CN211849593U - Anti device and anti system that floats of immersed tube lumen template - Google Patents
Anti device and anti system that floats of immersed tube lumen template Download PDFInfo
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- CN211849593U CN211849593U CN202020459435.3U CN202020459435U CN211849593U CN 211849593 U CN211849593 U CN 211849593U CN 202020459435 U CN202020459435 U CN 202020459435U CN 211849593 U CN211849593 U CN 211849593U
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Abstract
The utility model relates to a immersed tube tunnel construction technical field, concretely relates to immersed tube lumen template anti-floating device and anti-floating system, this immersed tube lumen template anti-floating device including installing a plurality of top cushions at lumen template top, this top cushion highly with lumen template top corresponds to the distance of roof steel reinforcement cage, makes the upper portion and the lower part of top cushion respectively with roof steel reinforcement cage and the laminating of lumen template top to rely on the weight restriction lumen template rebound of roof steel reinforcement cage, realize anti-floating purpose, and then guarantee the stability of pouring the process. The mode of adopting the top cushion block, not only structural style is simple, and preparation and installation are all very convenient moreover.
Description
Technical Field
The utility model relates to an immersed tube tunnel construction technical field, in particular to anti device and anti system of floating of immersed tube lumen template.
Background
In the construction process of the immersed tube tunnel, immersed tubes are usually manufactured on a slipway or in a dry dock in advance, then a water-bottom foundation is processed, and finally the immersed tubes are installed on the processed foundation, so that the underwater tunnel is built to realize passing. As shown in fig. 1, most of the existing immersed tube structures adopt a single-box three-chamber type structure, and the immersed tube structure comprises a bottom plate 1, a top plate 2, two side walls 3 and two middle walls 4 in the middle, wherein lane galleries 5 for vehicles to pass through are respectively formed between the middle walls 4 and the two side walls 3, a middle cavity is formed between the two middle walls 4, and the middle cavity is used as a middle gallery 6 for arranging immersed tube accessory facilities.
In the process of prefabricating the immersed tube tunnel, a plurality of tube sections are prefabricated independently, then floating transportation is carried out, the tube sections are installed on a pre-arranged underwater tunnel foundation, and the tube sections are spliced to form a complete immersed tube tunnel structure. When the immersed tube sections are prefabricated, pouring templates need to be arranged on the outer sides of a lane gallery, a middle gallery and the immersed tube sections respectively, a method that the pouring templates of each immersed tube section are independently assembled and disassembled is adopted in the prior art, a middle cavity template system of an immersed tube tunnel is invented, the pouring templates in the middle gallery are divided into a left template and a right template by the middle cavity template system, the left template and the right template are fixed on bent frames, the left bent frame and the right bent frame are connected to a telescopic supporting beam, the left template and the right template can be in place and demoulded by a hydraulic oil cylinder arranged on the supporting beam, the supporting beam is arranged on a main truss, supporting legs with lifting hydraulic oil cylinders are arranged at the end parts of the two ends of the main truss, and the top demould of the pouring templates of the middle gallery is realized by the lifting hydraulic oil cylinder, so that the problems that repeated installation, repeated installation and the demoulding are needed in the, The problem of low construction efficiency caused by repeated disassembly is solved, and the workload of constructors in the middle gallery is greatly reduced.
However, with the solution of the above technical problems, a new technical problem is brought, because the width of the middle gallery is small, and in the process of adopting the immersed tube full-face pouring, because the pouring speed is high, in the middle wall pouring process, the slurry return at the bottom in the middle gallery is particularly serious, which not only influences the molding quality of the precast concrete of the middle gallery, but also has great influence on the structural dimension precision of the middle gallery, for this reason, technicians tentatively adopt a mode of detachably connecting the grouting templates arranged at the bottom of the middle cavity pouring template to connect the grouting templates at the bottoms of the left template and the right template respectively, although the method solves the problem of slurry return, the cavity template in the immersed tube has a floating phenomenon, and the forming quality and precision of the gallery in the immersed tube are influenced, so that how to solve the problem is a difficult problem for construction technicians.
