What should be done by the side station supervision of the earthwork backfill project

Look at the backfill thickness. The compaction check meets the design requirements.

Backfill side station supervision record template:

1. The mortar marking (mix ratio) of the load-bearing wall of the bricklaying project is full, the ash joints are full, the staggered joints are correct, the door and window holes are correct, the embedded parts and the buried pipeline mortar mix ratio test is measured at the side station, and the on-site inspection and measurement are measured.

2. The position and size of the indoor wooden doors and windows are correct, flat and square, not warped, close-seam aluminum alloy doors and windows, measurement inspection, and measurement.

3. The leveling layer, thickness, flatness, anti-crack insulation layer thickness, flatness of the roof waterproofing engineering are filled and embedded tightly, firmly bonded, wrinkle-free, non-empty, and the water drop pipe is installed firmly, the joints are tight, the drainage is smooth, there is no leakage observation, measurement observation, measurement observation and observation.

4. The surface of the high-grade decorative veneer is smooth, the joints are tight, the geometric size of the skeleton is accurate, the installation is firm, the wallpaper wallcovering is firmly pasted, there is no hollow drum, the edge wrinkles are evenly distributed, the texture is clear, the uniform is straight, the color is coordinated, there are no joint traces of observation, measurement observation, measurement observation and observation.

5. The wood grain of the varnish project is clear, bright and smooth, no flow wrinkle skin sandblasting, spraying and pasting firm, smooth and without delamination and cracks.

The sample record of the supervision of the backfill side station is as follows:

Entrusted by the company, the company undertook the supervision project of the project, and supervised the whole process of all the construction contents of the project.

After the signing of the project supervision contract, our company immediately set up a supervision team to station at the user site, and carried out supervision work in accordance with the supervision procedures under the unified organization and arrangement of the chief engineer.

At all stages of project construction, according to the national policies, laws, regulations, standards, norms, national standards for information technology process supervision, the project construction contract signed by the construction unit and the contractor, and the supervision contract signed by the construction unit and the supervision unit control the quality, progress, investment and change of the project, and manage the contract and information documents of the project. Hold regular supervision meetings to check the completion of various tasks and coordinate and solve existing problems;

Submit stage summaries to users from time to time; Grasp the problems existing in the project in a timely manner and put forward supervision suggestions; Fair and impartial coordination and handling of problems encountered in the implementation of the project to ensure the quality and smooth progress of the project construction. The project supervision department fully fulfilled the obligations and responsibilities given by the supervision entrustment contract, successfully completed the supervision task of the project, and the supervision control objectives met the contract requirements.

1. Material requirements.

1) Crushed stone soil, sand (the consent of the design unit should be obtained when using fine and silty sand) and blasted stone slag can be used as fillers below the surface. Its maximum particle size shall not exceed 2 3 or 3 4 of the thickness of each layer (when vibrating rolling is used), and the moisture content shall comply with the regulations.

2) The moisture content of cohesive soil should be tested, and it must meet the requirements of the design and construction specifications before it can be used.

3) Saline soil is generally not usable. However, the filler shall not contain salt crystals, salt blocks or rhizomes of salt-containing plants, and can be used in accordance with the provisions of Table 1 8 of Appendix I of the Code for Construction and Acceptance of Earthwork and Blasting Engineering.

2. Main machinery and tools.

1) Shipping earthmoving machinery includes: bulldozers, dump trucks, bulldozers, scrapers, half-bucket trucks, etc.

2) Rolling machinery includes: hand rolling, sheep foot rolling and vibrating rolling, etc.

3) General tools are: frog or diesel tamping machine, trolley, shovel (flat head and pointed m, steel tape measure, 20 lead wire, rubber tube, etc.).

Answer]: C2021 2020 Edition Textbook P45

Option A is wrong, and the supervisor implements the side station supervision according to the plan of Wang Chun, the station supervisor. Option B is wrong, and the side station supervisor implements side station supervision for important construction processes and key parts. Option D is wrong, the supervision record must have the signature of the side station supervisor and the current forest field quality inspection personnel, otherwise the next process construction cannot be carried out.

