CN213979900U - Subway engineering steel truss unilateral supporting side wall formwork system - Google Patents
Subway engineering steel truss unilateral supporting side wall formwork system Download PDFInfo
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- CN213979900U CN213979900U CN202022662485.4U CN202022662485U CN213979900U CN 213979900 U CN213979900 U CN 213979900U CN 202022662485 U CN202022662485 U CN 202022662485U CN 213979900 U CN213979900 U CN 213979900U
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Abstract
The utility model discloses a subway engineering shaped steel truss unilateral supports side wall formwork system mainly includes rigidity right angle shaped steel truss, truss fixed system, pre-buried fixed system, and template subassembly and side braced system join in marriage the dress standard flat mould and connect high template according to the difference of floor height. The single-side section steel right-angle support is positioned on the base and is formed by combining a plurality of section steel supports; the truss connecting system consists of high-strength bolts, steel pipes and I-shaped steel; the pre-buried fixing system is formed by pre-burying a bolt and I-shaped steel to a station middle (bottom) plate; the template assembly and the side supporting system comprise side wall steel templates and a plug wall wood template system, wherein the side wall steel templates are connected through bolts and are transversely assembled in the length direction according to the arrangement of the profile steel triangular support truss, and the plug wall wood template is formed by wood templates, square wood and simple profile steel supports; the side supporting system adopts I-shaped steel as an inclined strut and a straight strut. The construction method is simple and flexible, and has strong applicability and good economical efficiency.
Description
Technical Field
The utility model relates to a construction facility especially relates to a subway engineering shaped steel truss unilateral supports side wall formwork system.
Background
Along with the rapid development of urban rail transit construction, the construction standard of subway stations is continuously improved, and the selection of a side wall formwork system is particularly important in the construction of side walls of the subway stations.
Urban land resources are precious, the distance between the outer wall of many underground projects and a ground red line is short, meanwhile, vertical support is widely adopted along with the development of deep foundation pit support technology, the construction of the outer wall of the underground projects cannot be realized by adopting double-side supporting forms, and a single-side supporting form must be adopted. The traditional single-side formwork erecting process adopts steel pipes to erect a bent frame as a supporting system of a formwork, the process uses large quantity of steel pipes, long erecting period, low formwork erecting height at one time, and is easy to have the defects of upward floating of the formwork, expansion of the formwork, poor flatness of a concrete wall surface, poor verticality and the like, and the construction quality is difficult to ensure. And for a wall formwork with a large height, the construction difficulty is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a subway engineering shaped steel truss unilateral supports side wall formwork system.
The utility model aims at realizing through the following technical scheme:
the utility model discloses a subway engineering section steel truss unilateral support side wall die carrier system, including rigidity right angle section steel truss, truss connecting system, pre-buried fixed system, template subassembly and side braced system, the template subassembly is assembled into standard flat template and connects high template according to the difference of layer height;
the rigid right-angle trapezoidal truss is formed by combining a plurality of steel supports, and the height of the rigid right-angle trapezoidal truss is as follows: h is 800 triangular supports, H is 600 trapezoidal supports, H is 1700 trapezoidal support middle sections, H is 2300 trapezoidal support middle sections, H is 2400 trapezoidal support lower sections, the vertical support, the diagonal brace, the inner diagonal brace and the transverse support rod piece of each support are formed by connecting two No. 10 channel steels back to back, a socket joint type operation platform is arranged at the upper part of the right-angle support, and triangular support longitudinal connecting steel pipes are welded on the inner diagonal brace rod piece;
the truss connecting system consists of high-strength bolts, steel pipes and I-shaped steel, bolt holes are longitudinally preset in the rigid truss, each layer of rigid truss is connected through the high-strength bolts, the brackets are transversely connected through phi 48 steel pipes, and the brackets are welded with the base I-shaped steel;
the embedded fixing system consists of bolts and I-beams embedded in a station middle plate or a station bottom plate, is used for fixing a truss and preventing a support system from deviating, and is embedded in concrete when the middle plate or the station bottom plate is constructed by embedded long screws and I10a I-beams, wherein the embedded length meets the specification requirement;
the template assembly and the side supporting system adopt steel templates and partial wooden templates with the thickness of 20mm, and comprise side wall steel templates, end cap wall wooden templates and I-shaped steel supports.
