775 results about "Foundation engineering" patented technology

The invention relates to the technical field of pile foundation engineering, in particular to a construction method of a long-pile wharf pile foundation lateral displacement prediction model. The method comprises the following steps that displacement, stress and load parameter monitoring is conducted on a pile foundation of the high-pile wharf, and real-time monitoring parameter data is generated; performing working condition identification on the pile foundation structure through the real-time monitoring parameter data to generate working condition data of the pile foundation structure; multi-source load characteristic analysis is conducted on the pile foundation structure working condition data, load coupling effect calculation is conducted, and load action data are generated; performing soil-pile interaction analysis according to the load action data to generate soil-pile response data; and performing material performance deterioration evaluation according to the soil-pile response data to generate material state data. The working condition identification method based on the multi-source monitoring data is established, comprehensive perception of the pile foundation structure state is achieved, and a reliable data basis is provided for subsequent displacement prediction.

The invention discloses a tubular pile reinforced composite foundation bridgehead differential settlement monitoring method and system, and belongs to the technical field of foundation treatment and foundation engineering. Comprising the following steps: acquiring soil pressure data, settlement data, displacement data and pore water pressure data of a pipe pile reinforced composite foundation bridgehead, respectively performing feature extraction, and adaptively fusing a plurality of feature extraction results by utilizing correlation to generate a fused feature vector; the fusion feature vector is processed through a trained settlement prediction model, and a settlement prediction result is obtained with spatial-temporal features as guidance; wherein the settlement prediction model comprises an adaptive residual connection LSTM network layer, a hierarchical space-time attention mechanism network layer, a full connection layer and a linear layer which are connected in sequence. Comprehensive monitoring of a complex foundation environment can be realized, and the precision of settlement prediction is improved; the problems that the settlement mechanism is not deeply considered in existing settlement monitoring, and the settlement prediction accuracy needs to be improved are solved.

The invention provides a method and system for estimating the vertical bearing capacity of a steel pipe pile, and relates to the technical field of pile foundation engineering.The method comprises the steps that a static cone penetration test is conducted on a seabed stratum needing to be arranged for a steel pipe pile foundation, experimental data are obtained and subjected to normalization processing, soil behavior types are divided, and soil layer mechanical parameters are inverted; calculating side friction resistance and end resistance of the steel pipe pile based on the soil layer mechanical parameters to obtain initial static ultimate bearing capacity; historical equivalent cyclic load experimental data of waves in the construction sea area are obtained, an equivalent cyclic load reduction coefficient, a liquefaction reduction coefficient and a time-varying corrosion reduction coefficient are constructed, and a comprehensive time-varying reduction coefficient is constructed; the initial static ultimate bearing capacity is corrected based on the comprehensive time-varying reduction coefficient, the vertical bearing capacity of the steel pipe pile in the long-term service period is predicted, and the time-varying ultimate bearing capacity is obtained; setting an evaluation threshold according to the time-varying ultimate bearing capacity, dynamically adjusting a bearing capacity grading threshold interval, and outputting a bearing capacity grading evaluation result.

The invention discloses a cyclic utilization and purification treatment system for slurry in pile foundation engineering construction. According to the invention, the purification treatment system is utilized to realize the double breakthrough of environmental friendliness and high resource efficiency in the construction process through the deep enabling of the intelligent regulation and control module. The system constructs a closed-loop management chain of the slurry life cycle by relying on full-process data perception and dynamic optimization capability. The intelligent regulation and control module captures fine changes of physical and chemical characteristics of the slurry in real time and automatically regulates the operation mode of the treatment equipment, so that the purified slurry always keeps the optimal engineering performance index, and the risk of pile body defects caused by quality fluctuation of the slurry is greatly reduced. By means of the intelligent design of the waste slurry recycling path, pollution sources in traditional construction are converted into reusable engineering materials, damage to the ecological environment caused by outward transportation and landfill of waste is remarkably reduced, and an engineering site is promoted to move towards the near-zero emission target.

