CN113338944A - Contractible well wall joint suitable for deep stratum and construction method thereof - Google Patents
Contractible well wall joint suitable for deep stratum and construction method thereof Download PDFInfo
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- CN113338944A CN113338944A CN202110705700.0A CN202110705700A CN113338944A CN 113338944 A CN113338944 A CN 113338944A CN 202110705700 A CN202110705700 A CN 202110705700A CN 113338944 A CN113338944 A CN 113338944A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/11—Lining shafts; Linings therefor with combinations of different materials, e.g. wood, metal, concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention discloses a contractible well wall joint suitable for deep strata, which comprises a joint upper assembly, a joint lower assembly and a joint upper assembly, wherein the joint upper assembly comprises an upper flange plate and an upper welding structure connected with the upper flange plate; the joint lower assembly comprises a lower flange plate and a lower welding structure connected with the lower flange plate; a first supporting plate is arranged between the upper flange plate and the lower welding structure, and a second supporting plate is arranged between the lower flange plate and the lower welding structure; according to the invention, the plurality of the retractable joints are vertically arranged on the well wall, so that the vertical additional force vertically acting on the well wall can be effectively reduced, and the safety of the well wall structure is ensured. The implementation of this technique, the effectual destruction that prevents the wall of a well structure and take place because of vertical force effect has saved the later maintenance expense of wall of a well structure, has guaranteed that the safety of coal mine excavation goes on.
Description
Technical Field
The invention relates to the field of mine construction, in particular to a contractible borehole wall joint suitable for deep strata.
Background
Since the 80 s of the last century, a large number of vertical shaft well wall fracture accidents (more than 150 according to statistics) occur in mining areas such as Anhui, Shuzhou, Henan Yongxia, Shandong Yanzhou, Heilongdong and the like in China successively, light people generate phenomena such as well wall concrete cracking and peeling, reinforcing steel bar bending and exposing, vertical shaft deformation, water burst, tank blockage and the like, heavy people cause major safety accidents such as well wall fracture, water burst and sand collapse, well flooding, industrial and wide ground surface settlement, ground building cracking, mine production stoppage and the like, great economic loss is brought to coal mines, and coal mine safety production and worker personal safety are seriously threatened.
On-site observation shows that the vertical shaft well wall fracture zones are all generated near the interface of the topsoil layer and the weathered bedrock section, most of the vertical shaft well wall fracture zones are in aquifers at the bottom of the topsoil layer, and the few vertical shaft well wall fracture zones are in the weathered bedrock section. According to the fracture position and the fracture form of the vertical shaft well wall, the fracture mechanism of the vertical shaft well wall during the production operation of a mine is disclosed, namely a bottom aquifer which penetrates through a topsoil layer of the fractured well wall directly covers a weathered bedrock section, the bottom aquifer is lack of a water-resisting layer and is in hydraulic connection with an underlying coal-based rock layer, the water level of the bottom aquifer is reduced along with drainage produced by mining of the mine, the bottom aquifer is solidified, compressed and settled, and the overlying strata are settled along with the consolidation and compression settlement. The vertical additional forces acting on the wellbore (negative friction) due to the hydrophobic settling of the formation are the main cause of the fracture of the walls of the vertical shaft.
In the prior art, the retractable joint structure of the well wall of the well drilling well is in a form that an arc outer ring is adopted to support lateral earth pressure, an inner vertical plate ring and an outer vertical plate ring are adopted to bear vertical load, and two retractable joint structures are adopted as shown in attached figures 4-5; it has the following disadvantages: 1) the stagnant water effect can't be guaranteed after the joint design compression: the joint is easy to leak water after being compressed; 2) poor adaptability to deep formations: the joint structure bears smaller vertical bearing capacity; 3) the construction convenience is poor: the requirement on the welding quality of each steel plate is high because the requirement on water stopping is ensured.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above problems occurring in the prior art and/or the problems occurring in the prior art.
Therefore, the technical problem to be solved by the invention is that the water stopping effect cannot be ensured after the joint structure is compressed: the joint is easy to leak water after being compressed.
