Prestressed anti-floating structure tensioned in advance
Through the prestressed floating structure with advance tensioning, the force-transfer components connected by steel plates and steel bars are used to solve the leakage and rust problems in the construction of prestressed floating anchor cables, and the effect of simplifying the construction process and improving efficiency is achieved.
Patent Information
- Application Number
- CN202421842177.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-31
AI Technical Summary
There are problems such as leakage of basement floor plates, rust of anchor cables, complex construction nodes and difficulty in testing and rework during the existing prestressed anti-floating anchor cable construction, resulting in construction quality risks and slow progress.
The prestressed floating structure with advance tensioning is adopted, including prestressed anchor cables and force transmission members. The force transmission facilities are built on site and zipped in advance. The force transmission members are connected by steel plates and steel bars. They are poured in during the basement floor construction to avoid long-term exposure of prestressed anchor cables, simplifying the construction process and improving detection efficiency.
It effectively avoids anchor cord corrosion and bottom plate leakage, simplifies construction nodes, reduces costs, improves construction efficiency and quality, and ensures construction progress.
Smart Images
Figure CN223048097U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of basement building construction, and in particular to a prestressed anti-floating structure with advanced tensioning. Background Art
[0002] As cities develop, more and more basement space is utilized, and the basements are getting deeper and deeper. Affected by the groundwater level, prestressed anti-floating anchor cables are now widely used in construction projects to resist the buoyancy of groundwater on buildings.
[0003] In the existing construction method of using prestressed anti-floating anchor cables to resist the buoyancy of groundwater on buildings, the anti-floating anchor cables are first grouted, and a reserved pipe for passing the anchor cables is pre-buried on the tensioned anchor cables. When constructing the basement floor, a pre-buried box needs to be left on the surface at the anchor cable position for placing anchors during the later tensioning. Otherwise, the thickness of the basement floor decoration surface layer will increase. After the basement floor structure is completed and reaches a certain strength, it can be tensioned and locked through the floor structure. After locking, grouting is performed in the reserved pipe, and then the upper anchor is sealed with grouting material. This can easily cause leakage of the basement structure floor, and during the construction process, the anchor cables will be exposed for a long time and rust. It can be seen that the traditional construction method is prone to leakage of the basement floor, rust of anchor cables, complex construction nodes, and difficulty in rework if the anchor cable detection does not meet the requirements. Utility Model Content
[0004] The present application provides a prestressed anti-floating structure with advanced tensioning, which has convenient and simple overall construction and low construction cost. It can effectively solve the quality risks and complex nodes in traditional construction practices, speed up the construction progress and improve work efficiency.
[0005] The prestressed anti-floating structure provided by the present application comprises: a prestressed anchor cable extending vertically to the bottom of the basement floor, and a force transmission member pre-buried in the basement floor;
[0006] The force transmission component comprises: an upper steel plate and a lower steel plate; wherein,
[0007] A through hole for the prestressed anchor cable to pass through is provided between the upper steel plate and the lower steel plate, and an anchor for locking the prestressed anchor cable is installed at the top of the through hole of the upper steel plate;
[0008] A plurality of reinforcing ribs are circumferentially welded between the upper steel plate and the lower steel plate, and the plurality of reinforcing ribs are connected to the steel skeleton in the basement floor slab via hanger bars.
[0009] In this application, by fabricating on-site a force-transfer facility with pre-tensioning and locking, the force-transfer components are cast inside during the construction of the basement floor slab, avoiding the long-term exposure and corrosion of the prestressed anchor cables. At the same time, it avoids the leakage of the basement floor slab caused by the post-tensioning problem of the prestressed anchor cables. The force-transfer components are made of steel plates and steel bars, which is convenient and simple, with low construction costs, and can well solve the quality risks and complex joints existing in traditional construction practices, and can speed up the construction progress and improve work efficiency.
[0010] In a specific feasible implementation, a waterproof layer, a protective layer, and a concrete cushion are provided at the bottom of the basement floor slab. Through reasonable construction procedures, the waterproof performance of the basement building is ensured.
[0011] In a specific feasible implementation, anchoring holes extend vertically at the bottom of the basement floor slab, and the prestressed anchor cables are connected in a limited way in the anchoring holes. It provides stable support for the pre-tensioned prestressed anchor cables.
[0012] In a specific feasible implementation, a plurality of cable centering brackets for vertically positioning the prestressed anchor cables are arranged at intervals along the height direction in the anchoring holes. It increases the anti-floating effect and ensures the application of the pre-tensioning force.
