- Under the moraine - mid-Quaternary fluvioglacial deposits fQ II od, forming a non-uniform thickne

In SNIP 2.02.03-85 Pile foundations, The updated edition (SP 24.13330.2011) [4], which is valid from May 20, 20011 years, included a pile-RHS manufactured using electric discharge current pulses (RHS).
One of the first high-rise (36 floors) on stilts, RIT was built by specialists "Monarch and C" in the mainstream of the river Ramenka, fill in the construction of the metro station "Vernadsky Prospekt." Ground conditions for construction have been very difficult. In the process of engineering and geological surveys, it has been allocated 33 geotechnical elements (IGE). 3 ... 6 m below the bottom of the pit underlain bulk tQ IV neslezhavshiesya water-saturated clay and loam, with the remnants of debris. In these soils was an overflow reservoir for the passage rational konvektomat of flood water from the pond, introduced by a bridge width of 8 meters from the pit, the bottom of which was at 2 m below the water surface in the pond. The collector wanted to keep to the completion of the bypass. The following occur:
- Under the moraine - mid-Quaternary fluvioglacial deposits fQ II od, forming a non-uniform thickness, facies (IGE15 ... 21) places rational konvektomat reaches 3.8 m, folded rational konvektomat loam, sandy loam, sandy to pebbly differences saturated soils (water pressure of up to 10 m);
Because of the presence of soil under the slab neslezhavshihsya, the entire load of the building rational konvektomat should be seen piles, so we were provided bored piles Ø 1 m, length rational konvektomat 24 and 22 m. Until these devices should make piles above the overflow reservoir that year delays the basic building -montazhnyh works.
Therefore, a new project using the RHS-pile bearing capacity for the calculated ground 150 m / pile. For high-rise housing weight 128,000 tons were provided 899 piles RIT-21 m long with a diameter rational konvektomat of 320 mm drilling, combined rational konvektomat stove area of 1570 m 2 (Fig. 2) and a thickness of 2.2 m. Reinforcement piles performed skeletons of two sections, abutting overlapping . The upper section 6Ø28 A500S, lower 6Ø25.
In March-June 2002 produced 899 piles RIT-eight of them have experienced the static load on the pinch GOST5686-94 [5]. Under load - 216 ton sludge piles stabilized in the range 13.52 ... 18.46 mm, the residual deformation after unloading amounted to 1.77 ... 5.90 mm, indicating that the joint work of the soil and pile-RIT almost elastic stage. Typical test schedule is shown in Fig. 3.
Within two years after construction NIIOSP them. NM Gersevanov monitored deformations: precipitation stabilized before rational konvektomat reaching 4 cm, and the banks did not exceed rational konvektomat 0.0006, which is significantly rational konvektomat less than the limits for these buildings.
Fig. 3. Graph of rainfall S of load P-piles RIT 101; 190; 779; 824, with a load of 216 tons stabilization deformations occur in the sediment rational konvektomat piles 13,5-18,46 mm residue after removal of the load was 1,77-5,90 mm.
Another example. Residential rational konvektomat complex on the street. Davydkovskaya, rational konvektomat d.19A built specialists "Mosstroyrekonstruktsiya" rational konvektomat on stilts in 1370, RIT diameter of 320 mm and a length of 19 m. Reducing the cost of pile foundation for jumping exceeded 22.8 million. Rubles, compared with the price of the next challenger.
The following example. Administrative and office complex "Falcon mountain" (st. Semyonovskaya 21) - the first skyscraper, built on the program rational konvektomat "New rational konvektomat Ring of Moscow". 33 story building built in 2007 by experts "Montazhspetsstroy" on stilts 502 RHS-diameter 320 mm, length 18 ... 26 m.
Fig. 7. Piling-RIT 24 meters in length, with a diameter of 320 mm (top photo device first pile-RIT, photo taken on board the pit in the middle hitting drill rig to the drilling) and a general rational konvektomat view of the constructed 42-storey building on the avenue Marshal Zhukov, d. 45 (photo below).
In the floodplain Setun built a complex of buildings of the Moscow School of Management (LNA "Skolkovo"). Ground conditions are very complex. The project envisages the 1347 RIT-piles in length from 19 to 27 m, a diameter of 320 mm, bearing capacity on the ground to 150 mc / pile. Due to the difficult conditions of production subcontractors, carrying pile foundation, has made an additional 34 piles, piles doubling in performance which occurred at a subcontractor slightest doubt.
Fig. 8. Fragment pile field of RIT-piles produced in sweat, ie piles located below the head surface with which piles were manufactured. In the photo to fix the moment felling pile heads up to 1.4 m in the process of excavation, rational konvektomat 2007
Fig. 10. Completion of the unique buildings LNA, 5 June 2010, a view of one of the buildings in the direction of Moscow. Body length of 130 m and a weight of more than 25,000 tons, with consoles length 28 m, based on two staircase-lift block, the central span of more than 65 m, at the bottom of each staircase-lift block bushes pile 80 piles RIT-carrying rational konvektomat capacity to 150 tons pile.
According to the task load on the pile should be 186,450 ton. The actual rational konvektomat weight of the complex of buildings with the foundation slab was more than 230,000 ton. General