CN113847036B - Double-wall seat structure for deep drilling shaft after breaking bottom of well wall and construction method - Google Patents
Double-wall seat structure for deep drilling shaft after breaking bottom of well wall and construction method Download PDFInfo
- Publication number
- CN113847036B CN113847036B CN202111243138.0A CN202111243138A CN113847036B CN 113847036 B CN113847036 B CN 113847036B CN 202111243138 A CN202111243138 A CN 202111243138A CN 113847036 B CN113847036 B CN 113847036B
- Authority
- CN
- China
- Prior art keywords
- wall
- well
- well wall
- seat
- drilling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 92
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 230000007704 transition Effects 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000007689 inspection Methods 0.000 claims description 48
- 229910000831 Steel Inorganic materials 0.000 claims description 41
- 239000010959 steel Substances 0.000 claims description 41
- 239000004567 concrete Substances 0.000 claims description 29
- 238000005422 blasting Methods 0.000 claims description 17
- 239000011435 rock Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 230000005641 tunneling Effects 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 5
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 abstract description 6
- 241001023788 Cyttus traversi Species 0.000 abstract description 4
- 238000005192 partition Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 241000264877 Hippospongia communis Species 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 101100366060 Caenorhabditis elegans snap-29 gene Proteins 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention provides a double-wall seat structure after a deep drilling shaft breaks the bottom of the well wall, which relates to the technical field of drilling construction, and the double-wall seat structure is arranged below the well wall of a drilling section and comprises: the auxiliary wall seat is connected with the lower end of the well wall of the drilling section; the upper end of the transition section well wall is connected with the lower end of the auxiliary wall seat; the main wall seat is connected with the lower end of the transition section well wall, and is positioned below the auxiliary wall seat; the thickness of the auxiliary wall seat is smaller than that of the main wall seat, and the invention effectively avoids the phenomenon that the upper well wall is pulled apart among a plurality of joints due to repeated damage and repair of the lower horse head door of the well bore under the condition of thick loose layer and thin bedrock, prevents water burst and sand burst from flooding the well, and reduces the possibility of accidents.
Description
Technical Field
The invention relates to the technical field of drilling construction, in particular to a double-wall seat structure for a deep drilling shaft after a well wall bottom is broken.
Background
After the well drilling well wall cylinder is sunk to the bottom and filled and well cemented, the well wall structure is in a stable stress state. When the bottom of the well wall is cut by adopting a blasting method, if the bottom of the well wall is removed once, the lower supporting constraint is released, the lower end face of the well wall cylinder is in a suspended state, and the well wall cylinder is extremely easy to crack or damage at the weak position of the vertical bearing capacity among the well wall joints of the well drilling, so that the stress and the water resistance of the well wall are adverse, and the safe use of the well shaft is influenced.
If the well bore is in a condition of thick loose layer and thin bedrock, the upper well bore wall is pulled apart among a plurality of joints due to the repeated damage of the lower horse head door, so that water burst and sand burst are caused to submerge the well bore, and serious economic loss is caused.
Disclosure of Invention
The invention aims to provide a double-wall seat structure for a deep drilling shaft after a well wall bottom is broken and a construction method, which avoid the disturbance influence and damage to the well wall of a drilling section caused by blasting vibration, deformation of the well wall of a bedrock section or construction of a horsedoor chamber and the like when the well wall of the lower bedrock section is constructed.
In order to achieve the above object, the present invention provides the following technical solutions: a double-wall seat structure behind a deep-well drilling shaft breaking a well wall bottom, the double-wall seat structure being arranged below a well wall of a drilling section, comprising: the auxiliary wall seat is connected with the lower end of the well wall of the drilling section; the upper end of the transition section well wall is connected with the lower end of the auxiliary wall seat; the main wall seat is connected with the lower end of the transition section well wall, and is positioned below the auxiliary wall seat; the thickness of the auxiliary wall seat is smaller than that of the main wall seat.
Further, in the double-wall seat structure after the bottom of the well wall is broken by the deep well drilling shaft, the outer diameter of the wall of the transition section is the same as the outer diameter of the wall of the well drilling section, and the inner diameter of the wall of the transition section is smaller than the inner diameter of the wall of the well drilling section; the inner diameter of the transition section well wall is 2400-2600 mm; the outer diameter of the well wall of the drilling section is 2500mm-2700mm; the wall thickness of the transition section well wall is 800-900 mm; the wall thickness of the well wall of the drilling section is 700mm-800mm.
Further, in the above-mentioned double-wall seat structure after the deep-well wellbore breaks the bottom of the well wall, the auxiliary wall seat includes a first outer protruding portion and a first annular portion; the first outer protruding part is arranged on the outer surface of the first annular part, the outer diameter of the first annular part is the same as the outer diameter of the well wall of the drilling section, the upper end of the first annular part is connected with the well wall of the drilling section, and the lower end of the first annular part is connected with the well wall of the transition section; the longitudinal section of the first outer convex part is a first trapezoid, and the angles of the lower base angles of the first trapezoid are 45 degrees and 70 degrees respectively; the length of the upper bottom of the first trapezoid is 1700-1900 mm, and the length of the lower bottom of the first trapezoid is 2400-2600 mm; the main wall seat comprises a second outer convex part and a second annular part, the second outer convex part is arranged on the outer surface of the second annular part, the outer diameter of the second annular part is the same as the outer diameter of the transition section well wall, and the upper end of the second annular part is connected with the transition section well wall; the longitudinal section of the second outer convex part is a second trapezoid, the length of the upper bottom of the second trapezoid is 550-650 mm, and the length of the lower bottom of the second trapezoid is 3200-3400 mm.
