Fabricated anchor cable anchorage device for side slope or foundation pit

Abstract

The utility model discloses an assembly type anchor cable anchorage device for a side slope or a foundation pit. The assembly type anchor cable anchorage device comprises a double-spliced channel steel beam, a web reinforcing plate, a full-length base plate, an anchor cable mounting unit and a surface layer steel bar. A plurality of anchor cable mounting drill holes are transversely formed in the side wall of the side slope or the foundation pit at intervals along the side wall; surface layer steel bars are laid on the side wall of the side slope or the foundation pit; a concrete layer is overlaid on the surface layer steel bars; the full-length base plate is arranged on a concrete layer of the surface layer reinforcing steel bars; the double-spliced channel steel beam is arranged on the full-length base plate; and the web reinforcing plate is mounted in a groove of the double-spliced steel channel beam. The device can effectively support the side slope and the side wall of the foundation pit, the supporting effect is reliable, layer-by-layer pouring is not needed in the whole supporting process, the maintenance time is effectively shortened, and the supporting efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of support technology, and in particular provides an assembled anchor cable anchor device for slopes or foundation pits. Background Art

[0002] As the excavation depth of foundation pits of modern urban buildings is getting deeper and deeper, prestressed anchor cables are widely used as a common support structure. The anchor head material is generally cast-in-place reinforced concrete and needs to be used in conjunction with support piles.

[0003] During the construction of concrete anchor heads, they are poured on site layer by layer within the preset excavation depth. Not only is the construction volume large, but the anchor heads are heavy and rigid, the anchor head materials cannot be reused, the installation and removal work is large, and it is not possible to support them as they are excavated. Moreover, the curing time after pouring layer by layer is long, which is not conducive to controlling the deformation of the foundation pit. After the main structure of the basement is completed, when it is necessary to remove the reinforced concrete anchor head components, the construction work surface is narrow, and there are difficulties in noise and dust pollution, transportation of slag, and secondary treatment of abandoned blocks.

[0004] The existing assembled anchor components are as follows:

[0005] 1) CN201910064980.4 discloses an assembled anchor and an operating method. The anchor has a simple structure and is anti-falling, and is easy to install under different installation conditions. The clamping blocks on both sides of the wedge block and the carbon fiber plate limit the left and right movements of the two, thereby achieving the effects of anti-falling, anti-damage caused by stress concentration, reduced processing difficulty, and adjustable anchor. However, the anchor is only suitable for prestressed carbon fiber plate structures, and is mainly used for reinforcement and upgrading of building concrete. It cannot be used for internal support of foundation pits, and the actual construction process is not disclosed, so it is impossible to effectively solve the above technical problems.

[0006] 2) The construction method of channel steel anchor cables in the foundation pit support system disclosed in CN202010283757.1, in which the channel steel structure used is arranged in a tic-tac-toe form on the side wall of the foundation pit, and the anchor cables are installed at the intersection points of the channel steels to obtain the force required for the foundation pit support. However, the structure uses channel steel plates as a reaction force device for the anchor cables, and the reaction force that can be provided is limited. The channel steel plates are easily damaged by the prestressed bending of the anchor cables, and the need for layer-by-layer construction cannot be achieved, which makes the operation inconvenient.

[0007] 3) The overall top plate support structure and method disclosed in CN202110659415.X is a structure in which only one layer of channel steel is arranged on the anchor cable hole, and multiple channel steels connected to the anchor cable holes are pin-connected. In order to achieve a better recycling effect, a higher service life is abandoned. The connection reliability of the structure after installation is low, and it is not suitable for use in foundation pits with high support force requirements.

[0008] The existing assembled anchors have the following problems:

[0009] 1) The above existing structures are difficult to process, costly, and have a long processing cycle. When used for support, a large amount of anchors are required, which affects the construction progress;

[0010] 2) The above anchor structure is not suitable for foundation pits or slopes. Directly using the above structure to support slopes and foundation pits has high support risks and inconvenient operation. For example, CN201910064980.4 discloses an assembled anchor and operation method. This anchor is only suitable for prestressed carbon fiber plate structures, and is mainly used for reinforcement and upgrading of building concrete. It cannot be used for internal support of foundation pits. CN202010283757.1 uses channel steel plates as anchor reaction devices, which can provide limited reaction forces. The channel steel plates are easily damaged by the prestressed bending of the anchor cables, and the needs of layer-by-layer construction cannot be met, which is inconvenient to operate. The anchor cables and channel steel beams disclosed in CN202110659415.X are cross-connected with circular connecting plates to form an overall top plate support structure and method. The connection reliability after installation is low and it is not suitable for use in foundation pits with high support force requirements.

