376 results about "Deep excavation" patented technology

The invention discloses a settlement amount time sequence prediction method and system for deep foundation pit excavation adjacent buildings. The method comprises the steps that original monitoring data of on-site building settlement are acquired; performing data preprocessing on the obtained original monitoring data; constructing a recurrent neural network; model input and output parameters are determined through principal component analysis; optimizing the recurrent neural network based on an optimizer; performing hyper-parameter optimization based on an optimization result; performing settlement time sequence prediction by using the optimized recurrent neural network; the system comprises a data acquisition module, a preprocessing module, a model construction module, an analysis module, an optimization module, a parameter optimization module and a prediction module. By constructing the settlement prediction model, dynamic modeling and accurate prediction of the settlement trend of the building in the excavation process of each stage of the foundation pit are realized; historical settlement monitoring data and multi-layer soil body excavation information are combined, and multi-source input parameters are introduced, so that the adaptability of the model to complex working conditions is enhanced.

The invention relates to the technical field of settlement monitoring, in particular to a method for reducing differential settlement monitoring errors of a deep foundation pit, and the method comprises the steps: measuring the three-dimensional coordinate information of each monitoring point in the range of the deep foundation pit; according to the synchronization characteristic of random fluctuation of the three-dimensional coordinate information of each monitoring point in each time period, the interfered synchronization degree of each monitoring point in each time period is obtained, and according to the change characteristic of the interfered synchronization degree of each monitoring point in all time periods, the synchronous interference continuity of each monitoring point is obtained; according to the average level and the difference degree of the interference synchronization degrees of different monitoring points in the local area, the interference significant coefficient of each monitoring point is obtained, and the settlement credibility of each monitoring point is obtained by combining the synchronization interference persistence so as to extract a settlement point; and monitoring the differential settlement of the deep foundation pit according to the coordinate distribution difference condition of each settlement point in the vertical direction. The settlement monitoring precision can be improved.

The invention provides a dynamic risk prediction and optimization decision-making method and system for a deep foundation pit construction process. A deep foundation pit numerical simulation model is established, and the model is used for simulating soil mechanical behaviors and supporting system response parameters in the construction process; acquiring multi-dimensional real-time monitoring data of the foundation pit, comparing the monitoring data with a numerical simulation result, and calibrating parameters of the deep foundation pit numerical simulation model according to a comparison result; performing time series data modeling analysis on the real-time monitoring data by using a Transform algorithm, capturing possible risk modes in the construction process, and identifying potential risk signals in the data; on the basis of Transform algorithm analysis and numerical simulation feedback results, the foundation pit construction risk state is predicted in real time, and a real-time risk prediction result is obtained; and according to the prediction result, dynamically adjusting the construction scheme to complete decision optimization. According to the method, the risk management and control capability of the deep foundation pit construction process is remarkably improved, and the construction safety and efficiency are greatly improved.

The invention relates to a mountainous area road deep excavation roadbed slope monitoring method, system and terminal, and belongs to the technical field of slope monitoring, the monitoring method comprises the following steps: according to slope data of a monitoring slope needing to be monitored, gridding the monitoring slope; obtaining a change temperature difference of each grid; the grids with the change temperature difference not smaller than a set temperature difference threshold value are screened out and marked as water seepage grids; marking a seepage path according to the screened water seepage grids; obtaining the grade of a seepage area through which the seepage path flows; if the grade of the permeation area is a high permeation area, executing a first-grade early warning strategy; if the grade of the permeation area is a low permeation area, executing a secondary early warning strategy; and if the grade of the permeation area comprises both the high permeation area and the low permeation area, executing a three-level early warning strategy. The method has the beneficial effects that the damage of slope disasters caused by rainfall to the road is effectively avoided or reduced, and the traffic safety of the road is guaranteed.

