Pile foundation structure for bridge construction support

Abstract

The application discloses a pile foundation structure of a support for bridge construction, which comprises pile foundations and anti-overturning beams which are detachably and fixedly installed on the pile foundations; the pile foundations are two and are arranged along the width direction of the bridge, and each comprises a pile body which is driven into the ground and a ground bearing platform which is detachably and fixedly installed on the pile body; the two ends of the anti-overturning beam are respectively extended along the length direction of the bridge to form overturning load bearing parts and are supported on the ground; the application adopts the structure of the pile body combined with the bearing platform, has lower requirements on the quality of the ground, can effectively prevent settlement, has larger bearing capacity, prevents overturning by using the self-installed structure, does not need to set separate anti-overturning facilities, is beneficial to finally guaranteeing the construction quality of the bridge and improving the construction efficiency and can be repeatedly used; as large-area concrete foundation is not needed, the application is suitable for bridge construction of rivers and the like, reduces pollution caused to the environment, and greatly reduces the construction cost compared with the traditional concrete foundation.

Description

Technical Field

[0001] This invention relates to a construction auxiliary platform, and more particularly to a pile foundation structure for a support for bridge construction. Background Technology

[0002] Long-span continuous steel girder bridges are a common bridge structure, especially for large-span bridges spanning rivers and lakes. The complex structure and high construction difficulty make this challenging. For example, the construction of integral steel box girders typically involves prefabricating steel box girder segments and assembling the entire girder on-site. During on-site assembly of these segments, the large span necessitates the formation of supports between the segments at the joints, and an operating platform is required during the hoisting and assembly process. Current technology typically involves erecting scaffolding on-site for support and providing a safe operating platform. This usually involves waterproofing, foundation construction, and then installing the scaffolding on the foundation. This method requires waterproofing and foundation curing, resulting in a long overall construction period. Furthermore, the settlement of riverbeds and other ground surfaces is significant and difficult to control, posing a risk of settlement and impacting the bridge's construction quality. Additionally, to prevent scaffolding overturning, the foundations are often quite wide, increasing construction difficulty and potentially causing significant environmental pollution upon completion.

[0003] Therefore, the foundation structure of the support has a significant impact on the stability and construction efficiency of the support. It is necessary to improve the foundation structure of the existing support platform for continuous steel beam construction to enable the platform construction to be completed in a short time, improve construction efficiency, effectively prevent settlement, ensure the quality of bridge construction, and reduce environmental pollution. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a pile foundation structure for a support for bridge construction, which can complete the construction of the platform in a short time, improve construction efficiency, effectively prevent settlement, ensure the quality of bridge construction, and reduce environmental pollution.

[0005] The present invention provides a pile foundation structure for a support for bridge construction, comprising a pile foundation and an anti-overturning beam that is detachably and fixedly installed on the pile foundation;

[0006] The pile foundation consists of two piles arranged along the width of the bridge, including piles driven into the ground and ground caps that can be detached and fixed to the piles; the two ends of the anti-overturning beam extend along the length of the bridge to form overturning load bearing parts and are supported on the ground.

[0007] Furthermore, the anti-overturning beam is provided with several anti-overturning support feet, which are supported on the ground. The anti-overturning support feet can be adjusted to move up and down and can be locked onto the anti-overturning beam.

[0008] Furthermore, each of the pile foundations consists of four piles arranged in a rectangular pattern, and the ground cap is composed of a cap beam that is detachably and fixedly connected between adjacent piles; there are two anti-overturning beams, and the two anti-overturning beams are respectively detachably and fixedly installed on both sides of the pile foundation, parallel to the length direction of the bridge.

[0009] Furthermore, the foundation structure also includes a load-bearing beam, which is detachably and fixedly connected between the two pile foundations;

[0010] In use, the bracket is fixedly installed on the two pile foundations, the anti-overturning beam and the load-bearing beam in the width direction of the bridge;

[0011] The load-bearing beam has several load-bearing support feet distributed on it to support the ground. The load-bearing support feet can be adjusted to move up and down and can be locked onto the load-bearing beam.

[0012] Furthermore, the anti-tipping support foot includes an anti-tipping base plate, an anti-tipping support rod, and an anti-tipping adjusting nut. The anti-tipping support rod can slide up and down through the anti-tipping beam and its bottom end is connected to the anti-tipping base plate. The anti-tipping adjusting nut is threadedly fitted onto the anti-tipping support rod and supports the bottom of the anti-tipping beam upwards. The anti-tipping support rod extends upwards out of the anti-tipping beam and is threadedly fitted with an anti-tipping locking nut.

