Sandy gravel stratum pile casing construction device
By using guide wheel assemblies and articulated arm structures during the casing lowering process, the problem of unstable casing lowering in gravel strata was solved, achieving stable and precise casing lowering and improving construction efficiency.
Patent Information
- Application Number
- CN202520299501.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-25
AI Technical Summary
When constructing casings in sandy and gravelly strata, the casings are prone to shaking and impacting the borehole walls, causing soil to peel off. They are also unstable when lowered and difficult to position accurately, affecting the stability of the pile hole and construction efficiency.
The casing lowering guide wheel mechanism includes upper and lower layered guide wheel assemblies and articulated arm structures. Through the guidance of the guide wheel assemblies and the adjustment of the articulated arms, the stability and accuracy of the casing are ensured during the lowering process.
This ensured the smooth lowering of the casing, preventing soil spalling and jamming, improving the stability and precision of the construction, and ensuring that the casing could reach the bottom of the hole smoothly.
Smart Images
Figure CN223867252U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the sand pebble stratum casing construction technical field especially relates to a sand pebble stratum casing construction device. BACKGROUND
[0002] The sand pebble stratum is a kind of soil layer structure with more sand and pebble, which is different from conventional soil layer structure, and the soil of sand pebble stratum is more loose, and the specific reason is that the amount of sand and pebble is too much, which leads to the low viscosity and tightness of soil layer structure.
[0003] During construction, especially during pile foundation construction, the construction personnel need to hoist the reinforcement cage framework for pouring pile foundation into the pile hole after drilling a certain depth of pile hole in the sand and pebble.During construction, the pile hole of sand pebble stratum with large depth is easy to collapse during construction, which leads to the filling of pile hole and the incomplete hoisting of reinforcement cage framework to the bottom of hole.
[0004] Therefore, in the prior art, the casing corresponding to the length of pile hole is pre-placed into the pile hole to support the pile hole.In order to ensure that the casing can be smoothly lowered, a safe gap is required between the casing and the hole wall of pile hole.
[0005] However, since the casing is lowered into the pile hole by crane and wire rope, the casing is easy to shake and hit the hole wall of pile hole again during wire rope hoisting, which leads to the easy peeling of hole wall soil with loose soil layer structure and falling into the bottom of hole, or the peeling of goose pebble and being stuck between hole wall and casing, which leads to the large resistance of casing lowering, and when the amount of peeling soil layer is large at the bottom of hole, the casing and subsequent reinforcement cage cannot be completely lowered to the bottom of hole.
[0006] At the same time, since the casing with large wire rope suspension length is easy to shake, the construction personnel need to support the casing to avoid violent shaking during lowering, but the heavy casing is difficult to accurately correct its posture during lowering to ensure its smooth lowering. INVENTION CONTENTS
[0007] Based on the above background, the utility model aims to provide a sand pebble stratum casing construction device.
[0008] To achieve the above purpose, the utility model adopts the following technical solutions:
[0009] A sand pebble stratum casing construction device, comprising a casing lowering guide wheel mechanism;
[0010] The lowering guide wheel mechanism of the protective cylinder includes several guide wheel assemblies arranged in upper and lower layers. Each guide wheel assembly includes an annular base, and several guide wheel components are assembled and connected to the top of the annular base. Each guide wheel component includes a fixed arm mounted on the annular base. The fixed arm is hinged to a first hinge arm, and the first hinge arm is hinged to a second hinge arm. The outer end of the second hinge arm is rotatably connected to a guide wheel.
[0011] The fixed arm is locked to the first hinge arm by a first locking structure, and the fixed arm is locked to the second hinge arm by a second locking structure.
[0012] After the first hinge arm and the second hinge arm are adjusted by hinge, the first hinge arm and the second hinge arm are locked and fixed by the first locking structure and the second locking structure.
[0013] During the lowering of the casing, the casing is lowered by the guide rollers.
[0014] Preferably, the first locking structure includes a first rectangular adjustment port formed on the first hinge arm, and an inclined screw is fixedly connected to the outer end of the fixed arm, the inclined screw passing through the first rectangular adjustment port;
[0015] The inclined screw is threaded with a pair of first support nuts positioned on both sides of the first rectangular adjustment port.
