31 23 16 - Excavation.pdf

31 23 16 - EXCAVATION

Herbert, Rowland & Grubic, Inc. 31 23 16 - 1 000598.0465

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 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 23 16.13 - Trenching: Excavating for utility trenches.

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

5. Section 31 23 23 - Fill.

1.2 REFERENCES

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

1.3 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.

1.4 QUALIFICATIONS

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

1.5 JOB CONDITIONS

A. Existing Utilities and Services:

1. Contractor shall be responsible for verifying the location and/or depth of all utilities and services indicated within the areas of work.

2. Maintain existing utilities which must remain in service in the area of the excavation.

3. Record locations of underground utilities encountered.

B. Unclassified Excavation: No consideration will be given to the nature of materials encountered in excavating operations for structures. Therefore, as unclassified excavation, no additional payment will be made for difficulties occurring in excavating and handling of materials, including rock.

Herbert, Rowland & Grubic, Inc. 31 23 16 - 2 000598.0465

PART 2 - PRODUCTS – NOT USED.

PART 3 - EXECUTION

3.1 PREPARATION

A. Call Pennsylvania One Call System, Inc. 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.

J. Remove excess and unsuitable material from site.

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

Herbert, Rowland & Grubic, Inc. 31 23 16 - 3 000598.0465

3.3 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.

3.4 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