CN211849592U - Immersed tube template supporting cushion block - Google Patents
Immersed tube template supporting cushion block Download PDFInfo
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- CN211849592U CN211849592U CN202020458052.4U CN202020458052U CN211849592U CN 211849592 U CN211849592 U CN 211849592U CN 202020458052 U CN202020458052 U CN 202020458052U CN 211849592 U CN211849592 U CN 211849592U
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Abstract
The utility model relates to the technical field of immersed tube tunnel construction, in particular to an immersed tube template supporting cushion block which is used for being arranged between a steel bar cage and a pouring template and comprises a template surface facing one side of the template and a steel bar surface facing one side of the steel bar cage, the distance between the template surface and the steel bar surface corresponds to the thickness of a concrete protective layer of the immersed tube, the cushion block is arranged and installed between the steel bar and the pouring template, one side of the cushion block faces the template, the opposite side faces the steel bar, and the distance between the two sides corresponds to the thickness of the concrete protective layer of the immersed tube at the position, so that a gap is formed between the steel bar of the steel bar cage and the template, when the immersed tube is poured, the gap is filled with concrete and forms the concrete protective layer, the steel bar cage is isolated from the outside, the main structure of the immersed tube is protected from corrosion, thereby having, the durability is improved.
Description
Technical Field
The utility model relates to a immersed tube tunnel construction technical field, especially a immersed tube template lip block.
Background
The immersed tube is a main component for building the underwater tunnel, and is usually manufactured on a slipway or in a dry dock in advance, the immersed tube is finished, then the underwater foundation is processed, and finally the immersed tube is installed on the processed foundation, so that the underwater tunnel is built and the traffic is realized.
Usually, the design life of the underwater tunnel is more than 100 years, and some are even higher. The durability of the immersed tube structure is not only related to the normal use of the underwater tunnel, but also directly affects the maintenance and operation cost of the next hundred years, and is also directly related to the life and property safety of people, so that how to design the immersed tube structure becomes the most important subject. Among many factors considered when designing the immersed tube, the durability, waterproof performance and corrosion resistance of the immersed tube become the most important aspects, the cross section structure of the immersed tube is mainly divided into a steel shell concrete tube section and a reinforced concrete tube section according to manufacturing materials, the steel shell concrete tube section is a combined structure of a steel shell and concrete and has a single layer structure and a double layer structure, the outer layer of the single layer steel shell tube section is a steel plate, the inner layer is a reinforced concrete ring, the inner layer and the outer layer of the double layer steel shell tube section are both steel shells, concrete is poured between the inner side and the outer side, the problem of large steel consumption exists no matter the single layer steel shell tube section or the double layer steel shell tube section, and the corrosion resistance of the steel shell is not easy to solve because the shell directly contacts with the external environment; the central part of the reinforced concrete pipe section in the thickness direction of each part of the immersed tube is provided with a reinforcement cage, the inner side and the outer side of the reinforcement cage are respectively provided with a pouring template, a certain gap is formed between the pouring template and the reinforcement cage, after the concrete pouring is finished, the central part is provided with concrete with the reinforcement cage, plain concrete is arranged between the reinforcement cage and the template, and the plain concrete serves as an inner layer and an outer layer to protect the reinforcement cage structure, so that a concrete protective layer is formed. Because the reinforced concrete pipe section does not need the steel shell to be waterproof, but utilizes the concrete protective layer of the inner layer and the outer layer to be waterproof and protected, and some reinforced concrete immersed pipes are also specially covered with a waterproof layer, the key step in the construction process is that how to effectively control the thickness of the protective layer.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: aiming at the problem that the thickness of a concrete protective layer is difficult to control by adopting a reinforced concrete pipe section in the prior art, the support cushion block for the immersed tube template is provided, the cushion block is arranged between a reinforced bar structure and a pouring template, and the thickness of the concrete protective layer can be effectively controlled by the support cushion block for the immersed tube template, so that the immersed tube has good corrosion resistance in the using process, and the immersed tube is ensured to have better durability and corrosion resistance.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides a immersed tube template lip block for arrange between steel reinforcement cage and pouring template, include the template face towards template one side and the reinforcing bar face towards steel reinforcement cage one side, distance between template face and the reinforcing bar face corresponds with the thickness of immersed tube concrete inoxidizing coating.