In order to solve the technical problems, the invention provides the following technical scheme: a contractible well wall joint suitable for deep stratum comprises an upper joint assembly, a lower joint assembly and a joint body assembly, wherein the upper joint assembly comprises an upper flange plate and an upper welding structure connected with the upper flange plate; the joint lower assembly comprises a lower flange plate and a lower welding structure connected with the lower flange plate; the upper flange plate and the lower welding structure are provided with a first supporting plate therebetween, and the lower flange plate and the lower welding structure are provided with a second supporting plate therebetween.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: the upper welding structure is annular and comprises a first annular vertical plate connected with the lower surface of the upper flange plate, a first annular horizontal plate connected with the first annular vertical plate and a first annular inclined plane connected with the first annular horizontal plate, and the other end of the first annular inclined plane is connected to the lower surface of the upper flange plate.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: the lower welding structure is annular and comprises a second annular vertical plate connected with the upper surface of the lower flange plate, a second annular horizontal plate connected with the second annular vertical plate and a second annular inclined surface connected with the second annular horizontal plate, and the other end of the second annular inclined surface is connected to the upper surface of the lower flange plate.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: the cross section of a space enclosed by the upper flange plate and the upper welding structure is in a right trapezoid shape; the cross section of a space enclosed by the lower flange plate and the lower welding structure is in a right trapezoid shape.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: the first annular vertical plate is positioned below the upper flange plate, the second annular vertical plate is positioned above the lower flange plate, and the second annular inclined surface is parallel to the first annular inclined surface.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: the side surface of the first annular inclined surface, which is close to the second annular inclined surface, is connected with a circle of sealing ring, and the surface of the sealing ring is arc-shaped.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: an arc-shaped plate is arranged between the lower surface of the upper flange plate and the second annular horizontal plate, the arc-shaped plate is annular as a whole, and the cross section of the arc-shaped plate is arc-shaped.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: the first annular vertical plate is provided with a first grouting hole, and the second annular vertical plate is provided with a second grouting hole.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: the first support plate is provided with a first injection hole, and the second support plate is provided with a second injection hole.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: an inner vertical plate is arranged between the lower flange plate and the first annular horizontal plate, and is provided with an asphalt hole; the inner vertical plate is annular and the diameter of the inner vertical plate is smaller than that of the second supporting plate.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: the lower flange plate is connected with an annular steel base plate, and the inner side edge of the annular steel base plate is provided with a vibrating hole.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: the upper surface of the upper flange plate is connected with a first waterproof steel ring, and the lower surface of the annular steel cushion plate is connected with a second waterproof steel ring.
As a preferable mode of the contractible borehole wall joint applicable to deep strata according to the invention, wherein: the construction method of the contractible borehole wall joint suitable for the deep stratum comprises the following operation steps:
s1: preparing before construction, welding a second waterproof steel ring on the annular steel backing plate, and inserting the second waterproof steel ring into a well wall when the well wall is constructed;
s2: welding the lower flange plate and the annular steel base plate, arranging welding points on the inner side of the shaft, injecting concrete into the lower flange plate, vibrating the concrete through vibrating holes, welding the lower welding structure and the lower flange plate, and welding one end of the inner-layer vertical plate and one end of the second support plate on the lower flange plate;
s3: welding one end of the first supporting plate on the second annular horizontal plate, completing welding of the upper welding structure, the first waterproof steel ring and the upper flange plate, welding the sealing ring on the first annular inclined plane, and completing welding of the other ends of the first supporting plate, the second supporting plate and the inner vertical plate and the upper joint assembly on the upper part;
s4: welding one end of the arc-shaped plate on the upper flange plate, and welding the other end of the arc-shaped plate on the second annular horizontal plate;
s5: after the structure of each part is assembled, hot asphalt is injected through a first injection hole and a second injection hole which are communicated with each other, and then concrete grout is injected into the upper welding structure and the lower welding structure through the first grouting hole and the second grouting hole of the two concrete grouting holes;
s6: and (3) injecting concrete into the upper flange plate, vibrating through the vibrating holes, and inserting the first waterproof steel ring into the well wall when the upper well wall is poured.
The invention has the beneficial effects that:
1) according to the invention, the plurality of the retractable joints are vertically arranged on the well wall, so that the vertical additional force vertically acting on the well wall can be effectively reduced, and the safety of the well wall structure is ensured. The implementation of this technique, the effectual destruction that prevents the wall of a well structure and take place because of vertical force effect has saved the later maintenance expense of wall of a well structure, has guaranteed that the safety of coal mine excavation goes on.
