75 results about "Suction stress" patented technology

The application relates to a suction cylinder sinking resistance calculation method and relates to the technical field of suction cylinder foundation construction, which comprises the following steps: calculating the clay content index of a clay-sand mixed soil layer by using a pore pressure static sounding test structure; calculating the upper limit value of the side resistance coefficient of the suction cylinder, the lower limit value of the side resistance coefficient of the suction cylinder, the upper limit value of the end resistance coefficient of the suction cylinder and the lower limit value of the end resistance coefficient of the suction cylinder according to the clay content index; and calculating the first sinking resistance based on the above resistance coefficients and by using a formula. The application establishes a suction cylinder sinking resistance calculation method for the clay-sand mixed soil layer, clearly defines the quantitative relationship between the clay content index of the clay-sand mixed soil layer and the sinking resistance coefficient (including the end resistance coefficient and the side resistance coefficient), solves the problem that the calculation parameters of the suction cylinder sinking resistance in the clay-sand mixed soil layer are not clear in the existing norms, and improves the accuracy of the sinking resistance calculation result.

The invention discloses a slope stability prediction method in heavy rainfall weather, and relates to the technical field of road slopes. The method comprises the following steps: collecting soil characteristic data before and after rainfall in a road slope sub-region, and fitting a water-soil characteristic function and a saturated permeation function through a least square method; the method comprises the following steps: establishing a road slope three-dimensional model by using a laser radar, obtaining soil parameters of each point of the road slope three-dimensional model based on an inverse distance square weighting method, and obtaining simulated initial soil matrix suction and simulated initial unsaturated permeability coefficients; simulating moisture movement through an unsaturated seepage control equation to obtain simulated soil moisture saturation and simulated pore water pressure of each point, screening risk points through a preset threshold value, and generating risk clusters through density clustering; and searching a potential sliding surface in the risk cluster by adopting a particle swarm optimization algorithm, calculating the safety coefficient of the sliding surface in combination with a soil strip method, and quantifying the area of the sliding surface. And fusing the safety coefficient and the area proportion to calculate a slope risk index and divide stability grades.

The invention discloses an intelligent stability control method, system and device for a red soil slope, and relates to the technical field of monitoring control, and the method comprises the steps: S1, constructing a multi-scale hydraulic-mechanical coupling model and a special parameter library for red soil; s2, monitoring and collecting data information in real time; s3, the seepage-deformation coupling behavior of the slope and the shearing strength of unsaturated soil are analyzed; s4, dynamically predicting an air inlet value parameter alpha (t) and slope suction evolution, and updating a safety coefficient; s5, predicting seepage and deformation response of the side slope; s6, correcting the parameters of the special parameter library for the red layer soil, and returning to S2; s7, triggering a dynamic control module according to the safety coefficient; s8, adjusting the control measures according to the safety coefficient; s9, an executing mechanism corresponding to the dynamic control module works according to the adjusted control measures, and the step S2 is executed again; according to the method, the slope stability evaluation precision and the control efficiency are remarkably improved, and an efficient, intelligent and sustainable solution is provided for red soil slope disaster prevention and control.

The present application relates to a kind of suction bucket foundation multidirectional coupling bearing capacity evaluation method considering associated plastic flow of marine clay.The method is based on the associated flow characteristics of undrained clay plastic material,firstly, the numerical model of static loading of suction bucket foundation in undrained clay is established;Secondly, by displacement probe method, the bearing capacity of foundation under different proportional displacement loading is obtained;Finally, based on the rule of associated plastic flow, the same as the outer normal of bearing capacity envelope surface and displacement increment direction vector is used as the criterion, the bearing capacity envelope surface of suction bucket foundation (i.e. the maximum bearing capacity of foundation under multidirectional coupling load) is determined.Compared with prior art, the present application has the effect of considering the associated plastic flow of undrained clay plastic material, the method has clear physical meaning and is easy to implement, and can solve the problem that the existing model cannot accurately evaluate the bearing capacity envelope surface.

