Problem 3: Tunnel Surveying Objective: To prepare survey computations from preliminary survey of a proposed tunnel. The preliminary survey consists of a detailed instrumental examination of the route to be selected as a result of the reconnaissance survey in order to estimate the cost of the proposed tunnel line. Problem: The following data are taken from the preliminary survey of a proposed tunnel. a) Determine the horizontal lengh, of tunnel. b) Determine the direction of tunnel. c) Determine the slope of tunnel

Problem 3: Tunnel Surveying Objective: To prepare survey computations from preliminary survey of a proposed tunnel. The preliminary survey consists of a detailed instrumental examination of the route to be selected as a result of the reconnaissance survey in order to estimate the cost of the proposed tunnel line. Problem: The following data are taken from the preliminary survey of a proposed tunnel. a) Determine the horizontal lengh, of tunnel. b) Determine the direction of tunnel. c) Determine the slope of tunnel

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter14: Highway Surveys And Location

Section: Chapter Questions

Problem 5P

See similar textbooks

Related questions

Q: A horizontal control station must be established surrounding the entire construction site before…

Q: iscuss briefly on how to analyze reservoir routing using Puls method.

Q: Outline benefits of a mass curve (flow duration curve ).

Q: A horizontal collimation test is performed on an automatic level. With the instrument setup at…

Q: To control the elevation of a building, contractors must use or establish one or more benchmarks…

A: A differential leveling between station BMA to station BMC is given, with the RL of station BMA…

Q: Suppose you worked for a business which involved making its money from surveying and engineering…

A: Surveying and leveling are major branches of calculation of earth for future site work. This means…

Q: The sag correction in surveys is always. 1. positive 2. negative zero 4. None of these 3.

Q: 3.758 m 1.424 m 1.511 m 4.753 m 3.943 m 3.941 m 2.163 m1.571 m твм 120.73 m Figure 1 Levelling data…

Q: s staff read

A: Given RL of TBM 1=13.832

Q: A construction surveyor on his initial instrument setup takes a foresight rod reading of 3.78' to a…

Q: A levelling fieldwork was conducted to determine the level of an existing road that runs road under…

A: Elevation:-The vertical difference between the two point is called Elevation. Levelling:- The…

Q: What are several factors contribute to thevariation of the standard penetration number ?

A: To ascertain the in-situ characteristics of soil, the Standard Penetration Test (SPT) is frequently…

Q: Given the Elevations and HI readings, obtain the values for BS and FS. Show your solution. BS HI FS…

Q: theodolite and the tape to measure angles and distances respectively

A: Theodolite- Theodolite is device in surveying which is used to measure both Horizontal and Verical…

Q: A differential leveling was conducted to know the difference in elevation of Mount Alchan and Mount…

Concept explainers

Area Computations

The area is the mathematical estimation of the inner space occupied by any shape or object and area computation is the evaluation of how much inner space that particular shape or object has utilized. Simple applications include calculating the area of wall for the quantity of paint or plaster to be applied on it, area calculations for construction of a trapezoidal dam and how much material is required, calculating the area of a circle to determine the range or distance of wheels that they are capable of covering due to varied radii and so on.

Question

Problem 3: Tunnel Surveying
Objective: To prepare survey computations from preliminary survey of a proposed tunnel.
The preliminary survey consists of a detailed instrumental examination of the route to be
selected as a result of the reconnaissance survey in order to estimate the cost of the
proposed tunnel line.
Problem:
The following data are taken from the preliminary survey of a proposed tunnel.
a) Determine the horizontal lengh of tunnel.
b) Determine the direction of tunnel.
c) Determine the slope of tunnel
Horizontal traverse
Bearing
N 40-10¹ E
N 50-20' E
S 70-45' E
N 55-25' E
Lines
AB
BC
CD
DE
Distance
210.55
245.70m
355.12m
505.23m
22

Points
BM
A
TP1
TP2
TP3
E
Vertical Traverse (Differential Leveling)
НІ
Foresight, FS
2.50
2.90
3.15
2.10
3.25
Back sight, BS
1.80
2.24
1.75
2.20
1.85
Elevation
330.50m

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Step by step

Solved in 5 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

Enumerate the 3 general steps in horizontal control surveying and explain the relevance of each step,
Define the term random error and give two surveying examples of a random error.
Define the term systematic error and give two surveying examples of a systematic error.
Q1. Table Q1 shows the levelling data obtained from field observations between two temporary benchmarks namely TBM 1 and TBM 2, respectively. Where, the total levelling distance between TBM 1 and TBM 2 is 250 metres. As a junior site civil engineer at the construction site, you have been assigned by a senior site civil engineer to finalise and evaluate the levelling data to ensure the levelling work complies with the levelling standard and procedures. Table Q1 Intermediate Backsight Foresight Remarks Sight 1.592 ТВМ 1 RL3 AAА.AAA m 1.675 2.052 СР1 1.354 1.704 СР2 1.320 0.907 СР3 1.379 Point 1 1.384 Point 2 1.406 Point 3 0.940 1.315 СР4 0.832 1.507 СР5 -2.938 Soffit 1 -2.833 Soffit 2 -2.717 Soffit 3 1.546 ТВМ 2 RL-BВВ.BBB m a) Finalise the levelling calculation using rise and fall method, performed arithmetic check, accuracy check, levelling misclosure and final reduced level for all observed points. b) For verification purpose you are required to re-calculate the reduced level using…
Observations were made between points X and Y on opposite sides of a wide water-filled quarry as follows: Level at X Instrument height = 1.350 Staff reading Y = 1.725 Level at Y %3D Instrument height 1.410 Staff reading X = 1.055 Calculate the true difference in level between the stations and the reduced level of Y IIX is 352.710 AOD
3. The following questions refer to the set of differential leveling notes shown in Table 2. a. Determine the elevation of each station. b. The elevation of BM 132 is known to be 153.235 m. The length of the level run was 780 m, with each station equally spaced. Adjust the elevation of each station such that the error is evenly spaced. Show sample calculations of your work. c. Determine the accuracy ratio and state whether the survey meets the requirement of an accuracy ratio of less than 1/3,000. Station BM 130 TP 1 TP 2 TP 3 BM K110 TP 4 BM 132 Table 2 BS [m] HI [m] 0.608 1.030 0.482 1.591 2.145 1.997 FS [m] Elevation [m] 153.285 1.525 0.736 2.83 1.885 1.795 0.321
I need the answer as soon as possible
(b) Discuss the surface survey of tunnels.
Describe possible errors which are encountered during this survey and how they can be minimised.
Which type of survey can be used in muddy areas and why?
1.0 Give an example of Critical Path Analysis of zero (0) Method.
To control the elevation of a building, contractors must use or establish one or more benchmarks near the building site. In this example, benchmark A (BMA) is located some distance away from the site and the contractor wants to establish benchmark B (BMB) near the site. Therefore the contractor must: (a) Transfer the elevation form BMA to establish BMB using a technique known as differential levelling (see sketch below) (b) Confirm the accuracy of the work by 'looping' back to BMA or by completing a 'circuit' to another known benchmark - in this case BMC (c) Check the mathematical correctness of the work as well as determine if the work falls within acceptable limits of TIK 3.826 BMA ELEV. = 220,000 |HI = 000022 0.841 2.549 TPI ELEY = HI = DATUM LINE = 0.000 ·257 0.583 BMB ELEV,= HI = 2.681 1.202 TP2 ELEV = HIS 133 BMC ELE/-222,2266