134 results about "Soil stress" patented technology

The invention relates to the technical field of data processing, and discloses a soil pressure analysis method and system for a subway double-side extension foundation pit enclosure structure, and the method comprises the steps: carrying out the multi-point soil pressure monitoring of the periphery of extension deep foundation pits at two sides of a subway station, and obtaining the original soil stress data; performing process defect influence elimination and geological condition correction on the original soil stress data to obtain corrected soil pressure distribution data, and performing space-time coupling analysis to obtain soil pressure evolution characteristics; performing characteristic analysis and support parameter optimization on the soil pressure evolution characteristics to obtain a soil pressure prediction result in the dynamic construction process; performing normal use and limit working condition simulation on the soil pressure prediction result to obtain a soil pressure change rule under different excavation conditions; and carrying out retaining structure stress analysis and settlement influence evaluation on the soil pressure change rule to obtain safety evaluation data of the retaining structure. According to the method, the efficiency and accuracy of analyzing the soil pressure of the subway double-side extension foundation pit support structure are improved.

The invention discloses a building foundation settlement and stability long-term monitoring method and system. According to the method, building settlement related data are collected through a distributed optical fiber sensing network, an inclination sensor array and a soil pressure sensor; establishing a soil stress memory effect calculation model, and calculating effective stress considering the memory effect; constructing a building foundation settlement total model containing main consolidation settlement, creep settlement and additional settlement caused by environmental factors; according to the method, risk grade division is carried out based on multi-level threshold values, early warning advance is calculated, an emergency response strategy is generated, intelligent monitoring and early warning of building foundation settlement are achieved, and the method has important engineering application value.

The invention discloses a power transmission tower static pressure prefabricated pipe pile soil squeezing effect assessment method and system, and relates to the technical field of soil squeezing effect assessment, and the method comprises the following steps: obtaining geological exploration data of a construction area, building a three-dimensional geological model, dividing soil body units, and endowing a nonlinear constitutive relation; based on the three-dimensional geologic model, a stress propagation path and a soil squeezing range of soil around the pile are obtained, and a stress concentration area and a local liquefaction risk area are identified; according to the stress concentration area and the local liquefaction risk area, soil compaction effect sudden change risk characteristics at the junction of the hard interlayer and the soft lenticular body are analyzed; and correcting the soil squeezing range by combining the soil squeezing effect sudden change risk characteristics with the real-time pile sinking resistance data, and generating a construction risk early warning map. According to the method, the risk prediction of the soil squeezing effect is provided, the risk is dynamically corrected in combination with the real-time construction data, a visual construction risk early warning map is generated, constructors can find and deal with potential risks in time, and smooth construction is ensured.

The invention provides a shield tunnel dynamic settlement compensation construction method based on an adaptive optimization algorithm, and the method comprises the steps: collecting the ground surface settlement, soil stress and underground water level data in real time through an Internet of Things sensor, achieving the data preprocessing and feature extraction in combination with an edge calculation node, constructing a three-dimensional geologic model, integrating the historical engineering data through transfer learning, and achieving the dynamic settlement compensation of a shield tunnel. The method comprises the following steps: identifying a high-risk area by using a clustering algorithm, designing a hybrid adaptive optimization framework with fusion of random forest and incremental learning, dynamically adjusting shield tunneling speed and soil bin pressure construction parameters, introducing an adaptive step length mechanism to cope with geological complexity change, and identifying a settlement abnormal mode through Fourier transform. Precise compensation is achieved in combination with a layered grouting strategy, the pressure of a soil bin is dynamically adjusted based on a hydraulic system, a closed-loop feedback mechanism is established, the predicted deviation rate is compared with an actual monitoring value, model parameters and the compensation strategy are continuously optimized, the settlement control precision is improved, and the construction risk is reduced.

