CN103541733A - Shield vertical shaft assembling type concrete-filled steel tube inner support system and construction method thereof - Google Patents
Shield vertical shaft assembling type concrete-filled steel tube inner support system and construction method thereof Download PDFInfo
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- CN103541733A CN103541733A CN201310480442.6A CN201310480442A CN103541733A CN 103541733 A CN103541733 A CN 103541733A CN 201310480442 A CN201310480442 A CN 201310480442A CN 103541733 A CN103541733 A CN 103541733A
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Abstract
The invention relates to a shield vertical shaft assembling type concrete-filled steel tube inner support system and a construction method thereof and belongs to the technical field of shield vertical shaft inner support. The system comprises multiple layers of concrete-filled steel tube inner support frames. Each concrete-filled steel tube inner support frame is spliced by four kinds of rectangular concrete-filled steel tube components including standard rectangular concrete-filled steel tube straight supports, rectangular concrete-filled steel tube straight corners, rectangular concrete-filled steel tube tee joints and rectangular concrete-filled steel tube short connection straight supports. Fast component connection is completed by high-strength bolts. Each component is formed by filling micro-expansion concrete into steel tubes with rectangular sections. Assembling construction of the inner support system is achieved, the problems that steel support is poor in overall stability and small in rigidity and has internal rust are solved, the problems that concrete support is complex in construction and high in manufacturing cost are solved, and the concrete-filled steel tube inner support system is good in integrity and reusable, and capable of strictly controlling structural deformation.
Description
Technical field
The present invention relates to a kind of shield structure vertical shaft assembly concrete-filled steel tube inner support system and job practices thereof, be particularly related to a kind of integrality good, can strict control structure be out of shape, the concrete filled steel tube inner support system that can reuse, belongs to shield structure vertical shaft inner support support technology field.
Background technology
At present, underground space development has become the requisite part of urban construction, and the application of shield structure is more and more many, and the supporting form that the construction of shield structure work shaft extensively adopts has steel to support and concrete support.The subject matter existing in steel support applications process has: it is not firm that steel support is connected with waist (hat) beam, and resistance to overturning is poor; Steel support stiffness is little, and when foundation ditch span is larger, steel supports can be because of the excessive unstability of amount of deflection; It is serious that steel supports internal corrosion situation, and recycling rate of waterused is low.The subject matter existing in concrete support application process has: construction will be through on-the-spot assembling reinforcement, and the operations such as formwork and form removal are made and construction complexity, and the duration is longer; Generally, as temporary structure, after construction completes, need explosion or manual demolition, cost is high.The present invention (for shield structure work shaft assembly concrete-filled steel tube inner support system) can be shield structure work shaft and provide a kind of safer, economic inner support system.
Summary of the invention
In order to overcome the deficiency of existing shield structure work shaft support technology, the invention provides a kind of shield structure vertical shaft assembly concrete-filled steel tube inner support system and job practices thereof.Can effectively solve that the resistance to overturning that steel supports is poor, rigidity is little, the problem of internal corrosion, also can effectively solve the problem that construction is complicated, cost is high of concrete support.
The technical solution adopted in the present invention is:
A kind of shield structure vertical shaft assembly concrete-filled steel tube inner support system, comprise shield structure vertical shaft and concrete filled steel tube inner support system, it is characterized in that: described concrete filled steel tube inner support system is by composite steel pipe concrete inner support system framework, described concrete filled steel tube inner support framework comprises steel tube concrete fortifield village purlin and concrete filled steel tube inner support, and forms by concrete-filled rectangular steel tube component assembly; Described concrete-filled rectangular steel tube member comprises that the support of concrete-filled rectangular steel tube standard straight, concrete-filled rectangular steel tube right angle, concrete-filled rectangular steel tube threeway and concrete-filled rectangular steel tube short circuit directly support;
The support of concrete-filled rectangular steel tube standard straight, concrete-filled rectangular steel tube right angle, concrete-filled rectangular steel tube threeway and the concrete-filled rectangular steel tube short circuit of surrounding directly supports to interconnect and encloses the described steel tube concrete of formation fortifield village purlin; Wherein, the two ends of two concrete-filled rectangular steel tube standard straight supports on the long limit of steel tube concrete fortifield village purlin are connected with one end that one end and the concrete-filled rectangular steel tube short circuit at concrete-filled rectangular steel tube right angle directly support respectively, and the other end that two described concrete-filled rectangular steel tube short circuits directly support is connected with the two ends of a concrete-filled rectangular steel tube threeway respectively;
The middle concrete-filled rectangular steel tube standard straight that is provided with of described steel tube concrete fortifield village's purlin supports, this concrete-filled rectangular steel tube standard straight support one end is connected with the 3rd end of described concrete-filled rectangular steel tube threeway, the other end is directly supportted with the 3rd end of concrete-filled rectangular steel tube threeway described in another and is connected by a concrete-filled rectangular steel tube short circuit, jointly forms described concrete filled steel tube inner support;
Described concrete filled steel tube inner support framework, with three-legged support support, is supported horizontally inside shield structure vertical shaft inner side, and steel tube concrete fortifield village purlin outward flange and shield structure vertical shaft inwall are closely connected.
