Method for determining construction and curing methods for mass concrete structures

A technology of large-volume concrete and concrete structures, applied in infrastructure engineering, construction, etc., can solve the problems of lack of individual differences in physical projects, single maintenance technical indicators, and difficulty in guaranteeing the quality of concrete construction, etc.

A technology of large-volume concrete and concrete structures, applied in infrastructure engineering, construction, etc., can solve the problems of lack of individual differences in physical projects, single maintenance technical indicators, and difficulty in guaranteeing the quality of concrete construction, etc.

CN105544578AActive Publication Date: 2016-05-04CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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  • Method for determining construction and curing methods for mass concrete structures
  • Method for determining construction and curing methods for mass concrete structures
  • Method for determining construction and curing methods for mass concrete structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Embodiment 1. For a large-volume concrete structure that is very thick or needs to be poured in two layers due to the construction technology.

[0084] For example, the K2 and K3 projects are two nuclear power plants aided by China to the southern port city of Karachi in Pakistan, using the third-generation technology ACP1000 nuclear reactor with independent intellectual property rights of China National Nuclear Corporation, with a total installed capacity of 2,200 megawatts. The foundation of the nuclear reactor is a circular structure with an outer radius of 28.0m, and a regular hexagonal pit with a depth of 1.6m is opened in the middle. The thickness is 6.9m, and the thickness of the rest is about 4.2m. The total amount of concrete is about 12000m 3 .

[0085] In view of the strict requirements on cracks in the structure of the nuclear power plant, the foundation of the K2 power plant will be poured in two layers after various demonstrations and actual construction ...

Embodiment 2

[0162] Embodiment two, for the large-volume concrete structure that only needs to be poured once.

[0163] In this embodiment, since the required large-volume concrete structure can be obtained only by one integral pouring, the step 11 may include the following steps:

[0164] Step 201, analyzing the temperature field of the integrally poured concrete structure to obtain a first analysis result;

[0165] Step 202: Transform the thermal model into a structural model according to the first analysis result to analyze the temperature stress field of the overall structure to obtain the structural temperature stress.

[0166] Wherein, the above-mentioned steps 201 and 202 are respectively the same as or similar to the above-mentioned steps 111 and 112, so details are not repeated here.

Embodiment 3

[0167] Embodiment 3, for the large-volume concrete structure that is very thick or needs to be poured in three layers due to the construction technology.

[0168] In this embodiment, since three pourings are required to obtain the required large-volume concrete structure, the step 11 may include the following steps:

[0169] Step 301, analyzing the temperature field of the concrete structure poured in the first layer to obtain the first analysis result;

[0170] Step 302, transforming the thermal model into a structural model according to the first analysis result to analyze the temperature and stress field of the overall structure, and obtain the second analysis result;

[0171] Step 303, based on the poured concrete structure of the first layer, analyze the temperature field of the concrete structure of the first layer and the second layer, and obtain the third analysis result;

[0172] Step 304, transforming the thermal model into an overall structural model according to t...

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Abstract

The invention provides a method for determining construction and curing methods for mass concrete structures. The method includes the steps that the structure temperature field computational analysis is performed on the mass concrete structures, and a thermal model is transformed to a structural model according to an analysis result so as to perform temperature stress field analysis to obtain a structure temperature stress field; structure temperature stress is compared with allowed tensile strength of concrete in the corresponding age, and a specific curing mode and corresponding technical indexes or an optimal structure form are adjusted and determined according to a comparison result; temperature control monitoring indexes of concrete curing are determined according to the corresponding temperature states of the structure temperature stress field; and a specific implementation mode of structure crack resistance and a concrete construction and curing monitoring scheme are determined according to the temperature stress states. By means of the method for determining the construction and curing methods for the mass concrete structures, the specific cutting mode, technical indexes and monitoring indexes can be determined according to the specific actual conditions of mass concrete structure pouring, the construction quality of the concrete structures are effectively guaranteed, and the risks of concrete cracking are greatly prevented.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for determining a construction and maintenance method for a large-volume concrete structure. Background technique [0002] The construction quality requirements of concrete are closely related to the use of the structure. In the past, buildings with strict quality requirements for concrete construction were usually poured multiple times by reducing the pouring volume, such as the M310 nuclear power reactor plant imported from France by my country. The raft foundation of the shielding structure has always adopted a layered and segmented pouring mode in the past. Now, with the vigorous development of nuclear power construction, the need to reduce the construction period and the improvement of the existing construction capacity, it is imperative to pour large-scale concrete as a whole . It is obvious that under the premise of ensuring that the construction quality ...

Claims

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Application Information

Patent Timeline
04 May 2016
Publication
CN105544578A
IPC
E02D27/01; E02D15/02
CPC
E02D15/02; E02D27/01
Inventors
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