Further, in the double-wall seat structure after the bottom of the well wall is broken by the deep drilling well shaft, the thickness of the first outer protruding portion is 400mm-600mm, and the thickness of the second outer protruding portion is 1000mm-1400mm.
Further, in the double-wall seat structure of the deep drilling shaft after the bottom of the well wall is broken, the transition section well wall, the auxiliary wall seat and the main wall seat are all of reinforced concrete structures; the distance between the steel bars in the wall of the transition section is 275mm-325mm; the distance between the reinforcing steel bars in the auxiliary wall seat is 275mm-325mm.
On the other hand, a construction method of a double-wall seat structure is provided, which is used for constructing the auxiliary wall seat in the double-wall seat structure, and comprises the following steps: s1: confirming the state of the well wall of the drilling section; s2: dividing and breaking the bottom of the well wall of the well; s3: in each subarea, continuing downwards tunneling from the broken well wall bottom of the well drilling until tunneling out of a space required by installing the auxiliary wall seat, temporarily supporting surrounding rock, and erecting I-steel piles in the space; s4: binding reinforcing steel bars on the auxiliary wall seat, and setting an auxiliary wall seat template; s5: and carrying out concrete pouring on the auxiliary wall seat.
Further, in the above construction method of a double-wall base structure, the confirming the state of the wall of the well section includes: s11: arranging a plurality of groups of inspection holes on the well wall of the drilling section, wherein the central line of each inspection hole is perpendicular to the well wall of the drilling section; s12: confirming whether the inspection hole has a guniting or water spraying phenomenon; s13: when the inspection hole has the phenomenon of spraying slurry or water, grouting and reinforcing the wall of the well drilling section; s14: plugging the inspection hole; wherein the inspection hole is arranged in a range of 30m above the bottom of the well wall of the well; the number of each group of the inspection holes is 6, the heights of the 6 inspection holes are the same, and the 6 inspection holes are arranged along the circumferential direction of the well wall of the drilling section; the height difference of the two adjacent groups of inspection holes on the well wall of the drilling section is 3m-5m, and the projections of the two adjacent groups of inspection holes on the vertical direction are not overlapped; and the inspection hole passes through the well wall of the drilling section and the filling layer of the well wall of the drilling section at the same time.
Further, in the construction method of a double-wall base structure, the partition breaking the well wall bottom of the well includes: s21: establishing a rectangular coordinate system on the upper surface of the well wall bottom of the well, taking the circle center of the upper surface of the well wall bottom of the well as the origin of the rectangular coordinate system, and establishing an x axis and a y axis on the basis of the origin; s22: dividing the upper surface of the well wall bottom of the well into a first area, a second area, a third area and a fourth area with the same area according to the rectangular coordinate system, wherein the first area is an area between a function y=0 and a function y= -x in the rectangular coordinate system, the second area is an area between the function y=0 and the function y=x in the rectangular coordinate system, the third area is an area between the function x=0 and the function y=x in the rectangular coordinate system, and the fourth area is an area between the function x=0 and the function y= -x in the rectangular coordinate system; s23: and blasting the first area, the third area, the fourth area and the second area in sequence.
Further, in the construction method of the double-wall seat structure, the thickness of each concrete pouring is not more than 300mm, the vibration distribution interval of the concrete is 300-400 mm, and the temperature range of the concrete entering the auxiliary wall seat template is 15-20 ℃.
Further, in the construction method of a double-wall base structure, the i-steel pile comprises a plurality of steel beams, and the upper ends of the steel beams are supported on the lower end face of the well wall of the drilling section; and the connection mode among the plurality of steel beams is welding.
Analysis shows that the invention discloses a double-wall seat structure for a deep well drilling shaft after a well wall bottom is broken and a construction method, which effectively avoid the phenomenon that the well drilling shaft positioned under the condition of thick loose layer thin bedrock is broken and repaired for a plurality of times by a lower horse head door, so that the upper well drilling shaft wall is pulled apart among a plurality of joints, water burst and sand burst are prevented from submerging the well, and the possibility of accident occurrence is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. Wherein:
FIG. 1 is a schematic view of an auxiliary wall seat according to an embodiment of the present invention.
FIG. 2 is a schematic view of a main wall base according to an embodiment of the present invention.
FIG. 3 is a schematic view of the borehole wall bottom of an embodiment of the present invention.
FIG. 4 is a schematic top view of the structure of a steel stack tray according to an embodiment of the invention.
FIG. 5 is a schematic cross-sectional view of a steel stack tray according to an embodiment of the invention.
Reference numerals illustrate: 1. a main wall base; 2. an auxiliary wall seat; 3. a transition section well wall; 4. a wall of the well drilling section; 5. a well wall bottom; 6. and (5) steel stack trays.