Described three-legged support is fixed by expansion bolt.
The support of described concrete-filled rectangular steel tube standard straight for length be the standard component of 6m, 3m, 2m or 1m; Concrete-filled rectangular steel tube short circuit directly supports according to the assembled length needs of engineering, and customized production, is less than 1m, plays polishing filling effect.
All concrete-filled rectangular steel tube member cross sections are rectangle, and identical.For the member that forms steel tube concrete fortifield village purlin, long limit (height) the along continuous straight runs setting of its square-section; For the member that forms concrete filled steel tube inner support, the setting of the minor face of its square-section (wide) along continuous straight runs.
Described concrete-filled rectangular steel tube member is to fill by lightweight, slightly expanded concrete the steel tube-concrete composite structure that rectangular steel pipe forms.Described rectangular steel pipe depth of section is 0.2m-2m, and width is 0.2-1.5m, and cross section depth-width ratio is 1.0-2.0, and the ratio of rectangular steel pipe wall thickness and breadth of section is 0.01-0.1, and lightweight, slightly expanded concrete intensity are got CL20-CL50.
Described shield structure vertical shaft assembly concrete-filled steel tube inner support system also comprises the end-plate that is welded in concrete-filled rectangular steel tube component ends, end-plate three faces are extended with the edge of a wing, on the edge of a wing, be reserved with bolt hole, diameter of bolt hole is not more than the thickness of end-plate, for the bolt between concrete-filled rectangular steel tube member, connects.For all concrete-filled rectangular steel tube members, the shape of end-plate, end-plate are all identical with the relative position of concrete-filled rectangular steel tube component ends and the position of end-plate prepared screw-bolt hole.
Further, be welded with the polygon floor of putting more energy between described rectangular steel pipe and end-plate, the thickness of the floor of putting more energy into is all not less than the thickness of rectangular steel pipe and end-plate.Put more energy into floor and steel tube-concrete composite structure, end-plate forms concrete-filled rectangular steel tube member jointly.The described floor of putting more energy into is with the form of groove weld, and both sides are welded on respectively on rectangular steel pipe and end-plate.
The complete batch production manufacture of described concrete-filled rectangular steel tube member, can become concrete filled steel tube inner support system by on-the-spot quick-assembling; After construction finishes, concrete filled steel tube inner support system is disassembled into multistage concrete-filled rectangular steel tube member, from vertical shaft, hangs out, can be for recycling.
The job practices of above-mentioned shield structure vertical shaft assembly concrete-filled steel tube inner support system, step is as follows:
The first step, the batch production manufacture of concrete-filled rectangular steel tube member: in factory, requirement according to design drawing to member kind, size, number, processing and fabricating concrete-filled rectangular steel tube standard straight support respectively, concrete-filled rectangular steel tube short circuit directly support, concrete-filled rectangular steel tube right angle and concrete-filled rectangular steel tube threeway; Concrete-filled rectangular steel tube component ends is sealed by end-plate; The edge of a wing is set on concrete-filled rectangular steel tube member, put more energy into floor prepared screw-bolt hole;
Second step, prepares before the construction of concrete-filled rectangular steel tube member and built-up member: the concrete-filled rectangular steel tube member that Jiang factory manufactures is transported to outside the venue, notices that end-plate does not stretch out under one side direction of the edge of a wing, forbids that member stacks in transportation; Outside the venue, according to design drawing, connect the support of adjacent rectangle concrete filled steel tube standard straight and concrete-filled rectangular steel tube short circuit and directly support, make it to become concrete filled steel tube and spell long joining section and prepare concrete filled steel tube inner support system built-up member;
The 3rd step, the excavation of the earthwork: the shaft excavation of shield structure should be carried out from top to bottom successively, layer and section excavation, shaft excavation to concrete filled steel tube inner support system is set up lower 0.5 meter of of absolute altitude, set up immediately concrete filled steel tube inner support system, and arrange fender post horizontal distortion monitoring point, monitoring fender post convergent deformation value, control the horizontal distortion amount of concrete filled steel tube inner support system, judge according to this stressed and stable case of fender post; When digging when apart from 0.3m place, shield structure vertical shaft shaft bottom, draw logical line traffic control substrate absolute altitude, operating personnel carry out groove clearly according to line point, must not disturbance undisturbed soil;
