19 results about "Seismic zone" patented technology

This invention provides a method and system for detecting exposed rebar in tunnel lining in strong earthquake zones, comprising: constructing a standard rebar structure for the tunnel in a strong earthquake zone according to tunnel construction drawings; determining several rebar sampling locations in the tunnel in a strong earthquake zone; performing image sampling on each of the rebar sampling locations to obtain several regional rebar features in the tunnel in a strong earthquake zone; reconstructing the constructed rebar structure in the tunnel in a strong earthquake zone based on the regional rebar features; identifying structural differences between the constructed rebar structure and the standard rebar structure; determining the exposed rebar defect features of the corresponding rebar sampling locations based on the difference attributes corresponding to each of the structural difference information; generating and displaying an exposed rebar defect report for the tunnel in a strong earthquake zone. This method utilizes the convenience and accuracy of image recognition to improve the quality of exposed rebar identification work and effectively improves worker efficiency.

The invention relates to the field of bridge damping, in particular to a near-fault bridge anti-seismic toughness improving device and a test method thereof.The bridge comprises T-beams, a cover beam, a diaphragm plate between every two adjacent T-beams and an ECC column located between the two T-beams; two pairs of SMA disc spring devices are arranged on the ECC column body, one pair of SMA disc spring devices are arranged towards the T beam, and the other pair of SMA disc spring devices are arranged towards the transverse partition plate; the SMA disc spring devices are used for enabling the T beams to recover to the initial positions through the recovery characteristic of the SMA disc spring devices after relative displacement of the bridge in the transverse bridge direction occurs, and the ECC column is arranged between the two T beams of the bridge, so that the T beams can be recovered to the initial positions. The limit tensile strain of the ECC (fiber cement-based composite material) material can reach more than 200 times that of the traditional concrete, and the ECC material is accompanied by the multi-crack cracking phenomenon of fine cracks, so that the strain hardening characteristic of a similar metal material under the tensile effect is formed, and the structural deformation caused by earthquakes can be effectively dealt with.

The invention provides a fabricated steel structure column base anti-seismic reinforcing device, and relates to the technical field of steel structures, the fabricated steel structure column base anti-seismic reinforcing device comprises a steel column, an upper side column base bottom plate is welded to the bottom end face of the steel column, and a lower side column base bottom plate consistent with the upper side column base bottom plate in structural size is arranged below the upper side column base bottom plate; a double-elastic buffering system is formed through the rubber buffering compensation sleeve and the rubber anti-vibration buffering cushion, the rubber buffering compensation sleeve is in sliding fit with the limiting insertion column, horizontal and vertical vibration energy is absorbed through elastic deformation of the rubber buffering compensation sleeve, and a vibration transmission path is weakened; the rubber anti-seismic cushion further buffers vibration impact force through compression rebound deformation, meanwhile, the vibration amplitude is attenuated by means of the high damping characteristic of rubber materials, the structure resonance risk is effectively reduced, impact caused by medium-high-strength earthquakes can be better resisted, and the service life of the anti-seismic cushion is prolonged. The problems that an existing fabricated steel structure column foot is insufficient in anti-seismic buffering performance, weak in shear resistance and limiting capacity and inconvenient in structural state monitoring are solved.

This invention relates to a lightweight caisson and its construction method suitable for the construction of high-pile foundations for bridges in water. The caisson includes a base plate and side plates installed around the base plate. The base plate is composed of multiple precast blocks, which are connected as a whole by wet-joint concrete pouring. The base plate has multiple inverted arched grooves, each covered by a cover plate. The base plate also has through-holes for steel casings. For each pile foundation construction, a steel casing is inserted into one of these through-holes, and circumferential sealing concrete is poured into the gap between the inner wall of the through-hole and the outer wall of the steel casing. The inverted arched cavity in the base plate of this invention reduces the weight of the base plate without reducing its thickness, thus ensuring sufficient bonding force between the base plate and the steel casing. This effectively enhances the seismic performance of bridges in water in high-intensity seismic zones.

This application provides a method and system for assessing earthquake-induced landslide risk in transportation networks in high-intensity seismic zones, relating to the field of landslide risk assessment technology. The method includes: screening key influencing factors of earthquake-induced landslides; optimizing the construction of positive and negative sample libraries; using a spatial weighted machine learning model to evaluate landslide susceptibility and generate a susceptibility zoning map; extracting parameters of potential landslide source areas based on the high-susceptibility zone identification results; using a parallel particle discrete element method to simulate the entire landslide movement process to obtain hazard parameters; inputting the hazard parameters into a transportation engineering structure vulnerability model to quantitatively calculate the failure probability; and fusing the susceptibility probability and structural vulnerability results to generate a risk zoning map based on road network units. The final results of this application are directly applicable to the operation and maintenance management of transportation infrastructure. The provided risk zoning map can be directly used to guide the optimal allocation of risk control resources, the formulation of emergency plans, and the seismic resilience design of engineering projects, demonstrating clear application value.

