WO2018076490A1 - 一种用于竹复合综合管廊的直管及包括该直管的管廊 - Google Patents

一种用于竹复合综合管廊的直管及包括该直管的管廊 Download PDF

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WO2018076490A1
WO2018076490A1 PCT/CN2016/110011 CN2016110011W WO2018076490A1 WO 2018076490 A1 WO2018076490 A1 WO 2018076490A1 CN 2016110011 W CN2016110011 W CN 2016110011W WO 2018076490 A1 WO2018076490 A1 WO 2018076490A1
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Prior art keywords
bamboo
layer
winding
wound
curtain
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PCT/CN2016/110011
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English (en)
French (fr)
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叶柃
殷建学
赵柱石
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浙江鑫宙竹基复合材料科技有限公司
叶柃
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Publication of WO2018076490A1 publication Critical patent/WO2018076490A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/003—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised by the matrix material, e.g. material composition or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0004—Synthetics
    • E02D2300/0006—Plastics
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0071—Wood

Definitions

  • the invention belongs to the technical field of pipe corridors, and in particular to a straight pipe for a bamboo composite integrated pipe gallery and a pipe gallery including the straight pipe.
  • the pipe gallery is a municipal facility built on the underground of the city for the laying of municipal pipelines. It integrates various municipal pipelines such as electric power, communication, radio and television, gas, water supply and drainage, and heat, effectively utilizing the space under the road, conserving underground space resources, and eliminating irregular excavation of various professional pipelines.
  • various municipal pipelines such as electric power, communication, radio and television, gas, water supply and drainage, and heat, effectively utilizing the space under the road, conserving underground space resources, and eliminating irregular excavation of various professional pipelines.
  • the impact of the passage and the surrounding environment completely solved the problems of “road zipper” and “air spider web”.
  • the existing pipe porches are usually prepared by cast-in-place or prefabricated reinforced concrete structures.
  • This pipe porch consumes a lot of materials, has a large amount of construction work, has a long construction period and high cost, and on the other hand, it uses reinforced concrete materials.
  • the energy consumption is large, and a large amount of emissions are generated in the production process, which has a great impact on the environment, and it is increasingly difficult to adapt to the needs of energy conservation and emission reduction and modern urban construction.
  • the applicant's prior application patent CN 205136858U discloses a prefabricated bamboo composite pipe gallery in which the structural layers of the pipe joints constituting the pipe gallery are widely used.
  • bamboo material preparation Specifically, the tube body comprises, in order from the inside to the outside, an inner liner layer, a structural layer and an outer protective layer.
  • the inner liner layer comprises a flame retardant resin and a flame retardant fabric
  • the structural layer comprises at least several layers which are adhered by water.
  • a bamboo raft layer formed by winding a bamboo raft of a resin, the outer protective layer comprising at least a flame retardant resin, and the bearing member is fixed on an inner surface of the tubular body. Since the pipe body structure layer is made of bamboo raft, the pipe body and its production process are green and environmentally friendly. While ensuring the strength, the quality is light, transportation and installation are convenient, and the bamboo is a renewable resource, and the raw material cost is low.
  • This kind of pipe gallery overcomes the current cost of materials for reinforced concrete structure pipe gallery, large construction engineering, long construction period, high cost, large energy consumption and emissions, and non-recyclable and degradable. Defects.
  • the structural layer in the pipe body is the main body that carries the force, so it is important to ensure the strength or ring stiffness of the structural layer.
  • the structural layer in the bamboo composite pipe gallery is made of bamboo crucible adhered to the water-soluble resin through the resin groove, spirally wound or circumferentially wound around the inner liner layer, and wound to a certain design thickness and cured. After formation, its structural strength is better guaranteed.
  • the current size of the bamboo raft in the bamboo curtain is not limited to the size and arrangement of the bamboo raft, and these are the key factors affecting the strength of the structural layer, so that There is still room for improvement in the strength or ring stiffness of the tubular structural layer of the pipe gallery.
  • the fire performance is very important for the performance of the pipe gallery.
  • the structural layer is also required to be fireproof, especially the bamboo-based material in which the structural layer is flammable in the above scheme. Although a certain fireproof performance can be ensured by adding a fireproof resin or a filler in the structural layer, there is still a possible fireproof risk because the bamboo is flammable.
  • the present invention provides a straight pipe for a bamboo composite integrated pipe gallery and a pipe gallery including the straight pipe, which adopts a structural size specification of a bamboo raft in the pipe structure layer and Improvements in the winding process and the like allow the prepared straight tube to have excellent strength and fire resistance.
