CN2298338Y

CN2298338Y - Drilling for construction in clayed layer large tube shed

Info

Publication number: CN2298338Y
Application number: CN 97250651
Authority: CN
Inventors: 于鼎拯
Original assignee: Railway Construction Research & Design Inst
Current assignee: Railway Construction Research & Design Inst
Priority date: 1997-08-14
Filing date: 1997-08-14
Publication date: 1998-11-25
Anticipated expiration: 2007-08-14

Abstract

The utility model relates to an impacting, hole extending, and pipe following drill for the construction of tunnels, etc. in a bad geology section, such as a clayed layer or a sand clayed stratum. The utility model uses the rotating torque provided by the existing turning driving head 9 and the impact work provided by an air impacting device 6 to together act on a cement plunger chip 1, and the mud around the bottom of the hole is extruded into holes. The utility model can prevent the collapse of the hole and drill freezing, and realizes the one-time accomplishment of relative processes in construction of drilling the hole, installing a casing tube, recovering the drill, etc. The utility model has the advantages of high construction speed, one to three times of hole forming work efficiency of a screw drill, high work efficiency, simple technique, low cost, and wide application. The utility model can be used for the construction in large tube shed of tunnels of clay and sand clay geology sections and underground construction, and can be used for other foundation strengthening construction of the same geology section.

Description

The drilling tool that the argillic horizon daguanpeng construction is used

The utility model relates to a kind of in Underground Engineering Excavation such as tunnel, and to clay or the sand clay bad geological section that often runs into, leading pre-supporting is reinforced, the impact reaming casing drilling tool that bassoon canopy bore operation is used.

At present, when excavation clay or sand clay stratum, leading pre-supporting is reinforced before the excavation, and the boring of bassoon canopy adopts soil anchor bolt machine or Saturn, full star rig to execute brill usually, and such drilling tool is essentially spiral drill.When spiral drill creeps into casting in clay or sand clay, soil bits under the hole subdrilling is cut are under the drilling rod screw action, soil bits to the aperture have compacted effect, thereby in deep well drilling, the soil bits that have been discharged to the aperture section easily by compacted, compress and wrap tightly and on auger stem, be difficult for discharging, cause rate of penetration slowly, inefficiency.

To be that design is a kind of reinforce in the bassoon canopy drilling construction in clay or sand clay layer leading pre-supporting the purpose of this utility model, the soil bits drilling cuttings under can because of casting freely by compacted, compress and wrap tightly drilling tool on drilling rod.

The purpose of this utility model realizes like this: design a kind of impact reaming casing drilling tool.This drilling tool utilize the rotation torque that existing revolution driving head provides and the air impactor that is connected in the drilling rod front portion, towards body be sleeved on body and can with the drift that separates towards body, realize impacting is main function, earth pore-forming around making at the bottom of the compacted hole of drift, can solve because the hole subdrilling is considered the soil bits that get off to be worth doing to wrap tightly on drilling rod, be difficult for discharging and cause slow, the inefficient problem of rate of penetration.The utility model, there is not the hole phenomenon of collapsing in follow-up when creeping into owing to conduit, becomes porosity can reach 100%; Because the hole subdrilling is considered the soil that gets off to be worth doing and considered to be worth doing by compacted pore-forming, speed of fulfiling hole is fast, and in clay or the construction of sand clay layer depth hole horizontal, the pore-forming work efficiency than the high 1-3 of Corkscrews drilling tool doubly especially; Owing to utilize existing revolution driving head that rotation torque is provided and it be configured on the existing rig, can a tractor serves several purposes, and do not influence the performance of former machine, original equipment cost is low.

Be that the utility model speed of fulfiling hole is fast, the work efficiency height becomes porosity can reach 100%, and technology is easy and reliable, the low and wide accommodation of construction cost: can be used for outside the argillic horizon bassoon canopy drilling construction, also be suitable for other basic reinforcing engineering construction of identical geology section.