The application discloses a method for forming an effective pile diameter vibro-replacement stone pile under an ultra-strong earthquake zone, which comprises the following steps: installing a detection element for detecting a vibroflot deflection parameter on a shock absorber or a guide rod; penetrating a pipeline for supplying water through the vibroflot and extending the pipeline from the bottom end of the vibroflot; controlling the perpendicularity of the vibroflot according to the vibroflot deflection parameter detected by the detection element during the vibroflot construction; when the perpendicularity of the vibroflot reaches a specified perpendicularity range, the vibroflot controls the water flow of the supplied water according to the current stratum compactness to perform a vibroflot hole forming construction; and vibrating the stone filler put into the stone pile to form a vibro-replacement stone pile with an effective pile diameter after the hole forming construction is completed. The method can accelerate the vibroflot construction of the stratum with a depth of more than 50 m and thick overburden according to the stratum condition and the required perpendicularity, and can make the stone pile formed by the vibro-replacement stone filler tightly combined with the soil layer.

This invention belongs to the field of tunnel cavity detection technology, and provides a three-dimensional lidar scanning system for tunnel lining cavities in strong earthquake zones. The system includes: a tunnel contour point cloud data acquisition module for collecting tunnel contour point cloud data; a cooperative positioning data acquisition module for collecting cooperative positioning data; a data fusion module for fusing multi-period tunnel contour point cloud data and cooperative positioning data; a standard tunnel contour model construction module for processing the fused data using radial basis function neural networks and clustering algorithms to establish a standard tunnel contour model; and a lining cavity detection module for identifying and detecting lining cavities based on the standard tunnel contour model and measured tunnel contour point cloud data. This invention enables high-precision and high-efficiency scanning and detection of tunnel lining cavities in strong earthquake zones, improving the accuracy and reliability of detection.

The invention belongs to the technical field of tunnel cavity detection, and provides a tunnel intense seismic zone lining cavity scanning system based on a three-dimensional laser radar, and the system comprises a tunnel contour point cloud data acquisition module which is used for collecting and obtaining tunnel contour point cloud data; the cooperative positioning data acquisition module is used for acquiring cooperative positioning data; the data fusion module is used for carrying out data fusion on the multi-cycle tunnel contour point cloud data and the cooperative positioning data; the standard tunnel contour model building module is used for processing the fusion data by using a radial basis function neural network and a clustering algorithm and building a standard tunnel contour model; and the lining cavity detection module is used for identifying and detecting a lining cavity based on the standard tunnel contour model according to the actually measured tunnel contour point cloud data. According to the invention, high-precision and high-efficiency scanning detection of the tunnel strong seismic zone lining cavity can be realized, and the detection accuracy and reliability are improved.

The application discloses a frame structure, comprising a prefabricated frame, the prefabricated frame comprising frame columns, frame beams, secondary beams and floors; a post-cast rocking frame for making inter-story shear force distribution more uniform is arranged between adjacent prefabricated frames; the post-cast rocking frame comprises rocking columns, coupling beams, infill walls, hidden beams and cast-in-situ floors; energy dissipation devices for improving the seismic resistance of the frame structure are arranged between the frame columns and the coupling beams; base pads are arranged at the bottom of the prefabricated frame; and energy absorption pads for absorbing energy and mitigating impact are further arranged between the base pads and the rocking columns. The application further discloses a construction method of the frame structure, comprising foundation construction, assembling the prefabricated frame, assembling the rocking frame, assembling the coupling beams and the second floors, and assembling the energy dissipation devices. The prefabricated frame and the post-cast rocking frame are arranged to enhance the seismic toughness of the overall structure, and the energy dissipation devices and the energy absorption pads are arranged inside to further mitigate the impact caused by earthquakes; the whole structure is constructed by using the prefabricated method, which is convenient to operate.

