41results about How to "Improve the nature of the project" patented technology

The invention relates to a construction method of composite foundation with a bagged compacting and slurry cementing small-diameter gravel pile for treating a small-area soft deep mollisol layer. The method is characterized in that a small-diameter soil engineering pipe bag is combined with a traditional gravel pile treatment method, and the compacting effect of the gravel pile and the restraint effect of the soil engineering pipe bag are utilized to form a high-density micro pile group effect so as to improve the bearing capacity of the foundation. The method has the advantages that the bagged compacting and slurry cementing small-diameter gravel pile can obviously improve the engineering properties of shallow foundation soil, effectively improve the strength of the foundation soil, decrease the settlement after work and is an effective method for treating a small-site mollisol foundation. Due to the limit restraint effect and the packaging effect of the soil engineering pipe bag, the dosage of gravels is greatly reduced, and the slurry cementing effect of cement slurry guarantees the pile body strength. Compared with a gravel pile method of a large-area mollisol foundation, the method has the characteristics of simple process, quick construction, miniaturization of construction equipment, material saving and low manufacture cost and can be generalized and applied to treatment engineering of the small-site deep mollisol foundation.

The invention relates to an integrated treatment method for dewatering and solidifying clear slurry, which comprises the following steps: conveying slurry in river, sea and lake ponds to a settling pond through a dredging pump, a slurry pump and a pipeline and flowing into a slurry storage pond after the slurry is filtered by a combined grid device; conveying the slurry with 80 percent of moisture content in the slurry storage pond to a slurry compounding pond by using the pump, adding inorganic macromolecule conditioning agents of 0.01 kilogram (35 percent of polymeric ferric silicate sulfate PFSS plus 65 percent of poly aluminum chloride PAC) in the slurry per cube to condition and then adding FSA flocculating-settling agents of 0.05 kilograms in the slurry per cub to condition again; adding HEC high-strength high-water resistant soil body consolidating agents of 5-20 kilograms in the slurry per cube and uniformly mixing; pressing the slurry after being treated in above steps into slurry consolidating soil by using a filter press, discharging clear water and obtaining a mud cake with 30 percent or below moisture content as engineering soil. The slurry has a certain self-hardening capacity after being dewatered and solidified, the formed consolidated soil has the air permeability and the bearing capacity, and the PH value thereof is equivalent to that of common soil, so that the rationalization, the resource, innocuous disposal and the economic treatment of the slurry are really realized.

The invention discloses a method for silt soil with ectopic activated magnesium oxide carbonization and solidification, and belongs to the field of hydraulic and civil engineering. The method includesthe steps of a sludge pretreatment, a uniform mixing of a curing agent, a silt granulation, a carbon dioxide carbonization, a waste gas/waste liquid collection, and a resource utilization. The supplyof the curing agent is regulated by actual measure a water content rate, and a diameter of a grain and a carbon dioxide pressure are regulated according to a soil property, so that a full mixing of the silt and the curing agent and the rapid carbonization of magnesium oxide solidified the sludge grains are realized. Dust and carbon dioxide are absorbed during the operation process to avoid secondary pollution. The method is safe, simple, low in carbon, environmental, and high in continuous operation rate, and the problem of sludge treatment and engineering application is solved. The silt carbonized grains have the advantages of low moisture content, high hardness, high shear strength, large friction coefficient and the like. The silt carbonized grains can be used as a filler such as a roadbed, an airport runway and an engineering backfill, and the reclamation of the slit/sludge and the carbon dioxide is realized. The method for the silt soil with the ectopic activated magnesium oxidecarbonization and solidification has great significance of the engineering construction.

The invention discloses a bottom-grouting-enlarged small-diameter prestressed tubular pile composite foundation construction method for processing a small-area/narrow-range deep mucky soil or soft clay foundation, which is characterized in that: by utilizing the high bearing capacity and pile-bottom concrete reinforced and enlarged ends of bottom-grouting-enlarged small-diameter prestressed tubular piles, the bottom-grouting-enlarged small-diameter prestressed tubular piles effectively reduce diameters of pile bodies of the conventional prestressed tubular piles, reduce the buried depths of the pile bodies, and are arranged in a plane at a proper pile spacing to achieve micro shallow and dense pile group effect and achieve shallow soft field soil composite foundation reinforcement effect. The method has the advantages that: on bottom-grouting-enlarged small-diameter prestressed tubular pile composite foundation, the small-diameter prestressed tubular piles are used to compact the surrounding soil to transfer load, and grouting and reinforcement of pile bottoms are performed to improve the end bearing capacity, so that a shallow pile-based composite foundation is formed. Compared with a normal large-area soft soil foundation composite foundation processing method and a prestressed tubular pile foundation method, the method has the characteristics of simple process, high construction speed, miniature construction equipment, material saving and low cost.

