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BS EN 12699:2015 – TC:2020 Edition

$280.87

Tracked Changes. Execution of special geotechnical works. Displacement piles

Published By Publication Date Number of Pages
BSI 2020 175
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1.1 This European Standard establishes general principles for the execution of displacement piles, that means piles which are installed in the ground without excavation or removal of material from the ground except for limiting heave and/or limiting vibration as well as removal of obstructions or to assist penetration. Piles are driven into the ground using impact, vibration, pressing, screwing or a combination of these methods. 1.2 The material of displacement piles covered by this European Standard can be: – steel; – cast iron; – concrete, mortar; – timber; – grout; – combination of above. 1.3 This European Standard covers prefabricated, cast in situ, or a combination of these methods to form displacement piles of regular shape. Examples are given in Figure A.2 and Figure A.3. 1.4 Displacement piles may be installed in soils enhanced by ground improvement techniques. The ground improvement can be executed before, at the same time or after installation of the piles. 1.5 Other than practical considerations there are for the purpose of this European Standard no limitations regarding cross section dimensions, shaft or base enlargements, length or rake. 1.6 The provisions of this European Standard apply to: – single piles; – pile groups; – concrete sheet piles. 1.7 Columns constructed by ground improvement techniques (such as mixed in situ columns, jet grouting, compaction grouting, vibro flotation, stone columns) are not covered by this European Standard. Bored piles are covered in EN 1536. Steel and timber sheet pile walls are covered in EN 12063. Micropiles are covered in EN 14199.

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PDF Pages PDF Title
3 Cross-references
Compliance with a British Standard does not of itselfcannot confer immunity from legal obligations.
Summary of pages
4 Amendments issued since publication
5 Execution of special geotechnical workworks – Displacement piles
8 Foreword
9 1 Scope
10 2 Normative references
12 3 Terms and definitions
3.1
3.1
3.2
3.2
3.3
3.3
3.4
pile made up of two or more types or sizes of piles joined together. The connection between the components is designed to transmit load and to prevent separation during and after construction. (= composite pile) See Figure A.8 of annex A
13 3.4
Note 1 to entry: The connection between the components is designed to transmit axial load and bending and to prevent separation during and after construction. See Figure A.8.
3.5
3.5
3.6
3.6
3.7
3.7
3.8
14 3.8
3.9
3.9
3.10
3.10
3.11
3.11
3.12
15 3.12
3.13
3.13
3.14
3.14
3.15
3.15
3.16
3.16
3.17
16 3.17
3.18
3.18
3.19
3.19
3.20
3.20
3.21
17 3.21
3.22
3.22
3.23
3.23
3.24
3.24
3.25
3.25
3.26
18 3.26
3.27
3.27
3.28
3.28
3.29
3.29
3.30
3.30
3.31
19 3.32
redrive (2)
3.32
3.33
3.33
3.34
3.34
3.35
3.35
3.36
3.36
20 3.37
3.37
3.38
3.38
3.39
3.39
3.40
3.40
3.41
3.41
3.42
3.42
21 3.43
3.43
3.44
3.44
3.45
3.45
3.46
sonic coring
3.46
3.47
working level
3.47
22 3.48
casting level
3.48
3.49
cut off level
3.49
3.50
3.50
3.51
pile top
3.51
3.52
pile head
3.52
3.53
pile shaft
23 3.53
3.54
3.54
3.55
3.55
3.56
3.56
3.57
3.57
3.58
3.58
24 3.59
second choice
3.59
3.60
3.60
3.61
3.61
3.62
3.63
3.65
3.66
25 3.67
3.68
4 Information needed
26 4 Information needed for the execution of the work
4.1 General
27 4.2 Special features
28 5 Site investigation
5 Geotechnical investigation
5.1 General
29 5.2 Specific requirements
30 6 Materials and products
6.1 General
6.2 Prefabricated displacement piles
6.2.1 Concrete piles
6.2.2 Steel Piles
6.2.3 Timber piles
31 6.2.4 Cast Iron piles
6.5.2 Paints, coatings and other means of corrosion protection, or preservation products for piles, shall comply with the specifications in the design and be applied in accordance with the manufacturers instruction.
