Diagonal bracing pile structure in foundation pit support system
By designing the oblique pile structure of the horizontal and vertical connection beams in the base pit encirclement system, the problem of insufficient steel -benting ability of the steel slope is solved, which significantly improves the strength and safety performance of the bending. Soil and soil pressure environment.
Patent Information
- Application Number
- CN202421116245.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The inclined pile structure in the existing foundation pit enclosure system has insufficient bending ability of the steel inclined pile structure in the case of large excavation depth of the foundation pit or large soil and water pressure, which poses safety hazards.
Design a slanting pile structure including horizontal and vertical connecting beams, and the first connection beam and multiple horizontal connecting two adjacent connections through multiple horizontal connecting pits and steel slopes through multiple horizontal pits and steel slopes. The second connection beam of the beam, and the auxiliary vertical support piles of the first connection beam or the second connection beam, forming a solid support for steel oblique support.
This structure can significantly improve the anti -bending strength of the steel oblique support, provide more stable horizontal and vertical support, improve the safety performance of the foundation pit encirclement system, and is suitable for the condition of deep -founded pits and large water and soil pressure.
Smart Images
Figure CN222413048U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of foundation construction, in particular to an inclined support pile structure in a foundation pit retaining system. Background Art
[0002] In recent years, the diagonal brace pile structure in the foundation pit retaining system has been widely used and promoted. The diagonal brace pile structure is such as the top beam of the vertical foundation pit retaining pile row connected to the top of the diagonal brace pile. The diagonal brace pile generally includes steel diagonal braces above the foundation pit floor, such as steel lattice column diagonal braces or steel pipe diagonal braces, and diagonal piles below the foundation pit floor composed of core piles covered with concrete, such as steel lattice columns, steel pipe piles and high-pressure jet grouting piles wrapped outside.
[0003] However, the diagonal brace pile structure in the foundation pit retaining system of the prior art still has the following deficiencies: generally, there are only diagonal brace piles. If there are certain occasions, such as when the foundation pit excavation depth is large, that is, when used for supporting deep foundation pits, or when the water and soil pressure outside the foundation pit retaining piles is large, the bending resistance of the steel diagonal brace exposed outside the foundation pit bottom plate will be obviously insufficient, leaving safety hazards. Although some have added vertical auxiliary supports, and some have added horizontal auxiliary supports between the steel diagonal brace and the foundation pit retaining piles, they still do not form a stable support force for the steel diagonal brace, and the steel diagonal brace still does not have a high bending strength, leaving safety hazards. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a diagonal brace pile structure in a foundation pit retaining system which can provide a stable horizontal and vertical supporting force for a steel diagonal brace and enable the steel diagonal brace to have a higher bending strength.
[0005] The technical solution of the utility model is to provide a diagonal bracing pile structure in a foundation pit retaining system, comprising a diagonal bracing pile whose top end is fixed to a capping beam at the top of a vertical foundation pit retaining pile row and whose bottom end is fixed in the soil below the bottom surface of the foundation pit, and the portion of the diagonal bracing pile above the bottom surface of the foundation pit is a steel diagonal brace; the diagonal bracing pile structure in the foundation pit retaining system also includes a plurality of first connecting beams transversely connecting the foundation pit retaining pile row and each steel diagonal brace and a plurality of second connecting beams transversely connecting two adjacent first connecting beams; the diagonal bracing pile structure in the foundation pit retaining system also includes a plurality of auxiliary vertical bracing piles supporting the first steel connecting beams or supporting the second steel connecting beams.
[0006] After adopting the above structure, the inclined brace pile structure in the foundation pit retaining system of the utility model has the following advantages: since the inclined brace pile structure in the foundation pit retaining system also includes a plurality of first connecting beams that laterally connect the foundation pit retaining piles and each steel inclined brace, a plurality of second connecting beams that laterally connect two adjacent first connecting beams, and a plurality of auxiliary vertical brace piles that support the first connecting beams or the second steel connecting beams, it can provide a lateral and vertical stable support force for the steel inclined brace, so that the steel inclined brace has a higher bending strength, and is particularly suitable for occasions with a large foundation pit excavation depth, that is, for the support of deep foundation pits, and for situations where the water and soil pressure outside the foundation pit retaining piles is large, which greatly improves the safety performance of the inclined brace pile structure in the foundation pit retaining system.
