116 results about "Seismic safety" patented technology

A method for predicting seismic safety for extremely large engineering project includes using finite element (FE) preprocessing software to set up FE module, inputting parameters required by active time histories of seism for obtaining mathematical module, transmitting the model and time step length to supercomputer to carry out transient response analysis and model analysis for parallel calculation, sending data back to FE analysis software for following calculation and carry out visual processing by using FE post processing software to read in calculation result .

The invention provides an anti-seismic safety assessment method of a fortification-exceeding intensity earthquake of an engineering structure, and the method is characterized by comprising the following steps of (1) giving an earthquake level of frequently-occurred intensity, basic intensity, rare intensity and fortification-exceeding intensity in the place where the project is located; (2) demarcating the displacement or the displacement angular benchmark of the frequently-occurred intensity and the rare intensity; (3) matching the seismic oscillation of the frequently-occurred intensity, the basic intensity, the rare intensity and the fortification-exceeding intensity with the structure behavior through a static push-over analysis method or an increment power analysis method; and (4) drawing a structural capacity curve and a seismic oscillation curve, and judging whether the dual-control performance of the force and the displacement meets the requirement or not. The method has the beneficial effects that design evaluation is carried out for the uncertainty of the set fortification intensity, the safety, robustness and collapse resistance of the engineering structure can be improved, and no mature method can be referred especially for the anti-seismic safety assessment method in the international market.

The invention discloses a three-dimensional seismic isolation structure system. The three-dimensional seismic isolation structure system comprises a foundation, and a plurality of horizontal seismic isolation devices, a plurality of vertical seismic isolation devices, a rigid floor slab and an upper structure which are fixedly stacked on the foundation in sequence; a plurality of lateral baffles are fixedly arranged on the foundation for isolating the peripheries of the multiple horizontal seismic isolation devices, and the lateral baffles are connected with the rigid floor slab through negative rigidity connecting devices. According to the three-dimensional seismic isolation structure system, the three-dimensional six-direction rigidity self-adaptive capacity is formed through a three-dimensional seismic isolation system, so that the three-dimensional seismic isolation structure system has the capacity of isolating three-dimensional three-direction subway vibration and three-dimensional six-direction seismic vibration, and the comfort performance of a building under the action of subway vibration and the seismic safety of the building under the action of earthquakes are guaranteed.

The invention provides a fabricated anti-seismic shear wall structure capable of recovering functions. A bottom layer conversion connecting part, a high-performance filling block body and a slotted steel plate are arranged in a bottom layer wall body of the shear wall structure capable of replacing parts, an energy-consuming connecting steel plate in the bottom layer conversion connecting part can provide tensile and shear bearing capacity for the structure, the high-performance filling block body provides compression and shear bearing capacity, and the slotted steel plate can complementally and provide the shear bearing capacity. Resistant-lateral rigidity and strength of a novel shear wall are guaranteed, and when the bottom wall body of the structure is damaged under the action of a strong earthquake, the structure can recover to the original function level after the earthquake by replacing the energy-consuming connecting steel plate, the high-performance filling block body and the slotted steel plate; and in addition, through four types of replaceable parts and matching of the replaceable parts and non-replaceable parts, the shear wall has four anti-seismic defense lines, and it is guaranteed that the anti-seismic safety of the structure is improved.

The invention discloses a structural vulnerability analysis method considering an initial damage state under a seismic sequence, and belongs to the technical field of structural seismic safety assessment. According to the method, the problems of poor vulnerability analysis accuracy and low calculation efficiency of an existing structural vulnerability analysis method under multiple earthquakes aresolved. According to the method, by establishing the combined seismic demand model and the two-dimensional limit state, the influence of the initial damage state on the seismic capacity of the structure can be effectively considered in limit state overrun probability calculation, so that the accuracy of safety assessment of the structure under the seismic sequence is improved. Moreover, the method can consider various initial damage states caused by different primary earthquakes in IDA analysis at the same time, and avoids a process of simulating a specific damage state in a traditional method, so that the calculation efficiency is improved, the calculation cost is reduced, and the method is more convenient for practical application. The method can be applied to the technical field of structural anti-seismic safety assessment.