The 4th step, the setting up of concrete filled steel tube inner support system:
First, set up A-frame, wherein, first road concrete filled steel tube inner support framework is directly erected on shield structure vertical shaft Guan Liang, for Fei Shou road concrete filled steel tube inner support framework, until soil excavation after absolute altitude, be according to design drawing unwrapping wire, measurement, location, determine the position of steel tube concrete fortifield village purlin on shield structure vertical shaft inwall, thereby determine the position of A-frame; On shield structure vertical shaft inwall, set expansion bolt, fixedly angle steel A-frame;
Then, hang in and pass through the assembled steel tube concrete of built-up member fortifield village's purlin and concrete filled steel tube inner support;
Finally, spray slightly expanded concrete, with slightly expanded concrete, the space between steel tube concrete fortifield village purlin and shield structure vertical shaft inwall is tamped, so far, having set up of concrete filled steel tube inner support framework;
The erection process of each road concrete filled steel tube inner support framework is all identical, therefore repeat above-mentioned erection process, has completed setting up of concrete filled steel tube inner support system;
The 5th step, the dismounting of concrete filled steel tube inner support system: after having constructed in agent structure and air channel, concrete filled steel tube inner support system is removed, demolishing process You Shou road concrete filled steel tube inner support framework carries out downwards one by one again, and the demolishing process of per pass concrete filled steel tube inner support framework is identical.
Beneficial effect
Compared with prior art, the invention has the beneficial effects as follows:
Realized the complete batch production manufacture of concrete-filled rectangular steel tube member, crudy is protected, and mechanical property is more reliable; Realize the on-the-spot quick-assembling of concrete-filled rectangular steel tube member, reduced labour intensity and the construction sequence of job site, saved setting up the time of concrete filled steel tube inner support system, can effectively control deformable shaft.
With bolt, connect concrete-filled rectangular steel tube member, form concrete filled steel tube inner support frame construction, connect fasteningly between member, realized the integrated design of steel tube concrete fortifield village purlin and concrete filled steel tube inner support, resistance to overturning is good.
Rectangular steel pipe is wrapped in lightweight, slightly expanded concrete, makes concrete be three-dimensional stress, has improved concrete intensity; Meanwhile, concrete filling effect can prevent steel pipe generation cripling destruction.Steel tube-concrete composite structure has good mechanical property.
Steel tube section is rectangular, can increase long side direction second moment of area, improves bending rigidity; Select lightweight, microdilatancy core concrete as packing material, can reduce dead load, add the bonding of reinforced concrete and steel pipe, improve steel pipe to concrete cuff effect.
Lightweight slightly expanded concrete is full of rectangular steel pipe, has intercepted empty G&W and has entered steel duct, and steel pipe is not perishable.
Assembly concrete-filled steel tube inner support system can reuse, economic environmental protection.
Accompanying drawing explanation
Fig. 1, concrete filled steel tube inner support frame diagram;
Fig. 2, concrete-filled rectangular steel tube standard straight support schematic diagram;
Fig. 3, concrete-filled rectangular steel tube right angle schematic diagram;
Fig. 4, concrete-filled rectangular steel tube threeway schematic diagram;
Fig. 5, concrete-filled rectangular steel tube short circuit directly support schematic diagram;
Fig. 6, concrete-filled rectangular steel tube schematic cross-section;
Fig. 7, end-plate schematic diagram;
Fig. 8, the floor schematic diagram of putting more energy into;
Fig. 9, A-frame schematic diagram;
Figure 10, concrete filled steel tube inner support system side elevational view;
In figure: the support of 1-concrete-filled rectangular steel tube standard straight; 2-concrete-filled rectangular steel tube right angle; The threeway of 3-concrete-filled rectangular steel tube; 4-concrete-filled rectangular steel tube short circuit directly supports; 5-rectangular steel pipe; 6-lightweight, slightly expanded concrete; 7-end-plate; The 8-edge of a wing; 9-bolt hole; The 10-floor of putting more energy into; 11-A-frame; 12-expansion bolt; 13-Guan Liang; 14-concrete filled steel tube inner support framework.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Basic thought of the present invention is by assembled concrete-filled rectangular steel tube member, forms a kind of integrality good, and rigidity is large, the inner support system that can reuse.
