CN112482225A - Arch bridge arch center excavation construction method - Google Patents
Arch bridge arch center excavation construction method Download PDFInfo
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- CN112482225A CN112482225A CN202011279378.1A CN202011279378A CN112482225A CN 112482225 A CN112482225 A CN 112482225A CN 202011279378 A CN202011279378 A CN 202011279378A CN 112482225 A CN112482225 A CN 112482225A
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- 238000010276 construction Methods 0.000 title claims abstract description 52
- 238000009412 basement excavation Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 claims description 20
- 230000002265 prevention Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 14
- 239000004567 concrete Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses an arch bridge arch abutment excavation construction method, which comprises the steps of excavating on a slope surface downwards along the vertical direction to an arch abutment design top elevation position to form a vertical channel, excavating forwards along the arch bridge to an arch abutment rear edge line position at the arch abutment design top elevation position, and continuously excavating forwards to an arch abutment front edge line position according to an arch abutment section to form a longitudinal channel, excavating downwards along the vertical direction to an arch abutment design bottom elevation position at the arch abutment rear edge line position and the arch abutment front edge line position to form an arch abutment channel, and excavating upwards in an inclined direction along an arch ring starting section direction at the arch abutment front edge line position to penetrate through the slope surface to form an inclined channel.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to an arch bridge abutment excavation construction method.
Background
With the rapid development of highway construction industry in China, bridge construction as an important component of highway construction is developed vigorously. The structural form of the bridge generally includes an arch bridge, a suspension bridge, a cable-stayed bridge, a beam slab bridge and the like, wherein the arch bridge is a plurality of bridges. The load of the arch bridge is transferred from the upper structure to the bent, and then transferred to the main arch ring through the bent, and then transferred to the arch center through the main arch ring, and finally transferred to the ground through the arch center. Therefore, the arch base is used as the last relay structure for the stress of the arch bridge and is very important for the whole arch bridge.
In the prior art, open excavation is adopted for excavation construction of an arch support, steps are directly excavated step by step on a slope surface if the excavation is carried out by a full-section step method, soil of each step of the slope surface needs to be completely removed to form the arch support, the excavation volume is large, the construction period is long, and meanwhile, original landforms in an arch bridge area are seriously damaged and do not meet the requirement of environmental protection provided by the state.
Therefore, how to provide an arch bridge abutment excavation construction method which does not damage original topography and landform as much as possible and reduces excavation volume is a problem to be solved by the technical personnel in the field.
Disclosure of Invention
In order to solve the technical problems, the invention provides an arch bridge arch center excavation construction method which can not destroy original topography and landform as much as possible and reduce excavation volume during construction.
The invention provides an arch bridge arch center excavation construction method, which comprises the following steps:
digging the slope surface vertically downwards to the designed top elevation position of the arch support to form a vertical channel;
excavating forwards to the position of the rear edge line of the arch abutment along the longitudinal direction of the arch bridge at the designed top elevation position of the arch abutment, and continuously excavating forwards to the position of the front edge line of the arch abutment according to the section of the arch abutment to form a longitudinal channel;
excavating vertically downwards to the designed bottom elevation position of the arch support at the rear edge line position of the arch support and the front edge line position of the arch support respectively to form an arch support channel;
and excavating obliquely upwards along the starting section direction of the arch ring at the front edge line of the arch base until the slope is penetrated to form an oblique channel.
Preferably, before said digging vertically down the ramp to the dome design top elevation position, forming a vertical channel, the method further comprises:
and carrying out orifice site treatment on the slope surface, and well performing water prevention and drainage and installing a hoisting system.
Preferably, the width of the vertical channel is 2/5-3/5 of the width of the abutment channel.
Preferably, a new Austrian construction process is used in the excavation of the longitudinal channel.
Preferably, the width of the longitudinal channel is 0-1m wider than the width of the abutment channel.
Preferably, when the arch support channel is formed by digging, the arch support channel is dug in two steps.