Construction enterprises in the application for foundation acceptance or foundation part of the letter backfill, must prepare a feasible "foundation backfill construction plan", the supervision company should strengthen the review of the plan argument, arrange a special person to supervise and inspect the station, do a good job of station supervision records, and within 2 working days after the end of the foundation backfill (or partial backfill) will be reported to the quality supervision station and the construction unit for the record. For the construction enterprise does not prepare the plan or does not carry out backfill construction in accordance with the plan, the supervision unit is not inspected in accordance with the requirements, and the construction unit is not in accordance with the requirements of the backfill construction behavior is effectively stopped, or not within 2 working days of the station supervision record reported to the quality supervision station and the construction unit for the record, the quality supervision station will be recorded as a bad behavior, the circumstances are serious, the construction office will be responsible for the units and individuals to clear out of the government district construction city with the big field treatment.

1.Backfill according to the scheme.

There is a fertilizer groove backfill using 2:8 ash soil, garage roof backfill using plain soil, should be checked according to the design requirements of the type of backfill, compactness, construction method. Check the moisture content of the backfill.

The thickness of the virtual paving and the number of compaction times, the ash and soil are strictly calculated according to the volume ratio.

2.When backfilling, check whether the bottom of the foundation pit is cleaned up, and the fertilizer tank backfill must be cleaned to the base elevation line, and no debris is allowed. The foundation wall should reach a certain strength before the backfill construction can be carried out.

3.Check the quality of the backfill, and the water content of the backfill is generally selected.

In about 10% clean cohesive soil (it is advisable to hold it into a clump by hand and spread it out naturally). If the soil is too wet, it should be dried or mixed with dry soil, white ash, etc. If the water content of the soil is low, it can be properly sprinkled with water to moisten.

It is strictly forbidden to pour water to sink the soil by ramming it. During the construction of the rain slag nuclear tank, the surface water should be prevented from flowing into the pit to prevent soaking the base soil. 4.

Backfill should be backfilled in layers, the thickness of each layer of frog tamping machine is 200-250mm, and the manual tamping is not more than 200mm, and each layer is rammed at least three times, requiring a tamping and half tamping. It is strictly forbidden to spread the soil too thick and not tamp enough.

5.Foundation pit backfill should be carried out on both sides or around the opposite side at the same time, the elevation on both sides of the foundation wall can not differ too much, fill a longer pipe ditch wall, and the inside should be supported. After each layer of backfill is tamped, ring knife sampling should be carried out in accordance with the provisions of the specification.

Detect its dry density.

and compaction coefficient, after reaching the requirements, the upper layer of soil is laid.

6.When the deep and shallow foundation pits are connected, the deep foundation pit should be filled first.

When filling to be consistent with the elevation of the shallow foundation pit, it is then filled with the shallow foundation pit. When the section is filled, the staggered place is made into a stepped shape, and the distance between the upper and lower joints is not less. When backfilling the core and pipe trench, manually fill the soil around the pipe until it is above the top of the pipe, and can be mechanically compacted without damaging the pipe.

After the backfill is completed, it should be trimmed and leveled.

The main points of foundation earthwork backfill supervision are as follows: first, foundation cleaning; Second, the soil quality should meet the requirements of Zheng Xian; the third is the thickness of the layer; fourth, the degree of tamping; The fifth is that the dry density sampling should be qualified.

Fill in the record of the supervision side station (concrete pouring as an example).

1. Climate: sunny, rainy, air temperature (average temperature).

2. Part or process: plane position (axis interval), floor (or elevation) component name: column, shear wall, beam, plate and other concrete pouring and smashing.

3. Construction situation.

1) Concrete strength grade: cubic meters of pouring concrete.

2) Concrete ** method: commercial concrete (or on-site stirred concrete).

3) Mechanical equipment used: pumping concrete (or tower crane hopper), number of vibrating rods: sets.

4) the number of construction people: pouring people, looking at the steel bar, formwork people.

