Construction support system and its erection method

Abstract

The present invention discloses a construction support system and a method for erecting the same, which are used for constructing a steep cliff, wherein the slope of the steep cliff is greater than or equal to 79 degrees and less than or equal to 90 degrees, and the construction support system comprises: a foundation platform, a first-level support, a cantilever platform, a second-level support, and a slope anchor rod, wherein the foundation platform is arranged at the foot of the slope of the steep cliff, the foundation platform comprises a plurality of steps, the plurality of steps are fixedly connected in sequence along a first direction and the height increases progressively; the first-level support is erected on the plurality of steps of the foundation platform; the cantilever platform is anchored on the steep cliff rock wall and is located above the first-level support; the second-level support is partially arranged on the cantilever platform; and the slope anchor rod is anchored on the steep cliff rock wall and is located above the cantilever platform, wherein another part of the second-level support is arranged on the slope anchor rod. The present invention can be erected on a steep cliff rock wall with a height exceeding 100 meters, has a stable structure, and provides a safe working environment for construction personnel.

Description

Technical Field

[0001] The present invention relates to the technical field of construction support, and in particular to a construction support system and a method for erecting the same. Background Art

[0002] Before construction on a steep cliff, such as opening a tunnel, plank road, or blasting part of the mountain, vibrations will be generated, which can easily cause the rock mass on the steep cliff to fall off. The steep cliff needs to be managed and reinforced to prevent the dangerous rock mass on the steep cliff from rolling down and ensure construction safety. When managing the steep cliff, scaffolding needs to be set up. Workers stand on the scaffolding to reinforce the dangerous rock mass on the steep cliff. However, traditional scaffolding cannot be used in the complex environment of the steep cliff. It is difficult to set up on the steep cliff with a height of more than 100 meters. It is not stable enough, which can easily bring danger to the workers. Summary of the invention

[0003] The main purpose of the present invention is to provide a construction support system that can be set up on a steep cliff with a height of more than 100 meters, has a stable structure, and provides a safe working environment for construction workers.

[0004] To achieve the above object, the present invention proposes a construction support system, which is used for construction on a steep cliff, wherein the slope of the steep cliff is greater than or equal to 79 degrees and less than or equal to 90 degrees, and the construction support system comprises:

[0005] A foundation platform, the foundation platform is arranged at the foot of the steep cliff, the foundation platform comprises a plurality of steps, the plurality of steps are fixedly connected in sequence along a first direction and have increasing heights;

[0006] A first-level support, wherein the first-level support is erected on multiple steps of the foundation platform;

[0007] A cantilever platform, which is anchored on the steep cliff and located above the first-level support;

[0008] A second-stage bracket, wherein the second-stage bracket is partially disposed on the cantilever platform; and

[0009] A slope anchor rod is anchored to the steep cliff rock wall and is located above the cantilever platform, wherein another part of the second-level bracket is arranged on the slope anchor rod.

[0010] In one embodiment, the cantilever platform comprises:

[0011] A plurality of cantilever frames are provided, all of which are in the form of steel trusses, and are arranged and connected transversely along the mountain body of the steep cliff. Each of the cantilever frames is anchored on the cliff rock wall and extends in a horizontal direction away from the side of the steep cliff rock wall.

[0012] In one embodiment, the cantilever platform comprises:

[0013] A first channel steel tie rod, the notch of which is upwardly fixed to the top surfaces of the plurality of cantilever frames, and the second-level bracket portion is arranged on the first channel steel tie rod.

[0014] In one embodiment, the construction support system also includes a plurality of prestressed anchor cables, which are fixed at intervals on the steep cliff rock wall. The plurality of prestressed anchor cables are all located above the first-level support and next to the cantilever platform to reinforce the steep cliff rock wall next to the cantilever platform.

[0015] In one embodiment, the extension direction of the slope anchor is horizontal, and the part of the slope anchor anchored to the steep cliff rock wall is defined as the fixed section, and the part of the slope anchor extending out of the steep cliff rock wall is defined as the extending section. The fixed section and the extending section are integrally formed, the second-level bracket is fixedly connected to the extending section, and the other part of the second-level bracket is arranged on the extending section.

