Prefabricated combined supporting structure
By using the sharp corner structure and splicing grooves of prefabricated piles and plates in the prefabricated composite support structure for splicing, the problems of high splicing difficulty and large amount of piles used in the prior art are solved, and the effect of reducing the amount of piles used and reducing construction difficulty is achieved.
Patent Information
- Application Number
- CN202421909635.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The existing prefabricated support pile enclosure structure needs to be accurately operated during the splicing process, and there are problems such as increased pile usage, high cost and high construction difficulty.
A prefabricated combined support structure is adopted, including two prefabricated piles and one prefabricated plate. The prefabricated piles have sharp corner structures extending along the length direction. Both ends of the prefabricated plates are provided with splicing grooves that are suitable for the sharp corner structure, and splicing is completed by inserting the splicing grooves into the splicing grooves.
It reduces the amount of piles used, reduces construction difficulty, saves costs, and improves the stability and soil retaining effect of the combined support structure.
Smart Images
Figure CN222936001U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of support, in particular to a prefabricated combined support structure. Background Art
[0002] In recent years, with the continuous development of precast concrete components, more and more assembled precast structures have been applied to foundation pit or riverway support projects. Compared with traditional support methods such as row piles and diaphragm walls, in some actual projects, the use of precast support piles not only reduces the cost investment but also significantly shortens the construction period and simplifies the construction process.
[0003] However, for the precast support pile retaining structure, generally, a mortise and tenon structure is used to splice the row piles. The use of a row structure will increase the amount of piles used, increasing the cost investment, and the docking of the mortise and tenon requires precise operation. However, factors such as soil squeezing effect and construction deviation exist during the pile driving process, greatly increasing the construction difficulty. Summary of the Utility Model
[0004] The utility model provides a prefabricated combined support structure, which can reduce the amount of piles used and reduce the construction difficulty.
[0005] To solve the above problems, the utility model adopts the following technical scheme:
[0006] An embodiment of the utility model provides a prefabricated combined support structure, including two precast piles and a precast slab; the precast piles have two pointed corner structures respectively located on both sides thereof and arranged opposite to each other, and the pointed corner structures extend along the length direction of the precast piles; the precast slab is arranged between the two precast piles, and both ends of the precast slab are provided with splicing grooves adapted to the pointed corner structures, the splicing grooves penetrate through the precast slab in the vertical direction, and the pointed corner structures of the two precast piles close to the precast slab are respectively inserted into the splicing grooves at both ends of the precast slab.
[0007] In some embodiments, a part of both end faces of the precast slab is recessed inward to form the splicing grooves.
[0008] In some embodiments, both end faces of the precast slab are inclined, and in the direction away from the soil body, both end faces of the precast slab gradually approach each other, and the outer sides of both end faces of the precast slab form the splicing grooves, and both end faces of the precast slab are respectively located on the side close to the soil body of the pointed corner structures of the two precast piles close to the precast slab.
[0009] In some embodiments, both ends of the precast slab have two outwardly protruding fork plates, and in the outwardly protruding direction, the distance between the two fork plates at the same end of the precast slab gradually increases, so as to form the splicing grooves between the two fork plates at the same end of the precast slab.
[0010] In some embodiments, the precast pile is a square pile, and the sharp corner structures are formed at the four corners of the square pile, and one of the sharp corner structures is used to face the soil body in the protection area.
[0011] In some embodiments, the precast pile has a hollow central hole.
[0012] In some embodiments, the precast pile includes a pile body made of concrete and pile main reinforcement bars embedded in the pile body.
[0013] In some embodiments, the precast slab includes a slab body made of concrete and slab main reinforcement bars embedded in the slab body.
