17 results about "Soil arching" patented technology

The present application relates to the field of civil engineering and computer-aided design technology, and particularly relates to a method for determining non-limiting active earth pressure of a retaining wall in complex terrain. The method comprises the following steps: obtaining and spatially discretizing original survey data to form a set of parameterized grid points; constructing a reference pressure grid using the set of parameterized grid points; extracting elevation information of each grid element in the reference pressure grid, locally fitting the elevation information to a surface, and calculating the principal curvatures of the terrain surface to form a terrain curvature spectrum; analyzing the curvature distribution of the curvature characteristic region in the terrain curvature spectrum to obtain statistical characteristics of the curvature distribution; and analyzing the soil arching effect according to the statistical characteristics of the curvature distribution to obtain soil arching curvature influence law data. The present application converts complex three-dimensional boundary conditions that are difficult to handle into an accurately quantifiable terrain curvature spectrum, thereby improving the safety and economy of retaining wall design under complex terrain conditions.

The application discloses a soil arching effect degradation rate prediction method based on a stratum characteristic curve, and aims at solving the problem that the soil arching effect degradation caused by double-line tunnel excavation is difficult to quantitatively characterize. S1, discrete and parameter vectorization are carried out on the monitoring data of the double active door test; S2, an analytical expression of the stratum characteristic curve above the left and right active doors is constructed, and initial boundary conditions and limit stable boundary conditions are determined; S3, a physical guide neural network is constructed, the network parameter iterative optimization is guided through a comprehensive loss function, and optimal fitting parameters and an optimal analytical expression of the stratum characteristic curve are output; S4, the soil arching effect degradation rate η is calculated and constructed, and the quantitative prediction of the degradation degree is completed. The dual guarantee of data fitting accuracy and physical interpretability is realized, and the non-dimensional index of the output degradation rate fills the blank of the unified quantitative index of the soil arching effect degradation under secondary unloading, and can serve the stratum disturbance risk assessment and safety control of the double-line tunnel underpass project.

The application provides a waste concrete sleeper roadbed reinforced combined structure based on waste concrete sleepers, which comprises waste concrete sleepers provided with through holes at two ends, and comprises a plurality of strip structure units laid in parallel, wherein the strip structure unit comprises superposed upper layer structures and lower layer structures, the upper layer structure comprises upper layer structure units connected in a head-to-tail mode, the lower layer structure comprises lower layer structure units connected in a head-to-tail mode, the upper layer structure unit is connected with the lower layer structure unit through a connecting piece one, and the strip structure units are connected through connecting pieces two; and the application also provides a design method of the waste concrete sleeper roadbed, wherein the soil arching effect can be formed when the soil covering thickness is greater than or equal to 1.6 m and the optimal soil covering filler strength is that the internal friction angle is greater than 25 DEG and the cohesion is 8 kPa, and the soil arching effect is beneficial to be formed when the length of the waste concrete sleeper is 2.6 m and the spacing between the sleepers is 1.5 m-2.0 m.

The invention relates to the technical field of intelligent tests of geotechnical engineering, in particular to a physical effect co-evolution analysis method and system for a pile-supported reinforced embankment, and the method comprises the following steps: fitting the pile-supported reinforced embankment through a model box, a soil body sample and a reinforced material, and constructing a test condition; performing multi-modal data acquisition by using the sensor array to obtain a multi-source test data set; performing data preprocessing and feature extraction to obtain a soil arching effect feature set and a tensile membrane effect feature set; constructing a machine learning model, and obtaining a machine learning training model through the model training data; and obtaining a to-be-analyzed physical effect feature set, and obtaining a physical effect co-evolution analysis result in combination with the machine learning training model. Controllable simulation of the soil arching effect degradation and tensile membrane effect enhancement process is achieved, quantitative evaluation is conducted on structure stress and deformation response under different reinforcement rigidity conditions, and a test and prediction basis is provided for reasonable selection and optimal design of a reinforcement material.