According to the technical scheme provided by the utility model, the template support system of the side wall steel mould supported by the steel truss on one side provided by the embodiment comprehensively considers the height of each layer of the station, the side wall adopts the template support system of the side wall steel mould supported by the steel truss on one side, the template support engineering is arranged in the underground excavated station, and the influence of wind load on the template support is not required to be considered; the bearing supports are all erected on the medium plate and bottom plate concrete foundation, the concrete foundation is high in overall stability and strength, the problem of uneven settlement of the formwork is solved, the formwork support system is a support system for supporting the side wall steel formwork on one side of the steel truss, and the rigidity and the stability are high; the anchor bolt and I22a I-steel fixing frame system is adopted, the structure is simple, the performance is reliable, and the operation and the use are convenient.
Drawings
FIG. 1 is the embodiment of the utility model provides a subway engineering shaped steel truss unilateral supports side wall die carrier system structure side sketch map.
Fig. 2 is the embodiment of the utility model provides a subway engineering shaped steel truss unilateral supports side wall die carrier system structure elevation sketch map.
The reference numbers in the figures illustrate:
1. a rigid right-angle steel truss; 2. a truss connection system; 3. pre-burying a fixing system; 4. a template assembly and a side support system.
Detailed Description
Embodiments of the present invention will be described in further detail below. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
The utility model discloses a subway engineering shaped steel truss unilateral supports side wall formwork system, the concrete implementation mode of its preferred is:
the steel truss formwork comprises a rigid right-angle steel truss, a truss connecting system, a pre-buried fixing system, a formwork assembly and a side supporting system, wherein the formwork assembly is assembled into a standard flat formwork and a height-connected formwork according to different layer heights;
the rigid right-angle trapezoidal truss is formed by combining a plurality of steel supports, and the height of the rigid right-angle trapezoidal truss is as follows: h is 800 triangular supports, H is 600 trapezoidal supports, H is 1700 trapezoidal support middle sections, H is 2300 trapezoidal support middle sections, H is 2400 trapezoidal support lower sections, the vertical support, the diagonal brace, the inner diagonal brace and the transverse support rod piece of each support are formed by connecting two No. 10 channel steels back to back, a socket joint type operation platform is arranged at the upper part of the right-angle support, and triangular support longitudinal connecting steel pipes are welded on the inner diagonal brace rod piece;
the truss connecting system consists of high-strength bolts, steel pipes and I-shaped steel, bolt holes are longitudinally preset in the rigid truss, each layer of rigid truss is connected through the high-strength bolts, the brackets are transversely connected through phi 48 steel pipes, and the brackets are welded with the base I-shaped steel;
the embedded fixing system consists of bolts and I-beams embedded in a station middle plate or a station bottom plate, is used for fixing a truss and preventing a support system from deviating, and is embedded in concrete when the middle plate or the station bottom plate is constructed by embedded long screws and I10a I-beams, wherein the embedded length meets the specification requirement;
the template assembly and the side supporting system adopt steel templates and partial wooden templates with the thickness of 20mm, and comprise side wall steel templates, end cap wall wooden templates and I-shaped steel supports.
The template assembly adopts a steel template and a wooden template with the thickness of 20mm partially, and comprises a side wall steel template and a plug wall wooden template;
the thickness of the steel templates is 4mm, the size of the rib plates is 5mm x 50mm, the distance between the rib plates is 200mm x 300mm, the size is 0.6 x 1.5m, the steel templates are connected through bolts, the distance between the bolt holes is 150mm, and the steel templates are transversely assembled in the length direction;
the plug wall wood formwork is formed by wood formworks with the thickness of 20mm, square wood and simple section steel supports, the distance between the square wood is not more than 300mm, I16a I-steel vertical supports are adopted behind the square wood, I10a I-steel is adopted to set inclined supports, and the method for manufacturing the corners of the side walls of the shield widening section is the same as that of the plug wall.
