A support mechanism for the installation of prefabricated concrete panels

Abstract

The application discloses a support mechanism for mounting of fabricated precast concrete slabs, which comprises a soft soil layer, a foundation soil layer, a sand cushion layer and a precast slab layer are sequentially arranged on the soft soil layer from bottom to top; the precast slab layer is formed by arranging a plurality of precast slabs connected with each other in a row; the precast slab layer, the foundation soil layer and the sand cushion layer are provided with support units for balancing the extrusion force caused by the unbalanced stress of the precast slab layer due to gravity during the driving of a vehicle; the foundation soil layer and the sand cushion layer are sequentially arranged on the soft soil layer from bottom to top, so that a support system is preliminarily formed; the support units are arranged on the support system, so that the extrusion force caused by the unbalanced stress of the precast slab layer due to gravity is balanced, and the precast slab layer, the foundation soil layer and the sand cushion layer are uniformly protected from stress, so that the foundation layer is prevented from being damaged during temporary use and the temporary use period is prolonged.

Description

Technical Field

[0001] This invention relates to the field of prefabricated pavement technology, specifically to a support mechanism for the installation of prefabricated concrete slabs. Background Technology

[0002] In traditional highway and railway construction sites, a certain length of concrete pavement is often poured as a temporary road (or access road). In addition, to address the load-bearing capacity of freight vehicles, the thickness of the concrete pavement is usually controlled to be more than 20 cm during construction.

[0003] However, when this construction method is applied to soft soil areas, even if the base soil layer is controlled to be above 20cm, the soft soil in these areas is relatively loose, which can lead to road surface deformation after long-term vehicle compaction.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a support mechanism for the installation of precast concrete slabs, in order to solve the problem mentioned in the background art that when the traditional concrete pouring construction method is applied to soft soil areas, even if the base soil layer is controlled to be above 20cm, the soft soil in the soft soil area will cause road surface deformation after long-term vehicle rolling.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a support mechanism for the installation of precast concrete slabs, comprising a soft soil layer, wherein a base soil layer, a sand cushion layer, and a precast slab layer are laid sequentially from bottom to top on the soft soil layer;

[0007] The precast slab layer is formed by multiple precast slabs connected in rows and laid out; and

[0008] Support units are provided on the precast slab, the base soil layer, and the sand cushion layer to balance the compressive force caused by the uneven force distribution of the precast slab due to gravity during vehicle operation.

[0009] Preferably, the support unit includes:

[0010] Multiple support discs are disposed on the inner surface of the precast slab, and the precast slab is provided with disc grooves for placing the support discs;

[0011] The foundation piles are coaxially arranged with the supporting disc and embedded in the foundation soil layer;

[0012] The connecting shaft is hinged at one end to the supporting disc ball, and fixed at the center of the foundation pile at the other end;

[0013] A balancing component, positioned between the foundation pile and the support disk, is used to balance the strain forces acting on the support disk.

[0014] Preferably, the balancing component includes:

[0015] Multiple sets of elastic tension members are arranged in an array at an angle on the foundation pile;

[0016] Multiple sets of pressure-balancing components are evenly spirally arranged on the connecting shaft from top to bottom, and are staggered with multiple sets of elastic tension components, thereby achieving a better balance effect.

[0017] Preferably, the elastic tension member includes:

[0018] The tie rod is fixedly installed on the side wall of the foundation pile. It is hollow inside, and a slider is slidably installed in the hollow part. The slider is connected to the tie rope, and the other end of the tie rope is fixed to the outer wall of the support disc near the outer edge.

[0019] The traction spring is fitted onto the traction rope located between the slider and the hollow position of the traction rod.

[0020] Preferably, the pressure-balancing component includes:

[0021] A folded, counterweight frame is fixedly mounted on the connecting shaft;

[0022] Two sets of sliding grooves are symmetrically arranged at the upper and lower ends of the folded shape of the pressure frame, respectively;

[0023] Two sets of convex sliding plates slide within the sliding grooves respectively, and a synchronous moving component is provided between the two sets of convex sliding plates;

[0024] Two sets of sleeve shafts are fixed to the far ends of two sets of convex sliding plates, respectively;

[0025] A connecting plate, one end of which is rotatably connected to the sleeve shaft, and the other end of which is rotatably connected to the support disc near its outer edge.