[0014] The utility model has at least the following beneficial effects: The utility model uses precast piles and precast slabs to be spliced to form a combined supporting structure. Compared with the existing row piles, the amount of piles used is reduced and the cost is saved; at the same time, the sharp corner structure of the precast pile is inserted into the splicing groove of the precast slab, thereby completing the splicing of the combined supporting structure and reducing the construction difficulty. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic cross-sectional view of a precast combined supporting structure according to an embodiment of the utility model;
[0016] Figure 2 is Figure 1 the structural schematic diagram of the precast slab in
[0017] Figure 3 It is a schematic cross-sectional view of a precast combined supporting structure according to another embodiment of the utility model;
[0018] Figure 4 is Figure 3 the structural schematic diagram of the precast slab in
[0019] Figure 5 It is a schematic cross-sectional view of a precast combined supporting structure according to still another embodiment of the utility model;
[0020] Figure 6 is Figure 5 the structural schematic diagram of the precast slab in
[0021] Figure 7 It is a schematic structural diagram of a precast pile according to an embodiment of the utility model;
[0022] Figure 8 It is a construction schematic diagram corresponding to Step 1 according to an embodiment of the utility model;
[0023] Figure 9 It is a construction schematic diagram corresponding to Step 4 according to an embodiment of the utility model;
[0024] Figure 10 is Figure 9 an enlarged schematic view of location A in
[0025] Figure 11 is the construction schematic diagram corresponding to after step 7 of an embodiment of the present utility model;
[0026] Figure 12 is Figure 11 an enlarged schematic view of location B in
[0027] Among them, the reference numerals are:
[0028] precast pile 100, pile main reinforcement 101, central hole 102, sharp corner structure 110;
[0029] precast slab 200, slab main reinforcement 201, splicing groove 210, fork plate 220;
[0030] soil body 300, positioning axis 310, trench 320, end position 330
[0031] river channel area 400;
[0032] first filler 510, second filler 520. Detailed implementation manners
[0033] The present utility model provides the following description with reference to the drawings to help a comprehensive understanding of various embodiments of the present utility model as defined by the claims and their equivalents. The description includes various specific details to help understanding, but these details should be regarded as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the present utility model.
[0034] In the description of the present utility model, the orientation description is involved. For example, the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.
[0035] It should be understood that when an element (for example, the first element) is "connected" to another element (for example, the second element), the element can be directly connected to the other element, or there can be an intermediate element (for example, the third element) between the element and the other element.
[0036] An embodiment of the present utility model provides a precast combined supporting structure, such as Figure 1 and Figure 2As shown, it includes two precast piles 100 and a precast slab 200. The precast pile 100 has two pointed corner structures 110 respectively located on its two sides and arranged opposite to each other, and the pointed corner structures 110 extend along the length direction of the precast pile 100. The precast slab 200 is arranged between the two precast piles 100, and splicing grooves 210 adapted to the pointed corner structures 110 are provided at both ends of the precast slab 200. The splicing grooves 210 penetrate the precast slab 200 in the vertical direction. Thus, during construction, the pointed corner structures 110 can be vertically inserted into the splicing grooves 210 to facilitate driving or placing the precast slab 200 between the two precast piles 100, and the pointed corner structures 110 of the two precast piles 100 close to the precast slab 200 are respectively inserted into the splicing grooves 210 at both ends of the precast slab 200.
[0037] Thus, in this embodiment, the precast piles 100 and the precast slab 200 are spliced to form a combined supporting structure. Compared with the existing row piles, the amount of piles used is significantly reduced, thus saving costs. During construction, the pointed corner structures 110 of the precast piles 100 are inserted into the splicing grooves 210 of the precast slab 200 to complete the splicing of the combined supporting structure, reducing the construction difficulty. After construction, the precast piles 100 and the precast slab 200 can maintain a stable splicing state, effectively ensuring the soil retaining effect of the entire combined supporting structure, and there is no need to additionally add a waterproof curtain on the outside, which further reduces the cost investment, simplifies the construction process, and shortens the construction period.
[0038] In this embodiment, the pointed corner structure 110 can be triangular or other pointed corner shapes; in the length direction of the precast pile 100, the pointed corner structure 110 can cover the entire precast pile 100, or only extend a certain distance on the precast pile 100; the two relatively arranged pointed corner structures 110 can be symmetric with respect to the center or the midline of the precast pile 100, so that the two pointed corner structures 110 of the precast pile 100 can be on the same positioning axis during pile driving, facilitating the splicing of the precast slab 200 and the precast pile 100.
[0039] In order to form splicing grooves 210 at both ends of the precast slab 200, several specific embodiments for forming the splicing grooves 210 will be provided below.
[0040] In one embodiment, as Figure 1 and Figure 2 shown, a part of both end faces of the precast slab 200 is recessed to form the splicing grooves 210, and the pointed corner structures 110 of the precast pile 100 are directly inserted into the recessed splicing grooves 210. Such splicing grooves 210 are easy to form, and the precast slab 200 is also easier to be flush with the positioning axis.
[0041] In another embodiment, as Figure 3 and Figure 4As shown, both end faces of the precast slab 200 are inclined, specifically inclined in the direction relatively far from the soil body. In the direction away from the soil body, both end faces of the precast slab 200 gradually approach each other, so that the cross-sectional shape of the entire precast slab 200 forms a shape similar to a trapezoid. This is equivalent to cutting off a part at both ends of the precast slab 200, thereby forming splicing grooves 210 on the outer sides of both end faces of the precast slab 200. Both end faces of the precast slab 200 are respectively located on the side close to the soil body of the pointed corner structures 110 of the two precast piles 100 close to the precast slab 200.