  • a straight pipe for a bamboo composite integrated pipe gallery which can communicate with each other to form a pipe gallery, wherein the pipe body of the straight pipe is sequentially inwardly from the inside to the outside.
  • the inner liner layer, the structural layer and the outer protective layer are formed by winding a bamboo material on the inner liner layer and curing by adding a fireproof resin, characterized in that
  • the bamboo material used for winding is a bamboo curtain formed by connecting a plurality of bamboo rafts through a braiding line, wherein Each of the bamboo rafters is arranged at equal intervals in the width direction of the bamboo rafters, and the bamboo drapes comprise an axial bamboo drapes and a reversing bamboo drapes, wherein the length direction of the axial bamboo drapes and the width direction of the bamboo rafts therein Consistently, the length direction of the circular bamboo curtain is consistent with the longitudinal direction of the bamboo raft;
  • the structural layer is formed by a first winding layer formed by spirally winding the bamboo curtain in the axial direction of the bamboo curtain along the longitudinal direction of the bamboo curtain, and the axial bamboo curtain is arranged along the bamboo curtain in the axial direction of the tube body.
  • a second winding layer formed by spirally winding in a length direction is alternately laminated, wherein a minimum width of the spirally wound edge in the first winding layer is not less than 1/4 of a width of the bamboo curtain, and a spiral winding edge in the second winding layer The minimum width is not less than 1/5 of the width of the bamboo curtain, and the spirally wound edge in the first wound layer does not coincide with the spirally wound edge in the second wound layer, so that the straight tube body structure layer is Both the hoop and the axial direction have good strength.
  • the arrangement of the two winding layers which are alternately formed by winding the two types of bamboo curtains respectively, so that the pipe gallery has good strength in the axial direction and the changing direction as a whole on the other hand, wherein the minimum width of the spirally wound edge in the first wound layer and the minimum width of the spiral wound edge in the second wound layer ensure that the bamboo sheet can be fully stretched during winding in such a large diameter annular winding, and its axis The tensile strength is maximized, and the tensioned bamboo slab is formed in the structural layer, which greatly increases the mechanical strength of the structural layer, enabling it to have a high structural strength.
  • the first wound layer is a plurality of layers, and the directions in which the adjacent two first wound layers are spirally wound are different.
  • the second wound layer is a plurality of layers, and the directions in which the adjacent two second wound layers are spirally wound are different.
  • Different winding methods cooperate with each other to make the formed structural layer have better structural strength, and is more favorable for filling and infiltration of the resin and the filler.
  • the number of the first wound layer layers is larger than that of the second wound layer.
  • the first wound layer and the second wound layer are added with the same fireproof resin, and the resin is simultaneously added with a biomass filler, wherein the fiber content of the filler More than 40% by weight, the particle size is between 60-80 mesh.
  • the same fireproof resin to the two wound layers, it can be completely impregnated into the gap of the filled bamboo curtain and infiltrated the bamboo slab, and after curing, the bonding between the wound layers can be ensured. Tight, good bonding strength and fire resistance, and the above-mentioned content and particle size of the biomass filler added in the resin can make the tensile strength after curing more than 50Mpa, and the Barcol hardness is more than 40, thereby further optimizing the tubular structure layer. Strength and fire resistance.
  • the axial bamboo curtain or the reversing bamboo curtain has a length of 150 ⁇ 2 m and a width of 200 ⁇ 5 mm.
  • the pitch of each of the bamboo rafts in the axial bamboo drapes is 1.0 ⁇ 0.2 mm.
  • the distance between the bamboo rafts in the hoop bamboo curtain is 2.0 ⁇ 0.2 mm.
  • Another aspect of the present invention provides a pipe gallery including the above straight pipe, which is formed by sequentially connecting the straight pipes through a connecting member.
  • the arrangement of the two winding layers alternately formed by the two types of bamboo curtains of different structures is wound, so that the pipe gallery has good strength in the axial direction and the change direction as a whole, in particular , wherein the minimum width of the spirally wound edge in the first wound layer and the minimum width of the spirally wound edge in the second wound layer ensure that the bamboo sheet can be fully stretched during winding in such a large diameter annular winding,
  • the axial tensile strength is maximized, so that the tensioned bamboo slab is formed in the structural layer, which greatly improves the mechanical strength of the structural layer, so that it can have a high structural strength;
  • the arrangement of the specific size and specifications of the bamboo curtain for winding including the setting of the length and width of the bamboo curtain, the spacing of the bamboo sheets in the axial bamboo curtain, and the circumferential direction bamboo
  • the spacing of the bamboo rafts in the drapes makes it possible to match the pipe body with a large inner diameter during winding, wherein the tensile strength of the bamboo can be maximized, so that the prepared straight pipe structure has the strongest strength. excellent;
  • FIG. 1 is a schematic structural view of a straight pipe according to an embodiment of the present invention.
