• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SU1819309A3
    申请号:SU4889202
    申请日:1990-12-10
    公开日:1993-05-30
    发明作者:
    申请人:
    IPC主号:
    专利说明:

    The invention relates to the field of construction equipment and can be used to create pile foundations in the construction and reconstruction of buildings and structures mainly in cramped conditions and unstable soils.
    The aim of the invention is to increase the bearing capacity of piles.
    The purpose of the invention is also achieved by the fact that in the reinforcing cage of a printed pile, including longitudinal and transverse reinforcement, part of the transverse reinforcement is made in the form of radial ribs placed in diametrical planes in tiers along the length of the carcass. The presence of radial ribs limits the radial vibration of the reinforcing cage, which increases the intensity of impact on the soil at the base of the pile, and therefore its compaction.
    In FIG. 1 shows a section of a pile during its molding; in FIG. 2 - the same, in the process of ramming part of the concrete mixture into the soil of the well; in FIG. 3 - the same, after the formation of the pile shaft; in FIG. 4 is a section AA in FIG. 3 (concrete mix conditionally not shown).
    The claimed method is implemented as follows.
    A well with fortified walls is created in the soil by any of the known methods. The walls of the well can be strengthened by firing or (as in the case under consideration) casing 1 (Fig. 1). The pipe is immersed in the ground with an open end in any known manner. Periodically by
    1819309 AZ As a result of immersion or after immersion to the level of the sole of the pile, the pipe is cleaned of soil. At the same time, layer 2 of the soil loosened during cleaning remains in the face, and under it is the unconsolidated soil of the base. The reinforcing cage 4 is installed in the well (casing). The installation of the reinforcing cage 4 is carried out by means of a vibro-shock mechanism attached to the frame 4 by means of a transition device 12. After installing the reinforcing casing 4, the casing 1 is completely filled with concrete mixture 10 and the reinforcing cage 4 is subjected to axial vibration shock. Under the influence of vibration shock, the concrete mixture 10 is compacted and rammed into the soil of the base.
    In FIG. 2 shows the immersion of the reinforcing cage 4 in a portion of concrete mixture 3 with a height of 2-3 diameters of the casing 1, laid before the installation of the reinforcing cage 4.
    When creating piles in water-saturated soils and intensive water flow into the casing, the dry concrete mixture is loaded under water to a height of 2-3 casing diameters in a sealed soft shell before installing the reinforcing cage. When the reinforcing cage is immersed under vibration shock, the soft shell is destroyed, and the dry concrete mixture is moistened with surrounding water. Upon further exposure to the reinforcing cage by vibro-impact load, the concrete mixture is rammed into the base soil, as a result of which a concrete plug is formed that prevents further penetration of groundwater into the casing pipe. The remaining water is pumped out of the pipe, the trunk’s pile is concreted.
    The reinforcing cage 4 may consist of a Central perforated pipe 5 (Fig. 3), a head 6, overlapping part of the cross section of the casing 1 and made, for example, in the form of an annular washer, coaxially placed on the lower end of the pipe 5, and radial ribs 7, placed in diametric planes in tiers along the length of the central pipe 5. The Central pipe 5 for ease of installation in cramped conditions can be made of separate sections. In this case, the ribs 7 are located at the junction 8 of the pipe sections 5, reinforcing it. The holes 9 in the wall of the pipe 5 are placed evenly on its surface and can have a round or oval shape elongated along the longitudinal axis of the pipe 5. The distance between the ribs 7 located in the same plane is selected so as to ensure the stability of the central pipe 5 when exposed to an impact load. The gap between the ribs 7 and the inner surface of the pipe 1 determines the amplitude of the transverse vibrations of the reinforcing cage 4. After installing the reinforcing cage 4 and ramming, where necessary, parts of the concrete mixture 3 (Fig. 2) in the soil of the base pipe 1 is completely filled with concrete mixture 10 and affect the reinforcing cage 4 axial vibration shock.
    Under the influence of the shock load, axial and transverse vibrations of the reinforcing cage 4 arise. The amplitude of the transverse vibrations of the cage 4 is determined by the gaps between the ribs 7 and the inner surface of the pipe 1 and the distance between the ribs 7 along the axis of the pile.
