LTPPhome路面养护维修指南

It

is

a

pleasuretobe

here

and

tell

you

about

LTPP.

I

am

(insert

name

and

title).Long-Term

Pavement

Performance

Program1Getting

to

KnowThe

Long

Term

PavementPerformance

ProgramThis

presentation

is

organized

around

three

topical

areas:informationabout

LTPP

--

its

origins,

structure,

and

operationthe

partnership

that

makes

the

programpossibleand,

the

products

--the

tools,

procedures,

and

guidelines

that

were

developed

by

the

program,

have

been

tested,

and

are

ready

for

use.So,

let’s

beginwithsome

background

on

LTPP.2.PRESENTATION

OBJECTIVES(介绍目的）Program:

What

It’sAboutLTPP

PartnershipLTPP的合伙企业LTPP

ProductsLTPP的成果In

1984,

the

Strategic

Transportation

Research

Study

was

initiated.

Its

focus

was

to

developa

research

agenda

that

would

produce

majorinnovations

for

increasing

the

productivity

and

safety

of

the

Nation’s

highway

system.

One

component

of

this

effort

was

the

Long

Term

PavementPerformance

(LTPP)

program--

a20

year

study

of

in-service

highway

pavements.Planning

for

the

LTPP

programbegan

in

1985.

It

wasa

cooperative

effort

ofAmerican

Association

of

State

and

Highway

TransportationOfficials

(AASHTO),

the

National

Cooperative

HighwayResearch

program(NCHRP),

the

TransportationResearch

Board

(TRB),

andtheFederal

Highway

Administration

(FHWA).

In

1987

with

the

passage

of

the

Surface

Transportation

Assistance

Act,

LTPP

was

launched

aspartof

the

Strategic

Highway

Research

Program(SHRP).3.LTPP

Development（LTPP的发展）Strategic

Transportation

Research

Stud战略运输研究计划LTPP的计划安排Strategic

Highway

Research

Program(LTPP:

$50

Million)1987-19921985-1987LTPP

Planning1984These

were

the

original

objectivesof

the

program.

Theywere

developed

by

the

LTPP

Technical

AdvisoryCommittee,

which

was

composed

ofapproximately

35

individuals

from

the

States,

industry,

academia,

and

FHWA.4.Original

Objectives（基本目标）

Evaluate

existing

design

methods.评价现有的设计方法

Develop

improved

design

methodologies

and

strategies

forthe

rehabilitation

of

existing

pavements.进一步完善现有路面的设计方法理论和养护对策

Develop

improved

design

equations

for

new

andreconstructed

pavements.进一步完善新建，改建路面的设计方程

Determine

the

effects

of

loading,

environment,

materialproperties

and

variability,

construction

quality,

andmaintenance

levels

on

pavement

distress

andperformance.确定荷载，环境，材料特性与变化，施工质量，养护水平对路面损坏与性能的影响。Determine

the

effects

of

specific

design

features

onTo

support

these

objectives,

two

types

of

studies

were

established.

The

first

type

--

the

General

Pavement

Studies

(GPS)

--

focus

on

the

mostcommonly

used

structural

designs

for

pavement.5.General

Pavement

Studies

(GPS)普通路面研究GPS-1GPS-2GPS-3GPS-4GPS-5GPS-6AGPS-6BGPS-7AAsphalt

Concrete(AC)on

Granular

Base粒料基层上的沥青混凝土AC

on

Bound

Base稳定基层上的沥青混凝土路面Jointed

Plain

Concrete

Pavement有接缝普通混凝土路面Jointed

Reinforced

Concrete

Pavement有接缝钢筋混凝土路面Continuously

Reinforced

Concrete

Pavement连续钢筋混凝土路面Existing

AC

Overlay

on

AC

Pavements在沥青混凝土路面上加铺沥青再生层GPS-7BGPS-9Eight

types

of

existingor

in-service

pavements

--

in

either

original

or

rehabilitated

condition

--

are

beingmonitored

throughout

NorthAmerica.

The

various

factors

being

looked

at

include

climatic,

geologic,

maintenance,

rehabilitation,

traffic,

and

other

service

conditions.GPS

sections

were

selected

fromexisting

pavements

--

asphalt

pavements

up

to

10

years

old

and

portland

cement

concrete

pavements

up

to

15years

old.GPS-6B

and

7B

are

sections

for

whichLTPP

was

able

to

doa

condition

survey

prior

to

the

overlay.6.General

Pavement

Studies

(GPS)普通路面研究

Focus

on

most

commonly

used

pavementdesigns集中最普遍使用的路面设计Experimental

design:

full

factorial实验设计：全因子设计

One

500

foot

section

per

location每个特定区域设一个500英尺的段落Primary

Factors主要因素

Subgrade:fine

&

course地基：优质或软弱Traffic: medium

&Secondary

Factors次要因素AC

thickness沥青混凝土厚度AC

stiffness沥青混泥土强度There

are

approximately

800

GPS

test

sections

throughout

North

America.

