Cast-in-place pile structure for river construction

Abstract

The utility model discloses a cast-in-place pile structure for river channel construction. The cast-in-place pile structure comprises a cast-in-place pile reinforcement cage mechanism and an anti-floating pile casing mechanism installed at the upper end of the cast-in-place pile reinforcement cage mechanism. The anti-floating pile casing mechanism comprises a pile casing, a plurality of anti-floating assemblies are detachably assembled and connected to the pile casing, each anti-floating assembly comprises a U-shaped base, and the U-shaped bases are detachably installed on the pile casing; the cast-in-place pile reinforcement cage mechanism is limited in a U-shaped opening of the U-shaped base, a plurality of screws are fixedly connected to the top of the U-shaped base, anti-floating pressing plates are slidably connected between the screws, and the anti-floating pressing plates press the top of the cast-in-place pile reinforcement cage mechanism in a contact mode; the screw rod is in threaded connection with a nut for positioning the anti-floating pressing plate; an anchoring mechanism is assembled and connected to the outer side wall of the pile casing. According to the device, the reinforcement cage can be effectively prevented from floating upwards, and then the position below the reinforcement cage is prevented from being empty. And meanwhile, the reinforcement cage is prevented from being inclined easily in a touch pressing mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of cast-in-place piles, and particularly relates to a cast-in-place pile structure for river channel construction. Background Technique

[0002] The construction of cast-in-place piles is an important project in the field of river channel construction. Specifically, by pouring cast-in-place piles in the river channel, pile columns such as bridge columns of bridges can be installed in the river channel.

[0003] In the construction of cast-in-place piles, concrete is grouted in a multi-grouting concrete method. Specifically, during the construction process, first, a casing is installed at the construction position to prevent landslides. Subsequently, after using tools such as a drill bit to drill a pouring cavity below the casing, the steel cage of the cast-in-place pile is hoisted into the pouring cavity, and concrete is poured to form the pile foundation of the cast-in-place pile. Specifically, the concrete is poured into the funnel by using a conduit and a funnel, and the concrete enters the pouring cavity from the conduit and is poured to form a cast-in-place pile.

[0004] However, due to the large seal of the concrete, during the process of pouring concrete, the steel cage is affected by the buoyancy of the concrete slurry, and the steel cage is prone to floating during the process of pouring concrete. As a result, a void position is formed between its bottom and the bottom of the pouring cavity. In severe cases of floating, the void is deeper. After grouting the concrete, the stability of the concrete layer in the void position is greatly reduced because it is not supported by the steel reinforcement cage.

[0005] Subsequently, the cast-in-place pile needs to bear the load, such as the weight of the bridge body. If the bottom of the cast-in-place pile is not effectively reinforced by the steel reinforcement cage, the strength is poor. After subsequent construction, the cast-in-place pile cannot withstand high loads, resulting in very poor stability of building structures such as bridge bodies.

[0006] During the construction process, it is also difficult for the steel reinforcement cage to be pressed down during the floating process. Specifically, the buoyancy force of the grouted concrete on the steel reinforcement cage is too large, and it is difficult to keep the steel reinforcement cage in a fixed position. Content of the Utility Model

[0007] Based on the above background, the purpose of the utility model is to provide a cast-in-place pile structure for river channel construction.

[0008] To achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A cast-in-place pile structure for river channel construction includes a cast-in-place pile steel reinforcement cage mechanism and an anti-floating casing mechanism installed at the upper end of the cast-in-place pile steel reinforcement cage mechanism;

[0010] The anti-floating casing mechanism is used to prevent the cast-in-place pile steel reinforcement cage mechanism from floating during the process of pouring concrete;

[0011] The anti-floating casing mechanism includes a casing, and a number of anti-floating components are detachably assembled and connected to the casing. The anti-floating component includes a U-shaped base, and the U-shaped base is detachably installed on the casing; the cast-in-place pile steel cage mechanism is limited within the U-shaped opening of the U-shaped base;

[0012] A number of screw rods are fixedly connected to the top of the U-shaped base, and an anti-floating pressing plate is slidably connected between the screw rods. The anti-floating pressing plate touches and presses on the top of the cast-in-place pile steel cage mechanism;

[0013] A nut for positioning the anti-floating pressing plate is threadedly connected to the screw rod;

[0014] An anchoring mechanism is assembled and connected to the outer side wall of the casing.

[0015] Preferably, an installation screw rod is threadedly connected to the casing, a cylindrical convex seat is fixedly connected to the inner side wall of the U-shaped base, and the installation screw rod is threadedly connected to the cylindrical convex seat.