The invention belongs to the technical field of electric digital data processing and foundation engineering, and discloses a method for calculating stress and displacement of a foundation pile in a soil body under the action of a pile top axial load, which comprises the following steps of: taking the pile top as an origin of coordinates, and taking the downward direction of the longitudinal axis of a pile body as a z axis; according to the basic mechanical equilibrium condition of an infinitesimal body formed by the micro-section length randomly selected in the axial direction of the pile body, the boundary condition of the force at the top end of the pile and the deformation coordination relation between the bottom end of the pile and the foundation, characteristic variables reflecting the pile body stress and displacement distribution mode are solved; and according to the basic mechanical equilibrium condition of the infinitesimal body, the boundary condition of the force at the top end of the pile and the characteristic variables, the pile body axial displacement, the pile body axial force and the pile side surface friction resistance at different depths in the axial direction of the pile body are solved. The rapid and effective method and scientific basis are provided for design calculation and analysis of the foundation pile in the soil body under the action of the axial load of the pile top, and the method has important technical method significance and engineering application value.

The invention discloses a foundation pile horizontal deformation reliability calculation method and device and electronic equipment, and belongs to the technical field of pile foundation engineering. Factors influencing horizontal deformation of the foundation pile and a simulation calculation value range of the factors are determined; designing a foundation pile horizontal deformation three-dimensional finite element numerical simulation calculation scheme based on a uniform test design method; calculating a horizontal deformation value of the foundation pile based on three-dimensional finite element numerical simulation; establishing a training sample data set and a test sample data set; establishing a foundation pile horizontal deformation agent model based on a machine learning model; establishing a limit state equation for calculating the reliability of the horizontal deformation of the foundation pile; and calculating a foundation pile horizontal deformation failure probability and a reliability index. The method has the advantages of being good in fault tolerance, high in adaptability and high in fitting and prediction precision, and the technical problem that a high-precision foundation pile deformation agent model is difficult to construct due to too many input variables is solved.

The invention relates to the technical field of offshore wind power foundation engineering, in particular to an offshore wind turbine pile group structure suitable for complex geology and a mounting method of the offshore wind turbine pile group structure. The offshore wind turbine pile group structure suitable for the complex geology comprises guide assemblies and a pile group system frame, wherein each guide assembly is composed of a steel pipe pile guide sleeve, a jacket guide sleeve and a connecting ring plate, and the pile group system frame integrates the multiple guide assemblies through a connecting frame. The modular overall pile group structure design is achieved through the pile group system frame integrating the multiple guide assemblies and the connecting frame, the fan load is dispersed to the multiple pile foundations through the pile group synergistic effect, and therefore the bearing capacity of the whole foundation is improved, the foundation can adapt to different seabed geological conditions, and the construction efficiency is improved. The development requirement of offshore wind power in a complex environment is met, efficient installation, high bearing capacity and geological adaptability optimization of the offshore wind turbine foundation are achieved, stable support is provided for an offshore wind turbine generator, the construction cost is reduced, and the construction efficiency is improved.

The invention provides a grouting geology grading and construction parameter setting method based on rock mass permeability, and relates to the technical field of foundation engineering grouting construction.The method comprises the steps that the water permeability rate, fracture parameters (the number of independent unfilled fractures, the opening degree and the filling condition), ground stress and grout rheology data of a target hole section are obtained; calculating a grouted stratum grouting index (SGI) through the water permeability rate, the fracture number, the maximum equivalent fracture opening degree and the correction coefficient; the rock splitting strength is estimated in combination with the drilling condition; whether grouting is conducted or not is judged based on the SGI value, and the grouting starting water cement ratio, the grout changing strategy, the initial pressure and the pressure increasing strategy are dynamically adjusted; the grouting pressure is designed according to the stratum splitting strength, and the grouting termination condition is set in combination with the real-time flow-pressure data. Grouting parameters are optimized through quantitative grading and real-time data, experience dependence is reduced, the construction precision and efficiency are improved, the stratum adaptability is enhanced, and the engineering quality and the material utilization rate are ensured.

