00232867

Component

https://onlinepubs.trb.or...hrbproceedings/6/6-010.pdf

SUBGRADE STUDIES WERE CONDUCTED TO DETERMINE: (1) THE PRACTICALITY OF VARYING THE TYPE OR DESIGN OF ROAD SURFACE TO SUITE SUBGRADE CONDITIONS, (2) THE EFFICIENCY OF VARIOUS TYPES OF DRAINAGE, SUBGRADE TREATMENT AND SUBBASES, AND (3) THE RELATIVE ECONOMY AND SUBGRADE REINFORCEMENT AND CHANGE IN PAVEMENT DESIGN AS COMPENSATION FOR VARYING SUBGRADE CONDITIONS. STUDIES OF ROADS IN SERVICE WERE CORRELATED WITH US BUREAUS OF SOILS DATA, LABORATORY TESTS ON SUBGRADE SOILS, AND OFFICE COST RECORDS. A COMPLETE OUTLINE IS GIVEN OF SUBGRADE STUDIES OF THE BUREAU, TOGETHER WITH A DESCRIPTION AND DISCUSSION OF THE ROAD SURVEY PROCEDURE. A METHOD IS PROPOSED FOR CORRELATING PAVEMENT CONDITION WITH SUBGRADE CHARACTERISTICS. THE SUMMARY RECORD OF CONDITIONS SURVEY IS THE ANALYTICAL DIGEST OF THE ENTIRE SURVEY. IT CONSISTS OF CONDENSED INFORMATION FROM WHICH DEDUCTIONS MAY BE DRAWN AS THE VARIABLES IN ONE ROAD AS COMPARED WITH SIMILAR VARIABLES IN ANOTHER PROJECT. THE INFORMATION IS OBTAINED DIRECTLY FROM THE PERMANENT RECORD CHARTS BY SCALING AND TOTALLING THE RESPECTIVE LENGTH OF THE INDIVIDUAL CULVERTS, FILLS, AND GRADE SECTIONS IN EACH SOIL TYPE. THE ORIGINAL GROUND LINE IS USED IN THESE COMPUTATIONS. THE RECORD SHOWS IN DETAIL THE SLAB CONDITION CORRESPONDING TO: (1) CUT, FILL, AND GRADE SECTIONS IN EACH SOIL TYPE, (2) EACH SOIL TYPE INCLUDING THE CUT, FILL AND GRADE SECTIONS, (3) CUT, FILL, AND GRADE SECTIONS IN ALL SOIL TYPES COMBINED, (4) THE ENTIRE LANGTH OF ROAD REPRESENTED BY THE SURVEY, AND (5) THE GEOLOGICAL CHARACTER OF THE SOIL. IN MANY SURVEYS, INFORMATION CONCERNING THE EFFECT OF THE SOIL TYPE AND CUTS AND FILLS UPON SLAB AND SURFACE CONDITION WOULD INCLUDE A RELATIVE SHOWING IN THE SUMMARY RECORD OF: (1) THE WIDTH OF CRACKS AND JOINTS, (2) THE REVELLING OF CRACKS AND JOINTS, (3) THE FAULTING OF SLABS, AND (4) THE SCALING OF THE SURFACE. DATA CONTAINED IN THE SUMMARY RECORD PERMIT RELATIONSHIPS TO BE ESTABLISHED BETWEEN THE SLAB OR SURFACE CONDITION AND THE RESULTS OF THE SOIL TESTS.

Vol 6, pp 113-133, 3 FIG, 1 TAB. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01488025

1927

Highway Research Board Proceedings

Digital/other

Condition surveys; Drainage; Economics; Pavement design; Slabs; Soil stabilization; Soil tests; Studies; Subbase (Pavements); Subgrade (Pavements); Surface course (Pavements)

