RU2013495C1 - Method of levelling edifices constructions - Google Patents

Abstract

FIELD: building industry. SUBSTANCE: method comprises steps of providing additional supports under a foundation of an edifice by drilling wells, being grouped by two for each well support; making vertical slot-type cavity by hydraulic washing out between the grouped wells and the horizontal cavity for the support; filling the cavities, had been formed, by inert material with simultaneous washing by clean water and subsequent injection of hardenable filler. A mark of the support top portion corresponds to 1.2-1.5 of mean sagging value of the edifice, construction from its central axis. EFFECT: simplified technique of levelling edifice. 2 cl, 5 dwg

Description

 The invention relates to the construction and can be used to level settled buildings.

 A known method of leveling the structure, including removing soil under the structure by developing in the soil the base of the cavity from the side opposite the roll, before developing the cavity, arrange the fence of the base of the structure at a distance from it, the cavity is developed in the form of a vertical trench located between the structure and the fence, facing the foundation the wall of which has a groove located below the bottom of the foundation of the structure, and after developing the cavity, the soil is extruded under the structure from the sides Opposite bank, into the cavity through a ground posts ultrasonic oscillation frequency [1].

 The disadvantage of this method is its complexity, as it requires a large amount of excavation and does not exclude the possibility of collapse of the soil in the pit, especially in dissimilar soils, which can cause overstrain of the structure, and the settlement of the structure will be uneven.

 There is also a method of leveling structures, including the formation in the soil of the well of the structure opposite the roll, soaking of the soil and its movement into the wells, additional wells are filled in the soil filled with drainage material, and the soil is soaked through additional wells, the main and additional being oriented vertically and placed alternately with a step between adjacent wells, with the formation of a row located at a distance from the foundation of the structure equal to half the step between adjacent wells [2].

 The disadvantage of this method is that the alignment of the structure is carried out only from the side opposite the roll, which does not guarantee the possible settlement of the building and on the other hand.

 Closest to the invention, the technical solution is a method of leveling a building, structure, including drilling wells under the settled part of the building, structure, installing injection pipes into the well and supplying filler into the well through injection pipes, and cylinders are placed in the wells simultaneously with the injection pipes, the injection pipes being placed in the upper part of the cross section of the wells, and before filing the filler, the cylinder is filled with air under pressure until the building, structure by a specified amount and eredno steps dropping air pressure in the cylinders, wherein the supply of filler to produce the well after each pressure release stage to the lower part of the cavities formed between the respective cylinders at their discharge into the pressure wells and walls, after which the cylinders were removed and wells tamponiruyut [3].

 The disadvantage of this leveling method is that using horizontal wells, only minor subsidence can be eliminated, subsidence of soils located below horizontal wells cannot be completely eliminated, moreover, the elimination of subsidence is provided only from the side opposite to the heel of the building, structure and is not guaranteed on the other side.

 The purpose of the invention is to increase the efficiency and reliability of work, especially in multilayer subsidence soils.

 This goal is achieved by the fact that the method of leveling the building, the structure includes drilling wells, arranging cavities under the foundation, filling them with inert material and injecting with a hardening aggregate. The device of supports is produced along the entire contour of the building, construction, by drilling two wells for each support with the development of a gap cavity (vertical) between them using a tee hydraulic nozzle and the subsequent formation of a cavity for an underground foundation using tee and direct hydraulic nozzles. The cavities are filled with an inert material while washing with clean water, injected with a hardening aggregate, and all supports are installed at a mark corresponding to 1.2-1.5 of the initial subsidence of the building, structure. Work is carried out, starting from the side opposite the roll of the building, structure, at the same time control over the alignment process is being carried out.

 The formation of a vertical slit cavity between the wells and the cavity under the support is carried out by hydraulic washing by supplying clean water through the first well and removal of the washed-out rock through the second well by vertical and horizontal movement of hydraulic nozzles.

 For the formation under the foundation of a building, the construction of cavities of a given configuration and size, hydraulic nozzles with two types of tips are used. The first is for the formation of a cavity-gap between two drilled wells and a cavity under an additional foundation in a heterogeneous environment (construction debris, boulders). The second - for the formation of a cavity under an additional foundation in homogeneous soils (sand, sandy loam, loam).

 Thus, the novelty and inventive step of the proposed method lies in the fact that the installation of additional foundations is carried out along the entire contour of the structure, which is extremely necessary when the building is located, the structure on subsidence soils, since the one-sided alignment of the building, structure can be temporary, and the process of subsidence can go on and on.

 The construction of additional supports under the building, the construction begins from the side opposite the roll, advancing to the sagging part of the building, while the top of all additional supports, starting from the extreme, located on the side opposite the roll, is set at a mark corresponding to 1.2-1.5 the value of the initial drawdown of the building, structure. In this case, there is a gradual settlement of the building, first from the side opposite the roll, and then under the initially settled part.

