110 results about "Ground settlement" patented technology

The invention provides a shield tunneling parameter intelligent optimization method and system based on an AI big language model, and relates to the technical field of tunnel construction optimization. Comprising the following steps: training an open source large model to obtain a preliminary shield tunnel construction industry large model; an upstream task and a downstream task which are relatively independent are set, and the upstream task comprises a tunneling speed prediction module, a tool wear prediction module, a ground surface settlement prediction module and a tunneling attitude prediction module; a downstream task combines an RAG technology and an NSGA-III multi-objective optimization framework, four prediction modules and an energy consumption calculation formula serve as objective functions, the value range of constraint conditions is determined, a tunneling parameter optimization module is established, a professional shield tunnel construction industry large model is formed, and scientific and intelligent decision making of tunneling parameters is achieved. According to the method, information in multiple aspects can be comprehensively considered during decision making, the reasoning process is output, and scientificity, comprehensiveness and reliability of decision making are ensured.

The invention discloses a digital twin-driven foundation settlement multi-physics field coupling simulation platform and a use method thereof, relates to the technical field of foundation settlement analysis, and solves the technical problem of settlement prediction deviation accumulation caused by incapability of synchronously updating seepage field and stress field coupling boundary conditions. According to the invention, the twinborn construction unit and the multi-physics coupling solving unit are installed, so that the rapid construction of the digital twinborn of the stratified geologic structure and the multi-physics coupling effect calculation of a stress field, a seepage field and a temperature field of a soil body are realized, and the problem of insufficient precision of traditional single-field simulation is solved; by installing a noise filtering unit and a data standardization unit, elimination of high-frequency interference components of sensor signals and time-space alignment of multi-source data are achieved, the problem that noise interference of geological exploration data is incompatible with heterogeneous formats is solved, and the accuracy and accuracy of foundation settlement analysis are improved. And the reliability of input data and the stability of a simulation result are improved.

The invention relates to an earth surface deformation detection and classification method and system fusing CNN and SBAS-InSAR technologies, and the method comprises the steps: obtaining high-precision deformation data through a small baseline subset and an interference synthesis radar technology (SBAS-InSAR), constructing a CNN classification frame through combining PCA-enhanced optical satellite images, elevation, soil physical parameters, geological landform maps and other multi-source geographic information, and carrying out the detection and classification of the earth surface deformation through the CNN classification frame and the SBAS-InSAR technology. And identification of deformation types such as landslide, settlement and lifting is realized. The process comprises multi-source satellite data acquisition and preprocessing (including InSAR sight velocity decomposition and optical / topographic feature extraction), generation of a preliminary deformation label based on a classification algorithm of a gradient and a deformation velocity threshold, and recognition of a deformation type through a multilayer CNN model. According to the method, the deformation mode is automatically clustered and analyzed in a large-range area, the accuracy and detail performance of deformation type recognition are remarkably improved, the accuracy rate reaches 93%, the method is superior to a traditional method, a stable and extensible tool platform is provided for geological disaster monitoring, and positive risk management of landslide or land subsidence prone areas is assisted.

The invention provides a bimodal substation foundation settlement deformation dynamic prediction method and system, and relates to the technical field of foundation settlement, and the method comprises the steps: deploying a bimodal sensing monitoring network on a target substation to collect foundation mechanical deformation data and foundation deformation positioning data; building a foundation deformation data processing channel to carry out preprocessing and weighted fusion on the foundation mechanical deformation data and the foundation deformation positioning data to obtain foundation settlement deformation fusion data; and training a foundation settlement deformation prediction network to dynamically predict the foundation settlement deformation fusion data, determining a foundation settlement deformation prediction quantity, and triggering a settlement abnormity response mechanism based on the foundation settlement deformation prediction quantity to carry out graded response early warning. The technical problems that in the prior art, transformer substation foundation settlement risk identification lags behind, the disposal efficiency is low, and safe and stable operation of a transformer substation is difficult to guarantee can be solved, and the technical effect of guaranteeing long-term safe and stable operation of the transformer substation is achieved.

