Opposite-pulling supporting structure and construction method

Abstract

The invention relates to the technical field of foundation pit edge reinforcing structures, in particular to an opposite-pulling supporting structure and a construction method.The opposite-pulling supporting structure comprises a plurality of foundation piles and a plurality of opposite-pulling anchor rods, the foundation piles are distributed in the front-back direction and vertically and directionally arranged in a foundation, and each opposite-pulling anchor rod comprises a rod body and an anchoring assembly arranged on the rod body; the opposite-pulling anchor rod has the advantages that the opposite-pulling anchor rod tensions the foundation pile and the supporting pile and is further anchored in the foundation through the anchoring assembly besides tensioning the foundation pile and the supporting pile, and therefore the foundation and the existing supporting pile can jointly act to tension the foundation pile, the supporting pile can be tensioned through the anchoring assembly, and the supporting pile can be tensioned through the anchoring assembly. The supporting stability of the foundation piles is greatly improved, the pulling force of the existing supporting piles on the foundation piles is shared, the influence of the opposite-pulling supporting mode on the strength and stability of the existing supporting piles is greatly reduced, and the influence of the supporting structure on the existing building is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of reinforcement structures for foundation pit edges, and in particular to a tension support structure and a construction method. Background Art

[0002] With the accelerated development of urbanization in my country, urban construction is encountering more and more deep foundation pit projects. As construction land becomes increasingly scarce, more and more deep foundation pits need to be constructed in densely built urban areas, and the problem of adjacent deep foundation pit support is inevitable. When the distance between adjacent foundation pits is 10-20m, it is a small clearance. When the small clearance plot is in special circumstances, such as the presence of an upper main structure or a major traffic artery, the plot cannot be excavated and must be retained. Conventional pile-anchor support is no longer applicable due to problems such as the anchoring section of the anchor cable, the anchoring force, and the anchor construction area affecting the foundation piles in the construction area. Therefore, providing a support method that is suitable for this scenario is an urgent problem to be solved. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a tension support structure and a construction method to meet the support requirements of small clearance plots in the prior art.

[0005] (II) Technical solution

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] In the first aspect, the present invention provides a tension support structure, wherein a first foundation pit and a second foundation pit are opened on the foundation, and a plurality of support piles of existing buildings distributed in the front-to-back direction and oriented vertically are pre-buried on one side of the second foundation pit close to the first foundation pit. The tension support structure includes a plurality of foundation piles and a plurality of tension anchor rods, wherein the foundation piles are distributed in the front-to-back direction and oriented vertically in the foundation, and the tension anchor rods are distributed in the front-to-back direction and oriented horizontally; the tension anchor rods include a rod body and an anchoring assembly provided on the rod body, wherein the anchoring assembly can anchor the rod body in the foundation, and the two ends of the rod body are respectively connected to the support piles and the foundation piles so that the support piles tighten the foundation piles through the rod body.

[0008] In a second aspect, the present invention provides a construction method of a tension support structure, including the tension support structure in the above technical solution, and the construction method comprises:

[0009] S1: Setting piles in the foundation;

[0010] S2: Using the geomagnetic control system and horizontal directional drilling rig, the pipe body channel is opened by drilling with slurry, and the pipe body channel is expanded by spraying;

[0011] S3: placing the tube body in the enlarged tube body channel;

[0012] S5: a waist beam is arranged on the side opposite to the support pile and the foundation pile, and the tension anchor rod is passed through the tension channel of the pipe body;

[0013] S6: tighten the tension anchor rod;

[0014] S6 specifically includes:

[0015] S6.1: Rotate the rod so that the anchor assembly anchors the rod into the foundation;

[0016] S6.2: Tighten the connection assembly so that the two ends of the rod body tighten the foundation pile and the support pile respectively.

[0017] (III) Beneficial effects

[0018] The beneficial effects of the present invention are as follows: the tension support structure and construction method of the present invention form a collaborative support system by connecting the support piles of the existing building with the newly installed foundation piles through horizontal tension anchor rods. This structure not only utilizes the support capacity of the existing support piles, but also enhances the stability and safety of the entire support structure through the newly added foundation piles and tension anchor rods. When used for foundation treatment of new projects adjacent to existing buildings, it can effectively reduce the impact on existing buildings while ensuring the safe construction of new projects.

[0019] In addition to tightening the foundation piles and supporting piles, the tension anchor rods are also anchored in the foundation through anchoring components. Therefore, the foundation and existing supporting piles can work together to tighten the foundation piles, thereby greatly improving the support stability of the foundation piles and sharing the tension of the existing supporting piles on the foundation piles, thereby greatly reducing the impact of the tension support form on the strength and stability of the existing supporting piles, thereby reducing the impact of the support structure on existing buildings.

