Thermal insulation shed for arch support mass concrete winter construction

Abstract

The thermal insulation shed comprises a supporting framework, a shed body and a heating mechanism, the side direction of the supporting framework is covered with a thermal insulation layer, the top of the supporting framework is covered with a thermal insulation plate, one side of the supporting framework is fixedly supported at the corresponding position of the surface layer of a mountain downwards, and the other side of the supporting framework extends to the position above a foundation pit. The inner support of the foundation pit is used as a fulcrum, so that support structures such as stand columns are prevented from being reset, on one hand, the construction cost is reduced, on the other hand, part of the shed body is arranged in the arch support foundation pit, the windward area of the heat preservation shed is reduced, and the wind-resistant safety and the heat preservation capacity of the heat preservation shed are improved; the requirement for material hoisting hole sites in different positions of the top is met, meanwhile, the top opening area is reduced, heat loss is reduced, the heat preservation shed can serve as a steam curing shed of concrete, a proper humidity environment is provided for concrete curing, rebuilding is avoided, and the construction cost is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete construction technical field, more specifically, the utility model relates to a kind of heat preservation shed for arch seat mass concrete winter construction. BACKGROUND

[0002] As one of the main force components of arch bridge structure, arch seat mainly bears axial pressure, generally adopts reinforced concrete structure, and the arch seat is an inclined shaft embedded structure, including an inclined shaft foundation with an included angle with the horizontal plane, a pier seat is arranged on the upper part of the inclined shaft foundation, and the concrete pouring is divided into 13 times according to the concrete production capacity, and the single pouring volume is about 1500 cubic meters.The inner support of foundation pit is arranged to ensure the safety of foundation pit during excavation, and the mass reinforced concrete structure needs to be erected with a heat preservation shed during winter construction to avoid temperature cracks in concrete and reduce the bearing capacity, to ensure the pouring and curing environment temperature of concrete, and the arch seat heat preservation shed mainly ensures the temperature and humidity during the construction of 1-8 layers of concrete, and avoids winter construction of 9-13 layers.

[0003] At present, the concrete heat preservation shed is mainly a rectangular cuboid structure on the plain, and a drainage slope is arranged on the top surface, but the top surface of the structure is not provided with a material access hole, and materials, equipment and the like cannot be lifted into the shed by lifting equipment from the top surface.In addition, the top surface of some heat preservation sheds is provided with an integral drag type roof, which is opened integrally by a winch when lifting materials, but the roof is opened when lifting materials, which causes a large amount of heat loss and poor heat preservation effect during winter construction.Especially for the construction environment of mass concrete of arch seat in deep valley area, it is not convenient to set up support foundation, and higher requirements are put forward for wind resistance and heat preservation effect. SUMMARY

[0004] The utility model aims to provide a kind of heat preservation shed for arch seat mass concrete winter construction, to solve the technical problem of poor heat preservation capacity for arch seat mass concrete construction in the prior art.

[0005] In order to achieve these purposes and other advantages according to the utility model, a kind of heat preservation shed for arch seat mass concrete winter construction is provided, comprising:

[0006] The support framework is a portal structure and is arranged at the foundation pit of the arch seat along the longitudinal direction of the arch bridge, the top of the support framework is horizontally arranged, the bottom of one end of the support framework towards the inclined shaft is fixedly connected with the top of the inner support of the foundation pit, and the bottom of the other end of the support framework towards the outside of the inclined shaft is fixedly connected on the mountain body outside the foundation pit, and the inner side of the support framework forms a construction space communicating with the foundation pit.

[0007] The shed body comprises a heat preservation layer covering and connected to the side surface of the support framework located outside the foundation pit and a heat preservation plate covering and connected to the top of the support framework, the side of the heat preservation plate facing the foundation pit is arranged in shape matching with the corresponding position of the foundation pit wall, the top of the support framework is divided into a material hoisting area, and the heat preservation plate located in the material hoisting area is arranged in detachable connection with the support framework.

