CN207377563U - The shaft wall structure and constructing device of the high spray curtain pile of shaft collar section - Google Patents
The shaft wall structure and constructing device of the high spray curtain pile of shaft collar section Download PDFInfo
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- CN207377563U CN207377563U CN201720905872.1U CN201720905872U CN207377563U CN 207377563 U CN207377563 U CN 207377563U CN 201720905872 U CN201720905872 U CN 201720905872U CN 207377563 U CN207377563 U CN 207377563U
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Abstract
The shaft wall structure of the high spray curtain pile of shaft collar section is related to the Mine Shaft Lining of poor strata, it is included in the vertical that thick aqueous backfill topsoil is set, feature is, using wellbore centre line as the center of circle, the high spray curtain wall of circular ring shape of three circles head and the tail closing is at least set along pit shaft famine radial line periphery, 800~1000mm of thickness of height spray curtain wall, depth are more than the thickness of thick aqueous backfill topsoil.Constructing device, the successively high spray drilling of first, the three, the second circle of construction, high spray curtain wall, then pour the reinforced concrete borehole wall are set.Advantage be it is novel, it is simple in structure, it is reliable and stable, the borehole wall is escorted using height spray curtain wall, enhances bearing capacity and non-deformability, water plugging effect is good；Construction is quick, convenient, can realize pit shaft speed excavation and masonry, save money, it is ensured that mining production is smoothed out.
Description
Technical field：
The utility model belongs to the Mine Shaft Lining and constructing device of mine vertical shaft construction more particularly to poor strata.
Background technology
Underground mining, vertical are important promotion, ventilation, transport, draining and the personnel safety passage for contacting underground and earth's surface,
Preliminary shaft is the part that upper wellbore is connected directly with earth's surface, directly bears the whole load that pit shaft promotes facility.Therefore, vertical well
Neck structure must have enough bearing capacity and non-deformability.With the rapid development of global mining industry, shared by underground mining
Ratio it is increasing, vertical is increasingly deeper, the stratum that passes through becomes increasingly complex.It especially backfills topsoil and forms complicated, table
Soil is clay layer or is that clay mixes layer with rubble, ore, and the soil body is in fluffy, and irregular, uneven, compactness is low, and distribution is big
Metering-orifice gap, intensity are low, low bearing capacity, water penetration are strong, aqueous with there is stronger mobility under pressure water or the effect of power water,
The disasters such as pit shaft water burst and the differential settlement on earth's surface well head basis is easily caused to occur, damage pit shaft facility or casualties,
Production is seriously affected to be smoothed out.
The conventional method of disposal of thick aqueous backfill topsoil is soil replacement method or freezing where shaft collar.Soil replacement method is reinforced
Structure all excavates thick aqueous backfill topsoil, pours shaft wall structure first, then back-filling in layers homogeneous soil again, existing defects
It is：Earth's surface excavation area is big, is restricted by existing building around, it is difficult to carry out large area excavation；Back-filling in layers homogeneous geotechnique
Phase is long, and cost is high.Freezing ruggedized construction is then to bore a circle or two circle freezing holes to stablizing rock stratum or wellbore bottom from earth's surface
10m~20m, complete opening, which is set, in freezing hole freezes steel pipe, arranges refrigeration station in earth's surface, is cycled refrigerating fluid by freezing steel pipe
Freezing hole bottom is delivered to, so as to reach freezing shaft whole body country rock, achievees the purpose that water-impervious reinforces country rock, existing defects are：
Refrigeration system equipment is long in time limit, cost is high, power consumption is big.Practice have shown that above two method all there are it is long in time limit, cost is high, sternly
Ghost image rings the defects of production.It is extremely urgent to seek more rational well shaft wall structure.
The content of the invention
The defects of in order to overcome the prior art, the object of the present invention is to provide a kind of wells of the high spray curtain pile of shaft collar section
Wall construction, constructing device and method, simple in structure, stable, reliable, construction quickly, can guarantee the stability of shaft collar.
