78 results about "Claypan" patented technology

The invention provides a saline land improvement method appropriate for an arid and semi-arid region. The technical steps of surface soil stripping, bottom layer rolling compaction, claypan pavement and filling, high density polyethylene (HDPE) film coverage, organic mixed material pavement and filling, salt elimination blind pipe distribution, surface soil refilling, plant planting and the like are adopted for improvement; the method has the advantages that salt and alkali ion isolation, guide and discharge effects are good, organic matters are fully utilized for improving the soil quality and reducing salt and alkali ions, the resource utilization degree of wastes is high, the principal and secondary problems are both treated, the flow is simple, the cost is low, the in-situ remediation is realized, the surface soil resources are saved and the like; the method has wide application precepts and promotional value in the fields of environment protection, ecological remediation, park and garden construction and agricultural production, and excellent economic benefits, social benefits and ecological benefits can be created.

The invention discloses an expansive soil slope and a construction method. The slope toe angle of the slope is increased to steepen the slope, so that the slope surface water is mainly runoff when rain falls or water flows through to reduce seepage, and the moisture content in the expansive soil of the slope is controlled to be within a lower range to prevent the loss of stability due to expansion of the expansive soil after water absorption of the slope. According to the slope and the method, the varying slope of the expansive soil slope is 45-60 degrees to quicken the surface runoff of the rainwater; the surface of the slope is covered by a clay layer with thickness of 10 cm; fiber reinforcements with length of 20-25 cm are uniformly implanted into the surface of the slope and are exposed out of the clay layer for 3-5 cm; turfs of which roots develop well in the transverse direction but develop poorly in the longitudinal direction are planted on the clay layer.

The invention provides a serial drop water composite wetland system for treating the non-point pollution. The system is composed of a cuboid package, a wetland device, a wetland substrate and wetland plants; two same flow lines, namely a room temperature flow line 1 and a low temperature flow line 2 are connected in parallel to form the system; each flow line is composed of six cells and one water-collecting tank; and the wetland substrate has four layers, wherein the first layer, namely the topmost layer is a clay layer, the second layer is a fine sand layer, the third layer is the mixed layer of coal cinder and limestone and the fourth layer is a cobble layer. The device has the function of efficiently purifying sewage.

The invention discloses a construction method of a water stopping surrounding and protecting structure of a soft soil foundation building foundation pit. The construction method is characterized by comprising the following steps that a rock ballast layer is arranged on the soft foundation of the foundation pit to be constructed; a groove is downwards dug from the surface of the rock ballast layer around the foundation pit to be constructed until the depth of the dug groove reaches a low-permeability clay layer; homogeneous clay is filled into the groove for forming a clay water stopping curtain; a foundation pit blocking wall is arranged in the clay water stopping curtain, and the inner side and the outer side of the foundation pit blocking wall are respectively compacted and fixed by the homogeneous clay; a horizontal supporter is arranged in the foundation pit surrounded by the foundation pit blocking wall, and the construction of the water stopping surrounding and protecting structure is completed. The method has the advantages that the depth of the groove reaches the low-permeability clay layer, the good water stopping effect of the clay water stopping curtain is ensured, the maintenance work procedure of the clay water stopping curtain after the construction is not needed, the water stopping effect can be immediately realized after the construction completion, the construction process is fast and convenient, the construction work period is greatly shortened, the homogeneous clay can be locally dug in near places, and the construction cost is reduced.

The invention discloses a polyamide polymerization or copolymerization and clay nanometer composite material and making method, which comprises the following steps: adopting polyamide monomer, multivariate monomer copolymerization and organic disposed nanometer clay according to certain proportion to blend at high temperature for several hours; adding 10-20 percent ring-opening water to proceed polymerization reaction; exchanging amide salt between polyamide and cation in clay layers; plugging polyamide lattice in the clay lattice layers; dispersing clay nanometer dimension in the polyamide copolymerization to satisfy the necessary condition for polyamide and clay. The invention reinforces extension property, which saves energy and period.

The invention discloses a seepage and collapse prevention structure for foundation filling of a drainage pipeline and a construction method of the seepage and collapse prevention structure. The seepage and collapse prevention structure for foundation filling comprises a gravel foundation layer, a gravel foundation trench layer and a clay layer which are sequentially formed in a filling manner from bottom to top. The drainage pipeline is laid on the gravel foundation layer. A grouting pipe is anchored into the gravel foundation trench layer. Clay grout is injected into the gravel foundation layer and the gravel foundation trench layer through grouting holes in the grouting pipe. Clay is a soil body with cohesive force, the self-stabilization capacity is high, a hollow soil arch can be formed, and the soil body can be effectively prevented from being washed off. Besides, the drainage pipeline is wrapped with the clay sand layer with the water insulation capacity, rainwater and wastewater of the drainage pipeline are prevented from leaking out and polluting passing underground water, the underground water can be prevented from seeping into the drainage pipeline and being lowered in water level, and it is avoided that the underground water is mixed with the rainwater and wastewater and consequently the processing amount of a sewage plant is increased.