[0007] Furthermore, the diagonal bracing pile structure in the foundation pit retaining system further includes a plurality of third connecting beams arranged in parallel with the second connecting beams and fixed to the foundation pit retaining piles; the first connecting beam, the second connecting beam and the third connecting beam are all reinforced concrete connecting beams; the plurality of first reinforced concrete connecting beams, the plurality of second reinforced concrete connecting beams and the plurality of third reinforced concrete connecting beams constitute a transverse reinforced concrete support frame extending along the foundation pit retaining piles. With the above structure, the steel diagonal bracing can be further provided with a stable supporting force in the transverse and vertical direction, so that the steel diagonal bracing has a higher bending strength.
[0008] Furthermore, the transverse reinforced concrete support frame is arranged horizontally. After adopting the above structure, the reinforced concrete support frame has better mechanical properties and can further provide a transverse and stable support force for the steel diagonal brace, so that the steel diagonal brace has a higher bending strength.
[0009] Furthermore, the auxiliary vertical support piles include vertical steel supports above the bottom surface of the foundation pit and vertical piles fixed in the soil below the bottom surface of the foundation pit. After adopting the above structure, the auxiliary vertical support pile structure is more solid, which can further provide vertical and stable support force for the steel diagonal brace, so that the steel diagonal brace has higher bending strength.
[0010] Furthermore, the auxiliary vertical support piles are vertical support piles. After the auxiliary vertical support piles adopt the above specific structure, they can further provide vertical and stable support force for the steel diagonal brace, so that the steel diagonal brace has higher bending strength.
[0011] Furthermore, the auxiliary vertical support piles are inclined support piles with the same inclination direction as the steel diagonal support. After the auxiliary vertical support piles adopt the above another specific structure, their mechanical properties are better, and they can further provide vertical and stable support force for the steel diagonal support, so that the steel diagonal support has higher bending strength.
[0012] Furthermore, the angle between the upward extension line of the central axis of each diagonal support pile and the upward extension line of the central axis of the foundation pit retaining pile connected via the first connecting beam is 25°-35°. After the angles between the diagonal support pile and the upward extension lines of the central axis of the foundation pit retaining pile are adopted as the above specific angles, the mechanical properties are better, and the vertical stable support force is further provided to the steel diagonal support, so that the steel diagonal support has higher bending strength. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the inclined support pile structure of the utility model, that is, when the auxiliary vertical support piles adopt vertical support piles.
[0014] Figure 2 yes Figure 1 Schematic diagram of the side view structure in.
[0015] Figure 3 yes Figure 2 Schematic diagram of the structure after removing the soil.
[0016] Figure 4 It is a three-dimensional structural schematic diagram of another embodiment of the inclined support pile structure of the utility model, that is, when the auxiliary vertical support piles adopt inclined support piles.
[0017] Figure 5 yes Figure 1 Schematic diagram of the side view structure in.
[0018] Figure 6 yes Figure 5 Schematic diagram of the structure after removing the soil.
[0019] As shown in the figure:
[0020] 1. Pit retaining piles, 11. Pit retaining piles, 111. Upward extension line of the central axis of the pit retaining piles, 12. Top beam, 121. Corbel;
[0021] 2. Soil, 21. Bottom of foundation pit;
[0022] 3. diagonal bracing piles, 31. steel diagonal bracing, 32. diagonal piles;
[0023] 4. transverse steel support frame, 41. first reinforced concrete connecting beam, 42. second reinforced concrete connecting beam, 43. third reinforced concrete connecting beam;
[0024] 5. Auxiliary vertical support piles, 51. Vertical support piles, 511. Vertical steel support, 512. Vertical piles, 52. Diagonal support piles, 521. Diagonal steel support, 522. Diagonal piles, 523. Upward extension line of the central axis of the diagonal support piles. DETAILED DESCRIPTION
[0025] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these specific implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each specific implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 shown.