[0013] The load-bearing support foot includes a load-bearing base plate, a load-bearing support rod, and a load-bearing adjusting nut. The load-bearing support rod can slide up and down through the load-bearing beam and its bottom end is connected to the load-bearing base plate. The load-bearing adjusting nut is threadedly fitted onto the load-bearing support rod and supports the bottom of the load-bearing beam upwards. The load-bearing support rod extends upwards out of the load-bearing beam and is threadedly fitted with a load-bearing locking nut.

[0014] The pier beam is also provided with pier support feet, including a pier base plate, a pier support rod and a pier adjustment nut. The pier support rod can slide up and down through the pier beam and its bottom end is connected to the pier base plate. The pier adjustment nut is threadedly fitted to the pier support rod and supports the bottom of the pier beam upward. The pier support rod extends upward out of the pier beam and is threadedly fitted with a pier locking nut.

[0015] Furthermore, each of the anti-tipping support feet includes an anti-tipping base plate and four anti-tipping support rods arranged in a rectangular pattern. The anti-tipping base plate has a set area and is horizontally arranged.

[0016] The load-bearing support foot includes a load-bearing base plate and four load-bearing support rods arranged in a rectangular shape. The load-bearing base plate is horizontally arranged and has a set contact area with the ground.

[0017] The support foot of the pedestal includes a pedestal base plate and at least two pedestal support rods. The pedestal base plate is horizontally arranged and has a set contact area with the ground.

[0018] Furthermore, the pile body is a square steel pipe pile, and concrete is poured inside the square steel pipe pile;

[0019] The pile cap beam is fixed with pile cap beam connecting plates extending upward and downward from its end face close to the pile body. The pile cap beam connecting plates are fixedly connected to the corresponding pile body by a group of bolts. The anti-overturning beam is attached to the outside of the pile body and is fixed with anti-overturning beam connecting plates extending upward and downward. The anti-overturning beam connecting plates and the pile cap beam connecting plates on the opposite side are fixedly connected to the corresponding pile body by the same group of bolts.

[0020] A reinforcing plate is provided on the opposite side of the connecting plate of the pier beam parallel to the anti-overturning beam, and is fixed to the corresponding pile body by a bolt group.

[0021] Furthermore, the width of the pier cap beam is equal to the width of the side connected to the pile body. The anti-overturning beam is closely attached to the corresponding pier cap beam and is detachably fixed by a group of bolts. The anti-overturning beam extends downward to form an anti-overturning beam connecting wing of the same length as the corresponding pier cap beam. The corresponding pier cap beam extends downward to form a pier cap beam connecting wing. The anti-overturning beam connecting wing and the pier cap beam connecting wing are overlapped and fixedly connected by a group of bolts.

[0022] Furthermore, the end of the load-bearing beam is tightly attached to the side of the corresponding anti-overturning beam, and the upper and lower surfaces are respectively covered with a cover plate covering the joint between the load-bearing beam and the anti-overturning beam, and are fixedly connected by a group of bolts; the left and right sides of the load-bearing beam are connected to the side of the anti-overturning beam by angle steel connectors, one wing of the angle steel connector is fixed to the side of the anti-overturning beam by a group of bolts, and the other wing is fixed to the corresponding side of the load-bearing beam by a group of bolts.

[0023] Furthermore, the anti-overturning beam is a square box girder, and anti-overturning beam ribs are vertically provided along the length of the beam inside the square box girder; the load-bearing beam is a square box girder, and load-bearing beam ribs are vertically provided along the longitudinal direction of the beam inside the square box girder.

[0024] The beneficial effects of this invention are as follows: The pile foundation structure for bridge construction supports of this invention uses pile foundations as the detachable installation foundation for the construction supports, and utilizes the pile foundation as the base for installing anti-overturning measures, ensuring overall stability and load-bearing capacity. This structure allows the piles to be pre-driven in during the dry season, eliminating the need for water isolation or curing during installation, thus significantly shortening the construction time of the support itself. Simultaneously, the structure using piles combined with a pile cap has lower requirements for ground quality, effectively preventing settlement and possessing a large load-bearing capacity. The self-installed structure prevents overturning, eliminating the need for separate anti-overturning facilities, which helps ensure the final bridge construction quality and improves construction efficiency. Furthermore, since it does not require large-area concrete foundations, it is suitable for bridge construction in river channels, reducing environmental pollution. Moreover, the foundation structure can be disassembled after bridge construction and reused for other bridges or bridges on the opposite side, achieving energy saving and cost reduction effects, significantly lowering construction costs compared to traditional concrete foundations. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the basic structural design of the present invention;

[0027] Figure 2 for Figure 1 View along direction A;

[0028] Figure 3 A partial top view based on the basic structure;

[0029] Figure 4 This is a schematic diagram of a tension-fixed connection structure;

[0030] Figure 5 This is a cross-sectional view of the load-bearing beam;

[0031] Figure 6 Cross-sectional diagram of the anti-overturning beam;

[0032] Figure 7 This is an elevation view of the application of the present invention (along the transverse direction of the bridge).