The invention provides an impact drill bit of a full-hydraulic reverse circulation drilling machine. The impact drill bit comprises compression springs, spring positioning sleeves, studs, locking nuts, an impactor, a conveying pipe welding assembly, bolts and a drill bit welding assembly. The impact drill bit has the advantages that the impact drill bit is scientific in design and unique in structure; the impactor and the drill bit welding assembly are smartly combined with each other, sufficient impact can be generated by the impactor to crush rock when large-aperture drilling operation is carried out on rock strata, accordingly, holes in the rock strata which are difficult to drill or cannot be drilled fundamentally can be easily drilled by the impact drill bit, and problems which urgently need to be solved in the industry for a long time can be solved; only little torque on drill pipes is generated by the impact drill bit, so that problems of insufficient power of an existing drilling machine and damage to existing drill pipes can be solved; excellent drilling service effects can be realized for geologic strata such as clay layers and sand layers by the impact drill bit of the full-hydraulic reverse circulation drilling machine, and the impact drill bit is particularly high in drilling speed and efficiency when used for drilling large-aperture holes in the rock strata.

The invention discloses a method for remediating contaminated soil and underground water through in-situ aeration. The method comprises the following steps: determining a contaminated site, surveyingand setting out, arranging a chemical injection well, arranging an aeration drainage plate, injecting chemicals, aerating and remediating. According to the method for repairing polluted soil and underground water through in-situ aeration, a traditional aeration well is replaced with the plastic drainage plate, the plastic drainage plate has good strength and ductility, circulation of air in a claylayer or a silty soil layer can be improved, the method is suitable for soil layers with different properties, and the treatment range is wider. Aerobic microorganisms are used for degrading pollutants in soil and underground water, oxygen is provided for the microorganisms through aeration, the degradation rate of the microorganisms is increased, and the remediation effect is improved. By adopting the remediation technology, damage to the original soil structure is avoided, secondary pollution is avoided, and the cost is low.

The invention relates to a static pressure pile sinking device capable of adopting an interior through method, and an interior through static pressure pile sinking method. The device comprises a prestressed pipe pile, a stand column frame, a hollow drill pipe and a drill arranged on the end part of the drill pipe, wherein an inner guide pipe is arranged in the inner cavity of a first section of pipe pile and is connected with the pipe pile through a bolt. When a thick silty clay layer or a clay layer is arranged from the ground to a sand layer, the inner guide pipe is arranged in the pipe pileso as to avoid a situation that silty clay or clay enters the hollow cavity of the pipe pile to block the inner wall hollow cavity of the pipe pile. The interior through method effectively breaks a mechanical self-locking phenomenon in the sand layer, hole drilling and guiding and static pressure pile sinking are synchronously carried out in a whole process, and in addition, two types of construction equipment are connected into a whole without separation. During hole drilling and guiding, movement is not required, in addition, hole guiding is carried out in the hollow cavity of the prestressed pipe pile, a soil layer around a pile body is free from disturbance during hole guiding, and therefore, a constructed pipe pile and the bearing capacity of the constructed pipe pile around the pilecan not be affected until the pile end of the prestressed pipe pile penetrates through the tight sand layer to achieve a designed elevation and pile length.

The invention provides a new method for establishing the liquefaction field pile covered with a clay bed-soil dynamic interaction load-displacement to overcome the defect that the soil reaction force solving precision is poor in the process of establishing the dynamic load-displacement, effectively obtain the relativity displacement y of pile soil and ensure the correctness of the liquefaction field pile covered with the clay bed-soil dynamic interaction load-displacement. The new method for establishing the liquefaction field pile covered with the clay bed-soil dynamic interaction load-displacement relates to the technological approach for solving the pile-soil dynamic interaction load-displacement in the field of geotechnical engineering and mainly relates to the five parts of content of the dynamic load-displacement establishing basic theory, the soil layer boundary pile bending moment interpolating function processing method, the pile-soil dynamic interaction force calculating, the pile lateral dynamic displacement solving and the pile soil relative dynamic displacement determining.

