31 results about "Natural stress" patented technology

The invention discloses a shear test device and a shear test method in an in-situ soil body pore. The test device is lowered to a test point by utilizing a drilling machine to bore, normal stress is provided by applying air pressure to facilitate the expansion of an airbag so as to drive a shear barrel to be expanded, a shear cutter on the periphery of the shear barrel can be inserted into a soil body so as to solidify the soil body, a steel rod is driven by applying hydraulic pressure through a gear to lift so as to drive the shear cutter to cut the soil body, the soil body is cut and destructed, and finally a shear index of the soil body can be calculated according to a coulombs law. The test method comprises the steps of boring, assembling the test device, lowering the device, solidifying, cutting and processing data. The invention also provides a shear test device in the in-situ soil body pore. According to the technical scheme, the strength index of the soil body can be determined under a natural stress state. The shear test device and the shear test method have advantages of low price, simplicity in operation, short test time and strong applicability.

The invention discloses a bridge pier VSR (vibration stress relief) method for a steel structural bridge and relates to the technical field of stress relief treatment of steel structure parts. A bridge pier of the steel structural bridge is a high-rigidity and heavy large structural part, and stress relief treatment is difficult to perform with existing thermal stress relief, natural stress relief, ultrasonic impact stress relief and VSR methods. According to the method, the bridge pier is supported by a support pad, multiple sets of VSR equipment are used, multiple vibration exciters are adjacently fixed on a lower frame beam of the bridge pier, multiple vibration testers are adjacently fixed on an upper frame beam of the bridge pier, then, multiple vibration exciters are controlled by use of multiple controllers, co-frequency sub-resonance vibration is performed on multiple resonance peaks of the bridge pier for several hours, the purpose of effectively relieving the residual stressis achieved, the average relief rate of the residual stress reaches 43%, the problem of difficulty in relieving the residual stress of the bridge pier is solved, and the method can be applied to steelstructural bridges.

The invention relates to the technical field of food additives, in particular to a modifier for glutinous rice products. The modifier comprises the following components in percentage by weight: 65 to 75 percent of trehalose, 5 to 10 percent of sucrose ester, 10 to 20 percent of glycerol monostearate, 5 to 10 percent of konjac flour and 1 to 10 percent of polyphosphate double salt. The modifier ischaracterized in that: through reasonable compatibility of a natural emulsifying agent, a natural stress-resistant preservative and functional components, which are synergic, the glutinous rice products have appropriate mouthfeel and flavor, stable quality, and the shelf life of six months or above; the problem that the glutinous rice products are difficult to digest is solved; and the products have certain health-care function.

The invention discloses an assembled and detachable type in-situ test device for seepage of a fractured rock mass. The assembled and detachable type in-situ test device consists of a first fixed sealing device, a second fixed sealing device and a control system, wherein the first fixed sealing device and the second fixed sealing device are respectively and fixedly arranged in the rock mass, are respectively connected with the control system, and are respectively communicated with a fracture. The assembled and detachable type in-situ test device has the advantages that by performing the seepage test on the given fracture in the rock mass under different pressure conditions, the control system, the first fixed sealing device, the second fixed sealing device and the fracture form a closed loop, so as to automatically collect and store data; the structure is simple, and the assembly and detachment are convenient; the whole device is positioned in the original geological environment of the fractured rock mass, the natural structure and natural stress state of the fractured rock mass are maintained, and the hydraulic conduction coefficient of the fracture seepage is accurately obtained.

The invention discloses a breeding method of green super-rice. The method comprises the following steps: (1) taking rice parents for hybridization, to obtain an F1 generation; (2) performing selfing and back-crossing to the F1 generation to obtain a F2 generation and a BC1F1 generation; (3) placing the F2 generation or the BC1F1 generation in a natural stress environment for breeding, and screening according to target characters to obtain target single plant; (4) repeating the steps (2) and (3) until the single plant with stable characters is obtained. According to the method, the conventional breeding method and a multi-factor natural stress environment are combined, rice is not subjected to stress screening of water irrigation, fertilizer application and pesticide spraying environments after being transplanted, high-yield, drought-resistant, low fertilizer-resistant (efficient utilization of the fertilizer) and disease and pest-resistant green super-rice can be obtained through matching the screening of target characters; and the rice material obtained by adopting the breeding method has the characteristics of being high-yield, drought-resistant, low fertilizer-resistant (efficient utilization of the fertilizer) and disease and pest-resistant, and the hereditary character is stable.