The invention provides a finite element-based method for estimating pulling-out ultimate bearing capacity of a grouting screw anchor in gravelly soil, and relates to the technical field of civil structure engineering.A three-dimensional finite element model containing the grouting screw anchor and surrounding gravelly soil is established, model parameters cover the structure and material characteristics of the grouting screw anchor, and the grouting screw anchor and the surrounding gravelly soil are subjected to finite element modeling; a coordinate axis is established with the center of the anchor bottom as an original point for grid division, a stress concentration area is analyzed, principal stress is calculated to serve as critical bearing stress, vertical pull-out loads are applied step by step through a grouting pull-out test, a pull-out stress influence area is determined, soil stress of the area is analyzed, and soil binding power and friction force are calculated. And a grouting coefficient and a rock crack coefficient are generated, soil parameters are corrected, and the ultimate pulling bearing capacity of the grouting screw anchor is comprehensively obtained. According to the method, the pulling ultimate bearing capacity of the grouting screw anchor is accurately evaluated by establishing the three-dimensional finite element model and the graded loading experiment.

The invention discloses a slope deformation monitoring system applied to a power transmission and transformation project, relates to the technical field of slope deformation monitoring, realizes high-precision slope displacement calculation by fusing optical fiber voltage signals and Beidou positioning data, constructs an inclination angle prediction model by combining historical inclination angle data, and introduces residual analysis to identify a structure deviation trend. The system dynamically calculates soil stress attenuation based on pore water pressure data, generates a threshold value correction factor driven by a softening coefficient, and then adaptively adjusts a displacement acceleration early warning threshold value to realize adaptation to different geological states. A closed-loop risk identification mechanism is established by monitoring double indexes of displacement acceleration and inclination angle prediction residual error, and the method has the advantages of being timely in response, high in identification precision, low in false alarm rate and the like, and is particularly suitable for power transmission and transformation scenes with complex geological conditions and large rainfall intensity changes.

The invention discloses a shield muck modified slurry grouting reinforcement effect evaluation method based on multi-data fusion, and belongs to the field of shield construction grouting. The method comprises the steps that during field monitoring, a monitoring section is selected according to tunnel geology and structure characteristics, and a sensor is installed; acquiring data of soil pressure, displacement and pore water pressure, calculating corresponding change rate and gradient, and analyzing change trend. According to the numerical simulation, a three-dimensional model is established based on geological exploration and the like to determine parameters, shield propulsion and grouting reinforcement are simulated, and stratum deformation, soil stress and slurry diffusion and permeation data are obtained. And in the data fusion link, the two types of data are subjected to standardization processing, grouting reinforcement effect grades are divided to determine a prior probability, a probability distribution model is established for monitoring indexes, and a posterior probability is calculated through a Bayesian formula to determine an evaluation result. According to the method, various data are integrated, the reinforcement effect can be comprehensively and accurately evaluated, a scientific decision basis is provided for shield tunnel construction, the construction quality and safety are improved, and waste soil resource utilization is optimized.

The invention, which relates to the technical field of the underground diaphragm wall, discloses a comprehensive pipe gallery underground diaphragm wall deformation risk early warning system comprising a data acquisition module, a data analysis module, a risk early warning module, an external environment monitoring module and a real-time monitoring module. The data analysis module is used for analyzing the continuous wall data collected by the data acquisition module, and the data analysis module comprises a deformation prediction unit, a soil stress detection unit and a deformation comprehensive evaluation unit. The soil stress detection unit is combined with the soil pressure and the internal stress of the wall body to perform quantitative analysis on the mechanical property of the underground diaphragm wall, so that the interaction between the soil and the underground structure can be quantified, finally, the deformation comprehensive evaluation unit is used for performing comprehensive evaluation, and different risk levels are set for the result. The early warning effect is achieved, the deformation risk early warning quality is improved, and potential safety hazards are reduced.

The invention relates to the technical field of rock-soil stress monitoring, in particular to a rock-soil stress monitoring data analysis method and system. The method comprises the following steps: acquiring geological data and construction design data of a river bridge construction area, and analyzing piling immersed tube distribution difference to obtain piling immersed tube distribution difference data; performing extrusion lateral stress deflection simulation according to the piling immersed tube distribution difference data, further estimating stress transfer loss to obtain effective stress transfer data, and performing stress impact structure instability analysis between adjacent rocks and soil; and constructing a rock-soil stress risk monitoring model based on a random forest algorithm, and sending the model to a terminal for rock-soil stress monitoring data analysis. The rock-soil stress monitoring technology is optimized, so that the rock-soil stress monitoring technology is more accurate.

