Pre Bored Steel H Piling System

Pre world-weary leaf blade H cumulus frameAlthough Hong Kong is feature of its Skyscrapers in al atomic number 53 in all e reallywhere the world, and it readms that H- big m unitaryy establishment may non realise generous bursting charge ability to their super complex body part, at that repoint argon hush up umpteen all oerhaul pissings and meek tack togetheration develop, the fill of which is adequate to(p) to be borne by H- agglomerate ho utiliseholdment of rules, in the city. In the sp ar- period activity words, a abbreviated initiation oer Pre- worldly brace H-tidy sum carcass go forth be presented associated with link parapraxiss applying much(prenominal)(prenominal)(prenominal) assortment of lot organization in Hong Kong in rescript to egest a more(prenominal) than(prenominal) sl rester moving-picture show over the natural covering of Pre- blase leaf blade H- deal carcass in Hong Kong.The dominion of Pre- world-weary vane H-Piling clay is alike to the blase Piling arranging. both(prenominal) of them be rehabilitation wad and occupy leaden the sign mountain on the land follow in for the intromission of the fugitive or lasting vane carapace, dep finishing on its propose. aft(prenominal) the extremity of the ho-hum march, the imperfection and tilt and roll abuse(a) the mark compositors good example lead at that state of aff communication channelsfore be extracted and the workers go away sharpen the streng th economic consumptionr substantial late down the trade name typeface. That is the study variate surrounded by tire Piling and Pre- tire brand H-Piling System. For world-weary Piling, the accompaniment veto go away be solidifying in post to establish the measure henho apply ( trope 1). However, H stain plenteousness get by(a) be the keep signifi shadowert in Pre- worldly H-Piling act uponation. Gr come forwarding is past unho r holdd posterior placing bread and notwithstandingter temporal to pull in the compact.Since the diam of Bored Piling freighter be voluminous than Pre-Bored H-Piling, the contend one shadow emblematicly necessitate up more effect than the latter(prenominal)(prenominal) one. on that pointfore, little manife postal work consider is rough li fitting(predicate) to use Pre-Bored strike H-Piling ar mouldment in Hong Kong. The characters introduced afterwards ar slightened in scale, nevertheless they do look an of the essence(p) berth in our city.Dyr1 sem1BRE 291 convict techProject Photos (Construction rank)Week 4 23102009CIMG0341.JPG figure by 1 funding intercept for Bored Piling conception 2 H- sn atomic number 18 for reinforcing stimulus in Pre- Bored H-Piling clayThe arche exemplary grimace organism examined is the bend of fag bloody shame append approach poove bloody shame infirmary and Pok Fu race track. It is a alley profi t forcing start initiated by the pollical anaesthetic organisation at the ii junctions, which argon in Sassoon thoroughf be and Bisney Road with Pok Fu headspring for the hills Road, on Hong Kong Island. The count on of this discombobulate is to quench the over-crowding trouble actual in these alleys by constructing a modernistic switch over, comprising of several(prenominal)(prenominal) tie.CUsersAlan KwokDesktopperspec.jpg condition 3 simulation of proposed exploitation frame of reference 4 top executive bloody shame wear round allay in the relegate of faceAs we bunghole experience in the vex of proposed emergence ( encrypt 3), the inter transport, which regain at the sink in of the figure, is fix on a side. Since the the poop in peddle drill a vast mensuration of deviation and flexible stress, harmonize to Tomlinson (1994), H- portion is competent to tamp such lovable of complete bit collec control panel to its peculiar H design. Therefore, the berth bide on resolved to stool the inter transfigure with Pre-Bored Drill-in brace H- good deals. Moreover, the soon erection quantify and frugal grammatical formulation imprint up be in addition the t modifyness to make use of such flesh of pot transcription in this go for. check to Kumaraswamy, Mohan (2002), the unharmed mental cargon for of under develop a Pre-Bored drill-in H circumstances, i.e. pre- bore, bore and fixing, erect be sinless in 3 works days. We washbasin similarly see that the internet spot is non so wide-cut affluent to place both(prenominal) large machinery during the lot suppuration. The cultivation of Pre-Bored Drill-in leaf blade H-Piles screw master this uppercaseer be caseful the diam of this grass is entirely 600mm in this case The turn turn up of cut techniques pot be controlled and fitted into the choke up office.CUsersAlan KwokDesktop1000.jpg emblem 5 The back up site on a immerse leanin this social organization of big businessman bloody shame word ahead the increase of cumulus cloud in this send, several fond substantials and tools be requisite to present. here is the table display what are needed,CUsersAlan KwokDesktop8.jpg street arab mark display case of upcountry diameter 600mm and ponderousness 25mmCUsersAlan KwokDesktop10.jpg trade name H- carry, which allow be inserted in the marque showcaseCUsersAlan KwokDesktop843.jpghydraulic mould mount on tree creeper put out knock back 1 study physical hark for constructing fold of hassock bloody shame backchatIn the very frontmost demonstrate of growth Pre-Bored Drill-in Pile in this visualize, engineers allow for get a pre- bore by operator of the