24 results about "Claypan" patented technology

The application discloses a single-row tooth rake head suitable for digging clay, a dredger and a method, and belongs to the technical field of dredgers. The single-row tooth rake head suitable for digging clay comprises a rake body, further comprises: a movable cover which is hingedly arranged on the front side of the rake body and is provided with a hydraulic oil cylinder between the movable cover and the rake body; a water flushing assembly which is arranged on the rake body and is used for cutting and flushing clay; a grid assembly which comprises a first grid and a second grid, the first grid is arranged on the rake body, and the second grid is arranged in the movable cover and is used for intercepting large pieces of clay; and a single-row rake tooth which is fixedly arranged at the front end of the movable cover through a tooth seat and is used for cutting into and crushing clay. The single-row rake tooth can effectively crush the clay layer, effectively avoid clay adhesion, reduce downtime, is suitable for clay digging operation scenes such as channel dredging and water conservancy engineering, and can effectively improve the clay digging efficiency and effect.

The application provides a design method of a road subsidence support steel pipe pile based on a pressure rod stability theory, comprising: a data measurement step, which obtains the following road data by measurement: road width, weight, road surface uniform load of a subsidence road, thickness of a silty clay layer, outer diameter and inner diameter of the steel pipe pile, and determines the width of the subsidence road which needs to be reinforced and supported; a first stress analysis step, which performs stress analysis on the subsidence road, establishes a vertical balance force equation of the subsidence road and a bending moment balance equation of the subsidence road; a second stress analysis step, which performs stress analysis on a single steel pipe pile anchor body, establishes a vertical force balance equation of the steel pipe pile, and obtains a critical vertical pressure value of the steel pipe pile; and according to the vertical balance force equation of the subsidence road, the bending moment balance equation of the subsidence road, the vertical force balance equation of the steel pipe pile, and the critical vertical pressure value of the steel pipe pile, the minimum arrangement number of the steel pipe pile is calculated, the liquefied land can be locally reinforced, and the overall stability of the liquefied land is improved.

The invention belongs to the technical field of hydrogeological detection, and discloses a single-well multi-channel in-situ corrosion test method, which is used for solving the problems of large occupied area, high cost and low efficiency of the existing in-situ corrosion test. According to the method, a multi-channel test tube is implanted into a one-time pore-forming test well, channels are isolated from one another, each channel is provided with an independent water inlet corresponding to an independent aquifer, the aquifer is filled with a quartz sand layer and a clay layer in a layered mode, and a miniature gypsum rock sample is hung in underground water in each channel; and synchronous and independent corrosion tests of a plurality of aquifers are realized. According to the method, independent gypsum rock in-situ corrosion tests of a plurality of aquifers are synchronously completed after one-time hole forming, the cost of the gypsum rock in-situ corrosion tests can be greatly reduced, and the test efficiency is improved; meanwhile, the problems of data distortion and the like caused by mixed flow of different aquifers are avoided, and the authenticity and the reliability of in-situ corrosion test data are remarkably improved.

A particle for delayed release of an active ingredient to a plant or seed wherein the particle consists of a composite material comprising an active ingredient component and a clay component, the active ingredient component comprises a microbial cell extract or a mixture of at least one type of amino acid and one or more negatively charged ions and / or neutral molecules wherein the mixture comprises at least one type of positively charged amino acid, and the clay component comprises a montmorillonite clay mineral. The clay component forms a layered stack in the composite material, and the active ingredient component is interposed between individual clay layers in the stack.

A testing device for the grouting effect of a subway shield tunnel includes a device box, a channel lining, a dense clay layer, a sandy silt layer, a silty clay layer, a tunnel system, and a measurement system. The dense clay layer, sandy silt layer, and silty clay layer are arranged sequentially from top to bottom within the device box. The channel lining is located in the middle above the dense clay layer. The tunnel system is arranged between the sandy silt layer and the silty clay layer. The measurement system includes a displacement sensor, a water-sensitive soil moisture sensor, and an earth pressure cell. The displacement sensor is installed on the top surface of the dense clay layer on both sides of the channel lining. The water-sensitive soil moisture sensor is arranged between the channel lining and the tunnel system. The earth pressure cell is located within the silty clay layer. A method for testing the grouting effect of a subway shield tunnel is also provided. This invention not only enables the testing of the grouting effect of subway shield tunnels but is also simple, easy to operate, inexpensive, and has a short cycle time.

