Calculation of foundation excavation, calculation formula of earthwork excavation

To put it bluntly, it is the formula for calculating the volume of solid geometry. The main workload is to measure dimensions and elevations on site.

1. Foundation pit excavation: V=(A+2C+Kh)(B+2C+Kh) H+1 3K2H3.

where: a, b——— are the length and width of the substrate, respectively;

k——— slope factor.

c——— Widen the width of the working face.

h——— the depth of the foundation pit.

2. Foundation trench excavation: V=(A+2C+K H)H L.

where: v——— amount of earthwork in the foundation groove.

a——— width of the bottom of the trough.

c——— the width of the working face.

h——— depth of the base groove.

l——— length of the base groove.

k——— slope factor.

3. Foundation pit excavation: v = 1 6h [a b + a b + (a + a) (b + b) + a b].

where: v——— the volume of the foundation pit.

a—the length of the upper mouth of the foundation pit.

b——— width of the upper mouth of the foundation pit.

a——— length of the bottom surface of the foundation pit.

b——— width of the bottom surface of the foundation pit.

h——— the depth of the foundation pit.

Construction Preparations:

1) Investigate the site and remove the ground and obstacles.

2) Protect the measurement reference pile to ensure that the position and size of the earthwork excavation elevation are accurate.

3) Prepare excavation machinery, personnel, construction electricity, water, roads and other facilities.

Clearance: All surface weeds, stones, debris, humus, tree roots, etc. within the scope of the project should be cleared, leveled and compacted, and the thickness of the cleaning shall not be less, and the removed waste residue shall not be discarded anywhere, and the dump truck shall be transported to the disposal site.

Earthwork excavation: The earthwork excavation referred to here is mainly for the earthwork excavation within the scope specified by the tenderer, and the excavated earthwork is transported to the place designated by the tenderer.

Excavation earthwork calculation method.

1. List rules:

Calculate the bottom area of the excavation:

Method. 1. Use the floor area of the ground floor + the area from the outer skin of the outer wall to the outer skin of the cushion. Calculation of the area from the outer edge of the exterior wall to the outer edge of the cushion (calculated according to the outer edge of the exterior wall and the outer edge of the outer edge of the outer wall in the outer shape of the outer shape in blocks, or according to the "centerline of the outer edge of the outer shape, the length of the outer edge". ）

2. Quota rules:

The upper and lower bottom areas of the excavation are calculated using the table volume formula. v = 1 6 h (S + 4 S + S down) to calculate the earthwork volume (where S is the upper bottom area, S is the middle section area, and S is the lower bottom area).

S below the floor area of the ground floor + the area from the outer skin of the outer wall to the bottom edge of the excavation (including working face, drainage ditch, grading, etc.). Calculate the in-s and under s in the same way.

According to the construction environment is open, underground or underwater, earthwork excavation is divided into open excavation, hole excavation and underwater excavation. In water conservancy engineering, earthwork excavation is widely used in site leveling and slope cutting, foundation excavation of hydraulic buildings (sluices, dams, spillways, hydropower station plants, pumping station buildings, etc.), excavation of underground caverns (hydraulic tunnels, underground workshops, various flat holes, shafts and inclined shafts), excavation and dredging of rivers, channels and ports, mining of filling materials, building stones and concrete aggregates, demolition of temporary buildings such as cofferdams or masonry and concrete structures, etc.

Construction standards. Earthwork excavation:

1. In the construction organization design, there should be a single earthwork construction plan, and the construction preparation, excavation method, grading, drainage, and slope support should be designed according to the requirements of the relevant specifications, and the slope support should have a design calculation book.

2. When manually digging the foundation pit, the operators should keep a safe distance between them, generally greater than 2 5m; Multiple mechanical excavation, the distance between the excavators should be greater than 10m, the excavation should be carried out from top to bottom, layer by layer, and it is strictly forbidden to dig the dangerous operation of the foot of the slope first.

3. Before excavating, the surrounding environment should be carefully checked, and the operation should not be carried out under dangerous rocks or buildings.

4. The excavation of the foundation pit should be sloped in strict accordance with the requirements, and the operation should be accompanied by the stability of the slope, and the problems should be reinforced in time.