  • FIG. 2 is a schematic view showing the structure of a pipe joint formed by a straight pipe according to an embodiment of the present invention
  • Figure 3 is a schematic view showing the structure of a bamboo curtain for winding in a straight pipe according to an embodiment of the present invention
  • FIG. 4 is a schematic view showing another structure of a bamboo blind for winding in a straight pipe according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural view of a straight pipe according to an embodiment of the present invention.
  • a straight pipe for a bamboo composite integrated pipe gallery which is a main component of a pipe gallery, is used to communicate with each other through a connecting member to form a pipe gallery.
  • the pipe body of the straight pipe includes an inner lining layer, a structural layer and an outer protective layer in the radial direction from the inside to the outside, wherein the inner lining layer and the outer protective layer are used to protect the structural layer and make the pipe body waterproof.
  • the structural layer is the main reinforcement structure of the pipe body.
  • Liner layer includes Flame retardant resin and flame retardant fabric, flame retardant resin can be vinyl ester resin, epoxy resin and other resins with good water resistance and corrosion resistance. It can also be added with filler such as curing agent in the resin.
  • the flame retardant fabric can have resistance.
  • Non-woven fabrics such as flammable non-woven fabrics, mesh fabrics, knitted felts, etc.
  • the outer protective layer includes at least a flame retardant resin, and may be a resin which is excellent in water repellency and corrosion resistance such as a vinyl ester resin or an epoxy resin, and may also be cured. Fillers such as agents and dyes.
  • the structural layer is wound on the inner liner by bamboo and is cured by adding a fireproof resin, wherein the bamboo for winding is a bamboo curtain formed by connecting a plurality of bamboo rafts through a braiding line.
  • each bamboo curtain is formed by weaving bamboo rafts in parallel in the width direction of the bamboo rafts.
  • the ring-shaped bamboo curtain refers to the length direction of the bamboo curtain and the length direction of the bamboo sheet, wherein the length of the bamboo sheet can be formed by sequentially overlapping a plurality of bamboo curtains having a small length. It can be wound into a roll before winding to facilitate the installation and positioning in transportation and winding.
  • the bamboo rafts of the ring-shaped bamboo drapes are also formed into a ring shape in the longitudinal direction, and are therefore also referred to as a ring-shaped bamboo curtain.
  • the pitch of each bamboo sheet in the circumferential bamboo curtain is preferably 2.0 ⁇ 0.2 mm.
  • the axial bamboo blinds mean that the overall length direction of the bamboo blinds coincides with the width direction of the bamboo strips, that is, the width of the bamboo blinds is the same as the length of the bamboo strips therein.
  • the length of the axial bamboo curtain can be controlled by the number of bamboo rafts according to actual needs. It can be wound into a roll before being wound to facilitate installation and positioning in transportation and winding.
  • the bamboo rafts of the axial bamboo drapes are also corresponding to the axial direction of the roll in the longitudinal direction, and are therefore also referred to as axial bamboo drapes.
  • the spacing of each bamboo sheet in the axial bamboo curtain is preferably 1.0 ⁇ 0.2 mm.
  • the bamboo raft is divided into bamboo pieces by the original bamboo in the radial direction, and is cut along the length of the bamboo piece after removing the bamboo yellow and the outer surface of the bamboo surface. Its The thickness is preferably 0.9 ⁇ 0.2 mm.
  • the axial bamboo blind or the reversing bamboo curtain has a length of 150 ⁇ 2 m and a width of 200 ⁇ 5 mm.
  • the structural layer is formed by spirally winding the bamboo curtain in the axial direction of the bamboo curtain along the longitudinal direction of the bamboo curtain, respectively, and the axial bamboo curtain is in the axial direction of the bamboo curtain along the longitudinal direction of the bamboo curtain
  • the second wound layer formed by spiral winding is alternately laminated.
  • the inner layer is in contact with the inner layer, that is, the inner layer is first wound around the bamboo curtain.
  • the upper line is moved, and the ring-shaped bamboo curtain is wound on the inner liner to be spirally wound to form a first wound layer.
  • the fire-retardant resin and the corresponding biomass filler are continuously added during winding and after winding to ensure that they fill the voids and infiltrate the bamboo raft.