[0020] Under the action of the tension anchor rods and in coordination with the anchoring components, the foundation piles and support piles can further increase the support strength, thereby increasing the structural strength of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the tension support structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the tension anchor rod of the present invention;

[0023] Figure 3 For the present invention Figure 1 A schematic diagram of the structure of the local enlarged structure at A in the middle;

[0024] Figure 4 It is a schematic diagram of the top view of the tension support structure of the present invention.

[0025] [Description of Reference Numerals]

[0026] 100. The first foundation pit;

[0027] 200, the second foundation pit;

[0028] 1. Support piles;

[0029] 2. Foundation piles;

[0030] 3. Tension anchor rod; 31. Rod body;

[0031] 32. Anchor assembly; 321. End flange; 322. Cone block; 323. Cone ring;

[0032] 33. Intermediate casing;

[0033] 4. Pipe body;

[0034] 5. Waist beam;

[0035] 6. Connecting assembly; 61. Pressing plate; 62. Nut; 63. Washer;

[0036] 7. Crown beam;

[0037] 8. Reinforce anchor rods;

[0038] 9. Water-stop curtain. DETAILED DESCRIPTION

[0039] In order to better explain the present invention, so as to facilitate understanding, the following Figure 1-Figure 4 , the present invention is described in detail through specific implementation methods. Figure 1 The orientation is used as a reference.

[0040] Embodiment 1:

[0041] Reference Figure 1-Figure 4 The embodiment of the present invention provides a tension support structure, a first foundation pit 100 and a second foundation pit 200, a side of the second foundation pit 200 close to the first foundation pit 100 is pre-buried with a plurality of support piles 1 of an existing building distributed in the front-to-back direction and oriented vertically, the tension support structure includes a plurality of foundation piles 2 and a plurality of tension anchor rods 3, the foundation piles 2 are all distributed in the front-to-back direction and oriented vertically in the foundation, and the tension anchor rods 3 are distributed in the front-to-back direction and oriented horizontally;

[0042] The tension anchor rod 3 includes a rod body 31 and an anchor assembly 32 arranged on the rod body 31. The anchor assembly 32 can anchor the rod body 31 in the foundation. The two ends of the rod body 31 are respectively connected to the supporting pile 1 and the foundation pile 2, so that the supporting pile 1 tightens the foundation pile 2 through the rod body 31.

[0043] In this embodiment, during the foundation treatment process, a foundation pit needs to be excavated for foundation construction. When the new construction project is adjacent to an existing building, a first foundation pit 100 and a second foundation pit 200 can be excavated on the foundation. A plurality of vertically oriented and front-to-back distributed support piles 1 of the existing building have been pre-buried on the side of the second foundation pit 200 close to the first foundation pit 100. These support piles 1 were originally set up to support the existing building, and will now be used in the support structure of the new construction project. The second foundation pit 200 is opened at the fertilizer trough of the existing building to avoid affecting the strength of the existing building.

[0044] The foundation piles 2 are arranged on the side of the first foundation pit 100 close to the second foundation pit 200. They are also oriented vertically and distributed front and back. These foundation piles 2 are newly installed to enhance the stability of the foundation of the new construction project. The tension anchor rods 3 are horizontally oriented, one end of which is connected to the support piles 1 of the existing building, and the other end is connected to the newly installed foundation piles 2. In this way, the support piles 1 tighten the foundation piles 2 through the tension anchor rods 3 to form an overall stable support structure. The tension anchor rods 3 pass through the gaps between adjacent support piles 1 and adjacent foundation piles 2, and multiple tension anchor rods 3 are arranged along the front and back direction to ensure the comprehensiveness and stability of the support structure, and also enable the anchor rods to make way for the foundation piles 2 and support piles 1.

[0045] By connecting the supporting piles 1 of the existing building with the newly installed foundation piles 2 through the horizontal tension anchor rods 3, a collaborative supporting system is formed. This structure not only utilizes the supporting capacity of the existing supporting piles 1, but also enhances the stability and safety of the entire supporting structure through the newly added foundation piles 2 and tension anchor rods 3. When used for foundation treatment of new projects adjacent to existing buildings, it can effectively reduce the impact on existing buildings while ensuring the safe construction of new projects.

[0046] Moreover, in addition to tightening the foundation piles 2 and the supporting piles 1, the tension anchor rods 3 are also anchored in the foundation through the anchoring assembly 32. Therefore, the foundation and the existing supporting piles 1 can work together to tighten the foundation piles 2, thereby greatly improving the support stability of the foundation piles 2, and sharing the tension of the existing supporting piles 1 on the foundation piles 2, thereby greatly reducing the influence of the tension support form on the strength and stability of the existing supporting piles 1, and thereby reducing the influence of the supporting structure on the existing building.

