CN110965488A - Novel reverse construction method assembly type non-pressure culvert and construction method thereof - Google Patents
Novel reverse construction method assembly type non-pressure culvert and construction method thereof Download PDFInfo
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- CN110965488A CN110965488A CN201911338410.6A CN201911338410A CN110965488A CN 110965488 A CN110965488 A CN 110965488A CN 201911338410 A CN201911338410 A CN 201911338410A CN 110965488 A CN110965488 A CN 110965488A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
- E02D29/055—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench further excavation of the cross-section proceeding underneath an already installed part of the structure, e.g. the roof of a tunnel
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention relates to the technical field of building construction, in particular to a novel reverse construction method assembly type non-pressure culvert. The prestressed precast pile side wall structure comprises a prestressed precast pile side wall, an upper top plate and a lower bottom plate; the prestressed precast pile side wall is formed by precast piles arranged side by side, a pile head steel plate is pre-embedded in a pile head of the precast pile, and the pile head steel plate is welded with a stressed steel bar in the upper top plate; the lower part of precast pile is provided with the keyway, set up pre-buried steel sheet in the keyway, pre-buried steel sheet and the inside atress reinforcing bar of precast pile are connected, and the reservation has mechanical connector on the pre-buried steel sheet, mechanical connector is connected with the atress reinforcing bar of bottom plate. The structure has definite stress, strong integral stability, no need of basic treatment and small sedimentation amount.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a novel reverse construction method assembly type non-pressure culvert and a construction method thereof.
Background
In recent years, with the increasing of the comprehensive national force of China and the increasing of the government investment in the aspects of various infrastructures, important building material research and development and the like, the infrastructure construction of industries such as municipal administration, water conservancy and the like in China realizes the rapid development of a crossing type. The culvert is a common structural type in municipal roads, railway engineering and hydraulic engineering and occupies a large proportion in engineering construction. According to statistics of relevant data, the number of culvert projects in China accounts for 60% -70% of the total number of infrastructure construction, 1-3 seats per kilometer in plain areas on average, and 4-6 seats per kilometer in mountain and hilly areas on average; the cost of culvert engineering accounts for about 40% of the total investment. Conventional culverts may be divided into various types according to various standards. For example, the concrete culvert can be divided into a brick culvert, a stone culvert, a concrete culvert and a reinforced concrete culvert according to building materials; according to the internal structure, the pipe culvert, arch culvert, cover plate culvert and box culvert can be divided. According to the filling condition, the method can be divided into open culverts and dark culverts. It can be divided into non-pressure culvert, semi-pressure culvert and pressure culvert according to the water conservancy characteristics.
At present, various conventional culvert structural types in China mostly adopt cast-in-place integral type, and the construction method is mostly open cut construction. The traditional culvert has the defects of large excavation amount, large influence by geological conditions (most of foundations need to be treated), poor structural overall stability, difficult compaction of backfill on two sides of the culvert, difficult control of main body settlement amount and the like in practical application. Meanwhile, the construction operation has large influence on the surrounding environment, the construction period is long, and the construction cost is high. The culvert structure and the construction method are used for years in the field of engineering construction in China for a long time, are not beneficial to national industrial policies and future development directions of green buildings, and are at the end of the life cycle. Therefore, it becomes important to find more economical and applicable alternative schemes for culvert engineering design innovation and construction process research and improvement.
Disclosure of Invention
The invention aims to overcome the defects of the technology and provide a novel reverse construction method assembly type non-pressure culvert and a construction method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a novel reverse construction method assembled non-pressure culvert which characterized in that: the prestressed precast pile side wall structure comprises a prestressed precast pile side wall, an upper top plate and a lower bottom plate; the prestressed precast pile side wall is formed by precast piles arranged side by side, a pile head steel plate is pre-embedded in a pile head of the precast pile, and the pile head steel plate is welded with a stressed steel bar in the upper top plate; the lower part of precast pile is provided with the keyway, set up pre-buried steel sheet in the keyway, pre-buried steel sheet and the inside atress reinforcing bar of precast pile are connected, and the reservation has mechanical connector on the pre-buried steel sheet, mechanical connector is connected with the atress reinforcing bar of bottom plate.