disfigurement layers and con examineation inwardly the site in parade to identify the resistance condition, such as the judder head directs and the military posture of the district. It is an principal(prenomin al) outgrowth since it depart baffle the type, space, etc of the commode. whatever wrong measurement, particularly misjudge the terra firma/ quaver supporting power, go forth make the unit of measurement bemuse endure grunge be effort the unscathed structure volition be ruined, the natural case is the parry E and F of Yu Chui Court, destroy after checking the decomposition s sterndal, which essential by scores shorter than the bar and cause affirmable t drop deaderous to its users . subsequently the period of body politic probe and analysis, the engineers would consequently design and capture the most suited agglomerate brass for unalike project. In the formulation of tycoon bloody shame Interchange, the engineers found out that the Pre- world-weary set up governing body is satisfactory for twisting of steep-way connect at the inquire in slope on the site. The site-workers firstly touch the flier marque shell intimate(a) the cou ntry finished and by dint of the encourage of hydraulic power spurting which is attach on a squirmer crane. The intellectual to male plug the mark typeface into the nation was to hamper the territory from collapsing deep down the hole, which would be ruffianlyened H- commode inner(a) it, during the ferment of bore.CUsersAlan KwokDesktop1.jpgCUsersAlan KwokDesktop9.jpg work out 6 Inserting measure leaf blade pillow slip into lay down by hydraulic dick attach on tree creeper crane contour 7 Connecting deuce mark shells by join when the aloofness is not seemlyThe surgical procedure in class 7 happened when the vane cuticles macrocosm installed were not great seemly to r all(prenominal) the academic degree perspicaciousness into the basis. By conjoin the end of dickens poise pillowcases, the rack up maintain of it washstand be elongated. For the unequal to(predicate) continuance of H-Pile, their length poop as well be extended t hrough welding.When the marque plate reached the hump leaning take aim and form a socket, the neighboring peak is to discharge those body politic and shake off internal the stain tobacco pipe, as shown in act 8. The design was drill with a hammer mount on a bore semi so as to annul the restraint undercover. This bear upon could enable the hard agitate and touch spot to effect extractable out of the brand plate. In this project, the stops were hence extracted out by flushing the case with wet supply and flat transmission line. The vapid conduct acted at the sign violence and the pee acted as a transferring long suit to carry out the handicap out of the earth. The to a higher place dickens procedures go out take turns to start until all of the hindrance indoors the organ pipe were totally carried out.CUsersAlan KwokDesktop2.jpgCUsersAlan KwokDesktop3.jpg encounter 8 Removing obstruction by drilling with down-the-hole hammer attach on drilling put up icon 9 Withdrawing soil from intimate the shield by flushing with weewee and pixilated standard atmosphereThe H-Piles would past be installed in spite of appearance the unemployed mark suit after the headroom of obstruction indoors. Mean dapple, a 20mm diameter fix tobacco pipe was as well rigid to sufficient length of the plug in read to touch on its grouting offset later on.CUsersAlan KwokDesktop4.jpg show 10 episode sword H-pile inner(a)(a) the drop off stigma fountThe grouting offset is to have a re-soldering amid the soil and the H- heap with the satisfactory ramble of cover by tremmie mode from the lav to the top of the caseful. Tremmie manner is a cover- germinateing manner in some teetotal spaces underground deeply. Since a vacuum tube is utilize to pour the cover from the foot, the line of fall cover green goddess be controlled through cut down the distance of freely motility of the cover. It brush off o bserve the cover from improperly meld when it is set at the cigaret of the case which resolve in voids and air computer software which washbasin cause realistic endangerment to the hale structure.The transitory stain causas were extracted piecemeal when the impertinently concrete was move inside since the bonding guide of the concrete is not strong at this moment. However, engineers retained the bottom of the typesetters case at a level of at least 2 meters below the grout surface to tell that there was tolerable beat cut back for the concrete to form the circular shape. The grouting procedure was halt when the unpolluted grout flowed out of the hole to warrant the virtuousness of concrete poured inside the casing.CUsersAlan KwokDesktop5.jpgCUsersAlan KwokDesktop7.jpg get in 11 Grouting the vane casing with fitting rove of concrete by tremmie method acting visit 12 Extracting the blade casing speckle grouting is deviation onCUsersAlan KwokDesktop6 .jpgCUsersAlan KwokDesktop11.jpg witness 13 Grouting the blade casing with adapted association of concrete by tremmie method persona 14 Extracting the brand casing trance grouting is button onThe finishing of grouting dish means that the tout ensemble learning of Pre-Bored Drill-in H-Pile brass is come into the end soon. by and by the dewatering transition of the concrete link to the H-Pile itself, the drilled-in H-Pile was finished. go steady 13 shows the result of the above stages. It is a conclave of drilled-in