[0011] The information disclosed in the background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0012] In response to the above technical problems, the present application provides an assembled anchor cable anchor device for slopes or foundation pits. The system can solve the problems of high construction cost, large construction volume and environmental damage of existing concrete anchor heads in the process of foundation pit support and slope support. In addition, the anchor is low in cost and can effectively utilize the terrain characteristics of the foundation pit or slope to obtain multiple support points. It is easy to operate and has low difficulty in promotion. The system provided in the present application includes an assembled anchor cable reinforcement structure, a reinforcement structure support member, a web reinforcement measure, etc. The system can set different web reinforcement plates according to the required prestressed anchor cables, and can be used in support scenarios of prestressed cables of 80t and below. The structure is flexible and convenient, and there is no limit on the support excavation depth.

[0013] The present application provides an assembled anchor cable anchor device for a slope or foundation pit, comprising: a double-jointed channel steel beam, a web reinforcement plate, a full-length pad, an anchor cable installation unit, and a surface layer steel bar;

[0014] A plurality of anchor cable installation holes are provided at intervals along the side wall of the slope or foundation pit; surface steel bars are laid on the side wall of the slope or foundation pit; a concrete layer is stacked on the surface steel bars; a full-length pad is arranged on the concrete layer of the surface steel bars; a double-jointed channel steel beam is arranged on the full-length pad; and a web reinforcement plate is installed in the groove of the double-jointed channel steel beam;

[0015] The anchor cable channel passes through the double-jointed channel steel beam, the full-length pad, the surface steel bar, the concrete layer, the anchor cable installation unit and the anchor cable installation drill hole; one end of the anchor cable is installed in the anchor cable installation drill hole;

[0016] The anchor cable installation unit includes: a bottom pad 5, an anchor head pressure plate 3, an assembled lock 4, and multiple soil nails; the soil nails are inserted into the side wall of the slope or foundation pit and are arranged on both sides of the anchor cable installation drill hole; the top of the soil nails extends out of the side wall of the slope or foundation pit and is welded to the full-length pad; the bottom pad is clamped between the full-length pad and the double-jointed channel steel beam; the anchor head pressure plate cover is arranged on the anchor cable channel of the double-jointed channel steel beam; the protruding end of the anchor cable is tensioned by the assembled lock.

[0017] Preferably, it includes: a plurality of L-shaped support steels; one end of the L-shaped support steel is welded to the upper edge of the double-jointed channel steel beam; the other side of the L-shaped support steel is welded to the top of the soil nails inserted into the side wall of the slope or foundation pit.

[0018] Preferably, the L-shaped support steels are arranged at intervals laterally along the side wall of the slope or foundation pit.

[0019] Preferably, it comprises: a plurality of tie bars; the tie bars are inserted into the side walls of the slope or foundation pit, and the protruding ends of the tie bars are welded to the bottom edge of the full-length pad.

[0020] Preferably, a plurality of tie bars are arranged at intervals laterally along the side wall of the slope or foundation pit.

[0021] Preferably, soil nails are arranged above and below the anchor cable installation hole.

[0022] Preferably, the size of the bottom pad is the same as the size of the base of the double-jointed channel steel beam.

[0023] Preferably, the double-piece channel steel beam comprises: a first channel steel and a second channel steel; the planar side wall of the first channel steel is aligned with the planar side wall of the second channel steel; the channel body of the first channel steel faces outward, and the web reinforcement plate is accommodated in the channel body surface; the channel body of the second channel steel faces outward, and the web reinforcement plate is accommodated in the channel body surface.

[0024] The beneficial effects of this application include:

[0025] 1) The present application provides an assembled anchor cable anchor device for slopes or foundation pits. The device obtains a fixed support by welding soil nails and a full-length pad. The double-jointed channel steel beam is welded to the fixed support, which can prevent the double-jointed steel waist beam from falling off before the anchor cable is tensioned. After the anchor cable is tensioned, the double-jointed steel waist beam with a web reinforcement plate welded thereto is used to lock the double-jointed steel waist beam. This method has high construction efficiency and the resulting structure meets the engineering support needs of foundation pits and slopes. The resulting prestressed anchor cable support structure can be used to support slopes and foundation pits.

