Underground side wall structure sliding rail suspension heat preservation maintenance device and construction method thereof

Abstract

The application discloses an underground side wall structure sliding rail suspension heat preservation and maintenance device and a construction method thereof, which comprises cast-in-place side walls, side wall steel bars, mounting pieces, sliding rails, sliding pieces and heat preservation and maintenance units. Suitable heat preservation and moisture suspension materials are selected according to the size and material heat conductivity coefficient of the underground side wall structure. Load-bearing sliding rails and hook devices are designed according to the size and weight of the suspension materials. One end of the suspension material is punched. After the cast-in-place side wall mass concrete is poured and the formwork is removed, the load-bearing sliding rails are installed on the top end of the side wall. The suspension material is installed on the sliding rails by using the hooks and closely adheres to the surface of the side wall, so that the heat preservation and moisture maintenance effect is achieved, and the maintenance cost is greatly reduced. In addition, the construction connection of two adjacent side wall structures is good. After the maintenance of the previous side wall is completed, the suspension material can be directly transported to the next side wall by using the sliding rails for maintenance, so that the effects of saving machines and labor are achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of side wall maintenance construction, and particularly relates to a sliding rail suspension heat preservation and maintenance device for underground side wall structure and a construction method thereof. BACKGROUND

[0002] The main structure of a city rail transit station is usually an underground structure, and in areas with poor geological conditions and high underground water level, the anti-leakage performance requirement is high, and the key lies in controlling crack generation in the construction process of the structure.

[0003] There are three kinds of concrete cracks, namely plastic shrinkage, drying shrinkage and temperature shrinkage, and in the early stage of hardening, the plastic shrinkage and temperature shrinkage are caused by the volume and temperature changes in the hydration and solidification and hardening process of cement stone, and in the later stage, the drying shrinkage deformation is caused by the evaporation of internal free water in the concrete.

[0004] The main structure of an underground station belongs to a mass concrete structure, and in the construction process, a large amount of heat is released in the hydration reaction of the cementitious materials of the concrete, and due to the difference in the speed of heat dissipation inside and outside the concrete, the temperature difference between the inside and the surface of the structure is too large, a temperature gradient is formed, compressive stress is generated inside the concrete, tensile stress is generated on the surface, and when the tensile stress exceeds the ultimate tensile strength of the concrete, cracks will be generated on the surface of the concrete. When the volume of the concrete decreases during the hardening in the air, and the spontaneous deformation under the condition of no external force is constrained (supporting condition, steel bar, etc.), tensile stress will be generated in the concrete, and the concrete will crack. In addition, the humidity outside has a great influence on the cracks of the concrete, and the decrease of the humidity outside will accelerate the drying shrinkage of the concrete and also lead to the generation of cracks in the concrete. The generation of cracks in the concrete greatly reduces the overall anti-leakage performance of the underground structure, and a huge cost will be invested in repair during the later decoration and operation, and the leakage of the side wall of the main structure of the station is the most troublesome.

[0005] At present, the heat preservation and maintenance of the side wall is to paste polymeric insulation boards, but the cost of pasting the polymeric insulation boards is high and the appearance will be polluted. SUMMARY

[0006] The present application provides a sliding rail suspension heat preservation and maintenance device for underground side wall structure and a construction method thereof, to solve the technical problem of high cost and appearance pollution in the current side wall heat preservation and maintenance.

[0007] In order to achieve the above object, the present application adopts the following technical scheme: a sliding rail suspension heat preservation and maintenance device for underground side wall structure, comprising cast-in-place side wall, side wall reinforcement, mounting piece, sliding rail, sliding piece and heat preservation and maintenance unit, the side wall reinforcement is beyond the top of the cast-in-place side wall and the exceeding part is connected with the mounting piece, the sliding rail is spliced at several positions in the length direction of the side wall and is arranged on both sides of the cast-in-place side wall, the sliding rail is fixed on the side wall reinforcement through the mounting piece and extends to the top of the cast-in-place side wall, the sliding piece is installed inside the sliding rail and extends from the bottom end of the sliding rail, the heat preservation and maintenance unit is respectively suspended and installed on the sliding piece, a lifting ring is fixedly installed on the heat preservation and maintenance unit, the bottom end of the sliding piece is provided with a key buckle, the top of the heat preservation and maintenance unit is higher than the top of the side wall, the sliding rail is installed on the side wall reinforcement of the next section, and the heat preservation and maintenance unit is moved to the cast-in-place side wall of the next section through the sliding piece.

