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Prestressed Concrete Square Piles

Featuring high strength, high rigidity, low water‑cement ratio, low permeability, superior impact resistance and high structural bearing capacity, Prestressed High‑Strength Concrete Square Piles (including YZH and T‑FZ series) are well‑recognized high‑performance foundation components within the construction industry.

They are widely adopted across diverse engineering applications, such as industrial & civil buildings, transportation infrastructures including highways, railways and bridges, coastal projects comprising ports and wharves, airport pavements, water‑conservancy facilities, municipal engineering, as well as foundation works for large‑scale heavy‑duty equipment.

Our company delivers complete professional services covering pre‑project site investigation, customized design, construction supervision and technical consultation, to reliably secure the stability and long‑term durability of your project foundations.

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SPECIFICATIONS

Table of Reinforcement and Mechanical Properties of Prestressed Concrete Square Piles

Pile number	Pile cross-section BxB	Group	Concrete strength grade	Side length of the square containing the rebar tensioning hole B1 (mm)	Side length of the square defined by the centerlines of the additional reinforcement bars (mm)	Pile length L (m)	Prestressed main reinforcement (1)	Supplementary reinforcement (2)		Spiral stirrup (3)	Prestressing reinforcement ratio (%)	Effective pre-compressive stress of the concrete σ_pc (MPa)	Design value of axial compressive bearing capacity N (kN)
Pile number	Pile cross-section BxB	Group	Concrete strength grade			Pile length L (m)	Prestressed main reinforcement (1)	Reinforcement t	Length L (mm)	Spiral stirrup (3)	Prestressing reinforcement ratio (%)	Effective pre-compressive stress of the concrete σ_pc (MPa)	Design value of axial compressive bearing capacity N (kN)
YZH-250 x-x-x x	250×250	A	≥C60	173	150	L≤12	4ΦD10.7	4Φ16	≥2000	Φb3	0.58	4.41	1117
YZH-250 x-x-x x	250×250	B	≥C60	171	148	L≤14	4ΦD12.6	4Φ16	≥2000	Φb3	0.80	6.01	1117
YZH-300 x-x-x x	300×300	A	≥C60	213	192	L≤12	8ΦD9.0	4Φ18	≥2000	Φb4	0.57	4.34	1609
YZH-300 x-x-x x	300×300	B	≥C60	211	190	L≤14	8ΦD10.7	4Φ18	≥2000	Φb4	0.81	6.02	1609
YZH-350 x-x-x x	350×350	A	≥C60	261	240	L≤12	8ΦD10.7	4Φ18	≥2000	Φb4	0.59	4.49	2190
YZH-350 x-x-x x	350×350	B	≥C60	259	238	L≤15	8ΦD12.6	4Φ18	≥2000	Φb4	0.82	6.15	2190
YZH-400 x-x-x x	400×400	A	≥C60	311	290	L≤14	12ΦD10.7	4Φ20	≥2000	Φb4	0.68	5.15	2860
YZH-400 x-x-x x	400×400	B	≥C60	309	288	L≤15	12ΦD12.6	4Φ20	≥2000	Φb4	0.94	6.96	2860
YZH-450 x-x-x x	450×450	A	≥C60	359	338	L≤14	12ΦD10.7	4Φ20	≥2000	Φb5	0.54	4.14	3620
YZH-450 x-x-x x	450×450	B	≥C60	357	336	L≤15	12ΦD12.6	4Φ20	≥2000	Φb5	0.74	5.62	3620
YZH-500 x-x-x x	500×500	A	≥C60	409	388	L≤15	16ΦD10.7	4Φ22	≥2000	Φb5	0.58	4.46	4469
YZH-500 x-x-x x	500×500	B	≥C60	407	386	L≤15	16ΦD12.6	4Φ22	≥2000	Φb5	0.80	6.03	4469
YZH-550 x-x-x x	550×550	A	≥C60	457	436	L≤15	20ΦD10.7	4Φ22	≥2000	Φb6	0.60	4.60	5407
YZH-550 x-x-x x	550×550	B	≥C60	455	434	L≤15	20ΦD12.6	4Φ22	≥2000	Φb6	0.83	6.21	5407
YZH-600 x-x-x x	600×600	A	≥C60	507	486	L≤15	24ΦD10.7	4Φ25	≥2000	Φb6	0.60	4.63	6435
YZH-600 x-x-x x	600×600	B	≥C60	505	484	L≤15	24ΦD12.6	4Φ25	≥2000	Φb6	0.84	6.26	6435

Table 2: Reinforcement and mechanical properties of T-FZ piles (Part 1) (Concrete strength grade: C60)

Maximum side length B (mm)	Item	Number & diameter of prestressed steel bars	Specifications of spiral rebar	Side length of prestressed steel bar distribution B2 (mm)	Calculated value of effective concrete prestress σ_ce (MPa)	Bending resistance of the pile shaft			Shear resistance of the pile shaft	Tensile strength of the pile shaft		Compressive strength of the pile shaft			Theoretical mass (kg/10m)
						Test value of cracking bending moment M_cr (kN·m)	Design value of flexural load-bearing capacity [M] (kN·m)	Tested value of ultimate bending moment M_u (kN·m)	Test value for cracking shear force V_cr (kN)	Design value of axial tensile bearing capacity [N] (kN)	Control Standard Value for Class I Cracks N_k (kN)	Design value of compressive load-bearing capacity [R] (kN)
						Test value of cracking bending moment M_cr (kN·m)	Design value of flexural load-bearing capacity [M] (kN·m)	Tested value of ultimate bending moment M_u (kN·m)	Test value for cracking shear force V_cr (kN)	Design value of axial tensile bearing capacity [N] (kN)	Control Standard Value for Class I Cracks N_k (kN)	Clamp-and-press pile vs. impact-driven pile	Top-pressure pile	Implantable post
250	A	4ΦD7.9	Φb4	126	3.56	14	13	18	80	167	176	932	1065	1131	1355
	AB	4ΦD9.0			4.56	15	17	22	83	216	226
	B	4ΦD10.7			6.24	18	23	31	87	306	312
	C	4ΦD12.6			8.29	22	32	43	92	424	420
300	A	8ΦD7.1	Φb4	176	3.84	28	29	39	128	272	285	1403	1604	1704	2014
	AB	8ΦD7.9			4.67	29	35	48	131	333	349
	B	8ΦD9.0			5.92	33	46	62	136	433	445
	C	8ΦD10.7			8.03	40	65	87	143	611	611
350	A	8ΦD7.9	Φb4	206	3.81	38	41	55	160	333	350	1733	1980	2104	2574
	AB	8ΦD9.0			4.88	41	54	72	166	433	450
	B	8ΦD10.7			6.65	49	75	102	173	611	621
	C	8ΦD12.6			8.82	59	103	139	183	848	834
400	A	12ΦD7.9	Φb4	256	4.17	63	77	104	225	500	522	2358	2695	2863	3463
	AB	12ΦD9.0			5.33	68	99	134	933	649	671
	B	12ΦD10.7			7.25	83	139	188	244	917	923
	C	12ΦD12.6			9.56	101	176	238	258	1272	1237
450	A	12ΦD7.9	Φb5	276	3.76	71	83	112	252	500	525	2635	3012	3200	4037
	AB	12ΦD9.0			4.81	76	107	144	959	649	676
	B	12ΦD10.7			6.57	92	151	204	271	917	932
	C	12ΦD12.6			8.72	111	194	262	285	1272	1253

Prestressed Concrete Square Piles

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