Displacement control system of wedge-shaped hydraulic support and its application method

Abstract

The invention provides a wedge-shaped-structure hydraulic support displacement control system comprising an inner pressurization hydraulic cylinder, a transition barrel, a supporting barrel, a locking wedge block, a force-bearing column and the like. The force-bearing column is fixedly connected with the inner pressurization hydraulic cylinder. The two inclined faces of the locking wedge block are in surface contact with the supporting barrel and the force-bearing column correspondingly so that transmission of the supporting force can be achieved. The included angles between the two inclined faces and the vertical plane are unequal. Unlocking and locking of the hydraulic system are achieved through hydraulic ejection and spring reset. Meanwhile, the invention further provides a use method of the wedge-shaped-structure hydraulic support displacement control system. The action relationship of the inner pressurization hydraulic cylinder and a third piston rod is coordinated through a PLC control unit, and unlocking and locking of the working state of the hydraulic system are completed. By means of the wedge-shaped-structure hydraulic support displacement control system and the use method of the wedge-shaped-structure hydraulic support displacement control system, resource consumption and potential safety hazards caused by manual operation can be avoided, and it is further ensured that foundation pit construction is safely and orderly conducted.

Description

technical field [0001] The invention belongs to the field of foundation pit construction, and in particular relates to a hydraulic cylinder with a hydraulic mechanical lock and a using method thereof. Background technique [0002] With the rapid development of urbanization, urban construction is becoming increasingly diversified and complex, the construction environment is becoming more and more complex, and the required standards are getting higher and higher. Nowadays, during geotechnical construction, especially in the process of excavating deep foundation pits, in order to protect the safety of the foundation pit itself and the surrounding buildings (structures), it is generally necessary to use some supporting structures to support the deep foundation pit. Support, such as reinforced concrete support, steel pipe support, etc. Due to the advantages of fast speed and low cost, the steel pipe support is increasingly used for deep foundation pit support, especially in some...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the deformation is difficult to control during the excavation and construction of deep foundation pits in geotechnical engineering (especially in areas with complex geological conditions and environmentally sensitive areas such as deep foundation pits along urban subway lines), the invention provides a support for foundation pits. The wedge-shaped structure hydraulic support displacement control system and its use method can synchronize and automatically lock the working state of the hydraulic cylinder in time, and realize the real-time mechanical self-locking function of the hydraulic cylinder, thereby avoiding a large amount of waste of manpower and financial resources caused by manual operation and the resulting Some unsafe factors in the foundation pit not only reduce the labor cost of using the micro-deformation control hydraulic cylinder of the foundation pit, but also effectively guarantee the safety of the construction process

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