A underground continuous wall supporting structure based on row pile supporting system and a construction method thereof
By setting up a pile support system with reinforced piles and anchor cables on the side of the foundation pit, the problem of insufficient support strength of the continuous wall was solved, achieving efficient foundation pit support and foundation reinforcement of old buildings, and reducing construction costs and space occupation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG YANKE CONSTR CO LTD
- Filing Date
- 2023-08-04
- Publication Date
- 2026-05-12
AI Technical Summary
When the span of the existing foundation pit support structure is long, the self-supporting strength of the continuous wall is insufficient. It is necessary to install a support frame, which takes up space and increases construction costs. It is also easy to affect the foundation of the old building, leading to settlement or cracking.
The underground continuous wall structure based on the pile support system is adopted, which includes reinforced piles, concrete continuous walls and reinforced anchor cables. The reinforced anchor cables are connected to the reinforced piles to form a reinforced structure, which replaces the traditional support, improves the lateral support force and avoids space occupation.
It improves the lateral support of the foundation pit, reduces construction costs, avoids settlement of the old building foundation, enhances the lateral support capacity of the old building foundation, and does not occupy the space inside the foundation pit.
Smart Images
Figure CN117005424B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of foundation pit support technology, specifically to an underground continuous wall support structure based on a pile support system and its construction method. Background Technology
[0002] With the development of the national economy and the acceleration of urbanization, a large number of foundation pit projects have emerged. Foundation pit support is a temporary measure for supporting, reinforcing, protecting, and controlling groundwater in order to protect the construction of the underground main structure and the safety of the surrounding environment. Existing foundation pit support often adopts a continuous wall type foundation pit support structure. A narrow and deep trench is dug underground, and appropriate materials are poured into it to form a continuous underground wall with seepage prevention, soil retention, and load-bearing functions. Precast components are inserted and connected into a complete wall by cast-in-place concrete. As a soil retention structure, it prevents the soil outside the foundation pit sidewall from moving into the foundation pit. As a water-stop curtain, it prevents water outside the foundation pit sidewall from flowing into the foundation pit. Moreover, the diaphragm wall can also serve as the exterior wall of a building and bear vertical forces.
[0003] When supporting a long-span foundation pit, the diaphragm wall alone is insufficient to provide stable support to the pit side. A support structure needs to be installed on one side of the diaphragm wall. The support structure is located inside the foundation pit, which occupies a certain amount of installation space. This not only affects the construction work inside the foundation pit, but also increases the construction cost and difficulty by requiring the reservation of installation space and fixed base for the support during the excavation of the foundation pit. Furthermore, due to the scarcity of urban land, the foundation pit is often surrounded by old buildings. When the foundation pit is close to the old buildings, the excavation of the diaphragm wall installation trench can easily affect the foundation structure of the old buildings, causing settlement of the old building foundation. In severe cases, it can even lead to cracking of the entire foundation of the old building, thereby causing cracking or tilting of the original building structure. Summary of the Invention
[0004] The purpose of this invention is to provide a diaphragm wall support structure based on a pile support system and its construction method, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a diaphragm wall support structure based on a pile support system, comprising a support mechanism for supporting the foundation pit, wherein the support mechanism comprises reinforced piles, a concrete diaphragm wall, and reinforced anchor cables;
[0006] The foundation pit is surrounded by foundation soil. The reinforcing piles, concrete continuous wall and reinforcing anchors are all located inside the foundation soil. The concrete continuous wall is located on one side of the concrete continuous wall and the reinforcing piles are located on one side of the foundation soil. An anchor connection plate is provided on the front side of the concrete continuous wall and the reinforcing anchors are connected between the concrete continuous wall and the reinforcing piles through the anchor connection plate.
[0007] Preferably, there are no buildings on the sides of the foundation pit, the concrete continuous wall is fixedly installed on one side inside the foundation pit, and the reinforcing piles are installed on the outside of the concrete continuous wall.
[0008] Preferably, the above-mentioned reinforcing piles are arranged in several groups, and the several reinforcing piles are distributed at fixed intervals with the concrete continuous wall, and the several reinforcing piles are distributed at fixed intervals with each other.
[0009] Preferably, the aforementioned reinforcing anchor cables are longitudinally arranged at specific intervals on one side of the reinforcing piles, with one end of the reinforcing anchor cable being fixedly connected to the reinforcing piles and the other end of the reinforcing anchor cable being fixedly connected to the concrete continuous wall through an anchor cable connecting plate.