The invention provides a finite element analysis method for spent nuclear fuel storage grid seismic safety. The method comprises the following steps that: according to the maximum value and the minimum value of a friction coefficient between a pool bottom plate and grid supporting feet, determining a finite element analysis object; independently establishing and calculating the finite element model for the finite element analysis object, wherein the step of establishing and calculating finite element model comprises the following steps that: determining a finite element analysis method; simplifying the structure of the finite element analysis object; selecting a finite element unit used for modeling, and carrying out mesh generation on the finite element unit; selecting the physical property parameter of the finite element model; determining a finite element model boundary condition; and calculating the finite element model to obtain a finite element model calculation result. According to the finite element analysis method, under a condition that the grid of the same structure is assumed and the same seismic load is stipulated, load, stress and strain borne by the grid can be analyzed so as to check whether grid strength, deformation and displacement can meet safety requirements during earthquakes according to an analysis result.

The present invention discloses a detection method of coal mine underground reservoir coal pillar dam body earthquake safety. The method comprises the following steps of 1: establishing a numerical value model for a to-be-detected coal mine underground reservoir; 2: utilizing a numerical value simulation method to analyze, primarily determining the possibly damaged positions Ai on a coal pillar dam body of the coal mine underground reservoir on an earthquake condition; 3: designing a similar material physical model according to a numerical value result in the step 2, and carrying out a vibration test on the similar material physical model; 4: obtaining the shearing stresses tau i of the damaged positions Ai according to a vibration test result in the step 3; 5: calculating the earthquake safety coefficients Ki of the damaged positions Ai. The method of the present invention can evaluate the seismic safety of the coal mine underground reservoir coal pillar dam body on the mine earthquake or earthquake condition, and can give out a quantitative evaluation result of the coal mine underground reservoir anti-seismic property by aiming at the structure of the coal mine underground reservoir, and combining the rock breaking theory, the numerical value simulation method and the physical model test.

The invention belongs to a subway station tunnel connecting section structure post-constructed-type construction method which comprises the steps of level measurement, primary-support inverted arch section grille arching mounting, primary-support inverted arch concrete construction and waterproof laying, secondary-lining inverted arch construction, arch wall steel bar binding, additional groove section formwork erecting, additional groove section concrete pouring, additional groove connecting section waterproof construction and concrete backfill construction. The bottom of a great ascent opencut foundation pit serves as a material field, meanwhile construction of a station and a subway running tunnel communicating with the station is conducted, then post-constructed-type construction of asubway station tunnel connecting section structure is conducted, the tunnel construction progress is accelerated, the difficult problems of cross construction and mutual interference of the station and the tunnel are avoided, discharging openings are prevented from being reserved in the station, and the integrality and anti-seismic safety of the station are improved; and the subway station tunnelconnecting section structure post-constructed-type construction method can solve the difficult problem of narrow space construction effectively, and has the advantages of being safe, reliable, low incost, convenient to operate, low in construction risk, capable of shortening the construction period and good in using effect.

The invention relates to an earthquake safety shutoff value. A valve body is connected with a valve port; a steel ball is arranged on a positioning grove of a left plate; a contactor on an alarm device is in point contact with the steel ball; an upper pin is used to connect the left plate with a right plate; a lower pin is inserted into the lower end of the left plate; a locking plate is connected with an spiral arm support through a connecting screw rod; a valve port pad is fixed on the connecting screw rod by a snap spring; a bush is embedded into the valve body, and a bush hole is connected with the top of a resetting shaft; the spiral arm support is connected with the hexagonal position of the resetting shaft; one end of a torsional spring is fixed on the valve body, while the other end is clamped on the spiral arm support; a sealing plug screw is screwed into the valve body; a reset wrench is connected with the resetting shaft; and an outer casing is arranged on a vibration dropping device. When more than 5.5 magnitude of earthquake occurs, a shutoff device and the vibration dropping device can quickly close the valve, shut off a fuel gas source in a pipeline, and ensure the safety of the fuel gas pipeline; and when the earthquake occurs, the alarm device can produce alarm sound within about 1 second to remind operating personnel of shutting down or working personnel of immediately escaping or being evacuated to safe places further to ensure the life security of people.

