Oruka bit Eefin Forepoling Casing Advance

Forepoling, ti a tun mọ si agboorun tube, jẹ ohun elo ti a lo lati lokun orule oju eefin ni awọn ipo apata fifọ.Liluho eto oriširišicasingtubes eyi ti o ti gbẹ iho nipasẹ awọn overburden bi agboorun ati ki o kún pẹlu grouting.Eto Casing KAT ngbanilaaye wiwakọ irọrun ti awọn tubes casing sinu ilẹ pẹlu ibeere iyipo kekere.Ni igbalode forepoling tun fiberglass casings le ṣee lo fun olekenka-gun facebolts.

Awọn ọna Casing KAT ti a lo pupọ julọ ni iṣaju iwaju jẹ RoX+ 88,9/8, RoX 114,3/10 ati RoX 139,7/10.

Casing tubes

Ni deede opoplopo kan ni ọpọlọpọ awọn casings irin ti awọn mita 1,5 - 3

Asopọ nipasẹ o tẹle ara

Abẹrẹ falifu fun grouting

Awọn iwọn ila opin casing boṣewa: 88,9 – 114,3 – 139,7 – 168,3 mm

.Pilot Bits.Awọn apejọ oruka.Awọn Ọpa Lilu.Ibẹrẹ Casings.Awọn Casings itẹsiwaju.Grouting Plugs (awọn fila ipari) .Awọn oluyipada .Gouting falifu.Forepoling liluho Systems

koodu eto	Casing				Iwọn oruka				Pilot bit		Opo
	[mm]	[ninu]	[mm]	[ninu]	[mm]	[ninu]	[mm]	[ninu]	[mm]	[ninu]
RoX + 76,1/4	76.1	3	4	0.157	52	2.047	90	3.543	66	2.598	R32
RoX + 76,1/8	76.1	3	8	0.315	47	1.850	90	3.543	59	2.323	R32
RoX + 88,9/4	88.9	3½	4	0.157	71	2.795	99	3.898	80	3.150	T38
RoX + 88,9/8	88.9	3½	8	0.315	50.8	2.000	94.9	3.736	70	2.756	T38
RoX + 101,6/10	101.6	4	10	0.394	65	2.559	110	4.331	79	3.110	T38
RoX + 114,3/5	114.3	4½	5	0.197	91	3.583	128	5.039	102	4.016	T38
RoX 114,3/10	114.3	4½	10	0.394	73.5	2.894	120.30	4.736	92.5	3.642	T38
RoX 139,7/10	139.7	5½	10	0.394	94	3.701	145.70	5.736	117.5	4.626	T45
RoX + 159,0/10	159.0	6¼	10	0.394	119	4.685	169.0	6.654	137	5.394	T45
RoX + 168,3/10	168.3	6 ⅝	10	0.394	127	5.000	182.3	7.177	147	5.787	T45
RoX + 219,1/12,7	219.1	8 ⅝	127	0.500	167	6.575	234	9.213	191	7.520	T45
RoX + GFRP 76,1/8	76.1	3	8	0.315	47	1.850	90	3.543	59	2.323	R32
RoX + GFRP 76,1/8	76.1	3	8	0.315	47	1.850	90	3.543	59	2.323	T35