Pipe jacking sheet for underground corrosion environment
By introducing basalt fiber mesh and basalt reinforcement into the pipe jacking segments, the problems of easy cracking and steel corrosion of the pipe jacking segments in the underground corrosive environment were solved, achieving the effects of crack resistance and corrosion resistance, and improving durability.
Patent Information
- Application Number
- CN202520525999.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-03-24
AI Technical Summary
Existing pipe jacking segments are prone to cracking in underground corrosive environments, leading to steel corrosion, affecting structural load-bearing capacity and durability, and resulting in high maintenance costs.
Basalt fiber mesh is incorporated into the concrete structure, located on both the water-facing and backwater sides, to enhance crack and corrosion resistance. This is combined with basalt reinforcement to replace some or all of the steel bars, forming a structural reinforcement assembly.
It effectively avoids cracks in the jacking pipe segments, prevents steel corrosion, improves durability, enhances corrosion resistance, and reduces maintenance costs.
Smart Images
Figure CN223676276U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the top -tube piece technical field, specifically related to a top -tube piece for underground corrosion environment. BACKGROUND
[0002] The top pipe is a kind of non-excavation or less excavation construction technology, is often used in underground closed environment municipal water supply and drainage, cable, highway tunnel, pedestrian passageway, subway station entrance and exit etc. engineering project. When top pipe construction, in the working well to the soil excavation track, then, using jacking equipment, the pipe piece is gradually jacked from the working well to the predetermined position, forms the pipeline structure, makes tunnel wall gradually complete. At present, top pipe pipe piece is mostly reinforced concrete prefabricated pipe section component. After top pipe pipe piece installation, the earth pressure, water pressure effect of surrounding is borne, also need to guarantee the stability of working face, can see, the quality of top pipe pipe piece influences the safety of underground engineering.
[0003] The common problem of top pipe concrete pipe piece is crack. The reasons of top pipe concrete pipe piece cracking include the following factors:
[0004] (1) the problem caused by material, such as the concrete strength is too low, concrete mix ratio is unreasonable, pipe section end face is not straight, pipe mouth has honeycomb pockmark etc.;
[0005] (2) the problem caused by geological condition, such as top pipe jacking length is too long, soil pressure is too big etc.;
[0006] (3) the problem caused by construction quality, such as measurement error leads to jacking axis deviation, construction pause frequently etc.
[0007] Top pipe pipe piece crack, not only can influence the structural strength and rigidity of top pipe, lead to its bearing capacity to drop, also can cause pipeline internal liquid or gas leakage, cause damage to surrounding environment. If top pipe pipe piece cracks in the use process, its crack repair difficulty is big, and maintenance cost is high.
[0008] Top pipe cannot implement outer package waterproof layer due to construction technology limitation. And because top pipe pipe piece outer layer concrete is directly contacted with underground water, so when underground water or soil layer has strong corrosiveness, corrosive medium (such as chloride, sulfide etc.) can penetrate into the inside of concrete pipe piece through crack, makes the inside steel bar rust. Pipe piece inner steel bar rust, can influence the bearing capacity and durability of structure, easily causes safety problem. In underground engineering, top pipe pipe piece is often subjected to the action of huge pressure of underground water, when the steel bar in top pipe pipe piece concrete rusts too seriously, top pipe pipe piece can appear crack, breakage etc. phenomenon, there is huge safety risk.
[0009] Therefore, developing a new type of pipe segment for underground corrosion environment to effectively avoid the generation of pipe segment cracks, to effectively prevent the corrosion of steel bars due to water entering through cracks, and to effectively improve the durability of pipe segment is an urgent problem to be solved in the field.
[0010] At present, a new technology is needed to solve the problem of lack of a new type of pipe segment for underground corrosion environment in the prior art. Practical new type content
[0011] To solve the above problems in the prior art, the utility model provides a pipe segment for underground corrosion environment, which can effectively avoid the generation of pipe segment cracks and improve the durability of pipe segment.