The invention discloses a structural seismic capacity evaluation method considering the influence of an initial damage state, and belongs to the technical field of structural seismic safety evaluation. According to the method, the problem that the accuracy of evaluating the seismic capacity of the structure after the main earthquake is low due to the fact that the initial damage state is not considered in existing research on the seismic capacity of the structure is solved. According to the method, the influence of initial damage on the seismic capacity of the structure can be effectively considered; the shock resistance of the structures with different damage degrees can be reflected by selecting the data obtained by IDA analysis; a two-dimensional limit state equation of the structure can be obtained by performing regression analysis on the screened data, and the equation can effectively consider the correlation between the initial damage degree and the residual earthquake resistance, so that the accuracy of evaluating the earthquake resistance of the structure after the main earthquake is improved. The method can be applied to the technical field of structural anti-seismic safety assessment.

The present invention relates to an overturning operating disassembly type bevel edge earthquake safety door which can still be opened under the condition that door and windows are extruded to be jammed in earthquake. The earthquake safety door consists of a transversely overturning operating disassembly type bevel edge earthquake safety door and an up-down overturning operating disassembly type bevel edge earthquake safety door. The components of the two doors are all provided with a safety door surrounding pane. The inner edge of the pane is a bevel and is provided with a bevel demountable safety door, the edges of which are all bevels which are matched with the inner edge bevel of the connected pane. Four bolts, pins which are movably connected with connecting rods, a safety door disassembly operating rod, an overturning shaft and two operating bolt flexible overturning plates are arranged in the bevel demountable safety door. Four connecting rods are extended from two overturning plates and are provided with four pins by movable connection. Four connecting rods are mounted with four bolt springs and four spring catch bases. Four movable bolts are exactly opposite to four bolt holes, a doorframe, etc. The invention has the characteristics and advantages that the overturning operating disassembly type bevel edge earthquake safety door is just as adding a safety door in the ordinary door; people can pass through the safety door usually, the difference lies in that the safety door is connected with the pane bevel by the bevel; according to the theory that the bevel is not jammed easily by extruding slide, when earthquake occurs, the ordinary door is extruded, deformed and jammed and can not be opened, the bevel demountable safety door can also be opened; the safety door is simple and fast for operating and also has the prior nice and theftproof functions.

A large-corner high-friction shock-absorbing and shock-isolating support comprises a left laminated rubber block and a right laminated rubber block, a bottom plate, a lower seat board, a middle seat board, an upper seat board, a low-friction-coefficient friction pair, a high-friction-coefficient friction pair, a shearing pin, a stopper and a vertical follower mechanism, wherein horizontal displacement occurs between the upper seat board and the bottom plate, and the laminated rubber block has shearing deformation for providing a restoring force; both the stopper and the shearing pin are used for bearing the horizontal force; the stopper has relatively high designed bearing capacity and cannot be destroyed under the action of any earthquake; the shearing pin has relatively low designed bearing capacity and can be sheared under the action of a great earthquake; the low-friction-coefficient friction pair is used for meeting requirements of corners; the high-friction-coefficient friction pair is used for dissipating earthquake capability. The large-corner high-friction shock-absorbing and shock-isolating support provides vertical bearing capacity and horizontal bearing capacity in normal use, can meet the requirement for deformation of relatively big corners of a long-span bridge and a long-span spatial structure, effectively reduces the seismic response of a bridge structure under the action of the earthquake, and ensures the anti-seismic safety of the bridge.

The invention discloses a VR-based child earthquake safety education simulation system, which comprises a VR earthquake safety experience museum, a VR experience helmet, a wearable device, a control host and an alarm module, and is characterized in that the control host is used for acquiring control information of an earthquake platform hydraulic control device, judging whether an experiencer complies with the preset earthquake escape rule or not according to the acquired control information of the earthquake platform hydraulic control device, the virtual personnel and the virtual personnel motion information constructed in the VR experience helmet, and an earthquake escape rule preset in a database, and controlling the alarm module to carry out sound-light alarm if it is identified that the experiencer does not comply with the preset earthquake escape rule in the database. The VR-based child earthquake safety education simulation system and method provided by the invention have the advantages that the immersion feeling is strong, and experiencers can feel earthquake escape self-rescue rules more truly and closely, so that the positive participation of people can be attracted, thegoal of improving the training effect is achieved, and the personal casualties in earthquake accidents are reduced.

