CN216193941U - Novel abutment structure - Google Patents
Novel abutment structure Download PDFInfo
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- CN216193941U CN216193941U CN202121853253.5U CN202121853253U CN216193941U CN 216193941 U CN216193941 U CN 216193941U CN 202121853253 U CN202121853253 U CN 202121853253U CN 216193941 U CN216193941 U CN 216193941U
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Abstract
The utility model provides a novel abutment structure, which comprises a road-bridge connecting and supporting structure and a supporting and blocking structure, wherein the road-bridge connecting and supporting structure comprises an abutment body and an abutment cap supported by the abutment body; the supporting structure comprises a post-abutment backfill material, an abutment body, an abutment cap and a back wall which are connected to form the side wall of the post-abutment backfill material, and a supporting abutment back foundation filler and a supporting surface are formed; the table cap comprises a bearing part and an extension section, wherein the bearing part is positioned at the upper end of the table body, the prestressed beam is loaded and installed on the bearing part, the extension section is extended and installed on a backfill material behind the table, a back wall is installed at the upper end of the extension section, and a construction and maintenance channel is reserved between the back wall and the prestressed beam. The utility model provides an abutment structure which can ensure smooth connection between an abutment and a prestressed beam, can provide certain construction and maintenance space and has a simple structure.
Description
Technical Field
The utility model relates to the field of bridge engineering, in particular to a novel abutment structure.
Background
The bridge abutment is positioned at two ends of the full bridge, the front end supports the bridge span, the rear end is connected with the roadbed, and the bridge abutment plays a role in supporting and blocking the back roadbed of the bridge abutment and filling soil in the back roadbed and connecting the bridge span with the roadbed. The existing bridge abutment is roughly divided into four types by the construction form: the first is a gravity type bridge abutment, also called solid type bridge abutment, mainly relies on the dead weight to balance the soil pressure behind the abutment, the abutment body is mostly built by masonry materials such as stone, stone slab concrete, etc., also mostly adopt the construction process of building on the spot, but its engineering load is large, already use less at present; the second kind is reinforced concrete thin-walled abutment, formed by buttress retaining wall and both sides of thin-walled side wall, compare with gravity type abutment, can reduce masonry volume 40% -50%, reduce the pressure to the foundation because of self gravity at the same time, but its structure is complicated, the reinforcing bar consumption is also more, suitable for the bridge built on soft soil foundation; the third is an embedded abutment, the abutment body is embedded in the conical protection slope, only the abutment cap is exposed to place the support and the upper structure, the embedded abutment utilizes the soil pressure generated by the conical slope in front of the abutment to offset the active soil pressure behind the abutment, the stability of the abutment can be increased, the size of the abutment is correspondingly reduced, the conical slope of the embedded abutment has large water retaining area, the water passing area under the bridge hole is compressed, and the river channel is compressed; the fourth is a combined abutment, the abutment is required to bear vertical force and horizontal force transmitted by a bridge span structure, while the earth pressure of the background is borne by other bridge span structures, so that the thrust problem of certain arch bridges is solved, and the combined abutment is applied to soft soil foundations to construct arch bridges, so that the light abutment is realized.
In the prior application, the bridge abutment used by the medium and large span bridges is stable due to the adoption of an embedded bridge abutment, and the medium and large span bridges are convenient to construct, overhaul and use due to the fact that the manhole is required to be arranged on the end cross beam. However, in the existing pre-buried abutment structure, because the prestressed steel beam tensioning space at the beam end is limited, single-end tensioning needs to be used to replace two-end tensioning or the prestressed beam top plate needs to be used when the anchoring end position is adjusted, so that tensioning construction at the prestressed beam end is avoided. Although the arrangement form of the prestressed steel bundles can meet the stress requirement of the structure, single-end tensioning replaces two-end tensioning to influence the prestressed tensioning efficiency, the position of an anchoring end is adjusted to a prestressed beam stirrup and a transverse beam longitudinal rib at the position of a cut-off end on a prestressed beam top plate, and the shearing-resistant bearing capacity of the beam end and the bending-resistant bearing capacity of the transverse beam are reduced. In addition, in the prestressed concrete bridge structure, the prestressed steel bundles should be anchored at the end of the prestressed beam as much as possible according to the stress characteristics and the arrangement requirements of the steel bars.