[0016] In one embodiment, the second-level support includes a vertical pole and a horizontal pole, wherein the vertical pole is fixedly connected to the horizontal pole, and an adjustable base is installed at the lower part of the vertical pole, and the adjustable base is fixed to the extended section of the slope anchor rod.

[0017] In one embodiment, the first-stage supports and the second-stage supports are staggered by 0.3 m.

[0018] To achieve the above object, the present invention further provides a method for erecting a construction support system, wherein the second-level support comprises a plurality of uprights and a plurality of adjustable bases, the plurality of adjustable bases are fixed at intervals in the extension section, one upright is uprightly mounted on one adjustable base, and the method for erecting a construction support system is used to erect the above-mentioned construction support system, comprising:

[0019] Build the foundation platform;

[0020] Building a first-level support on the foundation platform;

[0021] Anchoring the cantilever platform at a preset position on the steep cliff rock wall above the first-level support;

[0022] dismantling the first-level support;

[0023] Setting up part of the second-level support on the cantilever platform;

[0024] Determine whether the slope of the steep cliff is less than 90 degrees;

[0025] If so, anchor the slope anchor horizontally to the cliff rock wall;

[0026] Another part of the second-level bracket is fixed to the slope anchor rod, and the second-level bracket fixed on the slope anchor rod is matched and connected with the second-level bracket erected on the cantilever platform.

[0027] In one embodiment, the step of building the foundation platform specifically includes:

[0028] Leveling and compacting the foot of the steep cliff;

[0029] Pour cement mortar into the preset position of the slope foot to seal the surface gaps

[0030] A concrete cushion layer of a preset thickness is poured at the foot of the steep cliff to obtain the foundation platform.

[0031] In one embodiment, in the step of pouring a concrete cushion layer of a preset thickness at the foot of the steep cliff to obtain the foundation platform, the foundation platform includes a first step, a second step, a third step and a fourth step of different heights, wherein the first step has the largest extension length in the first direction relative to the second step, the third step and the fourth step.

[0032] In the technical solution of the present invention, the foundation platform includes multiple steps, which can adapt to the complex environment at the foot of the steep cliff and provide stable support for the upper bracket. The cantilever bracket is anchored on the steep cliff, and the cantilever bracket is closely connected to the steep cliff rock wall, providing a stable working environment for construction personnel. The cantilever bracket has a stable structure, making the construction environment safer and more stable. The second-level bracket is erected on the cantilever frame, separated from the first-level bracket structure, and relatively independent of the force. The first-level bracket and the second-level bracket are structurally separated and relatively independent of the force, so that the erection of the second-level bracket will not increase the burden of the second-level bracket, which is safer. Moreover, during the construction process, the first-level bracket can be dismantled without affecting the erection of the upper bracket. Afterwards, the materials that meet the requirements of the first-level bracket are used to erect the upper bracket. Building materials are saved, materials are recycled, and costs are reduced. The second-level bracket is further supported by the slope pole foundation anchored on the steep cliff rock wall, so that the construction bracket can be better and more stably fixed on the steep cliff rock wall, providing workers with a stable construction environment and ensuring construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1 It is a structural schematic diagram of an embodiment of a construction support system of the present invention;

[0035] Figure 2 for Figure 1 A structural diagram of the construction support system from another angle;

[0036] Figure 3 for Figure 1 Structural diagram of the middle cantilever platform;

[0037] Figure 4 The present invention is a flow chart of a method for erecting a construction support system.

[0038] Description of Figure Numbers:

[0039] Label name Label name 10 Cliff 30 Slope anchor 20 Foundation platform 40 First level bracket 21 First step 50 Cantilever platform 22 Second step 51 First channel tie rod 23 The third step 70 Second level bracket 24 The fourth step

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] Before construction on a steep cliff, such as opening a tunnel, plank road, or blasting part of the mountain, vibrations will be generated, which can easily cause the rock mass on the steep cliff to fall off. The steep cliff needs to be managed and reinforced to prevent the dangerous rock mass on the steep cliff from rolling down and ensure construction safety. When managing the steep cliff, scaffolding needs to be set up. Workers stand on the scaffolding to reinforce the dangerous rock mass on the steep cliff. However, traditional scaffolding cannot be used in the complex environment of the steep cliff. It is difficult to set up on the steep cliff with a height of more than 100 meters. It is not stable enough, which can easily bring danger to the workers.