6 Materials and products
6.1 General
6.2 Prefabricated displacement piles
6.2.1 Concrete piles
6.2.2 Steel piles
32 6.2.3 Cast iron piles
6.2.4 Timber piles
6.3.1 Mortar and concrete
6.3.1.2 Aggregates
6.3.1.3 Cement contents
33 6.3.1.4 Water
6.3.1.5 Water/cement ratio
6.3.1.6 Admixtures
6.3.1.7 Fresh concrete
6.3.1.8 Production of concrete
6.3.1.9 Sampling and testing on site
34 6.3.2 Grout
6.3.3 Reinforcement
35 6.4 Coatings and corrosion protection compounds
7 Design related considerations
36 7.4 Sequence of installation
7.5 Protection of piles
37 7.6 Needs for driving assistance
7.7 Design for impact driving of prefabricated elements
7.7.1 General
38 7.7.2 Prefabricated concrete piles
7.7.3 Steel piles
7.7.4 Timber piles
7.8 Specific design related considerations
7.8.1 General
40 7.8.3 Pile shoe
7.8.4 Pile joint
7.8.5 Pile enlargement
7.8.6 Spacing of piles
41 7.8.7 Combined piles
7 Considerations related to design
7.1 General
7.2 Geometrical construction tolerances
7.3 Sequence of installation
42 7.4 Protection of piles
7.5 Needs for driving assistance
7.6 Design for impact driving of prefabricated piles
7.6.1 General
43 7.6.2 Prefabricated concrete piles
7.6.3 Steel piles
7.6.4 Timber piles
44 7.7 Specific design related considerations
7.7.1 General
45 Table 1
46 7.7.3 Pile shoe
7.7.4 Pile joint
7.7.5 Pile enlargement
7.7.6 Spacing of piles
47 7.7.7 Combined piles
7.7.8 Screw piles
8 Execution
8.1 General
8.2 Construction tolerances
48 8.28.3 Site preparation
8.4 Sequence of installation
8.38.5 Equipment and Methods
8.3.18.5.1 General
8.3.28.5.2 Impact hammer
8.3.38.5.3 Vibrating hammer
50 8.3.48.5.4 Equipment for screw piles
8.3.58.5.5 Equipment for jacked piles
8.3.68.5.6 Auxiliary equipment
8.3.78.5.7 Drive tube
8.48.6 Prefabricated piles
8.4.18.6.1 General
8.4.28.6.2 Prefabricated concrete piles
52 8.4.38.6.3 Steel piles
Table 2 — Guidance on welding, testing and inspection, minimum criteria for piles and pile details in structural steels
54 Table 1 — Welding testing and inspection c riteria for piles and pile details in structural steels
8.4.48.6.4 Timber piles
55 8.4.58.6.5 Combined piles
8.5.18.7.1 General
56 8.5.28.7.2 Temporary cased piles
57 8.5.2.58.7.2.5 Concreting
58 8.5.38.7.3 Permanently cased piles
59 8.68.8 Grouted displacement piles
8.6.18.8.1 Grouting during driving
8.6.28.8.2 Grouting after driving
8.78.9 Trimming of concrete piles
8.8 Additional methods for special cases
8.10 Driving assistance methods
8.8.1 Driving assistance methods
60 8.8.28.11 Ground movement limiting methods
8.8.3 Working from floating platform
61 9 Supervision, monitoring and testing
9.1 Supervision
62 9.2 Monitoring of pile construction
64 9.3 Pile testing
9.3.1 General
Table 3 — Application of some test procedures
9.3.59.3.2 Pile load tests
65 9.3.3 Integrity tests
10 Records
66 10 Records
Table 24
67 Table 35
68 11 Specific requirements
11 Special requirements
11.2 Safety
69 11.3 Noise and vibration hindrance
11.4 Environmental damage (pollution)
11.4.3
70 11.5 Impact on the surrounding structures and slopes
71 Annex A
(informative)
101 Bibliography
105 Contents Page
107 Foreword
108 1 Scope
2 Normative references
110 3 Terms and definitions
119 4 Information needed for the execution of the work
4.1 General
120 4.2 Special features
121 5 Geotechnical investigation
5.1 General
5.2 Specific requirements
122 6 Materials and products
6.1 General
