CN110671114A - Recovery type circular shaft supporting device and method - Google Patents
Recovery type circular shaft supporting device and method Download PDFInfo
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- CN110671114A CN110671114A CN201911061244.XA CN201911061244A CN110671114A CN 110671114 A CN110671114 A CN 110671114A CN 201911061244 A CN201911061244 A CN 201911061244A CN 110671114 A CN110671114 A CN 110671114A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 99
- 239000010959 steel Substances 0.000 claims abstract description 99
- 239000002689 soil Substances 0.000 claims abstract description 75
- 239000011372 high-strength concrete Substances 0.000 claims abstract description 5
- 238000004064 recycling Methods 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 5
- 238000011900 installation process Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 20
- 238000009412 basement excavation Methods 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D7/00—Shaft equipment, e.g. timbering within the shaft
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
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- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a recovery type circular shaft supporting device and a method, which mainly comprise the following steps: the upper and lower retaining side walls, the annular steel waist beam, the three vertical connecting beams, the limiting block and the upper and lower annular supporting units; wherein each soil retaining side wall consists of a plurality of sections of arc corrugated steel plates; the steel waist beam is annular square steel and is fixed at the joint of the two retaining side walls to realize the inter-annular connection of the retaining side walls; the back of the vertical connecting beam can be connected with the steel waist beam through bolts, so that the vertical fixation of the steel waist beam and the side wall of each ring of soil retaining wall is realized; the limiting blocks are small high-strength concrete prefabricated parts and are positioned in the middle of the vertical connecting beams and the side walls of the soil retaining wall, so that the force transmission effect is realized; the upper annular supporting unit and the lower annular supporting unit are pushed to the vertical connecting beam to apply pre-supporting force to the side wall of the soil retaining wall. This supporting device has realized the high-efficient construction that the shaft excavation was strutted through assembling the structure, and recoverable recycle.
Description
Technical Field
The invention relates to the field of civil engineering equipment, in particular to a recovery type circular shaft supporting device and method.
Background
The vertical shaft is the most common construction auxiliary structure in the construction process of urban underground space engineering, has very wide application, and mainly assists pipe trench laying, line crossing and underground large-volume space subsection excavation construction. In the process of laying a pipe ditch or penetrating an underground long-distance line, a small vertical shaft is required to be arranged at a certain distance, so that the functions of ventilation and transportation of related materials are realized, and the progress of engineering is accelerated. In the process of developing an underground large-volume space, the construction progress can be greatly delayed by one-time excavation and support of the underground space, and the construction risk is increased, so that the construction process of subsection excavation and support is mostly adopted to improve the construction efficiency, a plurality of channels are required to be excavated from the earth surface to an underground target area, and the synchronous excavation construction of multiple parts is realized. Shafts play an important role in the national infrastructure construction process.
In the process of shaft excavation and support, the traditional reinforced concrete structure is usually adopted for construction, and the shaft is usually used as a ventilation channel in the later underground structure operation process so as to achieve the purpose of long-term utilization. Therefore, the number of vertical shafts in the sub-excavation process of the underground structure is limited, the construction efficiency and the planning of later-stage ventilation shafts must be considered comprehensively, and the operation safety of some underground structures can be influenced by the existence of a large number of ventilation shafts. The vertical shaft of the reinforced concrete structure needs a certain time to exert the strength in the construction process, the ground surface settlement caused by the strength exertion is inevitable, a large amount of environmental pollution and material waste exist, and the construction efficiency is limited to a certain extent.