The invention relates to the technical field of ocean energy development, in particular to an underwater suction pile foundation rock-soil spring stiffness analysis method considering the heterogeneous characteristic of sea soil. The method comprises the following steps: S1, establishing a shear modulus depth change model based on a sea soil heterogeneous characteristic, and introducing a rigidity dimensionless parameter to perform regularization processing in consideration of a wall thickness factor of a suction pile apron board; s2, based on a Doherty method, estimating a stiffness dimensionless coefficient group in each direction of the spring through linear interpolation; s3, calculating the dimensionless rigidity values of the springs in all directions based on the rigidity dimensionless coefficient groups in all directions obtained in the S2; and S4, based on the calculation result of S3, converting the dimensionless stiffness value into the actual spring stiffness with dimensions through a dimensionalization formula. By establishing the model of which the shear modulus changes along with the depth, the actual heterogeneity of sea and soil can be reflected more accurately, so that the accuracy of predicting the bearing behavior of the suction pile foundation is improved.

This utility model discloses a device for measuring changes in matrix suction gradient, including a soil tensiometer body; a clay head is fixedly installed at the bottom of the soil tensiometer body, an electronic tensiometer is fixedly installed at the end of the soil tensiometer body away from the clay head, and a water inlet pipe is fixedly installed on one side of the soil tensiometer body, communicating with the soil tensiometer body, with a threaded cap threaded onto the water inlet pipe; this utility model, by fitting two semi-circular chucks onto the soil tensiometer body and fixing the two semi-circular chucks with pins, places the end of the support rod away from the semi-circular chucks on the ground, and inserts the rod into the support rod insertion hole to limit and fix the fixing plate, the cooperation of the support rod and the semi-circular chucks can provide support for the soil tensiometer body, preventing it from tilting due to collisions with external objects, making the device safer when continuously monitoring outdoors, and allowing the clay head at the bottom of the soil tensiometer body to maintain stable contact with the soil.

The invention discloses a device and method for measuring a relative permeability curve of a soil body, the device comprises a cutting ring, a sleeve, a stainless steel electrode, a water delivery module, a vacuum drying system and a resistivity acquisition control module, the resistivity is monitored in real time through an electrode hole, and a sealing structure ensures that the system is stable. The method is based on an unsaturated seepage and electrical conduction theory and comprises the following steps: firstly drying a soil sample, then injecting water, collecting resistivity data, inverting a soil-water characteristic curve through a resistivity-moisture content-matric suction relation model, calculating a permeability coefficient in combination with a Darcy law, and fitting to obtain a permeability curve. The device and the method overcome the limitation that a traditional experiment is tedious in operation and prone to interference, have the advantages of being portable, easy and convenient to operate, high in automation degree, suitable for field measurement and the like, and can achieve efficient and accurate measurement of the permeability characteristic of the unsaturated soil body.

This invention relates to the field of slope stability analysis technology, and in particular to a method, device, and storage medium for measuring the stability of unsaturated soil slopes. The unsaturated soil slope stability measurement method of this invention is based on the soil-water characteristic curve of unsaturated soil and uses the finite element method to solve the Richards equation to obtain the transient seepage field distribution of the unsaturated soil slope. This method is more consistent with reality than the seepage field assumed by empirical formulas in the past. While the SMP criterion proposed by Songgang-Zhongjing considers the influence of intermediate principal stress, the SMP criterion is only suitable for cohesive soil failure criteria. Therefore, this invention modifies the SMP criterion by considering the influence of cohesion, friction angle, and matrix suction, making it applicable to unsaturated cohesive soil slopes. Based on the calculation of the slope's self-weight stress, and using a modified SMP material model, we conduct stability analysis of unsaturated soil slopes using the strength reduction method, considering the influence of the intermediate principal stress of the soil, resulting in more reasonable results.

The present disclosure provides an apparatus and a system of removing sand to prevent sand encroachment. In an embodiment, the apparatus can include a main arm (101), a movable arm (102) connected to one end of the main arm (101), and a plurality of flexible robotic arms (103) connected to the movable arm (102). The plurality of flexible robotic arms (103) can include a suction end with vacuum means for suctioning out grains of sand from a location.

