Description

Hot Rolled Steel Sheet Pile (HSP) is a type of steel structural member formed through a high-temperature rolling process, featuring interlocking edges. It can be interlocked to form continuous retaining/water-retaining walls. Main types include U-shaped, Z-shaped, and straight-web type (often called “straight type”).

Classification of Hot Rolled Steel Sheet Pile:

By Cross-Section Shape:

1. U Type Hot Rolled Steel Sheet Pile: Symmetrical cross-section, interlocking edges on both sides, convenient construction, good interchangeability, widely used for foundation pit support and temporary cofferdams (such as the “SLU” and “LU” series).

2. Z Type Hot Rolled Steel Sheet Pile: Asymmetrical cross-section, interlocking edges located on both sides of the neutral axis, continuous web, larger section modulus and moment of inertia, high stiffness, and small displacement, suitable for port revetments and deep-water cofferdams (high technical threshold, only a few companies worldwide can produce this).

3. Straight-web type (straight type) Hot Rolled Steel Sheet Pile: Cross-section approximately flat, low height, small footprint, suitable for narrow site ditch support or temporary retaining walls.

Note: L-shaped and S-shaped steel sheets are mostly cold-formed or specially customized sections and do not belong to the mainstream hot-rolled standard category; H-shaped steel piles belong to another category of “section steel piles” (GB/T 32285) and are not classified as hot rolled steel sheet piles.

Features of Hot Rolled Steel Sheet Pile:

1. High Strength and High Rigidity: Hot Rolled Steel Sheet Pile uses low-alloy steel (such as Q345B, SY390), with a yield strength of 345–460 MPa, uniform wall thickness, and excellent bending and shear resistance, making it suitable for high-load environments such as deep foundation pits and cofferdams.

2. Excellent Watertightness: Hot Rolled Steel Sheet Pile uses precision interlocking (such as Larssen type) mechanical locking to form a continuous sealing wall, suitable for high-salinity, deep-water, or seepage prevention projects.

3. Highly Efficient Construction: Hot Rolled Steel Sheet Pile is mechanically driven and extracted (using vibratory hammers or hydrostatic pressure), resulting in short construction periods, minimal land occupation, and suitability for most soil types, including clay, sand, and silt (excluding boulders/rock strata).

4. Reusable: Hot Rolled Steel Sheet Pile can generally be recycled 10–20 times or more. The steel is 100% recyclable after dismantling, making it environmentally friendly and low-carbon.

5. Excellent Durability: Designed for a lifespan of up to 50 years, some products (especially Z-type) feature enhanced corrosion resistance through zinc-aluminum-magnesium coating or thickened interlocking.

6. Standardized Dimensions and Stable Quality: Hot rolling ensures consistent cross-sectional geometry and mechanical properties, superior to cold-formed steel sheet piles.

The fundamental difference between hot-rolled steel sheet piles and cold-formed steel sheet piles lies in their manufacturing process (hot rolling vs. cold bending). The former offers superior performance but is more expensive, making it the dominant choice for large-scale permanent/temporary projects. Since 2018, China has achieved full domestic production of U/Z type sheet piles (through companies like Jinxi and Maanshan Iron & Steel), eliminating reliance on imports.

Applications of Hot Rolled Steel Sheet Pile:

Hot Rolled Steel Sheet Pile is primarily used for temporary or permanent retaining and water-blocking structures requiring high strength, high water tightness, and reusability. Typical applications include:

1. Foundation Pit Support: Hot Rolled Steel Sheet Pile is used for sidewall support and water tightness in deep foundation pits for subways and high-rise buildings;

2. Cofferdam Engineering: Hot Rolled Steel Sheet Pile is used for temporary or permanent cofferdams in underwater or deep-water foundation construction for bridges, docks, nuclear power plants, etc.;

3. Water Conservancy Bank Protection and Flood Control: Hot Rolled Steel Sheet Pile is used for reinforcement and seepage prevention walls for river channels, dams, locks, and breakwaters;

4. Ports, Wharves, and Waterways: Permanent wharf revetments, embankments, artificial islands, and breakwater structures;

5. Transportation and Underground Engineering: Tunnel working shafts, utility tunnel trenches, and railway/highway subgrade slope protection;

6. Emergency rescue and relief: Rapid sealing and support walls in emergency response to landslides, quicksand, floods, etc.

7. Contamination barrier: Vertical seepage barrier for contaminated sites, preventing the migration of pollutants.

Its U-shaped, Z-shaped, and other interlocking sections form a continuous, sealed wall through mechanical interlocking, possessing high bending stiffness, excellent water-stopping properties, rapid construction (mechanized excavation and extraction), and reusability (10–20 times or more). It is widely applicable to sandy soils, clay soils, and complex hydrogeological environments.

