CN210066671U - Novel rectangular gallery structure - Google Patents
Novel rectangular gallery structure Download PDFInfo
- Publication number
- CN210066671U CN210066671U CN201920238271.9U CN201920238271U CN210066671U CN 210066671 U CN210066671 U CN 210066671U CN 201920238271 U CN201920238271 U CN 201920238271U CN 210066671 U CN210066671 U CN 210066671U
- Authority
- CN
- China
- Prior art keywords
- gallery
- prefabricated
- corridor
- cast
- concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The utility model provides a novel rectangle corridor structure, includes the corridor body, corridor body both sides set up cast-in-place side wall, and cast-in-place side wall top sets up first prefabricated apron. The first prefabricated apron is equipped with the prefabricated apron of second in the T type intersection position one end of corridor body, and the prefabricated apron of second adopts step-like structure, and the first prefabricated apron of one of them corridor body top at T type intersection position is lapped on the step of the prefabricated apron of second of the first prefabricated apron one end in another corridor body top. A gap is reserved between first prefabricated cover plates at the transverse seam parting position of the dam section of the gallery body, the transverse seam penetrates through the gap, rubber water stop is arranged on the transverse seam, the top plate of the gallery body at the transverse seam is cast-in-place reinforced concrete, and machine-made metamorphic concrete and upper layer roller compacted concrete are synchronously poured. By adopting the structure, the reinforcing bars of the non-upstream side wall of the gallery are cancelled, so that the internal appearance quality of the gallery is ensured, the construction time of a gallery layer is saved, and the characteristics of quick construction of roller compacted concrete are fully exerted.
Description
Technical Field
The utility model relates to a roller compacted concrete gravity dam corridor, especially a novel rectangle corridor structure.
Background
The gallery type in the roller compacted concrete dam is many, but the main types are three, namely a cast-in-place urban door opening type gallery (a cast-in-place U-shaped gallery), a Liuxi dam type gallery and a prefabricated urban door opening type gallery (a prefabricated U-shaped gallery), and the cross section of the gallery is generally of a city door opening type.
The periphery of the structural form of the cast-in-place U-shaped gallery is generally wrapped by abnormal concrete and rises together with the full-section roller compacted concrete, but the structural form is complex, the influence of binding of reinforcing steel bars is added, the storage period of the concrete is generally long, the roller compacted concrete is difficult to store and roll, and the influence on the straight construction period of the dam is large. Therefore, although the experience of the cast-in-place U-shaped gallery is mature, the cast-in-place U-shaped gallery is difficult to adopt in a full-section roller compacted concrete dam, particularly in dam engineering with a relatively tight construction period.
The Liuxi gallery form is explored and developed in the United states Liuxi roller compacted concrete dam, and is named as the Liuxi gallery form. The Liuxi dam gallery principle is that after the filler pouring layer is rolled, the rolled concrete in the gallery is excavated by excavating equipment, aggregates without cementing materials are backfilled, and after the project is paved to a certain height or is finished, the backfilled aggregates are excavated to form the gallery. The method does not affect the construction of the roller compacted concrete large warehouse surface, thereby being particularly suitable for the full-section roller compacted concrete dam. However, the aggregate of the gallery is dug out after the roller compacted concrete of the dam rises to a certain height, and the gallery is provided very late, so that the gallery is not suitable for the roller compacted concrete dam with heavy construction tasks in the gallery.
The prefabricated U-shaped gallery has mature construction experience, is simple to construct, is mainly prefabricated outside a field, and is hoisted in a bin. But the prefabricated corridor mainly has the problems that the installation and pouring process is easy to deform and dislocate, water seepage cracks are difficult to find and repair after water storage, and the like, and has the defects in appearance and later-period overhaul.
Disclosure of Invention
The utility model aims to solve the technical problem that a novel rectangle corridor structure is provided, cancelled the arrangement of reinforcement of the non-upstream side wall of corridor, not only guaranteed the inside appearance quality of corridor, saved corridor layer engineering time simultaneously, full play roller compacted concrete is under construction's characteristics fast.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a novel rectangle corridor structure, includes the corridor body, corridor body both sides set up cast-in-place side wall, cast-in-place side wall top sets up first prefabricated apron.
