Attachment 10 - Topographic Survey Report Rev01 - Al Qassim.pdf

Location QASSIM BASE

DATE 24-03-2021

Client Tetra Tech Inc. REV. NO 01

Project Name ROYAL SAUDI LAND FORCE AVIATION COMMAND (RSLFAC) 5

AIRBASES, SAUDI ARABIA

OEO-JOB

2021-07

Prepared By Mohamed ELsayed REF 0321-R-0216

Topographic

Survey

Report

Prepared

For

Tetra Tech

RSLFAC

PROJECT

Survey Department

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TABLE OF CONTENTS

Contents:

1- Introduction

2- Scope of Work

3- Survey Location

4-Survey Equipment

5-Survey Methodology

5.1 Recovery of Permanent Bench Marks

5.2 Installation of bench marks

5.3 Topographic survey

5.4 Data processing and drawing

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1. Introduction Detailed and accurate topographic survey is one of the major factors in the success of any engineering project, at both design and construction stage. Comprehensive and detailed topo survey at early stage of design always eases up the design work and minimizes any unexpected major changes later at construction stage.

Ayed Eid Al Osaimi Engineering Consulting Office has been awarded the topographic survey ROYAL SAUDI

LAND FORCE AVIATION COMMAND (RSLFAC), SAUDI ARABIA.

This survey is based in the survey area details provided by the client. The topographic survey shown here is located inside the boundary of Land Forces Aviation Institute, Qassim, Kingdome of Saudi Arabia.

The survey team examined the site, become familiar with all existing conditions, and evaluated the conditions with respect to performance of the work.

2. Scope of Work

The scope of work involves conducting a detailed Topographic survey of the proposed sites shown hereon.

1- Topographic Survey

The Topographic survey shows all the surface features, existing grade elevations, extent of existing paving (asphalt / concrete), existing structures, process equipment, existing road width, catch basin, manholes, street lighting, cable marker, pipe line markers underground utility markers, surface ditches, wales, fences gates, building concrete, walkways, fire hydrants, valve boxes, junction boxes, shelter, fence, poles (electrical, cameras, traffic signals, traffic light, etc.) And all above grade man made and artificial features

Field Work: - The sites area of 1 Ha is according to approved BOQ by the client. A 10m *10m grid was used to calculate the contours lines on all sites using GPS in RTK and Stop / Go Mode.

Survey Design: - The results are 2 types of information, spots elevation and contour lines, section results. The drawing is presents in a CAD format processed thru civil 3D 2015.

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3. Survey Location The survey areas specified by the client is shown in the Google image below.

Figure 1: - Google Earth Image

QASSIM

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4. Survey Equipment

All instruments, equipment, and personnel to accomplish the field survey. Survey instruments have accuracy and the technology appropriate for the intended application.

Surveying instruments are calibrated to specifications in manufacturer’s recommendation.

OEO is using the latest state of the art Surveying Equipment starting from automatic level, Total station and GPS systems as mentioned in Table 1.

The following table presents the equipment used:

Table 1: Equipment list

ITEM MODEL

Global positioning survey Trimble R10-2

EDM survey TOPCON MG 52

Leveling survey NIKON AC-2s

Trimble R10-2

PERFORMANCES

Advanced Trimble R-Track™ Technology Unmatched tracking of GNSS satellite signals Superior performance in challenging RTK applications Flexible system design Remote configuration and access Advance surveying with Trimble R-Track Global Navigation Satellite System (GNSS).

GNSS have a separate geodetic antenna to reduce multipath interference. GNSS is the standard term for satellite navigation systems that provide geospatial positioning with global coverage.

GNSS allows receivers to determine their location accurately using signals transmitted along a line-of-sight path from the satellites to terrestrial receivers. Receivers can also calculate the precise time as well as position, which can be used as a reference for scientific experiments.

GNSS systems include the United States' GPS, Russian Federation's GLONASS, the European Union's Galileo, and China's Compass system.

POSITIONING

The latest advancements in Trimble R-Track technology consistently deliver precise positioning performance in the most challenging GNSS conditions. More satellites and better reception keep you working throughout the day. Our latest advancement, Trimble R-Track with Signal Prediction™ is a giant step for the surveying industry. Signal Prediction compensates for intermittent RTK signals, enabling extended operation after an interruption.

PROTOCOL

The new CMRx protocol provides maximum compression of corrections to optimize communications bandwidth and fully utilize all of the

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SATELLITE AND SIGNALS

The Trimble R10 GNSS supports a wide range of satellite signals, including GPS L2C and L5 and GLONASS L1/L2 signals. In addition, Trimble is committed to the next generation of modernized GNSS configurations by providing Galileo-compatible products available for customers well in advance of Galileo system availability in support of this plan, the new Trimble R10 GNSS is capable of tracking the experimental GIOVE-A and GIOVE-B test satellites for signal evaluation and test purposes.

QUALITY AND CORRECTION

The Trimble R10 GNSS includes a built-in TX/RX UHF radio, enabling the ultimate flexibility for rover or base operation.