In addition, when examining how to solve the technical problem of floating of the middle cavity template in the prior art, the construction technicians find that, because the prior art basically adopts a layered and segmented pouring mode in the process of prefabricating the immersed tube concrete, no matter which template structural form is adopted by the pouring mode (one mode is that a template is assembled on site for each segment of pouring tube segment, all the templates are disassembled and transferred after the pouring is finished, and all the templates are re-erected when the next segment of pouring tube segment is poured, and the other mode is that the integral type assembling, disassembling and transferring structural form introduced in the application is adopted, the expansion system is not required to be re-erected each time the immersed tube segment is poured, and only the template needs to be controlled to be in place), the floating problem of the middle cavity template does not exist (but the problem of layered and segmented pouring of layered cracks which influence the impermeability of the immersed tube is existed), the formwork structure that all demolish, shift after pouring the completion, all rebuild when pouring the pipeline section to next section again to when adopting full section to pour simultaneously, because cavity template bottom is sealed, be unfavorable for the bubble to discharge on the one hand and influence the quality, on the other hand because the floating force is too big, the solution that faces also can be completely different.
Therefore, in view of the above technical problems, how to balance advantages and disadvantages is found, the method can prevent the middle cavity template from floating upward, ensure the convenient assembly and disassembly of the middle cavity template system, and achieve the effects of low cost and high construction efficiency, thereby being a problem that technicians feel headache.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: the anti-floating device comprises a cushion block arranged at the top of the middle cavity template, the cushion block simultaneously supports against a top plate steel reinforcement cage, the middle cavity template is fixed by means of the self weight of the steel reinforcement cage, and the anti-floating purpose is achieved.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides an anti device that floats of immersed tube lumen template, is including installing a plurality of top cushions at lumen template top, the height of this top cushion with lumen template top corresponds to the distance of roof steel reinforcement cage, makes the upper portion and the lower part of top cushion respectively with roof steel reinforcement cage and the laminating of lumen template top.
The mode that sets up the top cushion through at lumen template top is as the anti device that floats of immersed tube lumen template to rely on the weight restriction lumen template rebound of roof steel reinforcement cage, realize anti purpose of floating, and then guarantee to pour the stability of process. The mode of adopting the top cushion block, not only structural style is simple, and preparation and installation are all very convenient moreover.
As the utility model discloses an optimal scheme, anti device that floats of immersed tube lumen template is still including installing a plurality of lateral part cushion blocks to the lumen template side, a plurality of the thickness of lateral part cushion block with lumen template side corresponds to the distance of well wall steel reinforcement cage, makes the both sides of lateral part cushion block respectively with well wall steel reinforcement cage and the laminating of lumen template side.
Further, a plurality of the side spacers are respectively arranged at both sides of the middle cavity template.
The side cushion blocks are arranged on the side faces of the middle cavity template, on one hand, the side cushion blocks generate a part of lateral force by means of self-weight extrusion of the middle wall steel reinforcement cage, and further friction force is generated between the side cushion blocks and the middle cavity template, on the other hand, in the concrete pouring process, the side cushion blocks are subjected to lateral pressure and pouring load of concrete, the side cushion blocks and the middle cavity template can generate larger friction force, the immersed tube middle cavity template is fixed through the friction force in the two aspects, the anti-floating capacity of the middle cavity template is further improved, and the displacement change condition caused by floating of the middle cavity template under the action of buoyancy is reduced;
in addition, the side cushion blocks are arranged on the side faces of the middle cavity template, so that the middle cavity template can be fixed in the left-right direction, and the situations that the middle cavity template is unstable due to buoyancy and then shakes left and right in the concrete pouring process are effectively reduced.
As the utility model discloses an optimal scheme, all offer on top cushion and the lateral part cushion and be used for pricking the hole that the silk passed and ligature on the reinforcing bar.
Through arranging the hole on top cushion and lateral part cushion, prick the silk and pass on ligature steel reinforcement cage behind the hole, make the cushion fix on steel reinforcement cage, receive the construction influence and take place to drop after avoiding the cushion installation, ensure that top cushion and lateral part cushion do not shift.
As the preferred scheme of the utility model, top cushion and lateral part cushion are the concrete cushion that intensity and concrete protective layer are equivalent.
As the utility model discloses an optimal scheme, top cushion and lateral part cushion are rectangular shape cushion, include with the holding surface of steel reinforcement cage side contact and with the template face of template contact, the template face is the wave.
