Supporting and hanging structure for foundation pit steel support

Abstract

The utility model discloses a supporting and hanging structure for a foundation pit steel support. The supporting and hanging structure comprises an embedded bracket, a length compensation plate, a steel support bearing assembly and a side limiting baffle. The embedded bracket is embedded and installed in a waist beam of a foundation pit, the steel support bearing assemblies are fixedly installed on the embedded bracket, and the steel support bearing assemblies are arranged on the waist beam oppositely arranged in the foundation pit in pairs; the two ends of the steel structure support can be placed on the pair of steel support bearing assemblies respectively, one end of the steel structure support abuts against one set of steel support bearing assemblies, a gap exists between the other end of the steel structure support and the other set of steel support bearing assemblies, and the gap is filled with the length compensation plate. Side limiting baffles are arranged on the two sides of each set of steel support bearing assembly, and the two side limiting baffles are arranged on the two sides of the end of the steel structure support. The utility model relates to the technical field of foundation pit supporting structures, and can solve the problems that a steel structure support in the prior art is difficult to temporarily fix and has a falling risk.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit supporting structures, in particular to a supporting structure for foundation pit steel supports. Background Art

[0002] Foundation pit support is a temporary measure of support, reinforcement, protection and groundwater control for the foundation pit to protect the safety of underground main structure construction and the surrounding environment of the foundation pit. Foundation pit support engineering is a discipline that intersects geotechnical engineering, structural engineering and construction technology. It is a systematic project with the interaction of multiple complex factors, and its characteristics are different in different regional geological conditions. Common forms of foundation pit support mainly include: 1. Pile support, pile support, pile anchor, and pile cantilever; 2. Underground continuous wall support, ground-connected wall + support; 3. Cement retaining wall; 4. Soil nail wall (spray anchor support); 5. Reverse arch wall; 6. Original soil slope; 7. Pile, wall and support system; 8. Simple horizontal support; 9. Reinforced concrete pile row.

[0003] The horizontal supports in the prior art include reinforced concrete supports and steel structure supports. The steel structure supports are easy and quick to assemble and dismantle. They are tool-type supports that can be repeated many times and can be prestressed, which has certain advantages. However, compared with reinforced concrete supports, steel structure supports are more deformable and more sensitive to load and temperature. In addition, since the bearing capacity of round steel pipes and steel sections is not as good as that of reinforced concrete supports, the horizontal gap between supports cannot be very large and has certain distance limitations. When hoisting large-span steel structure supports, temporary fixation of the steel structure supports is often difficult due to gap problems, and there is a certain risk of falling. Therefore, it is necessary to provide a support structure for foundation pit steel supports that can solve the problems of difficulty in temporary fixation of steel structure supports and the risk of falling in the prior art. Summary of the invention

[0004] The utility model aims to provide a supporting structure for foundation pit steel support, which can solve the problems of difficulty in temporary fixing of steel structure support and risk of falling in the prior art.

[0005] The utility model is achieved in this way:

[0006] A hanging structure for foundation pit steel support, comprising a pre-embedded corbel, a length compensation plate, a steel support supporting assembly and a side limit baffle; the pre-embedded corbel is pre-embedded and installed in the waist beam of the foundation pit, the steel support supporting assembly is fixedly installed on the pre-embedded corbel, and the steel support supporting assemblies are arranged in pairs on the waist beams relatively arranged in the foundation pit; the two ends of the steel structure support can be respectively placed on a pair of steel support supporting assemblies, and one end of the steel structure support is abutted against one group of steel support supporting assemblies, and there is a gap between the other end of the steel structure support and the other group of steel support supporting assemblies, and the length compensation plate is filled in the gap; side limit baffles are arranged on both sides of each group of steel support supporting assemblies, so that the two side limit baffles are arranged on both sides of the end of the steel structure support.

[0007] Each group of steel support bearing components includes a top mounting plate and a bottom supporting steel plate; the top mounting plate and the bottom supporting steel plate are connected to form an L-shaped structure, the top mounting plate is fixed on the waist beam through embedded corbels, and the end of the steel structure support is placed on the bottom supporting steel plate.

