CN105780759A - Construction method for deep bedrock diaphragm retaining wall - Google Patents
Construction method for deep bedrock diaphragm retaining wall Download PDFInfo
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- CN105780759A CN105780759A CN201610283153.0A CN201610283153A CN105780759A CN 105780759 A CN105780759 A CN 105780759A CN 201610283153 A CN201610283153 A CN 201610283153A CN 105780759 A CN105780759 A CN 105780759A
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- drill bit
- ajutage
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- groove
- basement rock
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 239000011435 rock Substances 0.000 claims abstract description 74
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 37
- 210000000078 claw Anatomy 0.000 claims description 29
- 239000000428 dust Substances 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 15
- 239000002002 slurry Substances 0.000 abstract description 9
- 239000000725 suspension Substances 0.000 abstract description 2
- 239000013049 sediment Substances 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 description 15
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 206010060904 Freezing phenomenon Diseases 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000007616 round robin method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a construction method for a deep bedrock diaphragm retaining wall. The construction method comprises the steps of fixing one end of an air supply pipe to a steel wire rope used for pulling a drill for drilling a groove in the bedrock, and connecting the other end of the air supply pipe with an air compressor; after fixing one end of the air supply pipe to the steel wire rope, drilling the bedrock through utilizing the drill to form the groove in the diaphragm retaining wall; during the process when the drill is utilized to drill the bedrock to form the groove, feeding slurry into the groove, and sending air into the groove through the air compressor and the air supply pipe, so that the drilling residue in the groove is enabled to float in the slurry; and continuously drilling the bedrock below the drilling residue through utilizing the drill while sending air into the groove through the air compressor and the air supply pipe. According to the method, during the process when the drill impacts a rock body to form the groove, the slurry circulates in the groove, the suspension capability of the slurry is improved, the problem that the drill repeatedly drills a sediment due to the situation that the drilling residue subsides at the hole bottom is prevented, the drilling efficiency is improved, and the hole drilling deflection is guaranteed.
Description
Technical field
The present invention relates to construction engineering technical field, particularly relate to a kind of method for the construction of deep basement rock ground-connecting-wall.
Background technology
In city foundation pit enclosure structure ground-connecting-wall is constructed, for deep basement rock grooving, generally by adding thin pulp or water in groove to dilute underflow, boring mud in suspension groove, after pore-creating terminates, carry out clear hole.One is owing to serosity suspending power is poor to adopt above-mentioned this mode to have a disadvantage in that, causes rig to repeat to creep into, and grooving efficiency is low；Two is the slurry that adds water in a large number, causes that useless slurry amount increases, and increases useless slurry intractability, is unfavorable for the environmental requirement of construction.
Summary of the invention
The purpose of the present invention is contemplated to solve the problems referred to above, a kind of method for the construction of deep basement rock ground-connecting-wall is provided, it is in the process of drill bit impact rock mass grooving, realize mud circulation in groove, improve the suspending power of serosity, prevent because the precipitate such as boring mud are making drill bit repeat to creep into precipitate at the bottom of hole, improve drilling efficiency, and can ensure that pore-creating hole deviation.
For realizing the above-mentioned purpose of the present invention, the present invention provides a kind of method for the construction of deep basement rock ground-connecting-wall, comprising:
Before deep basement rock is carried out ground-connecting-wall groove section excavation, one end of ajutage is fixed on the steel wire rope for drawing the drill bit that basement rock creeps into grooving, the other end of ajutage is connected with air compressor machine；
By fixing for one end of ajutage on a steel cord after, utilize drill bit that basement rock is crept into so that ground-connecting-wall grooving；
Drill bit is utilized basement rock to be crept in the process of grooving, continual supply mud in groove, and blown in groove by air compressor machine and ajutage, in order to the boring mud in groove is suspended in mud；
By air compressor machine and ajutage to while air-supply in groove, utilizing drill bit to be pointed to the basement rock below boring mud and continue to creep into, it is prevented that drill bit to boring mud repeat creep into.
Wherein, described ajutage is to be fixed on described steel wire rope by airduct leading truck, to prevent the ajutage when drill bit creeps into be wound around on a steel cord.
Preferably, described airduct leading truck includes: for being sleeved on the support body on described steel wire rope；It is arranged on outside support body and connected arc frame together；Wherein, described ajutage is set between described arc frame and described support body.