The invention discloses a salt lake brine mining method and system for hydraulically gradient-driven water replenishing and ore dissolving of a sedimentation funnel, and relates to the technical field of salt lake mineral resource development, the method comprises the following steps: S1, collecting water level data of a sedimentation funnel area, calculating gradient distribution, dividing functional areas, and generating zoning parameters; s2, based on the partition parameters, a water injection well network is arranged in the gradient direction, water injection parameters are determined according to the water level difference, and a well network scheme is generated; s3, based on a well pattern scheme, injecting the proportioning solvent into an ore bed in a layered manner to form a directional seepage field, and generating solute transport data; s4, on the basis of solute transport data, enriched brine is extracted in the collection area, the concentration is monitored, and brine parameters are generated; and S5, based on the deviation between the brine parameter and the target value, calculating the regulation amount, adjusting the injection-production parameter to maintain dynamic balance, and outputting the salt lake brine with the target concentration. By regulating and controlling the hydraulic gradient, the form of the settlement funnel is stabilized, the phenomena of stratum disturbance and ground settlement are reduced, and the ecological risk is reduced.

The invention discloses a goaf grouting ground surface settlement precise monitoring method, which uses a ground surface deformation precise monitoring method fusing GNSS, InSAR, D-InSAR and SBAS-InSAR technologies, generates an interference image set on the basis of InSAR and D-InSAR, selects a stable coherent target point, solves the phase information of the coherent target point, and obtains the goaf grouting ground surface settlement precise monitoring result. Therefore, information such as ground subsidence rate and time sequence of the coherent target point is obtained. According to the method, satellite remote sensing, a low-altitude unmanned aerial vehicle and a laser LiDAR are fused to assist a ground precision level construction site residual subsidence deformation air-space-ground integrated monitoring technology, efficient acquisition and refined monitoring of construction site ground surface deformation information are realized, a construction site refined model based on the unmanned aerial vehicle and the LiDAR is constructed, and the construction site residual subsidence deformation monitoring method based on the InSAR and the D-InSAR is established based on the InSAR and the D-InSAR. Generating an interference image set; the method is high in monitoring precision, wide in monitoring range, small in weather influence, convenient and easy in monitoring implementation, relatively low in cost, high in safety, fast in data updating and rich in data volume, and can monitor the continuous deformation process of a ground target on a time sequence.

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 application discloses a filling and paving device for preventing settlement of a factory building foundation, and relates to the field of foundation paving. The device solves the problem that the existing filling and paving device has a large roller size and is difficult to detect and fill local settlement. The device comprises a vehicle body, a storage box, a filling mechanism and a compaction mechanism. The filling mechanism comprises a compaction roller, a conveying screw and a control member. The bottom of the storage box is fixedly connected with a plurality of output grooves. The device controls the ground settlement state of the compaction roller in the rolling sensing area on the ground through the filling mechanism, and controls the output state of the filling material and the rotating speed of the conveying screw in parallel, so that the output rate of the filling material is faster at the position with a larger ground settlement amplitude. The control member controls the lifting of the compaction roller to control the compaction strength. The ground before detection and the ground after filling are compacted respectively through the compaction mechanism, the ground is kept flat, and the strength of the ground after filling is improved.

The utility model discloses a subway tunnel settlement rapid detection device based on a laser radar, belongs to the technical field of ground settlement detection, and solves the problems that an existing device is inconvenient to adjust the measurement position, is inconvenient to directly obtain the result of whether a tunnel settles or not, and is troublesome to use, the subway tunnel settlement rapid detection device comprises a bottom plate, and the top surface of the bottom plate is provided with a rotating plate; a detection assembly is arranged on the bottom plate and the rotating plate, connecting plates are fixedly mounted on the front side and the rear side of the top face of the left end of the bottom plate, a rotating rod is fixedly mounted on the side wall of the mounting groove, and the end, away from the rotating plate, of the rotating rod is rotatably mounted on the side wall of the connecting plate; the distance between the rotating plate and the first laser radar is measured through the first laser radar, meanwhile, the distance between the bottom face of the rotating plate and the second laser radar is measured through the second laser radar, corresponding numerical values are displayed through the first display screen and the second display screen, and if the numerical values displayed by the first display screen and the second display screen are inconsistent, the conclusion that the bottom face of the tunnel is partially settled can be obtained.