[0008] Side limit baffles are installed on both sides of the bottom supporting steel plate. The bottom supporting steel plate, the two side limit baffles and the top mounting plate form a semi-closed structure with openings at the upper and inner ends, so that the end of the steel structure support can be placed on the bottom supporting steel plate and located between the two side limit baffles and the top mounting plate.

[0009] One end of the steel structure support is fitted with the top mounting plate of one set of steel support supporting components, and a length compensation plate is filled between the other end of the steel structure support and the top mounting plate of another set of steel support supporting components.

[0010] The length compensation plate is composed of a plurality of superimposed plane plates, or the length compensation plate is a wedge-shaped plate.

[0011] One group of the steel support and supporting components is fixedly installed on the cast-in-place piles of the foundation pit through pre-embedded corbels, and the other group of steel support and supporting components is fixedly installed on the structural support piles of the foundation pit through pre-embedded corbels.

[0012] The steel support bearing assembly also includes a sleeve support and an inclined brace; the sleeve supports of one group of steel support bearing assemblies are pre-embedded and installed on the cast-in-place piles, and the sleeve supports of another group of steel support bearing assemblies are pre-embedded and installed on the structural support piles, and the inclined brace is obliquely installed between the bottom supporting steel plate and the sleeve support.

[0013] A U-shaped lifting ring is pre-buried on the waist beam.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model is provided with a steel support supporting assembly and a side limit baffle, and the axial displacement of the steel structure support is limited by the top mounting plate, the steel structure support is supported by the bottom supporting steel plate, and the lateral displacement of the steel structure support is limited by the lateral baffle. The steel structure support can be temporarily fixed by multi-directional limiting, so as to ensure the supporting effect of the steel structure support, prevent the steel structure support from displacement or even falling accidents, and the subsequent disassembly is also relatively convenient.

[0016] 2. The utility model is provided with a length compensation plate, which utilizes a plurality of stacked flat plates or wedge-shaped plates to fill the gap between the steel structure support and the top mounting plate, thereby improving the temporary fixing stability of the steel structure support, ensuring the axial fixation of the steel structure support and its horizontal supporting effect, further reducing the risk of the steel structure support falling, and solving the problem of gaps caused by deformation of the steel structure support and other factors.

[0017] 3. The utility model is provided with embedded corbels, hoop supports and diagonal braces. The embedded corbels are embedded in the waist beam, the hoop supports are embedded in the retaining structure of the foundation pit, and the diagonal braces are supported between the hoop supports and the bottom supporting steel plate. The retaining structure of the foundation pit is used as the force supporting basis, so that the installation stability of the entire steel support supporting assembly is high and the bearing capacity is strong. It can stably support the steel structure support, thereby improving the stability and safety of the steel structure support. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a construction schematic diagram of the support structure for foundation pit steel support of the utility model;

[0019] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0020] Figure 3 yes Figure 1 Middle BB section view.

[0021] In the figure, 1 is steel structure support, 2 is embedded corbel, 3 is top mounting plate, 4 is length compensation plate, 5 is bottom supporting steel plate, 6 is hoop support, 7 is diagonal brace, 8 is crown beam, 9 is cast-in-place pile, 11 is waist beam, 12 is structural support pile, 13 is side limit baffle, 14 is reinforced concrete support. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Please see attached Figure 1 To Attachment Figure 3A supporting structure for foundation pit steel support, comprising a pre-embedded corbel 2, a length compensation plate 4, a steel support supporting assembly and a side limit baffle 13; the pre-embedded corbel 2 is pre-embedded and installed in the waist beam 11 of the foundation pit, the steel support supporting assembly is fixedly installed on the pre-embedded corbel 2, and the steel support supporting assemblies are arranged in pairs on the waist beam 11 arranged oppositely in the foundation pit; the two ends of the steel structure support 1 can be respectively placed on a pair of steel support supporting assemblies, and one end of the steel structure support 1 is abutted against one group of steel support supporting assemblies, and there is a gap between the other end of the steel structure support 1 and the other group of steel support supporting assemblies, and the length compensation plate 4 is filled in the gap; side limit baffles 13 are provided on both sides of each group of steel support supporting assemblies, so that the two side limit baffles 13 are arranged on both sides of the end of the steel structure support 1.

