SU821655A1 - Method of erecting pile foundation on earth-fill areas - Google Patents

Description

The invention relates to foundation engineering, in particular to a method of construction of a pile foundation in the reclaimed territories in permafrost conditions.

There is a method of constructing a pile foundation, including driving a pile to the design level and crushing the washer with through cavities to a depth exceeding the thickness of the washer, cleaning the washer from the ground, followed by filling the joint of the piles with the washer with hardening material and filling the soil onto the surface of the washer [1].

The disadvantage of this method is that it cannot be used during construction in reclaimed areas.

Closest to the proposed invention in terms of technical nature and the achieved result is a method of erecting a pile foundation in a washed-up area ^, including deepening a tubular pile into a naturally composed soil, placing washers on a pile at a level of naturally composed soil, monolizing a washer with a pile and alluvial soil [212

However, in the construction in permafrost conditions resulting from thawing and sealing layer of natural soil caused inwash, washers between the sole and the ground clearance arises, ₅ sistent excluded from work washer, which adversely affect the load bearing capacity.

The purpose of the invention is to increase the bearing capacity of the foundation, erected in permafrost soils by eliminating the formation of a gap between the sole of the washer and the soil of natural build-up during washing up.

This goal is achieved by the fact that in the known method of erecting a pile foundation in reclaimed areas, 15 including deepening the tubular pile into the soil of natural composition, placing the puck on the pile at the level of the soil of natural composition, monopolizing the washer with the pile and flooding the soil, monoling the washer after the pile washing the soil by filling with a hardening solution the cavity of the pile and the cavity connected with it, formed in the body of the washer.

In FIG. 1 shows a pile with a washer before washing up the soil; in FIG. 2 - the same after washing up the soil; in FIG. 3 - section A — A in FIG. 2.

The construction of the pile foundation in reclaimed areas by a known method is as follows.

Tubular pile 1 having transverse through channels 2, is immersed in the soil of natural composition 3 with a mark A at the estimated depth h. The lower part 4 of the pile below the channels 2 can be made continuous. A reinforced concrete washer 5 is freely put on the pile 1. The washer 5 is equipped with a safety apron 6 and sealing cuffs 7 to prevent entrained soil 8 from getting into the cavity of the pile. 8. In the washer 5 on its inner planes there are strips 9 for filling · washers 5 with pile 1. After installation of the washer 5 wash the soil 8 to the desired level B. After washing, a natural compaction of the washed soil and water drainage occur. The washer 5, regardless of the pile 1, compacts the thawed soil of natural composition 3 underneath with its own weight and the weight of the soil 8 washed on it and plunges down from mark A to mark C (to a depth of h) to its stable position. The strips 9 in the washer 5 and the channels 2 of the pile 1 are combined, after which the hardening solution 10 is heated in the internal cavity of the piles 1 of the channels 2 and the strips 9 of the washer 5. After the mortar 10 is properly hardened, the pile 1 washed down with soil 8, monolized in one piece with the washer 5 ready to download.

The construction of a pile foundation in the reclaimed areas ensures the creation of an appropriate soil density under the washer, the formation of a gap under it due to thawing of the soil and sediment is prevented, and the bearing capacity of the pile foundation is increased.

Claims (2)

(54) METHOD FOR CONSTRUCTION OF PILED FOUNDATION IN NAMABLE TERRITORIES FIG. I shows a pile with a washer until alluvium is washed in; in fig. 2 - the same, after alluvium; in fig. 3 shows section A-A in FIG. 2. The construction of the pile foundation in the washed-in areas by a known method is carried out as follows. The tubular pile 1, having transverse through channels 2, is immersed in the soil of natural composition 3 with mark A to the calculated depth h. The bottom part 4 of the pile below channels 2 can be made solid. Reinforced washer 5 is freely put on the pile 1. The washer 5 is equipped with a safety apron 6 and sealing cuffs 7 to prevent the soil 1 being washed in the pile 1 cavity 8. In case 5 there are strips 9 on the inside planes to embed the washer 5 with the pile 1. After Installations of the washer 5 wash the soil 8 to the required mark B. After the wash-in, natural compaction of the washed soil and drainage of water occur. The washer 5, regardless of the pile 1, compresses the degrading soil of natural composition 3 under its own weight and the weight of the soil washed in it 8 and sinks down from level A to level C (to a depth h) to its stable position. The strips 9 in the washer 5 and the channels 2 of the pile 1 are combined, after which the solid solution 10 is heated into the internal cavity of the pile 1, channels 2 and strips 9 of the clamp 5, after appropriate hardening of the solution 10, washed with the soil 8, 1 is integral with the washer 5 ready to download. The construction of the pile foundation in the washed-in areas ensures the creation of an adequate density of the soil under the washer, prevents the formation of a gap under it due to the thawing of the soil and precipitation, and increases the bearing capacity of the pile foundation. The invention of the method of erection of a pile foundation in washed areas, including the deepening of a tubular pile into the soil of natural folding, placed on the pile of washers on the soil level of natural folding, homolithing of the tongue with the pile, and washing of the soil, characterized in that erected in permafrost soils due to the exclusion of the formation of a gap between the basement and the natural build-up in case of alluvial wetting, the clearance with the pile is carried out follows alluvium soil hardening solution by filling the cavity of the pile and communicating with its cavity formed in the washer body. Sources of information taken into account in the examination 1. Metelyuk N. S. and others. Piles and pile foundations. Reference book, Kiev, “Budlivnik, 1977, p. 30-31. 2. Recommendations for the design and installation of pile foundations in the washed-in areas (before washing in the soil). Kiev, Research Institute of Building Constructions Gosstro USSR, 1974, p. 4-6. i T .. - iC X -: /; ..-;:. v--. -;:; /. V .; -L -.- luui. XV iCrX 7--,, -, I i. A i k k t (i g.-.   . t „.. I. ,, , -one. . I   one c. . "" . t V,. (, 05 -G-GT T