All-bamboo sleeve
By adopting the full bamboo sleeve design of "large bamboo tube sleeve small bamboo tube" and using friction matching to connect two original bamboo tubes, the problem of insufficient strength and stability of round bamboo in construction and water conservancy infrastructure is solved, and the effect of high strength and pure green environmental protection is achieved.
Patent Information
- Application Number
- CN202421497275.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-27
AI Technical Summary
In the prior art, when used in construction and water conservancy infrastructure, due to its low strength, volatile instability and large deformation, it is difficult to meet the needs of strength and stability, and traditional reinforcement methods cannot meet the requirements of pure green and environmental protection.
The first and second bamboo tubes of the same length are adopted. The second bamboo tube sleeve is arranged outside the first bamboo tube. The inner walls and outer walls of the two are connected by frictional cooperation to form a full bamboo sleeve. The design relies on the "large bamboo tube sleeve and small bamboo tube" model, and connects through friction matching, avoiding damage to the filling material and hole punching, and retaining the inherent performance of the original bamboo tube to the greatest extent.
Compared with a single original bamboo tube, the axial compression resistance of the whole bamboo tube increases almost exponentially, and the lateral loading increases by more than 30%, meeting the needs of strength and stability, while achieving the goal of pure green and environmental protection.
Smart Images
Figure CN222758867U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of construction and water conservancy infrastructure, in particular to a full-bamboo sleeve. Background Art
[0002] In traditional minority residential buildings in my country, round bamboo is often selected as the main building material because of its easy material acquisition, low price, light weight and toughness. Although raw bamboo can be used in the construction field, such as bamboo scaffolding, in the process of water conservancy infrastructure construction, small and medium-sized logs are selected to protect embankments and strengthen weak foundations because of the thin walls of round bamboo and weak strength. If the raw bamboo columns are directly used in the foundation, it is necessary to solve the technical problems of relatively low strength, easy instability and large deformation of the round bamboo itself. In order to solve the above technical problems, there is a method in the prior art to directly fill cement and other filling materials in the raw bamboo tube to improve the strength, but such sleeves filled with other materials cannot meet the pure green and environmental protection needs advocated recently. In order to meet the pure green and environmental protection needs advocated, there is a technical solution in the prior art to select two or more raw bamboo tubes of basically the same size and set them side by side, and punch holes to fix them with bolts or hoops. This method has a relatively low increase in mechanical strength, and the raw bamboo tube is easily damaged at the place where holes are punched or reinforced. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a full bamboo sleeve which retains the original bamboo tube properties and has higher strength.
[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0005] A full bamboo sleeve comprises a first original bamboo tube and a second original bamboo tube of the same length, wherein the first original bamboo tube is sleeved outside the second original bamboo tube and the inner wall of the first original bamboo tube is frictionally matched with the outer wall of the second original bamboo tube.
[0006] As a further improvement of the above technical solution:
[0007] Both ends of the first original bamboo tube and the second original bamboo tube are aligned.
[0008] The outer wall of the second original bamboo tube contacts the inner wall of the first original bamboo tube at the bamboo node position, and a gap exists between the outer wall of the second original bamboo tube and the inner wall of the first original bamboo tube at the non-bamboo node position.
[0009] The first original bamboo tube inner wall contacts the second original bamboo tube outer wall at the bamboo partition position, and a gap exists between the first original bamboo tube inner wall and the second original bamboo tube outer wall at the non-bamboo partition position.
[0010] There is no filling material layer in the gap between the second original bamboo tube and the first original bamboo tube.
[0011] The width D of the gap is 2 mm to 15 mm.
[0012] The second original bamboo tube has no filling material layer therein.
[0013] The height difference s1 of the inner wall of the first original bamboo tube at the bamboo partition part is 0mm-10mm, and the height difference s2 of the outer wall of the second original bamboo tube at the bamboo node part is 0mm-10mm.
[0014] The bamboo partitions of the first original bamboo tube and the bamboo nodes of the second original bamboo tube may be arranged in a staggered or non-staggered manner.
