A formwork device for a cantilever structure above a lattice beam high slope

Abstract

The utility model discloses a formwork device of cantilever structure on high slope of lattice beam, including the steel pipe frame of setting on high slope of lattice beam, the inclined pole of steel pipe frame's several is along high slope of lattice beam gradient direction and is inclined to set and is along high slope of lattice beam width interval setting, the bottom of several first vertical rods is set on the plane between the top of high slope of lattice beam and engineering stake, several first vertical rods, several second vertical rods and several third vertical rods are all vertical setting, several first crosspieces, several second crosspieces, several third crosspieces, several fourth crosspieces and several horizontal short bars are all left and right horizontal setting, the anti -slip ability of this application is strengthened, and the lattice beam and the slope foundation are handled by " the combination of planting the steel bar anchoring + concrete platform", cooperate the anchor rod type reinforcing part (steel pipe ground anchor anchors into the slope), make steel pipe frame and the slope form the collaborative force system, solved the difficulty that traditional formwork frame is easy to slide on the slope.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, specifically, it relates to a formwork support device for a cantilever structure above a high slope of a lattice beam. Background Technology

[0002] In slope engineering, formwork support for cantilever structures (such as cantilever beams and slabs) is a major construction challenge. Traditional support systems are prone to problems such as pole slippage and frame instability due to the complex terrain and uneven foundation bearing capacity of slopes. Furthermore, conventional foundation treatment methods cannot balance bearing capacity and positioning accuracy, resulting in high construction safety risks and poor structural quality. In existing technologies, improvements to slope support are mostly focused on strengthening single nodes, lacking a systematic design. For example, some solutions only use steel pipe bracing to enhance stability, but fail to address the issue of coordinated stress between the pole foundation and the slope. Therefore, a formwork support device for cantilevered structures above high slopes using a lattice beam is needed. This device is simple in structure, easy to construct, and can solve the problem of coordinated stress between the pole foundation and the slope. Utility Model Content

[0003] The purpose of this invention is to provide a formwork support device for a lattice beam cantilever structure above a high slope that is simple in structure, easy to construct, and can solve the problem of coordinated stress between the pole foundation and the slope.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A formwork support device for a cantilever structure above a high slope of a lattice beam includes a steel pipe frame set on the high slope of the lattice beam. The steel pipe frame includes a plurality of diagonal braces, a plurality of first uprights, a plurality of second uprights, a plurality of third uprights, a plurality of first horizontal bars, a plurality of second horizontal bars, a plurality of third horizontal bars, a plurality of fourth horizontal bars, and a plurality of horizontal short bars. The plurality of diagonal braces are inclined along the slope direction of the high slope of the lattice beam and are spaced apart along the width of the high slope of the lattice beam. The bottom ends of the plurality of first uprights are set on the plane between the top of the high slope of the lattice beam and the engineering pile. The plurality of first uprights, a plurality of second uprights, and a plurality of third uprights are all set vertically, while the plurality of first horizontal bars, a plurality of second horizontal bars, a plurality of third horizontal bars, a plurality of fourth horizontal bars, and a plurality of horizontal short bars are all set horizontally to the left and right. The tops of several first uprights are supported and connected to the lower surface of the cantilever structure by first support members. Several horizontal short bars are connected to several first uprights by first horizontal steel bars. The left ends of several third horizontal bars are connected to several first uprights by second horizontal steel bars. The bottom ends of several second uprights are inserted into the grid beam or earth slope. The tops of several second uprights are supported and connected to the lower surface of the cantilever structure by second support members. The bottom ends of several third uprights are inserted into the grid beam or earth slope. The tops of several third uprights are suspended and located above the cantilever structure. The right ends of several first horizontal bars are connected to the rightmost third vertical bar, the left ends of several first horizontal bars are connected to the remaining third vertical bars, the right ends of several second horizontal bars are connected to the rightmost third vertical bar, the left ends of several second horizontal bars are connected to the second vertical bar, the right ends of several third horizontal bars are connected to the rightmost third vertical bar, the left ends of several third horizontal bars are connected to the first vertical bar, the right ends of several fourth horizontal bars are connected to the rightmost third vertical bar, and the left ends of several fourth horizontal bars are connected to the leftmost third vertical bar.

