The invention discloses a rock-soil comprehensive model experimental box. The rock-soil comprehensive model experimental box comprises a reaction frame, wherein cross beams are arranged at the lower part of the reaction frame, and a test bin is arranged on the cross beams and is provided with an actuator loading interface; connecting rods are arranged at the upper part of the reaction frame; a steel beam is arranged on the connecting rods and is provided with a sliding groove; a slider is connected in the sliding groove in a sliding manner; an actuator is connected under the slider; the lowerend of the actuator is connected with a long plate by a ball valve. The rock-soil comprehensive model experimental box disclosed by the invention has the advantages that the pile and slope tests can be carried out simultaneously; the operation is simple and convenient, and the use is convenient; the side walls and the bottom part of the test bin are detachable, so that the soil replacement is convenient.

Rock-soil comprehensive model experimental box

The invention provides a lifting arm rack for a model test system and a working method, and relates to the field of model tests; the lifting arm rack comprises a first support and a second support; double-rocker mechanisms are hinged to the two sides of the first support respectively, and connecting rods corresponding to the two sets of double-rocker mechanisms are connected through a fixing plate; a loading mechanism is mounted on one side, facing the first support, of the fixing plate and is used for loading the test piece; the double-rocker mechanism is matched with a telescopic rod; one end of the telescopic rod is hinged to the double-rocker structure; the other end is hinged to the second support; the loading mechanism is connected with the support through a four-bar mechanism. The position of the loading mechanism is switched through swinging of the four-bar mechanism; when the test piece is installed, the loading mechanism withdraws from the path of the installation process ofthe test piece, after installation is completed, the loading mechanism restores to the original position to conduct loading operation, so automation of movement of the loading mechanism is achieved, the positioning precision of the working position is improved, and the test process is tightly connected.

Lifting arm rack for model test system and working method

The invention discloses a method for detecting a shell structure of a terrestrial magnetism vehicle detector. The method comprises the steps of determining a standard axle load of a pavement according to a design standard and a traffic condition of the pavement; according to the standard axle load, determining a maximum positive pressure borne by the pavement and obtaining a maximum shear stress of the pavement in a preset depth; and according to the maximum positive pressure and the maximum shear stress, detecting the shell structure of the terrestrial magnetism vehicle detector. According to the method, a detection standard of the shell structure of the terrestrial magnetism vehicle detector is determined through the standard axle load of the pavement, and the shell structure of the terrestrial magnetism vehicle detector can be effectively detected through the detection standard, so that the shell structure of the terrestrial magnetism vehicle detector meets the application demand, and the service life of the terrestrial magnetism vehicle detector is prolonged.

Method and device for detecting shell structure of terrestrial magnetism vehicle detector

PURPOSE:To enable observation of a stress condition under the ground and behavior of a subsoil material in the perimeter of an underground construction model by pressurizing a mobile side plate and a mobile bottom plate from outside to make the subsoil material compressed triaxially while the underground construction model is loaded horizontally. CONSTITUTION:A soil cell 1 is made up of a fixed upper lid 1a, a mobile side plate 1b and a mobile bottom plate 1c and an external frame 2 is provided on an outer circumference of the cell 1. The mobile bottom plate 2a and the mobile side plate 2b of the frame 2 are provided with jacks 3 and 4 equipped with load cells 3A and 4A. A soil manometer and a shear force meter are mounted on the outer circumferential surface of a shaft model 6 and a displacement meter is mounted near the lower part of the model 6. Then, the model 6 is installed in the cell 1 and a subsoil material (e.g. Toyoura standard sand) is fed to prepare a sample. Subsequently, the sample is compressed triaxially to measure a load applied with the load cells 3A and 4A and a soil pressure distribution is measured with a soil manometer. Moreover, the model 6 is pressed with an actuator 9 to measure a soil pressure or the like.

Arimoto Katsuji

Papers

Behavior experimenting apparatus for deep layer subsoil