[0027] The inclined brace pile structure in the foundation pit retaining system of the utility model includes an inclined brace pile 3 whose top end is fixed to the top beam 12 at the top of the vertical foundation pit retaining pile row 1 and whose bottom end is fixed to the soil 2 below the foundation pit bottom surface 21. The part of the inclined brace pile 3 above the foundation pit bottom surface 21 is a steel inclined brace 31. The top of the steel inclined brace 31 is generally fixed to the top beam 12 through a corbel 121 such as a steel corbel. The steel inclined brace 31 is, for example, a steel lattice column inclined brace or a steel pipe inclined brace. The bottom end or part of the inclined brace pile 3 fixed to the soil 2 below the foundation pit bottom surface 21 is an inclined pile 32, which is generally an inclined pile 32 composed of a core pile coated with concrete or concrete, such as a steel lattice column or a steel pipe pile and a high-pressure rotary jet pile coated outside; of course, it can also be an inclined pile 32 composed of a composite pile connected to a steel lattice column and a prefabricated square pile. The steel inclined brace 31 is coaxially welded and fixed with the core pile. It is not difficult to understand that the foundation pit retaining pile row 1 is composed of a plurality of foundation pit retaining piles 11. The angle between the upward extension line of the central axis of the steel diagonal brace 31 of each diagonal brace pile 3 and the upward extension line 111 of the central axis of the corresponding foundation pit retaining pile is generally 40°-50°, such as 45°. The foundation pit bottom surface 21 is also called the foundation pit bottom plate. The foundation pit retaining piles 11 are also called support piles. The above is the prior art.
[0028] The inventive points of the utility model are as follows.
[0029] The inclined bracing pile structure in the foundation pit retaining system of the present invention further includes a plurality of first connecting beams that transversely connect the foundation pit retaining pile row 1 and each steel diagonal brace 31 and a plurality of second connecting beams that transversely connect two adjacent first connecting beams. The inclined bracing pile structure in the foundation pit retaining system of the present invention further includes a plurality of auxiliary vertical bracing piles 5 that support the first connecting beam or the second connecting beam. The auxiliary vertical bracing piles 5 generally support the first connecting beam, that is, the auxiliary vertical bracing piles 5 are generally connected to the bottom surface of the first connecting beam, that is, fixed.
[0030] The inclined support pile structure in the foundation pit retaining system of the utility model further comprises a plurality of third connection beams which are arranged in parallel with the second connection beams and fixed to the foundation pit retaining pile rows 1 .
[0031] The first connecting beam, the second connecting beam and the third connecting beam are preferably reinforced concrete connecting beams. A plurality of first reinforced concrete connecting beams 41, a plurality of second reinforced concrete connecting beams 42 and a plurality of third reinforced concrete connecting beams 43 form a transverse reinforced concrete support frame 4 extending along the foundation pit retaining pile row. It is not difficult to understand that the reinforced concrete connecting beam is also called a reinforced concrete connecting beam, that is, the first reinforced concrete connecting beam, the second reinforced concrete connecting beam and the third reinforced concrete connecting beam. The transverse reinforced concrete support frame 4 is also called a reinforced concrete support frame.
[0032] The transverse reinforced concrete support frame 4 is preferably arranged horizontally, that is, a horizontal reinforced concrete support frame 4 is preferably used.
[0033] The auxiliary vertical support piles 5 include vertical steel supports above the bottom surface 21 of the foundation pit and vertical piles fixed in the soil 2 below the bottom surface 21 of the foundation pit. It is not difficult to understand that the vertical piles can be vertical piles composed of core piles covered with concrete, i.e., concrete; or they can be vertical piles composed of composite piles in which steel lattice columns and prefabricated square piles are connected. The vertical steel supports are welded and fixed coaxially with the core piles. If the vertical steel supports are steel lattice columns and the vertical piles are composite piles in which steel lattice columns and prefabricated square piles are connected, an integral steel lattice column can be used. If the vertical steel supports are steel pipes and the vertical piles are composite piles in which steel lattice columns and prefabricated square piles are connected, the steel pipes are welded and fixed coaxially with the steel lattice columns.
[0034] The auxiliary vertical support pile 5 can be a vertical support pile 51. It is not difficult to understand that the vertical steel support of the vertical support pile 51 is a vertical steel support 511, and the vertical pile of the vertical support pile 51 is a vertical pile 512.
[0035] Vertical is also called vertical.
[0036] The auxiliary vertical support piles 5 are preferably oblique support piles 52 having the same inclination direction as the steel oblique support 31. It is easy to understand that the vertical steel support of the oblique support piles 52 is the oblique steel support 521, and the vertical pile of the oblique support piles 52 is the oblique pile 522.
[0037] The angle between the upward extension line 523 of the central axis of each oblique support pile and the upward extension line 111 of the central axis of the foundation pit retaining pile connected via the first connecting beam such as the first reinforced concrete connecting beam 41 is 25°-35°, such as 30°.
