RU1788125C - Method of reinforcing waterfront safeguarding structure - Google Patents

Abstract

Usage: in hydraulic engineering for the creation of supporting coastal massifs. SUMMARY OF THE INVENTION: in the implementation of the method, the outer side of the support structure to its base is successively excavated of individual pits adjacent to the support structure with the remaining ground pillars between them and the elimination of each previous pit before the excavation of the next one begins. The formation of wells, cutting holes and filling them with a fixing mixture is carried out from the bottom of the pits. The slots are arranged perpendicular to the outer side of the supporting structures, and the axis of the liquid stream when cutting the slits is raised relative to the horizontal plane by an angle of 3. 3. .7 & (0.05 ... 0.12 rad). The volume of pits is set equal to the total volume of slots formed from this pit, and the latter are eliminated by removing the pulp into the pits and then impregnating this pulp with a fixing mixture. 6 ill. ate with

Description

The invention relates to the field of hydraulic engineering and relates to the creation of support coastal massifs.

The purpose of the invention is to increase reliability by increasing the bearing capacity of the support structure.

In Fig. 1 pok; reinforced support structure plan; in FIG. 2-6 is a section through FIG. 1 with a different reinforcement sequence of the shore support structure.

The method is carried out as follows.

From the surface of the earth, near the supporting support structure 1, successive digging of separate pits 2 is carried out with the remains of 3 between HHNH (Fig. 2). Then, either by washing or by mechanical drilling, a technological well 4 is passed to the design mark (Fig. 3), into which a hydromonitor device 5 is introduced, having a hydromonitor head 6 at the end, and the hydromonitor head 6 is a hollow cylinder with a lateral coaxial nozzle 7 and an end discharge hole from the bottom 8.

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The supply of working fluid 9 is carried out through a coaxial nozzle 7 through a channel 10, and air through a channel 11 (Fig. 4).

Figure 5 shows the reinforcement of the support structure as the hydromotor device rises through the channel for supplying the fixing mixture 12. From the end hole 8 of the hydraulic monitor device 5, the fixing mixture 14 is fed into the soil gap 13.

Fig. 6 shows the supporting structure 15 obtained as a result of reconstruction 1.

The following can serve as an example of using the proposed method for strengthening shore support structures.

In order to increase the bearing capacity of the shore support structures 1 from the outside of the structures to their bottom, individual pits 2 are excavated sequentially, while the virgin soil 3 is left between them, and the dimensions of the pits are determined by calculation (depending on the loads), then a technological well 4 with a diameter of 200 mm passes to the required depth (as calculated), moreover, either by hydraulic washing, or mechanically (for example, a drilling rig URB-2.5 A 2 or UGB-50, etc.). A water monitor device 5 is introduced into the well, which is a structure consisting of a water monitor head 6 and three channels for supplying a fixing working fluid 10, air 11 and a fixing mixture 12. A pipe with an inside diameter of 0.5 inches is used for supplying air a fixing fluid of -3/4 inches; and for supplying a fixing solution of -1.5 inches. The working fluid 9 is supplied under pressure Pw from 20 to 40 MPa from the pump 9T with a flow rate of .12 m / h, and air with a pressure of 2 MPa and a flow rate of ... 5 m / min. The axis of the jet of working fluid when cutting slits is raised relative to the horizontal plane by 3 ... 70 (0.05 ... 1.12 radians), this is done in order to carry out all the soil under the support structure (because as a result

the action of gravitational forces, the freely flooded liquid stream deviates downward by approximately the same amount (depending on the physicomechanical properties of the eroded soil). The volume of pits in this case is set equal to the total volume of the slots formed from this pit. In order to increase the bearing capacity (if necessary), reinforcing elements (reinforcing mesh, strapping, etc.) may be introduced. Then, when the axial hydraulic monitor 5 is slowly raised into the worked-out space 13, a fixing mixture 14 prepared from pulp and treated with a fixing mixture is supplied with support 1, and the mixture spreading along the standard cone of the AzNII should not exceed 18 ... 20 cm.

Claims (1)

The claims A method of reinforcing a shore support structure, comprising forming boreholes under the support structure, cutting gaps therefrom with a jet of liquid, and filling the gaps as they are cut with the fixing mixture, characterized in that, in order to increase reliability by increasing the bearing capacity of the support structure, from the outside of the latter to its base, successive excavations of individual pits adjacent to the supporting structure are carried out with the remaining pillars between them and the elimination of each the pit before the excavation of the next one begins, and the formation of wells, cutting the slits and filling them with the fixing mixture is performed from the bottom of the pits, while the slots are perpendicular to the outer side of the support structure, and the axis of the liquid jet when cutting the slits is raised relative to the horizontal plane by 3-7 ° (0.05 ... 0.12 radians), moreover, the volume of pits is set equal to the total volume of the slots formed from this pit, and the latter is eliminated by moving the pulp inside the pits and then impregnating this pulp s fixing mixture.