This invention relates to the field of intelligent testing technology in geotechnical engineering, and in particular to a method and system for the co-evolution analysis of physical effects in pile-supported reinforced embankments. The method includes the following steps: fitting a pile-supported reinforced embankment using a model box, soil samples, and reinforcing materials to construct test conditions; acquiring multi-source test datasets through multi-modal data acquisition using a sensor array; performing data preprocessing and feature extraction to obtain soil arching effect feature sets and tensile membrane effect feature sets; constructing a machine learning model and obtaining a machine learning training model using model training data; acquiring the physical effect feature set to be analyzed, and combining it with the machine learning training model to obtain the co-evolution analysis results of physical effects. This invention enables controllable simulation of the degradation of soil arching effect and the enhancement of tensile membrane effect, and provides a quantitative evaluation of the structural stress and deformation response under different reinforcement stiffness conditions, offering experimental and predictive basis for the rational selection and optimized design of reinforcement materials.

The invention provides a longitudinal non-uniform deformation calculation method and system for a corrugated steel plate supporting structure, and belongs to the technical field of traffic infrastructure structural design. Comprising the steps that an orthotropic equivalent stiffness model of a corrugated steel plate is constructed, a corrugated steel plate supporting structure is equivalent to a Timoshenko beam, and equivalent section bending stiffness and equivalent section shear stiffness are calculated; the method comprises the following steps: by constructing a calculation model of longitudinal non-uniform deformation, determining longitudinal differential load distribution according to an actual soil covering condition and a soil arching effect above a corrugated steel plate supporting structure; and calculating the longitudinal difference load distribution based on the longitudinal non-uniform deformation calculation model to obtain the longitudinal non-uniform deformation of the corrugated steel plate supporting structure. According to the method, the longitudinal non-uniform deformation of the shallow-buried corrugated steel plate supporting structure can be effectively and rapidly evaluated.

The application discloses an interface soil pressure detection equipment and method based on a stress ring, and the pressure gauge comprises an outer protective cover, an upper bearing plate, an upper supporting plate, a fixed plate, an elongated rod, a stress ring, a supporting ring, a lower supporting plate, a lower bearing plate and a one-way hinge, wherein the outer protective cover is a protective cover used when the interface soil pressure detection equipment is used, damage of the pressure gauge is reduced, pressure is borne by the upper bearing plate and the lower bearing plate, measurement is performed through deformation of the stress ring in the middle of the interface soil pressure detection equipment, the one-way hinge is used for converting pressure of the upper bearing plate into a resultant force and uniformly transmitting the resultant force to the stress ring, the soil arching effect caused by the fact that the pressure film is depressed below the pressure gauge shell is avoided by guaranteeing flatness and a large surface area of the upper bearing plate. The application constructs a multi-stage decoupling interface stress transmission and sensing architecture, realizes complete immunity to bending moment and shear interference, and fundamentally solves the technical problem that the traditional pressure gauge fails due to eccentric load and soil effect.

The invention discloses a soil pressure-strain-temperature fiber bragg grating sensor for a soil arching effect of transparent soil and a distributed monitoring system. The soil pressure-strain-temperature fiber bragg grating sensor and the distributed monitoring system are used in a spring movable door soil arching effect transparency model test device. In the monitoring system, a plurality of gratings with different reflection center wavelengths are inscribed in an optical fiber in an optical fiber grating sensing array at intervals, and the plurality of gratings are packaged in a packaging shell. The packaging shell comprises a packaging shell I, a packaging shell II, a packaging shell III and a packaging shell IV. When the optical gratings are packaged in the packaging shells I, II, III and IV, the optical gratings are used as different sensors respectively. Compared with a traditional soil pressure sensor and a strain gauge, the volume is smaller, and the influence on a soil body is reduced; meanwhile, the optical fiber grating sensor is used in series connection, multiple point positions and multiple physical quantity data can be measured only through one optical fiber, the optical fiber grating has high electromagnetic signal interference resistance, and the problems that a traditional sensor is complex in circuit and prone to being affected by electromagnetic interference, and data are affected are solved.