In the prior art, research on a novel vertical shaft device and a supporting technology exists. For example: chinese patent application No. 201721399387.8 provides a shaft collar and a shaft device. The shaft locking ring comprises a reinforced concrete beam and a pile, the supporting layer is inserted into one end of the pile, the other end of the pile is connected with the beam, and the other end of the beam is connected with the shaft body to achieve the purpose of fixing the shaft. The vertical shaft structure provided by the scheme can not be separated from the traditional reinforced concrete process, only certain changes are made in the structural form, and the purpose of recycling can not be achieved. Chinese patent application No. 201721389376.1 provides a prefabricated construction shaft. The method mainly comprises a lowermost prefabricated well wall and a plurality of standard sections of prefabricated well walls, and provides detailed construction steps. The device assembles open caisson structure for precast concrete, and the open caisson structure construction in mainly being applied to soft clay area needs to carry out the factory prefabrication of each part according to the engineering reality, and the range of application is less. The chinese patent application No. 201821938104.7 provides a construction shaft for construction engineering, which comprises a shaft wall, a fixed base, a sealing cover and other components, and the main purpose of the construction shaft is to protect the shaft mouth of the shaft. The structure of the device is too simple, only the protection device of the shaft mouth of the vertical shaft is introduced, and the detailed description of the assembling process is omitted.
Therefore, how to realize the rapid assembling and supporting process of the vertical shaft and achieve the purpose of recycling, which is a problem to be solved urgently.
Disclosure of Invention
Based on the problems in the prior art, the invention aims to provide a recycling type circular shaft supporting device and a recycling type circular shaft supporting method, which can solve the problems that the conventional supporting device cannot realize the quick assembling and supporting process of a shaft, is inconvenient to use, recycle and the like.
The purpose of the invention is realized by the following technical scheme:
the embodiment of the invention provides a recovery type round shaft supporting device, which comprises:
the upper retaining wall side wall, the annular steel waist beam, the lower retaining wall side wall, the upper annular supporting unit, the lower annular supporting unit, the three vertical connecting beams and the plurality of limiting blocks; wherein the content of the first and second substances,
the upper soil retaining side wall is a prefabricated corrugated steel plate assembled ring structure; the structure of the lower retaining side wall is the same as that of the upper retaining side wall;
the upper soil retaining side wall, the annular steel waist beam and the lower soil retaining side wall are sequentially arranged from top to bottom to form an annular structure body;
the three vertical connecting beams are uniformly distributed on the inner wall of a circular structure body formed by the upper soil-retaining side wall, the annular steel waist beam and the lower soil-retaining side wall, the middle part of each vertical connecting beam is fixedly connected with the annular steel waist beam through a bolt, and a limiting block is arranged between each vertical connecting beam and each of the upper soil-retaining side wall and the lower soil-retaining side wall;
each vertical connecting beam is respectively provided with an upper supporting position and a lower supporting position, the position of the upper supporting position corresponds to the upper soil retaining side wall, and the position of the lower supporting position corresponds to the lower soil retaining side wall;
the first annular supporting unit is arranged inside the upper soil retaining side wall, and three supporting ends of the upper annular supporting unit are respectively supported on upper supporting positions of three vertical connecting beams and can apply a pre-supporting force to the upper soil retaining side wall from the inside;
the structure of the lower annular supporting unit is the same as that of the upper annular supporting unit;
the lower annular supporting unit is arranged inside the lower soil retaining side wall, three supporting ends of the lower annular supporting unit are respectively supported on the lower supporting positions of the three vertical connecting beams, and pre-supporting force can be applied to the lower soil retaining side wall annularly from the inside.
The embodiment of the invention also provides a recovered circular shaft supporting method, and a plurality of groups of recovered circular shaft supporting devices provided by the invention are adopted, and the method comprises the following steps:
step 2, continuously excavating the soil body downwards to the depth of the first layer of annular steel waist beam and the second annular soil-retaining side wall, mounting the annular steel waist beam, and assembling the lower soil-retaining side wall;
step 4, installing limiting blocks in gaps between each vertical connecting beam and the upper and lower retaining side walls, hoisting the second and upper annular supporting units to specified positions, and respectively jacking from three directions in the upper and lower retaining side walls;
and 5, circulating the steps until the vertical shaft is excavated to the target depth.
