A new type of pile-anchor support structure and construction method

Abstract

The present invention provides a novel pile-anchor support structure and a construction method. The novel pile-anchor support structure is used to support a foundation pit; it includes a fixing assembly, a supporting assembly and an anchor assembly. The fixing assembly is used to be fixedly arranged in a rock layer. The supporting assembly is vertically arranged at the edge of the foundation pit to be excavated. The anchor assembly includes a pier, a crown beam, a waist beam and an anchor cable. The pier is arranged at one end of the fixing assembly away from the rock layer, the crown beam is arranged at one end of the supporting assembly away from the rock layer, and the pier and the crown beam are arranged horizontally, and an anchor cable is arranged between the pier and the crown beam. The waist beam is arranged on one side of the supporting assembly away from the fixing assembly, and an anchor cable is arranged between the waist beam and the pier. In the novel pile-anchor support structure provided by the present invention, the anchor cable does not need to be consolidated with the soil layer, and the overall instability and damage of the foundation pit will not occur because the anchoring force between the anchor cable and the soil layer does not meet the design requirements, thereby improving the construction quality.

Description

Technical Field

[0001] The present invention relates to the field of construction, and in particular to a novel pile-anchor support structure and a construction method. Background Art

[0002] Pile-anchor support structure is a common civil engineering technology used to support soil or rock in foundation pit excavation or slope stabilization projects to prevent it from collapsing or sliding. This structure usually consists of two parts: piles (usually bored piles or precast piles) and anchors (or anchor cables).

[0003] In the related technology, the pile-anchor support structure mainly relies on the anchoring force between the anchor cable and the stratum to restrain the deformation of the foundation pit. This method is difficult to give full play to the tensile strength of the anchor cable's own material, and its pull-out resistance is mainly determined by the friction between the anchor section and the rock stratum.

[0004] The anchor cable is divided into a free section and an anchoring section, and its inclination angle is usually downward relative to the pile row. Among them, the free section is not consolidated with the soil layer, and the anchoring section forms an anchoring force with the soil layer through grouting. If the properties of the soil layer are too poor, such as soft soil or sand, the length of the anchoring section often needs to be very long, and it is easy to cause the overall instability and damage of the foundation pit because the anchoring force of the anchor cable does not meet the design requirements. Summary of the invention

[0005] In order to overcome the defects existing in the related art, the present invention provides a novel pile-anchor support structure and a construction method.

[0006] The embodiment of the present invention is achieved as follows:

[0007] A new type of pile-anchor support structure is used to support a foundation pit; it includes a fixing assembly, a supporting assembly and an anchor cable assembly. The fixing assembly is used to be fixedly set in a rock formation. The supporting assembly is vertically set at the edge of the foundation pit to be excavated. The anchor cable assembly includes a pier, a crown beam, a waist beam and an anchor cable. The pier is set on one end of the fixing assembly away from the rock formation, the crown beam is set on one end of the supporting assembly away from the rock formation, and the pier and the crown beam are set horizontally, and the anchor cable is set between the pier and the crown beam. The waist beam is set on a side of the supporting assembly away from the fixing assembly, and the anchor cable is set between the waist beam and the pier.

[0008] In some embodiments, exemplarily, a plurality of waist beams are provided on the support assembly, and the plurality of waist beams are extended in a vertical direction away from the crown beam. An anchor cable is provided between each waist beam and the pier.

[0009] In some embodiments, the anchor cables are inserted into the waist beam and extend from a side of the waist beam away from the pier. A connecting piece is provided on the waist beam, and one end of the anchor cable extending out of the waist beam is perpendicularly arranged to the connecting piece.

[0010] In some embodiments, the connecting member includes a fixed plate and an adjusting plate, the fixed plate is arranged on the waist beam, the adjusting plate is hingedly arranged on the fixed plate, and the adjusting plate can be relatively fixed with the fixed plate. The anchor cable is sequentially passed through the fixed plate and the adjusting plate, and the anchor cable is arranged perpendicular to the adjusting plate.

