Split mounting type safety crawling ladder system for concrete structure deep foundation pit

Abstract

The utility model relates to the technical field of constructional engineering, in particular to a split mounting type safety crawling ladder system for a concrete structure deep foundation pit. Comprising a plurality of ladder stand sections capable of being assembled, a base flange and at least one safety platform. The base flanges are fixed on the foundation pit wall at intervals; the upper end and the lower end of each crawling ladder section are fixed to a base flange, every two adjacent crawling ladder sections are rapidly assembled through an axial connector, and when the adjacent sections are axially aligned, automatic locking is achieved; detachable protective rings are arranged on the crawling ladder sections at intervals, and elastic buffer layers are embedded in the inner sides of the detachable protective rings; the safety platform is fixed to the foundation pit wall, and the upper portion and the lower portion of the safety platform are connected with the crawling ladder sections. The base flange is matched with the axial connector, so that the crawling ladder sections can be quickly assembled and disassembled, the length of the crawling ladder can be dynamically adjusted according to the depth of a foundation pit, and the construction adaptability and the repeated utilization rate of components are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a modular safety ladder system for deep foundation pits in concrete structures. Background Technology

[0002] In deep foundation pit construction of concrete structures, the safety and efficiency of vertical transportation channels directly affect project progress and personnel safety. Traditional deep foundation pit ladders mostly adopt fixed welded structures or simple assembly forms, and their technical defects are mainly reflected in the following aspects: First, the structural form is monotonous and difficult to adapt to the operational needs of foundation pits of different depths, resulting in insufficient matching between the ladder system and the actual working conditions of the foundation pit. During construction, secondary modifications or discarding of redundant components are often required, resulting in resource waste. Second, conventional anti-corrosion processes are not resistant to the high humidity and corrosive media working environment of the foundation pit. Long-term use is prone to problems such as rust and structural strength decay, threatening the stability of the ladder system. Third, the safety protection system has design blind spots. When the continuous section of the ladder is too long, there is a lack of necessary intermediate buffer platforms, which significantly increases the risk of climbing fatigue. In addition, improper control of the safety distance between the ladder and the side wall of the foundation pit can easily lead to personnel collisions or falls. Fourth, the traditional ladder system relies on welding or temporary fixing for node connection, resulting in a high component loss rate during disassembly, large space occupation for transportation and storage, and difficulty in meeting the requirements of green construction for material recycling.

[0003] In recent years, while some modular ladder solutions have improved flexibility to some extent, significant shortcomings remain in the reliability of node connections, platform scalability, and integration of safety protection. For example, discontinuous load transfer paths between modules lead to insufficient overall stability; weak compatibility design between the platform and the ladder affects adaptability to various working conditions; and the protective devices lack systematic integration with the main structure. These problems make it difficult for existing technologies to meet the comprehensive requirements of ladder systems for safety, economy, and environmental adaptability in complex deep foundation pit construction, necessitating technological breakthroughs through structural innovation and standardized design. Summary of the Invention

[0004] To solve the above problems, this utility model provides a modular safety ladder system for deep foundation pits in concrete structures.

[0005] The present invention adopts the following technical solution: a modular safety ladder system for deep foundation pits of concrete structures, comprising several modular ladder segments, a base flange and at least one safety platform;

[0006] The base flanges are fixed at intervals to the pit wall;

[0007] The upper and lower ends of the ladder segment are fixed to the base flange. Adjacent ladder segments are quickly assembled through an axial connector, and automatically locked when adjacent segments are axially aligned.

[0008] The ladder sections are equipped with removable guard rings at intervals, and the inner side of the removable guard rings is embedded with an elastic buffer layer;

[0009] The safety platform is fixed to the pit wall, and both the upper and lower parts of the safety platform are connected to the ladder segments.

[0010] In some embodiments, the safety platform has foldable extension plates at the four corners of its base frame. The extension plates are connected to the base plate via hinges and, when unfolded, form an extended working surface.