Wherein, described support body includes: U-tube；It is arranged at U-tube opening and the connecting rod removably connected with U-tube.
Wherein, described one end of described ajutage is positioned at described drill bit and the top of described steel wire rope junction.
Wherein, the bottom of described ajutage is placed in described airduct leading truck.
Preferably, described drill bit is friction-type drill bit.
Wherein, described friction-type drill bit includes the drill body of drillstock, the described drillstock bottom of connection, its top, and described drill body includes: its top connects the body of described drillstock bottom；It is arranged on multiple grinding subassemblies of described body bottom；Being arranged on the multiple discharge troughs for discharging rock dust on described body outer wall, the plasma discharge mouth of each of which discharge trough is adjacent with two grinding subassemblies in the plurality of grinding subassembly；It is arranged on the multiple arc bodies for closing off each grinding subassembly part of body bottom.
Preferably, described grinding subassembly includes: be arranged at a pair first grinding blocks of described body bottom；It is arranged at described body bottom and is positioned at the second grinding block inside a pair first grinding blocks；Wherein, described second grinding block and the pair of first grinding block are Y-shaped distribution.
Wherein, described body bottom portion has at least three claw, and each described grinding subassembly is placed on a claw.
Compared with prior art, the method for the construction of deep basement rock ground-connecting-wall of the embodiment of the present invention has the advantage that
1), the method for the present embodiment, steel wire rope for draw drill bit disposes ajutage, by ajutage to air-supply in groove formed by drill bit impact rock mass, make drill bit creep into and blow to carry out, thus realizing in groove mud at groove internal recycle simultaneously, improve the suspending power of serosity, prevent because the precipitate such as boring mud are making drill bit repeat to creep into precipitate at the bottom of hole, improve drilling efficiency, after pore-forming terminates, concentrate clear hole, reduce useless slurry discharge capacity, it is ensured that pore-creating hole deviation meets the requirements；
2), the method for the present embodiment, ajutage is fixed on steel wire rope by airduct fixed mount, effectively prevents when drill bit creeps into, phenomenon that ajutage is wrapped on drill bit, improves production safety and efficiency of construction；
3), the method for the present embodiment, adopt friction-type drill bit that rock mass is crept into grooving, it has multiple grinding subassembly, adopt the mode of flat surface grinding to deep basement rock trenching construction by multiple grinding subassemblies, increase the contact area between grinding subassembly and basement rock, make drill bit that the impulsive force of basement rock is uniform, the process of grinding pore-creating not easily occurs bit freezing phenomenon, there is the effect of pore-creating correction.
4), the friction-type drill bit of the present embodiment, favose free face can be formed between multiple grinding subassemblies and multiple arc body, crushing thus being beneficial to pore-forming when basement rock is crept into by drill bit, improving and creeping into work efficiency, accelerating construction progress；
5), the friction-type drill bit of the present embodiment, the reserved mouth of a river is left between the first grinding block and the second grinding block, and the reserved mouth of a river is connected with plasma discharge mouth, so that the rock dust even disintegrating slag of grinding block that are formed during drill bit grinding basement rock can be discharged in time without accumulating at the bottom of hole, thus without forming thicker precipitate at the bottom of hole, precipitate is repeated creeping into by impulsive force and the drill bit of avoiding precipitate cushioned drill bit, improves the work efficiency of creeping into of drill bit, improves construction speed；
6), the friction-type drill bit of the present embodiment, the lateral surface of a pair corresponding first grinding blocks is closed by arc body, and the external diameter of arc body is identical with the radius of corresponding claw, therefore, can ensure that when drill bit creeps into basement rock pore-creating, the edge in hole round and smooth and without teeth resistance, improve efficiency of construction when creeping into, reduce the unproductive time repairing hole, it is ensured that construction quality；
7), the friction-type drill bit of the present embodiment, each grinding block is made up of the high-strength alloy of wear and shock-resistant, will not falling slag easily when grinding basement rock or broken, drill bit is keeped in repair, boring is carried out deslagging, repaiied the unproductive time in hole by minimizing, improves and creeps into work efficiency.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is the front view of the friction-type drill bit of the embodiment of the present invention；
Fig. 2 is the upward view of friction-type drill bit shown in Fig. 1；
Fig. 3 is the structural representation that the airduct leading truck of the embodiment of the present invention is fixed on steel wire rope；
Fig. 4 is part A enlarged drawing in Fig. 3；
Fig. 5 is the airduct guide body structure schematic diagram (not shown connecting rod) of the embodiment of the present invention；
Fig. 6 be the present invention groove in the flow chart of mud round-robin method.
