222 results about "Soil resistance" patented technology

A method and apparatus for evaluating vulnerability of monopile foundations of offshore wind turbines are provided. The method includes collecting offshore wind farm location data and wind-wave characteristic data, and simulating a wind-wave time course according to the offshore wind farm location data and the wind-wave characteristic data; determining a wind-wave dynamic load based on the wind-wave course; obtaining lateral soil resistance data of monopile foundations with a plurality of rock-soil strength parameters, and inputting the wind-wave dynamic load into a 3D finite element model; using the lateral soil resistance data of monopile foundations with a plurality of rock-soil strength parameters as boundary conditions of the 3D finite element model; and giving a limit state of monopile foundations, and determining vulnerability of monopile foundations on basis of the dynamic response result of the monopile foundations and the limit state of monopile foundations.

The invention discloses a soil resistance perception-based multi-mode adaptive subsoiling mechanism, which comprises an integral rack, a subsoiling monomer, a control system and an energy device, the subsoiling monomer detects soil resistance in real time through a sensor assembly and transmits the soil resistance to the control system, and the control system controls the subsoiling monomer according to the magnitude and change characteristics of the soil resistance. The subsoiler is automatically switched among three modes of traditional rigid connection subsoiling, self-excited vibration subsoiling and forced vibration subsoiling; when the soil resistance is smaller than a first preset threshold value, a rigid connection mode is adopted; when the resistance is between a first preset threshold value and a second preset threshold value, a self-excitation vibration mode is started; and when the resistance is greater than a second preset threshold value, the vibration motor is started to realize forced vibration. The control system not only monitors the resistance absolute value, but also analyzes the time characteristic to realize intelligent threshold adjustment. The problems that a traditional subsoiling mechanism is high in energy consumption and poor in adaptability are solved, and the intelligent subsoiling mechanism has the advantages of intelligent operation mode switching, optimized energy utilization, adjustable vibration parameters and the like.

The invention relates to the technical field of cathode protection, in particular to a method for optimizing cathode protection of a complex buried pipe network under current interference, which comprises the following steps of: collecting data of soil resistivity, pipeline material and environment humidity from differentiated industrial areas by adopting an on-site sampling mode, and analyzing the variation and relevance of the data to obtain the cathode protection of the complex buried pipe network. And obtaining environmental parameter characteristics. According to the invention, through the scene test adjustment model of the simulation environment, various complex interference conditions can be accurately corresponding, the distribution of current and potential can be optimized, the stability of the cathode protection system in the variable interference environment is improved, and through the simulation of the electromagnetic field data and the multi-round simulation test, the fine adjustment of the current and potential parameters is realized; the anti-corrosion effect of the buried pipe network and the overall efficiency of the system are remarkably improved, long-term safety and stability of the buried pipe network in a complex current interference environment are ensured through real-time monitoring and adjustment, and the service life of facilities is remarkably prolonged.

The invention provides an open caisson sinking control method based on dynamic balance of a soil resistance field, which comprises the following steps of: judging whether an open caisson posture dynamic balance condition is met or not according to an open caisson bottom surface soil resistance vector field and an open caisson posture offset, if not, intervening space distribution of the open caisson bottom surface soil resistance vector field, and reconstructing the open caisson bottom surface soil resistance vector field; the dynamic balance condition of the open caisson posture is met; and based on the open caisson bottom surface soil resistance vector field, the height difference vectors of the adjacent bins on the open caisson bottom surface and the soil taking control matrix, a dynamic decision objective function is constructed, the objective function is solved, an optimal soil taking control matrix is obtained, and an actuator cluster is controlled to take soil from the bins on the open caisson bottom surface. According to the method, the influence of dynamic evolution of the soil resistance field of the bottom face of the open caisson on the open caisson attitude offset is considered, the soil resistance field is dynamically adjusted, the open caisson attitude is accurately controlled, and soil taking control is optimized.

