CN111851188A - Rib beam type closed cutting U-shaped groove structure - Google Patents
Rib beam type closed cutting U-shaped groove structure Download PDFInfo
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- CN111851188A CN111851188A CN202010781090.8A CN202010781090A CN111851188A CN 111851188 A CN111851188 A CN 111851188A CN 202010781090 A CN202010781090 A CN 202010781090A CN 111851188 A CN111851188 A CN 111851188A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 24
- 239000004567 concrete Substances 0.000 claims abstract description 16
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 10
- 230000002787 reinforcement Effects 0.000 claims description 23
- 230000000694 effects Effects 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000010410 layer Substances 0.000 description 12
- 238000009826 distribution Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 230000003014 reinforcing effect Effects 0.000 description 9
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 7
- 239000002689 soil Substances 0.000 description 6
- 238000007667 floating Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
Abstract
A rib beam type closed cutting U-shaped groove structure comprises side walls, a bottom plate, a counterweight pavement layer and a pavement structure; the side wall is provided with a vertical side wall rib beam, the bottom plate is provided with a horizontal bottom plate rib beam, and the side wall rib beam and two ends of the bottom plate rib beam are integrally connected to form a U-shaped rib beam; the plurality of U-shaped rib beams are parallel and equidistantly arranged in the direction vertical to the center line of the road; the side walls and the bottom plate are thin plates, and the thickness of the side walls and the thickness of the bottom plate are both thinner than that of the side wall rib beams and that of the bottom plate rib beams; the side wall connects each side wall rib beam and the bottom plate connects each bottom plate rib beam into an integral structure; the U-shaped rib beam, the side walls and the bottom plate are cast by concrete to form a closed reinforced concrete integral structure. The invention achieves the double reduction effect of the consumption of concrete and steel bars, and provides a technical method for the scheme of controlling the elevation of the foundation close to important and risk source structures.
Description
Technical Field
The invention relates to the technical field of closed cutting building engineering, and particularly provides a rib beam type closed cutting U-shaped groove structure which is suitable for cutting sections with high underground water level and belongs to a closed cutting U-shaped groove structure.
Background
The existing closed cutting U-shaped groove structure is an integral structure consisting of a reinforced concrete bottom plate and side wall plates, and the self-weight of the structural bottom plate, the side wall plates, pavement and other accessory facilities is utilized to resist the supporting and floating effect of underground water. The mode that prior art adopted increase structure bottom plate, side wall plate thickness to offset buoyancy on the surface of underground water and soil and water pressure effect influence usually, and increase bottom plate thickness leads to the basement elevation to descend, causes the further increase of buoyancy on the surface of underground water and soil and water pressure, and technical engineering volume is big, with high costs, material utilization is low, and deep cutting section is especially obvious. Therefore, a solution is needed.
Disclosure of Invention
The invention provides a rib beam type closed cutting U-shaped groove structure, and aims to solve the technical problem that the elevation of a base is reduced due to the fact that the thickness of a bottom plate is increased in a cutting section with a high underground water level, and buoyancy and water and soil pressure on the underground water are further increased.
The invention is realized by the following technical scheme:
a rib beam type closed cutting U-shaped groove structure comprises side walls, a bottom plate, a counterweight pavement layer and a pavement structure; the side wall is provided with a vertical side wall rib beam, the bottom plate is provided with a horizontal bottom plate rib beam, and the side wall rib beam and two ends of the bottom plate rib beam are integrally connected to form a U-shaped rib beam; the plurality of U-shaped rib beams are arranged in parallel at equal intervals in a direction perpendicular to the center line of the road; the side wall and the bottom plate are thin plates, and the thicknesses of the side wall and the bottom plate are both thinner than those of the side wall rib beam and the bottom plate rib beam; the side wall connects each side wall rib beam and the bottom plate connects each bottom plate rib beam into an integral structure; the bottom plate bottom surface with bottom plate rib roof beam bottom surface parallel and level, the side wall medial surface with the side parallel and level of road one side of side wall rib roof beam, the side wall bottom surface is connected the bottom plate seals U type groove structure both sides, U type rib roof beam with side wall, bottom plate constitute for confined reinforced concrete overall structure through concrete placement U type groove structure.
