CN109751053B - Double-layer well wall with radial connecting members and construction process - Google Patents
Double-layer well wall with radial connecting members and construction process Download PDFInfo
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- CN109751053B CN109751053B CN201811569702.6A CN201811569702A CN109751053B CN 109751053 B CN109751053 B CN 109751053B CN 201811569702 A CN201811569702 A CN 201811569702A CN 109751053 B CN109751053 B CN 109751053B
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Abstract
The invention discloses a double-layer well wall with a radial connecting component, and relates to the technical field of mine construction engineering. The double-layer well wall comprises an outer layer well wall, an inner layer well wall, an interlayer and a connecting member, wherein the connecting member comprises an outer layer section and an inner layer section which are overlapped; one end of the inner layer section of the connecting member, which is far away from the outer well wall, is sleeved with a prestressed tray, and the prestressed tray is welded with the inner layer section of the connecting member. According to the double-layer well wall disclosed by the invention, the connecting members are radially arranged between the double-layer well walls, so that the radial connection between the inner well wall and the outer well wall is realized, and the integrity of the well wall is improved; in addition, the prestress tray is sleeved at one end, far away from the outer well wall, of the inner layer section of the connecting component, the prestress effect between the inner well wall and the outer well wall is realized, the bearing connection and the load transmission of the inner well wall and the outer well wall are increased, the design thickness of the inner well wall is reduced on the basis that the shaft can bear the higher water pressure of the deep part, and the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of mine construction engineering, in particular to a double-layer well wall with a radial connecting component and a construction process.
Background
The artificial freezing stratum method is the main method for digging a shaft in a water-rich or weak stratum, and the shaft wall is a supporting structure for blocking the pressure of stratum water and soil. At present, in the manual freezing sinking technology, the well wall is generally of a double-layer structure and is divided into an outer layer well wall and an inner layer well wall. The outer well wall has the function of providing a safe operation space for shaft tunneling, and due to the technical characteristics of the manual freezing shaft sinking technology, the outer well wall is not continuous up and down, connecting stubbles exist between successive construction sections, and after a frozen wall is melted, the outer well wall cannot play a good waterproof role, so that the inner well wall needs to be built, and underground water is permanently prevented from flowing into the shaft.
In the existing double-layer well wall, an inner layer well wall and an outer layer well wall are separated, the outer layer well wall is a temporary supporting structure, a shaft is regarded as a complete function after tunneling, and the inner layer well wall is a permanent supporting structure and needs to permanently bear underground water pressure. Along with the increase of mining degree of depth, the water pressure that the inlayer wall of a well bore increases gradually, and prior art mainly improves its bearing capacity through thickening the inlayer wall of a well, and this kind of way has not only increased construction cost, has also wasted the bearing capacity of the outer wall of a well.
Therefore, in view of the above problems, there is a need for a double-layer well wall with radial connecting members, which improves the integrity of the inner and outer well walls, fully utilizes the outer well wall, and improves the radial bearing capacity of the inner well wall, so as to reduce the thickness of the inner well wall while bearing the higher water pressure of the deep mine.
Disclosure of Invention
In view of the above, the invention provides a double-layer well wall with a radial connecting component, and the connecting component for radially connecting the inner well wall and the outer well wall is arranged, so that the radial connection between the inner well wall and the outer well wall is realized, and the integrity of the well wall is improved. In addition, the prestressing force tray is established to the pot head that keeps away from the outer wall of a well in connecting element inner layer section, realizes the prestressing force effect between the inner wall of a well and the outer wall of a well, has increaseed the bearing connection and the load transmission of inner wall of a well and the outer wall of a well, effectively utilizes the outer wall of a well, improves the radial bearing capacity of the inner wall of a well, on guaranteeing that the wall of a well can bear the higher hydraulic basis in deep, has reduced the design thickness of the inner wall of a well to reduce engineering cost.
The double-layer well wall with the radial connecting component comprises an outer well wall, an inner well wall, an interlayer between the outer well wall and the inner well wall, and the connecting component for radially connecting the outer well wall and the inner well wall, wherein the connecting component comprises a connecting component outer layer section embedded in the outer well wall and a connecting component inner layer section poured in the inner well wall, and the connecting component outer layer section and the connecting component inner layer section are overlapped.
Preferably, one end, far away from the outer well wall, of the inner layer section of the connecting member is sleeved with a prestress tray, the prestress tray is welded with the inner layer section of the connecting member under the action of prestress tension, and the prestress tray is clamped on the reinforcement cage of the inner well wall in an anchoring mode.