The invention discloses an oil and gas pipeline stray current corrosion degree multi-mode quantitative evaluation method and system. The method comprises the steps that stray current parameters, potential gradient distribution and magnetic field intensity data of an oil and gas pipeline are collected in real time; dynamic current density characteristics are extracted from the stray current parameters, and a corrosion hot spot area is constructed according to the dynamic current density characteristics and potential gradient distribution; on the basis of the corrosion hot spot area, the magnetic field intensity data and the soil resistivity parameter are fused, and a stray current corrosion intensity index is calculated; and establishing a corrosion rate prediction model based on the historical stray current corrosion intensity index and the environmental variable, inputting the currently calculated stray current corrosion intensity index into the corrosion rate prediction model, and outputting the corrosion degree and the residual safety life of the pipeline. According to the method, multi-modal information such as dynamic current density characteristics, potential gradient distribution and soil resistivity can be integrated, the corrosion hot spot area can be accurately identified, and the accuracy of the evaluation result of the stray current corrosion degree of the oil and gas pipeline is improved.

The invention relates to the technical field of vegetation root system nondestructive testing, in particular to a multispectral vegetation root system identification system and method based on a differentiable physical engine, and the system comprises a multispectral LiDAR module which is used for transmitting near-infrared laser and short-wave infrared laser, scanning a target area, obtaining dual-wavelength reflectivity data, and determining the vegetation root system according to the dual-wavelength reflectivity data; generating a reflectivity ratio matrix by adopting a reflectivity ratio classification model; the differentiable physical engine is used for quantizing the dynamic relationship between the vegetation root growth rate and the soil resistance by adopting a coupling model according to the reflectivity ratio matrix, generating a physical model and updating the physical model at a preset time interval; and the data processing and three-dimensional modeling module is used for generating a three-dimensional root system model and a health assessment result according to the reflectivity ratio matrix and the physical model, and outputting the three-dimensional root system model and the health assessment result. According to the scheme, soil penetration and root system and foreign matter distinguishing can be carried out, the vegetation native environment is not damaged, dynamic monitoring analysis is carried out, and the accuracy of recognition analysis is improved.

The invention discloses a stress calculation method of a composite pull disc and a weaving method of the composite pull disc and an insulation rope section, belongs to the field of electric power tools, solves the problem that stress of the composite pull disc is difficult to assess, and adopts the technical scheme that the composite pull disc comprises a pull wire disc and a pull wire, one end of the pull wire is fixed on a tower, and the other end of the pull wire is fixed on the pull wire disc; the stay wire disc is installed on the ground and is used for the upward pulling force acting on the stay wire foundation, the calculated volume weight of soil, the included angle between the stay wire and the ground, the foundation upward pulling stability safety coefficient related to the soil resistance, the upward pulling stability safety coefficient related to the self-gravity of the foundation, the volume of anti-pulling soil in the depth, the upward pulling angle of the foundation and the self-gravity of the foundation. Wherein the upward pulling stability of the stay wire needs to be met. According to the invention, the stress evaluation of the composite pull disc is realized more conveniently.

The present invention relates to the technical field of electric power safety protection, and particularly relates to a method for monitoring and evaluating the corrosion state of a grounding grid. The method comprises the steps of: acquiring a soil environment pH value of a grounding grid region; acquiring a soil Cl ion concentration of the grounding grid region; acquiring a corrosion potential of the grounding grid region; acquiring a corrosion rate of the grounding grid region; and on the basis of a soil resistivity, the soil environment pH value, the soil Cl ion concentration, the corrosion potential and the corrosion rate, determining the corrosion state of a grounding grid. Thus, by means of introducing determination parameters of a soil resistivity, a soil environment pH value and a soil Cl ion concentration, the corrosion state of a grounding grid can be more accurately determined and evaluated, such that the operational safety and service life of a substation grounding grid are more effectively evaluated, thereby providing technical support for electric power operation and maintenance personnel to take more scientific and rational maintenance measures.

The invention relates to the technical field of soil pollution monitoring, in particular to a soil pollutant detection and evaluation method and system based on high-density resistivity. The method comprises the following steps: acquiring soil information data; performing soil uniformity analysis on the soil information data to generate soil uniformity data; performing electrode arrangement mode selection based on the soil uniformity data to generate soil electrode arrangement mode data; performing soil resistivity data acquisition according to the soil electrode arrangement mode data to obtain soil resistivity data; performing resistivity inversion on the soil resistivity data to generate a soil resistivity distribution diagram; and performing resistivity anomaly identification on the soil resistivity distribution map to generate abnormal resistivity identification data. By optimizing soil uniformity analysis, electrode arrangement, resistivity inversion and pollutant diffusion analysis, the accuracy in the soil pollutant detection and evaluation process is improved.