[0042] The splicing grooves of this structure are more easily docked with the pointed corner structures 110, further reducing the construction difficulty. In the actual application scenario, the side of the precast slab 200 close to the soil body will be subjected to the extrusion pressure of the soil body, and this extrusion pressure is parallel to the direction away from the soil body, thereby pressing the precast slab 200 tightly against the pointed corner structures 110 of the two precast piles 100. This enables the entire combined support structure to stably support the soil body. At the same time, under the action of the pressure of the soil body, they can be firmly spliced together with each other.
[0043] In another embodiment, as Figure 5 and Figure 6 shown, both ends of the precast slab 200 have two outwardly protruding fork plates 220. In the direction of outward protrusion, the distance between the two fork plates 220 at the same end of the precast slab 200 gradually increases, so as to form a splicing groove 210 between the two fork plates 220 at the same end of the precast slab 200. Compared with the first embodiment, when the width of the splicing groove 210 is the same, the thickness of the precast slab 200 can be reduced, thereby reducing the material used for the precast slab 200 to further reduce the manufacturing cost of the entire combined support structure.
[0044] In some embodiments, as Figure 7 shown, the precast pile 100 is a square pile, and pointed corner structures 110 are formed at all four corners of the square pile, thus having four pointed corner structures 110. The square pile is a conventional pile type, and its forming process is relatively mature and easy to manufacture. The square pile has two sets of relatively arranged pointed corner structures 110. During construction, any set of two relatively pointed corner structures 110 can be selected for splicing with the precast slab, and there are more choices during construction operations, making it easier to construct. At the same time, the square pile is relatively regular, and the two pointed corner structures 110 on both sides of the square pile are more easily aligned with the positioning axis.
[0045] After construction, one of the pointed corner structures 110 of the square pile faces the soil body in the protected area. On the premise of ensuring that the pile body provides sufficient flexural stiffness, its soil retaining performance is also increased compared with the traditional flat surface facing the soil retaining side. This combined structure of the square pile and the precast slab reduces the soil squeezing effect caused by too close pile spacing and greatly reduces the construction difficulty.
[0046] Of course, according to actual needs, the precast pile 100 can also be a hexagonal column pile, an octagonal column pile, or a pile structure of other shapes.
[0047] In some embodiments, as Figure 1 and Figure 7 shown, the precast pile 100 has a hollow central hole 102. On the premise of ensuring the structural strength of the pile body, the existence of the central hole 102 can reduce the material used for the precast pile 100, thereby reducing the manufacturing cost.
[0048] In this embodiment, the precast pile 100 can be formed by a centrifugal process. For a solid precast pile without a central hole, it can be formed by using a pile mold.
[0049] In some embodiments, as Figure 1 shown, the precast pile 100 includes a pile body made of concrete and pile main reinforcement bars 101 embedded in the pile body to enhance the structural strength of the entire precast pile 100.
[0050] The precast slab 200 includes a slab body made of concrete and slab main reinforcement bars 201 embedded in the slab body, so that the precast slab 200 forms a precast concrete slab. This structure can also enhance the structural strength of the entire precast slab 200. Of course, according to actual needs, the precast slab 200 can also be a hollow steel plate or other plates.
[0051] An embodiment of the present invention provides a construction method for the precast combined support structure of any of the above embodiments. For the specific description of the precast combined support structure, reference can be made to the above embodiments and will not be elaborated here. The construction method includes the following steps:
[0052] (1) Set the positioning axis and pile layout position of the precast pile in the construction area, rotate the precast pile until the connection line of the tips of the pointed structures on both sides of it is parallel to the pile layout axis, and then use a pile driver to hammer the precast pile into the pile layout position one by one.
[0053] As Figure 8 shown, the positioning axis 310 is the reference line for positioning the row of the entire combined support structure, and the pile layout position is located on the positioning axis 310, which is the position where the precast pile needs to be driven. The spacing between adjacent two pile layout positions naturally needs to be set in advance to leave space for assembling the precast slab. A lifting device can be used to lift the precast pile 100 and rotate the precast pile 100 during the lifting process. The connection line of the tips of the pointed structures on both sides of the precast pile 100 is parallel to the pile layout axis 310. On the one hand, it can make the orientations of all the precast piles 100 relatively unified, and the entire combined support structure is relatively regular, capable of providing relatively uniform support force. On the other hand, this facilitates the connection of the precast slab with the pointed structures at its two ends.
