202 results about "Deep excavation" patented technology

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 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 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.

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 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 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 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.

The invention relates to a dynamic real-time optimization construction method for an ultra-large deep foundation pit of an asymmetric excavation zero-distance close existing underground structure. The dynamic real-time optimization construction method comprises the following steps that S10, the foundation pit is divided into a central area and a peripheral area on the two sides of the existing underground structure; s20, foundation pit construction is conducted according to the first construction scheme, and meanwhile stress deformation of the existing underground structure is monitored in real time; s30, constructing a numerical model, and performing numerical simulation inversion analysis on the first construction scheme to verify the accuracy of the model; s40, multiple groups of second construction schemes are constructed; s50, a foundation pit vertical construction scheme is determined; s60, multiple groups of third construction schemes are constructed; s70, a foundation pit transverse construction scheme is determined; and S80, according to the vertical construction scheme and the transverse construction scheme of the foundation pit, the three-dimensional warehouse dividing sequence is determined, and the two center area warehouse blocks and the six peripheral area warehouse blocks are constructed in an asymmetric staggered joint warehouse jumping mode. According to the method, the technical blank of zero-distance proximity construction under the working condition that the depths of the two sides are different can be filled up, and design parameters and construction method selections are provided for similar projects.

The invention provides a steel sheet pile cofferdam structure, which belongs to the field of cofferdam buildings, and comprises a plurality of steel sheet pile bodies which can be spliced with one another; the multiple steel sheet pile bodies are driven into the deep bottom of a river channel through a pile driver, and every two adjacent steel sheet pile bodies are connected in an inserted mode. The multiple steel sheet pile bodies are matched with the corner pieces to jointly define a rectangular cofferdam. The corner pieces are located at the four corners of the rectangular cofferdam. A plurality of rectangular enclosing purlin assemblies which are arranged from top to bottom are arranged on the inner wall of the rectangular cofferdam, a plurality of supporting assemblies are evenly arranged in the enclosing purlin assemblies, and the supporting assemblies abut against and are matched with the inner wall of the rectangular cofferdam; the supporting assemblies in one-to-one correspondence in the enclosing purlin assemblies from top to bottom are jointly and fixedly connected through cooperation of bolt rods and nuts. By means of the three-point supporting design, the adjustable assembly and the modular linkage structure, the problems of insufficient supporting strength, poor deformation adaptability and overall stability of the deep excavation cofferdam are solved in a targeted mode, and the construction safety and the structural reliability are remarkably improved.

The invention relates to the technical field of foundation pit deformation prediction, in particular to a full-buried sewage plant deep foundation pit deformation prediction method based on multi-source monitoring. According to the multi-time-scale data change rate of each monitoring point of a target deep foundation pit, a time sequence feature vector is formed, and according to the environmental parameter time sequence change of a future sudden weather working condition, a prediction monitoring data time sequence vector is generated in combination with prediction monitoring data of each monitoring point before the working condition occurs; performing prediction monitoring data comparison on each monitoring point and an associated monitoring point to form a prediction monitoring data space vector, fusing a time sequence and the space vector to screen similar historical samples, and constructing a prediction mapping relation based on historical monitoring data of the similar historical samples and deformation; and the prediction time sequence deformation amount of the future sudden weather condition is output, and safety early warning is carried out, so that refined and intelligent prediction of deep foundation pit deformation is realized, the timeliness and effectiveness of safety early warning are ensured, and the engineering safety accident risk is reduced.

This invention relates to the field of deep foundation pit construction technology, and particularly to a control system and method for deep foundation pit deformation based on green and environmentally friendly principles. The method includes: acquiring geological survey data and environmental data of the area to be constructed in the deep foundation pit; constructing an integrated geometric model of the deep foundation pit construction area; determining whether the green and environmentally friendly performance of the support structure used in the deep foundation pit meets the standards based on the recycled material replacement rate, and adjusting the proportion of recycled materials incorporated into the support structure according to the ratio; determining whether the deformation of the deep foundation pit after simulated support construction is within a reasonable range based on the deep foundation pit deformation deviation rate, and adjusting the support structure parameters according to the relative difference; determining whether the impact of the deep foundation pit construction process on the surrounding environment meets the standards based on the deep foundation pit construction disturbance index, and optimizing the support inclination angle after adjusting the support structure parameters according to the difference. This invention improves the accuracy of deep foundation pit deformation control.