The invention discloses a grouting splitting pressure simulation device under high-ground and high-water-pressure conditions, and relates to the technical field of tunnel and underground engineering model tests. A first water permeable unit controlled by the water injection unit and a second water permeable unit controlled by the confining pressure unit are respectively arranged at two ends in the length direction, so that water pressure and stratum confining pressure are independently applied. The integrated grouting unit of the device is used for grouting soil in the box and is provided with a comprehensive detection unit, the comprehensive detection unit monitors various parameters such as grouting pressure, water pressure, confining pressure, flow, soil resistance and wave velocity in real time, and independent loading and accurate dynamic control of the grouting pressure, formation water pressure and formation stress can be achieved; therefore, the grouting process of the deep-buried tunnel under the conditions of different burial depths, high water head differences and complex grout characteristics can be simulated in a laboratory with high precision, and the technical bottleneck that the complex environment of high ground stress and high water pressure coupling is difficult to reproduce in a traditional test method is effectively solved.

A follow-up speed-increasing push, press, and throw integrated inter-row straw cleaning device suitable for no-till seeding units is mainly composed of a connecting frame, a straw pushing disc, a pressure and throwing disc, and a planetary gear transmission system. The straw pushing disc rotates around the center under the combined action of the device's own gravity and soil resistance, and the pressure and throwing disc is driven by the planetary gear transmission system to increase the speed of rotation. When the device moves forward at a fast speed, straw accumulates on the surface of the straw pushing disc. When the straw accumulates to the sweeping height of the pressure and throwing disc, the pressure and throwing teeth of the pressure and throwing disc press the accumulated straw and then throw it to the side and rear. The tooth profile curve of the pressure and throwing teeth is a combination curve of the Archimedean spiral and the Cartesian leaf line, which can realize the process of first pressing and then throwing the accumulated straw. The combined curve pressure and throwing teeth are straw sliding cutting and throwing rather than picking and throwing. On the one hand, it prevents the accumulated straw from crossing the straw pushing disc to cause blockage. At the same time, it ensures that the side-thrown straw has a low initial throwing velocity to avoid straw throwing to the adjacent sowing interval.

The invention discloses a grounding resistance thermal-electric coupling prediction method and system suitable for various soil scenes. The method comprises the following steps: acquiring an electrode parameter, a soil parameter, a grounding fault parameter and initial temperatures of an electrode and soil; calculating an electrode current and a soil leakage current of the time step based on the electrode and soil resistivity of the time step; based on the electrode current and the soil leakage current of the time step, calculating the electrode temperature, the soil radial temperature distribution and the grounding potential rise of the time step by adopting a finite difference method; based on the electrode temperature and soil radial temperature distribution of the time step, updating the electrode resistivity and the soil resistivity of the time step + 1; if the end of the fault time is not reached, returning to continuously calculate the temperature of the electrode and the soil at the time step + 1; otherwise, outputting the electrode temperature and soil radial temperature distribution of each time step. According to the invention, thermal-electric dynamic coupling is considered, and accurate evaluation of the performance of the grounding system is realized.

The invention belongs to the technical field of electric suspension control of tractors, and particularly relates to an electric suspension system of a tractor matched with a rotary cultivator and a control method of the electric suspension system. The system comprises a fuel cell, a power cell, a fuel cell controller, a power cell controller, a high-voltage distribution box, a DC / DC converter, a whole machine controller, a control panel, a force sensor used for measuring tillage resistance during operation of the rotary cultivator, a tilt angle sensor used for measuring the tilt angle of a universal joint of the rotary cultivator, an angular displacement sensor, a servo electric cylinder, a lifting pull rod and a lifting rod. A lower pull rod; operation parameters of the rotary cultivator are input through the control panel, the sensors transmit the measured parameters to the whole machine controller, the comprehensive tilling depth is calculated according to the position of the electric cylinder and the soil resistance, the servo electric cylinder is controlled to stretch out and draw back according to the comparison between the comprehensive tilling depth and the preset tilling depth, and therefore the tilling depth of the rotary cultivator is adjusted. The device has the advantages of being simple in structure, convenient to maintain and high in applicability.

