11 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.

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 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 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 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 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.