Rammer tube hammer specification4
Rammer tube hammer specification4
Underground water level, rock depth (if meet the bedrock). Exploration results should be reflected in the construction design.
7.2 engineering design
According to engineering requirement and engineering survey results are engineering design. Engineering design including the construction organization set
Meter, engineering budget and construction drawing design, etc. Each line engineering department of engineering design has different to
Summing rules, in this not carry on the detailed introduction. But for rammer tube hammer laying engineering design must be considered such as
A. sure tamper tube hammer laying feasibility
According to the engineering survey, engineering quality requirements, formation conditions and previous construction experience, decided to this
Project is available ram tube hammer pipe-laying construction technology.
B. sure laying route and depth
According to the surface of each case, determine the first survey through laying route, and then according to the underground exploration conditions
Laying depth. In the party a certain spread line offline without laying space, must proceed the consultation, and new
Line engineering investigation to determine the best laying route and laying depth.
Cristiano prediction accuracy of laying
For rammer tube hammer laying of non point to laying, pipes to target the deviation of pit by pipe length, diameter,
Formation conditions, construction experience and so on various factors, prediction and control good laying accuracy is engineering into
The key to losing.
D. determine whether grouting
General formation is dry, laying length is longer, larger diameter, should consider grouting lubrication. Sure note
Plasma to preset injection pipe.
7.3 laying preparation work
Laying preparation work includes mechanical approach, working pit excavation, ready to steel tube and machinery installation work, etc
Mechanical approach is mainly air compressor, electric welding machine, tamper tube hammer and auxiliary machines and tools of the approach.
Working pit excavation including the tube pit and target pit excavation. Formal before construction should according to the construction plan
Dig down tube pit, general den long for: section length + tamper tube hammer length + 1 m, width of the den for: pipe diameter + 1 m.
In the water-bearing strata excavation, should be done before the precipitation work. For the sand content small viscosity formation, because of its
Water permeability difference, generally USES the pit drainage can. When excavation depth is deep, high water level, can be used
Well point precipitation. For sintering poor sand, unable to pit drainage, must be well point precipitation,
For water level drop to the den 1 m below the ability when excavation. In city construction, because of the underground pipeline network are better than general
More complex, difficult to ascertain foundation pit position if there is a pipeline, so should as far as possible need not excavator under excavation
Tube pit to prevent damage unknown line. Target pit relative to dig a short, used for ramming pipe after completion of the qing
Soil operation, the pit size, position apparent convenient operation and decide, can be in rammer tube process excavation.
The above work can be ready machinery installation. As shown in figure 1 shows, next tube pit first
Installed in the guide (short distance through laying doesn't even have to guide), adjust good guide position, however
After steel tube on the guide rail. In the steel pipe into the ground at the end of the welding on cutting head. Such as decision grouting, but also
Must be in the cutting head after welding on injection nozzle, and connection good grouting system. Use tensioner will tamper tube hammer, adjustment
Taper sleeve (if you use words), unearthed apparatus, tamper tube head and to pave steel pipe together, make them become one
A whole. Will tamper tube hammer blast pipe through the piping system and air compressor phase connection. At this time all the preparation
Clue, waiting for rammer pipe work.
8. Use method and the matters needing attention
8.1 method of use
8.1.1 in excavation good foundation pit installation guide (can use two I iron or steel channel), adjust the guide
Direction and levelness, will guide the den and fixation.
8.1.2 cutting head and steel pipe welding together, to launch pit wall will be placed on the guide rail steel.
8.1.3 according to the diagram (1) will be connected with tensioner will tamper tube hammer and steel tube tension make it become a
8.1.4 oiler filled with lubricating oil, chemical mud configuration, irrigation in slurry storage tank.
8.1.5 start empty press, open the main inlet valve, grouting tank inlet valve and grouting valve, commissioning grouting quantity.
Grouting quantity according to formation condition adjustment, low moisture content of the formation of the grouting quantity to a few bigger, and can be small
8.1.6 closed grouting valve, open the rammer tube hammer inlet valve, slow start tamper tube hammer, the steel pipe shock departure