31 23 16 - Excavation.pdf

31 23 16 - EXCAVATION

Herbert, Rowland & Grubic, Inc. 31 23 16 - 1 005153.0436

SECTION 31 23 16 - EXCAVATION

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Excavating for paving, roads, and parking areas.

2. Excavating for slabs-on-grade.

3. Excavating for site structures.

B. Related Sections:

1. Section 31 05 13 - Soils for Earthwork: Stockpiling excavated materials.

2. Section 31 05 16 - Aggregates for Earthwork: Stockpiling excavated materials.

3. Section 31 22 13 - Rough Grading: Topsoil and subsoil removal from site surface.

4. Section 31 23 16.13 – Trenching: Excavating for utility trenches.

5. Section 31 23 16.26 - Rock Removal: Removal of rock during excavating.

6. Section 33 14 16 - Site Water Utility Distribution Piping.

7. Document 00 31 32: Geotechnical report; bore hole locations and findings of subsurface materials.

C. Blasting and the use of explosives are prohibited.

1.2 REFERENCES

A. Local utility standards when working within 24 inches of utility lines.

1.3 EXCAVATION CLASSIFICATION

A. Excavation required under this Section is unclassified. Excavation includes removal of all materials encountered, regardless of character, including soil, fill, shale, rock, hardpan, boulders, and miscellaneous subsurface materials.

B. The Contract Price includes excavation, handling, reuse, stockpiling, and lawful disposal of excavated materials. No separate measurement or payment will be made based on the character of the material encountered.

C. This excavation classification does not modify the rights and responsibilities of Owner and Contractor concerning differing subsurface conditions, Underground Facilities, or Hazardous Environmental Conditions under the General Conditions.

1.4 SUBMITTALS

A. Section 01 33 00 - Submittal Procedures: Requirements for submittals.

B. Excavation Protection Plan: Describe sheeting, shoring, and bracing materials and installation required to protect excavations and adjacent structures and property; include structural calculations to support plan.

Herbert, Rowland & Grubic, Inc. 31 23 16 - 2 005153.0436

C. Shop Drawings: Indicate soil densification grid for each size and configuration footing requiring soils densification.

1.5 QUALIFICATIONS

A. Prepare excavation protection plan under direct supervision of Professional Engineer experienced in design of this Work and licensed in the State of Pennsylvania

PART 2 - PRODUCTS - NOT USED.

PART 3 - EXECUTION

3.1 PREPARATION

A. Call Pennsylvania One Call System, Inc. at 1-800-242-1776 not less than three working days before performing Work.

1. Request underground utilities to be located and marked within and surrounding construction areas.

B. Identify required lines, levels, contours, and datum.

C. Protect utilities indicated to remain from damage.

D. Protect plant life, lawns, and other features remaining as portion of final landscaping.

E. Protect bench marks, survey control points, existing structures, fences, sidewalks, paving, and curbs from excavating equipment and vehicular traffic.

3.2 EXCAVATION

A. Underpin adjacent structures which may be damaged by excavation work.

B. Excavate subsoil to accommodate building foundations, slabs-on-grade paving and site structures, and construction operations.

C. Slope banks with machine to angle of repose or less until shored.

D. Do not interfere with 45 degree bearing splay of foundations.

E. Grade top perimeter of excavation to prevent surface water from draining into excavation.

F. Trim excavation. Remove loose matter.

G. Remove lumped subsoil, boulders, and rock up to 1/3 cu yd measured by volume. Remove larger material as specified in Section 31 23 16.26.

H. Notify Engineer of unexpected subsurface conditions.

I. Correct areas over excavated as directed by Engineer.

Herbert, Rowland & Grubic, Inc. 31 23 16 - 3 005153.0436

J. Remove excess and unsuitable material from site.

K. Repair or replace items indicated to remain damaged by excavation.

3.3 ROCK EXCAVATION

A. Remove rock using mechanical methods, including ripping, hydraulic hammering, drilling, sawing, or splitting.

B. Blasting and the use of explosives are not permitted.

3.4 FIELD QUALITY CONTROL

A. Section 01 40 00 - Quality Requirements: Field inspecting, testing, adjusting, and balancing.

B. Request inspection of excavation and controlled fill operations in accordance with applicable code.

C. Request visual inspection of bearing surfaces by inspection agency before installing subsequent work.

3.5 PROTECTION

A. Prevent displacement or loose soil from falling into excavation; maintain soil stability.

B. Protect bottom of excavations and soil adjacent to and beneath foundation from freezing.

C. Protect structures, utilities and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earth operations.

END OF SECTION