MONITOR EXISTING STRUCTURES
108-1 Description.
Provide settlement, vibration, and groundwater monitoring in accordance with the requirements of this Section. The work required under this Section does not modify the requirements or responsibilities for preservation of existing property from damage in accordance with 7-11.1. Evaluate the need for, design of, and provid e any necessary precautionary features to protect existing structures from damage. Employ construction methods that will not produce damaging vibrations, soil movement, soil loss , or instability o f existing structures.
108-2 Construction.
108-2.1 Inspection and Settlement Monitoring:
108-2.1 1 Miscellaneous Structures: When constructing foundations for
miscellaneous structures such as sign, signal, lighting, or intelligent transportation system structures, i nspect and document the condition of the existing structures shown in the Plans , and survey and monitor for settlement the existing structures shown in the Plans .
108-2.1 2 Structures o ther than Miscellaneous : When excavating or
constructing retaining walls and foundations for bridges , buildings, and structures other than miscellaneous struct ures, inspect and document the condition of the following existing structures, and survey and monitor for settlement the following existing structures:
1.as shown in the Plans.
2.within a distance of five shaft or auger cast pile diameters , or the estimated depth of drilled shaft or auger cast pile excavation, whichever is greater, measured from the center of these foundation elements.
3.within a distance of three times the depth of any other excavations.
4.within 200 feet of sheet pile installation and extraction operations .
5.within 100 feet of steel soldier pile installation and extraction operations.
6.for projects with pile driving operations, inspect and document the condition of all structures within a distance, in feet, of pile driving operations equal to 0.25 times the square root of the impact hammer energy, in foot -pounds. Survey and monitor for settlement all structures within a distance, in feet, of pile driving operations equal to 0.5 times the square root of the impact hammer energy, in foot -pounds.
108-2.1 3 Roadway Compaction O perations : When performing embankment
and asphalt compaction, inspect and document the condition of the following existing structures, and survey and monitor f or settlement the following existing structures:
1.as shown in the Plans.
2.within 75 feet of vibratory compaction (in any vibratory mode) operations.
108-2.1 4 Inspection and Documentation Requirements : Inspect and document
the condition of the existing structures and all existing cracks with descriptions and pictures using a qualified Specialty Engineer . Submit two reports , signed and sealed by the Specialty Engineer, documenting the condition of the structures . Submit one report before beginnin g the construction operations that may affect the existing structures such as but not limited to foundation construction, excavations, vibratory compaction, dewatering and retaining wall FY 2023-24 Return to Table of Contents construction. Submit the second report documenting the condition of t he structures after the construction operations are complete. Include in the reports the Specialty Engineer’s assessment of any damage present, and in the event of damage, the Specialty Engineer’s assessment of whether the observed damage is the result of the construction operations . Submit both reports to the Engineer . Inspecting and documenting the condition of bridges , sign, signal, lighting, and ITS structures owned by the Department is not required except when shown in the Contract Documents. The Department will make the necessary arrangements to provide right -of-way entry to the existing structures.
108-2.1 5 Settlement Surveying and Monitoring Requirements: Obtain the
Engineer’s approval for the number and location of monitoring points. Survey and monitor the settlement of structures, providing +/ -0.005 foot accuracy, recording elevations to 0.001 foot:
1.before beginning construction
2.daily, during the driving of any casings, piling, or sheeting,
3.daily, during compaction
4.daily, during foundation drilling
5.weekly, for two weeks after stopping pile driving
6.during excavation
7.during blasting
8.or, as directed by the Engineer Upon either detecting movement of 0.010 feet or damage to the structure, immediately stop the construction operations affecting the structure , backfill any open excavations, notify the Engineer and submit a corrective action plan for acceptance by the Engineer. Submit settlement monitoring rec ords to the Engineer on a weekly basis.
108-2.2 Vibration Monitoring: When shown in the Contract Documents, employ a
Specialty Engineer to provide a system which will continuously monitor and record ground vibration levels near the structures shown in the Plans during the operation of any equipment causing vibrations or during blasting operations. Provide vibration monitoring equipment capable of detecting velocities of 0.01 inches per second or less. Obtain the Engineer’s approval of the number and locati ons of the monitoring points and install the system per the Specialty Engineer’s recommendations. Submit the vibration records to the Engineer within 24 hours of performing the monitoring activity. Upon either detecting vibration levels reaching 0. 5 inches per second or damage to the structure, immediately stop the source of vibrations, backfill any open excavations, notify the Engineer and submit a corrective action plan for acceptance by the Engineer .
