150 results about "Consolidation (soil)" patented technology

The invention discloses a powder spraying pile composite roadbed deformation prediction method, and particularly relates to the field of roadbed settlement prediction, comprising the following steps: in an edge calculation node, respectively constructing an underground water level change event, a construction stage event, a soil consolidation stage event and a traffic load cycle event into independent event time chains; the event time chain is recorded by taking the occurrence moment of the event, the duration of the event and the interval duration between the events as a time step unit; and performing splitting operation on the time step units of each event time chain, and forming a time granularity matrix according to the duration difference between the time step units. A plurality of types of discrete events such as water level, construction, consolidation, traffic load and the like are uniformly disassembled into time step length units, and a time granularity matrix and a time dislocation vector are constructed, so that the rhythm difference and dislocation relationship of the events on different time scales can be quantitatively expressed; and solving the transition of the settlement stage by taking the result as the observation input of the variational Markov model.

The invention relates to a large-strain consolidation algorithm, equipment and medium for horizontal vacuum dehydration of sludge, and the algorithm comprises the following steps: 1, obtaining basic parameters of a constitutive relation of a target soil body through an indoor consolidation experiment and a penetration experiment, 2, obtaining load conditions of the target soil body through surveying a geological exploration report and an engineering design scheme, the method comprises the steps of (1) establishing a one-dimensional PHD consolidation model, (2) establishing a one-dimensional PHD consolidation model and deducing a control equation under equal strain conditions, (3) introducing a virtual time step and calculating the consolidation degree in a manner of carrying out segmented increment processing on time, (4) establishing the one-dimensional PHD consolidation model and deducing a control equation under equal strain conditions, and (5) calculating the final consolidation degree based on the virtual time step and the control equation, and further comprises equipment and a medium. According to the method, the influence of non-uniform consolidation is incorporated into the one-dimensional theoretical consolidation analysis of the Taisha foundation, and the consolidation coefficient is corrected by using the control equation based on the virtual time step and the strain condition, so that convenient and accurate consolidation calculation is realized.

The invention belongs to the technical field of underground passage construction, and particularly relates to a counter-force structure construction method for pipe roof jacking, which comprises the following steps of: driving support piles at two ends of a corresponding side line behind a working well to form corresponding counter-force columns; steel sheet piles are arranged between the two counter-force columns along the corresponding side line behind the working well in a driving mode, counter-force steel plates are installed on the counter-force walls, and grouting pipes penetrate through the counter-force steel plates, then stretch into the rear undisturbed soil from gaps between the steel sheet piles and are fixedly connected with the rear undisturbed soil into a whole through grouting. Through the synergistic effect of the counter-force column formed by the supporting piles and the undisturbed soil subjected to grouting consolidation, a composite counter-force system is constructed, and the bearing capacity and stability of the counter-force structure are effectively improved. The protection piles and the supporting piles are meshed with each other to form a closed or semi-closed structure, the stability of the soil body around the working well is further enhanced by matching with the reinforcing effect of the top beams and the inclined struts, and collapse or displacement of the soil body in the jacking process is avoided.

This invention discloses a modeling method for layered soft soil subgrades reinforced with pile foundations under simulated seismic loading, belonging to the field of seismic numerical simulation in geotechnical engineering. This method constructs a multi-field coupled numerical model based on a finite element platform, defines the contact mechanisms at the pile-soil and reinforced-subgrade interfaces, and completes the construction of in-situ stress equilibrium and initial pore water pressure fields. Static results are output through fill-consolidation coupling analysis. Distributed viscoelastic artificial boundaries are automatically constructed using Python scripts, and seismic waves are converted into equivalent nodal loads using wave theory. Multi-physics field connections between static and dynamic analysis boundaries are achieved, and core response parameters such as embankment settlement and pile-soil stress are output through implicit dynamic analysis. This invention considers the seismic wave propagation effect in layered soils, reduces spurious oscillations caused by the transformation of static and dynamic boundaries, and improves simulation accuracy and efficiency. It is suitable for seismic design and analysis of transportation infrastructure in soft soil areas.

