629 results about "Solum" patented technology

The invention discloses a situ determination method and device of carbon dioxide flux in soil. This invention is based on the principle of convection and diffusion between the soil and air, using scale-marked drill pipe vertically drill from the soil surface downward, obtain carbon dioxide samples from different soil depth through sampling rod, directly to the apparatus, according to the physical property that infrared has special absorption to carbon dioxide gas, regularly measure the concentration of carbon dioxide that soil of different depth released or absorbed. Substitute the concentration value of carbon dioxide at different soil depth into formula, and then flux of carbon dioxide of unit area in unit time at certain depth under standard atmospheric pressure can be obtained. The invention can be used for observations of carbon dioxide flux, detection of carbon dioxide storage under different depths in natural state, calculation of variation of carbon dioxide emission induced by land-use changes and evaluation of restore rate of plant cover and land capability.

The invention relates to a multi-layer soil water fertilizer migration and transformation parameters testing device and a method, which comprises steps: (a) cylindrical organic glass inner and outer columns and layered soil columns are made, plum blossom-shaped holes are distributed on a specify height in organic glass, and soil columns are packed by cylindrical organic glass inner columns, and are divided into plough layers, plowing layers and bottom soil layers; (b) soil water potential sensors, negative pressure water-taking samplers and soil water content measurement instruments are respectively embedded in various soil layers; (c) soil water generates lateral seepage water which is discharged into ring-shaped regions between the cylindrical organic glass inner and outer columns through the plum blossom-shaped holes at the same time during the infiltration process, and is extracted into an external device to assay and analyze. The multi-layer soil water fertilizer migration and transformation parameters testing device and the method are used to explore layered soil water fertilizer infiltration and lateral seepage and transformation process thereof, determines drainage contribution rate of vertical seepage and lateral seepage of the layered soil in various conditions, can be provided with different underground water levels, and develops translocation and transformation of soil water fertilizer on various layers and mutual replenishment relationship of soil water and underground water.

The invention discloses an active and passive soil pressure damage simulation analyzer for a soil body behind a retaining structure. The analyzer adopts a square box body in appearance, a threaded rod penetrates through a fixed casing pipe for mounting a hand wheel, and a top bracing is rotated to transfer the axial displacement; an angle control ring is in bolted connection with a movable baffle, and is easy to replace; as the angles of holes of inner and outer rings are different, inserted pins are used for fixing, and the tilt angle of the baffle can be adjusted as per the pace of 6 degrees; to-be-tested soil body ad colored sand are spread layer by layer in the box body during the testing; the hand wheel is rotated clockwise or anticlockwise to enable filling behind the baffle to deform, and after the filling reaches a limit state, the soil layer slips or swells to generate active or passive damage; the assumption of the Coulomb soil pressure theory and the Rankine soil pressure theory can be met through changing the tilt angle of the baffle and the friction degree; the displacement of the baffle can be obtained through conversion of rotating turns of the hand wheel, and the earth pressure and distribution of the earth pressure can be collected through a stress sensor embedded on the baffle. Therefore, the device can be used for validating the two soil pressure theories and analyzing the theoretical reasonability and engineering suitability of the theories.

The invention discloses a soil sampling device of saline-alkali soil pollution remediation equipment and a drilling method of the soil sampling device, and relates to the technical field of environment-friendly machinery. The invention aims to solve the problems that a soil sample needs to be knocked by a tool when being separated from a sampling barrel, the soil sample is not easy to separate, and the soil sample is easy to crush and mix. The device specifically comprises a rack, a pulling plug is fixedly installed at the end of the rack, a power supply mechanism is fixedly installed on one side of the interior of the rack, a collecting shell is fixedly installed at the other end of the interior of the rack, and a negative pressure fan electrically connected with the power supply mechanism is fixedly installed at the top end of the collecting shell. According to the soil sampling device, soil is sucked into the collecting shell through an oval suction hole, a drilling pipe and a suction pipe, multiple soil samples can be collected by moving an auxiliary soil sampling mechanism, after the drilling pipe is screwed into a soil layer to reach the set depth, the driving motor rotates reversely, a soil sampling structure in the main soil sampling mechanism pops up, and the sampling operation of soil samples of different depths is completed; and multiple samples of different soil layers can be obtained through the two soil sampling modes.

