24 results about "Siltstone" patented technology

The invention discloses a fully-weathered argillaceous siltstone elastic-plastic damage constitutive model establishing system, and relates to the technical field of elastic-plastic damage constitutive models.The system comprises a parameter collecting and labeling module used for obtaining a data set and conducting classification labeling and test condition information; the parameter processing and matching module is used for preprocessing the parameters to extract a feature parameter set and performing information association to supplement boundary condition data; the damage elastic-plastic feature module is used for presetting a database and a weight distribution rule and performing weighted fusion to form a damage elastic-plastic coupling feature parameter set; the constitutive model construction module is used for constructing a constitutive model, performing iterative training on the constitutive model and calculating damage parameters and a prediction result; and the model verification report module is used for verifying the damage parameters and the prediction result and judging the effectiveness of the constitutive model according to the verification result. According to the method, the multi-dimensional core characteristic parameter set is constructed by obtaining mechanical property test parameters and the like, and the limitation of single test data is broken through.

The invention discloses an argillaceous siltstone geological anchorage deep foundation pit construction method, which relates to the technical field of building construction, and comprises the following steps: collecting stratum structure data, hydrogeological data and surrounding environment data of an anchorage area; determining an integral foundation pit form; a supporting scheme is designed, and a supporting structure type, a construction process and safety prevention and control measures are determined; verifying the stability of the supporting structure; construction resource investment, construction period and risk assessment data of different support schemes are collected, cost-benefit comparative analysis is carried out, and an optimal construction scheme is screened; the construction state is fed back in real time; and the anti-collapse, anti-seepage and anti-disturbance construction requirements under the muddy siltstone geological scene are met. According to the deep foundation pit construction method, a deep foundation pit construction full-process solution matched with the geological scene is formed by adopting double-row secant pile supporting, a targeted cast-in-situ bored pile and anchor cable construction technology and a near-high-rise special monitoring and inner supporting optimization technology.

The invention relates to a method for preparing thick mud from shield siltstone slag to prevent slurry loss, and belongs to the technical field of urban underground engineering construction. The method for preparing thick mud from shield siltstone slag to prevent slurry loss comprises the following steps: preparation of slurry: taking bentonite slurry as base slurry, and then adding waste weathered rock powder, calcium carbonate, sodium carbonate, xanthan gum or electropositive gel to prepare plastic flowing slurry, so that the slurry reaches certain density and viscosity; in the tunneling process of the shield tunneling machine, prepared slurry is injected out of a shield shell through a plurality of grouting holes in the radius direction and formed in the circumferential direction of the shield shell of the shield tunneling machine, and the slurry is diffused along the surface of the shield shell and fills gaps of a shield body within a certain range; according to the method, the waste soil generated by the shield tunnel can be effectively utilized, the moisture content and fluidity of the cabin soil are controlled, meanwhile, shield tail cement grout is prevented from entering the cutterhead and the soil cabin to threaten construction safety, operation is easy and economical, and the construction efficiency is improved.

The utility model provides a kind of microbiological solidification of making sample device for pisha sandstone, including making sample bottom cavity, making sample bottom plate, making sample cylinder and making sample top plate, at least four connecting springs are installed in the inner bottom surface of making sample bottom cavity with equal interval, making sample bottom plate is sleeved in making sample bottom cavity, and the top end of connecting spring is clamped in the bottom surface of making sample bottom plate;Making sample cylinder is clamped on making sample bottom plate, four making sample connecting columns are peripherally set with equal interval on making sample bottom plate outside making sample cylinder, making sample top plate is clamped at the top end of making sample cylinder by the effect of making sample connecting column and lock nut, and making sample operation is completed between making sample bottom plate, making sample cylinder and making sample top plate.The utility model can drive the vibration of making sample bottom plate and connecting spring in making sample bottom cavity by the vibration of vibration motor in use process, so as to mix pisha sandstone particles in making sample cylinder with bacteria liquid and reaction liquid uniformly, and the overall quality of prepared sample body is facilitated to improve.

