A method of lining a pipe with a lining mixture formed from a dry component and a liquid is discussed. The method includes placing the dry component in a dry component surface container located above ground, conveying the dry component from the dry component surface container to a dry component subterranean supply container located underground, conveying the dry component from the dry component subterranean supply container to a mixer located underground, mixing the dry component with the liquid to form the lining mixture, and applying the lining mixture to the pipe with a mixture applicator.

Apparatuses, components, methods, and techniques for selectively texturing concrete surfaces are provided. An example method of providing a surface portion of an architectural precast concrete wall panel with an abraded texture is provided. The method includes a step of spraying a surface portion of an architectural precast concrete wall panel with an aqueous-based particulate abrasive mixture under conditions adequate to at least partially abrade the surface portion. An example sprayer system for abrading a concrete surface is also provided. The system includes an aqueous-based particulate abrasive mixture dispenser including a spray nozzle arrangement. The system also includes a material communication assembly in abrasive flow communication with the aqueous-based particulate abrasive mixture dispenser. The system also includes a dispenser positioning arrangement.

Apparatuses, components, methods, and techniques for selectively texturing concrete surfaces are provided. An example method of providing a surface portion of an architectural precast concrete wall panel with an abraded texture is provided. The method includes a step of spraying a surface portion of an architectural precast concrete wall panel with an aqueous-based particulate abrasive mixture under conditions adequate to at least partially abrade the surface portion. An example sprayer system for abrading a concrete surface is also provided. The system includes an aqueous-based particulate abrasive mixture dispenser including a spray nozzle arrangement. The system also includes a material communication assembly in abrasive flow communication with the aqueous-based particulate abrasive mixture dispenser. The system also includes a dispenser positioning arrangement.

A reinforced compound concrete beam-column joint containing demolished concrete lumps and a construction method are disclosed. The steel strip stirrups configured to constrain column longitudinal reinforcements of the reinforced compound concrete column containing demolished concrete lumps and the steel connection sheets with grooves are arranged in joint at positions of the upper and lower beam longitudinal reinforcements of the reinforced compound concrete beam containing demolished concrete lumps. The steel strip stirrups abut against the column longitudinal reinforcements. The steel connection sheets are welded to the steel strip stirrups. One end of the short steel bars with threads at one end is welded into the grooves of the steel connection sheets, and the other end is connected to the beam longitudinal reinforcement via a steel sleeve. The joint prevents the beam longitudinal reinforcements from passing through the joint and thus causing reinforcements congestion.

A method for hoisting and transporting assemblies in an underground nuclear power plant, the method including: 1) pouring concrete onto a reactor cavern to form a rock anchor beam; hoisting a circular bridge crane to the reactor cavern through a hoist shaft on a top of the reactor cavern; mounting the circular bridge crane on the rock anchor beam by using a truck crane; 2) installing a containment cylinder and a track beam of a polar crane in the reactor cavern using the circular bridge crane; hoisting a gantry crane on one end of a polar crane girder and sending the polar crane girder to the reactor cavern; hoisting the other end of the polar crane girder using the circular bridge crane; allowing the polar crane girder to be horizontal; and mounting the polar crane girder on the track beam.

A method for hoisting and transporting assemblies in an underground nuclear power plant, the method including: 1) pouring concrete onto a reactor cavern to form a rock anchor beam; hoisting a circular bridge crane to the reactor cavern through a hoist shaft on a top of the reactor cavern; mounting the circular bridge crane on the rock anchor beam by using a truck crane; 2) installing a containment cylinder and a track beam of a polar crane in the reactor cavern using the circular bridge crane; hoisting a gantry crane on one end of a polar crane girder and sending the polar crane girder to the reactor cavern; hoisting the other end of the polar crane girder using the circular bridge crane; allowing the polar crane girder to be horizontal; and mounting the polar crane girder on the track beam.

An inspection support apparatus according to an aspect includes a memory and a processor connected to the memory, and the processor is configured to obtain three-dimensional data of the structure that includes a plurality of planes formed by the frame; from the three-dimensional data, detect a plurality of first planes that include at least three points of the three-dimensional data; for each of the detected first planes, compute, from the three-dimensional data, a number of three-dimensional points at a distance that is equal to or shorter than a prescribed distance from the first plane; and according to the computed number of three-dimensional points, identify, from the detected plurality of first planes, a second plane positioned on a forefront of the frame of the structure.

A method of repairing concrete having a crack, including cutting an elongated slot across the crack. Inserting an elongated rigid grid into the slot to extend across the crack, the rigid grid having a length dimension greater than a width dimension which is greater than a thickness dimension, the rigid grid defining a plurality of openings there through that extend toward opposites sides of the slot; and adhering the elongated rigid grid in the slot with an adhesive that flows into at least some of the plurality of openings. The rigid grid can be formed from a rigidified fabric grid, a wire mesh, or metal.

The invention relates to the technical field of pump truck control, and discloses a pump truck boom control method, a pump truck boom control system and a pump truck. The pump truck boom control method comprises: detecting a working condition of a boom, wherein the boom is divided into first-type arms close to the first arm and second-type arms close to the last arm in advance; and controlling each arm in the first-type arms to act at respective preset movement speed when the boom is in an opening placing boom working condition before the construction or in a folding placing boom working condition after the construction. The method can realize speed-up control on movement speeds of the each arm in the first-type arms under the opening placing boom working condition before the construction or under the folding placing boom working condition after the construction without a boom posture detection sensors.

A compact, demountable or collapsible, portable stand or support apparatus for providing construction elements, typically scaffolding planks and poles, in a safe and user accessible position. The invention including a demounting connector, specially adapted to removably connect a leaning support to a base, in an apparatus that is assembled for use and can be collapsed or demounted for purposes of storage and/or transport between work sites. The invention seeks to prevent worker injury as a consequence of lifting heavy construction elements off the ground, by placing them in a safe and substantially upright or user-friendly and accessible position prior to their handling.