According to the technical scheme provided by the invention, the recovery type circular shaft supporting device and the method provided by the embodiment of the invention have the beneficial effects that:
the supporting device is simple in structure and good in stress form, can meet different practical engineering requirements, and can be used for rapidly processing vertical shaft structures with various sizes; the supporting device can realize the quick assembly of the excavated vertical shaft, and can be quickly disassembled and recycled along with the landfill after the use, thereby realizing the aim of recycling; the support device can immediately exert strength after being assembled, overcomes the time for exerting the strength of a concrete structure, and can reduce disturbance to soil around an excavation surface to a certain extent; the supporting device completely breaks away from the traditional concrete process, and greatly reduces the environmental pollution.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of an overall structure provided in an embodiment of the present invention;
FIG. 2 is a schematic view of a single retaining wall according to an embodiment of the present invention;
FIG. 3 is a schematic view of the combination of a steel wale and a vertical coupling beam according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of the relative positions of the retaining sidewalls, the stop blocks and the vertical connecting beams according to the embodiment of the present invention;
fig. 5 is a schematic diagram of relative positions of the circumferential support units and the vertical connecting beams according to the embodiment of the present invention;
the parts corresponding to each mark in the figure are: 1-upper retaining sidewalls; 2, a limiting block; 3-vertical connecting beams; 4-ring-shaped steel wale; 5-an upper circumferential support unit; 6-lower retaining sidewalls; 7-lower circumferential support unit;
11-arc corrugated steel plate; 12-a joint flange;
21-supporting the steel pipe; 22-an elastic steel ring; 23-hydraulic jacks;
31-bolt connection holes; 32-jack target position plate.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the specific contents of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a retractable circular shaft support device, including:
the upper retaining wall side wall, the annular steel waist beam, the lower retaining wall side wall, the upper annular supporting unit, the lower annular supporting unit, the three vertical connecting beams and the plurality of limiting blocks; wherein the content of the first and second substances,
the upper soil retaining side wall is a prefabricated corrugated steel plate assembled ring structure; the structure of the lower retaining side wall is the same as that of the upper retaining side wall;
the upper soil retaining side wall, the annular steel waist beam and the lower soil retaining side wall are sequentially arranged from top to bottom to form an annular structure body;
the three vertical connecting beams are uniformly distributed on the inner wall of a circular structure body formed by the upper soil-retaining side wall, the annular steel waist beam and the lower soil-retaining side wall, the middle part of each vertical connecting beam is fixedly connected with the annular steel waist beam through a bolt, and a limiting block is arranged between each vertical connecting beam and each of the upper soil-retaining side wall and the lower soil-retaining side wall;
each vertical connecting beam is respectively provided with an upper supporting position and a lower supporting position, the position of the upper supporting position corresponds to the upper soil retaining side wall, and the position of the lower supporting position corresponds to the lower soil retaining side wall;
the first annular supporting unit is arranged inside the upper soil retaining side wall, and three supporting ends of the upper annular supporting unit are respectively supported on upper supporting positions of three vertical connecting beams and can apply a pre-supporting force to the upper soil retaining side wall from the inside;
the structure of the lower annular supporting unit is the same as that of the upper annular supporting unit;
the lower annular supporting unit is arranged inside the lower soil retaining side wall, three supporting ends of the lower annular supporting unit are respectively supported on the lower supporting positions of the three vertical connecting beams, and pre-supporting force can be applied to the lower soil retaining side wall annularly from the inside.
As shown in fig. 2, in the supporting device, the upper retaining wall includes: the prefabricated corrugated steel plate of polylith arc, the tip of every prefabricated corrugated steel plate of arc all is equipped with flange joint, and the prefabricated corrugated steel plate of all arcs passes through flange joint through the tip and assembles the ring structure body through bolted connection.
As shown in fig. 4 and 5, in the above-described supporting device, the upper circumferential support means includes: the device comprises an elastic steel ring, three supporting steel pipes and three hydraulic jacks; wherein the content of the first and second substances,
the three supporting steel pipes are uniformly distributed on the elastic steel ring to form a triangular steel supporting structure;
and the free end of each supporting steel pipe is provided with a hydraulic jack, and the free end of each hydraulic jack is the supporting end.