[0045] To address the above problems, the present invention proposes a construction support system for constructing a steep cliff 10, wherein the slope of the steep cliff 10 is greater than or equal to 79 degrees and less than or equal to 90 degrees.

[0046] like Figure 1-Figure 3 As shown, in one embodiment, the construction support system includes:

[0047] A foundation platform 20, the foundation platform 20 is arranged at the foot of the steep cliff 10, the foundation platform 20 comprises a plurality of steps, the plurality of steps are fixedly connected in sequence along a first direction and have increasing heights;

[0048] A first-stage bracket 40, wherein the first-stage bracket 40 is erected on multiple steps of the foundation platform 20;

[0049] A cantilever platform 50, wherein the cantilever platform 50 is anchored on the rock wall of the steep cliff 10 and is located above the first-level support 40;

[0050] A second-stage bracket 70, wherein the second-stage bracket 70 is partially disposed on the cantilever platform 50; and

[0051] The slope anchor rod 30 is anchored to the rock wall of the steep cliff 10 and is located above the cantilever platform 50 , wherein another part of the second-level bracket 70 is disposed on the slope anchor rod 30 .

[0052] In this embodiment, the foundation platform 20 includes multiple steps, which can adapt to the complex environment at the foot of the steep cliff 10 and provide stable support for the upper bracket. The cantilever platform 50 is anchored on the steep cliff 10, and the cantilever platform 50 is closely connected to the rock wall of the steep cliff 10, providing a stable working environment for construction personnel. The cantilever platform 50 has a stable structure, making the construction environment safer and more stable. The second-level bracket 70 is erected on the cantilever platform 50, separated from the first-level bracket 40 structure, and relatively independent of force. The first-level bracket 40 and the second-level bracket 70 are separated in structure and relatively independent of force, so that the erection of the second-level bracket 70 will not increase the burden of the second-level bracket 70, and is safer. Moreover, during the construction process, the first-level bracket 40 can be dismantled without affecting the erection of the upper bracket. Afterwards, the materials that meet the requirements of the first-level bracket 40 are used to erect the upper bracket, saving the resources consumed by transporting building materials from the outside. Building materials are saved, the recycling of materials is realized, the cost is reduced, and the construction efficiency is improved. The slope anchor rods 30 anchored on the rock wall of the steep cliff 10 cooperate with the cantilever platform to further support the second-level support 70, so that the construction support system can be better and more stably fixed on the rock wall of the steep cliff 10, providing workers with a stable construction environment and ensuring construction safety.

[0053] Specifically, when setting up a construction support on the foundation, since the construction location (steep cliff rock wall) is high and steep, the construction support system involved in the present disclosure includes a multi-level support, which may specifically include a first support, a second-level support, a third-level support..., an nth-level support, etc., wherein the specific number of levels can be determined according to the construction height. Among them, the first-level support falls directly on the foundation platform, and can also be called a landing stand, because the first-level support is directly set on the foundation platform. Afterwards, a cantilever platform is fixed on the steep cliff rock wall above the first-level support, and a second-level support is set on the cantilever platform. In order to ensure the stability of the second-level support, the present disclosure also anchors the slope anchor rod on the steep cliff rock wall, and uses the slope anchor rod to cooperate with the cantilever platform to jointly support the second-level support, thereby making the second-level support more stable, making the construction support system more stable, and providing a safe working environment for construction personnel.

[0054] After that, the cantilever platform is fixed on the steep cliff above the second-level support, and the third-level support is set up on the cantilever platform. New slope anchor rods are set up above the cantilever platform to cooperate with the cantilever platform to support the third-level support, and so on. Except for the first-level support (ground support) which is based on the foundation, all other levels of support are based on the cantilever platform. Slope anchor rods can be added above the cantilever platform fixed to the steep cliff above each level of support to cooperate with the corresponding cantilever platform to support the upper level support.