The application discloses a method for reinforcing and supporting soft soil layers along a coast and rapidly recycling steel sheet piles, and the construction method comprises the following steps: measuring data, formulating a construction scheme, conducting a construction test, correcting a theoretical analysis, organizing implementation, implementing deviation correction, and recycling materials. According to the method, the pore water in the soil is slowly drained by arranging vertical drainage plates, the pore ratio is reduced, the foundation is deformed, the strength of the foundation soil is gradually increased, the drainage distance is shortened by arranging the vertical drainage plates, the consolidation of the foundation is accelerated, the preloading period of the preloading project is shortened, the foundation can reach a good consolidation effect in a short period of time, the growth of the shear strength of the foundation soil is accelerated, the rate of the improvement of the bearing capacity of the foundation is always greater than the rate of the increase of the construction load, and the stability of the foundation is ensured, the vertical supporting system is formed by combining the lock buckle of the pipe pile and the steel sheet pile, so that the rapid enclosure construction is facilitated, the pipe pile and the steel sheet pile are convenient to disassemble and recycle, and the prefabricated assembly construction is realized.

The present application relates to a kind of soft soil reconsolidation under dynamic load processing method, solve the vibration drainage of existing soft soil in consolidation method vibration frame structure, it is difficult to manufacture vibration support foundation, construction is inconvenient, the problem of destruction of foundation after recovery.The method mixes cement in upper layer soil, forms cement soil base layer with strength in C5-C15;Uniformly set water pipe on cement soil base layer;Vibration rod is set in each water pipe;Place stack load plate on cement soil base layer, and vibration machine is fixed on stack load plate;Vibration machine fixed on stack load plate vibrates, drives vibration rod in water pipe, and free water generated after vibration is collected in water pipe, water in water pipe is discharged using water suction pump, until no free water is discharged after a period of vibration operation.The present application solves the problem that general vibration machine cannot effectively vibrate deep layer soil, and removes free water generated after vibration from soil, simultaneously, promotes soil particle to rearrange, and enhances soil compactness.

The invention discloses a soft soil foundation treatment method based on deep stirring and vacuum preloading, which comprises the following steps: arranging deep stirring piles in the deep layer of a soft soil foundation, and mixing a curing agent with in-situ soil to form a pile body network; plastic drainage plates are arranged between the piles, and the ground surface is covered with an airtight film; the vacuum system applies negative pressure of-50 to-80 kPa to drive pore water to be discharged; a settlement meter, a pore water pressure meter and a vacuum sensor are arranged and wirelessly fed back to the central system; the negative pressure is automatically adjusted based on a PID algorithm or a fuzzy algorithm; and predicting the settlement trend by combining a regression model. According to the soft soil foundation treatment method based on deep stirring and vacuum preloading, rigidity is enhanced through the pile nets, real-time self-adaptive pressure control is achieved, uniform solidification is achieved, the construction period is remarkably shortened, the bearing capacity is improved, and the method is suitable for coastal deep soft soil.

The transparent soil embankment rigid frame pile displacement observation simulation test system comprises a model box, a soil body consolidation mechanism, a rainfall load simulation mechanism, a traffic load simulation mechanism, a light source mechanism, a shooting mechanism and a calculation analysis mechanism. And the settlement and displacement of the transparent soil embankment slope under the action of the composite load can be observed in real time. Wherein the rainfall load module can accurately regulate and control the rainfall intensity and the rainfall capacity; the traffic load module can simulate the size and frequency of a vehicle cyclic load; the laser slicing technology of the light source module and the high-speed imaging technology of the shooting module are combined, and the PIV technology of the calculation and analysis module is matched, so that the dynamic deformation field in the transparent soil can be obtained. The device fills up the blank that an existing transparent soil test lacks real engineering load simulation, provides experimental data closer to reality for research of slope stability, foundation settlement and the like, and has the advantages of being simple in structure, convenient to regulate and control and accurate in observation.

The invention relates to the technical field of reclamation area foundation reinforcement, and particularly discloses a collaborative resistance increasing construction system and method for a reclamation area multi-stage anchoring uplift pile, through a multi-stage anchoring structure, in combination with a microorganism induction mineralization technology and a power pre-pressing compaction technology, the binding force and uplift performance of a pile body and a soil body are remarkably improved, and the construction efficiency is improved. In addition, an environment-friendly microorganism grouting mode is adopted to replace traditional chemical grouting, and negative effects on the ecological environment are reduced. Vibration and a vacuum drainage process are combined in the pre-pressing compaction process, so that the compaction and consolidation process of the soil body is further accelerated, and the stability of the pile body in a complex soil layer and a marine environment is ensured. According to the scheme, through structure optimization and process collaboration, the bottleneck problem of application of a traditional uplift pile in a reclamation area is solved, and remarkable economic benefits and environmental advantages are achieved.