[0047] Under the action of the tension anchor rod 3 and in cooperation with the anchor assembly 32, the foundation pile 2 and the support pile 1 can further improve the support strength, thereby improving the structural strength of the building.

[0048] In summary, the embodiment of the present invention provides an efficient and safe tension support structure based on the existing support piles 1, which is particularly suitable for new construction projects adjacent to existing buildings.

[0049] Embodiment 2:

[0050] Reference Figure 1-Figure 4 In addition to all the technical solutions of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0051] The tension support structure also includes a tube body 4 corresponding to the tension anchor rod 3 and oriented horizontally. A tube body channel is horizontally opened in the foundation, and the tube body 4 is arranged in the tube body channel to form a tension channel that can accommodate the tension anchor rod 3.

[0052] In this embodiment, in order to construct the support structure more efficiently and ensure that the tension anchor rod 3 can smoothly and stably pass through the gap between the support pile 1 and the foundation pile 2, the embodiment of the present invention provides a tube body 4 in the foundation corresponding to the tension anchor rod 3. These tube bodies 4 are also horizontally oriented, and they provide a clear and easy-to-pass tension channel for the tension anchor rod 3.

[0053] The arrangement of the tube body 4 not only simplifies the installation process of the tension anchor rod 3, but also improves the overall stability and safety of the support structure. Since the tube body 4 provides a fixed path for the tension anchor rod 3, the anchor hole is less likely to collapse after the anchor hole is drilled, so the tension channel can be kept unobstructed, improving the convenience of the arrangement of the tension anchor rod 3.

[0054] By pre-arranging the pipe body 4 in the foundation, construction workers can more accurately and quickly install the tension anchor rod 3, thereby improving the construction convenience and efficiency of the entire support structure. In addition, the arrangement of the pipe body 4 can also reduce the rework and repair costs caused by improper installation of the tension anchor rod 3.

[0055] The construction efficiency of the support structure is significantly improved. Since the pipe body 4 provides a clear installation path for the tension anchor rod 3, the construction workers can complete the construction of the support structure more quickly, thereby reducing the construction cost and time cost.

[0056] In summary, the tension support structure proposed in the embodiment of the present invention further improves the stability and construction efficiency of the support structure by introducing a tube body 4 that corresponds one-to-one to the tension anchor rod 3 and is horizontally oriented, thereby providing an efficient and safe solution for complex foundation treatment scenarios.

[0057] Specifically, the pipe body 4 should have a sufficient inner diameter to meet the requirement of passing through the tension anchor rod 3. In addition, the pipe body 4 can play a role of supporting the foundation in the process of passing through the tension anchor rod 3. After the tension anchor rod 3 passes through the tension channel of the pipe body 4, even if the anchor assembly 32 damages the pipe body 4, there will be no effect.

[0058] Embodiment 3:

[0059] Reference Figure 1-Figure 4In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0060] The anchor assembly 32 includes an end flange 321 which is sleeved on the rod body 31 and fixed in an axial position relative to the rod body 31; a first threaded section is formed on the rod body 31, and the anchor assembly 32 also includes a cone block 322 and a plurality of cone rings 323. The cone rings 323 are sleeved on the rod body 31 along the axial direction of the rod body 31, and the large ends and small ends of adjacent cone rings 323 are nested with each other, the cone block 322 is threadedly connected to the first threaded section, the small end of the cone block 322 can extend from the small end of the cone ring 323 into the cone ring 323, and the large end of the cone ring 323 can axially press against the end flange 321; when the rod body 31 rotates, the cone block 322 can move in a direction close to the cone ring 323 under the drive of the first threaded section, so that the cone block 322 squeezes the small end of the cone ring 323, thereby pressing the mutually nested cone rings 323 against each other and causing the large end of the cone ring 323 to open outward to achieve anchoring.

[0061] In this embodiment, the end flange 321 is connected to the rod body 31 and is fixed in an axial position relative to the rod body 31. It serves as a fixed end of the anchor assembly 32. A first threaded section is formed on the rod body 31 for threaded connection with the cone block 322. The cone block 322 is threadedly connected to the first threaded section and can move with the rotation of the rod body 31. The small end of the cone block 322 is designed to squeeze the small end of the cone ring 323. The cone ring 323 is sleeved on the rod body 31 along the axial direction of the rod body 31, and the large ends and small ends of adjacent cone rings 323 are nested with each other. In this way, the cone rings 323 can be pressed against each other and open outward when squeezed.

[0062] When the rod body 31 rotates, due to the threaded connection between the cone block 322 and the first threaded section, the cone block 322 will move towards the cone ring 323 under the drive of the rod body 31. As the cone block 322 moves, its small end will squeeze the small end of the cone ring 323. Since the large end and the small end of the cone ring 323 are nested with each other, this squeezing will cause a mutual pressing force to be generated between the cone rings 323. As the cone rings 323 are pressed against each other, the large end of the cone ring 323 will open outward, causing the tube body 4 to deform or damage the tube body 4, thereby causing the cone ring 323 to be in close contact with and embedded in the foundation.