Preferably, the connecting member further comprises a joint box arranged at the lap joint of the outer layer section of the connecting member and the inner layer section of the connecting member, the joint box is fixed at a reserved position on the reinforcement cage on the side, close to the inner layer well wall, of the outer layer well wall, and the opening of the joint box faces the inner layer well wall; one end of the outer layer section of the connecting member, which is close to the artificially frozen stratum, is bound on the reinforcement cage, the other end of the outer layer section of the connecting member is fixed in the joint box through a through hole, and the through hole is subjected to plugging treatment.
Preferably, the outer layer section and the inner layer section of the connecting member are both hot-rolled ribbed steel bars or finish-rolled twisted steel bars.
Preferably, the overlapping mode of the outer layer section and the inner layer section of the connecting member is welding, sleeve connection or bolt connection.
Preferably, a through hole is formed in the position, corresponding to the connecting component, of the interlayer between the outer well wall and the inner well wall, and the interlayer is made of a plastic plate or a cow felt.
A construction process of a double-layer well wall with radial connecting components comprises the following steps:
the method comprises the following steps: adopting an artificial stratum freezing method to tunnel frozen mineshafts in sections;
step two: binding an outer-layer well wall reinforcement cage in a segmented manner, welding and binding a joint box at a reserved position on the reinforcement cage at the middle position of each segment, wherein the opening of the joint box faces the inner-layer well wall; meanwhile, embedding an outer layer section of the connecting member in the radial direction of the shaft, binding one end, close to the artificially frozen stratum, of the outer layer section of the connecting member on a reinforcement cage, and punching, welding and fixing one end, close to the inner well wall, of the connecting member in a joint box;
step three: plugging the position of a through hole of the outer layer section of the connecting member on the joint box, covering a cover plate at the opening of the joint box, and sealing the opening of the joint box;
step four: a layer of rubber and plastic heat-preservation cotton with the compressed thickness equal to that of the well wall protection layer is paved outside the cover plate, and the rubber and plastic heat-preservation cotton is wound and bound by a plastic adhesive tape;
step five: pouring the outer well wall, and removing the mold after the concrete of each section of the outer well wall is initially set;
step six: after the mould is removed, exposing the rubber and plastic heat-preservation cotton on the side surface of the outer well wall close to the inner well wall, cutting the rubber and plastic heat-preservation cotton, removing the joint box cover plate, and exposing the lapping stubble on the outer layer section of the connecting member;
step seven: laying an interlayer between the inner well wall and the outer well wall, and digging a through hole at the position, corresponding to the connecting member, on the interlayer;
step eight: binding an inner-layer well wall reinforcement cage, binding inner-layer sections of connecting members along the radial direction of a shaft when binding to each lap joint layer, lapping one end of each inner-layer section of the connecting members on a lap joint stub, enabling the other end of each inner-layer well wall reinforcement cage to penetrate through the inner-layer well wall reinforcement cage, sleeving a prestress tray at the end part of each inner-layer section of each pre-pull connecting member, sleeving an end head at one end of each prestress tray on each inner-layer section of each pre-pull connecting member, applying prestress to each connecting member, then welding and fixing the prestress trays and the inner-layer sections of the connecting members in a state of keeping the pull force, releasing the pull force after welding is finished, and clamping the anchor;
step nine: and continuously binding and pouring the inner well wall from bottom to top.
Compared with the prior art, the double-layer well wall with the radial connecting component has the advantages that:
the double-deck wall of a well, through the connecting elements who sets up radial connection inlayer wall of a well and the outer wall of a well, realize the radial connection between inlayer wall of a well and the outer wall of a well, improve the wholeness of the wall of a well, realize the prestressing effect between inlayer wall of a well and the outer wall of a well simultaneously, the bearing connection and the load transmission of the inlayer wall of a well and the outer wall of a well have been increaseed, effectively utilize the outer wall of a well, improve the radial bearing capacity of the inlayer wall of a well, on guaranteeing that the wall of a well can bear the higher hydraulic basis in deep, the design thickness of the.
Drawings
For a clearer explanation of the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described 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 a person skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a double-layer well wall with radial connecting members according to the present invention.
FIG. 2 is a horizontal sectional view of the double-layer well wall.
Fig. 3 is a schematic view of an outer layer section of a connecting member.
