RU2065001C1 - Method for reconstruction of buildings, constructions - Google Patents

Abstract

FIELD: civil engineering. SUBSTANCE: intersecting lines of cast-in-place staggered piles placed on both sides of the foundation are accomplished through the foundation. Then vertical spline grooves are originated under foundation foot and filled with fibrous concrete. Then soil between spline grooves is washed out and formed cavities are filled with fibrous cement with hydrophobic additions. Basement walls are formed as a result. Then horizontal anti-filtering curtain is made below design level of basement floor. Level- by-level soil excavating is performed and floor is installed and hydraulically insulated. EFFECT: high efficiency. 2 dwg

Description

 The invention relates to the field of construction and can be used for arrangement of basements in existing basement buildings and structures and deepening previously existing basements of buildings.

 There is a method of reinforcing foundations by inkjet technology, which consists in connecting under the existing foundation supports for reinforcing accidentally deformed foundations of buildings / P. Stockhammer, M. Schrank. "Sichering eines histoischen Bauwerkes nach dem SJILCRET-Verfahen." Soil mechanics and foundation engineering. 9 dem Danube-Europen conference. Budapest, Octouber 2-5, 1990. pp. 495-502 /.

 The disadvantage of this method is that when developing soil using inkjet technology in the foundation of existing foundations, it can lead to a change in the stress-strain state of the soil under the base of the foundation, the formation of a settling trough in structurally unstable soils: for example, in weak, dusty clay water-saturated soils.

 Closest to the claimed technical solution is a method of constructing a reinforcing structure under the sole of the foundation of the building in the form of intersecting rows of injection piles arranged in a checkerboard pattern and inclined on both sides of the foundation / I.A. Ganichev. The device of artificial foundations and foundations. M. Stroyizdat, 1981, p. 419, p. 8.10 /.

 The disadvantage of this method is that reinforced injection piles can absorb the load from the foundation of the building, it does not allow you to arrange buried rooms under an existing building or structure, since excavation of soil near the foundation can lead to a change in the stress-strain state of the soil under the sole, the entire load will be transferred to drilling injection piles, this will require an increase in their bearing capacity or an unjustified increase in their number. In addition, digging a foundation pit to the desired depth without enclosing a contour (basement walls) can lead to uncontrolled formation of subsidence troughs, additional (not calculated) loading of reinforced injection piles - negative ground friction along the pile shaft and the inability to work at a high level of groundwater . This method is very time-consuming and generally unsafe for the supporting structures of the building, so it is likely to cause uneven precipitation of the existing foundation, significantly exceeding the allowable for this building or structure.

 The main task to which the invention is directed is to arrange a buried room and prevent the development of deformations of the supporting and enclosing structures of the building, ensuring the reliability of the erected wall structures of the buried basement while reducing the complexity of the work, in strong, structurally and weak, dusty-clayey water-saturated soils.

 The essence of the invention lies in the fact that under the foundations of an existing building or structure, a reinforcing structure is made through the foundation in the form of intersecting rows of brown injection piles staggered on both sides of the foundation, then they are formed under the sole of the foundation along its entire width and in steps of no more than three width vertical splined slots, followed by filling them with fiber-reinforced mortar, erect the basement walls by excavating the soil under the sole with hydraulic washing and fill the formed polo Tei cement fibroarmirovannym solution with hydrophobic additives, and then within a loop large enough recessed basement operate horizontal grout curtain below the design level of the basement floor. Then, a tiered excavation is made inside the contour, limited by the foundation and the constructed basement walls, and then the floor is arranged with its subsequent waterproofing.

Distinctive features of the proposed method are: the formation under the sole of the foundation of vertical splined cuts in the walls filled with fiber reinforced mortar;
secondly, the construction of the basement walls by excavating the soil under the base of the foundation with hydraulic washing and filling the formed cavities with a fiber-reinforced solution with hydrophobic additives;
thirdly, the implementation of a horizontal air curtain below the floor mark of a buried basement;
fourthly, they produce a tiered excavation of the soil inside the contour, limited by the foundation and the erected walls of the basement;
fifthly, the device of the floor of a buried room with its subsequent waterproofing.

 The invention is illustrated by drawings, where in FIG. 1 shows a typical section of a building in which it is necessary to form a buried basement. In FIG. 2 section along AA fragment of the excavation under the sole of the foundation.

 The proposed method for the formation of buried rooms in existing basement buildings is that at the initial stage, a preventive reinforcement of the foundations 1 of the bearing walls 2 of the building is made with injection piles 3 of the required length and diameter. The injection piles 3 are made through the foundation in a checkerboard pattern on both sides of the foundation 1. Then, under the sole of the foundation, vertical splined slots 4 are formed along the entire width of it with a step of no more than three widths, followed by their filling with cement fiber reinforced mortar. The distance between them is determined by the size of the grips, for subsequent excavation under the sole of the foundation 1. After that, the walls of basement 5 are erected using inkjet technology. The erosion of the soil under the sole of the foundation 1 is carried out by a fluid flowing out of the nozzles of the monitor 6 with the simultaneous filling of the cavities with a fiber reinforced cement with hydrophobic additives. Monitor 6 is immersed in well 7 and it allows not only to destroy and wash the soil, but also to fill the cavity formed with a fiber-reinforced solution with hydrophobic additives. Then perform a horizontal air curtain 8 below the design level of the basement floor of the underground basement 9 from the condition of complete exclusion of water inflow. Then produce a tiered excavation inside the contour of the building under the buried basement 9. Later, if necessary, arrange waterproofing of the floor of the room.

Claims (1)

 A method of reconstructing buildings and structures, including the implementation through the foundation of a reinforcing structure in the form of intersecting rows of brown injection piles staggered on both sides of the foundation, characterized in that after the reinforcing structure is completed under the sole of the foundation, it is formed over its entire width and in increments of no more than three its width, vertical splined slots, followed by filling them with fiber reinforced mortar, erect the basement walls by excavating the soil under the sole with hydraulic washing and filling the sample Call cavities cement fibroarmirovannym solution with hydrophobic additives, and then perform a horizontal grout curtain below the design level of the basement floor, produce a tiered excavation within the contour delimited by the foundation and walls of the basement, and then arrange the floor with its subsequent waterproofing.

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