[0033] Figure 8 for Figure 7 View along direction B. Detailed Implementation

[0034] As shown in the figure: The pile foundation structure for the support used in bridge construction in this embodiment includes a pile foundation 1 and an anti-overturning beam 3 that is detachably fixed to the pile foundation;

[0035] The pile foundation 1 consists of two piles arranged along the width of the bridge 6, including piles 101 driven into the ground and detachable ground caps fixed to the piles. The anti-overturning beam 3 extends from both ends along the length of the bridge 6 to form overturning load bearing parts and is supported on the ground. After the piles 101 are driven into the ground, sufficient connection points should be reserved on the ground to ensure the installation of the ground caps and anti-overturning beams. The structure of the ground cap can adopt the existing pile cap structure used in pile driving. Detachable installation on the piles generally uses a bolt group installation method, where bolts can be welded or pre-embedded, etc., which will not be elaborated here. The support structure is used to splice and support box girder segments; therefore, in the length direction of the bridge, support for the box girder segments on both sides is only formed at the interface. This means that the anti-overturning beam needs to cover the entire width of the bridge, making its dimensions much larger than its dimensions along the length. Therefore, while ensuring load-bearing capacity, overturning along the length of the bridge must be prevented. The anti-overturning beam extends to both ends along the bridge's length, extending beyond the area of ​​the pile foundations. In other words, the anti-overturning beam should cross the pile foundations along the bridge's length, and the extended length, based on the support height, should provide sufficient resistance to the overturning force. This is something that anyone skilled in the art can easily determine through simple judgment based on the technical solution of this invention, ultimately achieving the goal of preventing the support from overturning. The connection between the anti-overturning beam and the piles and / or the ground cap is detachable, generally achieved through bolt groups, ensuring sufficient support strength.

[0036] In use, this invention features a detachable mounting bracket 4 on the upper part of the foundation structure, with a top support platform 5 at the top. The bracket can be any existing bracket structure capable of being installed on the foundation structure, such as a truss structure or other erected support brackets. The top support platform 5 is a conventional top support platform structure, such as... Figure 7 As shown, a frame structure consisting of longitudinal beams and transverse beams can be used. Of course, to increase strength, the frame structure is also equipped with intermediate reinforcing beams. To adjust the height and facilitate dismantling after construction, jacks are also distributed on the frame structure to directly support the box girder segments, which will not be elaborated here. Of course, guy ropes used in existing technologies can also be installed during installation to further increase safety, which will not be elaborated here.

[0037] In this embodiment, the anti-overturning beam 3 is provided with a plurality of anti-overturning support legs 301, which are supported on the ground. The anti-overturning support legs 301 can be adjusted to move up and down and can be locked onto the anti-overturning beam 3. As shown in the figure, multiple sets of anti-overturning support legs 301 are arranged along the length of the anti-overturning beam 3 to ensure that they can work together to bear the overturning load and avoid local stress. After the anti-overturning beam 3 is installed on the pile foundation 1, there is a distance between its bottom and the ground, which cannot guarantee the stability of the anti-overturning structure. By setting the anti-overturning support legs 301, after the anti-overturning beam 3 is installed, the height of the anti-overturning support legs 301 can be adjusted to achieve the desired stability. A certain amount of support is placed on the ground to ensure the anti-overturning purpose is achieved. Before construction, it is best to clean the loose ground surface around the anti-overturning beam to expose a hard ground. Of course, if there is enough support area on the ground (such as using a plate structure at the bottom), the ground strength requirement is not necessarily hard, and the anti-overturning support foot will not sink, thus achieving the anti-overturning requirement. The anti-overturning support foot 301 can be adjusted to move up and down and locked to the anti-overturning beam 3. This can be achieved through existing mechanical structures, such as using nuts to lock or release for adjustment, hydraulic outriggers, mechanical jacks, etc., all of which can achieve the purpose of the invention.

[0038] In this embodiment, each pile foundation 1 has four piles 101 arranged in a rectangular pattern (represented by the same reference numerals), meaning that the four piles are located at the four corners of the rectangle, which will not be elaborated further here. The ground cap is composed of cap beams 102 that are detachably and fixedly connected between adjacent piles, as shown in the figure. There are four cap beams 102 (represented by the same reference numerals), which are fixed between adjacent piles to form a rectangular structure. There are two anti-overturning beams 3 (represented by the same reference numerals), and the two anti-overturning beams are detachably and fixedly installed on both sides of the pile foundation, corresponding to the two sides of the rectangle, which are consistent with the longitudinal direction of the bridge. Each pile foundation is provided with two anti-overturning beams 3 and distributed on both sides, which can evenly assist the pile foundation in completing the anti-overturning function, further forming a stable anti-overturning support, thereby improving the safety and reliability of the structure.

