The invention relates to a securing means and a method for securing a civil engineering element to a construction machine by means of a flexible securing element, wherein a first end of the flexible securing element is attached to the construction machine and a second end is provided with a connecting link which can pass through a securing lug on the civil engineering element and can be releasably fastened to the construction machine by a connecting means. According to the invention, a detection unit is provided on the connecting means, which detection unit is designed for identifying fastening of the connecting link to the connecting means. The detection unit can generate and output a signal if fastening of the connecting link is identified.

A method is provided for using a collar to either drive a post into the ground or remove a post from the ground. The method includes, when driving a post into the ground, coupling the collar to the post in a first orientation so that a post opening of a first portion of the collar extends about the post, and applying a driving force to a second portion of the collar. The method also includes, when removing a post from the ground, coupling the collar to the post in a second orientation, rotated approximately 180 degrees from the first orientation, so that the post opening of the first portion of the collar extends about the post, and applying an extracting force to the second portion of the collar.

A method is provided for using a collar to either drive a post into the ground or remove a post from the ground. The method includes, when driving a post into the ground, coupling the collar to the post in a first orientation so that a post opening of a first portion of the collar extends about the post, and applying a driving force to a second portion of the collar. The method also includes, when removing a post from the ground, coupling the collar to the post in a second orientation, rotated approximately 180 degrees from the first orientation, so that the post opening of the first portion of the collar extends about the post, and applying an extracting force to the second portion of the collar.

A cutting tool adapter for creating an underpinning structure and method of creating the underpinning structure are provided. In some examples, the cutting tool adapter may connect a cutting tool to a working machine arm to enable the cutting tool to cut and dislodge soil below an existing foundation or structure. As the soil is cut and dislodged, it is mechanically mixed with an additive, such as a cementitious material, via the cutting tool. The mixed soil and additive may then harden in the area below the existing structure or foundation to create an underpinning structure to provide additional support for the existing structure or foundation.

A cutting tool adapter for creating an underpinning structure and method of creating the underpinning structure are provided. In some examples, the cutting tool adapter may connect a cutting tool to a working machine arm to enable the cutting tool to cut and dislodge soil below an existing foundation or structure. As the soil is cut and dislodged, it is mechanically mixed with an additive, such as a cementitious material, via the cutting tool. The mixed soil and additive may then harden in the area below the existing structure or foundation to create an underpinning structure to provide additional support for the existing structure or foundation.

A construction process of soil nailing wall for geological disaster control is provided, which uses a construction equipment of soil nailing wall for geological disaster control, including underframe, lifting assembly and etc.; a lifting assembly is installed on the left side of the upper side of the underframe. When in use, the disclosure can automatically cut off the tree trunks extending out of the slope surface, and then install the grouting rods in the soil slope holes. At the same time, the disclosure can adapt to the tree trunks with different bending degrees to cut them, which solves the problem of tree trunks interfering with the construction, greatly improves the efficiency, prevents the cut tree trunks from falling onto the slope, avoids damaging the slope surface, and can adapt to a variety of situations to cut off the tree trunks.

A method for constructing a solar cell farm includes steps of: (1) installing a plurality of reinforced concrete piles on a latticed divided surface of a ground or a water level of the foreshore in a solar cell panel installation area; (2) constructing a lattice-type truss by connecting a plurality of steel beams in a transverse direction on the concrete piles and a plurality of rails on the steel beams in a longitudinal direction on the steel beams; (3) installing a solar cell panel by varying the slope of the panel by varying the length of a length-variable connection means between the plurality of rails of the truss and 4 axes of the left, right, upper and lower sides of the solar cell panel; and (4) constructing a rail for driving the track vehicle between the rails mounted on the transverse steel beams of the truss.

A method for constructing a solar cell farm includes steps of: (1) installing a plurality of reinforced concrete piles on a latticed divided surface of a ground or a water level of the foreshore in a solar cell panel installation area; (2) constructing a lattice-type truss by connecting a plurality of steel beams in a transverse direction on the concrete piles and a plurality of rails on the steel beams in a longitudinal direction on the steel beams; (3) installing a solar cell panel by varying the slope of the panel by varying the length of a length-variable connection means between the plurality of rails of the truss and 4 axes of the left, right, upper and lower sides of the solar cell panel; and (4) constructing a rail for driving the track vehicle between the rails mounted on the transverse steel beams of the truss.

The invention relates to a watercraft having a hull (10), an introduction installation (20) for an object (70) to be anchored in the water, said introduction installation (20) being disposed on said hull (10), and at least one compressor (30) having at least one compressed-air line (40) which leads into the water and is coupled to at least one compressed-air distribution installation (45) which has a horizontal extent and for generating a bubble curtain (50) below the hull (10) has a multiplicity of mutually spaced apart outflow openings (46), characterized in that the hull (10) has at least two sub-hulls (11, 12) which are disposed so as to be mutually spaced apart and connected to one another, and a void (15) which is at least partially surrounded by the bubble curtain (50) is situated between the sub-hulls (11, 12).

The invention relates to a watercraft having a hull (10), an introduction installation (20) for an object (70) to be anchored in the water, said introduction installation (20) being disposed on said hull (10), and at least one compressor (30) having at least one compressed-air line (40) which leads into the water and is coupled to at least one compressed-air distribution installation (45) which has a horizontal extent and for generating a bubble curtain (50) below the hull (10) has a multiplicity of mutually spaced apart outflow openings (46), characterized in that the hull (10) has at least two sub-hulls (11, 12) which are disposed so as to be mutually spaced apart and connected to one another, and a void (15) which is at least partially surrounded by the bubble curtain (50) is situated between the sub-hulls (11, 12).