Their

locations

are

shown

on

the

map.这里有大约800个GPS实验点遍及美国北部，他们的区域表注在图上。7.General

Pavement

Studies

(GPS)Approximately

800

sectionsThe

second

type

of

study

--

the

Specific

Pavement

Studies

(SPS)

--

have

been

specifically

constructed

by

the

States

and

Provinces

to

investigatecertain

pavement

engineering

factors.8.Specific

Pavement

Studies

(SPS)特殊路面研究SPS-1

·

Strategic

Study

of

Structural

Factors

for

FlexiblePavements柔性路面结构组合的战略性研究Pavements刚性路面结构组合的战略性研究·

Preventative

Maintenance

Effective

for

FlexiblePavements柔性路面有效的预防性维护SPS-2SPS-3

·

Strategic

Study

of

Structural

Factors

for

RigidSPS-4SPS-5SPS-6SPS-7SPS-8

·

Preventative

Maintenance

Effective

for

Rigid

Pavem刚性路面有效的预防性维护SPS-9·

Rehabilitation

of

AC

Pavements沥青混凝土路面的重建修复The

SPS

test

sections

allowcritical

design

factors

to

be

controlled

and

performance

to

be

monitored

from

the

initial

date

of

construction.

Resultswill

provide

a

better

understanding

of

howselected

maintenance,

rehabilitation,

and

designfactors

affect

pavement

performance.9.Specific

Pavement

Studies

(SPS)Focus

on

certain

pavement

engineeringfactors集中可靠的路面工程要素Experimental

design:

half

factorial实验设计：部分因子设计Multiple

500

feet

sections

per

location每个特定区域设多个500英尺的段落Primary

Factors主要因素Subgrade:fine

&

course地基：优良或软弱Secondary

Factors次要因素

AC

drainage-yes,no沥青路面的排水设施：通畅10.Specific

Pavement

Studies

(SPS)Today

as

whenthe

programbegan,

LTPP’s

goal

is

provide

answers

to

HOW

and

WHY

pavements

performas

they

do.11.LTPP’s

GOALLTPP的目的To

provide

answers

toHOW

and

WHYpavements

perform

as

they

do!对路面反应提供定性定量的解答分析The

LTPP

programis

organized

around

several

core

functions.

The

first

of

whichis

data

collection

and

management.12.Data

Collection

andManagement数据的收集与管理·

Collect,

Process,

Store

and

ProvideReadily

Accessible,

Quality

Data对数据进行收集，处理，保存，并提供方便快捷，高质量的数据。LTPP’s

CORE

FUNCTIONSLTPP的核心作用The

followingis

a

timeline

showingthe

evolution

of

the

establishment

of

LTPP.

As

you

can

see,

very

soon

after

LTPP

was

funded

under

theSurface

TransportationAssistance

Act

of

1987,

LTPP

data

collectionstarted.LTPP:Understanding

Pavement

PerformanceLTPP：了解路面性能4The

Strategic

Transportation

Research

Study

recommends

creatingLTPP

as

an

element

of

a

Strategic

Highway

Research

Program8SHRP

Research

Plan

published.SHRP科学研究计划公布8LTPP

experimental

design

established.It

involves

2

studies:LTPP实验设计确定，它包括两个方面的研究：General

Pavement

Studies(GPS)普通路面研究Specific

Pavement

Studies(SPS)特殊路面研究

developing

an

LTPP

database

and

an

LTPP

dataanalysiseffort.发展中的LTPP数据库和LTPP数据分析成果8Surface

Transportation

Assistance

Act

(STAA)funds

SHRP

and

LTPP.STAA投资SHRP与LTPP8LTPP

datacollectionsbegins.LTPP数据收集工作开始198413.198619871989At

eachGPS

and

SPS

site,

data

on

distress,

roughness,

structural

capacity,

traffic,

climate,

pavement

condition,

material

properties,

and

othervariables

is

systematically

collected.14.LTPP

Data

CollectionClimate气候Traffic交通量MaterialProperties材料特性PavementStructure路面结构Pavementcondition路面状况This

information

has

been

used

to

construct

a

comprehensive

database

that

is

the

most

comprehensive

source

of

site-specific

information

onpavement

performance

in

the

world.15.LTPP

Database数据库MODULES模块Climatic气候的General普通Inventory目录Maintenance维护Monitoring监测Rehabilitation重建SMPSPS

(10)Traffic交通量Profile外形Friction摩擦Distress损坏etc其它TABLES表格 ELEMENTS要素Deflection偏差•Date日期Time时间Temperature温度Individual

dataelements单独的数据要素·

9

gigabytes

of

data

in

the

Database数据库有90亿字节的数据·

20

gigabytes

of

data

is

off

lineData

collection

and

management,

however,

is

of

limited

value.