Preferably, the cross section of the bottom of the inclined channel is rectangular, and the cross section of the top of the inclined channel is rectangular or semicircular.
The arch bridge arch abutment excavation construction method comprises the steps of excavating on a slope surface downwards along the vertical direction to an arch abutment design top elevation position to form a vertical channel, excavating forwards along the arch bridge to an arch abutment rear edge line position at the arch abutment design top elevation position, and continuously excavating forwards to an arch abutment front edge line position according to an arch abutment section to form a longitudinal channel, excavating downwards along the vertical direction to an arch abutment design bottom elevation position at the arch abutment rear edge line position and the arch abutment front edge line position to form an arch abutment channel, and excavating upwards in an inclined mode along the direction of an arch ring starting section at the arch abutment front edge line position to penetrate through the slope surface to form an inclined channel.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a model of a method provided by an embodiment of the invention during excavation construction;
fig. 2 is a schematic model diagram of an arch base obtained by the method provided by the embodiment of the invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of a plurality of or a plurality of is two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for understanding and reading the contents disclosed in the specification, and are not used for limiting the conditions that the present application can implement, so the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the technical content disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a model of a method for excavation according to an embodiment of the present invention; fig. 2 is a schematic model diagram of an arch base obtained by the method provided by the embodiment of the invention.
The arch bridge abutment excavation construction method provided by the embodiment of the invention comprises the following steps:
excavating the slope surface 1 to an arch support design top elevation position 2 along the vertical direction to form a vertical channel 100;
excavating forwards to an arch abutment rear edge line position 3 along the arch bridge at an arch abutment design top elevation position 2, and continuously excavating forwards to an arch abutment front edge line position 4 according to the arch abutment section to form a longitudinal channel 200;
excavating vertically downwards to an arch abutment design bottom elevation position 5 at an arch abutment rear edge line position 3 and an arch abutment front edge line position 4 respectively to form an arch abutment channel 300;
and (4) excavating obliquely upwards along the direction of the starting stage of the arch ring at the front edge line position 4 of the arch base until the slope surface 1 is penetrated to form an oblique channel 400.
In the embodiment of the invention, when the vertical channel 100 is excavated, the vertical downward excavation can be started from the slope 1 close to one side of the approach bridge and at a certain distance behind the arch support, the support is well made, the subsequent construction is convenient, and the vertical channel 100 can be used as a sightseeing channel for visitors to the internal structure of the arch bridge after the construction is finished. The vertical channel 100 is excavated downwards to the designed top elevation position 2 of the arch abutment, and then is longitudinally excavated forwards along the length direction of the arch bridge to the rear edge line position 3 of the arch abutment, and then is continuously excavated forwards to the front edge line position 4 of the arch abutment according to the section of the arch abutment to form a longitudinal channel 200. After the longitudinal channel 200 is excavated, the rear part of the abutment can be excavated vertically downwards from the position 3 of the rear edge line of the abutment and the position 4 of the front edge line of the abutment at the same time, or the rear part of the abutment can be excavated separately from the position 3 of the rear edge line of the abutment or the position 4 of the front edge line of the abutment until the designed bottom elevation position 5 of the abutment is excavated, so that the abutment channel 300 is formed. And finally, excavating obliquely upwards from the position 4 of the front edge line of the arch base along the direction of the arch ring starting section until the slope 1 is excavated to penetrate through, so that an oblique channel 400 is formed. After the excavation construction is finished, hanging a reinforcing mesh in the arch support channel 300 and carrying out concrete spraying construction, so that the arch support 6 of the arch bridge can be obtained by pouring; correspondingly, the reinforcing mesh is hung in the oblique channel 400, concrete spraying construction is carried out, and the arch ring starting section 7 of the arch bridge can be obtained through pouring. During specific implementation, the arch support design top elevation position 2, the arch support trailing edge line position 3, the arch support leading edge line position 4 and the arch support design bottom elevation position 5 can be determined according to design parameters of an arch bridge, and measurement positioning is carried out by measuring personnel.