This utility model discloses a capillary drainage geogrid, comprising a geogrid body composed of longitudinal and transverse grid strips arranged at uniform intervals; each longitudinal grid strip contains a drainage pipe arranged along its length, the cross-sectional area of ​​the drainage pipe being ≥10mm². 2 Each transverse grid band contains capillary tubes along its length, maintaining communication with the upper part of the drainage pipe wall. The capillary tubes have a diameter of 0.5~1.0mm and are arranged in multiple evenly spaced rows along the width of each transverse grid band. At the bottom of the capillary tubes located between adjacent longitudinal grid bands, a strip-shaped capillary suction port with a width of 0.3~0.5mm is formed along its length. The advantages of this invention are that it significantly improves water absorption and drainage speed, accelerates soil drainage and consolidation, reduces seepage pressure within the soil, improves soil stability, and extends the service life of the geogrid.

The present application relates to a kind of rock-socketed foundation bearing capacity compensation design method considering rock mass constraint, comprising: establishing rock-socketed foundation calculation model, determine its consolidation boundary condition in rock layer;Calculate the horizontal soil resistance of triangle distribution produced when foundation rotates;Solve the resisting moment of horizontal rock resistance to base center;The deformation of base is decomposed into integral subsidence and rotating component;Determine the calculation formula of base zero stress point position, and establish base vertical pressure distribution model;Establish the overall balance equation group, and solve the foundation rotation angle and zero stress point position by iteration calculation;Calculate the maximum compressive stress of base and evaluate the bearing capacity compensation effect;Finally, section internal force analysis and reinforcement design are carried out.The present application provides additional resisting moment by quantifying rock mass constraint, effectively reduces the maximum compressive stress of base, provides theoretical basis and technical support for improving foundation bearing capacity and optimizing foundation size, and is especially suitable for rock-socketed foundation design in high intensity seismic region.

The invention relates to the technical field of earthen archaeological site ramming and supplementing, in particular to an earthen archaeological site layered ramming and supplementing method and system for resisting moisture and freeze thawing, and the method comprises the steps: constructing an earthen archaeological site digital model, obtaining a ramming and supplementing material group according to a homologous soil material and a preset moisture and freeze thawing resistant material group, and preparing an optimal fusion soil material based on a material ratio constraint condition, and identifying a to-be-tamped area group in the to-be-tamped earthen site based on the earthen site digital model, carrying out chemical solidification on the to-be-tamped area group by using a chemical reinforcement solution to obtain a target tamped area group, and carrying out multilayer tamping on the target tamped area group by using the optimal fusion soil material, the dynamic deformation modulus tester and the rammer to obtain a tamped area group. According to the method, the durability of the rammed complement and the compatibility of the original ruins can be improved, and the repeated repair risk caused by material degradation or interface failure is reduced.

The invention discloses a reverse vacuum preloading reinforcing system and a construction method. The system comprises a reverse vacuum preloading unit and a closed operation cavity unit. The reverse vacuum preloading unit comprises a prefabricated horizontal drainage body arranged at the bottom of the soft soil layer, a vacuum main pipe arranged in the prefabricated horizontal drainage body and led out upwards, a plurality of vertical drainage plates and a geotextile and geomembrane sealing layer covering the surface of a treatment area. The bottom end of each vertical drainage plate and the prefabricated horizontal drainage body are bound in advance to form a grid-shaped integrated drainage structure. The closed operation cavity unit is integrally sunk or constructed in a soil body, a plurality of vacuum pumps are arranged in the deep part in the closed operation cavity unit and connected with a vacuum main pipe through a quick connection structure, and a water suction pump is arranged at the top and used for timely draining accumulated water in the cavity. According to the system, negative pressure acts on a bottom drainage channel in a deep near field, the negative pressure transmission distance is shortened, on-way attenuation is reduced, and the consolidation efficiency and vacuum stability of deep saturated soft soil are improved through bottom short-path drainage.

