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Means of increasing the effectiveness and quality of foundations constructed of cast-in-place piles

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Conclusions

1. The type SO-2, SO-1200, and MBS-1.7 apparatus currently used to drill holes for cast-in-place piles provide for high drilling productivity, but do not permit complete cleaning of the base of the hole. It is necessary to fit their working devices with attachments to clean the hole bottoms and taper sections.

2. The condition of the face of the hole prior to placement of the concrete should be inspected and corected. For this purpose, it is necessary to develop attachments or devices to check the condition of the hole bottoms.

3. In developing plans for the production of work, it should be stipulated that the concrete be delivered into the hole directly from transit-mix trucks.

4. In dry stable soils, holes can be concreted by the free-fall method with concrete having a slump of 10–12 cm and a cement factor of 250–300 kg per 1 m3 of concrete.

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Literature cited

  1. 1.

    I. L. Sapir, M. D. Tul'chinskii, and B. E. Levin, "Designing pile foundations from cast-in-place piles for structures of the Kama truck plant," in: Cast-in-Place Piles in Industrial Construction [in Russian], Stroiizdat, Moscow (1974).

  2. 2.

    "Temporary technical specifications for the production and procedures of work on the installation of cast-in-place piles at construction sites of the Kama truck plant," Naberezhnye Chelny (1972).

  3. 3.

    B. V. Bakholdin, V. M. Mamonov, A. G. Oskolkov, V. B. Safonov, and I. I. Khabibullin, "Improvement in the design methods used for cast-in-place piles and experimental confirmation of the bearing capacity of cast-in-place piles used in the construction of the Kama truck plant," in: Cast-in-Place Piles in Industrial Construction [in Russian], Stroiizdat, Moscow (1974).

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Additional information

Scientific-Research Station of the All-Union Lenin Order S. Ya. Zhuk Scientific-Research Institute for Design and Exploration (NIC Gidroproekta). Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 6, pp. 10–14, November–December, 1976.

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Ermoshkin, P.M., Saikina, T.V. Means of increasing the effectiveness and quality of foundations constructed of cast-in-place piles. Soil Mech Found Eng 13, 385–392 (1976). https://doi.org/10.1007/BF01706706

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Keywords

  • Drilling
  • Civil Engineer
  • Structural Foundation
  • Hydraulic Engineer
  • Stable Soil