Inclined strut supporting structure of foundation pit

Abstract

The utility model discloses a foundation pit inclined strut supporting structure which comprises a fender post vertically arranged around the side wall of a foundation pit and an inclined support arranged on the inner side of the fender post, a horizontal support is arranged between the fender post and the inclined support, one end of the horizontal support is arranged on the inner side of the fender post through an enclosing purlin, and the other end of the horizontal support is connected through a horizontal cross beam. The upper end of the inclined support is connected with the lower side wall of the horizontal support, and the lower end is connected with the bottom of the foundation pit. According to the scheme, the horizontal supports, the enclosing purlins and the horizontal cross beams form the horizontal supporting frame, a stable structure is formed, the connecting strength is enhanced, and the integrity of the supporting structure is improved; the site applicability is increased, the site requirement is reduced, and construction is facilitated; the horizontal support and the inclined support are connected through the steel strand rope, and the vertical force of the inclined support is converted into the horizontal force of the horizontal support, so that the upper end of the fender post bears the horizontal force, the vertical shearing force of the upper end of the fender post is reduced, and the stress performance of the upper end of the fender post is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to building foundation pit engineering technical field especially is related to a foundation pit inclined bracing support structure. BACKGROUND

[0002] In the foundation pit support, the support system of pile row combined with reinforced concrete horizontal inner support is often used, and the system has the defects of large support span, high energy consumption, large pollution, high cost, long construction period, and difficult construction operation when the area of foundation pit is large, and cannot meet the demand of green economic environmental protection in large underground space development. The support system of pile row combined with inclined throw bracing can save a large amount of materials and facilitate large-area excavation through the process measure of leaving soil first and then constructing inclined throw bracing, but has the defects of small operation surface, difficult construction and artificial setting of construction joint or post-pouring band when the soil range is excavated. The advanced inclined pile bracing is a support scheme that can replace the inclined throw bracing at present, and the method forms the advanced inclined bracing through direct driving, pre-stirring (spraying) and post-insertion or simultaneous stirring (spraying) and insertion during the construction stage of the enclosure pile, so that the horizontal lateral force of the foundation pit enclosure structure is converted into the lateral friction and end resistance of the inclined pile bracing and the base soil, thereby effectively controlling the deformation of the enclosure structure. The advanced inclined bracing reduces the soil left at the pit edge compared with the inclined throw bracing, is convenient for construction, and shortens the construction period.

[0003] However, the current inclined pile bracing has the following problems: 1) the current corbel and inclined pile bracing usually adopt the form of adding support piers, and the support piers bear a large vertical upward force, which easily leads to the destruction of the support piers or the connection position between the support piers and the corbel; 2) the inclined pile bracings are arranged at intervals and are connected only through the corbel, and the overall performance is relatively poor; and 3) the inclined pile bracings need to be inserted obliquely, and the construction has certain requirements for the space around the foundation pit, and in the case of insufficient site conditions, such as adjacent existing buildings, the construction may not be possible.

[0004] For example, Chinese patent publication No. CN112575796A, published on March 30, 2021, named “a foundation pit support structure and its construction method”, which comprises enclosure piles, a cable-stayed system, anchor piles, support rods, waist beams, bidirectional oil cylinders, steel wire ropes, corbels, sliding blocks, and limiting beams; the cable-stayed system comprises inclined composite piles and anchor rods, and the specific construction steps of the technical solution are: construction preparation, construction of enclosure piles, construction of the cable-stayed system, construction of corbels, construction of anchor piles, foundation pit excavation, excavation of trenches, construction of sliding blocks, waist beams, limiting beams, and support rods, continuous excavation and dynamic adjustment of the support structure, and construction completion.

[0005] The existing patent has the following disadvantages: the inclined pile bracing in the existing support structure is connected only through the corbel and the enclosure pile, and has the problems of low connection strength, poor overall performance, and occupation of a large amount of construction site. UTILITY MODEL CONTENTS

[0006] The utility model discloses a kind of foundation pit inclined strut support structures, including the vertical setting of surrounding pile around foundation pit side wall and the inclined support of being set in surrounding pile, horizontal support is equipped between the surrounding pile and the inclined support, one end of horizontal support is set in the inside of surrounding pile by surrounding purlin, the other end is connected by horizontal crossbeam, the lower side wall of the upper end of inclined support is connected with horizontal support, and the bottom of foundation pit is connected with lower end.