Embodiment:
The long 22.8m of certain shield structure vertical shaft, wide 15.9m, dark 30.77m, the supporting form of space enclosing structure adopts assembly concrete-filled steel tube inner support system.Comprise that shield structure vertical shaft and concrete filled steel tube inner support system concrete filled steel tube inner support system are comprised of composite steel pipe concrete inner support framework 14, comprise steel tube concrete fortifield village purlin and concrete filled steel tube inner support, and form by concrete-filled rectangular steel tube component assembly.Concrete-filled rectangular steel tube member comprises that concrete-filled rectangular steel tube standard straight support 1, concrete-filled rectangular steel tube right angle 2, concrete-filled rectangular steel tube threeway 3 and concrete-filled rectangular steel tube short circuit directly support 4.Concrete-filled rectangular steel tube standard straight support 1, concrete-filled rectangular steel tube right angle 2, concrete-filled rectangular steel tube threeway 3 and the concrete-filled rectangular steel tube short circuit of surrounding directly supports 4 and interconnects and enclose the described steel tube concrete of formation fortifield village purlin.Wherein, the two ends of two concrete-filled rectangular steel tube standard straight supports 1 on the long limit of steel tube concrete fortifield village purlin are directly supportted one end of 4 with the one end at concrete-filled rectangular steel tube right angle 2 and concrete-filled rectangular steel tube short circuit respectively and are connected, and two described concrete-filled rectangular steel tube short circuits directly support 4 the other end and are connected with the two ends of a concrete-filled rectangular steel tube threeway 3 respectively.In the middle of steel tube concrete fortifield village purlin, be provided with concrete-filled rectangular steel tube standard straight support 1, this concrete-filled rectangular steel tube standard straight supports 1 one end and is connected with the 3rd end of concrete-filled rectangular steel tube threeway 3, the other end directly supports 4 by a concrete-filled rectangular steel tube short circuit and is connected with the 3rd end of concrete-filled rectangular steel tube threeway 3 described in another, jointly forms described concrete filled steel tube inner support.Concrete filled steel tube inner support framework 14, with three-legged support 11 supports, is supported horizontally inside shield structure vertical shaft inner side, and steel tube concrete fortifield village purlin outward flange and shield structure vertical shaft inwall are closely connected, and three-legged support 11 is fixed by expansion bolt and shield structure vertical shaft inwall.Shield structure vertical shaft assembly concrete-filled steel tube inner support system also comprises the end-plate 7 that is welded in concrete-filled rectangular steel tube component ends, end-plate 7 three faces are extended with the edge of a wing 8, on the edge of a wing 8, be reserved with bolt hole 9, bolt hole 9 diameters are not more than the thickness of end-plate 7, for the bolt between concrete-filled rectangular steel tube member, connect.For all concrete-filled rectangular steel tube members, the shape of end-plate 7, end-plate 7 are all identical with the relative position of concrete-filled rectangular steel tube component ends and the position of end-plate 7 prepared screw-bolt holes 9.Meanwhile, be welded with the polygon floor 10 of putting more energy between rectangular steel pipe 5 and end-plate 7, the thickness of the floor 10 of putting more energy into is all not less than the thickness of rectangular steel pipe 5 and end-plate 7.The floor 10 of putting more energy into forms concrete-filled rectangular steel tube member jointly with steel tube-concrete composite structure, end-plate 7.
The work progress of assembly concrete-filled steel tube inner support system is described in detail as follows, mainly comprise following five construction sequences.
The first step, the batch production manufacture of concrete-filled rectangular steel tube member.
In factory, the requirement according to design drawing to member kind, size, number, respectively processing and fabricating concrete-filled rectangular steel tube standard straight support 1, concrete-filled rectangular steel tube short circuit directly support 4, concrete-filled rectangular steel tube right angle 2 and concrete-filled rectangular steel tube threeway 3.All concrete filled steel tubular member breadth of section are 0.3m, are highly 0.6m, thickness of steel pipe 0.016m.Concrete-filled rectangular steel tube standard straight support 1 comprises multiple different length 6m, 3m, 2m, the standard component of 1m specification.Concrete-filled rectangular steel tube right angle 2, concrete-filled rectangular steel tube threeway 3 comprises respectively a kind of standard component of unified specification; Wherein, 2 liang, concrete-filled rectangular steel tube right angle limb length is isometric is 1m; Concrete-filled rectangular steel tube threeway 3 three limb length are isometric is 1m.Concrete-filled rectangular steel tube short circuit directly supports 4 according to the assembled length needs of engineering, and customized production, is less than 1m, plays polishing filling effect.The material that structure manufacture adopts is 1600 grades of CL30 lightweight slightly expanded concretes, Q345 steel.Above four kinds of members are filled rectangular steel pipe 5 by lightweight slightly expanded concrete 6, form steel tube-concrete composite structure, and steel tube-concrete composite structure end is by end-plate 7 sealings of unified specification 0.05m * 0.07m * 0.016m.All member end shroudings 7 are prepared screw-bolt hole 9 in the same position on the edge of a wing 8 all.Bolt hole 9 diameters are 32mm, and bolt hole 9 spacing are 100mm, and bolt hole 9 is 50mm apart from end-plate 7 Distances Between Neighboring Edge Points.Put more energy into floor 10 with the form of groove weld, and both sides are welded on respectively on rectangular steel pipe 6 and end-plate 7, and the floor 10 of putting more energy into can not stop bolt hole 9, and can not hinder M30 high-strength bolt to screw.