The present invention belongs to the technical field of nuclear power equipment engineering anti-seismic safety analysis and evaluation, and relates to a nuclear power floor spectrum artificial seismic wave fitting method based on objective wave waveform analysis. The method is characterized by firstly analyzing and selecting an amplitude, a phase angle, a frequency and energy features of a floor spectrum objective wave; obtaining a target spectrum by performing uncertainty manual handling on a response spectrum of the objective wave; calculating a Fourier amplitude spectrum corresponding to the target spectrum; acquiring an initial artificial wave Fourier amplitude spectrum through linear combination of the objective wave and the Fourier amplitude spectrum from the target spectrum; defining an initial artificial wave by a phase spectrum and strength envelopes of the objective wave; and generating multiple groups of artificial waves by using the strength envelopes of the objective wave as controlling conditions during initial artificial wave iterative fitting, linearly dependent coefficients between the above acquired artificial waves and an energy curve and a time travel curve of the objective waves being index optimization floor spectrum artificial seismic waves. With adoption of the fitting method provided by the present invention, the floor spectrum artificial seismic waves have certain waveform features with target floor time-history response, and expression effects and engineering applicability of the floor spectrum artificial seismic waves can be raised.

The invention relates to a three-dimensional vibration isolation structure for a small nuclear reactor. A horizontal vibration isolation support is arranged between a foundation base and a base vibration isolation bottom plate; a tuned mass damper support is arranged between the base vibration isolation bottom plate and a tuned mass damper substructure-inner containment; a nuclear reactor supporting structure is arranged in the tuned mass damper substructure-inner containment; the nuclear reactor supporting structure is arranged on the base vibration isolation bottom plate through a vertical vibration isolation support; vertical overturning prevention members are annularly arranged on the periphery of the nuclear reactor supporting structure and fixedly connected with the base vibration isolation bottom plate; horizontal same-position members are arranged between the vertical overturning prevention members and the nuclear reactor supporting structure; and structure vertical damping members are annularly arranged between the vertical overturning prevention members and the nuclear reactor supporting structure. According to the three-dimensional vibration isolation structure, the structure vertical and horizontal vibration isolation effect is remarkable, anti-seismic robustness is good, the vibration reduction effect is stable, and the anti-seismic safety of the nuclear power plant structure of the small nuclear reactor can be improved significantly.

The invention belongs to the technical field of anti-seismic safety and particularly relates to a multidimensional composite tensile-bearing-type anti-seismic joint device. The multidimensional composite tensile-bearing-type anti-seismic joint device is constituted by a special-shaped steel base, an anchoring component, a spherical cage universal coupling, damping and energy-consumption tensile-bearing rods, a bolt, an aluminum alloy cover plate, a rubber damping pad and rubber strips. The anchoring component and a concrete beam are poured together, so that the special-shaped steel base and the concrete beam are connected into a whole; one end of the aluminum alloy cover plate is connected with the special-shaped steel base through screws, and gaps between the aluminum alloy cover plate and the special-shaped steel base are filled with the rubber strips. The special-shaped steel base and a net-shaped composite damping and energy-consumption unit are connected through the spherical cageuniversal coupling, and the composite damping and energy-consumption unit is constituted by a large quadrilateral structure constituted by the damping and energy-consumption tensile-bearing rods, andthe rubber damping pad arranged in a quadrangle in a filled mode. Multidimensional change of anti-seismic joint deformation can be achieved in the vibrating direction, the material property is sufficiently utilized, the anti-seismic and damping efficiency is improved, and the good composite damping effect is achieved.

The invention discloses a method for damping and energy dissipation of a high-rise housing energy dissipation wall, and a device thereof. The method comprises: firstly, manufacturing a lower energy dissipation wall on a lower layer floor beam of a high-rise housing, manufacturing an upper energy dissipation wall on an upper layer floor beam, pre-embedding built-in fittings in the lower energy dissipation wall and the upper energy dissipation wall, and manufacturing an energy dissipation key which can be connected with the built-in fitting in the lower energy dissipation wall and the built-in fitting in the upper energy dissipation wall between the lower energy dissipation wall and the upper energy dissipation wall. The upper energy dissipation wall and the lower energy dissipation wall transmit energy generated by earthquake to the energy dissipation key in time, so the energy dissipation key rapidly enters a yield situation, and earthquake energy is effectively dissipated in hysteresis, so as to reduce reaction of a main body structure under earthquake action. The method and the device improve earthquake fortification intensity of an ultra high-rise residential building, ensure the building not to collapse under great earthquake action and ensure personnel safety, and effectively protect building structure and indoor interior trim, and improve anti-seismic safety level of the building in design working life, so loss of the building in earthquake is reduced to minimum.