[0007] In order to achieve the above object, the utility model adopts the following technical scheme:

[0008] A kind of foundation pit inclined strut support structure, including the vertical setting of surrounding pile around foundation pit side wall and the inclined support of being set in surrounding pile, horizontal support is equipped between the surrounding pile and the inclined support, one end of horizontal support is set in the inside of surrounding pile by surrounding purlin, the other end is connected by horizontal crossbeam, the lower side wall of the upper end of inclined support is connected with horizontal support, and the bottom of foundation pit is connected with lower end. The utility model discloses a kind of foundation pit inclined strut support structure, in which horizontal support is provided between the surrounding pile and the inclined support, one end of the horizontal support is connected by surrounding purlin and set in the inside of the surrounding pile, and the other end is connected by horizontal crossbeam. The horizontal support, surrounding purlin and horizontal crossbeam form a horizontal support frame, and the inclined support is set in the inside of the surrounding pile by the horizontal support frame, thereby avoiding the problem of single inclined support being subjected to force alone, forming a stable structure, enhancing the connection strength, and improving the overall performance of the support structure.

[0009] The provision of horizontal support enables the inclined support to be directed from the outside of the pit to the inside of the pit compared to the conventional inclined support construction site, thereby increasing the site applicability and reducing the site requirements, and facilitating the construction.

[0010] Preferably, the horizontal support and the inclined support are connected and tensioned with a steel strand rope. The horizontal support and the inclined support are connected by the steel strand rope, so that the support structure has good overall performance, high rigidity, forms a stable structure, is beneficial to the deformation control of the foundation pit and the surrounding environment, the vertical force of the inclined support is converted into the horizontal force of the horizontal support by connecting the horizontal support and the inclined support with the steel strand rope, the upper end of the surrounding pile bears the horizontal force, the vertical shear force of the upper end of the surrounding pile is reduced, and the stress performance of the upper end of the surrounding pile is improved.

[0011] Preferably, the upper end of the surrounding pile is provided with a crown beam, and the surrounding purlin is arranged on the inside of the crown beam. The vertical force of the inclined support is converted into the horizontal force of the horizontal support by connecting the horizontal support and the inclined support with the steel strand rope, the crown beam bears the horizontal force, the vertical shear force of the crown beam is reduced, the stress performance of the crown beam is improved, and the reinforcement of the crown beam is reduced.

[0012] Preferably, the number of horizontal supports is multiple, and two adjacent horizontal supports are arranged in parallel, and the horizontal support is arranged perpendicularly to the surrounding pile. The multiple parallel horizontal supports, surrounding purlins and horizontal crossbeams form a stable structure, enhance the connection strength, and improve the overall performance of the support structure.

[0013] As preferred, the steel strand is connected with the horizontal support and the inclined support respectively through an anchoring device, the anchoring device comprises a bottom end plate arranged on the horizontal support or the inclined support, an anchoring plate connected with the bottom end plate, and a side plate connecting the bottom end plate and the anchoring plate, and the steel strand is anchored on the anchoring plate.

[0014] As preferred, a conical anchor is arranged on the anchoring plate, and a clamp is arranged on the steel strand, and the clamp is anchored on the conical anchor.

[0015] As preferred, the surrounding purlin is horizontally arranged, the horizontal cross beam is arranged in parallel with the surrounding purlin, and the upper end of the inclined support is located on the lower side wall of the horizontal support near one end of the horizontal cross beam.

[0016] As preferred, the horizontal support adopts H-shaped steel, and a stiffener plate is arranged on the horizontal support at the connection position of the steel strand and / or the inclined support. The stiffener plate improves the strength of the horizontal support.

[0017] As preferred, the inclined support adopts H-shaped steel, and a stiffener plate is arranged on the inclined support at the connection position of the steel strand and / or the horizontal support. The stiffener plate improves the strength of the inclined support.

[0018] As preferred, the lower end of the inclined support is fixed on the bottom of the foundation pit through a cement-soil pile, and the cement-soil pile is fixed on the outer wall of the inclined support. The bearing capacity is improved, and the horizontal resistance is transmitted to the retaining pile through the horizontal support and the steel strand, so that a larger horizontal resistance is formed.

