Determination method of deformation of soil body caused by pipe jacking construction by considering grouting pressure

A technology of soil deformation and determination method, applied in the field of construction engineering

Inactive Publication Date: 2012-07-04
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a method for determining soil deformation caused by pipe jacking construction, which determines the soil deformation cause

Method used

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  • Determination method of deformation of soil body caused by pipe jacking construction by considering grouting pressure
  • Determination method of deformation of soil body caused by pipe jacking construction by considering grouting pressure
  • Determination method of deformation of soil body caused by pipe jacking construction by considering grouting pressure

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Embodiment

[0066] A water delivery project adopts the pipe jacking method when crossing the river. The main pipe is 450m long. Two jacking pipes are used. The center distance between the pipes is 18m. Such as figure 1 As shown, the soil force mode in pipe jacking construction.

[0067] The concrete steps of this embodiment are as follows:

[0068] The first step is to clarify the geological conditions of the site: the uppermost layer (0.0-1.0m) is artificial landfill; the lower layer (1.0-3.1m) is a clay layer; the lower layer (3.1-11.5m) is a heavy clay layer , the lower layer (11.5-15.0m) is a heavy silty sandy loam layer; the next layer (15.0-17.5m) is a silty clay layer, and the lower layer (17.5-19.0m) is a silt layer; the lower layer (19.0 ~21.0m) is a silty clay layer, and its lower layer (21.0~27.8m) is a silt layer. The construction area mainly involves silt layer and silty clay layer. The soil layer parameters of the pipe jacking construction site were obtained by taking so...

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Abstract

The invention discloses a determination method of deformation of a soil body caused by pipe jacking construction by considering grouting pressure. The determination method comprises the following steps: determining parameters of a soil layer of a place by geological survey, then determining bulkhead additive thrust and displacement caused by friction force on the side surface by using a Mindlin displacement solution, determining the displacement and the deformation caused by the grouting pressure through a three-dimensional round hole expansion theory and determining the deformation caused by loss of the soil body and the like by a Sagaseta soil body displacement mode caused by the loss of the soil body; and finally determining the deformation of the soil body caused by the pipe jacking construction by superimposing the deformation caused by four factors and further providing a basis for the pipe jacking construction. According to the determination method disclosed by the invention, one-sidedness and unreliability in deformation prediction in the past are avoided, and the determination method has the main advantage of being more accurate to predict the deformation caused by the pipe jacking construction relative to a traditional method; and furthermore, the method is simple.

Description

technical field [0001] The invention relates to a method in the technical field of construction engineering, in particular to a method for determining soil deformation caused by pipe jacking construction. Background technique [0002] The pipe jacking technology is to use the hydraulic cylinder to jack the pipe jacking machine and the pipe joints to be laid underground one by one from the pipe jacking working well without excavating the surface, until the trenchless underground pipeline construction of the pipe jacking receiving well craft. Because the construction has the characteristics of no obstruction to traffic, no excessive noise and vibration, etc., pipe jacking technology is widely used in the construction of urban underground pipelines, such as urban water supply and drainage, gas pipelines, power tunnels, communication cables, and circulating water in power plants. Cooling pipes, etc. However, in the environment of dense urban buildings and underground structure...

Claims

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Application Information

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IPC IPC(8): G01B21/32
Inventor 许烨霜吴怀娜沈水龙李方楠
Owner SHANGHAI JIAO TONG UNIV
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