    Axial and transverse vibrations of the frame 4 compact the concrete mixture 10. The presence of holes 9 in the central pipe 5 increases the intensity of dynamic effects on the concrete mixture, increases the uniformity and density of the concrete mixture. At the same time, under the influence of shock load, the reinforcing cage 4 acts on a portion of concrete mixture 3 located under the head 6. The presence of a head 6, overlapping part of the cross-section of the casing 1, increases the resistance to the introduction of the frame 4 into the portion of the concrete mixture 3, which leads to the fact that part of the concrete 3 is forced into the space above the head. at a pressure exceeding the pressure of the column of concrete mixture 10, and the remaining part of the concrete mixture 3 is compacted and rammed into loosened soil 2, compacting it, as well as the adjacent mass of natural soil.
    At the base of the pile, a compacted core 11 is formed, which increases its bearing capacity.
    One of the possible options for the implementation of the proposed method in weak water-saturated soils, based on loose coarse soil.
    A casing pipe of 0325 mm and a length of 14.0 m is immersed in the ground with a pneumatic hammer SO-166 (energy of a single impact of 1000 J). After immersion of the pipe before failure (cessation of residual movements), it is cleaned of the soil with a pneumatic punch And P-4603 (energy of a single blow of 250 J). The pipe is cleaned to a height of 13.5 m, i.e. An earth plug 0.5 m high is left in the pipe. After filling the pipe to a height of 0.6 m with dry concrete mix, loaded in sealed plastic bags under the water entering the pipe, a reinforcing cage is installed in the form of a central perforated pipe 0159 mm with ribs and a head .
    With a pneumatic punch SO-134 (energy of a single impact of 500 J), the reinforcing cage 5 cas is immersed until failure occurs and further exposure to the reinforcing cage with axial vibration shock allows you to ram a part of the concrete into the ground and compact the soil plug. After this 10, water is pumped out of the pipe.
    The casing and the central perforated pipe of the reinforcing cage are filled with concrete. After laying the concrete mixture, the pneumatic punch is included in the work for 5-10 minutes.
    The impact of the axial vibrational load on the reinforcing cage, and through it on the concrete mixture, allows you to evenly and efficiently compact the entire concrete column filling the casing and compact the soil at the base of the pile.
    This method provides a reduction in the volume and timing of work, which is especially important during the reconstruction of existing enterprises and operating residential buildings.
    The application of the proposed method can increase the bearing capacity of piles by 20-40%. thirty
    权利要求:
    Claims (4)
    [1]
    Claim
    1. The method of erecting a printed pile, including the formation of a well with reinforced walls, installing a reinforcing cage, laying and compaction of the concrete mixture, characterized in that, in order to increase the bearing capacity of the piles, the concrete mixture is compacted simultaneously with the compaction of the surrounding soil by acting on the reinforcing cage axial vibration shock.
    [2]
    2. The method of pop. 1, characterized in that part of the concrete mixture is laid in the well before installing the reinforcing cage.
    [3]
    3. The method according to p. 2, characterized in that a concrete mixture is used as a concrete mixture.
    [4]
    4. Reinforcing frame of a stuffed pile, including longitudinal and transverse reinforcement, characterized in that, in order to increase the bearing capacity of the pile, part of the transverse reinforcement is made in the form of radial ribs placed in diametrical planes in tiers along the length of the frame.
    Figure 1
    FIG. 2
    A-a
    Figure 4
    Editor Compiled by V. GrigorashchenkoTehred M. Morgenthal Corrector E. Papp
    Order 1951 Circulation Subscription
    VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology
    113035, Moscow, Zh-35, Raushskaya nab., 4/5
    Production and Publishing Plant Patent, Uzhgorod, Gagarin St. 101
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    同族专利:
    公开号 | 公开日
    RU1819309C|1993-05-30|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SU4889202|RU1819309C|1990-12-10|1990-12-10|Method for construction of cast-in-place pile and reinforcing cage of cast-in-place pile|SU4889202| RU1819309C|1990-12-10|1990-12-10|Method for construction of cast-in-place pile and reinforcing cage of cast-in-place pile|
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