When a slewing motor is at a stop, a first slewing control unit of a controller that controls an operation of the slewing motor sets a first monitoring area that is set with respect to a slewing body as a designated area, and then controls, depending on whether an obstacle is detected in the first monitoring area, whether to prohibit or allow start of the slewing motor in response to a drive manipulation. Furthermore, a second slewing control unit of the controller sets one or more second monitoring areas that are set at places remoter from the slewing body than the first monitoring area as the designated area, and then controls, depending on whether the obstacle is detected in the second monitoring area(s), whether to limit the operation of the slewing motor in response to the drive manipulation after the start of the slewing motor is allowed.

A pile head analysis system captures a plurality of images of a construction site including a pile using a camera mounted on an unmanned aerial vehicle (UAV), acquires the images, generates a three-dimensional model of the construction site, detects a pile head from the three-dimensional model, and determines consistency between the detected pile head and preliminarily acquired design information.

A pile head analysis system captures a plurality of images of a construction site including a pile using a camera mounted on an unmanned aerial vehicle (UAV), acquires the images, generates a three-dimensional model of the construction site, detects a pile head from the three-dimensional model, and determines consistency between the detected pile head and preliminarily acquired design information.

A shock absorbing apparatus (suppressor) for a vibratory pile driver includes three suppressor sections, including a first section adapted and arranged to absorb a load up to a selected amount. A second suppressor section is adapted to absorb a load above the first shock-absorbing section, with a third suppressor system providing a transition between first and second suppressor action as load increases.

A machine and method utilize a tracked undercarriage including a frame with a central body, front and rear transverse assemblies connected to the central body and extending on opposite sides. Each of a pair of lateral tracks is connected, at the front and at the rear, to ends of the transverse assemblies. The base machine includes excavation equipment having different working positions/configurations. Each of a pair of front load cells of the tracked undercarriage is mounted between a lateral track and the front transverse assembly. Each of a pair of rear load cells is mounted between a lateral track and the rear transverse assembly. Each load detects force data indicating the reaction force exerted between the associated lateral track and the respective transverse assembly. A control system computes a barycentre planar position of the machine situated substantially at a reference plane computed as a function of the force data.

A machine and method utilize a tracked undercarriage including a frame with a central body, front and rear transverse assemblies connected to the central body and extending on opposite sides. Each of a pair of lateral tracks is connected, at the front and at the rear, to ends of the transverse assemblies. The base machine includes excavation equipment having different working positions/configurations. Each of a pair of front load cells of the tracked undercarriage is mounted between a lateral track and the front transverse assembly. Each of a pair of rear load cells is mounted between a lateral track and the rear transverse assembly. Each load detects force data indicating the reaction force exerted between the associated lateral track and the respective transverse assembly. A control system computes a barycentre planar position of the machine situated substantially at a reference plane computed as a function of the force data.

A construction monitoring method and system for a V-shaped column in an underground foundation pit, a terminal and a storage medium can include the following steps: acquiring different stress-related data at a plurality of preset positions of stand columns in real time; and analyzing and judging whether the change rate of the stress-related data exceeds a preset change rate range or not or whether the stress-related data exceeds a preset stress-related data range or not.

The invention relates to a foundation engineering method and a construction apparatus for producing a columnar structure in the ground, in which a foundation engineering tool is driven in a rotating manner about an axis of rotation and introduced with a feeding motion into a ground, wherein the columnar structure is produced in the ground. According to the invention it is provided that during the production of the columnar structure a rotating motion and a feeding motion of the foundation engineering tool are recorded over time and forwarded to an evaluation unit, in that by means of a sensor means at least one further processing parameter is recorded over time during the production of the columnar structure in the ground and is forwarded to the evaluation unit and in that by the evaluation unit a three-dimensional model of the columnar structure is produced and displayed.

The invention relates to a foundation engineering method and a construction apparatus for producing a columnar structure in the ground, in which a foundation engineering tool is driven in a rotating manner about an axis of rotation and introduced with a feeding motion into a ground, wherein the columnar structure is produced in the ground. According to the invention it is provided that during the production of the columnar structure a rotating motion and a feeding motion of the foundation engineering tool are recorded over time and forwarded to an evaluation unit, in that by means of a sensor means at least one further processing parameter is recorded over time during the production of the columnar structure in the ground and is forwarded to the evaluation unit and in that by the evaluation unit a three-dimensional model of the columnar structure is produced and displayed.

The present invention discloses an apparatus (100) for tracing pile set during pile driving of a pile (150) comprising: a panel (110) for attaching to the pile (150); a rotatable holding mechanism (120) with remotely controllable function for holding a writing instrument (160) against the panel (110) to trace the pile set for at least a series of blows during the pile driving; a sliding mechanism (130) with remotely controllable function, which slides on a pair of bearing strips (131′, 131″) to provide lateral movement of the holding mechanism (120) across the panel (110) after each blow of the pile driving; and a platform (140) with groves for holding the bearing strips (131′, 131″) in place for allowing the sliding mechanism (130) to slide freely in multiple directions; characterized in that, the holding mechanism has a rotatable lever arm (126) which is secured by a resilient means (129′) to reduce excess vibration so that the writing instrument (160) is held in a still position while allowing the lever arm (126) to be rotated by motor controlled arm (127) during the tracing of pile set.