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

An electrokinetic method for groundwater protection, soil remediation and engineering which comprises applying an electric field across an area of soil, sediment or slurry so as to generate a pH and Eh gradient and thereby promote the in situ precipitation of a stable iron-rich band. The method may be performed for the purpose of stabilisation and / or strategic dewatering / rewatering of soils, sediment and / or slurries, the improvement of the physical properties of soils and sediments for engineering purposes, the forced and directed migration of contaminated leachates, and / or electro-osmotic purging of non-polar contaminants.

The invention discloses a method for improving peat soil foundation by microbial technology, which includes: leveling the site, and then laying more than one pumping well and more than one water injection well in the peat soil foundation to be treated, and the more than one pumping well surrounds Arrange more than one water injection well; use PVC pipes to connect the pumping well and water injection well to form an independent pumping system and water injection system; inject the prepared amplified bacteria solution from the water injection system until a certain concentration of amplification is detected from the pumping system The bacterial liquid is extracted; the injection of the amplified bacterial liquid is stopped, and it is left to stand in the peat soil foundation for more than 24 hours; oxygen-containing pure water or other nutrient solutions are injected through the water injection well; soil samples are taken regularly to detect the number of bacteria in the soil; the present invention Combining biotechnology with geotechnical engineering, using microorganisms to degrade the organic matter in the soil, reducing the organic matter content, thereby improving the engineering properties of the foundation soil, this application provides a green, efficient, convenient and low-cost peat soil foundation treatment method .

The invention relates to a method for improving the mechanical properties of microbial cemented sandy soil by using protein gelling materials, and belongs to the interdisciplinary technical field of geotechnical (geological) engineering and microorganisms. The cementing liquid of the present invention contains protein gelling material, urea and calcium chloride. In the process of cementation and solidification, the carbonate radical produced by bacterial hydrolysis of urea and the calcium ion produced by ionization of calcium chloride form calcium carbonate precipitation, and the protein gelling material passes through The chemical bonds form an effective connection between the carbonate and the sand particles, so as to achieve the purpose of cementing the sand, and the protein cementitious material is evenly distributed between the sand particles, providing more nucleation sites for calcium carbonate precipitation point, which is beneficial to the precipitation of calcium carbonate. At the same time, the viscosity and chain-like structural characteristics of protein gelling materials improve the interface mechanics between sand particles and calcium carbonate, and improve the toughness of microbial cemented sand.

The invention discloses a gravity retaining wall and a construction method thereof. The gravity retaining wall is arranged in a sludge foundation pit. The foundation pit comprises a side face and a bottom surface. The gravity retaining wall comprises a plurality of oblique piles and a plurality of vertical piles. The multiple oblique piles incline towards the side face from the ground surface on the outer side of the foundation pit and are in mutual engagement and lap joint to form an oblique water interception curtain. The multiple vertical piles are arranged on the side face and are in mutual engagement and lap joint to form a vertical water interception curtain. A surrounding area with a triangular cross section is formed after the vertical water interception curtain and the oblique water interception curtain are combined. A gravity unit is formed after drainage consolidation is conducted on sludge in the surrounding area. According to the gravity retaining wall and the construction method thereof, local materials are used, a supported soil body which is prone to collapse is used as a supporting structure gravity unit after the supported soil body is subjected to engineering improvement, the supporting effect is improved remarkably, the working safety in the foundation pit is improved, the construction method is simple and easy to operate, and the applicability is high; and compared with a traditional foundation pit supporting technique, the safety performance is higher, and the economic applicability is higher.

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, andthe 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 popularizedand used in the processing process of a small-area deep and weak field soil foundation.