6 results about "Collapse mode" patented technology

The invention provides a dangerous rock degradation and collapse simulation test system and method under a multi-field coupling effect, and the system comprises a flexible stress loading device which provides a vertical stress for a dangerous rock mass sample to enable the sample to have the same stress level as a natural state; a dangerous rock mass sample is used for simulating various collapse modes by controlling the angle of a soft belt and a hollowed-out area; the corrosion device is used for providing a dry-wet cycle and osmotic pressure environment for the dangerous rock mass sample; the data acquisition device is used for recording surface displacement, acoustic characteristics and external factors of the rock mass along the soft zone; the damage degree calculation device is used for calculating the damage degree of the dangerous rock mass under multi-field coupling; the safety coefficient calculation device is used for obtaining the safety coefficient of the dangerous rock mass under multi-field coupling; and the safety evaluation device is used for constructing an evaluation model and evaluating the safety state of the dangerous rock mass. According to the method, collapse simulation caused by degradation of the soft belt under the multi-field coupling effect is achieved, and the problems of early-stage safety evaluation and graded early warning of dangerous rock instability based on multi-index fusion are solved.

The invention relates to a construction process for excavating high slope sludge mixed sand and silty clay by combination of a trailing suction dredger. Comprising the following steps that S1, a medium-sized drag suction dredger is adopted to conduct preposed construction on a high slope dredging section of a channel, and a slope area working face is developed for a large-sized drag suction dredger; and S2, the large drag suction dredger enters the site for construction. A medium-sized drag suction ship and a large-sized drag suction ship reach the construction position, adjust the ship direction, lower an excavation rake and a positioning rake, drag suction construction is conducted in a stepped excavation operation mode, a side slope bottom layer sideline is excavated in the length direction of a side slope, then raking is conducted, the ships are turned around, an upper layer is excavated in the length direction of the side slope, and a lower layer is excavated in the length direction of the side slope. And the excavation operation is repeated until the side boundary of the surface layer of the side slope is excavated, the upper-layer soil naturally collapses under the action of gravity to fill up the notch, and the height of the side slope is reduced in a step-by-step collapse mode. The equipment advantages of the drag suction dredger in dredging construction are fully exerted, the problem of soil pollution in a construction water area is avoided, and meanwhile the construction efficiency is improved.

This invention provides a simulation test system and method for rock mass degradation and collapse under multi-field coupling. The system includes: a flexible stress loading device to provide vertical stress to the rock mass sample, making the sample have the same stress level as in its natural state; the rock mass sample, which simulates various collapse modes by controlling the angle of the weak zone and the erosion zone; a corrosion device to provide the rock mass sample with a wet-dry cycle and osmotic pressure environment; a data acquisition device to record the surface displacement, acoustic characteristics, and external factors of the rock mass along the weak zone; a damage degree calculation device to calculate the damage degree of the rock mass under multi-field coupling; a safety factor calculation device to obtain the safety factor of the rock mass under multi-field coupling; and a safety assessment device to construct an assessment model and assess the safety status of the rock mass. This invention realizes the simulation of collapse caused by the degradation of the weak zone under multi-field coupling, and solves the problem of early safety assessment and graded early warning of rock mass instability based on multi-index fusion.

The invention relates to a modular frame structure for collapse and rescue research and a test method thereof, and belongs to the technical field of civil engineering structure tests. The model comprises a steel skeleton module, a concrete module, a connecting steel rod, a cone spring self-locking clamping assembly and an adjusting pressing block. The steel skeleton module is provided with an accommodating blind hole and a lateral mounting groove, and the concrete module is provided with a through hole; bamboo-shoot-shaped teeth are arranged at the two ends of the connecting steel rods and penetrate through the adjacent steel framework module containing blind holes and the concrete module through holes; the cone spring self-locking clamping assembly is arranged in the containing blind hole and matched with the bamboo shoot-shaped teeth of the connecting steel rod to form one-way self-locking. The adjusting pressing block is installed in the lateral installation groove and abuts against the end of the connecting steel rod to achieve axial limiting. Through modular design and a self-locking connection mechanism, the device is fast to assemble, high in parameterization adaptability, recyclable, free of maintenance, good in mechanical equivalence and suitable for collapse mode and rescue disturbance research, the test cost is remarkably reduced, and the test period is shortened.

The utility model provides a kind of building collapse rescue training module, including a horizontal bottom plate 4;Left and right ends of bottom plate 4 are installed with vertical left side plate 2 and right side plate 11 by screw and L-shaped fixing piece 3;The middle of bottom plate 4 is installed with vertical middle side plate 9 by screw and L-shaped fixing piece 3;The left end surface of middle side plate 9 is vertically installed with two longer adjusting sliding grooves 8, and the left end surface of middle side plate 9 is vertically installed with two shorter adjusting sliding grooves 8, and the left end surface of middle side plate 9 is vertically installed with right inclined plate 10 on two adjusting sliding grooves 8 by butterfly nut 7 and hinged connecting piece 6 on two adjusting sliding grooves 8.The utility model is small in size, movable, can be widely used in basic fire rescue station, meet the basic fireman daily training requirements.The utility model can be repeatedly built and used, can be built in four kinds of local collapse or complete collapse mode building collapse scene, and training mode is more abundant.

The application relates to a secondary collapse monitoring and early warning system for a building under aftershock, which comprises a building structure monitoring module and an early warning module; the building structure monitoring module comprises a plurality of sensors, the sensors are installed at local collapse building target monitoring points, and are used for monitoring the structural response of the local collapse building under aftershock; the early warning module is provided with a dynamic early warning threshold algorithm, different initial early warning thresholds are set according to the characteristic collapse mode of the local collapse building on site, and accurate and timely early warning is provided after data screening processing and sensitivity analysis are carried out by collecting aftershock source signals and structural response signals, meanwhile, the collapse early warning threshold is dynamically updated and is used for collapse judgment and early warning next time. Compared with the prior art, the application considers two factors of aftershock and structural response, and through the dynamic iterative early warning threshold, the monitoring and early warning of the secondary collapse of the building can be more scientific and accurate.