Below in conjunction with embodiment and accompanying drawing thereof the utility model is described in further detail:

Fig. 1 the utility model structural representation

Fig. 2 spiral drill structural representation

Fig. 3 the utility model creeps into the status architecture schematic diagram

Fig. 4 the utility model moves back and bores the status architecture schematic diagram

The impact reaming that use on a kind of clay or sand stratum with pipe by cement drift 1, form towards body 2, shoe 3, guider 4, sleeve pipe 5, air impactor 6, drilling rod 7, drilling rod guiding coupling sleeve 8, drilling rod 7 one ends of this drilling tool utilize drilling rod guiding coupling sleeve 8, connect with existing revolution driving head 9 with corrugated thread, the other end connects an air impactor 6 with corrugated thread; Guider 4 two ends of garden cylindricality connect with air impactor 6 with towards body 2 with corrugated thread respectively, and the ring-shaped step cover of drift 1 is fitted in body 2 ring-shaped steps, and can freely separate; Have the helicla flute of getting rid of residual earth on the garden cylindricality guider 4, its ring-shaped step is pressed on the annular contact surface of shoe 3 simultaneously; Shoe 3 adopts welding to connect with sleeve pipe 5, and the interior inclined-plane of the conduit 5 that employing rectangle standard thread connects and the outer inclined-plane of guider 4 are with 45 ° inclined-planes contact; Revolution driving head 9 optional hydraulic power head or Vidacare corps.During construction, the utility model is configured on the propelling guide rail 10 of existing rig such as down-the-hole drill or drilling jumbo, revolution driving head 9 can be moved along the axial direction of drilling rod 7.Drift 1 adopts reinforced concrete precast member, partly is steel-casting with the garden post that contacts towards body 2.When advancing to bore, the ballistic work that air impactor 6 produces makes drift 1 impact anterior sun-dried mud brick, the sun-dried mud brick pore-forming of compacted drift 1 garden before week through guider 4, be delivered on the drift 1 towards body 2.The ring-shaped step of guider 4 is pressed on the ring-shaped step of shoe 3, when creeping into, follows up synchronously with cement drift 1 under the tractive of guider 4 at the percussion setting of casing 5 of air impactor 6.Waste gas after 6 works done of air impactor at the bottom of with the hole a spot of soil bits outside the spiral chute drain sleeve 5 of guider 4.

Move back when boring, air impactor 6 stops earlier impacting, and retreats, and advances the revolution driving head 9 on the guide rail 10, makes the body 2 that dashes at the bottom of the hole separate disengagement with drift 1, and drift 1 and sleeve pipe 5 are stayed in the hole, and all the other drilling tool returns withdraw from, and finish the task that applies in bassoon canopy hole.

Claims

1. the impact reaming casing drilling tool used of clay or sand stratum daguanpeng construction is characterized in that by drift (1), constitutes towards body (2), shoe (3), guider (4), sleeve pipe (5), air impactor (6), drilling rod (7), drilling rod guiding coupling sleeve (8); By drilling rod guiding coupling sleeve (8) drilling rod (7) and existing revolution driving head (9) are linked up, drilling rod (7) is anterior to be connected with air impactor (6), by guider (4) with air impactor (6) with link up towards body (2), the ring-shaped step cover of drift (1) is fitted in the another port ring-shaped step of body (2), and can freely withdraw from, the ring-shaped step of guider (4) is pressed on the ring-shaped step of shoe (3) simultaneously; Shoe (3) is welded together with conduit (5); Revolution driving head (9) is arranged on the propelling guide rail (10) of existing rig, and can move along the axial direction of drilling rod (7).

2. impact reaming casing drilling tool as claimed in claim 1 is characterized in that having on the guider (4) of garden cylindricality and gets rid of the helicla flute that residual earth is used, and its outer inclined-plane and the interior inclined-plane that is welded with the sleeve pipe (5) of shoe (3) contact with 45 ° inclined-planes.

3. impact reaming casing drilling tool as claimed in claim 1 is characterized in that adopting corrugated thread to connect in turn towards body (2), guider (4), air impactor (6), drilling rod (7), drilling rod guiding coupling sleeve (8) and revolution driving head (9); Adopt rectangular thread to connect between the sleeve pipe (5);

4. impact reaming casing drilling tool as claimed in claim 1 is characterized in that drift (1) adopts reinforced concrete precast member, and it partly is steel-casting with the garden post that contacts towards body (2).