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Ultra-deep foundation pit pumping based ground subsidence intelligent early-warning method and monitoring system

A technology for land subsidence and deep foundation pits, which is applied in the field of foundation soil survey, foundation structure engineering, special data processing applications, etc. It can solve the problems of low accuracy and lack of consideration of particularity, and reduce the dependence on labor , Improve accuracy and save engineering cost

Inactive Publication Date: 2016-08-31
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, these existing early warning technologies do not take into account the particularity of deep confined water pumping for ultra-deep foundation pits, the low accuracy of direct use of geological parameters in survey reports, and the passive early warning of traditional monitoring.

Method used

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  • Ultra-deep foundation pit pumping based ground subsidence intelligent early-warning method and monitoring system
  • Ultra-deep foundation pit pumping based ground subsidence intelligent early-warning method and monitoring system
  • Ultra-deep foundation pit pumping based ground subsidence intelligent early-warning method and monitoring system

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Embodiment 1

[0037] The purpose of the present invention is achieved through the following technical solutions: the present invention is firstly based on the inversion analysis of hydrological and engineering geological parameters, obtains more realistic geological parameters to construct a finite element numerical model, and calculates according to relevant requirements Then, use the measured land subsidence data to build a gray model, and predict the land subsidence after the error test. Then, by comparing the predicted value with the threshold value, the potential land subsidence risk can be judged and discovered in advance, and the early warning system will give an alarm accordingly. .

[0038] like Figure 1 to Figure 4 As shown, the ground subsidence intelligent early warning method based on ultra-deep foundation pit pumping provided by the present embodiment comprises the following steps:

[0039] Step (1): Combined with the shape of the ultra-deep foundation pit and the stratum co...

Embodiment 2

[0050] In this embodiment, the present invention is further described in detail by taking the monitoring of ground subsidence caused by the dewatering construction of a subway ultra-deep foundation pit in a certain area as an example.

[0051] The project overview of the dewatering construction of a subway ultra-deep foundation pit in a certain area is as follows:

[0052] The ultra-deep foundation pit of a subway is 21.0m, which is an ultra-deep foundation pit. It is located in a densely built area in the city center and there are many high-rise buildings around. There are mainly 6 layers of soil in the affected area of ​​confined water extraction, namely: ① a layer of artificial fill with a thickness of 4.0m; ② a layer of silty clay with a thickness of 3.5m; and ③ a layer of silty silty clay with a thickness of 10.5m ; ④ layer of silty clay, layer thickness of 5.0m; ⑤ layer of silty fine sand, layer thickness of 3.5m, which is a confined aquifer; Due to the need for anti-su...

Embodiment 3

[0067] like figure 1 As shown, based on the intelligent early warning method of land subsidence in Embodiment 1, this embodiment also provides an intelligent monitoring system for extracting confined water from ultra-deep foundation pits to induce land subsidence based on the intelligent early warning method for land subsidence in Embodiment 1, which includes: : data acquisition system 10, parameter inversion system 20, intelligent analysis system 30, early warning system 40, the data acquisition system 10, parameter inversion system 20, intelligent analysis system 30 and early warning system 40 are electrically connected in sequence;

[0068] Among them, the data acquisition system 10 is used to connect the wireless sensors arranged and buried at the monitoring points, for example, the multi-point displacement meter 101, the porosimeter 102, and the stress meter 103, in combination with the actual situation on the site, to obtain the on-site measurement database;

[0069] The...

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Abstract

The present invention discloses an ultra-deep foundation pit pumping based ground subsidence intelligent early-warning method and monitoring system. The ground subsidence intelligent early-warning method comprises: S1. in combination with on-site reality, laying a wireless sensor at a monitoring point, so as to obtain an on-site measurement database; S2. based on on-site pumping experimental data of an ultra-deep foundation pit, performing inversion analysis on a hydrologic geological parameter by adopting groundwater flow software, and performing inversion analysis on each earth-layer project geological parameter by adopting finite element software, and establishing an ultra-deep foundation pit infinite element three-dimensional numerical model that is closest to the on-site reality, so as to obtain a ground subsidence threshold; S3. constructing a gray prediction model to perform dynamic prediction; and S4. according to an intelligent prediction and determination result, enabling an early-warning system to predict a risk, so as to implement intelligent and automated monitoring and early-warning. The method and system are capable of effectively monitoring ground subsidence invited by ultra-deep foundation pit piestic water extraction, and achieve intelligent, precise and automated ground subsidence monitoring and early-warning.

Description

technical field [0001] The invention relates to the field of ultra-deep foundation pits of municipal water conservancy projects, in particular to an intelligent early-warning method and monitoring system for ground subsidence based on ultra-deep foundation pit pumping. Background technique [0002] With the deepening of underground space development, super-large and ultra-deep foundation pits continue to emerge. At present, ultra-deep foundation pits (digging depth ≥ 15m) involve many new and complex engineering and technical problems. For example, in the construction of deep foundation pits of some ultra-deep subway stations and super high-rise buildings, due to the large excavation depth and long period, the underground confined water is often extracted for a long time during the excavation of the foundation pit, resulting in a strong impact on the surrounding geological environment. Disturbance, resulting in a series of geological problems such as serious land subsidence....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E02D1/00
CPCE02D1/00G06F30/23
Inventor 王寿生姜弘王明卓黄天荣
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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