The bottom plate rib beam and the upper part of the bottom plate are upwards sequentially provided with the counterweight pavement layer and the pavement structure.
The transverse width of the bottom plate is at least not less than the width of the U-shaped rib beam; the height of the side wall is at least not less than that of the side wall rib beam.
The bottom plate rib beam is in a strip shape, the thickness of the bottom plate rib beam is increased upwards when the thickness of the bottom plate rib beam is adjusted, and the width of the bottom plate rib beam is increased towards the front side and the rear side when the width of the bottom plate rib beam is adjusted; the side wall rib beam is in a plate strip shape, the outer flange of the side wall rib beam is gradually widened from top to bottom, the width of the side wall rib beam is increased towards the outer side when the width is adjusted, and the thickness of the side wall rib beam is increased towards the front side and the rear side when the thickness is adjusted.
The U-shaped rib beams are reinforced by adopting beam type reinforcing bars according to main stress components, the side walls and the bottom plate bodies are reinforced by common waterproof plates, and the reinforcing bar rate of the side walls and the bottom plate bodies is lower than that of the U-shaped rib beams.
ADVANTAGEOUS EFFECTS OF INVENTION
Compared with a thick plate U-shaped groove structure under the same engineering conditions, the invention obtains the double-reduction effect of the consumption of concrete and reinforcing steel bars and provides a technical method for controlling the elevation scheme of the foundation for structures close to important and risk sources. When the height of the bottom plate rib beam is increased due to stress requirements, the bottom plate rib beam can be adjusted only in the counterweight pavement layer, the height is increased from the substrate to the pavement structure direction, the further increase of external load caused by the reduction of the height of the substrate is not needed, and the boundary condition in the optimization process is stable; the space outside the rib beam is used for applying a counterweight, so that the consumption of concrete is reduced; meanwhile, the excavation depth of the foundation pit can be reduced, and the construction difficulty and the influence on adjacent structures are reduced.
Drawings
FIG. 1 is a three-dimensional schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic illustration of the rib reinforcement of the present invention;
FIG. 4 is a schematic view of the reinforcement of the panel wall according to the present invention;
FIG. 5 is a schematic structural diagram of an engineering example of the present invention;
FIG. 6 is a schematic diagram of a structure at a lower water level according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a structure at a higher water level according to an embodiment of the present invention;
description of the figure numbering: 1-bottom plate rib beam, 2-side wall rib beam, 3-bottom plate, 4-side wall, 5-counterweight pavement layer, 6-pavement structure, 7-low middle wall, 8-motor vehicle lane, 9-non-motor vehicle lane, 10-pedestrian path, U-shaped rib beam 100 and U-shaped groove structure 200. 101-bottom plate rib beam lower edge tension main rib, 102-bottom plate rib beam upper edge tension or compression reinforcing steel bar, 103-bottom plate rib beam side wall distribution reinforcing steel bar, 104-bottom plate rib beam closed hoop, 201-side wall rib beam outer edge tension main rib, 202-side wall rib beam inner edge tension or compression reinforcing steel bar, 203-side wall rib beam side wall distribution reinforcing steel bar, 204-side wall rib beam closed hoop, 301-bottom plate transverse stress main rib, 302-bottom plate longitudinal distribution reinforcing steel bar, 303-bottom plate hanging rib, 401-side wall plate transverse stress main rib, 402-side wall plate longitudinal distribution reinforcing steel bar and 403-side wall plate hanging rib.