2) The water-stopping device has a high water-stopping effect after the structure is compressed, and the water-stopping effect of the contractible structure after the compression deformation is ensured through the optimized design of the internal structure and the application of the physical and mechanical properties of the material.
3) The invention can be suitable for the deep well wall structure with larger vertical pressure, and improves the vertical limit bearing capacity of the contractible joint structure through the optimized design of the internal structure and the application of the physical and mechanical properties of the material.
4) The invention has lower requirements on the quality of construction welding, and reduces the requirements on the welding quality of the structure through the optimized design of the internal structure and the application of the physical and mechanical properties of the material.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a schematic cross-sectional view of a collapsible well wall joint for deep earth formations according to an embodiment of the present invention;
FIG. 2 is a cross section of a broken retractable well wall joint in a retractable well wall joint suitable for deep formations according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an annular pad in a contractible borehole wall joint for deep formations according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a scenario A according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a solution B according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration when describing the embodiments of the present invention, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 to 3, the embodiment provides a contractible borehole wall joint suitable for deep formations, which includes an upper joint component 100 and a lower joint component 200, where the upper joint component 100 and the lower joint component 200 form a contractible borehole wall joint, and the whole joint is annular; the joint upper assembly 100 comprises an upper flange plate 101 and an upper welding structure 102 connected with the upper flange plate 101, wherein the upper flange plate 101 is annular, and the upper welding structure 102 is also annular; the lower joint component 200 comprises a lower flange plate 201 and a lower welding structure 202 connected with the lower flange plate 201, wherein the flange plate 201 is an annular plate, and the lower welding structure 202 is also annular; a first supporting plate 103 is arranged between the upper flange plate 101 and the lower welding structure 202, a second supporting plate 203 is arranged between the lower flange plate 201 and the lower welding structure 202, the first supporting plate 103 and the second supporting plate 203 are annular rings, and the connecting mode adopts welding.
Further, the upper welding structure 102 is ring-shaped, and includes a first annular vertical plate 102a connected to the lower surface of the upper flange 101, a first annular horizontal plate 102b connected to the first annular vertical plate 102a, and a first annular inclined surface 102c connected to the first annular horizontal plate 102b, where the other end of the first annular inclined surface 102c is connected to the lower surface of the upper flange 101, the first annular vertical plate 102a is welded to the inner edge of the upper flange 101, the axis of the first annular vertical plate is perpendicular to the upper flange 101, and the first annular horizontal plate 102b is welded in parallel to the first annular vertical plate 102 a.
Correspondingly, the lower welding structure 202 is annular and includes a second annular vertical plate 202a connected to the upper surface of the lower flange 201, a second annular horizontal plate 202b connected to the second annular vertical plate 202a, and a second annular inclined surface 202c connected to the second annular horizontal plate 202b, where the other end of the second annular inclined surface 202c is connected to the upper surface of the lower flange 201, that is, one end of the second annular vertical plate 202a is welded to the outer edge of the lower flange 201, and the second annular horizontal plate 202b is parallel to the lower flange 201.
The cross section of a space defined by the upper flange plate 101 and the upper welding structure 102 is in a right trapezoid shape; the cross section of the space surrounded by the lower flange 201 and the lower welding structure 202 is in a right trapezoid shape, namely the vertical cross sections of the second annular inclined surface 202c and the first annular inclined surface 102c are not horizontal or vertical, the inclined cross sections are inclined, and the inclined angle is preferably 45-60 degrees to the horizontal plane. The first annular inclined surface 102c and the second annular inclined surface 202c are conical surfaces, the diameter of one end, in contact with the upper flange plate 101, of the first annular inclined surface 102c is larger than that of one end, connected with the first annular horizontal plate 102b, of the first annular inclined surface 102c, and the structure of the first annular inclined surface 102c is consistent with that of the second annular inclined surface 202 c.
It should be noted that the first annular riser 102a is located inside the upper flange 101, the second annular riser 202a is located outside the lower flange 201, and the vertical cross section of the second annular inclined surface 202c is parallel to the vertical cross section of the first annular inclined surface 102 c.
Preferably, a circle of sealing ring 300 is connected to a side surface of the first annular inclined surface 102c close to the second annular inclined surface 202c, and a surface of the sealing ring 300 is arc-shaped, wherein the sealing ring 300 is made of copper because the material of copper is softer than that of steel; when a large longitudinal load occurs to the joint, the joint upper assembly 100 and the joint lower assembly 200 contract, and the sealing ring 300 on the first annular inclined surface 102c contacts and presses the second annular inclined surface 202c, so that the sealing ring 300 is tightly contacted with the second annular inclined surface 202c to form a waterproof sealing ring.