[0024] The steel support supporting assembly is installed on the waist beam 11 through the embedded corbel 2, and the installation is firm and reliable. Since the waist beam 11 is usually constructed on the foundation pit enclosure structure, after the steel support supporting assembly supports the steel structure support 1, the load is transferred to the enclosure structure through the waist beam 11, which improves the setting stability of the steel structure support 1. At the same time, through the setting of the lateral baffle 13, the two sides of the steel structure support 1 can be limited, effectively preventing the steel structure support 1 from falling.

[0025] Due to deformation of the steel structure support 1, installation processing errors and other reasons, the length of the steel structure support 1 changes, and a gap is formed between the end of the steel structure 1 and the steel support supporting assembly. Filling the gap with the length compensation plate 4 is beneficial to further improve the setting stability of the steel structure support 1, ensure temporary fixation and horizontal support effects, and avoid falling accidents.

[0026] Please see attached Figure 1 and attached Figure 2 Each group of steel support bearing components includes a top mounting plate 3 and a bottom supporting steel plate 5; the top mounting plate 3 and the bottom supporting steel plate 5 are connected to form an L-shaped structure, the top mounting plate 3 is fixedly mounted on the waist beam 11 through the embedded corbel 2, and the end of the steel structure support 1 is placed on the bottom supporting steel plate 5.

[0027] Preferably, the top mounting plate 3 and the bottom supporting steel plate 5 can be an integrated structure, made of angle steel, and the size and specification of the angle steel can be determined according to the size of the steel structure support 1 to ensure stable supporting of the steel structure support 1.

[0028] Please see attached Figure 3 Side limit baffles 13 are installed on both sides of the bottom supporting steel plate 5. The bottom supporting steel plate 5, the two side limit baffles 13 and the top mounting plate 3 form a semi-enclosed structure with openings at the upper end and the inner end (i.e., the end facing the inside of the foundation pit), so that the end of the steel structure support 1 can be placed on the bottom supporting steel plate 5 and located between the two side limit baffles 13 and the top mounting plate 3.

[0029] The end of the steel structure support 1 can be hoisted from the opening at the top to the bottom supporting steel plate 5, and the horizontal support of the steel structure support 1 on a pair of bottom supporting steel plates 5 is ensured through the opening at the inner end. At the same time, the lateral sliding of the steel structure support 1 is limited by the limit baffles 13 on both sides, and the axial sliding of the steel structure support 1 is limited by the top mounting plate 3.

[0030] Please see attached Figure 1 One end of the steel structure support 1 is fitted with the top mounting plate 3 of one group of steel support supporting components, and a length compensation plate 4 is filled between the other end of the steel structure support 1 and the top mounting plate 3 of another group of steel support supporting components.

[0031] When hoisting the steel structure support 1, one end of it can be placed against the top mounting plate 3 of one group of steel support supporting assemblies, and the gap between the other end and the top mounting plate 3 of another group of steel support supporting assemblies can be filled and clamped with a length compensation plate 4 of corresponding size to ensure the temporary fixing stability of the steel structure support 1, ensure the horizontal support effect, and prevent the steel structure support 1 from falling.

[0032] The length compensation plate 4 is composed of a plurality of superimposed flat plates, or the length compensation plate 4 is a wedge-shaped plate. The gap between the steel structure support 1 and the top mounting plate 3 can be compensated by a combination of different numbers of flat plates or wedge-shaped plates at different thicknesses, thereby reducing the horizontal spacing of the steel structure support 1 caused by size, deformation, etc., ensuring temporary fixation and stable support effects, avoiding the steel structure support 1 from falling, and having good adaptability.

[0033] Please see attached Figure 1 One of the steel support and supporting components is fixedly installed on the cast-in-place piles 9 of the foundation pit through the pre-embedded corbels 2, and the other group of steel support and supporting components is fixedly installed on the structural support piles 12 of the foundation pit through the pre-embedded corbels 2.

[0034] The bored piles 9 and the structural support piles 12 serve as the retaining structures of the foundation pit and have good bearing capacity. After the steel structure support 1 is hoisted, the load can be directly transferred to the bored piles 9 and the structural support piles 12 through the embedded corbels 2 and the waist beams 11, thereby improving the hoisting stability of the steel structure support 1.