Detailed Description
The invention will be described in detail below with reference to the drawings in connection with embodiments. The examples are provided by way of explanation of the invention and not limitation of the invention. Indeed, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. Accordingly, it is intended that the present invention encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.
In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. The terms "coupled," "connected," and "configured" as used herein are to be construed broadly and may be, for example, fixedly connected or detachably connected; can be directly connected or indirectly connected through an intermediate component; either a wired electrical connection, a radio connection or a wireless communication signal connection, the specific meaning of which terms will be understood by those of ordinary skill in the art as the case may be.
One or more examples of the invention are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the invention. As used herein, the terms "first," "second," "third," and "fourth," etc. are used interchangeably to distinguish one component from another and are not intended to represent the location or importance of the individual components.
As shown in fig. 1 to 5, according to an embodiment of the present invention, there is provided a double-wall seat structure after a deep-well wellbore breaks a bottom 5 of the wellbore, the double-wall seat structure being disposed below a wall 4 of a drilling section, including: the auxiliary wall seat 2 is connected with the lower end of the well wall 4 of the drilling section; the upper end of the transition section well wall 3 is connected with the lower end of the auxiliary wall seat 2; the main wall seat 1 is connected with the lower end of the transition section well wall 3, and the main wall seat 1 is positioned below the auxiliary wall seat 2; wherein the thickness of the auxiliary wall seat 2 is smaller than that of the main wall seat 1. The auxiliary wall seat 2 is arranged above the main wall seat 1, so that the construction can be performed immediately after the well wall bottom 5 is broken, the construction is convenient, the surrounding rock lithology restriction is avoided, the auxiliary wall seat 2 can immediately support the well wall bottom 5 of the well, and disturbance damage to the well wall of the well due to lower construction is reduced. The main wall seat 1 is required to be arranged in an intact bedrock, has large structural size and long construction time, and is usually disadvantageous to the stress of the drilling well wall when the main wall seat 1 is directly constructed when the well wall bottom 5 is broken.
Preferably, the outer diameter of the transition section well wall 3 is the same as the outer diameter of the well drilling section well wall 4, and the inner diameter of the transition section well wall 3 is larger than the inner diameter of the well drilling section well wall 4; preferably, the inner diameter of the transition section well wall 3 is 2400mm-2600mm, and can be 2400mm, 2450mm, 2500mm, 2550mm, 2600mm, preferably 2500mm; preferably, the outer diameter of the well wall 4 of the drilling section is 2500mm-2700mm, which can be 2500mm, 2550mm, 2600mm, 2650mm and 2750mm, preferably 2600mm; preferably, the wall thickness of the transition section well wall 3 is 800mm-900mm, and is selected from 800mm, 825mm, 850mm, 875mm and 900mm, and preferably 850mm; preferably, the wall thickness of the well wall 4 of the drilling section is 700mm-800mm, and can be 725mm, 750mm, 775mm and 800mm, and preferably 750mm.
The auxiliary wall seat 2 comprises a first outer convex part and a first annular part; the first outer protruding part is arranged on the outer surface of the first annular part, the outer diameter of the first annular part is the same as the outer diameter of the well wall 4 of the drilling section, the upper end of the first annular part is connected with the well wall 4 of the drilling section, and the lower end of the first annular part is connected with the well wall 3 of the transition section; preferably, the longitudinal section of the first outer convex part is trapezoid, and the angles of the lower base angles of the first trapezoid are 45 degrees and 70 degrees respectively; preferably, the length of the upper bottom of the first trapezoid is 1700mm-1900mm, preferably 1838mm, and the length of the lower bottom of the first trapezoid is 2400mm-2600mm, preferably 2520mm; preferably, the main wall seat 1 includes a second outer protruding portion and a second annular portion, the second outer protruding portion is disposed on an outer surface of the second annular portion, an outer diameter of the second annular portion is the same as an outer diameter of the transition section well wall 3, an upper end of the second annular portion is connected with the transition section well wall 3, preferably, a longitudinal section of the second outer protruding portion is a second trapezoid, a length of an upper bottom of the second trapezoid is 550mm-650mm, optionally 550mm, 575mm, 600mm, 625mm, 650mm, preferably 600mm, and a length of a lower bottom of the second trapezoid is 3200mm-3400mm, optionally 3200mm, 3250mm, 3300mm, 3350mm, 3400mm, preferably 3300mm. Preferably, the thickness of the first outer protruding portion is 400mm-600mm, optionally 400mm, 450mm, 500mm, 550mm, 600mm, preferably 500mm, i.e. the height of the longitudinal section of the first outer protruding portion, which is represented by a straight line AB in fig. 1, and the thickness of the second outer protruding portion is 1000mm-1400mm, optionally 1000mm, 1100mm, 1200mm, 1300mm, 1400mm, preferably 1200mm.
Preferably, the transition section well wall 3, the auxiliary wall seat 2 and the main wall seat 1 are all reinforced concrete structures; the distance between the steel bars in the transition section well wall 3 is 275mm-325mm; the distance between the reinforcing steel bars in the auxiliary wall seat 2 is 275mm-325mm.