Further, be provided with arc 400 between upper flange 101 lower surface and the annular horizontal plate 202b of second, arc 400 is whole for the annular, and the cross section of arc 400 is arc, and the arc plays the effect of the vertical riser circle of thickening.
Further, the first annular vertical plate 102a is provided with a first grouting hole 102d, and the second annular vertical plate 202a is provided with a second grouting hole 202d for grouting mixed soil. The first support plate 103 is provided with a first injection hole 103a, and the second support plate 203 is provided with a second injection hole 203a for injecting the asphalt therethrough.
Preferably, an inner vertical plate 500 is arranged between the lower flange 201 and the first annular horizontal plate 102b, and the inner vertical plate 500 is provided with an asphalt hole 501; the inner vertical plate 500 is annular and has a diameter smaller than that of the second supporting plate 203, and the asphalt holes 501 are used for injecting asphalt.
Wherein, lower flange 201 is connected with annular steel backing plate 600, and annular steel backing plate 600 inboard edge is provided with the hole of vibrating 601 for vibrate inside concrete.
Furthermore, the upper surface of the upper flange plate 101 is connected with a first waterproof steel ring 700, and the lower surface of the annular steel liner plate 600 is connected with a second waterproof steel ring 800 which is used for being installed in a well wall and playing a waterproof role.
This embodiment is through vertical a plurality of yieldable joint that sets up at the wall of a well, can effectively reduce vertical additional force of vertical effect on the wall of a well, ensures the security of wall of a well structure, and the field test result shows that, under the effect of high vertical load, yieldable wall of a well connects good vertical yieldability, very high pressure relief ability, reliable waterproof ability. The implementation of the technology can effectively prevent the well wall structure from being damaged due to the action of vertical force, save the later maintenance cost of the well wall structure, ensure the safe operation of coal mine excavation, still have higher water stopping effect after the structure is compressed, and ensure the water stopping effect of the contractible structure after the compression deformation through the optimized design of the internal structure and the application of the physical and mechanical properties of materials; the method can be suitable for the deep well wall structure with large vertical pressure, and the vertical limit bearing capacity of the contractible joint structure is improved through the optimized design of the internal structure and the application of the physical and mechanical properties of the material.
Example 2
Referring to fig. 1 to 5, a second embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that:
in order to understand the mechanics and waterproof performance of the whole stress process of the contractible borehole wall joint, the joint provided by the embodiment and the two joints in the prior art respectively adopt the following loading models: (1) under the action of vertical load, the vertical deformation characteristic of the retractable joint model is tested; (2) under the action of lateral load, a strength test (plane strain) of a contractible joint model is carried out; (3) and (3) testing the strength of the retractable joint model under the action of the triaxial load.
Fig. 4 is a scheme a, fig. 5 is a scheme B, and the present application is a scheme C.
The joint in this example was simulated under conditions similar to those of the two joints of the prior art, and the dimensions of the vertical-loading yieldable joint model test pieces shown in table 1 were first obtained, and the test was performed on a 2000kN long column press, and the model dimensions were determined by the area of the press platen of the press, so that the geometric similarity ratio of the yieldable model dimensions was Cl 15.
TABLE 1
Table 2 shows the main parameters of the lateral loading retractable joint drilling well wall model test piece, in which a retractable joint is welded in the middle of the upper and lower sections of the ordinary double-layer steel plate concrete composite well wall (the upper and lower sections of the ordinary double-layer steel plate concrete composite well wall are also simulated according to the same shrinkage ratio) to form a retractable drilling well wall structure. The model material adopts A3 steel plate and C60 concrete. The geometric scale of the model test piece is as follows: cl-6700/925-7.243.
TABLE 2
Table 3 shows the main parameters of the triaxial loading yieldable joint drilling well wall model test piece, the model is made of the same material as the raw material, and the geometric shrinkage ratio of the model test piece is as follows: cl-6700/360-18.611.