Adopt immersed tube template supporting cushion, the cushion arranges and installs between reinforcing bar and pouring template, one side of cushion is towards the template, relative one side is towards the reinforcing bar, and the distance between these both sides is corresponding with the thickness of this immersed tube concrete inoxidizing coating, make to form the clearance between the reinforcing bar of steel reinforcement cage and the template, when pouring the immersed tube, this clearance within range packs the concrete and forms the concrete inoxidizing coating, make steel reinforcement cage and external isolation, protect immersed tube major structure to avoid corroding, thereby have good corrosion resisting property, and the durability is improved.
As the utility model discloses an optimal scheme, offer on the immersed tube template supporting cushion and be used for pricking the hole that the silk passed and ligature on the reinforcing bar.
Through arranging the holes on the supporting cushion blocks, the binding wires penetrate through the holes and then are bound on the reinforcement cage, so that the supporting cushion blocks are fixed on the reinforcement cage, and the situation that the supporting cushion blocks at partial positions cannot be placed due to no compression is avoided.
As a preferred embodiment of the present invention, the holes are disposed on the non-template surface. Therefore, the condition that the binding wires leak outside after the template is removed can be effectively avoided, the appearance of the immersed tube is ensured to be attractive, and meanwhile, the impermeability of the immersed tube is improved because the binding wires are immersed in concrete.
As the utility model discloses an optimal scheme, immersed tube template supporting pad includes first cushion and second cushion, first cushion is used for installing between bottom plate steel reinforcement cage and exterior sheathing, just first cushion still is used for installing between the interior sheathing of roof steel reinforcement cage and roof department, the second cushion is used for installing between wall body steel reinforcement cage and pouring the template.
The immersed tube structure includes bottom plate, roof and wall body, the wall body includes the side wall of both sides and middle two sides middle wall, two sides middle wall respectively with form the lane corridor between the side wall of left and right sides, corridor in forming between the two sides middle wall, arrange first cushion between the steel reinforcement cage of bottom plate and the bottom plate exterior sheathing, also arrange first cushion between the steel reinforcement cage of roof and the roof inner formword, between the side wall steel reinforcement cage of left and right sides and the side wall template, all arrange the second cushion between the two sides middle wall steel reinforcement cage of centre and the both sides template of middle wall, the structure of first cushion and second cushion is different, first cushion needs the pressure-bearing, adopts the structure that bearing capacity is stronger, the pressure that the second cushion need bear is less, adopts the structure that bearing capacity is relatively more weak but other performances are better.
The position of difference adopts the cushion of different structural style, can sink the controllable concrete inoxidizing coating of pipe ectonexine formation thickness, also can correspond at the position of difference and set up the cushion of different thickness to form the concrete inoxidizing coating of different thickness, in addition, adopt the cushion of different structural style, make the structure of cushion correspond with the steel reinforcement cage structure at different positions, further improve the performance of immersed tube.
As a preferable aspect of the present invention, the first cushion block is a square cushion block, a ratio of a width to a height of the square cushion block is not more than 3:2, and a ratio of a length to a width of the square cushion block is not more than 2: 1.
Because between bottom plate steel reinforcement cage and the exterior sheathing to and need bear the weight of steel reinforcement cage between roof reinforcing bar and the roof centre form, consequently, require the structural style of first cushion can bear great pressure, adopt the square cushion of above-mentioned structural style, can effectively guarantee the bearing capacity of square cushion, and under great pressure effect, first cushion can not destroyed.
As a preferable scheme of the present invention, the second cushion block is an elongated cushion block, a ratio of a width to a height of the elongated cushion block is not greater than 1:1, and a ratio of the length to the width is not less than 2: 1.
Because the wall body reinforcement cage and the wall body template do not need to bear too large pressure, the pressure bearing between the side wall and the inner template (the lane gallery template), between the side wall and the outer template, between the middle wall and the middle gallery template and between the middle wall and the lane gallery template is small, the thickness of the concrete protective layer can be ensured by adopting the strip-shaped cushion block with the structure, meanwhile, the length of the second cushion block is larger than the width of two adjacent reinforcing steel bars, when the second cushion block is installed, the second cushion block at least spans two reinforcing steel bars in the length direction, and the installation stability of the second cushion block is improved.
As the preferred scheme of the utility model, the template face of second cushion is the wave.
Because the second cushion bearing is less, set up the template face into the wave and also can satisfy the pressure-bearing requirement, set up the template face into the wave simultaneously, the concrete can flow into other depressed parts except the crest for after the form removal, the place of installing the second cushion only sees the lip block line, and does not have the transversal joint that leads to the steel reinforcement cage, has both reduced the influence to the concrete outward appearance, has also increased immersed tube concrete's prevention of seepage permeability.