[0016] Preferably, the anchoring mechanism includes an annular top seat detachably installed on the outer side wall of the casing, and a number of annular anchoring plates are fixedly connected to the bottom of the annular top seat;

[0017] A number of anchor nails are welded to the inner and outer side walls of the annular anchoring plate.

[0018] Preferably, the shape of the anchor nail is cylindrical;

[0019] The length of the anchor nail is 2-5 cm.

[0020] Preferably, two annular anchoring plates arranged at intervals up and down are assembled and connected to the bottom of the annular top seat;

[0021] The annular anchoring plates are connected by a number of fasteners.

[0022] Preferably, the fastener includes a central screw tube, and connecting screw rods for fastening on the annular anchoring plate are respectively threadedly connected to the upper and lower ends of the central screw tube.

[0023] Preferably, the cast-in-place pile steel cage mechanism includes a number of longitudinals distributed in a ring;

[0024] A number of stirrup members arranged at intervals up and down are fixedly connected between the longitudinals.

[0025] Preferably, the stirrup member includes an outer stirrup fixedly connected between the outsides of the longitudinals and an inner stirrup fixedly connected between the insides of the longitudinals;

[0026] The stirrup member further includes a support frame fixedly connected between the bottoms of the outer stirrup and the inner stirrup.

[0027] Preferably, the cross-sectional shape of the support frame is cruciform, and an arc-shaped opening is formed at the bottom of the support frame. The bottoms of the outer stirrup and the inner stirrup are limited within the arc-shaped opening.

[0028] The utility model has the following beneficial effects:

[0029] 1. During the working process, after the steel reinforcement cage is placed, at this time, the U-shaped base is clamped onto the longitudinal bars of the steel reinforcement cage, and the installation screw is fastened from the outer side wall of the casing to be threadedly connected to the cylindrical convex seat. Then, the anti-floating pressure plate is pressed against the top of the longitudinal bars of the steel reinforcement cage, and the upper nut is tightened.

[0030] The length of the screw is set corresponding to the height of the longitudinal bars of the steel reinforcement cage to ensure that the anti-floating pressure plate can press against the top of the longitudinal bars of the steel reinforcement cage. Through the above method, during the concrete pouring process, due to the pressing of the anti-floating pressure plate, it can effectively prevent the steel reinforcement cage from floating, thereby avoiding the void under the steel reinforcement cage. At the same time, in the pressing mode, it can prevent the steel reinforcement cage from being prone to tilt.

[0031] 2. During the working process, a plurality of anchor studs are welded on the inner and outer side walls of the annular anchor plate. The shape of the anchor stud is cylindrical; during the construction process, when the casing is buried, the annular anchor plate - anchor stud structure is also buried in the soil layer. Due to the anchoring of the anchor studs, the stability of the casing is increased. Specifically, through the grip strength of multiple anchor studs with the soil layer, the stability of the casing is improved. Especially for the casing with a shorter length, through the anchoring effect, the stability is greatly improved, avoiding the instability of the casing during construction, which may lead to the instability of the steel reinforcement cage fixed on the casing.

[0032] 3. The stirrup member includes an outer stirrup fixedly connected between the outer sides of the longitudinal bars and an inner stirrup fixedly connected between the inner sides of the longitudinal bars; the stirrup member further includes a cruciform support frame fixedly connected between the bottoms of the outer stirrup and the inner stirrup. The stability of the support for the cast-in-place pile steel reinforcement cage by the stirrup member is improved through the support frame. Specifically, the deformation of the cast-in-place pile steel reinforcement cage is avoided through the support of the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0034] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present utility model;

[0035] Figure 2Schematic structural diagram of the anti-floating pressing plate in the embodiment of the present utility model;

[0036] Figure 3 Schematic structural diagram of the support frame in the embodiment of the present utility model;

[0037] Figure 4 Schematic structural diagram of the annular anchoring plate and the anchor bolts in the embodiment of the present utility model;

[0038] Figure 5 In the embodiment of the present utility model Figure 1 Top view.

[0039] In the figure: 11 longitudinal bars, 12 outer stirrups, 13 inner stirrups, 14 support frame, 141 arc-shaped opening, 21 annular top seat, 22 anchor bolts, 23 annular anchoring plate, 24 fasteners, 25 protection cylinder, 31 U-shaped base, 311 cylindrical convex seat, 32 screw rod, 321 nut, 33 anti-floating pressing plate, 34 installation screw rod. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, the descriptions such as "first" and "second" in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0043] Embodiment 1

[0044] As Figures 1-5As shown in the figure, a cast-in-place pile structure for river channel construction includes a cast-in-place pile steel reinforcement cage mechanism and an anti-floating casing mechanism installed at the upper end of the cast-in-place pile steel reinforcement cage mechanism.

