BS EN 1536-2010 专门的岩土工程的实施.管桩

标准号：BS EN 1536-2010
中文标准名称：专门的岩土工程的实施.管桩
英文标准名称：Execution of special geotechnical works. Bored piles
标准类型：P21
发布日期：2010/9/30 12:00:00
实施日期：2010/9/30 12:00:00
中国标准分类号：P21
国际标准分类号：93.020
适用范围：1.1 This European Standard establishes general principles for the execution of bored piles (see 3.2).1.2 This European Standard applies to bored piles (see Figure 3) with:? uniform cross-section (straight shaft);? telescopically changing shaft dimensions;? excavated base enlargements; or? excavated shaft enlargements.1.3 This European Standard applies (see Note) to:? bored piles with a depth to width ratio ≥ 5;? piles (see Figures 1 and 3) with a shaft diameter 0,3 m ≤ D ≤ 3,0 m;? barrettes (see Figure 2) with the least dimension Wi ≥ 0,4 m, a ratio LBiB / Wi between its largest and itsleast dimensions ≤ 6 and a cross-sectional area A ≤ 15 m?;? piles with circular precast elements used as structural member (see Figure 7) with a least dimensionDP ≥ 0,3 m;? barrettes with rectangular precast elements used as structural member with a least dimensionWP ≥ 0,3 m.1.4 This European Standard applies to piles with the following rake (see Figure 4):? n ≥ 4 (Θ ≥ 76°);? n ≥ 3 (Θ ≥ 72°) for permanently cased piles.1.5 This European Standard applies to bored piles with the following dimensions of the shaft or baseenlargements (see Figure 3):a) base enlargements:1) in non-cohesive ground: DB / D ≤ 2;2) in cohesive ground: DB / D ≤ 3;b) shaft enlargements in any ground: DE / D ≤ 2;c) slope of the enlargement in non-cohesive ground m ≥ 3;1) in non-cohesive ground: m ≥ 3;2) in cohesive ground: m ≥ 1,5;d) base enlargements area of barrettes: A ≤ 15 m?;1.6 The provisions of this European Standard apply to:? single bored piles;? bored pile groups (see Figure 5);? walls formed by piles (see Figure 6).1.7 The bored piles which are the subject of this European Standard can be excavated by continuous ordiscontinuous methods using support methods for stabilizing the excavation walls where required.1.8 This European Standard applies only to construction methods that allow the designed cross-sections tobe produced.1.9 The provisions apply to bored piles (see Figure 7) constructed of:? unreinforced (plain) concrete;? reinforced concrete;? concrete reinforced by means of special reinforcement such as steel tubes, steel sections or steel fibres;? precast concrete (including prestressed concrete) elements or steel tubes where the annular gapbetween the element or tube and the ground is filled by concrete, cement or cement-bentonite grout.1.10 Micropiles, mixed-in-place columns, columns constructed by jet grouting, ground improvement for piling,mixed-in-place pile bases and diaphragm walls are not covered by this European Standard.