The utility model discloses a test device for simulating the influence of aircraft taxiing and landing on foundation settlement, which relates to the technical field of foundation treatment and model test and comprises a trolley, a telescopic smooth guide rail, a thrust device, a vertical telescopic smooth platform, a buffer device, a monitoring sensor, a model runway and a model soil layer. The device creatively integrates a runway model box to reproduce a runway surface structure layer and a pile-net composite foundation, a taxiing landing device is adopted to simulate the taxiing landing process of an aircraft, and braking is achieved through a buffer device. A drainage device is embedded in the device, the sliding trolley is arranged in a front three-point mode to simulate a main landing gear of an airplane, and a 3-degree gliding angle is kept to be close to the real sliding condition. The test device not only considers the transverse impact force of an aircraft, but also performs adaptive design for different tire configurations, and provides a valuable simulation and monitoring means for exploring the dynamic characteristics of aircraft taxiing-landing integration on the pile-net composite foundation.

The invention provides a construction deformation prediction method and device, electronic equipment and a storage medium, and belongs to the technical field of data prediction, and the method comprises the steps: obtaining historical working condition parameters of a subway tunnel construction process; constructing a regularization item related to a sample point feature space; determining a decision tree splitting criterion based on a regularization item, recursively dividing each feature in the sample point feature space into non-overlapping hyperrectangular regions, and constructing a decision tree; calculating a posterior probability distribution parameter of each leaf node in the decision tree based on a Bayesian inference updating rule; defining a structure risk penalty function in combination with the posterior probability distribution parameters to perform post pruning on the decision tree to obtain an optimal decision tree; real-time geological exploration parameters and real-time shield tunneling machine tunneling parameters in the subway tunnel construction process are collected; and real-time geological exploration parameters and real-time shield tunneling machine tunneling parameters are input into the optimal decision tree, and a monitoring point ground settlement prediction interval is output, so that the deformation prediction accuracy under the complex geological condition is effectively improved.

The application discloses a kind of for collapsible loess foundation settlement monitoring device, it is related to foundation settlement monitoring technical field, including base and the reference cylinder being set to base one side, the top of the base is fixedly connected with cover by bolt, the top of the cover is connected with top seat by bolt, the inside of the cover is provided with monitoring rod, the circumference of the monitoring rod is slidably connected with float;The inside of the cover is provided with expansion assembly, the top of the top seat is provided with exhaust assembly, the inside of the base is fixedly connected with circuit board, the circumference outer wall of the base is respectively provided with first docking pipe and plug, one end of the first docking pipe is fixedly connected with connecting pipe.The application effectively avoids the problem of measurement interruption caused by liquid level being too high to exceed the initial monitoring range of float, realizes the dynamic improvement of the monitoring range of the whole settlement monitoring device, meets the monitoring demand of people to collapsible loess foundation settlement.

The application relates to the field of pipeline supporting equipment, in particular to a pipeline supporting device suitable for easily-settled ground, which comprises a pipeline fixing mechanism, a first supporting mechanism and a second supporting mechanism. The pipeline fixing mechanism comprises an upper fixing assembly and a lower fixing assembly arranged at the lower part of the upper fixing assembly. The first supporting mechanism comprises a first supporting column assembly arranged at the lower part of the lower fixing assembly and adjusting assemblies arranged at the two sides of the supporting column assembly. The second supporting mechanism comprises a second supporting column assembly arranged at the outside of the first supporting column assembly and a bottom plate assembly arranged at the lower part of the second supporting column assembly, and the bottom plate assembly is slidingly arranged below the lower fixing assembly. Through the cooperation of the pipeline fixing mechanism, the first supporting mechanism and the second supporting mechanism, the pipeline can be supported after small-amplitude ground settlement, and the first supporting mechanism and the second supporting mechanism are not easy to be damaged when falling away from the fixing mechanism.

