132 results about "Muck" patented technology

The invention is generally directed to a system and process for fluorometrically quantifying potentially mineralizable nitrogen for agricultural crop production. The soil analysis process measures potentially mineralizable nitrogen and calibrates the application of soil-based nitrogen for site or field specific management of nitrogen fertilizers for crops grown on a wide variety of soil textures including sandy loam, silt loam and clay soils. The spectrofluorometric system and process may be utilized for routine soil testing with a lower sample to sample variability, and the automation of the spectrofluorometric system and process allows for simultaneous determination of potentially mineralizable soil organic nitrogen, ammonium and nitrate.

The invention provides a multi-working-condition earth pressure balance shield muck workability test simulation test system. The multi-working-condition earth pressure balance shield muck workabilitytest simulation test system comprises a water supply system, a pressure air source, a test cylinder, and a shear rod, an axial loading device, a radial extrusion ring bag and a test bin pressure sensor which are arranged in the test cylinder, the test cylinder can simulate the working state of a soil bin of the earth pressure balance shield tunneling machine, the axial loading device is used for simulating different jacking forces of the shield tunneling machine, the radial extrusion ring bag is used for simulating the change of the soil discharge speed of a spiral conveyor, the water supply system is used for simulating the water pressure of different underground water environments, and a modifier adding system is used for a muck sample improvement test. According to the multi-working-condition earth pressure balance shield muck workability test simulation test system, the workability of the soil sample can be comprehensively tested under the condition that the water pressure and thesoil pressure change synchronously, and the research on the coupling influence of the water pressure and the soil pressure on the workability of the soil sample is facilitated; and soil sample workability parameters measured by the test system are more scientific and objective, and the test system better conforms to actual working conditions of shield engineering of special water-rich stratums such as underneath pass rivers and seas.

The invention discloses a method for shield sandy muck improving capacity enhancement and parameter determining. Sandy soil consistent with a stratum where a shield penetrates through serves as a mucktest material, a foaming agent and water serve as a basic improving material, according to the muck collapsing degree value and the apparent state, the proper improving area is determined, accordingto whether the initial water containing amount of the sandy soil of the stratum where the shield is located is in the range of the water containing amount of the proper improving area or not, whetherwater needs to be injected or not is clear, whether bentonite or high-molecular polymer needs to be injected to enhance the capacity that the muck can be improved by the foaming agent and water, according to the proper improving area, the foam injection ratio is determined, the muck in the proper improving state is subjected to a penetration test, and whether the impervious performance of the muckmeets the construction need or not under the high water pressure condition at the shield site is detected. The clear muck improving thinking is provided, the direction is clear, the technology is reliable, and the method can be directly used for shield tunnel site construction.

The invention belongs to the related technical field of treatment of sludge slurry with ultrahigh water content. The full-automatic hydraulic permeation consolidation device comprises a water pressurecontrol assembly, a permeation consolidation assembly, a measuring assembly and a data acquisition assembly, the water pressure control assembly is connected with the permeation consolidation assembly, and the measuring assembly is arranged on the permeation consolidation assembly and connected with the data acquisition assembly; the consolidation device is used for realizing drainage consolidation of a soil body through pushing and friction dragging effects of seepage force of high-pressure water on a soil sample; the water pressure control assembly is used for controlling the seepage force,and the data acquisition assembly is used for acquiring the pore pressure at each depth of a soil sample in the seepage consolidation assembly, the displacement at each time and the drainage rate inreal time so as to obtain the seepage coefficients of different stages. According to the invention, the filter pressing benefit is improved, real-time and automatic acquisition of test data is realized, large errors caused by manual reading are avoided, and the test data is accurate and reliable.