[0035] Please see attached Figure 1 To Attachment Figure 3 The steel support supporting assembly also includes a sleeve support 6 and a diagonal brace 7; the sleeve support 6 of one group of steel support supporting assemblies is pre-buried and installed on the cast-in-place piles 9, and the sleeve support 6 of another group of steel support supporting assemblies is pre-buried and installed on the structural support piles 12, and the diagonal brace 7 is obliquely installed between the bottom supporting steel plate 5 and the sleeve support 6.

[0036] The sleeve support 6 can be composed of a steel plate and anchor bars, the steel plate is pre-buried in the cast-in-place pile 9 and the structural support pile 12 through the anchor bars, and the diagonal brace 7 provides a top support for the bottom supporting steel plate 5, improves the installation stability of the steel structure support 1, and transfers the load to the cast-in-place pile 9 and the structural support pile 12. According to the support load requirements, one or more diagonal braces 7 can be provided.

[0037] The waist beam 11 is pre-buried with a U-shaped lifting ring (not shown in the figure), which can be used as a lifting point for the unloading wire rope after the steel structure support 1 is hoisted, thereby serving as a secondary protection measure for the steel structure support 1 to prevent falling.

[0038] Please see attached Figure 1 To Attachment Figure 3 Example 1: In the foundation pit construction of a sewage treatment station, the support types include reinforced concrete bored piles + main foundation pit side wall interlocking piles + double-tube rotary jet piles + mesh jetting. The first support system is reinforced concrete support + crown beam (center elevation 83.1m), and the second is reinforced concrete waist beam + steel structure support (center elevation 76.5m).

[0039] According to the construction drawings, conventional construction techniques are used to construct cast-in-place piles 9, structural support piles 12, the first reinforced concrete support 14 + crown beam 8, earth excavation, and the second waist beam 11 steel bar binding. The construction process will not be repeated here.

[0040] After the reinforcement of the waist beam 11 is tied, the surveying personnel accurately lay out the center point and elevation of the embedded corbel 2 strictly according to the coordinates and elevation positions on the drawing. The surveying team uses spray paint to draw a line on the upper and lower outer lines of the embedded corbel 2 on the reinforcement of the waist beam 11, thereby accurately welding the reinforcement of the embedded corbel 2 to the reinforcement of the waist beam 11.

[0041] After the embedded bracket 2 is embedded, the top mounting plate 3 is welded to the embedded bracket 2, and a cross point is painted at the center of the top mounting plate 3 as a calibration reference point after the installation of the steel structure support 1. The positioning allowable deviation of the steel structure support 1 is required to be 2 cm (horizontal position deviation) and 1.5 cm (height deviation).

[0042] One end of the embedded corbel 2 is fixed to the steel bar of the waist beam 11 by double-sided welding, and the other end of the embedded corbel 2 is fixed to the top mounting plate 3 by perforation plug welding. No missing welding or cold welding is allowed. Concrete pouring in the waist beam 11 and embedded corbel 2 area can be carried out only after inspection to ensure that stable and reliable support can be provided for the hoisting of the steel structure support 1.

[0043] After the waist beam 11 is poured and the strength reaches 80% of the design strength, the earthwork is excavated to 40 cm below the bottom elevation of the steel structure support 1 and the steel structure support 1 can be hoisted. The hoop support 6 is embedded below the steel structure support 1 on the cast-in-place pile 9 and the structural support pile 12.

[0044] Since the construction site is relatively small and the steel support is long, in order to reduce the exposure time of the foundation pit without support and shorten the construction time of each cycle of support, the steel structure support 1 is pre-assembled outside the pit and then hoisted in sections by conventional lifting methods such as automobile cranes for installation in the foundation pit. The steel structure support 1 is hoisted at two points, and safety ropes are tied at both ends of the steel structure support 1 to prevent the steel structure support 1 from shaking and safety accidents during the hoisting process, so as to achieve safe, stable and accurate hoisting.

[0045] After the steel structure support 1 is hoisted into place, do not release the hook, and place one end of the steel structure support 1 on the bottom supporting steel plate 5 on the cast-in-place pile 9, and use the side limit baffles 13 on both sides of the bottom supporting steel plate 5 to prevent one end of the steel structure support 1 from falling.

