CN103075158B - Steel plate and steel reinforced concrete well wall - Google Patents

Steel plate and steel reinforced concrete well wall Download PDF

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Publication number
CN103075158B
CN103075158B CN201310046617.2A CN201310046617A CN103075158B CN 103075158 B CN103075158 B CN 103075158B CN 201310046617 A CN201310046617 A CN 201310046617A CN 103075158 B CN103075158 B CN 103075158B
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China
Prior art keywords
steel
reinforcing bar
steel plate
plate cylinder
borehole
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CN201310046617.2A
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Chinese (zh)
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CN103075158A (en
Inventor
王衍森
杨维好
杨然
黄家会
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中国矿业大学
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Priority to CN201310046617.2A priority Critical patent/CN103075158B/en
Publication of CN103075158A publication Critical patent/CN103075158A/en
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Publication of CN103075158B publication Critical patent/CN103075158B/en

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Abstract

The invention discloses a steel plate and steel reinforced concrete well wall, which is mostly suitable for deep vertical shafts for bearing high ground pressure and high water pressure. A steel plate cylinder, an annular steel rib, inside vertical steel ribs, outside vertical steel ribs and radial connecting pieces are arranged and concrete is poured to form a cylindrical well wall. The steel plate cylinder and the annular steel rib are respectively positioned on the inner surface of the well wall and in the well wall, and are respectively fixed to the inside and outside vertical steel ribs; the steel plate cylinder and the annular steel rib are connected through the radial connecting pieces to form a spatial structure; and concrete is poured into an annular space formed by the steel plate cylinder and a well wall template or surrounding rock to coat the annular steel rib, the inside and outside vertical steel ribs and the like, and the cylindrical well wall structure is formed. The steel ratio on the inner side of the well wall is high, the concrete between the steel plate cylinder and the annular steel rib is positioned in a three-directional stress state, the compressive strength can be obviously improved, a core bearing area is formed, and the ultimate bearing capacity of the well wall is greatly improved. The steel plate and steel reinforced concrete well wall is used for building deep vertical shafts, the thickness of the well wall can be greatly reduced and the cost is reduced; and the steel plate and steel reinforced concrete well wall is reasonable in structure and easy and convenient to construct and has wide applicability.

Description

The steel plate steel reinforced concrete borehole wall
One, technical field
The invention relates to the steel plate steel reinforced concrete borehole wall, is particularly useful for the deep shaft in deep thick alluvium and the Fu Shui rock stratum of mine construction, as normal sinking, freezing process, boring method and drop shaft sinking pit shaft.
Two, background technology
Along with the exploitation of China's deep mineral resources, pit shaft is built the degree of depth and is constantly increased, and shaft lining load-bearing power has to significantly increase, to bear increasing deep rock thrust.For this reason, only have two kinds by way of: the one, shaft wall structure is constant, improves its strength of materials and thickness; The 2nd, change shaft wall structure.At present, conventional steel concrete wall construction has been difficult to adapt to the needs that Deep Mine is built, and external usual cast iron or the cast steel borehole wall, mound guest's piece borehole wall, the concrete arc plate borehole wall need be prefabricated on ground, and install in down-hole, its construction technology complexity, difficulty is large, cost is high, difficult quality guarantee.
Existing technology, for example, by annular closed skeleton is set in borehole wall inside, improves the total bearing capacity of the borehole wall.But the metallic framework of this borehole wall, can not make borehole wall inner surface concrete become triaxial stress state from plane stress, can not give full play to concrete three axle compressive strength inside the borehole wall.
Existing technology, for example, build the formation inner side individual layer steel plate concrete borehole wall by steel plate is set at borehole wall inner surface.Because inner side steel plate is only by anchor clamp and the concrete binding at the back side, in stand under load process, easily peel off with concrete, inside causing, concrete can not be given full play to three axle compressive strength, and horizontal bearing capacity increase rate is limited.