[0012] The utility model adopts the following technical scheme:
[0013] A pipe segment for underground corrosion environment, comprising a concrete structure, a structural reinforcement assembly and a fiber grid body, wherein the structural reinforcement assembly is arranged in the concrete structure, the structural reinforcement assembly comprises a water-facing side ring-shaped reinforcement and a backwater side ring-shaped reinforcement, a first fiber grid body is arranged in the concrete structure near the water-facing side ring-shaped reinforcement, and a second fiber grid body is arranged in the concrete structure near the backwater side ring-shaped reinforcement.
[0014] Further, the fiber grid body is a basalt fiber grid body.
[0015] Further, the fiber grid body has a plurality of grid holes for the passage of mortar aggregates during pouring, the length of the grid hole is 50mm-100mm, and the width of the grid hole is 50mm-100mm.
[0016] Further, the hole body thickness of the grid hole is 3mm.
[0017] Further, the first fiber grid body is fixed outside the water-facing side ring-shaped reinforcement through a cement pad, and the second fiber grid body is fixed outside the backwater side ring-shaped reinforcement through a cement pad.
[0018] Further, the first fiber grid body and the water-facing side ring-shaped reinforcement maintain a spacing of at least 30mm, and the second fiber grid body and the backwater side ring-shaped reinforcement maintain a spacing of at least 30mm.
[0019] Further, the first fiber grid body and the water-facing side of the concrete structure maintain a protective layer thickness of at least 30mm, and the second fiber grid body and the backwater side of the concrete structure maintain a protective layer thickness of at least 30mm.
[0020] Further, the structural rib assembly further comprises a water-facing longitudinal rib, a water-backing longitudinal rib and a pull rib, the water-facing longitudinal rib is arranged on the water-facing ring rib, the water-backing longitudinal rib is arranged on the water-backing ring rib, one end of the pull rib is connected with the water-facing longitudinal rib and the water-facing ring rib, and the other end of the pull rib is connected with the water-backing longitudinal rib and the water-backing ring rib, and the water-facing ring rib, the water-facing longitudinal rib, the water-backing ring rib, the water-backing longitudinal rib and the pull rib are all embedded in the concrete structure.
[0021] Further, one or more of the water-facing ring rib, the water-facing longitudinal rib, the water-backing ring rib, the water-backing longitudinal rib and the pull rib is a basalt rib.
[0022] Further, the concrete structure is distributed with a basalt fiber body.
[0023] Compared with the prior art, the utility model has the advantages that:
[0024] The utility model discloses a pipe piece for underground corrosion environment, which is characterized by the following technical scheme: a first fiber grid body is arranged in the concrete structure of the pipe piece and located on the water-facing side, and a second fiber grid body is arranged in the concrete structure and located on the water-backing side.
[0025] The utility model discloses a pipe piece for underground corrosion environment, which can effectively avoid the generation of cracks in the pipe piece, effectively prevent the corrosion of steel bars due to water entering through the cracks and improve the durability of the pipe piece. BRIEF DESCRIPTION OF DRAWINGS
[0026] The utility model will be further and specifically explained in connection with the drawings and embodiments:
[0027] Figure 1 is a cross section schematic view of the utility model "a pipe piece for underground corrosion environment" (the first embodiment);
[0028] Figure 2 is Figure 1 is a sectional view of the pipe piece at M-M;
[0029] Figure 3 is a cross section schematic view of the utility model "a pipe piece for underground corrosion environment" (the second embodiment);
[0030] Figure 4 is Figure 3A sectional view of the pipe section at N-N.
[0031] Reference signs:
[0032] 1 - pipe section; M-M - section symbol; N-N - section symbol;
[0033] 2 - concrete structure; A - water side; B - land side;
[0034] 3 - structural reinforcement assembly; 31 - water side hoop; G - direction outside the water side hoop; 32 - water side longitudinal reinforcement; 33 - land side hoop; H - direction outside the land side hoop; 34 - land side longitudinal reinforcement; 35 - tie bar;
[0035] 4 - fiber mesh; C - spacing; D - spacing; E - protective layer thickness; F - protective layer thickness;
[0036] 5 - basalt fiber body. DETAILED DESCRIPTION
[0037] The concept, specific structure and technical effects of the present application will be described clearly and completely in combination with the embodiments and the drawings, so as to fully understand the purpose, scheme and effects of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The same reference signs used in the drawings indicate the same or similar parts.
