CN102913247B - Sinking well wall using drilling method and manufacturing method thereof - Google Patents
Sinking well wall using drilling method and manufacturing method thereof Download PDFInfo
- Publication number
- CN102913247B CN102913247B CN201210253143.4A CN201210253143A CN102913247B CN 102913247 B CN102913247 B CN 102913247B CN 201210253143 A CN201210253143 A CN 201210253143A CN 102913247 B CN102913247 B CN 102913247B
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- component
- borehole wall
- compressible
- joint
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Abstract
The invention discloses a sinking well wall using a drilling method and a manufacturing method of the sinking well wall using a drilling method, and relates to an underground well wall structure, which aims to solve the vertical compression of the well wall and reduce or avoid the joint crack between a compressible well wall joint and the other well wall due to tensile force. According to the sinking well wall using the drilling method, both ends of the compressible well wall joint are respectively connected with ordinary well walls; a first member is fixedly connected to the ordinary well wall at one end of the compressible well wall joint, and a second member is fixedly connected to the ordinary well wall at the other end of the compressible well wall joint; when the compressible well wall joint receives the pressure along the depth direction of the well wall, the first member and the second member move relatively; and when the compressible well wall joint receives the tensile force along the depth direction of the well wall, the first member and the second member are mutually matched to stop the relative movement of the first member and the second member. The invention is applicable to manufacture and apply the sinking well wall using the drilling method.
Description
Technical field
The present invention relates to missile silo wall construction, particularly relate to the sinking by boring borehole wall and manufacture method thereof with compressible borehole wall joint.
Background technology
At present, in sinking by boring construction, there is shaft rupture for preventing pit shaft in use because being subject to the impact of the vertical spectra that alluvium sedimentation produces, vertical compressible borehole wall joint is set in drilling shaft lining, realize the vertical integral compressible of drilling shaft lining, prevent shaft wall fracture.Fig. 1 is the structural representation of compressible borehole wall joint in prior art.Shown in Figure 1, compressible borehole wall joint 10 is welded to connect by flange with other boreholes wall 20,30.Here other boreholes wall are referred to as the common borehole wall, and be the borehole wall that this area is usually said, it is prefabricated that it is generally terrestrial segment, and borehole wall segmentation movement connects to import.
Realizing in process of the present invention, inventor finds under tension state, and the weld seam between compressible borehole wall joint and other boreholes wall is weak spot, easily occurs weld cracking, thus can application life of serious curtailment pit shaft.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of sinking by boring borehole wall and manufacture method thereof, the vertically compressible of the borehole wall can be realized, can reduce or avoid again the weld cracking between compressible borehole wall joint and other boreholes wall caused by Yin Lali, improve the application life of pit shaft.
For solving the problems of the technologies described above, the sinking by boring borehole wall of the present invention adopts following technical scheme:
A kind of sinking by boring borehole wall, comprise compressible borehole wall joint, the common borehole wall is connected at the two ends of described compressible borehole wall joint, the described common borehole wall and described compressible borehole wall joint are by being welded to connect, the common borehole wall of described compressible borehole wall joint one end is fixedly connected with the first component, the common borehole wall of the described compressible borehole wall joint other end is fixedly connected with second component;
When described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, described first component and second component can relative movements; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component cooperatively interact and hinder the relative movement of described first component and second component.
Preferably, described first component and second component are arranged on the lateral wall of the described common borehole wall; Wherein said first component is swallow-tail form component, and described second component is V-arrangement or del component, and the sidepiece of the dovetail part of described swallow-tail form component and the sidepiece of described V-arrangement or del component fit.
Preferably, described first component is at least two swallow-tail form components, is arranged side by side on the lateral wall of the described common borehole wall evenly and at intervals; Described second component is the one or more V-arrangement or del component that match with described at least two swallow-tail form components.
Wherein, the medial surface of described first component and second component is cambered surface; Described cambered surface matches with the cambered surface of the lateral wall of the described common borehole wall.
Wherein, the described common borehole wall is connected by flange welding with described compressible borehole wall joint.
Preferably, described first component and second component and the described common borehole wall are by being welded to connect, and weld bead height is 18-22mm.
Preferably, the angle of the dovetail part of described swallow-tail form component is 79 degree, and the angle between the side of described V-arrangement or del component and center line is 11 degree.