[0063] Through the thread transmission and the expansion mechanism of the cone ring 323, the anchor assembly 32 can achieve a fast and efficient anchoring effect, providing a reliable anchoring foundation for the tension anchor rod 3. Due to the use of the threaded connection and the nested cone ring 323, the installation of the anchor assembly 32 is relatively simple and convenient.

[0064] Specifically, in order to enable the cone ring 323 to open more fully, process grooves can be opened along the circumference of the cone ring 323. The process grooves are evenly distributed circumferentially on the cone ring 323, and the side of the process grooves close to the large end of the cone ring 323 is open, thereby ensuring that the cone ring 323 has sufficient deformation.

[0065] A rotating portion, such as an outer hexagonal portion, is also extended from the end of the rod body 31 to facilitate construction workers to rotate the rod body 31 to achieve anchoring of the anchor assembly 32 to the foundation.

[0066] Embodiment 4:

[0067] Reference Figure 1-Figure 4 In addition to all the technical solutions of the above-mentioned embodiment 3, the embodiment of the present invention further has the following technical solutions:

[0068] The contact surface between the cone block 322 and the cone ring 323, the contact surface between adjacent cone rings 323, and the contact surface between the cone ring 323 and the end flange 321 are all anti-rotation surfaces, so as to provide anti-rotation resistance for the cone block 322 when the rod body 31 rotates.

[0069] In this embodiment, when the rod body 31 rotates, if the cone block 322 has no anti-rotation design, it may rotate with the rotation of the rod body 31, which will cause the cone block 322 to be unable to effectively squeeze the small end of the cone ring 323, thereby failing to achieve the expansion and anchoring effect of the cone ring 323. Under the action of the anti-rotation surface, it can ensure that the cone block 322 can move along the axial direction of the rod body 31 without rotating, or maintain a small rotation angle.

[0070] When the cone block 322 squeezes the cone ring 323, the anti-rotation surface can prevent the cone rings 323 from relative rotation or dislocation, thereby ensuring that the cone rings 323 can expand outward evenly and come into close contact with the foundation.

[0071] The anti-rotation surface can be set as a contact surface of a special shape, such as a sawtooth shape, a wave shape, etc., to increase the friction and bite effect between the contact surfaces, thereby more effectively preventing rotation. Additional structures such as protrusions, grooves, etc. can also be added to the contact surface to increase the contact area and friction between the contact surfaces and improve the anti-rotation effect.

[0072] Embodiment 5:

[0073] Reference Figure 1-Figure 4 In addition to all the technical solutions of the above-mentioned embodiment 4, the embodiment of the present invention further has the following technical solutions:

[0074] A second thread segment is also formed on the rod body 31. The anchoring components 32 are arranged in two symmetrical groups on the rod body 31. The other group of anchoring components 32 cooperates with the second thread segment. The first thread segment and the second thread segment have opposite rotation directions.

[0075] In this embodiment, in addition to the first thread segment, a second thread segment is formed on the rod body 31. The two thread segments have opposite rotation directions, that is, one is left-handed and the other is right-handed, so that two groups of anchoring components 32 can be symmetrically arranged.

[0076] The first set of anchoring components 32 cooperates with the first threaded section, and includes components such as a cone block 322, a cone ring 323, and an end flange 321. When the rod body 31 rotates in a certain direction, the cone block 322 of the first set of anchoring components 32 will move toward the cone ring 323 driven by the first threaded section, thereby squeezing the cone ring 323 and achieving an anchoring effect.

[0077] The second set of anchoring components 32 cooperates with the second thread segment, and its structure and function are the same as the first set, but it is arranged on the other side of the rod body 31. Since the rotation direction of the second thread segment is opposite to that of the first thread segment, when the rod body 31 rotates in the opposite direction, the cone block 322 of the second set of anchoring components 32 will move towards the direction close to its corresponding cone ring 323 under the drive of the second thread segment, and the same anchoring effect is achieved.

[0078] By arranging two groups of anchoring assemblies 32 at symmetrical positions, the anchoring force can be distributed more evenly, thereby improving the overall stability of the anchoring, which helps to ensure that the tension support structure can remain stable when subjected to soil pressure.

[0079] Furthermore, since the two groups of anchoring assemblies 32 are symmetrically arranged, after the anchoring assemblies 32 take effect, one group of anchoring assemblies 32 can bear the tension directed toward the supporting pile 1, and the other group of anchoring assemblies 32 can bear the tension directed toward the foundation pile 2. Even if the anchoring assemblies 32 become loose, the connection between the tensioning anchor rods 3 and the foundation piles 2 and the supporting piles 1 can be relied upon to ensure that the supporting piles 1 can tighten the foundation piles 2, thereby achieving multiple protections for the foundation pile 2 support and improving the reliability of the foundation pile 2 support.