[0026] Preferably, the synchronous moving component includes a toothed groove disposed on the surfaces of the two sets of convex sliding plates that are close to each other, and a gear is rotatably disposed on the pressing frame located at the symmetrical center of the two sets of convex sliding plates, wherein the gear and the toothed groove are meshed together.

[0027] Preferably, the subgrade layer is a 30cm thick layer of waste brick debris material used as the subgrade layer for the temporary prefabricated road, which is then compacted and leveled layer by layer and laid on the soft soil area.

[0028] Preferably, the sand cushion layer is composed of fine sand and gravel mixed together and laid in a 10cm thick sand cushion layer.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. This invention establishes a preliminary support system by laying a base soil layer and a sand cushion layer sequentially from bottom to top on a soft soil layer. By setting support units on top of this system, the compressive stress caused by the uneven stress of the precast slab layer due to gravity can be balanced. At the same time, it provides uniform stress protection for the base layer formed by the precast slab layer, base soil layer and sand cushion layer, preventing damage to the base layer during temporary use and extending the temporary use period.

[0031] 2. The present invention, through the pre-embedded foundation piles in the support unit and the support discs set on the same axis, not only forms a support effect, but can also be used as a positioning surface for the installation of precast slabs, thereby greatly accelerating the efficiency of precast slab road installation. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of each foundation soil surface of the present invention;

[0033] Figure 2 This is a side view of a base plane of the present invention;

[0034] Figure 3 This is a schematic diagram showing the connection between the support unit and the precast slab layer of the present invention;

[0035] Figure 4 This is an overall structural diagram of the support unit of the present invention;

[0036] Figure 5 This is a partial cross-sectional view of the elastic tension member of the present invention;

[0037] Figure 6 This is a structural diagram of the pressure-retaining frame of the present invention;

[0038] Figure 7 This is a partial cross-sectional view of the pressure-balancing component of the present invention.

[0039] Reference numerals: 1-Soft soil layer; 2-Subgrade soil layer; 3-Sand cushion layer; 4-Precast slab layer; 5-Support unit; 51-Support disc; 52-Disc groove; 53-Foundation pile; 54-Connecting shaft; 55-Balancing component; 56-Elastic traction component; 561-Tethering rod; 562-Slider; 563-Tethering rope; 564-Traction spring; 57-Pressure balancing component; 571-Pressure frame; 572-Slide groove; 573-Convex sliding plate; 574-Synchronous moving component; 5741-Gear groove; 5742-Gear; 575-Sleeve shaft; 576-Connecting plate. Detailed Implementation

[0040] 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.

[0041] Please see Figure 1-7 The present invention provides a technical solution: a support mechanism for the installation of precast concrete slabs, comprising a soft soil layer 1, wherein a base soil layer 2, a sand cushion layer 3 and a precast slab layer 4 are laid sequentially from bottom to top on the soft soil layer 1.

[0042] The precast slab layer 4 is formed by multiple precast slabs interconnected and laid in rows; and

[0043] Support units 5 are provided on the precast slab layer 4, the base soil layer 2, and the sand cushion layer 3. These units are used to balance the compressive force caused by the uneven force distribution of the precast slab layer 4 due to gravity during vehicle operation. They also provide uniform stress protection for the base layer formed by the precast slab layer 4, the base soil layer 2, and the sand cushion layer 3, preventing damage to the base layer during temporary use and extending the temporary use period.

[0044] The support unit 5 includes:

[0045] Multiple support discs 51 are disposed on the inner surface of the precast slab, and the precast slab is provided with disc grooves 52 for placing the support discs 51.

[0046] The foundation pile 53 is coaxially set with the supporting disc 51 and buried in the foundation soil layer 2. It can be pre-cast into a cement pile by cement grouting and then buried in the pit.

[0047] The connecting shaft 54 ​​is ball-jointed to the supporting disk 51 at one end, and fixed to the center of the foundation pile 53 at the other end.

