57 results about "Active fault zone" patented technology

The invention discloses a diastrophic stratum deformation analysis and calculation method for an active fault zone, and relates to the technical field of geological engineering calculation, and the method comprises the following steps: (1) constructing a three-field dynamic coupling model based on an energy density gradient, and unifying dimensions of physical parameters of a mechanical field, a seepage field and a temperature field as an energy density function; according to the diastrophic stratum deformation analysis and calculation method for the active fault zone, the problems of multi-physical field splitting and time scale solidification in a traditional method are solved by constructing an energy-mediated multi-field dynamic coupling model and a space-time decoupling algorithm. On the basis of an interaction path of energy density gradient tensor unified mechanics, seepage and temperature fields, instantaneous bidirectional feedback of three-field parameters is achieved, compared with a traditional model, the pore pressure prediction error is reduced, and the calculation efficiency is improved; and meanwhile, the joint simulation efficiency of the second-level seismic event and the ten-thousand-year tectonic motion is improved, the interface parameter continuity error is controlled, and the precision and stability of cross-scale modeling are improved.

The invention discloses a landslide risk and risk evaluation method suitable for a tectonic active area, and belongs to the field of geological disaster risk evaluation, and the risk evaluation method is characterized in that risk evaluation is superposed with vulnerability evaluation. The risk evaluation method comprises the following steps: calculating a deterministic coefficient value of each evaluation factor, and weighting to a grid layer of each evaluation factor to generate a deterministic coefficient grid layer of the evaluation factor; importing the deterministic coefficient layer into a logistic regression model, and generating a landslide risk evaluation result based on a logistic regression-deterministic coefficient coupling model; the vulnerability evaluation method is an analytic hierarchy process. By coupling a deterministic coefficient model and a logistic regression model, a linear relationship of multiple evaluation factors is effectively processed, and nonlinear contribution of a single evaluation factor to landslide development is captured, so that the landslide risk evaluation precision of a geological environment complex region and a structure active region is improved; and the evaluation result can more objectively and truly reflect the landslide risk of the active fault zone and the nearby area.

The invention discloses a stochastic finite fault source model establishment method, which comprises the following steps of S1, determining a geometrical shape of a seismic fault based on regional geological data and seismic monitoring data, and estimating a non-planar fault parameter and a fault plane average sliding amount in combination with historical data and an empirical formula; s2, estimating distribution and sliding strength of concave-convex bodies and obstacles on the fault surface according to historical seismic inversion data, and obtaining the sliding amount of each sub-fault by randomly disturbing the average sliding amount; s3, the discrete fault plane serves as a sub-fault unit, and after an initial fracture point and the average fracture speed are determined, random fracture initial time conforming to normal or power law distribution is generated based on a random number method; s4, calculating the seismic oscillation time history of each sub-fault by adopting a random point source method, superposing contributions, introducing the influence of a shallow velocity structure V30, and generating a three-dimensional seismic oscillation field; and S5, comparing actual strong earthquake record adjustment parameters, and outputting a multi-risk-level earthquake motion parameter evaluation result after iterative optimization. According to the method, by fusing randomness and empirical data, the simulation precision of the seismic source model on the uncertainty of the seismic process is improved, the influence of the potential maximum-magnitude earthquake possibly occurring in the active fault zone in the future can be effectively estimated, the seismic oscillation simulation precision and the calculation efficiency can be improved, and the method is suitable for engineering structure aseismic design and seismic disaster evaluation.

The invention discloses a catastrophe early warning system for a tunnel passing through an active fault zone, and relates to the technical field of tunnel early warning, the system comprises a multi-mode sensing layer used for obtaining micro-seismic wave, vibration, inclination and strain data along the tunnel fault zone, the multi-mode sensing layer comprises an optical fiber distributed sound wave sensing unit DAS, a data processing unit DAS and a data processing unit DAS, the optical fibers are arranged along the inner side of the tunnel lining at intervals of 10m and are used for monitoring tiny sound wave signals of a fracture surface in real time; the MEMS accelerometer arrays are arranged at four corners of each section and are used for detecting high-frequency vibration; gNSS and INS combined inclination strain sensors which are installed on the top plate and the side wall of the tunnel and are used for obtaining millimeter-level inclination and strain changes; and the acoustic cavity sensor is arranged in a near area of the sliding surface of the fault zone and is used for capturing an air sound wave precursor signal. According to the invention, through multi-mode fusion sensing, the function of capturing fracture micro-shock, vibration and deformation in all directions is realized, the problem of missed alarm and false alarm of single sensing is solved, the sensitivity order of magnitude is improved, and the false alarm rate is reduced.