The invention discloses a construction method for constructing a deep foundation pit by using an existing structure, and relates to the technical field of foundation pit construction.The construction method comprises the steps that the existing enclosure structure is positioned, a crown beam of the existing enclosure structure is chiseled away after excavation, and a fender post design scheme is confirmed; small-diameter secant piles are constructed according to the fender post design scheme, and a newly-built fender post is formed; the joint of the newly-built enclosure structure and the existing enclosure structure is reinforced; the crown beam is constructed, and the newly-built enclosure structure and the existing enclosure structure are connected; according to the excavation process, the defect position of the enclosure structure is reinforced; establishing and training a correlation model based on the water level data and the deformation data to obtain a water level deformation correlation model; and according to the real-time water level change, performing defect prediction and early warning on the enclosure structure in combination with the water level deformation correlation model, and reinforcing the defects of the enclosure structure. According to the method, the occupied area of the enclosure structure is reduced, the existing enclosure piles are repaired, and the defects of the enclosure structure can be accurately found and reinforced.

The invention relates to the technical field of deep foundation pit monitoring, and discloses a deep foundation pit micro-deformation InSAR remote sensing method and system and a storage medium. The method comprises the following steps: synchronously acquiring data through a ground radar and an InSAR satellite, and obtaining a point target set and an original scattering characteristic sequence; obtaining a net deformation phase sequence without influence through registration residual correction, phase deduction and weighted fusion processing, and carrying out phase consistency quality control and unwrapping processing to obtain an accumulated deformation quantity sequence; constructing a deformation mechanism correlation characteristic matrix based on correlation analysis of the cumulative deformation quantity sequence and radar reflection intensity amplitude attenuation characteristics; and fusing the deformation mechanism correlation feature matrix and the real-time differential interference image group, extracting deformation rate and phase gradient change, and further generating a deep foundation pit local micro-deformation risk early warning index set. According to the invention, the tiny deformation of the surrounding area of the foundation pit can be effectively detected, potential risks are warned in advance, and the safety and monitoring efficiency in the construction process are improved.

The invention discloses a foundation pit seepage-deformation space-time coupling early warning method and system based on a large geological model, and belongs to the technical field of geotechnical engineering intelligent monitoring, and the method comprises the steps: processing a regional geological survey report through the large geological model based on a Transform architecture, and generating a high-precision three-dimensional stratum parameter field; further, an improved particle finite element method is adopted to carry out dynamic coupling solution of a seepage field and a stress field, a displacement rate vector is obtained, a hybrid network space-time prediction model fused with LSTM-Transform is constructed, a composite early warning index is calculated in combination with the real-time displacement rate vector, and through multi-source data fusion and space-time coupling analysis, an early warning result is obtained. Accurate evaluation and advanced early warning of the seepage stability and the deformation state of the deep foundation pit project are achieved, the accuracy and reliability of early warning signals are remarkably improved, and the method is suitable for foundation pit safety control under complex geological conditions.

The invention belongs to the technical field of geotechnical engineering precision monitoring and calculation intelligent crossing, and discloses a deep foundation pit support pile micro-deformation capturing and predicting method and system fusing physical mechanism constraints, and the method comprises the following steps: obtaining and fusing a static physical field and a dynamic displacement field of a deep foundation pit support pile; constructing an enhanced space-time field atlas containing physical boundary conditions; constructing a micro-deformation prediction model, constructing a physical information loss function based on a support pile beam unit fourth-order differential equation, and training the micro-deformation prediction model based on the physical information loss function to obtain a trained model; and inputting the enhanced time-space field atlas into the trained model, extracting spatial morphological characteristics of pile body micro-strain in the enhanced time-space field atlas, and obtaining a support pile deformation prediction result. According to the method, the technical bottleneck of'micro-feature annihilation 'of a general model is broken through, and high-fidelity capture of micron-sized deformation is realized.

The invention belongs to the technical field of building construction, and discloses an ultra-deep foundation pit supporting device and a construction method.The supporting device comprises supporting assemblies, a lifting assembly and a control assembly, at least two sets of supporting assemblies are arranged at intervals in the depth direction of a foundation pit, and a multi-stage temporary supporting system is alternately formed in the foundation pit. Each supporting assembly serves as a formwork frame of the concrete support and temporarily supports the concrete support before the concrete support reaches the formwork removal strength, the lower layer supporting assembly provides temporary side wall supporting below the concrete support at the same time, layer-by-layer continuous excavation is achieved, waiting for the concrete strength is not needed, and the construction waiting time is shortened. According to the construction method, the liftable supporting assemblies are adopted for alternate supporting in the dry soil excavation stage and the underwater excavation stage, so that the foundation pit is in smooth transition among different working conditions. Meanwhile, after the dry soil is excavated to a certain depth, water is injected to the height of a confined water head, water pressure inside and outside the pit is balanced, confined water inrush and pit bottom upheaval are effectively prevented, and safe and continuous construction is achieved through dynamic supporting and cyclic utilization.

