Ocean Flower Island No. 3 Island Kapok Garden Community high-rise building. Chen Logo/photo
As the load-bearing columns, load-bearing walls and beams of the basement are the foundation of the entire high-rise building, the owner is concerned that the situation will continue to deteriorate and endanger the entire high-rise building.
China Housing Daily reporter Chen Logo reported on Ocean Flower Island
Because of the "passing by" with the provincial expert group, Sister Qing and other owners of Ocean Flower Island suddenly felt a little lost.
On the afternoon of May 9, the Hainan Provincial Department of Housing and Urban-Rural Development appointed an expert group to rush to the Kapok Garden Community on Island No. 3 of Ocean Flower Island to conduct an on-site survey on the problems reported by the owners that the load-bearing columns of the underground garage in the community have problems such as surface peeling and exposed and rusty steel bars.
Previously, the project construction unit has entrusted a testing agency to sample and test some load-bearing columns and load-bearing walls in the basement. The test report shows that 9 of the 11 concrete compressive strength specimens are unqualified; Among the 4 samples tested for chloride ion content, 2 were unqualified, and the chloride ion content of one of the samples was as high as 1.488%, which was seriously exceeded.
On May 11, the relevant person in charge of the Danzhou Housing and Urban-Rural Development Department said in an interview with a reporter from China Real Estate News that the test report issued by the testing agency entrusted by the construction party is not authoritative, and they will entrust a third-party authoritative testing agency to conduct testing, and the testing conclusion will be used as the basis for the argumentation of the expert group.
On May 12, the Danzhou Municipal Bureau of Housing and Urban-Rural Development issued the "Circular on the Quality of the Underground Garage of the Kapok Garden Community on Ocean Flower Island", stating that the bureau will formulate a scientific and effective disposal plan based on expert argumentation and properly solve the problems reported by netizens.
Since the beginning of March this year, the owners of the Kapok Garden Community on Island No. 3 of Ocean Flower Island have continuously complained about the large-scale cracking of the underground garage columns and load-bearing walls in the community, the pulverization of concrete, and the exposed and serious rust of steel bars through platforms such as the "leadership message board" and the 12345 hotline. In the past few days, the reporter has restored the whole story of the incident through on-site visits and interviews with relevant units.
The steel bars in the basement are bare and corroded
The load-bearing column of the basement of the Kapok Garden Community on Ocean Flower Island. Chen Logo/photo
The load-bearing wall of the basement of the Kapok Garden Community on Ocean Flower Island is a large piece of concrete. Chen Logo/photo
"At that time, we didn't think about the problem of steel corrosion, but we just thought about whether the water would collapse the building." On the morning of May 9, Sister Qing and others took reporters to inspect the basement of their community.
Sister Qing is one of the owner's representatives of the Kapok Garden Community on Island 3 of Ocean Flower Island, and "Sister Qing" is what other owners call her. As a retired teacher from a university, her enthusiasm has a strong appeal.
Sister Qing is one of the first buyers of the "super artificial island", Ocean Flower Island in Hainan, China.
On December 28, 2015, Ocean Flower Island held a grand opening and subscription ceremony, and buyers from all over the country crowded at the sales and exhibition center on the other side of Ocean Flower Island. At a glance, 600 meters away from the shore, the construction site of Ocean Flower Island is lined up with large machinery and is under intense construction.
In the sales exhibition center located on the shore, the blue sky dome and the magnificent planning model are quite shocking; Under the white-gloved security personnel to maintain order, Sister Qing was crowded in the crowded room selection team.
Like many out-of-town home buyers, Ocean Flower Island is the destination chosen by Sister Qing for retirement. After the handover of the Kapok Garden, she spends most of the year on Ocean Flower Island.
Before discovering the "dangerous situation" of the basement, the owners of the Kapok Orchard were defending their rights against the problem of unfinished construction sewage in the community and the brutal acquisition of land on vacant land near the community.
"Building 421 is an unfinished building, and the construction of the project will be unfinished until it reaches plus or minus zero." Sister Qing and other owners told reporters that some people planted vegetables on the unfinished construction site, and watered the vegetables with strong smelly sewage, which made the residents very disgusted, and the basement was under the "vegetable field".