As a preferable aspect of the present invention, the second pad is disposed to be inclined. The transverse ribs and the longitudinal ribs of the immersed tube reinforcement cage are mutually vertically bound and arranged, and the inclined arrangement means that the transverse ribs and the longitudinal ribs are arranged at certain included angles along the axis of the second cushion block in the length direction.
As the preferred scheme of the utility model, the height of the immersed tube template supporting cushion block is 30-100 mm.
The thickness of the concrete protective layer at different positions of the immersed tube is different, the thickness of the concrete protective layer at the inner layer is smaller than that of the concrete protective layer at the outer layer, the thickness of the concrete protective layer at the water-facing side of the side wall is larger than that of the concrete protective layer at the water-backing side of the side wall, and the height of the immersed tube template supporting cushion blocks at different positions corresponds to the thickness of the concrete protective layer, so that the immersed tube template supporting cushion blocks are a series of cushion blocks with different heights, and the performance and the economic cost of the immersed tube are both considered.
As the preferred scheme of the utility model, immersed tube template supporting cushion is the concrete cushion that intensity and concrete protective layer are equivalent.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the method comprises the following steps that a immersed tube template is adopted to support a cushion block, the cushion block is arranged and installed between a steel bar and a pouring template, one side of the cushion block faces the template, the opposite side of the cushion block faces the steel bar, and the distance between the two sides corresponds to the thickness of a concrete protective layer of the immersed tube at the position, so that a gap is formed between the steel bar of a steel bar cage and the template, when the immersed tube is poured, the gap is filled with concrete and forms the concrete protective layer, the steel bar cage is isolated from the outside, the main structure of the immersed tube is protected from being corroded, and therefore the immersed tube template has;
2. the holes are formed in the supporting cushion blocks, the binding wires penetrate through the holes and then are bound to the reinforcement cage, so that the supporting cushion blocks are fixed on the reinforcement cage, and the situation that the supporting cushion blocks at partial positions cannot be placed due to no compression is avoided;
3. set up the template face into wave structural style, can not only satisfy the pressure-bearing requirement at low pressure-bearing position, set up the template face into the wave back moreover, the concrete can flow into other depressed parts except the crest for after the form removal, the place of installing the second cushion only sees the lip block line, and does not have the transversal joint that leads to the steel reinforcement cage, has both reduced the influence to the concrete outward appearance, has also increased immersed tube concrete's prevention of seepage permeability.
Drawings
Fig. 1 is a schematic structural view of the immersed tube template cushion block arranged in the immersed tube.
Fig. 2 is a schematic structural view of a support block (first block) of the sinking tube template in example 2.
Fig. 3 is a left side view of the first head block of fig. 2.
Fig. 4 is a schematic structural view of a support block (second block) of the sinking tube template in example 3.
Fig. 5 is a left side view of the second head block of fig. 4.
Fig. 6 is a cross-sectional view taken along line I-I in fig. 1.
The labels in the figure are: 1-reinforcement cage, 1 a-reinforcement, 11-bottom plate reinforcement cage, 12-top plate reinforcement cage, 13-side wall reinforcement cage, 131-transverse bar, 132-longitudinal bar, 14-middle wall reinforcement cage, 2-pouring template, 21-outer template, 22-inner template, 23-middle gallery template, 3-immersed tube template supporting cushion block, 3A-first cushion block, 3B-second cushion block, 3A-template surface, 3B-reinforcement surface, 31-hole, A-lane gallery and B-middle gallery.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
The embodiment discloses a support cushion block of a immersed tube template, which is used for forming a concrete protective layer on an inner layer and an outer layer in the immersed tube pouring process.
As shown in fig. 1, the sinking pipe includes a central layer using a steel reinforcement cage 1 as a framework and inner and outer layers at two sides of the central layer, the reinforced concrete using the steel reinforcement cage 1 as the framework is located at the central portion of each portion of the sinking pipe in the thickness direction, the embodiment is described by a three-chamber sinking pipe structure formed by two driveway galleries a and a middle gallery B, the two wider galleries at the left and right of the sinking pipe are driveway galleries a mainly used for driving, the narrower gallery at the middle is the middle gallery B mainly used for arranging road accessories, the three-chamber sinking pipe structure is divided into a bottom plate, a top plate, left and right side walls and a middle wall, correspondingly, the steel reinforcement cage structure is also divided into a bottom plate steel reinforcement cage 11, a top plate steel reinforcement cage 12, a side wall steel reinforcement cage 13 and a middle wall steel reinforcement cage 14, two sides of the steel reinforcement cage at each portion are correspondingly provided with pouring formworks 2, as shown in fig. 1, an outer, the inner form 22 is the form disposed in the lane corridor a, in this embodiment, the bottom plate portion of the lane is not provided with the inner form, and the casting form at each position is also provided with other auxiliary structures for supporting and moving the form at the position, which are not shown in the drawings since they are not related to the protection object of the present application.