The present application belongs to the field of geotechnical engineering and underground structure engineering, and provides a consolidation settlement calculation method suitable for composite foundation of immersed tunnel. The present application divides the foundation system into three sub-domains of gravel cushion, pile-soil reinforcement area and underlying soft soil area. The external load first acts on the top surface of the cushion, and then is transmitted to the composite foundation in layers from the cushion. The cushion is explicitly introduced into the settlement calculation system as an independent compressible unit, and is strictly connected in series with the consolidation calculation of the underlying "reinforcement area + underlying layer". Compared with the traditional calculation method which only regards the cushion as a "rigid uniform load plate" or directly ignores its deformation, the present method can quantify the settlement contribution of the cushion itself, reveal the coordination relationship among the cushion, the composite foundation and the underlying layer in deformation, and thus make up for the important gap in the existing consolidation settlement theory of composite foundation that "only soft soil is calculated without considering the cushion".

This invention provides a method for predicting the degree of consolidation and settlement of soil using a horizontal drainage board combined with vacuum preloading. By acquiring the basic parameters of the target soil, the design parameters of the target project, and the vacuum front height, the average pore pressure is calculated based on the consolidation coefficient, water unit weight, initial hydraulic gradient, vacuum load magnitude, maximum drainage distance, and vacuum front height. The average degree of consolidation of the target soil is then calculated by combining the average pore pressure and the vacuum load magnitude. Finally, the settlement of the target soil is calculated by combining the average pore pressure, initial void ratio, compression index, initial effective stress, and maximum drainage distance. This invention can effectively predict the average degree of consolidation and settlement of soil subjected to drainage and consolidation treatment using a horizontal drainage board under vacuum conditions. The prediction results can provide a theoretical basis for the design method of using horizontal drainage boards to treat river silt.

The application relates to a soft soil foundation high-pressure grouting treatment device and process and relates to the technical field of foundation grouting. The device comprises a moving mechanism, the moving mechanism comprises a moving platform and a plurality of driving wheels, the surface of the moving platform is provided with a construction wheel disc, the construction wheel disc is rotationally arranged relative to the moving platform, the surface of the construction wheel disc is provided with a high-pressure pump body and a driving piece, the construction wheel disc is provided with a lifting hole penetrating through in the thickness direction, a guide pipe is arranged in the lifting hole, the driving piece drives the guide pipe to lift along the lifting hole, the guide pipe is communicated with the high-pressure pump body, one end of the guide pipe is provided with a drill bit; the construction wheel disc is also provided with a soil consolidation hole penetrating through in the thickness direction, a soil consolidation anvil is arranged in the soil consolidation hole, the surface of the construction wheel disc is provided with a driving assembly for driving the soil consolidation anvil to lift; the moving platform is provided with a construction hole penetrating through in the thickness direction, and the construction wheel disc is rotationally driven to align the lifting hole and the soil consolidation hole with the construction hole. The application has the effects of tamping the soft soil layer, improving the stability and safety of grouting construction.

The invention relates to the field of exploration, and particularly discloses a method and device for measuring the permeability coefficient of an in-situ soil body, computer equipment and a readable storage medium, and the method comprises the following steps: obtaining a plurality of soil samples with preset burial depths, and obtaining the initial void ratio of each soil sample; carrying out a consolidation test on the soil samples to obtain the compression amount, the total compression amount and the test value of the consolidation coefficient of the sampling point of each soil sample under a plurality of preset consolidation pressures per minute; based on the initial void ratio, the preset burial depth, the preset consolidation pressure, the compression amount per minute, the total compression amount and the consolidation coefficient test value of the sampling point of each soil sample, a permeability coefficient prediction model is obtained by combining a fitting algorithm; and obtaining the burial depth and the corresponding pressure of the to-be-predicted soil body, and calculating the permeability coefficient of the to-be-predicted soil body based on the permeability coefficient prediction model. According to the method provided by the invention, sampling is carried out in soil layers with different burial depths, so that the real state of the soil body in the in-situ stratum can be restored, and the reliability and accuracy of a prediction result are remarkably improved.