The invention discloses a narrow site working condition deep foundation pit supporting system and a construction method thereof.The narrow site working condition deep foundation pit supporting system comprises a pouring pile and a composite soil nailing wall, the composite soil nailing wall is arranged on the top of the pouring pile, a steel bar mesh is arranged on the top of the pouring pile, a plurality of steel bar soil nails are arranged on one side of the steel bar mesh, and the steel bar mesh is fixed through the steel bar soil nails; a steel pipe inclined support is arranged on one side of the pouring pile, a bottom plate is arranged on one side of the pouring pile through concrete pouring, a counter-force pier is arranged on one side of the bottom plate, and the steel pipe inclined support is fixed through the counter-force pier; the composite soil nailing walls and the steel pipe inclined supports are arranged, and the multi-aspect construction mode of the composite soil nailing walls, the cast-in-place piles and the inclined supports is adopted during construction, so that construction of supporting of the deep foundation pit in the narrow and small site is achieved under the working condition of the narrow and small site under the condition of not occupying a municipal road protection underground pipe network.

The invention relates to the technical field of foundation and foundation engineering, and discloses a pit-in-pit relay precipitation construction method for a water-rich soft soil ultra-deep foundation pit. The method comprises the steps that S1, foundation pit bottom plate post-cast strip dewatering well mouth joint treatment is conducted; s2, a foundation pit support pile suspension type water collecting tank system is installed; s3, mounting a prefabricated multi-stage adjustable filtering water collection tank at the top of the pit; s4, pit top and pit bottom pit-in-pit three-level relay precipitation circulation operation is carried out; s5, dismounting the water pump of the water collecting well based on the hanging bracket; and S6, pouring and concentrated plugging of the anti-overflow elephant trunk of the dewatering well. The foundation pit dewatering efficiency is guaranteed by arranging the relay pumping and drainage system, the problem of over-irrigation and overflow during dewatering well plugging is avoided through the novel elephant trunk structure, meanwhile, the problem that a traditional temporary pit top water collecting tank is poor in filtering is solved, and the method has the advantages that the construction quality is high, the dewatering efficiency is high, and water resources can be recycled.

The application discloses a kind of steel-concrete combined support active regulation and turnover evaluation method and system, it is related to geotechnical engineering deep foundation pit support and monitoring technical field.The method includes two big technical schemes: one, the equivalent time-varying parameter of combined support is determined, the real-time monitoring data of combined support is obtained, then the temperature action component in monitoring total axial force, time effect component is calculated, finally the real stress response is calculated and combined support is actively regulated;Second, based on the strain history of the whole service process, plastic damage component, fatigue damage component and time-varying stiffness damage component are calculated respectively, and a comprehensive damage index is constructed by weighted summation.According to the preset grading threshold, the component disposal suggestion is output.The application can effectively eliminate the interference of temperature fluctuation and time-varying effect on regulation decision, and provide objective quantitative damage evaluation basis for component turnover use.The application can realize the whole life management of combined support, and improve the safety and economy of component turnover use.

This invention provides a construction method for single-sided formwork with external cladding and soil backfilling, relating to the field of deep foundation pit support technology. This method includes S1: constructing a three-dimensional geological model based on geotechnical investigation data, determining critical excavation parameters through numerical analysis, and generating an excavation safety threshold report; S2: based on the excavation safety threshold report, designing a lightweight formwork system using a structural optimization algorithm, and installing a reinforcing layer to enhance interface bonding, forming a high-precision formwork system that meets verticality control standards. By constructing a three-dimensional geological model based on geotechnical investigation data and determining excavation parameters using numerical analysis, the support structure design accurately matches geological conditions, avoiding redundancy or inadequacy in support caused by empiricism. The use of a structural optimization algorithm to design a lightweight formwork system and pre-install a reinforcing layer improves the formwork stiffness and interface bonding strength, ensuring the morphological stability of the single-sided formwork under soil backfilling conditions.