[0008] The temperature raising mechanism comprises a warm air gun device movably arranged in the construction space and used for raising the local temperature in the construction space.

[0009] Preferably, the support framework comprises a cross beam extending transversely along the arch seat and arranged longitudinally along the arch seat, the cross beam comprises a first cross beam located on the inner side of the foundation pit and a second cross beam located on the outer side of the foundation pit, the bottom of the two ends of the first cross beam is fixedly connected with the corresponding position of the top of the inner support of the foundation pit, the bottom of one end of all the second cross beams located on the same side is commonly connected with a longitudinal beam arranged horizontally along the longitudinal direction of the arch seat, the bottom of the longitudinal beam is connected with a stand column at intervals along the length direction, and the bottom of the stand column is fixedly connected with the surface layer of the mountain outside the foundation pit through an enlarged foundation.

[0010] Preferably, a flat link and a diagonal brace are further connected between the adjacent stand columns located on the same side.

[0011] Preferably, the bottom of the heat preservation plate is provided with a channel steel along the transverse direction and / or the longitudinal direction of the arch seat.

[0012] Preferably, the notch of the channel steel is upwardly arranged, the same positioning hole is formed in the web of the channel steel and corresponds to the top of the cross beam, a pin shaft is connected in the vertical direction on the positioning hole of the channel steel, and the lower end of the pin shaft is inserted downwardly and passes through the positioning hole on the cross beam.

[0013] Preferably, the length of the second cross beam is greater than the length of the first cross beam.

[0014] Preferably, the bottom of the cross beam is slidably connected with a sliding seat, a winch is mounted and connected on the sliding seat, the winch is downwardly connected with the warm air gun device, so as to realize the adjustment of the position of the warm air gun.

[0015] The utility model discloses at least following beneficial effect: the utility model discloses the heat preservation shed for arch seat mass concrete winter construction, including support framework, shed body, heating mechanism, the lateral direction of support framework is covered through the heat preservation layer, and the top is covered through the heat preservation board, and the lateral direction of support framework is fixedly supported in the corresponding position of mountain surface layer downwards at one side of pit exterior, and the other side of support framework extends to the above of pit, and with the support in pit as fulcrum, avoid resetting column and so on support structure, reduce construction cost on one hand, on the other hand, part shed body is in the arch seat pit, reduce the wind area of heat preservation shed, promote the wind safety and the heat preservation capacity of heat preservation shed, and the heat preservation board of setting up material hoisting area on the top of support framework can detachably set up, can satisfy the top material hoisting hole position demand while reducing the top trepanning area, reduce the heat loss, and material hoisting area can be flexibly set up, can satisfy the demand of different hoisting position, simultaneously, the heat preservation shed can be used as the steam maintenance shed of concrete, provides suitable humidity environment for concrete maintenance, avoids setting up again, further reduces construction cost.

[0016] Other advantages, objects, and features of the present utility model will become apparent from the following specification, and will be more fully understood in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the perspective view of the arch seat of an embodiment of the present utility model;

[0018] Figure 2 It is the main view structure diagram of the arch seat upward layering pouring of an embodiment of the present utility model;

[0019] Figure 3 It is the main view structure diagram of the heat preservation shed for arch seat mass concrete winter construction of the present utility model installation in the arch seat pit;

[0020] Figure 4 It is the side view structure diagram of the heat preservation shed for arch seat mass concrete winter construction of the present utility model installation in the arch seat pit;

[0021] Figure 5 It is the plan view structure diagram of the heat preservation shed for arch seat mass concrete winter construction of the present utility model installation in the arch seat pit;

[0022] Figure 6 It is the enlarged structure diagram of the channel steel and pin shaft setting of the present utility model.

[0023] The description of the drawings is as follows: 1, inclined shaft foundation, 2, pier seat, 3, tie beam, 4, cross beam, 5, inner support, 6, stand column, 7, enlarged foundation, 8, winch, 9, air heater device, 10, traction rope, 11, insulation board, 12, channel steel, 13, pin shaft, 14, first cross beam, 15, second cross beam, 16, insulation layer, 17, longitudinal beam, 18, flat link, 19, inclined strut, 20, construction space. DETAILED DESCRIPTION

[0024] The utility model makes further detailed description in combination with the drawings, so that the person skilled in the art can implement according to the description of the specification.