The shaft wall structure of the high spray curtain pile of shaft collar section is included in the vertical that thick aqueous backfill topsoil is set, in well
Rock stratum is excavated in the waste radial line of cylinder, the borehole wall is poured between the net radial line of pit shaft and pit shaft famine radial line, its main feature is that, with wellbore centre line
For the center of circle, at least set the circular ring shape of three circles head and the tail closing is high to spray curtain wall along pit shaft famine radial line periphery, outside pit shaft famine radial line
0.6m sets the high spray curtain wall of first lap, and 1.2~2m sets the high spray curtain wall of the second circle outside the high spray curtain wall of first lap, the
The high spray curtain wall of the 3rd circle of 1.2~2m settings outside the high spray curtain wall of two circles, and so on, the borehole wall is escorted, enhancing bearing capacity resists
Deformability and waterproof ability；800~1000mm of thickness of the high spray curtain wall, depth are more than thick aqueous backfill topsoil
Thickness；Injection pressure water hole is set in the pit shaft, carries out injection pressure water test, Gao Pen curtain walls area sets coring drilling, and coring is sentenced
Disconnected wall quality；The borehole wall is made of inner and outer wall, and outer wall is the armored concrete not less than 300mm thickness, and inner wall is
Not less than the armored concrete of 600mm thickness.
It is further improved, the high spray curtain wall is connected and composed by the high spray curtain pile on same circle, the high spray
Curtain pile is to be frozen into cylindric pile body by cement mortar spray to default high spray drilling using three pipe High-pressure Spiral Spray Technologies,
The pile body and pile body of same circle are overlapped to connect into the high spray curtain wall of a circular ring shape.
It is further improved, the high spray drilling, is vertically to be drilled to down from ground using drilling machine, depth is more than thick aqueous
Thickness of surface soil is backfilled, bore diameter is not less than 130mm, and spacing is not more than 0.9m between two drillings；The cement mortar spray
Enter high spray drilling and expand to periphery, expanded diameter is 800mm~1000mm, is had between stake and stake overlapping not less than 100mm
Bonding pad.
It is further improved, coring drilling is symmetrical arranged in Gao Pen curtain walls area for two, using drilling machine from ground
Face is vertically drilled to down, and depth is more than high spray curtain pile depth 5m, bore diameter 91mm, judges high spray matter according to the core of taking-up
Amount.
It is further improved, the injection pressure water hole is at least one, is set in the net radial line of pit shaft, is hung down using drilling machine from ground
It is directly drilled to down, depth is more than high spray curtain pile depth 5m, bore diameter 168mm, and pressure injection water test is carried out to drilling, checks high
Spray curtain wall water plugging effect.
It is further improved, the outer wall concrete grade is not less than C30, and double steel bar, principal rod are arranged in concrete
Diameter is not less than 20mm, is arranged along pit shaft periphery, spacing 300mm；Branch's muscle diameter is not less than 20mm, along wellbore centre line direction
Arrangement, spacing 300mm.
It is further improved, the internal-wall concrete label is not less than C30, and individual layer reinforcing bar, principal rod are arranged in concrete
Diameter is not less than 20mm, is arranged along pit shaft periphery, spacing 300mm；Branch's muscle diameter is not less than 20mm, along wellbore centre line direction
Arrangement, spacing 300mm.
Also provide it is a kind of it is high spray curtain pile shaft lining structural construction device, its main feature is that the device include cementing tank, water tank,
Level-one agitator, two level agitator, operation console, high-pressure injection pump, high-pressure hydraulic pump, air compressor machine, drilling machine and high spray booth vehicle are formed, just
It is near to be located above near wellbore or pit shaft；The cementing tank, water tank are connected respectively by cement elephant trunk, water pipe and level-one agitator
It connects, level-one agitator is connected with two level agitator by mud tube, and two level agitator is connected with high-pressure injection pump by cement mortar pipe, high
Pressure injection stock pump, high-pressure hydraulic pump, air compressor machine are connected respectively by slip casting high-voltage tube, high-pressure water pipe, high-pressure air hose with high spray booth vehicle；It is described
Cementing tank, water tank, level-one agitator, two level agitator, high-pressure injection pump, high-pressure hydraulic pump, air compressor machine, drilling machine, high spray booth vehicle
It is electrically connected by control cable and operation console.