[0080] The tension anchor rod 3 also includes an intermediate sleeve 33 sleeved on the rod body 31, and two axial ends of the intermediate sleeve 33 form two end flanges 321. When the two sets of anchoring components 32 are locked, the corresponding cone rings 323 will press against the corresponding intermediate sleeve 33, so that the intermediate sleeve 33 is in a balanced state, which can ensure that the positions of the two end flanges 321 remain unchanged.

[0081] Embodiment 6:

[0082] Reference Figure 1-Figure 4 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0083] The tension support structure also includes two groups of front-to-back oriented waist beams 5, which are respectively located on the side opposite to the foundation pile 2 and the existing supporting pile 1. The two ends of the tension anchor rod 3 are correspondingly connected to the two groups of waist beams 5, so that the two groups of waist beams 5 press against the corresponding foundation pile 2 and the existing supporting pile 1, and then the supporting pile 1 tightens the foundation pile 2 through the tension anchor rod 3.

[0084] In this embodiment, the two ends of the tension anchor 3 are respectively connected to two sets of waist beams 5. When the tension anchor 3 is subjected to tension, it transmits the tension to the foundation pile 2 and the existing support pile 1 through the waist beam 5, so that they are subjected to uniform pressure. This connection method not only improves the overall stability of the support structure, but also avoids structural damage caused by excessive local stress.

[0085] The tension anchor rods 3 transmit the tension by connecting the waist beams 5, making the support structure more uniform and stable when subjected to stress, thus avoiding structural damage caused by excessive local stress and improving the overall durability of the support structure.

[0086] Embodiment 7:

[0087] Reference Figure 1-Figure 4 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0088] The tension support structure further includes a connection assembly 6, wherein the first thread segment is close to the foundation pile 2 and extends toward the foundation pile 2, and the second thread segment is close to the support pile 1 and extends toward the support pile 1. The corresponding connection assembly 6 locks the corresponding first thread segment and the second thread segment to the corresponding foundation pile 2 and the support pile 1, so that the two ends of the rod body 31 tighten the foundation pile 2 and the support pile 1 respectively;

[0089] The connecting assembly 6 includes a pressure plate 61 and a nut 62, both of which are located on the opposite sides of the two waist beams 5. The nut 62 is threadedly connected to the corresponding first thread segment and the second thread segment to press the pressure plate 61 against the corresponding waist beam 5; the connecting assembly 6 also includes a washer 63 arranged between the pressure plate 61 and the nut 62.

[0090] In this embodiment, both ends of the rod body 31 can be threadedly connected to the nut 62 , thereby achieving a fastening effect on the pressure plate 61 and the waist beam 5 .

[0091] Both ends of the rod body 31 pass through the corresponding pressing plates 61 respectively, and then the pressing plates 61 and nuts 62 are installed on the opposite sides of the two waist beams 5. The nuts 62 are threadedly connected to the corresponding first thread segment and the second thread segment. As the nuts 62 are tightened, the pressing plates 61 are gradually pressed against the corresponding waist beams 5. This connection method not only ensures a tight connection between the tension anchor rod 3 and the waist beam 5, but also provides sufficient tightening force to resist external loads and deformation.

[0092] That is, the first thread segment and the second thread segment are not only used for threaded connection of the cone block 322, but also for connecting the nut 62, thereby reducing the process cost.

[0093] A washer 63 is provided between the pressing plate 61 and the nut 62. The washer 63 can disperse the pressure of the nut 62 on the pressing plate 61 to prevent the pressing plate 61 from being damaged due to excessive local stress. At the same time, the washer 63 can also prevent loosening to ensure that the connecting assembly 6 remains stable during long-term use.

[0094] The connection assembly 6 ensures a firm connection between the tension anchor rod 3 and the waist beam 5 through the coordinated action of the pressure plate 61, the nut 62 and the washer 63, thereby improving the overall rigidity and bearing capacity of the support structure.

[0095] The design of the connecting assembly 6 makes the installation and removal of the tension anchor rod 3 more convenient and quick. The construction personnel can simply tighten or loosen the nut 62 to achieve the connection or separation between the tension anchor rod 3 and the waist beam 5, thereby improving the construction efficiency.

[0096] The waist beam 5 is provided with a waist hole extending in the front-to-back direction, and the rod body 31 passes through the waist hole.