TABLE 3
The test method is as follows:
(1) vertical loading test: 6 vertical resistance strain gauges are adhered to the inner main plate ring, the outer main plate ring and the arc-shaped plate of the processed model test piece along the circumferential direction so as to measure the stress condition of the model test piece in the loading process; arranging 4 resistance displacement meters around the model test piece to measure the compression of the model test piece, and adopting a data real-time acquisition and processing system to measure data;
(2) and (3) side loading test: the test is carried out in a well wall high-pressure loading device, rigid constraint is carried out by vertically utilizing a tightening screw, and uniform ground pressure is simulated by laterally applying hydraulic pressure; step-by-step voltage stabilization loading is adopted, each step of voltage stabilization is carried out for 10-20 min, the next step of loading is carried out after data acquisition is carried out until a test piece is damaged, and 4 vertical resistance type displacement meters are symmetrically arranged at a contractible joint of the test piece and used for measuring the vertical deformation characteristic of the test piece; respectively sticking 6 pieces of resistance strain patterns on an arc plate and an inner vertical ring of a retractable joint between the inner edge and the outer edge of the upper section well wall and the lower section well wall along the circumferential direction, and measuring the stress strain of the test piece structure in the loading process;
(3) and (3) triaxial loading test: the test is carried out in a triaxial high-pressure loading device of a well wall structure; firstly, a test piece is loaded into a loading device and then placed on a long column type press machine, wherein the oil pressure simulates horizontal ground pressure, and the pressure applied to the end face of a well wall test piece by the press machine simulates vertical load actually borne by a well wall; the test is carried out by firstly pressing in a vertical direction: the side pressure is 2: 1, when the lateral pressure value reaches the designed ground pressure value, the fixed lateral pressure is unchanged, and the vertical pressure is stably increased by classification until the compressible connector is compressed to the limit.
Table 4 is its vertical deformation compressibility load:
TABLE 4
| Retractable joint scheme | Vertical compression/mm | Vertical compression ratio/%) |
| B | 18.21 | 30.4 |
| C | 19.84 | 33.1 |
Table 4 shows that the retractable joint scheme of the scheme C has a large vertical deformation compression ratio, can effectively attenuate vertical additional force of the borehole wall, has a large lifting effect compared with the scheme B, and has great progress in both vertical compression amount and vertical compression ratio.
Table 5 shows the results of the triaxial loading contractible borehole wall model test:
TABLE 5
As can be seen from table 5, the compression ratio of the solution C, i.e., the compressible joint of this embodiment, is significantly greater than that of the solution B.
Table 6 shows the results of the critical load test of the triaxial loading retractable joint model test piece:
TABLE 6
As can be seen from the table 6, compared with the A, B schemes, the vertical critical load and the vertical stress of the concrete of the well wall are both larger than A, B schemes, the oil is not leaked when the pressure of the joint is compressed and damaged and the back side pressure is 18.4MPa, and the sealing effect is obviously improved. The joint of the embodiment is safer and more reliable than the A, B two solutions.
Then, the resistance to pressure measurement and the waterproofness are tested, table 7 shows the lateral loading contractible drilling well wall test results, wherein the waterproofness of the contractible joint can be respectively explained by the lateral pressure loading and triaxial loading test results, and table 7 shows that under the action of the lateral pressure, the oil leakage phenomenon does not occur at the contractible joint until the upper and lower well walls of the contractible joint are damaged:
TABLE 7
As can be seen from table 7, the solution C, i.e. the present application, is significantly superior to the solution B in the test of the waterproof performance, because when the joint is contracted, the sealing ring 300 on the first annular inclined surface 102C contacts and presses the second annular inclined surface 202C, so that the sealing ring 300 is in close contact with the second annular inclined surface 202C to form a waterproof sealing ring.
The field test result shows that under the action of high vertical load, the contractible well wall joint has good vertical contractibility, very high pressure relief capacity and reliable waterproof capacity, the water stopping effect of the contractible structure after compression deformation is ensured through the optimized design of the internal structure and the application of the physical and mechanical properties of the material, and the vertical limit bearing capacity of the contractible joint structure is improved through the optimized design of the internal structure and the application of the physical and mechanical properties of the material.