The part names represented by the numbers or letters in the drawings are:
1-artificially freezing the stratum; 2-outer well wall; 3-inner well wall; 4-interlayer; 5-connecting the outer layer section of the component; 6-joint box; 7-rubber and plastic heat preservation cotton; 8-connecting the component inner layer section; 9-prestressed trays.
Detailed Description
The following provides a brief description of embodiments of the present invention with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any inventive work belong to the protection scope of the present invention.
Fig. 1-3 show preferred embodiments of the invention, respectively, from different perspectives, in detail.
The double-layer well wall with the radial connecting components comprises an outer well wall 2 which is dug and built in sections, an inner well wall 3 which is poured continuously, an interlayer 4 between the outer well wall 2 and the inner well wall 3 and connecting components which are radially connected with the outer well wall 2 and the inner well wall 3, and the arrangement of the connecting components realizes the radial connection between the inner well wall 3 and the outer well wall 2, so that the integrity of the double-layer well wall is improved. Specifically, the connecting member comprises a connecting member outer layer section 5 embedded in the outer well wall 2 and a connecting member inner layer section 8 poured in the inner well wall 3, and the connecting member outer layer section 5 and the connecting member inner layer section 8 are overlapped. The connection member outer layer section 5 and the connection member inner layer section 8 are lapped in an unlimited manner, and welding, muff coupling or bolting are preferable.
Further, 8 one end in the inner layer section of connecting element overlaps with 5 overlap joints in the outer layer section of connecting element, and the one end of keeping away from outer wall of a well 2 passes inner wall of a well 3, overlaps at its tip and is equipped with prestressing force tray 9, and prestressing force tray 9 welds under the prestressing force tensioning effect with the inner layer section of connecting element 8, and after the release drawing force, prestressing force tray 9 anchor card is on 3 steel reinforcement cages of inner wall of a well. The setting of prestressing force tray 9 has realized the prestressing force effect between inlayer wall of a well 3 and the outer wall of a well 2, has increaseed the bearing connection and the load transmission of inlayer wall of a well 3 and the outer wall of a well 2, on guaranteeing that the pit shaft can bear the higher hydraulic basis in deep, has reduced the design thickness of inlayer wall of a well 3 to reduce engineering cost.
Further, the connecting component still includes a joint box 6 that sets up in 8 overlap joints of connecting component outer interval 5 and connecting component inner interval, and joint box 6 is fixed in outer wall of a well 2 and is close to the reservation position department on the steel reinforcement cage of the 3 sides of inner wall of a well, and 6 openings of joint box are towards inner wall of a well 3. One end of the outer layer section 5 of the connecting member, which is close to the artificial frozen stratum 1, is bound on a reinforcement cage, and the other end of the outer layer section is fixed in a joint box 6 in a perforation welding mode. The arrangement of the joint box 6 is convenient for exposing the lapping stubbles after the mould is removed, so that the implementation of the lapping process is more convenient.
Furthermore, the perforated part of the joint box 6 and the outer layer section 5 of the connecting member needs to be sealed to prevent concrete from entering the joint box.
Furthermore, the materials of the outer layer section 5 and the inner layer section 8 of the connecting member are not limited, and hot rolled ribbed steel bars or finish rolled twisted steel bars are preferred.
Furthermore, a through hole is formed in the position, corresponding to the connecting component, of the interlayer 4 between the outer well wall 2 and the inner well wall 3, and the through hole is convenient to expose the lapping connection. And the interlayer 4 between the outer well wall 2 and the inner well wall 3 is made of plastic plates or cow felts.
A construction process of a double-layer well wall with radial connecting components comprises the following steps:
the method comprises the following steps: and (5) excavating the shaft in sections by adopting an artificial stratum freezing method.
Step two: the outer wall of a well 2 steel reinforcement cage of segmentation ligature, position in every section with joint case 6 welding or ligature on the steel reinforcement cage reserve position department, 6 openings of joint case towards the inlayer wall of a well 3, simultaneously, according to the radial pre-buried connecting element outer layer section 5 of pit shaft, the one end ligature that connecting element outer layer section 5 is close to artifical freezing stratum 1 is on the steel reinforcement cage, and the one end perforation welded fastening that is close to inlayer wall of a well 3 is in joint case 6.
Step three: and (3) plugging the perforated positions of the joint box 6 and the outer layer section 5 of the connecting member by using cold-patch glue, covering the cover plate of the joint box 6, wherein the cover plate of the joint box 6 is not higher than the reinforcement cage too much.