[0025] In the description of the utility model, the orientation or positional relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0026] As shown in Figures 1-5 The utility model discloses an arched seat mass concrete winter construction heat preservation shed, which comprises:

[0027] A support framework is arranged at the foundation pit of the arched seat in a door-shaped structure and extends longitudinally along the arched bridge, the top of the support framework is horizontally arranged, the bottom of one end of the support framework towards the inside of the inclined shaft is fixedly connected with the top of the inner support 5 of the foundation pit, and the bottom of the other end of the support framework towards the outside of the inclined shaft is fixedly connected on the mountain outside the foundation pit, and the inside of the support framework forms a construction space 20 communicated with the inside of the foundation pit;

[0028] A shed body comprises an insulation layer 16 covering and connected to the side of the support framework outside the foundation pit and an insulation board 11 covering and connected to the top of the support framework, the insulation board 11 is arranged in shape matching with the corresponding position of the wall of the foundation pit towards the foundation pit, the top of the support framework is divided into a material hoisting area, and the insulation board 11 located in the material hoisting area is arranged in detachable connection with the support framework;

[0029] A temperature raising mechanism comprises an air heater device 9 movably arranged in the construction space 20 and used for raising the local temperature in the construction space 20.

[0030] The embodiment provides a specific structure of an arch seat, the arch seat is a structure of embedded inclined shaft, and specifically comprises two inclined shaft foundations 1, the angle between the inclined shaft foundations 1 and the horizontal plane is about 45 degrees, a pier 2 is arranged on the upper portion of the inclined shaft foundation, and the two inclined shaft foundations 1 are connected through a tie beam 3. The massive concrete is generally constructed in layers, when the arch seat foundation pit is excavated, in order to ensure the safety of the foundation pit, an inner support 5 of the foundation pit is arranged, the concrete pouring is performed according to the concrete production capacity, the arch seat is poured in 13 times in total, and the single pouring amount is about 1500 cubic meters. The top of the top plate of the heat preservation shed for the massive concrete of the arch seat in the embodiment is used for pouring the eighth time, and the top of the position of the eighth time pouring concrete is used for heat preservation and moisture preservation of the concrete structure poured in the first to eighth times. When the support framework of the heat preservation shed is constructed, one side of the support framework located in the inside of the foundation pit is supported on the inner support 5 of the foundation pit as a fulcrum, and the other side of the support framework located outside the foundation pit is supported on the surface layer of the mountain. The side of the support framework facing the foundation pit is arranged in the form of basically adhering to the inner wall of the foundation pit, the support framework is covered through the heat preservation layer 16 in the lateral direction and covered through the heat preservation plate 11 at the top, so that a relatively independent construction space 20 is formed on the inner side of the support framework, the upper portion of the support framework is provided with some detachable heat preservation plates 11, when it is necessary to hoist materials, the heat preservation plates 11 in the material hoisting area are hoisted away, a material hoisting channel is left, the heating mechanism on the inner side of the support framework can be adjusted in position in the construction space 20, when it is snowing, the warm air gun is lifted to the vicinity of the detachable heat preservation plate 11, the local temperature is raised, the snow on the heat preservation plate 11 is avoided, and the safety of the heat preservation shed is further improved.

[0031] The heat preservation shed for the massive concrete of the arch seat in the embodiment uses the inner support 5 of the arch seat foundation pit as the fulcrum of the side of the heat preservation shed facing the foundation pit, avoids re-setting the support structure such as the stand 6, reduces the construction cost on the one hand, and on the other hand, part of the shed body is located in the arch seat foundation pit, the wind area of the heat preservation shed is reduced, the wind safety and the heat preservation capacity of the heat preservation shed are improved, a plurality of detachable heat preservation plates 11 are arranged at the top of the support framework, the requirement of the material hoisting hole position at the top can be met, the top opening area is reduced, the heat loss is reduced, the material hoisting area can be flexibly arranged, the requirement of different hoisting positions can be met, meanwhile, the heat preservation shed can be used as a steam curing shed for concrete, an appropriate humidity environment is provided for concrete curing, re-setting is avoided, and the construction cost is reduced.

