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Full-section overall casting construction method for circulating water pipe ditch of nuclear power plant

A technology of circulating water pipes and integral pouring, which is applied in the direction of construction, building structure, and building materials processing, etc. It can solve the problems of water seepage, the shrinkage stress of the upper concrete cannot be released, and cracks, etc., so as to ensure impermeability, easy quality assurance, The effect of reducing repair costs

Inactive Publication Date: 2012-01-18
CHINA CONSTR SECOND ENG BUREAU LTD
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Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for integral pouring of the whole section of the circulating water pipe ditch of a nuclear power plant, to solve the technical problem that the traditional same construction section is poured radially in two sections, which causes the shrinkage stress of the upper concrete to be unable to release, resulting in cracks and water seepage; and Solve the problem of formwork and anti-floating design for monolithic pouring

Method used

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  • Full-section overall casting construction method for circulating water pipe ditch of nuclear power plant
  • Full-section overall casting construction method for circulating water pipe ditch of nuclear power plant
  • Full-section overall casting construction method for circulating water pipe ditch of nuclear power plant

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Embodiment Construction

[0039] A specific embodiment of the construction method for the integral pouring of the entire section of the nuclear power plant circulating water pipe ditch, the construction process can be found in figure 1 Proceed as follows:

[0040] Step 1, the inner hole formwork 9 is processed into a complete ring at one time; when the inner hole formwork is spliced ​​on site, the annular light steel keel at the joint of each inner hole formwork must be bolted into a whole to strengthen the overall rigidity and avoid staggered joints.

[0041] Step 2, pouring the concrete cushion 1, this step is carried out simultaneously or sequentially with step 1.

[0042] Step 3: Lay a PE film sliding layer 2 on the upper surface of the concrete cushion 1; if concrete is backfilled around the pipe trench, a layer of 2mm PE film is laid on the structural wall. The PE film is polyethylene protective film.

[0043] Step 4: Install the bottom section steel support 3 of the inner hole formwork on the...

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Abstract

The invention relates to a full-section overall casting construction method for a circulating water pipe ditch of a nuclear power plant. The method comprises the following steps of: processing an inner porous template of a pipe ditch into a complete round one at one time; and arranging a PE (Polyurethane) film sliding layer on the upper surface of a concrete cushion layer. Thus, one-time overall casting of the pipe ditch is realized, meanwhile, the pipe ditch is formed through full-section overall casting molding, an anti-float measure which is bonded through a wire rope is arranged outside the pipe ditch according to the anti-float requirement of the full-section overall casting molding, construction defects such as restriction between structural concrete and cushion layer concrete during construction, production of cracks and the like are avoided, and the method can be widely applied to construction of the circulating water pipe ditch of the nuclear power plant.

Description

technical field [0001] The invention relates to a pipe ditch construction method, in particular to a construction method of a nuclear power plant circulating water pipe ditch. Background technique [0002] The circulating water pipe ditch of the nuclear power plant is bulky. The inner diameter of the circulating water pipe ditch of the CPR nuclear power plant is usually 3600mm, and the inner diameter of the circulating water pipe ditch of the EPR nuclear power plant has reached 4400mm. The traditional method is to set a horizontal construction joint in the middle of the pipe ditch, and pour a hole pipe ditch twice in the lower section and the upper section. Although this construction method is convenient for construction, the upper layer of concrete at the construction joint is constrained by the lower layer of concrete, and the shrinkage deformation stress cannot be released during the hardening process of the concrete, so that the upper layer of concrete starts to extend ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/02E04G13/00
Inventor 张志明马合生姚俊关正文崔朝旭夏芬姜会浩
Owner CHINA CONSTR SECOND ENG BUREAU LTD
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