| 摘要 |
An improved precast concrete beam element, useful as a continuous bearing structural foundation member supporting wall and floor slab loads in soil, has a unique shape and includes a bearing surface for spreading vertical loads into the soil and a wall section having a height sufficient to place the bearing surface at a specified bearing depth in the soil. Optionally, the precast beam element also includes a formed-in notch to serve as a block ledge to facilitate weathertight wall installation. By integrating both the slab form edge and the wall ledge, the beam element eliminates the need for field forming. The beam element is manufactured offsite in a mold capable of changing dimension to cast elements with differing bearing heights and differing wall thicknesses as soil and loading conditions require. Installation of the beam element involves simple suspension of the beam element above an excavated trench such that a gap is formed between the bottom and sides of the trench and the surfaces of the beam element. As the beam element is suspended above the trench, a flowable fill material is poured into the trench to fill the gap. When the flowable fill material hardens, the beam element is locked into place, achieving full bearing and lateral stability.
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