The designer and the supervisor soon arrived at the scene, Mr. Yang called several parties involved in the construction together, ready to hold an on-site meeting, in fact, it is to stand together for a meeting, the conditions of Nanhua Town are really general, this project only has a very small on-site office, basically can not sit people!

"Now the Quartet has arrived, because it does not involve the geological survey unit, there is no invitation to the geological survey unit to participate, now I put forward the physical testing suggestions for dealing with the Nanhua Commercial Building, if there is no opinion on the Quartet, how to deal with it and wait for the test results to come out!" Teacher Yang said!

"This morning, the testing institute has carried out a physical test on the strength of the masonry mortar and the concrete strength of the beams and columns of the Nanhua Commercial Building, and the initial problem found is that the mortar strength is dispersed and the average index is low! In order to further verify whether the strength of the mortar is qualified, it is recommended to increase the detection point, increase the test sample by three times, and the specific testing area please put forward suggestions for design, and the supervision and construction party jointly participate in determining! Teacher Yang continued!

"Okay, no problem!" The designer took the lead in making a statement!

Subsequently, the supervisor, the construction party (Lu Defei) and Boss Zeng all agreed!

"Wu Cheng, Chen Qiang, you follow several parties to supervise the testing situation, and pay attention to retaining the image data!" Teacher Yang arranged!

According to Mr. Yang's arrangement, the designer expanded the testing area to the load-bearing wall of each floor, and the number of testing points increased by three times.

"I won't look at the specific data, the final report of the testing institute shall prevail, please carry out testing and calculation in strict accordance with the specifications, and please sign to confirm the objectivity and authenticity of the testing data!" Mr. Yang said that Mr. Yang's purpose is to fix the test results and get the approval of all parties, so that it is conducive to the next step of processing!

Boss Zeng, design and supervision quickly signed and confirmed, Lu Defei took the test data and looked at it, and made a few phone calls to consult, and finally signed and approved it reluctantly under the urging of Mr. Yang!

After all parties signed and approved, Mr. Yang announced the end of the meeting, Wu Cheng and Chen Qiang followed Mr. Yang back to the office, and Mr. Yang immediately called Wu Cheng and Chen Qiang to have a short meeting, reminding the two to avoid contact with Lu Defei or others in the South Urban Construction Division in recent days, and to meet and talk about things as much as possible The two of them participated together, and the location was generally set in the conference room of the Construction Bureau!

Chen Qiang and Wu Cheng took Teacher Yang's words to heart, and they knew that Teacher Yang was teaching them the experience of handling things and protecting them!

Three days later, the test report was released, and the on-site rebound test strength of the masonry mortar strength of Nanhua Commercial Building was about 8.7, which was lower than the compressive strength specified in the M10 mortar specification! If judged according to the construction drawing design, Nanhua Commercial Building is an unqualified project and should be reinforced or demolished and rebuilt!

Mr. Yang asked Chen Qiang to call Li Yang, chief engineer of the Institute of Building Sciences, and informed him to come to the Construction Bureau, Li Yang and Mr. Yang studied in the conference room for about an hour after arriving, Wu Cheng and Chen Qiang listened to the side, basically the problem solving idea of the mortar strength of Nanhua Commercial Building came out!

Mr. Yang asked Wu Cheng and Chen Qiang to inform the Quartet of Nanhua Commercial Building to come to the meeting room of the Construction Bureau immediately!

"There are two main purposes for informing you today: one is to report the test results; The second is to study solutions! Teacher Yang said!

"Sitting next to me is Mr. Li Yang, an expert in the structural identification of the Luancheng Institute of Construction and Technology, Mr. Li, the testing plan that was temporarily decided on the spot last time was also suggested by Mr. Li, and the results are out today, and what to do next is mainly Mr. Li!" Teacher Yang said!

"Hello everyone, I am Li Yang from the Institute of Building Sciences, and today I was entrusted by Mr. Yang to come over to talk about some views of Nanhua Commercial Building, but before I say it, I want to listen to the opinions of the designer!" Li Yang said!

