Caisson

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Import
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Project
Client
Ground Model Data
Select Mode
Geometry Data
Soil Data
Load Data - Support
Anchor Foundation
Load Data - Anchor
Output

Documentation

Input: Import

Calculate

Caisson Input

Input

Import

Import from File(s)

Drop files here or

Max. file size: 256 MB, Max. files: 1.

1. Project Identification Data

Report Name:

Author Name:

Author Title:

Author Phone:

Author Email:

Project

Project Name

Project Reference

Date

MM slash DD slash YYYY

Project Location

Project Description

Client

Client Company:

Client Name:

Client Phone:

Client Email:

2. Ground Model Data

Resistance Factor

Number format 9.99

Load Soil Data Matrix

Load Value Matrix

Import Value Matrix

Number of Soil Layers

Max 200

Import Soil Layer Data (xls, csv)

Drop files here or

Max. file size: 10 MB, Max. files: 1.

Download Template (link)

Soil Layer Data Matrix

Layer #

Top Depth Below Sea Floor [m]

Submerged Unit Weight [kN/m3]

Top Undrained Shear Strenght [kPa]

Bottom is Shear Strength [kPa]

Max 200 – Z_BOT must exceed 1.5 caisson embedment length L. Reasons include (a) caisson converged solution length can exceed guess length L and (b) averaging su below caisson tip level.

3. Select Mode: Solution Data

Select VHM Model

3.2 Select: Problem Solution Mode Pointer

Mode 10 – Find: LOpt – For Caisson: D – Load: VHM – Foundation: Support Foundation

Mode 11 – LOpt , Fix, MOpt , Fix, D VH- Support Foundation + Fixed Head

Mode 12 – FOSMH D , L -HM Support Foundation

Mode 13 – FOSVHM D , L VHM Support Foundation

Mode 14 – FOSHmax D , L -H- Support Foundation + Fixed Head

Mode 15 – FOSVHmax D , L VH- Support Foundation + Fixed Head

Mode 16 – VH Envelope D , L ex Support Foundation + DNV, 1992

Mode 17 – VM Envelope D , L ez Support Foundation + FEB, 2013

Mode 20 – LOpt , Fix, ZOpt , Fix, D Z, TZ, θZ Anchor Foundation + Chain Profile

Mode 21 – LOpt , Fix, ZOpt , Fix, D Tlug, θlug Anchor Foundation

Mode 22 – TLug D , L , Zlug θlug Anchor Foundation + Chain Profile

Mode 23 – FOSTlug D , L , Zlug Z, TZ, θZ Anchor Foundation + Chain Profile

4. Caisson Geometry Data

4.1 # Different Caisson Geometries

(d, L etc.) [NCGEOM]

4.2 Caisson Geometry

4.3 Caisson Wall Thickness Diameter Ratio [WT_D_SIDE]

4.3 Caisson Top Plate Thickness Diameter Ratio [WT_D_TOP]

4.3 Number of Full Height Cross-PLates With Caisson [NFHX]

4.4 Caisson Offset Pointer

4.4 User Defined Offset [NCGEOM]

4.4 Caisson Lug Radial Offset

4.5 – Mode_VHM 10 – 17

4.5 Load Geometry Data

Load Geometry Data Matrix

Import Geometry Data (xls, csv)

Import Soil Layer Data (xls, csv)

Max. file size: 10 MB.

Download Template (link)

4.5 Caisson Geometry Matrix

Layer #

Caisson Outer Diameter (D)

Caisson Embedded Length (L) (Guess ?L = D)

Layer Type

Max 200

4.5 Caisson Geometry Matrix

Layer #

Caisson Outer Diameter (D)

Caisson Embedded Length (L) (Guess ?L = D)

Layer Type

Max 200

4.6 – Mode_VHM 20 – 23

4.6 Load Geometry Data

Load Geometry Data Matrix

Import Geometry Data (xls, csv)

Import Soil Layer Data (xls, csv)

Max. file size: 10 MB.

