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San JosePipe sInjecting grout into the embedded grouting pipe can seal construction joints,LouisvilleDouble layer small conduit advance support, cold joints, pipe leakage and joints between the ground walls.
Water pressure test water pressure test is to use the grouting pump to inject clean water into the grouting section. Its main purposes are: check the grouting stop effect of the grouting stop pipe head especially the grouting stop plug.
Louisville. It has good air tightness, low gas permeability, strong sealing and no leakage.
After the grouting hole is drilled, the grouting pipe, grout stopper, mixer and other facilities in the hole shall be installed and lowered.
. When the concrete strength can ensure that its surface and edges are not damaged due to formwork removal, the side formwork can be removed.
The proper grouting time can be selected after the concrete curing. Leakage joints can also be permanently sealed in this way.
Type of grouting pipe: disposable grouting pipe: grouting once, non reusable.
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.
At the same time, because the space in the grouting pipe restricts the lateral sliding and rolling of the soil particles inside, resulting in friction. This friction force is generally called &bite force& or &lateral force resistance&. The &surface friction& and &bite force& make the slip and roll of soil particles under the force of the upper limit line at the location of the grouting pipe, and limit the lateral displacement of soil in the whole plane of the grouting pipe. The grouting pipe plays an important role in the key points of settlement. Therefore, it is reasonable to use the grouting pipe to treat the uneven settlement of fill excavation transition subgrade. This paper yzes the action mechanism of the grouting pipe according to its type and characteristics, introduces the construction technology and process in the construction of preventing the reflection crack of the road surface, and proposes a new technology of sprinkling a layer of filler in the grouting pipe network when paving the surface course. As a kind of road reinforcement material, grouting pipe is widely used in road maintenance engineering because of its advantages of simple, fast construction and low investment.
The installation is simple fast and firm. At least one part of the grouting conduit buried in the concrete shall be firmly bound with the structural reinforcement; The length of the grouting duct leading out of the concrete shall not be less than 150mm; The leading end of the grouting conduit shall be set at a convenient and accessible position. No part of the grouting conduit shall be flattened or bent to avoid affecting the flow of grout. The opening end of the conduit shall be temporarily blocked to prevent foreign matters from entering. The damaged part of the grouting pipe shall be cut off, and the grouting pipe with the installed grouting pipe shall be re set at the cut-off part, and shall be overlapped with the original grouting pipe at both ends.When binding or welding reinforcement near the grouting pipe temporary shielding measures shall be taken to protect the grouting pipe. The calculation of the reserved expansion amount of the grouting pipe and the bridge expansion joint changes all the year round. With the change of temperature and the change of vehicle live load, the bridge will shrink and deform. The grouting pipe and the bridge expansion joint play a major role at this time. The expansion amount of the grouting pipe and the expansion joint must be calculated accurately. The installation and construction of the grouting pipe and the expansion joint need to ensure the quality. We should select the model and type of grouting pipe and bridge expansion joint, and determine the installation time, installation season and temperature of grouting pipe and expansion joint. Calculate the large and small preload of grouting pipe and expansion joint.
Sincere service.[specific embodiment] [0015] the following describes the utility model in combination with the attached specific embodiments.
2 the polymer grouting materials of the machine are mainly applied to acrylamide, polyurethane, lignin, epoxy resin, unsaturated ester, etc. Generally,LouisvilleSupport small conduit, 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].
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,LouisvilleTunnel small conduit, illite and montmorillonite.
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, 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.
retailer.[0019] a flange I and a bearing 8 are provided on the outer surface of the cutting rotating device The fast cutting device in the hole is installed in the grouting pipe hole through the flange. The fixed cutting device 2 is mainly composed of a cutting blade and a pulley. The expansion and contraction diameter of the blade is adjusted by the bolts at the tail of the rotating flange to cut the grouting pipe. The rotating blade and the pulley are connected to the rotating device through slots.[0020] the outer diameter of the cutting rotary device 5 is 2mm smaller than the inner diameter of the grouting pipe, so that the device can smoothly extend into the grouting pipe for cutting.
In the construction of some grouting pipes, after the completion of the construction of the project, because some construction personnel did not take protective measures after the completion of the grouting pipes, the project was damaged due to some external factors. In order to help users effectively improve the construction quality of the grouting pipes, the following article introduces the protective measures that should be taken after the completion of the construction of the waterproof layer of the grouting pipes. For various engineering designs, waterproof and water stop shall be carried out throughout the whole process of grouting pipe until the backfilling soil is completed.
The flexibility of the product is very high, and it is easy to place at the corners without cutting and connecting.
Louisville.The double liquid silicification method is suitable for strengthening sandy soil with permeability coefficient of 0 ~ 0m/d or for seepage prevention and water stop. A sodium silicate solution having a density of 35 to 44 and a calcium chloride solution having a density of 26 to 28 are used. After the two solutions are contacted with the soil, reduces the operation intensity of workers by using the lead screw principle, and reduces the quantities of clearing the roadway floor by using the rotary cutting in the casing pipe; The cutting depth can also be adjusted at will according to the actual situation of the roadway. The working efficiency is 4-5 times higher than that of manual cutting, which can greatly reduce the labor intensity of workers.
Injecting grout into the embedded grouting pipe can seal construction joints, cold joints, pipe leakage and joints between the ground walls.