The invention relates to a method for processing the water leakage of a soil layer which is arranged on the bottom portion of a deep foundation pit. The method for processing the water leakage of a soil layer which is arranged on the bottom portion of a deep foundation pit is characterized in that the method comprises the following steps: V1ing, firstly, a position and the side in the bottom portion of the deep foundation pit, where leakages water are dug with a blind drainage ditch, a blind shaft is dug on the end portion of the blind drainage ditch, the blind shaft and the blind drainage ditch are communicated, and the blind drainage ditch and the blind shaft are arranged under the bottom portion of the deep foundation pit. V2ing, filter materials are backfilled in the blind drainage ditch, a drainage pipe is arranged in the blind shaft, an opening is opened on the side surface of the lower end portion of the drainage pipe, a water pump is arranged in the drainage pipe, at the same time or after the drainage pipe is arranged, the filter materials are backfilled in the blind shaft. V3ing, concrete slabs are cast on the upper portions of the blind drainage ditch and the blind shaft and the lower portion of a basement foundation slab or a foundation base. V4ing, the water pump is opened to discharge. The construction method of the invention is simple, the effect is excellent, the water leakage of the soil layer which is arranged on the bottom portion of a deep foundation pit is capable of being effectively treated.

The invention relates to environmental protection of oil and gas fields and provides a method for remedying oil pollution by unitedly using air shatter crack and microorganism and a device thereof. The method comprises the following steps: firstly, carrying out the air shatter crack on soil layer polluted by oils, removing pollutants in a vaporphase by using a vacuum pump, and opening a high-pressure sprayer to evenly disperse and inject culture mediums or microorganism into the soil; and the outlet of a central extraction well is connected with the vacuum pump, continuous airflows are extracted in the extraction well by the vacuum pump, and the balance of oxygen is supplied by peripheral wells for the purpose of keeping the continuous supply of the oxygen in soil pore space to remove the pollutants in the vaporphase. The invention also provides the device which is composed of an air compression engine, the vacuum pump, a valve, the high-pressure sprayer, a feed tank and a mixed tank. Compared with the homogeneous processing techniques, the invention saves cost by about 40-50% and economizes running cost by 20-35%; in addition, maintenance and management cost of the invention is 40-75% of that of the homogeneous processing techniques.

The invention discloses a multifunctional soil detection device for environmental detection. The soil detection device comprises a mounting vehicle plate, pushing handlebars are fixedly connected to the two sides of one end of the mounting vehicle plate correspondingly, and a storage battery is fixedly connected to one end of the top of the mounting vehicle plate. Mounting vertical rods are symmetrically and fixedly connected to the middle of the other end of the top of the mounting vehicle plate, a mounting vertical groove is formed in the middle of one side of the mounting vertical rod, andmounting bolts are movably connected to the inner sides of the mounting vertical grooves. According to the present invention, an extrusion block is extruded out of a drill bit through an extrusion airpipe, further the soil at the bottom layer of a sampling inner pipe is cut off, meanwhile, the compaction degree of soil at the bottom of the sampling inner pipe can be further improved under the extrusion action of the extrusion block, and the soil in the sampling inner pipe is intercepted when the sampling mechanism is lifted from the soil layer, so that the phenomenon that a soil sample in thesampling inner pipe slides down when the sampling mechanism is lifted is avoided, the phenomenon that the soil sample is mixed is effectively prevented, and the detection accuracy of the soil sampleis further improved.

This invention describes a simple and effective method, through introducing fluoride ion releasing agent / salt(s), such as sodium fluoride, for preventing, reducing or eliminating the undesirable construction heave / expansion / distresses / damage, characterized by loss of dimensional stability and integrity of expansive soil layers or concrete structural elements, primarily caused by the formation of ettringite or similar minerals. We demonstrated the technology that can be easily applied to new construction sites and to the sites where repair / retrofit of the existing or potential distresses in soil subgrade, base, subbase, or construction materials is needed. Experiments have demonstrated the effectiveness and efficiency of the technology with applications to stabilization of soils with all range of aluminum and sulfate contents including more than 3000 ppm of sulfate, and to treating cementitious construction materials. This invention can also extend the application of lime to stabilization of sulfate-rich soils and remedy of foundation movement or tilting of buildings caused by the formation of ettringite.