Existing technology, for example, by double-layer plate is set on the inside and outside surface of the borehole wall, radially connector is built formation concrete walling.But the stressed least favorable position of the borehole wall is its medial region, this type borehole wall utilizes double-layer plate to implement overall radial constraint to the borehole wall, and on the one hand, steel plate consumption is very large, but limited to the raising of steel ratio inside the borehole wall; On the other hand, outside concrete intensity improves the contribution of borehole wall horizontal bearing capacity not remarkable.In addition, in freeze-wellboring, in the irregular annular space between outer surface plate and country rock body, concrete pouring quality is difficult to guarantee, and therefore this type borehole wall is more suitable for drilling shaft lining and caisson wall.
Three, summary of the invention
(1) goal of the invention
In view of the problem that prior art exists, the object of the invention is to propose a kind of more reasonable structure, bearing capacity is higher, difficulty of construction is less and has the steel plate steel reinforced concrete shaft wall structure of broad applicability.
(2) technical scheme
The steel plate steel reinforced concrete borehole wall of the invention, it mainly by: steel plate cylinder, hoop reinforcing bar, medial shaft to reinforcing bar, the vertical reinforcing bar in outside, connector radially, and build the concrete between steel plate cylinder and borehole wall template or steel plate cylinder and country rock body.
The plate with curved surface that steel plate cylinder is shaped by multistage pre-bending forms, and each plate with curved surface is first installed and is fixed to medial shaft on reinforcing bar, then is welded into successively closed tubular structure;
Hoop reinforcing bar is made up of multiple shaped steel segmental arcs, and each shaped steel segmental arc is first installed and is fixed on the vertical reinforcing bar in outside, then becomes closing structure by welding or Bolt Connection; Hoop reinforcing bar arranges by certain vertical spacing layering according to requirement of engineering; Between steel plate cylinder, hoop reinforcing bar, radially connector is set.
Specifically:
A kind of steel plate steel reinforced concrete borehole wall, comprises that steel plate cylinder 1, hoop reinforcing bar 2, medial shaft are to reinforcing bar 3, the vertical reinforcing bar 4 in outside, radially connector 5 and concrete 6;
Steel plate cylinder 1 is arranged on borehole wall inner surface; Steel plate cylinder 1 is circumferential along pit shaft, by the plate with curved surface of multiple segmental arcs by the closed cylindrical structure being welded; Longitudinal along pit shaft, between adjacent steel plate cylinder, be directly or indirectly welding;
Hoop reinforcing bar 2 is arranged on borehole wall inside, and distance between steel plate cylinder 1 is adjustable; Hoop reinforcing bar 2 is circumferential along pit shaft, the annular closing structure that it is formed by connecting by welding or bolt by multiple shaped steel segmental arcs; Each shaped steel segmental arc is longitudinal along pit shaft, layered arrangement successively, and interlamellar spacing is adjustable;
Lay in the outside that medial shaft is adjacent to steel plate cylinder 1 to reinforcing bar 3; Medial shaft is the vertical structures that are formed by connecting by welding or bolt by shaped steel section to reinforcing bar 3; Medial shaft is bolted or welds between reinforcing bar 3 and steel plate cylinder 1;
The vertical reinforcing bar 4 in outside is in close proximity to inner side or the outside of hoop reinforcing bar 2; The vertical reinforcing bar 4 in outside is the vertical structures that are formed by connecting by welding or bolt by shaped steel section; Between the vertical reinforcing bar 4 in outside and hoop reinforcing bar 2, be bolted or weld;
Steel plate cylinder 1 and hoop reinforcing bar 2 radially connect by connector 5 radially;
By between steel plate cylinder 1 and borehole wall template, or in annular space between steel plate cylinder 1 and country rock body, concreting 6 forms the shaft wall structure of tubular.
Drilling shaft lining is intersegmental while there is flanged plate, and (that is: when drilling shaft lining segmentation prefabricating, the steel plate cylinder of every section of borehole wall welds with two ends flanged plate in welding indirectly between adjacent steel plate cylinder; When the borehole wall is installed, between adjacent borehole wall section, directly between the flanged plate of contact, be welded to connect again).
Concrete 6 is ordinary concrete, high performance concrete or fibrous concrete.
The shaped steel segmental arc of hoop reinforcing bar 2 is channel-section steel or H shaped steel or similar shaped steel; Medial shaft is H shaped steel or channel-section steel or similar shaped steel to the shaped steel section of reinforcing bar 3; The shaped steel section of the vertical reinforcing bar 4 in outside is H shaped steel or channel-section steel or similar shaped steel; Radially connector 5 is threaded rod and nut or similar components of both-end band silk.