[0026] 2) The assembled anchor cable and anchor device for slopes or foundation pits provided in this application is a reliable, safe, feasible and fast anchor cable prestressed construction solution, which can achieve green construction, speed up construction efficiency, reduce construction costs and obtain higher economic benefits. The results of the invention have also been successfully applied in engineering practice. Therefore, this release will have wide use value and guiding significance.

[0027] 3) The assembled anchor cable anchor device for slopes or foundation pits provided in this application can achieve effective support for slopes and foundation pit side walls, with reliable support effect. The entire support process does not require layer-by-layer pouring, effectively shortening the maintenance time and improving the support efficiency. At the same time, by setting up a spliced ​​double-slot steel beam, it can provide the tensioning force required for anchor cable tensioning, and at the same time, it can be recycled and reused after the support is completed, reducing the support cost. And the device can be used for prestressed support scenarios of 80t level and below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a front and cross-sectional structure of a double-jointed channel steel beam structure in at least one embodiment provided in the present application;

[0029] Figure 2 A schematic diagram of a partially enlarged structure of a full-length pad in at least one embodiment provided in the present application;

[0030] Figure 3 A schematic diagram of a partially enlarged structure of a bottom pad in at least one embodiment provided in the present application;

[0031] Legend:

[0032] Double-jointed channel steel beam 1, web reinforcement plate 2, anchor head pressure plate 3, assembled lock 4, bottom pad 5, full-length pad 6, soil nails 7, L-shaped support steel 8, tensioning rod 9, anchor cable channel 31, support pad 32. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0035] The technical means that are not described in detail in this application and are not used to solve the technical problems of this application are all set according to the common knowledge in the field, and can be implemented in a variety of common knowledge settings.

[0036] See also Figures 1 to 3 The present application provides an assembled anchor cable anchor device for a slope or foundation pit. The device is provided with an anchored soil layer on the slope surface of the excavated foundation pit, and multiple soil nails 7 are anchored in the anchored soil layer. The multiple soil nails 7 are arranged at intervals along the slope surface. The top of the soil nails 7 extends out of the slope surface and is welded to the surface layer steel bars. Then, the top of the surface layer steel bars is connected to the full-length pad 6 through welding, thereby forming a stable support. The support field in the present application includes: slope or foundation pit.

[0037] An anchor cable channel 31 is reserved on the full-length pad 6, and the channel size can be designed according to the anchor cable diameter; a bottom pad 5 is welded on the full-length pad 6, and the bottom pad 5 is consistent with the width of the double-jointed channel steel beam 1. An anchor cable channel 31 is reserved on the bottom pad 5, and the size of the anchor cable channel 31 is designed according to the anchor cable diameter; the base of the double-jointed channel steel beam 1 is welded to the bottom pad 5, and when the double-jointed channel steel beam 1 is welded to the bottom pad 5, an anchor cable channel 31 is reserved between the double-jointed channel steel beams 1, and the channel size is designed according to the anchor cable diameter, and a reinforcing plate 2 is welded to the web of the double-jointed channel steel beam 1; an anchor head pressure plate 3 is arranged on the top of the double-jointed channel steel beam 1, and the anchor head pressure plate 3 is connected to the double-jointed channel steel beam 1 through an anchor cable, and an anchor cable channel 31 is opened on the anchor head pressure plate 3. After the anchor cable is inserted into the anchor cable channel 31 and installed, the installation end extends out of the double-jointed channel steel beam 1 and is locked by an assembled lock 4. The device is used in conjunction with a soil nail wall.

[0038] In a specific embodiment, to increase stability, it includes: L-shaped support steel 8; one end of the L-shaped support steel 8 is connected to the top of the upper double-jointed channel steel beam 1, and the other end is welded to the top of the soil nail 7 inserted on the slope surface, and multiple soil nails 7 are arranged at intervals along the soil slope to provide multiple support connection points for the L-shaped support steel 8. The upper part of the anchor cable anchor is welded to the soil nail wall system through the L-shaped support steel 8.

