Oblique composite pile supporting system and construction method thereof
By designing an oblique composite pile support system including positioning devices and removable oblique support, the problems of difficulty in controlling the inclination angle accuracy and low construction efficiency in traditional construction are solved, and efficient, low-cost and accurate foundation pit support construction are achieved.
Patent Information
- Application Number
- CN202510175440.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-04-18
AI Technical Summary
In construction, traditional oblique composite pile support has difficulty in controlling the accuracy of inclination angle of the soil, which affects the stability of foundation pit excavation. In the construction of deep and large foundation pits, the layout spacing of inclined pile composite pile support is dense, reducing construction efficiency and increasing construction costs.
An oblique composite pile support system including foundation pit enclosure piles, positioning devices, oblique composite pile support and top pressing mechanism is designed. The positioning device accurately controls the angle of the steel core into the soil to ensure construction quality; the inclined support is installed on the steel core to increase the spacing between the inclined piles and improve construction efficiency; the positioning device and inclined support are detachable devices, which are flexible to use and highly applicable.
The oblique composite pile support system with high construction efficiency, low cost and reliable construction accuracy is realized, which improves the stability of foundation pit excavation and reduces construction costs.
Smart Images
Figure CN119843672A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of construction foundation pit engineering support, and specifically to an inclined composite pile support system and a construction method thereof. Background Art
[0002] For foundation pits with complex surrounding environments, small excavation depths, large excavation areas, and irregular shapes, the traditional support system design usually adopts the form of retaining piles combined with horizontal internal supports. However, horizontal internal supports are usually cast-in-place reinforced concrete structures, and their construction, maintenance, and demolition periods are relatively long; their layout will inevitably limit the working surface and affect earth excavation. In order to make up for the above two deficiencies, this type of foundation pit can also adopt the form of retaining piles combined with inclined support. However, the support method of inclined support requires retaining soil under the inclined support, and support is carried out after the construction of the base in the central area is completed. Not only does the retained soil need to be excavated twice, which is inconvenient for excavation and transportation, but there will also be construction joints in the construction of the base below.
[0003] Traditional inclined composite pile supports can solve the shortcomings of horizontal internal support construction, maintenance and removal. However, it is difficult to control the accuracy of the inclination angle of the pile when driving into the soil during construction, which affects the stability of subsequent excavation of the foundation pit to a certain extent. On the other hand, in the construction of deep and large foundation pits, the inclined composite pile supports are arranged at a dense spacing and in large numbers, which reduces construction efficiency and increases construction costs.
[0004] In view of this, it is necessary to propose a new technical solution to overcome the shortcomings of the prior art. Summary of the invention
[0005] In response to the above technical problems, the present application provides an inclined composite pile support system and a construction method thereof with high construction efficiency, low cost and reliable construction accuracy.
[0006] In order to solve the above technical problems, the present application provides an inclined composite pile support system, including a foundation pit retaining pile, a positioning device, an inclined composite pile support and a capping mechanism; the foundation pit retaining pile is arranged along the vertical direction, the positioning device includes a base, a positioning pile arranged at the bottom of the base and an adjusting mechanism arranged at the top of the base, the capping mechanism includes a capping beam and a capping plate integrally formed with the capping beam and protruding from the capping beam, the inclined composite pile support includes a cement column buried in the foundation pit soil and a steel core material cast as one with the cement column, the steel core material partially passes through the adjusting mechanism and is fixedly connected to the capping mechanism and forms an acute angle with the foundation pit retaining pile, the capping mechanism is arranged at the top of the foundation pit retaining pile, and the steel core material is provided with an inclined support that can be detachably assembled with the capping mechanism.
[0007] Furthermore, the top end of the steel core material is assembled with the top plate through end plate bolts, and the oblique supports are detachably assembled on both sides of the steel core material and are respectively assembled and fixed with the top plate through end plate bolts.
[0008] Furthermore, the adjustment mechanism includes a locator, a hinge device connecting the locator and the base, and an adjustment rod that can adjust the angle between the locator and the base. The adjustment rod includes a first adjustment rod arranged on the base and a second adjustment rod arranged on the locator. The first adjustment rod and the second adjustment rod are provided with adaptive assembly holes and are assembled and fixed by means of a fixing rod. The first adjustment rod and the second adjustment rod are equal arcs.
