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SoletracySuppoInner diameter of repetitive grouting pipe: 8mm; Outer diameter: 20mm Inner diameter tolerance: ± 0.3mm; Length of each roll: 90m.
The aerated silicification method is to press carbon dioxide or ammonia into the soil in advance to activate the soil, then pour sodium silicate solution, and then press carbon dioxide to make sodium silicate gel. When the sand is reinforced, the compressive strength can reach 1000 ~ 3000kpa. For the sand without carbonate, the strength can be increased by 20% ~ 25% due to the activation with carbon dioxide first; The strength of sandy soil containing carbonate can be increased by 30% ~ 35% by carbon dioxide activation. When the collapsible loess with high saturation is reinforced, the reinforcement radius of the aerated silicification method can be about 50% larger than that of the single liquid silicification method.
victoria.The mesh structure of the grouting pipe can make the pore water pressure dissipate faster, and effectively accelerate the drainage and consolidation of the soft soil of the foundation. This is very important for strengthening soft clay foundation. Precautions for grouting pipe installation: when tensioning the prestressed reinforcement it shall be loaded from zero to the initial tension at the starting point of the measured elongation value, and then loaded to the required tensioning force by stages; Stress control and elongation check shall be adopted for tensioning management of prestressed reinforcement. The allowable deviation between the actual elongation value and the calculated elongation value is - 5% ～ + 10%. If the value is exceeded, the tensioning shall be suspended; Tensioning can be continued only after taking measures to adjust; If the elongation value is too small, over tensioning measures can be taken, but the tensioning force limit shall not be greater than 0.8fptk; In the multi wave curve prestressed reinforcement, in order to increase the tensile stress at the inner support and reduce the tensile stress at the lower mouth of the grouting pipe after tensioning, the technology of over tensioning and loosening can be adopted; The duct grouting shall be dense, and the strength grade of cement slurry shall not be lower than C40. Before grouting, the duct shall be wet and clean, the grouting shall be carried out slowly and evenly without interruption, and the exhaust shall be smooth. If the hole is blocked, the grouting port must be replaced, the pressure should be increased to 0.5-0.6mpa, and the grouting holes should be closed later. The grouting pressure of the vertical duct shall be determined according to the grouting height; For the duct grouting of multi span continuous prestressed tendons connected by connectors, one span shall be grouted after tensioning, and it is not allowed to grout once after all the spans are tensioned; The exposed length of the prestressed reinforcement grouting pipe after fixation shall not be less than 30mm, and the grouting pipe shall be protected with end sealing concrete. When it needs to be exposed for a long time, measures to prevent corrosion shall be taken; When the steel strand has floating rust please remove the floating rust and dirt of the steel strand at the fixed clamping section of the grouting pipe and its outer end, so that the floating rust and dirt will fill the red groove of the clamping piece during installation and tensioning and cause wire sliding; The tool clamping piece is three pieces and the working clamping piece is two pieces. The two cannot be mixed. The working grouting pipe cannot be used as a tool and the grouting pipe cannot be reused; The grouting pipe shall be kept properly and shall be free of rust, when the prestressed tendon is long and the grouting pipe must be repeatedly tensioned and fixed, it is recommended to apply a small amount of lubricant (such as withdrawing the grouting pipe) in the conical hole of the grouting pipe plate, which is not only conducive to the follow-up of the working clip and withdrawing the grouting pipe,victoriaAdvance small conduit and pipe shed, but also conducive to the multiple grouting pipe fixation of the grouting pipe; The outer surface of the tool clip and the inner surface of the conical hole of the grouting tube plate shall be coated with lubricant before use, and the debris on the clip surface shall be removed frequently to make the grouting tube flexible. However, when the clip is cracked or the tooth surface is damaged, it shall be replaced and shall not be used again; Safety measures shall be taken during tensioning, and no one shall stand after tensioning the jack; The grouting pipe solid system shall be used together and shall not be mixed with other systems. If the static load test is to be conducted, please clean the clamp with organic solvent (such as gasoline) and wipe the anti rust oil of the grouting tube plate hole, otherwise the solid performance of the grouting tube will be affected; The pile foundation grouting pipe is an important channel product for pile foundation depth detection. It has two main s one is as a channel, there will be some deviation in the calculation formula of the weight of the precise grouting pipe. Next and the other is as a pipe for grouting at the bottom of the pile.
