建筑工程灌注桩中英文对照外文翻译文献.docx

1、建筑工程灌注桩中英文对照外文翻译文献中英文资料外文翻译文献Bored pileSummary Drill ( flushing, dig ) pile from the nineteen sixties, beginning in Henan province Nanyang region since the development application, because of its many advantages, has been widely used in soft soil, loess, including soil, expansive soil and other spec

2、ial types of foundation and industrial, civil, municipal, railway, highway, port and other types of Engineering practice. And precast pile, bored pile construction of no noise, no vibration, on the surrounding buildings and small environmental impact, pile diameter, buried deep, large bearing capaci

3、ty. Chinas drilling pile maximum diameter of pile has reached 4000mm, maximum deep pile has reached 104m, and the steel pipe pile maximum diameter of 1200mm, the largest pile of prestressed concrete pipe pile with deep 83m, maximum diameter of 1300mm, the biggest pile depth 40m. Along with our count

4、ry socialist construction is booming, with high-rise buildings, large span bridges on the rise, the bearing capacity of pile foundation with higher requirements. Large diameter bored pile therefore gets rapid development, pile length and pile diameter also do bigger more. However, in the existing va

5、rious methods of pile, bored pile has many advantages and is widely used in construction, but it is hard to avoid the impact of mud, which not only reduces the bearing capacity of pile expectations, but also caused a serious waste of materials. Manual hole digging pile is difficult to achieve greate

6、r depth, its bearing capacity is also difficult to just as one wishes. In view of bored pile in this situation, how to improve the pile construction technology level, make the input material to be more reasonable to use, so as to greatly increase the bearing capacity of single pile in engineering fi

7、eld, have become hot issues in recent years.The introduction of bored cast-in-place pile Perfusion pile refers to the construction site by mechanical drilling, steel pipe soil compaction or human mining method in the foundation pile hole in form, and on its inner placed reinforcement cage, concrete

8、made with different pile, drilling method, grouting pile can be divided again for cast-in-place pile, bored pile and digging several types of piles. Bored pile by pile into the definition and classification of a kind of pile.The characteristics of bored cast-in-place pile1、And sinking pile of hammer

9、ing method, construction noise and vibration is smaller2、To construct than the precast pile of large diameter of pile3、In all kinds of ground can be used4、The construction quality of the pile bearing capacity influence5、Because the concrete is in the mud perfusion is difficult to control, so the qua

10、lity of concreteBored pile construction method Percussion drilling, punching grabbing drilling and rotary drilling hole can adopt slurry wall construction method. The construction process is: site formation, slurry preparation, buried tube and laying work platform rig and positioning, drilling, hole

11、 cleaning and inspection of hole quality and lower steel cage, underwater concrete perfusion to pull out the barrel to check quality. Construction sequence： (1) the construction preparation Construction preparation comprise: selecting drill, drill, layout. Construction of bored pile drilling rig is

12、the main equipment, according to the geological conditions and various drilling machine applied to select conditions (2) drilling machine installation and positioning Istallation of drilling machine based if not stable, easy to produce in the drilling machine construction, pile and pile inclined inc

13、lined eccentric and other adverse effects, therefore requires the installation of foundation stability. On the formation of softer, sloping ground, be bulldozed, the pad plate or tie reinforcement. In order to prevent the pile position allowed, construction is very important to the set the center po

14、sition and the correct installation of drilling machine, the rig drilling machine, first use of the power drill and near the cage with the drill pipe, moving roughly position, and then Jack rack jacking, accurate positioning, so that the lifting pulley, drill bit or fixed drill hole cards and casing

15、 center in a vertical line, in order to ensure the verticality of the drilling rig. Drilling position deviation is not more than 2cm. Aligned with the pile location, with sleeper flat drill beam at the top of the tower, and symmetrical to the drill axis pulling cable wind rope. (3) buried tube Under

16、ground water level below the Kong Bitu under the hydrostatic pressure to the hole collapse, and even the phenomenon of flow of sand. If you can keep the borehole wall high underground water head, increase the hole hydrostatic pressure, to prevent collapse hole, hole wall. Casing in addition to play