Preferably, the precast pile is hollow inside, a steel bottom supporting plate is fixed to the inner portion of the precast pile close to the upper position, a hole is formed in the middle of the steel bottom supporting plate, and a four-corner steel bar support and stirrups are arranged on the upper portion of the steel bottom supporting plate and filled with fine aggregate concrete.
Preferably, the gaps between the precast piles are filled with flexible water stopping materials.
Preferably, the upper top plate and the lower bottom plate are cast-in-place or prefabricated structures.
A construction method of a novel reverse construction method assembly type non-pressure culvert comprises the following steps: (1) under the premise of construction conditions, firstly, excavating earthwork on a ground layer to a pile top foundation surface according to a determined design elevation;
(2) the prefabricated piles are driven into the foundation surface to be built in a densely-arranged mode, water-stopping materials among the piles are poured according to engineering requirements, pile heads are processed at the top according to the method of a pile cap, and post-cast layers, anchoring steel bars and steel plates are buried;
(3) combining the pile top position and the top plate elevation to carry out top plate construction operation, wherein the top plate is rigidly connected with the precast pile, and the method is to weld the top plate stressed steel bar with the precast pile head steel plate or weld the top plate stressed steel bar with the pile head steel bar and anchor the pile head steel bar in the top plate;
(4) after the precast pile and the top plate form an integral structure and have soil retaining conditions, performing hole digging construction on the earthwork below the top plate by adopting a reverse construction method until the base elevation of the bottom plate is designed, and simultaneously matching construction precipitation;
(5) carrying out site construction operation on the bottom plate, wherein the bottom plate is also in rigid connection with the precast pile;
(6) after the construction of the bottom plate is completed, decorating the interior by combining the using function of the culvert;
(7) the whole construction process is finished.
In the step (6), the interior of the culvert is subjected to waterproof treatment, and the waterproof treatment can adopt measures such as sticking a rigid or flexible waterproof layer inside the culvert and arranging a waterproof curtain outside the culvert, so that the structure and the surrounding matching conditions of the culvert are perfected, and the culvert has a use function.
The invention has the advantages that 1) the structure has definite stress, strong integral stability, no need of basic treatment and small sedimentation amount. 2) The prefabricated side wall is fabricated by adopting an assembly type prefabricated side wall and a reverse construction method, the construction period is short, the using amount of templates and supports is reduced, and the manufacturing cost is reduced by more than 30% compared with that of a conventional culvert. 3) The culvert structure type is combined, a reverse construction method construction process is innovatively adopted, the construction cost can be greatly saved, the construction period is obviously shortened, the influence of construction excavation and supporting operation on the environment and natural water bodies is effectively avoided, the migration and water and soil loss are reduced, and the generation of social instability factors is prevented. 4) The method responds to national policies, integrates the characteristics of culvert engineering in various industries following the situation, gives full play to the advantages of the assembly type building, accords with the future development direction of green building technology, and plays a role in sustainable development. 5) The application is flexible and changeable, can be changed and adjusted according to the characteristics of various culvert projects in different industries of various regions, has strong adaptability and has certain social popularization and economic value.
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FIG. 1 is a cross-sectional view of the present invention;
fig. 2 is a top view of a precast pile according to the present invention.
