Pre-construction survey to MTR tunnel

We mange the construction risk and comply with MTR requirement before sub-structure works commencement.

We carried our pre-construction survey and monitoring proposal to record existing defect and initial record of MTR property including the wall, track rail inside the tunnels.

Underground Pipe Inspection – Tree Roots Issue

Underground drainage inspection can always help you to prevent blockage issues which may cause flooding in the future. Tree roots blockage is one of the common issues which may find easily near the plantation area. Regular inspection is necessary to prevent damage to the underground drainage system.

Here is one example which shows how tree roots can block the stormwater piping system.

 

Maintenance problem from wrong “water to cement ratio” of concrete cover mix

Concrete cover is the outer concrete layer serves to protect the rebar in RC structure. Its thickness and density dictates both the protection performance and fire – resisting ability.  The extract from the research paper by Albert K.H. Kwan in Department of Civil Engineering, University of Hong Kong , the concrete cover will become much permeability to water once the “water to cement ratio” exceeds 0.4. Adversely does the high water to cement ratio happen in many concreting process in Hong Kong. To account the reason behind , it is the slump of the concrete or the workability of the concrete affects the entire concreting process. The drawback from high permeability is very obvious . The concrete cover becomes lesser defensive against the water nor air penetration . The alkaline environment around the rebar is diminished along with the carbonation due from the air pollution

 

 

Regular Drainage Piping Inspection for Building

 

Regular pipe inspection is one of the important preventive maintenance for all buildings. During the coronavirus disease (COVID-19), all residential buildings may experience high usage of water as most of the people have to stay at home for work and daily life. The drainage pipe system may easily get blocked and the aging problem during this period, CCTV inspection can help to monitor the condition of piping system which can find out the potential problems.

The inner coating of the epoxy drainage pipes has been designed to withstand most chemical stress and resist abrasion. Made of an epoxy-resin regularly assessed, this coating benefits from continuous improvement to meet wastewater drainage increasing constraints. Its smooth surface enhances flow capacity and prevents incrustations and deposits. However, the workmanship may affect the piping durability and also create the risk of clogging. Therefore, close monitoring for replacement workmanship is also an important issue to prevent risk.

 

High Ceiling Inspection

GBE found the relax of headroom from PNAP has posed many difficulties to conduct professional inspection to above high ceiling. We made ourselves accessible with our own rising platform and wifi endoscope. Usually the drainage which poses the hygienic alert is hide above. Our way can ease many people pain.