[0011] In some embodiments, the fixing assembly includes an end and an inclined column, the end is fixedly disposed in the rock formation, and the inclined column is detachably disposed on the end. The fixing assembly is inclined in a direction away from the support assembly, the distance between the end and the support assembly is L1, and the distance between the buttress and the support assembly is L2, satisfying: L1<L2.

[0012] In some embodiments, exemplarily, a first through slot is defined in the end head, a second through slot is defined in the inclined column, and the first through slot and the second through slot are not connected to each other.

[0013] In some embodiments, exemplarily, the fixing assembly further includes a sleeve, and the end head and the inclined column are both detachably plugged into the sleeve.

[0014] In some embodiments, exemplarily, a pier connection seat is provided on the end of the inclined column away from the end head, and the pier is provided on the pier connection seat.

[0015] In some embodiments, exemplarily, the anchor cable assembly further includes a protective tube, the protective tube is disposed between the pier and the crown beam and the waist beam, and the anchor cable is inserted into the protective tube.

[0016] The present invention also provides a novel pile-anchor support structure construction method, using the novel pile-anchor support structure described in any one of the above embodiments, the construction method comprising:

[0017] The support assembly is arranged at the edge of a foundation pit to be excavated, and the cap beam is arranged on an end of the support assembly away from the rock formation.

[0018] A hole is drilled in the rock formation and the fixing assembly is fixed in the hole. The pier is arranged on one end of the fixing assembly away from the rock formation. The soil on one side of the pier away from the supporting assembly is cleaned to reserve operating space.

[0019] The pier and the frame of the crown beam are connected by the anchor cable. After the connection is completed, a suitable number of connection holes are reserved on the frame of the pier, and the frame of the pier and the crown beam are cast to form the pier and the crown beam.

[0020] Start digging the foundation pit. After digging to a suitable depth, set the waist beam on the side of the support component away from the fixed component, and connect the pier and the waist beam skeleton through the anchor cable. After the connection is completed, cast the waist beam skeleton to form the waist beam.

[0021] Continue to dig the foundation pit, and after digging to a suitable depth, set the next waist beam on the side of the support assembly away from the fixing assembly, and repeat the above operation until the foundation pit is excavated.

[0022] When the foundation pit operation is completed and the supporting assembly and the fixing assembly need to be removed, the waist beam is removed from bottom to top, the anchor cable is recovered, and the next waist beam is removed until the waist beam is completely removed, the crown beam is removed, the anchor cable is recovered, the pier is broken, and the fixing assembly is recovered.

[0023] The beneficial effects of the embodiments of the present invention are:

[0024] The novel pile-anchor support structure provided by the present invention, when in use, sets the support assembly at the edge of the foundation pit to be opened, and fixes the fixing assembly at a suitable position of the rock formation. Afterwards, reserved holes are set on the piers and the crown beams along the direction from the piers to the crown beams, and anchor cables are passed through the holes to connect the piers and the crown beams. After the piers and the crown beams are connected, start digging the foundation pit downwards. After digging to a suitable depth, set a waist beam on the support assembly, and both the waist beam and the piers are provided with reserved holes, and pass the anchor cables through the holes to connect the piers and the waist beams. After the connection is completed, continue to dig the foundation pit downwards, and repeat the above operation to set multiple waist beams until the foundation pit is excavated.

[0025] The new type of pile-anchor support structure provided by the present invention can limit the support component through the anchor cable, thereby restraining the deformation of the foundation pit. Among them, the anchor cable does not need to be consolidated with the soil layer, and can give full play to its own tensile properties, provide a greater horizontal force for the support structure, and effectively restrain the deformation of the support structure. It will not appear that the anchoring force between the anchor cable and the soil layer fails to meet the design requirements due to various reasons, which will cause the foundation pit to become unstable and damaged as a whole, thereby improving the construction quality. In addition, during the construction process, there is no need to consider the properties of the soil layer, and the anchor cable does not need to be set with a longer anchoring section, which effectively saves the required space and reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic structural diagram of a novel pile-anchor supporting structure from one perspective according to an embodiment of the present invention;

[0028] Figure 2 A schematic structural diagram of a novel pile-anchor supporting structure from another perspective according to an embodiment of the present invention;

[0029] Figure 3 A novel pile anchor support structure according to an embodiment of the present invention Figure 2 A partial enlarged view of the middle A;

[0030] Figure 4 A structural schematic diagram of a fixing assembly according to an embodiment of the present invention from one perspective;

[0031] Figure 5 The fixing assembly of the embodiment of the present invention Figure 4 A partial enlarged view of point B in the middle.