The present invention discloses a method for determining the sealing thickness of a complex lithologic layer based on temperature-stress field simulation, comprising: determining the vertical superposition relationship and the total thickness of the siltstone layer and the mud shale layer according to the vertical distribution characteristics of the lithologic properties of the overlying strata within a set range; obtaining the respective formulas for preparing siltstone and mud shale through experimental fitting; preparing a top plate rock sample by integral molding; arranging multiple groups of temperature sensors and strain sensors on the side of the rock sample at set intervals; heating the rock sample to a set bottom temperature, applying stress to the bottom of the rock sample step by step from small to large to a set stress, and stabilizing at the temperature and stress until the sensor measurement values ​​stabilize; determining the lower limit of the top plate sealing thickness according to the measurement values ​​of each sensor and the vertical superposition relationship; and similarly determining the lower limit of the bottom plate sealing thickness. This method can reasonably quantify the lower limit of the top and bottom plate sealing thickness of a complex lithologic shale reservoir by simplifying the joint simulation of lithologic properties and temperature and stress fields.

The application relates to the technical field of carbon dioxide storage simulation experiments, and discloses a simulation test device and method for monitoring fault activity of carbon dioxide storage, wherein a geological similar body is filled in a test box body, and the geological similar body comprises, from a low layer to a top layer in the test box body, a first fine sandstone layer, a coal layer, a siltstone layer, a conglomerate layer and a second fine sandstone layer; the first fine sandstone layer, the coal layer, the siltstone layer and the conglomerate layer are misaligned and filled in the test box body to form a fault structure; a carbon dioxide injection assembly and a water injection assembly are respectively located outside the test box body, and an output end of the carbon dioxide injection assembly is inserted into a fault position of the siltstone layer; an output end of the water injection assembly is inserted into the conglomerate layer; the application realizes real-time recording and monitoring of the mechanical behavior of a stratum and the change of an environmental thermal state during carbon dioxide injection and storage by using multiple sensors for real-time monitoring.

This invention provides a digging and flushing device for a submerged shaft boring machine. The cutting head is driven to rotate within a housing, using its surface cutting teeth to break up the rock and soil at the bottom and walls of the shaft. A slurry pump is mounted on the housing. By placing a first flushing component at a first predetermined position between the slurry pump inlet and the cutting head, and a second flushing component at a second predetermined position after the cutting head has rotated past the slurry pump inlet, the first flushing component performs high-pressure flushing in the suction chamber area where soil is first generated and most prone to adhesion. This disrupts the adhesive structure of the soil at its source, preventing it from adhering to the cutting head surface and forming mud cakes. Even if a small amount of soil is not flushed away by the first flushing component, the second flushing component performs secondary cleaning within the digging chamber, further reducing the risk of mud cake formation. This dual flushing mechanism significantly improves the adaptability of the cutting head in strata prone to mud cake formation, such as argillaceous clay and silty mudstone. The synergistic effect of both components achieves full-process flushing coverage for each rotation cycle of the cutting head.

The present invention discloses a method for determining the lower limit of the plugging thickness of the siltstone adjacent layer of a shale reservoir, comprising: determining that the fracture pressure of the shale reservoir is less than the minimum starting pressure of the overlying siltstone layer, and performing the following steps: arranging a heating, pressurizing, and stressing device and temperature, pressure, and strain sensors on the bottom surface of a roof rock sample, and arranging multiple groups of pressure and strain sensors on the side at set intervals; heating the bottom of the rock sample to a set temperature using a heating device, pressurizing the bottom to a first set pressure using a pressurizing device, and applying stress to the bottom of the rock sample step by step from small to large to a first set stress using a stressing device, and stabilizing until the measurement values ​​of each sensor are stable, and determining the lowest position where the pressure of the rock sample is not higher than the second set pressure and the strain is not higher than the set strain based on the sensor measurement values; then determining the lower limit of the roof plugging thickness; and similarly determining the lower limit of the bottom plate plugging thickness. This method can reasonably quantify the lower limits of the roof and bottom plate plugging thicknesses through joint simulation of temperature, pressure, and stress fields.