[0055] In the present disclosure, the foundation platform, the slope anchor rods and the cantilever platform jointly support the construction support system, thereby improving the stability of the various levels of the construction support system, making the construction support system more stable, and providing a safe working environment for construction personnel. The present disclosure provides examples of the first-level support, the second-level support, and the cantilever platform, slope anchor rods and other structures involved in the first-level support and the second-level support. The cantilever platform, slope anchor rods and other structures involved in the n-th level support and the like can refer to the cantilever platform, slope anchor rods and other structures involved in the first-level support and the second-level support.

[0056] Furthermore, in one embodiment, the cantilever platform 50 includes:

[0057] Multiple cantilever frames are all in the form of steel trusses. Multiple cantilever frames are arranged and connected horizontally along the mountain body of the steep cliff 10. Each cantilever frame is anchored on the rock wall of the steep cliff 10 and extends in a horizontal direction away from the rock wall of the steep cliff 10.

[0058] In this embodiment, a plurality of cantilever frames are arranged and connected transversely along the mountain body of the steep cliff 10 to form a cantilever platform 50 , which is convenient for assembly and disassembly and can be better installed according to the specific conditions of the mountain body of the steep cliff 10 .

[0059] In one embodiment, the plurality of cantilever frames are all in the form of steel trusses. Specifically, the cantilever frames are formed by connecting rods to each other at both ends with hinges. The truss is a plane or space structure generally having triangular units composed of straight rods, and the truss rods mainly bear axial tension or pressure. In this embodiment, the cantilever frame in the form of a steel truss can make full use of the strength of the material, save materials, reduce deadweight and increase rigidity.

[0060] like Figure 3 As shown, in one embodiment, the cantilever platform 50 includes: a first channel steel tie rod 51, the notch of the first channel steel tie rod 51 is fixed upward to the top surface of the plurality of cantilever frames, and the second-level bracket 70 is partially installed on the first channel steel tie rod 51.

[0061] In this embodiment, the first channel steel tie rod 51 is used to connect multiple cantilever frames and serve as a foundation for further construction of the construction support. The first channel steel tie rod 51 can also be vertically arranged with the top surfaces of the multiple cantilever frames to connect the multiple cantilever frames side by side to provide a stable working platform for construction personnel. In one embodiment, the first channel steel tie rod 51 is connected to the top surfaces of the multiple cantilever frames by using corner welds, so that the first tie rod channel steel cantilever frame can be firmly fixed.

[0062] In one embodiment, the construction support system further includes a plurality of prestressed anchor cables (not shown in the figure), which are fixed at intervals on the rock wall of the steep cliff 10, and are all located above the first-level support 40 and beside the cantilever platform 50, so as to reinforce the rock wall of the steep cliff 10 near the cantilever platform 50. This prevents the rock wall of the steep cliff 10 from moving and sliding during the construction process, thereby affecting the safety of the construction workers.

[0063] like Figure 1 As shown, in one embodiment, the extension direction of the slope anchor 30 is horizontal, and the portion of the slope anchor 30 anchored to the rock wall of the steep cliff 10 is defined as a fixed section, and the portion of the slope anchor 30 extending out of the rock wall of the steep cliff 10 is defined as an extended section. The fixed section and the extended section are integrally formed, and the second-level bracket 70 is fixedly connected to the extended section, and another portion of the second-level bracket 70 is arranged on the extended section.

[0064] In this embodiment, the slope anchor 30 extends in the horizontal direction, the fixed section of the slope anchor 30 is anchored to a preset length on the rock wall of the steep cliff 10, and the vertical pole of the second-level bracket 70 is fixed on the extended section. Since the slope of the rock wall of the steep cliff 10 is greater than or equal to 79 degrees and less than or equal to 90 degrees, it is very steep and difficult to directly fix the vertical pole. Therefore, when the slope slows down, the slope anchor 30 is anchored on the rock wall of the steep cliff 10 at that location, and the slope anchor 30 is used as the basis of the vertical pole, and the vertical pole is fixed to the slope anchor 30. After that, the second-level bracket 70 can be continuously erected with the cooperation of the vertical pole and the vertical pole erected on the cantilever platform 50.