[0011] In some embodiments, the safety platform is provided with a diagonal brace at the bottom. The diagonal brace is a hydraulic adaptive telescopic rod with a built-in pressure sensor and a miniature hydraulic pump. When the platform load exceeds a threshold, the length of the diagonal brace is automatically extended and an early warning is issued.

[0012] In some embodiments, the removable retaining ring has an elastic buffer layer that is a honeycomb silicone structure, with a wear-resistant nylon braided layer covering its outer side.

[0013] In some embodiments, the columns of the ladder segment are made of carbon fiber-aluminum alloy composite pipes, with distributed fiber optic sensors embedded in the pipe walls for real-time monitoring of structural strain.

[0014] In some embodiments, the detachable guard ring is a semi-circular ring structure, and the two ends of the semi-circular ring structure are fixed to the ladder segment by bolts. The elastic buffer layer is fixed to the inside of the detachable guard ring by bolts. Connecting flat steel is also connected between different detachable guard rings as guardrails.

[0015] In some embodiments, the surface of the connecting flat steel is coated with an anti-slip conductive coating, which, together with the removable protective ring, forms a grounding path.

[0016] In some embodiments, the base flange and the safety platform are anchored to the pit wall using chemical anchors.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Modular and flexible assembly: Through the cooperation of the base flange and axial connector, the ladder segments can be quickly assembled and disassembled. The ladder length can be dynamically adjusted according to the depth of the pit, which significantly improves construction adaptability and component reuse rate.

[0019] Multiple safety protections are integrated: the elastic buffer ring combined with the distributed fiber optic sensing system monitors structural strain in real time and buffers personnel collision impacts; the safety platform and the foldable extension plate form a stable working surface, and the hydraulic adaptive diagonal brace ensures that the support force is automatically adjusted when the platform is overloaded, comprehensively improving safety redundancy.

[0020] Environmental adaptability and durability: Carbon fiber-aluminum alloy composite pipes and galvanized anti-corrosion treatment effectively resist corrosion in the humid environment of the foundation pit; anti-slip conductive coating and grounding path design eliminate static electricity risks and ensure electrical safety.

[0021] Intelligent operation and maintenance and energy saving: Modular design reduces transportation and storage costs, chemical anchor bolt fixing reduces damage to the foundation pit wall; sensor data supports structural health assessment and extends the system's entire life cycle. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the installation of this utility model;

[0023] Figure 2 for Figure 2 Side view;

[0024] Figure 3 This is a schematic diagram of the removable retaining ring installation;

[0025] Figure 4 This is a schematic diagram of the ladder segments;

[0026] Figure 5 Top view of the safety platform;

[0027] Figure 6 Side view of the security platform;

[0028] Figure 7 This is a schematic diagram of an axial connector;

[0029] In the diagram, 1-ladder segment, 2-safety platform, 3-base flange, 4-connecting flat steel, 5-removable guard ring, 6-bolt, 7-chemical anchor, 8-elastic buffer layer, 9-folding extension plate, 10-hydraulic adaptive telescopic rod. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] like Figure 1 , 2 As shown, a modular safety ladder system for deep foundation pits of concrete structures includes several modular ladder segments 1, a base flange 3, and at least one safety platform 2.

[0032] The base flange 3 is fixed at intervals to the pit wall;

[0033] The upper and lower ends of the ladder segment 1 are fixed on the base flange 3. Adjacent ladder segments 1 are quickly assembled through an axial connector and automatically locked when adjacent segments are axially aligned.

[0034] The ladder section 1 is provided with removable guard rings 5 ​​at intervals, and the removable guard rings 5 ​​have an elastic buffer layer 8 embedded inside.

[0035] The safety platform 2 is fixed to the pit wall, and the safety platform 2 is connected to the ladder segment 1 at both the top and bottom.