A kind of shaft lining structural construction method of the high spray curtain pile of shaft collar section is also provided, is carried out as follows：
1st, shaft collar section construction line calibration
(1), wellbore centre point is calibrated in earth's surface according to design coordinate, it is only straight according to the pit shaft of wellbore centre point and design
Footpath and lining thickness calibrate the net radial line of pit shaft and waste radial line；
(2), 0.6m arranges the high spray curtain pile drilling of first lap arrangement outside pit shaft famine radial line, and spacing is little between two drillings
In 0.9m；
(3), the high spray curtain pile drilling of the second circle is arranged again outside the high spray curtain pile of first lap, spacing is little between two drillings
In 0.9m, the circle remote of the second circle and first lap is not more than 1.2m；
(4), the high spray curtain pile drilling of the 3rd circle is arranged again outside the high spray curtain pile of the second circle, spacing is little between two drillings
In 0.9m, the circle remote of the 3rd circle and the second circle is not more than 1.2m；
The 2nd, constructing device is set by cementing tank, water tank, level-one agitator, two level agitator, high-pressure injection pump, high pressure water
Pump, air compressor machine, slip casting high-voltage tube, high-pressure water pipe, high-pressure air hose, drilling machine, high spray booth vehicle and operation console are located near wellbore nearby
Or above pit shaft, and relevant device is attached successively；
3rd, the high spray curtain pile boring drill interval drilling of first lap of constructing, every one hole of a hole drill, depth is more than thick aqueous
Thickness of surface soil is backfilled, bore diameter is not less than 130mm, and hole position deviation is not more than 1% no more than 2cm, hole deviation rate；
4th, the high spray curtain wall of high-pressure rotary-spray first lap is every hole spray
(1), design proportion is pressed in slurrying, releases quantitative cement in cementing tank by cement elephant trunk, by water pipe from water
Quantitative water is released in case and is sent to the level-one agitator with homogenizer, after mixing time is not less than 30s, by what is prepared
Cement grout is put by cement mortar pipe with mixing slowly in the two level mixing drum of machine, is slowly stirred；
(2), the cement grout in high-pressure delivery two level mixing drum is connected to high-pressure injection pump, high pressure injection by cement mortar pipe
Cement grout in two level mixing drum is transported to the drilling rod of high spray booth vehicle by stock pump by high-pressure slip-casting pipe, will using high-pressure hydraulic pump
Water is transported to the drilling rod of high spray booth vehicle by high-pressure water pipe, and air is transported to high spray booth vehicle by high-pressure air hose using air compressor machine
Drilling rod；
(3) high pressure jetting sprays drilling hole bottom by supreme under the drilling rod of high spray booth vehicle, and operation console is by controlling cable connection extremely
High-pressure grouting pump, high-pressure hydraulic pump and air compressor machine；Start-up operation platform is sent into satisfactory slurry, gas and water, the ratio of cement mortar
Again not less than 1.5, pressure is 0.2~1.0Mpa, and water flow is 55~70L/min；The pressure of high pressure water is 34~38Mpa, stream
It measures as 60~80L/min；The pressure of compressed air is 0.6~0.8Mpa, flow is 0.8~1.2m3/ min, treats cement grout
Emerge aperture when, by design hoisting way and promote speed and promote drilling rod from bottom to top, until the whole spray promoted to design is high
Journey stop-spraying, cement grout are frozen into cylindrical concrete stake；Then spray is carried out to the drilling between two again to build, form stake stake part
It is overlapped the high spray curtain wall being connected；
5th, by the high spray curtain pile drilling of the 3rd circle of step 3 construction；
6th, high spray curtain wall is enclosed by step 4 high-pressure rotary-spray the 3rd；
7th, by the high spray curtain pile drilling of the second circle of step 3 construction；
8th, high spray curtain wall is enclosed by step 4 high-pressure rotary-spray second；
9th, high spray quality inspection
The wellbore centre symmetric position in high spray curtain wall reinforcing scope between first lap and the 3rd circle randomly chooses
Two positions, construction coring drilling, are drilled to down using drilling machine from ground, and depth is more than high spray curtain pile depth 5m, and drilling is straight
Footpath 91mm judges high spray quality according to the core of taking-up；Construction finishes, the boring cement mortar complete opening closure of two corings；
10th, pressure injection water test
A position is randomly choosed in the net radial line of pit shaft as pressure injection water hole, is drilled to down from ground using drilling machine, deeply
