CN219691041U

CN219691041U - Construction support system

Info

Publication number: CN219691041U
Application number: CN202320486659.7U
Authority: CN
Inventors: 马瑞成; 邹杨; 刘威杰; 何东; 苏志伟; 马伟; 高凯; 赵旭博
Original assignee: Third Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
Current assignee: Third Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-09-15
Anticipated expiration: 2033-03-14

Abstract

The utility model discloses a construction support system, which is arranged on a cliff rock wall, wherein the gradient of the cliff rock wall is more than or equal to 79 degrees and less than or equal to 90 degrees, and the construction support system comprises: the cantilever platform is fixed on the cliff wall and is positioned above the first-stage bracket; the second stage bracket part is arranged on the overhanging platform; the slope anchor rod is anchored on the cliff wall and is positioned above the overhanging platform, wherein the other part of the second-stage bracket is arranged on the slope anchor rod. The technical scheme of the utility model can improve the stability of the construction support and ensure the construction safety.

Description

Construction support system

Technical Field

The utility model relates to the technical field of construction brackets, in particular to a construction bracket system.

Background

In order to carry out side slope treatment on dangerous rock of high steep side slope, a construction support is required to be erected, the topography of a cliff is complex, the gradient is steep, the construction support at the existing cliff is erected in a cantilever mode, the cantilever support is fixed on the cliff, the upper construction support is further erected after the cantilever support is outwards inclined and fixed, and because the construction height is large, the gradient of the cliff is steep, and a large danger exists in the construction process. How to improve the stability of the cantilever frame and provide better support for the construction support becomes a problem to be solved urgently.

Disclosure of Invention

The utility model mainly aims to provide a construction support system, which aims to improve the stability of a construction support and ensure the construction safety.

In order to achieve the above object, the present utility model provides a construction support system provided on a cliff wall, wherein the gradient of the cliff wall is 79 degrees or more and 90 degrees or less, the construction support system comprising:

a first stage support;

the overhanging platform is fixed on the cliff wall and is positioned above the first-stage bracket;

the second-stage bracket is partially arranged on the overhanging platform; and

the slope anchor rod is anchored on the cliff wall and is positioned above the overhanging platform, and the other part of the second-stage support is arranged on the slope anchor rod.

In one embodiment, the extending direction of the slope anchor rod is a horizontal direction, a portion of the slope anchor rod anchored to the cliff wall is defined as a fixed section, a portion of the slope anchor rod extending out of the cliff wall is defined as an extending section, the fixed section and the extending section are integrally formed, and the second-stage support is fixedly connected with the extending section.

In one embodiment, one of the slope anchors includes two channels, the backs of the two channels being fixedly spliced.

In one embodiment, the second stage support comprises a plurality of uprights and a plurality of adjustable bases, wherein the adjustable bases are fixed in the wing plates of the channel steel of the extension section at intervals, and one upright is vertically arranged on one adjustable base.

In one embodiment, the center of the position where the extension section supports the adjustable base is defined as a support point, the support point being at a distance of no more than 80mm from the cliff wall.

In one embodiment, the construction support system further comprises a wall connecting member comprising an integrally formed anchoring portion anchored to the cliff wall and an extension portion extending away from a side of the cliff wall and connected to the upright.

In one embodiment, the extension is connected to two adjacent rows of the uprights, wherein the connection point is located below the major coil-fastening node of the uprights and at a distance of no more than 300mm from the major coil-fastening node of the uprights.

In one embodiment, the wall connecting member is a Q235 horizontal steel pipe.

In one embodiment, the wall connecting pieces are a plurality of, and the wall connecting pieces are distributed according to a horizontal interval of 3000mm and a vertical interval of 3000 mm.

In one embodiment, at two ends of the second stage support, the wall connecting pieces are distributed according to a horizontal spacing of 1500mm and a vertical spacing of 1500 mm.

According to the technical scheme, the cantilever Ping Taijia is arranged above the first-stage support, the main body part of the second-stage support is erected on the cantilever platform, and the other parts of the second-stage support are erected on the slope anchor rod. The second-stage support is supported by the slope anchor rod and the overhanging platform together, so that the second-stage support 30 is more stable, and because the support above is not directly erected on the support below but is erected on the overhanging platform, and the overhanging platform is anchored on the cliff wall, the upper-stage adjacent support structure and the lower-stage adjacent support structure are separated, and the stress is relatively independent.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a construction rack system according to the present utility model;

fig. 2 is an enlarged view of the structure at a in fig. 1.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	First stage support	40	Slope anchor rod
20	Overhanging platform	50	Cliff wall
				30	Second stage support	60	Wall connecting piece
31	Upright post

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In order to carry out side slope treatment on dangerous rock of high steep side slope, a construction support is required to be erected, the topography of a cliff is complex, the gradient is steep, the construction support at the existing cliff is erected in a cantilever mode, the cantilever support is fixed on the cliff, the upper construction support is further erected after the cantilever support is outwards inclined and fixed, and because the construction height is large, the gradient of the cliff is steep, and a large danger exists in the construction process.