The present application relates to the field of ground settlement prediction, and provides a time effect analysis method for ground settlement induced by foundation pit excavation in soft clay area, comprising: determining the time required for foundation pit construction under all working conditions and the retaining wall side displacement curve; determining the soil parameters according to the Boltzmann viscoelastic foundation model; obtaining the viscous settlement of all working conditions by using the Boltzmann viscoelastic foundation model; setting t=0 and the boundary condition as the retaining wall side displacement curve of all working conditions to obtain the elastic settlement under different working conditions; setting the boundary condition as the retaining wall side displacement curve when the bottom plate strength is formed to obtain the viscous settlement of the soil outside the pit after the bottom plate strength is formed; and summing the elastic and viscous settlement to obtain the ground settlement of the to-be-solved arbitrary working condition. The present application overcomes the problem that the existing theoretical method cannot consider the time effect of the soil, thereby leading to the problem that the prediction of the ground settlement is not safe, and also considers the ground settlement after the bottom plate strength is formed without depending on the retaining wall side displacement, which is more engineering significant and has good popularization and application value.

The utility model discloses a measuring device for foundation settlement detection, which comprises a fixed bottom plate, a rotating base is fixedly mounted at the top of the fixed bottom plate, mounting bolts are in threaded connection with four corners of the fixed bottom plate, a connecting sleeve is rotatably connected in the rotating base, a positioning groove is formed in the outer side wall of the connecting sleeve, and the positioning groove is in threaded connection with the mounting bolts. A groove is formed in the end of the positioning groove, a supporting vertical rod is inserted into the connecting sleeve, a positioning screw is in threaded connection with the outer side of the bottom end of the supporting vertical rod, a comparison assembly is movably connected into the supporting vertical rod, and a mounting assembly is fixedly connected to the top end of the supporting vertical rod. According to the device, the rotatable rotating base and the connecting sleeve are designed, so that the device can rotate, the angle of the device can be adjusted according to the actual detection situation, angle deviation and settlement data of the device installed on a pre-buried point position can be visually observed, and the device is convenient to use and high in practicability. And a more accurate detection result is obtained.

The invention relates to an earth pressure balance control method and system for assisting in shield attitude adjustment. The method comprises the steps that historical data are collected, and an earth pressure setting model is constructed; in the tunneling process of the shield tunneling machine, actual construction data, actual ground surface settlement monitoring data and shield tunneling machine tunneling data are obtained in real time; based on the tunneling data of the shield tunneling machine, whether advancing of the current ring is finished or not is judged, if yes, an earth pressure setting model is called, and the earth pressure setting model calculates and outputs a theoretical earth pressure set value of the next ring based on the actual construction data and the actual ground surface settlement monitoring data; whether the elevation of the shield tail is continuously lower than a preset elevation threshold value within a certain time range and cannot be increased or not is judged based on tunneling data of the shield tunneling machine, and if yes, a soil pressure front half ring pressurization mode is started so that the soil pressure set value of the front half ring of the next ring can be automatically pressurized. According to the method, the shield tunneling posture and the earth pressure influence of ground surface settlement are comprehensively considered, and the accuracy of the earth pressure set value is guaranteed.

The application relates to a radiation-proof building structure containing settlement joints and a construction method thereof, and relates to the technical field of radiation-proof building construction. The radiation-proof building structure containing settlement joints comprises two support plates, a plurality of outer wall bodies located between the two support plates, and all the outer wall bodies are sequentially arranged in a head-tail connection mode along the circumferential direction of the support plates. The outer wall bodies are connected with each support plate. The outer wall bodies are provided with wall surface settlement joints, the support plates are provided with ground surface settlement joints, the ground surface settlement joints and the wall surface settlement joints are connected with each other, the upper surfaces of the support plates are provided with ground surface radiation-proof layers and ground surface radiation-proof expansion devices covering the ground surface settlement joints, and the surfaces of the outer wall bodies are provided with wall surface radiation-proof layers and wall surface radiation-proof expansion devices covering the wall surface settlement joints. The wall surface radiation-proof expansion devices can automatically expand and contract to cover the wall surface settlement joints at all times, the ground surface radiation-proof expansion devices can automatically expand and contract to cover the ground surface settlement joints at all times, and therefore the possibility of radiation leakage to the outside is reduced.

