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Your present location:Return home >> PRODUCT CENTER >> COMPOSITE EXPANSION AND CONTRACTION INSTALLATIONS >> SSFB bridge expansion and contraction installation
  • Product name: SSFB bridge expansion and contraction installation
  • Product number: b01
  • Views : 53

  

brief introduction

SSFB series expansion device is SSF series expansion device based on my company and the joint development of the quality, according to the Ministry of transportation Jiaoke No. [1993]209 "about major national technology introduction, digestion, absorption and project feasibility study report of the bridge expansion device project technology development group complex", absorbing foreign advanced technology, organization and technical personnel of our company completed in 1994 the first module expansion device. Has been widely used in domestic and foreign large and medium-sized bridges, since the market has been welcomed by the majority of users.

SSFB series expansion device has the advantages of beautiful appearance, simple and reliable structure, long service life, installation, convenient maintenance, good compression and tensile properties. Multi joint design selection unit 80mm module, the expansion amount can be selected according to the integer times of 80mm according to the actual needs of the bridge. The single slit expansion mainly consists of three types of 40,60,80, respectively anchor bars of different structures to adapt to all kinds of bridge reserved slot.

SSFB series expansion device is suitable for the design load of straight bridge, highway I load curved bridge, skew bridge, bridge slope and other various types of bridges.

Structure characteristics

1, all types of hot rolling cavity machining, the overall effect is good, resistant to fatigue, impact resistance, and the design of waterproof rubber with a stop.

2, polymer material control spring with high compression (compression and rebound performance (up to 80%) can be recovered immediately after removing the pressure, deformation), but also has high tensile strength, impact elasticity, the longitudinal and transverse deformation characteristics of strong performance. At the same time has the cushioning effect and reduce the noise of the function of the impact force.

3, the elastic force transmission system which is composed of a pressing bearing, a sliding bearing and a control spring can transfer the telescopic force of the bridge component with the minimum displacement resistance to the expansion joint, and the expansion and contraction of each joint is uniform.

4, the waterproof rubber belt produced by the chloride rubber is pressed in the groove of the type steel through special tools, which has the advantages of good water tightness, and can adapt to the change of the structure.

Specification model

Model: SSFB-E.

SSF- expansion joint Chinese letter abbreviation

B- serial code

E- represents the volume size

* - said the same amount of expansion expansion joints under different displacement, currently only 160mm joints are A type, B type, C type.

Specification: SSFB series telescopic device is divided into 40mm, 60mm, 80mm,, 160mm, 240mm, 320mm, 400mm, 480mm, 560mm, 640mm, 720mm,, 800mm a total of twelve levels.

performance parameter

Execution standard: 327-2004 JT/T < highway bridge expansion device >

Design load: Highway I level load

Stretching resistance: less than 4kN/m

Displacement: 0 ~ Emm (which E for each level of telescopic devices)

Plane rotation angle: + 0.02rad

Elevation angle: + 0.02rad

Installation dimensions

Expansion of the amount of more than 80mm of the installation of the installation size as follows:


Model

 

 


Movement
mm

 

 


No. of cell
n

 

 


Gap of beam end
f(mm)

 

 

安Size of recess

Recess


Place of steel bar
r(mm)

 

h(mm)

b(mm)

SSFB160A

160

2

130

400

350

60

SSFB160B

160

2

130

240

350

60

SSFB160C

160

2

130

200

350

60

SSFB240

240

3

240

420

440

60

SSFB320

320

4

350

450

525

70

SSFB400

400

5

460

470

690

70

SSFB480

480

6

570

470

780

90

SSFB560

560

7

680

500

870

90

SSFB640

640

8

790

500

960

90

SSFB720

720

9

900

520

1050

90

SSFB800

800

10

1010

520

1140

90

 

Note:

1 the F value in the table is the gap between the beam and the middle temperature.

2 if you need to set up a retractable device, we can provide special design.

Expansion of the amount of less than 80mm single seam by the edge of the beam, waterproof rubber belt and anchor reinforcement and other components, the structure of various types of single joints and installation dimensions see the following chart.



 

SSFB-40A/60A Installation drawing of expansion joint
 

SSFB-80A Installation drawing of expansion joint
 

SSFB-40B/60B Installation drawing of expansion joint
 

SSFB-80B Installation drawing of expansion joint
 

SSFB-40C/60C Installation drawing of expansion joint
 

SSFB-80C Installation drawing of expansion joint