The invention relates to the field of data analysis, in particular to a farmland soil compaction diagnosis method based on multi-source sensor data, and the method comprises the steps: carrying out the gradient energy feature construction and phase alignment cross-correlation evaluation of soil resistance depth curve data, and obtaining a gradient energy phase locking factor; carrying out rheological consistency coupling evaluation on the morphological characteristics of the soil resistance depth curve and the soil volume moisture content to obtain a rheological morphological coupling factor; performing joint correction on the basic Euclidean distance to obtain an adaptive similarity distance and executing clustering iteration; spatial modeling and prescription mapping are carried out on a clustering result and sampling point position information, so that a soil compaction accurate diagnostic graph is obtained, and a differentiated subsoiling operation instruction is generated; the method solves the problem that the existing Euclidean distance easily causes the characteristic dislocation of the compaction layer and the deformation of the rheological strength under the condition of farmland micro-topography fluctuation and water content difference to cause the distortion of the clustering partition.

The invention discloses a multi-port resistance measurement and corrosion positioning integrated system for a grounding grid, relates to the technical field of resistance measurement and corrosion positioning, and is used for solving the problems that the soil resistivity greatly fluctuates along with the moisture content due to high moisture content and complex change of a clay field: the conductive ion concentration is increased and the conductive performance is enhanced due to increase of the moisture content in soil; and the resistivity is obviously reduced. Apparent conductivity and noise level are monitored in real time, self-adaptive switching is carried out between regional flow injection and selective flow injection, and high-precision resistance data can still be obtained under extreme working conditions such as alternation of wetting and drying or sudden increase of noise in combination with an automatically-adjusted current amplitude; all branch resistors are jointly solved through a parallel conjugate gradient inversion algorithm, and confidence quantification is performed on a positioning result by using a posterior covariance matrix to output a thermodynamic diagram; and the early warning closed-loop module introduces the current moisture content, the signal-to-noise margin and the flow increasing rate into real-time correction of a threshold and life model, triggers grading alarm and automatically generates a maintenance work order.

The invention provides a Kirchhoff's law-based power distribution network line loss abnormity positioning method and device, and the method comprises the steps: obtaining the temperature, moisture content and salt content parameters of soil through a multi-sensor integrated monitoring probe, embedding a special temperature and humidity sensor for a frozen soil region in the top of the multi-sensor integrated monitoring probe, and embedding a soil moisture content TDR probe in the middle of the multi-sensor integrated monitoring probe, a salt content monitoring conductivity sensor is embedded in the bottom; constructing a permafrost region resistivity correction model based on the parameters; a dynamic compensation Kalman filtering algorithm is adopted to process a model output value, and the output dynamic correction soil resistivity is transmitted to a grounding electrode detector host; and the host fuses the correction value and the electromagnetic signal acquired by the electromagnetic signal receiving sensor, and outputs the distribution state of the grounding electrode. According to the invention, a multi-sensor integrated probe is used to acquire parameters to construct a model, and a correction value and an electromagnetic signal are fused after dynamic correction by a Kalman filtering algorithm, so that the detection precision of the plateau permafrost region is improved.

The invention provides a test device and method for simulating pile wall integrated whole process performance evolution, and belongs to the technical field of underground structure pile wall simulation. Comprising a measuring device, a supporting device, a self-reaction force device erected above the supporting device, a restraining device placed on the upper surface of the supporting device, a test piece placed on the upper surface of the restraining device and a loading device fixed to the bottom of the self-reaction force device. The loading device is used for applying a load to the surface of a test piece to simulate active side soil pressure, the restraining device comprises a rolling shaft, a spring base plate and a fixed base plate, the test device simulates horizontal supporting counter-force of a foundation pit and resistance of soil below an excavation face of the foundation pit through the spring base plate and the fixed base plate in sequence, and the test progress is controlled through the measuring device. And recording the whole experiment process. Soil spring and support effects can be simulated by using different types of base plates, the spring base plate can well simulate soil layer conditions, and the fixed base plate has good support simulation conditions due to high rigidity.