The invention discloses a muck improving control method and system based on shield tunneling parameter change. The muck improving control method comprises the following steps: a soil bin pressure value and a cutterhead torque value for shield tunneling are obtained in real time, whether the soil bin pressure value and the cutterhead torque value for shield tunneling meet a first condition or not is judged, if the soil bin pressure value and the cutterhead torque value for shield tunneling meet the first condition, it is judged that currently-used tunneling parameters and improving parameters are suitable for a current tunneling formation condition, if the soil bin pressure value and the cutterhead torque value for shield tunneling does not meet the first condition, it is judged that the currently-used tunneling parameters and improving parameters are not suitable for the current tunneling formation condition, and the improving parameters and the tunneling parameters are adjusted till the improving parameters and the tunneling parameters are suitable for the current tunneling formation condition. By adjusting the improving parameters based on the shield tunneling parameter change, the improving parameters suitable for a corresponding formation are obtained, unimproved muck does not need to be obtained again for testing in the period, and the problems that in the tunneling process, muck taking is difficult, the difference between an actual formation condition and obtained muck is large, and consequently determined improving parameters are not reasonable are avoided.

The invention provides a full-face tunnelling machine cutter arrangement design method based on actual stratum conditions, and relates to the technical field of full-face tunnelling machine cutter head design. The method comprises the following steps of calculating the adjacent spoke overlapping diameter of a cutter head according to the cutter mounting width; determining the optimal cutter head scroll number according to the muck particle trafficability; determining the number of cutters according to the stratum parameters; calculating the tool arrangement Archimedes spiral parameters in a classified mode; and checking and adjusting the cutter layout contradiction. According to the method, the efficient rock breaking and continuous soil discharging operations of a hob can be guaranteed, and the overall torque balance degree of the cutter head is effectively improved. The method is a cutter head design method considering the actual stratum situations, the calculation principle is clear, and the calculation process is simple and clear.

The invention discloses a method for applying treated river and lake silt to a land-water ecotone plant planting medium. By adoption of the method, final planting soil is obtained by S1 sediment dredging, S2 mud-water separation, S3 silt solidifying, S4 harmless treatment and S5 planting soil formation sequentially. According to the method, firstly, a rapid mud-water separation technique is designed for low-concentration dredged mud and integrated with a subsequent silt solidifying treatment technique to form an integrated sediment dredging treatment and utilization technique to turn dredged sediment into soil; then, by a sediment microbial technique, the polluted river and lake silt is subjected to harmless treatment to meet planting soil quality control requirements, and the characteristic of rich nutrition of the river and lake sediment can be given into full play, and high-quality organic planting soil is formed.

The invention provides a test system and method for simulating muck improvement and migration, and relates to the field of muck improvement simulation. The test system comprises a soil bin and a conveying assembly. A rotating cutter head coaxially arranged with the soil bin is installed in the soil bin, and a driving mechanism penetrates through the wall of the soil bin to be connected with the cutter head and can drive the cutter head to reciprocate in the axial direction of the soil bin. The conveying assembly comprises a spiral conveying mechanism, the spiral conveying mechanism penetrates through the side wall of the soil bin to be communicated with an inner cavity of the soil bin, and a plurality of pressure sensors are arranged outside the spiral conveying mechanism and can measure the internal pressure field of the spiral conveying mechanism to feed back and adjust the deslagging speed of the spiral conveying mechanism. Bentonite and foam-polymer mixed liquid injection ports are arranged in the upper portion of the soil bin test device and the upper portion of a spiral conveyor, muck improvement can be conducted, and a corresponding weighing sensor is arranged on the outer side of the pipe wall of the spiral conveyor to measure a stress curve in the machine body so as to explore the muck migration rule. Therefore, technical support is provided for expanding the application range of the earth pressure balance shield in high-permeability and low-fluidity gravel stratums.

The invention relates to a soft foundation vacuum preloading processing method, in particular to an ultrasonic vacuum preloading method. According to technical scheme, the method includes the steps of laying an ultrasonic operation point in a soft foundation vacuum preloading processing region, installing an ultrasonic power supply and an ultrasonic transducer, and turning on the ultrasonic power supply and using the ultrasonic transducer to carrying out ultrasonic treatment on a soft soil layer in the soft foundation processing region in the vacuum preloading vacuumization and drainage consolidation process. Through the technical scheme, the phenomena that capillary drainage channels and plastic drainage plate filter cloth in the soft soil layer in the vacuum preloading construction process are blocked can be effectively eliminated, and new capillary drainage channels are established in the soft soil layer, so that the flow rate of the air and water are increased. Through the method, the vacuum preloading construction effect can be obviously improved, the construction cycle can be shortened, and construction cost is saved. The ultrasonic vacuum preloading method is especially applicable to for soft foundation vacuum preloading processing construction on mucky soil.