The sinking by boring borehole wall of the present invention, the common borehole wall of compressible borehole wall joint one end is fixedly connected with the first component, and the common borehole wall of the compressible borehole wall joint other end is fixedly connected with second component; And when described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, described first component and second component can relative movements; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component cooperatively interact and hinder the relative movement of described first component and second component, the bonding strength of reinforcement between compressible borehole wall joint and the common borehole wall.The vertically compressible of the borehole wall can be realized like this, can reduce or avoid again the weld cracking between compressible borehole wall joint and other boreholes wall, improve the application life of pit shaft.
For solving the problems of the technologies described above, the manufacture method of the sinking by boring borehole wall of the present invention adopts following technical scheme:
A manufacture method for the sinking by boring borehole wall, comprising:
At the two ends of compressible borehole wall joint, respectively by being welded to connect the common borehole wall;
The common borehole wall of described compressible borehole wall joint one end is fixedly connected with the first component, the common borehole wall of the described compressible borehole wall joint other end is fixedly connected with the second component matched with described first component; When described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, described first component and second component can relative movements; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component cooperatively interact and hinder the relative movement of described first component and second component.
Preferably, describedly on the common borehole wall of described compressible borehole wall joint one end, be fixedly connected with the first component, the common borehole wall of the described compressible borehole wall joint other end be fixedly connected with the second component matched with described first component, comprise:
On the lateral wall of the common borehole wall of described compressible borehole wall joint one end, weld the swallow-tail form component as described first component; On the lateral wall of the common borehole wall of the described compressible borehole wall joint other end, weld the V-arrangement as described second component or del component, and the sidepiece of the dovetail part of described swallow-tail form component and the sidepiece of described V-arrangement or del component are fitted.
Preferably, on the lateral wall of the described common borehole wall in described compressible borehole wall joint one end, the swallow-tail form component welded as described first component comprises:
On the lateral wall of the common borehole wall of described compressible borehole wall joint one end, weld at least two swallow-tail form components as described first component evenly and at intervals side by side.
Preferably, after second component welds, weld the first component again, and welding after the first component being adjacent to second component.
The manufacture method of the sinking by boring borehole wall of the present invention, the common borehole wall of described compressible borehole wall joint one end is fixedly connected with the first component, the common borehole wall of the described compressible borehole wall joint other end is fixedly connected with the second component matched with described first component; When described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, described first component and second component can relative movements; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component cooperatively interact and hinder the relative movement of described first component and second component, the bonding strength of reinforcement between compressible borehole wall joint and the common borehole wall.The vertically compressible of the borehole wall can be realized like this, can reduce or avoid again the weld cracking between compressible borehole wall joint and other boreholes wall, improve the application life of pit shaft.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of compressible borehole wall joint in prior art;
Fig. 2 is the structural representation of sinking by boring borehole wall embodiment of the present invention;
Fig. 3 is that on the sinking by boring borehole wall of the present invention, first component and second component cooperatively interact the expansion schematic diagram of structure;
Fig. 4 is the structural representation of the first component on the sinking by boring borehole wall of the present invention;
Fig. 5 for the first component shown in Fig. 4 with the use of the structural representation of second component;
Fig. 6 is that on the sinking by boring borehole wall of the present invention, first component and second component cooperatively interact the structural representation of another embodiment of structure.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the invention is described in detail.Should be clear and definite, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 2 is the structural representation of sinking by boring borehole wall embodiment of the present invention.Shown in Fig. 2, the specific embodiment of the invention sinking by boring borehole wall, comprise compressible borehole wall joint 10, the common borehole wall 20,30 is connected at the two ends of described compressible borehole wall joint, the described common borehole wall and described compressible borehole wall joint are by being welded to connect, the common borehole wall 20 of described compressible borehole wall joint 10 one end is fixedly connected with the first component 1, the common borehole wall 30 of described compressible borehole wall joint 10 other end is fixedly connected with second component 2; When described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, described first component and second component can relative movements; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component cooperatively interact and hinder the relative movement of described first component and second component, that is, when described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component can realize self-locking.
Wherein compressible borehole wall joint is except adopting the structure shown in Fig. 1 and Fig. 2, and the label 11 in Fig. 2 is the arc of compressible borehole wall joint.In addition, compressible borehole wall joint also can adopt other compressible borehole wall joints of the prior art, and such as, in the CN2782930Y Chinese patent application that employing publication number is, the disclosed board-like borehole wall of Curved arc can shrinking structure.
