Winnipeg Leadi
Catago50lacrimInjecting grout into the embedded grouting pipe can seal construction joints,Winnipeg Grouting small conduit and advance anchor rod, cold joints, pipe leakage and joints between the ground walls.
Rigid inner core: it will not be flattened under concrete pressure to ensure smooth grouting channel.
Winnipeg .The grouting pipe without shaft roll packaging is tapped and paid off from the inner ring in the vertical state, and the drawn out pipe is spring shaped and automatically straightened. 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. Welding is strictly prohibited during use, because the strength of the welding point is much lower than that of the steel itself, and it is easy to cause broken wires at the welding point during tensioning. When the grouting pipe adopts circular reinforcement arrangement, its bending radius shall not be less than 3 times of the diameter.
When lifting and demoulding components, the concrete strength must meet the design requirements. When there are no special requirements in the design, the non prestressed members shall not be less than 50% of the designed standard value of concrete cube compressive strength, and the prestressed members shall not be less than 75% of the designed standard value of concrete cube compressive strength.
.[0024] it should be noted that the above specific embodiments are only exemplary. Under the above teachings of the utility model those skilled in the art can make various improvements and modifications on the basis of the above embodiments, and these improvements or modifications fall within the protection scope of the utility model. Those skilled in the art should understand that the above specific description is only for the purpose of explaining the utility model, and is not intended to limit the utility model. The scope of protection of the utility model is defined by the claims and their equivalents.
A 6-10m long orifice pipe is generally installed at the opening of the grouting hole to prevent possible hole collapse, and to play a guiding role in drilling. During grouting, it is used to install an orifice closing device to prevent grout leakage.
Weight per linear meter = (outer diameter - wall thickness) * wall thickness * 0.0246615 where the outer diameter refers to the outer circumferential diameter of the grouting pipe; The wall thickness is the difference between the outer diameter and the inner diameter; The above content is the calculation method of the specification and weight of the grouting pipe introduced. I hope it will be helpful to you in the future.
When reinforcing collapsible loess, sodium silicate solution with 5% sodium chloride and concentration of 10% ~ 15% is used. After the solution is pressed into the soil layer, sodium ions will react with calcium ions in water-soluble salts of the soil to form silicic acid gel between soil particles and on their surfaces, increase the cementation between soil particles, and harden the soil. The ultimate compressive strength can reach 0.2 ~ 0.8MPa. When strengthening the silty fine sand a certain amount of phosphoric acid (density 0 is added to the sodium silicate solution (density 18-2 with a low concentration. The solution is chemically reacted in the soil to harden the soil, and its ultimate compressive strength can reach 0.4-0.6mpa.
Causes of wrinkling: the blanking specification of pipe joint is too long.
2 the polymer grouting materials of the machine are mainly applied to acrylamide, polyurethane, lignin, epoxy resin, 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].
Quality assurance.Features of grouting pipe: Simple installation, complete supply; The grouting pipe can be cut at the construction site according to the actual required length of the joint (it is recommended that the longest grouting outlet length should not exceed 6m); No special installation equipment is required; Grouting time can be arbitrarily selected; When the inner grouting is performed under pressure, the slurry in the grouting pipe can keep filling the whole pipe evenly; The system allows grouting at relatively low pressure; The installation will not affect the characteristics of the building grouting pipe itself; The installation or grouting process will not harm the concrete; Permanent sealing can be ensured after grouting; If there is no leakage, grouting can be omitted.
● features: the grouting pipe is divided into disposable grouting pipe (ccll-y grouting pipe, qdm-it grouting pipe, ccll-y full section grouting pipe) and repetitive grouting pipe (ccll-d grouting pipe, ccll-d full section grouting pipe)
Development trend editor since the advent of Portland cement in 1824, cement grouting has been the main grouting method in engineering. However, ordinary cement can only be filled with sand gravel or pores with a diameter greater than 0.2 ~ 0.3mm due to its coarse particles. Therefore, improving the fineness of cement particles has become the main way to improve the groutability of cement slurry. Some countries have developed a kind of ultra-fine cement, which can pour fine sand with permeability coefficient of 10-3 ~ 10-4cm / s and micro cracks in rocks. It is a promising granular grouting material. Propionate is a kind of water-soluble polymer chemical slurry, whose viscosity is close to that of water. It is widely used in anti-seepage grouting and dynamic water plugging of fine rock cracks and medium fine sand layers. However, this kind of pulp material is toxic and pollutes the air and groundwater, so most of them have stopped production and use. In 1980, AC400 slurry was developed in the United States,Winnipeg manufacturer of composite anchor rod, and in 1982, ac-ms slurry was developed in China. The toxicity of this kind of slurry is very small (only 1% of the toxicity of propionate). It is an ideal anti-seepage slurry. The non alkaline silicate slurry developed in Japan has no alkaline pollution to groundwater, high gel strength, good durability and does not change the pH value of groundwater. [2] Grouting method is divided into ceramic process grouting and construction engineering grouting. Ceramic process grouting is the process of using the prepared mud injection in ceramic production. Construction engineering is to use appropriate methods to inject some curable grout into the cracks or pores of the rock and soil foundation, and to improve its physical and mechanical properties through replacement, size and specification. Seepage prevention Water plugging 3
When the concrete strength can ensure that its surface and edges are not damaged due to formwork removal, the side formwork can be removed.
Customer first.When installing the Hainan grouting pipe, carefully check the embedded reinforcement in the groove before the joint is lowered. If cracks or breaks are found, the position is improper or the gap is too large, remedial measures must be taken.
Appropriate measures shall be taken to prevent surface water, curing water and garbage from falling in. When necessary, a sump shall be set near the post cast strip of the base plate in combination with the design of the basement plane drainage system to facilitate the final cleaning before the grouting pipe is cast. When advance water stop is not used a sump shall be set, which can be set in the basement according to the above method, or set outdoors as a temporary facility. Usually, we use the waterproof scheme between the grouting pipe and the water surface or before, and there are many methods for the grouting pipe to stop water in advance. It should be noted that the design unit should participate in the review of the construction organization design of the basement, so as to determine a complete implementation scheme of advanced water stop before the excavation of the foundation pit and the pouring of the cushion. Otherwise, which will affect the integrity and rationality of the whole water stop scheme.
[Patent Description] fast cutting device in the hole of underground grouting pipe [technical field] [0001] the utility model relates to a device for cutting grouting pipe in a coal mine, in particular to a fast cutting device in the hole of underground grouting pipe.
Winnipeg . When the a diameter of grouting connecting reinforcement is less than or equal to 16, the a diameter of connecting reinforcement is greater than
The so-called direct grouting method refers to the method of directly placing the grouting pipe into the soil by vibrating or drilling. According to the different forms of grouting pipes, the direct grouting method can be divided into the grouting pipe grouting method, the flower pipe grouting method, the drill pipe grouting method, and the stop plug grouting method.Grouting pipe grouting method refers to the method of grouting directly through the nozzle at the lower part of the grouting pipe; The flower tube grouting method is a method of grouting through a grouting tube (flower tube) with multiple grouting holes on the side wall; The drill pipe grouting method refers to the method of grouting directly through the drill pipe for drilling.
Grouting pipe is a tubular waterproof sealing material used for grouting of concrete construction joints.