The invention discloses a method for in-situ repairing of contaminated soil in an arsenic slag field. The method comprises the following steps that naturally-aired arsenic slag field arsenic contaminated soil is crushed and screened; the above soil is mixed with deionized water, the water content of the soil is 25%-45%, and stirring is conducted for achieving balancing; and joint repairing is conducted on the above balanced soil through the electric-PRB technology through an electrolyte and a strengthening reagent under the condition of pH being 5-7, wherein the medium of PRB is Fe0. According to the method, the electric repairing technology is utilized for being in joint usage with PRB, the advantages of the electric technology and the PRB technology can be combined, the removing efficiency of arsenic in the soil is improved, and the repairing time is short; a soil layer is not disturbed, and the method is suitable for soil with low permeability; and meanwhile, the arsenic can be recycled, secondary pollution can be effectively reduced, the subsequent treatment workload is reduced, and the economic benefits are increased.

The invention relates to a salinized soil field thaw collapsing index detection method. According to an immersion load test for measuring thaw collapsing coefficients in Salinized Soil Area Building Code (SY / T0317-2012), only the thaw collapsing coefficients of a salinized soil layer under one standard atmospheric pressure can be obtained through a set of tests and needed workloads are large. According to the salinized soil field thaw collapsing index detection method, two load tests can be carried out at the same time on the same test field. According to one load test, under the natural state condition, loads are added grade by grade until the pressure P of the last grade is achieved, and a foundation settles and is stabilized when the load of each grade is added and then the load of the next grade is added. According to the other load test, the foundation is fully immersed and saturated, loads are added grade by grade until the foundation settles and is stabilized. The settlement difference of the foundation in the immersion state and the foundation in the natural state under the same pressure grade is the thaw collapsing amount of the pressure grade. The thaw collapsing coefficient delta m is calculated through the formula in the specifications. According to the salinized soil field thaw collapsing index detection method, the thaw collapsing amounts and the thaw collapsing coefficients under multiple grades of pressure can be obtained through one-time testing, the determined salinized soil thaw collapsing amount and the thaw collapsing coefficient basically conform to a regular single line method and the efficiency of the tests can be greatly improved.

The invention relates to a submarine landslide evolution process simulating system and experimental method based on transparent soil and a rotating water tank, and belongs to the technical fields of marine geological disasters and geotechnical engineering experiments. The simulating system comprises a rotating water tank system, a transparent soil simulating system and a control and data collection system. The rotating water tank system sets different speeds for a sample by means of a control motor, and a closed circular ring structure of a U-shaped section rotary drum groove satisfies that the sliding distance is not limited; the transparent soil simulating system prepares a transparent sample, with a tracer coloring agent, and fluid environment whose physical mechanical property is the same with that of a real submarine soil layer, so that the internal, external and water-soil interface is visualized in a 3D way in the whole sample evolution process; and the control and data collection system realizes quantitative monitoring and data extraction of the evolution process by means of 3D laser slicing and digital image collection. The provided system is controllable in the scale, visualized in the evolution process, capable of measuring image data, and can solve the problems that a long-distance evolution experiment is hard to carry out, data acquisition is difficult, and a monitoring picture is not clear.

The invention relates to a soil layer interfacial shear testing machine and a soil layer interfacial shear testing box. The soil layer interfacial shear testing box comprises an upper box body and a lower box body, the lower box body is provided with an inner cavity communicating with the upper box body for filling a testing soil layer, or the lower box body is provided with a resistance plate used for making friction contact with the testing soil layer in the upper box body, the upper end of the upper box body is open, an upper pressing plate used for pressing the testing soil layer in the upper box body is arranged at the power output end of a vertical loading mechanism, a lower guiding structure with the transverse guiding direction is arranged between the lower box body and a device frame, an upper guiding structure with the transverse guiding direction is arranged between the upper box body and the lower box body, and the power output end of a transverse loading mechanism is in transmission connection with the lower box body. The soil layer interfacial shear testing machine capable of testing soil layer interfacial shearing force, and the soil layer interfacial shear testing box used in the soil layer interfacial shear testing machine are provided by the invention.

