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GB/T 39757-2021: Building construction machinery and equipment - Code of practice for the safe use of concrete pumps and mobile concrete pumps with placing boom
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Building construction machinery and equipment - Code of practice for the safe use of concrete pumps and mobile concrete pumps with placing boom
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GB/T 39757-2021
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Basic data | Standard ID | GB/T 39757-2021 (GB/T39757-2021) | | Description (Translated English) | Building construction machinery and equipment - Code of practice for the safe use of concrete pumps and mobile concrete pumps with placing boom | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | P97 | | Word Count Estimation | 18,185 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 39757-2021: Building construction machinery and equipment - Code of practice for the safe use of concrete pumps and mobile concrete pumps with placing boom
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Building construction machinery and equipment - Code of practice for the safe use of concrete pumps and mobile concrete pumps with placing boom
ICS 91.220
P97
National Standards of People's Republic of China
Construction machinery and equipment
Rules for the safe use of concrete pumps and pump trucks
Released on 2021-03-09
2022-02-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Selection and responsibilities of personnel 2
5 Training 2
6 Personal protective equipment 3
7 Equipment Operation Management 3
8 Selection of equipment 5
9 Driving a truck-mounted concrete pump or pump truck 5
10 Arrival at the site and equipment placement 5
11 Pouring process 6
12 Treatment of concrete conveying pipe 7
13 Pumping special concrete 8
14 Cleaning equipment and conveying pipeline 8
15 The truck-mounted concrete pump or pump truck leaves the site 8
16 Check 8
17 Maintenance 9
Appendix A (informative appendix) Recommended signal 10
Appendix B (Normative Appendix) Inspection of Concrete Delivery Pipe 11
Reference 12
Construction machinery and equipment
Rules for the safe use of concrete pumps and pump trucks
1 Scope
This standard specifies requirements for the safe use of concrete pumps and pump trucks, including personnel selection and responsibilities, training, equipment operation management, and equipment
Selection and placement, pouring process, driving, cleaning, inspection and maintenance, etc.
This standard applies to concrete pumps and pump trucks (hereinafter referred to as equipment).
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 7920.4 Concrete machinery terminology
GB 28395-2012 Concrete and mortar conveying, spraying, pouring machinery safety requirements
3 Terms and definitions
The following terms and definitions defined in GB/T 7920.4 and GB 28395-2012 apply to this document.
3.1
Receivinghopper
Container for receiving concrete.
Note. Including the valve mechanism that transports the concrete to the conveying pipeline through the concrete piston, the mixing shaft, the access door to prevent personnel from contacting the moving parts, and the interlocking function
The protective screen can be used.
3.2
Endhose
The flexible flexible pipe at the discharge end of the concrete conveying pipeline.
3.3
Boomtipsafetydevice
A device installed at the end of the cloth arm and connected with the end hose to prevent the end hose from falling when the pipe clamp fails.
3.4
Wash-out adapter
When cleaning the concrete conveying pipeline, it is connected to the end of the conveying pipe, has a water/compressed air interface and is equipped with a closed short pipe with a pressure relief valve.
3.5
Professional competentperson
Personnel who are trained, have the knowledge and experience required to perform their duties, and are responsible for comprehensive inspections.
3.6
Operator
Personnel trained and operating equipment.
Note. The operator of the vehicle-mounted concrete pump or pump truck is required to be able to drive the vehicle and operate the concrete pump and the placing boom.
3.7
Signaller
A person who has been trained to convey information to the operator through a recognized signal or language.
3.8
Safetyinductiontraining
Training on safety production knowledge and on-site safety rules, safe passages, and location of safeguard facilities.
3.9
Supplier
The direct provider of the equipment such as the owner of the field operation equipment or its effective agent.
3.10
Hirer
Organizations and individuals who rent equipment from the supplier.
4 Selection and responsibilities of personnel
4.1 Individuals who abuse alcohol, drugs, and other factors that affect safety should not be selected for each post.
4.2 The operator should have the following conditions.
a) Be competent to operate equipment;
b) Have the vision, hearing and reaction ability to operate the equipment safely;
c) Have the physical ability to safely operate equipment;
d) Have the ability to judge distance, height and relative position;
e) Have been trained and qualified for similar models (see Chapter 5);
f) Have knowledge of the equipment and its safety devices;
g) Understand the responsibilities of signalmen and understand the signals in Appendix A;
h) Designated operating equipment;
i) Operators who need to drive truck-mounted concrete pumps or pump trucks should have a corresponding level of driving license.