6.2 Prefabricated displacement piles
6.2.1 Concrete piles
6.2.2 Steel piles
123 6.2.3 Cast iron piles
6.2.4 Timber piles
6.3 Cast in situ displacement piles
6.3.1 Mortar and concrete
6.3.1.1 General
6.3.1.2 Aggregates
124 6.3.1.3 Cement contents
6.3.1.4 Water
6.3.1.5 Water/cement ratio
6.3.1.6 Admixtures
6.3.1.7 Fresh concrete
6.3.1.8 Production of concrete
6.3.1.9 Sampling and testing on site
125 6.3.2 Grout
6.3.3 Reinforcement
126 6.4 Coatings and corrosion protection compounds
7 Considerations related to design
7.1 General
7.2 Geometrical construction tolerances
7.3 Sequence of installation
127 7.4 Protection of piles
7.5 Needs for driving assistance
7.6 Design for impact driving of prefabricated piles
7.6.1 General
128 7.6.2 Prefabricated concrete piles
7.6.3 Steel piles
7.6.4 Timber piles
129 7.7 Specific design related considerations
7.7.1 General
7.7.2 Reinforcement of cast in situ piles
130 Table 1
131 7.7.3 Pile shoe
7.7.4 Pile joint
7.7.5 Pile enlargement
7.7.6 Spacing of piles
132 7.7.7 Combined piles
7.7.8 Screw piles
8 Execution
8.1 General
8.2 Construction tolerances
133 8.3 Site preparation
8.4 Sequence of installation
8.5 Equipment and Methods
8.5.1 General
8.5.2 Impact hammer
8.5.3 Vibrating hammer
134 8.5.4 Equipment for screw piles
8.5.5 Equipment for jacked piles
8.5.6 Auxiliary equipment
8.5.7 Drive tube
8.6 Prefabricated piles
8.6.1 General
8.6.2 Prefabricated concrete piles
135 8.6.3 Steel piles
Table 2 — Guidance on welding, testing and inspection, minimum criteria for piles and pile details in structural steels
136 8.6.4 Timber piles
8.6.5 Combined piles
8.7 Cast in situ piles
8.7.1 General
137 Figure 1 — Minimum distance between fresh piles (centre to centre) without permanent casing in soft soil
8.7.2 Temporary cased piles
139 8.7.3 Permanently cased piles
8.8 Grouted piles
8.8.1 Grouting during driving
140 8.8.2 Grouting after driving
8.9 Trimming of concrete piles
8.10 Driving assistance methods
141 8.11 Ground movement limiting methods
8.12 Cast in situ base enlargements
9 Supervision, monitoring and testing
9.1 Supervision
142 9.2 Monitoring of pile construction
143 9.3 Pile testing
9.3.1 General
Table 3 — Application of some test procedures
144 9.3.2 Pile load tests
9.3.3 Integrity tests
10 Records
145 Table 4
146 Table 5
147 11 Special requirements
149 Annex A (informative) Classification and examples
Figure A.1 — Family tree chart for displacement piles
150 Figure A.2 — Examples of shafts and bases of displacement piles
151 Figure A.3 — Examples of cross sections for displacement piles
152 Figure A.4 — Examples for toe protection for prefabricated displacement piles
153 Figure A.5 — Examples of construction of cast in place displacement piles
154 Figure A.6 — Example of piling rig with impact hammer
155 Figure A.7 — Example of mechanical joint for prefabricated concrete displacement piles
156 Figure A.8 — Example of combined pile
157 Figure A.9 — Examples of joint in squared timber pile
Figure A.10 — Example of tool for screw pile
161 Figure A.11
162 Figure A.12 — Example of post grouted pile
163 Figure A.13 — Displacement piles, terms and levels
164 Annex B (informative) Guidance on minimum cover (in mm) for bearing element of low strength steel for cast in situ displacement piles
Table B.1
165 Annex C (informative) Degree of obligation of the provisions
172 Bibliography
BS EN 12699:2015 - TC
$280.87