A foundation construction device for use in a construction device of a foundation (4) provided with a chain cutters (3) at the bottom during construction, comprising a fixed guiding device (1) and a composite device (2). The fixed guiding device (1) is composed of a fixed rack (1-1) and a guiding device (1-2). The composite device (2) comprises a chain cutter power transmission device (2-1), a spoil treatment device (2-2), and a rack (2-3). Also disclosed is a construction method for the foundation construction device.

The invention relates to a handling device for gripping and inserting a pile tube into a borehole in the ground to form a foundation pile, comprising a base frame, a gripping device for gripping and holding the pile tube, and a holding element for releasably connecting the base frame to a hoist, in particular a suspension rope. According to the invention, it is provided that at least one inlet device for supplying a curable medium is arranged on the base frame in an upper region and at least one outlet device for the curable medium to the pile tube is arranged in a lower region.

Proposed is a construction method for an underwater concrete block structure. The concrete block structure is formed by stacking a plurality of concrete blocks on a foundation concrete block structure by using a guide pipe, and a concrete column is formed by, before removing the guide pipe, inserting a concrete column forming set such as a waterproof membrane through the inside of the guide pipe, so that the waterproof membrane can be inserted conveniently and safely and the construction speed of the concrete block structure can be further improved.

The subject matter relates to a method and an apparatus for vibrating-in a foundation into a building ground by initiating vibrations generated by means of a vibrating device attached to the foundation, the vibrations causing liquefaction of the building ground so that the foundation penetrates the building ground.

Disclosed are a foundation having a chain cutter at the base during construction and a construction method of the same. A rock and soil conveying apparatus is provided inside or beside a foundation (1) having a chain cutter (3) at the base during construction, the base of the foundation (1) has a track (1-1), the chain cutter (3) is mounted on the track (1-1) during construction, and the chain cutter (3) is composed of a chain (3-1) and a rock and soil excavating cutter (3-2) fixed on the chain (3-1). A chain excavating apparatus mainly consists of the chain cutter (3) and a transmission apparatus, the transmission apparatus mainly being composed of a driving apparatus (4) and a sprocket (6). During construction, the driving apparatus (4) drives the chain cutter (3), the chain cutter (3) runs along the track (1-1), the cutter (3-2) at the base of the foundation (1) excavates rock and soil, which are removed by the rock and soil conveying apparatus, and the chain cutter (3) at the base of the foundation (1) and the foundation (1) descend together. The defects of the prior art are overcome, and since the foundation (1) itself has an excavating apparatus, the foundation (1) can be pre-formed in blocks at the factory, or can be constructed by pouring while descending in on-site fixed formwork, construction is simple, in particular waterproofing is especially good as descending is done as a whole, the construction period is short, and costs are low.

Disclosed are a foundation having a chain cutter at the base during construction and a construction method of the same. A rock and soil conveying apparatus is provided inside or beside a foundation (1) having a chain cutter (3) at the base during construction, the base of the foundation (1) has a track (1-1), the chain cutter (3) is mounted on the track (1-1) during construction, and the chain cutter (3) is composed of a chain (3-1) and a rock and soil excavating cutter (3-2) fixed on the chain (3-1). A chain excavating apparatus mainly consists of the chain cutter (3) and a transmission apparatus, the transmission apparatus mainly being composed of a driving apparatus (4) and a sprocket (6). During construction, the driving apparatus (4) drives the chain cutter (3), the chain cutter (3) runs along the track (1-1), the cutter (3-2) at the base of the foundation (1) excavates rock and soil, which are removed by the rock and soil conveying apparatus, and the chain cutter (3) at the base of the foundation (1) and the foundation (1) descend together. The defects of the prior art are overcome, and since the foundation (1) itself has an excavating apparatus, the foundation (1) can be pre-formed in blocks at the factory, or can be constructed by pouring while descending in on-site fixed formwork, construction is simple, in particular waterproofing is especially good as descending is done as a whole, the construction period is short, and costs are low.

The invention relates to an underwater drilling apparatus comprising a lowerable platform configured for setting down on a waterbody bottom, at least one support tube axially displaceable and rotatably mounted on the platform, at least one tubular drive arranged on the platform and configured for rotationally driving the support tube, in order to rotationally introduce the support tube into the waterbody bottom, and an in-hole drilling rig arranged in the support tube, wherein the in-hole drilling rig comprises: a rig base body, at least one clamping device for bracing and securing the in-hole drilling rig in the support tube, and a drill head which is axially displaceably and is rotatably mounted on the rig base body and can be rotationally driven by means of a drill drive. According to the invention, it is provided that, when the support tube is rotationally driven, the in-hole drilling rig is arranged in the support tube and is axially clamped thereto.

The invention relates to an assembly (1) comprising: a hollow component (2) with a component opening (3), a cover (4), by means of which the component opening (3) is closed, and a fan (5) for ventilating the interior (6) of the component (2), wherein the fan (5) is pivotally secured to the cover (4). The component opening of the component (2) can be closed by the cover (4) so that the interior (6) of the component (2) is protected against external influences. The formation of mold in the interior (6) of the component (2) can be prevented by means of the fan (5). Because the fan (5) is pivotally held on the cover (4), the interior (6) of the component (2) is particularly readily accessible.

A subsea foundation comprises at least one mudmat having a top panel and a skirt depending from the top panel to be embedded into seabed soil. At least one auxiliary plate is supported by the mudmat, the plate being deployable downwardly like a guillotine blade from a raised, retracted position in which the plate is held above a lower edge of the skirt into a lowered, deployed position in which the plate extends beneath the lower edge of the skirt to be embedded further into the seabed soil. The foundation may be used to restrict movement of an elongate subsea element, such as a pipeline, relative to the seabed.

A monopile foundation in the form of a cylindrical steel pipe that can be driven into the bottom of a water basin. The monopole foundation includes a bottom area, and an area above the bottom area. The area above the bottom includes a connection flange, and a tight membrane consisting of a bottom panel and of a top panel with at least one reinforcing rib, and filling between the panels. Above the membrane, the monopile foundation contains dry functional space between the membrane and the top connection flange, while in the bottom area of the monopile foundation, below the bottom panel of the membrane, there are openings in the cylindrical steel pipe of the monopile foundation. The space between the bottom panel of the membrane and the top edge of the outlet openings is filled by an air cushion.