To

derive

benefit

from

this

data,

engineers

must

analyze

it.

LTPP’s

data

analysiseffort

takes

the

raw

data

that

is

collected

fromover

2400

pavement

test

sections

throughout

North

America

and

converts

it

into

useableinformation.

Information

that

highway

engineers

and

managers

can

use

in

their

day

to

day

operations.16.LTPP’s

CORE

FUNCTIONS

Data

Collection

and

Management数据的收集与管理Data

Analysis数据分析—>Understand

Pavement

Performance了解路面性能Again

the

timeline

history

of

LTPP

illustrates

the

initiation

of

data

analysis

beginning

first

under

the

Strategic

Highway

Research

Programin

1990,and

continuing

under

LTPP.17.LTPP:

Data

Analysis8SHRP

analysis

begins.SHRP分析开始8First

FHWA-LTPPanalysisreportspublished.第一份公路LTPP分析报告公布8AASHTO

adopts

LTPP-verified

improved

design

procedures

forjointed

concrete

pavements.AASHTO采用LTPP校验了有接缝混凝土路面的改良设计程序8ISTEA

funds

continuation

of

LTPP.ISTEA对LTPP继续投资8Research

phase

of

SHRP

ends.SHRP科研阶段结束

8Management

of

LTPP

moves

toFHWA.对LTPP的管理转移到FHWA8First

publicreleaseof

data

from

LTPP

database.第一个公布于众的数据来源与LTPP数据库199019911992199419978SHRP-LTPP

analysis

reports

reports

published.SHRP-LTPP分析报告公布8FHWA-LTPP

analysis

begins.FHWA-LTPP分析开始LTPP

data

analysis

provides

the

value-add

to

the

data

collected.Analysis

helps

explain

how

pavements

performand

why

they

performas

they

do.Analysis

also

helps

to

validate

and

calibrate

existingprocedures,

to

develop

new

proceduresItprovides

quality

control

of

the

data.18.Purpose

of

Data

Analysis数据分析的目的Quantify

how

pavements

perform量化路面的性能Understand

why

they

perform

as

they

do推断路面工作的原理

Validate

and

calibrate

existing

procedures验证并校准现有的程序Develop

new

procedures开发新的程序Provide

quality

control

of

dataOver

the

years,

LTPP

analysis

has:provided

studies

of

the

variability

in

traffic,

materials,

and

performance

datacomparison

of

pavement

performanceimproved

designproceduresprovided

field

validation

ofpavement

design

procedures.19.Types

of

Data

Analysis

Done数据类型分析的完成

Studies

of

variability

in

traffic,

materials

anperformance

data对交通量,材料及工作特性变化的研究Development

of

improved

design

procedures发展改良的设计程序Comparison

of

pavement

performance路面性能的对比Field

validation

of

pavement

designproceduresIn

1999,

the

TRBExpert

Task

Group

on

Data

Analysis

identified

aneed

for

an

updated

strategic

plan

to

guide

project

identification

and

selectionactivities.

An

updated

plan

was

subsequently

developed

and

this

slide

shows

the

objectives

for

LTPP

analysis

as

set

forth

in

the

plan.A

copy

of

the

plan

is

available

atLTPP’s

website:20.Strategic

Analysis

Plan

Objectives战略分析计划的目标Traffic

characterization

and

prediction交通量的评定与预测Materials

characterization材料的评定Determination

of

environmental

effects

in

pavementdesign

and

performance

prediction环境对路面设计与性能预测影响的确定Evaluation

and

use

of

pavement

condition

data

inpavement

management在路面管理中路面状况数据的评价与使用

Development

of

pavement

response

and

performancemodels

applicable

to

pavement

design

and

performancepredictionLTPP

has

also

been

busy

translating

the

data

and

analysis

into

developingproducts

that

would

be

useful

to

the

pavement

design

engineer.21.LTPP’s

CORE

FUNCTIONSLTPP的核心作用

Data

Collection

and

Management数据的收集和管理Data

Analysis数据的分析Product

Development产品的开发·

Develop

and

Deliver

Usable

Tools开发并交付实用的工具In

the

late

1990s,

LTPP

began

releasing

several

products

aimed

at

improving

the

longtermperformance

of

pavements.To

aid

its

product

development

efforts

a

TRB-LTPP

subcommittee

was

formed

in

1999.