  • one end of the axial bamboo coil in the longitudinal direction is aligned with the first winding layer, and the annular bamboo curtain is gradually released in the rotation of the inner liner layer and the first winding layer, and is axially opposite to the circumferential bamboo curtain.
  • the upper linear movement, and then the axial bamboo curtain is wound spirally around the first wound layer to form a second wound layer.
  • the fire-retardant resin and the corresponding biomass filler are continuously added during winding and after winding to ensure that they fill the voids and infiltrate the bamboo raft.
  • the above winding process is sequentially cycled, and the first wound layer and the second wound layer are alternately laminated on the inner liner layer to form a structural layer, and the fireproof resin and the corresponding biomass are continuously added.
  • the filler ensures that the gap between the bamboo rafts and the bamboo rafts are wetted and solidified to form a structural layer.
  • the bamboo flakes in each wound layer exert their optimal mechanical properties, and at the same time, the fireproof resin and the corresponding biomass filler can fully fill and infiltrate the bamboo flakes to achieve
  • the structural layer has good structural strength.
  • the winding method and the winding process of each wound layer are improved.
  • the minimum width of the spiral wound edge in the first wound layer is not less than 1/ of the width of the bamboo curtain. 4.
  • the minimum width of the spirally wound edge in the second wound layer is not less than 1/5 of the width of the bamboo curtain, and the spirally wound edge in the first wound layer does not coincide with the spirally wound edge in the second wound layer.
  • the lap is the adjacent two winding tapes.
  • the transition part has a great influence on the strength of the wound layer, and is directly related to the tightness of the bonding of the wound layers and the full play of the mechanical properties of the bamboo sheet in the wound layer.