The invention provides a naming method for salt lake mixed rock. The naming method comprises the following steps: carrying out rock division by using terrestrial clastic particles, carbonate particles and miscellaneous bases; using 50% as a boundary to distinguish siltstone and limestone; according to a sedimentary structure, the land-derived debris particle component is divided into a stratified structure, a blocky structure, a deformed structure and a wave-formed staggered bedding, siltstone is taken as a basic name when the land-derived debris particle component is larger than 50%, silty sand is taken as a basic name when the land-derived debris particle component is 25%-50%, and silty sand is taken as a basic name when the land-derived debris particle component is 15%-25%; dividing the lithofacies by taking the component characteristics and sedimentary structure characteristics of the rock as a division basis according to the conditions of the rock core and the slice; salt lake lithofacies are divided into three major classes, namely siltstone facies, granular limestone facies and marlstone facies, and are subdivided into ten lithofacies subclasses. The method provides a standardized new thought for lithofacies division in a salt lake deposition system, a standard reference is provided for lithofacies naming through outcrop observation, and a lithofacies division standard is formulated according to the scheme according to the deposition structure, the component content and the like.

The present invention discloses a method for determining the sealing thickness of a siltstone layer based on temperature-pressure field simulation, comprising: determining that the fracture pressure of a shale reservoir is less than the minimum starting pressure of an overlying siltstone layer, and executing the following steps: wrapping the side of a roof rock sample with a thermally insulating sealing material, arranging a heating and pressurizing device and temperature and pressure sensors on the bottom surface of the rock sample, and arranging multiple pressure sensors on the side of the rock sample at set intervals; heating the rock sample with a heating device to a set bottom temperature, and pressurizing the rock sample with a pressurizing device to a set bottom pressure, stabilizing the temperature and pressure until the measured values ​​of each sensor are stable, determining the lowest position where the rock sample pressure is no higher than a second set pressure based on the measured values ​​of the sensors; determining the lower limit of the roof sealing thickness based on the distance from this position to the bottom surface; and similarly determining the lower limit of the bottom sealing thickness. This method can reasonably quantify the lower limit of the top and bottom plate sealing thickness of a shale reservoir through the combined simulation of the temperature field and the pressure field.

The present invention provides a construction method for exiting and penetrating a weathered siltstone tunnel in a broken shallow buried section. According to the on-site topography and geology, surface steel flower pipes are adopted at the surface position of the tunnel vault in the weak surrounding rock for grouting reinforcement as a whole. At the small pile entrance section, n rows of steel pipes with built-in reinforced steel cages are adopted as an advance pipe rack, which penetrates above the heading face of the large pile exit section and is combined with a double-layer advance small guide pipe as an advance support. The tunnel body adopts a system anchor rod + double-row lock-foot anchor rod to reinforce the steel arch frame to improve the overall stability of the support. When penetrating, the support is closed into a ring in time by using a three-step advance construction to improve the overall force of the support. The technical problem that the weathered siltstone tunnel may have large tunnel settlement or even roof collapse and large safety risks during the penetrating construction in the broken shallow buried section is solved. The method enables the excavation of the broken shallow buried section to be carried out by the drilling and blasting method. Compared with the existing technology that usually adopts the manual combined with mechanical excavation method in the broken shallow buried section of the tunnel, the construction efficiency of the tunnel penetration is improved.

The cofferdam structure comprises a plurality of steel pipe pile implanting holes which are distributed along the periphery of a cofferdam area at intervals, the steel pipe pile implanting holes are filled with clay, steel pipe piles are arranged in the steel pipe pile implanting holes in a penetrating mode, the lower ends of the steel pipe piles are inserted into the clay, and the lower ends of the steel pipe piles are inserted into the clay. The adjacent steel pipe piles are connected together through the steel sheet piles, the interval space between the adjacent steel pipe piles is sealed by the steel sheet piles, the lower ends of the steel sheet piles are nailed in the ground of a cofferdam area, a cofferdam wall is defined by the steel pipe piles and the steel sheet piles, and a plurality of reinforcing hoops distributed in the vertical direction are arranged on the inner surface of the cofferdam wall. And a plurality of horizontal supports for preventing the reinforcing hoop from deforming are arranged in the reinforcing hoop. The utility model aims to provide the cofferdam structure based on the medium-weathered argillaceous siltstone deep and thick pebble covering geology, which can conveniently realize construction in the medium-weathered argillaceous siltstone deep and thick pebble covering geology, and provides a novel cofferdam structure.