[0019] Therefore, the utility model has the following beneficial effects: the horizontal support, the surrounding purlin and the horizontal cross beam form a horizontal support frame, the inclined support is arranged on the inner side of the retaining pile through the horizontal support frame, the problem of single inclined support bearing force alone is avoided, a stable structure is formed, the connection strength is enhanced, and the integrity of the supporting structure is improved; the horizontal support is arranged to make the inclined support turn from the outside of the pit to the inside of the pit compared with the traditional inclined support construction operation surface, the site applicability is increased, the site requirement is reduced, and construction is facilitated; the horizontal support and the inclined support are connected through the steel strand to make the supporting structure have good integrity, large rigidity, form a stable structure, control the deformation of the foundation pit, and be beneficial to the surrounding environment; the vertical force of the inclined support is converted into the horizontal force of the horizontal support through the steel strand arranged between the horizontal support and the inclined support, the upper end of the retaining pile bears the horizontal force, the vertical shear force of the upper end of the retaining pile is reduced, and the stress performance of the upper end of the retaining pile is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a sectional view of the utility model.

[0021] Figure 2It is a structural schematic view of the anchoring device arranged on the horizontal support in the utility model.

[0022] Figure 3 It is Figure 1 It is a partial enlarged view of A in the middle.

[0023] As shown in the figure:

[0024] The fender pile 1, the inclined support 2, the horizontal support 3, the fender purlin 4, the horizontal crossbeam 5, the steel strand rope 6, the crown beam 7,

[0025] The anchoring device 8, the bottom end plate 8.1, the anchoring plate 8.2, the side plate 8.3,

[0026] The conical anchor 9, the clamp 10, the stiffened plate 11, the cement-soil pile 12. Specific implementation

[0027] In order to make the utility model technical scheme embodiment purpose, technical scheme and advantages more clear, the utility model is further described below in combination with the specific implementation and the drawings.

[0028] Embodiment one, as shown in the figure: Figure 1 , Figure 2 , Figure 3 A foundation pit inclined support structure, which comprises a fender pile 1 vertically arranged around the side wall of the foundation pit and an inclined support 2 arranged on the inner side of the fender pile 1, and a horizontal support 3 is arranged between the fender pile 1 and the inclined support 2, one end of the horizontal support 3 is arranged on the inner side of the fender pile 1 through a fender purlin 4, and the other end is connected through a horizontal crossbeam 5, the upper end of the inclined support 2 is connected with the lower side wall of the horizontal support 3, and the lower end is connected with the bottom of the foundation pit.

[0029] The current inclined pile support has the following problems: 1) the crown beam 7 and the inclined pile support usually adopt the form of adding buttress, and the buttress position bears a large vertical upward force, which easily leads to the destruction of the buttress or the connection position of the buttress and the crown beam 7; 2) the inclined pile supports are arranged at intervals and are connected only through the crown beam 7, and the overall performance is relatively poor; 3) the inclined pile support needs to be inserted obliquely, and the construction has certain requirements on the space of the site around the foundation pit, and when the site conditions are insufficient, such as being close to existing buildings, the construction may not be possible. In order to solve the problems that the inclined pile support in the existing support structure is connected only through the crown beam 7 and the fender pile 1, the connection strength of the support structure is low, the overall performance is poor, and a large amount of construction site is occupied, a foundation pit inclined support structure is provided, which enhances the connection strength, improves the overall performance and reduces the occupation of the construction site.

[0030] The foundation pit inclined support structure in the above embodiment, as shown in the figure: Figure 1 , Figure 2 , Figure 3As shown in the drawings, a horizontal support 3 is arranged between the enclosure pile 1 and the inclined support 2, one end of the horizontal support 3 is connected by a surrounding purlin 4 and arranged on the inner side of the enclosure pile 1, and the other end is connected by a horizontal cross beam 5. The horizontal support 3, the surrounding purlin 4 and the horizontal cross beam 5 form a horizontal support 3 frame, the inclined support 2 is arranged on the inner side of the enclosure pile 1 through the horizontal support 3 frame, avoiding the problem of single inclined support 2 bearing force alone, forming a stable structure, enhancing the connection strength, and improving the integrity of the support structure.

