Top part horizontal displacement monitoring method for foundation pit support device

A technology of horizontal displacement and foundation pit enclosure, applied in the directions of measuring devices, measuring instruments, surveying and mapping, and navigation, etc., can solve the problems of complicated methods, time-consuming and laborious, and achieve the effect of convenient application, reducing deviation, and increasing or decreasing monitoring points.

Active Publication Date: 2018-08-03
CHINA MCC20 GRP CORP
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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to overcome the complex method of monitoring the horizontal position of the foundation pit enclosure structure in the prior art, which leads to time-consuming and labor-intensive problems, so as to provide a simple, time-saving and labor-saving foundation pit enclosure device The method of top horizontal displacement monitoring

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  • Top part horizontal displacement monitoring method for foundation pit support device
  • Top part horizontal displacement monitoring method for foundation pit support device
  • Top part horizontal displacement monitoring method for foundation pit support device

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Embodiment Construction

[0023] Such as figure 2 with image 3 As shown, the present embodiment provides a method for monitoring the horizontal displacement of the top of the foundation pit enclosure device, including the following steps: Step S1: On the ground outside the end of the crown beam 11 that is farther away from the excavation surface of the foundation pit, facing Set up a total station at the crown beam 11; step S2: adjust the total station, and set the eyepiece of the total station eyepiece on the concrete surface at the top of the crown beam 11; step S3: initial observation station The total station, and determine the reference point of the total station, from one end of the crown beam 11 to the other end of the crown beam 11 in order to arrange points, and then connect all the points to form on the surface of the crown beam 11 Long straight line 14; step S4: start measuring from one endpoint of the long straight line 14 until the other end point, find out the larger point of the offse...

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Abstract

The invention relates to a top part horizontal displacement monitoring method for a foundation pit support device. A total station is erected on the ground on the outer side of an end of a crown beamcomparatively far away from a pit excavation face and exactly facing the crown beam. The total station is adjusted and a sight point of an eyepiece of the total station is set on a concrete face on the top end of the crown beam. Initial observation is performed on the total station and reference points of the total station are determined; points are set in sequence from one end to the other end ofthe crown beam and are then connected together so as to form a long straight line on the surface of the crown beam. Measurement is started from one end point of the long straight line to the other end point of the long straight line and a point at the long straight line having comparatively large displacement is found. A measurement result is drawn in to a grid form and a displacement curve graphof the top of the crown beam is generated. The invention can reflect the horizontal displacement level of the crown beam directly. The method is simple and is time saving and labor saving.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for monitoring the horizontal displacement of the top of a foundation pit enclosure protection device. Background technique [0002] In foundation pit engineering, especially deep foundation pit engineering, it is necessary to monitor the enclosure structure of the foundation pit during the excavation process, so as to control its deformation. Among them, the horizontal displacement of the top of the enclosure structure is an important monitoring index, which can directly reflect the impact of excavation construction on the enclosure. [0003] The monitoring method for the horizontal displacement of the top of the existing containment device, such as figure 1 As shown, several monitoring points 13 are usually set on the top of the crown beam 11 to be monitored (wherein the crown beam 11 is the concrete capping beam at the top of the enclosure device 12) along ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/02G01C15/00
CPCG01B21/02G01C15/00
Inventor 施群凯
Owner CHINA MCC20 GRP CORP
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