The invention relates to an assembled-type vertical saturated soil column pollutant migration testing device. The device comprises a test soil column and a water supplying device, wherein the test soil column is formed by assembling three types of basic components, namely, an upper water feeding component, middle sample loading components and a lower water discharging component, which are connected with one another by virtue of flanges which are arranged on the basic components; the middle sample loading components are staggered according to a certain angle and then are connected with one another; the upper water feeding component comprises a shell, an inner core and a porous stone; a water discharging outlet is formed in the bottom of the shell so as to reduce errors caused by replacement of a solution; the inner core comprises an upper turbulent flow layer and a lower helix mixing layer and is used for promoting solutions at the upper part to be evenly mixed; the porous stone is put on the top of a soil layer after sample loading is finished; each middle sample loading component can be split into two arc-shaped tube materials, water blocking rings are arranged in each arc-shaped tube material at intervals so as to prevent water flow from being cut off; and a porous stone is contained in the lower water discharging component. As the testing device is applied, a testing condition is optimized so as to reduce testing errors, and the testing device can adapt to simulation tests of multiple lengths by assembling the components of different numbers and specifications, so that the model utilization rate is improved and the cost is reduced. Thus, the mass production of the device can be realized.

Disclosed is a horizontal drainage consolidation method through blow filling of soft soil. The horizontal drainage consolidation method includes that (1), in a blow filling area, zoning is performed according to width of 50-125m to form a plurality of zoning areas; (2), on two sides of the zoning areas, a plurality of longitudinally-arranged vertical pipes are arranged on a vertical plane, and the bottom ends of the vertical pipes on the two sides are communicated with longitudinal horizontal pipes respectively; (3), a plurality of flexible transverse drainage plates are arranged horizontally, and two ends of the flexible transverse drainage plates are communicated with longitudinal horizontal pipes on two sides respectively; (4), performing blow filling of the soft soil in the zoning areas to form a first layer; (5), longitudinal horizontal pipes are arranged on the first layer, after being subjected to blow filling of the soft soil, in each zoning area along the sideline of the zoning area, middle areas of the vertical pipes on the two sides are communicated with longitudinal horizontal pipes respectively, a plurality of flexible transverse drainage plates are horizontally arranged, two ends of the transverse drainage plates are communicated with the longitudinal horizontal pipes on the two sides respectively to form a second layer, and the transverse drainage plates among layers are parallel to one another; step (4) and step (5) are repeated and so on to form a plurality of layers; the layers are communicated with one another, and vacuumizing equipment is communicated with the vertical pipes for vacuumizing.

The invention relates to a rock-soil sampling mechanical device for civil engineering and belongs to the technical field of rock-soil analysis of civil engineering. The rock-soil sampling mechanical device comprises a top frame, a vertically arranged hydraulic telescopic rod whose upper end is fixedly connected with a bottom end of the top frame, a sampling pipe which is vertically arranged underthe top frame and is provided with sampling windows which are uniformly distributed at intervals from the top to bottom, a first rotating shaft which is vertically arranged and is rotationally arranged in the sampling pipe, a drill bit which is fixedly connected with a lower end of the first rotating shaft, and a first driving device which is fixedly connected to the top frame and is in transmission connection with an upper end of the first rotating shaft, wherein two ends of the first rotating shaft rotationally extend out of the sampling pipe. The rock-soil sampling mechanical device has theadvantages that hard rock in the soil can be drilled, the soil collection in deep soil can be facilitated, meanwhile, soil samples of different soil layers can be collected separately, and the soil sample analysis is facilitated.

The invention provides a novel device for testing dissolved settlement coefficient of indoor coarse-grained salty soil. The device comprises a container and a loading part, wherein the container is used for containing salty soil and comprises a water outlet; the loading part is arranged on the container and comprises a loading rod and a pressure-bearing rod; the loading rod is positioned on the upper side and horizontally arranged; the pressure-bearing rod is positioned below the loading rod; a base plate of which the lower surface is contacted with the salty soil and which is capable of downwards compressing the salty soil is arranged at the bottom of the pressure-bearing rod; a movable balance block is arranged at one end of the loading rod, and a sliding type load weight is suspended at the other end of the loading rod so as to realize continuous variable loading; and settlement marks are uniformly distributed at the specified depth of the tested soil sample surrounding the loading plate, and a dial indicator is arranged on the settlement marks for testing the settlement of each soil layer.