The invention relates to a rotating thin shell type house anti-seismic safety survival device made of thin plates, comprising a sphere, wherein a door is arranged on the sphere; a leg base is connected to the lower part of the sphere; the upper part of the sphere is provided with an impact pressure uniform distributor; the upper part of the impact pressure uniform distributor is provided with a laminated plate spring; and the upper part of the laminated plate spring is provided with a friction shock absorber. After the rotating thin shell type house anti-seismic safety survival device disclosed by the invention is well assembled, the friction shock absorber positioned above the rotating thin shell type house anti-seismic safety survival device tightly supports below a reinforced concrete precast slab of a roof or a beam of a bungalow; when a seism is generated and a wall and a house collapse, impact force caused by the weight of the rotating thin shell type house anti-seismic safety survival device and falling objects of upper floors is firstly born by the friction shock absorber, and after the impact force is greatly reduced through the shock absorption and the buffering of the friction shock absorber, the rest impact force is reduced again through the laminated plate spring; then the remaining impact force is shared by shock absorbing rubber mats positioned among units positioned among component units; meanwhile, the impact pressure uniform distributor uniformly distributes the remaining impact force to arc-shaped bearing plate units.

This invention relates to an intelligent seismic safety machine for household use, which comprises a sensor circuit powered by switching mode stable voltage source including jar testing probe, voice testing probe; a data processing circuit including a jar signal comparing amplifier, a voice signal comparing amplifier; and an alarming circuit linked to output port of microprocessor composed by electric linking combinational logic state processor, jar signal comparing amplifier, a voice signal comparing amplifier. Using this safety machine can avoid danger earlier by alarming signal.

The invention relates to the technical field of anti-seismic safety, in particular to a three-dimensional gear type self-resetting energy dissipation and seismic isolation support. The support comprises an upper limiting plate, an upper rubber layer, an upper support plate, a toothed ellipsoid rotating body, a lower support plate, a lower rubber layer and a lower limiting plate in sequence from top to bottom. The upper support and the lower support are connected through a plurality of shear keys, and rubber sealing rings are arranged on the outer sides of the shear keys. The upper limiting plate is connected with the main beam through studs, and the lower limiting plate is connected with a cover beam through studs. Through the meshing effect of the gears, the ellipsoid with the gear in themiddle shifts under the strong shock effect, meanwhile, the stress area is not changed, stress is uniform, the overturning danger is reduced, the rotating angle of the ellipsoid rotating body is limited through limiting check blocks on the two sides of a gear ring, and the phenomenon that different components are disengaged from one another is effectively avoided.

The invention discloses a liftable double-layer anti-seismic safe bed. The liftable double-layer anti-seismic safe bed is mainly used for protecting a sleeping person when earthquake occurs and comprises a bed frame, a controller, an upper protection structure, a rotatable bed plate structure and a liftable bed plate. A person is dropped into the bed and upper and lower layers are turned over to form a triangular protection bed plate structure so that the bed strength is improved. Most of parts are connected through threads or hinges so that installation and use are convenient. The liftable double-layer anti-seismic safe bed utilizes the principles of the motion dead point and the triangular structure stability so that the whole bed strength is greatly improved. The liftable double-layer anti-seismic safe bed solves the problem that the existing anti-seismic bed is heavy, has poor anti-seismic effects, is mounted through complicated processes and is expected to be promoted and applied.

The invention discloses an anti-seismic characteristic simulation calculation method for improving response spectrum excitation response synthesis, and belongs to the technical field of anti-seismic design and safety performance evaluation analysis. The method comprises the following calculation steps: carrying out response spectrum envelope and interpolation calculation on corresponding damping coefficients under different earthquake dynamic loads; establishing a three-dimensional entity geometric model; setting the node group and the contact surface group; providing load combination and working conditions; performing boundary constraint and load application; performing mesh generation and independence inspection; performing simulation calculation and response synthesis; evaluating evaluation criteria and results; performing joint bolt or weld check. According to the invention, simultaneous excitation response synthesis of three spatial orthogonal components is embodied as simultaneous same-position response combination of any position of the model, so that the maximum structural response is more reasonable, the evaluation of the total calculation result is more conservative, thereserve coefficient and the reliability are higher, green calculation is realized, large-batch anti-seismic characteristic calculation can be quickly and effectively completed, and therefore, a manufacturing supplier can take corresponding improvement or preventive measures in time, and the accuracy of anti-seismic safety performance evaluation is improved.

