How much does it cost to inspect the underwater pile foundation of Beijing bridges

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Underwater pile foundation diving inspection price - Bridge underwater structure safety inspection contact phone number

Underwater pile foundation diving detection method and underwater pile foundation construction technology. Underwater bridge detection technology is a new detection technology developed in coastal areas in the past decade. It is a new detection technology developed on the basis of traditional static load testing, dynamic testing, and in-situ testing. Due to its wide application range, strong adaptability, and the ability to avoid or reduce conventional measurement errors and human factors, this technology has broad development prospects and enormous economic potential.

The G208 Yellow River Highway Bridge on the second line has been in operation for 35 years, and the safety issues of the lower part of the bridge cannot be ignored, especially the lower structure of the water crossing bridge, which is more prone to corrosion and damage compared to the structure in conventional environments. The steel bars are corroded and expand, causing concrete cracking or even peeling and damage, affecting the bearing capacity of the bridge. Therefore, it is crucial to detect the terrain and erosion conditions around the bridge piers and foundations.

General testing includes apparent state, crack state, concrete damage, exposed corrosion of steel bars, concrete honeycomb and rough surface, etc. In addition, it also includes the outer dimensions of the structure, the cross-section of the riverbed and topography, as well as the flow velocity and turbidity of the water at the bridge location. When necessary, the development and changes of defects, as well as the deformation of foundations and structures, should be investigated.

Foundation erosion is an important form of damage to underwater bridge piers. Bridge piers and foundations affect the direction of the original water flow, causing rapid changes in the water flow around the foundation, taking away the soil below and around the foundation, and causing erosion and damage. Scouring can change the stress state of the structure and have a significant impact on the safety of bridge use. The erosion forms are divided into two types: general erosion and local erosion. General erosion is usually caused by imbalanced sediment transport or excessive excavation of sediment in the river channel, while local erosion is mainly caused by the construction of hydraulic structures. The bridge pier structure belongs to hydraulic structures, and its foundation erosion belongs to local erosion.

The vast majority of underwater bridge piers are made of reinforced concrete, concrete, and masonry, which are easily damaged due to the direct impact of upper structural loads or foundation defects. Under sudden external loads such as ship collisions or floating object impacts, underwater bridge piers may experience local damage, resulting in material peeling or detachment. They are also susceptible to weather conditions such as dryness, humidity, cold and heat, freezing, and ice melting, as well as the effects of seawater, industrial corrosive water, etc., which can cause diseases. Building materials will also age over time.

Underwater pile foundation diving inspection price - Bridge underwater structure safety inspection contact phone number

To grasp the current status of underwater foundation of bridges and provide guidance for subsequent bridge maintenance and upkeeponeHandwritten materials: The Municipal Highway Development Center strictly adheres to the "Technical Regulations for Underwater Component Testing of Highway Bridges", develops a safe and feasible special testing plan, and conducts underwater special testing on the defects of the bearing platforms and pile foundations of G208 Yellow River Highway Bridge 48 # to 62 # bridges.

On the same day, the appearance inspection of underwater structures, measurement of riverbed cross-sections, foundation scouring and excavation testing were completed. Through the inspection and technical condition assessment of professional technicians, a scientific foundation is provided for the next step of bridge special maintenance, and a solid guarantee is provided for the safe operation of bridges.

The usage conditions and environment of underwater bridge piers are more severe than those of water structures, which can easily cause damage and disease, leading to a decrease in the bearing capacity and durability of the bridge, and in severe cases, endangering the safety and service life of railway operations. Due to the long service life, great changes in the surrounding environment, artificial sand mining and other reasons, especially the impact of rainstorm, flood, floating ice and other impacts, some underwater piers of railway bridges have potential safety hazards to varying degrees.

Improper selection of bridge location, pier structure form, and size during design, as well as failure to design or design of structural adjustment materials, flood control facilities, etc. as required, can have adverse effects on the safety of pier structures. Improper selection of construction raw materials and unreliable quality can lead to a decrease in the durability of bridge piers. The underwater quality is difficult to control during construction, resulting in quality defects that are not easily detected, thereby affecting the use of bridge piers.

Water structures are generally difficult to construct under challenging conditions, and the construction accuracy is also difficult to control. The completed structure may have certain errors compared to the original design. By measuring the external contour dimensions of the structure and comparing them with the original design, we can grasp the actual structural dimensions and usage status of the structure.