[0005] A number of first uprights, a number of second uprights, and a number of third uprights are arranged from left to right, and a number of first horizontal bars, a number of second horizontal bars, a number of third horizontal bars, and a number of fourth horizontal bars are arranged from top to bottom.

[0006] Several reinforced scissor braces are installed on the steel pipe frame.

[0007] The second and third uprights are inserted into the lattice beam at the bottom. The bottom of each upright is provided with a first embedded steel bar. The length of the first embedded steel bar inserted into the lattice beam is not less than 200mm and a concrete platform is provided at the connection. The top of the concrete platform is not less than 100mm above the inclined surface of the lattice beam. The height of the concrete platform is not less than 200mm and the width of the concrete platform is the same as the width of the lattice beam. The second and third uprights are inserted into the earthen slope between the grid beams. The bottom of each upright is equipped with a second embedded steel bar. The length of the second embedded steel bar inserted into the earthen slope is not less than 200mm, and a strip platform is provided at the connection point. The width of the strip platform is not less than 200mm, the bottom surface of the strip platform is horizontal, and a concrete pouring layer is provided on the strip platform.

[0008] Ground anchors are installed between the steel pipe frame and the earthen slope. The ground anchors are anchor-type wall ties, including horizontal anchors and vertical anchors. The vertical anchors are inserted vertically into the slope soil layer and are no less than 350mm in length. The horizontal anchors are connected to several second vertical poles and several second horizontal poles by swivel couplers.

[0009] The first and second uprights are connected to the engineering piles by clamps.

[0010] A dense safety net is installed on the far right side of the steel pipe frame.

[0011] The spacing between several first horizontal bars is the same as the spacing between several fourth horizontal bars, which is greater than the spacing between several second horizontal bars, which is greater than the spacing between several third horizontal bars.

[0012] This application breaks through the limitations of traditional slope formwork "single reinforcement". It designs reinforced concrete platform foundations for two types of foundations: grid beams and soil slopes. Combined with the installation of steel pipe ground anchors to tie the support frame, it solves the problem of slope pole slippage.

[0013] This application enhances anti-slip capability by combining rebar anchoring with a concrete platform to treat the lattice beams and slope foundations. This, along with anchor-type reinforcement (steel pipe ground anchors embedded in the slope), creates a synergistic force-bearing system between the steel pipe frame and the slope, solving the problem of traditional formwork frames being prone to sliding on slopes. Furthermore, this application employs a frame design with a height-to-width ratio ≤1, combined with external perimeter and internal bidirectional scissor bracing, steel pipe ground anchors, and engineering pile clamps for connection, forming a stable system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the formwork support structure on the lattice beam of this utility model.

[0015] Figure 2 yes Figure 1 Enlarged view of section A.

[0016] Figure 3 This is a schematic diagram of the structure of the formwork on the earthen slope in this utility model.

[0017] Figure 4 yes Figure 3 Enlarged view of section B in the middle.

[0018] Figure 5 This is the structural concept of the lattice beam in this utility model.

[0019] Figure 6 This is a schematic diagram of the earthen slope structure in this utility model. Detailed Implementation

[0020] like Figure 1-6 As shown, a formwork support device for a cantilever structure above a high slope of a lattice beam includes a steel pipe frame set on the high slope of the lattice beam. The steel pipe frame includes several diagonal bars 1, several first vertical bars 2, several second vertical bars 3, several third vertical bars 4, several first horizontal bars 5, several second horizontal bars 6, several third horizontal bars 7, several fourth horizontal bars 8, and several horizontal short bars 9. The several diagonal bars 1 are inclined along the slope direction of the high slope of the lattice beam 10 and are spaced apart along the width of the high slope of the lattice beam 10. The bottom ends of the several first vertical bars 2 are set on the plane between the top of the high slope of the lattice beam 10 and the engineering pile 12. The several first vertical bars 2, several second vertical bars 3, and several third vertical bars 4 are all set vertically. The several first horizontal bars 5, several second horizontal bars 6, several third horizontal bars 7, several fourth horizontal bars 8, and several horizontal short bars 9 are all set horizontally to the left and right. The top ends of several first uprights 2 are supported and connected to the lower surface of the cantilever structure 11 by first support members 14. Several horizontal short poles 9 are connected to several first uprights 2 by first horizontal steel bars. The left ends of several third horizontal poles 7 are connected to several first uprights 2 by second horizontal steel bars. The bottom ends of several second uprights 3 are inserted into the grid beam 10 or the earth slope 18. The top ends of several second uprights 3 are supported and connected to the lower surface of the cantilever structure 11 by second support members 21. The bottom ends of several third uprights 4 are inserted into the grid beam 10 or the earth slope 18. The top ends of several third uprights 4 are suspended and located above the cantilever structure 11. The right ends of several first horizontal bars 5 are connected to the rightmost third upright bar 4, the left ends of several first horizontal bars 5 are connected to the remaining third upright bars 4, the right ends of several second horizontal bars 6 are connected to the rightmost third upright bar 4, the left ends of several second horizontal bars 6 are connected to the second upright bar 3, the right ends of several third horizontal bars 7 are connected to the rightmost third upright bar 4, the left ends of several third horizontal bars 7 are connected to the first upright bar 2, the right ends of several fourth horizontal bars 8 are connected to the rightmost third upright bar 4, and the left ends of several fourth horizontal bars 8 are connected to the leftmost third upright bar 4.