The invention discloses a seabed soft-soil layer preparation device and method for a large-dimension physical model test, and belongs to the technical field of geotechnical engineering tests. The seabed soft-soil layer preparation device comprises a consolidation and sample preparation system, a monitoring and control system, and a counter-force loading system, wherein the consolidation and samplepreparation system is pressurized from the upper part under a certain water-head condition, and consolidates a soil sample under a double-sided water draining condition, and density of the soil sample is tested; the monitoring and control system can monitor state changes of the soil sample in real time through sensors arranged in a soil sample consolidation region and an upper loading region, sothat various physical and mechanical parameters, such as moisture content, soil pressure, pore water pressure and a pore space ratio, of the soil sample are obtained; and the counter-force loading system can apply stable and uniform consolidation pressure to the soil sample consolidation region, and can reduce and even eliminate influences of unsymmetrical pressure. Three systems cooperatively work, so that real-time feedback is realized, and sample preparation ends while needed sample preparation standards are reached. The device is strong in applicability, is easy in connection, is simple and convenient in operation, is good in sample preparation integrity, is uniform and consistent, and is also suitable for seabed soft soil and ultra-soft soil sample preparation.

The invention discloses a grouting repairing method of a water stopping curtain, which comprises the following steps of: (1) measuring and labeling grouting holes, wherein the grouting holes are divided into two sequences, namely a sequence I and a sequence II, the holes of the sequence I and the holes of the sequence II are arranged transversely at equal intervals, and the holes of the sequence I and the holes of the sequence II are arranged longitudinally in rows at equal intervals; (2) grouting the holes of the sequence I: firstly drilling the holes of the sequence I, inserting shock tubes to the holes of the sequence I, then closing the holes of the sequence I and grouting by sections, and finally cleaning the tubes for later use; and (3) grouting the holes of the sequence II: firstly drilling the holes of the sequence II, inserting shock tubes to the holes of the sequence II, then closing the holes of the sequence II and grouting, and finally cleaning the tubes for later use. By the method, grouting is conducted by holes of two sequences according to the principle of grouting at intervals and densifying by sequences; the holes of the sequence I are grouted to fill the holes of the soil layer; the holes of the sequence II are grouted to crack the stratum and form a seepage-proofing curtain in the stratum; and the finally repaired curtain can effectively reduce the displacement of a foundation pit, the underground erosion of the stratum around the foundation pit, and settlement of the foundation and buildings.

The invention provides a construction method of a stirring pile as well as a drill rod and a solidifying agent conveying device thereof. Two soil solidifying agents which can mutually react or can be mutually influenced can be respectively sprayed in the working procedures of sinking and lifting in the construction of the same stirring pile; and moreover, solidified soil can still be effectively stirred, so that the strength of the stirring pile is quickly enhanced in a short period, and the requirement of special engineering, such as salvage and disaster relief, on time is met. When the same soil solidifying agent is used, the soil solidifying agent can still be sprayed in the processes of sinking and lifting of a stirring pile machine, the solidified soil is effectively stirred, the construction efficiency of a stirring pile with large diameter can be enhanced, and the construction time is saved by approximately a half. The requirements of different soil layers on the form of the soil solidifying agent in a soft-soil foundation with a crust layer and high water content can be met, and the quality of a pile body is enhanced.

The invention relates to a drilling test device and method used for a shield model test. The drilling test device comprises a workbench which is provided with a tunnel circular pipe. The front side of the tunnel circular pipe is provided with a cutterhead driven by a driving mechanism. The rear side of the cutterhead is provided with a closed chamber used for storing excavated muck. The lower portion of the closed chamber is provided with a muck suction mechanism, and the upper portion of the closed chamber is provided with a ventilation mechanism, wherein the muck suction mechanism and the ventilation mechanism are synchronously opened and closed. The tunnel circular pipe is sleeved with a rubber sleeve with the inner side face being adhered to the tunnel circular pipe. The rubber sleeve is provided with a grouting simulation mechanism. The front side of the workbench is further provided with a simulation box used for being filled with soil layer materials. Holes used for drilling of the cutterhead are separately reserved in the two sides of the simulation box. The drilling test device is compact in structure and can be conveniently used for simulating the excavation and grouting processes, and meanwhile, the method is simple and convenient.