The invention relates to a rotating thin-shell duplex type house anti-seismic safety survival facility manufactured by thin plates, which comprises two hemispheres arranged at two ends, the two hemispheres are connected into an integral structure through a middle cylinder body, a door is arranged on the middle cylinder body and a ladder is arranged at the lower part of the door; and the lower parts of the two hemispheres are connected with leg seats respectively, distributors for impact pressure uniform distribution are arranged at the upper parts of the two hemispheres, laminated plate springs are arranged at the upper parts of the distributors for impact pressure uniform distribution and friction shock absorbers are arranged at the upper parts of the laminated plate springs. After the rotating thin-shell duplex type house anti-seismic safety survival facility manufactured by the thin plates is well assembled, the friction shock absorbers at the upper part pushes against the lower surface of a reinforced concrete prefabricated plate of a roof or a beam of a one-storey house, when the wall goes down and the house is collapsed during an earthquake, impact force on the house is firstly born by the friction shock absorbers, after shock absorption and cushioning, the impact force is greatly weakened, then the impact force is attenuated by the laminated plate springs, the remainingimpact force is shared by a shock absorption rubber pad between units and the distributors for impact pressure uniform distribution are further used for uniformly distributing the remaining impact force onto the pressure bearing plate units.

The invention relates to a multi-dimensional integrated friction damping tuned mass shock absorption bracket. The shock absorption bracket comprises a cable trough for accommodating a pipeline; transverse load-bearing crossbars are arranged on the lower portion of the cable trough in the length direction of the cable trough at certain intervals; the cable trough is fixedly connected with the transverse load-bearing crossbars through cable trough fixing steel angle; the transverse load-bearing crossbars and a main structure are connected through load-bearing booms, transverse inclined struts and longitudinal inclined struts into a stable structure; two-dimensional tuning shock absorption boxes are arranged in the cable trough in the length direction of the cable trough at certain intervals,transverse horizontal tuning shock absorption boxes are arranged in the transverse load-bearing crossbars, and a multi-dimensional tuning shock absorption system is jointly formed; the two-dimensional tuning shock absorption boxes are used for absorbing and frictionally dissipating the vertical and longitudinal vibration energy; and the transverse horizontal tuning shock absorption boxes absorb and frictionally dissipate transverse vibration energy. The shock absorption bracket has the advantages of being convenient to assemble, efficient in energy dissipating and convenient to normalizing, can be used for newly built seismic brackets, and can also be used for transforming existing seismic brackets, and the seismic safety of electromechanical engineering pipelines is improved.

The invention relates to a self-resetting pressure bearing and shock reducing water stop part and a tunnel flexible connector. The self-resetting pressure bearing and shock reducing water stop part comprises a first water-stop rubber layer, a second water-stop rubber layer, a shape memory alloy plate, a first thickened clamping steel plate, a second thickened clamping steel plate, a third thickened clamping steel plate and a fourth thickened clamping steel plate, wherein the first water-stop rubber layer and the second water-stop rubber layer are oppositely arranged, and the shape memory alloy plate is arranged between the first water-stop rubber layer and the second water-stop rubber layer. The self-resetting pressure bearing and shock reducing water stop part can achieve three functions of deformation resetting under loads, flexible energy dissipation and shock reduction and normal water pressure bearing for sealing and water stopping, damage to a tunnel main body structure by an earthquake can be reduced when the earthquake happens, and the seismic safety of a tunnel structure is improved.

The invention provides an earthquake safety valve and belongs to the field of valves. The earthquake safety valve mainly comprises a fixed frame, a ball valve, a pulling mechanism, a locking mechanism, an unlocking mechanism and an earthquake induction mechanism; the fixed frame is used for fixing other parts to the foundation; the ball valve is provided with a valve rod; the pulling mechanism isused for pulling the valve rod and closing the ball valve; and the locking mechanism is used for locking the pulling mechanism, so that when an earthquake does not occur, the pulling mechanism cannotpull a valve element. When the earthquake occurs, by adopting the gas system of the earthquake safety valve component, a conveying pipeline of the gas system can be automatically cut off, and accidents including explosion caused by leakage of gas are prevented.

