大截面矩形顶管施工对既有管线影响研究.pdfVIP

第

41

卷第

5

期Vol.41

No.5工程力学

2024年5

月May2024ENGINEERING

MECHANICS1

文章编号：1000-4750(2024)05-0001-12

大截面矩形顶管施工对既有管线影响研究

丰土根，周

坤，张

箭，陈子昂，彭

朋

(河海大学岩土力学与堤坝工程教育部重点实验室，南京

210098)

摘

要：顶管施工会扰动邻近建筑物，危及工程安全。该文以苏州市城北路综合管廊元和塘段顶管工程为背

景，通过ABAQUS有限元分析软件建立三维模型，研究顶管下穿地下管线施工对管周土及既有管线影响，并

基于极限分析方法探讨了管线失稳模式。结果表明：大直径矩形顶管顶进方向的影响范围约为2倍顶管宽度，

两侧的影响范围约为1倍顶管宽度，地下管线到顶管轴线的水平距离为0.5倍~1倍顶管宽度时，应注意管线受

到的水平方向附加荷载是否会导致管线破坏；管线与顶管相对位置对管线破坏影响较为显著，越靠近顶管的管

线破坏越严重，滑移线由顶管两侧经由管线向地面发展，破坏部位由管线顶部两侧延伸至底部；除受与顶管相

对位置影响外，管线破坏模式还受矩形顶管形状影响，管线顶部及靠近顶管顶角区域破坏风险最大。

关键词：矩形顶管；数值模拟；地下管线；变形；极限分析上限法

中图分类号：TU990.3

文献标志码：A

doi:

10.6052/j.issn.1000-4750.2023.11.ST05

STUDY

ON

THE

IMPACT

OF

LARGE

CROSS-SECTION

RECTANGULAR

PIPE

JACKING

CONSTRUCTION

ON

EXISTING

PIPELINES

FENG

Tu-gen

,

ZHOU

Kun

,

ZHANG

Jian

,

CHEN

Zi-ang

,

PENG

Peng

(Key

Laboratory

of

Ministry

of

Education

for

Geomechanics

and

Embankment

Engineering,

Hohai

University,

Nanjing

210098,

China)

Abstract:

Pipe

jacking

construction

may

cause

disturbance

to

adjacent

buildings

and

structures,

endangering

the

safety

of

the

project.

Taking

the

Yuanhetang

section

of

Chengbei

Road

Comprehensive

Pipe

Gallery

in

Suzhou

City

as

the

background,

this

paper

established

a

three-dimensional

model

using

ABAQUS

finite

element

analysis

software

to

study

the

impact

of

pipe

jacking

construction

on

surrounding

soil

and

existing

pipelines.

Based

on

the

ultimate

analysis

method,

the

pipeline

instability

mode

is

also

discussed.

The

results

demonstrate

that

the

influence

range

of

the

large-diameter

rectangular

jacking

pipe

in

the

direction

of

jacking

is

about

twice

the

width

of

the

pipe,

and

the

influence

range

on

both

sides

is

about

one

width

of

the

pipe.

When

the

horizontal

distance

from

the

unde