The described common borehole wall and described compressible borehole wall joint are welded to connect by flange, to improve the area of the contact surface of the common borehole wall and described compressible borehole wall joint, improve bonding strength.
Sinking by boring borehole wall detailed description of the invention of the present invention, the common borehole wall of compressible borehole wall joint one end is fixedly connected with the first component, and the common borehole wall of the compressible borehole wall joint other end is fixedly connected with second component; And when described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, described first component and second component can relative movements, can not affect the vertical compression of compressible borehole wall joint; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component cooperatively interact and hinder the relative movement of described first component and second component, the bonding strength of reinforcement between compressible borehole wall joint and the common borehole wall.The vertically compressible of the borehole wall can be realized like this, can reduce or avoid again the weld cracking between compressible borehole wall joint and other boreholes wall, improve the application life of pit shaft.
Fig. 4 is the structural representation of the first component on the sinking by boring borehole wall of the present invention; Fig. 5 for the first component shown in Fig. 4 with the use of the structural representation of second component.Shown in Fig. 4 and Fig. 5, in the detailed description of the invention of the sinking by boring borehole wall of the present invention, described first component 1 and second component 2 are preferably placed on the lateral wall of the described common borehole wall; Wherein said first component 1 is swallow-tail form tabular component, and described second component 2 is V-arrangement or del component, the v-component shown in Fig. 5.The sidepiece of the dovetail part of described swallow-tail form component and the sidepiece of described V-arrangement or del component fit.Described first component adopts swallow-tail form component, is conducive to the intensity of enhancing first component and second component self-locking, reduces the inefficacy causing the first component and second component self-locking because described pulling force is excessive.
Wherein, described swallow-tail form tabular component can be one or more, and accordingly, the described V-arrangement matched with described swallow-tail form component or del component also can be one or more.Preferably, described first component is at least two swallow-tail form components, is arranged side by side on the lateral wall of the described common borehole wall evenly and at intervals; Described second component is the one or more V-arrangement or del component that match with described at least two swallow-tail form components.Fig. 3 is that on the sinking by boring borehole wall of the present invention, first component and second component cooperatively interact the expansion schematic diagram of structure.Mark 3 and 4 represents weld seam respectively.Described first component is at least two swallow-tail form components, be arranged side by side on the lateral wall of the described common borehole wall evenly and at intervals, and match with one or more V-arrangement or del component, can evenly share described vertical tension, more advantageously reduce or prevent the weld cracking between compressible borehole wall joint and other boreholes wall, improving the application life of pit shaft.Described second component adopts v-shaped structure, is convenient to weld seam and arranges, namely can in the zone line welding of v-shaped structure.
For the ease of the coordinating of lateral wall of described first component and second component and the described common borehole wall, and be convenient to welding, the medial surface of described first component and second component is preferably cambered surface; Described cambered surface matches with the cambered surface of the lateral wall of the described common borehole wall.
In the detailed description of the invention of the sinking by boring borehole wall of the present invention, the material of described first component and second component can be Q345.Described first component and second component and the described common borehole wall are by being welded to connect, and weld bead height is 18-22mm, are preferably 20mm.Weld bead height lower than 18mm, is then unfavorable for ensureing higher bonding strength, and weld bead height is higher than 22mm, then the residual stress of welding is larger.
In the detailed description of the invention of the sinking by boring borehole wall of the present invention, the angle α of the dovetail part of described swallow-tail form component is 79 degree, and the angle β between the side of described V-arrangement or del component and center line is 11 degree.The setting of this angle, both be conducive to realizing being conducive to when described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and the mutual self-locking of second component, hinder the relative movement of described first component and second component, make again the dovetail part of described swallow-tail form component have good opposing External Force Acting and prevent the effect of distortion.
Fig. 6 is that on the sinking by boring borehole wall of the present invention, first component and second component cooperatively interact the structural representation of another embodiment of structure.Shown in Fig. 6, in the detailed description of the invention of the sinking by boring borehole wall of the present invention, described first component and second component are preferably placed on the lateral wall of the described common borehole wall; Wherein said first component is the microscler plate of 1 employing, and this microscler plate is provided with several teeth portion tilted towards same direction; Described second component 2 can be provided with bearing 5, bearing 5 to be rotatably connected positioning element 7 by rotating shaft 6, between described positioning element 7 and rotating shaft 6, spring (not shown) to be installed.Described positioning element 7 is a lever, when described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, can slide on several teeth portion tops on described first component in one end of the positioning element 7 on described second component, make described first component and second component can relative movement thus, the vertical compression of compressible borehole wall joint can not be affected; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, positioning element on described second component is under the effect of elastic force, described end enters in the groove between adjacent fingers, thus hinders the relative movement of described first component and second component.Cover body (not shown) is provided with between described first component and second component, for the material such as detritus, silt of positioning element 7 and the teeth portion be mated and borehole wall periphery is kept apart, to keep the regular event of described positioning element 7 not by the interference of the materials such as outside detritus, silt.