The application discloses a method for determining the shale reservoir siltstone adjacent layer plugging thickness based on pressure field simulation, comprising the following steps: if it is judged that the shale reservoir fracture pressure is less than the minimum starting pressure of the overlying siltstone layer, the following steps are executed: preparing a roof rock sample by using the overlying siltstone coring section, wrapping the roof rock sample by using a sealing material, arranging a pressurizing device and a pressure sensor on the bottom surface of the rock sample, and arranging a plurality of pressure sensors on the side surface of the roof rock sample at a set interval; pressurizing the roof rock sample to the bottom to a set pressure by using the pressurizing device, and stabilizing at the pressure until the change amplitude of the measurement values of all the pressure sensors is less than a set threshold value; determining the lowest position of the roof rock sample at which the pressure is not higher than a second set pressure according to the measurement values of the pressure sensors; determining the lower limit of the roof plugging thickness according to the distance from the position to the bottom surface; and determining the lower limit of the floor plugging thickness in the same way. The method can reasonably quantify the lower limit of the roof and floor plugging thickness of the shale reservoir by the method of pressure field simulation.

The application provides a marine wide-azimuth data deep dessert prediction method, a storage medium and equipment, including the following steps: carrying out nested identification on well logging, identifying a dessert reservoir, and obtaining a well logging elastic threshold value of the dessert reservoir; using marine wide-frequency wide-azimuth seismic data volume to carry out pre-stack inversion, comparing the inversion result with well logging data, and obtaining an elastic parameter volume of the dessert reservoir; and identifying the dessert reservoir according to the elastic parameter threshold value of the dessert reservoir and outputting a result. The application effectively eliminates the interference of mudstone, siltstone and dry layer and the like through the nested identification mode, and the dessert reservoir is identified on the premise, so that the identification accuracy of the dessert reservoir can be improved. The well logging intersection analysis is taken as a benchmark, and the pre-stack inversion of the fine offshore wide-frequency data is taken as a basis, so that the inversion result and well logging error are effectively reduced, and the accuracy of quantitatively explaining the dessert reservoir according to the elastic parameter volume obtained through well analysis is improved.

The invention relates to a tight sandstone lithofacies identification method and device, electronic equipment and a storage medium, and belongs to the technical field of geological prospecting, and the tight sandstone lithofacies identification method comprises the steps: carrying out the identification of a to-be-detected tight sandstone lithofacies based on a pre-established cross plot, and obtaining a first identification result, the first identification result comprises fine sandstone, mudstone sandstone, siltstone and mudstone; based on an electric imaging technology, further dividing an overlapping region of siltstone and mudstone in the first identification result to obtain a second identification result; on the basis of an electric imaging technology, fine sandstones in the first recognition result are further divided, third recognition results are obtained, and the third recognition results comprise low-resistance bulk fine sandstones, parallel / inclined layered fine sandstones, high-resistance bulk fine sandstones and stratified fine sandstones; and based on the first recognition result, the second recognition result and the third recognition result, obtaining a lithofacies recognition result of the to-be-detected compact sandstone. According to the invention, the accuracy of tight sandstone lithofacies identification can be improved.

The invention relates to the field of tunnel jacking construction, in particular to a settlement control system and method for large-section rectangular pipe jacking construction of a water-rich soft soil stratum.The settlement control system comprises a reinforcing module and a water stop curtain formed by U-shaped TRD construction method piles arranged on the peripheries of inlet and outlet holes of a pipe jacking starting well and a receiving well; the TRD construction method pile enters the moderately-weathered argillaceous siltstone by not less than 1m; an MJS pile full reinforcing layer is arranged on the lower portion of a pipe joint on the inner side of the TRD construction method pile, a three-axis stirring pile strong reinforcing layer is arranged on the portion, 3 m above the pipe top, of the lower portion of the pipe joint, a three-axis stirring pile weak reinforcing layer is arranged on the portion, 3 m above the top of the tunnel, of the ground, and a row of MJS pile welt reinforcing layers are arranged at the joint of the outer edge of the inlet hole and the diaphragm wall. A U-shaped waterproof curtain is formed by TRD construction method piles and penetrates into a moderately weathered rock stratum to ensure impermeability continuity, and an underground water seepage channel is blocked; the MJS piles fully reinforce the lower portion of the pipe joint and the hole opening area, the three-axis stirring piles are divided into the strong reinforcement area and the weak reinforcement area and correspond to different soil body positions, the water and sand gushing risk of the hole opening is reduced, and the settlement control capacity is improved.