The

committee

has

developed:amission

statementa

product

development

processandidentified

specific

product

projects

for

2001.22.LTPP

ProductsLTPP成果199819998SeveralLTPPproductsreleased:几个LTPP产品的发行:8

DataPave,8

LTPPBind,8

Rigid

Pavement

DesignSoftware,刚性路面的设计软件8

FWD

and

Resilient

Modulus

Videotapes.FWD和回弹系数的录象带19964

FHWA-LTPP

product

implementation

efforts

launched

viaProduct

Preview

and

the

appointment

of

aformal

implementation

team.FHWA-LTPP产品的实施成果是通过产品的预演和指定正规的执行队伍4

New

versions

of

DataPave

and

LTPPBindreleased.数据编排的新译本与LTPP册发行NCHRP

product

development

projects.NCHTP产品的发展方案LTPP

is

also

playing

a

critical

role

in

the

development

and

use

of

the

2002

Design

Guide

now

under

development

in

NCHRP

1-37A.LTPP

data

will

be

used

in

a

two

stage

processof

validation

and

calibration.LTPP

data

and

procedures

play

an

integral

part

of

a

functioning

Guide.LTPP

data

makes

the

Guide

possible.23.LTPP’s

Role

in

the

2002

GuideLTPP在2002指南中的作用Validation

and

Calibration确认与校准Material

Characterization材料的表征 –LTPP

soil

Mr

test

procedureLTPP国家检测法–Source

of

typical

values典型评价源Environmental

Effects 环境影响Source

of

climatic

data气候资料源Evaluation

of

Existing

Pavements现有路面的评价LTPP’s

backcalculation

procedureLTPP的反算程序FWD

calibration

proceduresThe

final

core

function

of

LTPP

is

communication.LTPP

recognizes

the

need

to

ensure

that

its

partners

and

the

highway

community

in

general

have

access

to

the

best

and

latest

knowledge

resultingfrom

LTPP.LTPP’s

CORE

FUNCTIONSLTPP的核心作用

Data

Collection

and

Management数据收集与管理Data

Analysis 数据分析Product

Development产品的开发Communication通讯·Ensure

Access

to

LTPP

Program

Information24.

确保LTPP程序信息的使用Meetings

continue

to

be

an

effective

communication

tool.

FHWA-LTPP

staff

and

contractors

make

presentations

at

various

industry,

tradeassociation

and

government

meetings

and

through

LTPP

Regional

meetings

all

over

the

country.In

addition

LTPP

publishes:Research

Reports

that

document

FHWA-sponsored

analysis

ofLTPP

data.TechBriefs

that

provide

concise

summaries

of

recent

LTPP

data

analysis

projects.Product

Briefs

that

provide

anoverview

of

LTPP

products.Brochures

such

as

LTPP:

The

Next

Decade,

LTPP

Analysis:

Putting

theData

to

Work,

and

LTPP’s

Year

in

Review.LTPP

also

has

at

various

times

conducted

workshops,

sponsored

data

analysis

contests,

and

worked

withits

partners

to

develop

videos

on

keytechnical

topics.AND

DON’TFORGET

OUR

WEBSITE.

It

has

all

the

most

up

to

date

information

on

LTPP.25.Communication

Tools信息传递方式Meetings集会

Workshops/Contests学术讨论/辩论Publications出版物

bBrochures小册子

bTechBriefs技术说明

bProduct

Briefs产品说明Research

Reports科研报告Videos

录象Website网站It

is

important

to

recognize

that

LTPP

is

a

partnership.26.PRESENTATION

OBJECTIVES介绍目的LTPP

Program LTPP纲要Partnership:

Who

and

WhatLTPP

Products LTPP产品LTPP

partners

are:--

FederalHighway

Administration--

State

and

ProvincialHighway

Agencies--

the

Canadian

Strategic

Highway

Research

Program--

the

American

Associationof

State

and

Highway

Transportation

Officials--

the

Transportation

Research

Board[StageDirection

.

.

.

