ASTM BS GB Triple Bailey Truss Bridge Compact Panel Bridge ISO9001

Triple Trusses Bailey Bridges/compact Panel Bridge

After a heavy rainstorm, Bailey bridges need to undergo a series of special inspections to ensure their safety and stability. The following are the inspection items that need to be focused on:

1. **Foundation inspection**
- **Inspect foundation settlement**: Heavy rain may cause uneven settlement of the foundation, especially the piers and abutments. Check whether the foundation has obvious sinking or tilting.
- **Inspect foundation stability**: Check whether there is water accumulation or hollowing caused by scouring around the foundation, and ensure that the foundation is firmly connected to the surrounding soil or structure.

2. **Bridge deck inspection**
- **Inspect bridge deck cracks**: Heavy rain may cause bridge decks to crack or deform, and the bridge decks need to be carefully inspected for new cracks, warping or displacement. If damaged, they should be replaced if necessary.
- **Inspect bridge deck drainage**: Ensure that the bridge deck drainage system is unobstructed to prevent water accumulation from further eroding the bridge deck.

3. **Structural inspection**
- **Inspect connectors**: Check whether the Bailey plate's connecting pins, bolts, beam clamps and other connectors are loose, detached or damaged. If it is loose, tighten or replace it in time.
- **Check the overall structural deformation**: Observe the overall shape of the bridge and check whether there is obvious deformation, twisting or tilting.
- **Check the wind-resistant tie rod**: Make sure the wind-resistant tie rod is firmly installed and not loose or damaged.

4. **Safety facility inspection**
- **Check the warning signs**: Check whether the warning signs at both ends of the bridge and on the bridge are complete and clear. If they are detached or damaged, they should be replenished and repaired in time.
- **Check the guardrail**: Check whether the guardrail is firm, whether it is damaged or deformed, and ensure that it can effectively prevent people and vehicles from falling.

5. **Drainage system inspection**
- **Check the drainage channel**: After the heavy rain, it is necessary to check whether the bridge deck drainage channel is unobstructed, clear the blockage in time, and prevent the accumulated water from further eroding the bridge foundation and structure.

6. **Other inspections**
- **Check the bridge deflection**: Use professional equipment to measure the mid-span deflection of the bridge to see if it has increased. Increased deflection may indicate that there are certain problems with the bridge structure, and further analysis of the cause and corresponding measures are needed.
- **Check the rust condition**: Heavy rain may cause the metal parts of the bridge to rust, which needs to be checked and anti-rust treatment is carried out in time.

Through the above inspections, the impact of heavy rain on Bailey bridges can be fully evaluated, potential safety hazards can be discovered and dealt with in time, and the safe use of the bridge can be ensured.

Specifications:

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CB200 Truss Press Limited Table
NO.	Internal Force	Structure Form
		Not Reinforced Model				Reinforced Model
		SS	DS	TS	QS	SSR	DSR	TSR	QSR
200	Standard Truss Moment(kN.m)	1034.3	2027.2	2978.8	3930.3	2165.4	4244.2	6236.4	8228.6
200	Standard Truss Shear (kN)	222.1	435.3	639.6	843.9	222.1	435.3	639.6	843.9
201	High Bending Truss Moment(kN.m)	1593.2	3122.8	4585.5	6054.3	3335.8	6538.2	9607.1	12676.1
202	High Bending Truss Shear(kN)	348	696	1044	1392	348	696	1044	1392
203	Shear Force of Super High Shear Truss(kN)	509.8	999.2	1468.2	1937.2	509.8	999.2	1468.2	1937.2

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CB200 Table of Geometric Characteristics of Truss Bridge(Half Bridge)
Structure	Geometric Characteristics
	Geometric Characteristics	Chord Area(cm2)	Section Properties(cm3)	Moment of Inertia(cm4)
ss	SS	25.48	5437	580174
	SSR	50.96	10875	1160348
DS	DS	50.96	10875	1160348
	DSR1	76.44	16312	1740522
	DSR2	101.92	21750	2320696
TS	TS	76.44	16312	1740522
	TSR2	127.4	27185	2900870
	TSR3	152.88	32625	3481044
QS	QS	101.92	21750	2320696
	QSR3	178.36	38059	4061218
	QSR4	203.84	43500	4641392

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CB321(100) Truss Press Limited Table
No.	Lnternal Force	Structure Form
		Not Reinforced Model				Reinforced Model
		SS	DS	TS	DDR	SSR	DSR	TSR	DDR
321(100)	Standard Truss Moment(kN.m)	788.2	1576.4	2246.4	3265.4	1687.5	3375	4809.4	6750
321(100)	Standard Truss Shear (kN)	245.2	490.5	698.9	490.5	245.2	490.5	698.9	490.5
321 (100) Table of geometric characteristics of truss bridge(Half bridge)
Type No.	Geometric Characteristics	Structure Form
		Not Reinforced Model				Reinforced Model
		SS	DS	TS	DDR	SSR	DSR	TSR	DDR
321(100)	Section properties(cm3)	3578.5	7157.1	10735.6	14817.9	7699.1	15398.3	23097.4	30641.7
321(100)	Moment of inertia(cm4)	250497.2	500994.4	751491.6	2148588.8	577434.4	1154868.8	1732303.2	4596255.2

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Advantage

Possessing the features of simple structure,
convenient transport, speedy erection
easy disassembling,
heavy loading capacity,
great stability and long fatigue life
being capable of an alternative span, loading capacity