[0013] In a specific feasible implementation, a cable grouting body is cast inside the anchoring holes. The prestressed anchor cables drill the anchoring holes according to the construction process, the prestressed anchor cables are fabricated and placed in the anchoring holes. After the cable centering brackets are installed, grouting is carried out. After the cable grouting body reaches 75% of the design strength, the fabricated force-transfer components are placed on the cable grouting body, and the anchor fittings are installed. Then, a qualified tensioning device is used for tensioning. After reaching the design requirements, it can be locked. Check whether the quality of the prestressed anchor cables meets the requirements. After passing the inspection, the force-transfer components and the prestressed anchor cables can be directly cast in the basement floor slab, avoiding the leakage caused by the penetration of the prestressed anchor cables through the basement floor slab in the traditional construction method, and also avoiding the corrosion caused by the long-term exposure of the prestressed anchor cables.
[0014] In a specific feasible implementation, the cross-section of the lower steel plate is larger than that of the upper steel plate. It improves the anti-buoyancy force and is convenient for obtaining materials.
[0015] In a specific feasible implementation, upper through-holes are provided on the upper steel plate, and lower through-holes are provided on the lower steel plate; among them,
[0016] The diameters of the upper through-holes and the lower through-holes are the same. The processing method is simple, and the upper through-holes and the lower through-holes are easy to process.
[0017] In a specific feasible implementation, the prestressed anchor cable is pre-tensioned and locked on the anchor fitting. The quality of the prestressed anchor cable can be detected in a timely manner. After passing the detection, the force transfer member and the prestressed anchor cable can be directly cast into the basement floor slab, avoiding leakage caused by the penetration of the prestressed anchor cable through the basement floor slab in the traditional construction method.
[0018] In a specific feasible implementation, the height of the force transfer member is less than the thickness of the basement floor slab. The force transfer member and the prestressed anchor cable are cast into the basement floor slab to avoid corrosion of the prestressed anchor cable caused by long-term exposure.
[0019] In a specific feasible implementation, the hanger bars are connected to the steel bar cage in an outward V shape from bottom to top. The stability of the connection is enhanced, and the anti-floating effect is further improved. Brief Description of the Drawings
[0020] Figure 1 Structural schematic diagram of the prestressed anti-floating structure with advanced tension provided by the embodiment of the present application;
[0021] Figure 2 Structural schematic diagram of the force transfer member provided by the embodiment of the present application;
[0022] Figure 3 Structural schematic diagram of the upper steel plate provided by the embodiment of the present application;
[0023] Figure 4 Structural schematic diagram of the lower steel plate provided by the embodiment of the present application.
[0024] Reference Numerals in the Drawings:
[0025] Upper steel plate - 1, Upper through hole - 101, Lower steel plate - 2, Lower through hole - 201, Anchor fitting - 4, Reinforcing rib - 3, Hanger bar - 5, Basement floor slab - 6, Waterproof layer - 7, Concrete cushion - 8, Anchor cable grouting body - 9, Prestressed anchor cable - 10, Anchor cable centering bracket - 11. Detailed Description of the Embodiments
[0026] To make the objectives, technical solutions, and advantages of the present disclosure clearer and more understandable, the present disclosure will be further described in detail below with reference to specific embodiments and the accompanying drawings.
[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of this specification should be understood by people with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar words used in one or more embodiments of this specification do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0028] In order to facilitate the understanding of the prestressed anti-floating structure provided in advance by the embodiment of the present application, its application scenario is first explained. In the existing construction method of using prestressed anti-floating anchor cables to resist the buoyancy brought by groundwater to buildings, the anti-floating anchor cables are first grouted, and a reserved pipe for passing the anchor cables is pre-buried on the tensioned anchor cables. When constructing the basement floor, a pre-buried box needs to be left on the surface at the anchor cable position for placing anchors during the later tensioning. Otherwise, the thickness of the basement floor decoration surface layer will increase. After the construction of the basement floor structure is completed and reaches a certain strength, it can be tensioned and locked through the floor structure. After locking, grouting is performed in the reserved pipe, and the upper anchor is sealed with grouting material. This can easily cause leakage of the basement structure floor, and during the construction process, the anchor cables will be exposed for a long time and rusted. It can be seen that the traditional construction method is prone to leakage of the basement floor, rust of anchor cables, complex construction nodes, and difficulty in rework if the anchor cable detection does not meet the requirements. In view of this, the present application provides a prestressed anti-floating structure with advanced tensioning, which is convenient and simple in overall construction and has low construction cost. It can effectively solve the quality risks and complex nodes in traditional construction practices, speed up the construction progress and improve work efficiency.