[0031] The horizontal support 3 is arranged to make the inclined support 2 change the construction operation surface from outside the pit to inside the pit compared with the traditional inclined support 2, increase the site applicability, reduce the site requirements, and facilitate construction.

[0032] Specifically, as shown in the drawings, Figure 1 , Figure 2 , Figure 3 The crown beam 7 is arranged on the upper end of the enclosure pile 1, and the surrounding purlin 4 is arranged on the inner side of the crown beam 7. By connecting the horizontal support 3 and the inclined support 2 through the steel rope 6 and converting the vertical force of the inclined support 2 into the horizontal force of the horizontal support 3, the crown beam 7 bears the horizontal force, reduces the vertical shear force of the crown beam 7, improves the stress performance of the crown beam 7, and reduces the reinforcement of the crown beam 7.

[0033] Further, as shown in the drawings, Figure 1 , Figure 2 , Figure 3 The number of horizontal supports 3 is multiple, two adjacent horizontal supports 3 are arranged in parallel, and the horizontal support 3 is arranged perpendicularly to the enclosure pile 1. The multiple parallel horizontal supports and the surrounding purlin 4 and the horizontal cross beam 5 constitute a stable frame structure, enhance the connection strength, and improve the integrity of the support structure.

[0034] Further optimization of the surrounding purlin 4, as shown in the drawings, Figure 1 , Figure 2 , Figure 3 The surrounding purlin 4 is arranged horizontally, the horizontal cross beam 5 is arranged in parallel with the surrounding purlin 4, and the upper end of the inclined support 2 is located on the lower side wall of the end of the horizontal support 3 close to the horizontal cross beam 5.

[0035] Further optimization of the horizontal support 3, as shown in the drawings, Figure 1 , Figure 2 , Figure 3 The horizontal support 3 adopts H-shaped steel, and the connection between the horizontal support 3 and the steel rope 6 and / or the inclined support 2 is provided with a stiffener 11. The stiffener 11 improves the strength of the horizontal support 3.

[0036] Further optimization of the inclined support 2, as shown in the drawings, Figure 1 , Figure 2 , Figure 3 The inclined support 2 adopts H-shaped steel, and the connection between the inclined support and the steel rope 6 and / or the horizontal support 3 is provided with a stiffener 11. The stiffener 11 improves the strength of the inclined support 2.

[0037] Further optimization of the inclined support 2, as shown in Figure 1 , Figure 2 , Figure 3 the lower end of the inclined support 2 is fixed to the bottom of the foundation pit by the cement-soil pile 12, and the cement-soil pile 12 is fixed to the outer wall of the inclined support 2. The bearing capacity is improved, and the horizontal force is transmitted to the retaining pile 1 through the horizontal support 3 and the steel cable 6, forming a larger horizontal resistance.

[0038] Example two, as shown in Figure 1 , Figure 2 , Figure 3 a foundation pit inclined support structure, comprising a retaining pile 1 vertically arranged around the side wall of the foundation pit and an inclined support 2 arranged inside the retaining pile 1, a horizontal support 3 is arranged between the retaining pile 1 and the inclined support 2, one end of the horizontal support 3 is arranged inside the retaining pile 1 through the surrounding purlin 4, the other end is connected through the horizontal beam 5, the upper end of the inclined support 2 is connected with the lower side wall of the horizontal support 3, and the lower end is connected with the bottom of the foundation pit.

[0039] Specifically, as shown in Figure 1 , Figure 2 , Figure 3 the upper end of the retaining pile 1 is provided with a corbel 7, and the surrounding purlin 4 is arranged inside the corbel 7. By connecting the horizontal support 3 and the inclined support 2 through the steel cable 6 and converting the vertical force of the inclined support 2 into the horizontal force of the horizontal support 3, the corbel 7 bears the horizontal force, the vertical shear force of the corbel 7 is reduced, the stress performance of the corbel 7 is improved, and the reinforcement of the corbel 7 is reduced.