[0010] Preferably, the front edge of the anchor cable connecting plate is provided with fixing screw holes, and fixing bolts are provided inside the fixing screw holes. The fixing bolts pass through the fixing screw holes, are threaded into the anchor cable connecting plate, and are threaded into the screw holes opened on the side of the pit. The anchor cable connecting plate is fixedly connected to the inside of the pit by the fixing bolts.
[0011] Preferably, the anchor cable connecting plate is provided with a connecting plate groove in the middle, and an anchor cable connecting plate is provided on the inner side of the connecting plate groove, and the anchor cable connecting plate is movably fitted into the inner side of the connecting plate groove.
[0012] Preferably, the inner side of the connecting plate groove is provided with anchor cable connection holes evenly distributed, the number of anchor cable connecting plates corresponds to the number of anchor cable connection holes, the middle part of the anchor cable connecting plate is provided with a fastening screw hole, the end of the reinforcing anchor cable is fixed with a fastening stud, the fastening stud is movably inserted through the anchor cable connecting plate and the anchor cable connecting plate, the upper part of the fastening stud is threaded with a fastening nut, and the reinforcing anchor cable is fixedly connected to the anchor cable connecting plate through the fastening nut.
[0013] Preferably, an old-style building is provided on the side of the foundation pit, the concrete continuous wall is fixedly supported on the inside side of the foundation pit, the reinforcing piles are provided on the outside of the concrete continuous wall, and the reinforcing piles are provided between the old-style building and the concrete continuous wall.
[0014] Preferably, the aforementioned reinforcing piles are fixed inside the foundation soil, and a plurality of reinforcing piles are provided, which are staggered and fixed between the old building and the concrete continuous wall.
[0015] This invention also provides a construction method for a diaphragm wall support structure based on a pile support system, comprising the following steps:
[0016] S1. Pile positioning: The number of reinforcement piles and the distance between them and the continuous concrete wall are determined according to the scale of the foundation pit. When used for foundation reinforcement of old buildings, the position of the reinforcement piles should be determined according to the height of the old building and the foundation structure to ensure the reinforcement strength of the reinforcement piles.
[0017] S2. Pile Concreting: When constructing reinforced piles, the pile holes are excavated in the upper part of the foundation soil according to the positioning information. The depth of the pile holes should be greater than the depth of the foundation pit. Then, the steel cage is placed inside the pile holes using hoisting equipment. When hoisting and placing the steel cage, it is necessary to ensure that it is consistent with the design direction of the steel cage. After completion, the concrete is poured to complete the reinforced pile construction.
[0018] S3. Continuous wall construction: When constructing a concrete continuous wall, first excavate the installation trench based on the upper part of the foundation soil positioned on the side of the foundation pit. After the concrete of the upper reinforcement layer of the installation trench is poured, wait for the concrete to solidify and then excavate the lower foundation trench. The depth of the foundation trench should be slightly greater than the depth of the foundation pit. After completion, place the steel cage inside the foundation trench using hoisting equipment, and then carry out the concrete continuous wall pouring construction to complete the concrete continuous wall pouring construction.
[0019] S4. Excavation of the foundation pit: After the concrete continuous wall has solidified, the foundation pit is excavated layer by layer according to the edge line of the foundation pit to be excavated in the building section, and the excavation construction of the foundation pit is completed.
[0020] S5. Anchor cable reinforcement: After the foundation pit excavation is completed, the exterior of the concrete continuous wall is cleaned. Then, lateral holes are drilled in the upper part of the concrete continuous wall, with the hole positions corresponding to the distribution positions of the reinforcement piles. The end of the reinforcement anchor cable is then connected to the reinforcement pile through these holes, using the reinforcement pile as the fixed anchor point for the reinforcement anchor cable. Afterward, the anchor cable connecting plate is installed and fixed according to the position of the reinforcement anchor cable. The reinforcement anchor cable and the anchor cable connecting plate are fixedly connected by the fastening studs at the end of the reinforcement anchor cable and the anchor cable connecting plate on the upper part of the anchor cable connecting plate, thus completing the connection and fixation of the reinforcement anchor cable. When used for foundation reinforcement of old buildings, it is not necessary to install reinforcement anchor cables; the foundation pit support can be completed solely by the reinforcement piles and the concrete continuous wall.