[0097] In this embodiment, the main function of the waist hole is to allow the rod body 31 of the tension anchor rod 3 to pass through, so as to realize the connection between the tension anchor rod 3 and the waist beam 5. The design of the waist hole enables the tension anchor rod 3 to be flexibly positioned and adjusted on the waist beam 5 to adapt to different construction requirements and foundation conditions. The construction personnel can adjust the front and rear positions of the tension anchor rod 3 in the waist hole as needed to adapt to the position requirements of the anchor rod, thereby improving the adaptability of the waist beam 5 to the front and rear positions of the anchor rod.

[0098] Embodiment 8:

[0099] Reference Figure 1-Figure 4 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0100] The waist beam 5 is configured as an integrated structure oriented forward and backward. All the supporting piles 1 correspond to one group of waist beams 5 , and all the foundation piles 2 correspond to another group of waist beams 5 .

[0101] In this embodiment, the waist beam 5 is designed as an integrated structure oriented forward and backward, that is, the waist beam 5 extends in the length direction and covers all the support piles 1 or foundation piles 2. This arrangement simplifies the construction of the support structure, reduces the number of waist beams 5, and reduces the construction cost. At the same time, since the waist beams 5 are an integrated structure oriented forward and backward, they can effectively connect the support piles 1 and the foundation piles 2 together to form an integrated support system, which helps to improve the overall rigidity and stability of the support structure, so that it can better resist external loads and deformation.

[0102] Since the support piles 1 and the foundation piles 2 correspond to only one set of waist beams 5, the construction of the support structure is greatly simplified. At the same time, the number of waist beams 5 is reduced, and the construction cost and time cost are reduced.

[0103] The integrated structural design of the waist beam 5 and the convenient connection mode of the tension anchor rod 3 make the construction of the support structure simpler and more efficient. The construction personnel can quickly pass the tension anchor rod 3 through the waist hole and use the connection assembly 6 to fix it on the waist beam 5, thereby improving the construction efficiency.

[0104] Embodiment 9:

[0105] Reference Figure 1-Figure 4 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0106] The tension support structure further includes a front-to-rear oriented crown beam 7 , which is fixedly connected to the top ends of all the foundation piles 2 ; the crown beam 7 is welded to the foundation piles 2 .

[0107] In this embodiment, the crown beam 7 is connected to the foundation piles 2 by welding. Through welding, the crown beam 7 can effectively connect the foundation piles 2 into a whole, forming a more stable support structure.

[0108] The setting of the crown beam 7 not only enhances the stability of the support structure at the top, but also cooperates with other components in the tension support structure, such as the waist beam 5 and the tension anchor rod 3, to jointly resist external loads and deformation. When the support structure is subjected to load, the crown beam 7 can disperse and transfer the load, reduce the stress of the foundation pile 2 and the support pile 1, and thus improve the bearing capacity and stability of the entire support structure.

[0109] The provision of the crown beam 7 provides additional support and reinforcement to the top of the support structure, thereby enhancing the stability and integrity of the entire support structure, which helps prevent structural damage caused by foundation deformation or external loads.

[0110] The strong connection between the cap beam 7 and the foundation pile 2 enables the support structure to better withstand external loads. When the support structure is subjected to loads, the cap beam 7 can disperse and transfer the loads, reduce the stress on the foundation pile 2 and the support pile 1, and thus improve the bearing capacity of the entire support structure.

[0111] The crown beam 7 is connected to the foundation pile 2 by welding, which is simple and fast, and can greatly shorten the construction period. At the same time, the provision of the crown beam 7 also reduces the need for additional supporting structures, further simplifies the construction process and improves construction efficiency.

[0112] Embodiment 10:

[0113] Reference Figure 1-Figure 4 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0114] The tension support structure also includes a reinforcement anchor rod 8, one end of which is connected to the foundation pile 2, and the other end is extended and anchored in the foundation, and the reinforcement anchor rod 8 makes way for the support pile 1 and the existing building.

[0115] In this embodiment, the reinforcement anchor rod 8 is an anchor that penetrates deep into the foundation, one end of which is connected to the foundation pile 2, and the other end extends and anchored inside the foundation. It not only strengthens the connection between the supporting structure and the foundation, but also helps to effectively transfer the load of the supporting structure to the foundation, thereby improving the overall stability.

[0116] When arranging the reinforcement anchor rods 8, special attention should be paid to avoiding the positions of the support piles 1 and the existing buildings. This is to ensure that the installation of the reinforcement anchor rods 8 will not cause any damage to the existing support piles 1 and the existing buildings, while ensuring the integrity and safety of the support structure.

[0117] The reinforcement anchor rod 8 works together with other components in the tension support structure to form a stable support system. When the support structure is subjected to external loads, the reinforcement anchor rod 8 can effectively transfer the load to the foundation, reduce the stress on the support piles 1 and the foundation piles 2, and thus improve the bearing capacity and stability of the entire support structure.