All the basements of the Kapok Garden are connected, and Building 428 is next to the unfinished Building 421.
"It's dark and damp in the basement, and most of the residents rarely go down." An owner surnamed Liu told reporters that at the beginning of January this year, an owner inadvertently went to the basement and found that the reinforced concrete layer of the roof of the basement of Building 421 had rotted into a hole. ”
In addition to this, the owners also found a large amount of black-brown sewage in the basement of the unfinished Building 421. This is also the case in the basements of buildings 428, 417 and 412.
The owner who inspected the basement didn't care about the situation, but just wondered if the water would collapse the building.
At the beginning of February, some owners posted photos and videos of the basement to the owners of the community, but they still did not attract too much attention from the owners. An owner who understands architecture went to the basement to confirm, and then said in the group, "This is not ordinary sewage", which immediately aroused the vigilance of the owner.
The steel corroded columns in the basement of the Kapok Garden Community on Ocean Flower Island. Chen Logo/photo
The owners went to the basement of the community again to check and found that the surface layers of the columns, load-bearing walls and other buildings of No. 428 were cracked. The bare steel bars are rusty and the surface layer has become powdery.
Sister Qing told reporters that there are construction experts among the owners of the community, and they think that this problem is somewhat serious. At this time, the owners suddenly felt the seriousness of the problem.
"Chloride levels are seriously exceeded"
The "rusty water" in the basement of the Kapok Garden Community on Ocean Flower Island. Chen Logo/photo
There is stagnant water flowing out of the basement electrical box of the Kapok Garden Community on Ocean Flower Island. Chen Logo/photo
The owners of the community said that the black-brown sewage they found was actually "rusty water" from steel bars.
"The surface layer is bulging, the cement blocks are falling down in large chunks, and the steel bars inside are also 'crispy'." The representative of the rights protection owners told reporters that in addition to the five unfinished buildings, the community has completed and delivered 19 high-rise buildings ranging from 26 to 38 floors, with about 3,000 households.
As the load-bearing columns, load-bearing walls and beams of the basement are the foundation of the entire high-rise building, the owner is concerned that the situation will continue to deteriorate and endanger the entire high-rise building.
In this regard, the owner of the Kapok Garden suspects that there are engineering quality problems in the building, such as the inclusion of "sea sand buildings", but there is no conclusive evidence to directly support this claim.
Since the beginning of March this year, some owners have begun to complain about the problems in the basement of the Kapok Garden through the 12345 hotline, leadership message boards and other platforms. After that, the relevant person in charge of the Danzhou Municipal Housing and Urban-Rural Development Bureau led a team to the scene to inspect, and convened the construction party, the contractor, the supervision unit and other parties to hold a coordination meeting.
The column sampled from the basement of the Kapok Garden Community on Ocean Flower Island. Chen Logo/photo
Entrusted by the construction unit, from April 7, Haikou Construction Engineering Quality Inspection Center and Hainan Construction Research Institute Co., Ltd., two third-party testing institutions, sampled and tested the columns and load-bearing walls of the basement of the Kapok Garden.
Sister Qing and other owner's representatives told reporters that due to the concerns and worries of the owners of the community about the testing process, they supervised the testing agency on site to seal and pack the core samples, and the outer packaging of each core sample was marked, and the five owners also made a special trip from Ocean Flower Island all the way to Haikou.
"We stayed in Haikou for a total of 5 days, and we followed the third-party testing agency throughout the whole process." The owner's representative told reporters that without the presence of the owner, the outer packaging of the sample cannot be opened without authorization, "only when we see the sample on the testing instrument can we rest assured." ”
The reporter learned that the test items include the spacing of structural solid steel bars, concrete compressive strength, concrete chloride ion content, etc.
"The test report shows that there are 11 concrete compressive strength specimens, and 9 of them are unqualified; There were 4 samples of chloride ion content testing, and 2 of them were unqualified, and the chloride ion content of concrete in one of the samples was as high as 1.488% (the national standard value should be ≤ 0.3% in a dry environment), which was a serious exceedance. Sister Qing told reporters.