Referring to fig. 1 and 2, the rib beam type closed cutting U-shaped groove structure of the invention comprises a side wall, a bottom plate, a counterweight pavement layer 5 and a pavement structure 6; the side wall 4 is provided with a vertical side wall rib beam 2, the bottom plate 3 is provided with a horizontal bottom plate rib beam 1, and the side wall rib beam 2 and the two ends of the bottom plate rib beam 1 are integrally connected to form a U-shaped rib beam 100; the plurality of U-shaped rib beams 100 are arranged in parallel at equal intervals in a direction perpendicular to the center line of the road; the side wall 4 and the bottom plate 3 are thin plates, and the thicknesses of the thin plates are thinner than those of the side wall rib beam 2 and the bottom plate rib beam 1; the side wall 4 connects each side wall rib beam 2 and the bottom plate 3 connects each bottom plate rib beam 1 into an integral structure; the bottom plate bottom surface with bottom plate rib roof beam bottom surface parallel and level, the side wall medial surface with the side parallel and level of the road one side of side wall rib roof beam, the side wall bottom surface is connected the bottom plate seals U type groove structure both sides, U type rib roof beam with side wall, bottom plate constitute for confined reinforced concrete overall structure through concrete placement U type groove structure 200.
The upper parts of the bottom plate rib beam 1 and the bottom plate 3 are upwards sequentially provided with the counterweight pavement layer 5 and the pavement structure 6.
The transverse width of the bottom plate 3 is at least not less than the width of the U-shaped rib beam 100; the height of the side wall 4 is at least not less than that of the side wall rib beam 2.
The bottom plate rib beam 1 is in a strip shape, the thickness of the bottom plate rib beam is increased upwards when the thickness of the bottom plate rib beam is adjusted, and the width of the bottom plate rib beam is increased towards the front side and the rear side when the width of the bottom plate rib beam is adjusted; the side wall rib beam is in a plate strip shape, the outer flange of the side wall rib beam is gradually widened from top to bottom, the width of the side wall rib beam 2 is increased towards the outer side when the width is adjusted, and the thickness of the side wall rib beam is increased towards the front side and the rear side when the thickness is adjusted.
The U-shaped rib beam 100 adopts beam type reinforcement according to a main stress component, the side wall 4 and the bottom plate body 3 are reinforced according to a common waterproof plate, and the reinforcement ratio of the side wall and the bottom plate body is lower than that of the U-shaped rib beam.
The invention is further illustrated below:
1. materials: the bottom plate rib beam, the side wall plate and the bottom plate are all of reinforced concrete structures.
2. The reinforcing mode of the bottom plate rib beam and the side wall rib beam is stress member beam type reinforcing, and the longitudinal reinforcing steel bar of the rib beam is as follows: the lower edge tension main rib 101 of the bottom plate rib beam, the upper edge tension or compression reinforcing steel bar 102 of the bottom plate rib beam, the side wall distribution reinforcing steel bar 103 of the bottom plate rib beam, the outer edge tension main rib 201 of the side wall rib beam, the inner edge tension or compression reinforcing steel bar 202 of the side wall rib beam and the side wall distribution reinforcing steel bar 203 of the side wall rib beam are arranged in parallel with the edge of the structure and transversely along the section of the road. Tension main rib: the lower edge of the bottom plate rib beam is provided with a main tension rib 101, the outer edge of the side wall rib beam is provided with a main tension rib 201, the lower edge of the bottom plate rib beam and the outer edge of the side wall rib beam are provided with main tension ribs, and the continuous through-length steel bars are connected by welding or mechanical sleeve buckling. The upper edge of a bottom plate rib beam and the inner edge of a side wall rib beam are provided with longitudinal tension or compression reinforcing steel bars, the upper edge of the bottom plate rib beam is provided with tension or compression reinforcing steel bars 102, the inner edge of the side wall rib beam is provided with tension or compression reinforcing steel bars 202, the side wall of the rib beam is provided with longitudinal distribution reinforcing steel bars, the side wall rib beam is provided with side wall distribution reinforcing steel bars 103 and side wall rib beam distribution reinforcing steel bars 203, the side wall rib beam longitudinal distribution reinforcing steel bars 202 and 203 are arranged to the top bottom of the rib beam in parallel with the outer edge of the rib beam, and the longitudinal reinforcing steel; the closed stirrups 104 and 204 are arranged in the cross section direction of the rib beam, and the stirrups are positioned on the outer sides of the longitudinal steel bars of the rib beam.