(3) technique effect
Shaft wall is subject to horizontal soil pressure effect, and least favorable force part is medial region.Therefore, the key of sidewall safety carrying is to improve the strength of materials and the reinforcement ratio (steel content) at above-mentioned position.
The invention, by steel plate cylinder is set in borehole wall surface, in borehole wall inside, apart from surperficial a distance, hoop reinforcing bar is set, and by the composition of connector radially space structures, make to build in concrete wherein and can be subject to stronger radial constraint effect, thereby give full play to concrete three axle compressive strength, form core supporting region, and then improve the ultimate bearing capacity of the borehole wall.Compared with existing well wall construction, inside this type borehole wall, steel ratio is high, there is higher strength and stiffness, can effectively reduce thickness of shaft wall, reduce engineering cost, it is rational in infrastructure, constructs comparatively easy, there is applicability widely, be particularly useful for carrying the deep shaft of highland pressure, high hydraulic pressure.
Four, brief description of the drawings
Fig. 1-1 and Fig. 1-2 are embodiment mono-structural representation (the boring method borehole wall, segmentation prefabricatings; H shaped steel reinforcing bar), wherein, Fig. 1-1st, the axial cross section schematic diagram of embodiment mono-, Fig. 1-2 is the radial section schematic diagram of embodiment mono-.
Fig. 2-1 and Fig. 2-2nd, embodiment bis-structural representations (the boring method borehole wall, segmentation prefabricating; Channel-section steel reinforcing bar), wherein, Fig. 2-1st, the axial cross section schematic diagram of embodiment bis-, Fig. 2-2nd, the radial section schematic diagram of embodiment bis-.
Fig. 3-1 and Fig. 3-2nd, embodiment tri-structural representations (the drop shaft sinking borehole wall, freezing process inner layer well wall, from bottom to top continuous placing; H shaped steel reinforcing bar), wherein, Fig. 3-1st, the axial cross section schematic diagram of embodiment tri-, Fig. 3-2nd, the radial section schematic diagram of embodiment tri-.
Fig. 4-1 and Fig. 4-2nd, embodiment tetra-structural representations (the drop shaft sinking borehole wall, freezing process inner layer well wall, from bottom to top continuous placing; Channel-section steel reinforcing bar), wherein, Fig. 4-1st, the axial cross section schematic diagram of embodiment tetra-, Fig. 4-2nd, the radial section schematic diagram of embodiment tetra-.
Fig. 5-1 and Fig. 5-2nd, and embodiment five structural representations (the normal sinking borehole wall, freezing process outer shaft wall, segmentation is from top to bottom built; H shaped steel reinforcing bar), wherein, Fig. 5-1st, the axial cross section schematic diagram of embodiment five, Fig. 5-2nd, the radial section schematic diagram of embodiment five.
Fig. 6-1 and Fig. 6-2nd, and embodiment six structural representations (the normal sinking borehole wall, freezing process outer shaft wall, segmentation is from top to bottom built; Channel-section steel reinforcing bar), wherein, Fig. 6-1st, the axial cross section schematic diagram of embodiment six, Fig. 6-2nd, the radial section schematic diagram of embodiment six.
In above-mentioned Fig. 1-1~Fig. 2-2, A is upper surface flanged plate, and B is lower surface flanged plate.
In above-mentioned Fig. 5-1~Fig. 6-2, C is that concrete is built hole steel plate, and D is that borehole wall section connects stubble.
Five, detailed description of the invention
A kind of steel plate steel reinforced concrete borehole wall, is mainly formed to reinforcing bar 3, the vertical reinforcing bar 4 in outside, radially connector 5 and concrete 6 monobloc casts by steel plate cylinder 1, hoop reinforcing bar 2, medial shaft.
Steel plate cylinder 1 is arranged on borehole wall inner surface; Circumferential along pit shaft, by the plate with curved surface of multiple segmental arcs by being welded to form closed cylindrical structure; Longitudinal along pit shaft, between adjacent steel plate cylinder, directly or indirectly while having flanged plate (drilling shaft lining is intersegmental) passes through weld connection.
