48 results about "Suction stress" patented technology

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.

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.

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.

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 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 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.

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.

The application discloses a kind of plate pile embedded stability evaluation method of foundation pit considering unsaturated effect.Model test and numerical simulation results show that the failure sliding surface of foundation pit is the combination of curve and straight line, and the combination is not yet applied to the research of unsaturated foundation pit stability at present.Based on the upper limit principle of limit analysis, a kind of horizontal piece half analytical analysis method is proposed, the external power done by unsaturated soil gravity is calculated using this method, and based on the maximum energy consumption principle, the explicit semi-analytical solution of the moment of the lowest way of internal support point by active and passive earth pressure is obtained, and then the stability safety factor of plate pile embedded foundation pit is obtained.The semi-analytical analysis method constructed by the application has the advantages of analytical method and numerical method, effectively combines the unsaturated soil strength theory with limit analysis method, can reasonably explain the strengthening mechanism of suction effect, and has certain practical guiding significance for guiding the design and excavation of foundation pit under complex conditions.

The embodiment of the invention provides a suction type caisson foundation cycle bearing analysis method, system and equipment and a medium. The method comprises the following steps: establishing a cyclic creep element model; the cyclic creep element model is used for describing the accumulated plastic strain of saturated soft clay; introducing dynamic deflection stress and a softening coefficient into the cyclic creep element model to obtain an equivalent cyclic creep model; the equivalent cyclic creep model is popularized to be three-dimensional, and a finite element model of the cyclic uplift bearing capacity of the suction caisson foundation under the cyclic load effect is established; and the finite element model is used for analyzing and calculating the cyclic uplift bearing capacity of the suction caisson foundation. According to the embodiment of the invention, the equivalent cyclic creep model of the soft clay is established by considering the static deflection stress and dynamic deflection stress factors and combining the creep element model, the equivalent cyclic creep model is popularized to three dimensions, a finite element subprogram is developed, and a finite element analysis method for the cyclic uplift bearing capacity of the suction caisson foundation under the cyclic load effect is established.

The present application belongs to the technical field of geotechnical engineering test equipment, and relates to an instrument capable of simulating rainfall infiltration slope shear failure and a working method thereof. The instrument comprises a lower shear box and an upper shear box, the lower shear box is in communication with the inside of the upper shear box, the upper shear box is connected with the output end of a shear loading component, an axial loading component is arranged in the upper shear box, the lower shear box and the upper shear box are both communicated with a water supply device, an axial LVDT sensor, a shear LVDT sensor, a plurality of moisture sensors and a plurality of matric suction sensors are arranged, and the moisture sensors, the matric suction sensors, the axial LVDT sensor and the shear LVDT sensor are all connected with a data acquisition system. The present application can simulate the soil strength deterioration caused by the change of groundwater level and the slope shear failure caused by the change of effective stress, can carry out the creep shear failure and the experiment of effective stress reduction, and can realize the shear of the slope surface with different angles. The experimental data are comprehensive, and the conclusion is reliable.

The invention discloses a multi-field coupling control unsaturated soil direct shear test system and method, and belongs to the technical field of geotechnical engineering. The system comprises a high-pressure sealing pressure-bearing loading host, a shear box assembly integrating a pottery clay plate and a temperature control flow channel, a dual-channel environment control system and a servo loading and acquisition control system. Accurate control of matrix suction is realized by combining a high-pressure closed cavity with an axial translation technology, wide-temperature-range wrapped temperature control is realized through a shear box side wall integrated flow channel, active control of three complex normal boundary conditions of constant load, constant rigidity and constant volume is realized by adopting a normal servo driving module with a built-in sensor, and meanwhile, the normal servo driving module is used for driving the shear box side wall integrated flow channel to control the temperature of the shear box side wall integrated flow channel. Monotonic shearing and cyclic shearing of unsaturated soil are achieved through the horizontal shearing servo driving module. The problem that traditional equipment cannot accurately test static and dynamic characteristics of unsaturated soil in a multi-field coupling environment is solved, and a high-simulation test platform is provided for soil behavior research under complex working conditions.

This invention discloses a simplified analysis method for the heave stability of unsaturated foundation pits. Addressing the heave stability problem of unsaturated foundation pits, a simplified analysis method based on the upper limit principle of limit analysis is proposed. The Prandtl failure mechanism is used to assess the heave stability of the foundation pit, calculating the velocity field of all sliding soil masses and the external power exerted by soil gravity. Based on the velocity field of the sliding soil masses, the total energy dissipation rate caused by the apparent cohesion of the unsaturated soil is calculated, and the safety factor for the heave stability of the foundation pit is obtained based on the principle of increased unit weight. Compared with existing technologies, this invention effectively combines the unsaturated soil strength theory with the limit analysis method, providing a reasonable explanation for the strengthening mechanism of suction effect in the heave stability problem of foundation pits. This has practical guiding significance for the design and excavation of foundation pits under complex conditions.