[0040] In this embodiment, as shown in Figure 1 , Figure 2 , Figure 3 the horizontal support 3 and the inclined support 2 are connected and the steel cable 6 is tensioned. The horizontal support 3 and the inclined support 2 are connected through the steel cable 6, so that the support structure has good integrity, large rigidity and forms a stable structure, which is beneficial to the deformation control of the foundation pit and the surrounding environment; by connecting the horizontal support 3 and the inclined support 2 through the steel cable 6 and converting the vertical force of the inclined support 2 into the horizontal force of the horizontal support 3, the upper end of the retaining pile 1 bears the horizontal force, the vertical shear force of the upper end of the retaining pile 1 is reduced, and the stress performance of the upper end of the retaining pile 1 is improved.

[0041] In this embodiment, as shown in Figure 1 , Figure 2 , Figure 3 all components except the retaining pile 1 and the corbel 7 are assembled, and are connected by bolts, which saves installation and removal time, all steel materials except the inclined support 2 below the pit bottom can be recycled, which is green, environmentally friendly, saves construction period and meets the concept of sustainable development.

[0042] In summary, the utility model has the following beneficial effects: the horizontal support 3, the purlin 4 and the horizontal beam 5 form a horizontal support 3 frame, and the inclined support 2 is arranged on the inner side of the retaining pile 1 through the horizontal support 3 frame, avoiding the problem of a single inclined support 2 being subjected to force alone, forming a stable structure, enhancing the connection strength, and improving the integrity of the support structure; the setting of the horizontal support 3 makes the construction working surface of the inclined support 2 turn from outside the pit to inside the pit compared with the traditional inclined support 2, which increases the applicability of the site, reduces the requirements for the site, and facilitates construction; the horizontal support 3 and the inclined support 2 are connected by a steel rope 6, so that the support structure has good integrity and high rigidity, forming a stable structure, controlling the deformation of the foundation pit and being beneficial to the surrounding environment; by connecting the horizontal support 3 and the inclined support 2 through a steel rope 6 and converting the vertical force of the inclined support 2 into the horizontal force of the horizontal support 3, the upper end of the retaining pile 1 is subjected to horizontal force, reducing the vertical shear force at the upper end of the retaining pile 1, and improving the force performance of the upper end of the retaining pile 1.

[0043] Example 3, as Figure 1 、 Figure 2 、 Figure 3 The diagonal support structure for a foundation pit shown includes a retaining pile 1 vertically arranged around the side wall of the foundation pit and a diagonal support 2 arranged on the inner side of the retaining pile 1. A horizontal support 3 is provided between the retaining pile 1 and the diagonal support 2. One end of the horizontal support 3 is arranged on the inner side of the retaining pile 1 through a purlin 4, and the other end is connected through a horizontal crossbeam 5. The upper end of the diagonal support 2 is connected to the lower side wall of the horizontal support 3, and the lower end is connected to the bottom of the foundation pit. A crown beam 7 is provided at the upper end of the retaining pile 1, and the purlin 4 is arranged on the inner side of the crown beam 7. By connecting the horizontal support 3 and the diagonal support 2 through a steel rope 6 and converting the vertical force of the diagonal support 2 into the horizontal force of the horizontal support 3, the crown beam 7 is subjected to the horizontal force, reducing the vertical shear force of the crown beam 7, improving the force-bearing performance of the crown beam 7, and reducing the reinforcement of the crown beam 7.

[0044] Further, such as Figure 1 、 Figure 2 、 Figure 3 As shown, the horizontal supports 3 and the diagonal supports 2 are connected and tensioned with steel strands 6. The horizontal supports 3 and the diagonal supports 2 are connected by steel strands 6 to ensure good integrity and high rigidity of the support structure, forming a stable structure that controls foundation pit deformation and is beneficial to the surrounding environment. By connecting the horizontal supports 3 and the diagonal supports 2 with steel strands 6 and converting the vertical force of the diagonal supports 2 into the horizontal force of the horizontal supports 3, the upper end of the retaining pile 1 is subjected to horizontal force, reducing the vertical shear force on the upper end of the retaining pile 1 and improving the load-bearing performance of the upper end of the retaining pile 1.

[0045] The connection mode of the steel strand 6 is further optimized, such as Figure 1 、 Figure 2 、 Figure 3As shown in the drawings, the steel strand 6 is connected with the horizontal support 3 and the inclined support 2 through the anchoring device 8, the anchoring device 8 comprises a bottom end plate 8.1 arranged on the horizontal support 3 or the inclined support 2, an anchoring plate 8.2 connected with the bottom end plate 8.1, and a side plate 8.3 connecting the bottom end plate 8.1 and the anchoring plate 8.2, and the steel strand 6 is anchored on the anchoring plate 8.2.