Degree is more than high spray curtain pile depth 5m, bore diameter 168mm, and pressure injection water test is carried out to drilling, checks high spray curtain wall water blockoff
Effect；After pressure injection water test, the pressure injection water hole cement mortar complete opening that construction finishes is blocked；
11st, pit shaft preliminary shaft section outer wall is poured
Pit shaft, casting concrete, each cutting depth are gradually excavated from top to bottom in the range of the waste radial line of pit shaft design
No more than 2m, preliminary shaft outer wall armored concrete is then poured, until preliminary shaft bottom；Concrete thickness is not less than 300mm, and label is not
Less than C30, double steel bar is arranged in concrete, principal rod diameter is not less than 20mm, is arranged along pit shaft periphery, spacing 300mm；
Branch's muscle diameter is not less than 20mm, is arranged along wellbore centre line direction spacing 300mm；
12 pour pit shaft preliminary shaft section inner wall
From preliminary shaft bottom continuous placing preliminary shaft inner wall armored concrete from bottom to top, until well head earth's surface, concrete thickness
Not less than 600mm, label is not less than C30；Arrangement double steel bar in concrete, principal rod diameter are not less than 20mm, along pit shaft week
Side arranges that spacing thickness is not less than 300mm 300mm；Branch's muscle diameter is not less than 20mm, along wellbore centre line direction spacing
300mm is arranged；
13rd, Demolition Construction device, construction terminate.
Compared with prior art, advantage is novel, simple in structure, reliable and stable, and well is escorted using height spray curtain wall
Wall, enhances bearing capacity and non-deformability, water plugging effect are good；Construction is quick, convenient, can realize pit shaft speed excavation and masonry, saves
Expense, it is ensured that the safe and smooth progress of mining production.
Description of the drawings
Below against attached drawing, the utility model is described in further detail.
The shaft wall structure schematic diagram of the high spray curtain wall of Fig. 1 shaft collars section.
Fig. 2 is high spray curtain wall shaft collar structure A-A sectional schematic diagrams.
Fig. 3 high spray drilling arrangement schematic diagrames.
The high spray curtain wall borehole wall of Fig. 4 shaft collars section applies constructing device configuration schematic diagram.
In figure：1st, the net radial line 3 of shaft of vertical well 1.1, wellbore centre line 2, pit shaft, pit shaft famine radial line 4, outer wall 5, interior
The high spray curtain of high high the 9, second circle of spray curtain pile drilling of the 8, the 3rd circle of spray curtain pile drilling of wall 6, backfill topsoil 7, first lap
Curtain stake drilling 10, the high spray curtain wall 13 of high spray curtain wall 12, second circle of high spray curtain wall the 11, the 3rd circle of first lap, coring
Drilling 14, injection pressure water hole 15, cementing tank 16, cement elephant trunk 17, water tank 18, water pipe 19, level-one agitator 20, mud tube
21st, two level agitator 22, cement mortar pipe 23, operation console 24, control cable 25, high-pressure injection pump 26, high-pressure hydraulic pump 27,
Air compressor machine 28, slip casting high-voltage tube 29, high-pressure water pipe 30, high-pressure air hose 31, drilling machine 32, high spray booth vehicle
Specific embodiment
The shaft wall structure of the high spray curtain pile of a kind of shaft collar section it can be seen from Fig. 1, Fig. 2, Fig. 3, is included in thick aqueous
Backfill the shaft of vertical well 1 that topsoil is set, rock stratum excavated in the pit shaft famine radial line 3, the net radial line 2 of pit shaft and pit shaft famine radial line it
Between pour the borehole wall, be the center of circle with wellbore centre line 1.1, along pit shaft famine radial line periphery at least set three circles head and the tail closing circular ring shape
Height spray curtain wall, 0.6m sets the high spray curtain wall 10 of first lap outside pit shaft famine radial line, the 1.5m outside the high spray curtain wall of first lap
The high spray curtain wall 12 of second circle is set, the outside the high spray curtain walls of two circles 1.5m the high spray curtain wall 11 of the 3rd circle is set, successively
Analogize, escort the borehole wall, enhancing bearing capacity, non-deformability and waterproof ability；The thickness 850mm of the high spray curtain wall is deep
Degree is more than the thickness of thick aqueous backfill topsoil；Injection pressure water hole 14 is set in the pit shaft, carries out injection pressure water test, height spray curtain
Wall area sets coring drilling 13, and coring judges wall quality；The borehole wall is made of inner wall 4 and outer wall 5, and outer wall 350mm is thick
Armored concrete, the armored concrete of inner wall 700mm thickness.
