2：. High pressure jet grouting: the slurry is transported by a high-pressure pump, and generates a jet flow with huge kinetic energy through a special nozzle. It cuts the bottom layer, mixes with gravel and sand particles, and coagulates. This is called high-pressure jet grouting.
Squeeze grouting or split grouting: depending on the grouting pressure, the grout is forced to open various channels in the underground layer to squeeze into the stratum. The grout is mostly consolidated in a vein or a tree shape. This grout can squeeze the soft bottom layer tightly, so it is also called compaction grouting in foundation reinforcement. Displacement grouting: the soil and sand in the injected stratum are forced out through certain methods, and the space formed is filled with grout,kelowna Advanced small conduit factory, It is called displacement grouting High pressure mass injection grouting: the kinetic energy of jet flow is used for grouting.
kelowna .Advantages: It is connected with special hydraulic tongs does not require preparations outside the construction site, does not require any equipment is convenient and fast (5 times faster than the traditional welding method), is simple to fix the grouting pipe to the reinforcement cage, and is not affected by the bad weather.
3 cement water glass (sodium silicate) slurry cement water glass slurry is a grouting material composed of cement and water glass as the main agents, which are injected in a double liquid manner according to a certain proportion, and accelerator or retarder is added when necessary.
. Classified according to the grout materials used for grouting Cement grouting: the grout materials are mainly cement, including the addition of other additives.
The installation will not affect the characteristics of the building grouting pipe; The installation or grouting process will not harm the concrete; Permanent sealing can be ensured after grouting; If there is no leakage, grouting is not allowed. With the innovation and application development of industry technology, I have always been at the forefront of the industry. Lianye people have always been market-oriented, committed to serving the bridge construction industry, railway and highway industries, and have successively developed a series of excellent acoustic pipe manufacturers serving the construction industry, such as grouting pipe,kelowna Advance small conduit and pipe shed, pump pipe and pile foundation acoustic pipe.
● specification: inner diameter of disposable grouting pipe: 8mm; Outer diameter: 12mm; Inner diameter tolerance: ± 0.3mm; Length of each roll: 120m.
After the test of each group of test tubes is completed, the test points shall be sampled for 10% at random, and the relative standard deviation of sound time shall not be greater than 5%; The relative standard deviation of amplitude shall not be greater than 10%.
The commonly used standard for grouting pipe is the inner diameter of 50-60mm. The wall thickness of the pipe has little effect on the sound transmission so there is generally no need to restrict the thickness of the pipe wall. However, from the perspective of saving steel consumption, it is OK if the pipe wall can bear the lateral pressure of new concrete, not necessarily the thicker the better.
(the density of steel pipe is 85kg/dm calculation formula: w = 0.02466 (D-S) s where: W - theoretical weight of steel pipe per meter, kg / M; D - Nominal outer diameter of steel pipe, mm; S - nominal wall thickness of steel pipe, mm.
Process inspection. When lifting and demoulding components, the concrete strength must meet the design requirements.
Provide considerate service, solve customer problems, optimize the specific parameters and determine the grouting materials and pressure. Cement grouting material 1 cement slurry ordinary portland cement is the most commonly used cement grouting material. Its advantages are: wide source of raw materials, low cost, non-toxic, simple and convenient construction process. The disadvantages are: poor stability of cement slurry,kelowna Grouting flower tube, easy precipitation and water precipitation, long setting time, and because of the large diameter of cement particles, the injection capacity is often limited to micro cracks .
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, 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, 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, low viscosity, high gel strength, good durability and does not change the pH value of groundwater.  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, filling, extrusion and other methods to make ceramic bodies suitable for processing.Make it into a certain shape size and specification. Seepage prevention Water plugging 3
Finance Department.After the grouting hole is drilled, the grouting pipe, grout stopper, mixer and other facilities in the hole shall be installed and lowered.
Answer: it varies according to the model and elasticity of the grouting pipe, and its internal pressure can reach 150bar or more.
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 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.
kelowna . It has good impact resistance and high fracture elongation. Experience has proved that it can resist the impact of natural disasters such as earthquakes.
The installation will not affect the characteristics of the building grouting pipe; The installation or grouting process will not harm the concrete; Permanent sealing can be ensured after grouting; If there is no leakage, grouting is not allowed. Product advantages: Simple installation, complete set. No special installation equipment is required, and the cut-off length can be prepared on the construction site according to the actual requirements of the joint (it is recommended that the longest grouting outlet length should not exceed 6m). The grouting time can be arbitrarily selected.
[specific embodiment]  the following describes the utility model in combination with the attached specific embodiments.