A construction method for a comprehensive pipe gallery in a water-rich area
A construction method and technology of integrated pipe gallery, applied in water conservancy projects, artificial islands, underwater structures, etc., can solve the problems of pipe gallery not being used normally, concrete aging, durability discount, etc., and achieve high durability and enhanced durability performance and increase the service life
Active Publication Date: 2020-07-31
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
Therefore, the durability of the reinforced concrete integrated pipe gallery in an acidic environment will be greatly reduced. Long-term chloride ion intrusion and acidic liquid immersion will accelerate the aging of the concrete, which will cause steel corrosion and expansion to produce longitudinal cracks, which will eventually lead to the pipe gallery. Can not be used normally, causing huge economic losses
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[0031] The construction method described in the present invention will be further described below through specific implementation cases and in conjunction with the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the technical solution of the present invention.
[0032] The design depth of a comprehensive pipe gallery is 2.5m: the pipe gallery is divided into three compartments, namely: natural gas tank, comprehensive tank, and thermal cabin, with net widths of 3m, 3.2m, and 3.2m, and a net height of 2.5m. The construction project will pass through a water-rich and weak soil zone. The groundwater depth is 0.5m. According to the lithological characteristics of the stratum, it can be divided into the following layers, which are layered and described as follows:
[0033] Silty soil: the buried depth of the layer is 3.5m~5.5m, the thickness of the layer is 3.4m~5.4m, it is light gray, gray, flow-plastic, high...
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The invention discloses a construction method for a water-enriched area comprehensive pipe gallery. The construction method comprises the following construction steps that 1, a pipe gallery excavationroute is determined according to planning and design requirements; 2, freezing pipes and steel pipe concrete are obliquely underground jacked at equal intervals on the two sides of the central axis of the excavation route along the excavation route to form a pipe curtain; 3, freezing is performed on the freezing pipes, after the thickness of the freezing curtain reaches the water stopping requirement, the soil between the freezing curtain is excavated to the bottom of the curtain, and backfilling and punning are performed; 4, floating soil on the freezing curtain is cleared, and a layer of heat insulation coiled material is laid on the freezing curtain; 5, C15 plain concrete is used as a cushion layer at the bottom of a foundation pit; 6, a pipe gallery bottom plate formwork is installedon the cushion layer, moreover, a layer of ECC is poured, and then subsequent construction is performed; 7, a layer of ECC is sprayed on the outer surface of the pipe gallery after the formwork is disassembled, and maintenance is performed; and 8, after overall construction and acceptance of the pipe gallery are finished, coarse-particle gravel is adopted for backfilling. The method has the advantages that the characteristics of the pipe curtain freezing method for high bearing capacity and good water sealing performance are utilized at the same time, so that the problem of difficulty in waterstopping of the construction of the water-enriched area of the pipe gallery is solved.
Description
technical field [0001] The invention relates to the technical field of construction of a comprehensive pipe gallery, and more specifically, relates to a construction method for a comprehensive pipe gallery in a water-rich area. Background technique [0002] The comprehensive pipe gallery is a tunnel space integrating various projects such as electric power, communication, gas, heating, water supply and drainage. Because of its many advantages, it greatly facilitates the municipal construction of the city. At present, the comprehensive pipe gallery has been accelerated in China construction. The construction of the comprehensive pipe gallery generally adopts open-cut foundation pits for construction. However, when encountering soft soil layers (such as swamps and other terrains) in water-rich areas, it will be difficult to support, waterproof, and drain when using open-cut foundation pits. If these problems are not properly resolved, it will lead to abnormal construction and...
Claims
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IPC IPC(8): E02D29/045E02D3/115
CPCE02D3/115E02D29/10
Inventor 王根伟刘茂军唐婉王朝华刘存鹏
Owner GUILIN UNIVERSITY OF TECHNOLOGY