The invention relates to a method for simulating a complex earthquake load in a triaxial test, and belongs to the field of geotechnical engineering indoor test methods. The invention mainly overcomes the defects in the prior art, and provides a simulation method for complex earthquake load in a triaxial test, which comprises the following steps: acquiring a near-field strong earthquake record, and carrying out baseline correction and filtering processing on the near-field strong earthquake record; decomposing and synthesizing the near-field strong earthquake record; performing time-history conversion on the near-field strong earthquake record, and determining experimental parameters; preparing a soil-rock mixture sample, and saturating the sample; performing an indoor triaxial test on the saturated sample according to the determined experimental parameters; calculating the correlation between the input waveform and the output waveform according to the test result; and analyzing typical dynamic characteristics of the soil-rock aggregate under the action of the near-field strong earthquake according to a test result. The invention provides a method for analyzing test data under the action of earthquake load, and provides an indoor triaxial test method for carrying out research on dynamic characteristics of a rock-soil body by near-field strong shock of an active fault zone.

The invention relates to the technical field of railway foundation deformation, and discloses a number and object fusion method for railway foundation deformation analysis under fault zone dislocation, which comprises the following steps: establishing a physical experiment platform, a simulation model and a fault zone spatial dislocation deformation statistical model, and obtaining boundary conditions; loading boundary conditions on the physical experiment platform and the simulation model to obtain space deformation of the tunnel structure; and comparing the space deformation of the tunnel structure under the physical experiment condition with the space deformation of the tunnel structure under the analogue simulation condition, and outputting a displacement curve of the tunnel inverted arch in the fault dislocation direction after the conditions are met. According to the method, an active fault zone-tunnel structure physical experiment platform and a simulation model are effectively combined, simulation model parameters are guided and corrected through physical experiment results, the fault zone-tunnel structure system deformation evolution and the space-time law thereof are accurately analyzed, the types of working conditions capable of being simulated are rich, and the simulation efficiency is high. And the method is suitable for the pre-research requirements of railway construction in the western fault zone frequently-occurring areas, and has relatively high accuracy and robustness.

The invention discloses a TBM (Tunnel Boring Machine) tunneling and supporting method under an active fault zone. The technical problem that TBM tunneling construction under the active fault zone is extremely easy to cause machine jamming due to deformation of tunnel surrounding rock is mainly solved. And the advanced pipe shed and the advanced consolidation grouting are matched with each other, so that the self-stabilization capability of the surrounding rock is improved, deformation and collapse in the excavation process are reduced, the purpose of reliable supporting is finally achieved, and the tunnel construction safety is guaranteed. Meanwhile, the box type arch frame and sprayed concrete form a steel-concrete combination, so that the bearing capacity and the durability can be obviously improved; meanwhile, anchor cable hole channels are reserved and directly connected with pre-stressed anchor cables, an arch frame-anchor cable combined supporting system is further formed, and the supporting reliability is guaranteed. In addition, the pre-stressed anchor cables arranged at the side top arches and the self-propelled hollow grouting anchor rods arranged at the bottom arches can effectively support the side top arches and the bottom arches according to different stress characteristics and geological conditions, and the stability and safety of the whole tunnel or underground engineering are effectively improved.

The invention provides a dynamic response holographic sensing method and system for a railway tunnel crossing an active fault zone, and relates to the technical field of tunnel safety. The monitoring data of the multiple dimensions comprises first dimension data obtained through monitoring based on a touch sensor, second dimension data obtained through monitoring based on a visual sensor, and third dimension data obtained through monitoring based on an auditory sensor; determining limit thresholds of tunnel damage level intervals to which the first dimension data, the second dimension data and the third dimension data belong respectively; corresponding weights are given to the determined multiple limit thresholds respectively, summation calculation is carried out on the multiple limit thresholds based on the weights, and a safety state index of the tunnel is obtained; and determining whether the tunnel is in a safe state based on the safe state index of the tunnel. The problem that the accuracy is not high when the tunnel safety state is determined is solved.