Set up the template face of cushion into the wave, at the concreting in-process, the concrete can flow into other sunken positions except that the crest for after the form removal, the place of installing the rectangle module only sees the line of fusing of crest department, and does not have the transversal joint that leads to the steel reinforcement cage, has both reduced the influence to the concrete outward appearance, has also increased immersed tube concrete's prevention of seepage permeability.
As the preferred scheme of the utility model, the immersed tube middle cavity template anti-floating device is used in an integrally assembled middle cavity template system, the middle cavity template system comprises a left template connected on a left side bent frame and a right template connected on a right side bent frame, the left template and the right template are respectively arranged at two sides of a middle gallery, the left template and the right template are assembled to form a complete middle cavity template with a certain gap through retractable supporting beams connected on the left side bent frame and the right side bent frame, a transverse retractable system for controlling the space between the left template and the right template is arranged on the supporting beams, the middle cavity template system also comprises a movable template for filling the gap and a main truss positioned between the left side bent frame and the right side bent frame, the main truss is used for placing the supporting beams, a sliding system for making the supporting beams move along the length direction of the main truss is also arranged on the main truss, the middle cavity template system also comprises a grouting template arranged at the bottom of the left template and the bottom of the right template, and the grouting template comprises a left grouting template and a right grouting template which are detachably connected with the left template and the right template respectively.
With the anti device that floats of immersed tube lumen template of this scheme be arranged in the integral well chamber template system of assembling, can solve the problem of pouring the in-process lumen template come-up at full section on the one hand, on the other hand, adopt the integral well chamber template system of assembling, the dismantlement of the well chamber template system of improvement, set up efficiency, construction cost is lower, on the one hand again, through setting up the mud jacking template in the bottom, neither can influence the bubble and discharge, also can avoid the too big problem of well chamber template come-up force, the anti device that floats of immersed tube lumen template of this scheme is applicable to this kind of structure very much.
Correspondingly, this application still provides an anti system of floating of immersed tube lumen template, including adopting as above the anti device of floating of immersed tube lumen template is fixed the lumen template, still including the second arrangement structure who is used for increasing the anti buoyancy of lumen template self and is used for increasing roof steel reinforcement cage weight.
Improve anti ability of floating of immersed tube lumen template is a systematic engineering, not only need rely on external device to realize the fixed of lumen template, thereby reach anti purpose of floating, improve the stability of the process of pouring, adopt the anti system of floating of this scheme simultaneously, through the anti ability of floating of increasing lumen template self, and improve the weight of roof steel reinforcement cage, from the anti device that floats of outside, the three aspect of lumen template self and steel reinforcement cage structure is realized anti floating, the anti ability of floating of lumen template has been promoted by a wide margin, the stability of the process of pouring is strengthened in the progress, guarantee the structure size precision of immersed tube structure.
As the utility model discloses a preferred scheme, the lumen template is installed on the main truss, and this main truss both ends tip is provided with the landing leg respectively, pre-buried component is installed to the bottom below under the landing leg, first arrangement structure include with this landing leg with pre-buried component connection.
Further, the supporting legs are connected with the embedded members through welding or fasteners.
Furthermore, the supporting legs are also connected with fixing bottom plates which are connected with the embedded components through the fixing bottom plates. By adopting the structure form, the supporting leg structure is protected from being damaged.
As the utility model discloses an optimal scheme, second arrangement structure includes and connects into holistic first connection reinforcement group with roof steel reinforcement cage and well wall steel reinforcement cage.
First connecting reinforcement group welds with roof steel reinforcement cage and well wall steel reinforcement cage respectively to make roof steel reinforcement cage and well wall steel reinforcement cage form overall structure, increase roof steel reinforcement cage's weight, and then restrict the come-up of lumen template through the top cushion.
As the utility model discloses an optimal scheme, second arrangement structure still includes and connects into holistic second connecting reinforcement group with bottom plate steel reinforcement cage and well wall steel reinforcement cage.
The second connecting reinforcement group is welded with the bottom plate reinforcement cage and the middle wall reinforcement cage respectively, so that the bottom plate reinforcement cage, the middle wall reinforcement cage and the top plate reinforcement cage form an integral structure, the weight of the top plate reinforcement cage is increased, and the middle cavity template is limited to float through the top cushion block.