The invention also discloses a construction method of the double-wall seat structure, which is used for constructing the auxiliary wall seat 2 in the double-wall seat structure and comprises the following steps: s1: confirming the state of the well wall 4 of the drilling section; s2: dividing and breaking the well wall bottom 5 of the well; s3: in each partition, tunneling downwards from the broken drilling well wall bottom 5 until the designed size of the auxiliary wall seat 2 is dug in and out to temporarily support surrounding rock, erecting I-steel piles in the space, and constructing 4 partitions according to the same method; s4: binding reinforcing steel bars on the auxiliary wall seat 2, and setting up a template of the auxiliary wall seat 2; s5: and (5) pouring concrete into the auxiliary wall seat 2.
Preferably, the confirming of the state of the wellbore wall 4 of the drilling section (post-wall filling state) comprises: s11: a plurality of groups of inspection holes are formed in the well wall 4 of the drilling section, and the center line of each inspection hole is perpendicular to the well wall 4 of the drilling section; s12: confirming whether the inspection hole has a guniting or water spraying phenomenon; s13: when the inspection hole has the phenomenon of spraying slurry or water, grouting and reinforcing the wall 4 of the well wall of the drilling section; s14: plugging the inspection hole; wherein the inspection hole is arranged in a range of 30m above the well wall bottom 5 of the well; the number of each group of the inspection holes is 6, the heights of the 6 inspection holes are the same, and the 6 inspection holes are arranged along the circumferential direction of the well wall 4 of the drilling section; the height difference of two adjacent groups of inspection holes on the well wall 4 of the drilling section is 3m-5m, and the projections of the two adjacent groups of inspection holes on the vertical direction are not overlapped; the inspection holes penetrate through the well wall 4 of the drilling section and the filling layer of the well wall 4 of the drilling section at the same time, construction safety can be ensured through pre-inspection of the well wall 4 of the drilling section, and the occurrence possibility of accidents is reduced.
Preferably, the partition breaking the borehole wall bottom 5 comprises: s21: establishing a rectangular coordinate system on the upper surface of the well drilling well wall bottom 5, taking the circle center of the upper surface of the well drilling well wall bottom 5 as the origin of the rectangular coordinate system, and establishing an x axis and a y axis on the basis of the origin; s22: dividing the upper surface of the well wall bottom 5 into a first area, a second area, a third area and a fourth area with the same area according to the rectangular coordinate system, wherein the first area is an area between a function y=0 and a function y= -x in the rectangular coordinate system, the second area is an area between the function y=0 and the function y=x in the rectangular coordinate system, the third area is an area between the function x=0 and the function y=x in the rectangular coordinate system, and the fourth area is an area between the function x=0 and the function y= -x in the rectangular coordinate system; s23: the first area, the third area, the fourth area and the second area are blasted in sequence, and uneven stress on the well wall of the well can be effectively reduced through construction according to the sequence.
Preferably, the thickness of each concrete pouring is not more than 300mm, the vibration distribution interval of the concrete is 300-400 mm, the temperature range of the concrete entering the auxiliary wall seat 2 template is 15-20 ℃, and the concrete pouring can be better completed by constructing according to the vibration distribution interval and the temperature of the concrete.
Preferably, the steel pile disc 6 comprises a plurality of steel beams, and the lower ends of the steel beams are positioned on the surface of the tunneled rock; the upper ends of the plurality of steel beams are supported on the lower end face of the well wall 4 of the drilling section; the connection mode among the plurality of steel beams is welding; the steel stack disc 6 can prevent the well drilling wall cylinder from being pulled and damaged due to suspension of the lower part.
The concrete construction steps of the invention are as follows:
preparation of construction before breaking the well wall bottom 5 of the well: six inspection holes are drilled at intervals of 4m along the circumference of a shaft (the well wall 4 of a drilling section) within the range of 30m upwards from the well wall bottom 5, the holes on the upper layer and the lower layer are staggered, and the hole depth is required to pass through a filling layer; the inspection hole has no spraying and water spraying phenomenon, and if slurry and water flow out of the inspection hole, the grouting is re-supplemented. All inspection holes should be sealed. After joint inspection, the wall is confirmed, and the work of breaking the well wall bottom 5 can be performed without high-pressure slurry and water or re-filling grouting meeting the requirements.
In order to ensure construction safety, a method of suspicious detection and simultaneous detection and excavation should be adopted for construction. The inspection Kong Toukong in the well wall bottom 5 is required to be inspected before the well wall bottom 5 is broken, a high-pressure ball valve is arranged in an inspection hole during the through hole, the hole depth is 2m, and the filling effect after the well wall bottom 5 is filled is inspected after no slurry and water exist, and the concrete method is as follows: 4 holes are arranged on a circle with a net diameter of 1.6m and a shaft bottom 5 is centered in the shaft, the depth of each hole is 2m, 4 inspection holes are detected, when the inspection holes are drilled, a drilling depth of 400mm (diameter phi 42) is achieved, an orifice pipe and a 10MPa high-pressure ball valve are installed, then a small drill bit (diameter phi 28) is used for drilling to a design depth of 2m through the orifice pipe and the high-pressure ball valve, if water or slurry is discharged, a grouting pump is used for pre-grouting on a working face after the slurry is discharged, and the water-cement ratio in the earlier stage of slurry proportioning is 1: 1. post water to ash ratio 0.75:1, the grouting pressure is 8MPa, and after grouting of 4 inspection holes is finished, the central hole of the well wall bottom 5 is put again, so that the work of breaking the well wall bottom 5 can be performed. When the inspection hole is punched and the high-pressure ball valve at the bottom 5 of the well wall is opened, protective measures must be taken to prevent high-pressure slurry or water from hurting people.
