1. The geological conditions in this area are unfavorable, extremely complicated and changeable, and the construction may be very difficult. In order to ensure the engineering quality, the general contractor decided to contract the foundation engineering construction to the professional foundation engineering company C.
2. The quality standard of the whole project is extremely high, and the construction unit requires the supervision organization to ensure the quality of the main materials and equipment used in the house.
3. The construction unit also requires the supervision organization to strictly control the construction quality of each working procedure in the construction of the main project, whether it is the reinforced concrete main structure or the fine decoration project, so as to achieve the high standard and high quality assurance rate stipulated in the contract.
4. The strength of concrete mixture, mortar material, reinforced concrete load-bearing structure and load-bearing weld required by the construction unit must meet the quality requirements.
5. In the early stage of the construction of the expressway branch line connecting the conference center with the urban area and the main expressways in the city, the supervision engineer found that the quality of the subgrade filled by the construction team that contracted the subgrade engineering did not meet the specified quality requirements. The supervision engineer ordered the construction to be suspended and asked for rework. However, the contractor delayed this and refused to rework it through relevant parties? Persuade? The supervisor agreed not to rework, but both parties insisted for a long time, which affected the normal progress of the project.
6. In the process of pouring concrete on a reinforced concrete floor, the civil supervision engineer learned that although the reinforcement construction of the floor has passed the supervision engineer's inspection and approval visa, the design of embedded electrical concealed pipes has not informed the electrical supervision engineer to check the visa. From At this time, one-fifth of the total concrete has been poured.
Question:
1. What are the main means for the supervision engineer to control the quality of the construction process?
2. In view of the above situation, what means do you think the supervision engineer should use to ensure the quality? Please answer one by one.
3, in order to ensure the quality of work, under what circumstances, the chief supervision engineer has the right to exercise quality control, issued a shutdown order, and timely quality control?
Reference answer:
1, supervision engineer in the process of construction quality control means mainly include the following five aspects:
(1) Control by reviewing relevant technical documents, reports or statements;
(2) Control by issuing mandatory documents and general management documents (generally in the form of notice);
(3) Control through on-site supervision and inspection (including on-site supervision, patrol inspection and equal inspection);
(4) Carry out work and activities in accordance with the prescribed procedures through the prescribed quality monitoring procedures;
(5) Control by paying the right of control.
2. In view of the six situations mentioned in the title, the supervision engineer should take the following measures to control (answer item by item).
(1) First of all, control the subcontractor's qualification (means of auditing documents and reports) by auditing the subcontractor's qualification documents; Then, by reviewing the construction scheme submitted by the general contractor (actually the foundation construction scheme proposed by the subcontractor), the foundation construction technology is controlled to ensure the foundation construction quality.
(2) In order to ensure the quality of materials and equipment entering the site, the following measures can be taken:
(1) Control by reviewing the ex-factory certificates, material test sheets, test reports and other documents, statements and reports of materials and equipment;
② Conduct on-site supervision, inspection and control through parallel inspection. Source:.
(3) Strictly control the construction quality of each working procedure by formulating quality monitoring procedures; Strictly control the construction process through on-site inspection and on-site supervision
(4) Control the quality of concrete mixture, mortar and load-bearing structure through on-site supervision and witness sampling.
(5) Give instructions to stop the construction, and stop the unqualified fill from expanding; Urge the contractor to rework by stopping the payment of project funds.
(6) To prevent the deterioration and expansion of quality problems by issuing instructions to suspend construction; Investigate and inspect by issuing quality notice, and put forward handling opinions; Through the review and approval of the treatment plan, the rework or rectification instructions are issued to carry out quality control.
3, in the following cases, the chief supervision engineer has the right to stop working instructions, quality control in a timely manner:
(1) The contractor failed to reverse the abnormal quality during the construction;
(2) The concealed works are closed without passing the inspection according to law;
(3) The quality problems that have occurred have been delayed, or the quality of work may continue to develop without stopping;
(4) Changing the design or modifying the drawings without the approval of the supervision engineer;
(5) Personnel who have not passed the statutory examination or failed the examination enter the site for construction;
(6) The materials and semi-finished products used have not passed the inspection or entered the site for use;
(7) Subcontractors who have not been approved by the supervisor or whose qualifications are unqualified enter the construction without authorization.
(5) The sewage treatment plant project undertaken by the construction unit has been approved. The construction scale of this project is secondary treatment, with a daily treatment capacity of 410.5 million cubic meters, and the total cost is about 290 million yuan, including 654.38+0.8 billion yuan for civil engineering. The sources of project funds are: 35% self-owned funds and 65% bank loans.
This project invites qualified potential bidders for civil engineering construction to participate in bidding. The bidding applicant must have the ability to undertake the bidding project and the first-class qualification of municipal public works general contracting issued by the construction administrative department, and the third-class and above qualification of foundation and foundation engineering. In the past two years, he has undertaken more than two (including two) main construction projects of sewage treatment plants with a scale of 654.38+10,000 cubic meters. At the same time, as a consortium, the pile foundation construction unit should have three or more pile foundation construction qualifications, and the performance of related projects in the past two years is good.
question
1. What are the bidding methods for construction projects? What are their characteristics?
2. Which construction projects must be awarded by tender?
3. What projects can be directly contracted without bidding?
Test center/site
Bidding mode.
point analysis
There are two ways of bidding for construction projects: open bidding and invitation bidding. This case mainly investigates the necessary and unnecessary situations of bidding, and candidates should clearly distinguish between them.