Specifications of Steel Sheet Pile:

Material Grade	SYW295/SYW390/SY295/SY390/Q295BZ/Q390BZ/Q420BZ
Size	1) 400100 – 600210MM 2)Wall Thickness:10.5-27.6MM 3) U and Z type sheet pile
Standard	AISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc
Usage	flood project,construction project,bridge etc.
Coating	1) Bared 2) Black Painted (varnish coating) 3) galvanized
Technique	hot rolled,cold rolled
Delivery	Container, Bulk Vessel.
Quality	1) No damage, no bent 2) Free for oiled&marking 3) All goods can be checked by third party inspection before shipment

Type	Width	Height	Thickness	Sectional area	Weight per pile	Weight per wall	Moment of Inertia	Modulus of section
	mm	mm	mm	Cm2/m	Kg/m	Kg/ m2	Cm4/m	Cm3/m
WRU7	750	320	5	71.3	42	56	10725	670
WRU8	750	320	6	86.7	51	68.1	13169	823
WRU9	750	320	7	101.4	59.7	79.6	15251	953
WRU10-450	450	360	8	148.6	52.5	116.7	18268	1015
WRU11-450	450	360	9	165.9	58.6	130.2	20375	1132
WRU12-450	450	360	10	182.9	64.7	143.8	22444	1247
WRU11-575	575	360	8	133.8	60.4	105.1	19685	1094
WRU12-575	575	360	9	149.5	67.5	117.4	21973	1221
WRU13-575	575	360	10	165	74.5	129.5	24224	1346
WRU11-600	600	360	8	131.4	61.9	103.2	19897	1105
WRU12-600	600	360	9	147.3	69.5	115.8	22213	1234
WRU13-600	600	360	10	162.4	76.5	127.5	24491	1361
WRU18- 600	600	350	12	220.3	103.8	172.9	32797	1874
WRU20- 600	600	350	13	238.5	112.3	187.2	35224	2013
WRU16	650	480	8	138.5	71.3	109.6	39864	1661
WRU 18	650	480	9	156.1	79.5	122.3	44521	1855
WRU20	650	540	8	153.7	78.1	120.2	56002	2074
WRU23	650	540	9	169.4	87.3	133	61084	2318
WRU26	650	540	10	187.4	96.2	146.9	69093	2559
WRU30-700	700	558	11	217.1	119.3	170.5	83139	2980
WRU32-700	700	560	12	236.2	129.8	185.4	90880	3246
WRU35-700	700	562	13	255.1	140.2	200.3	98652	3511
WRU36-700	700	558	14	284.3	156.2	223.2	102145	3661
WRU39-700	700	560	15	303.8	166.9	238.5	109655	3916
WRU41-700	700	562	16	323.1	177.6	253.7	117194	4170
WRU 32	750	598	11	215.9	127.1	169.5	97362	3265
WRU 35	750	600	12	234.9	138.3	184.4	106416	3547
WRU 38	750	602	13	253.7	149.4	199.2	115505	3837
WRU 40	750	598	14	282.2	166.1	221.5	119918	4011
WRU 43	750	600	15	301.5	177.5	236.7	128724	4291
WRU 45	750	602	16	320.8	188.9	251.8	137561	4570
WRZ16-635	635	379	7	123.4	61.5	96.9	30502	1610
WRZ18-635	635	380	8	140.6	70.1	110.3	34717	1827
WRZ28-635	635	419	11	209	104.2	164.1	28785	2805
WRZ30-635	635	420	12	227.3	113.3	178.4	63889	3042
WRZ32-635	635	421	13	245.4	122.3	192.7	68954	3276
WRZ12-650	650	319	7	113.2	57.8	88.9	19603	1229
WRZ14-650	650	320	8	128.9	65.8	101.2	22312	1395
WRZ34-675	675	490	12	224.4	118.9	176.1	84657	3455
WRZ37-675	675	491	13	242.3	128.4	190.2	91327	3720
WRZ38-675	675	491.5	13.5	251.3	133.1	197.2	94699	3853
WRZ18-685	685	401	9	144	77.4	113	37335	1862
WRZ20-685	685	402	10	159.4	85.7	125.2	41304	2055
WRL1.5	700	100	3	724	21.4	30.6		145
WRL2	700	150	3	1674	22.9	32.7		223
WRl3	700	150	4.5	2469	35	50		329
WRL4	700	180	5	3979	40.4	57.7		442
WRL5	700	180	6.5	5094	52.7	75.3		566
WRL6	700	180	7	5458	57.1	81.6		606
WRS4	600	260	3.5	5528	31.2	41.7		425
WRS5	600	260	4	6703	36.6	48.8		516
WRS6	700	260	5	7899	45.3	57.7		608
WRS8	700	320	5.5	12987	53	70.7		812
WRS9	700	320	6.5	15225	62.6	83.4		952
WRX 600-10	600	60	10	144.8	68.2	113.6	396	132
WRX 600-11	600	61	11	158.5	74.7	124.4	435	143
WRX 600-12	600	62	12	172.1	81.1	135.1	474	153