The invention relates to an experimental area underground water level accurate control system and method. The experimental area underground water level accurate control system comprises a sandstone percolation layer in which a water supply and drainage pipe network is horizontally and vertically arranged in an embedded way. The water supply and drainage pipe network is at least connected with a vertically arranged prefilling drainage well through a communicating pipe. The bottom part of an underground water level logging well is provided with an underground water level indicator. The communicating pipe is provided with a communicating valve and a water supply and drainage pressure gauge. The bottom part of the prefilling drainage well is provided with a prefilling drainage level indicator. A water inlet pipe is provided with a water inlet valve and a water inlet flowmeter. A water outlet pipe is provided with a water outlet valve and a water outlet flowmeter. The water level in the prefilling drainage well is controlled based on the height of the underground water level of an original soil layer and other various parameters, and the water level of the original soil layer is influenced by water pressure of the prefilling drainage well so that the objective of accurately controlling the underground water level of the original soil layer can be achieved. The water level of the prefilling drainage well is quite easy to control, and pressure of the prefilling drainage well can also be rapidly transferred to the original soil layer so that rapid and efficient underground water level adjustment can be realized.

The invention discloses a synthesis method and application of the hydroxy aluminum expansive soil improver, belonging to technical field of geotechnical engineering. The synthesis method of the hydroxy aluminum expansive soil improver comprises the following steps: (1) preparing the 1mol / L AlCl3 solution in a glass beaker, adding into a thermostat magnetic heating stirrer, and heating; (2) after heating the AlCl3 solution to 80 DEG C dropwise adding 0.6mol / L NaOH solution into the AlCl3 solution slowly until the basicity B value is 1.5-2.5; (3) making the content of aluminum in the solution be 0.5mol / L to obtain the hydroxy aluminum expansive soil improver; and (4) constructing 5-60 days after the hydroxy aluminum expansive soil improver is synthesized. The hydroxy aluminum expansive soil improver synthesized by adopting the synthesis method is a weakly acidic solution, causes less influence to the groundwater and the vegetation and is used for safely processing the expansive soil in situ without disturbing the original soil layer.

The invention relates to a method to test friction resistance at inner and outer sidewalls of pipe pile through in-situ test. The method comprises embedding a strain sensor at inner or outer sidewalls of pipe pile to measure strain variation generating on pipe pile body under the action of load; carrying out static load test with the soil plug remaining in the pipe pile to obtain the strain variation εp1j,i of the pipe pile body at the ith soil layer; taking out the soil plug remaining in the pipe pile and carrying out static load test to obtain the strain variation εp2j,i of the pipe pile body at the ith soil layer; and obtaining the friction respectively at the outer and inner sidewalls of the pipe pile at the ith soil layer according to the measured strain variation, εp1j,i and εp2j,i.

The invention discloses a deep soft foundation consolidation settlement layering summation algorithm based on soft soil parameter spatial anisotropy. The algorithm comprises the steps: carrying out the layering and partitioning of a soft soil foundation according to the stratum condition of a soft soil region; calculating the vertical self-weight stress of the foundation at the layering position;calculating foundation additional stress, and obtaining foundation additional stress at each layered interface; if the thickness of the subarea is relatively large, dividing the area into layers according to intervals; averaging and calculating the average value of the self-weight stress and the additional stress of each layered foundation according to the stress of the upper bottom surface and the lower bottom surface of each layer, determining the depth of a foundation compression layer, determining a subarea where a soil layer is located, calculating the main consolidation settlement amountof the soft soil foundation of each layer, calculating the total main consolidation settlement amount, and calculating the total final settlement amount; calculating the foundation consolidation degree at any moment; and predicting the foundation settlement amount. According to the deep soft foundation consolidation settlement layering summation algorithm, the property change of the deep soft soil at different depths is considered, the deep soft soil foundation settlement prediction precision is improved, and post-construction settlement prediction and control of engineering construction in adeep soft soil area are realized.