[0038] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right and other descriptions used in the present application are only relative to the mutual positional relationship of the components of the present application in the drawings.
[0039] Reference Figure 1 and Figure 2 (or reference Figure 3 and Figure 4 ), a pipe section 1 for underground corrosion environment, comprising a concrete structure 2, a structural reinforcement assembly 3, a fiber mesh 4; the structural reinforcement assembly 3 is arranged in the concrete structure 2, the structural reinforcement assembly 3 comprises a water side hoop 31 and a land side hoop 33; close to the water side hoop 31, the first fiber mesh 4 is arranged in the concrete structure 2; close to the land side hoop 33, the second fiber mesh 4 is arranged in the concrete structure 2.
[0040] Reference Figure 1 and Figure 2 (or reference Figure 3 andFigure 4 In one embodiment, the fiber mesh 4 is a basalt fiber mesh, wherein the tensile strength of the basalt fiber mesh is not less than 1500 MPa, the elastic modulus is not less than 30 GPa, and the elongation is 2%.
[0041] In one embodiment, the fiber mesh 4 has a plurality of mesh holes for mortar aggregate to pass through during concrete pouring; the mesh holes are square mesh holes; the length of the mesh holes is 50mm to 100mm; the width of the mesh holes is 50mm to 100mm; thus, an appropriate mesh hole size can be selected according to the actual situation.
[0042] In one embodiment, the thickness of the mesh hole is 3 mm.
[0043] In one embodiment, the length of the mesh hole is 50mm, the width is 50mm, and the thickness of the hole body is 3mm.
[0044] In another embodiment, the mesh hole has a length of 100mm, a width of 100mm, and a hole thickness of 3mm.
[0045] Reference Figure 1 and Figure 2 (or refer to) Figure 3 and Figure 4 In one embodiment, the first fiber mesh 4 is fixed to the outer side of the water-facing circumferential reinforcement 31 by a cement pad (here, "outer side" refers to...). Figure 1 or Figure 3 (The G in the text is for illustrative purposes only); the second fiber mesh 4 is fixed to the outside of the circumferential reinforcement 33 on the backwater side by a cement pad (here, "outside" refers to...). Figure 1 or Figure 3 (Understand the H in the text).
[0046] Reference Figure 1 and Figure 2 In one embodiment, the first fiber mesh 4 maintains a distance of at least 30 mm from the water-facing circumferential rib 31 (see reference). Figure 1 and Figure 2 (C is indicated in the diagram); the second fiber mesh 4 maintains a distance of at least 30 mm from the backwater-side circumferential reinforcement 33 (refer to...). Figure 1 and Figure 2 (D is indicated in the diagram).
[0047] Reference Figure 1 and Figure 2 In one embodiment, the first fiber mesh 4 maintains a protective layer thickness of at least 30 mm with the water-facing side A of the concrete structure 2 (refer to...). Figure 1 andFigure 2 E in FIG. 4 illustrates); the second, the fiber grid body 4 and the concrete structure 2 backside B keep at least 30 mm of protective layer thickness (refer to Figure 1 and Figure 2 F in FIG. 4 illustrates).
[0048] Refer to Figure 1 and Figure 2 (or refer to Figure 3 and Figure 4 ), in an embodiment, the structural reinforcement assembly 3 also includes the water side longitudinal reinforcement 32, the backwater side longitudinal reinforcement 34 and the tie bar 35, the water side longitudinal reinforcement 32 is arranged on the water side ring reinforcement 31;The backwater side longitudinal reinforcement 34 is arranged on the backwater side ring reinforcement 33;The tie bar 35 is connected to the water side longitudinal reinforcement 32 and the water side ring reinforcement 31 at one end, and is connected to the backwater side longitudinal reinforcement 34 and the backwater side ring reinforcement 33 at the other end;The water side ring reinforcement 31, the water side longitudinal reinforcement 32, the backwater side ring reinforcement 33, the backwater side longitudinal reinforcement 34 and the tie bar 35 are all embedded in the concrete structure 2.