The invention discloses a deep and shallow well dewatering construction method for a multi-aquifer communicated stratum foundation pit. In order to solve the problems of sedimentation outside a pit and wall deformation caused by one-time pumping and descending of a traditional mixed well, a shallow well with a filter screen located in a phreatic layer and a deep well extending to a confined aquifer are arranged in a foundation pit in the construction method; measuring and setting out, exploring and digging, hole forming, hole cleaning and slurry changing, well pipe descending, filling, water stopping and well washing are sequentially completed, and then an independent pumping and descending system is formed; water level, water quantity and peripheral deformation data are obtained through a single well-group well test, and a deep well starting threshold value is determined; before the foundation pit is excavated, only a shallow well is started to drain a phreatic bed, deep well pressure reduction is started in an echelon mode after the foundation pit is excavated to the preset depth and a support is erected, and on-demand dewatering is achieved; the bottom plate construction stage is divided into three stages for well shut-in. The construction method can obviously reduce the drop amplitude of the water level outside the pit, the lateral displacement of the wall body and the ground surface settlement, has the advantages of safety, economy and environmental protection, and is suitable for coastal complex geology deep foundation pit engineering.

The invention discloses an optimization control method for the construction process of a long, large and deep foundation pit of a subway station, and relates to the technical field of foundation pit construction. Before construction, foundation pit geology and surrounding environment data are firstly obtained and analyzed to obtain a comprehensive foundation pit construction environment evaluation value, and the influence degree of foundation pit excavation is predicted according to the comprehensive foundation pit construction environment evaluation value; then, according to a prediction result, a proper optimal enclosure structure form is selected; secondly, dividing a target subway station into 10 foundation pit sub-regions, constructing an excavation sequence initial population by adopting integer coding, and analyzing a fitness evaluation value of each excavation sequence; and finally, according to the fitness evaluation value, determining the optimal excavation sequence of the target subway station. According to the method, through multi-step cooperation, a scientific and systematic optimal control scheme is provided for construction of the long, large and deep foundation pit of the subway station, and construction safety and quality can be guaranteed.

The invention belongs to the field of deep foundation pit intelligent supporting systems, and particularly relates to a deep foundation pit intelligent supporting system based on oblique beam grid and digital twinning and a collaborative construction method.The deep foundation pit intelligent supporting system based on oblique beam grid and digital twinning comprises an oblique beam grid supporting structure composed of two-way crossed steel oblique beams, and the outer layer of each steel oblique beam is a Q355B steel pipe with the thickness not smaller than 12 mm; the inclined beam is filled with ultra-high performance concrete with the compressive strength not smaller than 150 MPa, the inclination angle of the inclined beam ranges from 25 degrees to 60 degrees, and an MEMS micro-electro-mechanical system sensor is pre-buried at a node; and the digital twin platform integrates the geological BIM model and the LSTM neural network prediction model. The bending rigidity is improved through the oblique beam grid supporting structure and the concrete filled steel tube composite beam, the inclination angle ranges from 25 degrees to 60 degrees, force flow transmission is optimized, and micro-strain-level stress monitoring is achieved through the MEMS sensors embedded in the nodes. A digital twin platform and an LSTM model are fused with 12-dimensional parameters, the 72-hour deformation prediction error is smaller than or equal to 1.5 mm, and compared with a traditional experience algorithm, the precision is improved.

The invention discloses a numerical simulation analysis method for a near-river ultra-deep foundation pit under the action of seepage flow, and the method comprises the following steps: S1, constructing a three-dimensional numerical model based on finite element software PLAXIS 3D, and constructing a non-uniform stratum model in combination with a Borehole module; s2, fine modeling is conducted through the underground diaphragm wall, the reinforced concrete supports and the latticed columns; s3, simulating a small strain hardening characteristic and a rigidity attenuation effect of the soil body by adopting an HSS model; s4, simulating underground water flow by combining plastic steady-state seepage analysis, and simplifying the three-axis cement mixing pile into an underground diaphragm wall structure through an equivalent stiffness principle; and S5, step-by-step excavation and support sequential control construction procedures are adopted, and finally, the reliability of the model is verified by comparing a horizontal displacement simulation result of the diaphragm wall with field monitoring data. According to the method, the foundation pit deformation rule is predicted through HSS constitutive model and seepage coupling analysis, and the foundation pit deformation prediction precision is remarkably improved.