[0065] In one embodiment, the slope anchor 30 comprises two channel steels, and the backs of the two channel steels are fixedly spliced. Such a slope anchor 3040 is strong and durable, low in cost, and the material is easy to obtain. Specifically, the channel steel can be Q235 steel or 8# channel steel that complies with "Hot-rolled Steel" "GB / T 706-2016".

[0066] In one embodiment, the notch on one side of the double-jointed 8# channel steel horizontal anchor rod is upwardly bored and poured with cement slurry to anchor it on the steep cliff 10 rock wall. The anchor hole diameter is 125mm, the anchor hole depth (anchoring length) is 800mm, and the anchor hole grouting uses 42.5 grade ordinary Portland cement. Before drilling holes on the rock wall for anchoring, loose covering materials such as surface floating soil, vegetation roots, weathered and stripped rock layers should be cleaned up until the complete hard rock wall is exposed. The anchor hole depth should be calculated from the surface of the complete hard rock wall.

[0067] In one embodiment, the second-level support includes a vertical pole and a horizontal pole, wherein the vertical pole is fixedly connected to the horizontal pole, and an adjustable base is installed at the lower part of the vertical pole, and the adjustable base is fixed to the extended section of the slope anchor rod.

[0068] In this embodiment, when the slope anchor 30 is a channel steel, the wing plate of the channel steel can limit the adjustable base and the vertical pole. Specifically, in this application, an adjustable base is installed at the bottom of the vertical pole to facilitate construction personnel to adjust the height. The vertical pole adopts a sleeve socket connection, and the horizontal rod and the inclined rod adopt a rod end and a joint to be inserted into the connection plate and connected with a wedge-shaped pin to form a steel pipe bracket with a structural geometry unchanged system.

[0069] In one embodiment, the first-stage bracket 40 and the second-stage bracket are staggered by 0.3 m.

[0070] In order to avoid the overlap of the vertical plane position of the cantilever platform 50 of the upper-level support and the vertical pole of the adjacent lower-level support, the span arrangement of the adjacent upper and lower-level supports should be staggered 0.3m alternately to the left and right in the longitudinal direction.

[0071] like Figure 4 As shown, in one embodiment, the present invention further provides a method for erecting a construction support system, which is used to erect the construction support system in any of the above embodiments, comprising:

[0072] Build foundation platform 20;

[0073] Building a first-level support 40 on the foundation platform 20;

[0074] Anchoring a cantilever platform 50 at a preset position on the rock wall of the steep cliff 10 above the first-stage support 40;

[0075] Removing the first-stage bracket 40;

[0076] Part of the second-level bracket 70 is set up on the cantilever platform 50;

[0077] Determine whether the slope of the cliff 10 rock wall is less than 90 degrees;

[0078] If yes, the slope anchor rod 30 is horizontally anchored to the rock wall of the steep cliff 10;

[0079] Another part of the second-level bracket is fixed to the slope anchor rod, and the second-level bracket fixed on the slope anchor rod is matched and connected with the second-level bracket erected on the cantilever platform.

[0080] In this embodiment, the second-level bracket 70 is erected on the cantilever frame, and is separated from the first-level bracket 40 structure and is relatively independent in force. The first-level bracket 40 and the second-level bracket 70 are separated in structure and are relatively independent in force, so that the erection of the second-level bracket 70 will not increase the burden of the second-level bracket 70, and is safer. Moreover, during the construction process, the first-level bracket 40 can be dismantled without affecting the erection of the upper bracket. Afterwards, the materials that meet the requirements of the first-level bracket 40 are used to erect the upper bracket. Building materials are saved, materials are recycled, and costs are reduced. The second-level bracket 70 is further supported by the slope pole foundation anchored on the rock wall of the steep cliff 10, so that the construction bracket can be better and more stably fixed on the rock wall of the steep cliff 10, providing a stable construction environment for workers and ensuring construction safety. In this embodiment, when the slope of the rock wall of the steep cliff 10 changes to less than 90 degrees, it means that the slope of the rock wall of the steep cliff 10 slows down. At this time, in order to make the construction support system more stable, the slope anchor rod 30 is anchored on the rock wall of the steep cliff 10 at this location, and the slope anchor rod 30 is used as one of the foundations of the second-level support. Another part of the second-level support is fixed on the slope anchor rod, and the second-level support fixed on the slope anchor rod is connected with the second-level support set on the cantilever platform. This allows the second-level support to be better supported.