The application provides a double-line shield tunnel optimization design method, device and equipment considering soil-water-structure coupling, and relates to the technical field of underground engineering and tunnel engineering. The method comprises the following steps: obtaining a construction stage stratum displacement field considering double-line mutual disturbance; establishing a groundwater seepage model to obtain a pore water pressure distribution and determine a consolidation additional displacement field; superimposing the construction displacement field and the consolidation additional displacement field to obtain a comprehensive stratum displacement field; analyzing the internal force and deformation response of the lining structure based on the comprehensive stratum displacement field; determining design indexes according to the response; if the design indexes do not meet the preset allowable value, adjusting the design parameters and repeating the above steps until all indexes meet the requirements. The application takes the stratum displacement field as a unified carrier, realizes continuous transmission and closed-loop optimization of construction effect, consolidation effect and structure response, and improves the reliability and consistency of double-line shield tunnel design.

A kind of construction method of water side slope geotechnical mould bag structure, comprising the following steps: S1: geotechnical mould bag is extended and is pressed into the slope top inclined plane and is fixed with U-shaped nail;S2: positioning steel pipe and positioning steel pipe connection are respectively driven in slope top and slope bottom;S3: geotechnical mould bag is filled simultaneously above and below water, flocculating agent is added to fast consolidation below normal water level line, and regular shape geotechnical mould bag is laid above normal water level line;S4: fill the filling hole of polygon shape on geotechnical mould bag and fill self-compacting soil, and high-pressure filling forms spherical expansion body;S5: diver ensures that the nylon rope sleeve is sleeved into the positioning steel pipe of slope top and slope bottom, and ensures that geotechnical mould bag is stably positioned;S6: diver carries out underwater adjustment to the bedding and each part connection of geotechnical mould bag, and ensures that bag body is tightly combined.The stability of the structure is effectively improved by high-pressure grouting technology, water flow impact can be resisted, and slope collapse can be prevented.

The utility model discloses a soft soil compressed air water collection and drainage foundation treatment device which comprises a gas diffusion cavity compressed air pipe, a water drainage compressed air pipe and a water drainage pipe, a water collection cavity, a water drainage cavity and a gas diffusion cavity are respectively embedded in a soft soil foundation, the water collection cavity is arranged on the periphery of the gas diffusion cavity, and the water drainage cavity is arranged on the periphery of the gas diffusion cavity. The gas diffusion cavity and the water collection cavity are flush in position and are both located above the water drainage cavity. The gas diffusion cavity is connected with a compressed air pipe, and the compressed air pipe extends out of the earth surface in the vertical direction of the soft soil foundation and communicates with an inflator pump; the drainage cavity is connected with the water collection cavity, a drainage compressed air pipe and a drainage pipe, and the drainage compressed air pipe extends out of the earth surface in the vertical direction of the soft soil foundation and communicates with an inflation pump. Through the arrangement of the air compression, water collection and drainage devices, high-efficiency drainage of the soft soil foundation in a large range can be achieved, the drainage consolidation time of the soft soil foundation is greatly shortened, the shear strength of a soil body is enhanced, and post-construction settlement of the soft soil foundation is reduced.

The invention discloses a soft soil consolidation model test system for constructing a multidirectional drainage channel through high-pressure sand blasting. The system comprises a supporting unit, a high-pressure spraying unit and a loading unit, a rotating base is arranged at the bottom of the supporting unit, and the model test box is driven to rotate through the rotating base; the high-pressure jetting unit is used for being installed on the upper portion of the supporting unit and comprises a lifting rack, a sand blasting pipeline is installed on the lifting rack and synchronously ascends and descends along with the lifting rack, and then the sand blasting pipeline can be inserted into soft soil of the model test box in the supporting unit to conduct sand blasting; an L-shaped nozzle is arranged at the bottom of the sand blasting pipeline, the rotating angle of the model test box is adjusted by rotating the base, and transverse sandy drainage channels can be arranged in different directions. The loading unit is used for being installed on the upper portion of the supporting unit to apply load to soft soil in the model test box. According to the invention, the dynamic process and the drainage consolidation environment of constructing the multidirectional sandy drainage channel in soft soil in a laboratory are simulated.