[0021] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects:
[0022] This support structure adopts a diaphragm wall support structure based on a pile support system. Reinforcing piles are set on one side of the concrete diaphragm wall. When supporting and reinforcing the foundation pit side, the reinforcing piles and reinforcing anchor cables form a reinforcement structure, replacing the traditional bracket reinforcement structure. The concrete diaphragm wall is reinforced by the reinforcing anchor cables connected to the reinforcing piles. The reinforcing anchor cables are connected between the reinforcing piles and the concrete diaphragm wall. While improving the lateral support force of the concrete diaphragm wall, it does not occupy the internal space of the foundation pit, which facilitates the construction work in the foundation pit. Moreover, compared with the traditional bracket support combination, this support structure also has a lower construction cost.
[0023] Furthermore, by reinforcing the foundation pit on the side of the old building, the foundation on the side of the old building can be supported and reinforced by the reinforcing piles, which can improve the lateral support capacity of the foundation of the old building. When excavating the installation trench of the concrete continuous wall, the foundation soil on the side of the installation trench can be prevented from loosening, which can effectively prevent the foundation of the old building from shifting and settling. Compared with the traditional single continuous wall support structure, it has better functional support characteristics. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the support structure on the side of the foundation pit according to the present invention;
[0026] Figure 2 This is a schematic diagram of the left side structure of the anchor cable connection plate of the present invention;
[0027] Figure 3 This is a schematic diagram of the right side structure of the anchor cable connection plate of the present invention;
[0028] Figure 4 This is a schematic diagram of the connection structure of the anchor cable connecting plate and its connectors according to the present invention;
[0029] Figure 5 This is a schematic diagram of the side support structure of an old-style building according to the present invention;
[0030] Figure 6 This is a schematic diagram of the reinforced pile distribution structure of the present invention.
[0031] Explanation of reference numerals in the attached drawings: 1. Foundation soil; 2. Foundation pit; 3. Reinforced piles; 4. Concrete continuous wall; 5. Reinforced anchor cable; 6. Anchor cable connecting plate; 7. Old building; 8. Fixing bolt hole; 9. Fixing bolt; 10. Connecting plate groove; 11. Anchor cable connecting plate; 12. Anchor cable connecting hole; 13. Fastening bolt hole. Detailed Implementation
[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0033] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.
[0034] Example 1
[0035] Please see Figure 1-4 The present invention provides a technical solution: an underground continuous wall support structure based on a pile support system, including a support mechanism for supporting the foundation pit 2. The support mechanism includes reinforced piles 3, a concrete continuous wall 4, and reinforced anchor cables 5. The reinforced piles 3 and the reinforced anchor cables 5 form an anchor bolt-type reinforcement structure, replacing the traditional bracket reinforcement structure. The concrete continuous wall 4 is reinforced by tension through the reinforced anchor cables 5 connected to the reinforced piles 3.
[0036] The foundation pit 2 is surrounded by foundation soil 1. There are no buildings on the sides of the foundation pit 2. The reinforcing piles 3, the concrete continuous wall 4 and the reinforcing anchor cables 5 are all set inside the foundation soil 1. The concrete continuous wall 4 is fixedly set inside one side of the foundation pit 2. The concrete continuous wall 4 is a concrete support wall, which is poured into one side of the foundation pit 2. An anchor cable connecting plate 6 is set on the front side of the concrete continuous wall 4.
[0037] The anchor cable connecting plate 6 is a steel metal plate base. The front edge of the anchor cable connecting plate 6 is evenly provided with fixing screw holes 8. Fixing bolts 9 are installed inside the fixing screw holes 8. The fixing bolts 9 pass through the fixing screw holes 8, pass through the anchor cable connecting plate 6, and are threaded to the inside of the screw holes opened on the side of the pit 2. The anchor cable connecting plate 6 is fixedly connected to the inside of the pit 2 by the fixing bolts 9. The fixing bolts 9 are made of alloy material and the length of the fixing bolts 9 is between 10-20cm.
[0038] An anchor cable connecting plate 6 has a connecting plate groove 10 in the middle, and an anchor cable connecting plate 11 is provided on the inner side of the connecting plate groove 10. The anchor cable connecting plate 11 is a steel square plate base. The anchor cable connecting plate 11 is movably fitted into the inner side of the connecting plate groove 10, which can be fitted and snapped into the end of the reinforcing anchor cable 5, and can be connected and fixed to the end of the reinforcing anchor cable 5.
