With epoxy grout method foundation base area

Epoxy grout increase base area method is suitable for the foundation bearing capacity of existing buildings and did not meet the requirements of specification size of bottom of foundation reinforcement. Can be used epoxy grout set or reinforced concrete foundation base area. Increase the design and construction of the foundation base area shall meet the following requirements: ( A) When foundation eccentric loading, can use asymmetric widened; When the tolerance center load, can adopt symmetrical widened. ( 2) In order to improve the reinforcement effect. Measures should be taken to or cut new stress-strain hysteresis between the part and the original basis. Every 1 for strip foundation. 5 - 2 m spacing uninstall short beams, the original foundation by jack will load in a certain proportion to edge on the reinforced concrete beam; For independent foundation, may through the steel brace, the original foundation with steel plates are part of the load transfer to the reinforced concrete ring beam. ( 3) In front of the perfusion high-strength non-shrinkage epoxy grout should be the original foundation cut hair, Depth of the concave and convex around 5 mm) And scrub clean, apply a layer of concrete interface agent, in order to enhance the cohesive force of old and new concrete. ( 4) The widened section, the foundation should be laid on the thickness and material are the same as the original foundation of cushion layer. The foundation soil should be the current national standard specifications for design of building foundation GB50007 tamper force linear meter of the relevant provisions. ( 5) Based on each side when using concrete set of widening the width of its overall dimensions should be consistent with existing national standard specifications for design of building foundation GB50007 in regulations on rigid foundation and order the aspect ratio value. Basic every 900 mm high, with the method of chemically-planted steel bars set anchorage shear short muscle ( 6) When it adopts reinforced concrete reinforcement, widen the part with the original foundation generally adopts the hinge, using steel can. ( 7) For strip foundation widening should be according to the length of 1. 5 - 2. 0 m divided into separate sections, partial. Fragmentation. Intervals of construction. www。 adssrrt。 com