The headache formula for calculating the weight per linear meter of the grouting pipe is: (perimeter / 14 - wall thickness) * wall thickness * 0.02466 = how many kilograms per meter of the grouting pipe. This formula is a calculation formula trusted and recognized by most grouting pipe manufacturers. However, I will tell you the actual application of several specifications.
.2 the polymer grouting materials of the machine are mainly applied to acrylamide, polyurethane, lignin, unsaturated ester, etc. Generally, when the sand particle size is ≤ 0.5 mm or the rock crack opening is ≤ 0.2 mm, and the groundwater flow rate is > 500 mm / min, the use of organic polymer chemical grouting materials can solve the engineering problems that cannot be solved by ordinary cement slurry [5].
Application scope: This product can be widely used in subway, tunnel, water plant and sewage treatment plant, swimming pool and upstream amusement park, dam,victoria32lead small conduit, ship lock c, reservoir and ditch, nuclear power station, primary and secondary cofferdam facilities, bridges, commercial and industrial buildings, garages, stadiums, aquariums, water tanks and similar structures. Grouting channel for deformation joint, construction joint leakage maintenance and embedded water stop. Slurry pipe (theoretical weight per meter)
The distance between measurement points is 40cm, and when abnormalities are found, it is encrypted to 20cm.
When the daily average temperature is lower than 5 ℃,victoriaAdvance support of small conduit, no watering and thermal insulation measures shall be taken. Steam curing can be used when the temperature cannot reach the natural curing conditions or early demoulding is required. Generally, steam curing should be carried out at a temperature of about 65 degrees. Canvas and tarpaulin should be used for curing. In order to avoid crack deformation of concrete components caused by sudden rise and fall of steam temperature, the speed of temperature rise and drop must be strictly controlled.
The grouting pipe can be divided into unconstrained grouting pipe and constrained grouting pipe according to whether it can absorb the pressure thrust (blind plate force) generated by the medium pressure in the pipe; According to the displacement type of the grouting pipe, it can be divided into axial grouting pipe, transverse grouting pipe, angular grouting pipe and pressure balance grouting pipe. The grouting pipe cannot bear load and should be hoisted separately; In addition to the pre deformation required by the design for pre stretching or cold tightening, it is forbidden to adjust the installation deviation of the pipeline by deforming the grouting pipe; During installation, in the structural design of the grouting pipe, the contact between the external corrosion medium and the grouting pipe can be considered. For example, for the external pressure axial grouting pipe, a packing sealing device can be added between the outlet end ring and the outlet pipe, which is equivalent to the sleeve grouting pipe. It can not only resist the invasion of external corrosive media, but also add a safety barrier to the grouting pipe. Even if the grouting pipe is damaged, the grouting pipe can also play a compensation role and avoid the failure of the grouting pipe. The use of grouting pipes has been indispensable in modern building construction. In the 1960s, grouting pipes were popularized in China but they were fastener grouting pipes. In the 1980s, China began to develop advanced grouting pipes with multiple s. With the continuous development of China's construction industry in modern times, the construction industry has become increasingly mature and perfect in China, and the bamboo wood grouting pipe has been eliminated by the market. Grouting pipe has become the mainstream form of grouting pipe and is more widely used in construction.