[0008] By adopting the above technical scheme, appropriate heat preservation and suspension materials are selected according to the size and material thermal conductivity of the underground side wall structure, the bearing sliding rail and hook device are designed according to the size and weight of the suspension material, one end of the suspension material is punched, after the cast-in-place side wall is poured and the formwork is removed, the bearing sliding rail is installed on the top of the side wall, the suspension material is installed on the sliding rail by using the hook and is closely attached to the surface of the side wall, the heat preservation and moisture preservation effect is achieved, and the maintenance cost is greatly reduced; in addition, the construction connection of the adjacent two sections of side wall structure is good, after the maintenance of the previous section of side wall is completed, the suspension material can be directly transported to the next section of side wall for maintenance by using the sliding rail, and the effect of saving machinery and labor is achieved.

[0009] Preferably, the mounting piece comprises a screw rod and a limiting nut, the top of the sliding rail is fixedly provided with a mounting code to form a mounting hole, a mounting bolt passes through the mounting hole, the limiting nut is larger than the mounting hole in size, and the limiting nut is threadedly connected on the screw rod to fix the sliding rail on the screw rod.

[0010] By adopting the above technical scheme, the sliding rail can be conveniently installed on the side wall reinforcement.

[0011] Preferably, the two ends of the plurality of sliding rails on each side of the side wall are buckled with a sealing.

[0012] By adopting the above technical scheme, the sliding piece can be prevented from being separated, the use is convenient, and the construction safety is ensured.

[0013] Preferably, the two sides of the sliding rail are provided with clamping grooves, the sliding rail is provided with a clamping tenon, the clamping tenon is in a C type with two legs extending into the clamping grooves, and the two ends of the clamping tenon are arranged on the adjacent two sliding rails, respectively.

[0014] By adopting the above technical scheme, the sliding rail butt joint can be assisted, the butt joint time of the sliding rail is reduced, the construction is fast and convenient, and the time cost is saved.

[0015] Preferably, the cast-in-place side wall is 12m long, the slide rail is 3m long, six slide rails are arranged on the two sides of each section of the cast-in-place side wall, 8 slide members are arranged on each meter of the slide rail, 24 slide members are arranged on each slide rail, 3 mounting codes are arranged on each slide rail, and the size of the heat preservation and maintenance unit is 3000x6000x20mm.

[0016] By adopting the above technical scheme, the size is reasonable, and the comprehensive maintenance cost is low.

[0017] Preferably, the heat preservation and maintenance unit is a mineral wool quilt surface-bound plastic cloth.

[0018] By adopting the above technical scheme, according to the size and material thermal conductivity of the underground side wall structure, a suitable heat preservation and moisture retention suspension material is selected, and through actual use test, the maintenance effect of the mineral wool quilt surface-bound plastic cloth is good and the cost is low.

[0019] Preferably, an inclined support pressure rod is arranged on the outer surface of the heat preservation and maintenance unit.

[0020] By adopting the above technical scheme, the heat preservation and maintenance unit can be well attached to the cast-in-place side wall, and the maintenance effect is good.