[0039] Anchor cable connection holes 12 are evenly provided on the inner side of the connecting plate groove 10. The number of anchor cable connecting plates 11 corresponds to the number of anchor cable connection holes 12. A fastening screw hole 13 is provided in the middle of the anchor cable connecting plate 11. A fastening stud is fixed to the end of the reinforcing anchor cable 5. The fastening stud moves through the anchor cable connecting plate 6 and the anchor cable connecting plate 11. After the reinforcing anchor cable 5 is connected, it is tightened and fixed. A fastening nut is threaded on the upper part of the fastening stud. Tightening the fastening nut can be used to feed the thread. The reinforcing anchor cable 5 is tightened and fixed. The reinforcing anchor cable 5 is fixedly connected to the anchor cable connecting plate 6 by tightening nuts. The reinforcing pile 3 and the reinforcing anchor cable 5 form a reinforcing structure, replacing the traditional support reinforcement structure. The concrete continuous wall 4 is reinforced by the reinforcing anchor cable 5 connected to the reinforcing pile 3. The reinforcing anchor cable 5 is connected between the reinforcing pile 3 and the concrete continuous wall 4. While improving the lateral support force of the concrete continuous wall 4, it does not occupy the internal space of the foundation pit 2.
[0040] The reinforcing piles 3 are set on the outside of the concrete continuous wall 4. There are several reinforcing piles 3. The several reinforcing piles 3 are distributed at fixed intervals with the concrete continuous wall 4. The several reinforcing piles 3 are distributed at fixed intervals and are coaxially distributed to support and reinforce the foundation soil 1 and provide anchoring points for the concrete continuous wall 4.
[0041] The reinforcing anchor cable 5 is connected between the concrete continuous wall 4 and the reinforcing anchor cable 5 through the anchor cable connecting plate 6. The reinforcing anchor cable 5 is a steel anchor cable. The reinforcing anchor cable 5 is set longitudinally on one side of the reinforcing pile 3 at a specific interval. One end of the reinforcing anchor cable 5 is fixedly connected to the reinforcing pile 3, and the other end of the reinforcing anchor cable 5 is fixedly connected to the concrete continuous wall 4 through the anchor cable connecting plate 6. The reinforcing pile 3 and the reinforcing anchor cable 5 form an anchor bolt-type reinforcement structure, which replaces the traditional support reinforcement structure. The concrete continuous wall 4 is reinforced by tension through the reinforcing anchor cable 5 connected to the reinforcing pile 3.
[0042] The working principle or structural principle is to first locate the piles, and then determine the number of reinforcing piles 3 and the distance between them and the concrete continuous wall 4 based on the scale of the foundation pit 2.
[0043] Afterwards, the piles are poured. When constructing the reinforced piles 3, the pile holes are excavated in the upper part of the foundation soil 1 according to the positioning information. The depth of the pile holes should be greater than the depth of the foundation pit 2. Then, the steel cage is placed inside the pile holes by hoisting equipment. When hoisting and placing the steel cage, it is necessary to ensure that it is consistent with the design direction of the steel cage. After completion, the concrete is poured to complete the construction of the reinforced piles 3.
[0044] Subsequently, the construction of the continuous wall is carried out. When constructing the concrete continuous wall 4, the installation trench is first excavated on the upper part of the foundation soil 1 located on the side of the foundation pit 2. After the concrete of the upper reinforcement layer of the installation trench is poured, the lower foundation trench is excavated after the concrete has solidified. The depth of the foundation trench should be slightly greater than the depth of the foundation pit 2. After completion, the steel cage is placed inside the foundation trench using hoisting equipment. Then, the concrete continuous wall 4 is poured to complete the pouring construction of the concrete continuous wall 4.
[0045] After completion, the excavation of foundation pit 2 will be carried out. After the concrete continuous wall 4 has solidified, foundation pit 2 will be excavated layer by layer according to the edge line of foundation pit 2 to be excavated in the building part, and the excavation construction of foundation pit 2 will be completed.
[0046] Finally, the anchor cables are reinforced. After the excavation of the foundation pit is completed, the exterior of the concrete continuous wall 4 is cleaned. Then, lateral holes are drilled on the upper part of the concrete continuous wall 4, and the drilling positions correspond to the distribution positions of the reinforcing piles 3. The end of the reinforcing anchor cable 5 is then connected to the reinforcing pile 3 through the drilling, and the reinforcing pile 3 is used as the fixed anchor point of the reinforcing anchor cable 5. Then, the anchor cable connecting plate 6 is installed and fixed according to the position of the reinforcing anchor cable 5. The reinforcing anchor cable 5 and the anchor cable connecting plate 11 on the upper part of the anchor cable connecting plate 6 are used to fix the reinforcing anchor cable 5 and the anchor cable connecting plate 6, thus completing the connection and fixation of the reinforcing anchor cable 5.