The utility model provides a construction support system which is arranged on a cliff rock wall 50, wherein the gradient of the cliff rock wall 50 is more than or equal to 79 degrees and less than or equal to 90 degrees.

As shown in fig. 1 and 2, in one embodiment, the construction support system includes:

a first stage support 10;

the overhanging platform 20 is fixed on the cliff wall 50 and is positioned above the first-stage bracket 10;

a second stage support 30, wherein a part of the second stage support 30 is arranged on the overhanging platform 20; and

the slope anchor 40 is anchored to the cliff wall 50 and is located above the overhanging platform 20, wherein another part of the second stage support 30 is disposed on the slope anchor 40.

Specifically, the construction bracket system refers to various brackets erected for a worker to operate and solve vertical and horizontal transportation. Mainly for constructors to get up and down, or surrounding safety nets to enclose and install components at high altitude, etc. In the utility model, the socket-and-spigot type disc buckle type steel pipe scaffold is adopted as a construction support main body, and an operation platform and safety protection are provided for main body engineering construction. This socket joint formula dish knot formula steel pipe scaffold includes specifically that: the constructional parts such as pole setting, horizon bar, diagonal bar, scaffold board, railing, fender sole, knot string type steel ladder, safety net are more used in the building field, and the description is omitted here.

When a construction stand (i.e., scaffold) is erected on a foundation, the construction stand is formed of a plurality of stages of stands because the construction position (cliff wall) is high and steep, and the first stage of stand is directly landed on the foundation and may be called a landing frame. The construction support system comprises a plurality of stages of supports, specifically a first support, a second support, a third support and the like, wherein the specific stages can be determined according to the construction height. The first stage support is arranged on the foundation, then, a overhanging platform is fixed on the cliff wall above the first stage support, and the second stage support is arranged on the overhanging platform. Then, fixing a overhanging platform on the cliff wall above the second-stage support, and erecting a third-stage support on the overhanging platform. That is, except the first stage support (the floor frame) is based on the foundation, other stages of supports are based on the overhanging platform, and the overhanging platform is sleeved with the reinforcing member, so that the overhanging platform is further reinforced, the overhanging platform is prevented from being unstable, and the stability of the upper stage support is affected. In order to further improve the stability of the support at all levels of construction support system, the present disclosure has still set up domatic stock, and the cooperation platform of encorbelmenting supports the superior support jointly to make the superior support more firm, make construction support system more firm, provide safe operation environment for constructor.

In the present disclosure, on the first stage support 10, the cantilever platform 20 is initially built, wherein the cantilever platform 20 is in the form of a steel truss and is fixed on the cliff wall 50, specifically, may be anchored and attached to the cliff wall 50 by grouting cement slurry through a drill hole. The second stage support 30 is erected on the overhanging platform 20, and if a slope of the upward rock wall is found to be slowed down, the slope anchor 40 can be anchored therein, and the slope is slowed down here may be the condition when the slope is changed from 90 degrees to less than 90 degrees. Then, based on the slope anchor 40, a part of the upright 31 of the second stage support 30 is erected on the slope anchor 40. In this embodiment, the overhanging platform 20 is set above the first stage support 10, the main body of the second stage support 30 is set on the overhanging platform 20, and the other parts of the second stage support 30 are set on the slope anchor 40. The second stage support is supported by the slope anchor rod 40 and the overhanging platform 20 together, so that the second stage support 30 is more stable.

In one embodiment, as shown in fig. 1 and 2, the construction support systems are arranged in a hierarchical manner along the vertical direction of the rock wall, the height of a single-stage support can be 24m, and the upper and lower adjacent support structures are separated and stressed relatively independently. The separation of the upper and lower adjacent support structures mainly means that after the first layer of support is erected on the foundation platform, namely, the floor support, the overhanging platform 20 starts to be anchored on the cliff wall 50 above the floor support, and the overhanging platform 20 is used as the basis of the second-stage support, in other words, the second-stage support is erected on the overhanging platform 20. Then above the second stage support, the overhanging platform 20 is anchored on the cliff wall 50, and the overhanging platform 20 is used as the foundation of the third stage support, i.e. the second stage support is erected on the overhanging platform 20, and so on, a construction support system with a proper height is always erected for construction by constructors. Because the brackets positioned above are not directly erected on the brackets positioned below and are erected on the overhanging platform 20 between the two adjacent brackets, the overhanging platform 20 is anchored on the cliff wall 50, and therefore, the separation of the upper and lower adjacent bracket structures and the relative independence of stress are ensured.