The side support system includes:
after the strength of the bottom longitudinal beam reaches 100%, arranging an I22a I-shaped steel support in the horizontal direction with the die carrier, fixing one end of the support on the die carrier, supporting the other end of the support by taking the bottom longitudinal beam as a stress point, and protecting the end part of the support by adopting L140 x 90 x 10mm angle steel;
and an I22a I-shaped steel support is arranged at an elevation angle of 30 degrees in the horizontal direction, one end of the I-shaped steel support is fixed on the die frame, the other end of the I-shaped steel support is supported by taking the bottom longitudinal beam as a stress point, and the end part of the I-shaped steel support is protected by adopting Q235, 310, 180 and 10mm steel plates for finished product protection of the bottom longitudinal beam.
The method for realizing the side wall construction by the subway engineering steel truss unilateral supporting side wall formwork system comprises the following steps:
s1, dividing a flow section:
constructing side walls after the construction of the plate and longitudinal beam concrete structures is completed, and dividing the flow sections according to the length of each section not more than 20 m;
s2, binding bottom plate and bottom longitudinal beam steel bars, pouring concrete and maintaining:
binding side wall reinforcing steel bars, embedding a ground anchor bolt and supporting I-shaped steel, wherein the anchoring of the ground anchor bolt into concrete is not less than 550mm, and the anchoring of the I-shaped steel into the concrete is not less than 300 mm;
pouring concrete on the bottom plate and the middle plate, and pouring a 200mm high-side wall when pouring the plates, so that the next step of construction of a side wall formwork engineering is facilitated;
s3, installing a steel template on the side wall:
the steel templates are transversely placed in the extension direction and connected by bolts;
the side wall and the top joint are connected by adopting a wood template, a next template cannot be placed at the joint, square wood is adopted as a main ridge support at the back of the wood template, and a phi 48 steel pipe is temporarily used for supporting after the template is assembled;
s4, mounting the steel section right-angle support truss:
the interval of the right-angle steel supports is not more than 750mm, the vertical splicing seam of each steel template is supported by the right-angle supports, the right-angle supports are connected by phi 48 steel pipes, the steel pipes are connected with the steel pipe supports by buckles, and after the right-angle supports are installed, the verticality and the flatness of the steel pipes are adjusted by using pre-buried anchor bolts and pre-buried support I-shaped steel. And (4) installing a side wall plug template, wherein the plug template is formed by a wood mold, square wood and a simple section steel support.
S5, pouring side wall concrete:
observing the integral stable state of the die carrier at any time in the pouring process;
after the concrete pouring is finished, the pressure reaches 2.5MPa, the side wall formwork can be dismantled without sticking the side wall concrete to the formwork and falling corners, the side wall formwork is dismantled from top to bottom, and the protection of the concrete surface is noticed in the dismantling process;
and after the template is dismantled, sprinkling water on the surface, and covering the outer side of the template with a plastic film to perform concrete curing.
The utility model discloses a subway engineering shaped steel truss unilateral supports side wall formwork system, the height of each floor of station is taken into comprehensive consideration, the side wall adopts the formwork support system of shaped steel truss unilateral support side wall steel mould, this formwork support engineering sets up in the undercut station, need not consider the influence of wind-load to the formwork support; the bearing supports are all erected on the medium plate and bottom plate concrete foundation, the concrete foundation is high in overall stability and strength, the problem of uneven settlement of the formwork is solved, the formwork support system is a support system for supporting the side wall steel formwork on one side of the steel truss, and the rigidity and the stability are high; the anchor bolt and I22a I-steel fixing frame system is adopted, the structure is simple, the performance is reliable, and the operation and the use are convenient.
The specific embodiment is as follows:
the steel truss formwork mainly comprises a rigid right-angle steel support 1, a truss connecting system 2, a pre-buried fixing system 3, a formwork assembly and a side supporting system 4.
As shown in fig. 1 and 2, the distance between the embedded ground anchor bolts of the embedded fixing system 3 is determined according to the truss connecting system 2, and the distance is 750 mm; and arranging an embedded ground anchor bolt at the starting point and the end point close to a section of wall body respectively, wherein the anchoring depth of the embedded concrete is not less than 550mm, and the specific size is determined according to the actual situation. The anchor bolt and the ground form an angle of 45 degrees, and the on-site embedded line is required to be pulled through, so that the embedded parts are ensured to be on the same straight line. The pre-buried earth anchor bolt takes protective measures against the screw thread before pre-burying, and is wrapped and firmly bound by plastic cloth so as to prevent concrete from adhering on the screw thread to influence the connection nut during construction. Because the pre-buried anchor bolt can not be directly spot-welded with the main reinforcement of the structure, in order to ensure that the buried part does not run or deviate when concrete is poured, an additional reinforcement is required to be added at the corresponding part, the pre-buried anchor bolt is spot-welded on the additional reinforcement, and during spot welding, the effective diameter of the anchor bolt is not damaged.