Detailed Description
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
According to the scheme, a great amount of technical attention is paid to the aspects of structural type innovation, construction method research and improvement and the like while the culvert action mechanism is deeply researched. The project scheme is developed based on the assembly type technology generally popularized in the state at present, the structural style of the existing culvert is effectively innovated and improved, and the comprehensive application is realized by referring to the principle of the underground engineering (foundation pit) inverse working method. Compared with the traditional culvert of the same standard, the culvert construction method has the advantages that the investment is more economic, the construction period is short, the structure is simple, the construction is convenient, the environment is protected, the popularization policy is met, and the culvert construction method is high in applicability, so that the requirements of various non-pressure culvert engineering constructions are met.
As shown in fig. 1, a novel fabricated non-pressure culvert of reverse construction method comprises a prestressed precast pile side wall 1, an upper top plate 2 and a lower bottom plate 3; the prestressed precast pile side wall is formed by precast piles arranged side by side, a pile head steel plate 4 is pre-embedded in a pile head of the precast pile, and the pile head steel plate is welded with a stress reinforcing steel bar 5 in the upper top plate; the below of precast pile is provided with keyway 6, set up pre-buried steel sheet 7 in the keyway, pre-buried steel sheet and the inside atress reinforcing bar of precast pile are connected, and it has mechanical connector 8 to reserve on the pre-buried steel sheet, mechanical connector is connected with the atress reinforcing bar 9 of bottom plate.
As shown in fig. 2, in the present scheme, the interior of the precast pile is hollow, a steel bottom support plate 10 is fixed to the interior of the precast pile at an upper position, a hole is formed in the middle of the steel bottom support plate, and a four-corner steel bar support 11 and a stirrup 12 are arranged on the upper portion of the steel bottom support plate and filled with fine aggregate concrete 13.
And flexible water stopping materials 14 are filled in gaps among the precast piles. The waterproof can adopt measures of internally sticking a rigid or flexible waterproof layer, externally arranging a waterproof curtain and the like. Perfects the matching conditions of the culvert structure and the periphery, and ensures that the culvert has the use function. At the moment, the precast pile is used as a building main body envelope structure for a long time.
The culvert structure side wall enclosure structure adopts the prestressed reinforced concrete precast pile, is a standard precast component of a manufacturer, and can adjust the shape, the length and the like according to engineering requirements. The culvert top plate is divided into a cast-in-place structure and a prefabricated structure according to the project span and the upper load distribution condition, and the bottom plate is generally of a cast-in-place reinforced concrete structure. The culvert bottom plate, the wall body and the top plate are all rigidly connected and are realized by the modes of pre-forming mechanical connecting joints, pre-forming key grooves, welding steel plates, anchoring and welding stressed steel bars, filling cores in the precast piles and the like.
The working process of the scheme is as follows: building site positions by combining culverts, exploring peripheral sites and geological conditions, and shooting by combining main body engineering precast piles, and determining supporting, construction and precipitation schemes.
(1) Under the premise of construction conditions, firstly, excavating earthwork to the pile top elevation (foundation surface) on a ground layer according to the determined design elevation.
(2) The prefabricated pile is driven into the foundation surface in a close-packed manner, water-stopping materials among the piles are poured according to engineering requirements, the pile head is processed at the top according to the method of a pile cap, and a post-cast layer, anchoring steel bars, steel plates and the like are buried (the pile top can be cut and reinforced according to the specific conditions of the engineering).
(3) And combining the pile top position and the roof elevation to carry out roof construction operation. Wherein, the roof adopts rigid connection with the precast pile, and the way is with roof atress reinforcing bar and precast pile head steel sheet welding, or with pile head reinforcing bar welding and anchor in the roof.
(4) And after the precast pile and the top plate form an integral structure and soil retaining conditions are met, carrying out hole digging construction on the earthwork below the top plate by adopting a reverse construction method until the base elevation of the bottom plate is designed, and simultaneously, matching construction precipitation. At the moment, the precast pile plays a role of supporting the pile.
(5) The method comprises the steps of setting a key groove on one side of the bottom plate and arranging a pre-buried steel plate (the steel plate is connected with pile body stress steel bars) in the groove in the machining process of a precast pile manufacturer, reserving a mechanical connecting joint at the position of the bottom plate stress steel bars, and connecting the bottom plate with the bottom plate part stress steel bars when the bottom plate is constructed and bound with the steel bars.