[0046] The steel structure support 1 is placed on the bottom supporting steel plate 5 on the structural support pile 12, and the side limit baffles 13 on both sides of the bottom supporting steel plate 5 are used to prevent one end of the steel structure support 1 from falling. The position of the steel structure support 1 is adjusted so that one end of the steel structure support 1 fits the bottom supporting steel plate 5 on the cast-in-place pile 9, and the gap between the other end of the steel structure support 1 and the bottom supporting steel plate 5 on the structural support pile 12 is filled with a 50mm thick steel plate, i.e., a length compensation plate 4, to compensate for the length of the steel structure support 1, and the steel structure support 1 is supported and hung in the foundation pit to ensure that the bottom supporting steel plates 5 on both sides stably support the steel structure support 1 and will not fall.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A supporting structure for foundation pit steel support, characterized by: The invention comprises a pre-buried corbel (2), a length compensation plate (4), a steel support supporting assembly and a side limit baffle (13); the pre-buried corbel (2) is pre-buried and installed in the waist beam (11) of the foundation pit, the steel support supporting assembly is fixedly installed on the pre-buried corbel (2), and the steel support supporting assemblies are arranged in pairs on the waist beam (11) arranged opposite to each other in the foundation pit; the two ends of the steel structure support (1) can be respectively placed on a pair of steel support supporting assemblies, and one end of the steel structure support (1) is in contact with one group of steel support supporting assemblies, and a gap exists between the other end of the steel structure support (1) and the other group of steel support supporting assemblies, and the length compensation plate (4) is filled in the gap; side limit baffles (13) are arranged on both sides of each group of steel support supporting assemblies, so that the two side limit baffles (13) are arranged on both sides of the end of the steel structure support (1).

2. The supporting structure for foundation pit steel support according to claim 1 is characterized in that: Each group of the steel support bearing components comprises a top mounting plate (3) and a bottom supporting steel plate (5); the top mounting plate (3) and the bottom supporting steel plate (5) are connected to form an L-shaped structure, the top mounting plate (3) is fixedly mounted on the waist beam (11) through a pre-buried corbel (2), and the end of the steel structure support (1) is placed on the bottom supporting steel plate (5).

3. The supporting structure for foundation pit steel support according to claim 2 is characterized in that: Side limit baffles (13) are installed on both sides of the bottom supporting steel plate (5). The bottom supporting steel plate (5), the two side limit baffles (13) and the top mounting plate (3) form a semi-enclosed structure with openings at the upper end and the inner end, so that the end of the steel structure support (1) can be placed on the bottom supporting steel plate (5) and located between the two side limit baffles (13) and the top mounting plate (3).

4. The supporting structure for foundation pit steel support according to claim 2 is characterized by: One end of the steel structure support (1) is fitted with the top mounting plate (3) of one set of steel support supporting components, and a length compensation plate (4) is filled between the other end of the steel structure support (1) and the top mounting plate (3) of another set of steel support supporting components.

5. The supporting structure for foundation pit steel support according to claim 1 or 4 is characterized in that: The length compensation plate (4) is composed of a plurality of superimposed plane plates, or the length compensation plate (4) is a wedge-shaped plate.

6. The supporting structure for foundation pit steel support according to claim 1 or 4 is characterized in that: One of the steel support and retaining components is fixedly installed on the cast-in-place piles (9) of the foundation pit through the pre-buried corbels (2), and the other steel support and retaining components is fixedly installed on the structural support piles (12) of the foundation pit through the pre-buried corbels (2).

7. The supporting structure for foundation pit steel support according to claim 6 is characterized by: The steel support bearing assembly also includes a sleeve support (6) and an inclined brace (7); the sleeve support (6) of one group of steel support bearing assemblies is pre-buried and installed on the cast-in-place pile (9), and the sleeve support (6) of another group of steel support bearing assemblies is pre-buried and installed on the structural support pile (12), and the inclined brace (7) is obliquely installed between the bottom supporting steel plate (5) and the sleeve support (6).

8. The supporting structure for foundation pit steel support according to claim 1 is characterized by: A U-shaped lifting ring is pre-buried on the waist beam (11).

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