The utility model belongs to the technical field of foundation engineering, particularly relates to a foundation engineering deep foundation pit supporting device, and aims to solve the problems that the supporting range is small and the danger coefficient is high in the background technology, and provides the following scheme that the foundation engineering deep foundation pit supporting device comprises supporting plates which are symmetrically distributed, and hinged plates which are symmetrically distributed are welded to the outer walls of one sides of the two supporting plates; and an internal thread sleeve is hinged between the two hinged plates. The two supporting plates can be specially used for supporting the inner wall of the foundation pit, so that the supporting plates can be attached to the inner wall of the foundation pit in the foundation pits with different widths and sizes, the supporting effect is remarkable, the supporting range is greatly widened, the butt joint structure is arranged on each supporting plate, and the supporting effect is good. The positioning blocks in the bottom frame of the upper-layer supporting plate can be directly connected into the top frame of the lower-layer supporting plate in a butt joint mode, the upper supporting plate and the lower supporting plate are connected and fixed, the supporting device can be used for the field of supporting of deep foundation pits, use is flexible, collapse of rock soil on the upper layer is avoided, and the safety coefficient is high.

The invention relates to the technical field of complex geology pile releasing construction methods based on the BIM technology, and discloses a construction method named as a complex geology pile releasing construction method based on the BIM technology. The method aims at solving the problems of design and construction disjunction, insufficient risk pre-control, low resource utilization rate and the like caused by geological information dimension reduction processing and construction process static management in the prior art. The method is characterized by comprising the following steps: constructing a multi-source heterogeneous geological information full-parameterization three-dimensional attribute body model, and carrying out integrated simulation optimization design on a single-group pile cap based on the model; and sensing construction parameters in real time to dynamically correct the geologic model, so as to generate a self-adaptive construction control instruction and high-precision lofting data. By the adoption of the technical scheme, the safety, economical efficiency and environment friendliness of pile foundation engineering can be remarkably improved.

The invention discloses a layered foundation construction optimization method based on dynamic loading and intelligent inversion, and relates to the technical field of intelligent geotechnical engineering. In order to solve the problem that comprehensive analysis and optimization design of multiple layers of soil bodies are difficult to carry out in the prior art, the invention provides the following technical scheme: the layered foundation construction optimization method based on dynamic loading and intelligent inversion is characterized by comprising the following steps: S1, applying a dynamic load on a known layer of soil body; s2, acquiring response data, including acceleration, displacement and stress, of the soil body under the action of the dynamic load through a sensor; s3, deducing the dynamic response of the lower-layer soil body by using an inversion algorithm based on the acquired response data; s4, analyzing dynamic response characteristics of each layer of soil body; and S5, optimizing the compactness and the elastic modulus of the soil layer. The method can improve the accuracy and efficiency of soil dynamic response analysis, is suitable for mechanical property optimization in complex foundation engineering, and has wide engineering application value.

The invention relates to the field of foundation engineering, and discloses a soil mass critical state-based large open caisson soil sampling control method which comprises the following steps: acquiring soil layer distribution and physical and mechanical parameters of the position of an open caisson, establishing an interaction model of an open caisson blade foot and a soil mass, calculating pressure distribution of a blade foot contact area through a finite element method, and calculating the soil mass critical state of the open caisson. Simulating the distribution condition of a soil body plastic zone and carrying out connectivity analysis; designing an open caisson soil taking construction scheme based on the analysis, wherein the scheme comprises a soil taking sequence, a soil taking depth and a plastic zone proportion index; whether the construction scheme meets the safety and stability requirements of open caisson sinking or not is judged through simulation, if the requirements are not met, soil taking parameters are adjusted, verification is conducted again till the requirements are met, accurate design and dynamic adjustment of the open caisson sinking process are achieved through dual control over the plastic zone proportion index and the connectivity index, and the construction efficiency is improved. And the safety, the stability and the reliability of construction are obviously improved.

The invention belongs to the technical field of measurement and data processing, and particularly relates to a composite foundation bearing capacity rapid detection system based on a self-adaptive variable diameter recognition algorithm, which comprises a distributed optical fiber sensing array, a foundation strain feature extraction part, a foundation dynamic coupling calculation part and a bearing capacity calculation part, the distributed sensing array comprises a plurality of optical fiber sensors which are arranged on a foundation according to an array, and three-dimensional strain field distribution is constructed; the foundation strain feature extraction part is used for constructing a foundation dynamic stiffness matrix based on three-dimensional strain field distribution; extracting variable diameter features; the foundation dynamic coupling calculation part is used for constructing a nonlinear constitutive relation according to three-dimensional strain field distribution; calculating ultimate bearing capacity; and the bearing capacity calculation part is used for calculating the current bearing capacity according to the ultimate bearing capacity. According to the method, the detection precision and efficiency can be improved, the adaptability to complex working conditions is enhanced, and the safety and reliability of foundation engineering are remarkably improved.