  • the minimum width of the spirally wound edge and the minimum width of the spirally wound edge in the second wound layer ensure that the bamboo sheet can be fully stretched during winding of such a large diameter, and the axial tensile strength is maximized. Maximization, such a tensioned bamboo raft is formed in the structural layer, greatly improving the mechanical strength of the structural layer, enabling it to have a high structural strength.
  • the filler contained in the matrix resin is a biomass powder in which the cellulose content is ⁇ 40%, and the fineness P is preferably in the range of 60 mesh ⁇ P ⁇ 80 mesh.
  • the biomass filler having the above content and particle size added to the resin can be made to have a tensile strength of more than 50 MPa and a Barcol hardness of more than 40 after curing, thereby further optimizing the strength and fire resistance of the tubular structural layer.
  • the fireproof resin is preferably one of an epoxy resin, an amino resin, a phenol resin, an unsaturated polyester resin, and a polyurethane resin having fire resistance.
  • a pipe joint can be formed between the joints of the joints, for example, by a bundle joint, or by making the pipe end a socket connection or the like.

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Abstract

一种用于竹复合综合管廊的直管以及由直管相互连通形成的管廊，直管的管体在径向由内至外依次包括内衬层、结构层和外防护层，结构层通过竹材缠绕在内衬层上并通过添加防火性树脂粘结固化而成，结构层由分别通过环向竹篾帘在管体轴向上沿竹篾帘长度方向螺旋缠绕形成的第一缠绕层和轴向竹篾帘在管体轴向上沿竹篾帘长度方向螺旋缠绕形成的第二缠绕层交替层叠而成，其中第一缠绕层中螺旋缠绕搭边最小宽度不少于竹篾帘宽度的1/4，第二缠绕层中螺旋缠绕搭边最小宽度不少于竹篾帘宽度的1/5，且第一缠绕层中螺旋缠绕搭边与第二缠绕层中螺旋缠绕搭边不重合。通过对管体结构层中竹篾的结构尺寸规格以及缠绕工艺等的改进，使得制备的直管及相应的管廊具有优良的强度和防火性能。

Description

一种用于竹复合综合管廊的直管及包括该直管的管廊 [技术领域]
本发明属于管廊技术领域，具体地，涉及一种用于竹复合综合管廊的直管及包括该直管的管廊。
[背景技术]
管廊是建于城市地下用于敷设市政管线的市政设施。其集电力、通信、广电、燃气、给排水、热力等多种市政管线于一体，有效地利用了道路下的空间，节约地下空间资源，也杜绝了各专业管线分别不定期开挖，对道路通行和周边环境造成的影响，彻底解决了“马路拉链”、“空中蜘蛛网”等问题。
现有的管廊通常采用钢筋混凝土结构通过现浇或预制方式制备得到，这种管廊一方面耗费材料多，建设工程量大，施工周期长，造价高，另一方面其采用的钢筋混凝土材料能耗大，生产过程中造成大量的排放，对环境影响很大，越来越难以适应节能减排以及现代化城市建设的需求。