This invention discloses a method for dynamic perception and intelligent precise control of multimodal data in the sludge solidification construction process, belonging to the field of intelligent control of engineering machinery. This method collects the global pose of the machine body, driving power parameters, and visual image sequences containing high-position markers. Utilizing a vision-inertial fusion algorithm for engineering machinery with kinematic constraints, it calculates the real-time three-dimensional trajectory and attitude of the mixing head underground while resisting sludge obstruction and vibration interference. Furthermore, it discretizes the mixing trajectory to construct the effective sweep volume of micro-element trajectory segments and, combined with adaptive soil resistance indicators, establishes a physical closed-loop control model based on the target unit volume grouting density. This invention abandons traditional linear empirical control logic and solves the problem of uneven distribution of solidifying agent caused by the tilting and variable speed motion of the mixing head by real-time matching of sweep volume and grouting energy, achieving microscopic calculation control and full-process traceability of the construction quality of concealed works.

The invention discloses a method for determining the pile top rigidity of a horizontal load-bearing friction type pipe pile, which comprises the following steps of: adopting a theoretical method, regarding a soil body around the pile as a viscoelastic continuous medium, and deducing a pile top rigidity expression of the horizontal load-bearing friction type pipe pile by using an analytical method based on a proposed friction type pipe pile theoretical model under the horizontal load; the method has strict logicality; meanwhile, the influence of pile periphery soil mass resistance and pile core soil mass resistance on the pipe pile is considered, and the method is more practical; according to the method, related parameters are substituted for calculation, the image drawn according to the obtained result can accurately describe the condition of the horizontal pile top rigidity of the friction type pipe pile under the horizontal load effect, the method is efficient, simple and convenient, the calculation result is specific and clear, and good reference can be provided for actual application of the friction type pipe pile in the pile foundation field.

The utility model discloses a constructional engineering pile which comprises a bearing platform, a plurality of engineering piles are fixedly installed on the outer wall of the bottom of the bearing platform through bolts, a plurality of longitudinal grooves are formed in the outer wall of the side face of each engineering pile, a hanging plate is fixedly installed at the top end of each engineering pile through bolts, and a positioning groove is formed in the outer wall of the top of each hanging plate. A through hole is formed in the inner wall of the bottom of the positioning groove, an insertion hole is formed in the top end of the longitudinal groove and is communicated with the through hole, and a plurality of lifting lugs are fixedly installed on the outer wall of the top of the lifting plate through bolts. The engineering pile is of a cylindrical structure, when the engineering pile is driven into a soil layer, surface stress is even, the engineering pile can be effectively prevented from deflecting, soil resistance borne by the engineering pile is small, a plurality of longitudinal grooves are formed in the surface of the engineering pile, the size of the engineering pile can be reduced through the longitudinal grooves, the influence of soil squeezing is greatly reduced, and the engineering pile is suitable for being popularized and used. And the surface area can be increased, so that the engineering pile is more stable.

This invention discloses a method, system, equipment, and storage medium for calculating the deformation of a pipe-jacking structure considering the soil resistance between the pipe and culvert. The method includes the following steps: S1. Simplifying the pipe-jacking structure as an elastic thin plate, and further simplifying the problem to the deformation of an elastic thin plate with fixed opposite sides and simply supported opposite sides under a uniformly distributed load on a Winkler elastic foundation, obtaining the differential equation of the bending surface of the thin plate on the Winkler elastic foundation and the expression for the boundary conditions of the thin plate; S2. Determining the elastic modulus when the pipe-jacking structure is simplified to an elastic thin plate, and calculating the bending stiffness D of the pipe-jacking structure; S3. Solving the differential equation of the bending surface of the thin plate on the Winkler elastic foundation using a hybrid solution method combining trigonometric series and the force method, obtaining the deflection formula of the elastic thin plate placed on the elastic foundation under a uniformly distributed load. This invention can accurately predict the deformation of pipe-jacking structures.