The invention provides a high earth and rockfill dam core wall pore water pressure test method, and belongs to the technical field of indoor soil mechanics tests. According to the method, the structure of a traditional compression consolidation apparatus is improved, a sealing steel barrel which is provided with a double-layer sealing ring and can lead out a wire harness is adopted, and a high-precision osmometer, a soil pressure meter and a high-frequency data acquisition system are combined, so that the compression consolidation apparatus can be fully sealed under the conditions of complete sealing and high pressure; and the generation and change rule of pore water pressure in the filling process of the core wall of the high earth-rock dam can be accurately simulated. The method comprises the steps of soil sample preparation, saturation treatment, instrument burying, graded loading, data acquisition and the like, and can be used for researching the influence of different water contents, loading rates and clay content on the pore water pressure. Test results show that the method can still keep good sealing and data stability under the condition of 5 MPa high pressure, has high precision, high repeatability and high reliability, and can provide scientific basis for high earth and rockfill dam core wall design and construction safety.

The application discloses a kind of test device and its using method for determining soil body humidification deformation, the device includes sealed container, ring knife sample consolidation container placed in the bottom of sealed container, vertical loading device, micrometer and saturated salt solution storage device;The upper portion of the ring knife sample consolidation container is connected with vertical loading rod, and the vertical loading device is circumscribed to the loading rod, and the micrometer is installed on the loading rod;The saturated salt solution storage device is communicated with the bottom of sealed container.The application injects saturated salt solution in the bottom of closed container, accurately controls the suction of soil sample by using saturated salt solution vapor equilibrium, gradually humidifies soil sample by replacing saturated salt solution type under the condition that upper load remains constant, and determines the humidification deformation of soil under different humidification degrees by using the same sample;Meanwhile, the application can also gradually increase vertical load while keeping saturated salt solution type unchanged, to determine the compression deformation characteristics of soil under certain suction condition.

The invention belongs to the technical field of foundation construction, and particularly relates to a construction method for hydraulic reclamation of a superfine-grained soil foundation by synergistically utilizing and treating multi-element solid waste, which comprises the following steps: in an early-stage preparation stage, accurately preparing materials, mixing, adding and stirring all the materials to form a precipitation mixture, paving a foundation bottom layer on the precipitation mixture, and arranging a PVC precipitation well wrapping anti-blocking material at the same time; a water suction pump is installed in the dewatering well and used for draining water from the foundation; all the materials are mixed and added into gypsum slurry to prepare a softer first-stage consolidation material, all the materials are mixed and added into gypsum slurry to prepare a harder second-stage consolidation material, the first-stage consolidation material is laid on a foundation in a layered mode and maintained for 3 days, then the second-stage consolidation material is laid on a first-stage consolidation layer, and consolidation is completed when the pore water pressure dissipation rate is larger than or equal to 85% through maintenance; the method is high in precipitation efficiency, good in solidification effect, high in solid waste utilization rate and low in cost.

The present application belongs to the technical field of foundation treatment, and discloses a kind of silt foundation grouting lifting construction method of combined drainage consolidation.Solve the problem of secondary settlement caused by excess pore water pressure dissipation after silt foundation grouting lifting in the prior art.The present application comprises: construction preparation and site investigation;Lay vertical drainage channel, vertical drainage body penetrates silt layer or enters the relatively permeable soil layer below silt layer, and the top end is exposed to the ground;Sand cushion layer is laid on the top end of vertical drainage body or horizontal drainage pipe network is laid;Lay grouting hole, in the area to be lifted, several grouting holes are laid at a predetermined interval, vertical drainage body is located at the center position of grouting hole grid, the depth of grouting hole reaches the design lifting horizon, and grouting pipe is lowered into grouting hole;Pressure grouting lifting and synchronous drainage;Pressure stabilization and maintenance.The present application realizes synchronous and collaborative operation of grouting lifting and drainage consolidation, improves the stability and controllability of lifting effect.

The invention discloses a method and device for determining the well wall thickness of a deep soil wellbore and a medium, and relates to the field of geotechnical engineering of the civil engineering disciplinary .The method comprises the steps that a high-pressure-side pressure coefficient creep test is conducted on deep soil through a high-pressure-side pressure coefficient consolidation apparatus; the curve of the deep soil lateral pressure coefficient changing along with different depths and the curve of the deep soil lateral pressure coefficient changing along with different consolidation pressures are obtained; the curve of the deep soil side pressure coefficient changing along with different depths and the curve of the deep soil side pressure coefficient changing along with different consolidation pressures are fitted, an expression of the curve of the deep soil side pressure coefficient changing along with the depths and the consolidation pressures is obtained, and the expression is applied to calculation of a horizontal ground pressure value acting on the well wall. The maximum value of the horizontal ground pressure acting on the well wall is obtained; and according to the maximum value of the horizontal ground pressure acting on the well wall, the minimum well wall thickness allowed to be designed by the shaft is obtained. The method can improve the precision of determining the thickness of the shaft of the deep soil.