4.3 Responsibilities of the operator.
a) Responsible for the placement and safe operation of the equipment according to the manufacturer's instruction manual and work safety plan;
b) If applicable, drive a truck-mounted concrete pump or pump truck;
c) Carry out daily inspections and report defects detected to supervisors;
d) When there is a signalman, strictly obey the signal sent by the designated signalman.
4.4 If the risk assessment or construction plan indicates that a signalman is needed, the selected signalman should be competent for the following duties.
a) Able to transmit signals between concrete pouring personnel and equipment operators;
b) If applicable, direct the safe movement of the concrete placing boom;
c) Use audio equipment (such as walkie-talkies) to give clear and accurate verbal instructions.
5 training
5.1 The training content for operators should include.
a) Safety awareness;
b) Knowledge of risk assessment;
c) The purpose and usage of personal protective equipment;
d) Selection and placement of equipment under site conditions;
e) Safe operation of equipment;
f) Cleaning of equipment;
g) The use of concrete delivery pipes;
h) Basic knowledge of concrete;
i) Precautions for working under overhead wires and cables;
j) emergency response;
k) Treatment of concrete pipe blockage;
l) Personal health and safety precautions;
m) Documents related to job responsibilities;
n) Daily and weekly inspection and maintenance of equipment;
o) If applicable, the safe operation of the concrete placing boom;
p) If applicable, check before driving;
q) If applicable, the driving of the vehicle;
r) If applicable, preventive knowledge of compressed air hazards;
s) a)~c) in 5.2.
5.2 The operator and the designated signaller should undergo the following training.
a) The use of signals (see Appendix A);
b) Use of communication tools;
c) The identification of special hazards (such as obstacles in the air) at the work site.
5.3 A training certificate shall be issued after the training is completed.
6 Personal protective equipment
6.1 Operators should be equipped with personal protective equipment such as safety helmets, safety boots, waterproof gloves, protective glasses, and warning reflective clothing according to working conditions.
It should be equipped with safety belts when there is a risk of falling, and earplugs, overalls, waterproof clothing, breathing equipment, and face shields should be equipped when necessary.
6.2 The personal protective equipment should be replaced in time according to the conditions of use.
7 Equipment operation management
7.1 The concrete pumping operation should formulate a plan, taking all foreseeable risks into consideration. The plan should be composed of professionals with professional knowledge and experience
Staff development. For repetitive concrete pumping operations under the same conditions, the plan should be formulated before the first operation and checked regularly to ensure
Keep it safe.
7.2 The supplier shall provide the tenant/contractor with a risk assessment, detailing the risks of concrete pumping operations.
7.3 The risk assessment should include the risks of working at heights. The supplier's work methods for cleaning and maintenance should try to avoid climbing on the equipment.
If it is really necessary to climb on the equipment to work, it should be carried out in a special workplace, and fall prevention measures should be taken.
7.4 The supplier shall provide the following information to help the lessee/contractor to select the equipment correctly.
a) The type and standard configuration of the equipment;
b) The structural form of the concrete placing boom;
c) The maximum vertical height and horizontal distance that the concrete placing boom can reach;
d) The weight of concrete delivery pipes, end hoses and accessories;
e) The maximum load of each leg to the ground;
f) The occupancy size of the equipment when all outriggers are deployed;
g) The maximum wind speed allowed by the concrete pump truck in the working state.
8 Selection of equipment
8.1 The characteristics of the equipment should be considered according to operational requirements.
8.2 The key points that the lessee should consider when selecting equipment include.
a) The access to the work site meets the requirements of the external dimensions and turning radius of the equipment;
b) Sufficient space for the legs of the equipment to be deployed correctly;
c) The ability of the ground to withstand the load applied by the equipment legs;
d) The outlet pressure of the concrete pump, the vertical and horizontal distance of pumping, the output of concrete per hour and the total amount of pumping required;
e) Underground space, cables close to the surface and other underground constraints;
f) Wires and cables, structures and other aerial obstacles;
g) The range of the farthest pouring point that the concrete placing boom can reach;
h) Suitable passage for concrete mixer truck to reach concrete pump hopper;
i) The requirement to be equipped with signalmen when the operator cannot see the concrete delivery terminal;
j) Special operating requirements or restrictions;
k) The need for reasonable design of the support of the concrete delivery pipe outside the equipment;
l) Fully protect the completed permanent project to prevent possible damage to it by the concrete placing arm;
m) The lessee's demand for maintenance of the conveying pipes it owns.
8.3 The supplier shall consider the selection of equipment and deliver it to the construction site based on the following contents, including.
a) a)~j) in 8.2;
b) Additional labor requirements.