In a preferable scheme, the cast-in-place side wall is of a cast-in-place modified concrete structure with the thickness of 50cm, and the first prefabricated cover plate is a C25 cover plate with the thickness of 30 cm.
In the preferred scheme, a second prefabricated cover plate is arranged at one end of a T-shaped cross part of the gallery body of the first prefabricated cover plate, the second prefabricated cover plate is of a step-shaped structure, and a first prefabricated cover plate at the top of one gallery body at the T-shaped cross part is overlapped on a step of the second prefabricated cover plate at one end of the first prefabricated cover plate at the top of the other gallery body.
In a preferred scheme, the gradient of the climbing gallery section of the gallery body is not more than 1: 1.5, the top of the corridor at the stair platform is not provided with a first prefabricated cover plate, and cast-in-place reinforced concrete and upper roller compacted concrete are synchronously poured.
In the preferred scheme, the width L of the step horizontal section of the climbing gallery section of the gallery body is not less than 300mm, and L + 2. B is not less than 600mm and not more than 660 mm.
In the preferred scheme, a gap is reserved between first prefabricated cover plates at the transverse seam parting position of the dam section of the gallery body, the transverse seam penetrates through the gap, rubber water stop is arranged on the transverse seam, the top plate of the gallery body at the transverse seam is cast-in-place reinforced concrete, and machine-made metamorphosis concrete and upper layer roller compacted concrete are synchronously cast.
The utility model provides a novel rectangle corridor structure through adopting above-mentioned structure, has following beneficial effect:
(1) the method has the advantages that when the requirements of gallery crack checking calculation are met, the steel bars are properly configured, so that the construction of gallery layer roller compacted concrete is convenient, the storage period and the pouring period of the gallery layer are shortened, and the characteristic of large-volume roller compacted concrete rapid construction is reflected;
(2) the size of the inner space of the gallery is increased, the gradient and the step size of the gallery are optimized, and the gallery is convenient for people to walk and equipment to be arranged;
(3) the consumption of steel bars and concrete is reduced, and the cost is saved.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic view of the vertical structure of the gallery of the present invention.
Fig. 2 is a schematic view of the top view structure of the T-shaped cross position of the corridor of the present invention.
Fig. 3 is a schematic view of the vertical structure of the T-shaped cross position of the corridor of the present invention.
Fig. 4 is the sectional structure schematic diagram of the corridor ascending section of the utility model.
Fig. 5 is a schematic view of the structure of the gallery gap of the present invention.
In the figure: cast-in-place side wall 1, first prefabricated apron 2, corridor body 3, the prefabricated apron of second 4, rubber stagnant water 5, transverse joint 6, cast-in-place roof 7, landing 8.
Detailed Description
As shown in fig. 1-5, a novel rectangular gallery structure comprises a gallery body 3, wherein cast-in-place side walls 1 are arranged on two sides of the gallery body 3, and a first prefabricated cover plate 2 is arranged on the top of each cast-in-place side wall 1.
In a preferable scheme, the cast-in-place side wall 1 is of a 50cm thick cast-in-place modified concrete structure, and the first prefabricated cover plate 2 is a 30cm thick C25 cover plate.
In the preferred scheme, the first prefabricated cover plate 2 is provided with a second prefabricated cover plate 4 at one end of a T-shaped intersection part of the gallery bodies 3, the second prefabricated cover plate 4 is of a step-shaped structure, and the first prefabricated cover plate 2 at the top of one gallery body 3 at the T-shaped intersection part is lapped on a step of the second prefabricated cover plate 4 at one end of the first prefabricated cover plate 2 at the top of the other gallery body 3.
In a preferred scheme, the gradient of the climbing gallery section of the gallery body 3 is not more than 1: 1.5, the top of the corridor at the stair platform 8 is not provided with the first prefabricated cover plate 2, and cast-in-place reinforced concrete and upper roller compacted concrete are synchronously poured.