Hoop reinforcing bar 2 is arranged on borehole wall inside, and distance between steel plate cylinder 1 can be adjusted as required; Circumferential along pit shaft, form annular closing structure by multiple shaped steel segmental arcs by welding or Bolt Connection; Longitudinal along pit shaft, layered arrangement (interlamellar spacing can be adjusted as required) at a certain distance; Shaped steel segmental arc is including but not limited to channel-section steel or H shaped steel.
Lay in the outside that medial shaft is close to steel plate cylinder 1 to reinforcing bar 3; It is the vertical structure being formed by welding or Bolt Connection by shaped steel section; Shaped steel section is including but not limited to H shaped steel, channel-section steel; Medial shaft is to passing through bolt or weld connection between reinforcing bar 3 and steel plate cylinder 1.
The vertical reinforcing bar 4 in outside is laid in inner side or the outside of hoop reinforcing bar 2; It is the vertical structure being formed by welding or Bolt Connection by shaped steel section; Shaped steel section is including but not limited to H shaped steel, channel-section steel; Between the vertical reinforcing bar 4 in outside and hoop reinforcing bar 2, pass through bolt or weld connection.
Steel plate cylinder 1 and hoop reinforcing bar 2 are realized radially and being connected by connector 5 radially; Radially connector 5 is including but not limited to the accessory such as threaded rod and nut of both-end band silk.
Form the shaft wall structure of tubular by concreting 6 in the annular space between steel plate cylinder 1, borehole wall template (boring method or drop shaft sinking construction) or country rock body (normal sinking, construction freezing method); Concrete 6 can adopt ordinary concrete, high performance concrete or fibrous concrete.
Below in conjunction with the accompanying drawing of each embodiment, the embodiment of the invention is described in detail:
Embodiment mono-: the boring method borehole wall (segmentation prefabricating, there is annular flange plate at borehole wall two ends)
The steel plate steel reinforced concrete borehole wall of the invention, mainly by steel plate cylinder 1, hoop reinforcing bar 2 (H shaped steel), medial shaft to reinforcing bar 3 (H shaped steel), the vertical reinforcing bar 4 in outside (H shaped steel), radially connector 5, concrete 6 form (seeing Fig. 1-1 and Fig. 1-2).
Implementation method:
(1), on the flanged plate of borehole wall lower end, lay the vertical reinforcing bar 4 in outside, medial shaft along different circles footpath to reinforcing bar 3 (circle spacing, circumferentially spacing can be adjusted as required) and be welded on flanged plate;
(2) shaped steel segmental arc is installed and is fixed on the vertical reinforcing bar 4 in outside, form closed hoop reinforcing bar 2 by welding or Bolt Connection; The plate with curved surface again pre-bending being shaped is installed and is fixed to medial shaft on reinforcing bar 3, by being welded to form closed steel plate cylinder 1;
(3) utilize radially connector 5, connection steel plate cylinder 1, hoop reinforcing bar 2 form space structures;
(4) flanged plate of upper end is installed, and and medial shaft to firm welding between reinforcing bar, the vertical reinforcing bar in outside, steel plate cylinder;
(5) the prefabricated required exterior sheathing of the borehole wall and braced structures (note: steel plate cylinder is as inner formword) are installed;
(6), in the annular space between inner side steel plate cylinder, exterior sheathing, two ends flanged plate, concreting, is prefabricated into the steel plate steel reinforced concrete borehole wall section that is applicable to sinking by boring.
Embodiment bis-: the boring method borehole wall (segmentation prefabricating, there is annular flange plate at borehole wall two ends)
The steel plate steel reinforced concrete borehole wall of the invention, mainly by steel plate cylinder 1, hoop reinforcing bar 2 (channel-section steel), medial shaft to reinforcing bar 3 (channel-section steel), the vertical reinforcing bar 4 in outside (channel-section steel), radially connector 5, concrete 6 form (seeing Fig. 2-1 and Fig. 2-2).
Implementation method: identical with embodiment mono-.
Embodiment tri-: the drop shaft sinking borehole wall, freezing process inner layer well wall (continuous placing from bottom to top)
The steel plate steel reinforced concrete borehole wall of the invention, mainly by steel plate cylinder 1, hoop reinforcing bar 2 (H shaped steel), medial shaft to reinforcing bar 3 (H shaped steel), the vertical reinforcing bar 4 in outside (H shaped steel), radially connector 5, concrete 6 form (seeing Fig. 3-1 and Fig. 3-2).