[0118] Embodiment 11:

[0119] Reference Figure 1-Figure 4 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0120] The tension support structure further includes a water-stopping curtain 9 located between the first foundation pit 100 and the second foundation pit 200 . The water-stopping curtain 9 is vertically oriented and extends forward and backward. The tension channel passes through the water-stopping curtain 9 .

[0121] In this embodiment, the water-stop curtain 9 is designed as a vertically oriented and front-to-back extending structure, and is located between the first foundation pit 100 and the second foundation pit 200. Its main function is to prevent groundwater from penetrating from the outside of the foundation pit into the inside of the foundation pit, thereby maintaining a dry environment inside the foundation pit, which is conducive to the normal progress of construction and the stability of the support structure.

[0122] In order to meet the connection requirements between the support piles 1 and the foundation piles 2 in the tension support structure, the tension channel is designed to pass through the water-stop curtain 9. This requires the water-stop curtain 9 to have a certain flexibility and sealing at the position of the tension channel to ensure that groundwater does not penetrate into the foundation pit through the channel.

[0123] The water-stop curtain 9 works together with other components in the tension support structure, such as the support pile 1, the foundation pile 2, the waist beam 5, the tension anchor rod 3, the reinforcement anchor rod 8, etc., to form a stable support system. The existence of the water-stop curtain 9 effectively blocks the influence of groundwater, so that the support structure can better resist external loads and deformation, and improve the overall stability.

[0124] Embodiment 12:

[0125] Reference Figure 1-Figure 4 The embodiment of the present invention provides a construction method of a tension support structure, using the tension support structure of claim 8 or 9, the construction method comprising:

[0126] S1: Setting piles 2 in the foundation;

[0127] S2: Using the geomagnetic control system and horizontal directional drilling rig, the pipe body channel is opened by drilling with slurry, and the pipe body channel is expanded by spraying;

[0128] In this way, the position of the directional drilling rig's drill bit can be observed in real time through the geomagnetic control system to ensure that the drilling direction and depth can be controlled in real time, solve the problem of the anchor drilling rig running off the track due to geological conditions and other reasons, and also solve a series of problems faced by the existing technology in trench excavation, such as groundwater and instability of the trench section slope.

[0129] In addition, slurry drilling and grouting expansion can ensure that the pipe channel is effectively supported during the hole opening and expansion process, play a wall protection role, and prevent problems such as hole collapse.

[0130] S3: placing the pipe body 4 in the expanded pipe body channel, for example, while the hole is being expanded by spraying, the pipe body 4 can be pulled back to form a hole, and the pipe body 4 can be made of a PVC pipe;

[0131] S5: a waist beam 5 is arranged on the side opposite to the support pile 1 and the foundation pile 2, and the tension anchor rod 3 is passed through the tension channel of the pipe body 4;

[0132] S6: tighten the tension anchor rod 3;

[0133] S6 specifically includes:

[0134] S6.1: Rotate the rod body 31 so that the anchor assembly 32 anchors the rod body 31 in the foundation;

[0135] S6.2: Lock the connection assembly 6 so that the two ends of the rod body 31 tighten the foundation pile 2 and the supporting pile 1 respectively.

[0136] Under the action of S6, the tension anchor rod 3 not only tightens the foundation pile 2 and the supporting pile 1, but is also anchored in the foundation through the anchor assembly 32. Therefore, the foundation and the existing supporting pile 1 can work together to tighten the foundation pile 2, thereby realizing multiple supports for the foundation pile 2, thereby greatly improving the support stability of the foundation pile 2, and sharing the tension of the existing supporting pile 1 on the foundation pile 2, reducing the influence of the tension support form on the strength and stability of the existing supporting pile 1, thereby reducing the influence of the supporting structure on the existing building.

[0137] It can be understood that, except for any conflicting parts, the above-mentioned embodiments 1-9 can be freely combined to form other implementation modes of the present invention.

[0138] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0139] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0140] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0141] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0142] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A tension support structure, wherein a first foundation pit (100) and a second foundation pit (200) are provided on the foundation, wherein a plurality of support piles (1) of an existing building distributed in a front-to-rear direction and oriented vertically are pre-buried on a side of the second foundation pit (200) close to the first foundation pit (100), characterized in that: The tension support structure comprises a plurality of foundation piles (2) and a plurality of tension anchor rods (3), wherein the foundation piles (2) are all distributed in the front-rear direction and vertically oriented in the foundation, and the tension anchor rods (3) are distributed in the front-rear direction and horizontally oriented; The tension anchor rod (3) comprises a rod body (31) and an anchor assembly (32) arranged on the rod body (31); the anchor assembly (32) can anchor the rod body (31) in the foundation to form a primary connection; the two ends of the rod body (31) are respectively connected to the support pile (1) and the foundation pile (2); the support pile (1) tightens the foundation pile (2) through the rod body (31) to form a secondary connection.