The invention relates to the technical field of slope engineering test devices, and provides an experimental device and method for studying the soil arching effect of an anti-slide pile. Two model boxes of the experimental device are arranged on the two sides of a loading system, and the bottom of each model box is provided with a model pile through a flange connecting plate and a flange plate; therefore, the flange connecting plates can be quickly replaced according to different pile distance conditions to achieve pile distance adjustment. The loading system comprises a loading testing machine, a spherical pressure head, a distribution beam, an electric control telescopic device, a loading plate, a control system and a force sensor; the two model boxes are loaded synchronously, the control system monitors vertical loads on the two sides through the force sensor, the electric control telescopic device is controlled to adjust the telescopic amount according to the force value difference, and the loading error is kept within a preset error. The data monitoring system comprises a resistance strain gauge, a displacement meter, a soil pressure box and a data acquisition instrument, and can obtain parameters of pile body strain, pile top displacement, soil deformation and soil pressure. By adopting the method of the device, the interaction between the slide-resistant pile and the soil body and the soil arching effect rule under different working conditions can be simulated.

The application discloses a tunnel excavation face limit support force calculation method based on a whole analysis method, and comprises the following steps: step 1: a limit support force calculation model of an excavation face is proposed based on the whole analysis method; step 2: according to the theoretical model, a calculation formula of the limit support force of a shield excavation face is derived; and step 3: a corresponding loose zone model of a shield tunnel damage is proposed, wherein the model comprises a shallow-buried shield tunnel damage model and a deep-buried shield tunnel damage model. The whole analysis method is applied to the excavation face stability problem, and a calculation model of the excavation face stability is established. According to the tunnel deep and shallow burying, an elliptic cylinder-type general arch model considering the soil arching effect is established. The limit support force obtained by the application presents a consistent development trend with the numerical simulation and the existing theoretical results. In addition, the calculation time of the analytical solution is far less than the calculation time of the numerical simulation, and a new idea is provided for the design of the limit support force of the excavation face.

The invention discloses a portal type anti-sliding pile for a soft soil foundation, a causeway and a construction method of the causeway. The anti-sliding pile structure comprises a portal structure, front-row anti-sliding piles and rear-row anti-sliding piles, the portal structure is located on the outer side of the causeway, and the front-row anti-sliding piles and the rear-row anti-sliding piles are arranged on the lower surface of the portal structure to form a space stress system. The causeway structure further comprises a causeway foot structure, a causeway body structure and an upper structure, and an overall anti-sliding and deformation control system is formed. The construction method comprises the steps of early-stage design, foundation treatment, pile foundation and portal construction, monitoring equipment arrangement, embankment body structure construction and the like. Soil pressure is transmitted to the anti-sliding piles through the soil arching effect, landslide thrust is dispersed through the portal structure, the overall stability and the anti-sliding capacity of the soft soil foundation are remarkably improved, meanwhile, good drainage performance, deformation coordination capacity and construction monitoring convenience are achieved, and the structure is suitable for causeway projects with the limited space, the soft foundation and the high stability requirement.

The invention discloses a method for correcting a tunnel load of an aeolian sand stratum, belongs to the technical field of tunnel engineering support, and solves the problems that an existing calculation method is difficult to accurately reflect a real load distribution rule of the aeolian sand stratum and the calculation result is relatively large in deviation. The method comprises the steps of establishing a vertical stress calculation model considering the incomplete soil arching effect in an aeolian sand stratum, establishing a calculation formula of a span influence coefficient, establishing a calculation formula of a surrounding rock level influence coefficient, comprehensively considering the influence of the surrounding rock level and the tunnel span, and calculating the surrounding rock level influence coefficient based on multiple linear regression analysis. Establishing a final calculation formula of the wind-blown sand stratum tunnel surrounding rock load; according to the method, the wind-blown sand stratum tunnel load correction calculation method considering the surrounding rock level and span is established on the basis of the novel method theory, quantitative load solving based on the special physical characteristics of the wind-blown sand stratum is achieved, and a key technical support is provided for promoting scientific design and risk prevention and control of a wind-blown sand tunnel supporting structure.

This invention provides a method and apparatus for determining seismic design information of anchored sheet pile walls, which can be applied to the field of geotechnical engineering. The method includes: obtaining stiffness correction coefficients for multiple seismic earth pressure information based on the relative stiffness information between the sheet pile wall and adjacent soil; dividing the sheet pile wall into multiple continuous segments with stress characteristics along the height direction based on the peak stress value indicating stress concentration due to soil arching effect at the upper part of the sheet pile wall, the inflection point between the stress concentration zone and stress reduction zone of the sheet pile wall, the stiffness correction coefficients, and multiple seismic earth pressure information; combining the earth pressure gradient values ​​of each segment as a function of height to obtain an earth pressure gradient array characterizing the distribution of the wall along the height direction; and determining the design value of the anchor tension for reinforcing the sheet pile wall and the design value of the earth pressure mobilization depth in the passive zone at the bottom of the sheet pile wall based on the earth pressure gradient array and the equilibrium function.

