92results about How to "Achieve long-term stability" patented technology

The invention discloses an ecological restoration and purification method for landscape water environment which is characterized by comprising the following steps of (1) performing bottom mud sterilization and activation treatment; (2) splashing a microbial flora compound preparation; (3) reconstructing a submerged communities; (4) repairing an aquatic ecosystem food chain; and (5) performing aquatic ecosystem conservation management. According to the ecological restoration and purification method for the landscape water environment, a biological integrated control technology is applied, and the water purification effect is achieved by use of submerged plants; furthermore, decomposers, namely microorganisms in an ecosystem are fully utilized, and multiple types of aquatic animals are put in the aquatic ecosystem, so that the ecosystem food chain is perfected, various aquatic species promote and restrict one another, the whole riverway, lake, pond and wetland system is kept in dynamic balance for a long time, the original self-purification capability of the aquatic ecosystem is restored, and a long-term stable effect is achieved.

The invention relates to a stabilization and solidification method of highly toxic waste residues containing one or more of mercury, arsenic, chromium, cadmium and cyanide. Heavy metal is stabilized through chemicals, and then the highly toxic waste residues are sequentially wrapped with gypsum plus paraffin and epoxy resin. After four times of wrapping and two times of solidification, highly toxic substances in the waste residues are fully solidified into a solidified body, and the generated solidified body is high in strength and long in stability, and can be buried conveniently later.

The invention relates to an anchoring-grouting integrated reinforcing method for roadway floors. Aimed at the problems that the deep of the soft, fractured roadway floor in a geologically abnormal zone is hard to reinforce and floor heave is difficult to control, the anchoring-grouting integrated reinforcing method is adopted and comprises the following steps: severe grout runout or grout leakage is first prevented during grouting when the roadway floor is constructed, shallow hole grouting is then carried out to block shallow fractures and form a shallow grout-stopping layer, moreover, after grouting, the integrity of wall rocks within the grouting range is enhanced, and thereby the problem of subsequent grouting borehole collapse is solved; deep grouting holes are then constructed, grouting pipes and anchor ropes are mounted, full-length anchoring is carried out on the anchor ropes while grout is injected to solidify deep rocks, finally, channel steel, I-shaped steel and the like are adopted to combine single anchor ropes into anchor rope beams, and thereby the deformation of the roadway floor can be effectively controlled.

A phenolic foam is made by foaming and curing a foamable phenolic resin composition that comprises a phenolic resin, a blowing agent, an acid catalyst and an inorganic filler. The blowing agent comprises an aliphatic hydrocarbon containing from 1 to 8 carbon atoms and the inorganic filler is at least one selected from a metal hydroxide, a metal oxide, a metal carbonate and a metal powder. The phenolic foam has a pH of 5 or more. The phenolic foam has a higher pH value compared with conventional phenolic foam and reduces corrosion risk when in contact with metallic materials. The phenolic foam maintains excellent long-term stable thermal insulation performance, low water uptake and fire resistance performance and by using a hydrocarbon blowing agent, does not harm the environment as an ozone depleting or global warming material.

The invention discloses a pressure-relief support coordination control method for a deep high-stress tunnel based on borehole pressure relief. The method comprises three steps according to a time sequence, and the three steps are respectively a primary pressure relief support step, a borehole pressure relief step and a secondary high-strength anchor grouting support step. According to the pressure-relief support coordination control method for the deep high-stress tunnel based on borehole pressure relief, surrounding rock deformation in each stage is controlled by adopting different support and reinforcement methods according to difference of surrounding rock deformation ways in different stages after the tunnel is excavated, the support performances of surrounding rocks and supporting structures are fully played, and large deformation of the surrounding rocks of a deep high-stress tunnel is reduced, so the stability of the tunnel can be maintained for a long time. Meanwhile, the method disclosed by the invention is capable of effectively reducing the repair rate of the tunnel, alleviating the labor intensity of workers and lowering the comprehensive support cost of a mine.

The invention discloses an indoor three-dimensional grouting model test servo control system and a test method. The system comprises two parts of a three-dimensional grouting model test device and a constant-pressure grouting-water supply combined servo control device. The three-dimensional grouting model test device comprises three counterforce boards. A confining pressure counterforce cavity is placed between the first counterforce board and the second counterforce board. An axial pressure servo loading module for applying the axial loading force to the confining pressure counterforce cavity is placed between the second counterforce board and the third counterforce board. A pore water pressure loading module is arranged at the bottom of the confining pressure counterforce cavity. A grouted rock mass loading module and a confining pressure servo loading module applying confining pressure to the confining pressure counterforce cavity are arranged in the confining pressure counterforce cavity. The constant-pressure grouting-water supply combined servo control device comprises a constant-pressure double-liquid grouting pneumatic servo control module and a constant-pressure water supply pneumatic servo control module. The constant-pressure double-liquid grouting pneumatic servo control module is communicated with the confining pressure counterforce cavity. The constant-pressure water supply pneumatic servo control module is connected with the pore water pressure loading module.