[0032] In another technical solution, as shown in Figures 3-6 The support framework comprises a cross beam 4 extending in the transverse direction of the arch seat and arranged at intervals in the longitudinal direction of the arch seat, the cross beam 4 comprises a first cross beam 14 located on the inner side of the foundation pit and a second cross beam 15 located on the outer side of the foundation pit, the bottom of the two ends of the first cross beam 14 is fixedly connected with the top of the inner support 5 of the foundation pit, the bottom of one end of all the second cross beams 15 on the same side is commonly connected with a longitudinal beam 17 arranged horizontally in the longitudinal direction of the arch seat, the bottom of the longitudinal beam 17 is connected with a stand 6 at intervals in the length direction, and the bottom of the stand 6 is fixedly connected with the surface layer of the mountain outside the foundation pit through an enlarged foundation 7.

[0033] For the support framework located at the inner side of the foundation pit, the first cross beam 14 is arranged to lap on the top of the inner support 5 of the foundation pit in the transverse direction of the arch seat, and for the support framework located at the mountain body at the outer side of the foundation pit, a steel column 6 is arranged to be fixed as a fulcrum, the steel columns 6 at different positions are arranged to have lengths adapted to the terrain, the heights of the top of the steel columns 6 are ensured to be the same, and the steel columns 6 are jointly connected with the longitudinal beams 17, the enlarged foundations 7 at the bottom of the steel columns 6 are arranged according to the terrain lines of the mountain body, the longitudinal arrangement spacing is not greater than 6m, and the transverse arrangement spacing is about 13m.

[0034] In another technical scheme, as shown in Figure 3 , the flat link 18 and the inclined strut 19 are further connected between the adjacent columns 6 at the same side, so as to improve the connection rigidity and stability of the overall structure.

[0035] In another technical scheme, as shown in Figures 3-4 , 6, the bottom of the heat preservation plate 11 is provided with the channel steel 12 in the transverse and / or longitudinal direction of the arch seat, so as to increase the rigidity of the heat preservation plate 11.

[0036] In another technical scheme, as shown in Figure 6 , the notch of the channel steel 12 is upwardly arranged, the same positioning hole is formed in the web of the channel steel 12 and corresponds to the top of the cross beam 4, the positioning hole of the channel steel 12 is connected with the pin shaft 13 in the vertical direction, and the lower end of the pin shaft 13 is downwardly inserted into and passes through the positioning hole on the cross beam 4.

[0037] The heat preservation plate 11 can be divided into various specifications according to the site terrain, the positioning hole is generally a circular hole, the positioning hole is arranged on the cross beam 4, on the one hand, the position of the heat preservation plate 11 is aligned and installed, and on the other hand, after the pin shaft 13 is downwardly inserted into the positioning hole of the cross beam 4, the heat preservation plate 11 can be prevented from being lifted up due to strong wind.

[0038] In another technical scheme, as shown in Figure 5 , the length of the second cross beam 15 is greater than the length of the first cross beam 14. For the heat preservation shed, the part located at the outer side of the foundation pit can be appropriately expanded in the supporting and heat preservation range according to the construction needs, can abut against the outer wall at the upper end of the foundation pit in the lateral direction, and the transverse deformation resistance of the arch bridge is improved.

[0039] In another technical scheme, as shown in Figure 4 , the bottom of the cross beam 4 is slidingly connected with a sliding seat, the winch 8 is installed and connected on the sliding seat, the winch 8 is downwardly connected with the warm air gun device 9, so as to adjust the position of the warm air gun.