The invention relates to the technical field of sludge treatment, and discloses an efficient foundation sludge treatment device for foundation engineering, which comprises a treatment cylinder, a feeding hole is formed in the outer wall of the treatment cylinder, a feeding hopper is arranged on the outer wall of the feeding hole, a rotating shaft is rotatably connected to the top of the treatment cylinder, and an operating mechanism is arranged at the top end of the rotating shaft; and the bottom end of the rotating shaft is fixedly connected with a hollow cylinder, a rotating ring is arranged outside the hollow cylinder, the rotating ring is rotationally connected to the inner wall of the treatment cylinder in a sealed mode, and four partition plates are fixedly connected between the inner wall of the rotating ring and the outer wall of the hollow cylinder at equal intervals. By arranging the fan-shaped filter plate, sludge can be filtered, impurity particles contained in the sludge can be treated, the situation that blockage is caused by the impurity particles in the subsequent sludge dewatering process is avoided, meanwhile, the fan-shaped filter plate can be automatically replaced, the replaced fan-shaped filter plate can be cleaned, manual shutdown, disassembly and cleaning are not needed, and the working efficiency is improved. And the working efficiency is greatly improved.

The invention belongs to the technical field of geological research, and particularly discloses a rainfall infiltration induced loess high fill humidifying settlement prediction method which comprises the following steps: S1, acquiring mechanical property parameters of a soil body under different compaction degrees, and fitting the mechanical property parameters under different compaction degrees and different moisture contents to obtain a fitting function; s2, on the basis of an unsaturated loess fluid-solid coupling analysis principle, transforming the fitting function to obtain a soil body humidification interpolation function under different compaction degrees and different water contents; s3, through Comsol finite element software, the interpolation function is embedded into the soil elastic-plastic constitutive model, and the weakening process of soil strength parameters along with soil humidifying deformation is simulated. By the adoption of the method for predicting the rainfall infiltration induced loess high-fill humidifying settlement, the problem that a loess high-fill foundation cannot be subjected to systematic humidifying settlement prediction aiming at rainfall is solved, and safety guarantee is provided for high-fill foundation engineering.

The present invention relates to the technical field of pile foundation engineering, and particularly to a method for constructing a prediction model for the lateral displacement of pile foundations in high-piled wharves. The method includes the following steps: monitoring the displacement, stress, and load parameters of the pile foundations in high-piled wharves to generate real-time monitoring parameter data; identifying the working conditions of the pile foundation structures through the real-time monitoring parameter data to generate pile foundation structure working condition data; analyzing the multi-source load characteristics of the pile foundation structure working condition data and calculating the load coupling effect to generate load action data; performing soil-pile interaction analysis based on the load action data to generate soil-pile response data; and evaluating the deterioration of material properties based on the soil-pile response data to generate material state data. The present invention establishes a working condition identification method based on multi-source monitoring data, realizes the comprehensive perception of the state of the pile foundation structure, and provides a reliable data basis for subsequent displacement prediction.

The invention particularly discloses a rock-soil body interface torsional shear characteristic and toughness parameter unit body test device which comprises a unit body sample blank manufacturing device, a centering device, a special drilling tool, a rib body and a torque load.The rock-soil body interface torsional shear characteristic and toughness parameter unit body test device has the beneficial effects that traditional direct shear / drawing shear is replaced with torsional shear loading; the problem that the interface contact area is reduced in the shearing process is thoroughly solved, it is ensured that the interface contact area of an anchor / pile and a rock-soil body is constant, a pressure water bag is arranged at the top of a test box unit body, the original overlying and confining pressure environment of a stratum is accurately simulated, a test anchor hole / pile hole is directly manufactured through a drilling technology, and the natural roughness characteristic of the hole wall is reserved to the maximum extent; the smooth wall surface limitation of traditional mold pore forming is broken through, the basic toughness concept of the anchor / pile-rock-soil body interface is defined for the first time, the nature of the basic toughness can be quantitatively represented by the robustness of the shear resistance of the interface, a matched toughness testing technology and evaluation method are developed, and a theoretical model and a calculation tool are provided for the toughness design of anchoring engineering and pile foundation engineering.