The high spray curtain wall 10 of the first lap, the high spray curtain wall 11 of first lap, the it can be seen from Fig. 1, Fig. 2, Fig. 3
The high spray curtain wall 12 of one circle is connected and composed by the high spray curtain pile on same circle, and the high spray curtain pile is using three pipe high pressures
Rotary spray technique is frozen into cylindric pile body, the pile body and pile body with circle are mutual by cement mortar spray to default high spray drilling
Overlapping connects into the high spray curtain wall of a circular ring shape.
High the 8, second circle of spray drilling of high the 7, the 3rd circle of spray drilling of the first lap is high it can be seen from Fig. 1, Fig. 2, Fig. 3
Spray drilling 9 is vertically drilled to down using drilling machine 31 from ground, and depth is more than thick aqueous backfill thickness of surface soil, bore diameter
150mm；The cement mortar spray enters high spray drilling and expands to periphery, and expanded diameter 850mm has between stake and stake
The overlapping bonding pad of 120mm.
Coring drilling 13 is two it can be seen from Fig. 1, Fig. 2, Fig. 3, is symmetrically set in Gao Pen curtain walls area
It puts, is vertically drilled to down from ground using drilling machine, depth is more than high spray curtain pile depth 5m, bore diameter 91mm, according to taking-up
Core judge high spray quality.
By Fig. 1, Fig. 2, it can be seen from the injection pressure water hole 14, set in the net radial line of pit shaft, using drilling machine from ground
It is vertically drilled to down, depth is more than high spray curtain pile depth 5m, bore diameter 168mm, carries out pressure injection water test to drilling, checks
Height spray curtain wall water plugging effect.
The 4 Concrete Thick 350mm of outer wall it can be seen from Fig. 1, Fig. 2, Fig. 3, label C30, the interior arrangement clad steel of concrete
Muscle (is not marked in figure), principal rod diameter 25mm, is arranged along pit shaft periphery, spacing 300mm；Branch muscle diameter 22mm, along pit shaft
Centerline direction arrangement, spacing 300mm.
The 5 Concrete Thick 700mm of inner wall it can be seen from Fig. 1, Fig. 2, Fig. 3, label C30, the interior arrangement individual layer steel of concrete
Muscle, principal rod diameter 25mm are arranged, spacing 300mm along pit shaft periphery；Branch muscle diameter 22mm, along wellbore centre line direction cloth
It puts, spacing 300mm.
The shaft lining structural construction device of the high spray curtain pile of shaft collar section it can be seen from Fig. 1, Fig. 4, including cementing tank
15th, water tank 17, level-one agitator 19, two level agitator 21, operation console 23, high-pressure injection pump 25, high-pressure hydraulic pump 26, air compressor machine
27th, drilling machine 31 and high spray booth vehicle 32 are formed, and are located at nearby above near wellbore or pit shaft；The cementing tank, water tank respectively by
Cement elephant trunk 16, water pipe 18 are connected with level-one agitator, and level-one agitator is connected with two level agitator by mud tube 20, and two level is stirred
It mixes bucket to be connected by cement mortar pipe 22 with high-pressure injection pump, high-pressure injection pump, high-pressure hydraulic pump, air compressor machine are respectively by slip casting high-voltage tube
28th, high-pressure water pipe 29, high-pressure air hose 30 are connected with high spray booth vehicle；The cementing tank, water tank, level-one agitator, two level stirring
Bucket, high-pressure injection pump, high-pressure hydraulic pump, air compressor machine, drilling machine, high spray booth vehicle are electrically connected by control cable 24 and operation console.