"The chloride ion content of concrete exceeds the standard, and the harm to concrete and steel bar is obvious." Professionals from a construction supervision unit in Haikou told reporters that chloride ions in concrete mainly come from chloride salts, sand, water, etc. in cement raw materials, and the chloride ion content exceeds the standard, which will cause corrosion to the steel bars in the concrete and reduce the chemical resistance and strength of the concrete.
The basement entrance and exit are closed
Corroded steel bars in the basement of the Kapok Garden Community on Ocean Flower Island. Chen Logo/photo
On May 9, the reporter visited the basement of the community with the owner of the Kapok Garden Community on Island No. 3 of Ocean Flower Island. Although parts of the basement have been repaired, the situation described by the owner is still everywhere.
The basement of the unfinished Building 421 is humid, the foundation pit of the elevator shaft has been seriously waterlogged, and the load-bearing column walls and roof have fallen off concrete, and the steel bars are exposed and corroded. Buildings 428, 417, 412 and 413, which are similar to Building 421, also have the surface concrete peeling off, and the steel bars are exposed and corroded.
"It's only been more than three months since we discovered the problem with the basement, and we feel that the situation is getting worse and worse." The owner who took the reporter to check the scene told the reporter that from the outside, some places are just bulging and dotted black spots, but in fact, when you touch something, large pieces fall off, and the steel bars inside are also exposed, and most of the steel bars have been corroded.
When the reporter visited the scene, he found that the closer he got to the basement of Building 421, which was unfinished, the situation was very serious. However, in the basement of other buildings a little farther away, there are also regular or irregular brown dots on the load-bearing column walls, and the rusted steel bars can be seen when the dots are scraped with a key piece.
What worries the owners is that in some basements, water flows out of the cracks of the switches in a linear manner, and some of the switches are in a closed state, which is very dangerous. "Where does this water come from?" The owners think it's a mystery to be solved.
At about 3 o'clock in the afternoon on May 9, the reporter returned to the ground with the owner again to check the basement, and saw two cars parked on the side of the road in the community.
After the owner asked all the way, it was learned that the staff of the Danzhou Municipal Housing and Urban-Rural Development Bureau accompanied the provincial expert group to the site for investigation. "We've already seen the basement." The relevant personnel did not want to communicate too much with the owner, and after checking on the first floor, they hurriedly left in the car.
Because she went upstairs to get materials and "passed by" the expert group, Sister Qing was so angry about this that she asked the department contact person in the WeChat communication group, "Why don't you let the experts in the province meet with the owner". The latter responded, "in order not to disturb the progress of the expert group's on-site survey".
On May 10, the reporter received confirmation from the Hainan Provincial Department of Housing and Urban-Rural Development that the department did send an expert group to the site of Ocean Flower Island.
The next day, the relevant person in charge of the Danzhou Municipal Housing and Urban-Rural Development Department said in an interview with reporters that the expert group has completed the on-site survey work, and the Danzhou Municipal Housing and Urban-Rural Development Bureau will entrust a third-party authoritative testing agency to conduct the test in the next step, and the test results will be used as the basis for the demonstration of the expert group.
Regarding the previous test report issued by a third-party testing agency, the person in charge said that it could not be used as a basis for the argumentation of the expert group, "The previous test report was commissioned by the construction party and was not authoritative." ”
On the same day, the reporter sent an interview outline to the contractor about the basement problem reported by the owner of the kapok plantation, but they politely declined the reporter's interview, saying that "everything is subject to the official news."
On May 12, the Danzhou Municipal Bureau of Housing and Urban-Rural Development issued the "Notice on the Quality of the Underground Garage of the Sea Flower Island Kapok Garden Community" on the local media, saying that recently, some netizens reported that there are concrete protective layers falling off and steel rust in the underground garage of the Sea Flower Island Kapok Garden Community. The Danzhou Municipal Bureau of Housing and Urban-Rural Development will organize relevant experts to demonstrate according to the test results, formulate a scientific and effective disposal plan, and properly solve the problems reported by netizens.
On May 13, the owner of the Kapok Garden told reporters that the expert group went to the basement of the community again to investigate, but still did not have any communication with the owner. "At present, the entrance and exit of the basement of the community are closed, and outsiders, including media reporters, cannot enter at will." The owner told reporters.