A self-propelled construction device, in particular a soil compactor, includes a turbocharged diesel engine with a first radiator arrangement for cooling charge air and a second radiator arrangement for cooling a cooling liquid and/or hydraulic oil, with a first radiator fan being allocated to the first radiator arrangement and a second radiator fan being allocated to the second radiator arrangement and the first radiator fan and the second radiator fan being able to be operated essentially independently from each other.

The present disclosure discloses a system and a method for injecting a composition into soil. The composition is passed under pressure into a filler tube housed within an expandable element situated in a first hole. When the composition is pumped, therein the filler tube is raised and, the expandable element expands when the composition fills the expandable element, thereby solidifying the adjacent soil. Further, due to expansion, the structure above the ground is lifted. The rate of pumping the composition into the filler tube is determined by pressure of the composition, the type of soil, or by the chemical reaction detected by a first sensor and/or a second sensor present in a second or third hole. The material injected into the ground improves the soils beneath a structure, such as a house to create a resistance once the material permeates the soil and expands.

A perforated geocell is made from a plurality of strips that form cells. Each cell wall has a single pattern of perforations spaced evenly over the cell wall. This avoids uneven distributions of stress over the cell wall, reducing deformation of the geocell.

A perforated geocell is made from a plurality of strips that form cells. Each cell wall has a single pattern of perforations spaced evenly over the cell wall. This avoids uneven distributions of stress over the cell wall, reducing deformation of the geocell.

Geopolymers are one type of aluminosilicate materials formed through the polymerization of silicate and aluminate tetrahedrons. Geopolymer is used as a non-calcium-based stabilizer to mix with sulfate-rich soils. The stabilized soils were exposed to deionized water for 7 days until the volume of soil samples reached constant. Volumetric expansion of the sulfate-rich soil samples stabilized with metakaolin based geopolymer was 7 times lower than those stabilized with lime while the mechanical strength of stabilized soil samples were significantly improved.

Proper soil compaction is critical to providing structural support in any geo-construction project, particularly road construction. Described herein are devices, methods, and systems for intelligent soil compaction. In some embodiments, these disclosed systems, methods, and devices can provide up to 100% coverage with mechanistic measurements through machine integrated devices. These novel in-situ material characterization devices and methodologies enable continuous, mechanistic monitoring of soil compaction for use with a variety of geo-construction devices, including static pad foot soil compactors. In one embodiment, a strain gage instrumented pad is integrated into a pad foot soil compactor, and contact force is measured instrumented pad that is sensitive to soil compaction. In other embodiments, the disclosed device may allow for mechanistic measurements that may use a simplified geometry, and numerical and analytical modeling. In some embodiments, an inverse model, based on finite element modeling, may be used to extract constitutive parameters from plate strains.

A structure that includes strut tubes that receive and hold within them a granular material—soil, sand, gravel, regolith, or plastic pellets—to which compression is applied after loading. By this means the struts are stiffened to facilitate its use as a durable shelter. The structure is erected by inflating the strut tubes with a fluid which is then displaced with the granular material before compression is applied.

A control apparatus for a soil compacting apparatus which can be driven by a drive motor. The control apparatus includes a running-direction operating element, which is pivotable about a first axis, for predetermining a running direction of the soil compacting apparatus by an operator, and further includes a rotational-speed operating element, which is pivotable about a second axis, for setting a rotational speed of the drive motor. The first axis and the second axis are congruent and form a common pivot axis.

A compactor includes a plate and an electric motor coupled to the plate and configured to impart vibration thereto. The electric motor including a stator and a rotor defining a rotational axis and having a center of mass that is not intersected by the rotational axis.

A method for operating a soil processing machine includes a) providing an extent of steering-driving speed relationship reflecting a maximum permissible driving speed of the soil processing machine as a function of the extent of steering, b) detecting an actual extent of steering of the soil processing machine, c) setting a driving speed of the soil processing machine in such a way that the driving speed does not exceed the maximum permissible driving speed assigned to the actual extent of steering in accordance with the extent of steering-driving speed relationship provided in measure a).