As shown in fig. 1 and 2, in one embodiment, the extending direction of the slope anchor 40 is a horizontal direction, a portion of the slope anchor 40 anchored to the cliff wall 50 is defined as a fixed segment, a portion of the slope anchor 40 extending from the cliff wall 50 is defined as an extending segment, the fixed segment and the extending segment are integrally formed, and the second stage support 30 is fixedly connected to the extending segment.

In this embodiment, the slope anchor 40 extends horizontally, the fixed section of the slope anchor 40 being anchored to the cliff wall 50 by a predetermined length, and the extended section being fixed with the upright 31 of the second stage bracket 30. Since the slope of the cliff wall 50 is 79 degrees or more and 90 degrees or less, it is very steep and difficult to directly fix the vertical rod 31, when the slope is slowed down, the slope anchor 40 is anchored to the cliff wall 50 at this point, the slope anchor 40 is used as the foundation of the vertical rod 31, and the vertical rod 31 is fixed to the slope anchor 40. Then, the second stage bracket 30 can be continuously erected under the cooperation of the upright posts 31 and the upright posts 31 erected on the overhanging platform 20.

In one embodiment, one of the ramp anchors 40 includes two channels with the back of the two channels fixedly spliced. Such a slope anchor 40 is robust, low cost, and easy to obtain materials. Specifically, the channel steel can be Q235 steel which accords with hot rolled section steel GB/T706-2016, and No. 8 channel steel.

Further, during actual construction, a notch at one side of the horizontal anchor rod of the double-spliced 8# channel steel can be upwards anchored on the cliff rock wall 50 through drilling and grouting, the diameter of an anchor hole is 125mm, the depth (anchoring length) of the anchor hole is 800mm, and 42.5-level ordinary silicate cement is adopted for grouting the anchor hole. Before the rock wall is drilled and anchored, loose covers such as surface floating soil, vegetation root systems, weathered stripped rock layers and the like are cleaned, until the complete hard rock wall is exposed, and the depth of the anchor holes is calculated from the surface of the complete hard rock wall.

In one embodiment, the second stage support 30 includes a plurality of upright posts 31 and a plurality of adjustable bases, wherein a plurality of adjustable bases are fixed in the wing plates of the channel steel of the extension section at intervals, and one upright post 31 is vertically installed on one adjustable base. In this embodiment, the wing plates of the channel steel can limit the adjustable base and the upright 31. Specifically, in the utility model, the lower part of the upright rod 31 is provided with an adjustable base, the upright rod 31 is connected by socket joint of a sleeve, the horizontal rod and the inclined rod are clamped into a connecting disc by rod ends and joints, and the horizontal rod and the inclined rod are connected by wedge-shaped bolts to form a steel pipe bracket with a structure geometry unchanged system.

In one embodiment, the center defining the position where the extension supports the adjustable base is a support point that is no more than 0.08m from the cliff wall 50.

In this embodiment, the supporting point is not more than 0.08m from the cliff wall 50, and in one embodiment, the supporting point may be 0.08m or 0.06m from the cliff wall 50, so that the slope anchor 40 can be stably fixed to the cliff wall 50, thereby making the second stage bracket 30 installed above more stable.

In one embodiment, a limiting member is disposed at the end of the extension section to limit the adjustable base and the upright 31. And a limiting piece is arranged at the end of the extending section and used for limiting the upright posts 31 and the bases of the upright posts 31, so that the upright posts 31 and the bases of the upright posts 31 are prevented from sliding out of the cliff wall 50 to punch out the end of the horizontal anchor rod and support to fall down. Wherein, the distance of the supporting point to the cliff rock wall 50 is not more than 0.08m, and the limit piece at the end of the extending section and the wing plates at two sides of the channel steel are matched, so that the vertical rod 31 can be effectively prevented from slipping and shaking, and the vertical rod 31 is more stable. Specifically, in one embodiment, the limiting member is a limiting steel plate, the limiting steel plate is welded to the end face of the protruding end, and the welding end socket is plugged at the end of the protruding end. The limiting steel plate is easy to obtain and low in cost, the limiting steel plate is welded on the end face of the extending section, and the welding end socket is plugged at the end of the extending section, so that the upright rod 31 can be well limited.