The construction steps of the three grouting methods are basically the same: the lower pipe grouting pipe grouting method and the flower pipe grouting method generally use the vibration method to place the grouting pipe into the soil at a predetermined depth. In the case of a large depth, the method of pre drilling a certain depth and then vibrating in can also be used. The drill pipe grouting method directly relies on the drilling method to place the grouting pipe (drill pipe) into the soil.
Direct labor.Grouting parameters such as grouting pressure and reinforcement radius can be determined through field tests according to geological conditions and engineering requirements. Grouting holes are generally arranged in an equilateral triangle or rectangle on the plane. The reinforcement radius of collapsible loess is generally 0.5-0.7m, and the reinforcement depth is generally 3-8m. The advantage of silicification method is that the grout has strong permeability and can quickly terminate the deformation of the foundation; It is non-toxic, does not pollute the environment, and is cheap, so it is widely used.
Steel pipe, plastic pipe or steel corrugated pipe should be used as acoustic detection pipe, and its inner diameter should be 50 ~ 60mm. The connection of detection pipes shall be smooth transition, the nozzle shall be more than 100mm higher than the pile top, and the upper end shall be covered. There shall be no foreign matters in the pipe and no damage to the pipe body.
The cement grouting method is applicable to the grouting of gravel layer and rock fissure. Ordinary portland cement is generally used, the water cement ratio is 1:1, and 2% ~ 5% water glass can be added as the accelerator. Ordinary extrusion mortar pump is used for grouting, and the maximum grouting pressure shall not exceed 1MPa. For silty fine sand and cohesive soil with permeability coefficient less than 10-4cm / s, split grouting can be adopted. The consistency of the cement slurry used for split grouting is large, and the water cement ratio is 0.45 ~ 0.60. Flower tube method and one-way valve tube method are adopted for grouting. The maximum pressure of grouting is generally greater than 4MPa.
Classified according to the way in which the slurry enters the stratum to generate energy. Static pressure grouting: the slurry is transported by a grouting pump to make the slurry enter or permeate into the injected stratum hydraulically, which is called static pressure grouting.
Analysis project.The flexibility of the product is very high, and it is easy to place at the corners without cutting and connecting.
It is laid in the soil, and through the bite and interlock between the grouting pipe mesh and the soil, it forms an efficient stress transmission mechanism so that the local load can quickly and effectively spread to the large area of soil, so as to reduce the local failure stress and improve the service life of the project. The convex joint steel plastic grouting pipe is an upgraded product of the ordinary steel plastic grouting pipe, which changes the shortcomings of the ordinary grouting pipe, the easy cracking of the welding point, the difficulty of construction, and the reduction of the role of side displacement prevention. Due to the change of material ratio and construction technology, the peeling force of the welding joint is between 500N and 600N, which effectively changes the above shortcomings of the traditional steel plastic grouting pipe. Because of the protruding joints at the welding position, it is called convex joint steel plastic grouting pipe, and its academic name is node reinforced steel plastic grouting pipe. The steel plastic grouting pipe is made of high-strength steel wire (or other fibers) through special treatment, polyethylene (PE) and other additives, it is a high-strength reinforced geotextile. This single belt is woven or sandwiched at a certain distance longitudinally and horizontally, and is formed by welding its junction with the fusion welding technology of special reinforcement bonding. The grouting pipe is set out from the inner ring tap in the vertical setting out state, and the drawn out pipe forms a spring shape and stretches automatically. Takeout direction: the spiral direction of the spring shape after takeout is consistent with the twisting direction of, otherwise fried dough twist or disorder will occur.
During concrete construction, special personnel shall be assigned to take care of the reserved and embedded reinforcement, formwork and water and electricity to prevent deformation and displacement. In addition, the calendering of the component surface and the roughening of the laminated plate surface shall be carried out in time.
victoria. The system allows grouting at relatively low pressure.
The flexibility of the product is very high, and it is easy to place at the corners without cutting and connecting.
When the a diameter of grouting connecting reinforcement is less than or equal to 16, the a diameter of connecting reinforcement is greater than