Referring to fig. 3, in the supporting device, the vertical connecting beam is of a channel steel structure, the middle part of the vertical connecting beam is provided with a bolt connecting hole in bolted connection with the steel waist beam, and the upper end and the lower end of the vertical connecting beam are respectively provided with two jack target plates as an upper supporting position and a lower supporting position.
Referring to fig. 3, in the supporting device, the limiting block is a high-strength concrete prefabricated member, the back surface of the limiting block is a corrugated surface matched with the first soil retaining side wall or the second soil retaining side wall, and the front surface of the limiting block is a plane attached to the vertical connecting beam.
Referring to fig. 3, in the support device, the steel wale is an annular structural body made of square steel, and a plurality of groups of bolt holes for connecting the vertical connecting beams are uniformly formed in the steel wale.
Referring to fig. 1, the embodiment of the present invention further provides a recycling circular shaft supporting method, which adopts a plurality of groups of the recycling circular shaft supporting devices, and comprises the following steps:
step 2, continuously excavating the soil body downwards to the depth of the first layer of annular steel waist beam and the second annular soil-retaining side wall, mounting the annular steel waist beam, and assembling the lower soil-retaining side wall;
step 4, installing limiting blocks in gaps between each vertical connecting beam and the upper and lower retaining side walls, hoisting the second and upper annular supporting units to specified positions, and respectively jacking from three directions in the upper and lower retaining side walls;
and 5, circulating the steps until the vertical shaft is excavated to the target depth.
In the supporting method, in the installation process, the joints at the joint flanges of the adjacent upper and lower soil retaining side walls are staggered, and the joints are away from the limiting blocks for a certain distance.
The supporting device can realize the purpose of quickly assembling and supporting in a vertical shaft structure and recycling after use. (1) The supporting device is simple in structure and good in stress form, can meet different practical engineering requirements, and can be used for rapidly processing vertical shaft structures with various sizes; (2) the supporting device can realize the quick assembly of the excavated vertical shaft, and can be quickly disassembled and recycled along with the landfill after the use, thereby realizing the aim of recycling; (3) the support device can immediately exert strength after being assembled, overcomes the time for exerting the strength of a concrete structure, and can reduce disturbance to soil around an excavation surface to a certain extent; (4) the supporting device completely breaks away from the traditional concrete process, and greatly reduces the environmental pollution.
The embodiments of the present invention are described in further detail below.
As shown in fig. 1 to 5, an embodiment of the present invention provides a retractable circular shaft support device, including: the upper and lower retaining side walls, the annular steel waist beam, the three vertical connecting beams, the plurality of limiting blocks and the upper and lower annular supporting units;
the upper and lower retaining walls have the same structure, and each retaining wall has a ring structure of an assembled structure formed by a plurality of sections of arc-shaped corrugated steel plates 11, wherein the arc angle of each arc-shaped corrugated steel plate is usually 60 degrees, 90 degrees or 120 degrees, or can be correspondingly adjusted according to actual needs. And joint flanges 12 are arranged at two ends of each corrugated steel plate, and the quick assembly of the side wall of the retaining soil can be realized through bolt connection.
The supporting devices of the structure are in a group, and the number of the groups used in the supporting can be determined according to the excavation depth.
In the supporting device, the annular steel waist beam is an annular structure body made of square steel and is fixed at the joint of the upper and lower retaining side walls (namely the upper and lower retaining side walls) to realize the inter-ring connection of the retaining side walls.
Among the above-mentioned strutting arrangement, vertical tie-beam is the channel-section steel structure, and the back can carry out bolted connection with annular steel waist roof beam, realizes the vertical fixed of steel waist roof beam and every ring retaining wall lateral wall.
Among the above-mentioned supporting device, the stopper is small-size high-strength concrete prefabricated part, is located the intermediate position of vertical tie-beam and upper and lower part retaining wall lateral wall, realizes the transmission effect of power.