[0039] In a specific embodiment, it includes: a plurality of tie bars 9; the plurality of tie bars 9 are inserted into the slope surface at intervals along the slope surface, and the tops extend out of the slope surface and are welded to the bottom of the full-length pad 6 to provide more support for the full-length pad 6. The extended ends of the tie bars 9 can also abut against the bottom of the double-jointed channel steel beam 1, thereby providing reliable support for the entire device.

[0040] In a specific embodiment, it includes: a plurality of support pads 32; support pads 32 are arranged in diameter between any two adjacent bottom pads 5 to provide the required support plane for the double-jointed channel steel beam.

[0041] In a specific embodiment, the double-jointed channel steel beam 1 includes: a first channel steel and a second channel steel, the plane of the first channel steel is spaced apart from the plane of the second channel steel, the channel body of the first channel steel is arranged outward, and the channel body of the second channel steel is arranged outward.

[0042] In a specific embodiment, a plurality of anchor head pressure plates 3 are arranged at intervals on the top surface of the double-jointed channel steel beam 1. A plurality of anchor cable insertion openings are arranged in the anchor cable passage 31 on the anchor head pressure plate 3, so as to realize the installation and tensioning of anchor cables at a plurality of anchor cable installation points on the slope.

[0043] In a specific embodiment, a plurality of bottom plates 5 are arranged at intervals on the bottom surface of the double-jointed channel steel beam 1 .

[0044] The construction process of the device includes the following steps:

[0045] Step S1: Anchor cable installation holes are opened on the side wall of the slope or foundation pit, and soil nails are anchored in the soil layer of the side wall of the slope or foundation pit. The top of the soil nail extends out of the soil layer and is welded to the surface steel bars. The full-length pad is welded to the surface steel bars to obtain a firmly installed fixed support. The bottom pad is used to fine-tune the position according to the installation position requirements to realize the interconnection of the anchor cable channels on each component. The base of the double-jointed channel steel beam is welded to the bottom pad, and an anchor cable channel is set on the anchor head pressure plate. The anchor cable passes through the anchor cable channel and extends out of the anchor head pressure plate. The protruding end of the anchor cable is locked on the double-jointed channel steel beam by an assembled lock.

[0046] In a specific embodiment, soil nails are first constructed. During the soil nail construction, holes are drilled and grouting is performed on the slope or the side wall of the foundation pit by a drilling machine. The size of the holes is determined according to the size of the soil nails and the friction resistance of the side wall of the soil layer. At the same time, anchor holes are drilled and grouting is performed according to the anchor cable position and the designed anchor hole size.

[0047] Step S2: laying a surface steel mesh on the slope or the side wall of the foundation pit, and welding the soil nails that have been completed and have reached the required strength to the surface steel mesh;

[0048] Step S2: A full-length pad and surface steel bars are welded on top of the position where the anchor cable is to be set, an anchor cable channel is reserved on the full-length pad directly opposite the anchor cable setting position, and a hole is drilled through the full-length pad for the anchor cable channel, and the hole size is determined according to the diameter of the anchor cable; the full-length pad should be effectively connected to the surface steel bar surface, especially before the anchor cable is tensioned and locked, to prevent the steel waist beam from falling off;

[0049] Step S4: at the anchor cable setting position, a bottom plate with a size corresponding to that of the double-jointed groove steel beam is set, the bottom plate is covered on the top surface of the double-jointed groove and covers the anchor cable channel on the double-jointed groove, and an anchor cable channel is reserved at the position corresponding to the anchor cable on the bottom plate;

[0050] Step S5: welding the double-jointed channel steel beam with the reserved anchor cable channel on the bottom pad, and welding the web reinforcement plate at the web position of the double-jointed channel steel beam to prevent the double-jointed steel waist beam from being eccentrically compressed;

[0051] Step S6: An anchor head pressure plate is welded on the top surface of the double-jointed channel steel beam, an anchor cable channel is set on the anchor head pressure plate, and anchor cable construction is carried out. The anchor cable is inserted into the anchor cable channel and extends out of the anchor head pressure plate to complete the tensioning and locking of the anchor cable through the assembled lock.

[0052] In a specific embodiment, the device can be used in conjunction with a soil nail wall. To increase stability, an L-shaped steel can be arranged below the full-length pad, and the anchor cable anchor can be welded to the soil nail wall system through tension bars.

