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SoletracySuppoWhen 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.
[0016] a fast cutting device in the hole of a underground grouting pipe, as shown in Fig. 1, the fast cutting device in the hole mainly consists of a fixed cutting device 2 (as shown in Fig. , a tension blade device 3 and a cutting rotating device [0017] the tension blade device 3 is sleeved in the cutting rotating device 5, and screw threads are respectively set on the outer surface of the cutting rotating device 5 and the upper end of the tension blade device 3, The tension blade device 3 and the cutting rotating device 5 are connected by threads. The end of the tension blade device protruding from the cutting rotating device is provided with a tension blade nut 4, transportation conditions, etc., hot press vulcanization (grouting pipe) or welding (plastic grouting pipe) shall be used. The joint appearance shall be smooth and smooth, and the tensile strength shall not be less than 80% of the base metal. The so-called &overlapping& without any treatment is absolutely not allowed. All kinds of cross connection points of grouting pipes shall be made of accessories produced by our new rubber products factory, so as to ensure that on-site connection is only carried out in straight sections during construction. Flexible material with sufficient deformation capacity and good adhesion with concrete.
Foshan Shengda building materials introduction product advantages Simple installation, complete set; The grouting pipe can be intercepted 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 grouting is carried out internally under the pressure, the grouting pipe liquid can keep uniformly filling the whole pipe; The system allows grouting under relatively low pressure; 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; ten
.2 the particle size of cement clay paste clay is generally very small (less than 0.005mm), the specific surface area is large, and it has colloidal chemical characteristics when encountering water. The characteristic of clay minerals is that their atoms are arranged in layers, and different arrangements form different clay minerals, the most common being kaolinite, illite and montmorillonite.
Display and record the time history curve of the received signal in real time.
Advantages of grouting pipe grouting pipe is an embedded grouting pipe system, which is used for permanent sealing of construction joints, cold joints,LavalAdvance small conduit tunnel, pipe seepage joints and gaps between ground walls in concrete. It is very suitable to install grouting pipes between the joints of new and old concrete. When water penetrates into the joint, and the other two groups are used for curing under the same conditions to determine demoulding and allowable lifting time. It depends on what kind of syrup you inject. What kind of construction site. There are two kinds of general grouting pipe inner diameters 32 and 3 The diameter of the hole is 25-60mm at most. There are also about 100mm.
It is a thermoplastic material it can be sealed by injecting slurry into the PVC port set on the surface. The proper grouting time can be selected after the concrete curing. Leakage joints can also be permanently sealed in this way.
Slump test shall be carried out for concrete entering the site. No less than 3 groups of test pieces shall be made for the same batch of concrete with the same strength grade. One group is used for standard curing, which can be processed and formed many times, providing convenience for hot melting and electrofusion connection of pipes.
[0022] when the utility model is in use, the flange plate is used to fix the utility model and the flange plate of the underground grouting pipe, the bolt is rotated with a tool, the cutting blade is adjusted to a certain position by the screw on the bolt, and then fixed, and then the screw cap of the blade is rotated and tightened to make the cutting blade and the pulley contact the inner surface of the grouting pipe with a certain contact force, that is, neither loose nor tight. The cutting blade and the pulley are directly inserted into the concave groove of the rotating device through the slot, and the cutting rotating device is fastened and rotated by a wrench or a tooth wrench, and the pulley and the blade are driven to rotate by the rotation of the bolt, thereby rotating the casing. The pulley is located on the other side of the rotating device, corresponding to the blade. It is mainly used to reduce the friction between the rotating device and the casing wall, and fix the position of the blade in the casing, so as to prevent the blade on one side from shifting during cutting,LavalTunnel small conduit, failing to achieve the cutting purpose, or even damaging the blade. The fastening bolt is rotated by a wrench or tooth wrench, so as to drive the pulley and blade to rotate. The cutting rotating device cuts the casing. When the casing is cut to a certain depth, the blade nut is tightened again and the cutting continues until the casing wall is cut through. It has the characteristics of 4-5 times higher work efficiency than manual cutting and lower labor intensity of workers.
Welcome calls .It depends on what kind of syrup you inject. What kind of construction site. There are two kinds of general grouting pipe inner diameters 32 and 3 The diameter of the hole is 25-60mm at most. There are also about 100mm.
The grouting pipe can be intercepted 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 grouting is carried out internally under the pressure, the grouting pipe liquid can keep uniformly filling the whole pipe; The system allows grouting under relatively low pressure; seven
Advantages of disposable grouting pipe: simple installation complete set. No special installation equipment is required, and the grouting time can be arbitrarily selected.
Product specification of disposable grouting pipe: outer diameter: 12mm; Inner diameter: 8mm; Inner diameter tolerance: ± 0.3mm; Packing quantity: each roll of grouting pipe is 120m long.
Home page recommendation.In fact, this 0.0246615 is the result of the Pi of 1415926 times the density of 85 and then divided by 1000. If you don't bother the formula can also be written into the following form to calculate the weight per linear meter: weight per linear meter = (diameter - wall thickness) * 1415926 * wall thickness / 1000 * 8
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, 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, welding slag is not allowed to splash onto the surface of grouting pipe and suffer other mechanical damage; All movable components of the grouting pipe shall not be jammed by external components or restrict the normal operation of its movable parts. Most of the failure of the grouting pipe is caused by the external environment corrosion. Therefore, 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.
[background technology] [0002] at present, some coal mines across the country use the grouting technology of coal seam floor aquifer to control water disasters, and have achieved obvious results. However, the grouting pipe after grouting exceeds the exposed part of the roadway floor and has different lengths. Most mines adopt mechanized coal mining technology, and hydraulic support and scraper conveyor need flat floor. At present, the mine still uses a hacksaw to manually cut the underground grouting pipes. It needs to clear some of the grouting pipes exposed from the roadway floor, laborious and inefficient. On average, each person cuts I grouting pipes every 2 hours.
Laval.The electric double fluid silicification method is suitable for strengthening soft clay foundation with permeability coefficient less than 0.1m/d. The grouting pipe with holes is used as the anode, and the reinforcement or filter pipe driven into the soil layer is used as the cathode. The sodium silicate and calcium chloride solutions are pressed into the soil layer through the grouting pipe and supplied with direct current. Under the action of electroosmosis, the pore water diffuses from the anode to the cathode, and the solution flows from the anode to the cathode along with the movement of water, so that the grouting effect is improved. The reinforcement cost of this method is high,LavalSeamless small conduit, and it can only be used after it is confirmed to be effective by tests.The alkali solution method is to heat the sodium hydroxide solution (alkali solution) to 80 ~ 100 ℃ and pour it into the soil layer through the grouting pipe with holes under its own weight. When the content of calcium and magnesium ions in the soil is high (such as loess), the surface of the soil particles will be activated and self cemented, so as to improve the strength and water stability of the soil, which is called the single solution method; When the content of calcium and magnesium ions in the soil is less (such as general cohesive soil)
In order to ensure the good flatness of the road surface, the road surface should be paved first, and then the Hainan grouting pipe should be slotted and installed. The grouting pipe has become the preferred pipeline for long-distance gas transmission in residential areas, factories, and gradually replaced the traditional galvanized steel pipe to become the mainstream of the market. There are many connection methods for the grouting pipe, which can be constructed according to the difficulty of the terrain. It has a service life of 60 years, The advantages of not easy to corrode have established the superiority of grouting pipe in the market. Next, Xiaobian will tell you about the five applicable conditions of the grouting pipe.
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, and coagulates. This is called high-pressure jet grouting.