The invention discloses an argillaceous siltstone geological anchorage deep foundation pit construction method, which relates to the technical field of building construction, and comprises the following steps: collecting stratum structure data, hydrogeological data and surrounding environment data of an anchorage area; determining an integral foundation pit form; a supporting scheme is designed, and a supporting structure type, a construction process and safety prevention and control measures are determined; verifying the stability of the supporting structure; construction resource investment, construction period and risk assessment data of different support schemes are collected, cost-benefit comparative analysis is carried out, and an optimal construction scheme is screened; the construction state is fed back in real time; and the anti-collapse, anti-seepage and anti-disturbance construction requirements under the muddy siltstone geological scene are met. According to the deep foundation pit construction method, a deep foundation pit construction full-process solution matched with the geological scene is formed by adopting double-row secant pile supporting, a targeted cast-in-situ bored pile and anchor cable construction technology and a near-high-rise special monitoring and inner supporting optimization technology.

Disclosed in the present invention is a protection structure for a deep excavation cutting slope, the protection structure comprising: a protection plate assembly, which comprises an inner protection plate covering a slope body and an outer protection plate provided above the inner protection plate, wherein vertical sleeves distributed in a grid pattern are provided on the inner protection plate, and circular slots allowing the vertical sleeves to pass through are formed in the lower portion of the outer protection plate; a fixing assembly, which comprises a plurality of rows of anchor rods, each anchor rod comprising a threaded section matched with an internal thread and a smooth section capable of moving relative to a vertical sleeve; and an adjusting assembly, which comprises a plurality of rows of telescopic springs I, an adjusting rod connected to any row of telescopic springs I, a vertical column provided on a crest and extending into a soil mass, and a slide rail column provided on a toe, one end of the adjusting rod being connected to the vertical rod, and the other end thereof being vertically slidably connected to the slide rail column. The present invention can improve the stability of slopes, and further the protection structure can be finely adjusted in real time in response to deformation of soil masses of slopes.

The invention discloses a soft soil area vertical shaft deep foundation pit ground subsidence prediction method and device, and belongs to the field of deep foundation pit engineering. The method comprises the following steps: establishing a two-dimensional finite element model for ground surface settlement analysis under the coupling action of a seepage field and a stress field; the working condition of the model is adjusted to determine main factors affecting ground surface settlement; establishing a regression equation for predicting the maximum wall deflection caused by support excavation and an empirical equation for predicting a deformation ratio based on the main factors; training and predicting parameters in the regression equation and the empirical equation by adopting a machine learning algorithm on the basis of accumulated ground surface settlement data obtained by numerical analysis of the typical construction process of the vertical shaft; determining the maximum surface settlement based on the deflection equation and the deformation ratio equation; and based on the maximum surface subsidence, according to the outside-pit subsidence influence range and the subsidence curve form, the surface subsidence influence area around the foundation pit is partitioned, and surface subsidence is predicted. According to the method and device, the ground subsidence induced by shaft foundation pit construction can be rapidly calculated.

The invention provides a deep foundation pit monitoring method based on BIM-physical model hybrid simulation. The method comprises the steps that real-time monitoring data and BIM model parameters of a deep foundation pit are collected; inputting a first model parameter in the BIM model parameters as an initial geometric condition into the initial physical model for simulation calculation to obtain first simulation data, and verifying the first simulation data based on the real-time monitoring data to obtain a verification result index; optimizing the soil mass mechanical parameters in the initial physical model based on the verification result index until the verification result index output in the optimization process meets a preset requirement, and obtaining an optimized physical model; simulating the construction process of the deep foundation pit on the basis of the optimized physical model in combination with a second model parameter in the BIM model parameters, and outputting second simulation data; and performing monitoring and early warning on the deep foundation pit based on the deep foundation pit knowledge graph in combination with the real-time monitoring data and the second simulation data to obtain a monitoring and early warning result. According to the invention, comprehensive monitoring of the deep foundation pit is realized.