Detailed description of the invention
As shown in Figure 6, for the flow chart of the method for the construction of deep basement rock ground-connecting-wall provided by the invention, as seen from the figure, the method includes:
Before deep basement rock is carried out ground-connecting-wall groove section excavation, one end of ajutage is fixed on the steel wire rope for drawing the drill bit that basement rock creeps into grooving, the other end of ajutage is connected with air compressor machine；
By fixing for one end of ajutage on a steel cord after, utilize drill bit that basement rock is crept into so that ground-connecting-wall grooving；
Drill bit is utilized basement rock to be crept in the process of grooving, continual supply mud in groove, and blown in groove by air compressor machine and ajutage, in order to the boring mud in groove is suspended in mud；
By air compressor machine and ajutage to while air-supply in groove, utilizing drill bit to be pointed to the basement rock below boring mud and continue to creep into, it is prevented that drill bit to boring mud repeat creep into.
Concrete, as shown in Figure 6, in the groove of the present invention, mud round-robin method comprises the steps:
Step 1, deep basement rock is carried out ground-connecting-wall groove section excavation before, one end of ajutage is fixed on the steel wire rope for drawing the drill bit that basement rock creeps into grooving, the other end of ajutage is connected with air compressor machine, in order to the compression air that air compressor machine produces can pass through ajutage and send in groove.
Step 2, when by one end of ajutage fixing on a steel cord after, utilize drill bit to basement rock percussion drilling from top to bottom, in order to ground-connecting-wall grooving after pore-creating.
Step 3, when basement rock is crept into grooving by drill bit, basement rock is made to be ground into the boring mud of substantial amounts of rock dust class, therefore, along with basement rock is crept into grooving by drill bit, by the method for prior art to formed groove in continual supply mud, simultaneously, blown in groove by air compressor machine and ajutage, in order to blow the mud in groove and boring mud by compressing air so that mud is suspended in mud at groove internal recycle, boring mud, that is, mud and boring mud will not be deposited at the bottom of hole.
Step 4, by air compressor machine and ajutage to while air-supply in groove, drill bit is pointed to the rock mass below boring mud to be continued to creep into, boring mud owing to being formed when drill bit early stage creeps into basement rock is suspended in mud and is not deposited at the bottom of hole, therefore, when drill bit continues the rock mass of lower section is crept into, the bottom of drill bit can be passed boring mud and directly contact rock mass, thus will not the boring mud that early stage is formed being crept into when continuing to creep into, effectively prevent drill bit and sedimentary repetitions the such as boring mud are crept into.
Wherein, in above-mentioned steps 2, one end of ajutage is fixed on a steel cord, it is by one end of ajutage being fed through airduct leading truck, again by fixing for airduct leading truck method on a steel cord, thus effectively prevent when drill bit creeps into, ajutage is wound around phenomenon on a steel cord, improves production safety and efficiency of construction.
As shown in Figure 3, the airduct leading truck 14 provided for the embodiment of the present invention is placed in for drawing the structural representation on the steel wire rope 11 of drill bit of drilling machine 12, Fig. 4 is the part A enlarged drawing shown in Fig. 3, from Fig. 3, Fig. 4, steel wire rope 11 bottom be fed through the hanger for lifting drill bit backward on turn back formation back-turning section, and the vertical section not being fed through hanger of back-turning section and steel wire rope is parallel, utilize multiple buckle 13 disposed up and down back-turning section and the vertical section of steel wire rope to be locked, and airduct leading truck 14 is sleeved on outside back-turning section and vertical section.
Concrete, as shown in Figure 4, Figure 5, the airduct leading truck 14 that the embodiment of the present invention provides includes: for being sleeved on for drawing the support body on the steel wire rope 11 of drill bit；It is arranged on outside support body and connected arc frame 18 together；Wherein, ajutage 19 is set between arc frame 18 and support body.