The specific embodiment of the present invention also discloses a kind of manufacture method of the sinking by boring borehole wall, comprises step:
S1, two ends at compressible borehole wall joint, respectively by being welded to connect the common borehole wall;
S2, on the common borehole wall of described compressible borehole wall joint one end, be fixedly connected with the first component, the common borehole wall of the described compressible borehole wall joint other end is fixedly connected with the second component matched with described first component; When described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, described first component and second component can relative movements; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component cooperatively interact and hinder the relative movement of described first component and second component.
The manufacture method of the sinking by boring borehole wall of the present invention, the common borehole wall of described compressible borehole wall joint one end is fixedly connected with the first component, the common borehole wall of the described compressible borehole wall joint other end is fixedly connected with the second component matched with described first component; When described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, described first component and second component can relative movements; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component cooperatively interact and hinder the relative movement of described first component and second component, the bonding strength of reinforcement between compressible borehole wall joint and the common borehole wall.The vertically compressible of the borehole wall can be realized like this, can reduce or avoid again the weld cracking between compressible borehole wall joint and other boreholes wall, improve the application life of pit shaft.
In the manufacture method detailed description of the invention of the sinking by boring borehole wall of the present invention, preferably, describedly on the common borehole wall of described compressible borehole wall joint one end, be fixedly connected with the first component, the common borehole wall of the described compressible borehole wall joint other end is fixedly connected with the second component matched with described first component, comprises:
On the lateral wall of the common borehole wall of described compressible borehole wall joint one end, weld the swallow-tail form component as described first component; On the lateral wall of the common borehole wall of the described compressible borehole wall joint other end, weld the V-arrangement as described second component or del component, and the sidepiece of described swallow-tail form component and the sidepiece of described V-arrangement or del component are fitted.
Preferably, on the lateral wall of the described common borehole wall in described compressible borehole wall joint one end, the swallow-tail form component welded as described first component comprises: on the lateral wall of the common borehole wall of described compressible borehole wall joint one end, weld at least two swallow-tail form components as described first component evenly and at intervals side by side.
In the manufacture method detailed description of the invention of the sinking by boring borehole wall of the present invention, after second component welds, weld the first component again, and welding after the first component being adjacent to second component, be convenient to the positioning welding of second component like this.
In the manufacture method detailed description of the invention of the sinking by boring borehole wall of the present invention, the form of structure of described first component and second component and the advantage had thereof are not limited thereto, can referring to the form of structure described in the above-mentioned sinking by boring borehole wall and advantage thereof.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (8)
1. a sinking by boring borehole wall, comprise compressible borehole wall joint, the common borehole wall is connected at the two ends of described compressible borehole wall joint, the described common borehole wall and described compressible borehole wall joint are by being welded to connect, it is characterized in that, the common borehole wall of described compressible borehole wall joint one end is fixedly connected with the first component, the common borehole wall of the described compressible borehole wall joint other end is fixedly connected with second component;
When described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, described first component and second component can relative movements; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component cooperatively interact and hinder the relative movement of described first component and second component;
Described first component and second component are arranged on the lateral wall of the described common borehole wall; Wherein
Described first component is swallow-tail form component, and described second component is V-arrangement or del component, and the sidepiece of the dovetail part of described swallow-tail form component and the sidepiece of described V-arrangement or del component fit.
2. the sinking by boring borehole wall according to claim 1, is characterized in that, described first component is at least two swallow-tail form components, is arranged side by side on the lateral wall of the described common borehole wall evenly and at intervals;
Described second component is the one or more V-arrangement or del component that match with described at least two swallow-tail form components.
3. the sinking by boring borehole wall according to claim 1, is characterized in that, the medial surface of described first component and second component is cambered surface;
Described cambered surface matches with the cambered surface of the lateral wall of the described common borehole wall.
