by Ø the whole house side crane is added, and the increment of floor height and cost needs to be considered.
The design, production and construction difficulty of this system are lower than that of sandwich exterior wall; however, it is still necessary to focus on controlling the key construction links on site, such as grouting operation, hoisting operation, etc.
Pipeline separation: water and electricity pipelines can be used in the overhead floor of the overhead dry process floor, and the floor heating coil can be laid in the floor heating module, which can be included in the pipeline separation.
Advantages and disadvantages: the overhead dry method floor and integrated kitchen and bathroom side wall adopt dry hanging method, which has a certain empty sound, affects the later sales and may cause sales customer complaints.
Scheme 3: integrated toilet + pipeline Analysis of separation methods: 1.
3.
Over meeting risk: at present, 100% over meeting.
Pipeline integration: integration of pressurized wallboard (ALC plate) and pipeline (see the next page).
The cost analysis of each assembly rate scheme adopts the following algorithm to integrate the kitchen and bathroom cost increment It has a great correlation with the selected materials and is only an estimate; The cost offset by the incentive area and relevant financial subsidies is not considered..
It is necessary to introduce and guide the new process in advance.
According to the national evaluation standard of precast incentive policy: the precast building can be recognized if the assembly rate is not less than 50%.
Integrated kitchen and bathroom: the side wall of the integrated kitchen and bathroom adopts the keel dry hanging decorative panel, the ceiling adopts the integrated ceiling, the toilet floor adopts the overall waterproof chassis, and the kitchen floor adopts the dry process floor.
Advantages and disadvantages: the precast construction scheme most implemented in Henan Province in the early stage has high cost increment, long construction period, complex design, production and construction, and is prone to problems such as external wall water seepage, thermal bridge, unclear durability of sealant, loose grouting, etc.
Scheme 5: practice analysis of precast sandwich external wall shear wall + horizontal components: 1.
Scheme 4: integration of internal partition wall and pipeline + analysis of integrated toilet (wet ground): 1.
Generally, the review data of precast buildings need to be submitted to the assembly office of the construction commission more than 20 days in advance, because the general review meeting needs more than 2 projects to start, which can not be held at any time, and the waiting time is at least one week.
Note: Ø if the experts do not approve it as the direct laying dry method floor, the direct laying dry method floor can also get the score of pipeline separation.
The integrated kitchen and bathroom side wall adopts the dry hanging method, which has a certain empty sound, affects the later sales and may cause sales customer complaints.
For precast projects without plot ratio incentives, they face a net increase in construction and installation costs; How to select the optimal assembly design scheme under the condition of meeting the assembly rate? Comparison and selection of assembly rate schemes comparison of various schemes meeting the assembly rate: scheme 1: analysis of overhead dry method ground integration method: 1 Dry method floor: overhead dry method floor (see the figure below) 2.
Precast sandwich external wall shear wall + precast horizontal components Zhengzhou conference project: high-end talent building project of Henan pharmaceutical innovation and transformation base, youth talent apartment project directly under Henan Province, Jinhui youbu garden, Zhengshang Huxi University, and changshengshi City state, CLP longyuehuazhu (phase II is changed to precast exterior wall and then pasted with thermal insulation) over meeting risk: none, 100% over meeting.
This scheme can further reduce the air noise caused by the overhead dry method floor.
the advantage is that the thermal insulation does not catch fire and fall off, and the thermal insulation is the same as the building life.
Note: 100% is too high Yes, but in Zhengzhou, the guest sleeping restaurants need to use wooden floors, and the guest restaurants can’t use floor tiles.
Ø the direct laying dry method floor + side ceiling can meet the pipeline separation.
Advantages and disadvantages: it avoids the problem of empty sound caused by overhead ground, but the side ceiling increases the cost, and the guest restaurant cannot use floor tiles.
Pipeline separation.
Advantages and disadvantages: wet floor can be adopted.
If the application proportion of precast components in the vertical components of the main structure is not less than 35%, It can carry out the rating of precast buildings (Grade A, AA and AAA); the basic work flow of precast projects (it is necessary to focus on the completion before the planning certificate to obtain the floor area ratio Award); compared with the traditional project design, the assembly project design process is more complex, more accurate and more comprehensive, adding links such as technical planning and component disassembly and processing drawing design, which requires higher management ability, stronger overall planning ability and process communication with external experts for Party A’s designers More frequent; Important attention should be paid to the acquisition of plot ratio reward: the review of precast buildings needs to be carried out before the application for repair.
The planning bureau can only hold the planning meeting and publicize the planning after receiving the reply from the assembly office on the area without capacity reward.
Pipeline separation: straight paved ground The whole house side crane realizes pipeline separation (see the next page).
It is necessary to introduce and guide the new process in advance; Scheme II: practice analysis of precast external wall shear wall + horizontal components: 1 Precast external wall shear wall (post pasted insulation) + advantages and disadvantages of precast horizontal components: the cost is lower than that of sandwich exterior wall, and the reward area can be obtained by 3%.
It is necessary to introduce and introduce the new process in advance Guide.
the tower crane model generally needs more than 7025 tower cranes.
With the popularization of precast requirements, the plot ratio incentives for precast projects are gradually reduced and the acquisition conditions are becoming more and more strict.
Scheme 6: integration of internal partition wall and pipeline + analysis of overhead dry construction method floor practice: 1.
Except that the internal partition wall adopts pipeline integration, the other methods are basically the same as the traditional cast-in-situ, without sales and customer complaint risk.
It is necessary to introduce and guide the new technology in advance.
The integrated kitchen and bathroom side wall adopts dry hanging method, which has a certain air feeling, affects the later sales and may cause sales customer complaint problems.
Similar projects in Zhengzhou: Greenland Park City (integration of internal partition wall and pipeline), Zhengzhou Huaxin real estate project (integration of internal partition wall and pipeline), Country Garden Phoenix Project (integration of internal partition wall and pipeline), Huaxia happy HSBC garden (overhead dry method floor and pipeline separation) meeting risk: 100% meeting at present.
Advantages and disadvantages: overhead dry process floor The dry hanging method is adopted for the side wall of the surface and integrated kitchen and bathroom, which has a certain empty sound, which affects the later sales and may cause sales customer complaints.