The invention relates to the technical field of tunnel engineering, in particular to a shield tunnel structure anti-seismic safety evaluation method based on pattern recognition. The method comprisesthe following steps: a, forming a characteristic space based on shield tunnel anti-seismic analysis theory practice data research and influence factor selection; b, setting a tunnel anti-seismic property requirement grade according to technical specification requirements, selecting a shield tunnel anti-seismic property index and establishing and calculating a shield tunnel anti-seismic safety evaluation result; c, applying shield tunnel seismic response finite element software under the condition of assignment of each type of influence factors, calculating seismic performance index values, determining a tunnel seismic safety evaluation result and constructing a knowledge base of a relation model of the influence factors, the safety evaluation indexes and the safety evaluation result; andd, adopting a mode identification method to obtain a tunnel structure anti-seismic safety evaluation result according to the real-time data of each influence factor in the shield tunnel operation period. The anti-seismic safety evaluation method for the shield tunnel structure is beneficial to improving the accuracy of the evaluation result.

The invention discloses a novel earthquake safety protection escape bed, which comprises a special safety protection vault, a liftable support system, a double-layer bed surface and a storage bed head, a buzzing alarm triggered emergency lighting system, an emergency power supply, a safe lifting control system and a shock absorbing buffer self-balancing table top. The outside of the special safety protection vault is connected to umbrella-shaped four brackets by rivet welding, and buzzing alarm triggered sensors are mounted on the upper parts of the umbrella-shaped four brackets. The liftable support system can realize lifting of the special safety protection vault. The storage bed head is fixed on a stainless steel bed surface. The buzzing alarm triggered emergency lighting system is composed of buzzing alarm triggered sensors and emergency lighting lamps. The power of the emergency power supply and safe lifting control system is an iron lithium battery. The bed provided by the invention has the functions of food storage, lighting and buzzing alarming, and also can provide a certain range of safety protection area. Therefore, the bed provided by the invention is an effective earthquake safety protection escape device, and can be promoted to use in earthquake prevention and the rescue process after earthquake.

The invention discloses a shock isolation and fall prevention device of an ultra-high voltage converter transformer. The shock isolation and fall prevention device comprises a shock isolation support, and a first steel plate and a first thin rubber layer which are arranged horizontally on the shock isolation support at an interval from top to bottom, wherein a center hole is formed in the center of the shock isolation support; a lead core is arranged in the center hole; an upper connection plate and a lower connection plate parallel to each other are also arranged on the device; the upper surface and the lower surface of the shock isolation support are respectively connected with the centers of both the upper connection plate and the lower connection plate; falling prevention gaskets are arranged at the midpoints on four edges of the upper connection plate; and the falling prevention gasket comprises a second thin rubber layer, a second steel plate, a rubber layer and a steel sealing plate which are connected in sequence from top to bottom and are made as an integrated structure by high-temperature and high-pressure vulcanization. The device provided by the invention has the characteristics of falling prevention function and low surface pressure, has the advantages of simple structure, stable performance, relatively low construction cost, convenience in construction and installation, and high economic, environmental and social benefits, and can greatly improve the seismic safety of the ultra-high voltage converter transformer, particularly can ensure the safety of the ultra-high voltage converter transformer under a super earthquake action.

The invention belongs to the field of petroleum and natural gas fracturing transformation, and relates to a step type pulse circulation temporary plugging complex fracture network fracturing method for a deep low-permeability reservoir. The method includes the steps of ground and borehole preparation; perforation; cracking; complex fracture network generation; sand adding; temporary plugging; circulation pulse fracturing and the like. A pulse hydraulic energy generation tool with a bottom seal is matched, and a complex fracture network is formed in the deep reservoir through pulse circulationimpact fracturing, fatigue damage and temporary plugging steering, so that the problem that the complex fracture network is difficult to form in the deep reservoir is solved, the induced microseism amplitude is reduced under the low crack initiation fracturing condition, and the fracturing transformation operation efficiency, effectiveness and earthquake safety are improved. The step type pulse circulation temporary plugging complex fracture network fracturing method for the deep low-permeability reservoir is also suitable for repeated fracturing transformation of the low-permeability reservoir.