The invention relates to the technical field of building construction, in particular to a deep foundation pit excavation, replacement and support device and method. Comprising I-shaped steel, a supporting steel beam, a limiting assembly and an anti-skid assembly, the limiting assembly comprises a first attaching block, a second attaching block and a connecting pull rod, the adopted supporting steel beam is an annular steel pipe with a certain thickness, and therefore during supporting, compared with a traditional concrete structure, the maintenance time is shortened; and the supporting steel beam of a novel steel structure is adopted, so that the overall installation impression is good, the construction period can be shortened, the environment-friendly construction concept is adapted, and the secondary recycling rate is increased.

The utility model discloses a deep foundation pit dewatering and drainage system, and relates to the field of construction site drainage, the deep foundation pit dewatering and drainage system comprises a drainage hopper, a water tank is formed in the drainage hopper, a drainage pipe is fixed on one side of the drainage hopper, the drainage pipe is communicated with the water tank, a first filter screen is fixed on the drainage hopper, the first filter screen corresponds to the water tank, and a second filter screen is fixed on the drainage hopper. A second filter screen is fixed to the filter screen, a loosening mechanism is arranged on the drainage hopper, and a stirring mechanism is arranged in the drainage hopper. The loosening mechanism moves on the drainage hopper, the loosening mechanism cleans away silt blocking the first filter screen, meanwhile, the loosening mechanism drives the stirring mechanism, the stirring mechanism mixes silt sinking to the bottom in a water tank of the drainage hopper with accumulated water, and therefore the situation that the filtered silt blocks the first filter screen, and normal passing of the accumulated water is affected can be reduced; and the drainage efficiency is not high.

The present application relates to a kind of pile anchor deep foundation pit external corner supporting structure and construction method, belong to deep foundation pit engineering technical field, including several support piles, several support piles are divided into two groups and are arranged in the two right-angle sides of external corner area of foundation pit, between each adjacent two support piles, it is connected by fixed mechanism, stable mechanism for avoiding support pile tilting is equipped in external corner area of foundation pit, the present application is by in the soil of external corner area of foundation pit according to certain rule and hit new pile, simultaneously by using different anchor cable fixed position for three kinds of situations of general foundation pit depth, foundation pit depth is deeper and foundation pit depth is very deep, the difficult problem of supporting weakness in external corner area of foundation pit and external corner transverse and longitudinal anchor cable cross each other is solved, corresponding technical scheme is made to different foundation pit depth, can guarantee that no matter which kind of situation, support pile in external corner area of deep foundation pit will not be tilted to foundation pit and anchor cable will not cross each other, can be widely applied in deep foundation pit engineering.

The present application relates to a kind of prestressed pipe pile group construction method of adjacent deep foundation pit engineering, comprising the following steps: at least one stress release hole being constructed in the second foundation pit needing to carry out prestressed pipe pile group construction and being separated between prestressed pipe pile group construction area and adjacent first foundation pit;A anti-extrusion ditch is constructed in the second foundation pit and is separated between the stress release hole and the first foundation pit;The construction of each prestressed pipe pile is carried out in the order of 1 to m for prestressed pipe pile group distributed in m × n (m is row number, n is column number) matrix, wherein the first row is relatively close to the first foundation pit, and the mth row is relatively far away from the first foundation pit.The method can greatly reduce the influence of prestressed pipe pile on adjacent existing or under-construction structures during pile sinking process, and meet the construction requirements of adjacent deep foundation pit engineering.