The utility model discloses a kind of conductor shielding terminal annular array ground structure, the utility model relates to electrical engineering technical field, the utility model, comprising: connecting end, the outer wall of the connecting end is slidably connected with annular device, the annular device is locked by rotating mode, the bottom of the annular device is fixedly connected with grounding device, the annular device includes receiving end;By setting the cooperation of annular device and grounding device, the contact of the circumferential array arrangement in receiving end inner wall is slidably connected with connecting end, forms 360 ° full circumferential conductive passage, compared with traditional single-point grounding mode, contact area is improved by more than 3 times, lock ring is rotated 30 ° by dialing dial piece, the locking of connecting end and annular device can be completed, main sharp cone cooperates bulldozing block design, soil resistance is reduced, can directly penetrate clay layer with greater hardness;Sub sharp cone is automatically unfolded in soil extrusion during soil entering, forms umbrella-like grounding network, the purpose of equivalent grounding area expansion.

The utility model relates to a heavy metal contaminated soil remediation agent spraying device, which comprises a frame, a front wheel and a rear wheel are respectively arranged on the frame, and the heavy metal contaminated soil remediation agent spraying device is characterized in that a soil turning device and a spraying device are respectively arranged on the frame; wherein the soil turning device comprises a mounting frame rotationally arranged on the lower side of the frame and a driving component for driving the mounting frame to swing and turn over, and a plurality of plowshares are arranged on the mounting frame at intervals in the direction from the front wheels to the rear wheels. The plowshares located on the mounting frame swing along with the mounting frame to form soil turning depths of different horizontal depths relative to the frame, so that the soil turning depths of the plowshares are controlled, the plowshares are arranged in a step-shaped progressive increase mode, layered soil turning is achieved, soil resistance is reduced, a repairing agent is sprayed to the turned soil in cooperation with the spraying device, and the soil turning efficiency is improved. Therefore, the remediation agent can be quickly and uniformly dispersed to remedy the soil.

The invention discloses an automatic weeding device for solanaceous fruit farmland and a using method, and relates to the technical field of agricultural equipment.The weeding device is characterized in that a weeding assembly is arranged in a weeding outer shell, the resistance of a main blade during weeding is increased, and the main blade drives a sliding rod to slide in a U-shaped flow channel in a hydraulic shell; the first piston pushes the second piston to slide in the U-shaped flow channel through hydraulic oil in the U-shaped flow channel, the second piston pushes the soil loosening teeth to be ejected out, and the soil breaking cones at the front ends of the soil loosening teeth loosen soil. Soil is loosened through the soil breaking cones at the front ends of the soil loosening teeth, the device can go deep into the soil to bring out weed root systems, the problem that a traditional device only removes stems and leaves and residual root systems is solved, the weed removal rate is remarkably increased, and when the soil loosening teeth stretch out, the limiting blocks abut against the vertical faces of the wedge-shaped check blocks to form mechanical limiting; retraction of the soil loosening teeth caused by soil resistance in the soil loosening process is prevented, and it is ensured that the soil breaking cone continuously goes deep into soil.

The invention provides a wind turbine generator grounding geology and soil exploration analysis method, and belongs to the field of wind turbine geological exploration. The method mainly comprises the following steps: firstly, selecting a proper exploration site for field observation; then, testing the soil resistivity at different positions and directions by adopting a Wenner quadrupole method to obtain sufficient test data; and finally, the collected measurement data and the fitting function are utilized to inversely calculate the distribution conditions of the soil in the vertical and horizontal directions, and an accurate soil structure model is constructed. Moreover, the method can also perform correction processing on test data so as to adapt to the influence of factors such as seasonal variation on the test result. The method has the advantages of being easy to operate, accurate in result, high in adaptability and the like, the problems existing in the prior art can be effectively solved, and the accuracy and scientificity of wind turbine generator grounding design are greatly improved.

The invention provides an equivalent circuit analysis method and system for soil resistance heating efficiency, and relates to the technical field of soil remediation. Resistivity distribution data and salt content distribution data of a pile space are obtained; calculating the ionic conductivity according to the salt content distribution data, and calculating the target conductivity of each grid unit; constructing a topological graph, and constructing a weighted adjacent matrix based on the topological graph; constructing a degree matrix according to the degree of each graph node to obtain a feature value sequence and a feature vector corresponding to each feature value; extracting a second small feature value from the feature value sequence as a connectivity index, and marking a mutation position as a weak connection interface; the blocking factor is determined by counting the number of graph nodes located at the weak connection interface, the equivalent circuit transmission efficiency representing the soil resistance heating efficiency is calculated based on the negative correlation between the connectivity index and the blocking factor, and accurate quantitative evaluation of the heterogeneous soil resistance heating efficiency is achieved.