The design position of the auxiliary wall seat 2 is vertical height-542.990 to-545.510 m and thickness is 1400mm, wherein the bottom of the auxiliary wall seat 2 is-545.510 m. The height of the metal template for casting the concrete is 1.26m, the auxiliary wall seat 2 is used for constructing two moulds, and the height of the two moulds is 2.52m. Because surrounding mudstones are soaked in water for a long time, the strength and the overall stability of the surrounding mudstones are obviously reduced, after the bottom 5 of the well wall is broken, the surrounding rocks are immediately sealed and the permanent well wall is poured, so that adverse effects on the well wall caused by the weathering and expansion of the mudstones are avoided.
When the well bottom 5 is broken, the central welding plate of the well bottom 5 is firstly broken, and the space is used as a free surface for subsequent blasting, which is equivalent to a groove cavity, so that the water is conveniently drained and blasted. Then, the well wall bottom 5 is drilled, and the whole section is drilled once by adopting the split blasting.
Dividing the whole well wall bottom 5 into 8 equal parts, symmetrically blasting four times, sealing the hole by using a conical wood wedge in time after all holes are drilled, preventing gangue from entering the hole after blasting for multiple times, timely cleaning the gangue after blasting each time, and cutting steel plates, steel bars and the like. When the drilling is performed, dense drilling holes (blank holes) are arranged along the contour line at the joint of the well wall bottom 5 and the straight line well wall, the depth is the depth of the drilling holes penetrating the well wall, the blank hole distance is 200 mm, the effect is that a damping belt is artificially manufactured in the well wall, and the transmission of explosion shock waves in the well wall is reduced, so that the aims of reducing the shock and protecting the upper straight line well wall are fulfilled. And simultaneously, the lower part of the well wall bottom 5 and surrounding filling layers are excavated, and a reinforced concrete structure is adopted to form the structure form of the auxiliary wall seat 2.
The concrete construction sequence is as follows: breaking the central welding plate of the well wall bottom 5, drilling holes once, sequentially breaking the well wall bottom 5 according to four partitions, carrying out temporary support in each partition, erecting I-steel piles, binding steel bars, vertical templates and pouring concrete integrally after the construction of the four partitions is completed.
During tunneling, a 7566 pneumatic rock drill is used for drilling holes, a hollow hexagonal steel drill with the length of 1.0m is matched with a phi 42mm straight drill bit, high-power T220 emulsion explosive for coal mine allowable is used for blasting, a phi 35 multiplied by 400mm explosive roll is used for blasting, and a millisecond electromagnetic detonator is used for blasting. The depth of the blast holes is 600mm, and marks are made on the drill rod by using red paint. The well wall is divided into 8 parts by equally dividing the well wall into four blasting symmetrically. Specifically, blasting is firstly performed in a first area, a pneumatic pick is used for brushing the size after each blasting, a solid bottom is cleared, a 11# mining I-steel lapping type steel pile disc 6 is used on a rock surface, and the I-steel lapping type steel pile disc is supported to the lower end face of the upper well wall of a well and is in close contact. The length of the steel stack disc 6 is multiplied by the width of the steel stack disc and the height of the steel stack disc is multiplied by 1200 multiplied by 600 multiplied by 2500mm, and each mining I-steel is firmly welded so as to prevent other parts from falling down and losing function when blasting; simultaneously, the surrounding rock is temporarily supported, the anchor rods are seam type anchor rods, the rule of the seam type anchor rods is phi 45 multiplied by 1600mm, the interval row distance is 800 multiplied by 800mm, and each anchor rod is anchored by two resin anchoring agents. The net sheet is 1000mm multiplied by 1000mm and is formed by spot welding phi 6mm disc circles, the net sheet is 100mm multiplied by 100mm, and the lap joint length of the net sheet is 150mm. And constructing the third area, the fourth area and the second area according to the same method until the well wall bottom 5 is completely broken. Binding steel bars, standing templates, pouring concrete, and pouring the built steel chopping board into the concrete as a part of the supporting structure. In order to ensure the compactness of the concrete joint, a 200X 200mm inclined plane is chiseled at the joint of the well wall 4 of the drilling section before the mould is erected, and the well is cleaned; when concrete is poured, the part needs to be reinforced for vibration, so that honeycomb and pitted surfaces are prevented from being produced to influence the engineering quality.
In order to reduce blasting vibration as much as possible, the part with the insufficient section height is constructed by adopting a pneumatic pick for tunneling.