As shown in fig. 1 and 2, in one embodiment, the construction support system further comprises a wall connecting member 60, the wall connecting member 60 comprising an integrally formed anchoring portion anchored to the cliff wall 50 and an extension portion extending away from a side of the cliff wall 50 and connected to the upright 31. The wall connecting piece 60 is used for fixing the vertical rod 31, further fixing the construction support system, and supporting the second-stage support 30 by matching with the slope anchor rod 40 and the overhanging platform 20, so that the construction support system is more stable.

Specifically, in practical construction, the wall connecting piece 60 can be anchored on the rock wall by adopting a Q235 horizontal steel pipe with the outer diameter of 48.3mm and the thickness of 2.5 mm. In one embodiment, the extension is connected to the uprights 31 of two adjacent rows. Making the connection of the wall links 60 more secure.

Specifically, the wall connecting member 60 and the two rows of support uprights 31 at corresponding positions may be connected by two sets of right-angle fasteners, and the connection points of the extending portions and the adjacent two rows of uprights should be arranged below the plate fastening main node of the uprights 31, and the distance between the extending portions and the plate fastening main node of the uprights 31 is not greater than 0.3m.

In one embodiment, the connection points of the extension parts and the two adjacent rows of the vertical rods should be arranged below the plate buckling main nodes of the vertical rods 31, and the distance between the extension parts and the plate buckling main nodes of the vertical rods 31 can be 0.2m, 0.25m or the like, so that the extension parts are more firmly fixed, the second-stage support is a socket-type plate buckling steel pipe support, the second-stage support further comprises a second-stage support cross rod, the second-stage support cross rod is connected with the vertical rods, the connection positions of the second-stage support cross rod and the vertical rods are defined as plate buckling main nodes, the wall connecting pieces 60 are multiple, and the distribution of the wall connecting pieces 60 on the surface of a rock wall is distributed according to the longitudinal horizontal spacing of 3m of the support, and the vertical spacing of the support is 3m. The longitudinal two ends of the bracket are encrypted and arranged: the horizontal spacing is 1.5m, and the vertical spacing is 1.5m. The wall links 60 are positioned from the first horizontal bar of each stage of the bottom layer of the rack. The setting can make this construction bracket system more firm like this, be difficult for rocking.

In one embodiment, in which the wall-connecting member 60 may be anchored to the cliff wall 50 by drilling a grout, the anchor hole diameter is 90mm, the anchor hole depth (anchoring length) is 800mm, and the anchor hole grouting is of grade 42.5 Portland cement. Before the rock wall is drilled and anchored, loose covers such as surface floating soil, vegetation root systems, weathered stripped rock layers and the like are cleaned, until the complete hard rock wall is exposed, and the depth of the anchor holes is calculated from the surface of the complete hard rock wall. Reasonable value of the depth of the horizontal steel pipe anchor hole of the wall connecting piece 60 is determined through a field drawing test, the drawing test is carried out by referring to technical rules of full framing prepressing of steel pipes (JGJ/T194-2009), and specific processes and parameters are executed according to the reviewed construction scheme special for construction brackets. Technical specifications for rock-soil anchor rods and shotcrete support engineering (GB 50086-2015).

The technical scheme of the utility model is mainly used for constructing scarps with the gradient of rock walls of which the gradient is more than or equal to 79 degrees and less than or equal to 90 degrees, in practical application, the overhanging platform is actually arranged at the position of the scarps at the exit of a Gong beach tunnel of a first-term engineering of a unitary highway from Peng Shui to unitary highway, the height of the scarps reaches 190m, the coverage width is 85.5m, the gradient is close to 90 degrees, the first layer adopts a floor frame, the rest adopts overhanging platform structures, overhanging parts of the structures are more, and the stress is complex. The scarp is locally provided with dangerous rock bodies, is in an understable state, and can be subjected to overall dumping damage under the influence of adverse factors such as heavy rain, vibration and the like, and if the scarp is further developed, new dangerous rock bodies can be formed. To ensure the overall stability of the cliff rock wall, reinforcement and protection of the cliff rock wall is therefore required.