[0049] Refer to Figure 1 and Figure 2 (or refer to Figure 3 and Figure 4 ), in an embodiment, one or more of the water side ring reinforcement 31, the water side longitudinal reinforcement 32, the backwater side ring reinforcement 33, the backwater side longitudinal reinforcement 34 and the tie bar 35 can still be steel bars.
[0050] Refer to Figure 1 and Figure 2 (or refer to Figure 3 and Figure 4 ), preferably, one or more of the water side ring reinforcement 31, the water side longitudinal reinforcement 32, the backwater side ring reinforcement 33, the backwater side longitudinal reinforcement 34 and the tie bar 35 are basalt bars;The basalt bar is made of basalt fiber as the main reinforcing material, combined with a synthetic resin matrix, and made by pultrusion process. The basalt bars used in the utility model can further avoid the corrosion problem of steel bars by replacing the steel bars used in the past.
[0051] Refer to Figure 3 and Figure 4, preferably, the basalt fiber body 5 is distributed in the concrete structure 2, which can further improve the crack resistance and impermeability of the concrete structure 2, and is beneficial to avoid the corrosion problem caused by the use of steel fibers. Wherein, the basalt fiber body is made of natural basalt as raw material, and is made into a fiber body after high temperature melting. Wherein, the basalt fiber body (non-metallic, inorganic fiber body) has the characteristics of high tensile strength, light weight, electrical insulation, corrosion resistance and aging resistance, and is green and environmentally friendly. The utility model sets up the basalt fiber grid body and the basalt fiber body 5 in the concrete structure 2 of the pipe segment 1, which is beneficial to reduce the occurrence and development of concrete cracks, effectively prevent the corrosion of crack water seepage to the internal steel bars, and thereby enhance the crack resistance and corrosion resistance of the pipe segment 1.
[0052] In one embodiment, the manufacturing method of the utility model "a pipe segment for underground corrosion environment" comprises the following steps:
[0053] S1, basalt fiber grid body processing; after the continuous basalt fiber raw silk is twisted into basalt fiber yarn, it is woven into a basalt fiber grid body, then surface coating treatment is carried out, and drying is carried out;
[0054] S2, structure reinforcement assembly processing; the "water side ring-shaped muscle, water side longitudinal muscle, backwater side ring-shaped muscle, backwater side longitudinal muscle, tension muscle" are connected into shape;
[0055] S3, basalt fiber grid body positioning; the first basalt fiber grid body is positioned on the outside of the water side ring-shaped muscle through the cement pad, and the clear distance between the first basalt fiber grid body and the water side ring-shaped muscle is not less than 30mm; similarly, the second basalt fiber grid body is positioned on the outside of the backwater side ring-shaped muscle through the cement pad, and the clear distance between the second basalt fiber grid body and the backwater side ring-shaped muscle is not less than 30mm;
[0056] S4, concrete mixing; cement, blast furnace slag, powder medium ash and other materials are mixed into concrete according to engineering use requirements and conditions; the "water-binder ratio" and the amount of cementitious materials should meet the various indexes of concrete required by structure design; wherein, when the concrete needs to be mixed with basalt fiber body, the volume fraction of basalt fiber body is 1% to 4% (that is, the volume percentage of basalt fiber body in unit volume of concrete), and the basalt fiber body is uniformly distributed in the concrete during the stirring process;
[0057] S5, install the mold for pouring;
[0058] S6, concrete pouring and vibration; before pouring concrete, the positioning and stability of the basalt fiber grid body need to be checked again; during pouring and vibration, the basalt fiber grid body should be avoided from being directly impacted and damaged; during pouring, the method of layered pouring is adopted; during vibration, attention should be paid to the intensity and position; if deformation, displacement and other problems of the basalt fiber grid body are observed during the process, the problems should be handled in time;
[0059] S7, demolding and curing; after the pipe segment is demolded, the production date, number and other marks are printed on the position where the pipe segment is easily observed; immediately after demolding and before curing, cement slurry is applied to the surface to make the surface dense, smooth and flat without damage;
[0060] S8, finally, a new pipe segment is obtained.