The shaft lining structural construction method of the high spray curtain pile of shaft collar section, carries out as follows：
1st, shaft collar section construction line calibration
(1), wellbore centre point is calibrated in earth's surface according to design coordinate, it is only straight according to the pit shaft of wellbore centre point and design
Footpath and lining thickness calibrate the net radial line of pit shaft and waste radial line line；
(2), 0.6m arranges the high spray curtain pile drilling of first lap arrangement, spacing between two drillings outside pit shaft famine radial line
0.8m；
(3), the high spray curtain pile drilling of the second circle, spacing between two drillings are arranged again outside the high spray curtain pile of first lap
0.8m, the circle remote 1.2m of the second circle and first lap；
(4), the high spray curtain pile drilling of the 3rd circle, spacing between two drillings are arranged again outside the high spray curtain pile of the second circle
0.8m, the circle remote 1.2m of the 3rd circle and the second circle；
The 2nd, constructing device is set by cementing tank, water tank, level-one agitator, two level agitator, high-pressure injection pump, high pressure water
Pump, air compressor machine, slip casting high-voltage tube, high-pressure water pipe, high-pressure air hose, drilling machine, high spray booth vehicle and operation console are located near wellbore nearby
Or above pit shaft, and relevant device is attached successively.
3rd, the high spray curtain pile boring drill interval drilling of first lap of constructing, every one hole of a hole drill, depth is more than thick aqueous
Thickness of surface soil, bore diameter 130mm are backfilled, hole position deviation is not more than 1% no more than 2cm, hole deviation rate；
4th, the high spray curtain wall of high-pressure rotary-spray first lap is every hole spray
(1), design proportion is pressed in slurrying, is released a certain amount of cement from cementing tank 15 is inner by cement elephant trunk 16, is passed through water
Pipe 18 releases a certain amount of water to the level-one agitator 19 with homogenizer in water tank, after mixing time is not less than 30s,
The cement grout prepared is put by mud tube 20 with mixing slowly in the two level agitator 21 of machine, is slowly stirred；
(2), the cement grout in high-pressure delivery two level mixing drum is connected to high-pressure injection pump 25 by cement mortar pipe 22, high
The drilling rod that cement grout in two level mixing drum is transported to high spray booth vehicle 32 by pressure injection stock pump by high-pressure slip-casting pipe (is not marked in figure
Note), water using high-pressure hydraulic pump by high-pressure water pipe is transported to the drilling rod of high spray booth vehicle, air is passed through into high pressure using air compressor machine
Air hose is transported to the drilling rod of high spray booth vehicle；
(3) high pressure jetting sprays drilling hole bottom by supreme under the drilling rod of high spray booth vehicle, and operation console 23 is by controlling cable connection
To high pressure high-pressure injection pump 25, high-pressure hydraulic pump 26 and air compressor machine 27；Start-up operation platform is sent into satisfactory slurry, gas and water, cement
The proportion 1.6 of slurry, pressure 0.6Mpa, flow 60L/min；The pressure of high pressure water is 36Mpa, flow 70L/min；Pressure
The pressure of contracting air is 0.7Mpa, flow 1.0m3/ min, when cement grout emerges aperture, by design hoisting way and
It promotes speed and promotes drilling rod from bottom to top, until promoting the whole spray elevation stop-spraying to design, cement grout is frozen into cylindrical water
Mud stake；Then spray is carried out to the drilling between two again to build, form stake stake and partly overlap the high spray curtain wall being connected；
5th, by the high spray curtain pile drilling of the 3rd circle of step 3 construction；
6th, high spray curtain wall is enclosed by step 4 high-pressure rotary-spray the 3rd；
7th, by the high spray curtain pile drilling of the second circle of step 3 construction；
8th, high spray curtain wall is enclosed by step 4 high-pressure rotary-spray second；
9th, high spray quality inspection