The invention belongs to the technical field of power transmission line foundation engineering, and particularly relates to a spiral anchor and FRP intelligent anchor rod composite foundation structure and a manufacturing method. The structure comprises a spiral anchor, an FRP intelligent anchor rod and a connecting sleeve, the FRP intelligent anchor rod is divided into an upper-section anchor rod and a lower-section anchor rod, and FBG optical fibers are arranged on the upper-section anchor rod and the lower-section anchor rod for real-time monitoring. The spiral anchor is suitable for a soft soil layer, the FRP intelligent anchor rod is suitable for a hard rock layer, and high-strength anchoring is achieved through grouting. The connecting sleeve is connected with the spiral anchor and the FRP anchor rod through threads, and the connecting force and durability are enhanced. The manufacturing method comprises the working procedures of screwing the spiral anchor in soil, drilling holes in rock, grouting the anchor rod, monitoring the optical fiber and the like, large-area excavation is not needed, efficiency is improved, and environmental damage is reduced. The structure has the advantages of light weight, high strength, corrosion resistance, real-time stress deformation monitoring and the like, and is suitable for power transmission line infrastructure construction of complex soil-rock composite strata.

The invention relates to a construction method for a roadbed penetrating through a V-shaped valley area, and belongs to the technical field of foundation engineering and foundation treatment. The problems of low foundation drainage efficiency, filling side slope instability and differential settlement control in V-shaped valley roadbed construction are solved. According to the technical scheme, a groove is dug along the bottom of a valley, a gravel drainage blind ditch wrapped by permeable geotextile is laid, and a foundation drainage system is formed; during layered filling, a vibratory roller with a piezoelectric sensor embedded into a steel wheel is adopted; after every two layers are filled, one-way geogrids are laid along the slope and vertically anchored into the compaction layer through U-shaped anchoring parts; a transverse drainage pipe is pre-buried when filling is conducted to a foundation bearing capacity sudden change point threshold value; and after filling is completed, a settlement monitoring array is arranged. According to the method, through system integration of foundation drainage structure optimization, filling body intelligent compaction and differential settlement dynamic treatment, the bearing stability of the fill roadbed under the complex terrain is remarkably improved, and the method is suitable for foundation construction and disaster prevention and control of the V-shaped canyon section of the mountain road.

The utility model relates to the technical field of pile foundation engineering, in particular to an offshore wind power steel pipe composite pile foundation synchronous and rapid construction system which comprises a self-elevating platform, the self-elevating platform comprises a supporting column and a platform, the bottom of the supporting column is arranged on the seabed, and the platform is supported by the supporting column. A plurality of steel pipe composite pile construction hole sites are formed in the platform, a rack with a rotary power head is arranged at each steel pipe composite pile construction hole site, and the racks are connected with steel pipes of steel pipe composite piles. The utility model has the advantages that: a plurality of steel pipe piles are adopted, stirring sinking is carried out simultaneously, the construction speed is high, steel pipe sinking, concrete pouring in the steel pipes, bearing platform construction and truss construction can be carried out in stages in a plurality of wind power foundations, and the overall construction efficiency is improved.

The invention relates to the technical field of building construction, and discloses a house building foundation engineering construction device which comprises a multi-shaft pile driver body, a power integration box is installed on one side of the multi-shaft pile driver body in a limiting and sliding mode, and a plurality of stirring piles are rotatably installed at the output end of the power integration box; driving gears are fixedly mounted on the outer sides of the top ends of the stirring piles, the multiple driving gears are in meshing transmission, and mounting cavities formed in the inner side walls of the driving gears are further included. The connecting strength between the mixing pile and the driving gears is changed through coincidence or dislocation between the permanent magnet plates and the magnetism isolating plates, so that the probability that the mixing pile is damaged when the bottom end of the mixing pile encounters a hard obstacle is reduced, and the situation that a plurality of driving gears bear extra load and impact due to mutual meshing is avoided; the driving gear and the power system are protected, the service life of the multi-shaft pile driver body is prolonged, the influence of hard obstacles on the construction progress is reduced, and the construction progress and the engineering quality of the sealing wall are improved.