17、this role, at the same time, good isolation of surface water, ground, protecting the orifice pile hole drill guide fixed (4) slurry preparation Drilling mud is composed of water, clay ( bentonite ) and an additive composition. A floating drilling waste slag cooling the drill bit, drill, lubrication,

18、 increasing hydrostatic pressure, and in the hole wall to form a slurry, partition within the bore to prevent seepage, the hole collapse effect. Modulation of the drilling mud and circulating purifying mud, should be based on the drilling method and formation conditions to determine the slurry consi

19、stency, slurry consistency should be considered stratigraphic changes or operational requirements of motor control, the mud is too thin, small, poor effect of elimination of slag wall; slurry is too thick will weaken bit impact function, reduce drilling speed. (5) drilling The borehole is a key work

20、ing procedure, in construction must strictly according to the operating requirements, in order to ensure drilling quality, attention must be given to the hole quality, must be opposite for this good midline and verticality, and pressed well casing. Must pay attention in the construction are continuo

21、usly added and pumping the slurry slag ( impact type ), but also at any time to check whether there is deviation phenomenon into hole. Using the impulse or clamshell type drilling machine construction, soil due to vibration and impact near the adjacent hole stability. So the drilled hole should be t

22、imely cleaning hole, decentralization and pouring underwater concrete reinforcing cage. Drill order should also be practical to plan, should not only guarantee a pile hole construction does not affect the last pile hole drill, and the moving distance of not too far and mutual interference. (6) the h

23、ole cleaning The drilling depth, diameter, location and shape of hole is directly related to the quality of pile and pile body black. Therefore, in addition to drilling process close observation supervision, to meet the design requirements in drilling hole depth, with deep, hole, pore shape, pore si

24、ze and other inspections. In the end hole inspection in full compliance with the design requirements, shall immediately proceed to bottom hole cleaning, avoid it too long that mud settling, caused by borehole collapse. For friction pile when the hole wall is easy to collapse, in underwater concrete

25、perfusion before the sediment thickness of not more than 30cm; when the hole wall is not easy to collapse, not more than 20cm. For the post, in water or shoot the breeze, sediment thickness less than 5cm. Hole cleaning method is to use different and flexible application of drilling rig. Usually you

26、can use normal circulation rotary drilling rig, reverse circulation rotary machine vacuum suction machine and slag pumping cylinder hole cleaning. The mud suction machine hole cleaning, required equipment, convenient operation, hole cleaning is thorough, but unstable in the soil should be used cauti

27、ously. Its principle is to use compressor generates high pressure air into a suction dredge pipeline will mud blowing. (7) pouring underwater concrete After finishing hole, can be prefabricated reinforcement cage hanging vertically into the hole, positioning to be fixed, and then using a perfusion c

28、atheter concrete, pouring concrete dont interrupt, or prone to the phenomenon of broken pile.Effect of bored pile bearing performance factors In the construction process, construction machinery, due to geological effects, often caused by pile soil ( weak layers ), the thickness of 0.2 0.5m, thick an

29、d up to 1m. Especially in soft soil with mud, drilling, hole bottom sediment is inevitable; even after careful cleaning hole, the hole cleaning after and before concrete, will precipitate some sediment, and in drilling process, widespread presence on the hole wall and the hole bottom soil disturbanc

30、e. All of these affect the bearing capacity of bored pile play. Pile static load test show that, bored pile end bearing capacity of only the ultimate load of the 15% 35%, the side resistance and tip resistance of the existing synchronization phenomenon. Give full play to the role of lateral friction

31、 resistance is only a few millimeters of the displacement of pile top, to give full play to the role of tip resistance of pile diameter, needed to reach 10% - 30% of the displacement of pile top. Such a large displacement in engineering is not allowed. Pile side friction resistance to damage, and th

32、e damage limit is reached, and the end resistance cannot get sufficient play, its potential is great. This is the ultimate bearing capacity of bored pile is not to cause. Research shows that, at the bottom of pile soil exists, not only affects the tip resistance of the play, also make the side frict

33、ion resistance loss. The existence of weak interlayer of pile, the pile body and the soil friction between the nature of the change, the friction between pile and soil by load transfer, is very bad. This is the bored pile bearing not tall benefit is another reason.Improve the bearing capacity of Bored Piles Ac