Subbase

Economics; Geotechnology; Highways; Hydraulics and Hydrology; Pavements

TRIS, TRB

Jun 11 1971 12:00AM

• A COMPARISON OF ROAD CONDITIONS WITH ATTERBERG'S LIMITS AND THE OTHER STANDARD SOIL TESTS
• A STUDY OF THE MOISTURE CONTENT OF OHIO SOILS
• ADDRESS ON THE HIGHWAY AND THE LABORATORY
• ANALYSIS OF STRESSES IN CONCRETE PAVEMENTS DUE TO VARIATIONS OF TEMPERATURE
• BITUMINOUS MATERIALS FOR SURFACE TREATMENT
• BRIEF REVIEW OF ALKALI ACTION ON PORTLAND CEMENT CONCRETE
• COLLECTION AND DISPOSITION OF MOTOR VEHICLE REVENUES
• CONCRETE AND CONCRETE AGGREGATES
• DISCUSSION OF PAPER ON THE METHODS AND POSSIBILITIES OF ROAD-SOIL INVESTIGATIONS
• DISCUSSION OF PROGRESS REPORT ON CULVERT INVESTIGATION
• DISCUSSION OF PROGRESS REPORT ON LOWCOST IMPROVED ROADS INVESTIGATION
• DISCUSSION OF REPORT OF COMMITTEE ON CHARACTER AND USE OF ROAD MATERIALS. I. CONCRETE MATERIALS
• DISCUSSION OF REPORT OF COMMITTEE ON CHARACTER AND USE OF ROAD MATERIALS. II. BITUMINOUS MATERIALS
• DISCUSSION OF REPORT OF COMMITTEE ON ECONOMIC THEORY OF HIGHWAY IMPROVEMENT
• DISCUSSION OF REPORT OF COMMITTEE ON HIGHWAY FINANCE
• DISCUSSION OF REPORT OF COMMITTEE ON HIGHWAY TRAFFIC ANALYSIS
• DISCUSSION OF REPORT OF COMMITTEE ON MAINTENANCE
• DISCUSSION OF REPORT OF COMMITTEE ON STRUCTURAL DESIGN OF ROADS
• EXTRACT FROM REPORT ON VIRGINIA FEDERAL AID PROJECT 371-C
• FIELD CONTROL OF CONCRETE MAKING-A STUDY OF LATE PRACTICE
• FILL SETTLEMENT IN PEAT MARSHES
• IMPACT FORCES EXERTED BY THE MOTOR TRUCK ON THE HIGHWAY
• INVESTIGATIONS OF AIR RESISTANCE ON AUTOMOBILES
• INVESTIGATIONS OF ASPHALTIC PAVING MIXTURES RELATIVE TO DEFORMATION OF SURFACES UNDER TRAFFIC
• PAPER ON THE METHODS AND POSSIBILITIES OF ROAD-SOIL INVEST- IGATIONS
• PAVEMENT DISPLACEMENT DUE TO WATER AND FROST
• PROGRESS REPORT ON A FIELD EXPERIMENT ON INTRODUCTION OF PLANES OF WEAKNESS IN CONCRETE SLABS
• PROGRESS REPORT ON CULVERT INVESTIGATION
• PROGRESS REPORT ON LOW-COST IMPROVED ROADS INVESTIGATION
• PROGRESS REPORT ON THE EXPERIMENTAL CURING SLABS AT ARLINGTON, VIRGINIA
• PROGRESS REPORT ON TIRE WEAR INVESTIGATION
• REPORT OF COMMITTEE ON HIGHWAY TRAFFIC ANALYSIS
• REPORT OF COMMITTEE ON MAINTENANCE. I. MAINTENANCE OF CONCRETE PAVEMENTS
• REPORT OF COMMITTEE ON MAINTENANCE. II-SNOW REMOVAL AND SNOW REMOVAL EQUIPMENT
• REPORT OF COMMITTEE ON MAINTENANCE. III-COVERING FOR POORLY CONSTRUCTED AND DISINTEGRATING CONCRETE ROADS
• REPORT OF COMMITTEE ON MAINTENANCE. IV-ANNUAL REDUCTION THICKNESS OF GRAVEL ROADS UNDER DIFFERENT TRAFFIC AND EFFECT OF DUST PALLIATIVES
• REPORT OF COMMITTEE ON MAINTENANCE: V. MAINTENANCE COSTS AS AFFECTED BY THE TYPE OF PAVEMENT AND AMOUNT OF TRAFFIC
• REPORT OF DIRECTOR
• REPORT ON FORMATION OF SPECIAL COMMITTEE ON CAUSES AND PREVENTION OF HIGHWAY ACCIDENTS
• SOME PRINCIPLES INVOLVED IN BITUMINOUS MACADAM CONSTRUCTION
• SUB-BASE TESTS ON ROUTE 26, WASHINGTON COUNTY, OHIO
• SUBGRADE MATERIALS AND TESTS
• THE NORTH CAROLINA ROAD TEST TRUCK
• THE SLAKING TEST
• THINNER PAVING BRICK
• TIRE WEAR INVESTIGATION