Hoisting auxiliary device for collapsed building pieces

The invention provides an auxiliary device for hoisting a collapsed building into a whole. The hoisting auxiliary device for the collapsed building pieces comprises a hoisting disc and a hoisting net. The hoisting disc is of a planar or conical frame structure, a plurality of connecting pieces are arranged on the top surface and the bottom surface of the hoisting disc respectively, the hoisting net is of a flexible latticed structure and is connected with the connecting pieces arranged on the bottom surface of the hoisting disc, and a plurality of steel sheets are arranged on the bottom surface of the hoisting net. By means of the collapsed building piece lifting auxiliary device, the problems that collapsed buildings are inconvenient to clean, and the cleaning speed is low are solved.

Method and system for determining supporting pressure of tunnel face of oppositely excavated tunnel and medium

The invention discloses an oppositely-excavated tunnel face support pressure determining method which comprises the following steps that S1, an oppositely-excavated tunnel face soil body active damage mode is established, and the active damage mode comprises logarithmic spiral wedge-shaped sliding face damage bodies in front of two tunnel faces and cylindrical collapse bodies in front of the upper portions of the two tunnel faces; s2, determining a geometrical relationship of an active failure mode, and obtaining a moment balance equation of a logarithmic spiral wedge-shaped slip surface failure body and a cylindrical collapse body based on a limit equilibrium method; and S3, performing reverse derivation and calculation according to the moment balance equation to obtain the critical supporting force P of the oppositely-excavated tunnel face. The active failure mode and the calculated critical support force P result are reliable and reasonable.

Mass file management system and method based on database

Multi-field coupling rock joint stretching and synchronous ultrasonic testing device and method

The invention provides a multi-field coupling rock joint stretching and synchronous ultrasonic testing device. The multi-field coupling rock joint stretching and synchronous ultrasonic testing device comprises a first stretching connecting component, a second stretching connecting component and a third stretching connecting component which are connected in sequence, a hollow cylinder is arranged at the first end of the first tensile connecting member, and the second end of the first tensile connecting member is connected with a loading table of the triaxial testing machine; a hollow circular truncated cone is arranged at the first end of the second stretching connecting component, a steel ball is arranged at the second end of the second stretching connecting component, the steel ball is assembled in a hollow cylinder to form spherical hinge, and an ultrasonic probe is arranged in the hollow circular truncated cone; the first end of the third tensile connecting member is connected with the ...

Building collapse prevention and early warning device

The invention provides an anti-collapse and early-warning device for a building. The building anti-collapse and early warning device comprises a supporting device and an early warning device arranged on the supporting device, one end of the supporting device is detachably arranged on an outer wall of a building, the other end of the supporting device is fixedly arranged on the ground, and the early warning device comprises a strain gauge arranged on the supporting device. And the alarm is connected with the strain gauge through a circuit. The building anti-collapse and early warning device provided by the invention realizes the purpose of reinforcing and monitoring the building with accident risk.

Rock joint direct stretching and synchronous ultrasonic testing device and testing method

The invention discloses a rock joint direct stretching and synchronous ultrasonic testing device and a testing method, the rock joint direct stretching and synchronous ultrasonic testing device comprises two groups of stretching assemblies which are centered and fixed at two ends of a to-be-tested sample, and each stretching assembly comprises a connector, an ultrasonic probe, a mounting box of the ultrasonic probe and a clamp; the connector, the mounting box and the clamp are arranged front and back and are detachably connected; the connector is used for clamping and fixing the end part of the to-be-tested sample; the ultrasonic probe clings to the end surface of the to-be-tested sample; the clamps of the two groups of tensile assemblies are respectively connected with a tension sensor and a fixed base of the tensile testing machine; and recording ultrasonic data when the axial tensile load is applied to the to-be-tested sample until the to-be-tested sample is snapped and damaged.

Three-direction five-surface loading and unloading test system for large-size rock mass sample

The invention discloses a large-size rock mass sample three-direction five-surface loading and unloading test system, which comprises a loading and unloading test machine, and the loading and unloading test machine comprises a sample loading table for fixing a sample, a lifting frame arranged above the sample loading table and a lifting assembly for driving the lifting frame to move up and down, a top static pressure loading cylinder for loading a top surface of the sample and a lateral static pressure loading cylinder for loading four side surfaces of the sample are arranged on the lifting frame, and a sample loading cavity with an opening in the bottom is formed between the top static pressure loading cylinder and the lateral static pressure loading cylinder; the test sample can be loaded into the test sample loading cavity, the three-way five-surface loading and unloading test system further comprises a transportation system for transporting the test sample from the outside of the loading ...

预防软件由于长时间运行而发生错误的方法

The method of preventing software bug caused by long time running includes the following steps: recording the running time of the software; setting some threshold; informing the software system when the running time exceeds the threshold; sending request of less time by the user to the software for the software state to reset; storing data before resetting the software and restoring data after reset. By means of the method of the present invention, the software is reset before the software produces fault to preventing software error caused by long time running. The present invention is widely applicable, significant in practice and universal.

Rock mass sample dynamic and static combined loading device

The invention discloses a dynamic and static combined loading device for a rock mass sample, which can apply static load and dynamic disturbance to the rock mass sample and can meet the mechanical property requirements of dynamic and static combined loading and unloading of a deep large-size rock mass. Therefore, the dynamic and static combined loading device for the rock mass sample, provided by the invention, comprises a loading head, a static loading cylinder for pushing the loading head to apply a static load to the sample, and a disturbance component which acts on the loading head to apply a dynamic disturbance load to the sample, the disturbance assembly comprises a disturbance rod and a disturbance oil cylinder for applying an impact load to the disturbance rod, a channel for the disturbance rod to penetrate out is formed in a piston rod of the static loading cylinder, the disturbance rod is installed in the channel in a sliding mode, one end of the disturbance rod penetrates out ...