 The way to make supports by forming a building under the foundation, constructing voids, filling them with inert material, followed by injection with a hardening aggregate, without building open pits for supports in the existing practice of leveling buildings, structures is not found.

 The above allows us to conclude that the method of leveling buildings, structures by erecting supports under the building, structure and device for its implementation in comparison with the known technical solutions meets the criteria of "Novelty" and "Inventive step".

 In FIG. 1 shows an axial building before starting work on its alignment with the proposed installation of supports, section; in FIG. 2 - floor plan with the location of the supports; in FIG. 3 is a section AA in FIG. 2; in FIG. 4 - the process of cavity formation under the support, section; in FIG. 5 is a diagram of the formation of a cavity under the support.

 The proposed method is carried out in the following sequence.

 At the work site in the immediate vicinity of the building foundation, structure 1, two vertical wells 3 and 4 are drilled under each support 2 for each support 2. After drilling the wells, a tee-type hydraulic nozzle is screwed to the depth of the underground foundation at the end of the drill pipe 5 and the gap between the wells is hydraulically washed 3 and 4 to form a vertical slit cavity. If there is heterogeneous soil in the cavity being developed (construction waste, boulders) with the same hydraulic nozzle 6, the cavity is washed out under the underground foundation through the borehole 3 by shuttle movement of the tool from bottom to top and top to bottom with a gradual rotation of the nozzle around the vertical axis until the required cavity dimensions are reached.

 In homogeneous soils, a direct hydraulic nozzle 7 is screwed onto a hydraulic nozzle (tee) 6. Through a vertical slotted cavity, it is lowered to the bottom of the face and erosion of the soil begins with the same shuttle movements of the tool. Pure water and eroded rock leave through the second well 4 and fall into the sump 8.

 After erosion of the soil and the formation of a cavity of a given size through the borehole 4, an inert material is charged while washing with clean water through the main borehole 3.

 Similar operations on the construction of supports are carried out along the entire contour of the building, structure, starting from the side opposite the roll, while simultaneously observing the settlement of the structure to a value corresponding to 1.2-1.5 of the initial drawdown. After this, hardening aggregate is injected in the sequence of construction of underground foundations.

 The distance between the wells is set equal to the length of the straight nozzle, which in turn should be commensurate with the estimated radius of the underground foundation.

 The volume of the developed cavity is controlled by the volume of the removed rock, the volume of the loaded inert material. Control over the settlement of the building is carried out according to previously established benchmarks. Monitoring the filling of voids is carried out by the exit of the hardening aggregate from the additional and main wells.

Example. An experimental testing of the proposed technology was started with the restoration of the one-sided precipitation of the building of the music school in Ashgabat in the following sequence of works. Reveal the value of the building draft. Two wells are drilled for each support, starting from the side opposite the building’s roll, around the entire perimeter to a depth of 6 m. A vertical cavity is formed between the two wells using a tee hydraulic nozzle attached to the drill string. Hydro-erosion cavities are developed under the support with dimensions of 2x1 m, while eroded soil through the second (additional) well along with the solution is sent to the sump. After the cavity is formed through the second well, inert material (washed sand) is loaded into it while washing with clean water, while the volume of the loaded material was equal to the volume at which the top of the additional foundation corresponded to 1.3 of the initial drawdown of the building. The pressure of the flushing fluid at the bottom was 5-8 kg / cm ² at a flow rate of 4.0-4.5 m ³ / s. Constantly monitor the settlement of the building. Washed sand is injected with cement mortar, cement grade 400. The building settlement is controlled according to previously established benchmarks.

 The economic efficiency of the method used was determined as the difference between the cost of restoring the building’s normal position with the help of fragments of pits and the construction of piers by the open method and the cost of straightening by drilling wells with the device supports based on gravel and pebble deposits.

Claims (2)

 1. METHOD FOR ALIGNING BUILDINGS, STRUCTURES, including the implementation of supports by drilling wells, forming cavities and filling them with inert material, characterized in that the supports are located along the entire contour of the building, structure, starting from the side opposite the roll, grouping two wells under each support, and when cavities are formed, a vertical slot cavity between the grouped wells and a horizontal cavity under the support are developed, and filling the cavities with an inert material is carried out simultaneously washing with clean water, followed by injection of hardening aggregate to the mark of the top of the supports, corresponding to 1.2 - 1.5 of the average subsidence of the building, structure from its central axis and at the same time monitor the leveling of the building, structure.  2. The method according to p. 1, characterized in that the development of a vertical slotted cavity between the grouped wells and a horizontal cavity under the support is carried out by hydraulic washing - by supplying clean water through the first well and removing the washed out rock through the second and horizontal displacement of the hydraulic nozzles.

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