A system and method for excavating an aggregate from below or beside a foundation through an access hole is provided. The system includes an air compressor and an air line fluidly coupled to the air compressor. The system further includes a valve disposed in fluid communication on the air line, and an end effector in fluid communication with the air compressor. The end effector extends between a first end coupled to one of the air line or the valve and a second end. The end effector is sized to fit through the access hole. The system further includes a nozzle coupled to the second end of the end effector.

Systems and methods for a vacuum excavator to prevent to formation of blockages know as spoil bridges are provided. The vacuum excavator includes a high vacuum blower that is coupled through a multi-stage airflow system that has a debris tank to which an excavation hose is coupled. A knuckle boom having two arm segments includes actuators to angularly position the arm segments, and hose roller assemblies that carry the excavation hose. The systems and methods control the angular position of the arm segments to control the flow curvature of the excavation hose from an excavation site to the debris tank in order to eliminate or reduce the occurrences of spoil bridges therein.

Hydro excavation apparatus for excavating earthen material are disclosed. The hydro excavation apparatus includes a first reservoir for holding a base fluid therein, a second reservoir for holding an additive therein, a vacuum system for removing earthen material from an excavation site, and an additive dosing assembly. The additive dosing assembly includes at least one of a pump and a valve fluidly connected to the second reservoir. The additive dosing assembly is selectively controllable to introduce an additive into at least one of the base fluid and the removed earthen material.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

A method and apparatus for excavation using vibration and vacuum may be connected to a vehicle, mounted to either a chassis or trailer. The apparatus comprises a vacuum tube with an input end. A vacuum generator provides suction at the input end of the vacuum tube, thereby drawing a stream of fluidized material into the vacuum tube. Affixed to the vacuum tube is a vibration generator which causes the vacuum tube to vibrate. The use of the vibration and suction eliminates the need for fluid-based vacuum systems.

The present invention relates to a system and method for uncovering and removing pipeline from the seafloor using a subsea trenching system using pressurized water to uncover pipe, a subsea shear carried by a barge to cut lengths of the pipeline, and a grapple carried by a barge to lift cut lengths of pipeline for placement on a pipe haul and recovery barge.

A treatment method for a river system in a reservoir area, comprising: S1. determining whether a time from a current date to the rainy season is less than a preset duration; S2. moving a pressure sensor upward; S3. determining whether the pressure data meets corresponding conditions; S4. determining whether a duration of the pressure data is less than the preset duration; S5. determining whether an interval between the current time and the time for collecting pressure/nitrogen and phosphorus is greater than a preset number of days; S6. acquiring an image information of a river bottom, and sending it to neural network model for identification to obtain a depth of a sludge; S7. determining whether the depth of a sludge has reached a dredging depth, if so, starting a sludge pump to clean up; S8. collecting nitrogen and phosphorus concentration, and removing nitrogen and phosphorus when the concentration exceeds a standard.

Microdredging systems comprising a pumping platform and loading platform. In certain embodiments, system operates autonomously and is adapted to allow the loading platform undock from the pumping platform for disposal of the removed sediment.

Systems and methods of restoring a lake including dredging, island creation, water treatment, real estate development, computer modeling of environmental conditions, wave height reduction, sediment removal and encapsulation, bathymetry contouring, littoral zone restoration, plant restoration, and/or fish restoration.