[0029] refer to Figure 1 The prestressed anti-floating structure provided by the embodiment of the present application includes: a prestressed anchor cable 10 vertically extending to the bottom of the basement floor 6, and a force transmission component pre-buried in the basement floor 6; the basement floor 6 in the present application is pre-dug with a foundation pit during the construction process, and a vertical hole is opened in the foundation pit for installing the prestressed anchor cable, and then a concrete cushion layer 8, a waterproof layer 7, and a protective layer are set at the bottom of the foundation pit, and the force transmission component is installed on the concrete cushion layer 8. Through reasonable construction procedures, the waterproof performance of the basement building is guaranteed.
[0030] Specifically, anchoring holes extend vertically from the bottom of the basement floor slab 6, and the prestressed anchor cables 10 are connected in a limited way in the anchoring holes to provide stable support for the pre-tensioned prestressed anchor cables 10. A plurality of cable centering brackets 11 for vertically positioning the prestressed anchor cables 10 are arranged at intervals along the height direction in the anchoring holes, which increases the anti-floating effect and ensures the application of the pre-tension force. The inside of the anchoring holes is filled with cable grouting bodies 9. During the installation and positioning of the prestressed anchor cables 10, the drilling of the anchoring holes is carried out according to the construction process. The prestressed anchor cables 10 are processed and placed in the anchoring holes. After the cable centering brackets 11 are installed, grouting is carried out. After the cable grouting bodies 9 reach 75% of the designed strength, the fabricated load transfer members are placed on the cable grouting bodies 9, and the anchor fittings 4 are installed. Then, a qualified tensioning device is used for tensioning. After reaching the design requirements, it can be locked. Check whether the quality of the prestressed anchor cables 10 meets the requirements. After passing the inspection, the load transfer members and the prestressed anchor cables 10 can be directly cast into the basement floor slab 6, avoiding leakage caused by the penetration of the prestressed anchor cables 10 through the basement floor slab 6 in the traditional construction method and also avoiding corrosion caused by the long-term exposure of the prestressed anchor cables 10.
[0031] Combined with Figure 2 As shown in the figure, the load transfer members in this application include: an upper steel plate 1 and a lower steel plate 2; wherein, a plurality of reinforcing ribs 3 are circumferentially welded between the upper steel plate 1 and the lower steel plate 2, and the plurality of reinforcing ribs 3 are connected to the steel bar framework in the basement floor slab 6 through suspension bars 5. The plurality of reinforcing ribs 3 in this application are welded between the upper steel plate 1 and the lower steel plate 2 in a circumferential arrangement. The thickness of the upper steel plate 1 and the lower steel plate 2 is 30 mm. The reinforcing ribs 3 are made of threaded steel bars with a diameter of 25 mm, cut according to the length requirements, and then welded by electric welding. In this way, a load transfer member is fabricated on-site.
[0032] Continuing to refer to Figure 3 and Figure 4 As shown in the figure, the cross-section of the lower steel plate 2 is larger than that of the upper steel plate 1, which improves the anti-floating force and is convenient for obtaining materials. In a specific embodiment of this application, the size of the upper steel plate 1 is a square steel plate of 220 mm × 220 mm. An upper through-hole 101 with a diameter of 93 mm is opened on the upper steel plate 1. And after the installation of the prestressed anchor cables 10 is completed, an anchor is fixedly installed in the upper through-hole 101. The prestressed anchor cables 10 are locked through the anchor fittings 4, and a qualified tensioning device is used for tensioning. After reaching the design requirements, it can be locked. Check whether the quality of the prestressed anchor cables 10 meets the requirements. The size of the lower steel plate 2 is a square steel plate of 240 mm × 240 mm. A lower through-hole 201 with a diameter of 93 mm is opened on the lower steel plate 2. The prestressed anchor cables 10 extend through the lower through-hole 201 into the anchor fittings 4 in the upper through-hole 101 for locking.