This invention provides a method for simulating buckling of subsea pipelines based on the pipeline element method, addressing the problems of low computational efficiency, complex modeling, and low accuracy in existing methods. Based on Euler-Bernoulli beam theory, this invention models the pipeline as a series of efficient pipeline elements. Internal pressure is converted into equivalent temperature rise, and the effective thermal expansion force generated by the effective temperature rise is applied to both ends of the pipeline element to construct the total potential energy equation. The second derivative of the total potential energy equation is performed to obtain the tangent stiffness matrix of the pipeline element. An updated Lagrange method is used for coordinate transformation. The secant relationship is used to calculate the pipeline element and soil resistance. A Newton-Raphson incremental-iterative numerical program is established to perform nonlinear analysis of the pipeline, progressively solving for the deformation and stress of the pipeline under complex loads. This invention significantly reduces the number of elements, improves computational efficiency, and accurately simulates nonlinear pipe-soil interactions. It is applicable to various pipelines, including short pipes, long pipes, and corroded pipes, as well as complex working conditions such as high temperature and high pressure.

The utility model discloses a termite cave detector which comprises a shell, two protective sleeves are arranged on the outer wall of the shell, and each protective sleeve is of an internal hollow structure. A central cylinder is arranged in the shell, a spring detection structure is arranged at the bottom end of the central cylinder, and a detection needle head is arranged at the bottom end of the spring detection structure; the detection needle head of the spring detection structure is used for sensing soil resistance mutation (the density of the ant cave area is reduced), mechanical signals are directly fed back, the detection result of the ant cave area is obtained, the cotton thread sensing structure is used for triggering the indicating rod by means of sinking of the gravity block after moisture absorption, humidity changes are synchronously reflected, and through humidity changes of soil near the ant cave area, the ant cave area is detected. In the detection process, electronic elements or external energy sources are not needed, and therefore the termite cave detection device is suitable for long-term use.

The present application relates to a kind of rock-socketed foundation bearing capacity compensation design method considering rock mass constraint, comprising: establishing rock-socketed foundation calculation model, determine its consolidation boundary condition in rock layer;Calculate the horizontal soil resistance of triangle distribution produced when foundation rotates;Solve the resisting moment of horizontal rock resistance to base center;The deformation of base is decomposed into integral subsidence and rotating component;Determine the calculation formula of base zero stress point position, and establish base vertical pressure distribution model;Establish the overall balance equation group, and solve the foundation rotation angle and zero stress point position by iteration calculation;Calculate the maximum compressive stress of base and evaluate the bearing capacity compensation effect;Finally, section internal force analysis and reinforcement design are carried out.The present application provides additional resisting moment by quantifying rock mass constraint, effectively reduces the maximum compressive stress of base, provides theoretical basis and technical support for improving foundation bearing capacity and optimizing foundation size, and is especially suitable for rock-socketed foundation design in high intensity seismic region.

The invention discloses an inland waterway ultra-long steel sheet pile vibration piling device, and relates to the technical field of waterway engineering, the inland waterway ultra-long steel sheet pile vibration piling device comprises a piling hammer, the bottom of the piling hammer is provided with a steel sheet pile, a physical disturbance assembly and a gas-liquid energy regulation and control assembly, and the gas-liquid energy regulation and control assembly is arranged on one side of the outer wall of the physical disturbance assembly; under cooperation of the physical disturbance assembly and the gas-liquid energy regulation and control assembly, efficient and accurate pile sinking is integrally achieved, piling operation is more stable and reliable, by means of linkage of a high-frequency sound wave generator and a soil resistance monitoring probe and cooperation of flexible adaptation of a corrugated pipe, soil around the pile can be pre-disturbed through high-frequency vibration, pile sinking resistance is reduced, and the pile sinking efficiency is improved. The posture of the pile body can be corrected in real time through dynamic adjustment of a micro hydraulic actuator and a ball hinge joint in the pile sinking process, pile body bending caused by rigid collision is avoided, and meanwhile, high-pressure jet flow and an air film can be isolated and directly reach key areas around the pile through three layers of nested nozzles and inner and outer layer pipelines of the gas-liquid energy regulation and control assembly.