[0015] The lengths of the first original bamboo tube and the second original bamboo tube are 200-300 cm, the outer diameter of the first original bamboo tube is 10-15 cm, and the outer diameter of the second original bamboo tube is 7-8 cm.
[0016] Compared with the prior art, the advantages of the utility model are:
[0017] The utility model adopts a full bamboo sleeve, which adopts a first original bamboo tube and a second original bamboo tube of the same length. The second original bamboo tube is sleeved outside the first original bamboo tube, and the inner wall of the second original bamboo tube is frictionally matched with the outer wall of the first original bamboo tube. Round bamboos of different diameters are arranged in a "big bamboo tube sleeves small bamboo tubes" mode, and the connection between the two is achieved by relying on the matching mode of the inner wall of the first original bamboo tube and the outer wall of the second original bamboo tube. Compared with a single original bamboo tube, the full bamboo sleeve of the utility model has an axial compression resistance that is almost doubled and a lateral load-bearing capacity that is increased by more than 30%. The original bamboo tubes are abundant in source and are easy to manufacture, carry and transport. Compared with the technical solution of arranging two original bamboo tubes in parallel, there is no need to drill holes to destroy the original bamboo tubes, and the inherent properties of the original bamboo tubes are retained to the greatest extent, so the full bamboo sleeve can be used as bamboo columns or bamboo piles. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the full bamboo sleeve of Example 1.
[0019] Figure 2 for Figure 1 Section view along line AA.
[0020] Figure 3 for Figure 2 A partial enlarged view of point B in the middle.
[0021] Figure 4 It is a structural schematic diagram of the all-bamboo sleeve of comparative example 2.
[0022] Figure 5 for Figure 4 Section view along CC line.
[0023] Figure 6 for Figure 5 A partial enlarged view of point D in the middle.
[0024] Figure 7 The load variation curves of the axial mechanical bearing of the full bamboo sleeve of each embodiment and the comparative example are as a function of the longitudinal displacement.
[0025] Figure 8 The load-strain variation curves of the axial mechanical bearing of the full bamboo sleeve of each embodiment and comparative example.
[0026] Fig. 9 The load of the full bamboo sleeve of each embodiment and comparative example varies with the lateral displacement in the column.
[0027] Fig.10 This is the dynamic distribution of the DIC strain field of the axial mechanical load of the full bamboo sleeve in Example 1.
[0028] Fig.11 This is the dynamic distribution of the DIC displacement field of the axial mechanical load of the full bamboo sleeve in Example 1.
[0029] Fig.12 The load-displacement curves of the full bamboo sleeves of various embodiments and comparative examples are shown in FIG.
[0030] Fig.13 The load-strain curves of the full bamboo sleeves of various embodiments and comparative examples are shown in FIG.
[0031] Fig.14 This is the dynamic distribution of the DIC strain field of the all-bamboo sleeve under side loading in Example 1.
[0032] Fig.15 This is the dynamic distribution of the DIC displacement field of the side-loaded all-bamboo sleeve in Example 1.
[0033] Fig.16 This is the dynamic distribution of the DIC strain field of the axial mechanical load of a single original bamboo tube in comparative example 1.
[0034] Fig.17 This is the dynamic distribution of the DIC displacement field of the axial mechanical load of a single original bamboo tube in comparative example 1.
[0035] Fig.18 This is the dynamic distribution of the DIC strain field of the axial mechanical load of the all-bamboo sleeve in comparative example 2.
[0036] Fig.19 Dynamic distribution of DIC displacement field of the axial mechanical load of the all-bamboo sleeve in comparative example 2.
[0037] The symbols in the figure represent:
[0038] 1. The first original bamboo tube; 2. The second original bamboo tube; 3. The filling layer. DETAILED DESCRIPTION
[0039] The utility model will be described in further detail below. Unless otherwise specified, the instruments or materials used in the utility model are commercially available.
[0040] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.