The invention discloses a drilling and fixing integrated drilling device and method for a deep sea natural gas hydrate exploitation system. The drilling device comprises a hollow drill rod, a plurality of continuous pipe separation units and a hollow drill bit which are fixedly connected from top to bottom in the axial direction, and according to the method, the multi-well guiding suction anchor, the rope soil taking equipment, the drilling device and the seabed drilling machine are lowered to a seabed to be positioned and leveled through a small and medium-sized workboat and are fixedly connected with the multi-well guiding suction anchor; the seabed drilling machine controls the drilling device to drill along the multi-well guide suction anchor, and the rope soil taking equipment takes soil; and the pipe is replaced until the target depth is drilled, the drilling device conducts self well cementation and well completion through the self-expansion packer and the pre-filled gravel screen pipe, and the drilling device is completed after equipment is recycled. The device has continuous and integrated operation capacity of well drilling, soil taking, well cementation and well completion, the cost is effectively reduced, the efficiency is remarkably improved, rapid construction, convenient well cementation and economic well completion of a deep sea hydrate mining system are achieved, and a new thought and method are provided for safe and efficient mining of deep sea hydrates.

This invention discloses a centrifuge testing and observation system suitable for suction anchors. The system includes a test foundation and a suction anchor model housed inside a model box, a pulley support assembly on the upper part of the model box, a camera support, a laser displacement measurement assembly, a horizontal loading mechanism, and a support frame. The horizontal loading mechanism connects to the anchor point of the suction anchor model via rigging and the pulley guide frame, thereby achieving model loading. This experimental device has wide applicability, is not limited to any type of test foundation, and the height and position of various support components can be adjusted at any time according to the soil height of the model box and the required loading angle. The system is equipped with a T-bar or CPTu, a laser displacement sensor, a pore pressure gauge, and an accelerometer, enabling precise and diverse measurements of soil strength, soil settlement, pore pressure within the test foundation soil, and model movement. It can efficiently and conveniently observe the dynamic response of the suction anchor and the response of the test foundation soil.

The utility model belongs to the technical field of dam desilting, and discloses a desilting treatment device for a dam in water conservancy and hydropower engineering, which comprises a dredge pump, an additional cylinder is fixedly mounted at the output end of the dredge pump in a sleeving manner, and an insertion plate is fixedly mounted at the port of the additional cylinder. The water pump, the additional barrel, the measuring pipe and the like are arranged, during connection, the additional barrel provided with the dredge pump is obliquely connected to the digging arm of the digging machine, and when the additional barrel is close to the bottom of a reservoir, gravels above sludge can be discharged out of the digging arm through huge suction force generated by the dredge pump, so that the sludge can be discharged out of the digging arm of the digging machine, and the water pump is fixedly installed at the bottom of the side, close to the dredge pump, of the additional barrel. The sludge enters the additional cylinder firstly, then the inserting plate is inserted into the sludge and horizontally moves, the sludge enters the additional cylinder and is conveyed to the outside through the sludge suction pump, and at the moment, harmful substances on the two sides of the additional cylinder are extracted when the sludge is excavated through the water pump and the measuring pipes installed on the two sides of the additional cylinder; and the influence of diffusion of harmful substances on water resources during desilting is reduced.

The present invention relates to a suction-type foundation and a sinking method, comprising a barrel body, wherein the barrel body is provided with a track extending up and down; a counterweight block, wherein the counterweight block is provided in the barrel body, wherein the counterweight block is a water-permeable counterweight block, and wherein the edge of the counterweight block is provided with a pulley which is slidably connected to the guide of the track; and a water retaining block, wherein the water retaining block is fixedly provided at the bottom of the counterweight block, wherein the water retaining block has a first form for preventing water from passing through and a second form for dissolving in water after being soaked in water for a certain period of time, and a gap for water to pass through is reserved between the edge of the water retaining block and the inner wall of the barrel body, so that when the water retaining block is in the first form, the gap forms a concave opening. The suction-type foundation of the present application is conducive to reducing the sinking resistance on the inner side of the foundation, avoiding the loosening of the soil inside the foundation to form super-high soil plugs and pipe bursts, and preventing the problem of not being able to sink to the designed depth and affecting the service performance of the suction-type foundation.