The invention aims to solve the problems in the prior art that the river slit is usually dredged by the cutter-suction process, which results in that the initial water content of the soil body is extremely high and generally 2 to 10 times the liquid limit; in the commonly-used solidification process, only quicklime and cement are added to the silt, which results in that the strength of the solidified soil can not meet the design requirements or the addition amount is very large and the manufacturing cost is high. In order to solve the problems, the invention provides a composite additive which is the mixture of dredged silt with high water content, cement, quicklime and sodium polyacrylate. The composite additive can achieve the purpose of rapid solidification of the dredged silt with high water content, and can greatly improve the strength of the soil body. The composite additive comprises the following ingredients in percentage of the total weight of the solidified silt: 3 to 7 percent of cement, 7 to 15 percent of quicklime and 0.05 to 0.1 percent of sodium polyacrylate.

The invention is a palmityl trimethyl ammonium bromide expansive soil modifier, characterized in comprising the preparing steps of: (1) at room temperature, preparing saturated lime water solution; (2) weighing the needed palmityl trimethyl ammonium bromide in the mass ratio of palmityl trimethyl ammonium bromide to dry soil = 0.5 : 99.5; (3) dissolving the palmityl trimethyl ammonium bromide in the saturated lime water solution, where it needs to notice that the dosage of the saturated lime water solution is able to completely dissolve the palmityl trimethyl ammonium bromide. And the advantages: making the soil property still able to reach the specified standard under the water influence; improving engineering property of expansive soil; unable to cause environmental pollution. And its construction method uses osmotic modification principle and fully uses multi-crack property of expansive soil and is simple and convenient.

The invention relates to a construction method of a bagged rammed small-diameter soil-cement pile composite foundation in a small-area weak and deep soft soil layer. The construction method is characterized in that a small-diameter soil engineering pipe bag is combined with the traditional soil-cement pile processing method to extrude surrounding soil bodies to be dense in a limiting way by utilizing the gluing reinforcement of cement and the restraint action of the soil engineering pipe bag so as to form high-density minitype pile group effect and enhance the bearing capability of the foundation. The diameter of the traditional soil-cement pile and the loss of soil-cement in the foundation are reduced by utilizing the packaging and restricting action of the soil engineering pipe bag, and the embedment depth of a pile body is reduced, thereby the reinforcement effect of a shallow-layer weak field soil composite foundation is achieved. Compared with construction method of the soil-cement pile large-area soft soil foundation, the invention has the advantages of simple process, fast construction, miniaturized construction equipment, material saving and low cost and can be popularized and used in the processing process of a small-area deep and weak field soil foundation.

The invention discloses a collapsible loess wellpoint presoaking dynamic compaction replacement method, and belongs to a deep collapsible loess foundation treatment method. The method comprises the steps that firstly, the treatment range and the treatment depth of a foundation are determined; secondly, within the foundation treatment range, a cushion material is laid on the whole surface; thirdly, according to the foundation treatment depth, a wellpoint hole is drilled out, a presoaking wellpoint pipe is vertically arranged in the wellpoint hole according to presoaking parameters, and water-pervious holes are evenly distributed in the wall of the pipe stretching into the foundation; fourthly, the presoaking wellpoint pipe is connected with a water injection pipe, and the foundation is subject to presoaking treatment; fifthly, the foundation is subject to dynamic compaction replacement treatment; and sixthly, the foundation quality is tested and is subject to acceptance check. The method is easy and convenient to construct, large in treatment depth, short in construction period and capable of effectively removing collapsibility of the deep collapsible loess foundation, and the bearing force of the foundation obtained after treatment is high.

The invention relates to a subgrade filling material produced from building construction waste and river sand and a preparation method of the subgrade filling material. The subgrade filling material is made by mixing 60% of building construction waste and 40% river sand. The building construction waste mainly comprises waste concrete soil blocks and waste brick fragments and is taken as crude aggregate, which plays the function of a skeleton. The river sand has a loose non-viscous single-particle structure and is taken as fine aggregate, which is used for filling pores in the crude aggregate. The specific gravity of particles of building construction waste should be larger than that of particles of river sand. Compared with river sand, the subgrade filling material has obviously improved mechanical properties, the shear strength of the subgrade filling material is increased, the compacting performance of the subgrade filling material is improved, and the bearing capability of the subgrade filling material is improved. Compared with river sand, the subgrade filling material has obviously improved anti-liquefaction performance, and is free of risk of liquefaction. The mixture of river sand and building construction waste can be applied to subgrade backfill engineering. The subgrade filling material is simple in construction process, allows cyclic utilization of building construction waste to be promoted, and has less dependence on river sand resources. The subgrade filling material has great, economic, eco-friendly and social benefit.

The invention discloses a carbonization repair method of volatile organic compound-heavy metal compound polluted soil, and belongs to the field of polluted soil repair. The method comprises the stepsof compound polluted soil pretreatment, organic pollutant separation and extraction, curing agent mixing, granulation of polluted soil uniform mixtures, carbonization of polluted soil uniform mixed granules, storage and maintenance of carbonized polluted soil particles, waste liquid/waste gas collection, waste heat utilization and resource utilization. The heating time, the curing agent mixing quantity and the carbonization time are adjusted by actually measuring the organic matter components and concentrations of the compound polluted soil, heavy metal components and contents, temperature andthe water content, and therefore the optimal work efficiency is achieved. In the working process, volatile organic pollutants are extracted, and dust, waste gas and carbonized heavy metal are absorbed. The method is safe, rapid, low-carbon, environment-friendly and high in continuous working rate, produced carbonized polluted soil particles are high in hardness and strength and low in leaching efficiency and can be used as roadbeds, airfield runways, engineering backfill and the like, and great engineering construction significance is achieved.