Reference answer
1. There are two ways to bid for construction projects.
The advantages of public bidding are: many contractors, wide scope and fierce competition. Owners have more choices and can obtain competitive quotations, which can improve the quality of the project and shorten the construction period. Its disadvantages are: due to the large number of applicants, it is generally necessary to set up pre-qualification procedures, the workload of bid evaluation is also large, the bidding time is long and the cost is high.
The advantages of inviting bidding are: there is no need to issue a bidding announcement and set up a pre-qualification procedure, which saves bidding cost and time; Because of better understanding of the bidder's past performance and performance ability, the contractor's default risk in the process of contract performance is reduced. In order to reflect the open competition and facilitate the tenderer to select the bidder with the strongest comprehensive ability to win the bid, it is still required to submit relevant certification materials indicating the bidder's qualification ability in bidding as one of the evaluation contents in the bid evaluation (usually called post-qualification review). Its disadvantage is that the invitation scope is small and the selection scope is narrow, which may exclude some potential bidders who are competitive in technology or quotation, so the intensity of bidding competition is relatively poor.
2. According to the provisions of Article 3 of the Bidding Law, bidding must be conducted for the following construction projects in People's Republic of China (PRC), including engineering survey, design, construction, supervision and procurement of important equipment and materials related to engineering construction:
(1) Large-scale infrastructure, public utilities and other projects related to social interests and public safety;
(2) Projects that are wholly or partially invested with state-owned funds or financed by the state;
(3) Projects that use loans or aid funds from international organizations or foreign governments.
3. In accordance with the provisions of the tendering and bidding methods for construction projects, under any of the following circumstances, the construction task can be directly entrusted without bidding:
(1) involving national security, state secrets or emergency rescue and disaster relief, which is not suitable for bidding;
(2) Belonging to the use of poverty alleviation funds to implement work-for-work relief, which requires the use of migrant workers;
(3) The main construction technology adopts specific patents or proprietary technologies;
(four) the project built by the construction enterprise for its own use, and the qualification grade of the construction enterprise meets the engineering requirements;
(5) The original winning bidder still has the ability to contract the newly-added subsidiary small-scale projects or the main storey-adding projects under construction;
(6) Other circumstances stipulated by laws and administrative regulations.
(6) A supervision unit undertook the construction supervision of an industrial project. After bidding, the construction unit chooses construction units A and B to undertake the construction of blocks A and B respectively, and signs construction contracts with them according to the Construction Contract for Construction Projects (Model Text). The construction unit and the construction unit B agreed in the contract that the construction unit is responsible for purchasing part of the equipment needed for Bid B. The construction unit B subcontracts the installation project of Bid B to the construction unit C according to the normal procedure. During the construction, the following events occurred:
Event 1: when the construction unit purchased boiler equipment in bid B, the equipment manufacturer proposed that the installation by its own construction team would better ensure the quality, so the construction unit signed a supply and installation contract with the equipment manufacturer and informed the supervision unit and the construction unit B. ..
Event 2: According to the feedback from the site and the analysis of quality records, the chief supervision engineer has doubts about the quality of a part of the concealed works in Bid A, and then instructs the construction unit A to suspend the construction and ask for stripping inspection. A construction unit said that this part of concealed works has passed the acceptance of professional supervision engineers. If peeling inspection is carried out, the supervision unit shall compensate for the losses caused thereby and extend the construction period accordingly.
Event 3: When the professional supervision engineer inspected the power distribution equipment entering Bid B, he found that some of the equipment purchased by the construction unit was unqualified, and the construction unit replaced the equipment, which led to the shutdown of the construction unit C. Therefore, the construction unit C sent a letter to the supervision unit asking for compensation for the losses it suffered due to the forced shutdown and extending the construction period.
Question:
1. 1 incident, is it correct for the construction unit to hand over the equipment to the manufacturer for installation? Why?
2. In the 1 incident, if the construction unit B agrees to the installation of equipment by the construction team of the equipment manufacturer, what should the supervision unit do?
3. In Event 2, is the chief supervision engineer correct? Why? Try to analyze the possible results of peeling inspection and the corresponding treatment methods of the chief supervision engineer.
4. Event 3, should the claim of construction unit C be submitted to the supervision unit? Why? How to handle this kind of claim?
Answer:
1. is incorrect because it violates the contract.
2. The supervision unit shall review the qualification of the manufacturer. If it meets the requirements, it can be installed by our factory. If Party B accepts the factory as its subcontractor, the supervision unit shall assist the construction unit to change the contract with the equipment factory; If Party B directly accepts the contract of the construction unit, the supervision unit shall assist the construction unit to change the contract with Party B; If it does not meet the requirements, the supervision unit shall refuse the manufacturer's construction.
3. The general supervision engineer's approach is correct. Whether the engineer has participated in the acceptance or not, when the engineer has doubts about the quality of a certain part of the project, he can ask the contractor to re-examine the concealed project.
If the re-inspection quality is qualified, the Employer shall bear all the increased contract price and compensate the losses of the construction unit, and the construction period shall be postponed accordingly; If the inspection is unqualified, the construction unit shall bear all the expenses arising therefrom, and the construction period shall not be postponed.
4.( 1) It should not be, because there is no contractual relationship between the construction unit and the construction unit C.
(2) Processing:
A.c filed a claim with B, and B filed a letter of intent for claim with the supervision company.
B. the supervision unit collects information related to the claim.
C. The supervision unit accepts the letter of intent for claim submitted by Party B. ..
D. The chief engineer shall review the claim application, preliminarily determine the cost amount and extension time, and negotiate with the construction unit of Party B..
E. The chief supervision engineer shall make a decision on the claim cost and the delay of the construction period.