The wellbore centre symmetric position random selection two in the range of high spray curtain reinforcement between first lap and the 3rd circle
A position, construction coring drilling, is drilled to down using drilling machine from ground, and depth is more than high spray curtain pile depth 5m, bore diameter
91mm judges high spray quality according to the core of taking-up；Construction finishes, the boring cement mortar complete opening closure of two corings；
10th, pressure injection water test
A position is randomly choosed in the net radial line of pit shaft as pressure injection water hole, is drilled to down from ground using drilling machine, deeply
Degree is more than high spray curtain pile depth 5m, bore diameter 168mm, and pressure injection water test is carried out to drilling, checks high spray curtain water blockoff effect
Fruit；After pressure injection water test, the pressure injection water hole cement mortar complete opening that construction finishes is blocked；
11st, pit shaft preliminary shaft section outer wall is poured
Pit shaft, casting concrete, each cutting depth are gradually excavated from top to bottom in the range of the waste radial line of pit shaft design
Then 1.8m pours 5 armored concrete of preliminary shaft outer wall, thickness 350 mm, concrete grade C30, until preliminary shaft bottom；Concrete
Interior arrangement double steel bar (being not marked in figure), principal rod diameter are not less than 25mm, are arranged along pit shaft periphery, spacing 300mm；Branch
Muscle diameter is not less than 22mm, is arranged along wellbore centre line direction spacing 300mm；
12nd, pit shaft preliminary shaft section outer wall is poured
From preliminary shaft bottom 4 armored concrete of continuous placing preliminary shaft inner wall from bottom to top, until well head earth's surface, thickness 700mm,
Concrete grade C30, concrete is interior to arrange double steel bar (being not marked in figure), and principal rod diameter 25mm is arranged along pit shaft periphery,
Spacing 300mm；Branch's muscle diameter is not less than 22mm, is arranged along wellbore centre line direction spacing 300mm；
13rd, Demolition Construction device, construction terminate.
Claims (8)
1. the shaft wall structure of the high spray curtain pile of shaft collar section is included in the shaft of vertical well (1) that thick aqueous backfill topsoil is set,
Pit shaft is excavated in the net radial line of pit shaft (2), the borehole wall is poured between the net radial line of pit shaft and pit shaft famine radial line (3), which is characterized in that
With wellbore centre line (1.1) for the center of circle, the high spray curtain of circular ring shape of three circles head and the tail closing is at least set along pit shaft famine radial line periphery
Wall, 0.6m sets the high spray curtain wall (10) of first lap outside pit shaft famine radial line, and 1.2~2m is set outside the high spray curtain wall of first lap
The high spray curtain wall (12) of second circle, the outside the high spray curtain walls of two circles 1.2~2m the high spray curtain wall (11) of the 3rd circle is set；Institute
800~the 1000mm of thickness for the high spray curtain wall stated, depth are more than the thickness of thick aqueous backfill topsoil；It is set in the pit shaft
Injection pressure water hole (14) carries out injection pressure water test, and Gao Pen curtain walls area sets coring drilling (13), and coring judges wall quality；Institute
The borehole wall stated is made of inner wall (5) and outer wall (4), outer wall be not less than 300mm thickness armored concrete, inner wall for not less than
The armored concrete of 600mm thickness.
2. the shaft wall structure of the high spray curtain pile of shaft collar section according to claim 1, which is characterized in that described first
The high spray curtain wall (10) of circle, the high spray curtain wall (11) of the 3rd circle, the high spray curtain wall (12) of the second circle are by the high spray curtain on same circle
Curtain stake connects and composes, and the high spray curtain pile is to be bored cement mortar spray to default high spray using three pipe High-pressure Spiral Spray Technologies
In hole, cylindric pile body is frozen into, pile body and the pile body with circle overlapped connect into the high spray curtain wall of an annular.