And (3) starting to install the template assembly and the side supporting system 4 after the acceptance of the side wall steel bars is qualified, polishing and derusting are needed before template installation, the surface is ensured to be smooth, and the template assembly is started after the release agent is coated. When the wall body template is combined, the lower opening of the template is aligned with the edge line of the wall which is previously bounced, then the steel template is installed, and the wall body template is supported by the steel pipe temporarily. The upper part of the template needs to be sealed by a wood template with the thickness of 20mm, the back of the wood template is fixed by square wood, and the space between the square wood is not more than 300 mm. And after the template is installed, the flatness is checked and accepted, and the template is ensured not to have the phenomena of dislocation, unevenness, surface adhesion with sundries and the like. And meanwhile, the side support of the plug wall is installed, and the I-shaped steel is adjusted according to the height on site, so that the stable structure is ensured.
After the templates are checked and accepted, the rigid right-angle steel supports 1 are installed at intervals of 750mm, the vertical splicing joints of each template are supported by right-angle trusses, and the right-angle supports are tightly propped against the back ribs of the templates. And (3) connecting five to six right-angle supports in the straight wall section by using phi 48 steel pipes after each five to six right-angle supports are installed, and connecting the steel pipes with the steel pipe supports by using buckles. And after the right-angle support is installed, adjusting the verticality and the flatness by using the embedded bolt and the embedded support I-steel. And finally, fastening and checking the primary embedded anchoring system to ensure that the lower opening of the template cannot leak slurry when concrete is poured.
Referring to fig. 1-2, a construction process of a formwork support system for supporting a side wall steel mold at one side of a section steel truss is as follows:
s1, dividing a flow section: and constructing the side wall after the construction of the plate and longitudinal beam concrete structure is finished, wherein the flow sections are divided according to the length of not more than 20 m.
S2, binding bottom plate and bottom longitudinal beam steel bars, pouring concrete and maintaining: and (3) binding the side wall reinforcing steel bars, embedding a ground anchor bolt and supporting I-shaped steel, wherein the anchoring concrete of the ground anchor bolt is not less than 550mm, and the anchoring concrete of the I-shaped steel is not less than 300 mm. Pouring concrete on the bottom plate (middle plate), and pouring a 200mm high-side wall when pouring the plate, so that the next step of construction of the side wall formwork engineering is facilitated
S3, installing a steel template on the side wall: the steel form is transversely placed along the length direction and is connected by bolts. The side wall and the top are connected through a wood template, a next template cannot be placed at the joint of the side wall and the top, square wood is used as a main ridge support at the back of the wood template, and a phi 48 steel pipe is used for supporting the template temporarily after the template is assembled.
S4, installing the section steel supporting truss: the triangular support interval is not more than 750mm, guarantees that every department steel form vertical piece department all has the support to support, adopts phi 48 steel pipe to connect between the support, and the steel pipe adopts the buckle to be connected with the steel pipe support, and the ground anchor bolt and support I-steel carry out the straightness that hangs down and the roughness adjustment after the triangular support installation is accomplished. And (4) installing a side wall plug template, wherein the plug template is formed by a wood mold, square wood and a simple section steel support.
S5, pouring side wall concrete: and observing the integral stable state of the die carrier at any time in the pouring process. And after the concrete pouring is finished, the pressure reaches 2.5MPa, the side wall formwork can be dismantled without sticking the side wall concrete to the formwork and falling corners, the side wall formwork is dismantled from top to bottom, and the protection of the concrete surface is noticed in the dismantling process. And after the template is dismantled, sprinkling water on the surface, and covering the outer side of the template with a plastic film to perform concrete curing.
