Kindergarten house appraisal , Seismic detection of buildings Factory building safety inspection and building safety appraisal

As a third-party building inspection, reinforcement and consulting, Nanjing Nantah engineering inspection mainly provides inspection, reinforcement and consulting services for residential buildings, shopping malls, warehouses, garages, hotels, hotels, schools, workshops, workshops and other buildings

Business scope of the company:

1、 Scope of housing construction engineering inspection services:

1. Nature: existing buildings, projects under construction, uncompleted residential buildings, etc

2. Functions: Civil and industrial buildings; Ancient architecture, etc

3. Structure: frame structure, frame shear wall structure, brick concrete structure, brick wood structure, mixed structure, bent structure, steel structure, barrel structure, stone masonry structure and long-span space structure

4. Floors: low rise buildings, multi-storey buildings, medium and high-rise buildings, high-rise buildings and super high-rise buildings

2、 Service items:

1. Safety (reliability) test

(1) recheck and test when there are doubts about the quality, structural safety, component durability and usability of the main project of the house

a. Structural safety: including uneven settlement, sliding and deformation of foundation; Cracking, deformation, damage, weathering, carbonization and corrosion of the upper bearing structure; The enclosure system has deformation, cracking and damage caused by uneven settlement of foundation and insufficient bearing capacity of load-bearing components

b. Quality of main works: including concrete strength, floor thickness, reinforcement layout, section size, structural layout, reinforcement strength, internal defects of concrete components, brick masonry strength, masonry mortar strength and construction technology of concrete structure and brick concrete structure; Steel performance, construction technology, section size, structural layout, bolt joint strength, weld quality, coating thickness, etc. of steel structure engineering

(2) change the use of the house, dismantle and modify the structural layout, increase the service load, extend the design service life, increase the number of service floors, conduct performance test before decoration and installation of advertising screen or acceptance test after decoration and reinforcement

2. Safety inspection of houses around the construction site

It includes the inspection of houses around the construction of real estate, civil engineering, tunnel, foundation pit, subway, bridge, river leveling and other projects. Before construction, it mainly carries out evidence preservation and safety inspection and evaluation of the current situation of the surrounding houses (within the specification). After construction, it carries out inspection and evaluation of the damage cause and degree of the houses, and provides reasonable reinforcement treatment suggestions for the damage

3. Structure detection

(1) detection of structures (including chimney, water tower, cooling tower, corridor, etc.)

(2) bridge and highway inspection

(3) post disaster (fire, earthquake, etc.) structure detection

(4) inspection and evaluation of nuclear power containment structure and large structure

(5) earthquake resistance of buildings (structures) and industrial equipment

(6) inspection of ancient buildings

The business scope of construction engineering structure inspection mainly includes:

  1) On site detection of concrete structure strength (ultrasonic rebound comprehensive method, rebound method, core drilling method, etc.)

  2) On site masonry mortar strength test (penetration method, rebound method, etc.)

  3) On site masonry strength test (in-situ axial compression method)

  4) Thickness detection of reinforcement protective layer (NDT)

  5) Static load test on structural performance of concrete members (deflection, crack resistance, bearing capacity and crack width)

  6) Detection of uplift bearing capacity of concrete post anchorage

  7) Structural deformation detection (inclination, crack, etc.)

  8) Concrete appearance quality and defect detection (ultrasonic detection)

  9) Deformation and defect detection of masonry structure (crack, weathering, peeling and verticality)

  10) Structural dynamic test

  11) Chloride ion content detection

  12) Electrochemical detection of reinforcement corrosion

  Indoor ambient air pollutants detection contents include:

1. Detection of benzene content in indoor air

2. Detection of ammonia content in indoor air

3. Detection of formaldehyde content in indoor air

4. Indoor air TVOC content detection

5. Detection of radon content in indoor air

The business scope of steel structure inspection of construction projects mainly includes:

  1) Physical properties of steel structure materials (yield strength, tensile strength, elongation, bending, impact toughness and hardness)

  2) Real load test of steel structure member performance

  3) Ultrasonic testing of steel structure welds

  4) Steel structure anti-corrosion and fireproof coating inspection (anti-corrosion and fireproof coating thickness inspection)

  5) Connection performance test of steel structure (anti slip coefficient test of friction surface, torque coefficient and pretension test of high-strength bolt connection pair, field test of final tightening torque during construction)

  6) Steel structure deformation detection