[0016] Preferably, the second locking structure includes a second rectangular adjustment port formed on the second hinge arm;
[0017] The top of the inner end of the fixed arm is fixedly connected to a vertical screw that penetrates the second rectangular adjustment port.
[0018] The vertical screw is threaded with a pair of second support nuts positioned on both sides of the second rectangular adjustment port.
[0019] Preferably, the upper and lower ends of the first hinge arm are respectively provided with hinge interfaces, and the outer end of the fixed arm is hinged to the hinge interface by a pin and screw.
[0020] The inner end of the second hinge arm is hinged to the hinge interface by a pin and screw.
[0021] Both ends of the pin screw are threaded with compression positioning nuts.
[0022] Preferably, the annular base and the fixed arm are slidably connected; the annular base has a groove for limiting the sliding fixed arm.
[0023] The annular base is equipped with several pushing structures, each used to push the fixed arm.
[0024] Preferably, the pushing structure includes a pushing screw threaded onto an annular base, the inner end of which abuts against a fixed arm.
[0025] Preferably, the lowering guide wheel mechanism for the protective cylinder includes two guide wheel assemblies arranged in upper and lower layers;
[0026] The guide wheel assembly is connected by several height adjustment structures.
[0027] Preferably, the height adjustment structure includes adjustment rods that are fixedly connected to the annular base and face each other toward the sidewalls;
[0028] A sleeve is slidably fitted between the adjusting rods;
[0029] The upper and lower ends of the sleeve are respectively threaded with several bolts that abut against the adjusting rod.
[0030] Preferably, the guide wheels are arranged in a circular array on the annular base.
[0031] This utility model has the following beneficial effects:
[0032] 1. During the casing lowering process, guided by several guide wheels distributed circumferentially and in upper and lower layers, the casing is lowered smoothly, and the contact mechanism ensures that the casing is not easily misaligned or shaken. This method increases the stability of the pile foundation hole during casing lowering and solves the defects of casing shaking and impacting the hole wall during hoisting and lowering, which easily causes sand and soil from the hole wall to peel off and accumulate at the bottom of the hole, and the peeled sand and gravel to jam the casing.
[0033] 2. By cooperating with the first hinge arm, the second hinge arm, the first locking structure, and the second locking structure, the posture of the first hinge arm and the second hinge arm can be adjusted to ensure that the guide wheel can fully, tightly, and accurately contact the protective cylinder, thus maintaining the stability of the protective cylinder during lowering.
[0034] 3. By using a push structure to achieve push adjustment, it is further ensured that the guide wheel can closely contact the casing. Attached Figure Description
[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0036] Figure 1 This is a schematic diagram of the guide wheel mechanism for lowering the protective cylinder in an embodiment of the present invention.
[0037] Figure 2 This is a schematic diagram of the overall structure in an embodiment of the present utility model;
[0038] Figure 3 This is a schematic diagram of the guide wheel assembly in an embodiment of the present invention;
[0039] Figure 4 This is a schematic diagram of the first locking structure and the second locking structure in the embodiments of this utility model;
[0040] Figure 5 This is an embodiment of the present utility model. Figure 2 The front view in the image.
[0041] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0044] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0045] Example 1
[0046] like Figures 1-5As shown, a casing construction device for sand and gravel strata includes a casing lowering guide wheel mechanism. The casing lowering guide wheel mechanism includes two guide wheel assemblies 2 arranged in upper and lower layers. During the process of lowering the long casing 1 to the pile hole, the guide wheel assemblies 2 guide the casing to avoid violent shaking of the suspended casing and ensure that the casing is lowered vertically. In addition, the casing 1 is less likely to hit the pile hole wall during the lowering process, which would cause the soil, sand, gravel and pebbles to peel off.
