Embodiments of the present disclosure generally relate to a pumping unit base and methods for operating with the pumping unit base. The pumping unit base may include a plurality of driven piles installed in the ground, and a metal platform fixedly attached to the plurality of driven piles, wherein the metal platform is positioned above the ground. The metal platform may be removed from the driven piles and reinstalled to the driven piles.

A cut-and-cover concrete tunnel structure (10) is provided with a lower concrete part (2) and an upper concrete or steel part (3) of the structure. The lower part (2) of the structure is constructed in unreinforced concrete, poured directly against and supported by a partly horizontal, partly inclined and approximately circular or elliptically shaped excavation surface (6). The upper part (3) is arch shaped, constructed in reinforced (cast-in-place or precast) concrete or steel, and is of circular, elliptical or partly elliptical shape. This cut-and-cover structure allows a more efficient and less costly tunnel construction.

Geocell structures stabilize water body shorelines and beds, slopes and retaining wall bridge abutments in such areas of construction as the oil and gas, transport and hydraulic engineering industries, amongst others. A blank for producing a weld-free geocell is made from a polymer sheet material having incisions therein in the form of segments of parallel lines. Adjacent incisions in the same row have a distance S between the ends thereof and the relationship S/L=K1, where K1 is from 0.1 to 0.5. The incisions of adjacent rows are at a distance D from each other and have the relationship D/L=K2, where K2 is from 0.1 to 0.7. At the ends of the incisions, there are openings which are oval or circular in shape. A weld-free geocell includes at least one blank stretched in a direction perpendicular to the lines of the incisions to form a three-dimensional cellular structure.

Systems and methods to provide pressed aggregate-filled cavities for improving ground stiffness and uniformity are disclosed. According to an aspect, a method includes using a mechanism to press into a ground surface in a substantially downward direction to create a concavity. The method also includes substantially or completely filling the concavity with unstabilized or chemically stabilized aggregate, soil, or sand. Further, the method includes using the mechanism to press the aggregate within the concavity to achieve a desired ground stiffness.

Embodiments of the present disclosure are directed to reinforced syntactic structures and methods of forming the same to encase an underlying structural substrate for remediation and/or improve structural stability. The reinforced syntactic structure includes an underlying structural substrate having an outer surface and at least one reinforcement shell. The reinforcement shell is formed from at least one syntactic foam shell layer encasing at least a portion of the outer surface of the underlying structural substrate and at least one rigid noncorrosive stiffening skin coupled to the syntactic foam shell layer. The syntactic foam shell layer includes at least two opposing subshells wrapped around the underlying structural substrate and the rigid noncorrosive stiffening skin includes at least two opposing skin sections attached to the at least two opposing subshells respectively. The syntactic foam shell layer is formed from syntactic foam which includes hollow microspheres disposed within a resin matrix.

A retaining wall (10) is disclosed having multiple piles (11) and multiple panels (12) mounted uprightly to the piles for lateral, pivotal movement. Each panel has a body portion (13) and an end hinge (22) mounted to each side end (18). Each hinge includes hinge barrels (23) adapted to conform with the laterally opposing hinge barrels and spaces (24) located at the opposite end of another panel.

Geocell structures stabilize water body shorelines and beds, slopes and retaining wall bridge abutments in such areas of construction as the oil and gas, transport and hydraulic engineering industries, amongst others. A blank for producing a weld-free geocell is made from a polymer sheet material having incisions therein in the form of segments of parallel lines. Adjacent incisions in the same row have a distance S between the ends thereof and the relationship S/L=K1, where K1 is from 0.1 to 0.5. The incisions of adjacent rows are at a distance D from each other and have the relationship D/L=K2, where K2 is from 0.1 to 0.7. At the ends of the incisions, there are openings which are oval or circular in shape. A weld-free geocell includes at least one blank stretched in a direction perpendicular to the lines of the incisions to form a three-dimensional cellular structure.

A temporary mechanical and fluidic connection with an anchor wall of a subsea tubular may use a substantially solid, reusable lid for a subsea tubular, which comprises a substantially solid upper surface, a predetermined set of lid anchors (20), a predetermined set of selectively activated valves (30), a seal (40) configured to engage an internal wall (101) of the subsea tubular and create a seal between substantially solid upper surface and the internal wall of the subsea tubular, a connector (50), and a controller (60) by maneuvering the substantially solid, reusable lid proximate an open end (102) of a subsea tubular (100), attaching the substantially solid, reusable lid to the open end of the subsea tubular, using the lid anchors (20) to secure the substantially solid, reusable lid to the open end of the subsea tubular, and operatively engaging the seal (40) to create an occlusive seal between substantially solid upper surface and an internal wall (101) of the subsea tubular.

An anchor is provided whose number of processes of work at the time of performance of installation work can be reduced and which can selectively fix a plurality of types of fixing targets. An anchor 10 includes: a shaft 22 to be buried in a ground; a head 24 into which a propulsive force for propelling the shaft 22 in the ground is inputted, the head 24 being provided on an upper end portion 22a of the shaft 22; and a sleeve 26 having a tubular peripheral wall portion 42 placed around the head 24. An outer diameter of the head 24 is specified to be greater than an outer diameter of the shaft 22. Consequently, an undersurface 32a is secured on an outer peripheral portion 32 of the head 24. The peripheral wall portion 42 is provided in an upper end portion 42a with an opening portion 44 in which a first fixing target 12c, 12d, or 12f is fitted as needed. The peripheral wall portion 42 is provided in a lower end portion 42b with a retainer 46 including an opposing surface 48 facing the outer peripheral portion 32 (the undersurface 32a) of the head 24 from below, and a retaining surface 50 to be pressed against a second fixing target 12a or 12b from above as needed.