The device mainly comprises a high-pressure cutting assembly and a vacuum slag suction assembly, the high-pressure cutting assembly comprises a high-pressure cutting water gun and a high-pressure pump connected with a background, the high-pressure pump outputs high-pressure jet water flow to cut a soil layer, and crushed sludge is deposited to the bottom of a groove; the vacuum slag suction assembly comprises a vacuum suction pump and a connected sludge suction pump pipe, the sludge suction pump pipe is vertically arranged at the bottom of the foundation trench, sludge which is dispersed to the bottom of the trench through hydraulic force can be immediately sucked away and conveyed to the settling tank through a pipeline for secondary treatment, and clear water separated from the settling tank can be recycled to a high-pressure pump for recycling. And the precipitated slurry is transported outwards by a closed container or is transported outwards by dry soil after further dehydration. According to the technology, the foundation trench section conforming to the set shape is excavated through cyclic operation of hydraulic cutting, trench bottom precipitation and vacuum suction removal, compared with traditional mechanical excavation, disturbance-free hydraulic cutting excavation is adopted in the technology, the excavation range can be accurately controlled, interference to the surrounding environment is extremely small, the risk of violent accidental injury to original underground infrastructures is greatly reduced, and the construction efficiency is improved. The method is particularly suitable for being implemented in a complex environment with densely-distributed pipe networks, and is an efficient and safe non-destructive excavation method.

This utility model discloses a casting sand separation device, relating to the field of sand casting technology, including a collection box; the top of the collection box is equipped with a tilt adjustment component, and a secondary box is set on one side of the collection box; a dust suction component is set on the top of the tilt adjustment component and the secondary box; this utility model, by setting a dust suction component on the top of the tilt adjustment component and the secondary box, allows dust to enter the air chamber through air holes according to the principle of air pressure difference. Under the continuous push of the negative pressure airflow, the dust entering the air chamber will converge along the internal channel of the air chamber towards the connecting pipe, which can ensure that the dust suction force is uniform in all positions within the dust cover area, effectively limit the diffusion range of dust, confine the dust inside the dust cover, improve the dust capture efficiency of the air holes, and at the same time, the equidistant design of the air holes ensures the uniform distribution of adsorption force, avoiding the accidental suction of molding sand particles due to excessive local suction force, or the dust residue due to insufficient local suction force.

The invention provides an unsaturated sandy soil-shaped two-long granite slope stability analysis method, and relates to the technical field of unsaturated soil mechanics and engineering geology, and the method comprises the following steps: correcting a BC water retention function model through a first correction parameter, and constructing to obtain an unsaturated sandy soil water retention function model; correcting the BC permeability coefficient model according to the second correction parameter, and constructing to obtain an unsaturated sand permeability coefficient model; and analyzing the stability of the two-long granite slope by combining the unsaturated sand water holding function model and the unsaturated sand permeability coefficient model to obtain a stability analysis result. According to the method, the traditional BC water holding function and permeability coefficient model is improved by using the first correction parameter and the second correction parameter, and the residual value is used for replacing a film flow parameter which is difficult to predict in the previous model, so that the suction range is expanded, and the unsaturated slope formation mechanism is analyzed.

The invention discloses a suction bucket bearing capacity test device and test method based on soil reinforcement. The suction bucket bearing capacity test device comprises a model box, a suction bucket model, a negative pressure generation assembly, a grouting reinforcement assembly, a loading assembly and a monitoring assembly. A test soil body and a soil surface fluid are arranged in the model box; the negative pressure generation assembly is suitable for forming negative pressure in the suction bucket model, so that the suction bucket model is injected into the test soil body under the negative pressure; the grouting reinforcement assembly is suitable for injecting reaction liquid into a soil body in the suction bucket model; the loading assembly is suitable for applying a load in a vertical direction or a horizontal direction to the suction bucket model; the monitoring assembly is suitable for monitoring mechanical parameter changes of the suction bucket model and the test soil body in real time in the test process. According to the invention, the complete process of building a suction bucket foundation and reinforcing a soil body in a seabed environment can be simulated, and a test device and a test method for related research are provided.