[0032] icon:

[0033] 100-fixing assembly; 110-end; 111-limiting hole; 120-inclined column; 121-handle; 122-push plate; 123-limiting block; 130-casing; 200-support assembly; 300-anchor assembly; 310-buttress; 320-crown beam; 330-waist beam; 340-anchor; 350-connector; 351-adjusting plate; 352-fixing plate; 500-soil. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of 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.

[0040] The present application provides a novel pile-anchor support structure to solve the problem in the related art that the anchoring section of the anchor cable is long, is easily affected by the soil layer, and the anchoring force between the anchor cable and the soil layer does not meet the standard, resulting in overall instability and damage of the foundation pit.

[0041] See also Figures 1 to 3A new type of pile-anchor support structure is used to support a foundation pit; it includes a fixing assembly 100, a supporting assembly 200 and an anchor assembly 300. The fixing assembly 100 is used to be fixedly set in the rock formation. The supporting assembly 200 is vertically set at the edge of the foundation pit to be excavated. The anchor assembly 300 includes a pier 310, a crown beam 320, a waist beam 330 and an anchor cable 340. The pier 310 is set on the end of the fixing assembly 100 away from the rock formation, the crown beam 320 is set on the end of the supporting assembly 200 away from the rock formation, and the pier 310 and the crown beam 320 are horizontally arranged, and an anchor cable 340 is arranged between the pier 310 and the crown beam 320. The waist beam 330 is set on the side of the supporting assembly 200 away from the fixing assembly 100, and an anchor cable 340 is arranged between the waist beam 330 and the pier 310.

[0042] Specifically, when using the new type of pile-anchor support structure of this embodiment, first, the support assembly 200 is vertically set at the edge of the foundation pit to be excavated, and the foundation pit is supported and constrained to prevent the foundation pit from deformation. After that, the fixing assembly 100 is fixedly set in the rock layer on the side of the support assembly 200 away from the foundation pit. Next, the pier 310 is set at the end of the fixing assembly 100 away from the rock layer, and the crown beam 320 is set at the end of the support assembly 200 away from the soil layer. After the setting is completed, holes are opened in the pier 310 and the crown beam 320 in sequence along the direction from the pier 310 to the crown beam 320, and the anchor cable 340 is passed through the opening, and the two ends of the anchor cable 340 are respectively fixed on the pier 310 and the crown beam 320. The fixing assembly 100 can constrain the support assembly 200 through the tensile resistance of the anchor cable 340 itself. The anchor cable 340 provides horizontal tension for the supporting structure, and the horizontal tension exerted on the anchor cable 340 is transmitted to the rock formation through the inclined column 120 .

[0043] After the restriction of the crown beam 320 is completed, the foundation pit is dug on the side of the support component 200 away from the fixed component 100. After digging downward for a certain distance, a waist beam 330 is set on the support component 200 in the foundation pit, and holes are opened on the pier 310 and the waist beam 330 in turn along the direction from the pier 310 to the waist beam 330, and the anchor cable 340 is passed through the openings. The two ends of the anchor cable 340 are respectively fixed on the pier 310 and the waist beam 330, so that the waist beam 330 cooperates with the crown beam 320 to jointly restrict the support component 200.

[0044] After the waist beam 330 is constrained, the foundation pit continues to be excavated downwards. After a certain distance is excavated downwards, the above operation is repeated to set the next waist beam 330 until the foundation pit is excavated.