[0061] Other contents of the pipe segment for underground corrosion environment according to the utility model are referred to the prior art, and will not be described here.
[0062] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form, so any modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model, which does not deviate from the technical scheme content of the utility model, still belongs to the range of the technical scheme of the utility model.
Claims
1. A pipe segment for use in a buried corrosive environment, characterized in that The application relates to a concrete structure, a structural reinforcement assembly and a fiber mesh body; the structural reinforcement assembly is arranged in the concrete structure and comprises a water-facing ring-shaped reinforcement and a backwater-facing ring-shaped reinforcement; a first fiber mesh body is arranged in the concrete structure near the water-facing ring-shaped reinforcement; and a second fiber mesh body is arranged in the concrete structure near the backwater-facing ring-shaped reinforcement.
2. A pipe segment for use in a buried corrosive environment according to claim 1, characterized in that The fiber mesh body is a basalt fiber mesh body.
3. A pipe segment for use in a buried corrosive environment according to claim 1, wherein The fiber mesh body has a plurality of mesh holes for allowing mortar aggregates to pass through during pouring; the length of the mesh holes is 50-100 mm; and the width of the mesh holes is 50-100 mm.
4. A pipe segment for use in a buried corrosive environment according to claim 3, wherein The thickness of the mesh holes is 3 mm.
5. A pipe segment for use in a buried corrosive environment according to claim 1, wherein The first fiber mesh body is fixed to the outside of the water-facing ring-shaped reinforcement through a cement pad; and the second fiber mesh body is fixed to the outside of the backwater-facing ring-shaped reinforcement through a cement pad.
6. A pipe segment for use in a buried corrosive environment according to claim 5, wherein The first fiber mesh body is kept at a distance of at least 30 mm from the water-facing ring-shaped reinforcement; and the second fiber mesh body is kept at a distance of at least 30 mm from the backwater-facing ring-shaped reinforcement.
7. A pipe segment for use in a buried corrosive environment according to claim 5, wherein The first fiber mesh body is kept at a protective layer thickness of at least 30 mm on the water-facing side of the concrete structure; and the second fiber mesh body is kept at a protective layer thickness of at least 30 mm on the backwater-facing side of the concrete structure.
8. A pipe segment for use in a buried corrosive environment according to claim 1, wherein The structural reinforcement assembly further comprises a water-facing longitudinal reinforcement, a backwater-facing longitudinal reinforcement and a tie bar; the water-facing longitudinal reinforcement is arranged on the water-facing ring-shaped reinforcement; the backwater-facing longitudinal reinforcement is arranged on the backwater-facing ring-shaped reinforcement; one end of the tie bar is connected to the water-facing longitudinal reinforcement and the water-facing ring-shaped reinforcement, and the other end of the tie bar is connected to the backwater-facing longitudinal reinforcement and the backwater-facing ring-shaped reinforcement; and the water-facing ring-shaped reinforcement, the water-facing longitudinal reinforcement, the backwater-facing ring-shaped reinforcement, the backwater-facing longitudinal reinforcement and the tie bar are all embedded in the concrete structure.
9. A pipe segment for use in a buried corrosive environment according to claim 8, wherein One or more of the water-facing ring-shaped reinforcement, the water-facing longitudinal reinforcement, the backwater-facing ring-shaped reinforcement, the backwater-facing longitudinal reinforcement and the tie bar is a basalt reinforcement.
10. A pipe segment for underground corrosive environments according to any one of claims 1 to 9, characterized in that The concrete structure is distributed with basalt fiber bodies.