[0081] In one embodiment, the steps of constructing the foundation platform 20 specifically include:

[0082] Leveling and compacting the foot of the steep cliff 10;

[0083] Cement mortar is poured into a preset position of the slope foot to seal surface gaps; a concrete cushion layer of a preset thickness is poured into the slope foot of the steep cliff 10 to obtain the foundation platform 20 .

[0084] In this embodiment, since there are often collapsed accumulation bodies at the foot of the slope, in order to make the ground frame more stable, when building the foundation platform 20, the preset position of the foot of the slope should be leveled and compacted, and cement mortar should be poured into the preset position of the foot of the slope to seal the surface gaps. The surface gaps at the preset position of the foot of the slope are sealed to make the foundation platform 20 more stable, less prone to corrosion, and longer in service life. Then, a concrete cushion layer of a preset thickness is poured at the preset position of the foot of the slope. In this way, the foundation platform 20 can be flat and firm. Specifically, after the foundation platform 20 is excavated, it is difficult to ensure the flatness of the foundation surface due to the large particle size of the original collapsed accumulation body blocks and stones, and it should be leveled and compacted. The specific plan can be: when excavating the foundation platform 20, over-excavate 300mm downward appropriately, then backfill with 300mm thick well-graded gravel soil, with the maximum particle size of the gravel <100mm, and then use the construction excavator crawler to compact 6-8 times, and then construct the concrete cushion after reaching the design elevation. The surface of the foundation platform 20 can be cast with C20 concrete into a 200mm thick cushion. The top surface of the cushion should reach the design elevation, and the horizontal surface of the cushion should cover the contour range of the standing platform formed by the excavation of the collapsed accumulation body below the steep cliff 10.

[0085] like Figure 2 As shown, in one embodiment, in the step of pouring a concrete cushion layer of a preset thickness at the foot of the steep cliff 10 to obtain the foundation platform 20, the foundation platform 20 includes a first step 21, a second step 22, a third step 23 and a fourth step 24 of different heights, wherein relative to the second step 22, the third step 23 and the fourth step 24, the first step 21 has the largest extension length in the first direction.

[0086] In order to adapt to the complex terrain at the foot of the slope, the steps are divided into four levels. According to the actual terrain, the first step 21 has the maximum extension length in the first direction, which can improve construction efficiency and avoid too long time for opening the foundation.

[0087] In actual construction, it can be applied to the location of the steep cliff at the exit of Gongtan Tunnel of the first phase of the Pengshui-Youyang Expressway. The steep cliff has dangerous rock bodies in some parts and is in an unstable state. Under the influence of adverse factors such as heavy rain and vibration, it is possible to collapse and destroy the steep cliff. If it develops further, new dangerous rock bodies will be formed. In order to ensure the overall stability of the steep cliff rock wall, it is necessary to reinforce and protect the steep cliff rock wall. First, it is necessary to set up a support so that workers can stand on the scaffolding to reinforce and protect the steep cliff rock wall. However, the height of the steep cliff here reaches 190m, the coverage width is 85.5m, and the slope is close to 90 degrees. It is difficult for traditional construction supports to be set up on a steep cliff of more than 100 meters, and it is easy to have safety hazards such as instability after setting up. In the technical solution of the present invention, the foundation platform includes multiple steps, which can adapt to the complex environment at the foot of the steep cliff slope and provide stable support for the upper support. The cantilever support is anchored on the steep cliff, and the cantilever support is closely connected to the steep cliff rock wall to provide a stable working environment for construction personnel. The cantilever support structure is stable, making the construction environment safer and more stable. The second-level support is erected on the cantilever frame, separated from the first-level support structure, and relatively independent in force. The first-level support and the second-level support are separated in structure and relatively independent in force, so that the erection of the second-level support will not increase the burden of the second-level support, and it is safer. Moreover, during the construction process, the first-level support can be dismantled without affecting the construction of the upper support. After that, the materials that meet the requirements of the first-level support are used to erect the upper support. It saves building materials, realizes the recycling of materials, and reduces costs. The second-level support is further supported by the slope pole foundation anchored on the steep cliff rock wall, so that the construction support can be better and more stably fixed on the steep cliff rock wall, providing workers with a stable construction environment and ensuring construction safety.