[0045] It should be noted that after the support assembly 200 and the fixing assembly 100 are set, the soil 500 on the side of the fixing assembly 100 away from the support assembly 200 needs to be cleaned, and the cleaned soil 500 can be roughly flat with the end of the fixing assembly 100, so as to reserve space for the installation of the pier 310 and subsequent operations related to the pier 310. In this way, during the construction process of this embodiment, construction work can be carried out directly above the foundation pit, which greatly improves the construction convenience and efficiency.

[0046] In the related art, it is necessary to drill holes in the soil 500, insert the anchoring section of the anchor cable 340, grout, and wait for the slurry to solidify to reach a certain strength, so that the anchor cable 340 can be consolidated with the soil 500 through the slurry before construction can be carried out. Since the anchoring section is usually long and occupies a large space, the grouting cools slowly, resulting in an extremely long construction period. In this embodiment, the anchor cable 340 is directly connected to the pier 310 and the crown beam 320, and is not consolidated with the soil 500. After the anchor cable 340 is connected and prestressed, the soil can be directly excavated, which can greatly shorten the construction period and improve construction efficiency.

[0047] In some embodiments, for example, Figure 1 , Figure 2 As shown, a plurality of waist beams 330 are provided on the support assembly 200, and the plurality of waist beams 330 are extended in a vertical direction away from the crown beam 320. An anchor cable 340 is provided between each waist beam 330 and the buttress 310.

[0048] The support assembly 200 is configured as a support pile, and a plurality of support piles are arranged side by side according to the actual situation of the foundation pit. The crown beam 320 is arranged on the top of the support pile to restrict the support pile. A plurality of waist beams 330 are arranged, and the plurality of waist beams 330 are vertically and evenly arranged on the support pile, which can cooperate with the crown beam 320, so that the fixing assembly 100 can fully restrict the support pile, ensure that the support pile will not be displaced during use, and improve the reliability of this embodiment.

[0049] In some embodiments, for example, Figures 1 to 3As shown, the anchor cables 340 are all inserted into the waist beam 330 and extend from the side of the waist beam 330 away from the pier 310. The waist beam 330 is provided with a connector 350, and one end of the anchor cable 340 extending out of the waist beam 330 is arranged perpendicular to the connector 350. The anchor cable 340 is inserted into the waist beam 330 and extends from the waist beam 330, ensuring that the pier 310 can pass through the anchor cable 340, and the waist beam 330 generates a limiting force in the direction of the pier 310 to prevent the displacement of the supporting pile. By vertically connecting the anchor cable 340 and the connector 350, the tension of the anchor cable 340 can be better transmitted to the supporting structure, thereby improving the overall stability of the supporting structure. The vertically arranged anchor cable 340 and the connector 350 can conveniently adjust the tension, ensuring that the anchor cable 340 is always in an ideal tension state, thereby improving the reliability of the supporting structure. The vertically arranged anchor cable 340 is convenient for long-term monitoring after the construction is completed, and is also convenient for daily inspection and maintenance.

[0050] In some embodiments, for example, Figure 3 As shown, the connecting member 350 includes a fixed plate 352 and an adjusting plate 351. The fixed plate 352 is arranged on the waist beam 330, and the adjusting plate 351 is hingedly arranged on the fixed plate 352. The adjusting plate 351 can be relatively fixed to the fixed plate 352. The anchor cable 340 is sequentially inserted into the fixed plate 352 and the adjusting plate 351, and the anchor cable 340 is vertically arranged with the adjusting plate 351. The hinged adjusting plate 351, the relative position between the adjusting plate 351 and the fixed plate 352 can be freely adjusted, so as to ensure that the anchor cable 340 can be vertically arranged with the adjusting plate 351 no matter at which angle it is extended, thereby reducing the construction difficulty of this embodiment, and enabling the anchor cable 340 to always be in a suitable working state, thereby ensuring that the supporting structure is in an ideal working state.

