Foundation pit construction field monitoring device and method

Abstract

The invention discloses a foundation pit construction field monitoring device and method. The foundation pit construction field monitoring device comprises a base, an adjusting rod and a prism; the base is used for being placed in a detecting point position; the adjusting rod is fixed to the base and comprises a vertical rod body and an inclined rod body; the prism is arranged on the adjusting rod; an over 15-degree specific angle is formed between the inclined rod body and the vertical rod body; the prism is fixed to the top end of the inclined rod body through a first hanging rope with a specific length; and a plumb bob is hung on the upper half part of the inclined rod body through a second hanging rope adjustable in length. During measuring, the height of the prism is determined through a total station, the plumb bob and a detection point are made to be located in the same horizontal position, a point body, located on the same horizontal plane with the prism, on the second hanging rope is determined, and the distance between the point body and the plumb bob is determined; and the height of the detecting point is determined according to the distance between the point body and the plumb bob as well as the height of the prism, so that upheaval deformation data of the detecting point are determined.

Description

technical field [0001] The invention relates to foundation exploration during foundation pit construction, in particular to a monitoring device and a monitoring method for foundation pit deformation in civil engineering. Background technique [0002] A foundation pit is a pit that needs to be excavated during the construction of a building, a municipal project or an underground structure. In order to ensure the foundation pit construction, the safety of the main underground structure and the surrounding environment are not damaged, it is necessary to carry out foundation pit support, dewatering and excavation, and to carry out corresponding investigation, design, construction and monitoring. This comprehensive project of the system It is called foundation pit engineering. [0003] Foundation pit engineering is to carry out construction operations in the face of various foundation soils and complex environmental conditions, and there are uncertain factors such as external fo...

AI Technical Summary

Problems solved by technology

In this invention, the change in the position of the prism is used as the measurement value of the deformation of the bottom of the foundation pit. However, since the prism is arranged at the raised position of the bottom of the pit, the uplift of the ground at the bottom of the pit may cause the prism lifting device to tilt, so that the change in the position of the prism cannot be accurately reflected. The deformation of the bottom of the foundation pit; on the other hand, it is necessary to set up prisms at each detection point on the bottom of the pit, and use a total station for multiple measurements

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