Wherein, support body includes: for being sleeved on the U-tube 15 outside the back-turning section of steel wire rope 11 and vertical section；The opening being arranged at U-tube 15 and the connecting rod 17 removably connected with U-tube 15, outside being fixedly mounted on back-turning section and the vertical section of steel wire rope by described U-tube 15.Preferably, the end at project in parallel out two cantilever arms of U-tube 15 is respectively provided with the collar, and the two ends of connecting rod 17 are fed through the collar of correspondence respectively, are separately fixed on the collar at the two ends of connecting rod 17 again through a pair nut 16.It is of course also possible to the end at two cantilever arms of U-tube 15 is respectively provided with through hole, and the two ends of connecting rod 17 are fed through a pair through hole respectively, are then separately fixed on cantilever arm at the two ends of connecting rod 17 again through a pair nut.
And arc frame 18 is close, with the curved portions of U-tube 15, the fixed mount that the part being connected is curved, ajutage 19 is set between the curved portions of arc frame 18 and U-tube 15, i.e. ajutage 19 and steel wire rope 11 be arranged in parallel.During design, the radius radius slightly larger than ajutage 19 of arc frame 18 should be made, in order to ajutage 19 slightly gap after being fed through arc frame 18 and between arc frame 18 so that ajutage 19 can rotate in arc frame 18.And in order to prevent ajutage 19 from deviating from arc frame 18, the bottom of ajutage 19 can arrange a pair annular solid protruding from ajutage 19 outer wall, the radius of a pair annular solid is all higher than the radius of arc frame 18, and arc frame 18 is between a pair annular solid, so that ajutage 19 not only can move up and down along with steel wire rope under the effect of airduct leading truck 14, but also can rotate relative to airduct leading truck 14.Namely, ajutage 19 can move up and down along with the drill bit of rope traction, and when bit, ajutage 19 along with bit, will effectively prevent ajutage 19 to be wound around on a steel cord, in addition, creep in the process of basement rock at drill bit, the position of the relative drill end in ajutage 19 bottom remains unchanged so that the air-supply effect of ajutage 19 is always maintained at constant, also avoids ajutage to be wrapped on drill bit.
Wherein, in step 2, when one end of ajutage 19 is fixed on steel wire rope 11, described one end (i.e. the bottom of ajutage 11) of ajutage 11 is positioned at the top (as shown in Figure 3) of drill bit and steel wire rope 11 junction, and the bottom of ajutage 19 is placed in airduct leading truck 14.Drawn by great many of experiments, ajutage 19 bottom from the distance of drill end be 1.2-1.8m time, best results of blowing.
The present invention is by the drill bit airduct leading truck for being set with ajutage installed above, ajutage is prevented to be wrapped on drill bit, and by blowing while creeping at drill bit, it is possible to effectively prevent boring mud etc. to be deposited at the bottom of hole, avoid drill bit to repeat to creep into boring mud, improve drilling efficiency.
Wherein, the drill bit for creeping into basement rock of the present invention can adopt friction-type drill bit.
As it is shown in figure 1, the front view of the friction-type drill bit provided for the embodiment of the present invention, Fig. 2 is the upward view of friction-type drill bit shown in Fig. 1.As seen from Figure 1, Figure 2, the friction-type drill bit that the embodiment of the present invention provides includes the drillstock 1 for connecting with rig, its top connects the drill body 2 of drillstock 1 bottom, and wherein, drill body 2 includes: the body 3 of connection drillstock 1 bottom, its top；It is arranged on multiple grinding subassemblies of body 3 bottom；Being arranged on the multiple discharge troughs 4 for discharging rock dust on body 3 outer wall, the plasma discharge mouth of each of which discharge trough 4 is adjacent with two grinding subassemblies in multiple grinding subassemblies；It is arranged on the multiple arc bodies 6 for closing off each grinding subassembly part of body 3 bottom.
It should be noted that deep basement rock herein refers to that hardness is up to 132MPa, cover layer is several meters and depth of stratum reaches the geology of 20-40 rice.