[0047] Specifically, the guide wheel assembly 2 includes an annular base 21 (during operation, the annular base 21 located at the bottom is anchored around the pile hole in the existing manner to keep the annular base 21 concentric with the pile hole for convenient and accurate guidance of the casing). The top of the annular base 21 is equipped with a number of guide wheel components 22 arranged in an annular array. The guide wheel component 22 includes a fixed arm 221 mounted on the annular base 21. The fixed arm 221 is hinged to a first hinge arm 222, and the first hinge arm 222 is hinged to a second hinge arm 223.
[0048] The hinge method is as follows: the upper and lower ends of the first hinge arm 222 are respectively provided with hinge interfaces, and the outer end of the fixed arm 221 is hinged to the hinge interface by a pin and screw; the inner end of the second hinge arm 223 is hinged to the hinge interface by a pin and screw; and the two ends of the pin and screw are respectively threaded with compression positioning nuts.
[0049] After the first hinge arm 222 and the second hinge arm 223 are flipped and adjusted, the clamping positioning nut is pressed onto the hinge arm to achieve proper positioning of the hinge arm.
[0050] Meanwhile, the outer end of the second hinged arm 223 is rotatably connected to a guide wheel 224. During the lowering of the casing, guided by several guide wheels 224 distributed circumferentially and layered vertically, the casing is lowered smoothly, and the contact mechanism ensures that the casing 1 is not prone to deviation or shaking. This method increases the stability of the casing 1 when lowering into the pile hole, solving the defects of the casing 1 shaking and impacting the hole wall during hoisting and lowering, which easily causes sand and soil from the hole wall to peel off and accumulate at the bottom of the hole, and the peeled sand and gravel to jam the casing 1.
[0051] Example 2
[0052] like Figures 1-5 As shown, in this embodiment, based on the structure of Embodiment 1, the fixed arm 221 is locked to the first hinge arm 222 by a first locking structure, and the fixed arm 221 is locked to the second hinge arm 223 by a second locking structure. After adjusting the hinge of the first hinge arm 222 and the second hinge arm 223, the first hinge arm 222 and the second hinge arm 223 are locked and fixed by the first locking structure and the second locking structure. Adjusting the hinge of the first hinge arm 222 and the second hinge arm 223 ensures that the guide wheel 224 can accurately and tightly abut against the casing wall.
[0053] Specifically, the first locking structure includes a first rectangular adjustment port on the first hinge arm 222, and an inclined screw 225 fixedly connected to the outer end of the fixed arm 221, the inclined screw 225 passing through the first rectangular adjustment port A; a pair of first support nuts 2251 positioned on both sides of the first rectangular adjustment port A are threaded onto the inclined screw 225. The second locking structure includes a second rectangular adjustment port B on the second hinge arm 223; a vertical screw 226 perpendicularly passing through the second rectangular adjustment port B is fixedly connected to the top of the inner end of the fixed arm 221; a pair of second support nuts 2261 positioned on both sides of the second rectangular adjustment port B are threaded onto the vertical screw 226.
[0054] During the adjustment process, the operator loosens the first support nut 2251 to flip and adjust the angle of the first hinge arm 222. After the angle of the first hinge arm 222 is adjusted, the first support nut 2251 is repositioned on both sides of the first rectangular adjustment port A (the first support nut 2251 only needs to be supported on the first hinge arm 222 to be positioned).
[0055] Similarly, if the contact wheel still cannot make precise and effective contact after the angle of the first hinge arm 222 is adjusted, the second hinge arm 223 can be adjusted in the same way as the first hinge arm 222. During the adjustment process, the vertical screw 226 and the inclined screw 225 slide relative to each other in the corresponding rectangular adjustment ports.
[0056] Example 3
[0057] like Figures 1-5 As shown, in this embodiment, based on the structure of embodiment 2, the annular base 21 and the fixed arm 221 are slidably connected; a groove 211 for limiting the sliding fixed arm 221 is provided on the annular base 21.
[0058] Meanwhile, the annular base 21 is equipped with several pushing structures for pushing the fixed arm 221. The pushing structure includes a pushing screw 212 threadedly connected to the annular base 21, and the inner end of the pushing screw 212 abuts against the fixed arm 221.