A kind of soft soil layer deep foundation pit underground comprehensive pipe gallery supporting structure, including subway line area (1), it is characterized in that: one side of the subway line area (1) periphery is left piling area (2), the other side of subway line area (1) periphery is right piling area (3), located left concrete pile (4) and located right concrete pile (4) between along the spanning direction of underground comprehensive pipe gallery is erected with arc protective arch (6), two rows of support piles (13) are vertically fixed on arc protective arch (6) or cambered surface connecting component (8) and are arranged, located the same side support pile (13) between is provided with pipe gallery continuous wall (16) by concrete pouring, the present application has reasonable structure, arc protective arch is used as protective main structure, the load of structure, backfill soil and construction machine above subway line area is shared to the piling area outside bottom subway line area, the safety of subway line is guaranteed to the greatest extent.

The application belongs to the technical field of foundation pit engineering, and particularly relates to a soil-rock composite stratum deep foundation pit deformation time sequence prediction method based on a GA-PSO-GLSSVM algorithm, which comprises the following steps: S1, a data integration stage, S2, a parameter dynamic optimization stage, S3, a feature engineering stage, S4, a model construction stage and S5, a closed loop verification stage; the original monitoring data is subjected to non-equal-interval smoothing treatment through an accumulation generating operator to construct an input sequence with enhanced stability, this step effectively eliminates random fluctuations in the original data, highlights long-term trends of the data, provides a more stable and reliable data basis for subsequent parameter optimization and prediction, and further improves the prediction accuracy.

The present application relates to the technical field of deep foundation pit engineering construction monitoring, in particular to a kind of wharf tippler room deep foundation pit supporting structure construction monitoring deformation simulation method and system;The method is first based on construction mode, geological characteristics and other key causes, divides deformation mode and constructs the deformation mode library of working condition full coverage;After pre-processing construction monitoring data, combined with modal library data, construct deformation mode combination weight optimization model, convert into linear programming model to obtain combination weight;Based on weight calculation supporting structure control point position three-dimensional deformation value and deformation coordinate, generate the overall deformation three-dimensional model using B-spline method, and update the model in real time through dynamic monitoring data.The present application breaks through the limitation of limited monitoring point, realizes the high-precision simulation and real-time three-dimensional visualization of supporting structure overall deformation, does not need to rely on a large number of historical data, and has strong adaptability, provides reliable technical support for wharf tippler room deep foundation pit construction safety early warning and management.

The invention relates to the technical field of deep foundation pit supporting and fabricated underground structure construction, and discloses a foundation pit fabricated side wall and enclosure adjustable force transmission structure which comprises a lower section structure composed of a bottom sealing plate and a lower section sleeve and an upper section structure composed of an upper section sleeve, a limiting lead screw and a rotating handle. By means of the adjustable mechanical design, the defects of traditional concrete backfilling are overcome, wide-range stepless adjustment is achieved through the spiral transmission mechanism, the fertilizer groove width deviation is perfectly adapted, field cutting or filling is not needed, the middle plate can be synchronously installed along with the side wall as a prefabricated part, and rapid jacking can be achieved by rotating a wrench after the middle plate is completed; the concrete pouring and curing waiting time is thoroughly saved, and the construction efficiency is greatly improved; meanwhile, the rigid mechanical force transmission path ensures high bearing capacity and reliability, the test is free of damage and deformation, the whole device is simple in structure and is operated only by a common wrench, and the construction difficulty and cost are reduced.

The application provides a PC formwork system suitable for a deep foundation pit basement outer wall and a construction method thereof. The formwork system is formed by combining and installing a foundation mechanism, a frame mechanism, an outer wall mechanism, a supporting mechanism and a platform mechanism, and then is used for constructing a basement outer wall. Compared with a traditional cast-in-place system, the construction effect is fast, a large amount of manpower and material resources is saved, the construction period is shortened, the construction efficiency is improved, the problems of slow construction, low efficiency and the need of a large amount of labor in the traditional pouring mode are solved. After the basement outer wall pouring is completed, the formwork system can be quickly disassembled and treated, and can be reused in the next basement outer wall pouring process, so that the cost is saved.