Initial certification: construction party breaches conceal testing report

Guangzhou metro line North extension section of tunnel liaison engineering quality mystery yesterday with preliminary conclusions.

Guangzhou construction Commission preliminary construction party exists will detect an unqualified report to the project owner, supervisor and design side hide.

Guangzhou Municipal construction Commission staff indicated that they had already started on Metro line North extension of period of engineering quality problems.

According to early city construction engineering quality supervision station's preliminary findings, construction unit has some hidden concrete strength testing can not reach the design strength of the fact that belong to the violations.

The third test, three non-compliance

According to a detailed understanding, August 31, 2009, after completion of civil works, construction works commissioned by Guangzhou Guangzhouditiezonggongsi quality security testing Center co., Ltd., on the northern extension of the period of construction of 6 standard 【 Jiahe station — Dragon return station of shield (2) 】 civil works conducted the first test.

After that, the detection of the object that is a liaison channels, connected to the North and the bi-directional between the two main tunnel.

The results of this test in the test center on September 4, issued by the rebound of concrete compressive strength report rendering.

According to requirements, engineering design strength grade and C30, after the examination, the six points "are now age concrete strength (Mpa) respectively 30.9, 21.9, 23.6, 24.5, 27.6, 28.7, only one point eligible".

This report is a seasonal construction party unable to project quality sake.

The report presented a week later, on 11 September, construction — — Beijing Great Wall Bilfinger Berger to find another home inspection bodies, engineering conduct a second test.

September 21, Guangzhou-Guangzhou engineering quality supervision and testing center in the core drilling assay for detection of concrete strength report concluded that this testing from three-point sampling, concluded that "component strength values" as the 25.5Mpa, has not yet reached the design strength.

Due to the detection of construction inspection bodies commissioned, in accordance with the provisions of the construction industry, construction unit in this report revealed that the test results are not eligible, you must submit the report owner — — Guangzhou Metro Corporation, overseeing party — Handan coal in China construction management consulting co., Ltd., as well as Design — — Institute of Guangdong Province in heavy industry.

However, after the impact the Corporation's officers said they until this liaison channels for acceptance, has seen the construction party delegates detection companies testing the outcome of the examination report.

The Corporation, and delegate construction party, respectively, of the test center are doing testing, have indicated that project is not fulfilled.

And 29 September, the construction side once again entrust Guangzhou engineering quality supervision Test Center for engineering made a test. Concluded that the "component strength values" as the 25.2Mpa. The third draw contact channel concrete strength testing does not meet the design standards of the conclusions.

There is no evidence that the construction will this report available to the owners, management and design of the parties.

North extension of period of final acceptance also depends on whether the investigation

In the light of the foregoing, survey finds there to hide project construction party did not report reaching.

Guangzhou Municipal construction Committee said, the next step will start again on project quality, construction, inspection requirements, design, owner supervision, and so the parties produce engineering information and quality inspection reports, by specialized technicians analyze findings to determine whether the quality of security breaches is needed to reinforce the means of compensation.

It is understood that, if the results show that the quality meets the safety requirements, even if you do not meet the design requirements, but also to can the scope of acceptance.

If the final discovery project did not meet security requirements, how to deal with the construction unit, is a fine, qualification points or prohibit bidding again, depending on the outcome of the construction Committee investigation.

Guangzhou Municipal construction Commission staff also emphasized that Guangzhou metro line North extension of period of the overall project is still fails the final acceptance, the final acceptance will depend on whether the construction Committee's decision on the final results of the survey.

Prior to this media by Guangzhou procuratorate has anti-corruption departments involved in the investigation of this dispute, subway safety aspects, the public prosecutor's Office as of late, the Prosecutor's Office not to intervene on behalf of the "organization", as for incident investigation whether intervention yesterday to begin, you need to be confirmed.

With regard to the report of the three questions

Queries 1

Whether the Corporation had known construction party has two reports?

Although the Guangzhou Municipal construction Committee has already made preliminary conclusion that line 3 of the northern extension of the period of civil engineering and construction units, commissioned testing company detect works not qualified, does not notify the result to the owner, supervisor and design side, and thus considers that the construction unit exists to conceal behaviors.