Pond (1) for water retention in the landscape, wherein the pond (1) comprises a water reservoir (2) and an earth embankment (3) for water retention, wherein the earth embankment (3) surrounds the water reservoir (2) over at least one quarter of the circumference of the water reservoir (2), wherein the water reservoir (2) comprises a bottom (7) of the water reservoir (2), characterized in that the pond (1) further comprises an underground clay layer (4) for limiting the escape of water from the water reservoir (2) by underground seepage, wherein the underground clay layer (4) is arranged under at least a part of the earth embankment (3), wherein at least a part of the earth embankment (3) is in contact with the underground clay layer (4).

The application relates to the technical field of caisson construction, and particularly discloses a caisson structure with a preset sinking channel and a construction method, which comprises a caisson entity structure and a sinking channel. The caisson entity structure is arranged above the sinking channel and comprises multiple longitudinal and transverse intersecting well walls, which separate the caisson into multiple well bin areas. The well wall is a double-wall type concrete wall body, and an upper and lower through middle hollow body is formed by an outer well wall, an inner well wall and a longitudinal and transverse intersection point. The sinking channel is formed by multiple groups of channel piles. The channel piles comprise wall-under channel piles, wall-out channel piles and wall-inter channel piles. The wall-inter channel piles correspond to the positions of the middle hollow body. The wall-under channel piles are arranged below the wall-under cutting feet. The wall-out channel piles are arranged outside the outer well wall and the inner well wall. The caisson can be constructed in different soil layers, can be balancedly and accompaniedly sunk during the construction process, and can be constructed through deep clay layers. The provided deep foundation reinforcement and bottom sealing scheme can realize dry excavation of the well bin earthwork.

The present application relates to pile foundation detection technical field, specifically to a kind of pile foundation detection equipment, including conical ring, still including detection ring, rotating ring, intelligent sensor, locking assembly, pressure sensor, control module and fixed ring, driving mechanism is installed in the detection ring inside.The present application is judged limiting state by pressure sensor and control module after locking assembly is kept concentric limit after opening and pile foundation, then remove driving mechanism restriction, and according to the mode that the probe end of intelligent sensor is tightly attached to the outer periphery of pile foundation by the way that the corresponding number of turns is rotated to corresponding direction by driving mechanism according to pressure sensor feedback value, solve the problem that when the mud soft clay layer area in the southeast coastal area and inland lake sediment plain etc. of our country is detected, the mud containing clay particles seriously interfere with ultrasonic wave when using acoustic transmission method to detect pile foundation, affect pile foundation detection precision and detection efficiency.

Methods for cavern rubblization for enhanced potash recovery are disclosed. In embodiments, such a method includes pressure cycling. The method can include pressurizing a cavity to maximum flow capacity followed by rapid relief of the cavity pressure. In this embodiment, this cycle of pressurization and rapid relief is repeated several times. Other embodiments of cavern rubblization and methods for enhanced potash recovery, a technique of fluid pulsing is used. According to embodiments, a tool can be used to pulse pressure through clay seams to be wetted. According to both embodiments, these methods increase potash recovery during mining.

The utility model provides an open-pit coal mine goaf backfill differential settlement monitoring device, a rock layer and a clay layer are arranged above a coal mine goaf, a monitoring hole is formed in the clay layer, a grouting body is arranged in the monitoring hole, the monitoring device comprises a positioning pipe, the positioning pipe is vertically fixed in the grouting body, and the grouting body is arranged in the positioning pipe. A detachable sealing plug is fixed to the top of the positioning pipe, and a limiting hole is formed in the sealing plug. The monitoring rod is connected to the interior of the positioning pipe, a connector is fixed to the bottom of the monitoring rod, a threaded section is arranged on the connector, and the monitoring rod is slidably connected to the interior of the sealing plug; and a connecting cylinder, a fixing hole is arranged in the rock layer, the connecting cylinder is fixed in the fixing hole, and the inner wall of the connecting cylinder is provided with an internal thread matched with the connector.

