Abstract:
A foundation comprising (1) a cylindrical shell made of a cast-in-place concrete placed into a ring-like groove which is formed by excavation of the soil at the place of installation of the foundation, leaving a columnar soil located radially inward with respect to the ring-like groove without discharging the soil, and (2) an internal solidified soil formed by solidifying the columnar soil surrounded by the cylindrical shell with a chemical hardener, and a construction method therefor.
Abstract:
A ballast block has a uniquely designed framework consisting of lightweight, pre-fabricated, metal panel members and cross-bracing and elongated bracing members. The various components of the ballast block framework are compactly bundled and shipped to the end use location for assembly on-site. Once assembled, the ballast block framework is properly positioned on its permanent, end use location and concrete or equivalent ballast material is poured into the framework, completely filling its internal space. The ballast block can be sized and fabricated for the specific desired purpose.
Abstract:
An improvement for building perimeter-wall foundations is created by attaching galvanized-steel corrugated panels to an in-place structure. The freely hanging bottom edges of the panels, which have continuous deformation specific to the enhancement of bearing and anchorage within concrete, are cast in-situ with footing concrete, so becoming a cast-in-place perimeter-wall foundation, capable of residential-scale bearing and shear loadings. A load bearing pier support is included for load bearing supporting large or multi-unit modular structures.
Abstract:
This invention is a method and casing (1) for constructing a rigid structure upon the bottom of the water. The casing to be used is a lost pillar casing of particular shape. It is larger at the bottom than at a higher level and preferably is composed of flat plates formed into a polygonal cross sectional shape with similarity to a multiple sided pyramid. It can be combined with wall casings slit into recesses of the pillar casings. The wall casings can be double wall casings in which case concrete is filled therein and bulk stoney material is filled into the interior of the pillar casings or between the casings.
Abstract:
A seabed mound creating method suitable for a construction of a large scale offshore structure comprises the steps of setting up a plurality of sheet piles along the outer periphery of a mound creation region in a seabed area of soft ground to form an earth-retaining wall projecting from the seabed, and raising the ground level of the seabed within the earth-retaining wall by depositing soft soil into the earth-retaining wall to heap the deposited soil to a predetermined height. The method further comprises the step of implementing a ground improvement process to both the heaped-up soft soil and the soft ground of the seabed within the earth-retaining wall so that the ground improvement process is provided to a predetermined depth below the seabed, thus to form a seabed mound integral with the improved ground. The seabed mound may be provided at the upper portion with a projection area serving as a shear key with respect to a horizontal external force. Such a seabed mound can eliminate difficulty in supplying mound materials even when constructing a structure in an offshore area. When the ground improvement process is equally implemented to both a seabed ground and the heaped up soft soil, the seabed integrally formed with the improved ground can be created. Thus, a great shear strength due to such an integral structure can resist a horizontal external force, thereby ensuring high security.
Abstract:
A floor slab bridge structure is capable of enhancing the strength with which bridge girders and concrete bridge piers are rigidly joined so as to effectively suppress expansion and contraction, deflection, and distortion of the bridge girders, and to synergistically enhance the strength of connection concrete itself against the expansion and contraction, distortion, etc., to thereby be effective to prevent collapse of a bridge due to a large earthquake. Slab concrete is hammer-set between sides of respective bridge girders, which are spaced apart in a bridge width direction, along a length direction of the bridge girders. Connection concrete, in which bridge girder portions supported on bridge bottom surfaces of concrete bridge piers supporting the bridge girders are embedded, is additionally deposited on the bridge bottom surfaces to form a floor slab bridge structure constituting a rigid joining structure. The slab concrete and the concrete bridge piers are thus joined together through the connection concrete.
Abstract:
To repair a pair of adjacent corroded sheet pile coffer dam cells a vertical metal plate is welded to the joint between the adjacent arches of sheet piling in alignment with the diaphragm between the cells which is also connected to the joint. A precast, post-tensional concrete arch of approximately the same length and depth as the sheet pile arch is spaced outwardly of each sheet pile arch. Exposed reinforcing bars of the concrete arch are secured to an extension of the metal plate. An outer vertical plate bridges the gap between the outer corners of adjacent concrete arches. The space inside the outer plate and the arch joint is filled with grout (e.g., Tremied concrete or pressure grout). The spaces between the new concrete arches and the pre-existing sheet pile arches are also filled. The lateral forces from the fill behind the concrete arches are resisted by tension of the existing diaphragm between cells. Use of "deadmen" and other anchoring devices is obviated.