5 results about "Penetration force" patented technology

The application discloses a construction method of full-steel-casing mud-free cast-in-place pile for soft soil layer in sensitive area. The method collects underground pipelines, underground water level, soft soil layering parameters and deformation value of adjacent sensitive objects to determine the control parameters of steel casing penetration, drilling and settlement; in the process of static pressure penetration of the steel casing, the soil in the previous section of the steel casing is taken out to form a soil unloading section, then the next section of the steel casing is controlled to continue to be pressed in, and the penetration speed and correction amount are dynamically corrected according to the penetration force, vertical deviation and surrounding settlement value; then the soil is taken out in the steel casing to form a hole without mud, and re-excavation, slag removal or drilling adjustment is carried out according to the hole forming stability evaluation result; when pouring concrete, the stage lifting amount is determined according to the pouring amount and pressure, so that the bottom end of the steel casing is kept in the safe embedding range. The application can reduce the disturbance of soft soil, hole collapse, mud inclusion and pile breakage risk, and realize mud-free environmental protection construction.

This invention discloses a drilling and stirring vibratory compactor, comprising: a first driving component, a horizontal excitation component, a second driving component, and a drilling and stirring component connected in sequence. The first driving component drives the horizontal excitation component to generate a horizontal excitation force, and the second driving component drives the drilling and stirring component to perform cutting and stirring operations. The vibratory compactor has two operating modes: a horizontal excitation mode generated by the horizontal excitation component and a drilling and stirring guided hole-making mode generated by the drilling and stirring component. During hole-making, the combination of the horizontal excitation and drilling and stirring guided hole-making modes results in strong penetration and high hole-making efficiency. When hole-making is completed and the pile-forming stage begins, the horizontal excitation mode can be used alone, which is more conducive to efficient vibration compaction of the pile body, resulting in a better quality pile. Therefore, different modes can be selected according to the construction steps, demonstrating strong flexibility and adaptability.

A method of acquiring and analyzing properties of a fresh or partially set cement-based material includes penetrating the material with a probe driven by a controller-regulated actuator; measuring, with a force sensor, penetration forces applied to the probe; transmitting, from the sensor, force data to the controller; determining, by the controller, penetration depths based on the force data and / or actuator position data; recording, by the controller, the depths; associating, by the controller, the depths and the forces to form synchronized pairs; determining, by a processor, the yield force of the material based on change in relationship between the depth and the force within the pairs, and calculating, by the processor, a static yield stress of the material based at least in part on the yield force, a probe geometry factor, and an angle of internal friction of the material. A portable penetration device is also disclosed.

The utility model provides a concrete strength detection device which comprises a shell and a guide sleeve, and the guide sleeve is elastically connected with the shell; a force measuring sensor and a displacement sensor are arranged in the shell at intervals, a probe is arranged in the guide sleeve, the end part, deviating from the shell, of the probe penetrates through the guide sleeve, and the end part, close to the shell, of the probe is connected with the force measuring sensor; the force measuring sensor is configured to detect the penetration force of the probe penetrating into the concrete, and the displacement sensor is configured to detect the compression displacement of the guide sleeve in the probe penetration process; the strength of the concrete is the ratio of the penetration force to the penetration depth of the probe, and the penetration depth is the compression displacement of the guide sleeve. The detection device provided by the utility model is convenient to carry, provides convenient detection conditions for existing concrete strength detection, and is helpful for improving the detection precision at the same time.