The utility model discloses an anti-seepage and anti-slope-collapse structure of a slope bank. The anti-seepage and anti-slope-collapse structure comprises an anti-seepage clay layer, a GCL geosynthetic clay liner, an HDPE geomembrane and a non-woven fabric, the anti-seepage clay layer, the GCL geosynthetic clay liner, the HDPE geomembrane and the non-woven fabric are sequentially laid on the slope bank base layer from bottom to top. An anchoring assembly is arranged on the non-woven fabric; the anchoring assembly is used for anchoring connection between the HDPE geomembrane and the non-woven fabric, and meanwhile cooperation between the non-woven fabric and the backfill soil is enhanced. According to the anti-seepage and anti-collapse structure for the slope bank, the problem that the contact surface of the non-woven fabric and the HDPE geomembrane is prone to sliding is solved, the anti-seepage and anti-collapse structure for the slope bank is more stable, the anti-sliding and anti-collapse capacity of the slope bank or the area scoured by water power is improved, and the long-term stability of the slope bank structure is ensured.

The invention discloses a method and system for determining the minimum waterproof thickness of a clay layer in a mining area, and relates to the technical field of evaluation of the minimum waterproof thickness of the clay layer. Constructing an elastic foundation beam mechanical model according to the geological data; unconsolidated formation parameters of the elastic foundation beam mechanical model are determined through geological data and laboratory tests; determining the tensile failure minimum thickness according to the maximum tensile stress of the beam end; determining the shear failure minimum thickness according to the maximum shear force of the beam end; sensitivity analysis is conducted on the unconsolidated formation parameters, and the minimum water-resisting layer thickness under different working conditions is obtained; and obtaining the minimum waterproof thickness of the clay layer based on the minimum waterproof layer thicknesses under different working conditions. Aiming at the problem that the water insulation performance of a clay layer is damaged due to the development of a water flowing fractured zone in coal mining, the bearing capacity of the clay layer in a tensile and shear failure mode is quantified by constructing a mechanical model, targeted water prevention and control measures can be formulated in advance, and water inrush accidents are prevented.

This utility model relates to a cofferdam for river management projects, comprising two Larssen piles driven into the bottom layers of silt, loam, and clay in sequence. Each Larssen pile has a top beam welded to its upper outer side, and the top beams are connected and fixed by steel reinforcement rods. Upstream of the Larssen piles, above the silt layer, is a ballast rock, and downstream, above the silt layer, is a ballast bag filled with soil. The entire interior section of both Larssen piles is filled with soil bags. The inner side of the Larssen piles is covered with tarpaulin along its height. A beam support plate is welded to the lower part of the top beam on the outer side of the Larssen piles. This utility model has a simple structure and, through the steel reinforcement rods, ballast rock, ballast bagged soil, and soil bags, can comprehensively ensure the overall stability of the cofferdam, improving its strength and performance.

The invention relates to the technical field of tunnel construction, in particular to a tunnel construction method and a supporting structure under the condition of deep and thick clay layer surrounding rock.The tunnel construction method comprises the following steps that S1, after supporting of an excavated section is completed, an insertion pipe is arranged in a to-be-excavated structure of a tunnel, and the insertion pipe extends in the longitudinal direction of the tunnel; s2, pushing and pressing the intubation tube along the longitudinal direction of the tunnel to enable the tail end of the intubation tube to be located in front of the tunnel face; a soil body between the tail end of the insertion pipe and the tunnel face is excavated; a supporting structure is constructed on the newly excavated tunnel section; and S3, repeating the step S2. According to the tunnel construction method under the surrounding rock condition of the deep clay layer, the insertion pipe is driven into the to-be-excavated structure in front of the tunnel face in advance, so that the stability of a soil body in front of the tunnel face can be improved, the tunnel collapse risk caused by creep deformation of the tunnel face in the construction process is reduced, the area of a single excavation section during construction is increased, and the construction efficiency is improved. The construction efficiency is improved.

