Ring bit Tunnel Forepoling Casing Advance

Forepoling, ek wol bekend as buisparaplu, is in applikaasje dy't brûkt wurdt om tunneldak te fersterkjen yn brutsen rotsomstannichheden.Drilling systeem bestiet útcasingbuizen dy't as paraplu troch de oerlêst boarre wurde en fol mei grouting.KAT Casing System lit maklik riden fan de casing buizen yn 'e grûn mei lege koppel fraach.Yn moderne foarpoling kinne ek glêsfezelmantels brûkt wurde foar ultralange facebolts.

KAT Casing Systems meast brûkt yn forepoling binne RoX+ 88,9/8, RoX 114,3/10 en RoX 139,7/10.

Behuizing buizen

Typysk bestiet ien peal út ferskate stielen mantels fan 1,5 - 3 meter

Ferbining troch tried

Ynjeksje kleppen foar grouting

Standert behuizing diameters: 88,9 – 114,3 – 139,7 – 168,3 mm

.Pilot Bits.Ring Assemblies.Drill Rods.Starter Casings.Extension Casings.Grouting Plugs (end caps).Adapters.Grouting Valves.Forepoling Drilling Systems

Systeem koade	Behuizing				Ring bit				Pilot bit		Thread
	[mm]	[yn]	[mm]	[yn]	[mm]	[yn]	[mm]	[yn]	[mm]	[yn]
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	3 ½	4	0.157	71	2.795	99	3.898	80	3.150	T38
RoX+ 88,9/8	88,9	3 ½	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	4 ½	5	0.197	91	3.583	128	5.039	102	4.016	T38
RoX 114,3/10	114.3	4 ½	10	0.394	73,5	2.894	120.30	4.736	92,5	3.642	T38
RoX 139,7/10	139,7	5 ½	10	0.394	94	3.701	145,70	5.736	117,5	4.626	T45
RoX+ 159,0/10	159,0	6 ¼	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