Q235 Bailey Suspension Bridge / Prefabricated Compact Bailey Bridge

Suspension Bailey Bridge/prefabricated Compact Bailey Bridge

When reinforcing Bailey bridges in mountainous areas, construction safety is of vital importance. Here are some key safety considerations and measures:

1. **Preparation before construction**
- **Geological survey**: Before construction, a detailed survey of the geological conditions in the mountainous area should be conducted to ensure the rationality of the foundation treatment plan.
- **Special construction plan**: Prepare a special construction plan including design, assembly, dismantling, etc., and clarify safety measures.
- **Staff training**: All personnel involved in the construction must be qualified after training before they can take up their posts, and special operations personnel must be certified before taking up their posts.

2. **Foundation treatment**
- **Foundation bearing capacity inspection**: After the foundation is excavated, it should be checked whether the geology meets the design requirements, the concrete foundation should be poured in time, and drainage facilities should be well prepared to avoid rainwater soaking.
- **Foundation reinforcement**: According to the geological conditions, pile foundation reinforcement or foundation treatment (such as replacement filling, grouting reinforcement, etc.) is used to enhance the bearing capacity and stability of the foundation.

3. **Safety measures during construction**
- **Construction equipment management**: The machinery, equipment, materials, etc. used should comply with national and industry standards to ensure the safety of the equipment.
- **Protection of construction personnel**: Construction personnel must wear personal protective equipment such as safety helmets and safety belts, and it is strictly forbidden to work under the influence of alcohol.
- **Lifting operation**: When lifting Bailey piers, they should be assembled in layers to avoid lifting a single set of Baileys to the top at one time, and ensure that the connection is firm before proceeding to the next step.
- **Scaffolding and protective facilities**: The erected scaffolding must be firm and reliable, and protective nets should be installed around and below to prevent people and objects from falling.
- **Electrical safety**: Temporary electricity use at the construction site should be strictly implemented in accordance with relevant specifications, use safe voltage, and ensure safe electricity use.

4. **Inspection and maintenance after construction**
- **Inspection and acceptance**: After the construction is completed, the connection of each part should be inspected and accepted to ensure the quality of construction.
- **Regular maintenance**: After the reinforcement is completed, the bridge should be inspected and maintained regularly to promptly discover and deal with potential safety hazards.

Through the above measures, construction safety can be effectively guaranteed during the reinforcement construction of Bailey bridges in mountainous areas, ensuring the stability and safety of the bridges.

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