The invention discloses a method and a system for sensing catastrophe risks of an active fault zone by integrating long-distance pipeline accompanying monitoring, pipe measurement, storage and calculation, and relates to the technical field of safety monitoring of long-distance pipelines. A polymer measuring pipe is laid along with a long-distance pipeline, the surface of the polymer measuring pipe is covered with a flexible conductive film, and distributed vibration optical cables are distributed in a guide groove to collect resistivity signals and acoustic vibration signals respectively. The distributed optical fiber acoustic sensing demodulation module is used for processing acoustic vibration signals, the resistivity dynamic data sensing demodulation module is used for processing resistivity signals, and the processed signals are uploaded through the wireless communication module. An RRAM storage and calculation integrated framework is adopted in the intelligent early warning module, acoustic vibration feature extraction and resistance-strain conversion calculation are completed, double signals are fused to monitor the displacement rate of the active fault in real time, and early warning is issued in the case of supercritical quantity. According to the invention, the displacement rate of the active fault is monitored and early warned in real time, and the early warning signal is issued when the displacement rate is supercritical, so that the safe operation of the long-distance pipeline is ensured.

The present invention relates to the field of tunnel safety technology, and is a tunnel segment joint structure and installation method suitable for active fault zones, wherein the structure includes a plurality of bow-shaped steel end templates symmetrically distributed in pairs between the front and rear secondary lining segments in the tunnel; the upper horizontal wing plates of the front and rear bow-shaped steel end templates are fixedly connected by a waterproof device; the waist grooves are connected by a high-strength spring; the lower horizontal wing plates are fixedly connected by a W-shaped waterstop; the front and rear bow-shaped steel end templates, the bottom casting template, the top initial support, and the front and two secondary lining stages are enclosed to form a post-casting strip, and the bottom casting template is provided with a casting hole. This scheme is suitable for joint construction with any cross-sectional shape. It is adaptable to various fault displacement situations in different directions. Even if a large deformation occurs, the inner W-shaped waterstop can adapt to its deformation, has good waterproof ability, and can be replaced.

The invention discloses a self-adaptive fault-fault-resistant regulation and control system for a tunnel / hole passing through an active fault zone, and relates to the technical field of design, construction and operation of tunnel / hole engineering. The system comprises a plurality of sections of linings which are connected in sequence, and further comprises a self-adaptive fault-resistant track system, and the self-adaptive fault-resistant track system comprises a plurality of groups of vertical adjusting systems; each set of vertical adjusting system comprises two vertical monitoring oil cylinders located in one section of lining and two vertical adjusting oil cylinders located in the next section of lining. Displacement generated by dislocation is accurately monitored through the oil cylinder, then the displacement is transmitted to the adjusting oil cylinder in a hydraulic mode, and the adjusting oil cylinder acts on the gear and the lead screw to generate real-time equivalent compensation displacement; accurate self-adaptive fault-resistant and error-resistant adjustment is realized. The invention further relates to a self-adaptive fault-resistant method of the self-adaptive fault-resistant regulation and control system for the tunnel / hole passing through the active fault zone.

The present application relates to a kind of railway widening roadbed through active fault method and system, belong to traffic engineering technical field, the method utilizes active fault rotation direction, average annual horizontal sliding rate and its included angle with the direction of railway line as parameter, calculates the displacement amount along the vertical line direction within the design annual use limit of railway, multiplied by design safety factor, obtains roadbed design widening value.The present application provides control basis for the determination of roadbed widening value when railway passes through active fault zone in the form of roadbed, guarantees the economy and safety of railway operation.

The application provides an anti-seismic structure of a seismic activity fault zone on a shield segment surface, comprising a plurality of shield segments located in the seismic activity fault zone, a plurality of prestressed steel bars arranged on the inner surface of the shield segments, each of the prestressed steel bars extending along the length direction of the shield tunnel, and both ends of each of the prestressed steel bars being fixed on the shield segment along the length direction of the shield tunnel. The application also provides an implementation method of the anti-seismic structure of the seismic activity fault zone on the shield segment surface. The prestressed steel bars are arranged on the inner side of the shield tunnel segment to form a prestressed steel bar ring, the longitudinal connection of the segment ring in the activity fault section is strengthened, the friction between the segment rings is increased, the longitudinal overall rigidity of the segment ring in the activity fault section is improved, the impact force generated by the fault dislocation under the strong earthquake action can be effectively resisted, and the overall anti-seismic capacity of the shield tunnel is improved.