In the preferred scheme, the width L of the step horizontal section of the climbing gallery section of the gallery body 3 is not less than 300mm, and L + 2. B is not less than 600mm and not more than 660 mm. (L is the horizontal section width of the step, B is the height of the single step)
In the preferred scheme, a gap is reserved between the first prefabricated cover plates 2 at the parting position of the transverse seam 6 of the dam section of the gallery body 3, the transverse seam 6 penetrates through the gap, the rubber water stop 5 is arranged on the transverse seam 6, the top plate of the gallery body 3 at the transverse seam 6 is cast-in-place reinforced concrete, and machine-made metamorphosis concrete and upper layer roller compacted concrete are synchronously poured.
This novel rectangle corridor stress analysis that proposes:
the sizes of galleries and vertical shafts in the dam are relatively small, the influence on the overall stress distribution of the gravity dam is not large, but local stress and even cracks can be generated in concrete around the galleries under the action of the self weight of the dam body, the upstream water pressure and the temperature stress.
(1) Under the action of the self weight of the dam body and the pressure of upstream water, stress generated around the gallery is borne by a virtual arch in the concrete, local tensile stress exists on a top plate, a bottom plate and a side wall of the gallery, and when the tensile stress exceeds the allowable tensile stress of the concrete, cracks are generated.
(2) Temperature stress:
the reasons for the temperature stress around the gallery are mainly the following two:
① temperature stress during construction:
concrete at the bottom and two sides of the gallery is poured firstly, then concrete at the top of the gallery is poured, and because the temperature rise, the heat dissipation and the elastic mold growth of the two parts of concrete have time difference, the contraction of the concrete at the top is restrained by the concrete at the two side walls to generate temperature tensile stress;
② annual temperature changes in the gallery will result in internal and external temperature differences around the gallery, creating tensile stresses.
And (3) computing the peripheral stress of the gallery:
and (4) calculating and selecting a 36# dam section, establishing a dam three-dimensional finite element model including a gallery orifice by adopting a large universal finite element calculation program ANSYS, and analyzing the peripheral stress condition of the gallery of the dam body. The ground floor and the four sides adopt normal constraint. During calculation, three working conditions of flood checking, construction completion, vehicle load in the construction process and the like are considered, through calculation and analysis, the periphery of the gallery under each working condition is mainly compressive stress, the local part of the gallery has 0.1-0.5MPa of tensile stress, and the length of a tensile stress area is less than 20.5 m.
And (3) peripheral temperature stress of the gallery: by aligning C in the existing dam body90And (2) analyzing the temperature observation data, semi-adiabatic temperature rise and adiabatic temperature rise test data of the large-volume roller compacted concrete, wherein the maximum temperature of the roller compacted concrete is raised to about 45 ℃, and the long-term balance is about 35-40 ℃. The annual average temperature near the dam site is about 30 ℃, the seasonal difference of the average temperature is small, the annual and annual changes of the temperature are small, and the daily difference is small.
Through observation of the water temperatures of a plurality of hydropower station reservoirs near the dam site, the temperature of 50m underwater is about 23-24 ℃ all year round, and the water temperature is stable year after year.
The engineering and regional characteristics are integrated, namely the temperature difference between the inside and the outside of the concrete is not large and is very stable in the construction period and the operation period, a proper amount of reinforcing steel bars are configured at the upstream of the gallery, and the interval time for controlling the concrete pouring around the gallery is not too long so as to avoid the crack generation in the gallery area.
According to the distribution area of tensile stress at the periphery of the gallery and considering the influence of temperature stress, referring to international similar engineering experience, the Su-Doubidi dam body adopts a rectangular gallery with cast-in-place side walls and prefabricated cover plates, and secondary-composition metamorphosis concrete C is adopted within 1m of the periphery of the gallery9020F50W8 (II), an upstream area foundation grouting and drainage gallery (3 m multiplied by 3 m) stress rib phi 20@200, a distribution rib phi 18@300, and is arranged on the upstream surface of the gallery; and the side walls of other traffic and monitoring galleries are not reinforced.