[0021] A construction method of a slide rail suspension heat preservation and maintenance device for an underground side wall structure, comprising the following steps,

[0022] Step one, first section of cast-in-place side wall steel bar binding, side wall steel bar installation of stable monitoring element, support formwork, fill rock wool sheet on the back of the formwork, pouring the first section of cast-in-place side wall;

[0023] Step two, assemble the slide rail and the heat preservation and maintenance unit on the ground, demould the formwork, separate the formwork from the concrete structure surface and keep a distance of 1m, avoid the rapid drop of the structure surface temperature and humidity caused by the air flow after the concrete demoulding, and then cause cracks, spray the maintenance agent on the surface of the cast-in-place side wall, then hoist the assembled slide rail and the heat preservation and maintenance unit by the automobile crane, and the personnel on the top of the side wall fix the slide rail and the side wall steel bar by the mounting member and ensure that the position of the slide rail can make the heat preservation and maintenance unit attach to the side wall;

[0024] Step three, second section of side wall steel bar binding, side wall steel bar installation of stable monitoring element, support formwork, fill rock wool sheet on the back of the formwork, pouring the second section of cast-in-place side wall;

[0025] Step four, demould the formwork, spray the maintenance agent on the surface of the cast-in-place side wall, install the slide rail on the second section of side wall steel bar by the mounting member and splice the slide rail on the first section of cast-in-place side wall, move the heat preservation and maintenance unit to the position of the second section of cast-in-place side wall by the slide member for maintenance, and manually remove the slide rail on the first section of cast-in-place side wall;

[0026] Step five, repeat steps three-four cycles using the heat preservation and maintenance unit until the completion of the side wall construction.

[0027] The beneficial effects of the present application are embodied in: 1, according to the size of the underground side wall structure and the material thermal conductivity coefficient selects the appropriate heat preservation and suspension material, according to the size and weight of the suspension material design load bearing slide rail and hook device, suspension material one end of the hole, side wall mass concrete pouring and after the removal of the formwork, install the load bearing slide rail on the top of the side wall, using the hook to install the suspension material on the slide rail and make it close to the side wall surface, achieve the effect of heat preservation and curing, greatly reduce the curing cost;

[0028] 2, the construction of adjacent two section side wall structure good connection, the previous section side wall curing is completed, can be directly used in slide rail to transport the suspension material to the next section of the side wall for curing, to save the effect of machinery and labor.

[0029] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application; The main purpose and other advantages of the present application can be achieved and obtained by the scheme specially pointed out in the description. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the first section of the present application Embodiment of cast-in-place side wall curing structure diagram;

[0031] Figure 2 is Figure 1 the enlarged view of A in Fig. 1;

[0032] Figure 3 is Figure 1 the enlarged view of B in Fig. 1;

[0033] Figure 4 is the second section of the present application Embodiment of cast-in-place side wall on the installation of slide rail state diagram;

[0034] Figure 5 is the present application Embodiment of heat preservation and maintenance unit through the slide slide state diagram;

[0035] Figure 6 is the present application Embodiment of heat preservation and maintenance unit slide to the second state diagram;

[0036] Figure 7 is the first section of the present application Embodiment of cast-in-place side wall removal of slide rail state diagram.

[0037] Marked: 1, cast-in-place side wall; 2, side wall reinforcement; 3, mounting; 4, slide rail; 5, sliding piece; 6, heat preservation and maintenance unit; 7, lifting ring; 8, key ring; 9, screw rod; 10, limiting nut; 11, mounting code; 12, seal; 13, clamping groove; 14, clamping tenon; 15, inclined strut pressing rod. DETAILED DESCRIPTION

[0038] The technical solutions of the present application are described in detail below by examples. The following examples are only exemplary and can only be used to explain and illustrate the technical solutions of the present application, but cannot be interpreted as a limitation of the technical solutions of the present application.

