Construction method for preventing deformation of utility tunnel at high-water-level liquefaction region

A technology of integrated pipe gallery and construction method, applied in water conservancy projects, underwater structures, excavation, etc., to achieve the effect of preventing floating deformation, convenient operation and good effect

Active Publication Date: 2014-12-24
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

For lifeline projects, such buoyancy often has serious consequences

Method used

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  • Construction method for preventing deformation of utility tunnel at high-water-level liquefaction region
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  • Construction method for preventing deformation of utility tunnel at high-water-level liquefaction region

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Embodiment

[0026] Example: such as Figure 1-5 As shown, this embodiment specifically relates to a construction method for preventing deformation of an underground comprehensive pipe gallery in a high water level liquefaction area, and the construction steps are as follows:

[0027] (1) Build enclosure 1 on both sides of the foundation pit to be excavated. The form of enclosure 1 can be reinforced concrete sheet pile, steel sheet pile, or underground diaphragm wall. The outer edge line is not less than 800mm to meet the construction operation space between the enclosure 1 and the underground comprehensive pipe gallery 2, and the depth of the enclosure 1 drilled into the soil is greater than the buried depth of the underground comprehensive pipe gallery 2 in the foundation pit; Pre-embed steel bars or steel plate connectors at the position where the shear connection key 4 needs to be connected. If the structural form of the enclosure 1 is reinforced concrete sheet piles, and the undergrou...

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Abstract

The invention discloses a construction method for preventing deformation of a utility tunnel at a high-water-level liquefaction region. The construction method comprises the following steps: arranging enclosure bodies on the two sides of a foundation pit to be excavated; excavating the foundation pit; laying horizontal gravel drainage passages at the bottom of the foundation pit in layers; pouring a bottom plate and wall plates on the two sides of the bottom plate of the utility tunnel on the horizontal gravel drainage passages in sequence; refilling covering soil between the wall plates and the enclosure bodies in layers; meanwhile refilling vertical gravel drainage passages along the wall plates; pouring a roof plate of the utility tunnel after refilling the covering soil and the vertical drainage passages to the position of the roof plate of the utility tunnel; refilling the covering soil on the top of the utility tunnel and refilling the vertical gravel drainage passages to the design ground. The construction method has the advantages that the construction steps are simple and a complex structure consisting of the foundation pit enclosure bodies, the gravel drainage passages and shear connectors is used for achieving the purposes of inhibiting the foundation liquefaction, quickening the drainage of the liquefied foundation and preventing the deformation of the utility tunnel due to floating.

Description

technical field [0001] The invention belongs to the technical field of underground engineering, and in particular relates to a construction method for preventing deformation of an underground comprehensive pipe gallery in a high water level liquefaction area. Background technique [0002] Municipal pipeline projects such as water supply, drainage, electricity, and gas in cities, commonly known as lifeline projects, are the key to maintaining the normal operation of urban functions. The underground comprehensive utility corridor is a modern and intensive urban infrastructure formed by placing more than two types of municipal pipelines in the same artificial space. The development of underground utility corridors has become an important direction for urban sustainable development. Compared with the general ground structure, the design service life of the underground comprehensive pipe gallery is longer, reaching 100 years. Once damaged, in addition to damage concealment and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D29/045E02D3/10E02D31/12
Inventor 杨剑王恒栋
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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