5. When mechanical excavation and multi-step excavation of earthwork at the same time, the stability of the slope should be checked. According to the regulations and the check, determine the safety distance of the high slope of the excavator.

6. Protective railings are set around the deep foundation pit, and special ladders should be used for personnel up and down.

7. The slope and turning radius of the earth-moving road should meet the relevant safety regulations.

8. The blasting earthwork shall comply with the relevant regulations on the safety of blasting operations.

Dig foundation trenches (trenches).

When not grading: v digging = l (b 2c) h

When there is grading: V digging = L (B 2C Kh) h digging the foundation (ground) pit.

The amount of pit earthwork in the rectangular shape without grading is:

v dig = (a 2c) (b 2c) h

The amount of pit earthwork for rectangular grading is:

v dig = (a 2c) (b 2c) h kh2 (a 2c) kh2 (b 2c) 4 1 3k2h3 = (a 2c kh) (b 2c kh) h 1 3k2h3

k is the grading factor. There is a tangent function relationship between the slope width b and the depth h and the slope angle a, that is, tana=b h, and different soil categories take different a values, so it is not difficult to see that the grading coefficient is determined according to tana.

Excavation earthwork calculation method.

1. List rules:

Calculate the bottom area of the excavation:

Method. 1. Use the construction area of the ground floor + the outer skin of the outer wall to the cushion.

The area of the integument. Calculation of the area from the outer edge line of the exterior wall to the outer edge line of the cushion (calculated according to the outer edge line of the exterior wall and the hidden old figure in blocks or calculated according to the "center line of the outer edge of the outer shape, the length of the outer shape"). ）

Method. 2. Calculate the area of the outer edge of the cushion in blocks (calculate the construction area in the same block).

Calculate the volume of the excavation: The volume of the earthwork The bottom area of the excavation * the depth of the excavation.

2. Quota rules:

Utilize the bevel volume formula.

Calculate the area of the bottom of the bottom of the top and bottom of the excavation. v = 1 6 h (S + 4 S + S down) to calculate the earthwork volume (where S is the upper bottom area, S is the middle section area, and S is the lower bottom area).

S below the floor area of the ground floor + the area from the outer skin of the outer wall to the bottom edge of the excavation (including working face, drainage ditch, grading, etc.). Calculate the in-s and under s in the same way.

Excavation earthwork calculation method.

1. List rules:

Calculate the bottom area of the excavation:

Method. 1. Use the floor area of the ground floor + the area from the outer skin of the outer wall to the outer skin of the cushion. Calculation of the area from the outer edge of the exterior wall to the outer edge of the cushion (calculated according to the outer edge of the exterior wall and the outer edge of the outer edge of the outer wall in the outer shape of the outer shape in blocks, or according to the "centerline of the outer edge of the outer shape, the length of the outer edge". ）

Method. 2. Calculate the area of the outer edge of the cushion in blocks (calculate the construction area in the same block).

Calculate the volume of the excavation: The volume of the earthwork The bottom area of the excavation * the depth of the excavation.

2. Quota rules:

The upper and lower bottom areas of the excavation are calculated using the table volume formula. v = 1 6 h (S + 4 S + S down) to calculate the earthwork volume (where S is the upper bottom area, S is the middle section area, and S is the lower bottom area).

S below the floor area of the ground floor + the area from the outer skin of the outer wall to the bottom edge of the excavation (including working face, drainage ditch, grading, etc.). Calculate the in-s and under s in the same way.

(1) Dig a foundation trench (trench).

The foundation groove refers to the groove under the strip foundation, and the trench refers to the pipeline trench.

The engineering quantity is multiplied by the length of the trench by the cross-sectional area of the trench. The volume of its protrusion should be incorporated into the engineering quantity of the foundation groove to calculate; When the trench depths are different, they should be calculated separately. When grading earthworks, the amount of duplicate work generated at the junction is not deducted.

The length of the foundation groove: the external wall is calculated according to the length of the centerline shown in the figure; Interior walls are calculated on a net length.

The form of the cross section of the foundation groove: the calculation is carried out by dividing the slope and not grading.

Excavation depth h: generally subject to the design of the outdoor floor elevation.

According to the nature of the soil, the depth of excavation and the construction method to determine whether the soil wall is sloped. The width of the grading is calculated based on the grading factor, i.e. KH.

