Civil Engineering Survey Calculation Questions, please write the full process 100

This question is about the adjustment calculation of the level network, and in this case, the elevation of the p-point can be calculated in the following way:

The first step is to calculate the elevation of the p-point:

The elevation of point P = the elevation of point A + the height difference measured from A to P; Write h1

The elevation of point P = the elevation of point B + the difference between the height measured by B and P; Write h2

The elevation of point P = the elevation of point C + the difference of elevation from P to C; Denote as h3

Here we should see the measurement direction of the height difference, for example, in the figure, the height difference of b --p is used directly, the measurement direction between c and p is p-->c, this height difference should be used as a reverse sign, and the measurement direction between a and p seems to be a-->c, if so, it is used directly, and the direction of the arrow is not very clear.

Step 2: The first step calculates that there are 3 elevation values of point p, and these 3 elevation values are not equal, and then the weighted average of these 3 elevation values is taken to obtain the adjustment value of point p

h = ( h1*(1/a) +h2*(1/b) +h3*(1/c) ）/ (1/a+1/b+1/c)

a, b, and c are the number of stations measured from a, b, and c to p, and 1 a, 1 b, and 1 c are the rights of these three sections.

I couldn't see the numbers in the picture clearly, so I had to use letters instead.

The normal calculation method is the column error equation, according to the principle of least squares, three height difference corrections are solved, the closure difference is eliminated, and the elevation of point p is calculated by using the height difference adjustment value. (The above is a direct solution, no need to calculate the correction number, the result is the same).

Hope it helps.

Summary. 1. Calculation rules for leveling the site.

1) List rules: calculated according to the size of the design drawing, based on the area of the first floor of the building.

2) Quota rule: according to the size shown in the design drawing, add 2 meters on each side of the outer edge line of the external wall of the building to calculate the square meter area. 2. Calculation formula for leveling the site.

S=(A+4) (B+4)=S bottom +2L outside +16 formula: S——— the amount of leveling site; a——— length of the outer edge of the outer wall in the direction of the length of the building; b——— length of the outer edge line of the outer wall in the width direction of the building; S bottom ——— floor area of the ground floor of the building; l Perimeter of the outer edge line of the exterior wall of the ——— building.

This formula is applicable to the calculation of site grading quantities for any building or structure consisting of rectangular shapes.

Hope mine can help you!

How to do this civil quantity calculation problem? The more detailed the process, the better!

Hello, I have seen your question, and I am sorting out the answer, please wait for a while Hello, I am happy to answer for you, according to the relevant information query, how to do this civil engineering volume calculation question is: 1. Calculation rules for leveling and rolling excavation sites (1) List rules: Calculate the area of the first floor of the building according to the size shown in the design drawing.

2) Quota rule: according to the size shown in the design drawing, add 2 meters on each side of the outer edge line of the external wall of the building to calculate the square meter area. 2. The formula for calculating the flat site is s=(a+4) (b+4)=s bottom + 2l outside + 16 formula:

s——— the amount of work to level the site; a——— length of the outer edge of the exterior wall in the direction of the length of the large orange core of the building; b——— length of the outer edge line of the outer wall in the width direction of the building; S bottom ——— floor area of the ground floor of the building; l Perimeter of the outer edge line of the exterior wall of the ——— building. This formula is applicable to the calculation of site grading quantities for any building or structure consisting of rectangular shapes. Hope mine can help you!

Design Mix Ratio:

Cement: 290kg m;

Sand: 290;

Stones: 290 ;

Water: 290 mill m.

Actual unilateral material usage:

Cement: 290kg m;

Sand:; Stones:;

Water:. Construction mix ratio:

Ratio of the actual amount of unilateral material for cement:sand:gravel:water:

PS: In this question, it should be noted that the actual weight of water in the material barrage should also be included in the unilateral water consumption of the construction;

(1) Point C coordinates: , 2) Azimuth angle from point A to point D: 316°4

Horizontal Distance: The following is the stakeout procedure using a total station: first set the station, then look back, and then adjust the azimuth reading to: 316°4.

The instrument is not so accurate, and the error of one or two seconds is no problem. Then he directs the mirror holder to move left and right in the direction of the direction. Remeasure the horizontal distance and direct the viewer to move back and forth to the exact horizontal distance.

If the direction of the person holding the mirror is deviated, then command him to move left and right to the exact direction, measure the distance again, and then command to the exact horizontal distance. Repeat until the stakeout point is ready to be released.

You can't afford to hurt the civil construction!!

Content from user: Xie Yan.

Knowing ha=, hb=, find hab and hba

Analysis: HAB refers to the difference between point B and point A, that is, how much point B is higher than point A (by subtraction), and the same is true for HBA.

Solution: hab=hb-ha=

hba=ha-hb=

Let the elevation of point A be, when the rear view reading is and the front view reading is, ask what is the height difference and what is the elevation of point B to be measured? Schematic diagram of the trial drawing.

Analysis: The height difference is the rear view reading minus the front view reading, and the elevation of point B can be used by the meter height method or the height difference method, and the height difference has been found, so the latter is used.

Solution: hab=

hb=ha+hab=

It is known that the readings of Ha=, A=, B1, B2 and B3 are as follows: B1=, B2=, B3=, and the elevation of B1, B2 and B3 points is calculated by the meter height method.

Analysis: The height method first finds the elevation of the line of sight, and then subtracts the readings of each forward view respectively to obtain the elevation.

Solution: i=ha+a=

hb1=i-b1=

hb2=i-b2=

hb3=i-b3=

Try to calculate the results of the level measurement record, and use the height difference method to complete the following**:

Measuring point Rear view reading (m) Forward view reading (m) Elevation difference (m) Elevation (m) Remarks BMA known leveling point tp1 tp2 tp3 b sum a=6

1。Angle measurement, alignment part, pedestal, leveling dial, leveling, telescope, pedestal, leveler.

2。Foot spiral, front sight, notch, objective, transverse wire.

6】……I won't.

7。Point selection and marking, edge measurement, horizontal angle measurement, azimuth measurement of the start edge.

8。Points on the same contour line have equal elevations; The contour line must close by itself, and if it does not close within the frame, it will close outside the frame; Contours of different elevations cannot intersect (except at cliffs), and the same contour lines cannot branch; The direction of the most ** segment between contour lines, that is, between the line segments perpendicular to the two contour lines, is equivalent to the direction line with the greatest inclination on the ground; Contour distances are the same on the same topographic map; The contour line is orthogonal to the ridge line and the valley line.

High. 13.。Cartesian coordinate method, polar coordinate method, angular coordinate method, distance intersection method.

14.。"One" shape, "L" shape, "ten" shape, "T" shape.

15.。…Wood has learned!

16.。Boundaries of various land uses.

Calculate the average = (

The calculation corrections are as follows: unit mm, according to the error formula in the arithmetic mean, m= under the root number, [vv], n(n-1)= under the root number, [(-14) +3) +8 +(6) +15] (6*5)=

Relative Error =

It is divided into written test and practical operation, and the practical operation is the elevation closure, the measurement and setting of the angle.

Calculated mean = ( The calculated corrections are in mm according to the error formula in the arithmetic mean m= under the root number [vv] n(n-1) = under the root number [(-14)2+(-3)2+82+(-6)2+152] (6*5)= relative error =