9 Driving a truck-mounted concrete pump or pump truck
9.1 The driver should make necessary inspections of the vehicle before going on the road.
9.2 When driving on the road, the driver should abide by the traffic safety regulations and drive with caution.
9.3 The driver should be given sufficient time to drive to the construction site without speeding and risking.
10 Arrival at the site and equipment placement
10.1 Before the equipment arrives at the construction site, the lessee/contractor shall
The entry and exit passages of the mixer truck and the working position of the operator are discussed with the supplier to determine the placement of the equipment.
10.2 The lessee/contractor shall ensure that the site for the placement of equipment is level and hard. According to the maximum load marked on the equipment,
The surface should be able to withstand this load.
10.3 After the equipment arrives at the site, the operator should report to the site management department before entering the placement location.
10.4 The vehicle should drive into the designated location along the designated route. Reversing should be avoided as much as possible at the construction site. If reversing is necessary, it is better to use reversing radar, etc.
Visual aids are used to reduce the risk of collision, and vehicle commanders should be assigned to assist when necessary.
10.5 After entering the site, the operator should participate in site safety training in accordance with the requirements of the construction site.
10.6 The operator should obtain information about underground spaces such as drainage ditches and manholes from the construction site management department in order to determine the position of the outriggers.
Avoid it when placed.
10.7 The outriggers should be properly deployed according to the manufacturer's instructions. Under appropriate circumstances, the bottom of the outrigger should be
There is an expansion pad with sufficient strength and size on the seat cushion to reduce the ground pressure.
10.8 The operator of the concrete pump truck should check with the construction site management department to achieve the maximum wind speed on the site, and the wind speed should not exceed the manufacturer's specified maximum wind speed.
Limit wind speed for safe operation.
10.9 A safe distance should be kept between the concrete placing boom and the overhead wires and cables.
10.10 The operator of the concrete pump truck should verify the operation of nearby cranes and other concrete placing booms with the construction site management department
area.
10.11 During the operation of the equipment, all protective devices shall not be missing.
10.12 The operator should operate according to the manufacturer's instruction manual and work safety plan.
11 Pouring process
11.1 Before starting the equipment, the operator should check whether there are debris, tools, ice, etc. on the cloth arm and remove them.
11.2 Before the equipment is started, the operator and the construction staff representative of the pouring site should reach an agreement on the signal rules.
11.3 Before the start of pumping, the operator should check the functions of all controls and safety devices to ensure that they can work normally.
11.4 When using the remote control, the operator should cut off other modes of operation.
11.5 When performing remote control operations, the operator should choose a location that is beneficial and safe for work.
11.6 When the operator is operating in a position where the construction personnel of the pouring point cannot be seen, the signaller should be arranged to provide accurate signals for him
(See Appendix A).
11.7 When the operator cannot see the height of the concrete in the hopper, personnel should be arranged to monitor the height of the concrete in the hopper and be at the height of the concrete.
Send a signal to the operator when it is lower than the minimum safety height required by the manufacturer.
11.8 When there is a designated signal person, the operator should only respond to the signal from the signal person. The signalman and his signal should be able to be
The operator is clearly identified.
11.9 When the noise at the working position exceeds the allowable limit, the employer should provide the operator with appropriate hearing protection equipment and explain the usage.
11.10 The length of the hose at the end of the concrete placing boom shall not exceed the maximum allowable length specified by the manufacturer.
11.11 When operating the concrete placing arm, the operator should keep a safe distance from the overhead wires and cables.
11.12 When operating the equipment, if the operator believes that there is a risk of harm to himself or other personnel, and damage to property or equipment.
If it is dangerous, the operation should be stopped immediately and dealt with in consultation with the lessee/contractor.
11.13 When the concrete placing boom crosses the non-pouring area, measures should be taken to prevent the concrete from falling from the mouth of the delivery pipe.
11.14 It should be ensured that the construction personnel of the pouring site have received sufficient training on the safe operation of concrete cloth, especially should make them understand the connection with the end hose
Use-related risks.
11.15 The construction personnel of the pouring site should wear at least safety helmets, safety boots, waterproof gloves, protective glasses and warning reflective clothing.
11.16 When the pumping has just started and the concrete has not smoothly flowed out of the end hose, or the delivery pipe on the cloth arm is blocked, all
Personnel should keep a distance from the cloth arm and the end hose, and should not be in the danger zone. The danger zone is centered on the end of the cloth arm and at the end
The hose length is the area covered by the radius.
11.17 If pipe blockage occurs during the pouring process, the operator should immediately stop pumping and notify the staff to move to a safe location.