Example 3
Referring to fig. 1 to 3, a third embodiment of the present invention is based on the first embodiment, and is different from the previous embodiment in that:
the construction method of the contractible borehole wall joint suitable for the deep stratum comprises the following operation steps:
s1: preparing before construction, welding a second waterproof steel ring 800 on the annular steel base plate 600, and inserting the second waterproof steel ring 800 into a well wall when the well wall is constructed;
s2: welding the lower flange plate 201 and the annular steel base plate 600, arranging welding points on the inner side of a shaft, injecting concrete into the lower flange plate 201, vibrating the concrete through the vibrating holes 601, welding the lower welding structure 202 and the lower flange plate 201, and welding one end of the inner vertical plate 500 and one end of the second support plate 203 on the lower flange plate 201;
s3: welding one end of the first support plate 103 on the second annular horizontal plate 202b, completing welding of the upper welding structure 102, the first waterproof steel ring 700 and the upper flange plate 101, welding the sealing ring 300 on the first annular inclined surface 102c, and completing welding of the other ends of the first support plate 103 and the second support plate 203 and the upper joint component 100 on the upper part;
s4: welding one end of the arc-shaped plate 400 on the upper flange plate 101, and welding the other end of the arc-shaped plate 202b on the second annular horizontal plate;
s5: after the structures are assembled, hot asphalt is injected through the two first injection holes 103a and the second injection holes 203a of the asphalt hole 501, and then concrete grout is injected into the upper welding structure 102 and the lower welding structure 202 through the two first grouting holes 102d and the second grouting holes 202d of the concrete grouting holes;
s6: and (3) pouring concrete into the upper flange plate 101, vibrating through the vibrating holes 601, and inserting the first waterproof steel ring 700 into the well wall when the upper well wall is poured. All parts are connected by adopting a welding technology, and joints are arranged on the inner layer of a shaft wall of a shaft mostly.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (13)
1. A contractible borehole wall joint suitable for deep stratum which is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the joint upper assembly (100) comprises an upper flange plate (101) and an upper welding structure (102) connected with the upper flange plate (101);
the joint lower assembly (200) comprises a lower flange plate (201) and a lower welding structure (202) connected with the lower flange plate (201);
a first supporting plate (103) is arranged between the upper flange plate (101) and the lower welding structure (202), and a second supporting plate (203) is arranged between the lower flange plate (201) and the lower welding structure (202).
2. The retractable well wall joint suitable for use in deep earth formations of claim 1, wherein: the upper welding structure (102) is annular and comprises a first annular vertical plate (102a) connected with the lower surface of the upper flange plate (101), a first annular horizontal plate (102b) connected with the first annular vertical plate (102a), and a first annular inclined surface (102c) connected with the first annular horizontal plate (102b), wherein the other end of the first annular inclined surface (102c) is connected to the lower surface of the upper flange plate (101).
3. The retractable well wall joint suitable for use in deep earth formations of claim 2, wherein: the lower welding structure (202) is annular and comprises a second annular vertical plate (202a) connected with the upper surface of the lower flange plate (201), a second annular horizontal plate (202b) connected with the second annular vertical plate (202a), and a second annular inclined surface (202c) connected with the second annular horizontal plate (202b), and the other end of the second annular inclined surface (202c) is connected to the upper surface of the lower flange plate (201).
4. The retractable well wall joint suitable for use in deep earth formations of claim 3, wherein: the cross section of a space surrounded by the upper flange plate (101) and the upper welding structure (102) is in a right trapezoid shape; the cross section of a space surrounded by the lower flange plate (201) and the lower welding structure (202) is in a right trapezoid shape.
5. The contractible borehole wall joint for deep formations of claim 3 or 4, wherein: the first annular vertical plate (102a) is located below the upper flange plate (101), the second annular vertical plate (202a) is located above the lower flange plate (201), and the vertical cross section of the second annular inclined surface (202c) is parallel to the vertical cross section of the first annular inclined surface (102 c).
6. The contractible wellbore joint adapted for use in deep earth formations of claim 5, wherein: the side surface of the first annular inclined surface (102c) close to the second annular inclined surface (202c) is connected with a circle of sealing ring (300), and the surface of the sealing ring (300) is arc-shaped.
7. The retractable well wall joint suitable for use in deep earth formations of claim 6, wherein: an arc-shaped plate (400) is arranged between the lower surface of the upper flange plate (101) and the second annular horizontal plate (202b), the arc-shaped plate (400) is annular as a whole, and the cross section of the arc-shaped plate (400) is arc-shaped.
8. The contractible borehole wall joint for deep formations of any one of claims 2-4, 6, and 7, wherein: the first annular vertical plate (102a) is provided with a first grouting hole (102d), and the second annular vertical plate (202a) is provided with a second grouting hole (202 d).