[0048] The balancing component 55 is disposed between the foundation pile 53 and the support disk 51 to balance the strain force on the support disk 51. When a vehicle drives over the precast slab layer 4, the change in position during the journey will generate different gravity forces at different positions of the precast slab. The changed gravity will be transmitted through the precast slab to different positions of the support disk 51, which will cause the support disk 51 to have a pre-rotation strain force along its ball joint. The balancing component 55 can balance this strain force at the symmetrical position of the support disk 51, thereby reducing the strain force and making the precast slab layer 4 more stable.

[0049] Additionally, the balancing component 55 includes:

[0050] Multiple sets of elastic tension members 56 are arranged in an array at an angle on the foundation pile 53;

[0051] Multiple sets of pressure-balancing components 57 are evenly spirally arranged on the connecting shaft 54 ​​from top to bottom, and are staggered with multiple sets of elastic tension components 56, thereby achieving a better balance effect.

[0052] Meanwhile, the elastic tension member 56 includes:

[0053] The tie rod 561 is fixedly installed on the side wall of the foundation pile 53. It is hollow inside, and a slider 562 is slidably installed in the hollow position. The tie rope 563 is connected to the slider 562. The other end of the tie rope 563 is fixed to the outer wall of the support disc 51 near the outer edge.

[0054] The traction spring 564 is sleeved on the traction rope located between the hollow positions of the slider 562 and the pull rod 561;

[0055] When the supporting disc 51 is subjected to strain, it tends to rotate, which will cause the tension rope 563 on the other side of the strain to stretch, thereby offsetting the compression force of the traction spring 564, thus reducing and balancing the magnitude of the strain.

[0056] The pressure-balancing component 57 includes:

[0057] The folded pressure frame 571 is fixedly mounted on the connecting shaft 54;

[0058] Two sets of sliding grooves 572 are symmetrically arranged at the upper and lower ends of the folded shape of the pressure frame 571, respectively;

[0059] Two sets of convex sliding plates 573 slide within the sliding grooves 572 respectively, and a synchronous moving member 574 is provided between the two sets of convex sliding plates 573;

[0060] Two sets of sleeve shafts 575 are respectively fixed to the far ends of two sets of convex sliding plates 573;

[0061] The connecting plate 576 is rotatably connected to the sleeve shaft 575 at one end and rotatably connected to the support disk 51 near the outer edge at the other end.

[0062] In addition, the synchronous moving member 574 includes a toothed groove 5741 disposed on the surfaces of the two sets of convex sliding plates 573 that are close to each other, and a gear 5742 is rotatably disposed on the pressing frame 571 located at the center of symmetry of the two sets of convex sliding plates 573, and the gear 5742 and the toothed groove 5741 are meshed together.

[0063] When the support disc 51 is subjected to strain force, and the strain force is transmitted to the support disc 51, the support disc 51 tends to rotate. The strain force is transmitted to the connecting plate 576, which provides a pulling force to the connecting plate 576. The support disc 51 on the side where the strain force occurs tends to rotate downward. When this force is applied, it will drive the connecting plate 576 at that point to move towards the axis of the connecting shaft 54, thereby forcing the convex sliding plate 573 connected to it to tend to slide inward. Thus, through the synchronous moving member 574, a pulling force is exerted on the connecting plate 576 on the other side. This force will pull the position on the symmetrical side that tends to rotate upward, thereby achieving the effect of the strain force canceling out on the support disc 51 and the foundation pile 53, and self-cancelling the compressive strain force caused by the weight of the car, thereby achieving a better balance effect. In this way, the stability performance of the precast slab layer 4 is improved through the support unit 5.

[0064] Meanwhile, the subgrade layer 2 is a 30cm thick layer of waste brick debris material used as the subgrade layer for temporary prefabricated roads. It is compacted and leveled layer by layer and laid on soft soil areas. By selecting the material of the subgrade layer 2, the cost of paving materials can be reduced and waste materials can be reused.

[0065] Finally, the sand cushion layer 3 is composed of fine sand and gravel mixed together and laid in a 10cm thick sand cushion layer 3. The laying of the sand cushion layer 3 can improve the flexibility of the base surface. At the same time, the base surface composed of the base soil layer 2 and the sand cushion layer 3 can reduce the occurrence of the bottom of the precast slab layer 4 being suspended and broken after being crushed by heavy vehicles in the later use, so as to provide good temporary support conditions.