The present invention provides a multi-stage seismic isolation structure for a tunnel crossing an active fault zone. A portal seismic isolation structure and a tunnel body fracture zone seismic isolation structure are sequentially arranged in the tunnel longitudinal direction. The portal seismic isolation structure and the tunnel body fracture zone seismic isolation structure each include multiple sub-structures. Each sub-structure adopts a multi-stage seismic isolation layer design on the tunnel cross section. The portal seismic isolation structure includes a portal extension sub-structure, a portal shallow buried sub-structure, and a portal impact sub-structure. The tunnel body fracture zone seismic isolation structure includes a tunnel body impact sub-structure, a tunnel body transition sub-structure, and a tunnel body core sub-structure. Based on seismic isolation and shock absorption design concepts such as over-excavation design, articulated design, and isolation and energy dissipation design, the present invention implements a multi-stage seismic isolation structure design for the tunnel portal and the tunnel body passing through the fault fracture zone, which can effectively prevent the impact of earthquakes on the tunnel.

In order to solve the problems existing in the prior art, the active fault-passing water conveyance tunnel anti-dislocation lining structure and the design method are provided, high-toughness fiber concrete lining sections and common concrete lining sections which are arranged at intervals are arranged in a lining structure area of an active fault zone and used for absorbing shear deformation, and therefore the anti-dislocation lining structure of the active fault-passing water conveyance tunnel is formed. The toughness of the structure is improved; meanwhile, non-shearing seam crossing steel bars are adopted and penetrate through the high-toughness fiber concrete lining section and the common concrete lining section, so that the rigidity and integrity of the structure are guaranteed, and it is guaranteed that the rigidity of the structure meets the design requirement while shear energy is dissipated; the problems of shear failure and violent cross section deformation of the water conveyance tunnel lining passing through the active fault are solved, and the method has wide application prospects.

The invention discloses an underground pressure pipeline penetrating through an active fault zone, relates to the field of underground pressure pipelines of hydropower stations, and solves the safety problem of the pressure pipeline when meter-scale dislocation happens to stratums on the two sides of the active fault zone. A lining is arranged on the outer side of the pressure pipeline, the middle of the lining is located in the fracture zone, the pipe diameter of the lining is gradually reduced from the middle to the two ends, the two ends of the lining are fixedly connected with the pressure pipeline, and a buffer cavity is formed between the lining and the pressure pipeline to provide sufficient deformation space for deformation of the pressure pipeline. And the pressure pipeline can adapt to meter-scale staggered floor displacement of stratums on the two sides of the fault zone. The buffering cavity is formed in the pressure pipeline, the yieldable supporting rod is arranged in the buffering cavity, the yieldable supporting rod elastically restrains the pressure pipeline, when stratums on the two sides of the fault zone are dislocated, the yieldable supporting rod yields, deformation of the pressure pipeline in the buffering cavity is prevented from being limited, and safety of the pressure pipeline is guaranteed.

The invention discloses an anti-dislocation water conservancy tunnel crossing an active fault zone, the water conservancy tunnel comprises a tunnel body, the tunnel body is provided with a main channel, and the tunnel body is sequentially provided with a first steel pipe structure crossing the fault zone and second steel pipe structures arranged at the two ends of the first steel pipe structure in the axial direction; the first steel pipe structure is spaced from the inner wall of the main channel, the second steel pipe structure is fixedly connected with the inner wall of the main channel, the first steel pipe structure and the second steel pipe structure jointly define an overflowing channel, and a sliding connection structure is arranged between the first steel pipe structure and the inner wall of the main channel. The sliding connection structure is used for making the first steel pipe structure slide at least in the radial direction of the main channel. According to the water conservancy tunnel, when radial dislocation happens to the active fault, relative displacement of geologic bodies on the two sides of the fault zone can be transmitted to the tunnel body, and at the moment, the first steel pipe structure can adaptively slide relative to the main channel in the radial direction through the sliding connection structure to adapt to the radial dislocation of the active fault.