The invention relates to the technical field of data processing, and discloses a deep foundation pit monitoring data acquisition method and system. The method comprises the following steps: arranging sensors according to three depth levels of a pit top, a pit wall and a pit bottom of the deep foundation pit to obtain grouped data; calculating foundation pit deformation gradient, supporting structure stress, soil layer stability and underground water seepage parameters, and extracting space weight data; adopting a deep foundation pit space layering Gaussian hybrid clustering algorithm to screen representative monitoring sensors; inputting representative sensor data into the deep foundation pit long short-term memory network to predict foundation pit deformation; and dynamically adjusting the monitoring data acquisition frequency through game theory weight distribution and cloud model evaluation, and generating a data acquisition control instruction. The technical problems that in deep foundation pit monitoring, the data collection efficiency is low, representative sensor selection lacks scientific basis, and misjudgment is prone to occurring in single-index early warning are solved, and the intelligent level and prediction precision of deep foundation pit monitoring data collection are improved.

The invention provides a sandstone reservoir oil-water layer logging identification method and system, and belongs to the field of reservoir evaluation. According to the method, an identification plate is obtained according to oil testing and production testing data and gas logging data, and then the fluid type of a reservoir to be identified is identified through the identification plate. According to the method, a conventional gas logging technology is adopted, new technical means and measurement time do not need to be added, the fluid type of the sandstone reservoir can be simply, conveniently and rapidly recognized based on deep excavation of gas logging data, the recognition coincidence rate is increased, a basis is provided for exploration and development decision and benefit development, and the method has the advantages of being economical, real-time, accurate and the like and has good application prospects. The popularization and application prospects are wide.

The invention relates to the technical field of deep foundation pit engineering construction, in particular to a first-supporting-and-second-supporting system construction method based on back pressure soil of a deep foundation pit of a temporary operating subway, and the method comprises the following steps: aiming at the construction problem of the deep foundation pit of the temporary operating subway, forming a collaborative supporting system by reserving a back pressure soil body, a supporting pile and a top beam; layered excavation is carried out by adopting a support-first and support-second process, and a next layer is excavated after support installation and prestress application are completed; deep foundation pit backfilling and steel support layered dismantling are executed step by step along with commercial main body structure construction; after the commercial main body reaches the preset stage, integrated construction including static cutting, rigid connecting component pre-embedding for settlement prevention and middle-embedded type water-stop belt waterproofing is conducted on the subway channel; and a real-time monitoring system is combined to ensure construction safety and subway structure stability. The method can effectively balance the stability of the deep foundation pit and metro protection requirements, improves the construction efficiency, solves the problems of settlement and leakage of construction joints, and is suitable for deep foundation pit engineering close to an operating metro.

The invention belongs to the technical field of subway deep foundation pit construction in a complex environment, and particularly relates to a subway foundation pit supporting structure optimization design method based on three-dimensional finite element simulation. Comprising the steps that S1, the deformation conditions of a subway deep foundation pit adjacent bridge and the surrounding environment in the excavation stage are monitored; s2, establishing a numerical simulation model of the whole foundation pit excavation process; s3, comparing and verifying a numerical simulation result and an actual measurement result; s4, analyzing the influence of the change of the comprehensive rigidity caused by the change of each parameter on the ground surface settlement; and S5, the supporting structure combination of the excavated subway deep foundation pit is optimized. According to the method, the numerical model of the whole foundation pit excavation process is established and compared with the actually measured data result for verification, and the numerical model can well reflect the influence of subway foundation pit excavation on the surrounding environment and the adjacent bridge in the whole foundation pit excavation process.

The invention discloses a high-precision lossless milling method for shear-resistant slotting of a side wall of a hard rock stratum at the bottom of a foundation pit. The method comprises the following steps: step 1, determining a position and a side line of a shear-resistant slot on the side wall of the foundation pit; step 2, sawing a horizontal groove along the side line through a disk saw; step 3, drilling a horizontal hole in the range of the anti-shear groove, and injecting a static expanding agent for controllable pre-splitting; step 4, carrying out mechanical milling on the pre-split rock mass to form a groove body; and step 5, washing the tank body and carrying out secondary milling on the undercut part based on a measurement result so as to realize high-precision forming. According to the method, through laser positioning, guide cutting, rock presplitting, hydraulic milling, high-pressure washing and secondary re-checking, multi-stage progressive control errors are achieved, and the construction quality, efficiency, controllability and environment friendliness of hard rock section shear-resistant slotting are remarkably improved.

