Chainage Concept in Surveying

In surveying, chainage is the distance along a survey line or route measured from a fixed starting point. It is commonly used in linear projects like roads, railways, pipelines, etc. The chainage of a point indicates its position along the survey line relative to the beginning of the line.

When moving from one point to another along the survey line, the change in chainage is equal to the distance between the two points. If moving forward along the line, the chainage increases. If moving backward, it decreases.

Determine Chainage of Point B

To determine the chainage of point B, we are given the chainage of point A and the horizontal distance between point A and point B. Assuming point B is further along the survey line from the starting point than point A, the chainage of B will be the chainage of A plus the horizontal distance AB.

The relationship can be expressed with the following formula:

Chainage of B = Chainage of A + Horizontal distance between A and B

Chainage Calculation Steps

Let's plug in the given values into the formula:

• Chainage of point A = $2093.335 \text{ m}$
• Horizontal distance between A and B = $237 \text{ m}$

Using the formula:

$\text{Chainage of B} = \text{Chainage of A} + \text{Horizontal distance AB}$

$\text{Chainage of B} = 2093.335 \text{ m} + 237 \text{ m}$

Now, let's perform the addition:

$\text{Chainage of B} = 2330.335 \text{ m}$

The calculated chainage of point B is $2330.335 \text{ m}$.

Based on the calculation, the chainage of point B is $2330.335 \text{ m}$.