4. Supervision: the whole process of side station supervision:

1) Check the concrete mix ratio notice and feeding list;

2) Check the record of the on-site quality inspector or the post foreman on duty, name:

3) Check the pouring method: meet the requirements of the construction plan, and the pouring is good (or problematic);

4) Observe the position of the steel bar and the deformation of the formwork during the pouring process;

5) Random witness sampling to do concrete test block group;

6) Observe the workability of concrete, and the collapse degree of the concrete is mm, and it is strictly forbidden to add water on site

7) to the commercial air wheel concrete mixing plant spot check computer proportioning unit;

8) When mixing on site, spot check the measurement of concrete ingredients, and record the measured weight of cement, sand, stone, water and admixtures.

5. Find problems:

1) The concrete mix ratio does not match the design mix ratio;

2) It is found that the position of the reinforcement is too large or the floor reinforcement collapses seriously or the thickness of the concrete protective layer is not well controlled

3) It is found that there is mold expansion and slurry leakage;

4) The concrete pouring and pounding sequence is not continuous, and the connection between the old and new concrete is not goodThe debris at the joint is not cleaned;The concrete vibration sequence is not good, and the vibration strength is not enough somewhere in the front, and there may be vibration leakage;

5) The concrete is too thin or too dry, which affects the pouring or blocking of the pipe;

This project is commercial concrete, check the concrete mix ratio notice provided by the concrete ready mix manufacturer, and extract the concrete compressive test block and the concrete impermeability test block

When pouring a vertical structure, control the free height of the concrete to fall;

Check and control the vibration, continuation time, and insertion distance of each vibration pointControls the duration of concrete joints that are poured first and later;When there is an abnormal situation or does not meet the requirements, the contractor shall be notified orally or in writing in a timely manner and urged to rectify;

Frequently inspect and observe the operation of construction machinery;

Check and measure the slump and workability of concrete, and witness sampling according to the requirements of the "Witness Sampling and Inspection Plan".In the process of concrete pouring, often observe the formwork, supports, steel bars, embedded parts and reserved holes, and when deformation and displacement are found, the contractor shall be urged to deal with them in timeSupervise and urge the contractor to do a good job of maintenance work in a timely manner;

Check the operation of the contractor's quality assurance system;

Record the changes in the construction process, and make detailed records of the side station and the supervision diary.

(1) Check the construction readiness (beforehand).

1) Check the name of the ready-mixed concrete ** unit;

2) Clarify the technical requirements for the poured concrete, mainly including: strength grade, impermeability grade, slump, initial setting time, final setting time, concrete pouring amount, etc.;

3) Check whether the construction channel is unblocked, whether the foundation of the channel and pump truck and other conveying equipment is solid and flat, and whether the lighting is sufficient;

4) Check the model, quantity and integrity of the vibrating equipment;

5) Check whether the on-site management personnel such as quality inspectors, constructors (foremen) and testers are on duty, and check the names of personnel;

6) Check whether the concealed projects such as steel bars and embedded pipelines have been accepted according to the regulations;

7) Check whether the "Concrete Pouring Application" is submitted to the project supervision department;

8) Check whether the construction plan has been disclosed.

2) Supervise the construction process (during and after the event).

1) Check the "Ready-mixed Concrete Transport Bill", "Ready-mixed Concrete Factory Certificate" (submitted within 32 days), "Concrete Chloride and Alkali Total Calculation" (when the engineering structure is required), "Sand and Gravel Alkali Activity Test Report" (when the engineering structure is required).

2) Check the departure time and arrival time of the concrete transport truck;

3) Supervise the construction unit to measure the concrete slump (expansion);

4) Check whether the construction method is consistent with the approved construction plan. Mainly inspect the on-site transportation, conveying mode, pouring sequence, whether continuous pouring, layered thickness, vibration mode, surface wiping and maintenance measures, etc.;

5) Check whether the type, number of groups and maintenance conditions of the concrete test block retention of the construction unit meet the relevant requirements;

6) Check whether the number and location of large-volume concrete temperature measuring holes are consistent with the construction plan;

7) Check whether the steel bars and reserved holes and embedded parts are displaced during the concrete pouring process, and special attention should be paid to whether the negative reinforcement (upper iron) is trampled and deformed;

8) Check and record the start time and end time of concrete pouring;

9) When the concrete is applied in winter, it should be checked whether the construction personnel record the temperature of the concrete into the mold and whether the temperature measuring hole is left according to the construction plan; Whether it is covered and insulated immediately after pouring.

10) Organize the side station records.