The present invention relates to a method for recycling of synthetic material containing waste. In the process initially in a first step the synthetic material containing waste is crushed to a particle diameter ≦100 mm and then admixed as aggregate in a soil material, in particular in a silt containing soil for the earthworks. The portion of the synthetic material containing waste admixed in the second step is preferably 15 percent by volume to 70 percent by volume. The resulting soil material is in many aspects excellently suited for the earthworks and in particular, for the recultivation or the protection of problematic landfill areas.

The invention discloses a muck resource utilization system. The muck resource utilization system comprises a parameter analysis device used for analyzing a muck sample of a target site and obtaining physical parameters of the muck sample; a muck treatment device used for treating muck of the target site so as to complete resource utilization of the muck; and a central control device used for determining a model selection scheme and a site arrangement scheme of the muck treatment device according to the physical parameters of the muck sample, the muck daily output of the target site and site information of the target site, so that a user is instructed to install the muck treatment device in the target site according to the model selection scheme and the site arrangement scheme. By means ofthe scheme, muck resourceful treatment can be conducted in the shield construction process, the muck resource utilization system can adapt to different muck types and site sizes, and efficient muck resourceful treatment is achieved.

The invention relates to an in-hole air bag expansion pressurization and vacuum-electroosmosis composite drainage precipitation system and method. The system comprises a vacuumizing mechanism, a direct-current power supply mechanism, an air compression mechanism, a plurality of vacuum drainage wells and a plurality of transverse pressurizing holes distributed around each vacuum drainage well. Theprecipitation method comprises the following steps: (1) vacuum tube well drainage, wherein most of free water is drained under the action of vacuum suction force, and electroosmosis precipitation timeis saved; (2) vacuum electroosmosis precipitation, wherein part of pore water is drained under the action of vacuum suction force and electroosmosis force, and the water content of the soil body is further reduced; and (3) vacuum transverse pressurization precipitation, wherein a pressurization air bag is expanded squeeze the surrounding soil body, so that the pore ratio is rapidly reduced, the drainage precipitation speed is increased, and the soil body is reinforced. Compared with the prior art, by means of the effects of vacuum water absorption, air bag pressurization and electroosmosis, the risks of foundation pit excavation water gushing and pile foundation damage by soil movement in high-water-content and low-permeability soil layers are reduced, and rapid drainage precipitation ofmuddy soil is realized.

The invention discloses a shield muck recycling modifying process method. The shield muck recycling modifying process method comprises the following steps that (1) firstly, the moisture content of shield muck is tested, when the moisture content is less than or equal to 30%, the muck is dry muck, and a next operation is carried out on the dry muck, and when the moisture content is larger than 30%, dehydration treatment is conducted on the shield muck by using a dehydrating agent to form the dry muck, and then next operation, wherein when the recycled product is brick making raw material soil or roadbed material soil, quicklime is adopted as the dehydrating agent; and when the recycled product is garden planting soil, the dehydrating agent is a macromolecular water absorbent; (2) crushing and mixing pretreatment is conducted on the dry muck to homogenize particles of the dry muck or the dry muck added with the dehydrating agent to form fine-particle dry muck; and (3) modifying treatment is conducted on the pretreated fine-particle dry muck, specifically, different types of modifiers are added into the shield muck, crushing and uniform mixing are conducted on the shield muck simultaneously, and the recycled products such as brick making raw material soil, roadbed materials, garden planting soil and the like are obtained finally.