The invention discloses a digital twin-driven foundation settlement multi-physics field coupling simulation platform and a use method thereof, relates to the technical field of foundation settlement analysis, and solves the technical problem of settlement prediction deviation accumulation caused by incapability of synchronously updating seepage field and stress field coupling boundary conditions. According to the invention, the twinborn construction unit and the multi-physics coupling solving unit are installed, so that the rapid construction of the digital twinborn of the stratified geologic structure and the multi-physics coupling effect calculation of a stress field, a seepage field and a temperature field of a soil body are realized, and the problem of insufficient precision of traditional single-field simulation is solved; by installing a noise filtering unit and a data standardization unit, elimination of high-frequency interference components of sensor signals and time-space alignment of multi-source data are achieved, the problem that noise interference of geological exploration data is incompatible with heterogeneous formats is solved, and the accuracy and accuracy of foundation settlement analysis are improved. And the reliability of input data and the stability of a simulation result are improved.

A supervision method, system, product and medium for a power construction site. The method comprises the following steps: collecting geological data of a power construction site, and obtaining construction data of hidden engineering; performing space matching on the ground surface settlement amount, the soil stress change and the design position data, and positioning the ground surface settlement amount and the soil stress change at the design position data to obtain engineering displacement data under the action of geological change; substituting the design position data, the material data and the engineering displacement data into a preset stress calculation relational expression to obtain actual stress data; comparing the actual stress data with material stress threshold data in the material data point by point, and determining a stress abnormal part; matching the actual stress data corresponding to the abnormal stress part with the material data in a preset damage type classification table to obtain a matching result which is a damage type; and generating a risk assessment report. By implementing the technical scheme provided by the invention, the accuracy of anomaly detection of hidden engineering under the influence of geological changes is improved.

The invention discloses a mechanical and ground stress combined loading device based on an underground structural member and a loading method thereof, and relates to the technical field of explosion tests. The dynamic response problem of an existing underground structure under the coupling action of soil stress and explosive load is solved. The device comprises an explosive load applying system and a surrounding stress applying system. The explosion load applying system comprises a lifting mechanism, a guide rail, a drop hammer and a test model; the confining stress applying system applies horizontal confining pressure and vertical confining pressure to the test model; the lifting mechanism drives the drop hammer to realize lifting at different heights; the drop hammer applies a vertical uniformly-distributed explosion-like load to the test model; an enclosure structure is arranged at the top of the test model, and sandy soil is arranged in the enclosure structure; a cover plate is arranged at the top of the enclosure structure, a cushion layer is arranged on the cover plate, and a buffer is arranged on the cushion layer; strain gauges are arranged on the surface of the bottom of the test model; and pressure sensors are arranged in the sand dispersion layer and on the inner surface of the test structure model. The method is suitable for underground structure anti-explosion overall effect model test research.

The invention discloses a material point method-based open pile soil plug effect numerical model construction method, which comprises the following steps: carrying out an indoor semi-model tank test by adopting standard sandy soil, and recording data of friction resistance of the inner side and the outer side of a pile, soil stress, soil plug height and a displacement field in a pile sinking process; a geometric model is established based on an indoor model test, numerical simulation is performed by adopting a two-dimensional axisymmetric substance point method in combination with a grid encryption strategy, and data of friction resistance of the inner side and the outer side of a pile, a soil stress field, the soil plug height and a displacement field are obtained; performing comparative analysis on the indoor test data and the numerical simulation result, and if an error meets a preset requirement, confirming the validity of the numerical model; and if the comparison result does not meet the requirement, optimizing the numerical model. The soil plug effect in the pile sinking process can be effectively simulated, the response of the open pile to a stress field and a displacement field of a surrounding soil body can be deeply researched, and a more accurate basis can be provided for structural design and bearing capacity calculation of the open pile.