[0039] In this embodiment, the foundation structure also includes a load-bearing beam 2, which is detachably and fixedly connected between the two pile foundations 1;

[0040] In use, the bracket 4 is fixedly installed on two pile foundations 1, anti-overturning beams 3, and bearing beams 2 in the width direction of the bridge 6. As shown in the figure, two anti-overturning beams 3 are respectively provided on the two pile foundations 1. The bearing beam 2 is fixedly connected to the inner anti-overturning beam and then fixedly connected to the pile foundation 1 through the anti-overturning beam, thus completing the overall fixation and forming a stable foundation. Here, the inner side refers to the side facing the centerline in the length direction of the bearing beam, which will not be described in detail here.

[0041] The load-bearing beam 2 is provided with a plurality of load-bearing support feet 201 for supporting the ground, and the load-bearing support feet 201 can be adjusted to move up and down and can be locked to the load-bearing beam 2.

[0042] As shown in the figure, multiple sets of bearing support feet 201 are arranged along the length of the bearing beam 2 to ensure that they can work together to bear vertical loads and avoid local stress. After the bearing beam is installed on the pile foundation 1, there is a distance between its bottom and the ground. Although the support is between the two pile foundations 1 and the anti-overturning beams 3 corresponding to the two pile foundations, when the support 4 bears a large vertical load, the bearing beam 2 needs to bear part of the vertical load due to the deformation of the support 4, which cannot guarantee the stability of the top of the support. By setting the bearing support feet 201, after the bearing beam 2 is installed, the height of the bearing support feet 201 is adjusted so that they have a set strength to support the ground, thereby ensuring that the vertical load is increased. The load-bearing capacity; before construction, the best construction method is to clean the loose ground surface at the location of the load-bearing beam 2, exposing a hard ground. Of course, under the condition that there is sufficient support area on the ground (such as the bottom using a plate structure), the ground strength requirement is not necessarily hard, and the load-bearing support leg 201 will not sink, which can meet the need to increase the vertical load bearing capacity; the way that the load-bearing support leg 201 can be adjusted to move up and down and locked to the load-bearing beam 2 can be achieved by existing mechanical structures, such as using nuts to lock or release for adjustment, hydraulic outriggers, mechanical jacks, etc., can all achieve the purpose of the invention.

[0043] In this embodiment, the anti-tipping support foot 301 includes an anti-tipping base plate 3011, an anti-tipping support rod 3012, and an anti-tipping adjusting nut 3013. The anti-tipping support rod 3012 can slide up and down through the anti-tipping beam, meaning that a through hole for the anti-tipping support rod 3012 needs to be opened on the anti-tipping beam, which will not be described in detail here. The bottom end of the anti-tipping support rod 3012 is connected to the anti-tipping base plate 3011. The anti-tipping base plate 3011 is a plate structure, which greatly increases the support area and prevents settlement under stress. The connection between the bottom end of the anti-tipping support rod 3012 and the anti-tipping base plate 3011 can be fixed welding, but structurally, a ball joint connection is preferred, which has better support surface adaptability, but the cost is higher. Since multiple anti-tipping support feet 301 form multi-point support, welding and other fixed connection methods can still achieve the purpose of the invention. Therefore, this embodiment adopts a welded connection structure; the anti-tipping adjusting nut 3013 is threadedly fitted onto the anti-tipping support rod and supports the bottom of the anti-tipping beam 3 upwards; the anti-tipping support rod extends upwards from the anti-tipping beam 3 and is threadedly fitted with an anti-tipping locking nut; of course, the anti-tipping support rod should be machined with external threads that mate with the anti-tipping adjusting nut 3013 and the anti-tipping locking nut, which will not be elaborated here; in order to ensure the support effect and avoid stress concentration, a large pad can be placed between the anti-tipping adjusting nut 3013 and the bottom (lower surface) of the anti-tipping beam 3, which will not be elaborated here; in use, the anti-tipping adjusting nut 3013 is adjusted upwards to make the anti-tipping base plate 3011 press tightly against the ground; the anti-tipping locking nut is mainly used to prevent the anti-tipping support rod 3012 from coming off the anti-tipping beam 3 during transportation and installation, which will not be elaborated here;

[0044] The load-bearing support foot 201 includes a load-bearing base plate 2011, a load-bearing support rod 2012, and a load-bearing adjusting nut 2013. The load-bearing support rod can slide up and down through the load-bearing beam 2, and its bottom end is connected to the load-bearing base plate 2011. The load-bearing adjusting nut 2013 is threadedly fitted onto the load-bearing support rod 2012 and supports the bottom (lower surface) of the load-bearing beam 2. The load-bearing support rod 2012 extends upward from the load-bearing beam 2 and is threadedly fitted with a load-bearing locking nut. The structure of the load-bearing support foot 201 and its cooperation with the load-bearing beam are similar to those of the anti-overturning support foot 301 and its cooperation with the anti-overturning beam 3. At the same time, the technical effects are also similar, and will not be described in detail here.