The application relates to the technical field of foundation pit support technology, and particularly discloses a foundation pit support structure of a soft soil foundation and a construction method thereof. The foundation pit support structure of the soft soil foundation comprises a soft soil layer and a cinder layer, a groove is arranged above the cinder layer, a clay layer is filled in the groove, and a foundation pit retaining wall is built in the clay layer. A horizontal mounting bracket is mounted on the upper side of the soft soil layer, an intercepting frame is welded on the upper side of the side of the mounting bracket close to the clay layer, the clay layer and the cinder layer are located on the opposite sides of the intercepting frame, and an intercepting net is welded on the side of the intercepting frame close to the cinder layer. A reinforcing assembly is arranged on the upper side of the mounting bracket, the reinforcing assembly applies a pulling force away from the clay layer to the intercepting frame, the intercepting net and the intercepting frame cooperate to reduce the movement of cinder particles to the clay layer, thereby reducing the cinder particles entering the clay layer, and the application improves the problem that the cinder particles are prone to damaging the water stop curtain as a whole.

This invention relates to the field of tunnel construction technology, and particularly to a tunnel construction method and support structure under deep clay layer surrounding rock conditions. The tunnel construction method includes the following steps: S1. After completing the support of the excavated section, inserting a pipe into the structure to be excavated in the tunnel, with the pipe extending longitudinally along the tunnel; S2. Pushing the pipe longitudinally along the tunnel so that the tail end of the pipe is in front of the tunnel face; excavating the soil between the tail end of the pipe and the tunnel face; constructing a support structure for the newly excavated tunnel section; S3. Repeating step S2. The tunnel construction method under deep clay layer surrounding rock conditions described in this invention, by pre-inserting the pipe into the structure to be excavated in front of the tunnel face, can improve the stability of the soil in front of the tunnel face, reduce the risk of tunnel collapse caused by tunnel face creep during construction, and facilitate increasing the area of ​​the single excavation section during construction, thereby improving construction efficiency.

The utility model discloses a soft soil roadbed drainage structure, and particularly relates to the technical field of road engineering, which comprises a soft soil roadbed base body, and further comprises a trapezoidal engineering gravel layer and a tamped clay layer which are sequentially arranged above the soft soil roadbed base body along the vertical direction, anti-seepage geotechnical cloth is paved on the tamped clay layer, a fine sand layer is paved on the anti-seepage geotechnical cloth, and a waterproof layer is paved on the fine sand layer. A first gravel layer is laid on the fine sand layer, and a permeable asphalt layer is laid on the first gravel layer. According to the drainage structure provided by the utility model, the supporting strength of a road is improved by utilizing a trapezoid formed by the engineering gravel layer and the tamped clay layer, and meanwhile, the anti-seepage geotechnical cloth has an anti-seepage effect, so that the problem that the engineering gravel layer and the tamped clay layer are collapsed due to rainwater seepage is solved; the shear strength is improved through the fine sand layer and the first gravel layer, and water permeating through the permeable asphalt layer, the fine sand layer and the first gravel layer flows along the anti-seepage geotechnical cloth and is drained to the two sides of the road, so that rainwater on the road surface is reduced.

The application discloses a remediation agent for repairing DNAPL pollution based on chemical oxidation and a preparation method thereof. The remediation agent comprises 32.5-49.5 wt% of an oxidant and 50.5-67.5 wt% of a composite leaching agent. The composite leaching agent is composed of 12.5-24.5 wt% of sodium dodecyl sulfate, 21.5-32.9 wt% of a plant polyphenol polyoxyethylene ether, 6-18 wt% of polyethylene glycol and 24.6-60 wt% of deionized water. DNAPL pollutants existing in soil are leached out by the composite leaching agent, and the leached DNAPL pollutants are treated by oxidation. When DNAPL pollutants exist in areas where oxidants cannot reach, such as fractured layers or clay layers, or when soil or stones prevent the oxidant from diffusing quickly, completely and uniformly, the repair period of in-situ chemical oxidation technology is greatly prolonged.

The invention discloses a single-row-tooth rake head suitable for digging clay, a dredger and a method, and belongs to the technical field of dredgers. A single-row-tooth rake head suitable for digging clay comprises a rake body and further comprises a movable cover, the movable cover is hinged to the front side of the rake body, and a hydraulic oil cylinder is arranged between the movable cover and the rake body; the flushing assembly is arranged on the rake body and used for cutting and flushing clay; the grating assembly comprises a first grating and a second grating, the first grating is arranged on the rake body, and the second grating is arranged in the movable cover and used for intercepting large clay blocks; the single row of rake teeth are fixedly arranged at the front end of the movable cover through a tooth holder and are used for cutting in and crushing clay; the single-row rake teeth effectively crush a clay layer, clay adhesion is effectively avoided, the shutdown time is shortened, the single-row rake teeth are suitable for clay excavation operation scenes such as channel dredging and water conservancy projects, and the clay excavation efficiency and effect can be effectively improved.