The invention relates to the technical field of slope reinforcing, and discloses a slope reinforcing device for deep foundation pit excavation, which comprises a base and fixing holes, the fixing holes are symmetrically formed in the inner wall of the base in a penetrating manner, an adjusting mechanism is arranged at the top of the base, and a reinforcing mechanism is arranged on the side, away from the base, of the adjusting mechanism. The adjusting mechanism comprises a driving motor fixedly connected to the upper surface of the middle of the base and a driving assembly arranged at the top of the base, the reinforcing mechanism comprises reinforcing plates symmetrically and fixedly arranged in the driving assembly, and a driving telescopic plate, a driving rotating wheel, a first adjusting rod and a second adjusting rod in the adjusting mechanism are matched; the multi-dimensional adjustment of the vertical height, the inclination angle and the horizontal unfolding length of the reinforcing mechanism can be achieved, the device can adapt to deep foundation pit slopes with different depths, inclination degrees and widths, the adaptability of the device to different foundation pit working conditions is greatly improved, reinforcing structures do not need to be customized independently for different slopes, and the construction adaptation cost is reduced.

The application provides a deep foundation pit underground continuous wall seepage repair auxiliary device, and belongs to the technical field of deep foundation pit construction, and is used for assisting in repairing the underground continuous wall body with seepage phenomenon. Since there are many uncertain factors in the construction process of the underground continuous wall and the deep foundation pit, the local seepage of the underground continuous wall may occur in the process of foundation pit excavation or after the completion of excavation. When the wall body is repaired, it is required to drill into the underground continuous wall body obliquely, and the skill level of the operator is extremely high. The seepage repair auxiliary device comprises a base, a rotating part, an extension part and a plurality of drilling parts. The extension part comprises a power assembly and a guide assembly, the drilling parts are correspondingly installed in the guide assembly, under the joint action of the guide assembly and the power assembly, the plurality of drilling parts can simultaneously drill into the seepage area of the underground continuous wall, and the drilling direction can be oblique, so that the skill requirement of the operator is reduced, the drilling quality is improved, and the seepage repair efficiency is also improved.

The utility model discloses an underground structure deep foundation pit strengthening protection structure, which relates to the technical field of deep foundation pit strengthening, and comprises a foundation pit body, baffle structures are arranged on the four sides of the inner wall of the foundation pit body in a fitting manner, and the baffle structures support the inner wall of the foundation pit body; internal corner structures are arranged at the joints of the baffle structures, and the internal corner structures are used for protecting internal corners of the foundation pit body; a supporting structure is arranged in the middle of the foundation pit body and supports the baffle structure. The internal corner structure comprises internal corner blocks, the internal corner blocks are placed at the four internal corners of the foundation pit body, two connecting grooves are formed in each internal corner block, connecting plates are fixedly connected to the outer sides of the two connecting grooves, and the internal corners in the foundation pit body can be supported and protected through the arranged internal corner structure; and the collapse phenomenon caused by water seepage at the internal corner in the foundation pit body can be avoided.

The utility model relates to the technical field of geotechnical engineering and railway construction, and particularly discloses a vibration reduction and deformation resistance steel sheet pile for deep foundation pit engineering close to an existing railway line, which comprises a steel sheet pile, a vertical load-bearing steel bar, a connecting component, a vibration isolation and reduction interlayer and a protective steel plate. By adopting a composite structure form of steel sheet piles, vibration isolation and reduction interlayers and vertical load-bearing steel bars, the structure reinforcing function and the vibration isolation function are organically combined, and a brand-new supporting structure system is formed; the vertical stressed steel bars are matched with the vibration isolation and reduction interlayer and the damping spring shock absorbers, the vertical stressed steel bars mainly share tensile stress to improve the stress state, the vibration isolation and reduction interlayer mainly absorbs vibration energy to weaken vibration transmission, and the comprehensive performance of the steel sheet pile is remarkably improved through the combined action of the vibration isolation and reduction interlayer and the damping spring shock absorbers; meanwhile, according to the scheme, by optimizing arrangement of the vertical load-bearing steel bars, selection of vibration isolation and reduction materials and arrangement of connecting components, the whole structure has the good reinforcing effect and vibration reduction performance, and construction convenience and economical efficiency are taken into consideration.