The invention provides a soil stress monitoring method based on a distributed echo wall optical fiber cavity array, which innovatively utilizes a plurality of echo wall structures to realize distributed multi-point monitoring of soil stress in the same optical fiber, and accurately reflects the spatial distribution of the soil stress by monitoring the resonant frequency change of the echo wall structures; the method comprises the following steps: testing connection; monitoring the resonant frequency of the echo wall of the optical fiber echo wall array sensor; a wide-spectrum light source is adopted to excite an optical fiber to generate an optical signal, after the optical signal is transmitted by the optical fiber, when the optical signal passes through echo wall structures with different diameters of the optical fiber echo wall array sensor, the optical signal resonates at resonant frequencies of the echo wall structures, so that resonant trapped waves on multiple frequencies appear in a transmitted spectrum measured by a spectrograph; monitoring the resonant frequency change of the echo wall structure caused by the soil stress, and obtaining the spatial distribution information of the soil stress.

The invention relates to a water-rich soft soil stratum deep foundation pit dewatering excavation coupling analysis method. The method comprises the steps that an SOIL module on a large-scale commercial finite element software ABAQUS calculation platform is used, a Biot consolidation control equation is adopted to describe the coupling effect of soft soil stress-pore unsteady flow under foundation pit dewatering excavation, a finite element model is established, and in combination with field monitoring experience of foundation pit excavation construction on an adjacent environment influence range, an in-pit dewatering mode is adopted to determine the soft soil stress-pore unsteady flow coupling effect under foundation pit dewatering excavation. The calculation time and the calculation precision are comprehensively considered, and step-by-step refined simulation in the foundation pit construction process is achieved. According to the method, the fluid-solid coupling effect in the dewatering excavation process of the deep foundation pit in the water-rich soft soil stratum can be accurately simulated, the influence of foundation pit excavation on the surrounding environment is effectively predicted, and the engineering safety and reliability are improved.

The invention belongs to the technical field of intelligent agriculture and soil mechanical modeling, and particularly relates to a farmland soil mechanical compaction stress distribution prediction model construction method, which comprises the following steps: S1, constructing a stress distribution measurement model, and arranging stress sensors; s2, obtaining a wheel load and a surface stress of a wheel soil contact surface based on a vertical stress collected by a stress sensor; s3, measuring the stress transfer coefficient of each layer of soil by using a uniaxial compression test; s4, calculating the concentration coefficient of each layer of soil; and S5, obtaining a soil stress distribution model of the ith layer. The model can be used as a bottom-layer mechanical engine of a soil compaction evaluation system, supports data input of an upper-layer risk prediction module, and provides favorable technical support for subsequent prediction of soil compaction, so that effective measures can be taken to avoid soil compaction in advance.

The invention discloses a novel flexible soil pressure sensor and a manufacturing method thereof.The manufacturing method of the novel flexible soil pressure sensor mainly comprises the steps that a silane coupling agent is used for preprocessing a fiber bragg grating, and a silica gel liquid mixture is prepared; after the prepared silica gel liquid mixture is slowly poured into the middle shaft position of the soil pressure sensor mold and stopped, embedding the pretreated fiber bragg grating into a clamping groove reserved in the middle shaft of the soil pressure sensor mold, applying certain prestress to the fiber, and after the position of the fiber bragg grating is arranged, performing the pre-treatment on the fiber bragg grating to obtain a pre-treated fiber bragg grating; and continuously and slowly pouring the silica gel mixed solution to the top of the soil pressure sensor mold, curing and forming for 8 hours, and taking out the soil pressure sensor from the soil pressure sensor mold. The novel flexible soil pressure sensor prepared by the invention is a cake-shaped soil stress sensor with a cross-shaped fiber Bragg grating sensing unit, and has better repeatability and stability, higher sensitivity and better linear correlation.

The invention discloses a disturbance degree unified evaluation method considering soil stress and structural change, and belongs to the technical field of rock soil and underground engineering. The method comprises the following steps: calculating a soil body average effective stress used for representing a soil body stress state, and a body strain and a shear strain used for representing a soil body initial structure; calculating structural parameters for representing the initial structural property of the soil body; and substituting the calculated average effective stress, the shear strain, the body strain and the structural parameters of the soil body into a soil body disturbance degree evaluation formula, respectively calculating soil body disturbance degrees SDD under an unloading working condition and a loading working condition, and evaluating soil body disturbance caused by underground engineering construction. The method has the beneficial effects that the stress level change and the soil structure change caused by underground engineering construction are comprehensively considered, and the accuracy of disturbance degree evaluation is improved; soil disturbance can be accurately predicted before construction, and the method has important guiding significance on actual engineering deformation prediction, reinforcement scheme optimization and the like.