The invention discloses a method for damming by mucky soil filling bags. Key techniques, needed to be solved, of conventional mucky soil filling bag damming include that drainage seepage diameter of mucky soil in bags needs to be shortened, drainage rate needs to be increased, and build-in measures need to be increased among layers of filling soil bags. The technical scheme has the advantages that the bags are short in drainage seepage diameter, drainage plates can effectively drain excessive moisture in the bags, the bags are mutually built in due to staggered arrangement, different laying methods can meet different using functions of a dam, and a special filling machine can meet requirements of construction. By the method, a novel path for damming by the mucky soil filling bags is created; the method has wide application prospect in hydraulic reclamation, diking and dam engineering along rivers and seas. Compared with damming by sand filling bags, the method has the advantages that cost can be saved by more than 20%, and a novel path is created for ecological environment protection along the rivers and the seas.

The invention discloses a resource utilization method for mixed muck of silty-fine sand and silty clay of an earth pressure shield, and belongs to the technical field of geotechnical engineering and tunnel engineering. The silty-fine sand muck is used as a slurry additive material to replace a synchronous grouting river sand material, so that the cost is reduced, and meanwhile, pollutants such as heavy metals and inorganic salts in the slurry are solidified. The method comprises the following steps: firstly, determining the content of silty-fine sand and pollutant components in the muck, performing a uniform experiment in a laboratory to prepare silty-fine sand slurry, testing the properties of the slurry and a stone body, and evaluating the pollution treatment condition; revealing a slurry diffusion rule by using COMSOL Multiphysics finite element software, establishing a deformation prediction model after slurry solidification by using a neural network, and predicting ground surface settlement under the grouting effect of the silty-fine sand muck slurry; and establishing a multi-target planning model based on grout and stone body performance, pollution degree and ground surface settlement regression analysis, and determining the optimal ratio of the synchronous grouting material. The method has high application value.

The invention belongs to the field of soil remediation, and particularly discloses a multi-type land soil ecological remediation system and a working method thereof. The multi-type land soil ecological remediation system sequentially comprises a germination layer, an ecological soil layer, a filling layer and an original soil layer; wherein the original soil layer is turned over, the depth of theoriginal soil layer is 30-60 cm, and a raw soil curing agent is added in the turning over process, and 5-20 g of the raw soil curing agent is added into each liter of the original soil; the filling layer is formed by mixing plant residues, activated sludge and a microbial agent; the ecological soil layer is composed of ecological soil bags and a filler in the ecological soil bags, the ecological soil bags are made of degradable materials, the filler is composed of normal soil, plant ash and a water-retaining agent, and after filling is completed, multiple ecological soil bags are transverselysewn to form the ecological soil layer; the germination layer is formed by mixing plant seeds and normal soil; the ratio of the thickness of the germination layer to the thickness of the ecological soil layer to the thickness of the filling layer is 1: 2: 3; wherein the normal soil is selected from one of brown earth, brown soil and silt filling soil.

The invention discloses a method for detecting the geological condition of a tunnel face in the tunnel construction process. The method comprises the steps that based on a deep learning algorithm, a sample data set is used for training an image instance segmentation neural network to obtain an image instance segmentation model, and the sample data set comprises a plurality of rock slag sample images of different geological levels; each rock slag sample image is provided with a geological category label, and the contours of blocky rock slag and flaky rock slag are marked in the images. And the image instance segmentation model is called to analyze the to-be-identified rock slag image to obtain contour data segmented in the to-be-identified rock slag image corresponding to each rock slag in the solid slag and a probability value of the solid slag belonging to each geological level. And the content values of the blocky rock slag, the flaky rock slag and the rock powder in the solid muck are calculated according to the contour data, and the geological level of the tunneling tunnel face is determined in combination with the initial classification result, so that the geological analysis accuracy is not reduced while the defect of manual detection of the geological condition of TBM tunnel construction is overcome, and the intelligent degree of tunnel construction is improved.

