Cement pipe jacking machine

Large hydraulic pipe jacking machines are specially designed for large-scale pipe jacking projects. They are generally used in cement pipe crossings, horizontal movement of houses and buildings, construction of sewage pipes, and crossing of roads and rivers.
The main machine part adopts a large diameter of 1000 tons. The overall diameter of a hydraulic cylinder, the total length, the piston diameter, and the weight are up to , the relief valve (plate gear pump is updated to a type plunger pump, the maximum pressure can reach the guide switch (automatic reversing valve two-way oil pipe
The top block is a vertical top) is used between the oil cylinder and the cement pipe
The stopper (a horizontal top) blocks the front end of the cement pipe to prevent damage caused by contact between the cement pipes
The rail is used to advance the cement pipe, increasing the stability of the equipment and reducing friction with the ground.
One excavating truck is used for excavating
Main engine overall dimensions
Pumping station overall dimensions
Main engine quality
Pumping station quality
Jacking force
Maximum working pressure
Single jacking process
Single laying length
Preparation work before construction
Before construction, choose to excavate the working pit, put the host into the working pit, and the working pit The selection and excavation are critical to the success or failure of the project construction
First, grasp the conditions of underground facilities and pipeline obstacles in the construction section, and then select the excavation work pit and jacking work (optical cables, electric cables, gas pipelines, thermal pipelines, (The depth and location of sewage pipes and water pipes). At the same time, it is necessary to know whether there are backfill garbage, stones, foundations and other obstacles in this section of the road
Only after the underground conditions are known and understood can the construction route and the location of the working pit be determined to prevent Encountering obstacles during construction jacking and pulling back damages the machinery and accessories
List of materials required for the cement pipe jacking machine
Name
Specifications
Quantity
Remarks

Hydraulic oil

Kilogram


Line drop benchmark
Half a catty
Only
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Small mover

Handle


Sleeper

Root

< br/> Level ruler

Only


Open handle

Only


Crowbar
Rice
Tree


Shovel

Handle


Sledgehammer
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Only


Rope

Meters


Sixteen-work method
Machine Dig the working pit first, and then support it after it is dug. If the working pit encounters soft soil or quicksand, support must be built around it to ensure the safety of the machine and personnel.
After completing the working pit, first place the track into the working pit, find the correct direction along the construction route, and adjust the level.
The pipe jacking machine is smoothly lifted into the working pit and placed on the track.
According to the diameter of the pipe, it is necessary to excavate the soil forward along the track direction. The length and the length of the unearthed soil in front can be decided and controlled according to the terrain and soil conditions
The cement pipe is smoothly hoisted into the working pit.
Place the block horizontally at the top of the rear end of the cement pipe.
In places where the quality is intact, the general cement pipe can be jacked in two times, with the jacking block (vertical jacking) being one meter and two times at a time.
Activate the high-pressure pumping station until the oil cylinder and the stopper are pushed up. When checking, check whether the rear support is firm. After confirming that the rear support is firm, you can push the cement pipe forward. If there is silt, remove it before pushing forward, and so on until completion.
Precautions during the Seventeenth Work
The excavation technique of the soil workers is the key to the smooth and accurate jacking of cement pipes. Therefore, the soil workers are required to not only pay attention to safety, but also choose the right soil according to the soil quality and pipe diameter. The size and horizontal direction of the excavation.
During the jacking process, the main body of the pipe machine must be jacked smoothly along the track with the piston rod, jack block, and cement pipe. If an abnormality occurs, continue jacking after the abnormality is discharged.
Support is a very important part of the pipe jacking facility. If the back support is not strong, the jacking work cannot proceed smoothly. Therefore, strengthening the back support is very important in the pipe jacking project. It is best to use square wood for the back support. , arranged in single or double rows, and cement pouring is required if necessary.
The mobile pumping station needs to be equipped with a safety protection electrical box and a low-voltage line (for lighting when digging soil in the pipe).
In order to ensure construction quality and safety, construction personnel must strictly abide by operating procedures to ensure the smooth progress of the project.
Pay attention to regular maintenance of the machine, check the operating status of the machine at any time, and solve problems in a timely manner if any problems are found.
When the machine is running, the operator cannot leave the machine, and generally the normal working pressure cannot exceed MPa.
When installing the oil pipe, you must check whether there is a rubber ring on the interface, otherwise oil leakage will occur.
Cylinder piston rod (stroke). The safe stroke cannot be exceeded. If the stroke is exceeded, the machine may be damaged or people may be injured.
After the plug ejector rod returns to its original position, the machine must be stopped and the operating lever returned to its original position (the machine can no longer pump out oil and pressurize, otherwise the machine will be damaged or someone may be injured.
The above items must be paid attention to, otherwise the oil cylinder It will break the screws and damage or injure people.
After the construction is completed, the pressure must be relieved before disassembling the oil pipe (just push the operating lever back and forth a few times, otherwise the hydraulic oil will spray out and injure people.
After the work is completed Seal both ends of the oil pipe.
Frequently Asked Questions and Troubleshooting
If the speed is too slow or the imagination stops during the jacking or back-towing process, you should check whether the hydraulic oil is short of oil and the pressure handle (relief valve) Check whether there is any impurity in the oil that blocks the key parts of the relief valve or reversing valve. (It should be removed, cleaned and returned to normal condition after installation.)