Step four: the rubber and plastic heat preservation cotton 7 with the compression thickness equivalent to the thickness of the well wall protection layer is paved outside the cover plate, the rubber and plastic heat preservation cotton 7 is bound by winding of the plastic adhesive tape, and after the steel formwork is well supported, the rubber and plastic heat preservation cotton 7 just tightly supports the steel formwork, so that the rubber and plastic heat preservation cotton 7 just leaks when the outer well wall formwork is detached.
Step five: and pouring the outer well wall 2 to the designed wall seat position in sections, and removing the formwork after the concrete of each section of the outer well wall 2 is initially set.
Step six: after the mould is removed, the rubber and plastic heat-preservation cotton 7 is exposed on the side surface of the outer well wall 2 close to the inner well wall 3, the rubber and plastic heat-preservation cotton 7 is cut open, the cover plate of the joint box 6 is removed, and the lapping stubble on the outer layer section 5 of the connecting member is exposed.
Step seven: an interlayer 4 between the inner well wall 3 and the outer well wall 2 is laid, and a through hole is dug at the position, corresponding to the connecting component, on the interlayer 4.
Step eight: binding an inner-layer well wall 3 steel reinforcement cage, binding a connecting member inner layer 8 along the radial direction of a shaft when binding to each lap joint layer, lapping one end of the connecting member inner layer 8 on a lap joint, enabling the other end to penetrate through the inner-layer well wall 3 steel reinforcement cage, sleeving a prestress tray 9 at the end part, sleeving an end head at one end of the prestress tray 9 on the prestretching connecting member inner layer 8, applying prestress to the connecting member, then welding and fixing the prestress tray 9 and the connecting member inner layer 8 in a state of keeping the pulling force, releasing the pulling force after welding is finished, clamping the prestress tray 9 on the inner-layer well wall 3 steel reinforcement cage, and realizing the prestress effect between the inner-layer well wall 3 and the outer-layer well wall 2. Specifically, the length of the inner layer section 8 of the connecting member, which is far away from one end of the outer well wall 2 and is exposed out of the reinforcement cage of the inner well wall 3, is smaller than the thickness of the protective layer of the inner well wall 3.
Step nine: and continuously pouring the inner well wall 3 from bottom to top to finish the construction of the double-layer well wall.
In summary, the double-layer well wall with the radial connecting component disclosed by the invention realizes the radial connection between the inner well wall and the outer well wall by arranging the connecting component for radially connecting the inner well wall and the outer well wall, and improves the integrity of the well wall. In addition, establish the prestressing force tray through the pot head that keeps away from the outer wall of a well in connecting element inner layer section, realize the prestressing force effect between the inlayer wall of a well and the outer wall of a well, strengthened the bearing connection and the load transmission of inlayer wall of a well and the outer wall of a well, effectively utilize the outer wall of a well, improve the radial bearing capacity of the inlayer wall of a well, on guaranteeing that the wall of a well can bear the higher hydraulic basis in deep, reduced the design thickness of the inlayer wall of a well to reduce engineering cost.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The double-layer well wall with the radial connecting component is characterized by comprising an outer well wall (2), an inner well wall (3), an interlayer (4) between the outer well wall (2) and the inner well wall (3) and the connecting component for radially connecting the outer well wall (2) and the inner well wall (3), wherein the connecting component comprises a connecting component outer layer section (5) embedded in the outer well wall (2) and a connecting component inner layer section (8) poured in the inner well wall (3), and the connecting component outer layer section (5) and the connecting component inner layer section (8) are lapped;
one end, far away from the outer well wall (2), of the inner layer section (8) of the connecting member is sleeved with a prestress tray (9), the prestress tray (9) and the inner layer section (8) of the connecting member are welded under the action of prestress tension, and the prestress tray (9) is clamped on a reinforcement cage of the inner well wall (3) in an anchoring mode.
2. The double-layer well wall with the radial connecting component as claimed in claim 1, wherein the connecting component further comprises a joint box (6) arranged at the lap joint of the outer layer section (5) of the connecting component and the inner layer section (8) of the connecting component, the joint box (6) is fixed at a reserved position on the reinforcement cage of the outer well wall (2) close to the inner well wall (3), and the opening of the joint box (6) faces the inner well wall (3); one end of the outer layer section (5) of the connecting member, which is close to the artificial frozen stratum (1), is bound on the reinforcement cage, the other end of the outer layer section of the connecting member is fixed in the joint box (6) through a perforation, and the perforation is subjected to plugging treatment.