This invention relates to the field of underground engineering structural safety assessment methods, providing a method for analyzing the longitudinal deformation and stress of rectangular pipe jacking under existing pressure pipelines. The method includes: establishing a simplified mechanical model of the pressure pipeline; establishing a prediction model for ground settlement caused by the rectangular pipe jacking by modifying the Peck empirical formula, and establishing an analytical relationship between the vertical displacement of the pipeline and the free displacement of the soil; solving the longitudinal displacement field of the pipeline caused by the new rectangular pipe jacking under the pipeline based on the displacement compatibility equation; and applying the Mises stress criterion to calculate the composite stress state of the pipeline, thereby achieving a pipeline stress safety assessment. This invention proposes a calculation method considering the coupling of internal pressure, pipeline, and soil, and theoretically establishes a quantitative relationship between displacement and stress of municipal pipelines caused by the new rectangular pipe jacking under the pipeline. This method can consider the influence of internal forces in municipal pipelines, providing a reliable theoretical method for the safety assessment of rectangular pipe jacking under municipal pressure pipelines.

The utility model discloses a roadbed settlement monitoring device, which relates to the technical field of roadbed settlement monitoring, and comprises a bottom plate, a moving frame is arranged above the bottom plate, the outer side of the moving frame is fixedly connected with a connecting plate, the top of the bottom plate is provided with a monitoring mechanism, the monitoring mechanism comprises a monitoring assembly and a moving assembly, the monitoring assembly and the moving assembly are used in cooperation, the monitoring assembly comprises sliding columns, the sliding columns are slidably connected to the interior of a connecting plate at equal intervals, the outer sides of the sliding columns are sleeved with pressing springs, and the indicating arrow and the scale marks are used in cooperation. According to the roadbed settlement monitoring device disclosed by the utility model, by arranging the monitoring mechanism, a worker can monitor the ground settlement degree through reading changes, and compared with a single-point monitoring mode and a multi-position monitoring mode, the roadbed settlement monitoring device is more accurate, wider in monitoring range, better in monitoring effect, simple in structure and higher in practicability.

The invention discloses a ground surface settlement compensation method for a soft rock tunnel, and relates to the technical field of soft rock tunnel construction.The ground surface settlement compensation method for the soft rock tunnel comprises the steps that the section of the soft rock tunnel is divided into a plurality of excavation units according to the geological conditions of soft rock in the soft rock tunnel; establishing a quantitative relation model of the excavation unit and the ground surface settlement area; predicting an excavation result according to the quantitative relation model, and obtaining an excavation sequence according to the prediction result; excavating each excavation unit according to the excavation sequence, and implementing dynamic pressure balance compensation to form an excavation part; and gradually backfilling and curing the ground surface settlement area corresponding to the excavation part to finish the ground surface settlement compensation of the soft rock tunnel. According to the method, the excavation units with uniform geological conditions are divided, the quantitative relation model is established, and dynamic pressure balance compensation and layered backfill solidification technologies are combined, so that the solidification effect of the ground surface settlement position of the soft rock tunnel is improved, and the safety of the soft rock tunnel is improved.

The invention relates to a construction process for erecting beams on beams in limited urban road construction space, which comprises the following steps of: installing at least two temporary supports at a continuous end of a T-shaped beam hoisting position, and installing a permanent support on a padstone at the top of a pier; sequentially hoisting the (1-n) th T beam on the temporary supports and the permanent supports along the direction gradually approaching the beam conveying channel, n being greater than or equal to 2, and carrying out temporary supporting after hoisting is completed; the crane is transferred to a bridge floor formed by the (1-n) th T beam, the (n + 1)-m th T beam continues to be hoisted, m is larger than or equal to n + 1, and temporary supporting is selectively conducted after hoisting is completed; and wet joint steel bar welding construction of the (1-m) th T-beam is completed, and construction machinery retreating and follow-up structure construction are organized according to a standard program. According to the method, the T-shaped beam is arranged to be a method of erecting the beam on the beam, beam erecting can be completed in a narrow space without a hoisting site or under the special working conditions of an existing pipeline protection area and the like, the influence on traffic is reduced, and meanwhile the problems of soft foundation settlement and the like are solved.