The invention relates to the technical field of landfill facilities, and particularly relates to a landfill reservoir area anti-seepage system capable of protecting a geomembrane and a construction method thereof. The landfill reservoir area anti-seepage system comprises a reservoir bottom anti-seepage system and a side slope anti-seepage system; the reservoir bottom anti-seepage system comprises a compacted clay layer, a bentonite waterproof blanket, at least one layer of geomembrane, a rubble layer and a woven geotechnical filter screen which are vertically arranged from bottom to top; the side slope anti-seepage system comprises a compacted clay layer, a bentonite waterproof blanket, at least one layer of geomembrane, a rubble layer and a woven geotechnical filter screen which are obliquely arranged from bottom to top; and geotechnical cloth is laid on the upper layer of the geomembrane, and a high-tensile filter and discharge plate is laid on the upper layer of the geotechnical cloth. The landfill reservoir area anti-seepage system is simple in structure and convenient to construct, compared with a traditional landfill anti-seepage system, resources are saved, the reservoir capacity is increased, meanwhile, the geomembrane in the anti-seepage system can be effectively prevented from being damaged, and the service life is prolonged.

The invention discloses a test instrument and method for testing gas diffusion coefficients of a horizontal barrier system of a geomembrane, a bentonite waterproof pad and a compacted clay layer underdifferent contact conditions. The instrument consists of a pressurizing part, a permeable stone, a soil sample, a porous breathable material, an air inlet, an air outlet, a valve, an air storage chamber, a geomembrane or geosynthetic liner and an oxygen sensor. According to the invention, loads with different sizes and different types of concentration conditions can be autonomously and conveniently applied to the GM/GCL and the upper end of the soil body or the size of a gap between the soil and the geomembrane is changed, thus the different contact degrees of the two can be changed. On the other hand, by calculating the gas diffusion coefficient of the sample structure, the gas diffusion coefficient indirectly corresponds to the contact mode between the GM/GCL and the soil body one to one, and therefore quantitative calculation and research are conducted on the contact mode of the GM/GCL and the soil body.

The invention discloses a pipe shed construction method for a weak surrounding rock section of a tunnel portal. The method comprises the steps of 1, construction preparation; 2, surveying and settingout; 3, guide wall construction; 4, tunnel face and side and heading slope surface sealing; 5, drilling machine in-place; 6, drilling; 7, drilling tool withdrawing; 8, grouting; and 9, hole sealing. Pipe shed construction precision is ensured by adopting a guide technology, a drilling process provides reference for tunnel excavation according to geological records, and effective advance support provides technical guarantee for tunnel excavation. The pipe shed construction method is accurate in drilling process, free of hole deviation and hole collapse phenomena, high in hole forming efficiency, and suitable for environments such as sand layers and clay layers with complex geological conditions and loose soil texture, and the achieved effect is quite remarkable.

The invention discloses a high earth and rockfill dam anti-seepage earth material blending construction method which comprises the following steps: determining the position of a stock ground, sampling, detecting soil layer parameters, determining a clay layer and a gravel soil layer, layering the gravel soil layer of the stock ground again, determining the average parameter of each gravel soil layer after layering of the stock ground again, and calculating the blending ratio value and the water adding amount. Performing layered blending in a blending field according to a calculation result, adding water to adjust the P5 content and the water content, detecting the prepared soil material, and if the detection is qualified, performing high earth and rockfill dam filling; if the detection result is not qualified, blending again; according to the method, investigation and soil property analysis are carried out on a soil layer at the position of a damming material field, a soil material blending field is arranged in a damming area according to the distribution nonuniformity and the water content deviation of soil materials, and blending of anti-seepage soil materials is completed by utilizing the soil materials in different layers on site, so that the anti-seepage effect of the anti-seepage soil materials is improved. The quality meets the design requirement, the requirement of dam high-strength filling construction can be met in the aspect of productivity, the transportation cost is reduced, and the construction efficiency is improved.

The invention discloses a gravity-type high-pressure water jet impact device and a sinking-assisting method thereof, which belong to the field of sinking-aiding in bridge caisson foundation sinking construction. A water pipe is provided at the end of the bracket, a lifting point is provided at the end of the bracket, a booster pump connection is provided at the water inlet of each water pipe at the end of the bracket, and a reducing head is provided at the water outlet of each water pipe at the front end of the bracket. The sinking method is to use the suspension point of the tower crane suspension bracket, and the booster pump is connected to the booster pump connection port of each water pipe. When the bracket sinks vertically, the multiple high-pressure water jets of the variable diameter heads of each water pipe act on a sinking commanding height at the same time. Disperse compaction clay. The invention overcomes the disadvantages of poor convenience and poor sinking effect of the traditional sinking aid measures in the silty clay layer, specifically solves the commanding heights of the soil layer, has high sinking efficiency, takes less time and costs less.