[0066] Installation steps:

[0067] First, perform preliminary cleaning of the surface of soft soil layer 1 to ensure that its surface is free of debris;

[0068] 2. Laying the foundation soil layer 2, and reserving pits for embedding foundation piles 53 in the foundation soil layer 2, and installing various components on the foundation piles 53 to form a support unit 5. At the same time, the positioning center for the installation of each precast slab can be formed through the support unit 5.

[0069] 3. After compacting the foundation soil layer 2, the sand cushion layer 3 is laid, and the support disc 51 is exposed to the surface of the sand cushion layer 3 to form the positioning center for the installation of the precast slab.

[0070] Fourth, insert the disc groove 52 on the precast slab into the support disc 51 to achieve the installation and docking of the precast slab.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A support mechanism for the installation of precast concrete slabs, comprising a soft soil layer (1), characterized in that... The soft soil layer (1) is laid with a base soil layer (2), a sand cushion layer (3) and a precast slab layer (4) from bottom to top. The precast slab layer (4) is formed by multiple precast slabs connected to each other and laid in rows; and Support units (5) are provided on the precast slab layer (4), the base soil layer (2) and the sand cushion layer (3) to balance the compressive force formed by the uneven force caused by gravity on the precast slab layer (4) during vehicle operation. The support unit (5) includes: Multiple support discs (51) are disposed on the inner surface of the precast slab, and the precast slab is provided with disc grooves (52) for placing the support discs (51). The foundation pile (53) and the supporting disc (51) are coaxially arranged and embedded in the foundation soil layer (2); The connecting shaft (54) is spherically hinged to the supporting disk (51) at one end and fixed to the center of the foundation pile (53) at the other end. A balancing component (55) is disposed between the foundation pile (53) and the support disk (51) to balance the strain force on the support disk (51); The balancing component (55) includes: Multiple sets of elastic tension members (56) are arranged in an array and tilted on the foundation pile (53); Multiple sets of pressure balancing components (57) are evenly spirally arranged on the connecting shaft (54) from top to bottom, and are staggered with multiple sets of elastic tension components (56) to achieve a better balance effect; The elastic tension member (56) includes: The tie rod (561) is fixedly installed on the side wall of the foundation pile (53). It is hollow inside, and a slider (562) is slidably installed in the hollow position. The slider (562) is connected to the tie rope (563), and the other end of the tie rope (563) is fixed to the outer wall of the support disc (51) near the outer edge. A traction spring (564) is fitted onto the traction rope located between the hollow positions of the slider (562) and the pull rod (561); The pressure-balancing component (57) includes: A folded pressure frame (571) is fixedly mounted on a connecting shaft (54); Two sets of sliding grooves (572) are symmetrically arranged at the upper and lower ends of the folded shape of the pressure frame (571); Two sets of convex sliding plates (573) slide in the sliding groove (572) respectively, and a synchronous moving part (574) is provided between the two sets of convex sliding plates (573). Two sets of sleeve shafts (575) are respectively fixed to the far ends of two sets of convex sliding plates (573); A connecting plate (576) is rotatably connected to a sleeve shaft (575) at one end and rotatably connected to a support disc (51) near the outer edge at the other end. The synchronous moving component (574) includes a toothed groove (5741) disposed on the surfaces of the two sets of convex sliding plates (573) that are close to each other. A gear (5742) is rotatably disposed on the pressing frame (571) located at the symmetrical center of the two sets of convex sliding plates (573). The gear (5742) and the toothed groove (5741) are meshed together.

2. The precast concrete slab pavement for soft soil areas according to claim 1, characterized in that, The subgrade layer (2) is a 30cm thick layer of waste brick slag material used as the subgrade layer (2) for temporary prefabricated roads. It is compacted and leveled layer by layer and laid on the soft soil area.

3. The precast concrete slab pavement for soft soil areas according to claim 1, characterized in that, The sand cushion layer (3) is composed of fine sand and gravel mixed together and laid in a 10cm thick sand cushion layer (3).

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