3. The reinforcing rib mode of the side wall plate and the bottom plate is plate type reinforcing rib: stress main reinforcements 301 and 401 which are parallel to the edges of the plates and are arranged in the range of the side wall plates and the bottom plates among the rib beams and are arranged along the cross section direction of the road are arranged, the bottom plate main reinforcements are arranged at the upper edge and the lower edge, the side wall plate main reinforcements are arranged at the inner edge and the outer edge, the main reinforcements are arranged on the outer layer, the inner layer is provided with through-length distributed reinforcements 302 and 402 which are arranged along the longitudinal direction of the road, and the stress main reinforcements 301 and 401 and the distributed reinforcements 302 and 402 in; the hanging ribs 303, 403 are provided in the direction perpendicular to the thickness direction.
4. The shape of the rib beam is as follows: the bottom plate rib beam is vertical to the bottom plate and is unfolded into a rectangular section, and is arranged at the same height and length of the bottom plate along the transverse direction of the road until reaching the inner edge line of the side wall plate; the side wall rib beam is vertical to the side wall and is unfolded into a rectangular section, and the side wall is continuously arranged in a height-increasing mode along the transverse direction of the road, is arranged at a position 50cm away from the top end of the side wall plate, and is arranged at the bottom plate; because of adopting concrete monolithic pouring, there is not boundary gap between bottom plate gird, side wall board, the bottom plate, realize respective function through the difference of arrangement of reinforcement, wherein the gird is whole continuous structure, and the both sides side wall board is the bottom plate gird with the bottom plate scope gird definition, and the both sides side wall board is the side wall gird with the external gird definition.
5. The connection structure is as follows: concrete among the bottom plate rib beam, the side wall plate and the bottom plate has no gap, and after the erection of the reinforcing steel bars is finished, the concrete is integrally poured; the rib beam steel bars are continuously arranged with the main tension bars at the outer edge of the side wall rib beam through the main tension bars at the lower edge of the bottom plate rib beam, and the steel bars at the upper edge of the bottom plate rib beam and the distributed steel bars at the two sides are deeply embedded into the side wall rib beam and the anchoring length is ensured, so that an integral rib beam stress member is formed; bottom plate, side wall board form whole steel reinforcement framework through vertically setting up logical long distribution reinforcing bar along the road with the rib roof beam, and whole closure after concreting.
6. The preparation method comprises the following steps: erecting binding bottom plate reinforcing steel bars, bottom plate rib beam reinforcing steel bars, side wall rib beam reinforcing steel bars and side wall plate reinforcing steel bars from bottom to top on site, and integrally pouring concrete after the reinforcing steel bars are erected.
7. The counterweight structure: the anti-floating structure is divided into three parts of a structure dead weight, an outer soil weight and a counterweight structure, wherein the structure dead weight is the dead weight of reinforced concrete structures such as a bottom plate, a bottom plate rib beam, a side wall plate and a side wall rib beam, the outer soil weight is the dead weight of backfill soil above the outer bottom plate of the side wall, and the counterweight structure is an engineering material which is above the bottom plate in the side wall and meets the requirements of road base surface layer materials.
8. Height adjustment of the rib beam: indicate the U groove structure rib height adjustment that different cutting degree of depth of same engineering corresponds, be relative design process, if dark cutting department rib roof beam sets up the height and is higher than shallow cutting department, this part height is adjusted in counter weight structural layer, need not to reduce bottom plate elevation and forms the bottom plate wrong platform. The heights of the bottom plate rib beams of different sections of the same project are determined after calculation according to actual boundary conditions, and the heights can not be adjusted after construction is finished.
The invention has invented the U-shaped groove structure with rib beams on the bottom plate and side walls, and the rib beams are connected into an integral closed structure by arranging thinner plate bodies between the rib beams, so as to replace the traditional U-shaped groove form with equal height and thick plate, reduce the material consumption of structural concrete and steel bar, save the construction cost, and simultaneously avoid the excessive reduction of the base height, and has good effect in the high-program control of the base near important and risk source structures.
