Lhasa River Bridge

Lhasa River Bridge

synonym

Lhasa River Bridge generally refers to Lhasa River Bridge

Lhasa River Bridge is a river crossing bridge in Lhasa City, Tibet Autonomous Region of China. It is located on Lhasa River and is one of the control projects of Qinghai Tibet railway

.

The construction of Lhasa River Bridge started on May 9, 2003

It was completed and put into operation on July 1, 2006

.

Lhasa River Bridge is 940.85m long

It is more than 3700 meters above sea level

The bridge deck is a single track grade I railway with a design speed of 120 km / h

.

Construction process

On August 4, 2002, the former China Railway Third Survey and Design Institute obtained the design right of Lhasa River Bridge

.

On May 9, 2003, the construction of Lhasa River Bridge started

.

On November 29, 2004, the construction of steel pipe arch of Lhasa River Bridge began

.

On January 31, 2005, the steel arch erection of Lhasa River Bridge was completed

On May 13 of the same year, the whole section of Lhasa River Bridge was completed and the main project was completed

.

On July 1, 2006, the Qinghai Tibet railway was put into operation and the Lhasa River Bridge was put into operation

.

Bridge location

Lhasa River Bridge is located in Lhasa City, Tibet Autonomous Region, China. It spans Lhasa River, about 2km away from Lhasa station and 5km away from Lhasa city center

To the north of the bridge site is Nyainqentanglha mountain, to the west is duilongdeqing district and Lhasa Economic and Technological Development Zone, and to the East is Lhasa city; the whole bridge section is a part of the west end of Qinghai Tibet railway

.

Architectural design

building structure

Design concept

The design concept of Lhasa River Bridge combines the local natural environment, Tibetan customs and architectural style, and the design concept integrates regional culture and plateau landscape elements

 

In the bridge type, the images of hada, flying Jingfan and snow mountain are introduced. It not only has a beautiful curve formed by the macro arch axis and a certain sense of volume, but also has a truss structure with rhythmic details, which has both national characteristics and the flavor of the times

 

. The bridge body is painted in white. The three span continuous steel arch of the main bridge looks like three white and soft hADAS floating on the Lhasa River to welcome guests from afar

 

The design of one large arch and two small arches and arch feet is also like the rolling plateau snow mountain

 

.

Design features

The main bridge of Lhasa River bridge adopts a combination system of five span continuous bridge and three span continuous steel arch bridge in the middle, and the main span adopts a double-layer curved arch structure

 

. The main bridge adopts the structure of concrete-filled steel tubular arch continuous beam, and the approach bridge adopts the form of prestressed concrete continuous box beam

 

. In order to reduce the heaviness of the arch ribs, the main bridge is made into double ribs of steel structure, the high and low ribs of the middle span are connected by circular tubes, and the high and low ribs of the two small spans are made into solid webs. The treatment of arch foot is completed by using the mechanical characteristics of bridge deck beam structure and concrete texture; the connection between arch foot and arch rib is strengthened by concrete rigid members, which realizes the transition from real to virtual in visual effect

 

. The main bridge piers are designed in corbel style

 

The main span pier is made into variable cross-section double cylindrical pier, and the unequal cross-section box girder of main span and approach bridge adopts smooth transition

 

The pier of approach bridge is designed as snow lotus pattern

 

.

Design parameters

Lhasa River Bridge is 940.85m long

 

The span layout of "36m + 72m + 108m + 72m + 36m" is adopted; the rise height of the middle arch is 23m, the rise height of the lower arch is 20m, and the rise height of the side arch is 15m

 

13 suspenders are set for each arch rib of middle hole arch and 8 suspenders are set for each arch rib of side hole arch

 

. The bridge deck is a single track grade I (non electrified) railway with a design speed of 120 km / h. The clear width of the bridge boundary is 4.88m, the clear height is 6.55m, and the bridge body is fortified according to the earthquake intensity of 8

 

.

Operation

On July 1, 2006, the "Tibet 2" celebration train sent by Lhasa passed through the Lhasa River Bridge, marking the official commissioning of the Lhasa River Bridge

 

.

Equipment and facilities

The whole maintenance passage of Lhasa River Bridge is equipped with lighting, which can form a colorful light band

 

.

Construction achievements

Technical problems

During the construction of Lhasa River Bridge, it is necessary to face the problems of ecological fragility, high cold and hypoxia, strong ultraviolet, strong wind and frozen soil on the Qinghai Tibet Plateau. In view of the special natural environment of the plateau, the Lhasa River bridge adopts the dry drilling method with rotary drilling rig to reduce the environmental pollution

 

. The steel structure of the bridge adopts the flexible fluorocarbon paint protection system, the structural concrete adopts the plateau durability concrete, and the organic silicon surface protection system

 

Double trestle gantry crane and thin pile cast-in-place support are adopted for the construction of main bridge beam arch

 

.

Honorary recognition

In 2008, Lhasa River Bridge won Luban Award of China Construction Engineering (national quality project)

 

.

Value significance

Lhasa River Bridge is not only one of the control projects of Qinghai Tibet railway, but also an important cultural landscape of Lhasa city. < I (review of China Construction) < / I

 

Address: Qushui County, Lhasa City

Longitude: 90.866651

Latitude: 29.363887

Chinese PinYin : La Sa He Da Qiao