[0045] The anti-floating casing mechanism is used as the casing for the cast-in-place pile during pouring. Secondly, it can prevent the steel reinforcement cage from floating during the pouring process. Thirdly, it is convenient to separate from the steel reinforcement cage after pouring, facilitating the extraction of the casing.

[0046] Specifically, the anti-floating casing mechanism includes a casing 25, and a number of anti-floating components are detachably assembled and connected to the casing 25. The anti-floating component includes a U-shaped base 31, and the U-shaped base 31 is detachably installed on the casing 25. The specific method is as follows: an installation screw 34 is threadedly connected to the casing 25, and a cylindrical convex seat 311 is fixedly connected to the inner side wall of the U-shaped base 31, and the installation screw 34 is threadedly connected to the cylindrical convex seat 311.

[0047] The disassembly and assembly are achieved by threading the installation screw 34 onto the cylindrical convex seat 311.

[0048] The above cast-in-place pile steel reinforcement cage mechanism is limited within the U-shaped opening of the U-shaped base 31; specifically, the longitudinal bars of the cast-in-place pile steel reinforcement cage mechanism are limited within the U-shaped opening.

[0049] Two spaced screws 32 are fixedly connected to the top of the above U-shaped base 31. An anti-floating pressure plate 33 is slidably connected between the screws 32, and the anti-floating pressure plate 33 touches the top of the cast-in-place pile steel reinforcement cage mechanism (longitudinal bars); a nut 321 for positioning the anti-floating pressure plate 33 is threadedly connected to the screw 32.

[0050] During the working process, when the steel reinforcement cage is placed, at this time, the U-shaped base 31 is clamped onto the longitudinal bars of the steel reinforcement cage, and the installation screw 34 is tightened from the outer side wall of the casing 25 to be threadedly connected to the cylindrical convex seat 311. Then, the anti-floating pressure plate 33 is touched onto the top of the longitudinal bars 11 of the steel reinforcement cage, and the nut 321 is tightened.

[0051] The length of the screw 32 is correspondingly set according to the height of the longitudinal bars of the steel reinforcement cage to ensure that the anti-floating pressure plate 33 can touch the top of the longitudinal bars of the steel reinforcement cage.

[0052] Through the above method, during the process of pouring concrete, due to the touch of the anti-floating pressure plate 33, it can effectively prevent the steel reinforcement cage from floating, thereby avoiding the existence of voids below the steel reinforcement cage. At the same time, in the touch mode, it can prevent the steel reinforcement cage from being easily inclined.

[0053] After construction, the above anti-floating components are disassembled and removed.

[0054] Embodiment 2

[0055] As Figures 1-5As shown in the figure, in this embodiment, on the basis of the structure of Embodiment 1, an anchoring mechanism is assembled and connected to the outer side wall of the casing 25. The stability of the casing 25 is strengthened through the anchoring mechanism, avoiding the instability of the casing 25 caused by excessive buoyancy of the steel reinforcement cage, which may further lead to the floating and tilting instability of the steel reinforcement cage during the grouting process.

[0056] Specifically, the anchoring mechanism includes an annular top seat 21 detachably installed on the outer side wall of the casing 25 (the annular top seat 21 is of an annular structure and is concentric with the casing 25. Specifically, the detachable connection is achieved by screwing the fastening bolts threaded on the annular top seat 21 to the casing 25). Two annular anchoring plates 23 arranged one above the other are fixedly connected to the bottom of the annular top seat 21. The annular anchoring plate 23 at the upper end is welded to the bottom of the annular top seat 21, and the annular anchoring plate 23 at the lower end is connected by a plurality of fasteners 24. Specifically, the fastener 24 includes a central screw tube, and connecting screws fastened to the annular anchoring plate 23 are respectively threaded at the upper and lower ends of the central screw tube. After the connecting screws disassemble the central screw tube, the annular anchoring plate 23 at the lower end position can be removed. This enables the selection of either a single annular anchoring plate 23 or a double-layer annular anchoring plate 23 according to needs during the construction process.

[0057] A number of anchor studs 22 are welded on the inner and outer side walls of the above-mentioned annular anchoring plate 23. The shape of the anchor stud 22 is cylindrical; the length of the anchor stud 22 is 2.8 cm. During the construction process, when the casing 25 is being buried, the annular anchoring plate 23 - anchor stud 22 structure is also buried in the soil layer. Due to the anchoring of the anchor studs 22, the stability of the casing 25 is increased. Specifically, the stability of the casing 25 is improved through the gripping force between multiple anchor studs 22 and the soil layer. Especially for a casing 25 with a relatively short length, the stability is greatly improved through the anchoring effect, avoiding the instability of the casing 25 and the steel reinforcement cage fixed on the casing 25 during construction.