When carrying out the construction of the rectangle corridor that this novel provided, should pay attention to following several:
(1) the side wall formwork of the gallery is fixed by adopting an internal bracing steel structure, so that the influence of inclined drawing die ribs on roller compacted concrete construction is avoided;
(2) the gallery bottom plate and the drainage ditch are finished before side wall concrete pouring, and a certain space for second-stage slope finding is reserved in the drainage ditch, so that the second-stage slope finding is convenient after the gallery is formed;
(3) except the bottom surface of the prefabricated cover plate, deep roughening is carried out on other 5 surfaces after the pouring and the form removal are finished, so that the prefabricated cover plate is favorably combined with cast-in-place concrete;
(4) after the side wall of the corridor is formed, before the prefabricated cover plate is installed, mortar is used for carrying out mortar leveling treatment on the cornice of the cover plate, and the flatness of the top plate in the corridor after the cover plate is installed is ensured;
(5) after the prefabricated cover plate is installed, before the upper layer of rolled concrete is poured, mortar pointing treatment is carried out on the joint seams between the prefabricated plates;
(6) the distorted concrete on the upper part of the prefabricated cover plate is distorted by a mechanism as much as possible, and the mortar paving and distorted concrete vibrating quality are ensured.
The corridor structure is suitable for similar projects with tight construction period and appropriate climatic conditions, and the technology is worth popularizing and applying and provides reference for similar projects.
Claims (5)
1. The utility model provides a novel rectangle corridor structure, includes corridor body (3), characterized by: two sides of the gallery body (3) are provided with cast-in-situ side walls (1), and the top of each cast-in-situ side wall (1) is provided with a first prefabricated cover plate (2);
first prefabricated apron (2) be equipped with prefabricated apron of second (4) in the T type cross section one end of corridor body (3), prefabricated apron of second (4) adopt step-like structure, first prefabricated apron (2) overlap joint on the second of the first prefabricated apron (2) one end of corridor body (3) top of another corridor body (3) top on the step of prefabricated apron of second (4) of one of them corridor body (3) top at T type cross section.
2. The novel rectangular gallery structure of claim 1, wherein: the cast-in-place side wall (1) is of a 50cm thick cast-in-place modified concrete structure, and the first prefabricated cover plate (2) is a 30cm thick C25 cover plate.
3. A novel rectangular gallery structure as claimed in claim 1 or claim 2, wherein: the gradient of the climbing gallery section of the gallery body (3) is not more than 1: 1.5, the top of the corridor at the stair platform (8) is not provided with a first prefabricated cover plate (2), and cast-in-place reinforced concrete and upper roller compacted concrete are adopted for synchronous pouring.
4. The novel rectangular gallery structure of claim 3, wherein: the width L of the horizontal section of the step of the climbing gallery section of the gallery body (3) is not less than 300mm, and L + 2. B is not less than 600mm and not more than 660 mm.