The invention discloses an unsaturated sand roadbed filler permanent deformation prediction model and an establishment method thereof. The establishment method comprises the following steps: preparing sand conforming to highway roadbed grading requirements to prepare a sand sample; the permanent deformation curve of the sandy soil sample under different matrix suction, different net confining pressures, different dynamic stress amplitudes and different compaction degrees is measured through experiments; taking a Karg model as a basic framework, introducing matric suction and compactness influence factors, and establishing a prediction model coupled with matric suction, net confining pressure, dynamic stress amplitude and compactness at the same time; and calibrating model parameters by adopting a normalized main curve method to obtain an improved permanent deformation prediction model. According to the method, the permanent deformation of the unsaturated sand roadbed filler can be accurately captured under different matrix suction forces, different net confining pressures, different dynamic stress amplitudes and different compaction degrees, unified description of cross-stress, cross-suction forces, cross-state and cross-soil types is realized, and engineers can conveniently understand and apply the method to actual design.

The utility model relates to soil and groundwater remediation technical field discloses a kind of pulsed pneumatic groundwater extraction processing device, including air compressor, PLC controller and clay sealing layer, the bottom end of the clay sealing layer is provided with quartz sand layer, the inner wall top of the quartz sand layer is fixedly connected with open well pipe, the upper and lower ends of the open well pipe are fixedly connected with real pipe, one end of the air compressor is communicated with air inlet pipe, the other end of the air inlet pipe is communicated with pneumatic extraction device, the bottom end of the pneumatic extraction device is communicated with pumping pipe, the other end of the pumping pipe is communicated with pressure water pipe.In the utility model, by air compressor to generate compressed gas to flow into air inlet pipe, make pneumatic extraction device work to produce suction, when pumping, because there is sealed wellhead in well, when water level in well drops, air pressure reduces, float drops, well is under negative pressure, to improve contaminant capture efficiency, reduce disturbance to groundwater environment.

The utility model discloses a split type suction pile anchoring foundation, which relates to the technical field of ocean engineering and comprises a suction pile structure and a buoyancy tank structure. An apron board structure and a lug plate structure are arranged on the side wall of the suction pile structure; a drainage pipeline penetrates through the top of the suction pile structure and communicates with the interior of the suction pile structure and the water suction pump. A balance weight cabin and a ballast tank are arranged in the buoyancy tank structure, and a pressure discharging and loading system is arranged in the ballast tank; the supporting leg structures are arranged at the bottom of the buoyancy tank structure, and the buoyancy tank structure is pressed on the apron board structure through the supporting leg structures; a first eye plate connected with a mooring rope or a mooring chain is arranged on the outer side wall of the buoyancy tank structure. The technical problems that due to the fact that a traditional suction pile anchoring foundation is limited by the dead weight and the depth of penetrating into soil in the soil conditions such as sandy soil is insufficient, enough pressure difference cannot be generated in the closed space formed by the cylinder wall and the soil in the space outside the cylinder wall, and the suction barrel can reach the preset installation depth and the designed tensile strength and the designed pulling strength are solved.

The invention relates to the technical field of soil body testing, in particular to a maximum shear modulus prediction method based on soil body intergranular stress. The method comprises the following steps: firstly, carrying out a pressure plate instrument test on a soil body sample to obtain a sample soil-water characteristic curve; fitting the soil-water characteristic data of the sample based on a VG model to obtain matric suction of the sample under different saturations; based on a real pore pressure concept, establishing a soil body intergranular stress calculation method considering a physical and chemical effect, and obtaining a change rule of the intergranular stress along with saturation in a soil body dehumidification process; and according to a maximum shear modulus test result in a soil dehumidification process, constructing an intergranular stress-based maximum shear modulus quantitative characterization prediction method. Through conventional pressure plate test and theoretical analysis, quantitative characterization and prediction of the change rule of the maximum shear modulus in the soil dehumidification process are realized.