In addition, the existing commonly used bridge abutment structure form also makes the bridge difficult for workers and equipment to reach the manhole position arranged on the end beam during construction and operation maintenance, and brings great difficulty to construction and maintenance.
How to guarantee the smooth-going connection of abutment and prestressed beam, when realizing carrying out the prestressed anchorage at prestressed beam tip, the abutment structure that realizes having sufficient construction, maintenance space and simple structure simultaneously is the problem that the skilled person in the art needs a urgent need to solve.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel abutment structure aiming at carrying out prestressed anchorage on the end part of a prestressed beam in the prior art.
Therefore, the above purpose of the utility model is realized by the following technical scheme:
a novel abutment structure comprises a road-bridge connecting and supporting structure and a supporting structure, wherein the road-bridge connecting and supporting structure comprises an abutment body and an abutment cap supported by the abutment body; the supporting structure comprises a post-abutment backfill material, an abutment body, an abutment cap and a back wall which are connected to form the side wall of the post-abutment backfill material, and a supporting abutment back foundation filler and a supporting surface are formed; the table cap comprises a bearing part and an extension section, wherein the bearing part is positioned at the upper end of the table body, the prestressed beam is loaded and installed on the bearing part, the extension section is extended and installed on a backfill material behind the table, a back wall is installed at the upper end of the extension section, and a construction and maintenance channel is reserved between the back wall and the prestressed beam.
While adopting the technical scheme, the utility model can also adopt or combine the following technical scheme:
as a preferred technical scheme of the utility model: the width of the table cap from the bearing part to the extending section is the sum of the width of the prestressed beam laid on the bearing part, the width of the construction and overhaul channel and the width of the back wall;
or the top surface of the table cap is provided with a drainage slope towards the midspan direction.
As a preferred technical scheme of the utility model: the back wall supports the butt strap, and the butt strap sets up the bracket at the cantilever end tip towards prestressing force roof beam one end, installs the bridge expansion joint on the bracket.
As a preferred technical scheme of the utility model: the back wall supports the butt strap through the butt strap support, the butt strap support comprises a horizontal limiting rod, a butt strap cushion block and elastic filler, the butt strap cushion block is arranged between the butt strap and the back wall, the horizontal limiting rod is anchored, limited and connected with the butt strap to the back wall, and the elastic filler is filled in a gap between the butt strap and the back wall except the butt strap cushion block;
or concrete is selected to cast in place in partial gaps between the butt strap and the back wall and around the horizontal limiting rod.
Or the horizontal limiting rod is made of ribbed steel bars.
As a preferred technical scheme of the utility model: the end, deviating from the prestressed beam, of the butt strap extends out of the back wall, and the extending length of the butt strap is the difference between the clear distance between the back wall and the end part of the prestressed beam and the installation width of the expansion joint.
As a preferred technical scheme of the utility model: the butt strap extends out of the back wall at one end deviating from the prestressed beam, forms a longitudinal slope at the back of the platform, and is paved with backfill materials at the back of the platform.
As a preferred technical scheme of the utility model: the back wall is stretched out the attachment strap below is laid in proper order attachment strap bed course and bench backfill material, road structure layer, road surface course are laid in proper order to the attachment strap upper end.
As a preferred technical scheme of the utility model: side walls are arranged at two ends of the cross bridge of the table cap, the side walls extend to the width range of the table cap, and manholes are arranged at positions of the side walls corresponding to the construction and maintenance channels;
or, pre-burying a connecting piece at the upper end of the side wall, wherein the connecting piece is used as a base of auxiliary structures such as a guardrail, a lamp post and the like.
As a preferred technical scheme of the utility model: the table body is provided with a back drainage system, the back drainage system comprises a drainage pipe and a geotextile wrapped collection distribution broken stone, and the drainage pipe extends into the geotextile wrapped collection distribution broken stone
The utility model provides a novel abutment structure, which is characterized in that an extension section is added behind an orientation abutment by expanding an abutment cap, under the condition of extremely small change of the abutment structure, the realization of a bridge span supporting function at one end is not influenced, a space is provided for tensioning or anchoring and locking two ends of a prestressed beam end part connected with a road bridge on the abutment cap, a space is reserved for workers and equipment to reach a beam at the end part of the prestressed beam during the construction and operation maintenance of the bridge, the structure improvement function with multiple purposes is realized, the effect of improving the convenience of construction and operation maintenance is realized under the condition of extremely low change cost, and the novel abutment structure has great popularization significance in the aspect of the improvement of the abutment structure.