But the two reports of the mystery remains.

10th, the media has pointed out that guangzhouditiezonggongsi security sector a Deputy Manager said that the Corporation on the two reports and uninformed, also considered the construction party cheated.

11 September, the Corporation also has staff that they contact the channel until the engineering acceptance as a child, still has not seen the construction party delegate inspection organization of the examination report.

However, the Corporation before the last two days on many occasions stated that, while the construction unit when the child works acceptance has not submitted all the inspection report, but the Corporation in August and September, two instrumented all know this liaison channel concrete strength and design requires the existence of deviations, not only knowing acceptance.

The Corporation has repeatedly emphasized had known passage does not reach the design requirements.

As a result of the first inspection report is commissioned by the Corporation, its detection agencies had known that works not compliance also reasonable.

But for Shi

Work units are concealed in addition to the two reports, as well as on the concealment of views, the MTR but no detailed instructions.

Questions 2

Construction of the party's intention to conceal the report?

According to the three test reports made by time and commissioned party, the oldest delegate Guangzhou construction quality test security and test center co., Ltd., the earliest date on which this project does not meet the design requirements.

There are professional analysis, construction party was informed of the results of the first report, apparently want to entrust another detection agencies redetected, but otherwise repeated twice in the test, the results still have not reached the design requirements, at this point, the construction is very likely that the Corporation has adopted the first report that the same result, therefore, to the effect that no new report results to notify the Corporation.

But the industry also means that, even so, it can only show the effect of construction party, there is no strict implementation of the trade provisions, and you cannot escape the responsibility of concealing the report.

Questions 3

Construction party ever attempted to report melted?

According to Metro line North extension of period of this quality safety controversy message source clock kit chapter in Bowen said, he has worked with own detection unit heads together, hear the construction party to the person to call, the call to the inspection report back to the testing center, but Bell JI Zhang said refusal on the spot.

To this end, the heads of the institutions has not been detected.

Yesterday the journalists trying to find construction of Guangzhou project Department, but the Office was a lock to be locked from the outside. Previously the project Department has stated that staff had been on leave, but caused a public outcry in this event, yet to project officers in Office locations, so that they are tried will report back to the testing institution so far unknown.

Expert advice

Vulnerability?

A bit in the construction industry for more than 10 years of senior professionals to reporters on the test results appear unqualified samples, the formal process should get operations — — —

No problem

Sample submission

Construction units must be under the supervision of the project management unit (specific is the project management unit is responsible for sending examiner), from the construction site of the sample to the inspection unit.

If there is no supervision units of supervision, construction unit it is possible to do a shoddy, will advance qualified samples sent for testing, has lost its significance, while at the same time, if there is no supervision units of supervision, inspection report is not valid.

There are loopholes

Take the test report

Current construction industry internal down did not provide for the construction of units for testing report, be sure to have the supervisor accompany, this is really a vulnerability, the Metro site quality accident also illustrates this link has a vulnerability can drill.

Construction units separately retrieve report may modify or hide report on yourself, so owners and design units according to manipulated test results to make the next professional judgement, leaving behind the quality of the project.

Undetermined

Whether non-conformity

Once detected an unqualified report, construction and supervision unit should provide quality inspection station, inspection stations, to the attention of the owners, design, design professional judgement is important, if design view samples while not achieve their design requirements, but it still meets the safety requirements, or that the quality of the project.

But once you find the survey sample was neither meet the design requirements and safety requirements are not met, then the design of the unit and the landlord, the supervision unit will expand the detection range, such as the original sampling sample size to 20%, and then test again to identify non-compliant projects section is great; if the expansion of 20% after or some sample non-compliant, you can once again expanded the number of samples, such as to 50% or even 100%.

If you are not qualified, comprehensive judgment failed because the raw materials, processing link problems or site problem, find the cause before setting up. At this time for a careful design of the unit and the landlord, you can then invite external experts to fill method checks and technical review, determine the programmes feasible after inspection and acceptance of construction and, OK no problem after they complete the process.