【法规名称】
【法规编号】 79807 什么是编号？
【正 文】
第12页 CAP 123B BUILDING (CONSTRUCTION) REGULATIONS
|
[接上页] (4) No adjustment shall be made to the measured strength in respect of the age of the core when tested. (Enacted 1990) Cap 123B reg 64 Interpretation PART XIII RETAINING WALLS In this Part- "retaining wall" (挡土墙) means a structure retaining earth or fill. (Enacted 1990) Cap 123B reg 65 General requirement (1) Retaining walls shall be designed and constructed to support safely the earth or fill they retain and other loads without impairing the stability of, or causing damage to, any other building, structure, land, street or services. (2) The design and construction of minor retaining walls shall comply with subregulation (1) but shall be exempted from regulations 66 to 84. (Enacted 1990) Cap 123B reg 66 Filters Materials Any filter used in a retaining wall shall when placed against soil be such as to allow water to flow through it while restraining the migration of particles from the soil. (Enacted 1990) Cap 123B reg 67 Backfill material Backfill placed adjacent to retaining walls shall consist of material capable of being compacted to form a stable fill. (Enacted 1990) Cap 123B reg 68 Earth pressure Loads Pressure from earth or fill shall be determined from soil mechanics theory with due consideration of the acceptable deformations of the surroundings. (Enacted 1990) Cap 123B reg 69 Water pressure Water pressure shall be determined- (a) from an assessment of geological conditions, ground water and surface water conditions, services and other relevant matters, due account being taken of any drainage measures provided; or (b) by any other suitable method. (Enacted 1990) Cap 123B reg 70 Minimum pressure The design pressure for a retaining wall shall be not less than the pressure due to an equivalent fluid of unit weight 5 kN per cubic metre. (Enacted 1990) Cap 123B reg 71 Retaining wall design Design Retaining walls shall be designed in accordance with engineering principles. (Enacted 1990) Cap 123B reg 72 Loading condition The design of a retaining wall shall take due account of the most onerous loading conditions whether during the construction or the service life of the wall. (Enacted 1990) Cap 123B reg 73 Site investigation The design of a retaining wall shall be based on data from an appropriate site investigation. (Enacted 1990) Cap 123B reg 74 Adequate factor of safety Retaining walls shall be designed to provide adequate factors of safety against sliding, overturning and ultimate bearing failure and against failure on a surface passing beneath the retaining wall. (Enacted 1990) Cap 123B reg 75 Validity of design earth pressure Compatibility shall be ensured between the designed earth pressure and the deformation of the retaining wall. (Enacted 1990) Cap 123B reg 76 Masonry and mass concrete walls Retaining walls constructed of unreinforced masonry or mass concrete shall be so designed that tension does not develop in the wall or at the foundation. (Enacted 1990) Cap 123B reg 77 Drainage measures to preserve stability Where it is likely that construction of a retaining wall will cause a rise in ground water level such that the stability of any building, structure, land, street or services are likely to be impaired, preventive drainage measures shall be installed. (Enacted 1990) Cap 123B reg 78 Performance of drainage system Where a drainage system is provided to reduce any water pressure that may be imposed on the retaining wall, such drainage system shall be designed and constructed so as not to be rendered ineffective during service by the penetration of soil or by any other cause. (Enacted 1990) Cap 123B reg 79 Surface channels Adequate channels laid to suitable gradients, or paving laid in accordance with regulation 33 shall be formed at the top and in front of every retaining wall to carry away any seepage or surface water. (Enacted 1990) Cap 123B reg 80 Safety required during excavation and construction The design of retaining walls at all stages of construction and excavation shall provide adequate factors of safety against piping and bottom heave and have an adequate margin of safety for the stability of the toe of the retaining wall. (Enacted 1990) Cap 123B reg 81 Weep holes Further requirements for masonry retaining walls (1) Adequate weep holes shall be Provided through the face of every masonry retaining wall other than a retaining wall which is subject to regulation 48 of the Building (Planning) Regulations (Cap 123 sub. leg.). (2) A layer of drainage and filter material at least 300 mm thick shall be provided at the back of every masonry retaining wall. (Enacted 1990) Cap 123B reg 82 Copings Retaining walls constructed of masonry shall be provided with a proper coping of concrete or other suitable material. (Enacted 1990) Cap 123B reg 83 Bonding and foundation required Retaining walls constructed of masonry shall be bonded and solidly put together with mortar and provided with a foundation of concrete on solid undisturbed ground or on piles. |
- 此法规有错误，我来纠正。请点击在此 提交错误内容或者您纠正的内容！