[0046] Further optimization of the anchoring device 8 is made, as shown in the drawings, Figure 1 、 Figure 2 、 Figure 3 As shown in the drawings, a conical anchor 9 is arranged on the anchoring plate 8.2, and a clamp 10 is arranged on the steel strand 6, and the clamp 10 is anchored on the conical anchor 9. The clamp 10 is arranged in and anchored in the conical anchor 9.

[0047] Specifically, as shown in the drawings, Figure 1 、 Figure 2 、 Figure 3 The number of horizontal supports 3 is multiple, and adjacent two horizontal supports 3 are arranged in parallel, and the horizontal support 3 is arranged perpendicularly to the enclosure pile 1. The multiple parallel horizontal supports and the enclosure purlin 4 and the horizontal cross beam 5 form a stable framework, which enhances the connection strength and improves the integrity of the support structure.

[0048] Further optimization of the enclosure purlin 4 is made, as shown in the drawings, Figure 1 、 Figure 2 、 Figure 3 The enclosure purlin 4 is arranged horizontally, the horizontal cross beam 5 is arranged in parallel to the enclosure purlin 4, and the upper end of the inclined support 2 is located on the lower side wall of the end of the horizontal support 3 close to the horizontal cross beam 5.

[0049] Further optimization of the horizontal support 3 is made, as shown in the drawings, Figure 1 、 Figure 2 、 Figure 3 The horizontal support 3 adopts H-shaped steel, and a stiffener 11 is arranged at the connection position of the horizontal support 3 with the steel strand 6 and / or the inclined support 2. The stiffener 11 improves the strength of the horizontal support 3.

[0050] Further optimization of the inclined support 2 is made, as shown in the drawings, Figure 1 、 Figure 2 、 Figure 3 The inclined support 2 adopts H-shaped steel, and a stiffener 11 is arranged at the connection position of the inclined support 2 with the steel strand 6 and / or the horizontal support 3. The stiffener 11 improves the strength of the inclined support 2.

[0051] Further optimization of the inclined support 2 is made, as shown in the drawings, Figure 1 、 Figure 2 、 Figure 3 The lower end of the inclined support 2 is fixedly arranged on the bottom of the foundation pit through a cement-soil pile 12, and the cement-soil pile 12 is fixedly arranged on the outer wall of the inclined support 2. The bearing capacity is improved, and the horizontal resistance is transmitted to the enclosure pile 1 through the horizontal support 3 and the steel strand 6, thereby forming a larger horizontal resistance.

[0052] In summary, the utility model has the following beneficial effects: the horizontal support 3, the surrounding purlin 4 and the horizontal crossbeam 5 form the horizontal support 3 frame, the inclined support 2 is arranged on the inner side of the fender pile 1 through the horizontal support 3 frame, the problem that a single inclined support 2 is stressed alone is avoided, a stable structure is formed, the connecting strength is enhanced, and the integrity of the supporting structure is improved; the horizontal support 3 is arranged to make the inclined support 2 change the working operation surface from outside the pit to inside the pit compared with the traditional inclined support 2, the site applicability is increased, the requirement for the site is reduced, and construction is facilitated; the horizontal support 3 and the inclined support 2 are connected through the steel strand 6 to make the supporting structure have good integrity and large rigidity, form a stable structure, control the deformation of the foundation pit and be beneficial to the surrounding environment; the vertical force of the inclined support 2 is converted into the horizontal force of the horizontal support 3 through the connection between the horizontal support 3 and the inclined support 2 through the steel strand 6, the upper end of the fender pile 1 bears the horizontal force, the vertical shear force of the upper end of the fender pile 1 is reduced, and the stress performance of the upper end of the fender pile 1 is improved.

[0053] The working principle is as follows, as shown in Figure 1 、 Figure 2 、 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure 3 Figure 1 Figure 2 Figure The working principle is as follows, as shown in

[0054] Wire positioning, determine the piling site, clean up obstacles and level the site.