Read

the

list

inthe

ordergiven,

as

it

is

the

orderin

which

theypop

up]27.The

Partners合作者LTPPPartnersStateHighwayAgencies洲际公路代理ProvincialHighwayAgencies省公路代理AmericanAssociation

ofState

&

HighwayTransportationOfficials美国洲际公路运输办协会TransportationResearchBoard交通运输科学研究会CanadianStrategicHighwayResearchProgram加拿大战略公路研究计划FederalHighwayAdministration联邦公路管理署In

this

partnership:

FHWA

manages

the

data-to-day

operations

of

LTPP.

This

includes

the

collection,

processing,

and

dissemination

of

data;national

analysis

activities;

and

product

development

and

delivery

activities.The

States

and

Provinces

are

both

owners

and

customers

of

the

program.

As

owners

they

have

made

significant

investments

in

the

programbydesignating

test

sites,

constructing

and

monitoring

test

sections,

supplying

test

materials,

and

collecting

traffic

and

other

data

at

the

test

sites.

Ascustomers

of

the

program,

the

States

and

Provinces

are

the

primary

users

of

the

results

garnered

from

the

program.Fromtest

section

recruitment

to

the

adoption

of

LTPP-developed

methods,

procedures,

and

guidelines

as

standards

for

pavement

engineering,AASHTO

has

provided

the

collective

leadership

for

many

of

the

program’s

successes

to

date.TRB

operates

several

committees

that

provide

input

and

advice

on

LTPP’s

research

and

implementation

activities.28.The

LTPP

PartnersAt

Work （项目合作者）Data&

Communication数据管理与传送ProgramManagementTestSections测试实验段Implementation执行DataCollection数据收集Analysis

分析Product

Development

&Delivery产品的开发与交付FHWA国联邦公M路ana局gementStates

&

Provinces州或省TRB-LTPP

Committee TRB-LTPP委员会TRB-LTPP

Subcommittees TRB-LTPP小组委员会ExpertTaskGroups 专家工作小组TRBTask

Force

on

SHRP

Implementation 分派SHRP的实施Joint

Task

Force

on

Pavements组合划分路面Subcommittee

on

Materials 材料委员会Funding,

NCHRPAASHTO美国公路工作者协会Over

the

years

LTPP

has

developed

standards

for

materials

testing,

pavement

monitoring,

and

equipment

in

addition

tocalibrationprocedures.

More

recently,

LTPP

has

developed

several

new

products.

These

include.

.

.

(next

slide).29.PRESENTATION

OBJECTIVES介绍目的LTPP

ProgramLTPP计划LTPP

PartnershipLTPP合作者ProductsDataPave

isa

simple,

user-friendlysoftware

package

that

contains

most

of

the

data

currentlyavailable

from

the

LTPP

experiments

on

two

CD-ROMs.In

addition

to

the

actual

data,

DataPave

also

provides

users

withall

the

tools

needed

to

examine

and

work

withthe

data.30.DavePave:User-Friendly

Access

to

LTPP

DataWhat:性质：CD-ROM

with

most

of

the

data

from

LTPPexperiments.存有大量LTPP实验数据的光盘Provides

users

with

all

the

tools

needed

texamine

and

work

with

the

data.给用户提供完整的数据调用和操作工具State/Provincial

highway

agencies州或省的公路机构Industry企业Academia学术科研机构Highway-related

agencies

(AASHTO,FHWA,TRB)公路相关机构Capabilities:性能：Who

Should

Use:使用对象：LTPPBind

isa

software

tool

that

aids

highway

agencies

with

their

selection

of

the

most

suitable

and

cost-effective

Superpave

PG

foraparticularsite.LTPPBind

allows

the

user

to

determine

the

reliability

and

risk

associated

withabinder

grade.LTPPBind:Selection

of

Cost-Effective

SuperpaveAsphalt

Binder

Performance

Grades选择高效优质路面沥青结合料的性能等级Software

to

aid

selection

of

Superpave

PGfor

a

particular

site.为选择特定地区优质路面性能等级提供帮助的软件Provides

users

with

a

tool

to

select

bindegrades

that

are

less

restrictive,

morecost-effective,

and

meet

Superpave

PGconcepts给用户提供选择结合料等级的工具，它不仅限制少，效用高，而且还能适应优质路面性能等级概念的要求。

State/ProvincialWhat:性质：Capabilities:性能：31.ho

Should

Use:Rigid

Pavement

Design

software

is

a

Microsoft

Excel

spreadsheet

that

automates

the

design

and

analysis

procedures

in

the

1998

AASHTOsupplement

for

rigid

pavement

design

and

rigid

pavement

joint

design.Training

on

the

use

of

the

‘98

supplement

is

available

through

the

National

Highway

Institute.

The

course

is

entitled

“Concrete

pavement

Design