Modular Expansion Joints Accommodate 160–3000 mm

Modular Expansion Joints Accommodate 160–3000 mm Movements
Modular expansion joints, also called GQF-MZL modular bridge joints, are composed by boundary beams, middle beams, cross girders, displacement control systems, bridge bearings, anchoring components and rubber sealing belts. modular expansion joints are suitable for longitudinal movements of 80 mm to 1200 mm.

Having good bearing capacity and stability, modular expansion joints can accommodate movements in every direction and rotations about every axis. Their individual displacement control and load transfer systems enable bridges to adapt the movement of the beam caused by temperature and ensure the traffic safety.

This is the top of modular expansion joint.
MEJ-1: Top of modular expansion joint

This is the bottom of modular expansion joint.
MEJ-2: Bottom of modular expansion joint

Structure

Modular expansion joints are composed by boundary beams, middle beams, cross girders, displacement control systems, bridge bearings, anchoring components and rubber sealing belts.

Specification

Table 1: Specification of Modular Expansion Joints
Type    Displacement
(mm)    Width
(mm)    Interval
(mm)    Height of Support Beam
(mm)
MZL-80    80    80–160    50–130    700
MZL-160    160    160–320    80–240    700
MZL-240    240    240–480    160–400    800
MZL-320    320    320–640    220–540    800
MZL-400    400    400–800    310–710    800
MZL-480    480    480–960    400–880    800
MZL-560    560    560–1120    490–1050    800
MZL-640    640    640–1280    550–1190    800
MZL-720    720    720–1440    590–1310    800
MZL-800    800    800–1600    620–1420    900
MZL-880    880    880–1760    700–1580    900
MZL-960    960    960–1920    780–1740    900
MZL-1040    1040    1040–2080    810–1850    900
MZL-1120    1120    1120–2240    890–2010    900
MZL-1200    1200    1200–2400    970–2170    900
Feature

Safe & reliable. The load-bearing structure and displacement control system of modular expansion joints are separate parts. When under stress, these two parts will not interfere with each other and have a clear division of labor to provide security assurance.
Uniform displacement. Modular expansion joints meet the requirements of high processing and assembling precision to make sure that they can be flexible and proceed uniform displacement.
Strong adaptability. Each junction adopts the structure which can both slide and be rotatably to content the demand of various kinds of bridges.
Save steel. In every displacement control cabinet, all the middle beams are supporting one cross beam which is benefit to large-displacement bridges. This structure can reduces the quantity of beams, the volume of control cabinet and saves steel.
Application

Modular expansion joints for longitudinal movements of 80 mm to 1,200 mm can be widely applied on the bridges which are slope, wide, curved and skew. They are used in highway bridge decks, bridgehead and other places to prevent bridges from appearing cracks cause by climate change. It also can be used in expressway.

Three workers are setting the modular expansion joints in the large-span bridge.
MEJ-3: The large-span bridge is being built with modular expansion joints

This is a large-span bridge that has been constructed with modular expansion joints.
MEJ-4: A large-span bridge that has completed with modular expansion joints

Four workers are building the bridge with modular expansion joints.
MEJ-5: Modular expansion joints are being installed in bridge

This is a bridge that has been built with modular expansion joints.
MEJ-6: A bridge that has completed with modular expansion joints

A crane is setting the modular expansion joints in expressway.
MEJ-7: A expressway is being built with modular expansion joints

This is expressway that has constructed with modular expansion joints.
MEJ-8: The modular expansion joints in a completed expressway