The invention discloses an abandoned mining area vegetation recovery method based on a community succession law, and belongs to the field of abandoned mining area vegetation recovery. Comprising the steps of initial environment data intelligent collection and soil stress evaluation, succession pioneer community big data intelligent screening and matching, multilevel planting scheme optimization based on a self-adaptive genetic algorithm, intelligent soil improvement agent directional putting and whole-process dynamic monitoring and self-adaptive feedback regulation and control. Multi-dimensional environment data are obtained through means such as remote sensing and a sensing network, local dominant species are recommended and configured in a partitioned and staged mode by applying intelligent models such as multi-factor stress clustering, collaborative interaction succession adaptation and a genetic algorithm, and soil microorganism interaction is combined to optimize recovery measures. Vegetation and soil evolution is monitored in real time, dynamic adjustment and optimal succession driving are achieved, and scientificity, efficiency and sustainability of ecological restoration of the abandoned mining area are effectively improved.

The invention provides a method for sinking an open caisson without drainage, and belongs to the technical field of open caisson sinking. Comprising the following steps: laying soil sampling points; measuring the elevation of the mud surface; planning a soil sampling path; and the intelligent soil sampling equipment samples soil along a preset path. The gravity sensor senses the weight change of the dredge pipe to judge grounding, the multi-beam sounding system obtains three-dimensional data of a mud surface and an artificial intelligence algorithm optimization model, and the artificial intelligence algorithm is used for laying soil sampling points and planning a soil sampling path and depth according to soil body parameters such as the weight of the soil body and stress-strain monitoring data. A laser range finder is used for determining the position of a mud suction pipe; soil stress and strain and mud surface change are monitored in real time during soil sampling; the soil sampling depth and time are dynamically adjusted by an artificial intelligence algorithm; the purposes of precision and visualization of mud surface elevation measurement, scientization and precision of soil sampling planning, intelligent control of the soil sampling process and remote intelligent centralized control of construction are achieved.

The invention provides a soil body-structure interaction boundary damage quantitative testing device and method, and relates to the technical field of geotechnical engineering test.The soil body-structure interaction boundary damage quantitative testing device comprises a stress conduction boundary shear strength and rigidity combined testing structure and a testing system integrating a shaft confining pressure-temperature collaborative loading system and a monitoring collection and process control system; through an improved slurry sample preparation method, tight connection and constant contact area between the hollow columnar soil sample and the friction pile body are ensured, and the test sealing performance is enhanced through the elastic sealing design; the real-time measurement of the rigidity of different positions in the whole shearing process is realized by virtue of the excitation damage detection element capable of synchronously moving; according to the method, the constitutive model of the marine rock-soil stress conduction boundary domain is perfected, a reliable experimental basis is provided for foundation design of deep-sea engineering such as submarine pipelines and anchoring structures, and the method has important theoretical value and engineering significance for improving design scientificity and safety of deep-sea infrastructures and preventing and controlling submarine geological disasters.

The present invention discloses a method for predicting the lateral deformation of a drainage board foundation under vacuum combined preloading, comprising the steps of calculating the initial undrained shear strength of the foundation soil, calculating dimensionless characteristic parameters, calculating the stress ratio of the soil at the end of the preloading, calculating the reference vertical strain of the soil under one-dimensional compression conditions, calculating the ratio of the lateral strain to the one-dimensional compressive strain of the soil, calculating the lateral strain of the soil, and calculating the lateral deformation of the foundation. This application is based on a relationship diagram between the stress ratio and the characteristic parameters and a quantitative relationship diagram between the lateral strain / one-dimensional compressive strain of the soil and the soil stress ratio / static earth pressure coefficient of the soil. The method can quickly calculate the lateral deformation of the drainage board foundation under vacuum combined preloading, providing a reference for the design of drainage board foundations treated with vacuum combined preloading.