The application discloses a method for controlling water permeability of a vibro-replacement stone pile, which comprises the following steps: rapidly completing vibro-replacement construction of a stone pile hole; performing hole cleaning treatment on the stone pile hole, and obtaining mud density in the stone pile hole during the hole cleaning treatment by using a mud pump; controlling water flow and air flow according to the mud density obtained by the mud pump, so that the mud density in the stone pile hole meets the requirements; after the hole cleaning treatment is completed, the stone filling is put into the stone pile hole, and the stone filling in the stone pile hole is subjected to vibro-replacement compaction construction by using a vibrator, so as to form a vibro-replacement stone pile with an effective pile diameter. The method ensures that the water permeability in the stone pile hole meets preset requirements, so that the water permeability of an ultra-deep vibro-replacement stone pile formed under an ultra-deep overburden layer in a super-strong earthquake zone is good, and the vibro-replacement stone pile is safe and stable under strong earthquakes.

The invention discloses a transformer used in a seismic zone tunnel and an anti-seismic simulation method thereof, and belongs to the technical field of transformer simulation detection, and the method comprises the following steps: building a transformer structure simulation model; performing static analysis to obtain the maximum stress of the transformer; the first-order vibration frequency of the transformer is obtained through modal analysis, and the first-order vibration frequency of the transformer is used for representing the lowest frequency vibration characteristic generated by the structure of the transformer due to the material attribute when the transformer has no external excitation; performing response spectrum analysis to obtain equivalent stress distribution and an equivalent stress value of the transformer under the simulated seismic load; performing fatigue analysis based on the equivalent stress value of the transformer, and estimating the fatigue strength of the transformer structure; according to the scheme, the transformer can be arranged in a split mode in a seismic zone tunnel, the anti-seismic performance of the transformer in an earthquake can be evaluated, and the structural safety of the transformer is verified by simulating the seismic load waveform and the vibration response.

This utility model discloses a prefabricated building structure for multi-earthquake zones, including a ground surface, prefabricated wall panels, composite beams, and composite slabs. The ground surface is equipped with connecting steel bars and steel shims. The bottom of each prefabricated wall panel has a first embedding groove and a casting groove at its lower part. The first embedding groove is fitted with the steel shims, and the connecting steel bars are embedded in the casting groove. Load-bearing walls are provided between the prefabricated wall panels. The top of each load-bearing wall panel has an upward-opening second embedding groove. The composite beam is embedded in the second embedding groove, and the composite slab is placed on top of the composite beam. This utility model achieves good stability by vertically placing the prefabricated wall panels on the ground and fixing them with grout, then supporting them with an "L"-shaped vertical frame and telescopic support rods. Load-bearing walls are set between the prefabricated wall panels, and the prefabricated wall panels and load-bearing walls are integrated by casting with second connecting steel bars. The two ends of the composite beam are embedded in the second embedding grooves, and the composite slab is placed on the composite beam to form an integrated structure. Reinforcing steel bars are provided on the top of the slab for easy casting, making it suitable for use in multi-earthquake zones.

The application relates to the technical field of data processing, and discloses a method for reproducing damage characteristics of a bridge component in a seismic zone based on a three-dimensional micro model, which comprises the following steps: collecting point clouds of an undamaged bridge and point clouds of a damaged bridge; marking a first target point and a second target point and determining local radii of the first target point and the second target point, and constructing a KD tree; performing point cloud matching on the point clouds of the undamaged bridge and the point clouds of the damaged bridge, determining a matching point of the second target point, defining a near neighbor point, obtaining a damage point cloud clustering cluster, determining an included angle threshold of points in the damage point cloud clustering cluster, continuing to perform point cloud matching in combination with a point cloud matching process, local radii and the KD tree, and obtaining all unmatched points and an unmatched number of the unmatched points; and reproducing damage characteristics of the bridge component according to the unmatched number of the unmatched points and spatial distribution. The application can improve the accuracy of reproducing damage characteristics of the bridge component.

The application relates to a method for high-resolution P and S wave velocity ratio time series inversion based on seismic wave arrival time, which comprises the following steps: S1, obtaining P wave and S wave arrival time difference data of a seismic pair; S2, performing linear relationship fitting on the P wave and S wave arrival time difference data to extract average wave velocity ratio of the seismic pair; S3, constructing an initial wave velocity ratio time series according to a seismic time of a seismic sequence; S4, constructing a time series inversion matrix and performing inversion solving on the time series inversion matrix to obtain a wave velocity ratio time series; S5, judging whether the wave velocity ratio time series is stable, if the wave velocity ratio time series is stable, then returning to S3 with time series unknown number plus one, and if the wave velocity ratio time series is not stable, then outputting the inverted wave velocity ratio time series. The application can more accurately reveal the dynamic change rule of the wave velocity ratio of a natural seismic zone or an artificial blasting area.