3. the shaft wall structure of the high spray curtain pile of shaft collar section according to claim 1, which is characterized in that described first
The high spray drilling (7) of circle, the high spray drilling (8) of the 3rd circle, the high spray drilling (9) of the second circle are using drilling machine (31) from the vertical drill down in ground
Into depth is more than thick aqueous backfill thickness of surface soil, and bore diameter is not less than 130mm；Cement mortar spray enter high spray drilling and to
Periphery is expanded, and expanded diameter is 800mm~1000mm, there is the overlapping bonding pad not less than 100mm between stake and stake.
4. the shaft wall structure of the high spray curtain pile of shaft collar section according to claim 1, which is characterized in that the coring
(13) are drilled as two, is symmetrical arranged in Gao Pen curtain walls area, is vertically drilled to down from ground using drilling machine, depth is more than height
Curtain pile depth 5m, bore diameter 91mm are sprayed, high spray quality is judged according to the core of taking-up.
5. the shaft wall structure of the high spray curtain pile of shaft collar section according to claim 1, which is characterized in that the injection pressure
Water hole (14) is at least one, is set in the net radial line of pit shaft, is vertically drilled to down from ground using drilling machine, and depth is more than high spray curtain
Curtain stake depth 5m, bore diameter 168mm carry out pressure injection water test to drilling, check high spray curtain wall water plugging effect.
6. the shaft wall structure of the high spray curtain pile of shaft collar section according to claim 1, which is characterized in that the outer wall
(4) concrete is not less than C30 for label, double steel bar is arranged in concrete, principal rod diameter is not less than 20mm, along pit shaft periphery
Arrangement, spacing 300mm；Branch's muscle diameter is not less than 20mm, is arranged along wellbore centre line direction, spacing 300mm.
7. the shaft wall structure of the high spray curtain pile of shaft collar section according to claim 1, which is characterized in that the inner wall
(5) concrete is not less than C30 for label, individual layer reinforcing bar is arranged in concrete, principal rod diameter is not less than 20mm, along pit shaft periphery
Arrangement, spacing 300mm；Branch's muscle diameter is not less than 20mm, is arranged along wellbore centre line direction, spacing 300mm.
8. the constructing device of the shaft wall structure of the high spray curtain pile of shaft collar section according to claim 1, which is characterized in that
The device includes cementing tank (15), water tank (17), level-one agitator (19), two level agitator (21), operation console (23), high pressure injection
Stock pump (25), high-pressure hydraulic pump (26), air compressor machine (27), drilling machine (31) and high spray booth vehicle (32) are formed, and are located near wellbore nearby
Or above pit shaft；The cementing tank, water tank are connected respectively by cement elephant trunk (16), water pipe (18) with level-one agitator, level-one
Agitator is connected with two level agitator by mud tube (20), and two level agitator is connected with high-pressure grouting pump by cement mortar pipe (22)
It connects, high-pressure grouting pump, high-pressure hydraulic pump, air compressor machine are respectively by slip casting high-voltage tube, high-pressure water pipe, high-pressure air hose and high spray booth vehicle
Connection；The cementing tank, water tank, level-one agitator, two level agitator, high-pressure injection pump, high-pressure hydraulic pump, air compressor machine, drilling machine,
High spray booth vehicle is electrically connected by control cable by control cable (24) and operation console.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227958A (en) * | 2017-07-25 | 2017-10-03 | 马钢(集团)控股有限公司 | Shaft wall structure, constructing device and the method for the high spray curtain pile of shaft collar section |
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2017
- 2017-07-25 CN CN201720905872.1U patent/CN207377563U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227958A (en) * | 2017-07-25 | 2017-10-03 | 马钢(集团)控股有限公司 | Shaft wall structure, constructing device and the method for the high spray curtain pile of shaft collar section |
| CN107227958B (en) * | 2017-07-25 | 2023-07-04 | 马钢(集团)控股有限公司 | Well wall structure of vertical well neck section high-spraying curtain pile, construction device and construction method |
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Address after: 243071 No. 1899 Taibai Road, Ma'anshan economic and Technological Development Zone, Anhui Patentee after: Anhui Maanshan Iron and Steel Mining Resources Group Co., Ltd. Address before: 243071 No. 1899 Taibai Road, Ma'anshan economic and Technological Development Zone, Anhui Patentee before: Magang Group mining industry Co., Ltd |