A method for adhering a tubular body onto a surface that includes smoothing a portion of the surface to create a smoothed segment of the surface and applying a tubular body directly onto the smoothed segment of the surface after the smoothing of the portion of the surface. The surface at the smoothed segment is smoother than the remainder of the surface. The method further includes applying an uncured protectant onto the tubular body while the tubular body is on the smoothed segment of the surface and curing the uncured protectant into a cured protectant while the uncured protectant is on the tubular body on the smoothed segment of the surface. The cured protectant protectively encases and adheres the tubular body to the surface.

A vibratory plow has a lift bracket. The lift bracket couples to an upper link by an upper spring having an upper energy absorptive member. The upper spring and upper energy absorptive member are configured to limit upper link movement relative to the lift bracket in a first direction. The lift bracket is coupled to the upper link by a lower spring having a lower energy absorptive member; the lower spring and lower energy absorptive member are configured to limit upper link movement relative to the lift bracket in a direction opposite the first direction. The upper link is coupled to a shaker box which is attached to a plow blade. The shaker box is configured to travel from a baseline position a first distance greater than two inches in the first direction before the upper spring compresses enough that the upper energy absorptive member dampens shaker box movement.

A system for laying an underwater pipeline on a bed of a body of water has a construction site to form a string of an underwater pipeline, the string being defined by a curved portion shaped substantially like a portion of the bed of the body of water characterized by an abrupt change in slope; at least two vessels to transfer, in the body of water, the string from the construction site to a laying site in the body of water and substantially on the vertical of a path along which to lay the string; and a plurality of floating devices configured to be coupled to the string and so as to selectively support and sink the string in the body of water, and progressively lay the string along the path on the bed of the body of water.

A method for excavating a ditch and installing an underground pipeline. The method includes excavating a ditch utilizing a predetermined GPS model having grading and alignment requirements for the ditch and the underground pipeline and inserting pipes into the ditch. A laser beam is projected from a laser beam apparatus in association with a first pipe section that utilizes the grading and alignment requirements of the predetermined GPS model to guide excavation and installation of one or more sections of pipes. A remote-controlled vehicle is inserted into the first pipe and is configured to focus the projected laser beam to guide excavation and installation of successive pipe sections. The remote-controlled vehicle is navigated through the pipeline during installation to guide grading of subsequent ditch sections and alignment of additional pipe sections.

A liquid level control system, which may be used with a clarifier in a sewage treatment plant, manages liquid level of an upstream basin by controlling liquid flow in or out of a system that may use a midstream device to equally distribute flow in or out of the basin. This headloss inducing device creates a non-linear relationship between upstream liquid level to be controlled and the lesser downstream liquid level behind the gate or valve. Without the use of electrical controls, the systems of the invention include a gate or valve with counterforces that manage the outflow stream of liquid while accounting for the non-linear head loss created by the midstream device, thus reaching a desired liquid level range for all system flowrates.

Pipe burial apparatus are disclosed that include sets of rotary nozzle cutters configured to straddle a pipe that is to be buried and a nozzle array connected to a nozzle supply pipe in a manner that places the nozzle supply pipe in a cutting path of a rotary nozzle cutter. The nozzle supply pipe may be actuated to alternatingly move the nozzle array between a position straddling the pipe being buried and a cutting position that is below the pipe being buried.

Disclosed is a method for installing a groundwater monitoring well inside a permeable reactive barrier (PRB) trench including excavating a PRB trench, installing a trench side-wall support, positioning a monitoring well borehole, installing an outer installation casing for pre-burying the monitoring well, installing a monitoring well positioning bracket, installing a monitoring well casing, installing monitoring well filter packs and seal materials, filling the trench with PRB media and capping with a covering soil layer, removing the outer installation casing, removing the trench side-wall support, completing the monitoring well with a wellhead, and conducting well development. This method avoids the complex procedure of re-drilling a borehole within the PRB media following the completion of PRB construction and media filling, assures that monitoring well installation protocols are followed and high quality and stable operation is achieved, and serves for groundwater monitoring to support the implementation and efficacy evaluation of the PRB technology.

Disclosed is a method for installing a groundwater monitoring well inside a permeable reactive barrier (PRB) trench including excavating a PRB trench, installing a trench side-wall support, positioning a monitoring well borehole, installing an outer installation casing for pre-burying the monitoring well, installing a monitoring well positioning bracket, installing a monitoring well casing, installing monitoring well filter packs and seal materials, filling the trench with PRB media and capping with a covering soil layer, removing the outer installation casing, removing the trench side-wall support, completing the monitoring well with a wellhead, and conducting well development. This method avoids the complex procedure of re-drilling a borehole within the PRB media following the completion of PRB construction and media filling, assures that monitoring well installation protocols are followed and high quality and stable operation is achieved, and serves for groundwater monitoring to support the implementation and efficacy evaluation of the PRB technology.

A pump apparatus comprises a primary pump having a relatively low pressure fluid input and a relatively high pressure fluid output and means, associated with said primary pump fluid input, operable where the ambient pressure is insufficient substantially to prevent cavitation in the primary pump, to locally increase the pressure at said primary pump fluid input.

An underground-structure construction method of arranging an underground structure by causing drilling apparatuses engaged with a concrete-made closed-shaped bottom frame to travel in a reciprocating manner to drill a just-underground of a bottom part of the underground structure, discharging to an earth surface excavated earth and sand of an internal ground, and extending a building frame of an upper part of the underground structure includes: open-cutting a ground to form a larger-sized mortar-shaped working hole; forming a closed-shaped horizontal reference area in an edge ground; arranging a bottom frame on the horizontal reference area; building a first stage building frame on the bottom frame; and backfilling, with backfill soil, an annular-shaped outer space of inner and outer spaces as a result of dividing the working hole, the drilling apparatuses being caused to uniformly drill, from the horizontal reference area as a drilling initiation plane, the just-underground of the bottom part.