1. Project introduction and features

A bridge is a large bridge from yuyao ancient road head to Zhashan road in jiangbei, the main form of cable-stayed bridge. The superstructure of the main bridge adopts π beam structure. The main 0

2 days after casting, when the mold was removed, it was found that there were two transverse beams at the center line of the pier top. There were multiple cracks on the surface, some of which were wide and had been connected up and down. Such as

As shown below:

The treatment of this structure has been studied by many experts and discussed by many experts. Finally, it is decided to dismantle this beam. The following construction scheme is made for the demolition of this structure to minimize the demolition

In addition to the adverse effects on other bridge structures during construction, it can meet the requirements of bridge safety and stability.

For the vibration and construction period of the transverse beam demolition, if the traditional pick demolition, the vibration is larger and the construction period is longer; With blasting operation, it can not be solved

Protection of the original structure, vibration and construction safety issues. After extensive investigation and comprehensive consideration, it is proposed to use one of the non-destructive cutting technology in the line cutting technology hilide drill

The stone cutting system shall be operated and constructed, and the demolition task shall be completed on the premise of no damage to other structures and no influence on the construction of other working surfaces. Lossless cutting techniques are made use of lines

Saws and other cutting equipment, to separate the reinforced concrete structure for cutting separation, is the most advanced separation technology. After the cutting removal is completed, the old and new concrete is connected

Contact surface can be used to chisel the contact surface, coating brush interface agent and planting ribs and other methods to ensure that the structure of the overall use of good function.

2. Advantages of wire cutting technology:

Concrete wire cutting technology has the characteristics of light, high efficiency, no vibration, low noise, can adapt to a variety of different environments of cutting construction, flexibility, suitable for not

Regular shaped objects, large area and large volume objects, underwater cutting, etc. It not only reduces labor intensity, safe and reliable operation, but also has overload protection function.

Strong power, improve the cutting ability and labor productivity.

In short, the cutting shape of this example project is large, the construction space is small, and the construction is difficult. Can give full play to the advantages of concrete wire cutting technology.

(1) Construction period advantage: because the wire cutting technology uses smaller machinery, can make full use of the site, according to the project construction task, increase the number of machinery, improve the construction speed

. If the hoisting equipment is powerful, it can increase the volume of the single block structure, which is very flexible.

(2) Quality advantage: according to the actual construction requirements, can be cut into any size of small pieces, cutting size is correct. Especially for the other structures that are connected together

There's no structural damage whatsoever.

(3) Safety advantages: safe production without pollution, concrete is cut into blocks like tofu, and then lifted away.

Two, cutting equipment introduction

Hilide hydraulic rope saw cutting system