This application relates to the field of mixing equipment technology and discloses a filler mixing device for treating cracks in the water-stabilized base course of high-fill and deep-cut road sections. The device includes a tank with an opening at the bottom and a telescopic cylinder fixedly connected to the lower surface of the tank. A base plate is fixedly connected to the bottom of the telescopic cylinder. A conveying channel is fixedly and continuously connected to the bottom of the tank, and a discharge pipe is fixedly and continuously connected to the base plate. A telescopic component is provided between the tank and the base plate. A mixing mechanism is installed inside the tank. The telescopic component includes an electric push rod. This invention, by using the telescopic component, base plate, and telescopic cylinder in conjunction, allows the base plate and telescopic cylinder to form a new storage space. When filler material is added into the storage space through the conveying channel, since both the storage space and the conveying channel are located below the mixing mechanism, the addition of filler material will not impact the mixing mechanism, thus avoiding damage to the mixing mechanism.

This invention discloses a dynamic method for determining the stability of support structures in deep foundation pit construction, relating to the field of engineering structure monitoring and diagnosis technology. The method includes: collecting multi-source heterogeneous data of the deep foundation pit support structure for preprocessing to generate a complete reconstruction sequence; constructing stability labels and combining them with the complete reconstruction sequence to build training samples, constructing a master decision model, using the training samples as input to the master decision model, outputting a predicted probability distribution, and selecting a final decision label; obtaining auxiliary labels based on the final decision label, and performing label consistency determination to obtain consistent-inconsistent results; then, based on the inconsistent results, extracting predicted probabilities for penalty correction, and performing label credibility-untrustworthiness determination to obtain credible-untrustworthiness results. This invention improves the accuracy, robustness, and engineering feasibility of determining the stability of support structures.

This invention discloses a method for controlling the stability deformation of deep foundation pits, comprising the following steps: installing retaining piles, top beams, ground beams, and reinforcing beams, and establishing corresponding grid abstract models; setting pressure sensors on the fastening nodes connecting the reinforcing beams and retaining piles, and setting tensioning mechanisms between adjacent retaining piles, which are then loaded onto the grid abstract model as node spacing influencing factors; using the deep foundation pit maintenance limit data and the case of zero force as two parallel force standard surfaces according to construction site standards; forming a mesh-like force surface between the two force standard surfaces based on pressure sensor readings and position information to obtain the distance change trend between adjacent pressure sensors; and tightening each tensioning mechanism sequentially from the point of most prominent deformation outwards according to the relationship between the deformation degree of the mesh-like force surface and the lateral force on the nodes.

The utility model discloses a soft soil single-pile supporting structure for a deep foundation pit. The soft soil single-pile supporting structure comprises cast-in-place piles, corner piles and fixing blocks. The outer side face of the cast-in-place pile is an arc face and used for making contact with deep foundation pit soft soil, and the inner side face and the two side faces of the cast-in-place pile are all planes. A first assembling groove is formed in the top of the outer side face of the cast-in-place pile. A first positioning hole penetrating through the inner side face and the outer side face of the cast-in-place pile is formed in the first assembling groove. The corner pile is composed of a face A and a face B which are perpendicular to each other, and a second assembling groove is formed in the top of the outer side face of the corner pile and extends to the face B from the face A. A second positioning hole is formed in the surface A, and a third positioning hole is formed in the surface B; the fixing block is of a strip-shaped structure, and a plurality of positioning columns are arranged on the fixing block. The utility model has the beneficial effects that according to the technical scheme, the stability is enhanced by expanding the soft soil contact surface and utilizing the self-filling characteristic of the soil body; quick assembly and high connection strength are achieved through interference fit of the fixing blocks, and the device adapts to complex working conditions of soft soil; soil gravity is naturally anchored through the sunken design of the stabilizing blocks, and the inclination risk of the pile body is reduced.