[0059] During operation, when the push screw 212 is turned inward, the push screw 212 squeezes and pushes the fixed arm 221 to slide in the slide groove 211 and move towards the protective cylinder 1. At this time, the guide wheel 22 moves inward and abuts against the protective cylinder 1 to increase the tightness of the protective cylinder 1.
[0060] Example 4
[0061] like Figures 1-5As shown, in this embodiment, based on the structure of embodiment 3, the guide wheel assembly 2 is connected by several height adjustment structures 3. The height adjustment structures 3 are used to adjust the spacing between the upper and lower guide wheel assemblies 2, ensuring that they can fully contact the guide sleeve 1.
[0062] Specifically, similar to existing height adjustment methods, the height adjustment structure 3 includes adjustment rods that are fixedly connected to the annular base 21 and face each other on the side walls; a sleeve is slidably fitted between the adjustment rods; and several bolts that abut against the adjustment rods are threaded to the upper and lower ends of the sleeve.
[0063] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.
Claims
1. A casing construction device for sand and gravel strata, characterized in that, Including the casing lowering guide wheel mechanism; The lowering guide wheel mechanism of the protective cylinder includes several guide wheel assemblies arranged in upper and lower layers. Each guide wheel assembly includes an annular base, and several guide wheel components are assembled and connected to the top of the annular base. Each guide wheel component includes a fixed arm mounted on the annular base. The fixed arm is hinged to a first hinge arm, and the first hinge arm is hinged to a second hinge arm. The outer end of the second hinge arm is rotatably connected to a guide wheel. The fixed arm is locked to the first hinge arm by a first locking structure, and the fixed arm is locked to the second hinge arm by a second locking structure. After the first hinge arm and the second hinge arm are adjusted by hinge, the first hinge arm and the second hinge arm are locked and fixed by the first locking structure and the second locking structure. During the lowering of the casing, the casing is lowered by the guide rollers.
2. The casing construction device for gravel strata according to claim 1, characterized in that, The first locking structure includes a first rectangular adjustment port formed on the first hinge arm, and an inclined screw is fixedly connected to the outer end of the fixed arm, the inclined screw passing through the first rectangular adjustment port; The inclined screw is threaded with a pair of first support nuts positioned on both sides of the first rectangular adjustment port.
3. The casing construction device for gravel strata according to claim 1, characterized in that, The second locking structure includes a second rectangular adjustment port formed on the second hinge arm; The top of the inner end of the fixed arm is fixedly connected to a vertical screw that penetrates the second rectangular adjustment port. The vertical screw is threaded with a pair of second support nuts positioned on both sides of the second rectangular adjustment port.
4. The casing construction device for gravel strata according to claim 1, characterized in that, The first hinge arm has hinge interfaces at its upper and lower ends respectively, and the outer end of the fixed arm is hinged to the hinge interface by a pin and screw. The inner end of the second hinge arm is hinged to the hinge interface by a pin and screw. Both ends of the pin screw are threaded with compression positioning nuts.
5. The casing construction device for gravel strata according to claim 1, characterized in that, The annular base and the fixed arm are slidably connected; a groove for limiting the sliding fixed arm is provided on the annular base; The annular base is equipped with several pushing structures, each used to push the fixed arm.
6. The casing construction device for gravel strata according to claim 5, characterized in that, The pushing structure includes a pushing screw threaded onto an annular base, the inner end of which abuts against a fixed arm.
7. The casing construction device for gravel strata according to claim 1, characterized in that, The lowering guide wheel mechanism for the protective sleeve includes two guide wheel assemblies arranged in upper and lower layers; The guide wheel assembly is connected by several height adjustment structures.
8. The casing construction device for gravel strata according to claim 7, characterized in that, The height adjustment structure includes adjustment rods that are fixedly connected to the annular base and face each other on the side walls. A sleeve is slidably fitted between the adjusting rods; The upper and lower ends of the sleeve are respectively threaded with several bolts that abut against the adjusting rod.
9. The casing construction device for gravel strata according to claim 1, characterized in that, The guide wheels are arranged in a circular array on the annular base.