The invention discloses a well lid structure convenient to maintain, which comprises a well body seat, and a connecting mechanism is mounted on the well body seat and is used for being connected with the well body seat. The connecting mechanism comprises a pressing cylinder slidably connected with the interior of the well body base, at least one step edge is machined on the pressing cylinder, the lowest point of the step edge is fixedly connected with an inserting piece, and a clamping assembly is installed at the bottom end of the step edge. According to the well lid structure convenient to maintain, when a height difference is generated between the well lid and the ground due to uneven settlement of the ground or change of surrounding soil texture, maintenance personnel do not need to carry out tedious operation like a traditional mode, and due to the fact that a pressing cylinder is matched with a step supporting block through a step edge and an inserting piece, the maintenance efficiency is improved; maintenance personnel only need to lift the pressing cylinder upwards, reselect the stepped supporting block inserting groove with the appropriate height according to actual needs and insert the inserting piece into the stepped supporting block inserting groove, and then height adjustment can be rapidly completed.

The application discloses a surface subsidence compensation method for soft rock tunnels and relates to the technical field of soft rock tunnel construction, wherein the surface subsidence compensation method for soft rock tunnels comprises the following steps: according to the geological conditions of soft rock in a soft rock tunnel, the section of the soft rock tunnel is divided into a plurality of excavation units; a quantitative relationship model of the excavation units and surface subsidence areas is established; the excavation result is predicted according to the quantitative relationship model, and the excavation sequence is obtained according to the prediction result; each excavation unit is excavated according to the excavation sequence, dynamic pressure balance compensation is implemented, and an excavation part is formed; the surface subsidence area corresponding to the excavation part is gradually backfilled and solidified, and the surface subsidence compensation of the soft rock tunnel is completed. Through the division of the excavation units with uniform geological conditions and the establishment of the quantitative relationship model, the dynamic pressure balance compensation and the layered backfilling and solidification technology are combined, the solidification effect of the surface subsidence position of the soft rock tunnel is improved, and the safety of the soft rock tunnel is improved.

This invention relates to the field of tunnel boring machine (TBM) construction technology and discloses an intelligent prediction method for surface settlement considering unquantifiable parameters during TBM tunneling. The method includes: selecting a main cross-section to be predicted and historical auxiliary cross-sections with approximate unquantifiable parameters based on spatial proximity; constructing a dual-branch joint architecture for the main and auxiliary cross-sections, and training it using a neural network with shared network weights through deep learning to obtain an intelligent prediction model for surface settlement; and obtaining predicted settlement data for the main cross-section based on the intelligent prediction model. By constructing a dual-branch joint architecture for the main and auxiliary cross-sections and using deep learning with shared network weights, an intelligent prediction model for surface settlement with good generalization ability is obtained. This indirectly considers unquantifiable parameters and uses reverse reasoning to obtain accurate predicted surface settlement data, improving the predictability and safety of TBM construction.

The invention belongs to the technical field of supporting, and discloses an excavation auxiliary device suitable for an underground space structure of a soft rock stratum, which is characterized by comprising a positioning mechanism, the middle part of the positioning mechanism is rotatably connected with a first supporting mechanism, and the top of the positioning mechanism is also provided with a positioning frame; and the middle part of the positioning frame is rotationally connected with a second supporting mechanism. According to the large-span extra-large-section underground space structure of the soft rock stratum, the whole section is divided into seven pilot tunnels to be excavated in a segmented mode, primary support is immediately constructed after excavation in the segmented pilot tunnels, the phenomenon that the vault settlement value is increased due to overlarge span and tunnel face stress relaxation is eliminated, the stability of the excavation face is enhanced, and the vault settlement value and the ground settlement value are effectively controlled; and when a pilot tunnel a and a pilot tunnel b are excavated, the two sets of devices are placed on the two side walls of the pilot tunnel in a staggered mode, the positioning mechanism 1 is fixed through anchor rods, preliminary supporting of the pilot tunnel a and the pilot tunnel b is achieved, and supporting is more convenient.