The invention relates to an assembly type micro pile foundation for power transmission line engineering. The assembly type micro pile foundation comprises a first connecting main body, a second connecting main body and micro piles which form a square bearing platform. The first connecting body is a cube with a rectangular groove in the middle and is composed of two identical parts. The second connecting main body is a cube with four bolt holes, and the second connecting main body and the square groove in the middle of the first connecting main body are mutually embedded and spliced. The third connecting main body is a tower foot and is arranged above the second connecting main body, bolt holes in the third connecting main body correspond to bolt holes in the second connecting main body, and the first connecting main body, the second connecting main body and the third connecting main body are fixedly connected through embedded bolts and nuts. The fabricated power transmission line miniature pile foundation is prefabricated in a factory and spliced and assembled on site, the transportation size is small, construction is easy and convenient, the influence on the environment is small, manpower and material resources are saved, transportation is convenient, and full-mechanical construction of power transmission line foundation engineering is achieved.

The invention relates to the field of civil engineering, and provides a bearing capacity determination method based on special-shaped pile bearing character analysis, which comprises the following steps: firstly, obtaining stress distribution diagrams of two types of pile bodies under the same load, extracting spatial characteristics of the stress distribution diagrams, and calculating differential characteristics; and then characteristic significant enhancement is used for conducting enhanced recognition on a specific stress concentration area of the special-shaped pile in the difference graph so as to quantify nonlinear mechanical response, then space significant differences are mapped into dynamic correction coefficients of friction resistance and end resistance through characteristic decoding, and finally correction of the ultimate bearing capacity of the special-shaped pile is completed in combination with bearing capacity data of a standard pile. Therefore, the frictional resistance distribution dynamic change and end resistance multi-peak concentration phenomena caused by geometric asymmetry of the pile body can be accurately captured, meanwhile, the correction parameter optimization efficiency under the complex working condition can be remarkably improved, and the core demands of new energy pile foundation engineering for material saving and high reliability can be met.

The invention belongs to the technical field of trackless mining preparation drift type filling mining, and discloses a steeply inclined thin ore body segmentation-free roadway mining method, which comprises the following steps of space partitioning and foundation engineering construction; stoping and filling in layers; a slope coping channel for trackless mining and transportation equipment to pass through is formed on an upward layered bottom plate on the top of the connection roadway of the lower stope through the blasting technology, the slope coping channel communicates with the segmented winze through the short connection roadway, and ore removal is conducted through the segmented winze; and entering the previous layer through the coping channel, and repeating the steps of stoping and filling the layer and constructing the coping channel until the mining is finished. A slope channel is formed by blasting at the top of a layered stope joint roadway, an upper layer of mine field is communicated with a draw shaft and a ventilation shaft of an upper section, and the sectional draw shafts are combined with the collaborative layout of top and bottom stage haulage drifts and ore loading transverse drifts, so that the beneficial effect that the whole accurate mining work amount is obviously reduced is achieved.

The utility model relates to the technical field of pile foundation positioning, and discloses a pile foundation positioning anti-deviation device for pile foundation engineering, two sides of a positioning plate are symmetrically provided with stabilizing mechanisms, each stabilizing mechanism comprises a mounting plate clamped on two sides of the positioning plate, the upper surface of each mounting plate is integrally provided with a stabilizing plate, and the stabilizing plates are connected with the positioning plate. Fixing sleeves are symmetrically mounted on one side of the mounting plate, and stabilizing rods are rotationally mounted at the lower ends of the fixing sleeves; and a first positioning anti-deviation sleeve and a second positioning anti-deviation sleeve are respectively arranged above the positioning plate from left to right. Through the arrangement of a stabilizing mechanism, after positioning pins symmetrically arranged on one side of a mounting plate are embedded into positioning holes, the mounting plate can be mounted, the stability of the positioning plate can be improved through a stabilizing plate, and meanwhile, a stabilizing rod is rotated so that the stabilizing rod can move downwards in a fixing sleeve to be inserted into the ground; in this way, the stability of the positioning plate can be improved, and follow-up positioning and deviation prevention work can be conveniently conducted on a pile foundation of a pile foundation project.

The invention belongs to the field of building and foundation engineering, and discloses a tubular pile vertical bearing capacity prediction method based on deep learning. The detection precision of the vertical bearing capacity of the prestressed concrete pipe pile is improved. A convolutional neural network (CNN) and a long short-term memory network (LSTM) are introduced, sensor monitoring data and field test results are combined, a pile foundation bearing capacity prediction model is optimized, and the pile foundation bearing capacity is evaluated more accurately.