Drawings
FIG. 1 is a schematic cross-sectional view of an abutment structure of the present invention;
FIG. 2 is a schematic view of the outer elevation of the abutment structure of the present invention;
FIG. 3 is a schematic view of the connection of the strap and the table back of FIG. 1;
in the drawings: a road surface layer 1; a prestressed beam 2; an expansion joint 3; a butt strap 4; a cantilever end 401; a road structure layer 5; a strap mat 6; backfilling materials 7 behind the platform; a strap support 8; a back wall 9; abutment caps 10; a carrier 101; an extension section 102; a post-counter drainage system 11; a platform body 12; a table front floor 13; a prestressed beam support 14; abutment sidewalls 15; a manhole 16; a horizontal limit rod 17; an elastomeric filler 18; a strap mat 19.
Detailed Description
The utility model is described in further detail with reference to the figures and specific embodiments.
The novel abutment structure comprises a road-bridge connecting and supporting structure and a supporting structure, wherein the road-bridge connecting and supporting structure comprises an abutment body 12 and an abutment cap 10 supported by the abutment body 12; the supporting structure comprises a post-abutment backfill material 7, a platform body 12, a platform cap 10 and a back wall 9 which are connected to form the side wall of the post-abutment backfill material 7, so as to form a supporting abutment post-abutment foundation filler and a supporting surface; the bench cap 10 comprises a bearing part 101 and an extension section 102, wherein the bearing part 101 is located at the upper end of the bench body 12, the prestressed beam 2 which is installed by a prestressed beam support (14) in a load mode is arranged on the bearing part 101, the extension section 102 is installed in a backfill material 7 behind the bench in an extension mode, a back wall 9 is installed at the upper end of the extension section 102, and a construction and maintenance channel is reserved between the back wall 9 and the prestressed beam 2.
In the utility model, the bearing part 101 and the extension section 102 facing the rear of the abutment are arranged on the abutment cap 10, the bearing part 101 is arranged on the upper end face of the abutment cap 10 at the upper end of the abutment body 12, so that the bearing installation and support of the prestressed beam 2 are realized, on the basis of not influencing the realization of the function of supporting the bridge span at one end, the enlarged space extension section 102 arranged on the abutment cap 10 provides space for the tensioning or anchoring locking of two ends of the prestressed beam end part connected with the road bridge, and simultaneously reserves space for workers and equipment of the bridge to reach the end beam of the prestressed beam during the construction, operation and maintenance, thereby realizing the structural improvement of one object with multiple purposes. It is worth emphasizing that the existing abutment structure is not required to be greatly changed, the extension section of the abutment cap 10 only needs to be filled with the backfill material 7 laid behind the abutment and laid at the lower part of the rear end, the abutment cap 10 and the back wall 9 are integrated through cast-in-place construction, the space of the abutment cap 10 is only increased a little, the influence on the existing abutment change is extremely small, the change cost is low, and the effect of facilitating construction and operation maintenance is obvious.
The width of the platform cap 10 from the bearing part 101 to the extending section 102 is the sum of the width of the prestressed beam laid on the bearing part 101, the width of a construction and maintenance channel and the width of the back wall 9, and under the condition of changing the existing bridge platform structure, the minimum reduction provides space for the prestressed beam end part connected with the road bridge to be tensioned at two ends or anchored and locked, and simultaneously, the space is reserved for the bridge to reach the prestressed beam end part cross beam by working personnel and equipment during construction and operation maintenance.
The top surface of the table cap 10 is provided with a drainage slope towards the midspan direction, so that the drainage of construction and maintenance channels on the table cap 10 is facilitated.
The back wall 9 supports the butt strap 4, the butt strap 4 is provided with a bracket at the end part of the cantilever end 401 facing one end of the prestressed beam, and the bracket is provided with the bridge expansion joint 3.
The butt strap 4 is used for being connected with a roadbed behind the abutment, and the expansion joint can be reserved conveniently and quickly through the roadbed connection structure, so that the service life of the abutment structure is prolonged, additional structural design is not needed, and construction and application are facilitated.
