formed by a drill hole potting supporting pile and a waterproof curtain. When foundation pit grooving is carried out, an original soil layer below a changing supporting structure is reserved, after the foundation pit grooving and construction of foundation brick dies are completed, the changing supporting structure and a cushion layer are poured simultaneously, the changing supporting structure and the foundation brick dies are utilized at the same time to serve as a bottom plate outer die, pouring of a foundation mat is carried out when waterproof construction is finished, and an upper part horizontal supporting structure can be dismantled when both strength of the changing supporting structure and strength of concrete of the foundation mat reach strength when the horizontal supporting structure can be dismantled. The construction method optimizing the deep foundation pit changing supporting construction sequences has the advantages of eliminating cleaning of sundries and back-fill consolidation soil operation construction, shortening a construction period, and reducing risks of the foundation pit.

The invention discloses a method for deep excavation pit combination support construction close to a subway station. The method is safe, reliable, short in construction period and low in construction cost and comprises the following steps that (1) two rows of reinforced concrete cast-in-place concrete piles are arranged at the outer side of an underground structure of an entrance and an exit of the subway station for blocking soil; (2) a single row of reinforced concrete cast-in-place concrete piles are arranged at the inner side of the underground structure of the exit and the entrance of the subway station; (3) coupling beams at the top of the reinforced concrete cast-in-plate concrete piles are constructed; and (4) when each coupling beam reaches to strength, earth excavation to a deep excavation pit is performed and in the process of excavation, a plurality of rows of steel tube inner supports are arranged transversally from top to bottom between the single row of reinforced concrete cast-in-place concrete piles and the deep excavation pit and meanwhile and meanwhile, soil nailing wall reinforce is adopted to the bottom of the underground structure of the exit and the entrance of the subway station in a matched mode until the earth excavation is performed to the bottom of the deep excavation pit.

The invention discloses a method for evaluating the health of an aircraft aileron actuator system based on the multi-fractal theory and the self-organizing map (SOM) network. The method comprises the following steps that firstly, residual error data are obtained by virtue of a fault observer established by the aircraft aileron actuator system; secondly, a residual error signal is subjected to deep excavation for system health information by a multi-fractal detrended fluctuation analysis method; and thirdly, an acquired generalized Hurst index is input into the SOM network to evaluate the health condition of the aircraft aileron actuator system. The validity of the method is verified by combining simulation data of four common typical fault modes of an aileron actuator, and experiment results indicate that the method can be used for effectively evaluating the health condition of the aileron actuator system.

The invention discloses a method for plugging a relief well of a deep foundation pit. The method comprises the following steps of (1) necessary preparation before relief well plugging; (2) plugging construction on the relief well, wherein after base plate construction is completed, a body structure meets anti-floating requirements, and a fixed water level in a relief well in the foundation pit is located 2-3m below a foundation pit face, the plugging construction on the relief well can be carried out, the relief well in a working state is firstly plugged in an interval mode due to a large water yield, after the relief well is partially plugged, the working state of the relief well which is not plugged continues to be observed and comprises the water yield condition, the variation value of the water level, the fixed water level elevation and the water pump position elevation, the rest of the relief well continues to be plugged in an interval mode, and time is earned for well plugging by increasing pump output. The method has the advantages that the relief well can be successfully plugged when underwater pressure or water inflow is large, plugging quality is good, construction cost is lowered, and the method is worthy of popularization and application.

The invention discloses loess high fill in hill removing and gully filling projects and a construction method of the loess high fill, and relates to the technical field of high fill processing. The loess high fill and the construction method are used for solving the problem that in the prior art, because of high fill deep excavation, saturated yielding is caused and finally differential settlement of foundations and side slope deformation damage are caused. The loess high fill in the hill removing and gully filling projects is sequentially composed of a lime pile composite foundation layer, a rubble water drainage layer and a loess layer from bottom to top. By means of the loess high fill in hill removing and gully filling projects and the construction method of the loess high fill, the compression strength, tensile strength and shear strength of the whole loess high fill are improved, and the anti-seismic and anti-shock performance of the loess high fill are enhanced; and by laying and combining a composite geomembrane, a rubble layer and a three-dimensional composite water drainage net, water drainage channels inside the high fill are formed, and the phenomenon that because of high fill deep excavation, saturated yielding is caused and finally differential settlement of the foundations and side slope deformation damage are caused is effectively eliminated.