[0021] A number of first uprights 2, a number of second uprights 3 and a number of third uprights 4 are arranged from left to right, and a number of first horizontal bars 5, a number of second horizontal bars 6, a number of third horizontal bars 7 and a number of fourth horizontal bars 8 are arranged from top to bottom.

[0022] like Figure 1 As shown, the second upright 3 and the third upright 4 are inserted into the lattice beam at the bottom. The bottom of the first embedded steel bar 15 is provided with a first embedded steel bar 15. The length of the first embedded steel bar 15 inserted into the lattice beam 10 is not less than 200mm and a concrete platform 16 is provided at the connection. The top of the concrete platform 16 is not less than 100mm higher than the inclined surface of the lattice beam 10. The height of the concrete platform 16 is not less than 200mm. The width of the concrete platform 16 is the same as the width of the lattice beam 10. like Figure 3 As shown, the second pole 3 and the third pole 4 are inserted into the earth slope between the grid beams at their bottom ends. The bottom ends of the poles are provided with second embedded steel bars 19. The length of the second embedded steel bars 19 inserted into the earth slope 18 is not less than 200mm and a strip platform 20 is provided at the connection. The width of the strip platform 20 is not less than 200mm. The bottom surface of the strip platform 20 is horizontal and a concrete pouring layer is provided on the strip platform 20.

[0023] Ground anchors 17 are installed between the steel pipe frame and the earthen slope 18. The ground anchors 17 are anchor-type wall ties, including horizontal anchors 171 and vertical anchors 172. The vertical anchors 172 are vertically inserted into the slope soil layer, with a length of not less than 350mm. The horizontal anchors 171 are connected to several second vertical posts 3 and several second horizontal posts 6 via swivel couplers. The first vertical post 2 and the second vertical post 3 are connected to the engineering piles 12 via clamps. A dense safety net is installed on the far right side of the steel pipe frame. Several reinforced scissor braces 13 are installed on the steel pipe frame.

[0024] The spacing between several first horizontal bars 5 is the same as the spacing between several fourth horizontal bars 8, which is greater than the spacing between several second horizontal bars 6, which is greater than the spacing between several third horizontal bars 7.

[0025] During construction, this application calculates the erection parameters of the formwork frame based on the cross-sectional dimensions of the cantilevered beam 11, including the spacing between uprights and the step distance. An upright arrangement diagram is drawn, and positioning lines are laid on the slope according to the diagram. Then, slope treatment is carried out. At the location of the lattice beam corresponding to the upright positioning lines, mechanical drilling is used to install Φ25 steel bars (30mm diameter holes) with an insertion depth ≥200mm, anchored with structural adhesive. Wooden formwork is erected, and a concrete platform is poured, ensuring the top surface of the platform is level with a flatness deviation ≤3mm. Positioning anchors are pre-embedded. For the foundation on the slope, the slope is cleaned and compacted, and a strip platform (≥200mm wide) is chiseled out, with the bottom leveled to a horizontal position with a slope deviation ≤1%. Φ25 steel bars are drilled and anchored into the soil layer ≥200mm. A C25 concrete cushion layer is poured, and Φ48 steel pipe anchors 17 are simultaneously driven in with a embedment depth ≥350mm.