Second step, prepares before the construction of concrete-filled rectangular steel tube member and built-up member.
The concrete-filled rectangular steel tube member that Jiang factory manufactures is transported to outside the venue, notices that end-plate 7 does not stretch out under one side direction of the edge of a wing, forbids that member stacks in transportation.Outside the venue, the requirement according to design drawing to component assembly, connects the support 1 of adjacent rectangle concrete filled steel tube standard straight and concrete-filled rectangular steel tube short circuit and directly supports 4, makes it to become concrete filled steel tube and spells long joining section.For steel tube concrete fortifield village purlin part, that spells long joining section splices length and the position in system outside the venue, to facilitate crane lifting and down-hole to be spliced into standard, drafts; For concrete filled steel tube inner support part, will form all members of inner support part, integral body is spliced into a concrete filled steel tube and spells long joining section, to facilitate the splicing with steel tube concrete fortifield village purlin part.Concrete filled steel tube inner support system built-up member mainly contain: member connection high strength bolt, A-frame set bolt, A-frame 11, bearing steel plate etc.A-frame set bolt adopts expansion bolt 12.A-frame 11 and A-frame set bolt need, by designing requirement processing and fabricating, after normal support concrete filled steel tube inner support system, meet bearing capacity, stability, and the requirement in size.Inner support system built-up member are unified processing, classify and pile up all.
The 3rd step, the excavation of the earthwork.
The shaft excavation of shield structure should be carried out from top to bottom successively, layer and section excavation.Shaft excavation to concrete filled steel tube inner support system is set up lower 0.5 meter of of absolute altitude, set up immediately concrete filled steel tube inner support system, and arrange fender post horizontal distortion monitoring point, monitoring fender post convergent deformation value, control the horizontal distortion amount of concrete filled steel tube inner support system, judge according to this stressed and stable case of fender post.When digging when apart from 0.3m place, shield structure vertical shaft shaft bottom, draw logical line traffic control substrate absolute altitude, operating personnel carry out groove clearly according to line point, must not disturbance undisturbed soil.
The 4th step, the setting up of concrete filled steel tube inner support system.
The whole concrete filled steel tube inner support system Fen Wu road concrete filled steel tube inner support framework 14 of this example, the spacing between adjacent steel pipe concrete inner support framework 14 is not got 3-8m not etc. according to design.The erection process of concrete filled steel tube inner support framework is as follows:
First, set up A-frame 11.First road concrete filled steel tube inner support framework is directly erected on shield structure vertical shaft hat beam 13.For Fei Shou road concrete filled steel tube inner support framework, until soil excavation, after absolute altitude, determine that steel tube concrete fortifield village purlin is at enclosure wall according to design drawing unwrapping wire, measurement, location, i.e. position on shield structure vertical shaft inwall, thus determine the position of A-frame 11.At diaphragm wall, be also enclosure wall, on shield structure vertical shaft inwall, set expansion bolt 12, fixedly angle steel A-frame 11.
Then, assembled steel tube concrete fortifield village purlin.Hang in a concrete-filled rectangular steel tube right angle 2, be put on A-frame 11 assigned addresses; Be close to and hang in member from the close-by examples to those far off, hang in successively and spell long joining section in the concrete filled steel tube having spliced outside the venue, guarantee that the long section of splicing is positioned on same axis, bolt hole 9 alignment, and connect abutting end shrouding 7 with bolt, straight for guaranteeing, bolt is tightened by diagonal angle order simultaneously.The long limit of member section/high direction level, the one side of not stretching out the edge of a wing is closely connected with shield structure vertical shaft inwall inwall, and whole process is wanted slowly careful carrying out, and prevents from impacting A-frame 11.So far, steel tube concrete fortifield village purlin forms complete rectangular frame structure.