The invention provides a deformation estimation method for a deep foundation pit support structure in soft soil strata. The method comprises steps as follows: firstly, according to fitting analysis for a measured curve of support structure deformation caused by excavation of a large quantity of deep foundation pits in the soft soil strata, a concept of strata loss theory is introduced, and a deformation calculation model for the deep foundation pit support structure in the soft soil strata is constructed; by reference to thoughts of a shield tunnel surface subsidence Peck formula, a Schmidt formula and a triangular subsidence formula, an area of a support structure deformation enveloping curve can be obtained through an area of an enveloping curve of surface subsidence behind a wall, and an area B of the enveloping curve of surface subsidence behind the wall is calculated; a deformation estimation calculation formula for the deep foundation pit support structure in the soft soil strata is derived out according to the former formulae; finally, values of parameters are substituted into the deformation estimation calculation formula for the deep foundation pit support structure in the soft soil strata, and a deformation value of any point of the support structure can be calculated. A fitting curve of deformation of the support structure is highly fitted with a measured result curve by adopting a Gaussian function, and the effect is good.

The present invention relates to an adaptive dynamics coordination control method of a space manipulator. On the basis of deep analysis of space manipulator system kinematics and dynamics characteristics, a typical space manipulator kinematical equation is subjected to augmenting, and a space manipulator 'extended kinematics equation' capable of description of the tail end motion of the space manipulator and the attitude motion of a spacecraft is obtained; and on the basis of deep excavation of the space manipulator system kinetic equation and angular momentum conservation equation characteristics, a spacecraft reference speed and a joint space reference speed are respectively defined, and a space manipulator adaptive dynamics coordination controller is designed on this basis. The adaptive dynamics coordination control method between the space manipulator and a pedestal spacecraft can control the motion of the space manipulator to reach the purpose of space manipulator tail end locus tracking and pedestal spacecraft attitude regulation at the same time in the condition that system parameters have nondeterminacy.

The invention discloses a key IP address safety alarm association analysis method based on a fuzzy scene. The method comprises the steps of: firstly, utilizing a statistic method to aggregate alarms, then utilizing a strategy to neglecting and filtering the alarms, finally utilizing an association analysis algorithm based on the fuzzy scene to calculate an event suspected degree corresponding to a source IP, and utilizing a big data analysis method to carry out statistic querying on alarm logs related to a suspected IP. According to the invention, the concept of fuzzy scene is innovatively provided, and a conventional analysis mode by constructing an attack scene is broken through, wherein the association analysis mode of the fuzzy scene is characterized in that deep excavation and association analysis are carried out on a large number of related safety alarm events with the IP address serving as the core. Related factors of the alarms, which may influence the IP safety, are analyzed, the factors are analyzed in an integrated manner, and a suspected degree value reflecting the safety condition of the IP is obtained by an event suspected degree calculation formula.

The invention relates to a prefabricated concrete assembled foundation, which comprises at least one prefabricated core concrete block and at least one prefabricated splicing concrete block. Fixing components which are used for fixing an iron tower are embedded in the core concrete block. Each of the core concrete block and the splicing concrete block is provided with first through holes which extend along a first direction, and second through holes which extend along a second direction. The prefabricated concrete assembled foundation additionally comprises prestressed reinforcement components. Each prestressed reinforcement component comprises prestressed reinforcement. The prestressed reinforcement penetrates through the first through holes or the second through holes of the core concrete block and the splicing concrete block to fix the core concrete block and the splicing concrete block together. By assembling the prefabricated concrete blocks to form the prefabricated concrete assembled foundation, the prefabricated concrete assembled foundation is only required to be installed on the firm ground, deep excavation is not required, the weight of a single concrete block is light, the generality is good, the manual handling is facilitated and the operation in mountainous areas or roofs is facilitated.

