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Method for analyzing relationship between deformation of foundation pit and ground subsidence outside of foundation pit

A technology for ground subsidence and foundation analysis, which is applied in foundation structure testing, excavation, foundation structure engineering, etc., and can solve problems such as different specific coefficients

Inactive Publication Date: 2013-07-17
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the differences in construction geological conditions, although the expression of the deformation is the same, the specific coefficients are different, and it is difficult to determine through direct measurement and calculation

Method used

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  • Method for analyzing relationship between deformation of foundation pit and ground subsidence outside of foundation pit
  • Method for analyzing relationship between deformation of foundation pit and ground subsidence outside of foundation pit
  • Method for analyzing relationship between deformation of foundation pit and ground subsidence outside of foundation pit

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Embodiment Construction

[0032] The foundation pit project of Dalian Metro Line 2 Wanjia Station is taken as an example.

[0033] Wanjia Station is located on the west side of Weitai Bridge in the western main passage, and is set along the east-west direction of Hongqi Middle Road. The designed starting and ending mileage of Wanjia Station is DK21+396.949~DK21+577.349, and the total length of outsourcing is 180.4m; the mileage of the station center is DK21+461.248, the elevation of the track top is 7.180 meters, and the thickness of the covering soil is about 3.8~4.8m; the standard section width is 18.5m, and the depth 18m.

[0034] like figure 1 As shown, the deformation of the foundation pit enclosure structure can be decomposed into three forms: forward rotation, reverse rotation and bending. , , Represent the maximum displacement (cm) of the three forms of enclosure deformation in the horizontal direction, respectively. and Can be measured with inclinometers and total stations, but M...

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Abstract

The invention discloses a method for analyzing a relationship between deformation of a foundation pit and ground subsidence outside of the foundation pit. The method is characterized by confirming a relational expression between the deformation and soil body subsidence outside of the foundation pit according to three basic deformation features of a foundation pitenclosing structure, and including decomposing an enclosing structure deformation mode, collecting soil body subsidence volumes outside of the foundation pit on site, building an inversion expression, processing data by using a diagonal cross least square method, fitting subsidence data by using a difference evolutionary algorithm (DE), reasonably selecting a zoom factor F and a crossover probability Cr of the DE, generating and evaluating simulated data and the like. The method for analyzing the relationship between the deformation of the foundation pit and the ground subsidence outside of the foundation pit obtains optimal values of the zoom factor F and the crossover probability Cr by analyzing influences of the zoom factor F and the crossover probability Cr in an algorithm, and uses the diagonal cross least square method as a difference selection function for inversion calculation. The method for analyzing the relationship between the deformation of the foundation pit and the ground subsidence outside of the foundation pit aims at obtaining maintaining deformation conditions by monitoring the soil body subsidence outside of the foundation pit and forecasting deformation in future phases, and can be widely used in prediction studies available for the corresponding relationship between the ground subsidence outside of the foundation pit and enclosing deformation.

Description

technical field [0001] The present invention relates to During foundation pit construction in geotechnical engineering, foundation pit deformation monitoring, especially involving the determination of the relationship between foundation pit deformation and ground settlement outside the pit. Background technique [0002] During the construction of the foundation pit of the subway station, the deformation control of the enclosure structure directly affects the safety and stability of the surrounding rock and the support structure, and also affects the construction speed of the foundation pit. Especially for foundation pit projects in the city, higher requirements are put forward for the control of foundation pit deformation. However, the deformation measurement of the foundation pit is relatively complicated and the cost is high, which has caused obstacles to its effective monitoring, but the monitoring of the soil settlement outside the pit is relatively simple. Consid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D33/00
Inventor 刘文生吴作启崔铁军由丽雯杨逾邵军张远孙琦杜东宁
Owner LIAONING TECHNICAL UNIVERSITY
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