Further, well wall steel reinforcement cage still includes the bottom steel reinforcement group that is close to bottom plate steel reinforcement cage including the top steel reinforcement group that is close to roof steel reinforcement cage, top steel reinforcement group extends to roof steel reinforcement cage and rather than the welding, bottom plate steel reinforcement group extends to bottom plate steel reinforcement cage and rather than the welding, further makes bottom plate steel reinforcement cage, well wall steel reinforcement cage and roof steel reinforcement cage form overall structure.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the mode that sets up the top cushion through at lumen template top is as the anti device that floats of immersed tube lumen template to rely on the weight restriction lumen template rebound of roof steel reinforcement cage, realize anti purpose of floating, and then guarantee to pour the stability of process. The mode of the top cushion block is adopted, so that the structure form is simple, and the manufacture and the installation are very convenient;
2. the side cushion blocks are arranged on the side faces of the middle cavity template, on one hand, the side cushion blocks generate a part of lateral force by means of self-weight extrusion of the middle wall steel reinforcement cage, and further friction force is generated between the side cushion blocks and the middle cavity template, on the other hand, in the concrete pouring process, the side cushion blocks are subjected to lateral pressure and pouring load of concrete, the side cushion blocks and the middle cavity template can generate larger friction force, the immersed tube middle cavity template is fixed through the friction force in the two aspects, the anti-floating capacity of the middle cavity template is further improved, and the displacement change condition caused by floating of the middle cavity template under the action of buoyancy is reduced;
3. connect roof steel reinforcement cage and well wall steel reinforcement cage through first connecting reinforcement group to and connect bottom plate steel reinforcement cage and well wall steel reinforcement cage through second connecting reinforcement group, thereby make roof steel reinforcement cage, well wall steel reinforcement cage and bottom plate steel reinforcement cage form overall structure, increase roof steel reinforcement cage's weight, and then restrict the lumen template come-up through the top cushion, increase anti floating performance.
Description of the drawings:
fig. 1 is a schematic view of a single-tank three-chamber type immersed tube structure.
Fig. 2 is a schematic structural view of the anti-floating device of the cavity template in the immersed tube in embodiment 1.
Fig. 3 is a schematic view of the top mat mounting structure in embodiment 1.
Fig. 4 is a schematic view of a top mat mounting structure according to another embodiment of example 1.
Fig. 5 is a schematic structural view of a side pad in embodiment 1.
Fig. 6 is a schematic structural view of an integrally assembled middle cavity template system.
Fig. 7 is a schematic diagram of the arrangement structure of the anti-floating system of the wall template in the immersed tube.
Fig. 8 is a schematic structural view of a main girder for installing a cavity template in a sinking tube.
Fig. 9 is a schematic view of an end structure of the main girder of fig. 8.
The labels in the figure are: 1-bottom plate, 2-top plate, 3-side wall, 4-middle wall, 5-lane gallery, 6-middle gallery, 7-middle cavity form, 71-left form, 72-right form, 8-top spacer, 9-top plate reinforcement cage, 9 a-transverse reinforcement, 9 b-longitudinal reinforcement, 10-side spacer, 11-middle wall reinforcement cage, 11 a-top reinforcement group, 11 b-bottom reinforcement group, 12-hole, 13-bearing surface, 14-form surface, 15-left side bent frame, 16-right side bent frame, 17-supporting beam, 18-transverse telescopic system, 19-movable form, 20-main truss, 21-sliding system, 211-sliding rail, 212-guide wheel, 22-supporting leg, 23-a first arrangement structure, 24-a second arrangement structure, 24 a-a first connecting steel bar group, 24 b-a second connecting steel bar group, 25-a pre-embedded component, 26-a bottom plate steel bar cage, 27-a mechanical connecting rod, 28-a lifting mechanism, 29-a grouting template, 29 a-a left grouting template and 29 b-a right grouting template.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
The embodiment provides a device for controlling a immersed tube middle cavity template to float upwards in the process of pouring immersed tube precast concrete, as shown in fig. 2, the immersed tube middle cavity template anti-floating device comprises a plurality of top cushion blocks 8 installed at the top of a middle cavity template 7, the height of each top cushion block 8 corresponds to the distance from the top of the middle cavity template 7 to a top plate reinforcement cage 9, and the upper portion and the lower portion of each top cushion block 8 are respectively attached to the top of the top plate reinforcement cage 9 and the top of the middle cavity template 7.