[0026] After the concrete is poured and cured to a strength of ≥70%, the scaffolding is erected. During erection, the scaffolding is constructed in the following order: from bottom to top of the slope, uprights first, then horizontal bars, and from the outer perimeter to the inner perimeter. Uprights are inserted into the pre-embedded reinforcing bars of the foundation platform, and longitudinal and transverse ground bracing is installed, ≤200mm from the top surface of the foundation. Horizontal bars are erected according to the designed step spacing, and scissor bracing 13 is installed simultaneously every 3 steps. Steel pipe ground anchors 17 are connected to the uprights of the scaffolding via horizontal bars, and clamps are used to secure them to the engineering piles / wall columns. After the scaffolding passes acceptance testing, formwork installation, rebar tying, and concrete pouring are carried out sequentially, with real-time monitoring of scaffolding deformation throughout the process.

[0027] Specifically, a certain high slope has a height difference of 8 meters and a slope ratio of 1:1. The slope support is a grid beam 10, which is a support grid beam. The geological conditions are relatively good, consisting of completely weathered rock and soil-like strongly weathered rock layers. Taking the construction of a cantilever beam (section 300mm×600mm) on a certain slope as an example, the frame parameters are as follows: vertical spacing of uprights 900mm, horizontal spacing 900mm, step distance 1500mm; scissor bracing 13 with an angle of 55° to the ground; steel pipe ground anchor 17 with a length of 1m and a driving depth into the stratum ≥350mm. During construction, the parameters are first determined based on the 300mm×600mm beam section dimensions, and a pole arrangement diagram is drawn. The upright positioning lines are then measured and laid out on the slope using a total station. When the upright is placed on the slope support grid beam, a φ25 steel bar is inserted at the corresponding grid beam position 10 at the bottom of the upright. A C25 fine aggregate concrete platform is then poured, with platform dimensions of 200mm × grid beam width. The steel bar is inserted into the slope grid beam 10 to a depth of no less than 200mm, and protrudes 100mm above the top of the platform. The top of the platform is horizontal to ensure that the upright can be vertically supported on the platform surface. This pre-embedded steel bar achieves precise positioning and fixation of the steel pipe column. When the upright is placed on the soil slope 18 between the slope support grid beams, a strip platform 20 with a width of ≥200mm is first chiseled out at the bottom of the upright. The bottom of the strip platform 20 is horizontal and sealed with 100mm thick C25 fine aggregate concrete. To prevent the upright from sliding, φ25 steel bars are pre-embedded at the corresponding upright positions on the platform. The steel bars are anchored into the original slope to a depth of ≥200mm, and the exposed length is controlled to be 100-150mm. The strip platform is stably connected to the slope by pre-embedded steel bars, which also serve as ground anchors to ensure the precise positioning and installation of the steel pipe columns. Simultaneously, 17 φ48 steel pipe column anchors are driven into the soil within 20mm of the slope, with the steel pipe columns embedded ≥350mm into the soil. After 7 days of concrete curing, once the strength reaches C20, pre-embedded steel bars are inserted into the bottom of the columns. Then, columns and crossbars are erected from the bottom of the slope upwards, with the columns inserted into the pre-embedded steel bars on the strip platform at 1.5m intervals. Longitudinal and transverse ground bracing is installed; vertical scissor bracing is installed every 5 spans at a 55° angle to the ground. Steel pipe anchors are driven into the soil every 3 spans and connected to the frame, and the frame is fixed to the engineering piles with clamps at 3m intervals. Finally, the formwork is installed and inspected, and after the steel bars are tied, concrete is poured. During the process, the frame displacement is monitored every 30 minutes to ensure it is ≤10mm.

[0028] This application breaks through the limitations of the traditional slope formwork "single reinforcement". For the two types of foundations, lattice beam 10 and earth slope 18, reinforced concrete platform foundations are designed respectively. Combined with the measures of installing steel pipe ground anchors to tie the support frame, the problem of slope pole slippage is solved.

[0029] This application enhances anti-slip capability by combining rebar anchoring with a concrete platform to treat the lattice beam and slope foundation. This, along with anchor-type reinforcement (steel pipe ground anchors embedded in the slope), creates a synergistic force-bearing system between the steel pipe frame and the slope, solving the problem of traditional formwork frames being prone to sliding on slopes. Furthermore, this application employs a frame design with a height-to-width ratio ≤1, combined with external perimeter and internal bidirectional scissor bracing 13, steel pipe ground anchors 17, and engineering pile clamps for connection, forming a stable system.

