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Automatic monitoring method for layered settlement of vacuum preloading foundation

A layered settlement and foundation technology, which is applied in the test of basic structure, basic structure engineering, construction, etc., can solve the problems of bad weather, bending and deformation of settlement pipes, and inconvenient data collection, so as to ensure continuity and real-time, Reduce monitoring costs and facilitate data collection

Pending Publication Date: 2021-10-22
TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Affected by the differential settlement deformation of the deep soil, the settlement pipe is bent and deformed, which affects the accuracy of the monitoring data;
[0005] (2) It is necessary to regularly review the elevation of the pipe top at the settlement point, and calculate the settlement amount of each settlement ring. The reference point must be prepared in advance during the measurement. Personnel spend a lot of time and physical strength, and due to the long measurement distance, continuous turning points are prone to measurement errors, and data collection is very inconvenient;
[0006] (3) It is necessary to drill and bury the settlement pipe, which is time-consuming, laborious and costly;
[0007] (4) It is easily affected by the bad weather on site, and it is impossible to perform measurement, which affects the real-time and continuity of monitoring data

Method used

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  • Automatic monitoring method for layered settlement of vacuum preloading foundation
  • Automatic monitoring method for layered settlement of vacuum preloading foundation
  • Automatic monitoring method for layered settlement of vacuum preloading foundation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] As shown in the figure, an automatic monitoring device for layered subsidence of a vacuum preloaded foundation according to the present invention includes: an installation substrate 1, a signal transmitting device 7, a signal collection terminal 8, and a plurality of sensing units 14 for sensing layered subsidence and a plurality of measuring units 2 connected to the sensing unit 14 for measuring the displacement of the sensing unit 14;

[0044] A plurality of induction units 14 are installed on the installation substrate 1, and the spacing between two adjacent induction units 14 in the vertical direction is the same, and each induction unit 14 includes a sliding cylinder 4 and a sliding cylinder. 4 inside the wiring ring 3, the outer wall of the slider 4 is fixed on the installation substrate 1, the top of the slider 4 is open, and a chute is opened on one side of the slider 4, and the wiring ring 3 The movable end extends out of the chute and cooperates with the chute...

Embodiment 2

[0058] On the basis of Embodiment 1, the separation distance and quantity of the plurality of sensing units 14 are determined according to monitoring design requirements.

[0059] Furthermore, the surface of the bobbin 11 is threaded, which drives the bobbin 11 to rotate when the pull cord 6 is displaced, and at the same time makes the encoder 12 output an electrical signal with the rotation of the bobbin 11 .

Embodiment 3

[0061] A method for using an automatic monitoring device for vacuum preloaded ground layer settlement of the present invention, comprising the following steps:

[0062] (1) Determine the length and width of the installation substrate 1 according to the depth of each soil layer of the foundation to be monitored according to the specifications and design requirements;

[0063] (2) According to the design requirements, use GPS to determine multiple monitoring points for the layered settlement of the foundation soil;

[0064] (3) Determine the embedding depth and interval (usually 2m) of the induction unit 14 according to the design requirements, and then weld the first clamping plate 9 and the second clamping plate 10 on the mounting substrate 1, so that the first clamping plate 9 and the second clamping plate 9 The clamping plates 10 are parallel to each other and extend outward, and the cap 15, the slider 4 and the boot 5 are welded on the installation substrate 1, and the cap ...

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Abstract

The invention discloses an automatic monitoring method for layered settlement of a vacuum preloading foundation. The automatic monitoring method comprises the following steps that (1) the length and the width of a mounting base plate are determined; (2) a plurality of monitoring point positions are determined; (3) the burying depth and interval of each sensing unit in the monitoring point position are determined, and the assembly of the sensing units is completed; (4) a wiring ring is placed in a sliding cylinder, and the length of a pull rope is adjusted to complete the assembly of measuring units; (5) a mounting substrate is driven to a designed depth in a mode of being vertical to the ground; (6) each measuring unit is electrically connected with a signal transmitting unit and is fixed to the mounting substrate; and (7) a signal sending device collects electric signals output by an encoder and sends the electric signals to a signal collection terminal for processing and generating the settlement volume of each soil layer. Settlement of the soil layer drives the wiring ring to move downwards in the sliding cylinder, the pull rope is driven to generate displacement, linear displacement is converted into the electric signal through the encoder, then the electric signal is processed to generate the soil layer settlement amount, real-time monitoring is achieved, and continuity and real-time performance of monitoring data are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of ground monitoring, and in particular relates to an automatic monitoring method for layered settlement of vacuum preloaded ground. Background technique [0002] With the large-scale advancement of land reclamation projects, large-area dredging soft soil foundations need to be reinforced. Vacuum preloading is currently the most effective and economical method for soft soil foundation reinforcement in water transportation projects. During the vacuum preloading process, the soft foundation will settle. This settlement is characterized by large compression of shallow soil and small compression of deep soil, and inconsistent consolidation characteristics and settlement of each soil layer. In the construction process of soft foundation treatment, it is of great significance to control the progress of the project, ensure the quality and safety of the project, and inspect the construction plan by monitoring the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
CPCE02D33/00E02D2600/10
Inventor 袁方龙刘丹忠刘文彬朱楠赵岩刘洪亮王健李菲菲
Owner TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG
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