[0045] The pier beam 102 is also provided with a pier support foot 103, including a pier base plate 1031, a pier support rod 1032, and a pier adjusting nut 1033. The pier support rod 1032 can slide up and down through the pier beam 102, and its bottom end is connected to the pier base plate 1031. The pier adjusting nut 1033 is threadedly fitted to the pier support rod 1032 and supports the bottom (lower surface) of the pier beam 102. The pier support rod 1032 extends upward out of the pier beam and is threadedly fitted with a pier locking nut. The structure of the pier support foot 103 and its cooperation with the pier beam are similar to the structure of the anti-overturning support foot 301 and its cooperation with the anti-overturning beam 3. At the same time, the technical effects are also similar, so they will not be described in detail here.

[0046] In this embodiment, each anti-overturning support foot 301 includes an anti-overturning base plate 3011 and four rectangularly distributed anti-overturning support rods 3012 (represented by the same reference numerals). The anti-overturning base plate has a set area and is horizontally arranged. The set area refers to the anti-overturning base plate being set according to the width and length of the anti-overturning beam. Generally, the width is consistent with the width of the anti-overturning beam, and the length does not interfere with the anti-overturning base plate 3011 of the adjacent anti-overturning support foot 301 and leaves a certain gap. This will not be elaborated further here. The four rectangularly distributed anti-overturning support rods 3012 can evenly transmit the load, thereby forming a stable anti-overturning support.

[0047] The load-bearing support foot 201 includes a load-bearing base plate 2011 and four rectangularly distributed load-bearing support rods 2012. The load-bearing base plate 2011 has a predetermined area and is horizontally arranged. Similarly, the predetermined area refers to the area of ​​the load-bearing base plate 2011 being set according to the width and length of the load-bearing beam. Generally, the width is consistent with the width of the load-bearing beam, and the length does not interfere with the load-bearing base plates 2011 of adjacent load-bearing support feet 201 and leaves a certain gap. This will not be elaborated further here. The four rectangularly distributed load-bearing support rods 2012 can evenly transmit the load, thereby forming a stable vertical load support.

[0048] Since both the load-bearing beam and the anti-overturning beam bear vertical loads, and the anti-overturning beam also bears the overturning torque load, both have requirements in terms of width and height. For the present invention, in order to achieve a stable foundation structure, both are relatively wide. Therefore, each load-bearing support foot 201 and anti-overturning support foot 301 can be arranged with four rectangularly distributed load-bearing support rods 2012 and four rectangularly distributed anti-overturning support rods 3012. Of course, depending on the load (the size of the support and the bridge), the dimensions of the two will also be different. These can be obtained through simple calculations using existing calculation methods, and will not be elaborated here.

[0049] The foundation support foot 103 includes a foundation base plate 1031 and at least two foundation support rods 1032. The bearing base plate is horizontally arranged and has a set contact area with the ground. In this invention, each pile foundation uses four piles. Therefore, the lateral dimension of the pile is relatively small during actual construction. Since the foundation beam is connected to the pile, its cross-sectional dimension should be adapted to the lateral dimension of the pile. Therefore, each foundation support foot 103 uses two foundation support rods 1032, and the four foundation beams are fixed on the pile 101 to form an integral ground foundation. This still ensures that all foundation support feet 103 are evenly stressed and the load is evenly transmitted. Further details are omitted here.

[0050] In this embodiment, the pile body 101 is a square steel pipe pile, and concrete is poured inside the square steel pipe pile; this ensures the overall tensile and compressive strength of the pile body, and ultimately ensures the bearing capacity of the pile foundation.

[0051] The pier cap beam 102 is used to fix pier cap beam connecting plates 1021 and 1021a respectively, extending upward and downward from the end face of the pile body 101. (In the attached drawings, the pier cap beam connecting plates at the top and bottom of the pier cap beam 102 are indicated by the reference numerals 1021 and 1021a, which does not affect the understanding of the scheme and will not be described in detail here.) The pier cap beam connecting plates 1021 and 1021a are fixedly connected to the corresponding pile body 101 by bolt groups. As shown in the figure, the pier cap beam connecting plates 1021 and 1021a are formed by the end plates welded to the end face of the pier cap beam 102 extending upward and downward, with the same width as the pier cap beam. The bolt group refers to multiple bolts distributed on the pier cap beam connecting plates 1021 and 1021a to form a tight connection, which has the effect of synergistic force bearing and will not be described in detail here.