Implementation method:
(1), first along difference circle footpaths, the vertical reinforcing bar 4 in outside, medial shaft are set to reinforcing bar 3 (circle spacing, the circumferential spacing of vertical reinforcing bar can be adjusted as required); And connect firmly to reinforcing bar with the vertical reinforcing bar in outside, the medial shaft of the bottom borehole wall respectively;
(2) shaped steel segmental arc is installed and is fixed on the vertical reinforcing bar 4 in outside, and welding or become closed hoop reinforcing bar 2 by Bolt Connection;
(3) plate with curved surface pre-bending being shaped is installed and is fixed to medial shaft on reinforcing bar 3, is welded into closed steel plate cylinder 1; And connect with the steel plate cylinder butt welding of the bottom borehole wall.
(4) utilize radially connector 5, connection steel plate cylinder 1, hoop reinforcing bar 2 form space structures;
(5), for drop shaft sinking sinking shaft, the borehole wall is installed and is built required outboard template (note: steel plate cylinder is as inner formword);
(6) concreting in the annular space between steel plate cylinder 1, borehole wall exterior sheathing (drop shaft sinking sinking shaft) or country rock body (freeze-wellboring inner layer well wall), forms the steel plate steel reinforced concrete borehole wall.
Embodiment tetra-: the drop shaft sinking borehole wall, freezing process inner layer well wall (continuous placing from bottom to top)
The steel plate steel reinforced concrete borehole wall of the invention, mainly by steel plate cylinder 1, hoop reinforcing bar 2 (channel-section steel), medial shaft to reinforcing bar 3 (channel-section steel), the vertical reinforcing bar 4 in outside (channel-section steel), radially connector 5, concrete 6 form (seeing Fig. 4-1 and Fig. 4-2).
Implementation method: identical with embodiment tri-.
Embodiment five: the normal sinking borehole wall, freezing process outer shaft wall (segmentation is from top to bottom built)
The steel plate steel reinforced concrete borehole wall of the invention, mainly by steel plate cylinder 1, hoop reinforcing bar 2 (H shaped steel), medial shaft to reinforcing bar 3 (H shaped steel), the vertical reinforcing bar 4 in outside (H shaped steel), radially connector 5, concrete 6 form (seeing Fig. 5-1 and Fig. 5-2).
Implementation method:
(1), first along difference circle footpaths, the vertical reinforcing bar 4 in outside, medial shaft are set to reinforcing bar 3 (circle spacing, the circumferential spacing of vertical reinforcing bar can be adjusted as required); And connect firmly to reinforcing bar with the vertical reinforcing bar in outside, the medial shaft of a upper borehole wall section respectively;
(2) shaped steel segmental arc is installed and is fixed on the vertical reinforcing bar 4 in outside, and welding or become closed hoop reinforcing bar 2 by Bolt Connection;
(3) plate with curved surface pre-bending being shaped is installed and is fixed to medial shaft on reinforcing bar 3, is welded into closed steel plate cylinder 1; And connect with the steel plate cylinder butt welding of a upper borehole wall section, but need be at steel plate cylinder upper limb (connecing a batch position) along circumferentially staying the hole of establishing some, so that concreting, vibrate.
(4) utilize radially connector 5, connection steel plate cylinder 1, hoop reinforcing bar 2 form space structures;
(5) borehole wall section is installed and builds required bottom blade foot model (note: steel plate cylinder is as inner formword);
(6), in the annular space between steel plate cylinder 1, bottom blade foot model, outside country rock body, concreting, forms the steel plate steel reinforced concrete borehole wall.
(7) after borehole wall hardening of concrete, by welding steel, the hole of shutoff steel plate cylinder 1 upper limb.
Embodiment six: the normal sinking borehole wall, freezing process outer shaft wall (segmentation is from top to bottom built)
The steel plate steel reinforced concrete borehole wall of the invention, mainly by steel plate cylinder 1, hoop reinforcing bar 2 (H shaped steel), medial shaft to reinforcing bar 3 (H shaped steel), the vertical reinforcing bar 4 in outside (H shaped steel), radially connector 5, concrete 6 form (seeing Fig. 6-1 and Fig. 6-2).