The application discloses a MICP reinforced flexible protection device suitable for a suction anchor foundation and a construction method. The device comprises a suction anchor and a flexible protection block. The upper side of the flexible protection block is in a mushroom type structure, and the lower side is a plane. The flexible protection block is sleeved on the upper part of the suction anchor during installation. A plurality of pressure sensors are fixedly installed on the lower side of the flexible protection block. A plurality of grouting pipes are inserted and installed on the flexible protection block. The bottom ends of all the grouting pipes are on the same horizontal plane. The top ends of the grouting pipes are distributed along the mushroom type structure of the upper side of the flexible protection block. The application combines biological mineralization and structural bionics technology. The suction anchor surrounding seabed is injected with MICP microbial grouting through the grouting pipes. The bearing capacity of the sand soil surrounding the suction anchor is successfully enhanced. The application breaks through the limitation of traditional rigid reinforcement, improves the construction precision, and guarantees the stability of the whole life cycle of the deep-sea suction anchor foundation.

A pile driving and extraction method that can be used in locations close to buried objects, eliminating the need to expose buried objects or conduct test excavations before driving piles, such as those used in the parent pile and horizontal sheet pile method, into the ground. [Solution] When driving a pile into the ground near a buried object, a casing 5 made of steel pipe is buried in the soil while breaking up the ground with water sprayed from a water jet nozzle 4 located at the tip of the casing 5, the soil and sand inside the casing 5 that has been stirred by the water jet is removed to the surface using a vacuum, the casing 5 is inserted into the soil to a predetermined depth, an H-shaped steel 8 serving as a pile is erected inside the casing 5, the gap between the casing 5 and the H-shaped steel 8 is filled with backfill material 10, the casing 5 is then pulled out, and the pulling out is stopped when the bottom end of the casing 5 is a certain length below the bottom end of the buried object 11, leaving part of the bottom of the casing 5 in the soil.

The application discloses an experimental device for testing maximum suction stress of sand and an experimental method thereof, belongs to the technical field of geotechnical engineering, and solves the problem that the maximum suction stress of sand cannot be measured in the prior art; the experimental device comprises a base fixed on a table top, a channel is formed in the end face of the base; a sample measuring cylinder is horizontally arranged in the channel and used for containing a sand sample; the sample measuring cylinder comprises a first measuring cylinder and a second measuring cylinder which are detachably connected, the second measuring cylinder is located directly below the first measuring cylinder and is slidingly arranged in the channel; and a sample pulling assembly is used for sliding the second measuring cylinder. The experimental device is simple, convenient to operate and clear in principle, the length of the sand sample falling under the action of a self-weight load can be measured, the maximum suction stress of sand under different water contents and relative compactness states can be calculated through a theoretical formula, the method is reasonable, the experiment can be repeated for many times, and the reliability is high.

The invention discloses a suction type foundation soil plug state monitoring system and recoverable monitoring method.The suction type foundation soil plug state monitoring system comprises a pressure stabilizing barrel and a guide pipe, one end of the top of the pressure stabilizing barrel communicates with a suction type foundation through the guide pipe, a soil plug is arranged in the suction type foundation, and the top of the suction type foundation is connected into a sonar scanning system through the guide pipe; the sonar scanning system comprises a retractable sonar installation mechanism and a sonar assembly installed on the sonar installation mechanism. The other end of the voltage stabilizing barrel is connected with a signal processor through a cable, and the signal processor is in communication connection with a computer. The umbrella body is unfolded to drive the sonar body to carry out annular section scanning on the soil plug, the three-dimensional form of the soil plug is reconstructed, and the limitation of single-point measurement is overcome; and after the suction type foundation is injected, the umbrella body is folded, the monitoring equipment is recycled, reutilization is achieved, and the engineering cost is reduced.

The present application relates to the technical field of data prediction, in particular to a swelling soil swelling evaluation model construction method and system, comprising the following steps: collecting wetting and drying cycle data to construct closed state evolution coordinate sequence, using trapezoidal numerical integration algorithm to calculate single cycle hysteresis energy dissipation density, calculating structure damage increment to update structure integrity coefficient, constructing suction stress contribution factor and correcting real-time matrix suction, superimposing to obtain equivalent effective stress, using Lagrange interpolation combined with pore ratio relationship table to calculate pore ratio change and volume expansion rate. In the present application, the structure damage and integrity degradation are quantified by calculating the hysteresis energy dissipation value, the stress state is corrected by constructing the suction stress contribution factor, and the pore ratio change is deduced, thereby establishing a mechanical property prediction system based on energy dissipation and structure evolution, overcoming the limitations of static physical index evaluation, and significantly improving the prediction accuracy and applicability of swelling soil volume deformation.