3. The double-layer well wall with the radial connecting members as claimed in claim 1, wherein the outer layer section (5) of the connecting member and the inner layer section (8) of the connecting member are both hot rolled ribbed steel bars or finish rolled twisted steel bars.
4. The double-layer well wall with the radial connecting components as claimed in claim 1, wherein the connecting component outer layer section (5) and the connecting component inner layer section (8) are overlapped in a welding mode or a sleeve connection mode or a bolt connection mode.
5. The double-layer well wall with the radial connecting components as claimed in claim 1, wherein through holes are formed in the interlayer (4) between the outer well wall (2) and the inner well wall (3) corresponding to the connecting components, and the interlayer (4) is made of a plastic plate or a felt made of cow.
6. The process of any one of claims 1 to 5, wherein the method comprises the steps of:
the method comprises the following steps: adopting an artificial stratum freezing method to tunnel frozen mineshafts in sections;
step two: binding the steel reinforcement cage of the outer well wall (2) in a segmented manner, welding and binding a joint box (6) at a reserved position on the steel reinforcement cage at the middle position of each segment, wherein the opening of the joint box (6) faces the inner well wall (3); meanwhile, an outer layer section (5) of the connecting member is embedded in the radial direction of the shaft, one end, close to the artificial frozen stratum (1), of the outer layer section (5) of the connecting member is bound on a reinforcement cage, and one end, close to the inner well wall (3), of the outer layer section of the connecting member is fixed in a joint box (6) in a penetrating and welding mode;
step three: plugging the perforated position of the outer layer section (5) of the connecting member on the joint box (6), covering a cover plate at the opening of the joint box (6), and closing the opening of the joint box (6);
step four: a layer of rubber-plastic heat-insulating cotton (7) with the compressed thickness equal to that of the well wall protective layer is paved outside the cover plate, and the rubber-plastic heat-insulating cotton (7) is wound and bound by a plastic adhesive tape;
step five: pouring the outer well wall (2), and removing the mold after the concrete of each section of the outer well wall (2) is initially set;
step six: after the mould is removed, exposing the rubber and plastic heat-insulation cotton (7) on the side surface of the outer well wall (2) close to the inner well wall (3), cutting the rubber and plastic heat-insulation cotton (7), removing the cover plate of the joint box (6), and exposing the lapping stubble on the outer layer section (5) of the connecting member;
step seven: laying an interlayer (4) between the inner well wall (3) and the outer well wall (2), and digging a through hole at the position, corresponding to the connecting member, on the interlayer (4);
step eight: binding an inner-layer well wall (3) reinforcement cage, binding a connecting member inner layer section (8) along the radial direction of a shaft when binding to each lap joint layer, lapping one end of the connecting member inner layer section (8) on a lap joint stub, penetrating the inner-layer well wall (3) reinforcement cage at the other end, sleeving a prestress tray (9) at the end part, sleeving the end head of one end of the prestress tray (9) on the prestretching connecting member inner layer section (8), applying prestress to the connecting member, then welding and fixing the prestress tray (9) and the connecting member inner layer section (8) in a state of maintaining the pulling force, releasing the pulling force after welding is finished, and clamping an anchor of the prestress tray (9) on the inner-layer well wall (3) reinforcement cage;
step nine: continuously binding and pouring the inner well wall (3) from bottom to top.
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| SU1040157A1 (en) * | 1982-02-09 | 1983-09-07 | Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Горной Геомеханики И Маркшейдерского Дела | Multilayer support of mine working |
| CN2841963Y (en) * | 2005-09-10 | 2006-11-29 | 中国矿业大学 | Well wall reinforcing device |
| CN100526604C (en) * | 2006-06-27 | 2009-08-12 | 中国矿业大学 | Single layer well wall with connecting plate and its constructing method |
| CN101906973A (en) * | 2010-07-23 | 2010-12-08 | 中国矿业大学 | Composite well wall with compressible interlayer and construction method thereof |
| CN102619521B (en) * | 2012-04-19 | 2014-10-29 | 中国矿业大学 | Construction method for vertical shaft bedrock section wall structure |
| CN103075158B (en) * | 2013-02-04 | 2014-10-29 | 中国矿业大学 | Steel plate and steel reinforced concrete well wall |
| CN105201514B (en) * | 2015-09-15 | 2017-08-11 | 中国矿业大学 | A kind of water-bearing stratum shaft wall structure and construction method |
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