The invention discloses a multi-source temperature control and graded reinforcement anti-slide pile reinforcement system for an unsaturated soil slope, and belongs to the technical field of geotechnical engineering slope reinforcement and green clean energy. The system comprises an expanded-base anti-slide pile, a geothermal heat pump circulating system, a solar heat collecting system and a monitoring system. The expanded-base anti-slide pile is arranged in a potential sliding surface area of the side slope, and a heat exchange pipe of the geothermal heat pump circulating system goes deep into a geothermal layer; the solar heat collection system is used for converting solar energy into heat energy to be stored as a supplementary heat source of the geothermal heat pump circulation system; the monitoring system monitors the slope state and adjusts temperature control parameters in real time. According to the system, the states of the anti-slide pile and the soil body around the pile are actively controlled and adjusted through clean energy, the temperature phase-change material is changed by controlling the temperature according to thrust transmitted by the soil arching effect of different depths so that reverse thrust can be provided for the soil body in a graded mode, and the soil arching effect is effectively maintained and enhanced; and a pile-soil common anti-sliding system with the cooperation of pile sliding resistance and soil arching is formed.

This invention proposes a method and system for calculating longitudinal uneven deformation of corrugated steel plate support structures, belonging to the field of transportation infrastructure structural design technology. The method includes: constructing an orthotropic equivalent stiffness model of the corrugated steel plate, treating the corrugated steel plate support structure as an equivalent Timoshenko beam, and calculating the equivalent section bending stiffness and equivalent section shear stiffness; constructing a calculation model for longitudinal uneven deformation, determining the longitudinal differential load distribution based on the actual soil cover conditions and soil arching effect above the corrugated steel plate support structure; and calculating the longitudinal differential load distribution based on the longitudinal uneven deformation calculation model to obtain the longitudinal uneven deformation of the corrugated steel plate support structure. This invention enables effective and rapid assessment of the longitudinal uneven deformation of shallow-buried corrugated steel plate support structures.

The invention belongs to the field of municipal engineering, and provides a road-bridge transition section capsule arrangement optimization method considering a soil arching effect, which comprises the following steps: determining geological conditions, design parameters and a settlement control target of a road-bridge transition section, establishing a finite element model of the road-bridge transition section according to the geological conditions and the design parameters, and calculating the settlement control target of the road-bridge transition section. The settlement characteristic of the road and bridge transition section under the traffic load effect is simulated, in the finite element model, a plurality of capsule arrangement schemes are preset, and the arrangement depths, intervals and grouting amounts of capsules in all the schemes are different; according to the method, the bag body arrangement of the road and bridge transition section is optimized by considering the soil arching effect, the optimal bag body arrangement scheme is screened out through finite element simulation, the optimal proportion range of the bag body distance and the embankment height is determined, the self-bearing capacity of the soil body is fully exerted, and settlement deformation is effectively controlled; and meanwhile, a high-performance grouting material with a customized ratio is researched and developed, so that the grouting material has good flowability and later strength, and the supporting and durability requirements after the capsule body is expanded are met.

The invention relates to an internal force calculation method for a circular homogeneous pipe-jacking tunnel under the action of ground unbalance loading, and the method comprises the steps: firstly converting ground single-side pile load and traffic load into equivalent horizontal unbalance pressure based on a space soil arching effect and a foundation pit single-side unbalance loading model; then, a combination model is established by superposing traditional uniformly distributed loads; then, according to a 120-degree soil arc bearing angle internal force coefficient method, the bending moment and the axial force are calculated, and two kinds of load combinations of strength and deformation checking calculation are completed; and finally, circumferential reinforcement is completed according to the pure bending section and the bending section. The method fills the design blank of the unbalance loading working condition, has simplicity and engineering precision, can guarantee long-term stability of the pipe jacking tunnel under the influence of unbalance loading, and is suitable for rapid and accurate design of engineering.