[0054] Figure 8Among them, the soil mass 300 is the soil mass that needs to be supported by the retaining wall, and on the side opposite to the soil mass 300 is the river channel area 400 or structures such as an excavated foundation pit, etc.
[0055] (2) Judge whether the on-site conditions meet the requirements for driving precast slabs.
[0056] Since precast slabs are different from precast piles and have different tolerances for being driven into the soil, if the on-site conditions are not considered, the precast slabs may be damaged or even cracked during driving. Therefore, before proceeding to the next process, it is necessary to judge whether the on-site conditions meet the requirements for driving precast slabs.
[0057] (3) If the on-site conditions meet the requirements for driving precast slabs, align the splicing grooves at both ends of the precast slab with the pointed corner structures close to the precast slab of two adjacent precast piles respectively, and then use a pile driver to drive the precast slab into the space between the two adjacent precast piles, so that the pointed corner structures close to the precast slab of the two adjacent precast piles are respectively inserted into the splicing grooves at both ends of the precast slab.
[0058] If the on-site conditions meet the requirements for driving precast slabs, the precast slabs can be driven into the soil. Specifically, a lifting device can be used to lift the precast slab, and then adjust the angle of the precast slab so that the splicing grooves at both ends of the precast slab are respectively aligned with the pointed corner structures close to the precast slab of two adjacent precast piles, and then vertically drive the precast slab into the soil mass. The pointed corner structures close to the precast slab of the two adjacent precast piles will naturally be respectively inserted into the splicing grooves at both ends of the precast slab, completing the construction of the entire precast combined support structure.
[0059] (4) If the on-site conditions do not meet the requirements for driving precast slabs, excavate a groove on the positioning axis between two adjacent precast piles, the width of the groove is slightly larger than the thickness of the precast slab, and the depth of the groove is equivalent to the height of the precast slab.
[0060] If the on-site conditions do not meet the requirements for driving precast slabs, the precast slabs cannot be driven into the soil, and other methods should be adopted. Specifically, as Figure 9 shown, excavate a groove 320 on the positioning axis between two adjacent precast piles 100. The cross-sectional shape of the groove 320 is adapted to the cross-sectional shape of the precast slab. The width of the groove 320 is slightly larger than the thickness of the precast slab, and the depth of the groove 320 is equivalent to the height of the precast slab, so that the precast slab can be placed into the groove 320.
[0061] Among them, a groove 320 can be excavated by using excavation equipment such as an excavator or by manual excavation.
[0062] (5) Use a lifting device to lift the precast slab according to the splicing position and place it into the excavated groove, so that the pointed corner structures close to the precast slab of two adjacent precast piles are respectively inserted into the splicing grooves at both ends of the precast slab.
[0063] After the trench is excavated, the precast slab is lifted according to the splicing position and placed into the excavated trench. The pointed corner structures of two adjacent precast piles close to the precast slab are respectively inserted into the splicing grooves at both ends of the precast slab to achieve the preliminary splicing of the precast slab and the precast piles.
[0064] (6) Subsequently, a first filler is poured into the gap between the pointed corner structure of the precast pile and the splicing groove of the precast slab to fill the gap.
[0065] As Figure 11 and Figure 12 shown, since the size of the trench is larger than the size of the precast slab 200, this will cause a gap to form between the pointed corner structure 110 of the precast pile 100 and the splicing groove of the precast slab 200. Pour the first filler 510 into this gap to fill the gap, so as to improve the tightness of the connection.
[0066] (7) Pour a second filler into the gap between the soil body adjacent to the protection area and the precast slab to fill the gap.
[0067] As Figure 11 and Figure 12 shown, since the size of the trench is larger than the size of the precast slab 200, this will also cause a gap between the soil body 300 in the protection area adjacent to the precast slab 200 and the precast slab 200. Pour the second filler 520 into this gap to fill the gap, so as to improve the tightness between the precast slab 200 and the soil body 300.
[0068] In some embodiments, the conditions for hammering the precast slab are whether the soil quality in the construction area is loose and whether the distance between two adjacent precast piles is less than or equal to 2 m. When the soil quality in the construction area is loose and the distance between two adjacent precast piles is less than or equal to 2 m, the on-site conditions meet the conditions for hammering the precast slab. Otherwise, the on-site conditions do not meet the conditions for hammering the precast slab, that is, the three situations where the soil quality in the construction area is not loose and the distance between two adjacent precast piles is less than or equal to 2 m, the soil quality in the construction area is loose and the distance between two adjacent precast piles is greater than 2 m, and the soil quality in the construction area is not loose and the distance between two adjacent precast piles is greater than 2 m do not meet the conditions for hammering the precast slab.