The present invention discloses a method for determining the lower limit of the sealing thickness of a complex lithologic layer based on temperature field simulation, comprising: determining the upper and lower superposition relationship and the total thickness of the siltstone layer and the mud shale layer according to the lithologic vertical distribution characteristics of the overlying strata within a set range; obtaining the formula for preparing siltstone and mud shale respectively through experimental fitting; preparing a top plate rock sample by integral molding; arranging a heating device and a temperature sensor on the bottom surface of the rock sample, and arranging multiple temperature sensors on the side of the rock sample at set intervals; heating the rock sample by the heating device until the bottom temperature is a first set temperature, and stabilizing at this temperature until the measured values ​​of each temperature sensor are stable, and determining the lowest position where the rock sample temperature is no higher than a second set temperature; determining the lower limit of the top plate sealing thickness according to the superposition relationship and this position; and similarly determining the lower limit of the bottom plate sealing thickness. This method can reasonably quantify the lower limit of the top and bottom plate sealing thickness of a shale reservoir by simplifying the lithologic and temperature field simulation methods.

The application discloses a weakly cemented argillaceous siltstone starting pressure gradient law analysis method and device, which comprises the following steps: constructing multiple test cores; performing displacement tests on each core holder, timing each displacement test, and recording the displacement pressure, confining pressure change and displacement fluid capacity of the core holder; determining the starting pressure gradient in combination with the confining pressure change of the core holder in each displacement test, determining the real liquid production point of the test core in the displacement test process, and obtaining the minimum starting pressure gradient of each test core; fitting the relationship between the pressure gradient and the liquid production rate to obtain the pseudo starting pressure gradient of each test core; and fitting the relationship between the minimum starting pressure gradient and the pseudo starting pressure gradient and the formation parameters; the application determines the real liquid production point of effective displacement, improves the accuracy of data analysis, and determines the change law of the water phase starting pressure gradient of low-permeability loose argillaceous siltstone with the core seepage characteristics and the properties of formation fluid.

The present invention discloses a method for determining the sealing thickness of a complex lithologic layer based on a simplified lithologic combination, comprising: determining the vertical superposition relationship and the total thickness of the siltstone layer and the mud shale layer according to the vertical distribution characteristics of the lithologic properties of the overlying strata; preparing a roof rock sample by integral molding based on the properties of the siltstone and mud shale; arranging multiple groups of temperature sensors, pressure sensors, and strain sensors on the side of the rock sample at set intervals; heating the rock sample to a set temperature at the bottom, pressurizing it to a set pressure at the bottom, applying stress to the bottom of the rock sample step by step from small to large to a set stress, and stabilizing it at the temperature, pressure, and stress until the sensor measurement values ​​are stable; determining the lower limit of the roof sealing thickness according to the measurement values ​​of each sensor and the vertical superposition relationship; and similarly determining the lower limit of the bottom sealing thickness. This method reasonably quantifies the lower limit of the roof and bottom plate sealing thickness of a complex lithologic shale reservoir by simplifying the lithologic properties and jointly simulating the temperature field, pressure field, and stress field.

The present invention discloses a method for determining the lower limit of the sealing thickness of a complex lithologic layer based on pressure field simulation, comprising: determining the upper and lower superposition relationship and the total thickness of the two according to the lithologic vertical distribution characteristics of the overlying strata within a set range; obtaining the formula for preparing siltstone and mud shale respectively through experimental fitting; preparing a top plate rock sample by integral molding; arranging a pressurizing device and a pressure sensor on the bottom surface of the rock sample, and arranging multiple pressure sensors on the side of the rock sample at set intervals; pressurizing the rock sample with the pressurizing device to a set pressure at the bottom, and stabilizing it at this pressure until the measured values ​​of each pressure sensor are stable; determining the lower limit of the top plate sealing thickness according to the measured values ​​of the pressure sensors and the upper and lower superposition relationship of siltstone and mud shale; and similarly determining the lower limit of the bottom plate sealing thickness. This method can reasonably quantify the lower limit of the top and bottom plate sealing thickness of a shale reservoir by simplifying the lithologic and pressure field simulation methods.