[0038] The multiple piles mentioned above, namely, the multiple foundation pit retaining piles 11, the multiple first connecting beams such as the multiple first reinforced concrete connecting beams 41, the multiple second connecting beams such as the multiple second reinforced concrete connecting beams 42, the multiple third connecting beams such as the multiple third reinforced concrete connecting beams 43, and the multiple auxiliary vertical support piles 5, can all be dozens, hundreds, thousands, hundreds, and dozens, etc., and can also be called a plurality of piles.
[0039] It is not difficult to understand that the transverse reinforced concrete support frame 4 can be fixed to the surface of the steel foundation pit retaining pile 11 body by welding with reserved steel bars or fixed to the reserved steel bars of the reinforced concrete foundation pit retaining pile 11 by welding with reserved steel bars of the transverse reinforced concrete support frame 4 before pouring concrete. The transverse reinforced concrete support frame 4 can be fixed to the top of the vertical steel support of the auxiliary vertical support pile 5 by welding with reserved steel bars before pouring concrete.
[0040] Of course, the first connecting beam, the second connecting beam and the third connecting beam can also be the first steel connecting beam, the second steel connecting beam and the third steel connecting beam. The first steel connecting beam, the second steel connecting beam and the third steel connecting beam can be welded and fixed to each other to form a steel support frame. The first steel connecting beam and the third steel connecting beam can be welded and fixed to the foundation pit retaining piles: welded and fixed to the surface of the steel foundation pit retaining pile body or welded and fixed to the reserved steel bars of the reinforced concrete foundation pit retaining piles. The outer end of the first steel connecting beam can have a hole, such as an oblique hole, through which the steel diagonal brace is passed, or a notch, such as an oblique notch, which is engaged with the steel diagonal brace and then welded and fixed. The bottom surface of the first steel connecting beam can be welded and fixed to the top of the vertical steel brace of the auxiliary vertical support pile, such as the vertical steel brace or the oblique steel brace.
[0041] The above unmarked parts, structures or quantities are not shown in the drawings; some parts are not marked in the drawings. The drawings are only for reference. If there is any inconsistency between the drawings and the text description or between the drawings, the text description shall prevail.
[0042] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A diagonal brace pile structure in a foundation pit retaining system, comprising a diagonal brace pile whose top end is fixed to a capping beam at the top of a vertical foundation pit retaining pile row and whose bottom end is fixed to the soil below the bottom surface of the foundation pit, and the part of the diagonal brace pile above the bottom surface of the foundation pit is a steel diagonal brace; characterized in that: It also includes a plurality of first connecting beams that transversely connect the foundation pit retaining piles and each steel diagonal brace and a plurality of second connecting beams that transversely connect two adjacent first connecting beams; it also includes a plurality of auxiliary vertical supporting piles that support the first connecting beams or the second connecting beams.
2. The inclined bracing pile structure in the foundation pit retaining system according to claim 1 is characterized in that: It also includes multiple third connecting beams which are arranged parallel to the second connecting beams and fixed to the foundation pit retaining piles; the first connecting beams, the second connecting beams and the third connecting beams are all reinforced concrete connecting beams; multiple first reinforced concrete connecting beams, multiple second reinforced concrete connecting beams and multiple third reinforced concrete connecting beams constitute a transverse reinforced concrete support frame extending along the foundation pit retaining piles.
3. The inclined bracing pile structure in the foundation pit retaining system according to claim 2 is characterized in that: The transverse reinforced concrete support frame is arranged horizontally.
4. The inclined bracing pile structure in the foundation pit retaining system according to claim 1 is characterized in that: The auxiliary vertical support piles include vertical steel supports above the bottom surface of the foundation pit and vertical piles fixed in the soil below the bottom surface of the foundation pit.
5. The inclined bracing pile structure in the foundation pit retaining system according to claim 1 or 4, characterized in that: The auxiliary vertical supporting piles are vertical supporting piles.
6. The inclined bracing pile structure in the foundation pit retaining system according to claim 1 or 4, characterized in that: The auxiliary vertical support piles are oblique support piles whose inclination direction is the same as that of the steel oblique support.
7. The inclined bracing pile structure in the foundation pit retaining system according to claim 6 is characterized by: The angle between the upward extension line of the central axis of each oblique support pile and the upward extension line of the central axis of the foundation pit retaining pile connected via the first connecting beam is 25°-35°.