The application relates to the technical field of reservoir seepage prevention, and particularly discloses a full-reservoir basin seepage prevention structure for a pumped storage power station, which comprises a foundation layer and a seepage prevention monitoring layer; the seepage prevention monitoring layer comprises a lower geomembrane, an inter-membrane clay layer and an upper geomembrane; a plurality of fine sand cells are arranged between the lower geomembrane and the upper geomembrane; and a wireless osmometer is arranged in each fine sand cell. The upper geomembrane, the inter-membrane clay layer and the lower geomembrane form a seepage prevention structure, seepage is difficult to pass through the inter-membrane clay layer and the lower geomembrane after the upper geomembrane is damaged, so that the loss of fine particles of the foundation layer can be effectively prevented. Meanwhile, since the water-stop connecting plates and the fine sand cells are arranged, reservoir water leaked from a leakage point will flow to the corresponding fine sand cell, so as to trigger the wireless osmometer in the fine sand cell, make the wireless osmometer send a signal, and facilitate the power station operator to quickly locate the leakage position, and the economic efficiency and safety of the pumped storage power station of the full-reservoir basin seepage prevention type are significantly improved.

The invention discloses an indoor coprinus comatus planting and fruiting device which comprises a fruiting frame arranged in a planting shed, the fruiting frame is longitudinally divided into multiple layers, and multiple sets of fruiting frames are evenly arranged on each layer; the fruiting frame is of a cuboid structure with the peripheral side faces closed, a plurality of drainage and ventilation holes are formed in the bottom of the fruiting frame, and the bottom of an inner cavity of the fruiting frame is filled with thick nutrient slurry. The nutrient slurry formula is formed by blending granular clay or sandy soil and nutrient water, the thick nutrient slurry is filled with a round fungus bag, the round fungus bag is a coprinus comatus strain, and the round fungus bag is covered with a granular clay layer; the position, 1 cm below the horizontal diameter line, of the circular fungus bag is immersed in the mud. The indoor coprinus comatus planting and fruiting device is reasonable in structure, accurate in nutrition supply, excellent in ventilation and drainage performance, good in fruiting guidance quality and convenient for standardized operation.

The utility model relates to an operation system for constructing a preformed hole stiffening core composite pile. The operation system comprises drilling equipment, a circulating slurry pump, a slurry conveying pipe, a crane and at least two circulating pools. The drilling equipment is used for drilling preformed holes, the circulating slurry pump can rotate forwards and reversely, and the circulating slurry pump communicates with a drill rod of the drilling equipment; the at least two circulating pools are sequentially communicated, the first circulating pool in the at least two circulating pools is a head-end circulating pool, and the last circulating pool is a tail-end circulating pool; the first end of the slurry conveying pipe is connected with the circulating slurry pump, the second end of the slurry conveying pipe can be communicated with any one of the at least two circulating pools, and a discharging opening is formed in the head-end circulating pool and used for being communicated with a preformed hole; the crane is used for hoisting the prefabricated core pile. The operation system has the advantages that waste mud and muck generated in the hole forming process of preformed holes can be effectively recycled, and the operation system can be suitable for preformed hole stiffening core composite pile construction in soft soil areas and areas with thick and hard clay layers or rock stratums at the same time.

The invention provides a large-diameter earth pressure balance jacking pipe and a construction method. The construction method comprises the following construction steps: constructing a working well and a receiving well; guide rail construction; construction of a reinforcing bracket for underneath passing of the existing pipeline; carrying out jacking construction on a clay layer by a pipe jacking machine; and the clay layer pipe jacking machine carries out jacking construction when encountering an underground timber pile group. According to the large-diameter pipe jacking construction method, precise guide control, existing pipeline micro-disturbance protection, efficient muck conveying and impurity-containing slag discharging system blockage prevention are integrated, and construction safety, efficiency and economy are improved.