Yesterday, the wechat public account “civil bar” published “will the wind of precast buildings be intercepted?” I.

The so-called “special situation” is that some local governments (even including the Ministry of construction and the central government) forcibly promote precast PC buildings and become a politically correct ideology, So that few people in the industry dare to say “no” “In terms of safety, quality, quality, cost and other aspects, precast PC is obviously inferior to cast-in-situ RC.

See the figure below: the picture comes from the “civil bar” and the message comes from Nanjing Construction Commission and quality supervision station.

Lifting Eye Anchor

How on earth was it kidnapped into the national will? Precast concrete PC was originally a technology eliminated in the 1960s and 1970s, but in recent years, a large number of experts and professors studying in Japan are popularizing Japan’s precast concrete.

If the application of a technology has no cost advantage and reduces the safety and quality level, as a rational economic man, there is no reason not to use this technology at all, unless there are special circumstances.

Find the path to the true proportion of precast PC buildings in Japan 2.1 enter the official statistics website of Japan 2.1.1 search statistics.

Therefore, China There is nothing wrong with benchmarking.

Introduction: last December, wechat public account “wechat” published the “feasibility study on precast buildings”, pointing out that some local governments forced precast buildings, pointing out that precast buildings did not improve productivity, did not have cost advantages, or even significantly increased costs, and the quality could not be guaranteed, so they did not have promotion value.

Even small Japan should learn from its strengths.

1.

Obviously, it is a fair decision, but concealment has become a hidden front.

See the website of Japan: https://www.e-stat.go.jp/2.1.1.1 Enter – organize the investigation of statistics by ministry according to the classification of government organizations 2.1.1.2 – enter the Ministry of land and communications 2.1.1.3 – construction work statistics survey (work), including: construction work statistics survey, Public (update) date February 28, 2018 [2578 pieces] residential work statistics [3342 pieces] 2.1.1.4 entry – residential work statistics [3342 pieces] 2.1.1.5 selection – year [211 pieces] – 2.1.2, 2017.

However, is the proportion of precast PC buildings in Japan really so high? 2.

according to the requirements of XX Municipal Construction Committee, when the project is submitted for drawing review, the precast buildings shall not use vertical stressed components (i.e.

frame columns and shear walls); For the project under drawing review, it shall be adjusted that there is no vertical stressed component for review; For the projects that have passed the drawing review, it is also recommended to make design changes, cancel the vertical stressed components and adopt the cast form.