Among the above-mentioned supporting device, upper and lower part hoop support unit structure is the same, all includes three support steel pipe, three hydraulic jack and an elastic steel ring, and three support steel pipe connects on an elastic steel ring jointly, and the free end of three support steel pipe all sets up a hydraulic jack, forms triangle-shaped steel bearing structure, because hydraulic jack sets up in the tip of supporting the steel pipe to the top pushes up extremely on the vertical tie-beam, can exert the pre-supporting power to the fender soil lateral wall that supports.
Example (b):
the present embodiment provides a recyclable circular shaft support device, which is structurally shown in fig. 1 to 5, and includes: the device comprises an upper soil retaining side wall 1, a lower soil retaining side wall 6, a limiting block 5, three vertical connecting beams 3, an annular steel waist beam 4, an upper annular supporting unit 2 and a lower annular supporting unit 7; wherein, the annular steel waist beam 14 is positioned at the two ring joints of the upper soil-retaining side wall 1 and the lower soil-retaining side wall 6 to realize inter-ring splicing; each vertical connecting beam 3 is fixed on the annular steel wale 4 through a bolt; the limiting block 5 is arranged between the upper soil retaining side wall 1 and each vertical connecting beam 3; the upper annular supporting unit 2 and the lower annular supporting unit 7 are respectively supported on each vertical connecting beam 3 and are opposite to the central position of the limiting block 2.
Among the above-mentioned supporting device, upper portion retaining wall 1 is the same with 6 structures in lower part retaining wall, and wherein, upper portion retaining wall 1 comprises the arc corrugated steel plate 11 of different radians, and each arc corrugated steel plate 11's both ends all are equipped with joint flange 12, and the concatenation is accomplished the back and is locked with bolt fastening joint flange 12, realizes assembling of monocycle retaining wall. The corrugated steel plate 11 is a corrugated steel plate with the thickness of 8mm, the wave height and the wave width are determined according to the diameter and the depth of the vertical shaft, and the vertical shaft with the larger diameter and the larger depth adopts the corrugated steel plate with the large wave height and the large wave width.
In the supporting device, the annular steel waist beam 4 is an annular structure body made of square steel, and the outer side of the annular steel waist beam is tightly attached to the joint of the two retaining side walls 11. The inner side is provided with a bolt connecting hole 31 which is connected with the vertical connecting beam 3.
In the supporting device, an upper annular supporting unit 2 and a lower annular supporting unit 7 have the same structure, wherein the upper annular supporting unit 2 consists of three supporting steel pipes 22, an elastic steel ring 21 and three hydraulic jacks 23; each hydraulic jack 23 is supported between one supporting steel pipe 22 and a jack target plate 32 of the vertical connecting beam 3, so that the application process of the pre-tightening force is realized, and the pre-tightening force can be adjusted according to the use environment or the engineering requirement.
In the supporting device, the limiting block 5 is a small high-strength concrete prefabricated component, is arranged on the inner side of the upper soil retaining side wall 1, the back areas of the lower soil retaining side wall 6 and each vertical connecting beam 3, and is opposite to the axle center of the hydraulic jack 23, so that the acting force of the hydraulic jack is transmitted to the upper soil retaining side wall and the lower soil retaining side wall.
The working principle of the supporting device of the invention is as follows: under the action of the pre-pressurizing force, the pre-pressurizing force of the hydraulic jack can be applied to the side wall of each soil retaining wall, and the purpose of rapid supporting is achieved. Because the circular structure is better stressed, the joint flange can realize the stress transmission at the splicing seam, so that the splicing circular ring becomes a whole to the maximum extent. Partial reaction force of the soil body to the side wall of the soil retaining wall can be transmitted to the more complete elastic steel ring along the supporting steel pipe, and stress transmission is achieved.