The invention relates to a CNC pressurizing system for a model test and a control method thereof. The CNC pressurizing system for the model test comprises a partial pressure control part, a pressurization performing part and a visible human-computer interaction interface part, wherein the partial pressure control part comprises a pressure detection unit, a central control unit and a control output unit; the pressurization performing part comprises various control valves and various pressurization jack; the visible human-computer interaction interface part comprises a loading software system and an industrial computer system; a digital pressurization control part inputs a pressurizing command via the visible human-computer interaction interface; the partial pressure control part processes and converts obtained pressure information to generate an electric signal and inputs the electric signal to the pressurization performing part so as to carry out load output; and meanwhile, a partial pressure control system dynamically monitors the output load and feeds the output load to a visible human-computer interaction interface system for real-time display, storage and adjustment. The CNC pressurizing system for the model test and the control method thereof can realize digitization, visualization and intelligence of model loading in underground engineering model tests in the fields of hydroelectric power, transportation, energy source, resources and defense construction.

The invention discloses water-based drilling fluid. The water-based drilling fluid is prepared from clear water, inhibitor, filtrate reducer, blocking agent, pH regulator and heavy loader according to the weight ratio of 100:(20-25):(15-20):(1-2):(0.5-1):(35-200). By the adoption of the water-based drilling fluid, environmental hazard of oil-based drilling fluid can be avoided, and efficient blocking, multi-phase lubrication, complex inhibition and weak gel property are realized. The water-based drilling fluid is suitable for drilling in a shale gas horizontal well of a long horizontal wellbore which has high hardness and fragility and is prone to collapse, and has high environment friendliness and economical efficiency.

The invention provides a vertebral body union internal fixation system which is used for performing internal fixation on a vertebral column. The vertebral body union internal fixation system comprises an artificial vertebral body main body, vertebral body fastening screws, a vertebral body connector, vertebral pedicle screws and a longitudinal connection rod. According to the vertebral body union internal fixation system, the artificial vertebral body main body, an adjacent upper vertebral body and an adjacent lower vertebral body are compactly fixed through the vertebral body fastening screws; fixation and support of vertebral column posterior are achieved through the vertebral pedicle screws and the longitudinal connection rod; and the artificial vertebral body main body and the longitudinal connection rod are compactly connected and fastened through the vertebral body connector. The vertebral body union internal fixation system is used for being inserted to replace resected or deleted parasitic vertebral body sections to enable the physiological height of the vertebral body to be recovered and rebuilt and forming synostosis between the adjacent upper vertebral body and the adjacent lower vertebral body in the future.

The invention relates to a self-stabilization artificial vertebral body which is used for being inserted to replace resected or deleted parasitic vertebral body sections. The self-stabilization artificial vertebral body comprises a vertebral body main body and vertebral body fixing screws. An integration surface of the vertebral body main body and a vertebral body is a microcellular structure which is beneficial to ingrowth of bone cells. In an operation, the vertebral body main body with the suitable height is installed into the position with a damaged parasitic vertebral body section taken out and the vertebral body main body is fixed with an adjacent upper main healthy vertebral body and an adjacent lower main healthy vertebral body through the vertebral body fixing screws by penetrating through vertebral body fixing screw holes. The self-stabilization artificial vertebral body has the advantages of being good in instance stability after the operation and good in synostosis to effectively resist to subsidence, enabling the height of the replaced vertebral body to be continuously kept and being free of incisure after the operation and simple and reliable in operation.

The invention discloses a method for improving the frozen stability of a highway subgrade in a seasonal frozen region. According to the method, double subgrade isolating layers (namely an upper isolating layer and a lower isolating layer) of the subgrade is adopted, wherein the lower isolating layer is used for isolating capillary water under the maximal highway frozen depth for many years and reducing ice gathering amount of a subgrade soil body to the utmost extent; meanwhile, the upper isolating layer is used for isolating pavement water seepage at the top of the subgrade and draining water horizontally; the upper isolating layer and the lower isolating layer act together to realize a long-term stability purpose of the subgrade. By the adoption of the double-isolating-layer technology, water stability and the frozen stability of the subgrade can be well effectively ensured, so that deficiencies in the design of highways in cold areas in China can be made up.