"Today, since the leaders of the Quality Supervision Station and the Institute of Construction Science and Technology are here, everything is up to you, and we will strictly ask for comfort to do a good job in related work! However, the construction drawings of Nanhua Commercial Building have been reviewed by the design, and it is recommended to meet the design requirements as much as possible! The person in charge of the design side said!

"Does Manager Lu have any opinions?" Li Yang said!

"The South Urban Construction Division has no opinion, we are confident in our own construction quality, and we sincerely ask the Quality Supervision Station and the Construction Research Institute to give the best solution!" Lu Defei said!

Boss Zeng and the supervision unit have no new opinions!

"Okay, just listened to the opinions of several parties, I put forward three suggestions for your reference, and finally ask Mr. Yang to decide: first, the structural design of Nanhua Commercial Building should have a certain margin, the current mortar strength can meet the requirements of M7.5, whether the designer can re-calculate, to see whether the design in accordance with M7.5 can meet the requirements of structural safety, if it is, it can be solved by re-drawing review! The second is to directly do the compressive strength testing of masonry, the current testing method of the testing institute is the mortar rebound test, the actual value may be different from the compressive strength of the masonry, if the compressive strength of the masonry can meet the design needs, it can also be judged that the Nanhua commercial building is qualified! Third, if the final inspection and verification can not meet the needs of structural safety, it is recommended to reinforce, but the reinforcement of brick-concrete structure houses is not easy to do, and it is not conducive to future sales and use! That's all my advice, please ask Mr. Yang to decide! Li Yang said!

"Thank you Mr. Li for your suggestion, the specific plan is not to have the final say in the quality supervision station, Wu Cheng and Chen Qiang and I are just performing supervision duties, and we still have to participate in the construction of several parties to have the final say! However, I would like to put forward two suggestions for your reference: one is to be cautious about changing the original design according to the physical test results, because once this matter is known to the owner in the future, it will definitely cause the owner to worry and panic, unless it is absolutely necessary! Second, the masonry strength test may damage the structure of part of the load-bearing wall, how to detect and how to repair, it is recommended that the South Urban Construction Division should be done in strict accordance with the requirements of the Academy of Construction Sciences! Third, if it is really unqualified, the structural reinforcement must be carried out, and the reinforcement plan is proposed by Boss Zeng, the designer and the Institute of Construction Science and Technology! Teacher Yang said!

"Mr. Yang, Mr. Li, Mr. Zeng, I suggest that the masonry compressive strength entity test should be carried out first, and then the next step of work will be arranged according to the test results!" Lu Defei said first, because this is the easiest verification scheme for him, and the other schemes are too widespread!

"I also recommend that the compressive strength of the masonry be tested first, so as not to delay the construction period and not affect the delivery of the Nanhua Commercial Building!" Boss Zeng also agreed!

"I also agree with Manager Lu's suggestion, please consider the designer, Mr. Li and Mr. Yang!" The supervising party also agrees with Lu Defei's opinion!

"I also recommend doing the masonry compressive strength test directly!" The designer immediately agreed!

Since the responsible subjects have unanimous opinions, it seems that they can only do the masonry compressive strength test first!

"Since the four parties involved in the construction have agreed, I have no opinion, but I suggest that the testing institute of the Institute of Construction Science and Technology be asked to conduct the test to ensure authority, and the relevant costs are responsible for the South Urban Construction Division!" Teacher Yang added!

All parties agreed after listening to Mr. Yang's opinions, and the test was carried out quickly, and the Institute of Construction Science and Technology and the designer selected the key load-bearing walls on the first and second floors with the largest load-bearing capacity for sampling and testing, and the test results were finally able to meet the requirements of the design specifications! However, there is also a certain possibility in itself, because the rebound tester detection is an indirect detection method, and the physical inspection of masonry compressive strength is to take out a stressed unit from the load-bearing wall for compressive strength testing, which is more in line with the actual situation, just like the load test will be carried out before the bridge is put into use, these detection methods are the most direct and accurate!

Mr. Yang organized the five parties to participate in the construction of the main structure according to the test results of the Institute of Construction Science and Technology, and after passing the acceptance, Lu Defei took the initiative to shake hands with Mr. Yang and expressed his gratitude!

How can Lu Defei be so confident that he will be able to pass the test?