[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0042] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0043] Example 1
[0044] like Figure 1 , Figure 2 and Figure 3 As shown, the full bamboo sleeve of this embodiment includes a first original bamboo tube 1 and a second original bamboo tube 2 of the same length. The first original bamboo tube 1 is sleeved outside the second original bamboo tube 2, and the inner wall of the first original bamboo tube 1 and the outer wall of the second original bamboo tube 2 are frictionally matched. The utility model adopts the mode of "big bamboo tube sleeve small bamboo tube" for round bamboos of different diameters, and realizes the connection between the two by frictionally matching the inner wall of the first original bamboo tube 1 and the outer wall of the second original bamboo tube 2. Compared with a single original bamboo tube pile, the full bamboo sleeve of the utility model has an axial compression resistance that is almost doubled and a lateral load that is increased by more than 30%. The original bamboo tube is rich in sources and is easy to make, carry and transport. Compared with the technical solution of arranging two original bamboo tubes in parallel, there is no need to punch holes to destroy the original bamboo tube, and the inherent properties of the original bamboo tube are retained to the greatest extent.
[0045] The first original bamboo tube 1 and the second original bamboo tube 2 are aligned at both ends. By aligning the two ends, the first original bamboo tube 1 has the second original bamboo tube 2 along the length direction, so that the strength of the whole bamboo sleeve is roughly evenly distributed, and there is no obvious weak part.
[0046] In this embodiment, the inner wall of the first original bamboo tube 1 contacts the outer wall of the second original bamboo tube 2 at the bamboo partition, and there is a gap between the inner wall of the first original bamboo tube 1 and the outer wall of the second original bamboo tube 2 at the non-bamboo partition. In other embodiments, the outer wall of the second original bamboo tube 2 contacts the inner wall of the first original bamboo tube 1 at the bamboo joint, and there is a gap between the outer wall of the second original bamboo tube 2 and the inner wall of the first original bamboo tube 1 at the non-bamboo joint. The existence of the gap can provide deformation space for the second original bamboo tube 2. In the utility model, the inherent property of the bamboo partition of the inner wall or the bamboo joint of the outer wall of the original bamboo tube has a height difference relative to other parts, and the bamboo partition or bamboo joint is used as a connection point. The inner wall of the first original bamboo tube 1 is connected to the outer wall of the second original bamboo tube 2 at the bamboo partition by an interference fit, forming a friction fit, so that the first original bamboo tube 1 and the second original bamboo tube 2 can not be easily separated.
[0047] like Figure 3 As shown, the width D of the gap is 2 mm to 15 mm. The width D varies slightly at different locations according to the natural straightness of the bamboo, such as 2 mm to 3 mm in the embodiment.
[0048] In this embodiment, the second original bamboo tube 2 does not have any filling material.
[0049] like Figure 3 As shown, in this embodiment, the height difference s1 of the inner wall of the first original bamboo tube 1 at the bamboo partition part is 0mm-10mm, excluding 0, and the height difference s2 of the outer wall of the second original bamboo tube 2 at the bamboo node part is 0mm-10mm, excluding 0. In this embodiment, s1=3mm, s2=3mm.
[0050] In this embodiment, the bamboo partitions of the first original bamboo tube 1 and the bamboo joints of the second original bamboo tube 2 are staggered. In other embodiments, the bamboo partitions of the first original bamboo tube 1 and the bamboo joints of the second original bamboo tube 2 may also be non-staggered. Compared with the non-staggered bamboo partitions and bamboo joints, the staggered bamboo partitions and bamboo joints make the full bamboo sleeve stronger.
[0051] The length of the first original bamboo tube 1 and the second original bamboo tube 2 is 200-300 cm, and in this embodiment, both are 240 cm.
[0052] The outer diameter of the first original bamboo tube 1 is 10-15 cm, and the outer diameter of the second original bamboo tube 2 is 7-8 cm. In this embodiment, the outer diameter of the first original bamboo tube 1 is 10 cm, and the outer diameter of the second original bamboo tube 2 is 7.5 cm.
[0053] The preparation method of the full bamboo sleeve of the present embodiment is as follows: Figure 7 As shown, the following steps are included:
[0054] S1. A round bamboo pole with a breast diameter of 10 cm is sawn from bottom to top into a length of 2.4 meters as an outer sleeve (i.e., the second original bamboo tube 2), and a round bamboo pole with a breast diameter of 7.5 cm is sawn from bottom to top into a length of 2.4 meters as an inner sleeve (i.e., the first original bamboo tube 1).
