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3.1 Construction measurement plan

1. Control of the engineering axis. The control of the engineering axis should explain the preparation work before actual measurement, the measurement method of the building plane position, the positioning of the axes of the first floor and each floor, the line layout method and axis control requirements.

2. Elevation control. The accuracy requirements for level measurement should be determined, elevation control level points should be arranged, and an elevation control network should be established. The number of basis points for establishing a level basis point group on the site should not be less than 3; the standard piles should be solid and stable to prevent external influences. The level network and the level basis point group should be tested at a certain time. The level network is generally circular, and there is only a unique starting point for elevation in the network. The elevation control point should be measured at the national level mark or urban level point. Explain the elevation control method of the building and the vertical transmission method of the building's elevation.

3. Verticality control. Controlling verticality is the basis for ensuring the quality of high-rise buildings and is also one of the key links.

Explain the method of controlling the verticality of the building, including the control method of the perpendicularity of the perpendicularity of the perpendicularity of each floor within, and explain the measures to ensure the control quality. For example, a frame shear wall structure, the control method of the perpendicularity of the building is: the control of the perpendicularity of the building is controlled by the theodolite, and the measurement is performed separately before and after the concrete is poured to ensure that the deviation of the verticality is controlled within the allowed range of the specification; the verticality of each floor within is controlled by a wire hammer, and the laser vertical instrument is reviewed to strengthen the control strength.

3.2 Earthwork construction plan

(1) Calculation of the amount of ground leveling soil;

(2) Site leveling construction methods and selection of construction machinery;

(3) Verify the stability of the slope excavation slope;

(4) Choice of foundation pit excavation methods (manual excavation, mechanical excavation);

(5) Selection of foundation pit excavation machinery;

(6) The selection of earthwork transportation machinery;

(7) Cooperation calculation between excavator and soil transport vehicle;

(8) Earth excavation method: Choose manual excavation or mechanical excavation method. If you choose mechanical excavation, you should choose the type and model of the earth excavation machinery according to the foundation pit situation; choose excavation methods, such as layered excavation or excavation to the bottom of the pit at one time (300mm~500mm manual excavation at the bottom of the pit); determine the excavation flow direction and the walking route of the excavation machinery (drawing description); determine the place of earth piled up, whether precipitation is needed, what precipitation equipment is used, etc.; select earth transportation machinery and perform coordination calculations between the excavator and the soil transport vehicle.

(9) Earthwork backfill method: requirements for backfill soil; methods for filling; mechanical selection; compaction method; quality requirements.

3.3 Foundation project construction plan

3.3.1 shallow foundation

Construction methods and technical points of cushion layer of strip or independent foundation, reinforced concrete foundation and matte stone foundation.

3.3.2 Pile foundation

Prefabricated reinforced concrete piles: determine the pile sinking method; select pile sinking equipment; determine the construction procedures of static pressure pipe piles; determine the pile pressing sequence and pile pressing route; the construction points of static pressure pipe piles; the final pressure conditions of static pressure piles; the quality control method of pile bearing pads, and the construction methods and technical points of reinforced concrete pile bearings.

1. Prefabricated reinforced concrete square piles

(1) Selection of pile sinking equipment;

(2) Determine the order of pile sinking and pile sinking method;

(3) Quality control method for pile sinking;

(4) Construction methods and technical points of pile bearing cushion layer and reinforced concrete pile bearing.

2.

Drilling (sinking tube) cast pile

(1) Selection of pile forming machinery

(2) Construction process of immersed pipe cast-injected pile

(3) Determine the order of pile formation

(4) Technical points and quality requirements for cast-injected pile construction

3.

Prestressed concrete static pressure pipe piles

(1) Determine the construction procedures of static pressure pipe piles

(2) Selection of pile pressing machinery

(3) Selection of pile sinking line

(4) Key points of construction of static pressure pipe piles

(5) Connection method between pipe piles and bearings

3.3.3 Basement construction

1.

Construction of basement floor

(1) Construction sequence of basement floor

(2) Method of pouring concrete cushion layer

(3) Requirements for pile chiseling heads and welding anchoring steel bars

(4) Formwork project: side mold selection and support method; foundation reverse beam support method; post-pouring tape support method.

(5) Reinforcement project: reinforcement connection method; protective layer pad setting; reinforcement bracket setting; reinforcement binding sequence.

(6) Concrete engineering: selection of pumped concrete equipment; concrete pouring method; construction requirements of anti-seepage concrete; post-pouring tape construction method; concrete curing method; measures to prevent temperature cracks from the bottom plate.

2.

Construction of basement walls and roof panels

(1) Rebar binding and connection methods

(2) Treatment of horizontal construction joints between the basement exterior wall and the foundation.

(3) Method for supporting the basement body; structure of the outer wall bolts.

(4) Anti-seepage measures for basement exterior walls: concrete mix ratio, concrete pouring and curing requirements.

(5) Maintenance method of basement wall

3.3.4 Foundation pit support and precipitation project construction

1.

Project precipitation plan

(1) Selection of precipitation method:

① Precipitation of water collection well

② Well point precipitation (light well points, pipe well points, deep well points, etc.)

(2) Plane and elevation layout of precipitation system

(3) Precipitation system design and calculation: calculation of water inrush volume; calculation of well point pipe number; determination of well point pipe spacing; selection of pumping equipment; design of well point system structure; drawing well point system construction drawing (plan layout drawing, elevation layout drawing, single well structure drawing).

(4) Construction methods of well point precipitation system: preparation work; construction methods; monitoring and environmental protection measures.

2. Foundation pit support plan

(a) Selection of support structures (pile-row support, soil nail support, etc.)

(b) Layout of support structure

(c) Support structure construction: construction preparation; equipment selection; construction methods and technical points; quality requirements

3.4 Main project construction plan

1. Lifting and transportation plan

(1) Selection of lifting and transportation system

1) Tower crane + concrete pump

2) Tower crane + concrete pump + construction elevator

3) Tower crane + fast elevator (or derrick crane) + construction elevator

(2) Tower crane

1) Selection of tower cranes: verification of lifting parameters.

Installation and disassembly of tower cranes: selection of installation location; anchoring of attached tower cranes; installation and disassembly of tower cranes.

2) Construction elevator: selection of construction elevators; design and construction of construction elevator base; installation procedures of construction elevators.

3) Concrete pump: selection and piping design of concrete pumps; selection of concrete fabric machines.

2. Template Engineering

(1) Template selection: The template of the various components should be determined which material is used, such as combined steel formwork, wood plywood formwork, bamboo plywood formwork, etc.

(2) Special template structural design.

(3) Supporting and mold removal methods: the number of template equipment, turnover times; horizontal and vertical transportation plans of the template; template installation sequence, key points of the formwork support of walls, columns, beams, etc.; the order and requirements of template removal.

3. Rebar Engineering
To be continued...