4. the sinking by boring borehole wall according to any one of claims 1 to 3, is characterized in that,
The described common borehole wall is connected by flange welding with described compressible borehole wall joint.
5. the sinking by boring borehole wall according to any one of claims 1 to 3, is characterized in that, described first component and second component and the described common borehole wall are by being welded to connect, and weld bead height is 18-22mm.
6. the sinking by boring borehole wall according to any one of claims 1 to 3, is characterized in that, the angle of the dovetail part of described swallow-tail form component is 79 degree, and the angle between the side of described V-arrangement or del component and center line is 11 degree.
7. a manufacture method for the sinking by boring borehole wall, is characterized in that, comprising:
At the two ends of compressible borehole wall joint, respectively by being welded to connect the common borehole wall;
The common borehole wall of described compressible borehole wall joint one end is fixedly connected with the first component, the common borehole wall of the described compressible borehole wall joint other end is fixedly connected with the second component matched with described first component; When described compressible borehole wall joint is subject to the pressure along the depth direction of the described borehole wall, described first component and second component can relative movements; When described compressible borehole wall joint is subject to the pulling force along the depth direction of the described borehole wall, described first component and second component cooperatively interact and hinder the relative movement of described first component and second component; Wherein
Describedly on the common borehole wall of described compressible borehole wall joint one end, be fixedly connected with the first component, the common borehole wall of the described compressible borehole wall joint other end be fixedly connected with the second component matched with described first component, comprise:
On the lateral wall of the common borehole wall of described compressible borehole wall joint one end, weld the swallow-tail form component as described first component; On the lateral wall of the common borehole wall of the described compressible borehole wall joint other end, weld the V-arrangement as described second component or del component, and the sidepiece of the dovetail part of described swallow-tail form component and the sidepiece of described V-arrangement or del component are fitted.
8. the manufacture method of the sinking by boring borehole wall according to claim 7, is characterized in that, on the lateral wall of the described common borehole wall in described compressible borehole wall joint one end, the swallow-tail form component welded as described first component comprises:
On the lateral wall of the common borehole wall of described compressible borehole wall joint one end, weld at least two swallow-tail form components as described first component evenly and at intervals side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210253143.4A CN102913247B (en) | 2012-07-23 | 2012-07-23 | Sinking well wall using drilling method and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210253143.4A CN102913247B (en) | 2012-07-23 | 2012-07-23 | Sinking well wall using drilling method and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102913247A CN102913247A (en) | 2013-02-06 |
| CN102913247B true CN102913247B (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210253143.4A Expired - Fee Related CN102913247B (en) | 2012-07-23 | 2012-07-23 | Sinking well wall using drilling method and manufacturing method thereof |
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| CN (1) | CN102913247B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109695452B (en) * | 2019-01-07 | 2021-04-27 | 中国矿业大学 | Single-layer shaft capable of axially yielding and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE535564A (en) * | ||||
| PL274873A1 (en) * | 1988-09-22 | 1990-04-02 | Zaklad Badawczo Rozwojowy Prze | Lining for the chamber of shaft bottom inlets |
| CN1916361A (en) * | 2006-08-23 | 2007-02-21 | 淮南矿业(集团)有限责任公司 | Yielding adaptor of well wall in frozen well, and construction method |
| CN200958394Y (en) * | 2006-09-30 | 2007-10-10 | 中国矿业大学 | Curved arc-plate shrinked wellwall water sealer |
| CN201059193Y (en) * | 2007-07-10 | 2008-05-14 | 中国矿业大学 | T-shaped ribbed slab device for multi-rib arc slab type contractible borehole wall |
-
2012
- 2012-07-23 CN CN201210253143.4A patent/CN102913247B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE535564A (en) * | ||||
| PL274873A1 (en) * | 1988-09-22 | 1990-04-02 | Zaklad Badawczo Rozwojowy Prze | Lining for the chamber of shaft bottom inlets |
| CN1916361A (en) * | 2006-08-23 | 2007-02-21 | 淮南矿业(集团)有限责任公司 | Yielding adaptor of well wall in frozen well, and construction method |
| CN200958394Y (en) * | 2006-09-30 | 2007-10-10 | 中国矿业大学 | Curved arc-plate shrinked wellwall water sealer |
| CN201059193Y (en) * | 2007-07-10 | 2008-05-14 | 中国矿业大学 | T-shaped ribbed slab device for multi-rib arc slab type contractible borehole wall |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102913247A (en) | 2013-02-06 |
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