[0030] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A formwork support device for a cantilever structure above a high slope of a lattice beam, characterized in that: The system includes a steel pipe frame installed on the high slope of the lattice beam. The steel pipe frame includes several diagonal bars, several first uprights, several second uprights, several third uprights, several first horizontal bars, several second horizontal bars, several third horizontal bars, several fourth horizontal bars, and several horizontal short bars. The diagonal bars are inclined along the slope direction of the high slope of the lattice beam and are spaced apart along the width of the high slope of the lattice beam. The bottom ends of the first uprights are set on the plane between the top of the high slope of the lattice beam and the engineering pile. The first uprights, the second uprights, and the third uprights are all set vertically, while the first horizontal bars, the second horizontal bars, the third horizontal bars, the fourth horizontal bars, and the horizontal short bars are all set horizontally to the left and right. The tops of several first uprights are supported and connected to the lower surface of the cantilever structure by first support members. Several horizontal short bars are connected to several first uprights by first horizontal steel bars. The left ends of several third horizontal bars are connected to several first uprights by second horizontal steel bars. The bottom ends of several second uprights are inserted into the grid beam or earth slope. The tops of several second uprights are supported and connected to the lower surface of the cantilever structure by second support members. The bottom ends of several third uprights are inserted into the grid beam or earth slope. The tops of several third uprights are suspended and located above the cantilever structure. The right ends of several first horizontal bars are connected to the rightmost third vertical bar, the left ends of several first horizontal bars are connected to the remaining third vertical bars, the right ends of several second horizontal bars are connected to the rightmost third vertical bar, the left ends of several second horizontal bars are connected to the second vertical bar, the right ends of several third horizontal bars are connected to the rightmost third vertical bar, the left ends of several third horizontal bars are connected to the first vertical bar, the right ends of several fourth horizontal bars are connected to the rightmost third vertical bar, and the left ends of several fourth horizontal bars are connected to the leftmost third vertical bar.

2. The formwork support device for a cantilever structure above a high slope of a lattice beam according to claim 1, characterized in that: A number of first uprights, a number of second uprights, and a number of third uprights are arranged from left to right, and a number of first horizontal bars, a number of second horizontal bars, a number of third horizontal bars, and a number of fourth horizontal bars are arranged from top to bottom.

3. The formwork support device for a cantilever structure above a high slope of a lattice beam according to claim 1, characterized in that: Several reinforced scissor braces are installed on the steel pipe frame.

4. The formwork support device for a cantilever structure above a high slope of a lattice beam according to claim 1, characterized in that: The second and third uprights are inserted into the lattice beam at the bottom. The bottom of each upright is provided with a first embedded steel bar. The length of the first embedded steel bar inserted into the lattice beam is not less than 200mm and a concrete platform is provided at the connection. The top of the concrete platform is not less than 100mm above the inclined surface of the lattice beam. The height of the concrete platform is not less than 200mm and the width of the concrete platform is the same as the width of the lattice beam. The second and third uprights are inserted into the earthen slope between the grid beams. The bottom of each upright is equipped with a second embedded steel bar. The length of the second embedded steel bar inserted into the earthen slope is not less than 200mm, and a strip platform is provided at the connection point. The width of the strip platform is not less than 200mm, the bottom surface of the strip platform is horizontal, and a concrete pouring layer is provided on the strip platform.

5. The formwork support device for a cantilever structure above a high slope of a lattice beam according to claim 1, characterized in that: Ground anchors are installed between the steel pipe frame and the earthen slope. The ground anchors are anchor-type wall ties, including horizontal anchors and vertical anchors. The vertical anchors are inserted vertically into the slope soil layer and are no less than 350mm in length. The horizontal anchors are connected to several second vertical poles and several second horizontal poles by swivel couplers.

6. The formwork support device for a cantilever structure above a high slope of a lattice beam according to claim 1, characterized in that: The first and second uprights are connected to the engineering piles by clamps.

7. The formwork support device for a cantilever structure above a high slope of a lattice beam according to claim 1, characterized in that: A dense safety net is installed on the far right side of the steel pipe frame.

8. The formwork support device for a cantilever structure above a high slope of a lattice beam according to claim 1, characterized in that: The spacing between several first horizontal bars is the same as the spacing between several fourth horizontal bars, which is greater than the spacing between several second horizontal bars, which is greater than the spacing between several third horizontal bars.

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