(6) After the construction of the bottom plate is completed, decoration or waterproof treatment (or no treatment) is carried out on the interior by combining the using function of the culvert, and the waterproof can adopt measures such as internally sticking a rigid or flexible waterproof layer and externally arranging a waterproof curtain. Perfects the matching conditions of the culvert structure and the periphery, and ensures that the culvert has the use function. At the moment, the precast pile is used as a building main body envelope structure for a long time.
(7) The whole construction process is finished.
The culvert side wall adopts the prestressed precast pile side wall in the scheme, the thickness of the side wall can be reduced, the precast pile side wall can bear the pressure of pile side soil during the construction of a reverse construction method, the side wall is partially buried in the soil to resist negative bending moment during operation, the structural stress is more reasonable, the thickness of the bottom plate and the side wall can be reduced, the culvert foundation can be seen as a deep foundation acted by the pile side wall and the soil between walls together, the bearing capacity and the stability of the culvert can be increased, the requirement on the foundation soil layer is lower, the foundation treatment is not needed, in addition, the construction is smaller to undisturbed soil, the upper load of the foundation is reduced after the construction of the culvert compared with the construction, and the settlement of the culvert is smaller.
Conventional traditional culvert is mostly integral, generally adopts reinforced concrete or masonry structure, and the construction needs carry out the excavation of relative scale to the construction within range, and construction cycle and process of construction are great to all ring edge borders influence simultaneously, and then increase whole cost. The scheme provides a unique assembled culvert structure based on the culvert action mechanism, and the prestressed reinforced concrete precast pile is innovatively adopted as a culvert side wall enclosure structure. The material has the characteristics of good durability, high strength, low manufacturing cost, short manufacturing and safety period and the like. Meanwhile, based on the unique mechanical properties of the material, the composite material can play the dual functions of supporting and enclosing when being applied to culvert engineering, and fully play the use value of the composite material. In addition, the use amount of the template and the support can be reduced, and the construction period is short. The scheme gives full play to the characteristics of a novel structure, combines permanent engineering and temporary engineering, has obvious advantages compared with the conventional culvert construction, and simultaneously saves a large amount of construction period and considerable engineering investment.
The novel culvert structural type and the construction method provided by the scheme have the advantages that the construction operation surface is small, the natural state of the surrounding environment can be maintained to the maximum degree, the novel culvert structural type and the construction method are used for municipal roads, railways and water conservancy industries, the width of the road surface and the water surface and the whole landscape effect can be effectively guaranteed, the influence of construction excavation operation on the environment and the water body is avoided, and the expropriation and the water and soil loss are reduced. Ensure the water environment, air quality, acoustic environment, regional crowd health and ecological environment of scenic spots along the line of construction areas. Effectively prevent the generation of social instability factors.
By combining with national industrial policies and in the concept of sustainable development, the novel culvert scheme provided by the scheme fully keeps various advantages of the fabricated building, such as replacing original cast-in-place operation by fabricated components and improving production efficiency. The construction period is short, the field wet operation amount is reduced, manpower and material resources are saved, the building cost is reduced, and the working efficiency is improved. The large-scale production of factories reduces the generation of site garbage and the influence on the surrounding environment, and the like. The corresponding technical scheme provided by the scheme accords with the future development directions of green construction technology and assembly type buildings, and has a good application prospect.