[0051] In addition, this arrangement makes the installation of the anchor cable 340 easier, and the anchor cable 340 can be fixed by only setting the fixing plate 352 and the adjusting plate 351 on the waist beam 330 and the pier 310, thereby saving construction time and cost. The design of the articulated adjusting plate 351 also makes subsequent maintenance and adjustment more convenient, and can easily fine-tune the tension of the anchor cable 340 to adapt to changes caused by foundation settlement or other factors.

[0052] In some embodiments, for example, Figure 1 , Figure 2As shown, the fixing assembly 100 includes an end 110 and an inclined column 120, the end 110 is fixedly arranged in the rock formation, and the inclined column 120 can be detachably arranged on the end 110. The fixing assembly 100 is inclined in a direction away from the support assembly 200, the distance between the end 110 and the support assembly 200 is L1, and the distance between the pier 310 and the support assembly 200 is L2, which satisfies: L1<L2. By tilting the fixing assembly 100, the load of the support structure can be better transferred to the rock formation, thereby improving the overall stability of the structure. In addition, since the fixing assembly 100 is tilted in a direction away from the support assembly 200, the distance L1 between the end 110 and the support assembly 200 is less than the distance L2 between the pier 310 and the support assembly 200, which helps to optimize the distribution of the load, reduce the stress concentration at the bottom of the support structure, and improve the bearing capacity of the support structure. Furthermore, the inclined fixing assembly 100 can reduce the displacement of the supporting structure under the lateral pressure and improve the lateral pressure resistance of the supporting structure. Finally, the inclined fixing assembly 100 can improve the seismic performance of the supporting structure in natural disasters such as earthquakes and reduce the risk of structural damage.

[0053] In some embodiments, for example, Figure 1 , Figure 2 As shown, a first through slot is provided in the end head 110, and a second through slot is provided in the inclined column 120, and the first through slot and the second through slot are not connected to each other. Specifically, in the process of fixing the fixing assembly 100 to the rock formation, after the drilling is completed, a certain amount of concrete is poured into the opened hole, so that the poured depth of the concrete is the same as the length of the end head 110 in the hole. Afterwards, the end head 110 is inserted into the hole. Since the first through slot is provided in the end head 110, the concrete poured into the hole can directly enter the first through slot, that is, the end head 110 can be directly embedded in the concrete.

[0054] A second through groove is opened in the inclined column 120. After the end head 110 is embedded in the concrete, the inclined column 120 is installed on the end head 110. After the installation is completed, concrete is continued to be poured into the second through groove to fill the second through groove. The hollow inclined column 120 is filled with concrete, which can enable the fixing component 100 to have reliable bending, shear and compression resistance.

[0055] In some embodiments, for example, Figure 1As shown, the fixing assembly 100 further includes a sleeve 130, and the end head 110 and the inclined column 120 can be detachably inserted into the sleeve 130. Before the end head 110 and the inclined column 120 are inserted into the opening, the sleeve 130 is first sleeved on the outside of the end head 110 and the inclined column 120, so that after the end head 110 and the inclined column 120 are fixed, the sleeve 130 is inserted into the soil 500, and the end head 110 and the inclined column 120 are completely out of contact with the soil 500. When the foundation pit is used, or other situations occur, when the present embodiment needs to be recycled and dismantled, the buttress 310 is broken, and the inclined column 120 is directly dismantled for recycling, and the recycling process is simple and convenient.

[0056] It is understandable that the connection method between the end 110, the inclined column 120 and the sleeve 130 can be set arbitrarily as long as it does not affect the subsequent dismantling operation.

[0057] In some embodiments, for example, Figure 4 , Figure 5 As shown, a limiting block 123 is provided at one end of the inclined column 120 close to the end head 110, and a plurality of limiting blocks 123 are evenly arranged along the circumference of the inclined column 120; a limiting hole 111 is correspondingly provided on the surface of the end head 110 facing the inclined column 120. When the inclined column 120 is inserted into the end head 110, the limiting block 123 needs to correspond to the limiting hole 111. After the limiting block 123 enters the end head 110, the inclined column 120 is rotated to make the inclined column 120 and the end head 110 relatively displaced, and the limiting block 123 is staggered with the limiting hole 111, so that the inclined column 120 cannot be separated from the end head 110.