[0009] Furthermore, the positioner and the base are both U-shaped steel plates, a first accommodating cavity is provided at the center of the base, a second accommodating cavity is provided at the center of the positioner, the projection of the second accommodating cavity is located within the projection area of the first accommodating cavity, and the steel core material passes through the first accommodating cavity and the second accommodating cavity and is assembled and fixed with the top pressing mechanism.
[0010] Furthermore, the steel core material is H-shaped steel and has a first end plate welded at one end with a reserved bolt opening, and the first end plate is assembled with the top plate; bolt openings are reserved at the connection between the web of the steel core material and the oblique support.
[0011] Furthermore, the oblique support is an H-shaped steel and has a second end plate and a third end plate welded at both ends with reserved bolt openings, and the second end plate is assembled and fixed to the top plate; the two oblique support H-shaped steels form a group of S-shaped supports.
[0012] The present application also provides a construction method of the oblique composite pile support system as described above, comprising the following steps: Step 10: Construction of foundation pit retaining piles; Step 20: Partially excavate the foundation pit to the elevation of the positioning device placement position, and mark the pile position of the oblique composite pile support; Step 30: Drive four positioning piles into the soil according to the position of the positioning device and keep some piles outside the soil, assemble the base and the positioning piles, and adjust the inclination angle of the positioner according to the pile position; Step 40: construct cement soil piles, then lift the steel core material and put it into the second accommodation cavity and the first accommodation cavity in the center of the positioner, and drive the steel core material part into the cement soil pile, wait for the oblique composite pile to be supported and cured to the design strength, and then enter step 50; Step 50: excavate the foundation pit to the bottom elevation of the top pressing mechanism, support the formwork and tie the steel bars of the top pressing beam and the top pressing plate on the top of the foundation pit retaining piles, tie the end plate bolts of the steel core material and the steel bars of the top pressing plate, and finally cast the top pressing beam and the top pressing plate as a whole; after the strength of the top pressing beam and the top pressing plate reaches the design strength, enter step 60; Step 60: excavate the foundation pit to the bottom elevation of the inclined support, first hoist one side of the inclined support to the corresponding installation position of the steel core material, then install the web bolts and the inclined support end plate bolts, and at the same time tie the inclined support end plate bolts and the steel bars of the top plate; then install the other side of the inclined support in the same way, and finally cast the inclined support top plate. After the strength of the top plate reaches the design strength, enter step 70; Step 70: After excavating the earth to the bottom elevation of the foundation pit, cast the foundation pit bottom plate. After the bottom plate is replaced, cut the end plate bolts of the oblique composite pile support and the top plate, and recycle the oblique composite pile support.
[0013] Furthermore, after the steel core material is partially driven into the cement soil pile in step 40, a recovery positioning device is also included.
[0014] Furthermore, the end plate bolts described in step 50 are long-rod bolts, so that the end plate bolts can be inserted into the top plate and tied to the steel bars, and holes are opened in the template of the top plate according to the positions where the end plate bolts are inserted, and then the end plate bolts are inserted.
[0015] Furthermore, when only the diagonal support needs to be recovered in step 70, the end plate bolts of the diagonal support can be cut and the web bolts can be removed before recovery.
[0016] Compared with the prior art, the present application has the following beneficial effects: the present application accurately controls the angle at which the steel core material is driven into the soil by setting a positioning device, thereby ensuring the construction quality of the oblique composite pile support; setting oblique supports on the steel core material can increase the spacing between oblique piles, improve construction efficiency, and reduce construction costs; the positioning device and the oblique supports are detachable devices, which are flexible to disassemble, can be recycled, and have strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of a three-dimensional assembly of a positioning device according to an embodiment of the present application; Figure 2 This is a schematic diagram of a three-dimensional assembly of a positioning device according to an embodiment of the present application from another angle; Figure 3 This is a schematic diagram of a partial assembly of a positioning device according to an embodiment of the present application; Figure 4 This is a schematic diagram of a three-dimensional assembly of an oblique support, a steel core material, and a top pressing mechanism according to an embodiment of the present application; Figure 5 This is a structural schematic diagram of an oblique composite pile support system under construction according to an embodiment of the present application; Figure 6 This is a schematic diagram of the structure after the construction of the inclined composite pile support system in one embodiment of the present application. Attached photos
[0018] Foundation pit retaining pile 1, positioning device 2, positioner 20, The second accommodating cavity 200, the base 21, the first accommodating cavity 210, Assembling hole 211, hinge device 22, upper hinge 220, Lower hinge 221, second adjustment rod 23, fixing rod 230, Positioning pile 24, first adjusting rod 25, Oblique composite pile support 3, cement soil pile 30, steel core material 31, The first end plate 310, the oblique support 32, the third end plate 311, The second end plate 320, the top pressure beam 4, and the top pressure plate 40. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is claimed, but merely represents the selected embodiments of the present application.