The invention discloses a suction pile reinforcing device and a reinforcing method thereof. The suction pile reinforcing device comprises a suction pile of which the bottom is in an open state and the top is provided with a sealing cover, a plurality of groups of slurry spraying assemblies which are distributed in the suction pile and on the periphery of the suction pile in an annular array manner and can spray slurry in multiple directions, and a protective cylinder which is fixedly connected with the suction pile and is used for protecting the slurry spraying assemblies, the slurry supply assembly is communicated with the slurry spraying assembly and used for providing slurry, and the lifting assembly is installed at the top of the slurry spraying assembly and used for lifting the slurry spraying assembly. The guniting assemblies in the suction pile and on the periphery of the suction pile are symmetrically arranged, and the protection barrel is of a C-shaped tubular structure with an opening in one side. The slurry spraying assemblies are arranged inside and on the periphery of the suction pile at the same time, the slurry spraying assemblies spray slurry at a high speed to continuously cut soft clay and move upwards at the same time, uniform slurry spraying is achieved, the overall bearing capacity can be improved, the problem that the suction pile cannot sink in place can be solved through the internal slurry spraying assemblies, and the overall bearing capacity is further improved.

The invention relates to the technical field of ecological geotechnical engineering, and discloses a root system simulation device based on 3D printing and a microcosmic support structure, which comprises a root system main body unit which is integrally formed by adopting biocompatible polylactic acid or a composite material thereof through a 3D printing technology and is of a bionic columnar structure with a hollow interior and a closed bottom end, according to the invention, through the collaborative design of the bionic surface, the gradient micropores, the built-in support and the negative pressure driving, the dynamic physical simulation of the water absorption-transpiration process of the plant root system is realized for the first time, and high biological similarity and structural stability are achieved; the device can be widely applied to soil tests such as direct shear, triaxial test and drawing test, is used for researching the influence of vegetation transpiration on soil shear strength, matrix suction and slope stability, fills the technical blank that a traditional root system model cannot reflect the physiological hydraulic effect, and remarkably improves the authenticity and scientificity of an ecological slope protection experiment.

This utility model relates to the field of soil remediation. It discloses a remediation box for soil remediation. It includes a box body with a feed inlet at the top, a conveying chamber below the feed inlet, and a separation chamber on one side, separated by a partition plate. A soil discharge pipe is located at the bottom of the conveying chamber, and a screening port is located at the top of the partition plate. A conveyor belt is located inside the separation chamber, with a magnetic attraction unit on the side away from the screening port and a metal discharge pipe at the bottom. Additionally, a power supply is located outside the box body and electrically connected to the magnetic attraction unit and a control assembly. Soil to be remediated enters the conveying chamber through the feed inlet at the top of the remediation box and moves downwards under gravity. Upon reaching the screening port, the magnetic attraction unit is energized, generating a magnetic force to attract metals in the soil. The metals pass through the screening port into the separation chamber and are attracted to the conveyor belt. As the conveyor belt moves towards the bottom of the separation chamber, the magnetic force on the metal weakens. When gravity exceeds the magnetic attraction force, the metals fall off and are discharged through the metal discharge pipe. This remediation box can efficiently separate metals, improving work efficiency, and the magnetic force can be adjusted to ensure continuous and efficient operation.

The split type suction pile comprises an upper half part and a lower half part, the top of the upper half part is designed to be sealed, the bottom of the upper half part is designed to be open, a suction pump butt joint opening and an exhaust port are formed in the top of the upper half part, a reserved well opening is formed in the center of the interior of the upper half part, and the top of the lower half part is an open type horn mouth. The bottom of the lower half portion is open, a butt joint step and an anti-rotation structure are arranged in the lower half portion, the bottom of the upper half portion can enter the lower half portion and is clamped through the butt joint step and the anti-rotation structure, and hoisting structures are arranged on the outer wall of the upper half portion and the outer wall of the lower half portion respectively. According to the method, the underwater wellhead with excellent stability can be built on the ultra-deep water soft soil surface layer, and follow-up installation of equipment such as a Christmas tree is facilitated.