The invention discloses a geotechnical engineering waste slurry efficient solidifying agent, which is prepared from the following ingredients in percentage by weight: 55 to 80 percent of geopolymers, 13 to 40 percent of alkali activators, 0.8 to 4.5 percent of high-bonding water materials, 0.3 to 2.6 percent of super water-absorbable polymers and 0.05 to 1.12 percent of cross-linking agents. In addition, the preferable percentage of the ingredients is shown as follows: 72 percent of geopolymers, 26 percent of alkali activators, 1.5 percent of high-bonding water materials, 0.4 percent of super water-absorbable polymers and 0.1 percent of cross-linking agents. The geotechnical engineering waste slurry efficient solidifying agent has the advantages that the solidification effect of geotechnical engineering waste slurry is greatly improved; the cement consumption is reduced; the cost is reduced; the environment pollution is reduced; the cyclic utilization of waste materials is promoted; good economic benefits and social benefits are realized.

The invention provides a mud flat soft soil strengthening agent and a preparation method thereof, and belongs to the field of soft soil treatment. The mud flat soft soil strengthening agent is prepared from a main curing agent and an auxiliary curing agent which are used cooperatively; the main curing agent is prepared from the components in parts by weight: 40 to 60 parts of geopolymer slurry, 5to 10 parts of coal ash particles, 1 to 3 parts of polyvinyl alcohol, 2 to 4 parts of ethyl cellulose, 8 to 12 parts of modified ligninsulfonate and 4 to 7 parts of a cross-linking agent; the auxiliary curing agent is prepared from the components in parts by weight: 12 to 18 parts of epoxy olefin, 4 to 6 parts of diethylenetriamine, 7 to 9 parts of styrene-butadiene block copolymer and 7 to 10 parts of potassium sodium tartrate. The mud flat soft soil strengthening agent has extremely high strengthening performance on high water-content mud flat soft soil; the mud flat soft soil which is curedthrough the strengthening agent is high in strength, high in water stability, high in compressive strength and high in durability.

The invention discloses a microbial treatment method for a peat soil foundation low in decomposition degree. The microbial treatment method comprises the steps that 1, a microbial growth promoting solution is prepared; 2, a feeding pipe and a material sucking pipe are vertically arranged in target foundation soil; 3, the feeding pipe is filled with the microbial growth promoting solution, a mixture of the microbial growth promoting solution and other filtrates is sucked out of the material sucking pipe and then is recharged into the feeding pipe, and circulation of the microbial growth promoting solution is achieved; 4, after target foundation treatment is completed, the material sucking pipe is utilized to directly suck out the mixture of the microbial growth promoting solution and otherfiltrates, and discharging is performed after treatment. The method integrates biological science and geotechnical engineering, utilizes microbes to reduce the content of organic matter in the soil and accordingly improves the engineering properties of the foundation soil. Construction is simple and easy, no noise nor vibration is produced, the technical treatment cost is low, and a new means is provided for treatment of peat soil foundations low in decomposition degree.

The invention belongs to the technical field of slope protection, and discloses a waterproof protection slope. The waterproof protection slope comprises an expansive soil slope, a slope top protection table, a slope toe protection table, a polymer waterproof layer, an ecological protection layer and a water guide channel. A solidification layer is formed on the surface layer of the expansive soil slope through a soil solidification agent; the slope top protection table is arranged on the slope top of the expansive soil slope; a slope top intercepting ditch is formed in the slope top protection table; the slope toe protection table is arranged on the slope toe of the expansive soil slope; a slope toe drainage ditch is formed in the slope toe protection table; the polymer waterproof layer is formed by combining one or more of waterproof coatings or cast-in-place coiled material waterproof layers; the polymer waterproof layer is laid on the surface of the solidification layer; the ecological protection layer is laid on the surface of the polymer waterproof layer; the water guide channel is formed in the ecological protection layer; and water in the slope top intercepting ditch can be guided to the slope toe drainage ditch. According to the waterproof protection slope, the polymer waterproof layer can reliably protect the expansive soil slope, and stress generated by expansive soil slope deformation can be buffered and released.

According to an SFC cementitious block and a manufacturing method thereof provided by the invention, carbon dioxide caused by traditional baking bricks can be effectively reduced, three industrial byproducts such as F-grade fly ash, furnace stone powder and CFBC ash are recycled, and a large amount of hoarding problem is improved. The SFC cementitious block mainly comprises the following components: furnace stone powder, F-grade fly ash and CFBC ash.

Described are polymer compositions that include a blend of recycled poly(ethylene terephthalate) (rPET) and a copolyester based on monomers that include on terephthalic acid (TPA), ethylene glycol (EG) and 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD), wherein the blend has improved engineering properties compared to the rPET material.