The back wall 9 supports the attachment strap 4 through the attachment strap support 8, the attachment strap support 8 includes horizontal gag lever post 17, attachment strap cushion 19 and elastic filler 18, the attachment strap cushion 19 sets up between attachment strap 4 and back wall 9, horizontal gag lever post 17 anchor spacing connection attachment strap 4 in back wall 9, elastic filler 18 is filled in except that the remaining clearance of attachment strap cushion 19 between attachment strap 4 and back wall 9, utilizes elastic filler 18, when the supporting, because of elastic filler 18's elastic contact, has slowed down partial compressive stress to back wall 9, has promoted the bearing capacity of back wall 9, has promoted the life of back wall.
Concrete is selected for cast-in-place in a part of gaps between the access plate 4 and the back wall 9 and around the horizontal limiting rod 17, and the horizontal limiting rod 17 is a ribbed steel bar, so that the integral bearing pressure of the supporting tower plate 4 including the back wall 9 is improved.
The end, deviating from the prestressed beam 2, of the butt strap 4 extends out of the back wall 9, and the extending length of the butt strap 4 is the difference between the clear distance between the back wall 9 and the end part of the prestressed beam 2 and the installation width of the expansion joint 3.
The butt strap 4 extends out of the back wall 9 at one end deviated from the prestressed beam 2, forms a longitudinal slope at the back of the platform, and is laid on a backfill material 7 at the back of the platform, the butt strap 4 is in a slope shape of a downward slope at the back of the platform, and the design of the longitudinal slope when an automobile and the like pass through can reduce the shear stress of the back wall 9 due to the downward pressure of lever force, and under the same condition, the bearing capacity of the back wall 9 and the butt strap 4 is increased. Meanwhile, the deformation coordination behind the platform is more reasonable for forming the transition section of the gradual change type roadbed structure.
And (3) paving an access board cushion layer 6 and a post backfill material 7 in sequence below the access board 4 extending out of the back wall 9, and paving a post backfill material 7, a road structure layer 5 and a road surface layer 1 in sequence at the upper end of the access board 4.
The horizontal bridge of platform cap 10 sets up side wall 15 to both ends, side wall 15 extends to platform cap 10 width range, and side wall 15 corresponds construction and overhauls the passageway position and sets up manhole 16, is convenient for construct, overhaul.
The connecting piece is pre-buried at the upper end of the side wall 15 and serves as a base of auxiliary structures such as guardrails and lamp posts.
The platform body sets up drainage system 11 behind the platform, drainage system 11 includes that the gravel is joined in marriage to the collection of drain pipe, geotechnological cloth parcel, and the drain pipe stretches into the collection of geotechnological cloth parcel and joins in marriage the gravel.
The construction process of the abutment is completed by the following construction processes:
s1: a cast-in-place construction abutment body 12 and an abutment cap 10 reach the abutment back wall 9, and a horizontal limiting rod 17 is pre-buried in the back wall 9 in advance;
s2: mounting a prestressed beam support 14 of the prestressed beam 2 on the bearing part 101, erecting or pouring the prestressed beam 2, and completing prestressed tensioning, grouting and anchor sealing procedures;
s3: after removing the topsoil on the ground surface behind the platform, laying a geogrid, backfilling and compacting in a layered mode until the designed elevation of the bottom surface of the butt strap cushion layer 6 is achieved, and pouring the butt strap cushion layer 6;
s4: laying elastic filler 18 on the top of the abutment back wall 9, reserving a space of an abutment cushion block 19, binding an abutment 4 steel bar, pre-burying an expansion joint 3 steel bar, and pouring concrete of the abutment 4 and the abutment cushion block 19 in the same bin;
s5: backfilling the rest part of the post-construction road, and constructing a road structure layer 5 to a designed elevation;
s6: and installing an expansion joint 3 and constructing a road surface layer 1.
Example 1
As shown in fig. 1-3, the novel abutment structure of the utility model comprises an abutment body 12, an abutment cap 10, a back wall 9 and a butt strap 4, which are sequentially arranged above an abutment bearing platform, wherein the abutment cap 10 is provided with side walls 15 at two ends in the transverse direction of the abutment; the abutment cap 10, the back wall 9 and the side wall 15 are cast in situ into a whole through construction joints; a butt strap support 8 is arranged between the abutment back wall 9 and the butt strap 4 and is connected by a horizontal limiting rod 17; the cantilever end part of the butt strap 4 is provided with a bracket, and the bracket is provided with a bridge expansion joint 3; and a back backfill material 7 and a cushion layer are sequentially paved below the back butt strap 4, and the back backfill material 7, the road structure layer 5 and the road surface layer 1 are sequentially paved above the butt strap 4 to the designed elevation.
