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Construction method for modifying conventional structural slab into subway bed foundation

A technology with existing structures and construction methods, applied in roads, tracks, buildings, etc., can solve the problem of steel bars not being welded vertically and horizontally, and achieve the effect of controlling risks, broad application prospects, and reducing maintenance.

Active Publication Date: 2011-06-29
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous deepening of urban construction, some subway lines need to be laid directly on the existing structural floor. At this time, in addition to the bearing capacity requirements of the structure, it is necessary to solve the problem that the steel bars are not welded vertically and horizontally.

Method used

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  • Construction method for modifying conventional structural slab into subway bed foundation
  • Construction method for modifying conventional structural slab into subway bed foundation
  • Construction method for modifying conventional structural slab into subway bed foundation

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Embodiment Construction

[0047] like figure 1 and Figure 8 As shown, the construction method of the present invention for transforming existing structural slabs into subway track bed foundations, based on the existing structural slabs, includes the following steps:

[0048] Step A), chiseling the upper surface of the existing structural plate;

[0049] Step B), pouring a reinforced concrete surface on the surface of the existing structural slab;

[0050] Step C), setting the drainage device.

[0051] Further, as Figure 9 Shown, step B) comprises the following steps:

[0052] Step B1), welding steel bar 1, and placing it on the upper surface of the existing structural plate;

[0053] Step B2), pouring concrete 2 on the surface of the existing structural slab.

[0054] Optionally, in step B1), when welding cross bars 1, such as figure 2 and image 3 As shown, the contact parts of the two are welded together, and the thickness of the weld 10 is 6mm; or as Figure 4 As shown, the two right-ang...

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Abstract

The invention discloses a construction method for modifying the conventional structural slab into subway bed foundation, which comprises the following steps of: A) performing daubing treatment on the upper surface of the conventional structural slab; B) pouring a reinforced concrete surface layer on the upper surface of the conventional structural slab; and C) arranging a drain device. The construction method can radically solve the problem of stray current protection under the condition of not changing reinforcing bars of the conventional structure at all, risks in the operation process are effectively controlled, the maintenance cost in the later period is greatly reduced, and the construction method has wide application prospect in the field of underground-ground space integrated comprehensive development.

Description

technical field [0001] The invention relates to a construction method of a subway track bed foundation, in particular to a construction method of a subway track bed foundation which obtains stray current prevention by transforming an existing structural plate. Background technique [0002] Stray current is a kind of current generated due to the influence of external conditions. For example, in the electrical high-voltage test, DC leakage or DC withstand voltage test, because the high-voltage part has a capacitance to the ground, current flows through this capacitance. Due to the grounding and leakage of various electrical equipment in electrified railways, mines, factories, and ports, a stray current cycle will also be formed in the soil. [0003] Now, because the subway has the advantages of large transportation capacity, safety and comfort, and low transportation cost, and does not interfere with ground transportation, it has become an effective way to alleviate urban tra...

Claims

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Application Information

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IPC IPC(8): E01B37/00E01B1/00
Inventor 徐正良张中杰杨红伟梁锋
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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