Steel sheet pile quantities and pricing calibers: driving/extraction by design pile-length mass (t); where area applies; usage fees and guide-frame install/removal across norm systems

Topic Positioning

Compiles the provisions of the main domestic norm systems (municipal, building, railway, highway, plus international rules) on steel sheet pile quantities and pricing: what unit for driving/extraction (retaining), where area applies, how usage (rental) fees are charged, and how guide frames and internal struts are measured — for fixing takeoff and pricing calibers in budgeting and settlement review.

Core Conclusions

1. Driving/extraction (retaining): by design pile-length mass in t (primary caliber)

Formula: pile mass (t) = count x single effective design length (m) x theoretical mass (kg/m) / 1000. Length = design effective length, not actual penetration.

• Shenzhen SJG 84-2020 (municipal maintenance Vol. 2): "Sheet piles per the drawings or approved method statement, by design penetration depth and section, in tons. Pile mass means the design effective length — the wall face plus the embedded length below trench bottom."
• Shenzhen SJG 111.1-2022 (utility tunnel Vol. 1): "Driven and extracted sheet piles by design pile length (embedded part) mass in t."
• Railway TB/T 10823-2024 Vol. 2 volume notes: "sheet-pile retaining quantities by design sheet-pile mass" — driving QY-49/50, extracting QY-51/52 in t; TB/T 10831-2024 Vol. 10 FY-217~232 (by length <=6/10/15/20m, soil class I/II) also in t.
• Highway JTG/T 3832-2018: "driven sheet piles by the design-required sheet-pile mass."
• Shaanxi new draft (2024): "driving/extraction by design pile mass."
• Beijing DB11/T 2382-2024 Annex D Table D.1.14: temporary drive/extract (D1-3-24 channel), permanent (D1-3-26 channel), all in t. Companion rules (check item notes before applying):
• Non-interlocking section piles (channel, I, H, pipe — sparse driving) or simple non-vibratory methods: sheet-pile items with machinery x 0.77, else unchanged (SJG 84-2020 7.1.18; SJG 111.1-2022 same). Railway: channel/rail driving-extraction per Larsen items, machinery x 0.77.
• Small-quantity factor: <= 50t per unit works -> labor and machinery x 1.25 (SJG 84-2020, SJG 111.1-2022).
• Piles broken or bent in driving requiring extraction and re-driving per code are not counted twice (SJG 84-2020 7.1.18).
• Highway: extracting via the driving work platform — no separate platform costs; clips, cut-offs, joints, and straightening are amortized in the norm; sheet-pile timber supports included (making/trial-assembly/install in driving, removal in extraction); anti-rust not included — price separately if required (JTG/T 3832-2018).

2. Usage fee (rental): quantity (t) x duration x unit time price — three time calibers

• Ton-day: SJG 84-2020 — "sheet-pile usage fee by driving quantity x actual days, in ton-days"; internal-strut usage similarly by strut/waler install quantity x actual days.
• Ton-month: SJG 111.1-2022 — "usage by driving quantity x monthly rental, ton-months."
• Per quarter: TB/T 10823-2024 — "the driving items and sheet-pile retaining are compiled for drive/extract plus each quarter of use; usage fee per the method-statement duration, any part of a quarter counts as one quarter; where the statement decides not to extract, price as one-time amortization." Item QY-56 "sheet pile, each quarter of use" in t; TB/T 10831-2024 FY-233 "sheet pile quarterly usage fee" the same.
• Material vs usage: SJG 111.1-2022 driving items exclude the pile material (usage fee); material per market rental; derusting/anti-corrosion/painting included in the usage fee. SJG 84-2020: piles as finished products, unit price incl. body, derusting, painting, anti-corrosion, and mobilization; amortized over 15 uses (adjustable), waste 5%.
• Cap rule (SJG 84-2020): when the unit price of the usage-fee items reaches the prevailing price of the pile or corresponding section steel, stop charging.
• Railway conversion reference: cofferdam struts at 870kg per 10 m2 of enclosed single-layer area (channel 464kg, pipe 246kg, plate 160kg) (TB/T 10823-2024).

3. Where "area" applies (domestic takeoff does not use area)

1. Area-to-mass conversion: retaining area (m2) = wall centerline length x pile length; mass = area x mass per meter of wall face. Use product tables (e.g., SJG 05-2020 Annex D Table D.0.3 for domestic hot-rolled U piles); distinguish "single-pile kg/m" from "wall-face kg/m2" — use the latter.
2. Cofferdam strut conversion: per the railway 870kg/10 m2 (single layer).
3. International rules (foreign/HK-funded): RICS NRM measures sheet piling by area — "C5 The area measured for steel sheet piling is the total surface area of specified sheet pile length" (m2).

4. Guide frames and internal struts

• Guide-frame install/removal: per design horizontal length in linear meters. SJG 84-2020: "longitudinal positioning guide frames per design length in m." SJG 111.1-2022: same. Shaanxi draft: same. Railway TB/T 10831-2024 FY-234 per 100m.
• Internal struts: SJG 84-2020 — strut/waler install/removal by steel-strut mass in t per design dimensions; usage by install quantity x actual days in ton-days. Railway TB/T 10823-2024 — driving/extraction items exclude inter-pile struts; where occurring, per Vol. 2 Chapter 8 steel-strut items; strut items QY-53/54 per "single-layer 10 m2".
• Amortization reference: TB/T 10821-2024 metal amortization — guide-frame rails/rings for sheet-pile driving 5 uses; cut/drilled I-beams and channels 6; cut/drilled angles and plates 3.

Applicable Boundaries

• These are norm (consumption/budget) pricing calibers; under BOQ pricing follow the measurement standard's characteristics and units — do not mix.
• "Design/effective length" per drawings or the approved statement — retaining face plus embedment, not actual penetration; construction waste beyond design is not measured.
• Usage-fee time calibers (ton-day/ton-month/quarter) are system-specific — no cross-use; railway: part quarter = one quarter, no-extraction = one-time amortization; Shenzhen: 15-use amortization (adjustable).
• Area measurement applies only to the three cases and international-rule projects; domestic driving quantities are uniformly in t — no area conversion.
• Coefficients (<=50t x 1.25; non-interlocking x 0.77) and amortization counts differ locally — follow the current local norm and contract.

Further Reading

• SJG 84-2020, 7.1.18, 7.2.11.
• SJG 111.1-2022, 2.1.9, 2.2.9-2.2.11.
• SJG 05-2020 Annex D Table D.0.3.
• TB/T 10823-2024 Vol. 2 volume notes item 9, Chapter 1 Section 2 (QY-49~56); TB/T 10831-2024 Vol. 10 Chapter 1 Section 2 (FY-217~234); TB/T 10821-2024 Chapter 9 Section 4.
• JTG/T 3832-2018 piling notes.
• DB11/T 2382-2024 Annex D Table D.1.14 (D1-3-24~29).
• Shaanxi new draft (2024) pile and foundation rules.
• RICS New Rules of Measurement, C5.