[0052] The anti-overturning beam 3 is closely attached to the outer side of the pile body 101, and anti-overturning beam connecting plates 302 and 302a are fixedly installed on its upward and downward extensions, respectively (in the attached drawings, all anti-overturning beam connecting plates of the upper and lower anti-overturning beam 3 are indicated by reference numerals 1021 and 1021a, which does not affect the understanding of the scheme and will not be elaborated here). The anti-overturning beam connecting plates 302 and 302a are fixedly connected to the corresponding pile body 101 by the same group of bolts to the opposite pile body 101; the opposite side refers to the two sides located opposite to the corresponding pile body, which will not be elaborated here; Figure 4As shown, the tie-fixed connection refers to the bolts of the bolt group passing through the pile body and being connected to the corresponding pile cap beam connecting plates 1021, 1021a and anti-overturning beam connecting plates 302, 302a respectively, without welding. Furthermore, when pouring concrete into the pile body, the bolts of the bolt group can be poured together, which enhances the strength of the pile body while ensuring the connection strength. The anti-overturning beam connecting plates 302, 302a are generally formed directly from the side plates of the anti-overturning beam 3, or they can be formed separately by welding. Both can achieve the purpose of the invention, and will not be described in detail here.

[0053] On the opposite sides of the pier beam connecting plates 1021 and 1021a of the pier beam 102 parallel to the anti-overturning beam 3, there are reinforcing plates 7 (all reinforcing plates are represented by the same reference numerals in the attached drawings, which does not affect the understanding of the scheme, and will not be described in detail here), and they are fixed to the corresponding pile body 101 by bolt groups; the height and width dimensions of the reinforcing plates 7 should be consistent with those of the pier beam connecting plates 1021 and 1021a, such as... Figure 4 As shown, the tie-fixed connection and its beneficial effects are consistent with the above description and will not be repeated here; however, during construction, the bolts of the bolt group connecting the anti-overturning beam connecting plates 302 and 302a and the bolt group of the reinforcing plate should be staggered vertically to avoid installation interference, which will not be repeated here.

[0054] In this embodiment, the width (horizontal dimension) of the foundation beam 102 is equal to the width of the side of the pile 101 corresponding to it (the side connected to the foundation beam). The anti-overturning beam 3 is parallel to and tightly attached to the corresponding foundation beam, and is detachably fixed by a group of bolts. Since the width of the foundation beam 102 is equal to the width of the side connected to the pile 101, when the anti-overturning beam 3 is close to and connected to the pile 101, it is also tightly attached to the foundation beam that is parallel to and connected to the pile, forming the conditions for connection, i.e., connection by a group of bolts, thereby further improving the stability of the foundation; when However, the bolts in this bolt group should avoid the locations of the anti-overturning support foot 301 and the foundation support foot 103, which will not be elaborated here. At the same time, the anti-overturning beam 3 extends downward to form an anti-overturning beam connecting wing 303 of the same length as the corresponding foundation beam (excluding the size of the foundation beam connecting plate). The lower part of the corresponding foundation beam 102 extends downward to form a foundation beam connecting wing (not shown in the figure, but it does not affect the understanding of the scheme). The anti-overturning beam connecting wing 303 and the foundation beam connecting wing are overlapped and fixedly connected by the bolt group, which further improves the integrity of the foundation structure and thus improves stability.

[0055] In this embodiment, the end of the bearing beam 2 is tightly attached to the side of the anti-overturning beam 3, as shown in the figure. Both ends of the bearing beam are respectively tightly attached to the inner side of the corresponding anti-overturning beam 3, and cover plates 203 and 203a are respectively attached to the upper and lower surfaces, and are fixedly connected by a bolt group. That is, the bolts of the bolt group can be welded to the bearing beam 2 and the anti-overturning beam 3. The cover plates 203 and 203a (with bolt holes corresponding to the bolts of the bolt group) cover the joint between the bearing beam and the anti-overturning beam on the upper and lower sides, forming a fixed connection through the bolt group, thus completing a stable connection. The left and right sides of the bearing beam 2 (both sides in the width direction of the bearing beam) are connected to the corresponding sides of the anti-overturning beam 3 by angle steel connectors 202 and 202a, respectively. One side flange of 202 and 202a is fixed to the side of the anti-overturning beam 3 by a group of bolts (the bolts of the bolt group can be welded to the anti-overturning beam, or the anti-overturning beam can be welded with nuts and have through holes, both of which are existing mechanical connection structures and will not be described in detail here). The other side flange is fixed to the side of the bearing beam 2 by a group of bolts. Of course, the angle steel connectors 202 and 202a on the left and right sides of the bearing beam 2 can be connected by a bolt group to form a tension connection, or they can be separate bolt groups (the bolts are welded to the bearing beam 2, or the bearing beam can be welded with nuts and have through holes to facilitate the subsequent screwing in of the bolts), both of which can achieve the purpose of the invention. Regardless of the type of bolt connection, it should avoid the setting of other components, such as the bearing support foot 201, etc., which will not be described in detail here.