As a base station, the internal NTRIP caster provides you with customized access to base station corrections

TOPCON MG 52

The Electronic Total Station is also one of the most advanced EDM Total Station with optical plummet correction for base centralizing TOPCON MG 52

DISTANCE MEASUREMENT:

Measurement of distance is accomplished with a modulated infrared carrier signal, generated by a small solid-state emitter within the instrument's optical path, and reflected by a prism reflector. The modulation pattern in the returning signal is read and interpreted by the computer in the total station Total station can measure distances with an accuracy of about 1.5 millimeters (0.0049 ft) + 2 parts per million over a distance of up to 1,500 meters (4,900 ft).

ANGLE MEASUREMNET:

The total station instrument measure angles by means of electro-optical scanning of extremely precise digital bar-codes etched on rotating glass cylinders.

Total stations can generally measure angles to 5 or 10 arc-seconds.

Automatic Level AC-25 NIKON The Level is one the most advanced Automatic Double Bubble sensor – NIKON AC-2s It makes use of a compensator, which ensures that the line of sight is always horizontal regardless of whether or not the housing of the telescope. It also reduces the effect of minor settling of the tripod to the actual amount of motion instead of leveraging the tilt over the sight distance Three level screws are given to adjust the instrument level.

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5. Survey Methodology The Topographic Study of the project area collected the details, accurate and as much precise information as possible, about the existing condition of the project site. Conducted procedures were based on the activity type.

5.1 Recovery of Existing Benchmarks:

Existing Benchmarks details used for the topographic survey provided by the client representative (see Appendix 1) at the site:

UTM/WGS84 ZONE 38

Point# Northing Easting Elevation*

BM1 2910339.161 375807.786 650.485

BM2 2910296.493 375761.767 650.104

BM3 2910218.840 375801.553 649.920

*Vertical Datum is the ellipsoidal height.

All coordinates and elevation are in meters.

The Geographical Location of the Benchmarks

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5.2 Topographic survey:

Topographic survey was carried out, and all features and structure were surveyed as well. The entire survey was conducted by using GPS in Stop/go and RTK mode.

The given reference control points by the client representative at the site were checked for horizontal and vertical accuracy for site calibration.

The topographic survey has been done in sufficient detail to show the location, elevation and configuration of all site features that may be located within, or bordering, the site as shown on project documents and drawings at the nominal scale. Features been included as the following:

Existing Building, Concrete and Steel Structures, Equipment Foundations exterior corners and dimensions.

Roads.

The Survey includes centerlines, edges of roads, edges of shoulders, curbs, walkways and width. Survey includes edge of each surface, high points and low points and surface type for Paving, Slabs, Fences, Electric Poles, Manholes, Hydrants and Utility Appurtenances. For more information, kindly check the topographic survey drawings.

The following Abbreviations have been used during The Topographic survey:

Abbreviations

BM Bench Mark

RTK Real Time Kinematic M Meter

UTM Universal Transverse Mercator

WGS World Geodetic System GPS Global Positioning System

The codes have been used during The Topographic survey as following:

mohamed Rectangle mohamed Typewriter 2M Chain Link Fence

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List of Geotechnical Tests

UTM/WGS84 ZONE 38

PT-ID NORTHING EASTING ELEVATION

BH01_10M 2910286.905 375823.133 650.08

BH02_10M 2910263.778 375835.097 650.18

BH03 2910268.338 375779.015 649.87

CBR01 2910297.198 375808.075 650.15

CBR02 2910280.14 375772.31 649.93

FDT01 2910259.853 375803.157 650.09

SRT01 2910262.924 375808.321 650.07

TP01_3M 2910259.921 375803.174 650.08

TP02_3M 2910291.889 375790.302 650.06

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5.4 Data processing and drawing:

All the collected data has been processed in OEO Khobar office. The software involved are:

1 Trimble Geomatics Office 2 Surfer 3 Global Mapper 4 Windows Mobil center 5 Microsoft office 6 AutoCAD (Civil 3D)

The results include the collected raw data and the processed drawings. the drawings in electronic (digital) and A0 size paper format at a scale that maximizes the visibility of details on the ground.

Drawings include the following:

All permanent bench marks.

All above ground infrastructure.

All services, Spot elevations.

Any hazards noticed on site.

Any obstructions to construction.

Strings with similar properties for different elements of the ground and built information are saved in separate layers. Layers named appropriately for different features of the ground covering all elements mentioned in this document (e.g., buildings, roads, curb, drainage, centerlines etc.). All strings have x, y and z (coordinates and level) information for the start end and intermediate points.

Drawings with contour intervals of 0.25m are provided with details to highlight drainage paths.

Electronic drawings provide all details can be extracted and reviewed electronically.

The drawing provides true north, the elevations shown for building floors, inverts of drains and culverts, crowns of roads, ground or pavement surface at building corners, tops of curbs, flow lines of gutters, tops of manholes and vaults and other identified features.

mohamed Typewriter Appendix 1