The main structure part with the steel reinforcement cage forms reinforced concrete, a certain gap is formed between the steel reinforcement cage 1 and the pouring template 2, after the concrete pouring is finished, the gap part forms a concrete protective layer which takes plain concrete as a main part, in order to improve the structure and the service performance of the immersed tube, some immersed tubes are also specially coated with other protective layers such as a waterproof layer and the like on the concrete protective layer, in order to effectively control the thickness of the concrete protective layer, an immersed tube template supporting cushion block 3 is arranged between the steel reinforcement cage 1 and the pouring template 2, the immersed tube template supporting cushion block 3 comprises a template surface 3a facing one side of the pouring template 2 and a steel bar surface 3b facing one side of the steel reinforcement cage 1, and the distance between the template surface 3a and the steel bar surface 3b corresponds to the thickness of the immersed tube concrete protective layer.
In general, the immersed tube formwork supporting cushion block 3 can be fixed by using the clamping force between the reinforcement cage 1 and the casting formwork 2, but in the practical application process, due to construction errors, some parts may have the situation that the immersed tube formwork supporting cushion block 3 cannot be fixed, so that the preferable embodiment is as follows: as shown in fig. 2 to 5, the sinking tube formwork supporting pad 3 is provided with a hole 31, and when the sinking tube formwork supporting pad 3 is installed, a binding wire is used to penetrate through the hole 31 and bind the hole to the steel bar 1a of the steel bar cage 1.
More preferably, the holes 31 are formed in the non-formwork surface, and after the pouring formwork is removed, the cushion block surface with the holes and the binding wires are immersed in the concrete, so that the formwork surface of the cushion block is clean and tidy.
As shown in fig. 1 and 6, a plurality of immersed tube formwork support cushion blocks are arranged between the reinforcement cage of the immersed tube and the pouring formwork, the whole immersed tube formwork support cushion blocks are arranged in a quincunx structure, and the distance between two adjacent immersed tube formwork support cushion blocks in the transverse direction and the longitudinal direction is about 1.5 meters.
Example 2
The embodiment provides a support cushion block of a immersed tube template with strong bearing capacity, such as a first cushion block 3A shown in figures 1-3, the cushion block with the structural form is used for being arranged at a position needing to bear the weight of a reinforcement cage, and comprises a position between a bottom plate reinforcement cage 11 and an outer template 21, and a position between a top plate reinforcement cage 12 and an inner template 22, because the support cushion blocks at the two positions need to bear the weight of the reinforcement cage, the requirement on the bearing capacity of the support cushion block is relatively higher, the first cushion block 3A is a square cushion block, the ratio of the width to the height of the square cushion block is not more than 3:2, and the ratio of the length to the width is not more than 2:1, the length, the width and the height of the first cushion block 3A in the embodiment are respectively 60mm, 50mm and 40mm, holes 31 are arranged on two surfaces running through the length direction and the height direction of the first cushion block 3A, and are bound on a reinforcement bar 1a, it is also possible to make holes in the height direction (i.e., in the formwork surface 3A and the reinforcement surface 3b which are located opposite to each other), preferably in both surfaces in the length direction of the first spacer 3A.
Example 3
The embodiment provides a support cushion block 3 of a immersed tube formwork with smaller bearing capacity and more stable installation, such as a second cushion block 3B shown in fig. 1, 4 and 5, the support cushion block with the structural form is used for being arranged at a position which does not need to bear the weight of a reinforcement cage, namely, a position which is arranged between a wall reinforcement cage and a formwork, and comprises a position between two side wall reinforcement cages 13 and an inner formwork 22, a position between two middle wall reinforcement cages 14 and the inner formwork 22 and a position between the middle wall reinforcement cage 14 and a middle gallery formwork 23.
The template surface 3a of the second cushion block 3B can adopt a plane structure, and can also preferably adopt a wave curved surface structure, when the template surface 3a of the second cushion block 3B is wave-shaped, the heights of a plurality of wave crests are equal, and because the pressure bearing of the second cushion block 3B is small, when the wave-shaped template surface 3a structure is adopted, the second cushion block 3B can meet the stress requirement, and concrete can flow into other sunken parts except the wave crests in the pouring process, so that the rest parts of the second cushion block 3B are immersed in the concrete except the narrow line parts of the wave crests, and the seepage-proofing performance of the immersed tube is improved.