11.18 If the operator needs to disassemble the concrete delivery pipeline to clear the blockage, first perform the reverse pump operation to release the pressure in the pipeline. Fuck
The author should always treat the conveying pipeline according to the pressure condition. Before disassembling the conveying pipeline, wear suitable gloves and protective glasses.
11.19 It should be ensured that on-site personnel are not allowed to disassemble the pressure conveying pipeline under any circumstances.
11.20 When the equipment is unattended, shut down and isolate the operating device.
11.21 The concrete placing boom should not be used as a lifting appliance.
11.22 The arm end safety device should always be in place.
11.23 The pipe clamp of each conveying pipe shall have safety devices or functions to prevent accidental opening.
11.24 It is strictly forbidden to stand under the cloth arm.
11.25 During the pumping operation, no one is allowed to put hands or other objects (such as iron rods, etc.) into the hopper screen, or touch them with their hands.
Moving parts.
11.26 The space where the pump truck and the concrete pump driven by the internal combustion engine are constructed should have sufficient ventilation. When it is used in a building, it should be used
Take measures to extract exhaust gas.
11.27 If the pump truck needs to move on the construction site, first retract the concrete placing boom and place it on the support frame, and retract all the outriggers.
And locked.
11.28 The operator should obey the traffic management at the construction site.
11.29 The construction site administrator shall supervise the operators of the concrete mixer truck not to flush the waste water from cleaning the chute into the concrete pump or pump truck
In the hopper.
11.30 The operator using the equipment should operate in accordance with the provisions of 10.11 and 10.12.
12 Treatment of concrete conveying pipe
12.1 The lessee/contractor shall provide sufficient resources to assist the operator in lifting the concrete pipe and fittings.
12.2 The pipe and pipe clamp shall be selected according to the predetermined pressure of the conveying pipeline.
12.3 The conveying pipeline should be checked regularly according to the maintenance schedule. Check the delivery pipe according to Appendix B.
12.4 Do not fix the delivery pipe on the scaffold. If the site conditions are limited, another support frame should be set up, and the support frame should be able to withstand the transportation during pumping.
The load applied by the tube. Special fasteners should be used to fix the conveying pipe on the support frame.
12.5 Check and confirm that all horizontal and vertical pipelines are reliably supported.
12.6 Check and confirm that all pipe clamps are correctly installed with sealing rings and that the safety device functions normally.
12.7 Appropriate slopes or other facilities to protect the pipeline should be provided where people or vehicles cross the conveying pipeline.
12.8 In the case of excessively long conveying pipelines, pumping quick-setting concrete, high temperature weather and equipment damage, use the cleaning ball by means of reverse pumping
When the method of cleaning the conveying pipeline cannot be achieved, compressed air or alternative methods can be used to clean the pipeline. Air washing operation should be strictly in accordance with
12.9 Implementation.
12.9 The gas washing operation should be carried out by at least two trained personnel in accordance with the following requirements, and they should not leave the site before the end of the cleaning operation.
a) Personnel performing cleaning operations should wear protective clothing, safety helmets and protective glasses, and appropriate face shields should be worn;
b) Keep all personnel on site away from the conveying pipe, especially the discharge port;
c) The support and fixation of the conveying pipe should be reliable;
d) The hose should be removed from the delivery pipe;
e) The conveying pipe should not be turned within the last 25% of its length unless the conveying pipe is properly fixed;
f) A cleaning receiver should be installed at the end of the conveying pipe to collect sponge/rubber cleaning balls. Cleaning the receiver should allow residual
Concrete discharge;
g) The output pressure of the air compressor during cleaning should not be greater than the rated pressure specified by the manufacturer;
h) The compressed air should be introduced into the conveying pipeline through the cleaning joint, and the cleaning joint should be equipped with an air inlet control valve and at least one safety valve.
Full pressure relief valve;
i) Compressed air should gradually enter until the sponge/rubber cleaning ball moves steadily in the conveying pipeline;
j) When the operator controls the entry of compressed air, his assistant should pay close attention to the progress of the sponge/rubber cleaning ball, for example, by using
Tap the delivery pipeline with a hammer to determine where the pipeline is emptied. You can also observe the pressure gauge to understand whether the process is smooth;
k) When the sponge/rubber cleaning ball advances and the concrete resistance decreases, the operator should control to reduce the air flow into the conveying pipeline;
l) When the discharge rate of concrete is too fast, the air should be released through the pressure relief valve;
m) During the cleaning process, the conveying pipeline is a pressurized pipeline, and any pipe clamps should not be loosened or disassembled unless the conveying pipeline has been depressurized and obtained
Confirmed by on-site professionals.
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