Then, assembled concrete filled steel tube inner support.Hang in the whole concrete filled steel tube that forms concrete filled steel tube inner support and spell long joining section, minor face/cross direction level of member section, do not stretch out the edge of a wing one facing up, and enclose the member end shrouding 7 stretching out at purlin middle part and be close to and align, and connect closely connected end-plate 7 with bolt.Straight for guaranteeing, bolt is tightened by diagonal angle order simultaneously.Note not clashing into the steel tube concrete fortifield village purlin having set up.
Finally, spray slightly expanded concrete.With slightly expanded concrete, the space between steel tube concrete fortifield village purlin and shield structure vertical shaft inwall is tamped, contribute to the power transmission of being close between concrete filled steel tube inner support system and enclosure wall inwall.So far, concrete filled steel tube inner support framework has set up.
The erection process of each road concrete filled steel tube inner support framework is all identical, therefore repeat above-mentioned erection process 5 times, has completed setting up of concrete filled steel tube inner support system.
The 5th step, the dismounting of concrete filled steel tube inner support system.
After having constructed in agent structure and air channel, then concrete filled steel tube inner support system is removed.Demolishing process You Shou road concrete filled steel tube inner support framework 14 carries out downwards one by one.The demolishing process of per pass concrete filled steel tube inner support framework 14 is identical, first, with straddle truck, the whole concrete filled steel tube that forms concrete filled steel tube support section spelled to long joining section two ends and slings gently, become flexible and screw off the bolt at two ends, by spelling long joining section by slowly hanging out in vertical shaft.Then ，Jiang steel tube concrete fortifield village purlin splits into spelling long joining section identical when hanging in, respectively by slowly hanging out in vertical shaft.Finally, remove A-frame.
As above five steps have formed the main body process that concrete filled steel tube inner support system is made and constructed.Now soil excavation the 3rd step and the relation of setting up concrete filled steel tube inner support system the 4th step two procedures are remarked additionally.This example need set up five road concrete filled steel tube inner support frameworks 14 altogether, and soil excavation will intersect and carry out with setting up of concrete filled steel tube inner support system, close fit.After design elevation is dug in the earthwork, set up in time concrete filled steel tube inner support system, reduce without supporting open-assembly time, stable to guarantee that concrete filled steel tube supports.The detailed construction order of two-step is as follows: measure unwrapping wire → top soil excavation → set up first supports → first step soil excavation → set up second supports → second step soil excavation and spray concrete dado → set up San road and support → the three soil excavation and spray concrete dado → set up Si road support the → the four step soil excavation and spray concrete dado → set up Wu road support the → the five step soil excavation and spray concrete dado.
Be more than an exemplary embodiments of the present invention, enforcement of the present invention is not limited to this.
Claims (10)
1. a shield structure vertical shaft assembly concrete-filled steel tube inner support system, comprise shield structure vertical shaft and concrete filled steel tube inner support system, it is characterized in that: described concrete filled steel tube inner support system is comprised of composite steel pipe concrete inner support framework (14), described concrete filled steel tube inner support framework (14) comprises steel tube concrete fortifield village purlin and concrete filled steel tube inner support, and forms by concrete-filled rectangular steel tube component assembly; Described concrete-filled rectangular steel tube member comprises that the support of concrete-filled rectangular steel tube standard straight (1), concrete-filled rectangular steel tube right angle (2), concrete-filled rectangular steel tube threeway (3) and concrete-filled rectangular steel tube short circuit directly support (4);
Concrete-filled rectangular steel tube standard straight support (1), concrete-filled rectangular steel tube right angle (2), concrete-filled rectangular steel tube threeway (3) and the concrete-filled rectangular steel tube short circuit of surrounding directly supports (4) and interconnects to enclose and form described steel tube concrete fortifield village purlin; Wherein, the two ends of the two concrete-filled rectangular steel tube standard straight supports (1) on every long limit of steel tube concrete fortifield village purlin are connected with one end that one end and the concrete-filled rectangular steel tube short circuit of concrete-filled rectangular steel tube right angle (2) directly support (4) respectively, and the other end that two described concrete-filled rectangular steel tube short circuits directly support (4) is connected with the two ends of a concrete-filled rectangular steel tube threeway (3) respectively; Between two concrete-filled rectangular steel tube right angles (2) other end on every minor face of described steel tube concrete fortifield village's purlin, be connected with concrete-filled rectangular steel tube standard straight support (1) and concrete-filled rectangular steel tube short circuit and directly support (4);
The middle concrete-filled rectangular steel tube standard straight that is provided with of described steel tube concrete fortifield village's purlin supports (1), this concrete-filled rectangular steel tube standard straight support (1) one end is connected with the 3rd end of described concrete-filled rectangular steel tube threeway (3), the other end directly supports (4) by a concrete-filled rectangular steel tube short circuit and is connected with the 3rd end of concrete-filled rectangular steel tube threeway (3) described in another, jointly forms described concrete filled steel tube inner support;
Described concrete filled steel tube inner support framework (14), with three-legged support (11) support, is supported horizontally inside shield structure vertical shaft inner side, and steel tube concrete fortifield village purlin outward flange and shield structure vertical shaft inwall are closely connected.