The application discloses a kind of weak cementation argillaceous siltstone starting pressure gradient test method and device, including weak cementation argillaceous siltstone into core holder, vacuum and formation water saturation are extracted to core holder and weak cementation argillaceous siltstone in core holder;Set initial confining pressure, pressurize to core holder multiple times, until the outlet end of core holder no longer liquid outlet;And displacement fluid is sequentially increased in accordance with pump speed rate displacement test, time is counted for each displacement test, and the displacement pressure of core holder, confining pressure change and displacement fluid capacity are recorded;Change to variable pressure displacement, change according to displacement pressure control process displacement test to core holder, and the displacement pressure of core holder, confining pressure change and displacement fluid capacity are recorded;Confining pressure is sequentially adjusted, and displacement test is repeated, until the outlet end of core holder has no displacement fluid;The application designs sandstone core water phase starting pressure gradient test method under normal temperature and pressure conditions.

The application relates to a kind of shield foam wall post-grouting material using siltstone slag and a preparation method, and belongs to the technical field of shield tunnel construction.The shield foam wall post-grouting material using siltstone slag comprises slurry and water glass, and the slurry comprises cement 5-10% by mass fraction, fly ash 13-18%, sodium dihydrogen phosphate 0.1-0.6%, bentonite 4-8%, bubble liquid 0.5-2%, pretreated siltstone 34-39%, xanthan gum 1-5%, and the rest is water, and the volume ratio of the slurry to water glass is 1:0.1-0.14.The application replaces river sand with siltstone, solves the problem of difficult disposal of waste slag, is an economic and environmentally-friendly method for recycling waste soil, and has good environmental benefits.

The invention discloses an ultra-long permanent steel casing pile foundation of an argillaceous siltstone full-slewing drilling machine and a construction method, and belongs to the technical field of pile foundation engineering. The invention aims to solve the problems of difficult positioning, low steel casing connection efficiency and incomplete slag removal in the construction of the pile foundation in the argillaceous siltstone stratum. According to the technical scheme, the method is characterized in that a double-layer two-way positioning device composed of a steel casing hole opening and an adjustable balance positioning plate is used for achieving accurate installation of the full-slewing drilling machine; a drilling machine power head is used for driving the spliced steel casing with the pin groove structure to conduct mechanical lock splicing and burying; a gas lift reverse circulation process is adopted, and primary hole cleaning and secondary hole cleaning are completed through a slag cleaning cylinder and a slag cleaning head respectively. The device has the advantages of being accurate in positioning, efficient in construction, free of vibration, high in slag removal quality and the like, and is suitable for pile foundation construction under complex geological conditions.

The present invention discloses a method for determining the lower limit of the plugging thickness of a siltstone layer based on temperature-stress field simulation. The method comprises: determining that the fracture pressure of a shale reservoir is less than the minimum starting pressure of an overlying siltstone layer, and performing the following steps: wrapping the side of a roof rock sample with a thermal insulation material, arranging a heating and stress device and temperature and strain sensors on the bottom surface of the rock sample, and arranging multiple strain sensors on the side of the rock sample at set intervals; heating the rock sample with a heating device to a set temperature at the bottom; applying stress to the bottom of the rock sample in steps from small to large to a set stress using a stress device, and stabilizing the temperature and stress until the measured values ​​of each sensor are stable; determining the lowest position where the strain of the rock sample is no higher than the set strain based on the measured values ​​of the sensors; determining the lower limit of the roof plugging thickness based on the distance from this position to the bottom surface; and similarly determining the lower limit of the bottom plugging thickness. This method can reasonably quantify the lower limit of the top and bottom plate plugging thickness of a shale reservoir through the combined simulation of the temperature field and stress field.