During construction, a bracket is firstly required to be erected so that workers can stand on the scaffold to strengthen and protect the cliff wall. The supports are vertically and hierarchically arranged along the rock wall, the height of the single-stage supports is not more than 24m, the upper and lower adjacent support structures are separated, the stress is relatively independent, the first stage is a floor support, and the second stage adopts a cantilever platform structure. The second stage support is set up on the platform of encorbelmenting, along with the erection of second stage support, if upwards have the rock wall slope to slow down, just can anchor slope stock here, the slope that here slows down can mean, when the slope changes to the condition of being less than 90 degrees from 90 degrees. Then, based on the slope anchor rod, part of the upright rods of the second stage support are erected on the slope anchor rod. The second-stage support is supported by the slope anchor rod and the overhanging platform together, so that the second-stage support is more stable.

The overhanging platform is fixed on the scarp, and the upper bracket is erected on the overhanging platform and separated from the lower bracket structure, so that the stress is relatively independent and safer. The overhanging platform is tightly connected with the cliff wall, so that a stable working environment is provided for constructors. The overhanging platform structure is stable, so that the construction environment is safer and more stable. The upper and lower adjacent support structures are separated and stressed relatively independently, so that the load of the lower support is not increased by the erection of the upper support, and the upper support is safer. And moreover, the lower support can be dismantled in the construction process, so that the construction of the upper support is not influenced. The satisfactory material of the lower bracket is then used to set up the upper bracket. Saving building materials, realizing recycling of materials and reducing cost.

The reinforcement is sleeved on the overhanging platform, so that the overhanging platform is further reinforced, and the overhanging platform is prevented from being unstable, so that the stability of the upper bracket is influenced. In one embodiment, the reinforcement may be a pre-stressed anchor cable and a pre-stressed anchor cable beam, wherein the pre-stressed anchor cable is anchored to the cliff wall, the pre-stressed anchor cable after tensioning is capable of well fixing the pre-stressed anchor cable beam to the cliff wall, the pre-stressed anchor cable is disposed beside the overhanging platform, the pre-stressed anchor cable beam is sleeved outside the overhanging platform for reinforcing the overhanging platform, and the pre-stressed anchor cable is used for fixing the pre-stressed anchor cable beam.

On the one hand, the prestressed anchor cable beam can support and fix the cantilever platform, so that the cantilever platform is prevented from being damaged by collapse of cliff walls in the construction process, and safety of constructors is threatened. On the other hand, the cantilever platform fixed on the cliff wall can also fixedly support the prestressed anchor cable beam. After the construction is completed, the whole overhanging platform is not dismantled, and the overhanging platform is shortened to a preset length, so that the overhanging platform can support the prestressed anchor cable beam in cooperation with the prestressed anchor cable. The prestressed anchor cable beam can protect the cliff and prevent dangerous rock from falling off.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A construction support system, characterized in that the construction support system is provided on a cliff rock wall, wherein the gradient of the cliff rock wall is 79 degrees or more and 90 degrees or less, the construction support system comprising:

a first stage support;

the reinforcement is sleeved on the overhanging platform and used for reinforcing the overhanging platform;

the second-stage bracket is partially arranged on the overhanging platform; and

2. The construction bracket system of claim 1, wherein the extension direction of the slope anchor is horizontal, the portion of the slope anchor that is anchored to the cliff wall is defined as a fixed segment, the portion of the slope anchor that extends out of the cliff wall is defined as an extended segment, the fixed segment is integrally formed with the extended segment, and the second stage bracket is fixedly connected with the extended segment.

3. The construction scaffolding system as claimed in claim 2 wherein one of the ramp anchors comprises two channels, the backs of the two channels being fixedly spliced.

4. A construction equipment support system according to claim 3, wherein the secondary support comprises a plurality of uprights and a plurality of adjustable mounts, a plurality of said adjustable mounts being fixed at spaced intervals within the flanges of the channel section of the extension, one of said uprights being mounted upright on one of said adjustable mounts.

5. The construction support system of claim 4, wherein a center defining a position where the extension supports the adjustable base is a support point, the support point being no more than 80mm from the cliff wall.

6. The construction equipment of claim 5, further comprising a wall-connecting member including an integrally formed anchor portion anchored to the cliff wall and an extension portion extending away from a side of the cliff wall and connected to the upright.

7. The construction support system of claim 6, wherein the extension is connected to two adjacent rows of the uprights, wherein the connection point is located below and no more than 300mm from the main coil nodes of the uprights.

8. The construction support system of claim 6 or 7, wherein the wall-connecting member is a Q235 horizontal steel pipe.

9. The construction support system of claim 8, wherein a plurality of said wall connectors are distributed at a horizontal spacing of 3000mm and a vertical spacing of 3000 mm.

10. The construction support system according to claim 9, wherein the wall links are arranged at a horizontal spacing of 1500mm and a vertical spacing of 1500mm at both ends of the second stage support.