[0053] In a specific embodiment, the double steel waist beam is made of channel steel, which is easy to construct and has been maturely used in the fields of foundation pit support and slope support;

[0054] In a specific embodiment, each steel plate in the device is made of A3 steel, and the steel can be recycled after the foundation pit support construction is completed, saving construction costs;

[0055] In a specific embodiment, the thickness of the steel plates used to make each component is 20 mm.

[0056] In a specific embodiment, the height of each weld should not be less than 8 mm to ensure the safety and reliability of the device during installation.

[0057] In a specific embodiment, the recovery method of the device comprises the following steps:

[0058] After the support is completed, after removing the assembled locks and loosening the anchor cables, remove the connection points between the full-length pad and the surface steel bars, and remove the anchor head pressure plate, double-jointed channel steel beam, bottom pad, and full-length pad that are welded together.

[0059] This method can realize the recycling and reuse of steel bar components and provide the required supporting force during the support process.

[0060] When the device is used to support and install anchor cables, the anchor cables are safe and reliable.

[0061] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled anchor cable anchor device for slopes or foundation pits, characterized in that: include: Double-jointed channel steel beam, web reinforcement plate, full-length pad, anchor cable installation unit, surface reinforcement; A plurality of anchor cable installation holes are provided at intervals along the side wall of the slope or foundation pit; surface steel bars are laid on the side wall of the slope or foundation pit; a concrete layer is stacked on the surface steel bars; a full-length pad is arranged on the concrete layer of the surface steel bars; a double-jointed channel steel beam is arranged on the full-length pad; and a web reinforcement plate is installed in the groove of the double-jointed channel steel beam; The anchor cable channel passes through the double-jointed channel steel beam, the full-length pad, the surface steel bar, the concrete layer, the anchor cable installation unit and the anchor cable installation drill hole; one end of the anchor cable is installed in the anchor cable installation drill hole; The anchor cable installation unit includes: a bottom pad, an anchor head pressure plate, an assembled lock, and multiple soil nails; The soil nails are inserted into the side wall of the slope or foundation pit and are arranged on both sides of the anchor cable installation drill hole; the top of the soil nails extends out of the side wall of the slope or foundation pit and is welded to the full-length pad; the bottom pad is clamped between the full-length pad and the double-jointed channel steel beam; the anchor head pressure plate cover is arranged on the anchor cable channel of the double-jointed channel steel beam; the protruding end of the anchor cable is tensioned by an assembled lock.

2. The assembled anchor cable anchor device for slope or foundation pit according to claim 1, characterized in that: include: Multiple L-shaped support steels; One end of the L-shaped support steel is welded to the upper edge of the double-jointed channel steel beam; the other side of the L-shaped support steel is welded to the top of the soil nails inserted into the side wall of the slope or foundation pit.

3. The assembled anchor cable anchor device for slope or foundation pit according to claim 2, characterized in that: The L-shaped support steels are arranged at intervals laterally along the side walls of the slope or foundation pit.

4. The assembled anchor cable anchor device for slope or foundation pit according to claim 1, characterized in that: include: A plurality of tie bars; the tie bars are inserted into the side walls of the slope or foundation pit, and the protruding ends of the tie bars are welded to the bottom edge of the full-length pad.

5. The assembled anchor cable anchor device for slope or foundation pit according to claim 1, characterized in that: A plurality of tie bars are arranged at laterally intervals along the side wall of the slope or foundation pit.

6. The assembled anchor cable anchor device for slope or foundation pit according to claim 1, characterized in that: Soil nails are arranged above and below the anchor cable installation holes.

7. The assembled anchor cable anchor device for slope or foundation pit according to claim 1, characterized in that: The size of the bottom pad is the same as the base size of the double-jointed channel steel beam.

8. The assembled anchor cable anchor device for slope or foundation pit according to claim 1, characterized in that: The double-jointed channel steel beam includes: a first channel steel and a second channel steel; the plane side wall of the first channel steel is aligned with the plane side wall of the second channel steel; the channel body of the first channel steel faces outward, and the web reinforcement plate is accommodated in the channel body surface; the channel body of the second channel steel faces outward, and the web reinforcement plate is accommodated in the channel body surface.

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