The application discloses a kind of TBM tunnel comprising multiple prefabricated structures under active fracture zone and construction method, belong to tunnel engineering field, to solve the problem of poor damping effect, low construction efficiency and drainage difficulty when existing TBM tunnel passes through active fracture zone. The structure adopts "rigid skeleton + flexible damping + integrated drainage" composite design, mainly including primary support, reinforced concrete mouth piece, foam concrete damping layer and reinforced concrete secondary lining. The primary support forms a closed loop by "steel skeleton + shotcrete"; the prefabricated reinforced concrete mouth piece integrates support leg, longitudinal drainage ditch and rapid bearing layer; the foam concrete damping layer has a three-dimensional drainage network built in, which is connected with the mouth piece drainage ditch; the reinforced concrete secondary lining uses impermeable concrete and eliminates cavities by grouting. Through rigid-flexible collaborative damping, prefabricated component rapid construction and three-dimensional drainage system, the structure can effectively improve the seismic performance, construction efficiency and drainage capacity of the tunnel, and is suitable for water-rich active fracture zone tunnel engineering.

The application discloses an oil and gas pipeline drill-and-blast tunnel crossing active fault zone connecting structure and belongs to the technical field of oil and gas transmission. The connecting structure comprises an initial support structure and a secondary lining structure arranged from outside to inside along the radial direction of the tunnel. The secondary lining structure comprises a plurality of segment lining structures distributed along the axial direction of the tunnel, and adjacent two segment lining structures are connected through a flexible joint. The segment lining structure comprises an integrally-formed main body part and a connecting part. The connecting part is located at the end of the main body part, and the size of the connecting part in the radial direction of the tunnel is smaller than the size of the main body part in the radial direction of the tunnel. The flexible joint comprises two fixed parts, a first waterproof structure, a second waterproof structure and an elastic deformation structure. A third waterproof structure is further arranged between the initial support structure and the secondary lining structure. The application can greatly improve the anti-disconnection capacity of the tunnel structure under the action of strong earthquakes and fault dislocation on the premise of ensuring good waterproof performance, and is favorable for guaranteeing the safe operation of the oil and gas pipeline in the tunnel.

The invention discloses an active fault zone TBM tunneling and duct piece stress characteristic experimental device and method, and relates to the technical field of tunnel engineering.The active fault zone TBM tunneling and duct piece stress characteristic experimental device comprises a fault model loading system, a TBM tunneling system and a TBM supporting system; the top loading plate and the bottom loading plate are arranged in a central symmetry mode with respect to the axial direction of the excavation centroid, and when the fault trend is perpendicular to the tunneling direction of the TBM tunneling system, the top loading plate and the bottom loading plate are arranged in a central symmetry mode with respect to the radial direction of the excavation centroid. Grouping oil cylinders respectively act on the top loading plate and the bottom loading plate, so that prefabrication of faults with different dip angles in a cross section or a longitudinal section in a fault model loading system is realized; the TBM supporting system is used for supporting the circular excavation boundary after the TBM tunneling system completes tunneling in the fault model loading system; according to the method, scientific support can be provided for TBM rapid tunneling and machine jamming early warning and forecasting of fault fracture zones and active fault zones.

The invention provides an active fracture cascade dislocation field simulation method and system, and relates to the technical field of geomechanical tests, and the method comprises the steps: building a fracture triggering time sequence prediction model based on a fracture mechanics theory and an energy release principle; constructing an inter-fracture stress transfer function based on the physical information of the fracture zone; predicting fracture triggering time based on the fracture triggering time sequence prediction model, simulating stress transfer between fractures and updating a stress field; calculating mechanical energy generated by the dislocation, constructing a quantitative model for converting the mechanical energy into chemical energy, predicting a chemical product generation condition based on the quantitative model, and updating physical information of the fault zone according to the chemical product generation condition; and performing cascade dislocation simulation based on the updated physical information of the fault zone and the updated stress field to obtain a simulation result. By establishing a complete theoretical framework and mathematical model, high-precision simulation of cascade dislocation of multiple secondary fractures in an active fault zone under the action of strong shock or tectonic stress is realized.

The invention discloses a tilt-slip fracture dislocation non-uniform deformation regulation and control structure which comprises a high-strength earthwork standard room and a track structure jacking system. The high-strength earthwork standard rooms are vertically laid in a full-section mode at fixed intervals from the position below the top face of the foundation bed bottom layer; the track structure jacking system is composed of a jacking device, a hydraulic jacking system, a jacking servo control system and a displacement and pressure sensor, and the jacking device is arranged under a sleeper, buried in a ballast bed and used for adjusting the track structure form in real time. The invention further discloses a regulation and control method, total station measurement robots or laser sensors are arranged on the two sides of the roadbed crossing the active fault zone so as to monitor the linear change condition of the track under fault zone dislocation in real time, monitoring data are transmitted to the jacking servo control system in real time, the jacking servo control system controls the hydraulic jacking system, then the jacking device is controlled, and the hydraulic jacking system is controlled to control the jacking device. And in cooperation with a pressure and displacement sensor in the jacking device, instant feedback of a track line shape adjusting result and accurate regulation and control of the track line shape under fracture zone creeping and stick-slip dislocation are achieved.