2. shield structure vertical shaft assembly concrete-filled steel tube inner support system according to claim 1, is characterized in that: described concrete-filled rectangular steel tube standard straight support (1) for length be the standard component of 6m, 3m, 2m or 1m; The length that concrete-filled rectangular steel tube short circuit directly supports (4) is less than 1m.
3. shield structure vertical shaft assembly concrete-filled steel tube inner support system according to claim 1, is characterized in that: for the member that forms steel tube concrete fortifield village purlin, the long edge horizontal direction of its square-section arranges; For the member that forms concrete filled steel tube inner support, the minor face along continuous straight runs of its square-section arranges.
4. shield structure vertical shaft assembly concrete-filled steel tube inner support system according to claim 1, is characterized in that: described concrete-filled rectangular steel tube member is for filling by lightweight, slightly expanded concrete (6) steel tube-concrete composite structure that rectangular steel pipe (5) forms.
5. shield structure vertical shaft assembly concrete-filled steel tube inner support system according to claim 4, it is characterized in that: described rectangular steel pipe (5) depth of section is 0.2m-2m, width is 0.2-1.5m, cross section depth-width ratio is 1.0-2.0, the ratio of rectangular steel pipe (5) wall thickness and breadth of section is 0.01-0.1, and the intensity of lightweight, slightly expanded concrete (6) is CL20-CL50.
6. shield structure vertical shaft assembly concrete-filled steel tube inner support system according to claim 5, it is characterized in that: described shield structure vertical shaft assembly concrete-filled steel tube inner support system also comprises the end-plate (7) that is welded in concrete-filled rectangular steel tube component ends, end-plate (7) three faces are extended with the edge of a wing (8), on the edge of a wing (8), be reserved with bolt hole (9), bolt hole (9) diameter is not more than the thickness of end-plate (7), for the bolt between concrete-filled rectangular steel tube member, connects.
7. shield structure vertical shaft assembly concrete-filled steel tube inner support system according to claim 6, it is characterized in that: between described rectangular steel pipe (5) and end-plate (7), be welded with the polygon floor (10) of putting more energy into, the thickness of the floor of putting more energy into (10) is not less than the thickness of rectangular steel pipe (5) and end-plate (7).
8. shield structure vertical shaft assembly concrete-filled steel tube inner support system according to claim 7, is characterized in that: described in put more energy into floor (10) with the form of groove weld, both sides are welded on respectively on rectangular steel pipe (5) and end-plate (7).
9. shield structure vertical shaft assembly concrete-filled steel tube inner support system according to claim 1, is characterized in that: described three-legged support (11) is fixed by expansion bolt.
