A measurement system for measuring a subgrade reaction coefficient of a plurality of layers having different depths in a ground is provided. The system includes an object provided on a ground surface of the ground. An earth pressure gauge measures an earth pressure of the plurality of layers with respect to a load of the object. A settlement gauge measures a settlement amount of the plurality of layers with respect to the load of the object. The disclosed technology calculates the subgrade reaction coefficient of the plurality of layers on the basis of the earth pressure and the settlement amount.

A measurement system for measuring a subgrade reaction coefficient of a plurality of layers having different depths in a ground is provided. The system includes an object provided on a ground surface of the ground. An earth pressure gauge measures an earth pressure of the plurality of layers with respect to a load of the object. A settlement gauge measures a settlement amount of the plurality of layers with respect to the load of the object. The disclosed technology calculates the subgrade reaction coefficient of the plurality of layers on the basis of the earth pressure and the settlement amount.

Disclosed is an apparatus and method of using that grips a rod of small diameter and uniform cross-section of metal, fiberglass, or composite material used to probe the soil to locate underground utilities in a manner that permits a user of any height or strength to ergonomically and safely advance the rod into the soil and retract the rod from the soil regardless of how deep the utility may be buried.

A method for building a drainage well in a loose granular soil is disclosed. The method includes inserting a liner tube into a loose soil using an inserting device. The liner tube includes a housing and an internal shaft placed inside the housing and coupled to inside the housing via a locking mechanism. Subsequent to insertion into the soil, the internal shaft is unlocked from the housing and removed therefrom. Thereafter, a grooved pipe is inserted inside the housing using the inserting device. Subsequent to the grooved pipe insertion into the housing, the housing is removed from the loose granular soil using a mechanical excavator and a space between the loose granular soil and the grooved pipe is filled with a filling material.

A method for building a drainage well in a loose granular soil is disclosed. The method includes inserting a liner tube into a loose soil using an inserting device. The liner tube includes a housing and an internal shaft placed inside the housing and coupled to inside the housing via a locking mechanism. Subsequent to insertion into the soil, the internal shaft is unlocked from the housing and removed therefrom. Thereafter, a grooved pipe is inserted inside the housing using the inserting device. Subsequent to the grooved pipe insertion into the housing, the housing is removed from the loose granular soil using a mechanical excavator and a space between the loose granular soil and the grooved pipe is filled with a filling material.

The traditional limit equilibrium slice method does not consider the distribution of the interslice normal force when analyzing the slope stability. That is, the present invention takes into consideration the distribution of the acting positions of the thrust line, and thus provides a slope stability limit equilibrium calculation method based on the distribution characteristics of the interslice normal force. For the deep concave slip surface, it is found that the improved limit equilibrium method and the traditional limit equilibrium method have a large error in the safety factor, which is as high as about 20%. The method of the present invention has the characteristics of simplicity and reliability, and will provide more accurate results for slope stability analysis.

A bipartite sensor array comprising two portions capable of assembly into a single sensory system. A first portion includes rigid bodies connected by elongate flexures and fitted with gravimetric tilt sensors. The elongate flexures are capable of non-monotonic and non-constant bend in two degrees of freedom. A second portion includes rigid bodies connected by joints, contains the first portion. The second portion, which may be delivered and assembled separately from the first, provides rigidity and protection, enabling the first portion to have short rigid bodies and long connecting flexures, thereby reducing the number of sensors required. The bipartite sensor array is applicable to geotechnical measurements of soil and civil structures.

A bipartite sensor array comprising two portions capable of assembly into a single sensory system. A first portion includes rigid bodies connected by elongate flexures and fitted with gravimetric tilt sensors. The elongate flexures are capable of non-monotonic and non-constant bend in two degrees of freedom. A second portion includes rigid bodies connected by joints, contains the first portion. The second portion, which may be delivered and assembled separately from the first, provides rigidity and protection, enabling the first portion to have short rigid bodies and long connecting flexures, thereby reducing the number of sensors required. The bipartite sensor array is applicable to geotechnical measurements of soil and civil structures.

Multiple subterranean probes at an area of land detect soil conditions and wirelessly transmit soil condition information to a service provider's backend server or to a technician's hand-held wireless device. The server provides multiple user interface screens of a customer application that display soil condition information and irrigation's system status. Local micro weather stations may determine and wirelessly transmit weather condition information to the server. An installer may use the customer application to determine that received signal strength at a given probe is weak and should thus be relocated, or to determine refined location information corresponding to the probe. Historical soil condition information and artificial intelligence may predict soil conditions where a previously installed probe has been moved or quit working. Probes' housings seal internal electronics, including soil condition sensors, wireless communication modules, processors, and memory. Location coordinates may be acquired at a supra-high rate to increase location determination precision.

A trailer mounted soil sampler including one or more soil sampling assemblies mounted thereon. Each of the soil sampler assemblies being selectively pivotally movable between horizontally disposed and vertically disposed positions. Each of the soil sampling assemblies includes an elongated hollow soil probe which is driven into the ground to collect a soil sample therein. The soil sampler includes a soil cleaning and oiler mechanism. The soil sampler also includes a trash cleaner for cleaning trash from the area where the soil probe is to be driven into the ground. Further, the soil sampler includes a soil sample collection apparatus for collecting the soil samples in bags.