The invention discloses a TBM tunnel comprising multiple prefabricated structures under an active fault zone and a construction method, belongs to the field of tunnel engineering, and aims to solve the problems that when an existing TBM tunnel passes through the active fault zone, the damping effect is poor, the construction efficiency is low, and drainage is difficult. The structure adopts a composite design of'rigid framework + flexible shock absorption + integrated drainage ', and mainly comprises a primary support, a reinforced concrete opening part, a foam concrete shock absorption layer and a reinforced concrete secondary lining. The primary support forms a closed ring through a profile steel framework and sprayed concrete; the prefabricated reinforced concrete opening piece is integrated with supporting legs, a longitudinal drainage ditch and a rapid bearing layer; a three-dimensional drainage network is arranged in the foam concrete damping layer and is communicated with the opening piece drainage ditch; the reinforced concrete second lining is made of impervious concrete, and cavities are eliminated through grouting. Through rigid-flexible cooperative damping, quick construction of prefabricated parts and a three-dimensional drainage system, the structure can effectively improve the anti-seismic performance, construction efficiency and drainage capacity of the tunnel, and is suitable for water-rich active fault zone tunnel engineering.

The invention provides a functional gradient reinforcement effect evaluation method for surrounding rock of a deep-buried tunnel penetrating through an active fault zone, and belongs to the technical field of surrounding rock of a deep-buried railway tunnel. According to the method, the bearing effect of a shallow reinforcing area and the pressure regulating effect of a deep reinforcing area are exerted, stress distribution in the whole area of surrounding rock is actively regulated and controlled, the self-bearing characteristic of the surrounding rock is improved, and then through fusion of an elastic-plastic mechanical analysis analytical solution and a numerical solution of the tunnel engineering surrounding rock, rapid calculation of an elastic-plastic stress field of a surrounding rock primary rock area, a functional gradient reinforcing area and a loose circle is achieved. And finally, based on stress regulation and control, energy regulation and control and loose circle regulation and control effects brought by grouting reinforcement, quantitative evaluation of the functional gradient reinforcement effect of the deep tunnel penetrating through the active fault zone is achieved. Grouting reinforcement is used as an engineering disaster prevention and control means, and a rapid evaluation method is provided for gradient reinforcement and stress control optimization design of the deep tunnel surrounding rock.

The invention relates to the technical field of fault tunnel dislocation resistance, in particular to a dynamic phase change dislocation-resistant structural system for a tunnel in an active fault zone. The structural system comprises a plurality of prefabricated pipe joints which are arranged in parallel; the multiple hydraulic supports are evenly arranged on the periphery of each prefabricated pipe joint, one end of each hydraulic support is arranged on the corresponding prefabricated pipe joint, and the other end of each hydraulic support makes contact with the surrounding rock of the expanding excavation section; a plurality of grouting holes are formed in each prefabricated pipe joint; the phase-change material is injected between the prefabricated pipe joint and the surrounding rock of the expanding excavation section through the grouting hole; the phase change material comprises graded gravel, clay minerals, a gelling agent and pore water; and the multiple vibration exciters are evenly distributed on the inner side of the prefabricated pipe joint and used for applying resonance loads to the phase-change material, so that the phase-change material is in a low-shear-impedance fluid form. The structural system can remarkably reduce the fault dislocation energy transfer efficiency, and the prefabricated pipe joints are prevented from being damaged by fault dislocation energy as much as possible.

The present application relates to the technical field of underground tunnel engineering, and discloses a numerical simulation method for tunnel crossing active fault based on discrete element-finite difference coupling, which solves the problem that the existing numerical simulation method for tunnel crossing active fault cannot consider the simulation and calculation efficiency of the real block geometry of the rock mass in the active fault zone. The present application first generates an active fault block model conforming to the statistical distribution law of engineering practice by using Neper software, then imports it into 3DEC software and completes the whole process of modeling, mesh division, parameter assignment, excavation and support simulation and active fault creep / sliding movement simulation in the software, avoiding the cross-software data transmission of the traditional coupling method; at the same time, through fine block design, mesh division, contact setting and constitutive model matching, the real geology and mechanical properties of the rock mass in the active fault zone are fully restored, and high-precision simulation of the numerical simulation of the tunnel crossing the active fault is realized under the premise of considering the calculation efficiency.

