The foundation for a cylindrical tank

The invention relates to the construction and can be used in the construction of tank farms for storage of liquid products

The invention relates to the field of construction and can be used in the device walls fencing during the construction of the tank on a solid, for example, half-rock soils

The invention relates to the field of construction, namely, the foundations of the tanks walls and fences

The invention relates to industrial and civil construction and can be effectively used in the construction of roads, airfields, foundations for various structures, as well as in the construction of any structures on soft soils

Foundation includes ring-shaped foundation member located under reservoir walls and base formed as a row of piles driven in ground and connected by ring-shaped end cross having cuts. Reservoir bottom center includes plate with levers located in ring-shaped end cross cuts and connected to ring-shaped foundation member by rods.

Method involves preparing building site and ground base; mounting reservoir and performing hydraulic tests thereof. Reservoir mounting is performed in several stages. At the first stage reservoir is built without stationary metal bottom, has projected edges and is provided with temporary flexible bottom air-tightly pressed against projected edges with the use of pneumatic system. After that preliminary hydraulic tests are performed by filling reservoir with water. At the second stage temporary flexible bottom is demounted after complete ground base compaction, deformed ground base is smoothed up to reaching design mark by filling the formed cavity with filling material. Then waterproofing material is applied to smoothed base, permanent metal bottom is formed and the ready vessel is subjected to final hydraulic tests.

Foundation comprises earth-fill pad, water-tight layer arranged below the pad, drainage system consisted of a number of pipelines arranged in earth-fill pad body. Trench filled with interchangeable filtering material is dug out along foundation perimeter. Watertight layer is inclined under the earth-fill pad and has upper end of hollow square shape so that the hollow square is inclined towards straight channel adapted to accumulate rain water and located in lower pad part. The straight channel is communicated with drainage vessel. Well with controlled gate is formed in front of the drainage vessel. Drainage system pipelines are formed of perforated pipelines communicated one with another and arranged along a circle and inside it.

Foundation includes mattress panel, which connects vertical and inclined piles. Vertical piles are uniformly distributed along large circle at mattress edge and along minor circle defined by mattress center. Inclined piles are grouped in pairs and arranged in vertical plane one above another. Each pair of inclined piles extending from mattress edge is connected with each vertical pile of minor circle in lower part thereof. Each pair of inclined piles extending from mattress center is connected with vertical pile of large circle in lower part thereof.

Reservoir foundation comprises bearing panel laid on ground bed. The bearing panel has flat annular conical part having thickness increasing towards panel center and central conical part. Spring means are arranged between the annular conical part and central one. Spring means touch reinforced concrete ring. Central conical part is made as a cone facing upwards and composed of several members pivotally connected with each other in tops thereof and resting upon reinforced concrete ring. The members are connected with each other by flexible inserts.

Foundation comprises upper bearing platform, lower bearing platform and connection members arranged in-between. Upper platform has diameter less than that of lower platform. Upper platform comprises conical upper surface. Moving connection members are made as horizontal and vertical compensators. Lower bearing platform is made as a box with flat bottom and vertical side walls. Apex of upper bearing platform cone faces upwards. Horizontal compensators are arranged between outer perimeter of upper platform and walls of lower platform box. Vertical compensators are located between upper and lower bearing platforms. Number of vertical compensators per each unit area decreases from platform perimeter to center.

Tank base comprises round support slab bearing upon ground bed and supports. The supports are distributed along outermost support slab perimeter and are made as conical ground piles having side surfaces defined by generators inclined at angle equal to natural ground slope of the pile. The supports are grouped in two rows along slab perimeter. Two rows of flat slabs are laid on ground pile. The slabs are welded with each other and grouted in top parts thereof.

Invention concerns construction, particularly construction of steel vertical tanks for oil product storage on soft and highly compressible ground. Oil product storage tank is mounted on basement. Tank is made in the form of hollow tapered cone or tapered pyramid with top and bottom covered by caps, with longitudinal and transverse webbing inside. Tank is attached with its top to base plate by ties. The base plate is made in the form of half-circle reinforced concrete segments interconnected by welding laid on ground bedding covered with concrete layer, and a pile is rammed into hole of each base plate segment.

Elasto-yielding support for high-volume thermally loaded items comprises two support plates, between which there are the following serially installed components - cylindrical race with a set of plate springs, diaphragm and anti-friction material. One of support plates has the possibility to adjust its height. Working stroke of plate springs set is calibrated in units of force in compliance with their rigidity.

Construction method of reservoir foundation base involves uniform location of vertical piles in large and small circles. First, a trench is excavated, piles are lowered to the depth equal to where d - circle diametre, n - number of circles of arrangement of piles, N - circle No., starting from the central one and a blanket is made for foundation and bottom of reservoir; at that, distance between circles of pile arrangement is equal, and distance between piles is equal to diametre of the pile itself.