The preferred embodiment is: the immersed tube middle cavity template anti-floating device further comprises a plurality of side cushion blocks 10 arranged on the side face of the middle cavity template 7, the thickness of the side cushion blocks 10 corresponds to the distance from the side face of the middle cavity template 7 to the middle wall reinforcement cage 11, and therefore the two sides of the side cushion blocks 10 are respectively attached to the side faces of the middle wall reinforcement cage 11 and the middle cavity template 7.
Further, a plurality of the side spacers 10 are respectively disposed at both sides of the cavity mold 7.
As shown in fig. 3-5, during the concrete pouring process, the reinforcement cage (including the top plate reinforcement cage 9 and the middle wall reinforcement cage 11) may slightly shake due to the impact of the poured concrete, so that the top pad 8 and the side pads 10 may slightly move, and therefore, it is preferable to form holes 12 on the top pad 8 and the side pads 10 to bind the pads on the reinforcement cage for fixing.
In one preferred embodiment, the top pad 8 and the side pads 10 are concrete pads having the same shape and strength as the concrete cover. The immersed tube precast concrete comprises inner layer reinforced concrete and outer layer plain concrete, the plain concrete layer is concrete from the surface of the steel reinforcement cage to the length of the template, the plain concrete layer is usually used as a concrete protective layer, the top plate steel reinforcement cage and the middle wall steel reinforcement cage respectively comprise transverse steel bars 9a and longitudinal steel bars 9b, the top cushion block 8 and the side cushion block 10 are attached to the transverse steel bars 9a or the longitudinal steel bars 9b, and binding wires are adopted to penetrate through the holes 12 to fasten the transverse steel bars 9a and/or the longitudinal steel bars 9 b.
In practical use, the top cushion block 8 and the side cushion block 10 are preferably strip-shaped cushion blocks, and comprise a supporting surface 13 in contact with the side of the reinforcement cage and a template surface 14 in contact with the middle cavity template 7, wherein the template surface 14 is wave-shaped. As shown in FIG. 4, the top block 8 may also be a square block with a length and width approximately equal to each other, because the top block 8 is stressed more, and the square block has the advantage of better stress.
The immersed tube middle cavity template anti-floating device of the embodiment is preferably used in an integrally assembled middle cavity template system, as shown in fig. 6, the middle cavity template system comprises a left template 71 connected to a left side bent frame 15 and a right template 72 connected to a right side bent frame 16, the left template 71 and the right template 72 are respectively arranged at two sides of a middle gallery 6, the left template 71 and the right template are assembled to form a complete middle cavity template 7 with a certain gap through a telescopic supporting beam 17 connected to the left side bent frame 15 and the right side bent frame 16, a transverse telescopic system 18 for controlling the gap between the left template 71 and the right template 72 is installed on the supporting beam 17, the middle cavity template system further comprises a movable template 19 for filling the gap and a main truss 20 positioned between the left side bent frame 15 and the right side bent frame 16, the main truss 20 is used for placing the supporting beam 17, a sliding system 21 for enabling the supporting beam 17 to move along the length direction of the main truss 20 is further arranged on the main truss 20, the main truss 20 is provided with support legs 22 with lifting mechanisms 28 at two ends, the support legs 22 are arranged outside the end parts of the middle gallery 6, the middle cavity formwork system further comprises grouting formworks 29 arranged at the bottoms of the left formwork 71 and the right formwork 72, and the grouting formworks 29 comprise a left grouting formwork 29a and a right grouting formwork 29b which are detachably connected with the left formwork 71 and the right formwork 72 respectively.
The transverse telescopic system 18 comprises telescopic hydraulic oil cylinders installed on the supporting beams 17, a plurality of supporting beams 17 are arranged in the length direction of the main truss 20, the telescopic hydraulic oil cylinders are arranged on each supporting beam 17 in a left-right mode respectively, two ends of each telescopic hydraulic oil cylinder are connected to the bent frames and the supporting beams 17 respectively, specifically, the piston rod ends of the left telescopic hydraulic oil cylinder and the right telescopic hydraulic oil cylinder are hinged to the left bent frame and the right bent frame respectively, and the sleeve ends are hinged to the supporting beams 17.