The utility model discloses a movable fault zone staggered distribution simulation experiment device, relates to the technical field of experiment equipment, and aims to solve the technical problem that an experiment box on the movable fault zone staggered distribution simulation experiment device cannot be inclined at multiple angles, the movable fault zone staggered distribution simulation experiment device comprises a supporting frame, and the top of the supporting frame is provided with the experiment box; a first motor is fixedly connected to the bottom of the supporting frame, and an inclination mechanism is arranged on the top of the supporting frame. According to the utility model, the inclined disc is inclined through the electric push rod, the transmission rod is driven to rotate through the first motor, so that the experiment box can be inclined in multiple directions, the second transmission rod rotates in one direction through meshed connection of the ratchets and the pawls, two operation modes of a static inclined state and a moving inclined state are realized, and through a one-way structure, the inclined disc can be inclined in multiple directions. The first transmission rod drives the knocking plate to rotate to be in contact with the knocking hammer, then the earthquake simulation effect is achieved, and the experiment range of the device is widened, and the stability of the device during operation is improved.

The invention discloses a self-adaptive fault-fault-resistant regulation and control test device for a tunnel / hole across an active fault zone, and relates to the technical field of tunnel / hole engineering design, construction and operation. The device sequentially comprises a base, a vertical motion simulation device and a self-adaptive anti-break track system from bottom to top, the self-adaptive anti-breakage and anti-dislocation track system comprises vertical adjusting systems, and each vertical adjusting system comprises two vertical monitoring oil cylinders located in one section of lining and two vertical adjusting oil cylinders located in the next section of lining. Displacement generated by dislocation is accurately monitored through the oil cylinder, then the displacement is transmitted to the adjusting oil cylinder in a hydraulic mode, and the adjusting oil cylinder acts on the gear and the lead screw to generate real-time equivalent compensation displacement; accurate self-adaptive fault-resistant and error-resistant adjustment is realized. The invention further relates to a using method of the active fault zone crossing tunnel / hole self-adaptive fault-fault-resistant regulation and control test device.

The invention relates to the technical field of seismic engineering, and discloses a broadband seismic oscillation artificial synthesis method for cross-fault linear engineering, which is suitable for seismic oscillation input and anti-seismic performance evaluation of linear engineering such as bridges, tunnels, highways and railways which pass through active fault zones. According to the method, based on a set earthquake scene, a high-frequency non-stationary seismic oscillation component, a permanent displacement component related to a sliding impulse effect and a speed pulse component related to a directional effect are simulated respectively, and broadband seismic oscillation with high and low frequency coupling, spatial coherence and inconsistent input characteristics is constructed through frequency domain synthesis. The method not only can accurately reproduce the specific permanent displacement and directional speed pulse characteristics of near-fault seismic oscillation, but also can effectively describe the non-consistency difference of the seismic oscillation on the two sides of the fault in the aspects of amplitude, frequency and response mode, and the non-consistency difference is represented as the difference of the reverse symmetric displacement of the strike-slip fault and the displacement of the upper and lower walls of the tilt-slip fault.

The present application relates to a kind of simulation method of complex seismic load in triaxial test, belong to the field of geotechnical engineering laboratory test method.The present application is mainly to overcome the deficiencies in the prior art, propose a kind of simulation method of complex seismic load in triaxial test, including obtaining near-field strong motion record, and baseline correction and filtering processing are carried out to near-field strong motion record;Near-field strong motion record is decomposed and synthesized;Time history conversion is carried out to near-field strong motion record, and experimental parameter is determined;Prepare soil-rock mixture sample, and carry out sample saturation;According to the determined experimental parameter, indoor triaxial test is carried out to saturated sample;According to the test result, the correlation between input waveform and output waveform is calculated;According to the test result, the typical dynamic characteristics of soil-rock mixture under the action of near-field strong earthquake are analyzed.The present application proposes a test data analysis method under the action of seismic load, provides a kind of indoor triaxial test method for carrying out the study on the dynamic characteristics of rock-soil mass under the action of near-field strong earthquake in active fault zone.