Download Template (link)

4.6 Caisson Geometry Matrix

Layer #

Caisson Outer Diameter (D)

Caisson Lug Level Depth (Guess ZLug =2/3 L)

Layer Type

Max 200

5. Steel Soil Interaction Data

5.2 Pointer to Axial Resistance Mode

1. Plugged Mode Vmax

2. Unplugged (Coring) Mode

-2. Unplugged (Coring) Mode

3. Unit Friction Fi Max

-3. Unplugged Unit Friction Unplugged (Coring) Mode

4. User Supplied Value

5. Leaking Mode

5.1 Friction

5.1 Outer Frication Factor On Peak Strength [ALPHA_FO]

5.1 Inner Friction on Peak Strength [ALPHA_FI]

5.1 Outer Skin Friction Reduction Factor [ETA_FO]

5.2 Factor

5.2 REB Factor [ETA_REB]

5.2 User Defined Max / Caisson Axial Resistance [VMAX_USER]

5.2 Undrained Strength SU Averaged from Foundation [ALPHA_D_SU]

5.3 Rotation

5.3 MH Elipse Reduction A [ETA_AMH]

5.3 MH Elipse Resistance Rotation Angle Increase Factor [ETA_PHIMH]

5.3 MH Elipse Reduction B [ETA_BMH]

6. Load Data – Support Foundation

6.1 Number of Load Cases [NLC]

Max 10

Load value for all cases? [NLFAC_LC]

Yes

6.2 Number of Load Factors per Load Cases [NLC]

6.2 Unique Load Factors Per Load Case (mode 10-15)

Layer #

Load Case Name

Load Factor

6.3 Load Data Matrix [LOAD_MAT]

6.3 Mode_VHM = 10 find Lopt for given caisson D and load VHM If selector 6.2 = YES -> Dont show LOAD FACTOR column if using 6.2 shared load factor

Layer #

Load Case Name

V1 Vertical Load at Seafloor

H1 Lateral Load at Seafloor

M1 Moment load at Seafloor

V2 Vertical Load at Seafloor

H2 Lateral Load at Seafloor

M2 Moment load at Seafloor

VHM Load Factor

7. Anchor Foundation

Select: Caisson Weight Buoyant:

0. No Caisson Weight Added

> 0. Add Bw,caisson γL,Bw to factored V load

1. Calculate Bw,caisson from caisson geometry (L,D etc.)

2. Use stickup factor ηVst,wall and extra buoyant weight ΔBw,caisson

3. User-supplied value (Bw,caisson constant) (? = 1)

7.1 Caisson Buoyant Weight Pointer

7.1 Load Factor on Caisson Buoyant Weight [L_FAC_BW]

7.1 Caisson Extra Buoyant Weight [kN] [DELTA_BW_USER // only used ISCOPE_BW = 2]

7.1 Caisson Extra Buoyant Weight User Defined [kN] [BW_USER // only used ISCOPE_BW = 3]

7.1 Caisson Wall and Cross-Plate Steel Volume Multiplier / ? = 1.025 (for cohesive soil plug) [ETA_VST_WALL // only used ISCOPE_BW = 2]

7.2 Anchor Chain Parameters:

7.2 Caisson Tilt Angle From Vertical [DTHETA_LUG_DEG]

7.2 Caisson Twist / Misorientation Angle In Plan [PSI_TWIST_DEG]

7.3 Embedded Chain Profile Mode Pointer

7.3 How to calculate chain profile?

7.3 How to calculate chain profile? 1. Auto-compute chain profile using seafloor Tz0, θ0 2. Input own chain T, θ profile

7.3 Input Own Chain T, θ profile [ISCOPE_ACH = 2]

7.4 Auto-Compute Chain Profile

Chain Model:

[CH_MODEL]

7.4 Anchor Chain Type

0. Include Friction Takeout

1. Zero friction takeout)

7.6 Chain Clay Adhesion Factor

? = 0.7 for Link NC Clay // ? = 0.7 for Wire NC Clay

7.7

chain nominal diameter

Input

Units

7.7

Chain submerged weight per metre length

if = WIRE [m]

Input

Units

7.7

Chain submerged weight per metre length

if = LINK [m]

Input

Units

7.8

EWB chain effective width in bearing factor

(? = 2.5 for CH_TYPE = “link”)