The invention is composed of a bottom plate rib beam, a side wall rib beam, a bottom plate and a side wall, wherein a main stress frame is formed and the integral rigidity of the structure is ensured by arranging the transverse bottom plate rib beam and the side wall rib beam which are vertical to the central line direction of a road, and the rib beams are connected through the bottom plate and the side wall plate to form an integrally closed U-shaped structure.
The rib beam type closed cutting U-shaped groove structure can be used for calculating and determining the structural size, the longitudinal distance and the combination form of the bottom plate rib beam and the side wall rib beam according to engineering practices such as cutting design depth, cutting width, field and natural conditions in a traditional calculation method, and is wide in application range. The rib beam type U-shaped groove structure takes a rib beam as a main stress component, and when the external load action changes, the structure stress requirements are adapted in a mode of adjusting the height, the width, the reinforcement ratio, the longitudinal spacing and the like of the rib beam, and the thickness of the integral component plate of the longitudinal section does not need to be increased.
Application examples
The main road of a certain city is made to pass through a ground railway (not shown in the figure) in a downward-penetrating mode, a longitudinal section low point of the road is arranged at the intersection position of the railway, the underground water level of a project planning field is high, the elevation of an anti-floating water-proof level is close to the ground surface, the structural design needs to solve the problems of structural stress and anti-floating at the same time, the downward-penetrating position is implemented by a railway department according to a closed frame structure, and the main road of the city is designed to be connected with the main road in a U-. The main road red line width is 60m, the bidirectional motor way 8, the non-motor way 9 and the pedestrian path 10 are arranged, the characteristic of wide road width is shown in figure 5, the effect influence of water buoyancy on the transverse bending moment of the bottom plate is further aggravated, a thicker plate body needs to be arranged in the prior art, and the consumption of reinforced concrete is larger. In the process of engineering construction, the structural form of the rib beam type closed cutting U-shaped groove obviously reduces the consumption of structural reinforced concrete materials, and compared with the prior art, the invention reduces the whole consumption of concrete by 43.8 percent, the whole consumption of reinforcing steel bars by 21.4 percent, the reinforcement ratio of the bottom plate and the side wall plate body is 0.6 percent and the reinforcement ratio of the rib beam body is 1.1 percent through the calculation and comparison of the structures of U-shaped grooves with the same length section near a railway (not shown in the figure). According to the contrast above, the setting up of rib makes the structural concrete volume reduce by a wide margin, under the prerequisite that satisfies structure bending resistance, shearing atress demand, the rib rate of reinforcement improves, and the plate body rate of reinforcement reduces, and the reinforcing bar is whole to be used the quantity and descends, and total reinforcing bar reduction rate is less than total concrete reduction rate.
The invention is characterized in that U-shaped ribbed beams arranged at intervals replace the U-shaped plates in the prior art to bear stress, the U-shaped ribbed beams are main stress components of the structure, and the section size, the space and the reinforcement ratio of the ribbed beams can be adjusted according to stress requirements. For two engineering comparison conditions of the same embedding depth in different water level areas and the different embedding depths in the same water level area, the underground water level has difference values from the structural bottom height, and when the height difference is increased, the adjustment can be carried out by reducing the arrangement distance of the rib beams, increasing the width of the rib beams, keeping the bottom height unchanged, heightening the rib beams upwards, and changing the height into a figure 6, and then changing the figure 7, improving the rib beam reinforcement ratio and the like. By applying the method disclosed by the embodiment of the invention, the base elevation is not lower than the base elevation of the railway culvert during construction and construction through adjustment of parameters such as the width, the height, the spacing, the reinforcement ratio and the like of the rib beam, so that the influence of the excavation of the base of the structure on the foundation of the railway structure in the current condition and the scale of the enclosure structure related to the excavation depth are reduced. Meanwhile, the application of the invention achieves the effect of double reduction of the using amount of the stressed member concrete and the reinforcing steel bar, the reduction of the dead weight of the part is complemented by the material of the counterweight pavement layer to meet the counterweight requirement of the anti-floating design, the counterweight pavement layer adopts the engineering material meeting the requirement of the road base material, and the material price of the counterweight pavement layer is lower than that of the reinforced concrete structure. In conclusion, the invention is applied to the foundation of ensuring the service performance of the U-shaped groove structure, and achieves the effects of reducing the engineering quantity, reducing the construction cost and the like.