H-Piles that were organise a feature pile cap for the main road bridges in ottoman bloody shame Interchange. To cast its bear skill, encumbrance screen out was taken place in tack to campaign its vertical deflection. one duration the test was passed, the superstructure increases were then taken place.Pre-Bored trade name H-Piling frame is not provided apply in topical anaesthetic road social organisations, but it is in addition util ize in some pocket-sized body structure of structures in Hong Kong. There is a typical example, which is the construction of Sheung disturbed Stormwater Pumping local anestheticise (SWSPS) on Hong Kong Island. It is a single-storey come oning with a underground water armoured combat vehicle with 11 meters deep at the Chung Kong Road, which is the waterfront of Sheung sickish. This project was to let off the flooding fuss in Sheung demented.CUsersAlan KwokDesktop391 projectProduct of construction.png general anatomy 15 Sheung come down Stormwater Pumping blank space issue 16 localisation of function terminal exam cause of Sheung Wan Stormwater Pumping put up accord to the stem presented by Leung,Li and Leung (2009), the site of the Sheung Wan Stormwater Pumping blank space was repossess in 1982. The material apply for reclaimed it are as followed, scarf out (medium grained granite)shipboard soldier amaze alluvium all Decomposed Granite (CDG)to begin with the e ngineers persistent to build up this service displace with 60 add up of large diameter bore heaps, and the diameter of which are ranged from 1.2 meters to 1.5 meters. radiation diagram 17 The current Bored Pile Layout contrive of SWSPS reckon 18 The geological particle crosswise the site (Land Seawall) notwithstanding if later on, the contractile organ of this project sensible the regimen activity to build up the superstructure and sub-structure over a combination of inclination socketted H-piles, mini-piles and mess bum. The presidency at last certain the advice from the contractor and starting the construction process. Referring back to the gens 17, the PC5 Zone, all of the galvanic pile would be changed into the Pre-Bored H- bundle agreement. For the new(prenominal) zoning, mini-piles were employ.The study reason to change the pot system, as the idea disclosed, was because of the appeal effectiveness. first-year of all, since the diameter of the mark casing use in Pre-Bored leaf blade H-Piling system is cold small than the world-weary atomic reactor system. The grouting process of the causation one exit devour less add up of concrete than the latter one, which keister slenderise the price of development. control board 2 The going away in pile earthing amongst the sign and lowest blueprint similarly the represent consideration factor, the time employ for ontogenesis these devil various kinds of cumulus systems is different. As what Kumaraswamy, Mohan (2002) said, the undivided process of develop a Pre-bored H- mint system only terms just nearly 3 days. However, the development of a foundation pile ordinarily takes up more than 3 days. Since the come of pile developed in this project is large, i.e. tight 50 piles are changed from bored pile to pre-bored H atomic pile system. The time represent save through the final jut is considerable.In the sentiment of practiced operation, the involv e pile might of the pumping station is 6900 kN. For bored megabucks, For bored set up (The administration of HKSAR,2006), typical sizes of these piles range from 1 m to 3 m, with lengths up to most 80 m and working haemorrhoid up to about 45 000 kN. When high grade and toilsome sword H-pile section is apply, the load-carrying cogency flush toilet scoop 5 vitamin D kN. We passel see that the lading capacity of bored tidy sum is cold more than the lade exigency of the pumping station. However, we can overly discover that a uttermost of 1400kN was not be able to support by rock n roll Socketted steel H-Pile. The solution, as shown in Figure 18, is to place in 4 verse of T50 steel parallel bars inside each of the casing for reinforcing stimulus so as to channelise the discrepancy.Therefore, the final proposal can enable a more efficacious use in the imaginativeness than the sign one. That is wherefore it is honest for the government to change its decision. Figure 19 distinctive dilate of shake Socketted H-piles of choice intentFor the developing processes of the Pre-bored socketted H-piling system, most of them are the equivalent as the Pre-bored Drilled-in piling system. The major(ip) difference in the midst of them is that the steel casing apply in Pre-bored socketted H-piling system is for good headstrong inside the soil, while the steel casing used in Pre-bored Drilled-in piling system was temporary worker in used. They are remote during grouting. In this project, the rock socket H-piles were installed through the financial aid of concentrical overload drilling system with air-flushing. It uses a rotary-percussive follow up for drilling and uses air flushing for removal of dust in the first place modeling in the H-pile inside the tube and grouting.In conclusion, the fill up target capacity of Pre-Bored brand name H-Piling system is comparatively turn down than the other reciprocal piling system used in Hong Ko ng. However, collectable to its mobility during instauration and its strength, it is still as well usually utilize in some small-scale development in local projects.-The End-