[0088] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A construction support system, characterized in that: The construction support system is used for construction on a steep cliff, wherein the slope of the steep cliff is greater than or equal to 79 degrees and less than or equal to 90 degrees, and the construction support system includes: A foundation platform, the foundation platform is arranged at the foot of the steep cliff, the foundation platform comprises a plurality of steps, the plurality of steps are fixedly connected in sequence along a first direction and have increasing heights; A first-level bracket, wherein the first-level bracket is erected on multiple steps of the foundation platform; A cantilever platform, the cantilever platform is anchored on the steep cliff rock wall and is located above the first-level support; the cantilever platform includes a plurality of cantilever frames, all of which are in the form of steel trusses, and the plurality of cantilever frames are arranged and connected transversely along the mountain body of the steep cliff, and each of the cantilever frames is anchored on the steep cliff rock wall and extends in a horizontal direction away from the steep cliff rock wall; A second-stage bracket, wherein the second-stage bracket is partially disposed on the cantilever platform, the cantilever platform comprises a first channel steel tie rod, a notch of the first channel steel tie rod is upwardly fixed to the top surface of the plurality of cantilever frames, and the second-stage bracket is partially disposed on the first channel steel tie rod; and A slope anchor, wherein the slope anchor is anchored to the steep cliff rock wall and is located above the cantilever platform, wherein another part of the second-level bracket is arranged on the slope anchor, and the extension direction of the slope anchor is horizontal, and the portion of the slope anchor anchored to the steep cliff rock wall is defined as a fixed section, and the portion of the slope anchor extending from the steep cliff rock wall is defined as an extended section, and the fixed section and the extended section are integrally formed, and the second-level bracket includes a vertical pole and a horizontal pole, the vertical pole is fixedly connected to the horizontal pole, and an adjustable base is installed at the lower part of the vertical pole, and the adjustable base is fixed to the extended section of the slope anchor; The second-level support is erected on the cantilever frame and is separated from the first-level support structure. The first-level support can be dismantled without affecting the erection of the second-level support, and is used to erect the second-level support.

2. The construction support system according to any one of claims 1, characterized in that: The construction support system also includes a plurality of prestressed anchor cables, which are fixed at intervals on the steep cliff rock wall. The plurality of prestressed anchor cables are all located above the first-level support and next to the cantilever platform to reinforce the steep cliff rock wall next to the cantilever platform.

3. The construction support system according to claim 1, characterized in that: The first-stage supports and the second-stage supports are staggered by 0.3m.

4. A method for erecting a construction support system, characterized in that: The method for erecting a construction support system is used to erect a construction support system as claimed in any one of claims 1 to 3, comprising: Build the foundation platform; Building a first-level support on the foundation platform; Anchoring the cantilever platform at a preset position on the steep cliff rock wall above the first-level support; dismantling the first-level support; Setting up part of the second-level support on the cantilever platform; Determine whether the slope of the steep cliff is less than 90 degrees; If so, anchor the slope anchor horizontally to the cliff rock wall; Another part of the second-level bracket is fixed to the slope anchor rod, and the second-level bracket fixed on the slope anchor rod is matched and connected with the second-level bracket erected on the cantilever platform.

5. The method for erecting a construction support system according to claim 4, characterized in that: The steps of building the foundation platform specifically include: Leveling and compacting the foot of the steep cliff; Pour cement mortar into the preset position of the slope foot to seal the surface gaps A concrete cushion layer of a preset thickness is poured at the foot of the steep cliff to obtain the foundation platform.

6. The method for erecting a construction support system according to claim 5, characterized in that: In the step of pouring a concrete cushion layer of preset thickness at the foot of the steep cliff to obtain the foundation platform, the foundation platform includes a first step, a second step, a third step and a fourth step of different heights, wherein the first step has the largest extension length in the first direction relative to the second step, the third step and the fourth step.

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