In the rock loading work, a HZ-6 type center rotary grab is adopted for rock loading, the capacity of the rock loading machine is more than 50m < 3 >/h, a lifting container is a 4m < 3 > seat hook type gangue bucket, after the rock loading machine is lifted to a gangue pouring table, gangue falls to the ground directly through a chute, and then the gangue is loaded into a dump truck in a concentrated mode by a loader at fixed time and is transported to a designated place for discharging. The vertical bars and the annular bars used for the auxiliary wall seat 2 are II-level threaded bars, the ground is processed according to the drawn size, then the overlapping positions are drawn by red paint, and the classification and numbering are carried out. When the binding connection is carried out underground according to the design drawing, the joints are required to be staggered, and the circumferential reinforcing steel bar joints with the same longitudinal section are not more than 25% of the total area of the reinforcing steel bars. The thickness of the reinforcement protection layer is 80mm for the inner edge and 100mm for the outer edge, and the thickness is based on the center of the circumferential reinforcement. The lap joint size of the ring rib is 36d, when the steel bar is cut off after the well wall bottom 5 is blasted, a vertical rib with the length of 900mm is reserved downwards at the well depth of-542.990 m and cannot be cut off, the steel bar of the small wall seat is pricked at one time, the upper ends of the vertical ribs are welded and connected by double-sided welding seams, the lap joint length of the upper part is 36d, a straight thread connecting sleeve is arranged on the vertical rib at the lower end, and the vertical rib is buried in yellow sand to prepare for the connection of the steel bar for the next construction.
The auxiliary wall seat 2 sections of the wall are built by adopting metal assembly templates, the height of the wall building sections is 2.52m, after the section height of the first section is excavated, a technician marks the building circle diameter by lime according to the designed net diameter (5.0 m) of the central line of a shaft, a 200mm concrete cushion layer is paved on the bottom 5 of the well wall, a layer of yellow sand is paved, and the cutting edge angle with the depth of 300mm is formed.
The 3m3 bottom unloading type material for the concrete well stirred on the ground is then put into an ash receiving disc of a lower hanging scaffold, the concrete is symmetrically put into a mould through a conveying pipe, the concrete is rammed by an inserted high-frequency vibrator, the thickness of the concrete is preferably not more than 300mm each time, the vibration distribution interval is generally 300-400 mm, the phenomena of vibration leakage and vibration lack are avoided, and the occurrence of honeycombs and pitting surfaces is prevented. The temperature of the concrete in the mould is controlled within 15-20 ℃. The subsequent main wall seat 1 is constructed according to the existing construction mode.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the phenomenon that the upper well wall of the well is pulled out among a plurality of joints due to the fact that the well drilling shaft under the condition of thick loose layer thin bedrock is damaged by the lower horse head gate for many times is effectively avoided, water burst and sand burst are prevented from submerging the well, and the possibility of accidents is reduced. The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A double-wall seat structure behind deep-well drilling pit shaft broken wall bottom of the well wall, double-wall seat structure locates the below of drilling section wall of the well, its characterized in that includes:
the auxiliary wall seat is connected with the lower end of the well wall of the drilling section;
the upper end of the transition section well wall is connected with the lower end of the auxiliary wall seat;
The main wall seat is connected with the lower end of the transition section well wall, and is positioned below the auxiliary wall seat;
Wherein the thickness of the auxiliary wall seat is smaller than that of the main wall seat;
The auxiliary wall seat comprises a first outer convex part and a first annular part; the first outer protruding part is arranged on the outer surface of the first annular part, the outer diameter of the first annular part is the same as the outer diameter of the well wall of the drilling section, the upper end of the first annular part is connected with the well wall of the drilling section, and the lower end of the first annular part is connected with the well wall of the transition section;
The main wall seat comprises a second outer convex part and a second annular part, the second outer convex part is arranged on the outer surface of the second annular part, the outer diameter of the second annular part is the same as the outer diameter of the transition section well wall, and the upper end of the second annular part is connected with the transition section well wall;
the outer diameter of the transition section well wall is the same as the outer diameter of the drilling section well wall, and the inner diameter of the transition section well wall is smaller than the inner diameter of the drilling section well wall.
2. The deep-well wellbore bottom-breaking double-wall seat structure according to claim 1, wherein,
The inner diameter of the transition section well wall is 2400-2600 mm;
the outer diameter of the well wall of the drilling section is 2500mm-2700mm;
The wall thickness of the transition section well wall is 800-900 mm;
the wall thickness of the well wall of the drilling section is 700mm-800mm.
3. The double-wall seat structure after breaking the bottom of a well wall of a deep-well wellbore according to claim 1, wherein the longitudinal section of the first outer flange part is a first trapezoid, and the angles of the lower bottom angles of the first trapezoid are 45 degrees and 70 degrees respectively;
The length of the upper bottom of the first trapezoid is 1700-1900 mm, and the length of the lower bottom of the first trapezoid is 2400-2600 mm;
The longitudinal section of the second outer convex part is a second trapezoid, the length of the upper bottom of the second trapezoid is 550-650 mm, and the length of the lower bottom of the second trapezoid is 3200-3400 mm.
4. A double-wall seat structure after breaking the bottom of a well wall in a deep-well wellbore according to claim 3, wherein the thickness of the first outer protruding part is 400mm-600mm, and the thickness of the second outer protruding part is 1000mm-1400mm.
5. The double-wall seat structure after breaking the bottom of the well wall of the deep-well drilling well shaft according to claim 1, wherein the transition section well wall, the auxiliary wall seat and the main wall seat are all reinforced concrete structures;
the distance between the steel bars in the wall of the transition section is 275mm-325mm;
the distance between the reinforcing steel bars in the auxiliary wall seat is 275mm-325mm.
