SU1539262A1 - Antimudflow structure - Google Patents

Abstract

The invention relates to anti-landslide structures used to hold landslides on unstable slopes, slopes and open pit walls, and allows reducing the material consumption of the structure and increasing its bearing capacity. The design includes pile rows 5 and 6, placed from the condition of non-squeezing of the ground by the landslide, and can include rows 7 and 8 of vertical, pre-tensioned anchors. The heads of the piles and anchors are combined by a grillage 9, and the lower ends are deep below the sliding surface 3 of stable ground 4 and ankered in this ground. The distance A between the pile rows is determined from the condition A≥ {E _op -NS-P (COS CTGϕ ± SINΑ)} / {γH (COSΑTGϕ ± SINΑ) + C}, where E _op is the landslide pressure exerted by 1 running. m wide landslide

N is the number of piles that fall into the landslide zone with a width of 1 running. m

S is the limiting effort to cut a section of one pile

P - the force of reduction of the average width of the part of the grillage in the creeping soil

α is the angle of inclination of the sliding surface of the sliding soil to the horizontal

ϕ is the angle of the internal friction of the ground at the level of the sliding surface

C - specific soil adhesion in the level of the sliding surface

γ - the average specific weight of the creeping soil

H - landslide thickness. The sign in brackets is taken as "+" - when the anti-landslide structure is located on a slope section with an upward branch of the sliding surface

"-" - when the anti-landslide structure is located on a portion of the slope that has a downward branch of the sliding surface. Width in about

Description

The invention relates to the construction and construction of a landslide construction, which can be used to hold landslides on unstable slopes, slopes and open pit walls.

The purpose of the invention is to reduce the material consumption of the structure and increase its carrying capacity.

FIG. 1 shows the KOHCTPVMTTIH predolonger slope,

general form; in fig. 2 shows section A-A in FIG. one.

The anti-landslide structure is located in landslide slope 1 across the movement of landslide 2 and buried below the surface of 3 slides into stable ground 4. The structures include pile rows 5 and 6, anchored in stable ground 4 and placed due to no land between landslide landslide thickness, and may include rows 7 and 8 vertical pre-tensioned anchors. The heads of the piles of anchors are combined in height 9. The rostver is made in width from the middle 10 and the outer sections 11 and 12, connected by the homologation elements 13.

The distance a between the rows of piles 5 and 6 is determined from the condition

Eon-nS-P (cospЈtgM) t sin "i) and tfMcoseJtgM t sinoi) + s

where Eop is the landslide pressure, which is 1 meter of width of the landslide;

n is the number of piles that fall into the landslide zone with a width of 1 meter;

S - ultimate shear force

cross section of one pile; P - average reduction force

across the width of the grillage to the creeping soil, ei is the angle of inclination of the surface

sliding the creep to the horizontal; - angle of internal friction

ground at the level of the sliding surface; c - specific soil adhesion

at the level of the sliding surface; fl is the average specific weight of the

ground;

h is the landslide thickness; the sign in brackets is accepted:

+ - at the location of the anti-landslide structure on the slope section, which has an ascending branch of the sliding surface;

- - at the location of the anti-landslide structure on the slope section having a downward branch of the sliding surface, provided that (, tj - sinrf) O,

and the width in the compacted part of the grillage is assigned from the condition

1 (0.8-0.9) (a-d),

where a is the distance between the axes of the pile series, d is the diameter of the piles.

A landslide construction is constructed as follows.

First, rows of piles 5 and 6 are arranged, the heads of which are joined by extreme sections 11 and 12, respectively, of the grillage 9. Then, the middle section 10 of the grillage 9 is concrete, leaving holes for the anchors 7 and 8 in case of their installation. Anchors 7 and 8 are arranged by drilling holes, placing them in them and injecting them. Section 10 of the grillage 9 is used to place the jacks, and thrust beams into which the jacks rest are attached to the corresponding valve releases from the extreme sections 11 and 12 of the grillage 9 and the section 10 is crimped, i.e. preloading piles or anchors 7, 8 if present.

After tensioning piles or anchors, i.e. after the calculated jacking of the jacks of section 10, it is monolithic with the extreme sections 11 and 12 of the 13 monolithing elements, such as welding of the valve outlets or shrinking with transverse anchors, followed by monolithing the gaps with concrete, after which the jacks are turned off.

The job of the design is to perceive the landslide pressure and transfer it to stable soils, while the soil of the landslide stratum is included in the work to hold the landslide. In the design, the soil mass works together with pile structures as a single pile soil creep wall, which keeps landslide masses from sliding down the slope. The ground involved in the work is enclosed between rows of piles, which are placed under the condition of non-pressing of the ground. This prevents the soil from loosening, as a result of which the stress state given to it is maintained. At the same time, the lifting water can flow freely through such a structure, which prevents the slope from watering.

The design provides a reduction of the material and labor-intensiveness of its manufacture.

Claims (1)

Invention Formula The anti-landslide structure, consisting of two rows of piles, which are united by a grillage and oriented perpendicular to the movement of the sliding ground, is in each of which piles are placed with a step that excludes the crushing of the soil between them, in order to reduce the material intensity of the structure and increasing its bearing capacity, the piles are fixed in a stable soil underlying the creeping soil, and a part of the rock cut is compressed into creeping soil in the middle width, and the distance between the rows of piles is determined by Eon-nS-P (cos iitg4 ± sinoi) (coscitgq ± sinoi) + s de aEopS is the distance between the axes of the piles; landslide pressure exerted by 1 running meter of landslide width; the number of piles that fall into the landslide zone with a width of 1 nor.MJ limiting effort of cutting off the cross section of one pile; sign + R - the effort of reduction of the average im width of the part rostverk p creeping soil; еЈ - the angle of inclination of the surface sliding the creep to the horizontal; - angle of internal friction soil at surface level JQ slip; U is the average specific gravity of the creep; h - landslide thickness; c is the specific soil adhesion in the jj level of the sliding surface, in brackets it is assumed: when the anti-landslide structure is located on a 20 portion of the slope having an upward branch of the sliding surface, - - at the location of the anti-landslide structure on the 25th part of the slope, which has a downward branch of the sliding surface, provided (cosoitgM1 - simO 0, 0 and the width of the part of the grillage compressed into the ground is assigned from the condition 1 (0.8 - 0.9) (a - d), where 1 is the width of the part compressed into the ground grillage, 5 a - the distance between the axes of the series piles, d - diameter piles. Editor M. Kelemesh Compiled by G. Gavrischuk Tehred M. Didyk Proofreader N. Korol