Concrete, as shown in Figure 1 and Figure 2, the body 3 of the present embodiment friction-type drill bit is in up-narrow and down-wide taper, uniform in the bottom of body 3 multiple grinding subassembly be set (grinding subassembly can be 2,3,4 or more, figure only shows 4 grinding subassemblies), adopt the mode of flat surface grinding to deep basement rock trenching construction by multiple grinding subassemblies, increase the contact area between grinding subassembly and basement rock, make drill bit that the impulsive force of basement rock is uniform, the process of grinding pore-creating not easily occurs bit freezing phenomenon, there is the effect of pore-creating correction.Outer wall at body 3 is offered along its axially extended multiple discharge troughs 4, and the rock dust formed during by discharge trough 4 by grinding subassembly grinding basement rock is discharged, in order to improves and creeps into work efficiency, reduces the abrasion to grinding subassembly.Multiple arc body 6 (quantity of arc body 6 is identical with the quantity of grinding subassembly) is set in body 3 bottom, a grinding subassembly part is closed by each arc body 6, honeycomb free face can be formed between multiple grinding subassemblies and corresponding multiple arc bodies, it is beneficial to pore-forming when basement rock is crept into and crushes.
Wherein, having multiple claw bottom body 3, the quantity of claw can be 2,3,4 or more, during design, the quantity of claw is identical with the quantity of grinding subassembly, arc body, and position relationship each other is also identical, and determines the quantity of claw according to the concrete condition constructed.Multiple discharge troughs 4 are respectively arranged between the claw that each two is adjacent.Below, only for the structure of the friction-type drill bit with 4 claws as shown in Figure 2, the structure of the friction-type drill bit of the present invention is described in detail.
As in figure 2 it is shown, the friction-type drill bit of the present embodiment has 4 claws, each claw disposing a grinding subassembly and an arc body 6, arc body is arranged at the edge of corresponding claw.Wherein, grinding subassembly on each claw includes: be arranged at a pair first grinding blocks 5 of body 3 bottom (i.e. claw bottom), it is arranged at body 3 bottom (i.e. claw bottom) and is positioned at the second grinding block 7 inside a pair first grinding blocks 5, second grinding block 7 and a pair first grinding blocks 5 distributions in Y-shaped so that formed between the second grinding block 7 and a pair first grinding blocks 5 be beneficial to pore-forming broken face dead slot.Preferably, the reserved mouth of a river 8 is left between lateral surface and the medial surface of a pair first grinding blocks 5 of the second grinding block 7, so that the rock dust formed during grinding block grinding basement rock flows to the plasma discharge mouth of discharge trough 4 from the reserved mouth of a river 8, and discharge via discharge trough 4, the rock dust even disintegrating slag of grinding block is avoided to accumulate at the bottom of hole, it is difficult to float in hole and discharge, make to be formed at the bottom of hole thicker precipitate, and precipitate has cushioned the impulsive force of drill bit, drill bit is made to be repeated creeping into precipitate, thus that reduces drill bit creeps into work efficiency, affect construction speed.
Preferably, the lateral surface of each claw of body 3 is curved, and the external diameter of the arc body 6 on claw is equal to the radius of claw, i.e. arc body 6 being axially placed in bottom claw and extending down along body 3.Wherein, the medial surface of the arc body 6 on each claw contacts respectively with the lateral surface of a pair first grinding blocks 5 on this claw, in order to arc body 6 closes a pair first grinding blocks 5.During design, the height of arc body 6 can less than the height of grinding block (height herein refers to the height that arc body 6 and each grinding block extend down from body bottom along body axial direction).
Owing to the lateral surface of a pair first grinding blocks 5 is closed by the arc body 6 on claw, and the external diameter of arc body 6 is identical with the radius of corresponding claw, therefore, it can be ensured that when drill bit creeps into basement rock pore-creating, the edge in hole round and smooth and without teeth resistance, thus improving efficiency of construction when creeping into.
Due to the arc body 6 on each claw, between a pair first grinding blocks 5 and the second grinding block 7, forming dead slot so that between multiple grinding subassemblies and the multiple arc body 6 on multiple claws, favose free face can be formed, crushing thus being beneficial to pore-forming.
Wherein, the discharge trough arranged between adjacent claw extends up and down along body axially direction, and the plasma discharge mouth of the discharge trough opening being positioned at body bottom of discharge trough (the plasma discharge mouth refer to) is in circular arc and recessed towards the center position of body bottom.During design, the radius of plasma discharge mouth is more than the radius of discharge trough other parts, i.e. discharge trough extends after being tilted upward an extension part by plasma discharge mouth more straight up.