6. A method of constructing a double-walled seat structure for use in constructing the auxiliary wall seat in the double-walled seat structure of any of claims 1-5, characterized by: the method comprises the following steps:
S1: confirming the state of the well wall of the drilling section;
s2: dividing and breaking the bottom of the well wall of the well;
S3: in each subarea, continuing downwards tunneling from the broken well wall bottom of the well drilling until tunneling out of a space required by installing the auxiliary wall seat, temporarily supporting surrounding rock, and erecting I-steel piles in the space;
s4: binding reinforcing steel bars on the auxiliary wall seat, and setting an auxiliary wall seat template;
s5: and carrying out concrete pouring on the auxiliary wall seat.
7. The method of claim 6, wherein the determining the status of the wall of the wellbore section comprises:
S11: arranging a plurality of groups of inspection holes on the well wall of the drilling section, wherein the central line of each inspection hole is perpendicular to the well wall of the drilling section;
S12: confirming whether the inspection hole has a guniting or water spraying phenomenon;
S13: when the inspection hole has the phenomenon of spraying slurry or water, grouting and reinforcing the wall of the well drilling section;
S14: plugging the inspection hole;
wherein the inspection hole is arranged in a range of 30m above the bottom of the well wall of the well;
The number of each group of the inspection holes is 6, the heights of the 6 inspection holes are the same, and the 6 inspection holes are arranged along the circumferential direction of the well wall of the drilling section;
The height difference of the two adjacent groups of inspection holes on the well wall of the drilling section is 3m-5m, and the projections of the two adjacent groups of inspection holes on the vertical direction are not overlapped;
And the inspection hole passes through the well wall of the drilling section and the filling layer of the well wall of the drilling section at the same time.
8. The method of claim 6, wherein the zonal breaking of the borehole wall base comprises:
S21: establishing a rectangular coordinate system on the upper surface of the well wall bottom of the well, taking the circle center of the upper surface of the well wall bottom of the well as the origin of the rectangular coordinate system, and establishing an x axis and a y axis on the basis of the origin;
s22: dividing the upper surface of the well wall bottom of the well into a first area, a second area, a third area and a fourth area with the same area according to the rectangular coordinate system, wherein the first area is an area between a function y=0 and a function y= -x in the rectangular coordinate system, the second area is an area between the function y=0 and the function y=x in the rectangular coordinate system, the third area is an area between the function x=0 and the function y=x in the rectangular coordinate system, and the fourth area is an area between the function x=0 and the function y= -x in the rectangular coordinate system;
S23: and blasting the first area, the third area, the fourth area and the second area in sequence.
9. The construction method of a double-wall seat structure according to claim 6, wherein the thickness of each pouring of the concrete is not more than 300mm, the vibration distribution interval of the concrete is 300-400 mm, and the temperature range of the concrete entering the auxiliary wall seat template is 15-20 ℃.
10. The method for constructing a double-wall seat structure according to claim 6, wherein,
The I-steel pile comprises a plurality of steel beams, and the upper ends of the steel beams are supported on the lower end face of the well wall of the drilling section;
And the connection mode among the plurality of steel beams is welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111243138.0A CN113847036B (en) | 2021-10-25 | 2021-10-25 | Double-wall seat structure for deep drilling shaft after breaking bottom of well wall and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111243138.0A CN113847036B (en) | 2021-10-25 | 2021-10-25 | Double-wall seat structure for deep drilling shaft after breaking bottom of well wall and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113847036A CN113847036A (en) | 2021-12-28 |
| CN113847036B true CN113847036B (en) | 2024-09-17 |
Family
ID=78982881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111243138.0A Active CN113847036B (en) | 2021-10-25 | 2021-10-25 | Double-wall seat structure for deep drilling shaft after breaking bottom of well wall and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113847036B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150175A (en) * | 2018-01-04 | 2018-06-12 | 晋城煤炭规划设计院 | Shaft of vertical well passes through the supporting construction of the old dead zone in coal seam |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1153794A (en) * | 1956-06-12 | 1958-03-21 | Reinforced concrete casing for shaft sinking by blasting | |
| US3645102A (en) * | 1970-12-28 | 1972-02-29 | Commercial Shearing | Telescoping lining and support structure and method for lining tunnels and shafts |
| CN101598022A (en) * | 2009-05-13 | 2009-12-09 | 隋忠良 | The job practices of vertical simultaneous drifting |
| CN201546729U (en) * | 2009-11-13 | 2010-08-11 | 安徽理工大学 | Novel shaft lining structure at ingate position of deep coal mine well |
