Double-fluid single-system air pressure energy storage grouting machine and grouting process

Abstract

The invention discloses a double-fluid single-system air pressure energy storage grouting machine and a grouting process. The objective of the invention is to provide the structurally simple groutingmachine capable of efficiently controlling the water leakage of underground buildings and the grouting process. The grouting machine mainly comprises an energy storage grouting tank for first fluid, an energy storage grouting tank for second fluid, an air compressor, a proportioning mixer, intake opening and closing valves, liquid level indicators, a pressure-balancing communicating pipe, balancing communicating valves, an expansion grouting nozzle and the like. The flow of the grouting process is as follows: the expansion grouting nozzle is buried; a two-way valve is switched to a position G1of an air supply pipe; the air compressor is opened to supply pressured air to the energy storage grouting tanks; the two-way valve is switched to a position G2 of the air supply pipe; the air compressor applies pressure to the air supply pipe; high-pressure air is directly pressurized into water leakage cracks of a grouted body via the expansion grouting nozzle; grout outlet valves of the energystorage grouting tank for the first fluid and the energy storage grouting tank for the second fluid are opened to start grouting; the grouting proportion of the first fluid and the second fluid is controlled by the proportioning mixer; after pressure reaches a set termination pressure, grouting is kept for a certain period of time; the expansion grouting nozzle is taken out; and the grouting opening is sealed.

Description

technical field [0001] The patent of the present invention relates to the technical field of water leakage treatment of underground buildings and structures, and specifically relates to a double-liquid single-system air pressure energy storage grouting machine and a grouting process. Background technique [0002] With the vigorous development of my country's urban subways, expressways, and high-speed railways, underground buildings (structures) have multiplied geometrically. Water problems are ubiquitous, which leads to the deterioration of the use environment of underground buildings (structures), and brings hidden dangers to engineering safety. [0003] There are various types of diseases of underground buildings (structures). According to the analysis of domestic and foreign relevant data and a large number of engineering practices, among the many diseases that affect the use environment and safety of underground buildings (structures), the most common and first need to be...

AI Technical Summary

Problems solved by technology

[0004] At present, one of the main technical means to control the leaking water of underground buildings (structures) is to use the grouting process to block it. Electric "single liquid single system" or "double liquid double system" grouting technology, although these technologies have been used in engineering seepage water treatment for more than 100 years, and there are many successful cases, but most of the later The treatment effect is not very satisfactory, the reasons are as follows: first, direct grouting is adopted under the action of seepage water with osmotic pressure, and the grout in the early stage is easily diluted by the seepage water, thereby reducing the mechanical properties of the gel; The grouting process mostly adopts single-liquid single-system or double-liquid double-system. The two liquids are injected into the body through their own paths. Not only the ratio of the grout is relatively random, but also the mixing of the grout is extremely uneven, and the impermeability of the gel and anti-extrusion strength are difficult to meet the requirements of the treatment project; thirdly, the setting of the grouting channel is unreasonable, and the "grouting nozzle" is directly buried along the crack, which does not meet the necessary grouting conditions of "closed and compressed" in the grouted area. When the grout is injected into the poured body under "no pressure", the gel is difficult to achieve the purpose of airtight sealing; finally, the pressure of this piston type grouting pump increases gradually during the grouting process, and the grout in the poured body It advances step by step in the form of a "pulse", which can easily cause "super-diffusion" (an invalid diffusion for the purpose of grouting), forming many seepage "weak surfaces" (in the gel body form a discontinuous surface)

Fourth, the seepage water cracks have been filled with the seepage water body. Only by completely driving the seepage water body away can the effective replacement space for the grouting fluid be "freed up", but the current grouting process is difficult to achieve this effect. These traditional grouting Inadequacies and defects in the process have become the consensus of the industry

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