[0055] S2. First use a pickaxe to remove the bamboo partitions inside the outer sleeve, and then use a sand grinder to sand and grind the remaining parts; first use a milling machine to turn off the bamboo nodes on the inner sleeve, and then use a sand grinder to sand and grind the area around the bamboo nodes to make them smooth. Use a retractable probe to test the inner diameter difference of ±3mm at the bamboo partitions of the outer sleeve (near 10cm from the bamboo partitions), and use a vernier caliper to test the outer diameter difference of ±3mm at the bamboo nodes of the inner sleeve (near 10cm from the bamboo nodes).
[0056] S3. Insert the inner sleeve round bamboo into the outer sleeve round bamboo to obtain a full bamboo sleeve (denoted as CT), the gap at one end of which is ±2mm, and the gap at the other end is ±3mm.
[0057] Comparative Example 1
[0058] This comparative example is a single raw bamboo tube, the raw bamboo production conditions are the same as those in Example 1, and includes a first raw bamboo tube 1.
[0059] The method for preparing the single original bamboo tube of this embodiment comprises the following preparation steps:
[0060] A1. A round bamboo pole with a breast diameter of 10 cm is sawn from bottom to top into 2.4 m long without removing the green and yellow parts, and a single original bamboo stump (denoted as CZ) is obtained.
[0061] Comparative Example 2
[0062] like Figure 4 , Figure 5 , Figure 6 As shown, the full bamboo sleeve of this comparative example is substantially the same as that of Example 1, except that the full bamboo sleeve further comprises a filling layer 3, and the filling layer 3 is located in the gap between the second original bamboo tube 2 and the first original bamboo tube 1.
[0063] The filling layer 3 is a resin layer or a cement layer. In this comparative example, the resin layer is an epoxy resin layer.
[0064] A method for preparing a full bamboo sleeve of this comparative example, the round bamboo production conditions are the same as those in Example 1, and the gap between the inner and outer sleeves is filled with epoxy resin, comprising the following steps:
[0065] S1. A round bamboo pole with a breast diameter of 10 cm is sawn from bottom to top into a length of 2.4 meters as an outer sleeve (i.e., the second original bamboo tube 2), and a round bamboo pole with a breast diameter of 7.5 cm is sawn from bottom to top into a length of 2.4 meters as an inner sleeve (i.e., the first original bamboo tube 1).
[0066] S2. First use a pickaxe to remove the bamboo partitions inside the outer sleeve, and then use a sand grinder to sand and grind the remaining parts; first use a milling machine to turn off the bamboo nodes on the inner sleeve, and then use a sand grinder to sand and grind the area around the bamboo nodes to make them smooth. Use a retractable probe to test the inner diameter difference of ±3mm at the bamboo partitions of the outer sleeve (near 10cm from the bamboo partitions), and use a vernier caliper to test the outer diameter difference of ±3mm at the bamboo nodes of the inner sleeve (near 10cm from the bamboo nodes).
[0067] S3. Insert the inner sleeve round bamboo into the outer sleeve round bamboo, with a gap of ±2mm at one end and a gap of ±3mm at the other end. Seal the end with a small gap with epoxy resin. After the epoxy resin is completely cured, slowly pour the epoxy resin from the end with a large gap. If the gap is completely filled, stop pouring the epoxy resin. Then place the bamboo column / pile poured with epoxy resin at a temperature of 25±5℃, in a dry, shaded, rain-proof place to wait for the resin to be completely cured, and obtain a full bamboo sleeve (recorded as CTG) with resin filling the gap between the tubes.