[0058] Embodiment 3

[0059] As Figures 1-5 shown, in this embodiment, on the basis of the structure of Embodiment 2, the cast-in-place pile steel reinforcement cage mechanism includes a number of longitudinals 11 distributed annularly. At the same time, a number of stirrup members are fixedly connected between the longitudinals 11 at intervals up and down.

[0060] Specifically, the stirrup members include outer stirrups 12 fixedly connected between the outer sides of the longitudinals 11 and inner stirrups 13 fixedly connected between the inner sides of the longitudinals 11; the stirrup members also include a support frame 14 fixedly connected between the bottoms of the outer stirrups 12 and the inner stirrups 13. The support stability of the stirrup members for the cast-in-place pile steel reinforcement cage is improved by means of the support frame 14. Specifically, the deformation of the cast-in-place pile steel reinforcement cage is avoided through the support of the support frame 14.

[0061] The cross-sectional shape of the support frame 14 is cruciform, and an arc-shaped opening 141 is formed at the bottom of the support frame 14. The bottoms of the outer stirrup 12 and the inner stirrup 13 are limited within the arc-shaped opening 141. By welding, the outer stirrup 12 and the inner stirrup 13 are stably fixed by the support frame 14, thereby greatly improving the stability of the entire steel reinforcement cage and avoiding formation.

[0062] Certainly, the above description is not a limitation to the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A cast-in-place pile structure for river channel construction, characterized in that: It includes a cast-in-place pile reinforcement cage mechanism and an anti-floating casing mechanism installed at the upper end of the cast-in-place pile reinforcement cage mechanism; The anti-floating casing mechanism is used to prevent the cast-in-place pile reinforcement cage from floating during the concrete pouring process; The anti-floating casing mechanism comprises a casing, on which a plurality of anti-floating components are detachably assembled and connected, and the anti-floating components comprise a U-shaped base, which is detachably mounted on the casing; the cast-in-place pile reinforcement cage mechanism is limited in a U-shaped opening of the U-shaped base; A plurality of screw rods are fixedly connected to the top of the U-shaped base, and an anti-floating pressure plate is slidably connected between the screw rods, and the anti-floating pressure plate contacts and presses on the top of the cast-in-place pile reinforcement cage mechanism; The screw rod is threadedly connected with a nut for positioning the anti-floating pressure plate; An anchoring mechanism is assembled and connected on the outer side wall of the casing.

2. The cast-in-place pile structure for river channel construction according to claim 1, characterized in that: The casing is threadedly connected with a mounting screw rod, the inner side wall of the U-shaped base is fixedly connected with a cylindrical boss, and the mounting screw rod is threadedly connected to the cylindrical boss.

3. The cast-in-place pile structure for river channel construction according to claim 1, characterized in that: The anchoring mechanism comprises an annular top seat detachably mounted on the outer side wall of the casing, and a plurality of annular anchoring plates are fixedly connected to the bottom of the annular top seat; A plurality of anchor nails are welded on the inner and outer side walls of the annular anchor plate.

4. The cast-in-place pile structure for river channel construction according to claim 3, characterized in that: The shape of the anchor is cylindrical; The length of the anchor is 2-5 cm.

5. The cast-in-place pile structure for river channel construction according to claim 3, characterized in that: The bottom of the annular top seat is connected to two annular anchoring plates spaced apart from each other. The annular anchoring plates are connected by a plurality of fasteners.

6. The cast-in-place pile structure for river channel construction according to claim 5, characterized in that: The fastener comprises a central spiral tube, and the upper and lower ends of the central spiral tube are respectively threadedly connected with connecting screws fastened to the annular anchor plate.

7. The cast-in-place pile structure for river channel construction according to claim 1, characterized in that: The cast-in-place pile reinforcement cage mechanism includes a plurality of longitudinal reinforcements distributed in an annular manner; A plurality of stirrups arranged at intervals up and down are fixedly connected between the longitudinal ribs.

8. The cast-in-place pile structure for river channel construction according to claim 7, characterized in that: The stirrups include outer stirrups fixedly connected between the outer sides of the longitudinal ribs and inner stirrups fixedly connected between the inner sides of the longitudinal ribs; The stirrup member also includes a support frame fixedly connected between the outer stirrup and the bottom of the inner stirrup.

9. The cast-in-place pile structure for river channel construction according to claim 8, characterized in that: The cross-sectional shape of the support frame is a cross, an arc-shaped opening is opened at the bottom of the support frame, and the bottoms of the outer stirrups and the inner stirrups are limited in the arc-shaped opening.

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