The utility model discloses a light overhead roadbed structure which comprises an upper main body structure, the upper main body structure is in a segment type, an expansion joint is arranged between the adjacent upper main body structures in the line direction, the lower end of the upper main body structure is provided with a joist structure connected with the upper main body structure, and the joist structure is supported by a pile structure. And thick broken stone hardcore layers in contact with the upper main body structure are further paved between the beam structures. The middle of the overhead roadbed structure is hollow, the overhead roadbed structure has the advantages of being small in filler amount, light in weight, small in soil body additional stress and capable of remarkably reducing post-construction settlement caused by the additional stress. The overhead roadbed structure is small in structural size in the cross section direction, has the advantage of being small in occupied area, and can save land. The overhead roadbed structure adopts a foundation form of the joists and the cast-in-situ bored piles, has the characteristics of high stability and strong lateral deformation resistance, and is safe and reliable in structure.

The invention relates to a dynamic rotary shear testing device and a dynamic rotary shear testing method for evaluating a crawler-soil shear effect of a deep-sea mining crawler. Comprising a four-state environmental control system which is composed of different-state soil and an annular structure and simulates the surface characteristics of deep-sea soft soil in transition from a flow state to a plastic shape along with depth increase; the soil stress simulation system is composed of an air bag and a sand cushion layer and accurately reproduces the stress state of the crawler teeth in the deep sea environment; the soil body loading system is composed of a sand cushion layer, an air bag and a high-pressure air cylinder and is used for simulating deep sea soil environments with different burial depths; the track tooth dynamic rotary shear test system is composed of a blade, a torsion bar and a variable frequency motor, and simulates the influence of multiple types of track teeth on the shear strength of deep sea soil; and the data acquisition system consists of a pressure sensor and a dynamic torque sensor. According to the invention, the shear failure process of multiple types of crawler teeth to soil under different deep-sea working conditions is simulated with high precision, the device is simple and easy to operate, and technical support is provided for design optimization of a deep-sea crawler and a crawler-soil action mechanism.

The invention discloses a discrete-semi-rigid combined pile composite foundation for deep soft soil reinforcement and a design method. The composite foundation comprises semi-rigid piles, discrete piles, a deformation adjusting layer, a reinforced mattress layer, a deep soft foundation and a hard rock-soil layer. The semi-rigid pile is located in the middle of the discrete pile and is coaxial with the discrete pile, a pile body penetrates through the deep soft foundation, the pile bottom enters a hard rock-soil layer, and a deformation adjusting layer is arranged on the upper portion of the pile top to the bottom of the reinforced mattress layer; the discrete pile wraps the upper section of the semi-rigid pile, and the pile bottom is arranged in the deep soft foundation; the deformation adjusting layer is located at the top of the semi-rigid pile; the reinforced mattress layer is located on the top of the soft soil layer. By means of the compaction, replacement and drainage functions of the discrete piles, the problems that when single semi-rigid piles are adopted for reinforcing deep soft soil, the pile body quality is difficult to control, the pile side negative friction resistance is large, and the pile-soil stress ratio is high are solved; the method has the advantages of improving the bearing capacity of the composite foundation, accelerating consolidation and settlement of the soft foundation, coordinating the pile-soil stress ratio, reducing the reinforcement cost, saving the construction period and the like.

The invention discloses a highway slope prestress guyed displacement intelligent monitoring and early warning system, and relates to the technical field of highway slope displacement monitoring and early warning, the highway slope prestress guyed displacement intelligent monitoring and early warning system comprises a monitoring module, an early warning module and a database, the monitoring module comprises a vehicle sensing assembly and a soil sensing assembly, the vehicle sensing assembly is connected with the database through signal transmission, and the soil sensing assembly is connected with the database through signal transmission. The vehicle sensing assembly comprises a weighing unit, a vibration and stress coupling monitoring unit and a model building unit, the weighing unit collects vehicle information and transmits the vehicle information to the database, and the vibration and stress coupling monitoring unit is used for collecting vibration frequency, energy distribution and soil stress dynamic changes caused by vehicle passing; the information is transmitted to a database, and the model building unit is used for building a vehicle load-slope stress transfer model. According to the method, the vehicle load-slope stress transfer model is constructed by collecting the vehicle driving information, and the function of quantifying the influence of the vehicle load on the slope is achieved.