In the utility model, the abutment cap is provided with a channel, which provides a certain construction space for tensioning the prestressed steel beams;
the abutment cap is provided with a channel, so that a safe and convenient path is provided for passing of maintainers and equipment during operation of the bridge;
the butt strap is provided with a certain slope to form a transition section of a gradual change type roadbed structure, and the deformation coordination behind the platform is more reasonable.
The abutment body 12 is of a reinforced concrete rectangular section structure, the section width is 100cm, and a post-abutment drainage system 11 is arranged.
The post-abutment drainage system 11 is arranged at the abutment body 12 of the abutment and consists of drainage pipes and graded broken stones wrapped by geotextile.
The abutment cap 10 adopts a reinforced concrete rectangular section structure, the section size is 225 multiplied by 70cm, the top surface of the abutment cap 10 is provided with a 2% drainage slope towards the midspan direction, and the clear distance between the abutment back wall 9 and the prestressed beam is 90 cm.
The butt strap support 8 is arranged between the butt strap 4 and the abutment back wall 9, has the height of 2cm, and consists of a horizontal limiting rod 17, a butt strap cushion block 19 and an elastic filler 18.
The horizontal limiting rods 17 are phi 25 ribbed L-shaped steel bars, the distance between the phi 25 ribbed L-shaped steel bars is 50cm, the length of a straight section of each steel bar is 90cm, the length of a right-angle bending section is 20cm, and the depth of a straight section inserted into the abutment back wall 9 is 55 cm.
The butt strap cushion blocks 19 are arranged between the butt strap 4 and the abutment back wall 9 and in partial gaps around the horizontal limiting rod 17, the section size is 10 multiplied by 2cm, the horizontal limiting rod 17 is used as a center, the whole width of the bridge is continuously arranged, and the bridge is formed by cast-in-place concrete.
The elastic filler 18 is a foam plate with the thickness of 2cm and is arranged between the butt strap 4 and the abutment back wall 9 in the residual gap except the butt strap cushion block 19.
The butt strap 4 is arranged on the abutment back wall 9, the length of the end part of the butt strap 4 extending out of the back wall 9 is 65cm, the thickness of the extending part is 60cm, a bracket with the section of 35 multiplied by 27cm is arranged, and the expansion joint 3 steel bars are embedded at the position of the bracket; the thickness of a partial butt strap 4 at the back of the platform is 25cm, the length is 600cm, and the longitudinal direction is 1: 5, slope releasing; the thickness change part adopts 27 multiplied by 27cm chamfer angle transition.
The backfill material 7 after the platform adopts graded good sand gravel, and the maximum grain diameter is not more than 50 mm.
The novel abutment structure construction process comprises the following construction steps:
s1, constructing the abutment structure to the abutment back wall 9, and pre-burying a horizontal limiting rod 17 in the abutment back wall 9 in advance;
s2, installing a prestressed beam support 14 at the center of the abutment body 12, erecting a prestressed beam 2, and completing prestressed tensioning, grouting and anchor sealing procedures;
s3, removing the floating soil 30cm from the ground surface behind the platform, paving a geogrid, backfilling and compacting layer by layer according to the compaction thickness of 20cm until the bottom surface of the butt strap cushion layer 6 is at the designed elevation, and pouring the butt strap cushion layer 6;
s4, laying a foam board on the top of the abutment back wall 9, reserving a space of an abutment cushion block 19, binding reinforcing steel bars of an abutment 4, pre-burying reinforcing steel bars of an expansion joint 3, and pouring concrete of the abutment 4 and the abutment cushion block 19 in the same bin;
s5, backfilling the residual part of the post-backfilling table, and constructing the road structure layer 5 to a designed elevation;
s6, installing the expansion joint 3 and constructing the road surface layer 1.
According to the novel abutment structure, the abutment cap is enlarged, the extension section is additionally arranged behind the abutment, under the condition that the abutment structure is changed minimally, the realization of the function of supporting the bridge span at one end is not influenced, space is provided for the prestressed beam end part connected with the road bridge to stretch or anchor and lock at two ends on the abutment cap, space is reserved for workers and equipment to reach the transverse beam at the end part of the prestressed beam during the construction and operation maintenance of the bridge, the multifunctional structural improvement function is realized, the effect of improving the convenience of construction and operation maintenance is realized under the condition that the change cost is extremely low, and the novel abutment structure has great popularization significance in the aspect of the improvement of the abutment structure.