The supporting device of the invention is installed and used as follows:
step 1) excavating a vertical shaft soil body in a target area stratum to a ring depth, assembling an upper soil retaining side wall 1, and connecting a joint flange 12;
step 2), continuously excavating the soil body downwards to a second ring depth, assembling the lower soil retaining side wall 6 and connecting the joint flange 12; the annular steel wale 4 is installed immediately, so that the phenomenon that the overall stability of the structure is influenced due to uneven staggered joints of the two rings is prevented;
step 3), installing a vertical connecting beam 3, connecting the vertical connecting beam to the annular steel waist beam 4 by using a bolt, and finally checking the verticality of the vertical connecting beam;
step 4), installing a limiting block 5 in a gap behind the vertical connecting beam, hoisting the upper annular supporting unit 2 and the lower annular supporting unit 7 to specified positions, jacking the hydraulic jacks 23 in three directions, and jacking the hydraulic jacks to a jack target plate 32;
and 5) circulating the steps until the vertical shaft is excavated to the target depth. During installation, the joints at the joint flanges 12 of the two adjacent rings are staggered, and the joints are away from the limiting blocks 5 for a certain distance.
The dismounting process of the supporting device of the invention is as follows:
step 11), after the construction is finished, firstly filling soil into the vertical shaft to the half height of the lowest retaining side wall 1 of one ring;
step 12) retracting the hydraulic jack 23 of the ring, and dismantling the annular supporting unit of the ring;
step 13), disassembling the vertical connecting beam 3 and the limiting block 5;
step 14), dismantling the annular steel waist beam 4 and disconnecting the two annular soil retaining side walls;
step 15) disassembling the connecting bolts of the joint flange 12, and taking down each part of the annular corrugated steel plate 11 of the ring to finish the disassembly work of the soil retaining side wall of the ring;
step 16) quickly filling soil and compacting;
and step 17) repeating the steps to finish the disassembly of the vertical shaft structure.
The supporting device with the structure can realize rapid assembly of the excavation vertical shaft, and the structure applying the pretightening force and the retaining side wall are two separated structures, so that the supporting device is convenient to operate, can provide larger pre-supporting force, is better in supporting stability and is easily accepted by constructors.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a circular shaft support device of recovery formula which characterized in that includes:
the upper retaining wall side wall, the annular steel waist beam, the lower retaining wall side wall, the upper annular supporting unit, the lower annular supporting unit, the three vertical connecting beams and the plurality of limiting blocks; wherein the content of the first and second substances,
the upper soil retaining side wall is a prefabricated corrugated steel plate assembled ring structure; the structure of the lower retaining side wall is the same as that of the upper retaining side wall;
the upper soil retaining side wall, the annular steel waist beam and the lower soil retaining side wall are sequentially arranged from top to bottom to form an annular structure body;
the three vertical connecting beams are uniformly distributed on the inner wall of a circular structure body formed by the upper soil-retaining side wall, the annular steel waist beam and the lower soil-retaining side wall, the middle part of each vertical connecting beam is fixedly connected with the annular steel waist beam through a bolt, and a limiting block is arranged between each vertical connecting beam and each of the upper soil-retaining side wall and the lower soil-retaining side wall;
each vertical connecting beam is respectively provided with an upper supporting position and a lower supporting position, the position of the upper supporting position corresponds to the upper soil retaining side wall, and the position of the lower supporting position corresponds to the lower soil retaining side wall;
the first annular supporting unit is arranged inside the upper soil retaining side wall, and three supporting ends of the upper annular supporting unit are respectively supported on upper supporting positions of three vertical connecting beams and can apply a pre-supporting force to the upper soil retaining side wall from the inside;
the structure of the lower annular supporting unit is the same as that of the upper annular supporting unit;
the lower annular supporting unit is arranged inside the lower soil retaining side wall, three supporting ends of the lower annular supporting unit are respectively supported on the lower supporting positions of the three vertical connecting beams, and pre-supporting force can be applied to the lower soil retaining side wall annularly from the inside.