[0055] Construction of the fender pile 1, maintenance of the fender pile 1; the inclined support 2 is welded with the stiffener plate 11 at the anchoring device 8 and the end position in advance, the cement-soil pile 12 is constructed obliquely at the appropriate position, and the inclined support 2 is inserted obliquely in time.

[0056] Excavate the soil to the bottom of the corbel 7, support the mold, tie the reinforcement, embed the anchor bolt, and pour the concrete of the corbel 7.

[0057] After the corbel 7 is maintained to the design strength, the corbel 7 is connected with the surrounding purlin 4 through the anchor bolt, the surrounding purlin 4 is connected with the horizontal support 3, the horizontal support 3 is connected with the horizontal crossbeam 5, and the horizontal support 3 is connected with the inclined support 2 through the bolt, the stiffener plate 11 is welded at the connection between the horizontal support 3 and the anchoring device 8 after the connection and installation are completed.

[0058] Excavate the first layer of soil, and install the anchoring device 8 at the appropriate position of the horizontal support 3 and the inclined support 2 respectively; after the installation is completed, the high-strength steel strand 6 is passed through the conical anchor 9, the prestress is tensioned, the clamp 10 is clamped, and the conical anchor 9 is installed and locked, and the prestress is locked.

[0059] Downward excavation, and repeat step (5), complete the installation and construction of the inclined support structure system.

[0060] Excavate downward to the bottom of the pit, and complete the excavation of the foundation pit soil.

[0061] The above-described specific embodiments are only the preferred embodiments of the utility model, and do not limit the specific implementation range of the utility model. Any equivalent changes made according to the shape and structure of the utility model should be included in the protection range of the utility model.

Claims

1. A foundation pit diagonal support structure, comprising retaining piles vertically arranged around the side walls of the foundation pit and diagonal supports arranged inside the retaining piles, characterized in that: A horizontal support is provided between the guardrail piles and the inclined supports. One end of the horizontal support is arranged on the inner side of the guardrail pile through the guardrail purlin, and the other end is connected through a horizontal beam. The upper end of the inclined support is connected to the lower side wall of the horizontal support, and the lower end is connected to the bottom of the foundation pit.

2. A foundation pit diagonal bracing support structure according to claim 1, characterized in that: The horizontal supports and the oblique supports are connected and tension the steel strands.

3. A foundation pit diagonal bracing support structure according to claim 1 or 2, characterized in that: A crown beam is provided at the upper end of the guard pile, and the surrounding purlin is arranged on the inner side of the crown beam.

4. A foundation pit diagonal bracing support structure according to claim 1 or 2, characterized in that: There are multiple horizontal supports, and two adjacent horizontal supports are arranged in parallel. The horizontal supports are arranged perpendicular to the guard piles.

5. The foundation pit diagonal bracing support structure according to claim 2, characterized in that: The steel rope is connected to the horizontal support and the inclined support respectively through an anchoring device. The anchoring device includes a bottom end plate arranged on the horizontal support or the inclined support, an anchor plate connected to the bottom end plate, and a side plate connecting the bottom end plate and the anchor plate. The steel rope is anchored on the anchor plate.

6. The foundation pit diagonal bracing support structure according to claim 5, characterized in that: A conical anchor is provided on the anchor plate, and a clamp is provided on the steel strand, and the clamp is anchored on the conical anchor.

7. A foundation pit diagonal bracing structure according to claim 1, 2, 5 or 6, characterized in that: The enclosure purlin is arranged horizontally, the horizontal crossbeam is arranged parallel to the enclosure purlin, and the upper end of the oblique support is located on the lower side wall of one end of the horizontal support close to the horizontal crossbeam.

8. A foundation pit diagonal bracing structure according to claim 2, 5 or 6, characterized in that: The horizontal support is made of H-shaped steel, and a stiffening plate is provided at the connection between the horizontal support and the steel rope and / or the oblique support.

9. A foundation pit diagonal bracing structure according to claim 2, 5 or 6, characterized in that: The oblique supports are made of H-shaped steel, and stiffening plates are provided at the connections between the oblique supports and the steel strands and / or the horizontal supports.

10. A foundation pit diagonal bracing structure according to claim 1 or 2 or 5 or 6, characterized in that: The lower end of the oblique support is fixed to the bottom of the foundation pit through a cement soil pile, and the cement soil pile is fixed to the outer wall of the oblique support.

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