The above-described embodiments are intended to illustrate the present invention, but not to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit of the present invention and the scope of the claims fall within the scope of the present invention.
Claims (9)
1. A novel abutment structure is characterized in that: the device comprises a road and bridge connecting and supporting structure and a supporting and blocking structure, wherein the road and bridge connecting and supporting structure comprises a platform body (12) and a platform cap (10) supported by the platform body (12); the supporting structure comprises a post-abutment backfill material (7), an abutment body (12) which is connected with the side wall forming the post-abutment backfill material (7), an abutment cap (10) and a back wall (9) to form a supporting abutment post-abutment foundation filler and a supporting surface; the table cap (10) comprises a bearing part (101) and an extending section (102), wherein the bearing part (101) is located at the upper end of a table body (12), the prestressed beam (2) which is installed by a prestressed beam support (14) in a load mode is arranged on the bearing part (101), the extending section (102) extends out and is installed on a backfill material (7) behind the table, a back wall (9) is installed at the upper end of the extending section (102), and a construction and maintenance channel is reserved between the back wall (9) and the prestressed beam (2).
2. The novel abutment structure of claim 1, wherein: the width of the table cap (10) from the bearing part (101) to the extending section (102) is the sum of the width of the prestressed beam laid on the bearing part (101), the width of a construction and overhaul channel and the width of the back wall (9);
or the top surface of the table cap (10) is provided with a drainage slope towards the midspan direction.
3. The novel abutment structure of claim 1, wherein: the back wall (9) supports the butt strap (4), the butt strap (4) is provided with a bracket at the end part of the cantilever end facing one end of the prestressed beam, and the bracket is provided with a bridge expansion joint (3).
4. The novel abutment structure of claim 3, wherein: the back wall (9) supports the butt strap (4) through a butt strap support (8), the butt strap support (8) comprises a horizontal limiting rod (17), a butt strap cushion block (19) and elastic fillers (18), the butt strap cushion block (19) is arranged between the butt strap (4) and the back wall (9), the horizontal limiting rod (17) is anchored and limited to be connected with the butt strap (4) to the back wall (9), and the elastic fillers (18) are filled in a gap between the butt strap (4) and the back wall (9) except for the butt strap cushion block (19);
or concrete is selected to cast in place in partial gaps between the butt strap (4) and the back wall (9) and around the horizontal limiting rod (17);
or the horizontal limiting rod (17) is made of ribbed steel bars.
5. The novel abutment structure of claim 3, wherein: the end, deviating from the prestressed beam (2), of the butt strap (4) extends out of the back wall (9), and the extending length of the butt strap (4) is the difference value between the clear distance between the back wall (9) and the end part of the prestressed beam (2) and the installation width of the expansion joint (3).
6. The novel abutment structure of claim 4, wherein: the butt strap (4) extends out of the back wall (9) at one end of the prestress beam (2), forms a longitudinal slope at the rear part of the platform, and is laid on the backfill material (7) at the rear part of the platform.
7. The novel abutment structure of claim 6, wherein: stretch out back wall (9) strap (4) below is laid in proper order strap bed course (6) and bench back backfill material (7), road structure layer (5), road surface course (1) are laid in proper order to strap (4) upper end.
8. The novel abutment structure of claim 1, wherein: side walls (15) are arranged at two ends of the platform cap (10) in the transverse bridge direction, the side walls (15) extend to the width range of the platform cap (10), and manholes (16) are arranged at the positions, corresponding to construction and maintenance channels, of the side walls (15);
or, pre-buried connecting piece in side wall (15) upper end, the connecting piece is as the base of accessory structures such as guardrail, lamp pole.
9. The novel abutment structure of claim 1, wherein: the table body is provided with a back drainage system (11), the back drainage system (11) is arranged, the drainage system (11) comprises a drainage pipe and a geotextile wrapped aggregate and is provided with gravels, and the drainage pipe stretches into the geotextile wrapped aggregate and is provided with gravels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121853253.5U CN216193941U (en) | 2021-08-10 | 2021-08-10 | Novel abutment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121853253.5U CN216193941U (en) | 2021-08-10 | 2021-08-10 | Novel abutment structure |
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| Publication Number | Publication Date |
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| CN216193941U true CN216193941U (en) | 2022-04-05 |
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