[0039] Combination Figures 1-3 A kind of underground side wall structure slide rail suspension heat preservation and maintenance device, including cast-in-place side wall 1, side wall reinforcement 2, mounting 3, slide rail 4, sliding piece 5 and heat preservation and maintenance unit 6, side wall reinforcement 2 is beyond the top of cast-in-place side wall 1 and the position of exceeding connection mounting 3, slide rail 4 is spliced to be provided with several places in the length direction of side wall and the both sides of cast-in-place side wall 1 are provided with slide rail 4, slide rail 4 is fixed on side wall reinforcement 2 by mounting 3 and extends to the side top of cast-in-place side wall 1, sliding piece 5 is installed in slide rail 4 inside and extends the bottom end of slide rail 4, heat preservation and maintenance unit 6 is respectively corresponding suspendedly installed on sliding piece 5, lifting ring 7 is fixedly installed on heat preservation and maintenance unit 6, the bottom end of sliding piece 5 is provided with key ring 8, the top of heat preservation and maintenance unit 6 is higher than the top of side wall, the next section of side wall reinforcement 2 is installed slide rail 4, heat preservation and maintenance unit 6 is moved to the next section of cast-in-place side wall 1 by sliding piece 5.

[0040] According to the size and material thermal conductivity of underground side wall structure, select appropriate heat preservation and suspension material, according to the size and weight of suspension material, design load-bearing slide rail 4 and hook device, one end of the suspension material is punched, after the cast-in-place side wall 1 is poured and the formwork is removed, the load-bearing slide rail 4 is installed on the top of the side wall, the suspension material is installed on the slide rail 4 using the hook and closely attached to the surface of the side wall, achieving the effect of heat preservation and moisture conservation, greatly reducing the maintenance cost; in addition, the construction connection of adjacent two sections of side wall structure is good, the previous section of side wall is directly used for maintenance, the suspension material is transported to the next section of side wall for maintenance, achieving the effect of saving machinery and labor.

[0041] Mounting 3 includes screw rod 9 and limiting nut 10, the top of slide rail 4 is fixedly provided with mounting code 11 to form mounting hole, mounting bolt passes through mounting hole, the size of limiting nut 10 is larger than mounting hole, limiting nut 10 is threadedly connected on screw rod 9 to fix slide rail 4 on screw rod 9, slide rail (4) can be more conveniently installed on side wall reinforcement 2.

[0042] The both ends of several slide rails 4 on each side of the side wall are buckled with seals 12, which can prevent the sliding piece 5 from detaching, facilitate use and ensure construction safety.

[0043] The slide rail 4 is provided with a clamping groove 13 on both sides, and a clamping tongue 14 in the shape of C with two legs extending into the clamping groove 13 is arranged on the slide rail 4. The two ends of the clamping tongue 14 are arranged on the adjacent two slide rails 4 respectively, which can assist the butt joint of the slide rail 4, reduce the butt joint time of the slide rail 4, and save time cost.

[0044] The cast-in-place side wall 1 is 12 m long, the length of the slide rail 4 is 3 m, six slide rails 4 are arranged on both sides of each section of the cast-in-place side wall 1, 8 sliding members 5 are arranged on each meter of the slide rail 4, 24 sliding members 5 are arranged on each slide rail 4, 3 mounting codes 11 are arranged on each slide rail 4, and the size of the heat preservation and maintenance unit 6 is 3000x6000x20mm. The size is reasonable, and the maintenance cost is relatively low.

[0045] The heat preservation and maintenance unit 6 is a mineral wool covered with plastic cloth. According to the size and material thermal conductivity of the underground side wall structure, appropriate heat preservation and moisture retention hanging materials are selected. Through actual use test, the maintenance effect of the mineral wool covered with plastic cloth is good and the cost is low.

[0046] The outer surface of the heat preservation and maintenance unit 6 is provided with a diagonal bracing pressure bar 15, which can ensure that the heat preservation and maintenance unit 6 is well attached to the cast-in-place side wall 1, and the maintenance effect is good.