为克服上述缺陷，现有技术中出现了新型材料制备的管廊，例如申请人在先申请的专利CN 205136858U公开了一种预制竹复合管廊，其中组成管廊的管节的结构层大量采用竹材料制备。具体地，该管体径向由内至外依次包括内衬层、结构层和外防护层，该内衬层包括阻燃树脂和阻燃织物，该结构层至少包括若干层由粘附有水溶性树脂的竹篾缠绕而成的竹篾层，该外防护层至少包括阻燃树脂，该承力构件固定在该管体的内表面上。由于管廊管体结构层采用竹篾制成，使得管体及其生产制作过程绿色环保，在保证强度的同时，质量轻，运输及安装方便，且竹子为可再生资源，原材料成本低。这种管廊克服了目前钢筋混凝土结构管廊存在的耗费材料多，建设工程量大，施工周期长，造价高以及能耗和排放大，不可回收和降解 的缺陷。
因为管廊内径较大，甚至达到8-10m，且埋置于地下并容纳有各种管道管线，包括各种水、电甚至燃气等，因此对其整体强度要求很高，以保证管道管线的安全。管廊管体中的结构层是承载受力的主体，因此保证结构层的强度或环刚度至关重要。上述技术方案中，尽管竹复合管廊中的结构层采用竹篾通过树脂槽粘附上水溶性树脂后螺旋交叉缠绕或环向排列缠绕在内衬层上，且缠绕至一定设计厚度并经过固化后形成，其结构强度得到较好的保证。但是，一方面目前这种管廊对竹篾帘中竹篾的尺寸、编排方式、以及竹篾的缠绕方式及缠绕工艺没有具体的限定，这些都是影响结构层的强度的关键因素，使得目前管廊的管体结构层的强度或环刚度仍有提升空间。
另外，防火性能对管廊性能非常关键，除了内衬层以及外防护层需要阻燃防火外，其中的结构层也是需要进行防火，特别是上述方案中结构层采用可燃性的竹基材料。尽管目前结构层中通过添加防火性树脂或填料可以保证一定的防火性能，但因为竹材可燃性较强，仍然存在可能的防火风险。
[发明内容]
针对现有技术的以上不足或改进需求，本发明提供一种用于竹复合综合管廊的直管及包括该直管的管廊，其通过对管体结构层中竹篾的结构尺寸规格以及缠绕工艺等的改进，使得制备的直管具有优良的强度和防火性能。
为实现上述目的，按照本发明的一个方面，提供一种用于竹复合综合管廊的直管，其可相互连通形成管廊，其中，该直管的管体在径向由内至外依次包括内衬层、结构层和外防护层，所述结构层通过竹材缠绕在所述内衬层上并通过添加防火性树脂粘结固化而成，其特征在于，
用于缠绕的竹材为由多条竹篾片通过编制线连接形成的竹篾帘，其中 各竹篾片在竹篾片宽度方向上平行等距间隔排列，且所述竹篾帘包括轴向竹篾帘和换向竹篾帘，其中轴向竹篾帘的长度方向与其中的竹篾片宽度方向一致，环向竹篾帘的长度方向与其中的竹篾片长度方向一致；
所述结构层由分别通过该环向竹篾帘在管体轴向上沿竹篾帘长度方向螺旋缠绕形成的第一缠绕层和该轴向竹篾帘在管体轴向上沿竹篾帘长度方向螺旋缠绕形成的第二缠绕层交替层叠而成，其中所述第一缠绕层中螺旋缠绕搭边最小宽度不少于竹篾帘宽度的1/4，第二缠绕层中螺旋缠绕搭边最小宽度不少于竹篾帘宽度的1/5，且所述第一缠绕层中螺旋缠绕搭边与第二缠绕层中螺旋缠绕搭边不重合，以此方式使得直管管体结构层在环向和轴向均具有良好的强度。
通过本发明上述构思的技术方案，一方面通过两类竹篾帘分别缠绕交替形成的两缠绕层的设置，使得管廊从整体上在轴向和换向上均具有良好的强度，另一方面，其中第一缠绕层中螺旋缠绕搭边最小宽度以及第二缠绕层中螺旋缠绕搭边最小宽度的设置可以保证在这种大直径的环形缠绕中竹篾片能够在缠绕时可以充分伸展，使其轴向拉伸强度发挥至最大化，这样张紧状态的竹篾片形成在结构层中，大大提高结构层的力学强度，使其能够具有很高的结构强度。
作为本发明的进一步优选，所述第一缠绕层为多层，相邻两第一缠绕层螺旋缠绕的方向不同。
作为本发明的进一步优选，所述第二缠绕层为多层，相邻两第二缠绕层螺旋缠绕的方向不同。
不同的缠绕方式相互配合，可以使得形成的结构层具有更优的结构强度，而且更有利于树脂及填料的填充和浸润。
作为本发明的进一步优选，所述第一缠绕层层数多于第二缠绕层。
作为本发明的进一步优选，所述第一缠绕层和第二缠绕层中添加的防火性树脂相同，且树脂中同时添加有生物质填料，其中填料的纤维丝含量 大于40wt％，颗粒度在60-80目之间。
通过本发明上述构思的技术方案，其通过在两缠绕层中添加同样的防火性树脂，可以使得其能够完全浸透填充竹篾帘空隙并浸润竹篾片，经固化后可以保证各缠绕层之间结合紧密，具有良好的结合强度和防火性能，而且树脂中添加的上述含量和颗粒大小的生物质填料可以使得其固化后拉伸强度大于50Mpa，巴氏硬度大于40，从而进一步优化管体结构层的强度以及防火性能。
作为本发明的进一步优选，所述轴向竹篾帘或换向竹篾帘的长度为150±2m，幅宽为200±5mm。
作为本发明的进一步优选，所述轴向竹篾帘中的各竹篾片间距在1.0±0.2mm。
作为本发明的进一步优选，所述环向竹篾帘中的各竹篾片间距在2.0±0.2mm。
本发明另一方面在于提供一种包括上述直管的管廊，其由所述直管通过连接件依次连接形成。
总体而言，通过本发明所构思的以上技术方案与现有技术相比，具有以下有益效果：
(1)本发明的直管中，通过两类不同结构的竹篾帘分别缠绕交替形成的两缠绕层的设置，使得管廊从整体上在轴向和换向上均具有良好的强度，特别是，其中第一缠绕层中螺旋缠绕搭边最小宽度以及第二缠绕层中螺旋缠绕搭边最小宽度的设置可以保证在这种大直径的环形缠绕中竹篾片能够在缠绕时可以充分伸展，使其轴向拉伸强度发挥至最大化，这样张紧状态的竹篾片形成在结构层中，大大提高结构层的力学强度，使其能够具有很高的结构强度；