A connecting joint of a constructional column, a ring beam and a frame shear wall structure in a high earthquake area comprises a masonry structure part composed of masonry, a concrete ring beam and a concrete constructional column and a main body structure part composed of a frame beam and a frame column or a shear wall, and a transverse connecting structure is arranged between the concrete ring beam and the frame column or the shear wall. And a vertical connecting structure is arranged between the concrete constructional column and the frame beam. The transverse connecting structure comprises a transverse steel bar, one end of the transverse steel bar is embedded in the frame column or the shear wall, a transverse PVC sleeve is arranged in the concrete ring beam, and the other end of the transverse steel bar is inserted and embedded in the PVC sleeve. The vertical connecting structure comprises a vertical steel bar, one end of the vertical steel bar is embedded in the frame beam, a vertical PVC sleeve is arranged in the concrete constructional column, and the other end of the vertical steel bar is inserted into the vertical PVC sleeve embedded in the concrete constructional column.

This invention provides a UHPC (Ultra-High-Pressure Polymer) steel truss hollow composite beam and its construction method. By employing the upper and lower flanges as the main components bearing axial compressive and tensile forces, respectively, this invention fully utilizes the ultra-high compressive strength and excellent durability of UHPC. Simultaneously, steel web members, composed of gusset plates and web members, are set between the upper and lower flanges, with the upper and lower gusset plates staggered in horizontal projection. Adjacent gusset plates are connected obliquely by web members, forming a hollow steel truss system. The complex shear force borne by the web is effectively converted into axial tensile and compressive forces in the web members of the steel web members, thereby releasing the tensile and compressive strength of the steel and achieving precise matching and efficient synergy of material properties. This invention significantly reduces the self-weight of the main beam, lowers the load on the substructure and foundation costs, eliminates the risk of web cracking, and improves structural durability. Moreover, each component can be prefabricated in the factory and assembled on-site, resulting in fast construction speed and controllable quality, making it suitable for bridges in large-span, high-intensity seismic zones.

The application discloses a construction method of super-deep vibro-replacement stone pile under super-deep overburden layer in super-strong earthquake zone, which comprises the following steps: installing a first detection element for detecting the deflection parameter of a mast in the mast; installing a second detection element for detecting the deflection parameter of a vibrator on the damper; when the vibrator is used to vibrate the stratum, whether the perpendicularity of the vibrator meets the requirements is analyzed according to the detected deflection parameters of the mast and the vibrator; if the perpendicularity of the vibrator does not meet the requirements, the reason for the deflection of the vibrator is analyzed, and the mast and / or the vibrator are controlled according to the analysis result, so that the vibrator vibrates at the required perpendicularity to form a vibro-replacement stone pile with an effective pile diameter. According to the method, the vibrator can accelerate the vibration construction of the stratum with a depth of more than 50 m under the thick overburden layer according to the stratum condition and the required perpendicularity, and the stone pile formed by the vibro-replacement stone filling is tightly combined with the soil layer.

The invention relates to the technical field of data processing, and provides a seismic zone bridge member damage characteristic reproduction method based on a three-dimensional mesoscopic model, and the method comprises the steps: collecting an undamaged bridge point cloud and a damaged bridge point cloud; marking a first target point and a second target point, determining local radiuses of the first target point and the second target point, and constructing a KD tree; performing point cloud matching on the non-damaged bridge point cloud and the damaged bridge point cloud, determining a matching point of a second target point and defining a neighbor point, obtaining a damaged point cloud cluster, determining an included angle threshold value of points in the damaged point cloud cluster, combining a point cloud matching process, a local radius and a KD tree, continuing point cloud matching, and obtaining a point cloud matching result; obtaining all unmatched points and unmatched times of the unmatched points; and according to the non-matching times and the spatial distribution of the non-matching points, realizing reproduction of the damage characteristics of the bridge member. According to the invention, the accuracy of bridge member damage feature reproduction can be improved.

The application discloses a material surface measuring method for construction of a super-strong earthquake zone super-deep overburden vibro-replacement stone pile machine, and comprises the following steps: before putting stone fillers into a stone pile hole, detecting the initial material surface height of the stone pile hole by means of electric wave; after obtaining the initial material surface height, putting the stone fillers into the stone pile hole to form a loose pile body, and detecting the loose pile body material surface height by means of electric wave; and determining the height of the loose pile body in the stone pile hole according to the loose pile body material surface height and the initial material surface height, so as to calculate the pile diameter of a stone pile section formed by vibration and compaction of the loose pile body by a vibrator. The method can quickly and accurately measure the material surface height before and after vibration and compaction construction in the stone pile hole, so that the vibration and compaction construction of the super-strong earthquake zone super-deep overburden stratum can be smoothly carried out, the failure rate is reduced, and the safety of the vibration and compaction stone pile under strong earthquake is ensured.