In the profile steel truss unilateral supporting side wall formwork system, the bearing support is erected on the basis of the medium plate and the bottom plate concrete, the formwork support system is a support system of a profile steel truss unilateral supporting side wall steel mould, and the rigidity and the stability are high; and the technical requirements of construction safety are met through stability checking calculation. The construction method is simple and flexible, and has strong applicability and good economical efficiency.
The above description is only for the preferred embodiment of the present invention, but the protection 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 all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. A single-side supporting side wall formwork system of a subway engineering steel truss is characterized by comprising a rigid right-angle steel truss, a truss connecting system, a pre-embedded fixing system, a formwork assembly and a side supporting system, wherein the formwork assembly is assembled into a standard flat formwork and a height connecting formwork according to different floor heights;
the rigid right-angle trapezoidal truss is formed by combining a plurality of steel supports, and the height of the rigid right-angle trapezoidal truss is as follows: h is 800 triangular supports, H is 600 trapezoidal supports, H is 1700 trapezoidal support middle sections, H is 2300 trapezoidal support middle sections, H is 2400 trapezoidal support lower sections, the vertical support, the diagonal brace, the inner diagonal brace and the transverse support rod piece of each support are formed by connecting two No. 10 channel steels back to back, a socket joint type operation platform is arranged at the upper part of the right-angle support, and triangular support longitudinal connecting steel pipes are welded on the inner diagonal brace rod piece;
the truss connecting system consists of high-strength bolts, steel pipes and I-shaped steel, bolt holes are longitudinally preset in the rigid truss, each layer of rigid truss is connected through the high-strength bolts, the brackets are transversely connected through phi 48 steel pipes, and the brackets are welded with the base I-shaped steel;
the embedded fixing system consists of bolts and I-beams embedded in a station middle plate or a station bottom plate, is used for fixing a truss and preventing a support system from deviating, and is embedded in concrete when the middle plate or the station bottom plate is constructed by embedded long screws and I10a I-beams, wherein the embedded length meets the specification requirement;
the template assembly and the side supporting system adopt steel templates and partial wooden templates with the thickness of 20mm, and comprise side wall steel templates, end cap wall wooden templates and I-shaped steel supports.
2. The subway engineering steel truss unilateral supporting side wall formwork system according to claim 1, wherein the formwork component adopts a steel formwork and a part of 20mm thick wood formwork, including a side wall steel formwork and a bulkhead wall wood formwork;
the thickness of the steel templates is 4mm, the size of the rib plates is 5mm x 50mm, the distance between the rib plates is 200mm x 300mm, the size is 0.6 x 1.5m, the steel templates are connected through bolts, the distance between the bolt holes is 150mm, and the steel templates are transversely assembled in the length direction;
the plug wall wood formwork is formed by wood formworks with the thickness of 20mm, square wood and simple section steel supports, the distance between the square wood is not more than 300mm, I16a I-steel vertical supports are adopted behind the square wood, I10a I-steel is adopted to set inclined supports, and the method for manufacturing the corners of the side walls of the shield widening section is the same as that of the plug wall.
3. The subway section steel truss unilateral supporting sidewall formwork system according to claim 2, wherein the lateral supporting system comprises:
after the strength of the bottom longitudinal beam reaches 100%, arranging an I22a I-shaped steel support in the horizontal direction with the die carrier, fixing one end of the support on the die carrier, supporting the other end of the support by taking the bottom longitudinal beam as a stress point, and protecting the end part of the support by adopting L140 x 90 x 10mm angle steel;
and an I22a I-shaped steel support is arranged at an elevation angle of 30 degrees in the horizontal direction, one end of the I-shaped steel support is fixed on the die frame, the other end of the I-shaped steel support is supported by taking the bottom longitudinal beam as a stress point, and the end part of the I-shaped steel support is protected by adopting Q235, 310, 180 and 10mm steel plates for finished product protection of the bottom longitudinal beam.
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| CN202022662485.4U CN213979900U (en) | 2020-11-17 | 2020-11-17 | Subway engineering steel truss unilateral supporting side wall formwork system |
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| CN202022662485.4U CN213979900U (en) | 2020-11-17 | 2020-11-17 | Subway engineering steel truss unilateral supporting side wall formwork system |
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