The second cushion block 3B is a strip-shaped cushion block, the ratio of the width to the height of the strip-shaped cushion block is not more than 1:1, and the ratio of the length to the width is not less than 2:1, when the template surface 3a of the second cushion block 3B is wavy, the height of the strip-shaped cushion block is the vertical distance from the wave crest to the steel bar surface 3B, the height range of the immersed tube template supporting cushion block 3 is between 30 and 100mm, it should be particularly noted that the height of the immersed tube template supporting cushion block can be selected according to the thickness of the concrete protection layer designed at each part, and the immersed tube template supporting cushion block can comprise a plurality of cushion blocks with different thickness specifications, for example, the thickness of the second cushion block 3B at the water-facing side is 100, the thickness of the water-backing side is 30, and the width and the length of the second cushion block are correspondingly adjusted, in the strip-shaped cushion block of the embodiment, that is, the, 35mm and 50 mm.
The second cushion block 3B of this embodiment is obliquely arranged, and the relative position between the side wall reinforcement cage 13 and the second cushion block 3B is taken as an example for explanation, the transverse rib 131 of the side wall reinforcement cage 13 is parallel to the immersed tube bottom plate, the longitudinal rib 132 is perpendicular to the immersed tube bottom plate, the axis along the length direction of the second cushion block 3B is parallel to the side wall plane, and forms a certain included angle with the immersed tube bottom plate.
The material of the immersed tube template supporting cushion block 3 is preferably a concrete cushion block, other materials with the strength equivalent to that of the poured concrete can be selected, but the immersed tube template supporting cushion block is required to have better integration with the poured concrete, and the position where the immersed tube template supporting cushion block is arranged is ensured to have good anti-permeability performance.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a immersed tube template lip block (3), its characterized in that for arrange between steel reinforcement cage (1) and pouring template (2), include template face (3 a) towards pouring template (2) one side and steel reinforcement face (3 b) towards steel reinforcement cage (1) one side, distance between template face (3 a) and the steel reinforcement face (3 b) corresponds with the thickness of immersed tube concrete inoxidizing coating.
2. The immersed tube formwork supporting cushion block (3) according to claim 1, wherein the immersed tube formwork supporting cushion block (3) is provided with a hole (31) for a binding wire to pass through and be bound on the steel bar (1 a).
3. The sinking template shoe (3) according to claim 2, wherein the holes (31) are arranged on a non-template face.
4. The caisson formwork spacer block (3) according to any of claims 1 to 3, wherein the caisson formwork spacer block (3) comprises a first block (3A) and a second block (3B), the first block (3A) being adapted to be mounted between the floor reinforcement cage (11) and the outer formwork (21), and the first block (3A) being further adapted to be mounted between the roof reinforcement cage (12) and the inner formwork (22) at the roof, the second block (3B) being adapted to be mounted between the wall reinforcement cage and the casting formwork (2).
5. The caisson formwork support block (3) according to claim 4, wherein the first block (3A) is a square block having a width to height ratio not greater than 3:2 and a length to width ratio not greater than 2: 1.
6. The sinking template shoe (3) according to claim 4, wherein the second shoe (3B) is an elongated shoe having a width to height ratio of no more than 1:1 and a length to width ratio of no less than 2: 1.
7. The sinking template shoe (3) according to claim 4, wherein the template face (3 a) of the second shoe (3B) is wave-shaped.
8. The sinking template shoe (3) according to claim 6, wherein the second shoe (3B) is arranged obliquely.
9. The sinking template shoe (3) according to any of claims 5-8, wherein the height of the sinking template shoe (3) is 30-100 mm.
10. The sinking template shoe (3) according to claim 1, wherein the sinking template shoe (3) is a concrete shoe having a strength comparable to a concrete blanket.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020458052.4U CN211849592U (en) | 2020-04-01 | 2020-04-01 | Immersed tube template supporting cushion block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020458052.4U CN211849592U (en) | 2020-04-01 | 2020-04-01 | Immersed tube template supporting cushion block |
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| CN211849592U true CN211849592U (en) | 2020-11-03 |
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| CN202020458052.4U Active CN211849592U (en) | 2020-04-01 | 2020-04-01 | Immersed tube template supporting cushion block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112536911A (en) * | 2020-11-25 | 2021-03-23 | 中铁大桥局上海工程有限公司 | Integral construction method for bridge prefabricated stand column |
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2020
- 2020-04-01 CN CN202020458052.4U patent/CN211849592U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112536911A (en) * | 2020-11-25 | 2021-03-23 | 中铁大桥局上海工程有限公司 | Integral construction method for bridge prefabricated stand column |
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