It can be known from the above that, the arch bridge abutment excavation construction method provided by the embodiment of the invention comprises the steps of excavating on the slope surface vertically downwards to the designed top elevation position of the abutment to form a vertical channel, excavating forwards along the arch bridge to the rear edge line of the arch abutment at the designed top elevation position of the arch abutment, and further excavating forwards to the front edge line of the arch abutment according to the section of the arch abutment to form a longitudinal channel, excavating downwards along the vertical direction to the designed bottom elevation position of the arch abutment at the rear edge line position of the arch abutment and the front edge line position of the arch abutment respectively to form an arch abutment channel, digging obliquely upwards along the starting section direction of the arch ring at the front edge line of the arch base until the slope is penetrated to form an oblique channel, because the whole body adopts a tunnel excavation mode, steps do not need to be excavated step by step on the slope surface and soil is removed, compared with the prior art, the method can not destroy original landform and landform as much as possible, and simultaneously reduce the excavation amount during construction.
Further, on the basis of the above embodiment, before the slope surface 1 is excavated vertically downward to the dome design top elevation position 2 to form the vertical channel 100, the method further comprises: and (4) processing an orifice site on the slope surface 1, and well performing water prevention and drainage and installing a hoisting system.
In the embodiment of the invention, before the vertical channel 100 is excavated, the surface of the slope surface 1 can be cleaned, the hole site treatment can be carried out, the waterproof and drainage work and the installation and hoisting system are well done, the subsequent excavation construction is convenient, and the construction safety is ensured at the same time.
Specifically, based on the above embodiment, the width of the vertical channel 100 is 2/5-3/5 of the width of the archway 300. In the embodiment of the invention, the width of the vertical channel 100 is determined according to the size of the arch support 6, and 2/5-3/5 of the width of the arch support channel 300 is generally taken, so that enough construction space is ensured, and the excavation amount is reduced as much as possible.
Specifically, on the basis of the above embodiment, when the longitudinal passage 200 is excavated, a new construction process is employed. In the embodiment of the invention, a new Austrian tunnel construction process, namely a short name of the new Austrian tunnel construction process, is provided by the Austrian scholars in the 50 s by Labuxiviz teaching, and the construction process is a construction process taking tunnel engineering experience and rock mechanics theory as the basis, combining an anchor rod and sprayed concrete as main support means. The new Austrian method construction process adopts spray anchor support as a main means and can follow the construction of an excavation working face to the maximum extent, so that the space-time effect of the excavation construction face can be utilized to limit the deformation development before support, prevent surrounding rocks from entering a loose state, and can carry out advanced support under necessary conditions, and the early strength and the comprehensive cohesiveness of sprayed concrete ensure the timeliness and the effectiveness of the support.
Specifically, in the embodiment described above, the width of longitudinal channel 200 is 0-1m wider than the width of abutment channel 300. In the embodiment of the invention, in order to facilitate the subsequent excavation construction of the abutment channel 300, the width of the longitudinal channel 200 needs to be greater than the width of the abutment channel 300 by 0-1m, i.e. the distance between the single side line of the longitudinal channel 200 and the side line of the abutment channel 300 is 0-0.5m, so as to leave enough construction space. In specific implementation, the excavation of the longitudinal channel 200 is similar to the tunnel excavation construction, and includes face excavation, slag discharge, preliminary bracing, concrete spraying, and the like.
As an alternative embodiment of the present invention, when the arch support channel 300 is dug, a two-step excavation method is adopted. In the embodiment of the invention, the excavating depth of the arch support channel 300 is determined according to geological conditions, and the arch support channel can be excavated in two steps in the vertical excavating process, wherein the upper step longitudinally extends from the position 3 of the rear edge line of the arch support to the position 4 of the front edge line of the arch support, and the longitudinal excavating length of the lower step can be properly reduced. After the excavation construction of the arch support channel 300 is completed, the steel mesh is hung in the arch support channel 300, concrete spraying construction is carried out, and the stepped arch support 6 can be obtained through pouring.