108-2.3 Groundwater Monitoring: When shown in the Contract Documents , install a
piezometer at the right -of-way line and near any existing structure that may be affected by dewatering operations, or as directed by the Engineer . Monitor the piezometer and record the groundwater elevation level each day that dewatering activities are performed and for one week after activities have ceased, or on a schedule approved by the Engineer . Notify the Engineer of any groundwater lowering near the structure of 12 inches or more.
108-3 Method of Measurement.
The quantities to be paid for will be lump sum, completed and accepted. No separate payment will be made for the design, furnishing , construction, and removal of precautionary features, such as but not limited to sheeting, shoring, or bracing, installed for prot ection of existing structures. FY 2023-24 Return to Table of Contents
108-4 Basis of Payment.
Price and payment will be full compensation for all work and materials specified in this Section. Payment will be made under: Item No. 108 - 1 Monitor Existing Structures - Inspection and Settlement Monitoring - lump sum. Item No. 108 - 2 Monitor Existing Structures - Vibration Monitoring - lump sum. Item No. 108 - 3 Monitor Existing Structures - Groundwater Monitoring - lump sum. FY 2023-24 Return to Table of Contents CLEARING CONSTRUCTION SITE SECTION 110 CLEARING AND GRUBBING
110-1 Description.
Clear and grub within the areas shown in the Plans. Remove and dispose of all trees, stumps, roots and other such protruding objects, buildings, structures, appurtenances, existing flexible asphalt pavement, and other facilities necessary to prepare the area for the proposed construction. Remove and dispose of all product and debris not required to be salvaged or not required to complete the constr uction. Perform miscellaneous work necessary for the complete preparation of the overall project site as specified in 110-10.
110-2 Standard Clearing and Grubbing.
110-2.1 Work Included: Completely remove and dispose of all buildings, timber, brush,
trees, stumps, roots, rubbish, debris, existing flexible pavement and base, drainage structures, culverts, and pipes. Remove all other obstructions resting on or protruding through the surface of the existing ground and the surface of excavated areas. Perform standard clearing and g rubbing within the following areas:
1.All areas where excavation is to be done, including borrow pits, lateral ditches, right -of-way ditches, etc.
2.If constructing over an existing road, remove existing asphalt pavement. If shown in the Contract Documents, remove existing pavement base.
3.All areas where roadway embankments will be constructed .
4.All areas where structures will be constructed, including pipe culverts and other pipe lines.
110-2.2 Depths of Removal of Roots, Stumps, and Other Debris: In all areas where
excavation is to be performed, or roadway embankments are to be constructed, remove roots and other debris to a depth of 12 inches below the ground surface. Remove roots and other debris from all exca vated material to be used in the construction of roadway embankment or roadway base. Plow the surface to a depth of at least 6 inches, and remove all roots thereby exposed to a depth of at least 12 inches. Completely remove and dispose of all stumps within the roadway right-of-way. Remove all roots, etc., protruding through or appearing on the surface of the completed excavation within the roadway area and for structures, to a depth of at least 12 inches below the finished excavation surface. Remove or cut off all stumps, roots, etc., below the surface of the completed excavation in borrow pits, material pits, and lateral ditches. In borrow and material pits, do not perform any clearing or grubbing within 3 feet inside the right -of-way line. Within all other areas where standard clearing and g rubbing is to be performed, remove roots and other debris projecting through or appearing on the surface of the original ground to a depth of 12 inches below the surface, but do not plow or harrow these areas.
110-2.3 Boulders: Remove any boulders encountered in the roadway excavation (other
than as permitted under the provisions of 120 -7.2) or found on the surface of the ground. When approved by the Engineer place boulders in neat piles inside the righ t of way. The Contractor FY 2023-24 Return to Table of Contents
Source: Florida Standard Specifications for Road and Bridge Construction, 2024 Edition. Pages 174–176 of 1,299.