In order to ensure the normal operation of workers, the base width should be increased by 2c on the basis of the foundation width.

When there is grading: V digging = l (b 2c kh) h

2) Dig foundation (ground) pits.

The amount of excavation pit is calculated in cubic meters according to the size shown in the figure, and the corresponding quota is applied according to the soil type and excavation depth.

The amount of pit earthwork in the rectangular shape without grading is:

v dig = (a 2c) (b 2c) h

The amount of pit earthwork for rectangular grading is:

a＋2c＋kh）×（b＋2c＋kh）×h＋1/3k2h3

3) k is the grading factor. There is a tangent function relationship between the slope width b and the depth h and the slope angle a, that is, tana=b h, and different soil categories take different a values, so it is not difficult to see that the grading coefficient is determined according to tana. For example, tana=b h=.

We denote the grading factor by tana=k, so the grading width b= is determined according to the soil type. The grading coefficient of the first and second types of soil is, the third type of soil is, and the fourth type of soil is.

1. Foundation pit excavation: V = (A + 2C + Kh) (B + 2C + Kh) H + 1 3K2H3, where a and b ——— are respectively the length and width of the base, K ——— slope coefficient, C ——— widen the width of the working face, and H ——— the depth of the foundation pit. 2. Foundation trench excavation:

v=(a+2c+k h)h l, where: v——— the amount of earthwork in the foundation groove, the width of the bottom of the groove in a———, the width of the working face in the ———, the depth of the foundation groove in h———, the length of the foundation groove in l———, the slope coefficient of k———. 3. Foundation pit excavation

v=1/6h[a×b+a×b+(a+a)×(b+b)+a×b]。Where: V——— the volume of the foundation pit, a - the length of the upper mouth of the foundation pit, the width of the upper mouth of the foundation pit ———, the length of the bottom surface of the foundation pit ——— a, the width of the bottom surface of the foundation pit of the ———, and the depth of the foundation pit ——— h.

Extended information: Precautions: Before earthwork excavation, the underground and above-ground obstacles in the construction area should be removed and treated according to the requirements of the construction plan.

The location of the building or structure or the positioning control line (pile), the standard horizontal pile and the size of the slotted gray line must be inspected and qualified, and the pre-inspection procedures must be completed. During night construction, there should be sufficient lighting facilities, obvious signs should be set up in dangerous areas, and the excavation sequence should be reasonably arranged to prevent wrong excavation or over-excavation.

is querying for you, please wait for a while, and immediately sort out the data for you to excavate the earthwork calculation formula: 1. List to calculate the volume of the excavation: earthwork volume = the bottom area of the excavation depth of the earthwork.

2. Quota rule: foundation trench excavation: V=(A+2C+K H)H L

where: v——— amount of earthwork in the foundation groove. a——— width of the bottom of the trough. c——— the width of the working face. h——— depth of the base groove. l——— length of the base groove. Calculation rules for the quantity of foundation earthwork excavation:

1. List rules: the excavation of the foundation earthwork is calculated by multiplying the bottom area of the foundation cushion by the depth of the excavation according to the size shown in the design drawing. 2. Quota rules:

The volume of manual or mechanical excavation shall be calculated by multiplying the area at the bottom of the groove by the depth of the excavation. The area of the bottom of the groove should be multiplied by the length of the bottom of the groove by the width of the bottom of the groove, the length and width of the bottom of the groove refers to the width of the foundation plus the working face, when the slope is required, the earthwork quantity of the slope should be merged in the total earthwork.

Hope it helps.

Checklist Rules:

Calculate the bottom area of the excavation: method.

1. Use the construction area of the ground floor + the outer skin of the outer wall to the cushion.

The area of the integument. Calculation of the area from the outer edge of the exterior wall to the outer edge of the cushion (calculated according to the outer edge of the exterior wall and the outer edge of the outer edge of the outer wall in the outer shape of the outer shape in blocks, or according to the "centerline of the outer edge of the outer shape, the length of the outer edge". Method.

Second, the outer edge of the cushion is calculated in blocks.

Calculate the volume of the excavation: The volume of the earthwork The bottom area of the excavation * the depth of the excavation. 2. Quota rules: use the prism.

Quota Rule: Utilizes the table volume formula.

Calculate the bottom and bottom areas of the excavation.