The sliding system 21 comprises a slide rail 211 and a driving motor for driving the cavity formwork system to slide along the length direction of the main truss 20, the sliding system 21 further comprises a guide wheel 212 arranged on the supporting beam 17, when the concrete pouring is finished and the form removing state is achieved, the cavity formwork 7 is tightly abutted to the middle wall concrete through the transverse telescopic system 18, and the main truss 20 can move along the guide wheel 29 through the driving motor.
Example 2
The embodiment provides an anti-floating system for a immersed tube middle cavity template, which is used for systematically fixing the immersed tube middle cavity template and controlling the immersed tube middle cavity template to float upwards in the concrete pouring process.
As shown in fig. 2, 7, 8 and 9, the anti-floating system comprises a sinking pipe middle cavity formwork anti-floating device in embodiment 1 for fixing the middle cavity formwork 7, a first arrangement structure 23 for increasing the anti-floating force of the middle cavity formwork 7 and a second arrangement structure 24 for increasing the weight of the roof reinforcement cage 9.
As a preferred embodiment, the middle cavity formwork (including the left side bent 15, the right side bent 16, the supporting beam 17 and other related auxiliary structures) is installed on a main truss 20, the two ends of the main truss 20 are respectively provided with a leg 22, an embedded member 25 is installed below the lower bottom of the leg 22, and the first arrangement structure 23 includes a connection structure for connecting the leg 22 and the embedded member 25.
Further, the embedded members 25 are ground anchors made of steel wire ropes, steel pipes, reinforced concrete prefabricated members or logs, the supporting legs 22 are connected with the embedded members 25 in an anchoring mode, the embedded members 25 can also be embedded steel structures, the supporting legs 22 are connected with the embedded steel structures 25 in a welding mode or fastening pieces, embedded base steel plates are adopted in the embodiment, and the supporting legs are connected with the base steel plates through bolts to form a first arrangement structure. And the fixed bottom plate can be connected with the supporting legs firstly and then connected with the embedded component.
The lifting mechanism 28 for lifting the main truss 20 is generally arranged above the supporting leg 22, in order to protect the lifting mechanism 28, a mechanical connecting rod 27 is further arranged between the supporting leg 22 and the main truss 20, the mechanical connecting rod 27 is detachably connected with the supporting leg 22, and after the lifting mechanism 28 lifts the main truss 20 to a proper position, the lifting mechanism is fixedly connected with the mechanical connecting rod 27, so that the force is transferred and stressed through the mechanical connecting rod 27 when the middle cavity formwork is subjected to buoyancy.
The second arrangement structure 24 comprises a first connecting reinforcement group 24a formed by connecting the top plate reinforcement cage 9 and the middle wall reinforcement cage 11 into a whole, and the first connecting reinforcement group 24a is welded with the top plate reinforcement cage 9 and the middle wall reinforcement cage 11 respectively, so that the top plate reinforcement cage 9 and the middle wall reinforcement cage 11 form an integral structure.
The second arrangement structure 24 further comprises a second connecting reinforcement group 24b which connects the bottom plate reinforcement cage 26 and the middle wall reinforcement cage 11 into a whole, the second connecting reinforcement group 24b is respectively welded with the bottom plate reinforcement cage 26 and the middle wall reinforcement cage 11, the bottom plate reinforcement cage 26, the middle wall reinforcement cage 11 and the top plate reinforcement cage 9 are further made to form an integral structure, and the weight of the top plate reinforcement cage 9 is increased.
As a preferred embodiment, the middle wall reinforcement cage 11 includes a top reinforcement set 11a close to the top plate reinforcement cage 9, and further includes a bottom reinforcement set 11b close to the bottom plate reinforcement cage 26, where the top reinforcement set 11a extends to and is welded to the top plate reinforcement cage 9, and the bottom reinforcement set 11b extends to and is welded to the bottom plate reinforcement cage 26, so that the bottom plate reinforcement cage 26, the middle wall reinforcement cage 11, and the top plate reinforcement cage 9 form an integral structure.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides an anti device that floats of immersed tube lumen template which characterized in that, including installing a plurality of top cushion (8) at lumen template (7) top, the height of this top cushion (8) with the distance of lumen template (7) top to roof steel reinforcement cage (9) corresponds, makes the upper portion of top cushion (8) with roof steel reinforcement cage (9) laminating, just the lower part and the laminating of lumen template (7) top of top cushion (8).
