A control device for applying steel support prestress in deep foundation pit

Abstract

The invention relates to an adjusting and controlling device for application of prestress to steel supports for deep foundation pits. The device comprises a transmission part and a supporting part; the transmission part comprises a hand wheel, a connecting rod, a bottom bevel gear I, a transmission bevel gear I, a transmission rod, a transmission bevel gear II, a bottom bevel gear II, a screw rod, a lifting nut and a metal sleeve which are connected sequentially; the supporting part comprises a metal casing coating the transmission part as well as a bracket I and a bracket II which are hinged to the metal casing through a hinge piece I and a hinge piece II. The device is simple to operate, high in applicability, widely applicable to different models of steel support structures and capable of being reused. With the device, lower wedge iron can be effectively prevented from moving downwards along with upper wedge iron, and the stability of construction processes is guaranteed. Besides, accurate and fine adjustment of relative positions of the wedge iron to telescopic rods can be realized with the device, so that optimal combination points can be found, pressurization is more effective, and the pressurization working efficiency at loose ends of the steel supports can be remarkably improved.

Description

technical field [0001] The invention belongs to the field of deep foundation pit support, and in particular relates to a novel adjusting device for applying prestress to steel support and support of deep foundation pit. Background technique [0002] In recent years, with the rapid development of high-rise buildings, super high-rise buildings and municipal projects in major cities in my country, the scale of underground space development is increasing day by day, and the number of corresponding deep foundation pit projects is also increasing. Therefore, the design of deep foundation pits And construction technology has become a technical hot issue. At the same time, as the project has higher and higher requirements for deep foundation pits, various problems continue to appear during the construction process. Conventional steel supports in deep foundation pit engineering such as figure 1 As shown, the steel support includes a fixed end, an active end and a steel pipe. The act...

AI Technical Summary

Problems solved by technology

However, this technology has the following problems: 1. It needs to be designed and manufactured separately for the lower wedge iron, which is not universal; 2. It cannot fully realize the precise fine-tuning of the relative position between the wedge iron and the telescopic rod, which is limited by the setting of the oval hole Position; 3. Only one side is fixed by one bolt, and the stability needs to be verified

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