[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0021] In addition, it should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information.
[0022] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically limited. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.
[0023] In this application, 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 this application can be understood according to specific circumstances.
[0024] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0025] Please refer to Figures 1 to 6As shown, the present application provides an oblique composite pile support 3 system, which includes a foundation pit retaining pile 1, a positioning device 2, an oblique composite pile support 3 and a capping mechanism. The foundation pit retaining pile 1 is arranged in the vertical direction, and the positioning device 2 includes a base 21, a positioning pile 24 arranged at the bottom of the base 21, and an adjustment mechanism arranged at the top of the base 21. The capping mechanism includes a capping beam 4 and a capping plate 40 integrally formed with the capping beam and protruding from the capping beam. The oblique composite pile support 3 includes a cement column buried in the foundation pit soil and a steel core material 31 cast as one with the cement column, and the radial dimension of the steel core material 31 is smaller than the radial dimension of the cement soil pile 30. The steel core material 31 partially passes through the adjustment mechanism and is fixedly connected to the capping mechanism and forms an acute angle with the foundation pit retaining pile 1. The capping mechanism is arranged at the top of the foundation pit retaining pile 1. The steel core material 31 is provided with an oblique support 32 that can be detachably assembled with the capping mechanism. The four corners of the base 21 are provided with assembly holes 211, and the positioning piles 24 are embedded in the assembly holes 211 to assemble with the base 21 and support the base 21. The positioning device 2 is placed on a flat ground excavated from a foundation pit to ensure the overall reliability of the oblique composite pile support 3 system.
[0026] In one embodiment, the top end of the steel core material 31 is assembled with the top plate 40 via end plate bolts, and the inclined supports 32 are detachably assembled on both sides of the steel core material 31 and are respectively assembled and fixed with the top plate 40 via end plate bolts.
[0027] Specifically, the steel core material 31 is an H-shaped steel and has a first end plate 310 with reserved bolt openings welded at one end. The first end plate 310 is horizontally arranged and assembled with the top plate 40. Bolt openings are reserved at the connection between the web of the steel core material 31 and the inclined support 32.
[0028] The oblique support 32 is an H-shaped steel with a second end plate 320 and a third end plate 311 welded at both ends with reserved bolt openings. The second end plate 320 is assembled and fixed with the top plate 40; the third end plate 311 is assembled and fixed with the web of the profile steel core material 31; the two oblique support 32 H-shaped steels form a set of eight-shaped braces. The third end plate 311 is assembled and fits with the web of the profile steel core material 31. The third end plate 311 is provided with through holes corresponding to the reserved bolt openings of the web of the profile steel core material 31 for the bolts to pass through.
[0029] The adjustment mechanism includes a positioner 20, a hinge device 22 connecting the positioner 20 and the base 21, and an adjustment rod capable of adjusting the angle between the positioner 20 and the base 21. The adjustment rod includes a first adjustment rod 25 arranged on the base 21 and a second adjustment rod 23 arranged on the positioner 20. The first adjustment rod 25 and the second adjustment rod 23 are provided with matching assembly holes 211 and are assembled and fixed by means of a fixing rod 230. The first adjustment rod 25 and the second adjustment rod 23 are equal arcs. Specifically, the hinge device 22 connects the upper hinge 220 and the positioner 20 through the positioner bolts, and connects the lower hinge 221 and the base 21 through the base bolts. The positioner 20 can rotate around the hinge device shaft at a certain angle. The first adjustment rod 25 and the second adjustment rod 23 are provided with corresponding assembly holes according to the different angles at which the positioner 20 rotates around the base 21.