The invention discloses a treatment device for heavy metal pollution in soil. The device comprises a platform, and a front roller and a rear roller are rotatably mounted on support legs at the front end and the rear end of the platform respectively; a shovel plate is rotationally installed on the bottom face of the front end of the platform, a liquid storage tank is installed on the upper end faceof the platform, a spraying plate is installed at the bottom of the shovel plate, and a liquid conveying pipe communicates between the spraying plate and the liquid storage tank; and a sleeve is fixed to the bottom face of the rear end of the platform, a telescopic column is movably sleeved with the sleeve, an installation plate is fixed to the bottom of the telescopic column, and a plurality ofrakes are arranged on the installation plate. The surface layer of contaminated soil is shoveled up through the shovel plate, meanwhile, remediation liquid is sprayed to the inner layer of the soil through a spray head, and then the rakes reciprocate up and down, so that the soil layer is continuously punctured, the remediation liquid permeates into the deep part of the soil layer from puncture holes, and the treatment effect is improved; and soil shoveling, pesticide spraying, soil covering and puncturing processes are continuously carried out, so that uninterrupted treatment of soil can be realized, and the treatment efficiency is high.

The invention provides an in-situ remediation method for heavy metal contaminated soil and application thereof, and relates to the technical field of contaminated soil prevention and treatment. The in-situ remediation method comprises the steps that an anti-seepage layer is laid on the contaminated soil after solidification treatment, then a planting soil layer is laid on the anti-seepage layer, and vegetations are planted on the planting soil layer to achieve the purpose of remediation of the soil contaminated with heavy metals. The in-situ remediation method has the advantages of safety, cleanness, high environmental benefits and obvious ecological benefits, and the advantages of low cost and convenient construction are achieved by applying the in-situ remediation method to industrial pollution site repair.

The invention discloses an indoor device and method for simulating construction disturbance soil of a movable small-sized shield machine, belongs to the technical field of tunnel shield construction simulation, and aims to solve the problem that workers cannot know the disturbance condition of soil in time in the current shield construction process. The device comprises a shield machine model, a shield machine power system, a test soil box and an upper loading system, wherein a horizontal servo jack and a frequency conversion motor provide power for the shield machine model, and a vertical servo jack and an air pressure loading device provide soil layer stress environment; and a wet method is adopted to fill the test soil layer by layer in the test soil box, a sensor is further buried, then stress, displacement and excess pore pressure in the shield process are obtained, and a contour map along with shield tunneling is drawn, so that a disturbance range change of the soil, a shear expansion force influence range and a shear expansion force distribution rule are obtained. According to the device and the method, the disturbance of the shield construction to stratum can be researchedaccording to one or more factors of different overburden thicknesses, different water levels, different propelling forces, different cutter head rotating speeds, different cutter head types and the like.

Disclosed is a drain mat for drainage of soft ground. It comprises a coir sheet containing natural latex which fills in the gap between interconnected coconut fibers, and filler which is inside the coir sheet and provides passages for pore water that soaks through the coir sheet. Therefore, deformation of the drain mat caused by the pressure of the solum is prevented by increasing strength of the drain mat. Furthermore, since fine clay or soil included in pore water do not flow inside the filler, drainage of pore water is excellent.

The invention discloses an energy pile bearing performance test device. The device comprises a counter-force system, a loading system, an energy control system, a pile-soil system and a measurement and collection system. According to the collection system, the energy changing process of an energy pile and soil around the pile as well as the interaction and deformation characteristics of the pile and the soil can be visually observed, and tests on the bearing performance and the deformation characteristics of the pile, the physical and mechanical state changes and the deformation characteristics of the soil around the pile and the like in the energy changing process of the energy pile and soil body can be performed. Indoor tests for different soil bodies and different drainage working conditions can be carried out, and geotechnical centrifuge tests can also be carried out. Conventional indoor tests and geotechnical centrifuge tests such as pile-soil interaction between energy piles or between conventional pile and energy soil (frozen soil or geothermal soil or soil layers with different temperatures in deep foundations) under the action of combined load, single load, cyclic load andcombined cyclic load can be implemented.