2. The retractable circular shaft support apparatus of claim 1, wherein the upper retaining sidewall comprises: the prefabricated corrugated steel plate of polylith arc, the tip of every prefabricated corrugated steel plate of arc all is equipped with flange joint, and the prefabricated corrugated steel plate of all arcs passes through flange joint through the tip and assembles the ring structure body through bolted connection.
3. The retractable circular shaft support device as claimed in claim 1 or 2, wherein the upper circumferential support unit comprises: the device comprises an elastic steel ring, three supporting steel pipes and three hydraulic jacks; wherein the content of the first and second substances,
the three supporting steel pipes are uniformly distributed on the elastic steel ring to form a triangular steel supporting structure;
and the free end of each supporting steel pipe is provided with a hydraulic jack, and the free end of each hydraulic jack is the supporting end.
4. The round shaft supporting device of claim 1 or 2, wherein the vertical connecting beam is of a channel steel structure, the middle part of the vertical connecting beam is provided with a bolt connecting hole connected with the steel waist beam through a bolt, and the upper end and the lower end of the vertical connecting beam are respectively provided with two jack target plates as an upper support position and a lower support position.
5. The round shaft support device of claim 1 or 2, wherein the stopper is a high-strength concrete prefabricated member, the back of the stopper is a corrugated surface matched with the first retaining side wall or the second retaining side wall, and the front of the stopper is a plane attached to the vertical connecting beam.
6. The round shaft support device of claim 1 or 2, wherein the steel wale is an annular structure made of square steel, and a plurality of groups of bolt holes for connecting the vertical connecting beams are uniformly formed in the steel wale.
7. A method for supporting a circular shaft in a recycling manner, which is characterized in that a plurality of groups of the circular shaft supporting devices in the recycling manner of any one of claims 1 to 6 are adopted, and the method comprises the following steps:
step 1, excavating a vertical shaft soil body in a target area stratum to the depth of a first ring soil retaining side wall, assembling an upper soil retaining side wall and supporting the upper soil retaining side wall into the excavated vertical shaft soil body;
step 2, continuously excavating the soil body downwards to the depth of the first layer of annular steel waist beam and the second annular soil-retaining side wall, mounting the annular steel waist beam, and assembling the lower soil-retaining side wall;
step 3, installing each vertical connecting beam, and connecting the vertical connecting beams to the annular steel waist beam by using bolts to enable each vertical connecting beam to be perpendicular to the ground;
step 4, installing limiting blocks in gaps between each vertical connecting beam and the upper and lower retaining side walls, hoisting the second and upper annular supporting units to specified positions, and respectively jacking from three directions in the upper and lower retaining side walls;
and 5, circulating the steps until the vertical shaft is excavated to the target depth.
8. The round shaft support method of claim 7, wherein in the method,
in the installation process, the joints at the joint flanges of the adjacent upper and lower soil retaining side walls are staggered, and the joints are away from the limiting blocks for a certain distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911061244.XA CN110671114B (en) | 2019-11-01 | 2019-11-01 | Recovery type round vertical shaft supporting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911061244.XA CN110671114B (en) | 2019-11-01 | 2019-11-01 | Recovery type round vertical shaft supporting device and method |
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| Publication Number | Publication Date |
|---|---|
| CN110671114A true CN110671114A (en) | 2020-01-10 |
| CN110671114B CN110671114B (en) | 2024-05-03 |
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| CN201911061244.XA Active CN110671114B (en) | 2019-11-01 | 2019-11-01 | Recovery type round vertical shaft supporting device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215524A (en) * | 2021-12-16 | 2022-03-22 | 哈尔滨工业大学 | Corrugated steel shotcrete shaft is strutted |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215524A (en) * | 2021-12-16 | 2022-03-22 | 哈尔滨工业大学 | Corrugated steel shotcrete shaft is strutted |
| CN114215524B (en) * | 2021-12-16 | 2024-02-20 | 哈尔滨工业大学 | Corrugated steel shotcrete shaft support |
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| CN110671114B (en) | 2024-05-03 |
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