The invention discloses a method and system for measuring the soil discharge amount of a shield tunneling machine and a medium. The method comprises the following steps of receiving real-time measurement data which at least comprise the belt speed of a belt conveyor for transmitting muck, the density of the muck, the section area, the temperature of the current muck and the excavation stroke; calculating a dumping deviation value according to the measurement data; and performing overbreak and underbreak monitoring alarm based on the soil discharge deviation value. The system comprises a belt tachymeter, a soil discharge amount scanner, a thermodetector, a soil discharge odometer, a control box used for controlling the belt tachymeter, the soil discharge amount scanner, the thermodetector and the soil discharge odometer to work, and an industrial personal computer. The method and the system at least have the following beneficial effect that the construction quality and efficiency can beimproved.

The invention provides a water-rich sand layer shield tunneling muck improvement construction test method. The method comprises the following steps that 1, a prefabricated modifier is added into a shield tunneling machine cutter head, a soil bin and a screw conveyor; 2, modifier parameters are determined, wherein 100m in front of a shield is selected as a test section, the same tunneling parameters are set, different modifier parameters are set, and trial tunneling is carried out on the test section; 3, tunnel parameters, the soil outlet amount and muck improvement parameters after tunneling are measured, the modifier parameters are adjusted, and the modifier parameters during formal tunneling are determined; 4, tunneling parameters are determined, wherein the modifier parameters are the same, and a shield tunneling machine carries out trial tunneling on the test section under different tunneling parameters; and 5, the tunnel parameters, the soil outlet amount and the muck improvementparameters after tunneling are measured, the tunneling parameters are adjusted, and formal tunneling parameters of the shield tunneling machine are determined. According to the method, the problems that in the prior art, due to the fact that the modifier parameters and the tunneling parameters are not reasonably set, the muck improvement effect is poor, the tunneling speed is reduced, and the abrasion of the shield tunneling machine is increased are solved.

The invention discloses a soil covering and grass planting construction method for a plateau alpine region. The soil covering and grass planting construction method comprises the following steps: S1, soil matrix investigation; S2, preparation of a soil matrix layer; S3, stone crushing treatment; S4, building of drainage ditches; S5, muck improvement; S6, application of an organic fertilizer; S7, sowing and post-processing; and S8, construction and mounting of enclosing fences. The method is suitable for the technical field of soil covering and grass planting. A mine soil aggregate structure is rebuilt, the soil matrix layer of an open pit coal mine in the plateau alpine region is rapidly improved, the ecological restoration benefit is improved, a mining area ecological system is constructed, the greening window period of the plateau alpine region can be shortened, the working procedure is simplified, the efficiency is improved, the problem that the grass planting window period is short is solved in the aspect of time, the soil covering and grass planting technical process and standard of the plateau alpine region are formulated, the working procedures are defined, and funds are saved.

The invention discloses a rapid nonsexual systematic mating of Herba Epimedii, which is performed as following: A, forming ridge in greenhouse or plastics greenhouse and paving muck soil with thickness of 10-15cm;B, choosing plants in good health and free from disease, removing overground leaves, taking underground stem part, cutting at the position capable of tillering bud into pieces of 2-3cm with at least on tillering oculus to obtain seedlings; C, soaking in clean water for 1-2h, seeding with spacing in the rows and between the rows of 5cmX5cm-10cmX10cm and sowing depth of 5-8cm, covering soil, irrigating rooting water, and overlaying film; D, ripping away the film after sprouting, watering, weeding, and transplanting after 2-4 months. The invention can maintain properties of the plants. Progenitive first filial generation of Herba Epimedii has stable properties and high survival rate. The invention has simple method and wide application, and is suitable for popularization in countryside.

The invention discloses a pile casing device for brine stratum mucky soil cast-in-place pile construction, which comprises a pile casing head, a fixed transverse plate and an outer pile casing body, the upper surface of the pile casing head is fixedly connected with the fixed transverse plate, the lower surface of the pile casing head is fixedly connected with the outer pile casing body, and reinforcing ribs are fixedly arranged on the outer surface of the outer pile casing body. The number of the reinforcing ribs is four, a plurality of first through holes are fixedly formed in the outer surfaces of one sides of the reinforcing ribs, a partition plate is fixedly arranged on one sides of the first through holes, a plurality of second through holes are formed in the partition plate, and the second through holes correspond to the first through holes in position. The outer pile casing body, the first inner pile casing body and the second inner pile casing body are arranged, so that the phenomena that a pile body deflects, a pile hole shrinks, collapses and even cannot be formed easily in the drilling process when a sludge layer is thick or located in a middle layer are effectively avoided, a mud wall protection process is avoided, and pollution to underground soil and water is completely eradicated.