10. according to the job practices of shield structure vertical shaft assembly concrete-filled steel tube inner support system described in claim 1-9 any one, it is characterized in that: construction sequence is as follows:
The first step, the batch production manufacture of concrete-filled rectangular steel tube member: in factory, requirement according to design drawing to member kind, size, number, processing and fabricating concrete-filled rectangular steel tube standard straight support (1), concrete-filled rectangular steel tube short circuit directly support (4), concrete-filled rectangular steel tube right angle (2) and concrete-filled rectangular steel tube threeway (3) respectively; Concrete-filled rectangular steel tube component ends is sealed by end-plate (7); The edge of a wing (8), the floor of putting more energy into (10) prepared screw-bolt hole (9) are set on concrete-filled rectangular steel tube member;
Second step, prepares before the construction of concrete-filled rectangular steel tube member and built-up member: the concrete-filled rectangular steel tube member that Jiang factory manufactures is transported to outside the venue, notices that end-plate (7) does not stretch out under one side direction of the edge of a wing, forbids that member stacks in transportation; Outside the venue, according to design drawing, connect adjacent rectangle concrete filled steel tube standard straight support (1) and concrete-filled rectangular steel tube short circuit and directly support (4), make it to become concrete filled steel tube and spell long joining section and prepare concrete filled steel tube inner support system built-up member;
The 3rd step, the excavation of the earthwork: the shaft excavation of shield structure should be carried out from top to bottom successively, layer and section excavation, shaft excavation to concrete filled steel tube inner support system is set up lower 0.5 meter of of absolute altitude, set up immediately concrete filled steel tube inner support system, and arrange fender post horizontal distortion monitoring point, monitoring fender post convergent deformation value, control the horizontal distortion amount of concrete filled steel tube inner support system, judge according to this stressed and stable case of fender post; When digging when apart from 0.3m place, shield structure vertical shaft shaft bottom, draw logical line traffic control substrate absolute altitude, operating personnel carry out groove clearly according to line point, must not disturbance undisturbed soil;
The 4th step, the setting up of concrete filled steel tube inner support system:
First, set up A-frame (11), wherein, first road concrete filled steel tube inner support framework is directly erected on shield structure vertical shaft Guan Liang (13), for Fei Shou road concrete filled steel tube inner support framework, until soil excavation after absolute altitude, be according to design drawing unwrapping wire, measurement, location, determine the position of steel tube concrete fortifield village purlin on shield structure vertical shaft inwall, thereby determine the position of A-frame (11); On shield structure vertical shaft inwall, set expansion bolt (12), fixedly angle steel A-frame (11);
Then, hang in and pass through the assembled steel tube concrete of built-up member fortifield village's purlin and concrete filled steel tube inner support;
Finally, spray slightly expanded concrete, with slightly expanded concrete, the space between steel tube concrete fortifield village purlin and shield structure vertical shaft inwall is tamped, so far, having set up of concrete filled steel tube inner support framework;
The erection process of each road concrete filled steel tube inner support framework is all identical, therefore repeat above-mentioned erection process, has completed setting up of concrete filled steel tube inner support system;
The 5th step, the dismounting of concrete filled steel tube inner support system: after having constructed in agent structure and air channel, again concrete filled steel tube inner support system is removed, demolishing process You Shou road concrete filled steel tube inner support framework (14) carries out downwards one by one, and the demolishing process of per pass concrete filled steel tube inner support framework (14) is identical.
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| CN104747192A (en) * | 2015-01-27 | 2015-07-01 | 中国矿业大学 | Steel tube concrete stress deformation feedback supporting structure suitable for vertical well cylinder |
| CN106088105A (en) * | 2016-07-29 | 2016-11-09 | 天津大学建筑设计研究院 | A kind of assembled foundation ditch Bracing Systems |
| CN108930275A (en) * | 2018-07-25 | 2018-12-04 | 中国铁路设计集团有限公司 | It is a kind of to face forever in conjunction with the ultra-deep shaft rapid constructing method along inverse combination |
| CN109630127A (en) * | 2018-11-22 | 2019-04-16 | 中铁隧道集团二处有限公司 | A kind of construction method of rich water soft stratum ultra-deep shield vertical shaft |
| CN111075452A (en) * | 2019-12-23 | 2020-04-28 | 重庆市轨道交通设计研究院有限责任公司 | Geotechnical mixed vertical shaft engineering supporting system and vertical shaft construction method |
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| CN103114592A (en) * | 2011-11-16 | 2013-05-22 | 龙信建设集团有限公司 | Method for deep excavation pit combination support construction close to subway station |
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| CN103114592A (en) * | 2011-11-16 | 2013-05-22 | 龙信建设集团有限公司 | Method for deep excavation pit combination support construction close to subway station |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747192A (en) * | 2015-01-27 | 2015-07-01 | 中国矿业大学 | Steel tube concrete stress deformation feedback supporting structure suitable for vertical well cylinder |
| CN106088105A (en) * | 2016-07-29 | 2016-11-09 | 天津大学建筑设计研究院 | A kind of assembled foundation ditch Bracing Systems |
| CN108930275A (en) * | 2018-07-25 | 2018-12-04 | 中国铁路设计集团有限公司 | It is a kind of to face forever in conjunction with the ultra-deep shaft rapid constructing method along inverse combination |
| CN109630127A (en) * | 2018-11-22 | 2019-04-16 | 中铁隧道集团二处有限公司 | A kind of construction method of rich water soft stratum ultra-deep shield vertical shaft |
| CN109630127B (en) * | 2018-11-22 | 2020-05-05 | 中铁隧道集团二处有限公司 | Construction method of ultra-deep shield vertical shaft for water-rich weak stratum |
| CN111075452A (en) * | 2019-12-23 | 2020-04-28 | 重庆市轨道交通设计研究院有限责任公司 | Geotechnical mixed vertical shaft engineering supporting system and vertical shaft construction method |
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