The invention relates to the technical field of foundation engineering, in particular to a visual grouting quality online evaluation and self-correction system and method.The visual grouting quality online evaluation and self-correction system comprises a data acquisition module integrating various sensors; the data processing module is used for generating standardized grouting process data from the sensor data; the state analysis module evaluates the standardized data in real time by using a preset atlas analysis algorithm and an expert rule base, and identifies the grouting state and the quality condition; the geological information module generates a geological response map for auxiliary evaluation and control decision making; and the control execution module adjusts the operation parameters of the grouting equipment according to the evaluation result output by the state analysis module, and the operation parameters comprise valve opening and closing, the slurry flow speed and the grouting sequence, so that self-adaptive deviation correction control in the grouting process is achieved. According to the method, under-grouting, over-grouting and abnormal grout escape can be effectively avoided, grouting uniformity and construction quality are improved, manual intervention and misjudgment risks are reduced, and safety, efficiency and engineering reliability of grouting operation are remarkably improved.

The invention relates to the technical field of foundation engineering, in particular to a mixed tower fan foundation formwork erecting structure and method.The erecting structure comprises a tensioning chamber standing formwork, a tensioning anchoring end bottom formwork, an upper inner formwork, an outer formwork, a tensioning chamber formwork supporting system, a foundation upper inner formwork supporting system and an outer formwork supporting system; the tensioning chamber formwork supporting system comprises vertical rod supports located on the periphery and the center respectively, radial supporting vertical rods are installed on the tops of the vertical rod supports located on the periphery, cross rod supports are installed on the tops of the radial supporting vertical rods, and ring beam radial supporting cross rods used for supporting a tensioning anchoring end bottom die are installed on the tops of the cross rod supports. A center column is installed at the top of the vertical rod support located in the center, a radial horizontal supporting rod is transversely supported on the center column, and a vertical mold support used for supporting a stretching chamber vertical mold is installed at the end of the radial horizontal supporting rod. The foundation upper inner mold supporting system comprises an inner annular steel beam. The supporting structure assists in one-time forming of concrete pouring, and the overall construction quality is guaranteed.

The invention relates to a tubular pile vertical bearing capacity probability analysis method considering the non-uniformity characteristic of a soil body, belongs to the technical field of tubular pile foundation engineering, describes site soil body mechanical parameters by introducing a random field theory, and fully considers the randomness and spatial distribution characteristics of the soil body mechanical parameters. The method comprises the following steps: acquiring a data set of tubular pile size parameters and site soil mechanical parameters, calculating related statistical parameters and a spatial weight matrix, constructing multiple groups of site soil mechanical parameter random fields, calculating the vertical bearing capacity of each group of corresponding tubular piles one by one, and obtaining statistical distribution characteristics of the tubular piles; in this way, the defects of a traditional method in the aspect of considering randomness of mechanical parameters of a soil body are effectively overcome, a new way is provided for accurate evaluation of the vertical bearing capacity of the tubular pile, engineering design and construction can be more reliably served, and the safety and reliability of engineering are improved.

This invention relates to the field of soft soil pile foundation engineering technology, specifically to a photovoltaic pile foundation with FRP-steel honeycomb web and a construction method for solidifying a soft soil bearing layer. The pile foundation includes an FRP-steel honeycomb web photovoltaic pile foundation and a solidified soft soil bearing layer. The bottom of the FRP-steel honeycomb web photovoltaic pile foundation is located in the solidified soft soil bearing layer, and its top is located above the ground. The FRP-steel honeycomb web photovoltaic pile foundation includes a core mold, concrete, and a fiber-wound layer. The core mold includes a cross-shaped steel column and an FRP sleeve. Through holes are provided on the web of the cross-shaped steel column and on the two straight plates of the FRP sleeve. The FRP sleeve is fixed between two adjacent webs of the cross-shaped steel column. The number and position of the through holes on each straight plate of the FRP sleeve correspond to the number of through holes on the web of the corresponding cross-shaped steel column. Concrete is poured inside the FRP sleeve, and the fiber-wound layer is located on the outside of the core mold. This invention reduces the weight and cost of the photovoltaic pile foundation and improves its durability and stability in soft soil areas.