According to the novel culvert structure type and the construction method, the side wall enclosure structure adopts the driven precast pile, so that the section and the length can be designed and produced according to foundation conditions. Meanwhile, the prefabricated pile can be used as a supporting structure based on the mechanical characteristics of the prefabricated pile, so that the prefabricated pile is not limited by sites and environments and can be used for various landforms in mountainous areas, plains and the like. The arrangement can be mutually converted in different forms such as a straight section, a turning section, an arch shape, a box shape and the like according to different engineering requirements, and the functions can be switched under different running conditions such as open installation, hidden burying and the like. The method can be widely applied to various projects in municipal industry, highway, railway engineering and water conservancy industry, and has strong adaptability, certain social popularization and economic value.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides a novel reverse construction method assembled non-pressure culvert which characterized in that: the prestressed precast pile side wall structure comprises a prestressed precast pile side wall, an upper top plate and a lower bottom plate; the prestressed precast pile side wall is formed by precast piles arranged side by side, a pile head steel plate is pre-embedded in a pile head of the precast pile, and the pile head steel plate is welded with a stressed steel bar in the upper top plate; the lower part of precast pile is provided with the keyway, set up pre-buried steel sheet in the keyway, pre-buried steel sheet and the inside atress reinforcing bar of precast pile are connected, and the reservation has mechanical connector on the pre-buried steel sheet, mechanical connector is connected with the atress reinforcing bar of bottom plate.
2. The novel reverse-construction assembled pressureless culvert according to claim 1, characterized in that: the precast pile is inside to be hollow, and the precast pile is inside to lean on the upper position to be fixed with the steel bottom plate, trompil in the middle of the steel bottom plate, and the upper portion of steel bottom plate is equipped with four corners steel bar support and stirrup and fills with the pea gravel concrete.
3. The novel reverse-construction assembled pressureless culvert according to claim 1, characterized in that: and flexible water stopping materials are filled in gaps among the precast piles.
4. The novel reverse-construction assembled pressureless culvert according to claim 1, characterized in that: the upper top plate and the lower bottom plate adopt cast-in-place or prefabricated structures.
5. A novel construction method of a reverse construction method assembly type non-pressure culvert is characterized in that: the method comprises the following steps: (1) under the premise of construction conditions, firstly, excavating earthwork on a ground layer to a pile top foundation surface according to a determined design elevation;
(2) the prefabricated piles are driven into the foundation surface to be built in a densely-arranged mode, water-stopping materials among the piles are poured according to engineering requirements, pile heads are processed at the top according to the method of a pile cap, and post-cast layers, anchoring steel bars and steel plates are buried;
(3) combining the pile top position and the top plate elevation to carry out top plate construction operation, wherein the top plate is rigidly connected with the precast pile, and the method is to weld the top plate stressed steel bar with the precast pile head steel plate or weld the top plate stressed steel bar with the pile head steel bar and anchor the pile head steel bar in the top plate;
(4) after the precast pile and the top plate form an integral structure and have soil retaining conditions, performing hole digging construction on the earthwork below the top plate by adopting a reverse construction method until the base elevation of the bottom plate is designed, and simultaneously matching construction precipitation;
(5) carrying out site construction operation on the bottom plate, wherein the bottom plate is also in rigid connection with the precast pile;
(6) after the construction of the bottom plate is completed, decorating the interior by combining the using function of the culvert;
(7) the whole construction process is finished.
6. The method of claim 5, wherein: in the step (6), the interior of the culvert is subjected to waterproof treatment, and the waterproof treatment can adopt measures such as sticking a rigid or flexible waterproof layer inside the culvert and arranging a waterproof curtain outside the culvert, so that the structure and the surrounding matching conditions of the culvert are perfected, and the culvert has a use function.
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| CN201911338410.6A CN110965488A (en) | 2019-12-23 | 2019-12-23 | Novel reverse construction method assembly type non-pressure culvert and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111877399A (en) * | 2020-07-28 | 2020-11-03 | 南通隆嘉机械科技有限公司 | Construction method for rapid channel sinking culvert construction by reverse operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111877399A (en) * | 2020-07-28 | 2020-11-03 | 南通隆嘉机械科技有限公司 | Construction method for rapid channel sinking culvert construction by reverse operation |
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