The invention belongs to the field of underground engineering, and particularly relates to a simulation test detection method for the whole insertion and extraction process of a steel sheet pile. The simulation device is manufactured, a soil layer of a certain depth unit is laid in a model box of the simulation device, the steel sheet pile inserting and driving condition at any stratum depth can be effectively simulated through stacking and loading, quantitative indexes before and after steel sheet pile inserting and driving are established, and the disturbance condition of inserting and driving on a soil body is effectively represented; and the recovery rate indexes and the comprehensive treatment evaluation indexes of the disturbed area and the undisturbed area are established, so that the comprehensive evaluation of the treatment effect is realized, an objective evaluation system based on core quantitative indexes such as soil compactness change, ground settlement (displacement), strength and the like is established, and the limitation brought by traditional single dependence on qualitative analysis is overcome.

This utility model relates to the field of land settlement simulation technology, and discloses a land settlement device for simulating well flow stratified pumping, including a model box, an injection pipe, a pumping pipe, a water pump, a pressure measuring pipe, an earth pressure sensor, and a pore pressure sensor. The model box is cylindrical and is filled with alternating layers of clay and sand. A pumping pipe is installed along the central axis of the model box, and the injection pipe extends into it from the outside to the inside circumferentially. The pumping pipe has a multi-layered casing structure, with sealing airbags between the casings. The inner casing extends to a deeper sand layer, and the outer casing extends to a shallower sand layer. The pressure measuring pipe is installed within the depth range of each of the multiple sand-filled layers. Each casing of the injection pipe is connected to a water pump. Earth pressure sensors and pore pressure sensors are uniformly and symmetrically arranged inside the model box. This utility model aims to construct a geotechnical test chamber and simulate the radial flow field characteristics of a pumping well point through stratified pumping control, providing support for water-based well drilling projects.

The embodiment of the utility model provides a novel ground subsidence measuring point protection device which comprises a body and a top cover, the body comprises a hollow cylindrical barrel and a bottom side plate integrally connected to the bottom of the barrel, and the top cover is detachably connected with the top of the body; the bottom side plate is further provided with a vertically-through positioning hole, and the diameter of the positioning hole is larger than the diameter of a to-be-protected measuring point mark. According to the technical scheme, the novel ground subsidence measuring point protection device can better bear supporting of a lower soil body, is firm in fixation and not prone to sinking, the problem that an external road surface is pressed and deformed due to overall sinking generally existing in a ground subsidence measuring point protection device in the prior art is solved, and meanwhile it is guaranteed that measuring point identification and positioning are accurate.

A kind of calculation analysis method based on pipe roof pore-forming disturbance caused ground settlement, comprising: step S1: analysis the deformation mechanism and stress of pipe roof, set up calculation model;Step S2: according to the calculation model and construction condition, obtain tunnel depth and soil structure parameters;Step S3: pipe roof is approximated as small hole tunnel, and Peck formula is used for calculation;Step S4: the Peck formula for calculating ground settlement is used to calculate the ground settlement caused by pipe roof pore-forming disturbance, and multiple pipe roofs are replaced by large circle, and multiple small holes are associated;Step S5: determine the disturbance coefficient between pipe roofs, select measured data fitting;Step S6: considering the bending and compression deformation of pipe roof itself, and corresponding formula is proposed, and the displacement change of pipe roof structure is calculated.The present application can not only obtain the strata loss influence caused by advanced pipe roof pore-forming on upper strata more quickly and simply, but also can calculate the ground settlement caused by stress release when pipe roof pore-forming of shallow-buried tunnel.