(2)本发明中，用于缠绕的竹篾帘其具体尺寸和规格的设置，包括竹篾帘的长度和幅宽的设置、所述轴向竹篾帘中的各竹篾片间距以及环向竹 篾帘中的各竹篾片间距的设置，使得其在缠绕中可以与这种具有大内径的管廊管体匹配，其中竹材的拉伸强度可以得到最大的发挥，使得制备的直管结构强度最优；
(3)本发明中，通过在两缠绕层中添加同样的防火性树脂，可以使得其能够完全浸透填充竹篾帘空隙并浸润竹篾片，经固化后可以保证各缠绕层之间结合紧密，具有良好的结合强度和防火性能，而且树脂中添加的上述含量和颗粒大小的生物质填料可以使得其固化后拉伸强度大于50Mpa，巴氏硬度大于40，从而进一步优化管体结构层的强度以及防火性能。
[附图说明]
图1是按照本发明实施例的直管的结构示意图；
图2是按照本发明实施例的直管连接形成管廊的结构示意图；
图3是按照本发明实施例的直管中用于缠绕的一种竹篾帘结构示意图；
图4是按照本发明实施例的直管中用于缠绕的另一种竹篾帘结构示意图。
[具体实施方式]
为了使本实用新型的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本实用新型进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本实用新型，并不用于限定本实用新型。此外，下面所描述的本实用新型各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。
图1为本发明实施例的直管的结构示意图。如图1所示，本发明实施例的一种用于竹复合综合管廊的直管，其作为管廊的主要部件，用于通过连接件相互连通以形成管廊。
如图1所示，直管的管体在径向由内至外依次包括内衬层、结构层和外防护层，其中内衬层和外防护层均用以保护结构层，使管体防水、防渗漏、耐腐蚀，延长使用寿命，结构层为管体的主要增强结构。内衬层包括 阻燃树脂和阻燃织物，阻燃树脂可以为乙烯基酯树脂、环氧树脂等防水性、耐腐蚀性好的树脂，还可以在树脂中加入固化剂等填料，阻燃织物可以为具有阻燃性的无纺布、网格布、针织毡等织物；外防护层至少包括阻燃树脂，可以为乙烯基酯树脂、环氧树脂等防水性、耐腐蚀性好的树脂，还可以加入固化剂、染料等填料。
如图1所示，结构层通过竹材缠绕在内衬层上并通过添加防火性树脂粘结固化而成，其中用于缠绕的竹材为由多条竹篾片通过编制线连接形成的竹篾帘。
如图3和4所示，分别为用于作为缠绕材料的两种不同类型的竹篾帘，即轴向竹篾帘和环向竹篾帘。各竹篾帘是由竹篾片在竹篾片宽度方向上平行等距间隔排列后通过编织形成。
如图3所示，其中环向竹篾帘是指竹篾帘的长度方向与其中的竹篾片长度方向一致，其中竹篾片的长度可以通过多个长度较小的竹篾帘依次搭接所形成，在缠绕前可以将其卷绕呈卷，以便于运输及缠绕中的安装定位。环向竹篾帘呈卷后其中的竹篾片也相应在长度方向是形成环形，因此也称为环向竹篾帘。为了保证缠绕中树脂的填充度以及竹篾片发挥其最优的拉伸强度，环向竹篾帘中的各竹篾片间距优选在2.0±0.2mm。
如图4所示，轴向竹篾帘是指竹篾帘的整体长度方向与其中的竹篾片宽度方向一致，即竹篾帘的幅宽与其中的竹篾片长度相同。轴向竹篾帘的长度可以根据实际需要通过竹篾片数量进行控制。在缠绕前可以将其卷绕呈卷，以便于运输及缠绕中的安装定位。轴向竹篾帘呈卷后其中的竹篾片也相应在长度方向与卷的轴线方向一致，因此也称为轴向竹篾帘。为了保证缠绕中树脂的填充度以及竹篾片发挥其最优的拉伸强度，轴向竹篾帘中的各竹篾片间距优选在1.0±0.2mm。
轴向竹篾帘或换向竹篾帘中，竹篾片是由原竹在径向上剖分成竹片、并经去除竹片内表面竹黄和外表面竹青后沿竹片长度方向切削而成的，其 厚度优选是0.9±0.2mm。优选地，所述轴向竹篾帘或换向竹篾帘的长度为150±2m，幅宽为200±5mm。
结构层由分别通过该环向竹篾帘在管体轴向上沿竹篾帘长度方向螺旋缠绕形成的第一缠绕层和该轴向竹篾帘在管体轴向上沿竹篾帘长度方向螺旋缠绕形成的第二缠绕层交替层叠而成。具体地，优选紧贴内衬层的为第一缠绕层，即先通过环向竹篾帘缠绕内衬层。缠绕时，呈卷筒状的环向竹篾帘长度方向上的一端与内衬层固定对齐，在内衬层的旋转中逐渐释放环向竹篾帘，并相对环向竹篾帘在轴向上直线移动，进而将环向竹篾帘缠绕在内衬层上进行螺旋式缠绕，形成第一缠绕层。缠绕中以及缠绕后持续添加防火性树脂以及相应的生物质填料，保证其填充空隙并浸润竹篾。之后，轴向竹篾卷长度方向上的一端与第一缠绕层对齐固定，在内衬层及第一缠绕层的旋转中逐渐释放环向竹篾帘，并相对环向竹篾帘在轴向上直线移动，进而将轴向竹篾帘缠绕在第一缠绕层上螺旋缠绕，形成第二缠绕层。缠绕中以及缠绕后持续添加防火性树脂以及相应的生物质填料，保证其填充空隙并浸润竹篾。