The application discloses a kind of soil-water characteristic curve acquisition method, system, equipment and storage medium, establish the function relation F (R) of cumulative percentage and particle size R;Determine the component of any particle size Ri belongs to [Ri-△R, Ri+△R];According to the result of S1 and S2, the soil particle quantity corresponding to each component is calculatedAccording to soil particle quantity, the arbitrary pore radius ri corresponding to any particle size Ri is calculated;The cumulative percentage of any pore radius ri less than or equal to a certain pore radius r is calculated, and the volumetric water content of the soil body corresponding to any pore radius ri is calculated according to the cumulative percentage;The matric suction of the soil body is calculated according to any pore radius ri;The relationship between matric suction and saturation is established through any pore radius ri, and the soil-water characteristic curve is obtained.The difference in calculation results caused by the division of random particle groups is eliminated, and the continuous soil-water characteristic curve of different soil bodies, different particle gradation and different compactness can be predicted.

The present invention relates to a set (1) for attachment to a suction device for cleaning a surface comprising - at least one holding element (2), wherein the holding element (2) has at least one handle (3) for guiding the set (1) and at least one suction section (4), - at least one suction pipe (6) that can be connected to the suction section (4) of the holding element (2) in terms of flow characteristics, - at least one cleaning element (5) in the form of a suction brush for picking up dust and dirt particles. In order to provide a set (1) with a cleaning element (5) whose handling is improved compared to the prior art, it is proposed according to the invention that the set (1) is transferable at least between a first position, a second position and a third position, - wherein, when the set (1) is in the first position, the suction pipe (6) is fluidically connected to the suction section (4) of the holding element (2), while the cleaning element (5) is arranged on the suction section (4) of the holding element (2), - wherein, when the set (1) is in the second position, only the cleaning element (5) is fluidly connected to the suction section (4) of the holding element (2) in such a way that dust and dirt particles can be directed via the cleaning element (5) into the suction section (4), - wherein, when the set (1) is in the third position, the cleaning element (5) is arranged at an end of the suction tube (6) facing away from the handle (3), while the suction tube (6) is fluidically connected to the suction section (4) of the holding element (2), so that dust and dirt particles can be directed from the cleaning element (5) via the suction tube (6) and into the suction section (4).

The application discloses a kind of self-adapting multidimensional rectification and collaborative penetration control system and method of suction foundation group.The system is composed of multi-source perception, central control and distributed execution module.The system establishes master-slave collaborative control architecture, the effective soil penetration resistance of bottom of cylinder is real-time inversion through soil resistance soft measurement unit, and geological uneven area is identified in advance.The execution module is configured with two-way fluid control pump station, and differential negative pressure suction sinking is carried out under normal working condition.When extreme soft soil leads to inclination overrun, the pump station on the side of sinking too fast is automatically controlled to switch to positive pressure water injection mode, active jacking torque is generated to rectify powerfully, and anti-pipe heaving protection is assisted.The application effectively solves the problem that suction foundation is prone to irreversible inclination in soft and hard uneven geology, and realizes automatic and high-precision collaborative penetration installation.

The application provides a membrane preparation method, a membrane, a membrane air entry value determination method, a device and a method. The membrane preparation method comprises the following steps: selecting bentonite to prepare a slurry; preparing a mud pipe composite; performing a centrifugal test on the mud pipe composite, recording the height of the soil-water interface of the slurry in the mud pipe composite at different time points and marking the height as h t ; when the deviation of the three continuous measurements h t is less than 1%, the mud pipe composite is taken out, the pipe caps at both ends of the mud pipe composite are removed, and a water-passing air-closing membrane is formed. The membrane air entry value determination method comprises the following steps: cutting one end of the water-passing air-closing membrane according to the soil-water interface and installing a middle filter screen valve, and weighing; performing a centrifugal test on the water-passing air-closing membrane; recording the weight of the water-passing air-closing membrane at the corresponding rotational speed, and when the weight deviation of three continuous times is less than 1%, the weight is weighed, and the height of the interface of the water-passing air-closing membrane is marked as H i ; calculating the sample suction at different rotational speeds; drawing a soil-water characteristic curve to obtain the air entry value of the water-passing air-closing membrane. The method can effectively evaluate the influence of pore structure on the relaxation distribution of liquid-phase pollutants.

The invention discloses a resistance reducing and reinforcing integrated deep sea suction anchor device and an integrated magnetic sensing auxiliary penetration method. The resistance reducing and reinforcing integrated deep sea suction anchor device comprises an anchor cylinder, a combined control part is arranged at the top of the anchor cylinder, and a sensing unit is arranged on the periphery of the anchor cylinder; the synergistic effect of the combined control part and the cutting blades on the inner wall of the anchor cylinder is adopted; the combined control part is used for carrying out pre-softening and side wall lubrication on a soil body in a preset path through high-pressure water flow before penetration and in the penetration process, so that the initial penetration resistance and the barrel wall friction resistance are greatly reduced; meanwhile, the cutting blade continuously performs longitudinal sectioning and shunting on an internal soil plug in the sinking process of the anchor body, and actively destroys the formation of a stress arch structure in the soil body, so that the main obstacle causing mounting suspension is fundamentally eliminated; by means of the design, the device can be suitable for wider seabed geological conditions, and one-time, high-depth and controllable injection in various complex stratums is achieved.