[0069] The loose soil quality in the construction area makes the precast slab easy to be hammered into the soil. The distance between two precast piles is less than or equal to 2 m, which correspondingly restricts the width of the precast slab. The smaller the width of the precast slab, the easier it is to be hammered into the soil.
[0070] In some embodiments, for the case with a lower tightness requirement, the first filler includes fine sand, which has a low cost and is easy to obtain. For the case with a higher tightness requirement, the first filler includes cement mortar to further improve the tightness of the connection.
[0071] In some embodiments, for cases with lower tightness requirements, the second filler includes fill soil, which has a low cost and is easily obtainable. For cases with higher tightness requirements, the second filler includes slightly expanded concrete to further improve the contact tightness between the precast slab and the supported soil mass.
[0072] In some embodiments, as Figure 10 shown, since the two ends of the trench 320 are the two ends where the precast slabs are placed, the two ends of the precast slabs need to be spliced with the corner structures 110, and the end positions 330 at the two ends of the trench 320 also need to be adapted to the ends of the precast slabs accordingly. The structure at this position is relatively special, and in order to avoid damaging the corner structures 110, the soil mass at the end positions 330 is excavated manually or with small excavation tools to form a complete trench 320.
[0073] In some embodiments, before step (1), it further includes the steps of manufacturing precast slabs and precast piles. A precast pile mold can be used to manufacture precast slabs, a precast pile mold can be used to manufacture precast piles, or precast piles can be manufactured by a centrifugal process.
[0074] In some embodiments, after step (7), it further includes the following steps: inspecting, repairing, and accepting the caulking. After passing the inspection, the construction process of the combined support structure is completed, and subsequent construction processes such as foundation pit excavation can be carried out.
[0075] The terms and words used in the above description and claims are not limited to their literal meanings, but are only used by the applicant to enable a clear and consistent understanding of the present utility model. Therefore, those skilled in the art should clearly understand that the above description of various embodiments of the present utility model is only for the purpose of illustration, rather than for limiting the present utility model as defined by the appended claims and their equivalents.
Claims
1. A prefabricated combined support structure, characterized in that: The utility model comprises two prefabricated piles and a prefabricated board; the prefabricated piles have two pointed angle structures respectively located on both sides thereof and arranged opposite to each other, and the pointed angle structures extend along the length direction of the prefabricated piles; the prefabricated board is arranged between the two prefabricated piles, and both ends of the prefabricated board are provided with splicing grooves adapted to the pointed angle structures, and the splicing grooves penetrate the prefabricated board in the vertical direction, and the pointed angle structures of the two prefabricated piles close to the prefabricated board are respectively embedded in the splicing grooves at both ends of the prefabricated board.
2. The prefabricated combined support structure according to claim 1 is characterized in that: Parts of the two end surfaces of the prefabricated plate are both concave to form the splicing groove.
3. The prefabricated combined support structure according to claim 1 is characterized in that: The two end faces of the precast plate are both inclined, and gradually approach each other in the direction away from the soil. The outer sides of the two end faces of the precast plate form the splicing groove. The two end faces of the precast plate are respectively located on the side of the sharp-angle structure of the two precast piles close to the soil.
4. The prefabricated combined support structure according to claim 1 is characterized in that: Both ends of the prefabricated board have two fork plates protruding outwards, and in the outward protruding direction, the distance between the two fork plates located at the same end of the prefabricated board gradually increases to form the splicing groove between the two fork plates located at the same end of the prefabricated board.
5. The prefabricated combined support structure according to any one of claims 1 to 4, characterized in that: The prefabricated pile is a square pile, and the four corners of the square pile all form the pointed structures, and one of the pointed structures is used to face the soil of the protection area.
6. The prefabricated combined support structure according to any one of claims 1 to 4, characterized in that: The precast pile has a hollow central hole.
7. The prefabricated combined support structure according to any one of claims 1 to 4, characterized in that: The prefabricated pile comprises a pile body made of concrete and pile main reinforcement buried in the pile body.
8. The prefabricated combined support structure according to any one of claims 1 to 4, characterized in that: The prefabricated panel comprises a panel body made of concrete and main panel reinforcements embedded in the panel body.