Claims (5)
1. A rib beam type closed cutting U-shaped groove structure comprises side walls, a bottom plate, a counterweight pavement layer and a pavement structure; the side wall structure is characterized in that the side wall (4) is provided with a vertically arranged side wall rib beam (2), the bottom plate (3) is provided with a horizontal bottom plate rib beam (1), and the side wall rib beam and two ends of the bottom plate rib beam are integrally connected to form a U-shaped rib beam (100); the plurality of U-shaped rib beams are arranged in parallel at equal intervals in a direction perpendicular to the center line of the road; the side wall and the bottom plate are thin plates, and the thicknesses of the side wall and the bottom plate are both thinner than those of the side wall rib beam and the bottom plate rib beam; the side wall connects each side wall rib beam and the bottom plate connects each bottom plate rib beam into an integral structure; the bottom plate bottom surface with bottom plate rib roof beam bottom surface parallel and level, the side wall medial surface with the side parallel and level of the road one side of side wall rib roof beam, the side wall bottom surface is connected the bottom plate seals U type groove structure both sides, U type rib roof beam with side wall, bottom plate constitute for confined reinforced concrete overall structure through concrete placement U type groove structure (200).
2. The rib beam type closed cutting U-shaped groove structure as claimed in claim 1, wherein the upper parts of the bottom plate rib beam (1) and the bottom plate (3) are sequentially provided with the counterweight pavement layer (5) and the pavement structure (6) upwards.
3. The ribbed beam-type closed cut U-shaped channel structure as claimed in claim 1, wherein the transverse width of said floor is at least not less than the width of said U-shaped rib; the height of the side wall is at least not less than that of the side wall rib beam.
4. The rib beam type closed cutting U-shaped groove structure as claimed in claim 1, wherein the bottom plate rib beam is in a plate strip shape, the thickness of the bottom plate rib beam is increased upwards when the thickness is adjusted, and the width of the bottom plate rib beam is increased towards the front side and the rear side when the width is adjusted; the side wall rib beam is in a plate strip shape, the outer flange of the side wall rib beam is gradually widened from top to bottom, the width of the side wall rib beam is increased towards the outer side when the width is adjusted, and the thickness of the side wall rib beam is increased towards the front side and the rear side when the thickness is adjusted.
5. The structure of a rib beam type closed cutting U-shaped groove as claimed in claim 1, wherein the U-shaped rib beam adopts beam type reinforcement according to main stress components, the side wall and the bottom plate body are reinforced according to common waterproof plates, and the reinforcement rate of the side wall and the bottom plate body is lower than that of the U-shaped rib beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010781090.8A CN111851188A (en) | 2020-08-06 | 2020-08-06 | Rib beam type closed cutting U-shaped groove structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010781090.8A CN111851188A (en) | 2020-08-06 | 2020-08-06 | Rib beam type closed cutting U-shaped groove structure |
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| CN111851188A true CN111851188A (en) | 2020-10-30 |
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| CN202010781090.8A Pending CN111851188A (en) | 2020-08-06 | 2020-08-06 | Rib beam type closed cutting U-shaped groove structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182755A (en) * | 2021-12-20 | 2022-03-15 | 广州市市政工程机械施工有限公司 | Open-cut tunnel with iron-sand-containing counterweight layer and construction method thereof |
-
2020
- 2020-08-06 CN CN202010781090.8A patent/CN111851188A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182755A (en) * | 2021-12-20 | 2022-03-15 | 广州市市政工程机械施工有限公司 | Open-cut tunnel with iron-sand-containing counterweight layer and construction method thereof |
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