According to the invention, a three-dimensional numerical model of deep foundation pit excavation deformation stability in a construction area is established on the basis of the physical and mechanical parameters of deep foundation pit rock soil, hydrological engineering geologic conditions of deep foundation pit regions and FLAC3D technology, and a three-dimensional visual safety pre-warning platform of deep foundation pit stability is built based on VTK business software systems. The real-time monitoring data of horizontal displacement of guard piles, horizontal displacement of crown girders and bump deformation at the bottom of foundation pits are collected through a full-section laser scanner and transferred to a remote monitoring and data processing host machine. The three-dimensional numerical model of deep foundation pit excavation deformation stability performs model parameter correction by use of the data of initial digit groups and compares the subsequent measured data with the model parameter threshold values, and the three-dimensional visual safety pre-warning platform of deep foundation pit stability shows the comparison results and provides pre-warning of safety levels of the over-warning parameters. All the pre-warning messages are sent to mobile phones of relevant personnel and also fed back to audible and visual alarms which are mounted on the working plane of the construction area to give sound and light alarms.

The invention brings forward a space power load prediction method based on a load density coordination coefficient. The method is characterized by comprising the steps of generating cells, determining classification load density coordination coefficients, solving classification load density indexes and establishing a model. Through introducing a new coordination coefficient calculation method, different load densities of the same kind of loads in the different cells and the development trend of the load density coordination coefficient of the same cell can be better demonstrated, and the problem of nonuniform distribution of the same kind of loads in the different cells can be overcome. According to the invention, deep excavation of historical load data is realized according to constraint relations between actually measured cell historical loads and power supply areas, land information and classification load densities, and the load on each unit area is predicted under specific power load space resolution. The method provided by the invention has the advantages of being scientific and reasonable and being easy and simple to implement, accuracy in prediction and high in adaptability, thereby being suitable for city space load prediction.

The invention provides a method and system for remote intelligent monitoring and three-dimensional digital early warning of deep foundation pit bottom surface upheavals. A construction region deep foundation pit deformation stability three-dimensional numerical model is built based on deep foundation pit rock and earth mass physical and mechanics parameters, deep foundation pit region hydrogeological and engineering geological conditions and an FLAC3D technology. A deep foundation pit bottom surface upheaval deformation three-dimensional visualized safety early warning platform is built based on a VTK business software system. Foundation pit bottom surface upheaval deformation real-time monitoring data are acquired through a hydrostatic balance level and transferred to a remote monitoring and data processing machine, initial groups of data are utilized to finish parameter modification of the deep foundation pit deformation stability three-dimensional numerical model, follow-up real-time data and model parameter threshold values are compared, and the deep foundation pit bottom surface upheaval deformation three-dimensional visualized safety early warning platform shows and perform grading safety early warning to alert-exceeding parameters. All of early warning information is sent to mobile phones of relevant persons, and accordingly the remote intelligent monitoring and the three-dimensional digital early warning of the deep foundation pit bottom surface upheavals are finished.

The invention provides a construction method for digging a deep foundation pit in a large-thickness highly weathered sandstone stratum in a combined supporting mode, and relates to the technical field of complex geology deep foundation pit supporting construction in constructional engineering. According to the construction method, highly weathered sandstone stratum supporting is divided into two parts, the upper part of the sandstone stratum adopts a hollow anchor bolt shotcrete and rock bolt supporting mode, and a high-pressure jet grouting pile supporting mode is adopted 3 meters above a base. By means of the construction method, the problems in excavation, water sealing-up and supporting under the complex geology conditions that the highly weathered sandstone is not exposed evenly and large in thickness, and fissure water is not distributed evenly are solved effectively, the phenomena of fissure water and subsurface erosion of the large-thickness highly weathered sandstone stratum are effectively prevented, and softening and quicksand of the base are prevented.