9. The retractable well wall joint adapted for use in deep earth formations of claim 8, wherein: a first injection hole (103a) is formed in the first support plate (103), and a second injection hole (203a) is formed in the second support plate (203).
10. The contractible borehole wall joint for deep formations of any one of claims 2-4, 6-7, and 9, wherein: an inner vertical plate (500) is arranged between the lower flange plate (201) and the first annular horizontal plate (102b), and the inner vertical plate (500) is provided with an asphalt hole (501); the inner layer vertical plate (500) is annular and the diameter of the inner layer vertical plate is smaller than that of the second supporting plate (203).
11. The retractable well wall joint adapted for use in deep earth formations of claim 10, wherein: the lower flange plate (201) is connected with an annular steel base plate (600), and a vibrating hole (601) is formed in the edge of the inner side of the annular steel base plate (600).
12. The retractable well wall joint adapted for use in deep earth formations of claim 11, wherein: the upper surface of the upper flange plate (101) is connected with a first waterproof steel ring (700), and the lower surface of the annular steel base plate (600) is connected with a second waterproof steel ring (800).
13. A contractible well wall joint construction method suitable for deep stratum is characterized in that: the method comprises the following operation steps:
preparing before construction, welding a second waterproof steel ring (800) on the annular steel base plate (600), and inserting the second waterproof steel ring (800) into a well wall when the well wall is constructed;
welding a lower flange plate (201) and an annular steel base plate (600), arranging welding points on the inner side of a shaft, injecting concrete into the lower flange plate (201), vibrating the concrete through a vibrating hole (601), welding a lower welding structure (202) and the lower flange plate (201), and welding one end of an inner vertical plate (500) and one end of a second supporting plate (203) on the lower flange plate (201);
welding one end of a first supporting plate (103) on a second annular horizontal plate (202b), completing welding of an upper welding structure (102), a first waterproof steel ring (700) and an upper flange plate (101), welding a sealing ring (300) on a first annular inclined plane (102c), and completing welding of the other ends of the first supporting plate (103), a second supporting plate (203) and an inner vertical plate (500) and an upper joint component (100) at the upper part;
welding one end of an arc-shaped plate (400) on the upper flange plate (101), and welding the other end of the arc-shaped plate on a second annular horizontal plate (202 b);
after the structure of each part is assembled, hot asphalt is injected through two first injection holes (103a) and two second injection holes (203a) which are communicated with each other of an asphalt hole (501), and then concrete grout is injected into the upper welding structure (102) and the lower welding structure (202) through two first grouting holes (102d) and two second grouting holes (202d) of the concrete grouting holes;
and (3) pouring concrete into the upper flange plate (101), vibrating through the vibrating hole (601), and inserting the first waterproof steel ring (700) into the well wall when the upper well wall is poured.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110705700.0A CN113338944B (en) | 2021-06-24 | 2021-06-24 | Contractible well wall joint suitable for deep stratum and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110705700.0A CN113338944B (en) | 2021-06-24 | 2021-06-24 | Contractible well wall joint suitable for deep stratum and construction method thereof |
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| CN113338944B CN113338944B (en) | 2021-12-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01203590A (en) * | 1988-02-08 | 1989-08-16 | Shimizu Corp | Advancement and arrival of shield excavator in vertical shaft |
| CN101328054A (en) * | 2008-07-15 | 2008-12-24 | 安徽理工大学 | Novel slight expansion high strength internodal grouting material for high-strength drilling shaft lining |
| 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 |
| CN104453912A (en) * | 2014-11-25 | 2015-03-25 | 安徽恒源煤电股份有限公司 | Vertical reducible joint of freezing shaft wall |
-
2021
- 2021-06-24 CN CN202110705700.0A patent/CN113338944B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01203590A (en) * | 1988-02-08 | 1989-08-16 | Shimizu Corp | Advancement and arrival of shield excavator in vertical shaft |
| CN101328054A (en) * | 2008-07-15 | 2008-12-24 | 安徽理工大学 | Novel slight expansion high strength internodal grouting material for high-strength drilling shaft lining |
| 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 |
| CN104453912A (en) * | 2014-11-25 | 2015-03-25 | 安徽恒源煤电股份有限公司 | Vertical reducible joint of freezing shaft wall |
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| CN113338944B (en) | 2021-12-17 |
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