Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO HDG CHAPTER 14:2007
• Năm ban hành / Publication date: 2007
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: CULVERT INSPECTION, MATERIAL SELECTION, AND REHABILITATION GUIDELINE

Thay thế cho / Replace

AASHTO HDG V14:1999

• Số trang / Page: 53

Phạm vi áp dụng / Scope of standard

INTRODUCTION

Drainage facilities, like all other elements of the highway
system, deteriorate and decay due to the persistent forces of
nature. Processes such as abrasion, corrosion, and erosion can lead
to structural deficiencies and shorten the anticipated service life
of drainage facilities, eventually necessitating some type of
repair or replacement.

The purpose of this chapter is to discuss the various processes
that can lead to culvert failure and the factors to be considered
in selecting an appropriate repair or rehabilitative strategy. Any
determination of appropriateness must consider many of the factors
that led to the original design conclusions, such as existing
conditions, projections of future needs, material availability,
cost, and environmental compatibility. In addition, the designer
has the opportunity to evaluate what has or has not worked at the
locations in question and the ability to incorporate new
technologies that may not have existed at the time of the original
design.

In addition, this chapter will present information to help
designers select culvert materials that have the greatest potential
to attain the necessary design service life, given a variety of
site conditions and constraints.

Many thousands of kilometers [miles] of roadways were
constructed during the building boom of the 1950s and 1960s as part
of the development of our system of interstate highways. To protect
the vast investment in this system and the network of other State
and local roads, pavement management systems and bridge management
systems have been developed and adopted. Although bridge management
systems include those culverts with a span in excess of 6.1 m (20
ft), few entities have adopted similar systematic programs for the
inspection, evaluation, and repair of drainage structures with
spans below the 6.1-m (20-ft) "bridge" designation. Perhaps because
culverts are less visible than bridges and pavement, they have been
given far less attention. However, the aging of the interstate
system and other routes, combined with the lack of drainage system
inspection and maintenance, has resulted in hundreds of thousands
of culverts that are nearing the end of their useful service life.
This chapter will address these non-bridge sized culverts.