[0047] Example 2
[0048] Please see Figure 5-6 A type of underground continuous wall support structure based on a pile support system, which differs from the first embodiment in that: an old-style building 7 is set on the side of the foundation pit 2, and a concrete continuous wall 4 is fixedly supported on one side of the interior of the foundation pit 2. The concrete continuous wall 4 is a continuous wall support structure of reinforced concrete, which can support and reinforce the side of the foundation pit 2.
[0049] The reinforcing piles 3 are set on the outside of the concrete continuous wall 4 and between the old building 7 and the concrete continuous wall 4. The position of the reinforcing piles 3 should be determined according to the height of the old building 7 and the foundation structure to ensure the reinforcement strength of the reinforcing piles 3. The reinforcing piles 3 are used to support and reinforce the foundation of the old building 7, which can effectively prevent the foundation of the old building 7 from shifting and settling.
[0050] The reinforcing piles 3 are fixed inside the foundation soil 1. The reinforcing piles 3 are reinforced concrete piles formed by casting. Several reinforcing piles 3 are set up. Several reinforcing piles 3 are fixed in an interlaced manner between the old building 7 and the concrete continuous wall 4. The interlaced distribution can improve the lateral support capacity of the reinforcing piles 3.
[0051] The working principle or structural principle is the same as that in Example 1. The construction of the reinforcing pile 3 and the concrete continuous wall 4 is completed in the same way. When the reinforcing pile 3 is used for the foundation reinforcement of the old building 7, the position of the reinforcing pile 3 should be determined according to the height of the old building 7 and the foundation structure to ensure the reinforcement strength of the reinforcing pile 3. The reinforcing pile 3 is distributed in an alternating manner. Finally, after the foundation pit 2 is excavated, it is not necessary to connect and install the reinforcing anchor cable 5. The foundation pit 2 can be supported by the reinforcing pile 3 and the concrete continuous wall 4 alone.
[0052] In summary, this support structure adopts a diaphragm wall support structure based on a pile support system. Reinforcing piles 3 are installed on one side of the concrete diaphragm wall 4. When supporting and reinforcing the side of the foundation pit 2, the reinforcing piles 3 and reinforcing anchor cables 5 form a reinforcement structure, replacing the traditional bracket reinforcement structure. The concrete diaphragm wall 4 is reinforced by the reinforcing anchor cables 5 connected to the reinforcing piles 3. The reinforcing anchor cables 5 connect the reinforcing piles 3 and the concrete diaphragm wall 4, improving the lateral support force of the concrete diaphragm wall 4 without occupying the internal space of the foundation pit 2, thus facilitating construction operations within the foundation pit 2. Furthermore, compared to traditional bracket support, this support structure also has lower construction costs.
[0053] Furthermore, by reinforcing the pile 3, when supporting and reinforcing the foundation pit 2 on the side of the old building 7, the foundation on the side of the old building 7 can be supported and reinforced by the pile 3, which can improve the lateral support capacity of the foundation of the old building 7. When excavating the installation trench of the concrete continuous wall 4, the foundation soil 1 on the side of the installation trench can be prevented from loosening, which can effectively prevent the foundation of the old building 7 from shifting and settling. Compared with the traditional single continuous wall support structure, it has better functional support characteristics.
[0054] This invention also provides a construction method for a diaphragm wall support structure based on a pile support system, comprising the following steps:
[0055] S1. Pile positioning: The number of reinforcing piles 3 and the distance between them and the concrete continuous wall 4 are determined according to the scale of the foundation pit 2. When used for foundation reinforcement of old building 7, the position of reinforcing piles 3 should be determined according to the height of old building 7 and foundation structure to ensure the reinforcement strength of reinforcing piles 3.
[0056] S2. Pile Concreting: When constructing reinforced pile 3, the pile holes are excavated in the upper part of the foundation soil 1 according to the positioning information. The depth of the pile holes should be greater than the depth of the foundation pit 2. Then, the steel cage is placed inside the pile hole using hoisting equipment. When hoisting and placing the steel cage, it is necessary to ensure that it is consistent with the design direction of the steel cage. After completion, the concrete is poured to complete the construction of reinforced pile 3.