[0056] In use, the basic structure of this invention consists of a support 4 formed by steel truss units 401 spliced ​​upwards along the width of the bridge 6. The bottom steel truss units are detachably and fixedly connected to the two pile foundations 1, the anti-overturning beam 3, and the load-bearing beam 2. As shown in the figure, the steel truss units 401 have splicing connection parts (generally using connecting flanges) at both the top and bottom. Laterally adjacent steel truss units 401 are also detachably connected. The bottom steel truss units of the support 4 are multiple and spliced ​​along the transverse direction of the bridge, respectively connecting to the two pile foundations 1 (mainly the abutment beam), the anti-overturning beam 3 fixed to the two pile foundations, and the load-bearing beam 2 (generally using flanges and connected via...). (For bolt fixing), during actual construction, the upper surfaces of the pier cap beam, anti-overturning beam, and load-bearing beam should be kept at the same height. However, since the connection between pile foundation 1, anti-overturning beam 3, and load-bearing beam is detachable, there are many connecting components such as the aforementioned cover plate. There may be points with inconsistent heights that are opposite to the corresponding connection points of the bottom steel truss unit 401, such as the aforementioned cover plate 203. In this case, the corresponding connection points of the bottom steel truss unit 401 should be adjusted accordingly, which will not be elaborated here. In addition, the lower connection points of the bottom steel truss unit 401 should avoid the support legs of the pier cap beam, anti-overturning beam, and load-bearing beam to ensure smooth assembly, which will not be elaborated here.

[0057] To ensure connection strength and integrity, the steel truss unit 401 at the bottom, corresponding to the pile body, is welded with connecting plates on both sides in the width direction of the bridge. The connecting plates are fixed to the corresponding pile body by bolt groups. To accommodate the gap between the connecting plates and the pile body, a compensation plate is added to further form a stable connection.

[0058] In this embodiment, the anti-overturning beam 3 is a square box girder, and anti-overturning beam ribs 304 are vertically arranged along the length of the anti-overturning beam, as shown in the figure. Multiple anti-overturning beam ribs 304 can be provided as needed to ensure load-bearing capacity. The ribs are generally fixed by welding. The load-bearing beam 2 is a square box girder, and load-bearing beam ribs 204 are vertically arranged along the length of the load-bearing beam. Similarly, multiple ribs can be provided as needed and fixed by welding.

[0059] As shown in the figure, the heights of the pier beam 102, the anti-overturning beam 3, and the load-bearing beam 2 are consistent. After assembly, the upper and lower surfaces are flush, resulting in good assembly effect and integrity. The anti-overturning connecting plate and the anti-overturning beam connecting wing are both integrally formed and extended from the corresponding side plates of the anti-overturning beam, which helps to ensure the strength of the anti-overturning beam while maintaining integrity. Similarly, the pier beam connecting wing is also integrally formed and extended from the corresponding side plates of the pier beam.

[0060] The construction process of this invention is as follows:

[0061] The process involves clearing loose soil from the surface, driving piles sequentially to the designated depth and reserving connection points, pouring concrete into the piles up to below the tie-down connection positions, hoisting and securing the abutment beam and anti-overturning beam with tie-downs, pouring the tie-down connection portion, hoisting and connecting the load-bearing beam, clearing loose soil from relevant locations, adjusting the anti-overturning support legs, load-bearing support legs, and abutment beam support legs, and then assembling the support frame on the foundation structure and installing the top abutment. This invention features a simple and efficient construction process, with all components being detachable structures, thus improving construction efficiency, shortening the construction period, and allowing the foundation structure to be reused for other bridges or bridges on the opposite side after disassembly, resulting in energy conservation, environmental protection, and cost reduction.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A pile foundation structure for a support system used in bridge construction, characterized in that: This includes pile foundations and detachable anti-overturning beams fixedly installed on the pile foundations; The pile foundation consists of two piles arranged along the width of the bridge, including piles driven into the ground and ground caps that can be detached and fixed to the piles; the two ends of the anti-overturning beam extend along the length of the bridge to form overturning load bearing parts and are supported on the ground. The anti-overturning beam is provided with several anti-overturning support feet, which are supported on the ground. The anti-overturning support feet can be adjusted to move up and down and can be locked onto the anti-overturning beam. Each pile foundation consists of four piles arranged in a rectangular pattern. The ground cap is formed by a cap beam that is detachably and fixedly connected between adjacent piles. There are two anti-overturning beams, which are detachably and fixedly installed on both sides of the pile foundation, parallel to the length of the bridge. The basic structure also includes a load-bearing beam, which is detachably and fixedly connected between the two pile foundations; In use, the bracket is fixedly installed on the two pile foundations, the anti-overturning beam and the load-bearing beam in the width direction of the bridge; The load-bearing beam is provided with a number of load-bearing support feet for supporting the ground, and the load-bearing support feet can be adjusted to move up and down and can be locked onto the load-bearing beam. The pier beam is also provided with pier support feet, including a pier base plate, a pier support rod and a pier adjustment nut. The pier support rod can slide up and down through the pier beam and its bottom end is connected to the pier base plate. The pier adjustment nut is threadedly fitted to the pier support rod and supports the bottom of the pier beam upward. The pier support rod extends upward out of the pier beam and is threadedly fitted with a pier locking nut.