5. A novel rectangular gallery structure as claimed in claim 1 or claim 2, wherein: the gallery body (3) is reserved with a gap between the first prefabricated cover plates (2) at the parting of the transverse seams (6) of the dam section, the transverse seams (6) penetrate through the gap, rubber water stops (5) are arranged on the transverse seams (6), and the top plate of the gallery body (3) at the transverse seams (6) is cast-in-place reinforced concrete and adopts machine-made metamorphosis concrete and upper layer roller compacted concrete to pour synchronously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238271.9U CN210066671U (en) | 2019-02-26 | 2019-02-26 | Novel rectangular gallery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238271.9U CN210066671U (en) | 2019-02-26 | 2019-02-26 | Novel rectangular gallery structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210066671U true CN210066671U (en) | 2020-02-14 |
Family
ID=69432796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920238271.9U Active CN210066671U (en) | 2019-02-26 | 2019-02-26 | Novel rectangular gallery structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210066671U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364422A (en) * | 2020-04-24 | 2020-07-03 | 海南省水利水电勘测设计研究院 | Site construction method of prefabricated corridor |
| CN113684790A (en) * | 2021-09-30 | 2021-11-23 | 中国水利水电第三工程局有限公司 | Construction method for concrete at climbing gallery part of roller compacted concrete dam |
| CN114250746A (en) * | 2021-12-31 | 2022-03-29 | 中国水利水电建设工程咨询贵阳有限公司 | Quick construction method for roller compacted concrete dam cross hole |
| CN114411615A (en) * | 2022-02-28 | 2022-04-29 | 中国水利水电第九工程局有限公司 | Dam climbing corridor rapid construction structure and construction method |
-
2019
- 2019-02-26 CN CN201920238271.9U patent/CN210066671U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364422A (en) * | 2020-04-24 | 2020-07-03 | 海南省水利水电勘测设计研究院 | Site construction method of prefabricated corridor |
| CN113684790A (en) * | 2021-09-30 | 2021-11-23 | 中国水利水电第三工程局有限公司 | Construction method for concrete at climbing gallery part of roller compacted concrete dam |
| CN114250746A (en) * | 2021-12-31 | 2022-03-29 | 中国水利水电建设工程咨询贵阳有限公司 | Quick construction method for roller compacted concrete dam cross hole |
| CN114250746B (en) * | 2021-12-31 | 2023-09-22 | 中国水利水电建设工程咨询贵阳有限公司 | Quick construction method for cross-hole of roller compacted concrete dam |
| CN114411615A (en) * | 2022-02-28 | 2022-04-29 | 中国水利水电第九工程局有限公司 | Dam climbing corridor rapid construction structure and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210066671U (en) | Novel rectangular gallery structure | |
| US11384501B2 (en) | Method for sealing post-cast strip in foundation with no gap | |
| CN101761092B (en) | Construction method of movable side wall of large overall template of large-span deep foundation pit | |
| CN105926669A (en) | Construction method of subway station | |
| CN109778721A (en) | Synchronization of jacking up bridge top and the bottom structure carries out the method that bridge increases transformation | |
| CN107059667A (en) | Door shape assembled armored concrete box culvert and its construction method | |
| CN206376287U (en) | Subway station main body and the float Structure of accessory structure interface | |
| CN104631512A (en) | Post-cast strip beam and slab construction method adopting formwork hanging method | |
| CN209227580U (en) | The tower-crane foundation structure of raft foundation is placed under a kind of | |
| CN102619236B (en) | Compound type ice chest foundation construction method | |
| CN109914474A (en) | A kind of pipe gallery U-type groove, which is excavated, presses push construction method | |
| CN103352537B (en) | Overall load bearing heat preserving wallboard and production construction process thereof | |
| CN105240018A (en) | Vertical shaft construction device and method | |
| CN107090848A (en) | A kind of ripple steel arch retaining wall | |
| CN213174773U (en) | Support system is exempted from to tear open type post-cast strip structure | |
| CN207944339U (en) | A kind of prefabricated superposed type anti-collision wall for urban viaduct | |
| CN106368445B (en) | Existing building reinforces self-supporting heat-insulating integral system and construction method | |
| CN106088758B (en) | A kind of bilayer assembled underground granary | |
| CN111456085A (en) | Cast-in-place concrete construction method for pipe gallery segment | |
| CN204645093U (en) | Basement outer wall post-cast strip advanced treatment structure | |
| CN216787229U (en) | Basement outer wall post-cast strip assembled shutoff steel sheet structure | |
| CN206189891U (en) | Existing building reinforcement is from load -bearing and insulating integration system | |
| CN105484260A (en) | Design and construction method for resisting crack, preventing seepage and stopping floating for large-area basement structure bodies | |
| CN212223970U (en) | Prefabricated apron post-cast strip stagnant water temporary enclosed construction | |
| CN103898835B (en) | The anti-back of the body of bridge draws load-bearing construction bracket and construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |