RU182476U1 - INJECTOR FOR INJECTING IN THE SOIL OF FIXING FINE-DISPERSED SUSPENSIONS - Google Patents

Abstract

The utility model relates to construction devices and is used to fix the soil during the repair of foundations and the construction of various structures. An injector for injecting fixing fine dispersed suspension into the soil, containing a cuff pipe with injection holes protected from the outside of the cuff pipe by rubber cuffs, inside of which using the upper and a double sealing obturator is fixed to the lower sealing ring, and a suspension supply pipe to the obturator. The injector is equipped with a flow-through ring heater mounted above the upper sealing ring and encircling the obturator. A useful model increases the efficiency of injection of the fixing fine-dispersed suspension by increasing its fluidity. 1 ill.

Description

The utility model relates to construction devices and is used to consolidate the soil during the repair of foundations and the construction of various structures.

When reinforcing and eliminating cracks in the foundations of buildings, structures and historical monuments, finely dispersed fixing suspensions are used that do not change the structure of the soil, based on astringent Microdur, microcement M> 900, MC MicroRus. Features of microcements are associated with the small size of their particles and its rational particle size distribution.

“Injection“ Mikrodur ”should be carried out in the mode of impregnation, with full filling of the pore space, without gaps and with preservation of the natural structure of the soil. The maximum supply pressure of the injection composition should not exceed 0.5 MPa "(Organization Standard STO17466563-001-2011. Recommendations for injection fixation of soils using a particularly finely dispersed mineral binder (OTD)" Mikrodur "- LLC" Vesta Inzh "- M. - 2011 - clause 6.1, clause 6.2).

Known injector for injection into the soil of fixing suspensions, SU 492621 E02d 3/12 publ. 11/25/1975, including grouting and perforated pipes, separated by height by an internal partition, a tip and a cap, while the perforated pipe is made with a variable cross section, increasing in steps from the bottom to the top, and grooves are made in the upper part of each step, in the area of which there are through holes, located in adjacent steps on opposite sides.

Known injector for injection into the soil of fixing suspensions, SU 876840 A1 E02D 3/12 publ. 10/30/1981, including a grouting pipe with a tip and recesses within which the holes are located, and a perforated pipe, while the perforated pipe is equipped with replaceable liners fixed in recesses on the sides of the holes flush with the outer surface of the pipe, and the recesses are made in the form of longitudinal grooves.

Known driven injector, RU 2208087 C2 E02D 3/12 publ. 07/10/2003, including a hollow body with an outlet made in its lower part, and a tip with a shank placed in the outlet of the body, wherein the tip shank is fixed in the body by means of a spring clip to ensure the tip is separated from the body at the required injection height due to pressure supplied to the solution body.

A disadvantage of the known injectors is their operation with high-pressure feed of the fixing suspension, which leads to rupture and cracking in the soil to be strengthened.

The closest in technical essence and chosen as a prototype is an injector for injection into the soil of a fixing fine dispersed suspension (Methodical recommendations for the use of Microdur, a particularly fine dispersed mineral binder (OTD) for injection fixing of soils in construction. Alekseev SV, Nikitin A.I. . - LLC “Vesta Inzh” - M. - 2007 - P. 18 - Scheme 2), containing a cuff pipe with injection holes protected from soil contamination from the outside of the cuff pipe by rubber cuffs, inside of which and using the upper and lower o-rings, a bilateral obturator with holes and a suspension supply pipe to the obturator are fixed.

The disadvantage of this injector is not sufficiently deep penetration of the fixing suspension into the ground.

The problem to which the utility model is directed is to increase the efficiency of injection by increasing the fluidity of the fixing suspension.

The task is achieved in that the injector for injection into the soil of the fixing fine dispersed suspension containing a cuff pipe with injection holes protected on the outside of the cuff pipe by rubber cuffs, inside of which a two-sided shutter is fixed using the upper and lower O-rings, and the suspension feed pipe into the shutter. The injector is equipped with a flow-through ring heater mounted above the upper sealing ring and covering the obturator.

The utility model is illustrated in the drawing. In FIG. 1 shows a section of an injector for injection into the soil of a fixing finely dispersed suspension.

The injector contains a mounting pipe 1 with injection holes 2. Holes 2 are protected from soil contamination with rubber cuffs 3. Inside the pipe 1, a two-way obturator 6 is fixed with the upper o-ring 4 and the lower o-ring 5, with holes 7 for the suspension to exit the obturator 6. Suspension it is delivered to the obturator 6 through the pipe 8. Inside the cuff pipe 1, above the upper sealing ring 4, a flow annular heater 9 is installed, wrapping around the obturator 6. As a flow heater 9, use ring heaters (see Clamp heaters, ring heaters. http://polymernagrev.ru/khomutovye-nagrevateli?yclid=1933356714146403810), or electric heaters from taps - water heaters (power up to 3 kVA, heating temperature 60 ° C, heating set time 5 sec) (Taps for instant heating of water. Https://goodster.ru/kran_nagrevatel_vody).

The injector operates as follows.

When a crack is eliminated in the foundation of a historical monument, holes are drilled to the crack at an angle of 30-45 °. This arrangement of holes provides guaranteed filling of the crack with suspension. The holes are washed with water. A cuff pipe 1 is inserted into the drilled hole so that the injection holes 2 of the cuff pipe 1 fall into the fracture location zone. An obturator 6 with sealing rings 4,5 and a heater 9 is inserted into the cuff pipe 1. The suspension supply pipe 8 is connected to the pump hose (not shown in the drawing), and the heater 9 to a power supply (not shown in the drawing). The pump, through the pipe 8, the suspension is fed into the obturator 6, at the same time, the heater 9 is turned on, which produces heating of the injection suspension. O-rings 4 and 5 expand due to the pressure of the suspension in the obturator 6 and fix the obturator 6 in the cuff 1. The suspension from the obturator 6 enters through the openings 7 into the inner part of the cuff 1, and then the suspension is injected through the openings 2 of the cuff 1 into the foundation filling up his crack. Moreover, the suspension with high temperature has a high fluidity, which provides increased penetration into the crack. The rubber cuff 3 protects the injection holes 2 from clogging. The pressure with which the injection is carried out is directly dependent on the viscosity of the suspension, as well as on the depth and width of the crack opening. However, the selected pressure should not exceed 0.5 MPa and lead to deformations in the structure and violate the strength of the foundation. After the obturator 6 stopped taking the injection suspension, and the pressure began to rise rapidly, the injection was stopped. The obturator 6 is removed from the cuff pipe 1, then the cuff pipe 1 is cut off, and the hole is closed with repair material

The essence of the utility model.

When choosing a suspension for injection, you must first take into account its fluidity. The fluidity of the injection suspension is determined by its viscosity, which depends on the composition of the suspension and its consistency. (Solutions for injection of masonry. N. Zvorykin http://art-con.ru/node/5601).

“Viscosity determines the speed of fluid flow during its movement through narrow pipes and gaps (in particular, in friction units), filters and precipitation, as well as when moving along solid walls” (Viscosity and fluid flow, www.tehnoinfa.ru/ // plastichnostnefteproduktov / /6.html).

“A mixture of microcement has a fluidity, that is, a viscosity comparable to the fluidity of water even with a minimum W / C (water-cement) ratio.” (Injection waterproofing with microcement. Https://stroite.com/section/technologies/19-_waterproofingwaterproofi-waterproof/64 -injection-waterproofing.html).

“Water is a Newtonian fluid and the kinematic viscosity of water changes its value when heated and cooled. With increasing water temperature, its kinematic viscosity decreases. ”(Kinematic viscosity of water at various temperatures. Http://thennalinfo.ru/svojstva-zhidkostej/voda-i-rastvory/vyazkost-vody-h2o)

If we compare the viscosity of water at different temperatures, for example, at t ° = 20 ° C and t ° = 60 ° C, then the viscosity of water at 60 ° C will decrease by more than 2 times.

The application of the proposed utility model allows to increase immediately before injection the fluidity of the fixing suspension by reducing the viscosity of the suspension when it is heated, and thereby increasing the depth of penetration of the fixing suspension into the soil.

Claims (1)

An injector for injecting into the soil a fixing fine suspension containing a cuff pipe with injection holes protected on the outside of the cuff pipe by rubber cuffs, inside of which a two-sided seal is fixed using the upper and lower O-rings, and the suspension feed pipe into the shutter, characterized in that the injector equipped with a flowing ring heater mounted above the upper sealing ring and wrapping around the obturator.

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