[0058] In addition, a push plate 122 is provided on the inclined column 120, and a stop groove is provided on the side of the end head 110 facing the push plate 122, and a spring is provided in the stop groove. After the inclined column 120 is inserted into the end head 110 and the stop block 123 extends into the end head 110, the push plate 122 abuts against the spring and compresses the spring, and the spring gives the inclined column 120 a force away from the end head 110, and cooperates with the stop block 123 and the stop hole 111, so that the connection and fixation of the inclined column 120 and the end head 110 is simple and reliable.

[0059] When it is necessary to remove the inclined column 120 and the end head 110, since the end head 110 is fixedly set in the rock formation, it is only necessary to rotate the inclined column 120 so that the limit block 123 corresponds to the limit hole 111, and the inclined column 120 can be removed from the end head 110 under the action of the spring, and the removal process is simple and convenient.

[0060] In some embodiments, for example, Figure 4As shown, a handle 121 is provided on the end of the inclined column 120 away from the end 110. During the installation or removal of the inclined column 120, the construction personnel can directly rotate the inclined column 120 through the handle 121, making the installation or removal process of the inclined column 120 simple and easy to operate, further reducing the construction difficulty of this embodiment.

[0061] In some embodiments, for example, Figure 1 , Figure 2 As shown, a pier 310 connection seat is provided at one end of the inclined column 120 away from the end head 110, and the pier 310 is provided on the pier 310 connection seat. The pier 310 is connected and fixed by the pier 310 connection seat. On the one hand, the connection between the pier 310 and the inclined column 120 can be simple and convenient, and the connection strength is reliable. On the other hand, during the construction process, the inclined column 120 can be tilted in any direction and at any angle according to actual conditions. As a rectangular piece, the pier 310 needs to be placed flat to ensure the connection and fixing effect of the anchor cable 340. The pier 310 connection seat is provided on the inclined column 120, and a placement surface can be provided on the pier 310 connection seat to place the pier 310, so as to ensure that the placement posture of the pier 310 is stable and appropriate.

[0062] The connection method between the pier 310 connection seat and the inclined column 120 can be set arbitrarily as long as the connection can be ensured to be reliable. For example, when constructing the pier 310, it is necessary to first use a steel cage as a skeleton and cast on the skeleton to form the pier 310. In this embodiment, the steel cage and the pier 310 connection seat are directly welded to fix the steel cage and the pier 310 connection seat, and then the steel cage can be cast.

[0063] In some embodiments, for example, Figure 1 As shown, the anchor cable assembly 300 also includes a protective tube, which is arranged between the pier 310 and the crown beam 320 and the waist beam 330, and the anchor cable 340 is inserted into the protective tube. The protective tube is arranged outside the anchor cable 340 to protect the anchor cable 340 during the construction process to prevent the anchor cable 340 from contacting the soil 500. In addition, when the present embodiment is used and needs to be removed, the anchor cable 340 can be directly pulled out of the protective tube, which is simple and convenient.

[0064] It should be noted that in the related art, the anchor cable 340 is directly in contact with the soil 500, which is not only unreliable, but also occupies a large space and needs to consider the soil quality. It is also inconvenient to remove, and the anchor cable 340 is usually directly abandoned, which is easy to affect the subsequent construction of the land.

[0065] In this embodiment, the casing 130 outside the inclined column 120 and the protective pipe outside the anchor cable 340 can be set to any material according to actual needs. When dismantling, the inclined column 120 and the anchor cable 340 are not in contact with the soil 500 and can be directly and conveniently pulled out. When the land needs to be constructed, the remaining casing 130 and protective pipe are short in length and occupy little space. They can be directly broken or excavated, which will not affect the development of underground space, such as subways, basements, etc.