根据结构层强度要求和层数设置依次循环上述缠绕过程，即可将第一缠绕层和第二缠绕层交替层叠在内衬层上形成结构层，经持续的添加防火性树脂以及相应的生物质填料保证竹篾间空隙以及竹篾被浸润后，固化即可形成结构层。
为了保证结构层中各缠绕层的充分结合和匹配，使得各缠绕层中竹篾片发挥其最优的力学性能，同时使得防火性树脂以及相应的生物质填料能够充分填充并浸润竹篾片，以达到结构层具有良好的结构强度，本发明中对各缠绕层的缠绕方式和缠绕工艺进行了改进，具体来说，第一缠绕层中螺旋缠绕搭边最小宽度不少于竹篾帘宽度的1/4，第二缠绕层中螺旋缠绕搭边最小宽度不少于竹篾帘宽度的1/5，且所述第一缠绕层中螺旋缠绕搭边与第二缠绕层中螺旋缠绕搭边不重合。螺旋缠绕中，搭边是相邻两缠绕带之 间的过渡部分，该过渡部分对缠绕层的强度具有较大影响，直接关系到各缠绕层的结合紧密性以及缠绕层中竹篾片力学性能的充分发挥。本方案中一方面通过两类竹篾帘分别缠绕交替形成的两缠绕层的设置，使得管廊从整体上在轴向和换向上均具有良好的强度，另一方面，其中第一缠绕层中螺旋缠绕搭边最小宽度以及第二缠绕层中螺旋缠绕搭边最小宽度的设置可以保证在这种大直径的环形缠绕中竹篾片能够在缠绕时可以充分伸展，使其轴向拉伸强度发挥至最大化，这样张紧状态的竹篾片形成在结构层中，大大提高结构层的力学强度，使其能够具有很高的结构强度。
基体树脂中所含填料为生物质粉末，其中的纤维素含量≥40％，细度P优选在60目≤P≤80目范围内。树脂中添加上述含量和颗粒大小的生物质填料，可以使得其固化后拉伸强度大于50Mpa，巴氏硬度大于40，从而进一步优化管体结构层的强度以及防火性能。
本实施例中，优选防火性树脂为具有防火性的环氧树脂、氨基树脂、酚醛树脂、不饱和聚酯树脂、聚氨酯树脂中的一种。
利用本发明的直管可以通过连接件连接之间形成管廊，比如可以通过束节连接，或将管端制成承插口连接等。
本领域的技术人员容易理解，以上所述仅为本实用新型的较佳实施例而已，并不用以限制本实用新型，凡在本实用新型的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本实用新型的保护范围之内。

Claims (9)

  1. 一种用于竹复合综合管廊的直管，其可相互连通形成管廊，其中，该直管的管体在径向由内至外依次包括内衬层、结构层和外防护层，所述结构层通过竹材缠绕在所述内衬层上并通过添加防火性树脂粘结固化而成，其特征在于，
    用于缠绕的竹材为由多条竹篾片通过编制线连接形成的竹篾帘，其中各竹篾片在竹篾片宽度方向上平行等距间隔排列，且所述竹篾帘包括轴向竹篾帘和换向竹篾帘，其中轴向竹篾帘的长度方向与其中的竹篾片宽度方向一致，环向竹篾帘的长度方向与其中的竹篾片长度方向一致；
    所述结构层由通过该环向竹篾帘在管体轴向上沿竹篾帘长度方向螺旋缠绕形成的第一缠绕层和该轴向竹篾帘在管体轴向上沿竹篾帘长度方向螺旋缠绕形成的第二缠绕层交替层叠而成，其中所述第一缠绕层中螺旋缠绕搭边最小宽度不少于竹篾帘宽度的1/4，第二缠绕层中螺旋缠绕搭边最小宽度不少于竹篾帘宽度的1/5，且所述第一缠绕层中螺旋缠绕搭边与第二缠绕层中螺旋缠绕搭边不重合，以此方式使得直管管体结构层在环向和轴向均具有良好的强度。
  2. 根据权利要求1所述的一种用于竹复合综合管廊的直管，其中，所述第一缠绕层为多层，相邻两第一缠绕层螺旋缠绕的方向不同。
  3. 根据权利要求1或2所述的一种用于竹复合综合管廊的直管，其中，所述第二缠绕层为多层，相邻两第二缠绕层螺旋缠绕的方向不同。
  4. 根据权利要求1至3中任一项所述的一种用于竹复合综合管廊的直管，其中，所述第一缠绕层层数多于第二缠绕层。
  5. 根据权利要求1至4中任一项所述的一种用于竹复合综合管廊的直管，其中，所述第一缠绕层和第二缠绕层中添加的防火性树脂相同，且树脂中同时添加有生物质填料，其中填料的纤维丝含量大于40 wt％，颗粒度 在60-80目之间。
  6. 根据权利要求1至5中任一项所述的一种用于竹复合综合管廊的直管，其中，所述轴向竹篾帘或换向竹篾帘的长度为150±2m，幅宽为200±5mm。
  7. 根据权利要求1至6中任一项所述的一种用于竹复合综合管廊的直管，其中，所述轴向竹篾帘中的各竹篾片间距在1.0±0.2mm。
  8. 根据权利要求1至7中任一项所述的一种用于竹复合综合管廊的直管，其中，所述环向竹篾帘中的各竹篾片间距在2.0±0.2mm。
  9. 一种竹复合综合管廊，其由权利要求1至8中任一项所述的直管通过连接件依次连接形成。
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CN114227839A (zh) * 2021-12-15 2022-03-25 郎启朋 竹缠绕管廊环形式修整设备

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