[0033] Combined with Figure 1As shown, the prestressed anchor cable 10 is pre-tensioned and locked on the anchor 4. The quality of the prestressed anchor cable 10 can be detected in time to see if it meets the requirements. After passing the inspection, the force transfer member and the prestressed anchor cable 10 can be directly cast into the basement floor slab 6, avoiding leakage caused by the penetration of the prestressed anchor cable 10 through the basement floor slab 6 in the traditional construction method. The height of the force transfer member is less than the thickness of the basement floor slab 6. The force transfer member and the prestressed anchor cable 10 are cast into the basement floor slab 6 to prevent the prestressed anchor cable 10 from rusting due to long-term exposure.
[0034] The suspension bar 5 is welded to the circumferentially distributed reinforcing bars 3. The suspension bar 5 is welded to the steel bar framework in an outward V shape from bottom to top to enhance the stability of the connection. There is an angle of at least 60° between each side of the suspension bar 5 and the horizontal steel bar framework, thus further improving the anti-floating effect.
[0035] In this application, by fabricating on-site and pre-tensioning and locking the force transfer facilities, when constructing the basement floor slab 6, the force transfer member is cast inside, preventing the prestressed anchor cable 10 from rusting due to long-term exposure and also preventing leakage of the basement floor slab 6 caused by post-tensioning problems of the prestressed anchor cable 10. The force transfer member is made of steel plates and steel bars, which is convenient, simple, and has a low construction cost. It can well solve the quality risks and complex joints existing in the traditional construction method, and can speed up the construction progress and improve work efficiency.
[0036] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; under the concept of the present disclosure, the technical features between the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of one or more embodiments of the present specification as above, which are not provided in detail for the sake of brevity.
[0037] In addition, for the sake of simplicity of explanation and discussion, and in order not to make one or more embodiments of the present specification difficult to understand, the well-known power / ground connections of other components may or may not be shown in the provided drawings. In addition, the device may be shown in block diagram form to avoid making one or more embodiments of the present specification difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices highly depend on the platform on which one or more embodiments of the present specification are to be implemented (i.e., these details should be fully within the understanding of those skilled in the art). In the case where specific details are set forth to describe the exemplary embodiments of the present disclosure, it is obvious to those skilled in the art that one or more embodiments of the present specification can be implemented without these specific details or with variations of these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.
[0038] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Accordingly, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification shall be included within the scope of protection of this disclosure.
Claims
1. A prestressed anti-floating structure with advanced tensioning, comprising a prestressed anchor cable extending vertically to the bottom of a basement floor, and a force transmission member pre-buried in the basement floor; characterized in that: The force transmission component comprises: an upper steel plate and a lower steel plate; wherein, A through hole for the prestressed anchor cable to pass through is provided between the upper steel plate and the lower steel plate, and an anchor for locking the prestressed anchor cable is installed at the top of the through hole of the upper steel plate; A plurality of reinforcing ribs are circumferentially welded between the upper steel plate and the lower steel plate, and the plurality of reinforcing ribs are connected to the steel skeleton in the basement floor slab via hanger bars.
2. The prestressed anti-floating structure according to claim 1 is characterized in that: The bottom of the basement floor is provided with a waterproof layer, a protective layer and a concrete cushion layer.
3. The prestressed anti-floating structure according to claim 2 is characterized in that: An anchor hole is vertically extended at the bottom of the basement floor, and the prestressed anchor cable is limit-connected in the anchor hole.
4. The prestressed anti-floating structure according to claim 3 is characterized in that: A plurality of anchor cable centering brackets for vertically positioning the prestressed anchor cable are arranged at intervals along the height direction of the anchor hole.
5. The prestressed anti-floating structure according to claim 4 is characterized in that: Anchor cable grouting is poured inside the anchor hole.
6. The prestressed anti-floating structure according to claim 1 is characterized in that: The cross section of the lower steel plate is larger than the cross section of the upper steel plate.
7. The prestressed anti-floating structure according to claim 6 is characterized in that: The upper steel plate is provided with an upper through hole, and the lower steel plate is provided with a lower through hole; wherein, The diameter of the upper through hole is the same as the diameter of the lower through hole.
8. The prestressed anti-floating structure according to claim 6 is characterized in that: The prestressed anchor cable is pre-tensioned and locked on the anchor.
9. The prestressed anti-floating structure according to claim 8 is characterized in that: The height of the force transmission member is smaller than the thickness of the basement floor.
10. The prestressed anti-floating structure according to claim 9, characterized in that: The suspension rod is connected to the steel bar skeleton in an outward-facing "X" shape from bottom to top.