[0066] The present application also provides a novel pile-anchor support structure construction method, using the novel pile-anchor support structure in any one of the above embodiments, the construction method includes:

[0067] The support assembly 200 is arranged at the edge of the foundation pit to be excavated, and the cap beam 320 is arranged on an end of the support assembly 200 away from the rock formation.

[0068] A hole is drilled in the rock formation and the fixing assembly 100 is fixed in the hole. The pier 310 is set on the end of the fixing assembly 100 away from the rock formation. The soil 500 on the side of the pier 310 away from the supporting assembly 200 is cleared to reserve operating space.

[0069] The skeletons of the pier 310 and the crown beam 320 are connected by the anchor cable 340. After the connection is completed, a suitable number of connection holes are reserved on the skeleton of the pier 310, and the skeletons of the pier 310 and the crown beam 320 are cast to form the pier 310 and the crown beam 320.

[0070] It should be noted that the piers 310, the crown beam 320, and the waist beam 330 are all formed by casting, and before casting, a steel cage, that is, a frame, needs to be set up first. After the frame is set up, the frame can be cast.

[0071] During the construction of the pier 310, it is necessary to calculate in advance the number of waist beams 330 and anchor cables 340 required for excavating the foundation pit, and reserve a suitable number of connection holes on the skeleton of the pier 310 before pouring. When the anchor cable 340 is connected to the pier 310, it can be directly inserted into the connection hole. Since a protective tube is provided on the outside of the anchor cable 340, and the protective tube is provided in the connection hole, after the pier 310 and the crown beam 320 are connected by the anchor cable 340, any mechanical equipment that provides tension can be used to tension the anchor cable 340 at one end or both ends of the anchor cable 340 to apply prestress to the anchor cable 340.

[0072] Start digging the foundation pit. After digging to a suitable depth, set the waist beam 330 on the side of the support component 200 away from the fixing component 100, and connect the pier 310 and the frame of the waist beam 330 through the anchor cable 340. After the connection is completed, cast the frame of the waist beam 330 to form the waist beam 330.

[0073] Adaptively, after the casting of the waist beam 330 is completed, it is also necessary to tension the anchor cable 340 between the pier 310 and the waist beam 330 to apply prestress.

[0074] Continue to dig the foundation pit until a suitable depth is reached, and then set the next waist beam 330 on the side of the support assembly 200 away from the fixing assembly 100, and repeat the above operation until the foundation pit is excavated.

[0075] When the foundation pit operation is completed and the support assembly 200 and the fixing assembly 100 need to be removed, the waist beam 330 is removed from the bottom to the top, the anchor cable 340 is recovered, and the next waist beam 330 is removed until the waist beam 330 is completely removed, the crown beam 320 is removed, the anchor cable 340 is recovered, the pier 310 is broken, and the fixing assembly 100 is recovered.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new type of pile-anchor support structure for supporting foundation pits; characterized in that: include: A fixing assembly (100), the fixing assembly (100) being used to be fixedly arranged in a rock formation; A support assembly (200), wherein the support assembly (200) is vertically arranged at the edge of a foundation pit to be excavated; An anchor cable assembly (300), the anchor cable assembly (300) comprising a buttress (310), a crown beam (320), a waist beam (330) and an anchor cable (340); The buttress (310) is arranged on one end of the fixing assembly (100) away from the rock formation, the cap beam (320) is arranged on one end of the supporting assembly (200) away from the rock formation, and the buttress (310) and the cap beam (320) are arranged horizontally, and the anchor cable (340) is arranged between the buttress (310) and the cap beam (320); The waist beam (330) is arranged on a side of the support assembly (200) away from the fixing assembly (100), and the anchor cable (340) is arranged between the waist beam (330) and the buttress (310); The anchor cables (340) are all inserted into the waist beam (330) and extend from a side of the waist beam (330) away from the buttress (310); A connecting piece (350) is provided on the waist beam (330), and one end of the anchor cable (340) extending outside the waist beam (330) is arranged perpendicular to the connecting piece (350); The connecting member (350) comprises a fixing plate (352) and an adjusting plate (351), wherein the fixing plate (352) is arranged on the waist beam (330), and the adjusting plate (351) is hingedly arranged on the fixing plate (352), and the adjusting plate (351) can be relatively fixed to the fixing plate (352); The anchor cable (340) is sequentially inserted into the fixing plate (352) and the adjusting plate (351), and the anchor cable (340) and the adjusting plate (351) are vertically arranged; The fixing assembly (100) comprises an end head (110) and an inclined column (120), wherein the end head (110) is fixedly arranged in the rock formation, and the inclined column (120) is detachably arranged on the end head (110); The fixing assembly (100) is arranged obliquely in a direction away from the supporting assembly (200), the distance between the end head (110) and the supporting assembly (200) is L1, and the distance between the buttress (310) and the supporting assembly (200) is L2, satisfying: L1<L2; A first through slot is formed in the end head (110), a second through slot is formed in the inclined column (120), and the first through slot and the second through slot are not connected to each other; The fixing assembly (100) further comprises a sleeve (130), and the end head (110) and the inclined column (120) are both detachably plugged into the sleeve (130); A limiting block (123) is arranged at one end of the inclined column (120) close to the end head (110), and a plurality of limiting blocks (123) are evenly arranged along the circumference of the inclined column (120); a limiting hole (111) is correspondingly arranged on a surface of the end head (110) facing the inclined column (120); a push plate (122) is also arranged on the inclined column (120), and a stop groove is opened on a surface of the end head (110) facing the push plate (122), and a spring is arranged in the stop groove.