The application discloses a kind of vacuum stirring and soil sample preparation integrated intelligent device and method, including stirring device, consolidation sample preparation device, vacuum pumping device, intelligent control system.Stirring device is used to stir soil sample into uniform mud;Consolidation sample preparation device is used to prepare remolded soil sample;Vacuum pumping device ensures that the internal environment of overall test is in vacuum state;Intelligent control system realizes intelligent staged loading to consolidate soil sample in stages.The beneficial effects of the scheme provided by the application are that: by vacuum pumping device, ensure that mud is in vacuum state during stirring and transportation to consolidation sample preparation device, effectively reduce the air content in remolded soil sample, in the process of soil sample consolidation forming, the pore water pressure and effective stress of soil sample are calculated in real time by means of intelligent control system, the degree of consolidation is accurately controlled, the load size is accurately controlled intelligently, automatic staged loading is realized, complete soil sample consolidation settlement curve can be obtained, and soil test is carried out in detail.

This application relates to a reinforcement structure and construction method for existing retaining walls, belonging to the field of geotechnical engineering reinforcement and geological disaster management. For soil containing slip surfaces and adjacent retaining walls, a borehole is drilled at a downward angle extending to the far side of the slip surface. A hollow reinforcement rod is inserted into the borehole, equipped with a pressure-responsive barrier to divide the soil into a permeable consolidation zone and a high-strength anchoring zone. A return hole is provided at the borehole end, and a hydrophilic capillary core bundle is arranged inside the rod to reversibly draw out and vaporize water accumulated at the bottom of the borehole. This structure achieves integrated drainage and reinforcement design through a single borehole. The permeable consolidation zone releases hydrostatic pressure behind the wall, alleviating overload, while the high-strength anchoring zone ensures the soil and rod are anchored to resist slip instability and extend the structural lifespan. The capillary core bundle specifically solves the problem of water accumulation in the dead corner of the downward-angled borehole, achieving the goal of synergistic effect between drainage and reinforcement.

The invention provides a rapid visual intelligent feedback measurement method and equipment for the compaction degree of a soil body structural surface, a vehicle body platform transmits vibration force to a road rolling wheel in the walking and rolling process, and the vibration frequency and the vibration force are adjusted in real time. The combined sensors are arranged on the surface of the road rolling wheel, and side wall pressure and shear wave velocity of the sensors are collected in the rolling process. The infrared measuring device is used for collecting soil temperature data in real time in the pavement rolling process; the visual host device is used for converting the soil temperature data into water content by utilizing a temperature and water content model based on the soil temperature data; the compaction degree of the rolling working face is calculated on the basis of the sensor side wall pressure and the shear wave velocity in combination with the water content and the soil consolidation coefficient, the vibration frequency and the vibration force are adjusted according to the compaction degree so as to adapt to the ground with different soil compaction degrees, and data visualization is achieved. According to the invention, rapid feedback and rapid adjustment in the soil body rolling process are realized, the workload of manual sampling is reduced, and the rolling construction efficiency of a project is improved.

This invention discloses a method for preloading soil and controlling the stability of dikes in soft soil foundations during land reclamation, belonging to the field of soft soil foundation treatment technology. Addressing the technical problems of drainage boards easily twisting and breaking, poor reinforcement effects due to unloading rebound, and dike slope instability in newly reclaimed ultra-soft soil foundations, the method includes: sequentially performing a first vacuum preloading followed by staged soil surcharge preloading to control settlement and displacement rates; stopping the vacuum and removing all soil surcharge after the consolidation degree meets the standard; installing a second set of drainage boards on the unloaded foundation surface, arranged in a staggered pattern with the first set; repaving the drainage system and initiating a second vacuum preloading without soil surcharge until the settlement rate, consolidation degree, and vane shear strength meet design requirements. This invention eliminates the uneven defects caused by drainage board failure during the first reinforcement through secondary reinforcement with inserting plates, effectively improving the overall shear strength and stability of the foundation. It is mainly used for deep reinforcement of soft soil foundations during land reclamation and for dike slope stability control.