2. The pile foundation structure for bridge construction supports according to claim 1, characterized in that: The anti-tipping support foot includes an anti-tipping base plate, an anti-tipping support rod, and an anti-tipping adjusting nut. The anti-tipping support rod can slide up and down through the anti-tipping beam and its bottom end is connected to the anti-tipping base plate. The anti-tipping adjusting nut is threadedly fitted onto the anti-tipping support rod and supports the bottom of the anti-tipping beam upwards. The anti-tipping support rod extends upwards out of the anti-tipping beam and is threadedly fitted with an anti-tipping locking nut. The load-bearing support foot includes a load-bearing base plate, a load-bearing support rod, and a load-bearing adjusting nut. The load-bearing support rod can slide up and down through the load-bearing beam and its bottom end is connected to the load-bearing base plate. The load-bearing adjusting nut is threadedly fitted onto the load-bearing support rod and supports the bottom of the load-bearing beam upwards. The load-bearing support rod extends upwards out of the load-bearing beam and is threadedly fitted with a load-bearing locking nut.

3. The pile foundation structure for bridge construction supports according to claim 2, characterized in that: Each of the aforementioned anti-tipping support feet includes an anti-tipping base plate and four anti-tipping support rods arranged in a rectangular pattern. The anti-tipping base plate has a predetermined area and is horizontally positioned. The load-bearing support foot includes a load-bearing base plate and four load-bearing support rods arranged in a rectangular shape. The load-bearing base plate is horizontally arranged and has a set contact area with the ground. The support foot of the pedestal includes a pedestal base plate and at least two pedestal support rods. The pedestal base plate is horizontally arranged and has a set contact area with the ground.

4. The pile foundation structure for bridge construction supports according to claim 3, characterized in that: The pile body is a square steel pipe pile, and concrete is poured inside the square steel pipe pile; The pile cap beam is fixed with pile cap beam connecting plates extending upward and downward from its end face close to the pile body. The pile cap beam connecting plates are fixedly connected to the corresponding pile body by a group of bolts. The anti-overturning beam is attached to the outside of the pile body and is fixed with anti-overturning beam connecting plates extending upward and downward. The anti-overturning beam connecting plates and the pile cap beam connecting plates on the opposite side are fixedly connected to the corresponding pile body by the same group of bolts. A reinforcing plate is provided on the opposite side of the connecting plate of the pier beam parallel to the anti-overturning beam, and is fixed to the corresponding pile body by a bolt group.

5. The pile foundation structure for bridge construction supports according to claim 4, characterized in that: The width of the pier cap beam is equal to the width of the side connected to the pile body. The anti-overturning beam is closely attached to the corresponding pier cap beam and is detachably fixed by a group of bolts. The anti-overturning beam extends downward to form an anti-overturning beam connecting wing of the same length as the corresponding pier cap beam. The corresponding pier cap beam extends downward to form a pier cap beam connecting wing. The anti-overturning beam connecting wing and the pier cap beam connecting wing are overlapped and fixedly connected by a group of bolts.

6. The pile foundation structure for bridge construction supports according to claim 5, characterized in that: The end of the load-bearing beam is tightly attached to the side of the corresponding anti-overturning beam. The upper and lower surfaces are respectively covered with a cover plate covering the joint between the load-bearing beam and the anti-overturning beam, and are fixedly connected by a group of bolts. The left and right sides of the load-bearing beam are connected to the side of the anti-overturning beam by angle steel connectors. One wing of the angle steel connector is fixed to the side of the anti-overturning beam by a group of bolts, and the other wing is fixed to the corresponding side of the load-bearing beam by a group of bolts.

7. The pile foundation structure for bridge construction supports according to claim 6, characterized in that: The anti-overturning beam is a square box girder, and anti-overturning beam ribs are vertically arranged along the length of the beam inside the square box girder; the load-bearing beam is a square box girder, and load-bearing beam ribs are vertically arranged along the longitudinal direction of the beam inside the square box girder.

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