2. The novel pile-anchor support structure according to claim 1 is characterized in that: A plurality of waist beams (330) are arranged on the support assembly (200), and the plurality of waist beams (330) are extended in a direction away from the crown beam (320) along a vertical direction; An anchor cable (340) is provided between each waist beam (330) and the buttress (310).

3. The novel pile-anchor support structure according to claim 1 is characterized in that: A buttress (310) connection seat is provided on one end of the inclined column (120) away from the end head (110), and the buttress (310) is arranged on the buttress (310) connection seat.

4. The novel pile-anchor support structure according to claim 1 is characterized in that: The anchor cable assembly (300) further comprises a protection tube, wherein the protection tube is arranged between the buttress (310) and the crown beam (320) and the waist beam (330), and the anchor cable (340) is passed through the protection tube.

5. A new type of pile-anchor support structure construction method, characterized in that: Using the novel pile-anchor support structure according to any one of claims 1 to 4, the construction method comprises: The support assembly (200) is arranged at the edge of a foundation pit to be excavated, and the cap beam (320) is arranged on an end of the support assembly (200) away from the rock formation; Drilling a hole in a rock formation and fixing the fixing assembly (100) in the hole, the buttress (310) being arranged at an end of the fixing assembly (100) away from the rock formation, and clearing the soil (500) on a side of the buttress (310) away from the supporting assembly (200) to reserve operating space; The frame of the buttress (310) and the crown beam (320) are connected by the anchor cable (340). After the connection is completed, a suitable number of connection holes are reserved on the frame of the buttress (310), and the frame of the buttress (310) and the crown beam (320) are cast to form the buttress (310) and the crown beam (320); Starting to dig a foundation pit, after digging to a suitable depth, arranging the waist beam (330) on a side of the support assembly (200) away from the fixing assembly (100), and connecting the pier (310) and the frame of the waist beam (330) through the anchor cable (340), and after the connection is completed, pouring the frame of the waist beam (330) to form the waist beam (330); Continue to excavate the foundation pit until a suitable depth is reached, and then set the next waist beam (330) on a side of the support assembly (200) away from the fixing assembly (100), and repeat the above operation until the foundation pit is excavated; When the foundation pit operation is completed and the support assembly (200) and the fixing assembly (100) need to be removed, the waist beam (330) is removed from bottom to top, the anchor cable (340) is recovered, and the next waist beam (330) is removed until the waist beam (330) is completely removed, the crown beam (320) is removed, the anchor cable (340) is recovered, the pier (310) is broken, and the fixing assembly (100) is recovered.

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