2. The tension support structure according to claim 1, characterized in that: It also includes a tube body (4) corresponding to the tension anchor rod (3) one by one and oriented horizontally, a tube body channel is horizontally opened in the foundation, and the tube body (4) is arranged in the tube body channel to form a tension channel in the tube body (4) through which the tension anchor rod (3) passes.

3. The tension support structure according to claim 2, characterized in that: The anchor assembly (32) comprises an end flange (321), a cone block (322) and a plurality of cone rings (323); The end flange (321) is sleeved on the rod body (31) and is fixed in an axial position relative to the rod body (31); A first threaded section is formed on the rod body (31), the cone ring (323) is sleeved on the rod body (31) along the axial direction of the rod body (31), and the large ends and small ends of adjacent cone rings (323) are nested with each other, the cone block (322) is threadedly connected to the first threaded section, the small end of the cone block (322) can extend from the small end of the cone ring (323) into the cone ring (323), and the large end of the cone ring (323) can be axially pressed against the end flange (321); When the rod body (31) rotates, the cone block (322) can be driven by the first threaded section to move towards the cone ring (323), so that the cone block (322) squeezes the small end of the cone ring (323), thereby pressing the mutually nested cone rings (323) against each other and causing the large end of the cone ring (323) to open outward.

4. The tension support structure according to claim 3, characterized in that: The contact surface between the cone block (322) and the cone ring (323), the contact surface between the adjacent cone rings (323), and the contact surface between the cone ring (323) and the end flange (321) are all anti-rotation surfaces, so as to provide anti-rotation resistance for the cone block (322) when the rod body (31) rotates.

5. The tension support structure according to claim 3, characterized in that: A second thread segment is also formed on the rod body (31), and the anchoring components (32) are arranged in two symmetrical groups on the rod body (31). The anchoring components (32) cooperate with the second thread segment, and the first thread segment and the second thread segment have opposite rotation directions.

6. The tension support structure according to claim 5, characterized in that: The tension anchor rod (3) further comprises an intermediate sleeve (33) sleeved on the rod body (31), and two axial ends of the intermediate sleeve (33) form two end flanges (321).

7. The tension support structure according to claim 6, characterized in that: It also includes two groups of waist beams (5) oriented forward and backward, the two groups of waist beams (5) are respectively located on the side opposite to the foundation pile (2) and the existing support pile (1), and the two ends of the tension anchor rod (3) are correspondingly connected to the two groups of waist beams (5), so that the two groups of waist beams (5) press against the corresponding foundation pile (2) and the support pile (1), thereby allowing the support pile (1) to tighten the foundation pile (2) through the tension anchor rod (3).

8. The tension support structure according to claim 7, characterized in that: It also comprises two groups of connection components (6), wherein the first threaded section is close to the foundation pile (2) and extends toward the foundation pile (2), and the second threaded section is close to the support pile (1) and extends toward the support pile (1), and the corresponding connection components (6) lock the corresponding first threaded section and the second threaded section to the corresponding foundation pile (2) and the support pile (1), so that the two ends of the rod body (31) respectively tighten the foundation pile (2) and the support pile (1); The connecting assembly (6) comprises a pressing plate (61) and a nut (62), wherein the pressing plate (61) and the nut (62) are both located on opposite sides of the two waist beams (5), and the nut (62) is threadedly connected to the corresponding first thread segment and the second thread segment to press the pressing plate (61) against the corresponding waist beam (5); The connection assembly (6) further comprises a washer (63) arranged between the pressure plate (61) and the nut (62).

9. The tension support structure according to any one of claims 1 to 8, characterized in that: It also includes a reinforcement anchor rod (8), one end of which is connected to the foundation pile (2), and the other end is extended and anchored in the foundation, and the reinforcement anchor rod (8) makes way for the support pile (1) and the existing building.

10. A construction method for a tension support structure, characterized in that: Using the tension support structure described in claim 8, the construction method comprises the following steps: S1: Arranging the foundation piles (2) in the foundation; S2: using a geomagnetic control system and a horizontal directional drill to open the pipe body channel by drilling with slurry, and expanding the pipe body channel by grouting; S3: placing the tube body (4) in the enlarged tube body channel; S5: the waist beam (5) is arranged on the side opposite to the support pile (1) and the foundation pile (2), and the tension anchor rod (3) is passed through the tension channel of the pipe body (4); S6: tightening the tension anchor rod (3); The S6 specifically includes: S6.1: Rotate the rod body (31) so that the anchor assembly (32) anchors the rod body (31) in the foundation; S6.2: Tighten the connection assembly (6) so that the two ends of the rod body (31) respectively tighten the foundation pile (2) and the support pile (1).

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