The invention discloses a bionic cave for protecting beavers. The bionic cave is constructed in shore river water and comprises an ellipsoidal crown-shaped concrete base, the surface of the ellipsoidal crown-shaped concrete base is covered with a polyurethane heat preservation and insulation layer and a clay layer, the ellipsoidal crown-shaped concrete base is provided with an inlet and two escapeways, the inlet and the two escape ways are immersed in the river water, a bionic bed is built on the clay layer of the ellipsoidal crown-shaped concrete base, a polyurethane heat preservation and insulation layer and a clay layer are sequentially arranged on the inner side of the hole top reinforced concrete shell structure, dead wood branches for hiding a hole are arranged on the outer surfaceof the hole top reinforced concrete shell structure, a ventilation opening is formed in the center of the top of the hole top reinforced concrete shell structure, three lighting channels are evenly distributed on the periphery, and lighting glass is arranged on the lighting channels. The bionic cave for the beavers is simple in type, capable of creating a beaver habitat, long in service life, highin safety coefficient, beneficial to increase of the beaver livelihood industry and the population number and beneficial to national first-level animal beaver protection.

The invention discloses an earth pressure type spiral unearthing pipe jacking machine and a spiral unearthing method. The spiral unearthing pipe jacking machine comprises a driving part and an excavating part connected with the driving part, wherein the excavating part comprises an excavating sleeve connected with the driving part and a spiral unearthing shaft arranged in the excavating sleeve; and the spiral unearthing shaft is hollow, and spiral blades are arranged on the surface of the spiral unearthing shaft. The spiral unearthing shaft is used as a water and mixed material conveying pipeline, a certain proportion of soil improvement mixed materials are injected into a soil excavating site to change the flow plasticity of soil, so that a soil mixture filled in a soil bin is kept in a balanced state with the front soil pressure of an excavation tunnel face and the pressure of underground water, the problems that stratum soil mass is excessively disturbed in the pipe jacking construction process and ground subsidence is caused after pipeline construction are solved, soil is discharged in a spiral soil discharging shaft mode, and the earth pressure type spiral unearthing pipe jacking machine is suitable for a wide range of construction soils and is suitable for construction of a clay layer, a hard soil layer, a sand soil layer, a pebble bed and a moderately-weathered rock stratum.

The invention relates to a construction device and a construction method for a tube pile in a dense sand stratum. The construction device for the tube pile in the dense sand stratum comprises a firstclay layer, a sand soil layer and a second clay layer, wherein a construction platform is arranged above the first clay layer; a static pile press machine is arranged at the upper end of the construction platform and is linked with the tube pile; a water tank is placed at the upper end of the first clay layer; a water pump is fixedly connected to the outer side of the water tank and communicates with a water delivery pipe; and a water jet pipe communicates to one end, far away from the water tank, of the water delivery pipe. According to the construction device and the construction method forthe tube pile in the dense sand stratum provided by the invention, during construction, the tube pile and the static pile press machine are fixed, the static pile press machine is started, and when the static pile press machine is linked with the tube pile and the lower end of the tube pile is located at the upper end of the sand soil layer, the water jet pipe is placed in a cavity of the tube pile, the water pump is started so as to be linked with the water delivery pipe, the water jet pipe starts to spray water in the sand soil layer, the sand soil layer can be liquefied after the water content in the sand soil layer is increased, and the resistance during pile sinking can be reduced and even disappeared, so that the tube pile can be ensured to be smoothly sunk in the sand soil layer.

The invention discloses an environment-friendly dry powder foaming agent for shield construction and a preparation method thereof. The environment-friendly dry powder foaming agent comprises a foaming agent, a thickening agent and a foam stabilizer, wherein the foaming agent is lauryl sodium sulfate and lauryl alcohol polyoxyethylene ether sodium sulfate, the thickening agent is prepared from polyoxyethylene and guar gum according to a ratio, and the foam stabilizer is dodecanol and sodium carboxymethyl cellulose. According to the invention, the dry powder is suitable for improvement of clay layer, sand layer and round gravel layer geological earth pressure balance shield construction muck; the stability under the shearing action is improved on the basis that an existing foaming agent has high foaming times and half-life period, so that the cohesiveness and flow plasticity of muck are remarkably improved, the pressure at a cutterhead soil bin is maintained to be constant, and the stability of an excavation surface is ensured so as to improve the shield excavation efficiency.

The invention relates to the field of sewage pipe treatment, and particularly relates to a method for preventing a sewage pipeline from scaling. The method comprises the steps that the sewage pipe istransversely placed on a gravel layer, the gravel layer is positioned on the upper portion of a clay layer, a sewage collecting part is arranged at one end of the sewage pipe, a flushing part is arranged at the other end of the sewage pipe, and the sewage collecting part is connected with the flushing part; before the sewage pipeline needs to be flushed, an electromagnetic valve is opened firstly,sewage flowing through the sewage pipe is introduced into a filter tank, then filtered water enters a water storage tank through a water conveying channel, and a water source in the water storage tank serves as a water source for flushing the pipeline. The structure is simple, the anti-scaling effect of the sewage pipeline is good, the water resource can be recycled in the flushing process, dirtand impurities of the pipeline are thoroughly flushed in the flushing process, all the components act synergistically, the flushing steps are closely linked, and the pipeline can be quickly flushed.