Implementation method: identical with embodiment five.
Inside this type borehole wall, steel ratio is high, and the concrete between steel plate cylinder and hoop reinforcing bar, in three-dimensional stress state, can significantly improve compressive strength, forms core supporting region, significantly improves borehole wall ultimate bearing capacity.For dark vertical construction, can significantly reduce thickness of shaft wall, reduce costs; It is rational in infrastructure, and easy construction has applicability widely.Be particularly useful for carrying the deep shaft of highland pressure, high hydraulic pressure.

Claims (4)

1. a steel plate steel reinforced concrete borehole wall, is characterized in that: comprise that steel plate cylinder (1), hoop reinforcing bar (2), medial shaft are to reinforcing bar (3), the vertical reinforcing bar in outside (4), radially connector (5) and concrete (6);
Steel plate cylinder (1) is arranged on borehole wall inner surface; Steel plate cylinder (1) is circumferential along pit shaft, by the plate with curved surface of multiple segmental arcs by the closed cylindrical structure being welded; Longitudinal along pit shaft, between adjacent steel plate cylinder, be directly or indirectly welding;
Hoop reinforcing bar (2) is arranged on borehole wall inside, and distance between steel plate cylinder (1) is adjustable; Hoop reinforcing bar (2) is circumferential along pit shaft, the annular closing structure that it is formed by connecting by welding or bolt by multiple shaped steel segmental arcs; Each shaped steel segmental arc is longitudinal along pit shaft, layered arrangement successively, and interlamellar spacing is adjustable;
Lay in the outside that medial shaft is adjacent to steel plate cylinder (1) to reinforcing bar (3); Medial shaft is the vertical structure being formed by connecting by welding or bolt by shaped steel section to reinforcing bar (3); Medial shaft is bolted or welds between reinforcing bar (3) and steel plate cylinder (1);
The vertical reinforcing bar (4) in outside is in close proximity to inner side or the outside of hoop reinforcing bar (2); The vertical reinforcing bar (4) in outside is the vertical structure being formed by connecting by welding or bolt by shaped steel section; Between the vertical reinforcing bar (4) in outside and hoop reinforcing bar (2), be bolted or weld;
Steel plate cylinder (1) and hoop reinforcing bar (2) radially connect by connector (5) radially;
By between steel plate cylinder (1) and borehole wall template, or in annular space between steel plate cylinder (1) and country rock body, concreting (6) forms the shaft wall structure of tubular.
2. the steel plate steel reinforced concrete borehole wall according to claim 1, is characterized in that: drilling shaft lining is intersegmental while there is flanged plate, welding indirectly between adjacent steel plate cylinder.
3. the steel plate steel reinforced concrete borehole wall according to claim 1, is characterized in that: concrete (6) is ordinary concrete, high performance concrete or fibrous concrete.
4. the steel plate steel reinforced concrete borehole wall according to claim 1, is characterized in that: the shaped steel segmental arc of hoop reinforcing bar (2) is channel-section steel or H shaped steel; Medial shaft is H shaped steel or channel-section steel to the shaped steel section of reinforcing bar (3); The shaped steel section of the vertical reinforcing bar (4) in outside is H shaped steel or channel-section steel; Radially connector (5) is threaded rod and the nut of both-end band silk.
CN201310046617.2A 2013-02-04 2013-02-04 Steel plate and steel reinforced concrete well wall CN103075158B (en)

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CN103982188B (en) * 2014-06-03 2017-01-04 中铁第一勘察设计院集团有限公司 The supporting structure system of rocky stratum big cross section deep shaft and construction method thereof
CN104747192B (en) * 2015-01-27 2017-06-06 中国矿业大学 Supporting construction is fed back in a kind of concrete filled steel tube stress deformation suitable for shaft of vertical well
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CN106121658B (en) * 2016-08-05 2020-03-27 煤炭工业合肥设计研究院 Freezing method sinking shaft well wall supporting structure and construction method thereof
CN106522959B (en) * 2016-12-12 2017-10-17 中国矿业大学 A kind of borehole wall steel construction waterproof connecting plate and its construction technology
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