[0057] S3. Continuous wall construction: When constructing the concrete continuous wall 4, first excavate the installation trench on the upper part of the foundation soil 1 located on the side of the foundation pit 2. After the concrete of the upper reinforcement layer of the installation trench is poured, wait for the concrete to solidify and then excavate the lower foundation trench. The depth of the foundation trench should be slightly greater than the depth of the foundation pit 2. After completion, place the steel cage inside the foundation trench using hoisting equipment, and then carry out the pouring construction of the concrete continuous wall 4 to complete the pouring construction of the concrete continuous wall 4.
[0058] S4. Excavation of the foundation pit: After the concrete continuous wall 4 has solidified, the foundation pit 2 will be excavated layer by layer according to the edge line of the foundation pit 2 to be excavated in the building section, and the excavation construction of the foundation pit 2 will be completed.
[0059] S5. Anchor cable reinforcement: After the foundation pit excavation is completed, the exterior of the concrete continuous wall 4 is cleaned. Then, lateral holes are drilled on the upper part of the concrete continuous wall 4, with the hole positions corresponding to the distribution positions of the reinforcement piles 3. The end of the reinforcement anchor cable 5 is then connected to the reinforcement pile 3 through the holes, and the reinforcement pile 3 is used as the fixed anchor point of the reinforcement anchor cable 5. Then, the anchor cable connecting plate 6 is installed and fixed according to the position of the reinforcement anchor cable 5. The reinforcement anchor cable 5 and the anchor cable connecting plate 11 on the upper part of the anchor cable connecting plate 6 are used to fix the reinforcement anchor cable 5 and the anchor cable connecting plate 6, thus completing the connection and fixation of the reinforcement anchor cable 5. When used for foundation reinforcement of old buildings 7, it is not necessary to install the reinforcement anchor cable 5. The foundation pit 2 can be supported by the reinforcement piles 3 and the concrete continuous wall 4 alone.
[0060] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. It should be noted that implementations not illustrated or described in the drawings or the main text of the specification are forms known to those skilled in the art and are not described in detail. Furthermore, the definitions of the components described above are not limited to the various specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.
[0061] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A construction method for a diaphragm wall support structure based on a pile support system, wherein the diaphragm wall support structure based on the pile support system includes a support mechanism for supporting the foundation pit (2), wherein the support mechanism includes reinforced piles (3), a concrete diaphragm wall (4) and reinforced anchor cables (5). The foundation pit (2) is surrounded by foundation soil (1). The reinforcing piles (3), the concrete continuous wall (4) and the reinforcing anchors (5) are all located inside the foundation soil (1). The concrete continuous wall (4) is located on one side of the foundation pit (2). The reinforcing piles (3) are located on one side of the concrete continuous wall (4). An anchor connection plate (6) is provided on the front side of the concrete continuous wall (4). The reinforcing anchors (5) are connected between the concrete continuous wall (4) and the reinforcing piles (3) through the anchor connection plate (6). The anchor cable connecting plate (6) has a connecting plate groove (10) in the middle, and an anchor cable connecting plate (11) is provided on the inner side of the connecting plate groove (10). The anchor cable connecting plate (11) is movably fitted into the inner side of the connecting plate groove (10). Anchor cable connecting holes (12) are evenly opened on the inner side of the connecting plate groove (10). The number of anchor cable connecting plates (11) corresponds to the number of anchor cable connecting holes (12). A fastening screw hole (13) is opened in the middle of the anchor cable connecting plate (11). A fastening stud is fixed at the end of the reinforcing anchor cable (5). The fastening stud movably passes through the anchor cable connecting plate (6) and the anchor cable connecting plate (11). A fastening nut is threaded on the upper part of the fastening stud. The reinforcing anchor cable (5) is fixedly connected to the anchor cable connecting plate (6) through the fastening nut. Includes the following steps: S1. Loop positioning: The number of reinforcing piles (3) and the distance between the inter-concrete continuous wall (4) are determined according to the scale of the foundation pit (2). When used for foundation reinforcement of old buildings (7), the position of reinforcing piles (3) should be determined according to the height of the old buildings (7) and the foundation structure to ensure the reinforcement strength of reinforcing piles (3). S2, pile casting: When constructing the reinforced piles (3), the pile holes are excavated in the upper part of the foundation soil (1) according to the positioning information. The depth of the pile holes should be greater than the depth of the foundation pit (2). Then, the steel cage is placed inside the pile hole by hoisting equipment. When hoisting and placing the steel cage, it is necessary to ensure that the installation direction of the steel cage is consistent with the design. After completion, the concrete is poured to complete the construction of the reinforced piles (3). S3. Continuous wall construction: When constructing the concrete continuous wall (4), first excavate the installation trench on the upper part of the foundation soil (1) positioned on the side of the foundation pit (2). After the concrete of the upper reinforcement layer of the installation trench is poured, the lower foundation trench is excavated after the concrete has solidified. The depth of the foundation trench should be greater than the depth of the foundation pit (2). After completion, the steel cage is placed inside the foundation trench by hoisting equipment. Then the concrete continuous wall (4) is poured to complete the concrete continuous wall (4) pouring construction. S4. Excavation of the foundation pit: After the concrete continuous wall (4) has solidified, the foundation pit (2) is excavated layer by layer according to the edge line of the foundation pit (2) to be excavated in the building section, and the excavation construction of the foundation pit (2) is completed. S5. Anchor cable reinforcement: After the excavation of the foundation pit is completed, the exterior of the concrete continuous wall (4) is cleaned. Then, a lateral hole is drilled on the upper part of the concrete continuous wall (4). The location of the hole corresponds to the distribution of the reinforcement piles (3). Then, the end of the reinforcement anchor cable (5) is connected to the reinforcement piles (3) through the hole. The reinforcement piles (3) are used as the fixed anchor points of the reinforcement anchor cable (5). Then, the anchor cable connecting plate (6) is installed and fixed according to the location of the reinforcement anchor cable (5). The reinforcement anchor cable (5) is fixedly connected to the anchor cable connecting plate (6) on the upper part of the anchor cable connecting plate (6) by the fastening stud at the end of the reinforcement anchor cable (5). The connection and fixation of the reinforcement anchor cable (5) is completed. When used for the foundation reinforcement of old buildings (7), it is not necessary to connect and install the reinforcement anchor cable (5). The foundation pit (2) can be supported by the reinforcement piles (3) and the concrete continuous wall (4).
2. The construction method for a diaphragm wall support structure based on a pile support system according to claim 1, characterized in that: There are no buildings on the side of the foundation pit (2), the concrete continuous wall (4) is fixedly set on the inside side of the foundation pit (2), and the reinforcing piles (3) are set on the outside of the concrete continuous wall (4).
3. The construction method for a diaphragm wall support structure based on a pile support system according to claim 1, characterized in that: The reinforcing piles (3) are provided in a number of units, and the reinforcing piles (3) and the concrete continuous wall (4) are distributed at a fixed interval.
4. The construction method for a diaphragm wall support structure based on a pile support system according to claim 1, characterized in that: The reinforcing anchor cable (5) is longitudinally arranged at a specific interval on one side of the reinforcing pile (3). One end of the reinforcing anchor cable (5) is fixedly connected to the reinforcing pile (3), and the other end of the reinforcing anchor cable (5) is fixedly connected to the concrete continuous wall (4) through the anchor cable connecting plate (6).
5. A construction method for a diaphragm wall support structure based on a pile support system according to claim 1, characterized in that: The anchor cable connecting plate (6) has evenly spaced fixing screw holes (8) on its front edge side. Fixing bolts (9) are installed inside the fixing screw holes (8). The fixing bolts (9) pass through the fixing screw holes (8) and are threaded to the inside of the screw holes on the side of the pit (2). The anchor cable connecting plate (6) is fixedly connected to the inside of the pit (2) by the fixing bolts (9).
6. The construction method for a diaphragm wall support structure based on a pile support system according to claim 1, characterized in that: An old-style building (7) is provided on the side of the foundation pit (2). The concrete continuous wall (4) is fixedly supported on the inside side of the foundation pit (2). The reinforcing piles (3) are provided on the outside of the concrete continuous wall (4). The reinforcing piles (3) are provided between the old-style building (7) and the concrete continuous wall (4).
7. A construction method for a diaphragm wall support structure based on a pile support system according to claim 1, characterized in that: The reinforcing piles (3) are fixed inside the foundation soil (1). Several reinforcing piles (3) are provided, and several reinforcing piles (3) are fixed in an alternating manner between the old building (7) and the concrete continuous wall (4).