MONITORING GUIDE FOR ROADS - ANSA-EAP

1 MONITORING GUIDE FOR ROADS Classification of Road1. National Road - This road connects one province to another province. Its minimum thickness is meter (9 inches) and a width of meters for a two way Provincial Road connects the municipalities within the province. The minimum thickness is 8 inches but sometimes they adopted a 9 inches and a width of meters for a two way Municipal Road - refers to the road network within a town. Its thickness is meter (8 inches) with a width of meters for a two way traffic. 4. Barangay Road - refers to the road that connects the barangays from the town.

2 The minimum thickness is meter (6 inches) with an ideal width of meters. 5. Farm-to-Market Road - this refers to the access to transport of products to the market outlet. The minimum thickness is meter width an ideal width of Work items involved in road construction 100 Clearing and Grubbing This refers to the clearing of all vegetations and debris with in the road project and it should be confined within the work limit designated in the contract. How to Assess Clearing & Grubbing (Item 100)1. All surface objects like trees, stumps, roots and other protruding obstructions shall be removed.

3 2. The monitor should verify the existence of vegetations to be cleared prior to the execution of work3 For environmental concerns, the contractor should only confine their operations within the work limit specified specially when the project is new road opening4. Look for the change of methodThe area being cleared and grubbed will be the basis of 101 Removal of Structures This refers to the removal and satisfactory disposal of obstructions (Existing Structures) like buildings, fences, old pavements, abandoned pipelines, etc. which are not permitted to remain.

4 How to assess Item 101 Prior to placing of new work, all existing structures or obstruction indicated not to remain in the plan be 102 -Roadway Excavation It is the excavation and grading for roadways. Slope rounding including the removal of unsuitable materials from the are two classification of Earth Excavationb. Solid Rock Excavation How to Assess Excavation (Item 102: Widening or Opening) existing field profile/condition with that of the the class of soil that is being excavate and compare it with the class of soil loaded into the cost breakdown.

5 3 Verify the actual quantity of work to be done vis- -vis the programmed4. The planned width of the road is The roadbed is set with respect to the planned grades and slopes6. The newly constructed roadway is free from The quantity of rock and common earth excavation is calculated separately as basis of The road shall be provided with earth canal or side ditches to avoid scouring at the roadway due to water Verify the actual quantity of work to be done vis- -vis the 103 Structure ExcavationThis refers to the excavation for foundation of structures like riprap, trenches for drainage, ditches, 104.

6 Embankment Embankment is the placing and compacting of approved materials within the roadway where unsuitable materials has been removed, and the placing and compacting of material in holes, pits and other depressions within the roadway area. How to Assess Embankment (Item 104) for the established vertical control point. This will be used for the computation of the actual volume of the actual source of embankment materials and compare it with the approved quarry approved change in the quarry site/borrow pit location should bear a corresponding adjustment on the computation of Make sure that the materials used is granular such as sand and gravel or selected The embankment should be The embankment should be completed as planned and 105 Subgrade Preparation Description Subgrade Preparation is the removal of unsuitable and detrimental organic materials

7 Such as grass roots and sewage which can not be properly compacted which may eventually cause the surface to sink or make the surface uneven. How to Assess Subgrade Preparation (Item 105)a) Prior to commencing subgrade preparation, all culverts, cross drains (including their fully compacted backfill), ditches, drains and drainage outlets must be done ) The subgrade are prepared to the full width of the ) This should be properly graded, compacted and ) In a cut section, the subgrade is the original soil lying below the subbase and base ) The subgrade consist of the materials taken from nearby roadway cuts or from borrow )

8 Determine the area of work to be done and compare it with the SUB-BASE AND BASE COURSEItem 200 Aggregate Sub-base CourseItem 201 Aggregate Base CourseItem 200 & Item 201 : Aggregate Sub-base Course and Aggregate Base Course These items are the furnishing, placing and compacting an aggregate or sand and gravel sub-base or base course over a prepared road subgrade. How to assess these items? (Items 200 & 201)1. Verify the actual area and thickness of the compacted road base vis- -vis the For the materials, the coarse aggregates should be provided with right amount of binding materials and should be mixed The sub-base and base materials should be compacted in accordance with the Verify the source of materials Characteristics of the Sub-base / Base Courses:a) Should be free of large rocks/stones,b) The full width of the roadway should be properly ) The maximum compacted thickness is 150mm for each layer.

9 If the required thickness is greater than 150mm, the materials should be spread and compacted in two or more layers of approximately equal ) The road surface should be properly shaped to prevent water accumulation within the ) The sub-base and base should be properly prepared and compacted prior to placing of ) Verify the actual area and thickness of the compacted road base vis-a-vis the ) For the materials, the coarse aggregate should be provided with right amount of binding materials and should be mixed ) Verify the actual source of materials and compare it with the approved quarry site.

10 III. SURFACE COURSESItem 311 Portland Cement Concrete pavement (PCCP) A pavement of Portland cement concrete with or without reinforcement constructed over a prepared road base. How to assess Portland Cement Concrete pavement (Item 311)? A. Pre-Construction a. Prior to pouring of concrete, the road base should be Ensure that there is no excessive crowning on the base cross-sectional profile. This will create a substandard pavement in terms of thickness of the mid No boulders are laid over the prepared road base that will lessen the required thickness of the The forms should be rested over the prepared base and not embedded in the Dowel and tie bars are present with their specified size and ) River mix gravel or unsreened aggregates should not be used without the approval of the The aggregates are screened.