The invention discloses an environmental-protection treatment method and system for shielding muck, and a storage medium. The environmental-protection treatment method for the shielding muck is applied to the environmental-protection treatment system for the shielding muck. Based on a primary multilayer screening device of the environmental-protection treatment system for the shielding muck, the to-be-treated shielding muck is primarily screened, and primary muck and first screening filtrate are obtained; based on a secondary multilayer screening device, the first screening filtrate is secondarily screened, and secondary muck and second screening filtrate are obtained; and the second screening filtrate is dewatered, and dried mud cakes and a clear solution are obtained. By conducting primary multilayer screening, secondary multilayer screening and dewatering treatment on the to-be-treated shielding muck, different types of muck such as primary muck representing coarse sand, secondary muck representing fine sand and dried mud cakes is obtained to be conveniently subjected to environmental-protection treatment through different modes, reduction transport and grading resource utilization of the shielding muck are achieved, and the treatment efficiency of the shielding muck is improved.

The invention relates to a model test device for simulating micro-disturbance construction of a shield near-grounding structure. A soil box module comprises a soil box body, a soil body is arranged in the soil box body, a pile foundation module and a tunnel module are buried in the soil body, a shield tunneling module cuts the soil body, and a propulsion control module is used for propelling the shield tunneling module; a grouting control module and a muck improvement module are used for injecting grouts and a muck improver, an underground water level control module is used for adjusting height of the underground water level in the soil box body, and a ground pressure loading module is used for adjusting pressure of the soil body; a data acquisition module comprises a data acquisition terminal and a sensor unit. Compared with the prior art, multiple modules are arranged, complex and diversified stratum conditions can be simulated, the construction disturbance influence of different shield parameters, propulsion parameters, grouting parameters and muck parameters on an underground structure can be considered, obtained data are closer to real construction data, and the accuracy is higher.

The invention relates to a muck resource utilization treatment method, in particular to an environment-friendly treatment method for silty clay in shield synchronous grouting, and belongs to the technical field of geotechnical engineering and tunnel engineering. The method comprises the steps: S1, collecting muck, wherein the muck is silty clay muck; S2, evaluating the pollution; S3, preparing slurry in a laboratory, taking silty clay muck as a basic material of the slurry, adding the silty clay muck into the synchronous grouting slurry to replace a bentonite component in synchronous grouting, and carrying out a uniform experiment; S4, simulating slurry diffusion; S5, establishing a stratum deformation prediction model after slurry solidification by using a neural network; S6, performing regression analysis on the performance and pollution degree of the slurry and the stone body obtained in the S3 and the ground surface settlement obtained in the S5, and determining the optimal proportion of the synchronous grouting slurry base material and the additive. By means of slurry solidification, pollution of heavy metal, inorganic salt and the like caused by the additive added for muck improvement and slurry improvement can be treated, and the treated slurry can meet the pollution control requirement.

The invention discloses a shallow soft soil foundation solidifying structure which includes a shallow solidifying body arranged under a beach shallow raw mud surface, a deep replacement body is arranged at the bottom of the shallow solidifying body, and the edge of the shallow solidifying body is provided with an anti-sliding wall for preventing the shallow solidifying body from sliding. The invention also provides a construction method of the shallow solidifying body, the anti-sliding wall and the deep replacement body in the shallow soft soil foundation solidifying structure. The shallow soft soil foundation solidifying structure and the construction method have the beneficial effects that the process can take materials on site, can make full use of weak mud or mucky soil on site, is lowin cost, environment-friendly and ecological and can be widely used in dams, roads, docks, storage yards, underground continuous walls, cement mixing piles and other fields.