Input

Units

7.8

EWB chain effective width in bearing factor

(? = 1.0 for CH_TYPE = “wire”)

Input

Units

7.8

EWS chain effective width in sliding factor

(? = 11.3 for CH_TYPE = “link”)

Input

Units

7.8

EWS (? = 3.1 (≈π) for CH_TYPE = “wire”)

(? = 11.3 for CH_TYPE = “link”)

Input

Units

7.9 Chain Element Length

No Input

1. Output profile every KOUTNE elements

7.9

Chain Element Length

Input

Units

8. Load Data – Anchor Foundations

Pointer to load factors on chain load [NL_FAC_T]

= 1: input and use T load factor λT

= 2: input and use T load factors λV, λH

= 3: input λV, λH and use T load factor λVH intermediate between λV and λH (API 2SK, 2005 and ISO/DIS 19901- 4, 2014)

8.1 Number of Load Cases [NLC]

List

Layer #

z (m bsf)

Tz (kN)

theta_z (deg)

9. Output

Download the terminal output here

Download the output file here

Output file contents

Terminal output

Output

Download Files

Files

DOWNLOAD: Raw Data
DOWNLOAD: All Files

Caisson Geometry

Generated Table

wdt_ID	Zdep [m]	Bden [kN/m^3]	Su Top [kPa]	Su_Bot [kPa]	Phi [deg]
1	0	9	0	0	30
2	6	7	45	45	37
	Zdep [m]	Bden [kN/m^3]	Su Top [kPa]	Su_Bot [kPa]	Phi [deg]
	∑ = 6	∑ = 16	∑ = 45	∑ = 45	∑ = 67
	Avg = 6.00	Avg = 8.00	Avg = 45.00	Avg = 45.00	Avg = 33.50
	Min = 0	Min = 7	Min = 0	Min = 0	Min = 30
	Max = 6	Max = 9	Max = 45	Max = 45	Max = 37

Resistance Data

Generated Table

wdt_ID	Zdep [m]	Bden [kN/m^3]	Su Top [kPa]	Su_Bot [kPa]	Phi [deg]
1	0	9	0	0	30
2	6	7	45	45	37
	Zdep [m]	Bden [kN/m^3]	Su Top [kPa]	Su_Bot [kPa]	Phi [deg]
	∑ = 6	∑ = 16	∑ = 45	∑ = 45	∑ = 67
	Avg = 6.00	Avg = 8.00	Avg = 45.00	Avg = 45.00	Avg = 33.50
	Min = 0	Min = 7	Min = 0	Min = 0	Min = 30
	Max = 6	Max = 9	Max = 45	Max = 45	Max = 37

Generated Results

Generated Table

wdt_ID	Zdep [m]	Bden [kN/m^3]	Su Top [kPa]	Su_Bot [kPa]	Phi [deg]
1	0	9	0	0	30
2	6	7	45	45	37
	Zdep [m]	Bden [kN/m^3]	Su Top [kPa]	Su_Bot [kPa]	Phi [deg]
	∑ = 6	∑ = 16	∑ = 45	∑ = 45	∑ = 67
	Avg = 6.00	Avg = 8.00	Avg = 45.00	Avg = 45.00	Avg = 33.50
	Min = 0	Min = 7	Min = 0	Min = 0	Min = 30
	Max = 6	Max = 9	Max = 45	Max = 45	Max = 37

Ground Model Data

Generated Table

wdt_ID	Zdep [m]	Bden [kN/m^3]	Su Top [kPa]	Su_Bot [kPa]	Phi [deg]
1	0	9	0	0	30
2	6	7	45	45	37
	Zdep [m]	Bden [kN/m^3]	Su Top [kPa]	Su_Bot [kPa]	Phi [deg]
	∑ = 6	∑ = 16	∑ = 45	∑ = 45	∑ = 67
	Avg = 6.00	Avg = 8.00	Avg = 45.00	Avg = 45.00	Avg = 33.50
	Min = 0	Min = 7	Min = 0	Min = 0	Min = 30
	Max = 6	Max = 9	Max = 45	Max = 45	Max = 37