A phenolic foam is made by foaming and curing a formable phenolic resin composition that comprises a phenolic resin, a blowing agent, an acid catalyst and an inorganic filler. The blowing agent comprises a blend of chlorinated aliphatic hydrocarbon containing 2 to 5 carbon atoms and an aliphatic hydrocarbon containing from 3 to 6 carbon atoms mixed in a ratio of 60/40 to 95/5 parts by weight. The inorganic filler is at least one selected from a metal hydroxide, a metal oxide, a metal carbonate and metal powder. The phenolic foam has a pH of 5 or more and a water uptake less than 1 kg/m². A phenolic foam with a higher pH value compared with conventional phenolic foam reduces corrosion risk when in contact with metallic materials. The phenolic foam maintains excellent long-term stable thermal insulation performance, low water uptake and fire resistance performance and by using the said blowing agent, does not harm the environment as an ozone or global warming depleting material.

The invention relates to a cabin type anchor device made of a fiber reinforced composite material and a construction method. The cabin type anchor device comprises a structure anchor assembly, a binding sleeve and an expandable cabin; and the binding sleeve is internally provided with at least one rib, plate or stranded wire made of the fiber reinforced composite material. The cabin type anchor device made of the fiber reinforced composite material is adopted, through combination of the rib, plate or stranded wire made of the high-performance fiber reinforced composite material and the expandable cabin, the bearing force and the durability of a soil body anchor rod are greatly improved; and through the binding force transmission manner of combining the rib, plate or stranded wire made of the high-performance fiber reinforced composite material and the binding sleeve or a binding casing pipe, the technical problem that reliable anchoring of the high-performance fiber reinforced composite material is difficult to achieve due to the low transverse shearing strength is solved. By means of the new technology, the self carrying capacity of a soil body can be sufficiently transferred under the complicated geological condition, so that the bearing and antiseptic properties of rock-soil anti-lifting components are improved, and industrialized production and light-weight transportation and installation are facilitated.

The invention relates to a new technique for efficiently performing natural ecological treatment on sewage in villages and towns and manually enhancing effects of removing nitrogen, phosphorus and lasting organic matters. A sewage methane tank is utilized to degrade granular pollutants in the sewage, thereby greatly relieving the blocking problem of an artificial wet land. The artificial wet land and an efficient bacillus-algae pond are used for subsequent treatment, thereby greatly improving the quality of an effluent and achieving a long-acting stable effect.

The invention relates to an intelligent adjustable sacrificial anode and cathode protection device. The device comprises a singlechip, a signal processing unit, a digital/analog (D/A) conversion unit, an insulated gate bipolar transistor (IGBT) power unit, a keyboard unit, a sacrificial anode block, a buried pipeline and a reference electrode; the minimum protective potential value of the singlechip is set through the keyboard unit; the singlechip is awakened by pulse signals in every 4 seconds and used for controlling the signal processing unit to acquire the potential between the buried pipeline and the reference electrode, filtering the potential and storing the filtered potential into a data register of the singlechip; after N times of acquisition, the singlechip processes the acquired N data and outputs an increment value; the output increment value is used for controlling the impulse value of pulse width modulation (PWM); and the analog voltage generated after the impulse value is converted by the D/A conversion unit is output to the IGBT power unit, and the potential between the buried pipeline and the reference electrode is adjusted by controlling the IGBT power unit. Compared with the prior art, the device has the advantages of realizing long-term stability of the minimum protective potential of a protected body and the like.

Invention provides novel rotavirus vaccine compositions comprising rotavirus antigens, stabilizers and buffers. The buffers in the invention are pre-mixed in the rotavirus vaccine compositions to neutralize the high acidic pH of the stomach without requiring separate administration of an antacid before vaccine administration. Vaccine compositions with buffers of the invention are stable liquid rotavirus vaccine formulations for oral administration.

The invention belongs to the technical field of mining engineering and particularly relates to a grouting treatment method for strip mining goaf. The method comprises the steps of (1) drill hole position and arrangement planning, (2) instrument fixation, drilling, casing laying, and grouting pipe laying, (3) slurry raw material preparation, (4) slurry cooperation and mixture, (5) grouting operation, and (6) grouting pipe collection. The method has the advantages that the overburden strata balance structure of the strip mining is consolidated, the long-term stability of a ground surface is achieved, the stability of a building foundation is ensured, materials are saved, the environment is protected, and the method has good social and economic values and is easy to promote.