Wherein, first grinding block 5 of the present embodiment and the second grinding block 7 respectively one bar seamed edge triangular prism (as shown in Figure 2) down, this seamed edge becomes the grinding sword of grinding block, and the faceted pebble corresponding with this seamed edge is fixedly mounted on body bottom, as each grinding face being welded on by the mode of welding the bottom of body.
Preferably, first grinding block 5 and the second grinding block 7 are made by high-strength alloy, the high-strength alloy making grinding block can adopt having of prior art high strength cemented carbide steel wear-resisting, resistance to impact one-tenth to make, and preferably yield strength is not less than 800MPa, as YG3X tungsten steel alloy can be adopted to make.And arc body can adopt the material identical with grinding block to make, it is possible to adopt other material with high intensity to make, as, high-strength spring or semiaxis is adopted to make, and it is fixed on the edge of body by the mode welded, together with each grinding block, it is achieved tunneling boring forms high intensity rubbing surface.
In addition, the present embodiment is at drill body 2 (as shown in Figure 1) or arranges hanger 9 on other parts connect rig, by wearing the steel wire rope for drawing drill bit in hanger 9, it is prevented that the friction-type drill bit of the present invention when basement rock is carried out high speed impact, drill bit falls to bore the generation of situation.
Certainly, the drill bit of the present invention can also adopt the drill bit such as cross bit of prior art, but compare through site operation, hardness is up to 132MPa by the friction-type drill bit adopting the present embodiment, depth of stratum reaches the rock mass of 20-40 rice when carrying out pore-creating grooving, the cross bit of the comparable prior art of drilling efficiency is enhanced about more than once, greatly ensure that construction safety, it is ensured that construction quality, accelerate project progress.
In sum, compared with prior art, the method for the construction of deep basement rock ground-connecting-wall of the embodiment of the present invention has the advantage that
1), the method for the present embodiment, steel wire rope for draw drill bit disposes ajutage, by ajutage to air-supply in groove formed by drill bit impact rock mass, make drill bit creep into and blow to carry out, thus realizing in groove mud at groove internal recycle simultaneously, improve the suspending power of serosity, prevent because the precipitate such as boring mud are making drill bit repeat to creep into precipitate at the bottom of hole, improve drilling efficiency, after pore-forming terminates, concentrate clear hole, reduce useless slurry discharge capacity, it is ensured that pore-creating hole deviation meets the requirements；
2), the method for the present embodiment, ajutage is fixed on steel wire rope by airduct fixed mount, effectively prevents when drill bit creeps into, phenomenon that ajutage is wrapped on drill bit, improves production safety and efficiency of construction；
3), the method for the present embodiment, adopt friction-type drill bit, it has multiple grinding subassembly, adopt the mode of flat surface grinding to deep basement rock trenching construction by multiple grinding subassemblies, increase the contact area between grinding subassembly and basement rock, make drill bit that the impulsive force of basement rock is uniform, the process of grinding pore-creating not easily occurs bit freezing phenomenon, there is the effect of pore-creating correction.
4), the friction-type drill bit of the present embodiment, favose free face can be formed between multiple grinding subassemblies and multiple arc body, crushing thus being beneficial to pore-forming when basement rock is crept into by drill bit, improving and creeping into work efficiency, accelerating construction progress；
5), the friction-type drill bit of the present embodiment, the reserved mouth of a river is left between the first grinding block and the second grinding block, and the reserved mouth of a river is connected with plasma discharge mouth, so that the rock dust even disintegrating slag of grinding block that are formed during drill bit grinding basement rock can be discharged in time without accumulating at the bottom of hole, thus without forming thicker precipitate at the bottom of hole, precipitate is repeated creeping into by impulsive force and the drill bit of avoiding precipitate cushioned drill bit, improves the work efficiency of creeping into of drill bit, improves construction speed；
6), the friction-type drill bit of the present embodiment, the lateral surface of a pair corresponding first grinding blocks is closed by arc body, and the external diameter of arc body is identical with the radius of corresponding claw, therefore, can ensure that when drill bit creeps into basement rock pore-creating, the edge in hole round and smooth and without teeth resistance, improve efficiency of construction when creeping into, reduce the unproductive time repairing hole, it is ensured that construction quality；
7), the friction-type drill bit of the present embodiment, each grinding block is made up of the high-strength alloy of wear and shock-resistant, will not falling slag easily when grinding basement rock or broken, drill bit is keeped in repair, boring is carried out deslagging, repaiied the unproductive time in hole by minimizing, improves and creeps into work efficiency.