The invention relates to the technical field of soil sampling, in particular to sampling storage equipment for soil detection. The equipment comprises a cylinder body, a sampling structure, a limitingstructure, an anti-loss structure, a discharging structure and a dehydration structure, wherein a sampling structure is arranged in the cylinder body; sludge on the river bank can be conveniently sampled in a labor-saving manner; a limiting structure is arranged, and therefore the sampling structure can be limited and fixed; the sampling structure is prevented from sliding when the sludge is taken out after sampling is finished; the sampling structure is used for sampling sludge while driving the discharging structure to work; the discharging structure works, and can act on the anti-loss structure; via the sampling storage equipment, sludge in the sampling structure can be discharged, the sampling structure can drive the dehydration structure to work while conducting sampling work, and the stored sludge can be subjected to extrusion dehydration work through the work of the dehydration structure, so that the sludge can be conveniently stored, and late-stage detection of the sludge canalso be facilitated.

The invention provides an earth pressure balance shield muck workability and improvement optimization evaluation test system and method. The test system comprises a horizontally-arranged test cylinder, an axial loading device for simulating a pushing mechanism of the shield tunneling machine, a radial extrusion ring bag for simulating a dumping mechanism of the spiral conveyer, a water supply system for applying different water pressures, a shearing rod for collecting soil sample strength, a test bin pressure sensor for collecting pore water pressure and the like. The test method comprises thestep of comprehensively testing the workability of the soil sample under the simulated working condition of controlling any one of the soil discharge speed and the pushing pressure under different water pressure conditions or controlling the synchronous change of the soil discharge speed and the pushing pressure. The workability test of the soil sample comprises any one or more of permeability, strength and deformation characteristics. Data measured by the test system and the test method are more scientific and objective, certain automatic control intellectualization is achieved, and the testsystem and the test method are particularly suitable for simulating soil pressure balance shield muck workability related test research under special working conditions such as rich water.

The invention discloses a heading machine excavation cabin pressure measuring system and an application method thereof, and solves the technical problem that an existing earth pressure sensor cannot accurately measure the earth pressure of an excavation cabin. The heading machine excavation cabin pressure measuring system comprises an earth pressure sensor arranged in an excavation cabin, the earth pressure sensor is provided with a flushing system, and a nozzle of the flushing system leads to a detection surface of the earth pressure sensor. The soil pressure sensor with wrong reading can bescoured, muck accumulated on the front portion of the soil pressure sensor is scoured cleanly, and therefore the water and soil pressure of an excavation cabin can be measured more accurately. The application method of the heading machine excavation cabin pressure measuring system can automatically judge whether the reading of the earth pressure sensor is wrong or not, can automatically flush theearth pressure sensor with the wrong reading, can monitor the flushing flow in real time, can be matched with the muck viscosity in real time, and can reasonably adjust the flushing amount on the premise of not influencing the viscosity of the muck.

The invention discloses an earth pressure balance shield muck improvement effect evaluation method based on tunneling energy, and the method is characterized in that the method comprises the followingsteps: (1) calculating the initial tunneling specific energy of a representative stratum; (2) carrying out a representative stratum muck improvement tunneling test; (3) drawing a relation curve of modifier gradient and tunneling specific energy; (4) drawing a relation curve of penetration and tunneling specific energy; and (5) evaluating the improvement effect of the improver and selecting indexes. According to the method, through a representative stratum muck improvement tunneling test for controlling the modifier proportion or dosage gradient, the change relationship between the modifier gradient and the tunneling specific energy is established by utilizing the construction parameters of the earth pressure balance shield in the stratum to serve as an energy method for optimizing and evaluating muck improvement; and the optimal value of the modifier for on-site muck improvement can be selected according to the relationship curve form, so that the scientificity problem of an indoor test is solved, the limitation of a single shield construction parameter evaluation index is overcome, and the method can be applied to shield construction muck improvement effect evaluation and optimization of different soil stratums.