[0036] The modular ladder segments and base flanges are combined to achieve height adjustability of the ladder system, adapting to different pit depth requirements; the automatic locking mechanism of the axial connector simplifies the assembly process and improves construction efficiency; the integrated connection of the safety platform and ladder segments forms a segmented safety passage, reducing the risk of falls from heights.

[0037] like Figure 5 As shown, the safety platform 2 has foldable extension plates 9 at the four corners of its base frame. The extension plates are connected to the base plate via hinges and extend to form an extended working surface when unfolded. The design of the foldable extension plates expands the working surface within a limited space, meeting the needs of multi-person collaborative work. At the same time, the hinge structure ensures a rigid connection with the base frame when unfolded, preventing the platform from becoming unstable due to excessive cantilever.

[0038] like Figure 6 As shown, the safety platform 2 is equipped with diagonal bracing at its bottom. The diagonal bracing is a hydraulic adaptive telescopic rod 10, which has a built-in pressure sensor and a miniature hydraulic pump. When the platform load exceeds a threshold, the length of the diagonal bracing is automatically extended and an early warning is issued. The hydraulic adaptive telescopic rod dynamically adjusts the support force through real-time load feedback to prevent the platform from tilting due to overload or deformation of the pit wall; the early warning function provides advance notice of abnormal loads, enhancing the active safety protection capability.

[0039] The removable protective ring 5 has an elastic buffer layer 8 with a honeycomb silicone structure, covered with a wear-resistant nylon braided layer. The honeycomb silicone buffer layer absorbs impact energy through its porous structure, reducing impact damage when personnel come into contact with the protective ring; the wear-resistant nylon braided layer covers the silicone surface to prevent material aging in humid environments and extend the service life of the protective ring.

[0040] Ladder segment 1 includes uprights on both sides and two ladder sections between the uprights. The uprights of ladder segment 1 are made of carbon fiber-aluminum alloy composite pipes, with distributed fiber optic sensors embedded in the pipe walls for real-time monitoring of structural strain. The carbon fiber-aluminum alloy composite pipes achieve a balance between lightweight and high strength, reducing the load of the ladder's self-weight on the pit wall; the distributed fiber optic sensors embedded in the pipe walls enable distributed monitoring of structural strain and precise location of potential damage areas.

[0041] The surface of the connecting flat steel 4 is covered with an anti-slip conductive coating, which, together with the detachable protective ring 5, forms a grounding path. The anti-slip conductive coating improves climbing friction through surface roughening treatment. At the same time, the synergistic design of the coating and the grounding path of the protective ring eliminates the risk of static electricity accumulation and prevents the explosion of flammable gases in the pit caused by electric sparks.

[0042] The detachable guard ring 5 has a semi-circular ring structure. Both ends of the semi-circular ring structure are fixed to the ladder segment 1 by bolts 6. The elastic buffer layer 8 is fixed to the inside of the detachable guard ring 5 by bolts. Connecting flat steel 4 serves as a guardrail between different detachable guard rings 5. The semi-circular ring uses a split bolt fixing method for easy and quick disassembly and maintenance; the independent connection design between the elastic buffer layer and the guard ring allows for partial replacement of damaged parts, reducing maintenance costs; the connecting flat steel forms a continuous guardrail, filling the protection blind spots of the traditional intermittent ladder guardrail design.

[0043] The base flange 3 and the safety platform 2 are anchored to the pit wall by chemical anchors 7. The chemical anchor method avoids stress concentration damage to the pit wall caused by traditional expansion bolts, and is especially suitable for soft soil or fractured rock conditions; the preload of the anchors and flanges enhances the ladder system's resistance to lateral impacts and prevents overall overturning.

[0044] System composition and installation process:

[0045] Base fixing: Drill holes at preset intervals on the side wall of the pit, and use chemical anchors to vertically anchor the base flange to the pit wall. The flange face is aligned with the ladder axis to form a load-bearing reference point.