Although above the embodiment of the present invention being explained in detail; but the embodiment of the present invention is not limited to this; those skilled in the art can principle according to embodiments of the present invention modify; therefore, the various amendments that all principles according to the embodiment of the present invention carry out all should be understood to fall into the protection domain of the embodiment of the present invention.
Claims (10)
1. the method for the construction of deep basement rock ground-connecting-wall, it is characterised in that including:
Before deep basement rock is carried out ground-connecting-wall groove section excavation, one end of ajutage is fixed on the steel wire rope for drawing the drill bit that basement rock creeps into grooving, the other end of ajutage is connected with air compressor machine；
By fixing for one end of ajutage on a steel cord after, utilize drill bit that basement rock is crept into so that ground-connecting-wall grooving；
Drill bit is utilized basement rock to be crept in the process of grooving, continual supply mud in groove, and blown in groove by air compressor machine and ajutage, in order to the boring mud in groove is suspended in mud；
By air compressor machine and ajutage to while air-supply in groove, utilizing drill bit to be pointed to the basement rock below boring mud and continue to creep into, it is prevented that drill bit to boring mud repeat creep into.
2. method according to claim 1, it is characterised in that described ajutage is to be fixed on described steel wire rope by airduct leading truck, to prevent the ajutage when drill bit creeps into be wound around on a steel cord.
3. method according to claim 2, it is characterised in that described airduct leading truck includes:
For being sleeved on the support body on described steel wire rope；
It is arranged on outside support body and connected arc frame together；
Wherein, described ajutage is set between described arc frame and described support body.
4. method according to claim 3, it is characterised in that described support body includes:
U-tube；
It is arranged at U-tube opening and the connecting rod removably connected with U-tube.
5. the method according to any one of claim 1-4, it is characterised in that described one end of described ajutage is positioned at described drill bit and the top of described steel wire rope junction.
6. the method according to any one of claim 2-4, it is characterised in that the bottom of described ajutage is placed in described airduct leading truck.
7. method according to claim 1, it is characterised in that described drill bit is friction-type drill bit.
8. method according to claim 7, it is characterised in that described friction-type drill bit includes the drill body of drillstock, the described drillstock bottom of connection, its top, and described drill body includes:
Its top connects the body of described drillstock bottom；
It is arranged on multiple grinding subassemblies of described body bottom；
Being arranged on the multiple discharge troughs for discharging rock dust on described body outer wall, the plasma discharge mouth of each of which discharge trough is adjacent with two grinding subassemblies in the plurality of grinding subassembly；
It is arranged on the multiple arc bodies for closing off each grinding subassembly part of body bottom.
9. method according to claim 8, it is characterised in that described grinding subassembly includes:
It is arranged at a pair first grinding blocks of described body bottom；
It is arranged at described body bottom and is positioned at the second grinding block inside a pair first grinding blocks；
Wherein, described second grinding block and the pair of first grinding block are Y-shaped distribution.
10. method according to claim 9, it is characterised in that described body bottom portion has at least three claw, and each described grinding subassembly is placed on a claw.
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| CN201610283153.0A CN105780759B (en) | 2016-04-28 | 2016-04-28 | Method for the construction of deep basement rock ground-connecting-wall |
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| CN201610283153.0A CN105780759B (en) | 2016-04-28 | 2016-04-28 | Method for the construction of deep basement rock ground-connecting-wall |
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| CN105780759B CN105780759B (en) | 2018-10-19 |
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| CN87102552A (en) * | 1987-04-04 | 1988-09-21 | 交通部第一航务工程勘察设计院 | Device for guiding tube reverse-circulation grooving method of underground continuous wall |
| CN201254426Y (en) * | 2008-08-14 | 2009-06-10 | 中海石油金洲管道有限公司 | Sire rope safe separation device for lifting equipment |
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| CN105780759B (en) | 2018-10-19 |
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