[0040] The cross beam 4 can be composed of two I-shaped steel welded in parallel, the web is vertically arranged, the bottom two flanges are provided with U-shaped sliding seats on the outer end, the upper end of the sliding seat is provided with a pulley on the upper side of the flange, a motor structure for driving the pulley to rotate can be additionally arranged on the sliding seat, or a sliding rail can be arranged at the bottom of the cross beam 4, there are many ways to slide along the setting direction of the cross beam 4, and those skilled in the art can adopt corresponding prior art or purchase existing products, as long as the cross beam 4 can be moved, the traction rope 10 of the winch 8 is connected with the air heater, which is used for vertically changing the height of the air heater, so that the position of the air heater in the vertical direction and the horizontal direction is adjusted.

[0041] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application. Those skilled in the art can easily realize other modifications, and therefore the present application is not limited to specific details and the drawings shown and described herein.

Claims

1. An insulation shed for winter construction of abutment mass concrete, characterized in that, The application relates to a support framework, a shed body and a heating mechanism. The support framework is in a door-shaped structure and is arranged at a foundation pit of an abutment along the longitudinal direction of an arch bridge; the top of the support framework is horizontally arranged; the bottom of one end of the support framework towards the inside of a slope is fixedly connected to the top of an inner support of the foundation pit; and the bottom of the other end of the support framework towards the outside of the slope is fixedly connected to a mountain outside the foundation pit; the inner side of the support framework forms a construction space which is communicated with the foundation pit. The shed body comprises a heat preservation layer which is connected to the side of the support framework outside the foundation pit and a heat preservation plate which is connected to the top of the support framework; the side of the heat preservation plate towards the foundation pit is arranged in a shape matched with the corresponding position of the wall of the foundation pit; the top of the support framework is divided into a material hoisting area; and the heat preservation plate in the material hoisting area is arranged in a detachable manner with the support framework. The heating mechanism comprises a warm air gun device which is movably arranged in the construction space and is used for improving the local temperature in the construction space.

2. The heat retaining shed for arch seat mass concrete winter construction according to claim 1, characterized in that, The support framework comprises cross beams which are arranged along the transverse direction of the abutment and are spaced apart along the longitudinal direction of the abutment; the cross beams comprise first cross beams which are arranged on the inner side of the foundation pit and second cross beams which are arranged on the outer side of the foundation pit; the bottoms of the two ends of the first cross beams are fixedly connected to the top of the inner support of the foundation pit at corresponding positions; the bottoms of one end of all the second cross beams on the same side are jointly connected to longitudinal beams which are arranged horizontally along the longitudinal direction of the abutment; the bottoms of the longitudinal beams are connected to vertical columns which are spaced apart along the length direction; and the bottoms of the vertical columns are fixedly connected to the surface layer of the mountain outside the foundation pit through enlarged foundations.

3. The heat retaining shed for arch seat mass concrete winter construction according to claim 2, characterized in that, A horizontal link and a diagonal brace are further connected between adjacent vertical columns on the same side.

4. The heat retaining shed for arch seat mass concrete winter construction according to claim 2, characterized in that, The bottom of the heat preservation plate is provided with a channel steel along the transverse direction and / or the longitudinal direction of the abutment.

5. The heat retaining shed for arch seat mass concrete winter construction according to claim 4, characterized in that, The groove of the channel steel is arranged upwards; positioning holes which are the same as the top of the cross beam are arranged on the web of the channel steel; a pin shaft is connected to the positioning hole of the channel steel along the vertical direction; and the lower end of the pin shaft is inserted downwards and penetrates through the positioning hole of the cross beam.

6. The heat retaining shed for arch seat mass concrete winter construction according to claim 2, characterized in that, The length of the second cross beam is greater than the length of the first cross beam.

7. The heat retaining shed for arch seat mass concrete winter construction according to claim 2, characterized in that, The bottom of the cross beam is slidably connected to a sliding seat; a winch is mounted on the sliding seat; the winch is connected to the warm air gun device downwards so as to adjust the position of the warm air gun.

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