[0046] Ladder Assembly: Each ladder segment is hoisted above the base flange, and the upper and lower segments are automatically aligned and locked using axial connectors. The ladder segment columns are made of carbon fiber-aluminum alloy composite pipes, with distributed fiber optic sensors pre-embedded in the pipe walls, forming a continuous monitoring network after connection.

[0047] Guardrail Installation: Install semi-circular, detachable guardrails at designated heights on the ladder sections. An elastic buffer layer is bolted to the inside of the guardrail, and flat steel bars are welded between adjacent guardrails to form a continuous guardrail. The nylon braided layer on the outside of the guardrail and the anti-slip conductive coating form a grounding path.

[0048] Safety Platform Configuration: The safety platform is installed at a preset height. The foldable extension plates at the four corners of the base frame unfold and lock with hinges to form an extended working surface. The hydraulic adaptive bracing at the bottom of the platform is anchored to the pit wall. Pressure sensors monitor the load in real time and feed it back to the control unit. In case of overload, the hydraulic pump is triggered to adjust the length of the bracing.

[0049] System debugging: Start the distributed fiber optic sensor and hydraulic control system, calibrate the verticality of the ladder and the horizontality of the platform, and put it into use after completing the lightning protection grounding test.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A prefabricated safety ladder system for deep foundation pits of concrete structures, characterized in that: It includes several assembleable ladder segments (1), base flange (3) and at least one safety platform (2); The base flange (3) is fixed at intervals on the pit wall; The upper and lower ends of the ladder segment (1) are fixed on the base flange (3). Adjacent ladder segments (1) are quickly assembled through an axial connector and automatically locked when adjacent segments are axially aligned. The ladder section (1) is provided with removable guard rings (5) at intervals, and the removable guard rings (5) are inlaid with an elastic buffer layer (8) on the inner side. The safety platform (2) is fixed to the pit wall, and the safety platform (2) is connected to the ladder segment (1) both above and below.

2. The prefabricated safety ladder system for deep foundation pit of concrete structure according to claim 1, characterized in that: The safety platform (2) has foldable extension plates (9) at the four corners of its base frame. The extension plates are connected to the base plate by hinges and form an extended working surface when unfolded.

3. The prefabricated safety ladder system for deep foundation pit of concrete structure according to claim 2, characterized in that: The safety platform (2) is equipped with a diagonal brace at the bottom. The diagonal brace is a hydraulic adaptive telescopic rod (10) with a built-in pressure sensor and a micro hydraulic pump. When the platform load exceeds the threshold, the length of the diagonal brace is automatically extended and an early warning is issued.

4. The assembled safety ladder system for deep foundation pits of concrete structures according to claim 1, characterized in that: The elastic buffer layer (8) of the detachable protective ring (5) is a honeycomb silicone structure, and its outer side is covered with a wear-resistant nylon braided layer.

5. The prefabricated safety ladder system for deep foundation pit of concrete structure according to claim 1, characterized in that: The columns of the ladder segment (1) are made of carbon fiber-aluminum alloy composite pipes, with distributed fiber optic sensors embedded in the pipe walls for real-time monitoring of structural strain.

6. The prefabricated safety ladder system for deep foundation pit of concrete structure according to claim 1, characterized in that: The detachable guard ring (5) is a semi-circular ring structure. The two ends of the semi-circular ring structure are fixed to the ladder section (1) by bolts (6). The elastic buffer layer (8) is fixed to the inside of the detachable guard ring (5) by bolts. Connecting flat steel (4) is also connected between different detachable guard rings (5) as guardrails.

7. The prefabricated safety ladder system for deep foundation pit of concrete structure according to claim 6, characterized in that: The surface of the connecting flat steel (4) is covered with an anti-slip conductive coating, which together with the detachable protective ring (5) forms a grounding path.

8. The assembled safety ladder system for deep foundation pits of concrete structures according to claim 1, characterized in that: The base flange (3) and the safety platform (2) are anchored to the pit wall by chemical anchors (7).

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