[0030] The positioner 20 and the base 21 are both U-shaped steel plates. A first accommodating cavity 210 is provided at the center of the base 21, and a second accommodating cavity 200 is provided at the center of the positioner 20. The projection of the second accommodating cavity 200 is located within the projection area of the first accommodating cavity 210. The steel core material 31 passes through the first accommodating cavity 210 and the second accommodating cavity 200 and is assembled and fixed with the top pressing mechanism. In the embodiment of the present application, two first adjustment rods 25 are provided in parallel and are arranged on the left and right sides of the first accommodating cavity 210; only two second adjustment rods 23 are provided in parallel and are arranged on the left and right sides of the second accommodating cavity 200. The center distance of the second adjustment rod 23 is greater than the center distance of the first adjustment rod 25. After assembly, the first adjustment rod 25 is located on the inner side of the second adjustment rod 23.
[0031] The present application also provides a construction method of the oblique composite pile support system as described above, comprising the following steps: Step 10: construct foundation pit retaining piles 1; Step 20: partially excavate the foundation pit to the elevation of the positioning device 2, and mark the position of the oblique composite pile support 3; in order to achieve the best effect, in this step, first level the surrounding site and then mark the position of the oblique composite pile support 3, and then enter step 30; Step 30: Drive four positioning piles 24 into the soil according to the placement position of the positioning device 2 and keep some of the piles outside the soil, assemble the base 21 with the positioning piles 24, and adjust the inclination angle of the positioner 20 according to the pile positions; specifically, assembling the base 21 with the positioning piles 24 means lifting the base 21 to align the assembly holes 211 at the bottom of the base 21 and the positioning piles 24, and assembling the positioning device 2 after placing the base 21. After adjusting the inclination angle of the positioner 20, fix the first adjustment rod 25 and the second adjustment rod 23, and proceed to step 40; Step 40: construct the cement soil pile 30, then lift the steel core material 31 and put it into the second accommodation cavity 200 and the first accommodation cavity 210 at the center of the positioner 20, and partially drive the steel core material 31 into the cement soil pile 30, wait for the oblique composite pile support 3 to be cured to the design strength, and then enter step 50; specifically, use professional equipment to construct the cement soil pile 30, then lift the steel core material 31 and put it into the positioner 20 to open the hole, use professional pile delivery equipment to drive the steel core material 31 into the soil, recycle the positioning device 2, wait for the oblique composite pile support 3 to be cured to the design strength, and then enter step 50; Step 50: excavate the foundation pit to the bottom elevation of the top pressing mechanism, support the formwork and tie the steel bars of the top pressing beam 4 and the top pressing plate 40 on the top of the foundation pit retaining pile 1, tie the end plate bolts of the steel core material and the steel bars of the top pressing plate, and finally cast the top pressing beam 4 and the top pressing plate 40 as a whole; after the strength of the top pressing beam 4 and the top pressing plate 40 reaches the design strength, enter step 60; Step 60: excavate the foundation pit to the bottom elevation of the inclined support 32, first hoist one side of the inclined support to the corresponding installation position of the steel core material, then install the web bolts and the inclined support end plate bolts, and at the same time tie the inclined support end plate bolts and the steel bars of the top plate; then install the other side of the inclined support in the same way, and finally cast the inclined support top plate. After the strength of the top plate reaches the design strength, enter step 70; Step 70: After excavating the earth to the bottom elevation of the foundation pit, cast the foundation pit bottom plate. After the bottom plate is replaced, cut the end plate bolts of the oblique composite pile support and the top plate, and recycle the oblique composite pile support.
[0032] Specifically, after the steel core material is driven into the cement soil pile in step 40, the method further includes recovering the positioning device.
[0033] Furthermore, the end plate bolts described in step 50 are long-rod bolts, so that the end plate bolts can be inserted into the top plate and tied to the steel bars, and holes are opened in the template of the top plate according to the positions where the end plate bolts are inserted, and then the end plate bolts are inserted.
[0034] Furthermore, when only the diagonal support needs to be recovered in step 70, the end plate bolts of the diagonal support can be cut and the web bolts can be removed before recovery.
[0035] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.
Claims
1. An oblique composite pile support system, characterized in that: Including foundation pit retaining piles, fixed A positioning device, an inclined composite pile support and a capping mechanism; the foundation pit retaining piles are arranged in a vertical direction, the positioning device includes a base, a positioning pile arranged at the bottom of the base and an adjusting mechanism arranged at the top of the base, the capping mechanism includes a capping beam and a capping plate integrally formed with the capping beam and protruding from the capping beam, the inclined composite pile support includes a cement column buried in the foundation pit soil and a steel core material cast as one with the cement column, a portion of the steel core material passes through the adjusting mechanism and is fixedly connected to the capping mechanism and forms an acute angle with the foundation pit retaining pile, the capping mechanism is arranged at the top of the foundation pit retaining pile, and the steel core material is provided with an inclined support that can be detachably assembled with the capping mechanism.
2. The oblique composite pile support system according to claim 1, characterized in that: The top end of the steel core material is assembled with the top plate through end plate bolts, and the oblique supports are detachably assembled on both sides of the steel core material and are respectively assembled and fixed with the top plate through end plate bolts.
3. The oblique composite pile support system according to claim 2, characterized in that: The adjustment mechanism includes a positioner, a hinge device connecting the positioner and the base, and an adjustment rod that can adjust the angle between the positioner and the base. The adjustment rod includes a first adjustment rod arranged on the base and a second adjustment rod arranged on the positioner. The first adjustment rod and the second adjustment rod are provided with adaptive assembly holes and are assembled and fixed by means of a fixing rod. The first adjustment rod and the second adjustment rod are equal arcs.
4. The oblique composite pile support system according to claim 3, characterized in that: The positioner and the base are both U-shaped steel plates, a first accommodating cavity is provided at the center of the base, a second accommodating cavity is provided at the center of the positioner, the projection of the second accommodating cavity is located within the projection area of the first accommodating cavity, and the steel core material passes through the first accommodating cavity and the second accommodating cavity and is assembled and fixed with the top pressing mechanism.
5. The oblique composite pile support system according to claim 4, characterized in that: The steel core material is H-shaped steel and has a first end plate welded at one end with a reserved bolt opening, and the first end plate is assembled with the top plate; bolt openings are reserved at the connection between the web of the steel core material and the oblique support.
6. The oblique composite pile support system according to claim 5, characterized in that: The oblique support is an H-shaped steel with a second end plate and a third end plate welded at both ends with reserved bolt openings, and the second end plate is assembled and fixed with the top plate; the two oblique support H-shaped steels form a group of eight-shaped supports.
7. A construction method for the oblique composite pile support system according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 10: Construction of foundation pit retaining piles; Step 20: Partially excavate the foundation pit to the elevation of the positioning device placement position, and mark the pile position of the oblique composite pile support; Step 30: Drive four positioning piles into the soil according to the position of the positioning device and keep some piles outside the soil, assemble the base and the positioning piles, and adjust the inclination angle of the positioner according to the pile position; Step 40: construct cement soil piles, then lift the steel core material and place it into the second accommodation cavity in the center of the positioner and drive the steel core material part into the cement soil pile, wait for the oblique composite pile to be supported and cured to the design strength, and then enter step 50; Step 50: excavate the foundation pit to the bottom elevation of the top pressing mechanism, support the formwork and tie the steel bars of the top pressing beam and the top pressing plate on the top of the foundation pit retaining piles, tie the end plate bolts of the steel core material and the steel bars of the top pressing plate, and finally cast the top pressing beam and the top pressing plate as a whole; after the strength of the top pressing beam and the top pressing plate reaches the design strength, enter step 60; Step 60: excavate the foundation pit to the bottom elevation of the inclined support, first hoist one side of the inclined support to the corresponding installation position of the steel core material, then install the web bolts and the inclined support end plate bolts, and at the same time tie the inclined support end plate bolts and the steel bars of the top plate; then install the other side of the inclined support in the same way, and finally cast the inclined support top plate. After the strength of the top plate reaches the design strength, enter step 70; Step 70: After excavating the earth to the bottom elevation of the foundation pit, cast the foundation pit bottom plate. After the bottom plate is replaced, cut the end plate bolts of the oblique composite pile support and the top plate, and recycle the oblique composite pile support.
8. The construction method according to claim 7, characterized in that: After the steel core material is partially driven into the cement soil pile in step 40, the positioning device is recovered.
9. The construction method according to claim 8, characterized in that: The end plate bolts described in step 50 are long-rod bolts, so that the end plate bolts can be inserted into the top plate and tied with the steel bars, and holes are opened in the template of the top plate according to the positions where the end plate bolts are inserted, and then the end plate bolts are inserted.
10. The construction method according to claim 9, characterized in that: When only the diagonal support needs to be recovered in step 70, the end plate bolts of the diagonal support can be cut and the web bolts can be removed for recovery.