Specifically, on the basis of the above embodiment, the cross section of the bottom of the inclined channel 400 is rectangular, and the cross section of the top is rectangular or semicircular. In the embodiment of the invention, the portal rectangular inclined channel 400 with the rectangular bottom section and the rectangular top section can be excavated from the front edge line position 4 of the arch center along the direction of the arch ring starting section in an inclined and upward manner, or the inclined channel 400 with the rectangular bottom section and the semicircular top section can be excavated and excavated until the inclined and upward excavation is carried out to penetrate the slope surface 1, and then the construction of the portal of the portal is continuously completed. After the excavation construction of the inclined channel 400 is completed, the reinforcing mesh is hung in the inclined channel 400, concrete spraying construction is carried out, and the arch ring starting section 7 can be obtained through pouring.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. An arch bridge arch center excavation construction method is characterized by comprising the following steps:
digging the slope surface vertically downwards to the designed top elevation position of the arch support to form a vertical channel;
excavating forwards to the position of the rear edge line of the arch abutment along the longitudinal direction of the arch bridge at the designed top elevation position of the arch abutment, and continuously excavating forwards to the position of the front edge line of the arch abutment according to the section of the arch abutment to form a longitudinal channel;
excavating vertically downwards to the designed bottom elevation position of the arch support at the rear edge line position of the arch support and the front edge line position of the arch support respectively to form an arch support channel;
and excavating obliquely upwards along the starting section direction of the arch ring at the front edge line of the arch base until the slope is penetrated to form an oblique channel.
2. The arch bridge arch excavation construction method of claim 1, wherein before the excavation on the sloping surface vertically downward to the designed dome height position of the arch, forming a vertical channel, the method further comprises:
and carrying out orifice site treatment on the slope surface, and well performing water prevention and drainage and installing a hoisting system.
3. The arch bridge arch excavation construction method of claim 1, wherein the width of the vertical channel is 2/5-3/5 of the width of the arch channel.
4. The arch bridge arch center excavation construction method of claim 1, wherein a new Austrian construction process is adopted when the longitudinal channel is excavated.
5. The arch bridge arch excavation construction method of claim 4, wherein the width of the longitudinal channel is 0-1m wider than the width of the arch support channel.
6. The arch bridge arch center excavation construction method according to claim 1, wherein excavation is performed in a manner of excavation in two steps when the arch center passage is excavated.
7. The arch bridge arch excavation construction method of claim 1, wherein the bottom section of the inclined channel is rectangular, and the top section of the inclined channel is rectangular or semicircular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011279378.1A CN112482225B (en) | 2020-11-16 | 2020-11-16 | Arch bridge arch center excavation construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011279378.1A CN112482225B (en) | 2020-11-16 | 2020-11-16 | Arch bridge arch center excavation construction method |
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| CN112482225A true CN112482225A (en) | 2021-03-12 |
| CN112482225B CN112482225B (en) | 2022-08-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605903A (en) * | 2021-08-31 | 2021-11-05 | 四川公路桥梁建设集团有限公司 | Method for quickly, simply and easily excavating and lining new abnormal anchorage tunnel or arch foundation chamber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605903A (en) * | 2021-08-31 | 2021-11-05 | 四川公路桥梁建设集团有限公司 | Method for quickly, simply and easily excavating and lining new abnormal anchorage tunnel or arch foundation chamber |
| CN113605903B (en) * | 2021-08-31 | 2024-04-09 | 四川公路桥梁建设集团有限公司 | Quick, simple and easy-to-operate new excavation and lining method for tunnel or arch base chamber of special anchorage |
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| Publication number | Publication date |
|---|---|
| CN112482225B (en) | 2022-08-26 |
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