An intelligent concrete vibrating rod comprises an upper shell and a lower shell which are connected with each other, the upper end of the upper shell is in threaded connection with a rod head of the vibrating rod, the upper shell is of a hollow barrel structure, a mounting base is arranged at the lower end of the outer side of the upper shell, a soil stress sensor is embedded in the mounting base, and a connecting sleeve is arranged at the upper end of the outer side of the upper shell; the upper shell is provided with a threading hole between the connecting sleeve and the mounting base, a sealing sleeve is arranged between the connecting sleeve and the mounting base, the lower shell is provided with a containing cavity with an opening in the top, the top of the containing cavity is connected with an upper cover, a bearing support is arranged in the containing cavity and used for fixing an attitude sensor, and damping springs are arranged on the top, the bottom and the side face of the bearing support. The upper cover is used for abutting against the inner wall of the containing cavity or the upper cover, and the containing cavity is filled with damping media. The installation mode is convenient and fast, an existing conventional vibrating rod can be directly compatible, lossless rapid installation is achieved, a multi-stage damping mechanism is integrated in a limited space, and the measurement stability and compactness judgment capacity in a strong vibration environment are improved.

This invention discloses a modeling method for layered soft soil subgrades reinforced with pile foundations under simulated seismic loading, belonging to the field of seismic numerical simulation in geotechnical engineering. This method constructs a multi-field coupled numerical model based on a finite element platform, defines the contact mechanisms at the pile-soil and reinforced-subgrade interfaces, and completes the construction of in-situ stress equilibrium and initial pore water pressure fields. Static results are output through fill-consolidation coupling analysis. Distributed viscoelastic artificial boundaries are automatically constructed using Python scripts, and seismic waves are converted into equivalent nodal loads using wave theory. Multi-physics field connections between static and dynamic analysis boundaries are achieved, and core response parameters such as embankment settlement and pile-soil stress are output through implicit dynamic analysis. This invention considers the seismic wave propagation effect in layered soils, reduces spurious oscillations caused by the transformation of static and dynamic boundaries, and improves simulation accuracy and efficiency. It is suitable for seismic design and analysis of transportation infrastructure in soft soil areas.

The utility model provides a soft soil plank road foundation structure which comprises a timber pile assembly, a foundation assembly and a foundation assembly. The bottom of the timber pile assembly is located in a soft soil layer. The mattress layer is arranged above the timber pile assembly, and the top of the timber pile assembly is wrapped in the mattress layer; the concrete cushion layer is positioned above the mattress layer; and the stone pile layer is located above the concrete cushion layer. The timber pile assembly is arranged in soft soil, the timber pile assembly replaces low-strength soft soil with the same size as a pile body, and when the timber pile assembly is subjected to external loads, stress in a foundation is redistributed according to the pile-soil stress ratio; stress is concentrated on the timber pile assembly, stress borne by soil around the pile body is correspondingly reduced, and most loads are borne by the timber pile assembly. The strength and the deformation resistance of the piles are superior to those of a soil body, so that the bearing capacity and the coefficient of the formed composite foundation are superior to those of the original soil body, and the effects of reducing deformation and improving the bearing capacity can be achieved.

The invention discloses a shear box device for emitting visual smoke signals to early warn landslide disasters, particularly relates to the technical field of geological disaster monitoring and early warning, and solves the technical problem of insufficient early warning coverage rate of monitoring equipment in the prior art. The device is precisely deployed at a key monitoring point with soil stress high-sensitivity response in a potential landslide area, when geological disasters such as landslide occur, a stress field in a soil body is remarkably changed, upper and lower discs of a stratum slip interface are caused to generate relative shear motion, and then the upper and lower shear boxes are driven to generate displacement response, so that the soil body stress can be accurately detected. When the displacement reaches a preset threshold value, the load borne by the connecting mechanism breaks through the triggering critical value of the ignition device, then a rapid thermal activation mechanism is started, smoke signal powder in the smoke signal generation cabin is ignited, a high-visibility visual smoke signal is generated instantaneously, and visual early warning of the landslide danger can be achieved.