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Foundation pit axial force servo system simulation entity controller platform

A technology of servo system and controller, which is applied in the direction of basic structure engineering, basic structure test, construction, etc., to achieve the effect of simple operation

Pending Publication Date: 2022-07-01
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies of the existing indoor test research scheme of the axial force servo system of the foundation pit, and provide a set of foundation pit earthwork excavation and unloading, steel support structure erection, underground diaphragm wall deformation control, additional load application and The foundation pit axial force servo system, which integrates axial force and displacement monitoring, simulates the physical controller platform to realize the three-dimensional dynamic display of the same control platform and display the deformation control effect of the foundation pit under different servo settings.

Method used

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  • Foundation pit axial force servo system simulation entity controller platform
  • Foundation pit axial force servo system simulation entity controller platform
  • Foundation pit axial force servo system simulation entity controller platform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] like figure 1 , 2 , 3, a set of foundation pit axial force servo system simulates the entity controller platform, including load system, measurement transmission system, control output system, plexiglass test box 11, water injection box 18, optical fiber deformation monitor 13, strain gauge 14 , pressurized top cover 21, support 47 and several connecting pieces, etc.

[0043] The load system includes the eccentric load of the foundation pit and the axial load of the steel support. Loading is divided into two forms: loading and unloading. The operation methods of the two are basically the same. The steel support axial force compensation loading is different. It is divided into one end loading and two ends loading. The loading method is through the drainage groove 20 to the water tank 49 Water injection is transferred through pulley 22 to apply the load. The load system is composed of ordinary steel plate 34, standard weight block 32, and end spring sleeve ( Figure 7...

Embodiment 2

[0051] Embodiment 2 A set of foundation pit axial force servo system simulation entity controller platform as described in Embodiment 1, the specific operation is:

[0052] 1) Fill the plexiglass test box 11 with sand, place the embedded parts and compact them in layers until the top surface of the sand sample is slightly lower than the upper surface of the test box 11, and support the underground diaphragm wall steel plate 12 steel 30 A hole 35 is reserved at the erection site, and then the optical fiber deformation monitor 13 and the strain gauge 14 are installed in a suitable position, and then the predetermined position is driven into the sand vertically.

[0053] 2) Open all valves, debug the water pump, and fill up each water tank, so that the stable water head with a constant water level in the water injection tank 18 meets the control requirements for the test.

[0054] 3) Start the foundation pit earthwork excavation and unloading, and excavate the sand between the 12...

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Abstract

The invention discloses a foundation pit axial force servo system simulation entity controller platform which performs steel support axial force compensation simulation by adopting a water injection and load application mode, that is, through controlling the flow and the flow velocity of a water suction pump and an electromagnetic valve and a stable water head with a constant water level height of a water injection tank, a foundation pit axial force servo system is simulated. In the process of foundation pit eccentric loading and earthwork layering and blocking excavation unloading, water is injected into the water containing tank, and graded loading is conducted through the pulleys. The deformation of the underground diaphragm wall steel plate is extended, the dial indicator is used for indirect measurement, and meanwhile, the optical fiber deformation monitor and the strain gauge are used for large-range deployment and control on the underground diaphragm wall steel plate, so that important parameters of foundation pit deformation control are obtained, and the rough deformation process of the underground diaphragm wall is mastered to facilitate data arrangement and analysis. The device can be used as a research means of indoor tests and is used for analyzing the stress deformation characteristics of the underground diaphragm wall and researching the deformation control mechanism of the foundation pit axial force servo system, the loading mode is simple, and field tests are easy to operate.

Description

technical field [0001] The invention belongs to the technical field of foundation pit engineering construction, relates to a foundation pit deformation control test research, is a simulation entity controller platform of a foundation pit axial force servo system, and particularly relates to a set of steel support axial force servo system simulation of a super-large and ultra-deep foundation pit Entity Controller Platform. Background technique [0002] Due to the continuous acceleration of urbanization, large-scale underground engineering projects have gradually increased, and the foundation pit engineering is also developing towards a larger and deeper trend, which also brings new challenges to the technical requirements of various foundation pit projects. The construction quality of foundation pit earthwork excavation, steel support structure erection and deformation control depends to a large extent on the application and setting effect of the steel support axial force. A...

Claims

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Application Information

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IPC IPC(8): E02D33/00E02D17/04
CPCE02D33/00E02D17/04E02D2300/0029E02D2300/0035E02D2600/10
Inventor 王哲刘建福许四法刘翰辰王旭锋
Owner ZHEJIANG UNIV OF TECH
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