| CN102635231B (en) * | 2012-04-13 | 2014-06-04 | 中铁十七局集团第三工程有限公司 | Self-stabilization support system for inner film of circular reinforced concrete structure |
| CN203614107U (en) * | 2013-09-10 | 2014-05-28 | 安徽理工大学 | Composite retaining structure for horsehead |
| CN103470270B (en) * | 2013-09-10 | 2015-04-08 | 安徽理工大学 | Deep well ingate supporting structure and construction method thereof |
| CN203547753U (en) * | 2013-11-11 | 2014-04-16 | 煤炭工业济南设计研究院有限公司 | Profile steel concrete shaft wall base |
| CN104533425B (en) * | 2015-01-04 | 2017-02-22 | 中煤能源黑龙江煤化工有限公司 | Vertical shaft overall pouring section walling crib and vertical shaft overall pouring section walling crib construction method |
| CN204357437U (en) * | 2015-01-04 | 2015-05-27 | 中煤能源黑龙江煤化工有限公司 | A kind of vertical monobloc cast section wall seat |
| CN204551486U (en) * | 2015-03-25 | 2015-08-12 | 中国建筑西南勘察设计研究院有限公司 | Anchor rod type advanced tubule and injection steel bar concrete cylindrical thin wall foundation pit supporting construction |
| CN205503162U (en) * | 2016-03-02 | 2016-08-24 | 中铁第一勘察设计院集团有限公司 | Smoke shaft of hunch portion in existing trimmed tunnel |
| CN107035376B (en) * | 2017-05-19 | 2019-04-09 | 陕西长武亭南煤业有限责任公司 | One kind common law in huge thick bedrock aquifer digs shaft construction method |
| CN107701202A (en) * | 2017-08-30 | 2018-02-16 | 煤炭工业济南设计研究院有限公司 | The construction method of gear type underground coal bulkhead seat and coal bunker wall with the wall seat |
| CN109826654A (en) * | 2019-03-12 | 2019-05-31 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel ventilation well supporting construction and its construction method |
| CN213205673U (en) * | 2020-07-10 | 2021-05-14 | 中煤第三建设集团机电安装工程有限责任公司 | Quick shutoff construction system of vertical shaft pit roof beam nest |
| CN213510609U (en) * | 2020-08-24 | 2021-06-22 | 中国恩菲工程技术有限公司 | Well neck |
-
2021
- 2021-10-25 CN CN202111243138.0A patent/CN113847036B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150175A (en) * | 2018-01-04 | 2018-06-12 | 晋城煤炭规划设计院 | Shaft of vertical well passes through the supporting construction of the old dead zone in coal seam |
Non-Patent Citations (6)
| Title |
|---|
| 徐华生等.极复杂条件下井筒施工技术研究及工程应用.《安徽理工大学学报》.2012,第164-167页. * |
| 板集煤矿副井钻井法到凿井法工序安全快速转换;施建达等;《煤》;第71-73页 * |
| 极复杂条件下井筒施工技术研究及工程应用;徐华生等;《安徽理工大学学报》;第164-167页 * |
| 深表土冻结井筒壁座设计的改进;许焕彬等;《煤矿设计》;第44-48页 * |
| 袁店二矿基岩段掘砌破钻井锅底施工技术研究;徐吉鹏等;《能源技术与管理》;第153-154页 * |
| 许疃煤矿主井破底爆破施工技术;王芝宝等;《煤矿爆破》;第29-31页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113847036A (en) | 2021-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104612695B (en) | One acutely collapses shaft wall restoring and fastening method | |
| CN102322058B (en) | Construction process and equipment for downhole impacting high-pressure jet grouting pile | |
| CN112554177B (en) | Construction method of ultra-long small-diameter cast-in-situ bored pile | |
| CN104695963B (en) | The construction method of subway tunnel crossing building in fragmentation rock stratum | |
| CN109026026A (en) | Under wear existing piping lane the multi-thread more arcading bored tunnel groups of big cross section construction method | |
| CN112412467B (en) | Construction method of ventilation vertical shaft (200-600 m) with extra-long highway tunnel by' well reversing method | |
| CN112593943A (en) | Vertical shaft neck section well wall structure in thick water-containing backfill soil layer and construction method | |
| CN112900468A (en) | Bridge foundation construction method suitable for complex geological conditions | |
| CN115821985A (en) | Integrated construction method for auxiliary structure of subway open cut station | |
| CN109989756B (en) | Method for preventing water inrush and sand collapse of thick-surface-soil thin-bedrock drilling shaft | |
| CN209508992U (en) | A kind of underwater embedding rock steel sheet pile cofferdam structure | |
| CN107227958B (en) | Well wall structure of vertical well neck section high-spraying curtain pile, construction device and construction method | |
| CN113847036B (en) | Double-wall seat structure for deep drilling shaft after breaking bottom of well wall and construction method | |
| CN113863273A (en) | Construction method of bored pile adjacent to operation railway | |
| CN113338950A (en) | Shield closed arrival construction method of freezing method and cement system combined steel sleeve | |
| CN113982639B (en) | Tunnel lining full-ring dismantling and replacing construction method in unfavorable geological region | |
| CN114575746A (en) | Construction method for natural gas pipeline reverse well drilling crossing | |
| CN115653617A (en) | Construction method of covering layer shallow-buried tunnel | |
| CN108708370B (en) | Pile hole construction process for bridge pile foundation in alpine region | |
| CN117248915B (en) | Method for constructing drift sand stratum roadway | |
| CN109440801A (en) | A kind of reinforcement for pile foundation | |
| CN109469080A (en) | A kind of embedding rock steel sheet pile cofferdam structure and its construction method under water | |
| CN113123793B (en) | Weak stratum vertical shaft derrick structure and construction method thereof | |
| CN117868835A (en) | Rapid construction method for large-diameter vertical shaft of water-rich weakly cemented stratum | |
| CN214035738U (en) | Tunnel ventilation shaft swift current waste rock hole safety device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |