Competitive Price Large Movements Rubber Expansion Joint to Russian Federation

I
Q:What are the characteristics of the comb type expansion joint?
A:The following are the characteristics of the comb type expansion joint:

1.Expansion joint plate is the comb shaped anti-skid groove plate.It is a supporting structure which is engaged with each other from the gap between the left and the right of the bridge.Its structural rigidity is large and can withstand large horizontal displacement.Its flexible amount of up to 420mm.

2.The comb type expansion joint has low building height.It can be installed in the height of the bridge deck pavement and the beam does not need the reserved slot,which greatly facilitate the design and construction.

3.Its wide range of application.New or old bridge beam can be used,Especially suitable for replacement of large displacement bridge plate rubber expansion device.

4.When the car is running,there is smooth,comfortable,not jump car,and no noise.

5.It is convenient to transport and install components.Do not need extra long car transport, also do not use the crane to load and unload.

6.It has a very low cost.The price is less than the modular large displacement expansion device about 20%.

 
 
 
 
 
 
 
 
II
Q:Can you describe the installation detail steps of the comb type expansion joint?
A:The following are the installation detail steps of the comb type expansion joint:

Lofting and cutting asphalt concrete.According to the A width of lofting, attention is slit along the beam center line of left and right asymmetric cutting.

2.Excavation and clearing debris.The excavation depth should be at least H value.

3.Fixed bolt position.

4.Pouring over section area of C40 steel fiber reinforced concrete.

 
 
 
 
 
 
 
III
Q:What are the performance requirement of the comb expansion joint device?
A:

items	numerical value
Maximum horizontal frictional resistance of stretching or compressing (Kn /m)	≤5
The uniformity of deformation in tension or compression(mm) Total variation of maximum deviation	e≤80±1.5 e>80±2.0
The maximum vertical deviation or distortion of the compression or stretch(mm)	0.3~0.5

 
 
 
 

 
IV
Q:What's the propertities of the comb type expansion joint?
A:

models	movement accommodation	module length	module depth	module width	module weight	stud diam.
150	38mm	1750mm	A 35mm	B 240mm	28kg	D 12mm
200	50mm	1830mm	40mm	274mm	45kg	14mm
250	65mm	1830mm	46mm	356mm	62kg	14mm
300	80mm	1830mm	54mm	432mm	88kg	16mm
400	102mm	1830mm	54mm	590mm	150kg	16mm
650	165mm	1830mm	75mm	724mm	260kg	20mm
900	230mm	1830mm	93mm	890mm	375kg	24mm
1300	330mm	1220mm	127mm	1207mm	438kg	27mm

 
 



 
V
Q:How to arrange the expansion joint device in the bridge construction?
A:The following is the layout of the bridge expansion joint:

1. The arrangement of the telescopic device should be based on the overall arrangement of the bridge and the geometry of the bridge.Such as longitudinal slope,cross slope,plan Curvature,bearing arrangement,the direction and measurement of three direction displacement.

When the longitudinal horizontal displacement of the bridge expansion joint is less than 5mm and the vertical displacement is less than 0.5mm,there is no need to install the expansion device.Flexible and waterproof sealing material can be provided in the joint.

3.The curved bridge expansion device should be set on the radius of curvature.For the Modular expansion device,the maximum width between two middle or middle beam and side beam of the outer edge of the carriageway is less than 80mm.

4.The expansion device should not be set at the low point of the concave vertical curve of the bridge.