A box type duct with circumferential obtuse angle connection. Unit plates respectively located on the upper, lower and two side surfaces are spliced in the circumferential direction to form a unit pipe section, and the unit pipe sections are spliced in the axial direction to form a box type duct; wherein the unit plate is an arc-shaped corrugated plate arched to the outside of the box type duct, and the adjacent unit plates form an obtuse angle of circumferential connection. The cross section of the duct is in an approximately rectangular box shape, so the utilization ratio of clearance of the duct is high; the unit plate adopts an arc-shaped structure, and by utilizing the pipe-soil joint stressing principle, the strength and bearing capacity of the overall structure are maximized; and the box type duct adopts flat flange or angle steel flange connection in the circumferential direction.

A retaining wall system includes a plurality of large mass retaining blocks formed with vertically oriented openings passing therethrough for the installation of micro-pile soldier piles. The retaining blocks can be formed of pre-cast concrete and stacked vertically so that the vertical openings are aligned for the installation of micro-pile soldier piles through the stacked retaining blocks and into the bedrock below the retaining blocks. The micro-pile soldier piles can include a steel casing that is installed through the aligned vertical openings to terminate at the bedrock with grout filling the steel casing except for optional reinforcement. The retaining blocks can be formed with cutout key openings that allow concrete to be inserted to provide a key interlock between adjacent retaining blocks to further stabilize the retaining wall. The retaining wall can also include a row of waler blocks that incorporate a pair of tie-back anchors for each waler block.

A beam pumping unit includes an integrated base assembly that has a precast concrete pad and a support base partially embedded within the precast concrete pad. The beam pumping unit further includes a pedestal supported by the support base and a Samson post supported by the support base. Also disclosed is a method for making and assembling a beam pumping unit near a wellhead. The method includes the steps of producing an integrated base assembly that has a support base within a concrete pad, placing the integrated base assembly near the wellhead, and securing a Samson post to the integrated base assembly.

The Open End Friction Pile comprises of four steel plates, four brackets, and one driving head. The steel plates have a first bend line and a second bend line that are equidistant from a distal end. The first bend line and second bend line of the steel plates are equidistant from each other creating a center portion. The brackets have a first bend line and a second bend line that are equidistant from a distal end. The first bend line and second bend line of the brackets are equidistant from each other creating a center portion. The bracket has a third bend line along the center portion. One bracket is connected to one steel plate along the distal ends and center portion. All four steel plates and four brackets concurrently connect along the distal ends to form two open-ends. A driving head is connected covering the top open-end.

Provided are a reinforcing method and a reinforcing structure for a manhole having a neck part in a position shifted from the middle part of an upper slab which allow the buried manhole to be reinforced sufficiently against stress inflicted thereon while reducing the operation and material costs involved in the reinforcement. The manhole reinforcing method according to the invention is a method for reinforcing a manhole including a rectangular trunk part having an upper slab, a sidewall, and a lower slab and a neck part provided in a position shifted from a middle part of the upper slab of the trunk part, the method includes providing a strip-shaped reinforcing member of reinforced fiber at the upper slab and the lower slab while refraining from providing the strip-shaped reinforcing member at the sidewall, and fixing an upper part of the sidewall and the upper slab and a lower part of the sidewall and the lower slab each by a reinforcing member at the middle part of the sidewall in the longitudinal direction of the trunk part.

A bridge support system includes a support embankment formed from at least one light-weight material. The support embankment is arranged to support and be positioned under a footing of a bridge structure. A restraining system is operatively connected to the support embankment. The restraining system includes cross-members which are angularly offset from each other and arranged to limit at least one of lateral and vertical movement of the support embankment under high levels of excitation.

The open end friction pile comprises of four steel plates, four brackets, and one driving head. The steel plates have a first bend line and a second bend line that are equidistant from a distal end. The first bend line and second bend line of the steel plates are equidistant from each other creating a center portion. The brackets have a first bend line and a second bend line that are equidistant from a distal end. The first bend line and second bend line of the brackets are equidistant from each other creating a center portion. The bracket has a third bend line along the center portion. One bracket is connected to one steel plate along the distal ends and center portion. All four steel plates and four brackets concurrently connect along the distal ends to form two open-ends. A driving head is connected covering the top open-end.

An edge protection safety bund system (10) for use in connection with a rock bund made of rock fill. The edge protection safety bund system (10) comprises a bund module (12) having a barrier wall (14) and a base plate (16). The bund module (12) is preferably one of a plurality of bund modules (12) arranged side by side to form an extended barrier wall (14). The barrier wall (14) of each module (12) extends substantially perpendicularly upwards from the base plate (16), and a support web (18) extends at an angle from a rear face of the barrier wall (14) to an upper surface of the base plate (16). In use, when rock fill is dumped onto the rear of the bund modules (12), and allowed to flow back to its natural angle of repose behind the barrier walls (14), it creates a rock bund (20) with a front face formed by the extended barrier wall (14).

A reinforcement for strengthening soil areas, ground surfaces, and in particular subsoils, and earthwork structures includes at least one reinforcement element, preferably a plurality of reinforcement elements which, in particular, intersect at an angle, wherein the at least one reinforcement element includes at least one actuator by way of which a property of the reinforcement element can be changed, and in particular at least temporarily changed. A structure on a subsoil, and in particular an earthwork structure includes the aforementioned reinforcement, and a method is provided for operating the aforementioned reinforcement.

A manhole is provided with a base plate, manhole walls, and a cover plate for covering the manhole. The manhole walls include of a plurality of grid-like wall elements arranged in rows one above the other and selectable from a modular system. A part of the grid-like wall elements has at least one conduit insertion opening so that the position, number, and size of conduit insertions into the manhole walls are freely selectable by arranging the grid-like wall elements. Several circumferential connecting frames are provided, which are arranged at different heights, and the grid-like wall elements are each connected on their top sides and bottom sides to one of the connecting frames.