2. The immersed tube cavity formwork anti-floating device according to claim 1, further comprising a plurality of side spacers (10) installed on the sides of the cavity formwork (7), wherein the thickness of the plurality of side spacers (10) corresponds to the distance from the sides of the cavity formwork (7) to the middle wall reinforcement cage (11), so that two sides of the side spacers (10) are respectively attached to the sides of the middle wall reinforcement cage (11) and the cavity formwork (7).
3. The anti-floating device of the immersed tube middle cavity template according to claim 2, wherein holes (12) for penetrating and binding tie wires on the transverse steel bars (9 a) and/or the longitudinal steel bars (9 b) are formed in the top cushion block (8) and the side cushion blocks (10).
4. The caisson formwork anti-floating device according to claim 2, characterised in that the top and side blocks (8, 10) are concrete blocks with strength comparable to the concrete cover.
5. The immersed tube middle cavity template anti-floating device according to claim 2, wherein the top cushion block (8) and the side cushion blocks (10) are strip-shaped cushion blocks, and comprise a supporting surface (13) contacted with the side of the reinforcement cage and a template surface (14) contacted with the middle cavity template (7), and the template surface (14) is wave-shaped.
6. The immersed tube middle cavity template anti-floating device according to one of claims 1 to 5, wherein the immersed tube middle cavity template anti-floating device is used in an integrally assembled middle cavity template system, the middle cavity template system comprises a left template (71) connected to a left side bent frame (15) and a right template (72) connected to a right side bent frame (16), the left template (71) and the right template (72) are respectively arranged at two sides of a middle gallery (6), the left template and the right template are assembled through retractable supporting beams (17) connected to the left side bent frame (15) and the right side bent frame (16) to form a middle cavity template with a certain gap, a transverse retractable system (18) for controlling the gap between the left template (71) and the right template (72) is installed on the supporting beams (17), the middle cavity template system further comprises a movable template (19) for filling the gap, and be located main truss (20) between left side framed bent (15) and right side framed bent (16), this main truss (20) are used for placing supporting beam (17), still set up on main truss (20) and be used for making supporting beam (17) are along the slip system (21) that this main truss (20) length direction removed main truss (20) both ends are equipped with landing leg (22) of taking elevating system (28), and this landing leg (22) are arranged in well corridor (6) both ends tip outside, and this well cavity template system is still including installing mud jacking template (29) in left template (71) bottom and right template (72) bottom, and this mud jacking template (29) are including left mud jacking template (29 a) and right mud jacking template (29 b) with left template (71) and right template (72) detachable connection respectively.
7. An immersed tube cavity template anti-floating system, characterized by comprising the use of the immersed tube cavity template anti-floating device as claimed in any one of claims 1-6 for fixing the cavity template (7), and further comprising a first arrangement structure (23) for increasing the anti-floating force of the cavity template (7) itself and a second arrangement structure (24) for increasing the weight of the roof reinforcement cage (9).
8. The immersed tube middle cavity template anti-floating system according to claim 7, wherein the middle cavity template (7) is installed on a main truss (20), the end parts of the two ends of the main truss (20) are respectively provided with a supporting leg (22), an embedded member (25) is installed below the lower bottom of the supporting leg (22), and the first arrangement structure (23) comprises a connection structure of the supporting leg (22) and the embedded member (25).
9. The immersed tube cavity formwork anti-floating system according to claim 7, wherein the second arrangement structure (24) comprises a first connection reinforcement set (24 a) connecting the top plate reinforcement cage (9) and the middle wall reinforcement cage (11) as a whole.
10. The caisson formwork anti-floating system according to claim 9, wherein the second arrangement structure (24) further comprises a second set of connecting rebars (24 b) connecting the bottom rebar cage (26) and the middle wall rebar cage (11) in one piece.
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| CN112681136A (en) * | 2020-12-15 | 2021-04-20 | 中国建筑第八工程局有限公司 | Support structure of hollow pier top template and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112681136A (en) * | 2020-12-15 | 2021-04-20 | 中国建筑第八工程局有限公司 | Support structure of hollow pier top template and construction method thereof |
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