[0068] The axial mechanical bearing test was carried out on the full bamboo sleeve (CT) of Example 1, the single original bamboo sleeve (CZ) of Comparative Example 2, and the full bamboo sleeve (CTG) of Example 2. The test results are shown in the figure Figures 7 to 19 As shown in the figure, the maximum failure load of the full bamboo sleeve (CT) under axial and lateral loading is significantly greater than that of the single original bamboo pile (CZ) and the full bamboo sleeve with resin-filled inter-tube gap (CTG): (1) Figures 7 to 9 It can be seen that ( Figure 8 The vertical and horizontal represent longitudinal loading and transverse loading. In the elastic stage of axial loading, the slope CZ≈CT<CTG. The rigidity of CTG after the gap between the cylinders is filled with resin is enhanced to the maximum. The sleeve structure has little effect on the overall stiffness, but the plastic deformation capacity of CZ is stronger than that of CT, which means that CZ is more difficult to recover than CT. In the axial loading failure stage, the peak load average of CZ is 87.46 KN, the peak load average of CT is 179.89 KN, and the peak load average of CTG is 152.23 KN. The compressive bearing capacity of CT is increased by 105.68% compared with that of CZ column, while the compressive bearing capacity of CTG is increased by 74.06% compared with that of CZ column. (2) From Figures 12 to 13 It can be seen that ( Fig.1275 and 100 represent the distance from the bottom of the fixed force point when the tube is loaded, in cm. The vertical and horizontal represent whether the loading force is longitudinal loading or transverse loading. In the elastic stage of lateral loading, the slope CZ is less than CT. The sleeve structure significantly increases the rigidity of the full bamboo sleeve. In the destructive stage of lateral loading, the peak load of CZ is 2.56 KN, and the peak load of CT is 3.79 KN. The compressive bearing capacity of CT is increased by 48.05% compared with that of CZ column. (3) Figures 10 to 11 and Figures 14 to 19 It can be seen that the CT and CZ strain cloud diagrams show concentration when unstable, and the CTG strain cloud diagram shows stress concentration in the central area.
[0069] Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.
Claims
1. A full bamboo sleeve, characterized in that: It comprises a first original bamboo tube (1) and a second original bamboo tube (2) of the same length, wherein the first original bamboo tube (1) is sleeved outside the second original bamboo tube (2) and the inner wall of the first original bamboo tube (1) is frictionally matched with the outer wall of the second original bamboo tube (2).
2. The all-bamboo sleeve according to claim 1, characterized in that: The inner wall of the first original bamboo tube (1) contacts the outer wall of the second original bamboo tube (2) at the bamboo partition part, and a gap exists between the inner wall of the first original bamboo tube (1) and the outer wall of the second original bamboo tube (2) at the non-bamboo partition part.
3. The all-bamboo sleeve according to claim 2, characterized in that: The outer wall of the second original bamboo tube (2) contacts the inner wall of the first original bamboo tube (1) at the bamboo node, and a gap exists between the outer wall of the second original bamboo tube (2) and the inner wall of the first original bamboo tube (1) at the non-bamboo node.
4. The all-bamboo sleeve according to claim 2 or 3, characterized in that: There is no filling material layer in the gap between the second original bamboo tube (2) and the first original bamboo tube (1).
5. The all-bamboo sleeve according to claim 2 or 3, characterized in that: The width D of the gap is 2 mm to 15 mm.
6. The all-bamboo sleeve according to claim 2 or 3, characterized in that: The second original bamboo tube (2) does not have a filling material layer.
7. The all-bamboo sleeve according to claim 2 or 3, characterized in that: The height difference s1 of the inner wall of the first original bamboo tube (1) at the bamboo partition part is 0 mm to 10 mm, and the height difference s2 of the outer wall of the second original bamboo tube (2) at the bamboo node part is 0 mm to 10 mm.
8. The all-bamboo sleeve according to claim 2 or 3, characterized in that: The bamboo partition part of the first original bamboo tube (1) and the bamboo node part of the second original bamboo tube (2) are arranged in a staggered or non-aligned manner.
9. The all-bamboo sleeve according to claim 2 or 3, characterized in that: The lengths of the first original bamboo tube (1) and the second original bamboo tube (2) are 200 to 300 cm, the outer diameter of the first original bamboo tube (1) is 10 to 15 cm, and the outer diameter of the second original bamboo tube (2) is 7 to 8 cm.