[0047] In combination Figures 4-7 A construction method of a sliding and hanging heat preservation and maintenance device for an underground side wall structure, comprising the following steps,

[0048] Step one, the first section of the cast-in-place side wall 1 is reinforced, the side wall reinforcement 2 is installed with a stable monitoring element, a formwork is erected, rock wool sheets are filled on the back of the formwork, and the first section of the cast-in-place side wall 1 is poured;

[0049] Step two, the slide rail 4 and the heat preservation and maintenance unit 6 are assembled on the ground, the formwork is demoulded, the formwork is separated from the concrete structure surface and kept 1 m away from it, to avoid the rapid drop of the structure surface temperature and humidity due to the air flow after the concrete is demoulded, and then cause cracks, a curing agent is sprayed on the surface of the cast-in-place side wall 1, and then the assembled slide rail 4 and the heat preservation and maintenance unit 6 are lifted by the automobile crane, and the personnel at the top of the side wall fix the slide rail 4 with the side wall reinforcement 2 through the mounting member 3 and ensure that the position of the slide rail 4 can make the heat preservation and maintenance unit 6 attached to the side wall;

[0050] Step three, the second section of the side wall reinforcement 2 is reinforced, the side wall reinforcement 2 is installed with a stable monitoring element, a formwork is erected, rock wool sheets are filled on the back of the formwork, and the second section of the cast-in-place side wall 1 is poured;

[0051] Step four, template demolding, spraying curing agent on the surface of the cast side wall 1, installing the slide rail 4 on the second section of the side wall steel bar 2 through the mounting piece 3 and splicing with the slide rail 4 on the first section of the cast side wall 1, moving the heat preservation and curing unit 6 to the position of the second section of the cast side wall 1 through the sliding piece 5 for curing, and manually removing the slide rail 4 on the first section of the cast side wall 1;

[0052] Step five, repeating steps three-four to circulate the use of the heat preservation and curing unit 6 until the construction of the side wall is completed.

[0053] The above only describes the preferred specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements thought by those skilled in the art within the technical range disclosed by the present application should be covered within the protection scope of the present application.

Claims

1. A construction method for a sliding rail suspension thermal insulation and curing device for underground sidewall structures, characterized in that: The utility model provides a cast-in-situ side wall (1), side wall reinforcing steel bars (2), mounting pieces (3), slide rails (4), sliding pieces (5) and heat preservation maintenance units (6), the side wall reinforcing steel bars (2) are beyond the top end of cast-in-situ side wall (1) and the position of exceeding is connected mounting piece (3), the slide rail (4) is spliced to be provided with a plurality of places in the length direction of side wall and is provided with slide rail (4) on both sides of cast-in-situ side wall (1), slide rail (4) is fixed on side wall reinforcing steel bars (2) through mounting piece (3) and extends to the side top end of cast-in-situ side wall (1), sliding piece (5) is installed inside slide rail (4) and extends the bottom end of slide rail (4), heat preservation maintenance unit (6) is hung respectively on sliding piece (5) correspondingly, heat preservation maintenance unit (6) is fixedly installed with lifting ring (7), the bottom end of sliding piece (5) is provided with key buckle (8), the top of heat preservation maintenance unit (6) is higher than the top of side wall, the side wall reinforcing steel bars (2) of next section are installed slide rail (4), heat preservation maintenance unit (6) is moved to the cast-in-situ side wall (1) of next section through sliding piece (5), and the construction steps are as follows, Step one, the first section cast-in-situ side wall (1) steel bar binding, the side wall reinforcing steel bars (2) are installed stable monitoring elements, and the formwork is supported, the rock wool sheet is filled on the back of the formwork, and the first section cast-in-situ side wall (1) is poured; Step two, the slide rail (4) and heat preservation maintenance unit (6) are assembled on the ground, the formwork is demoulded, the formwork is separated from the concrete structure surface and keeps 1m distance with it, avoids the concrete demoulding and causes the structure surface temperature and humidity to drop rapidly due to the environmental air flow, and then causes the crack, the curing agent is sprayed on the cast-in-situ side wall (1) surface, then the assembled slide rail (4) and heat preservation maintenance unit (6) are lifted up through the automobile crane, the personnel on the top of side wall fixes slide rail (4) with side wall reinforcing steel bars (2) through mounting piece (3) and ensures the position of slide rail (4) can make heat preservation maintenance unit (6) adhere to side wall; Step three, the second section side wall reinforcing steel bars (2) are bound, the side wall reinforcing steel bars (2) are installed stable monitoring elements, and the formwork is supported, the rock wool sheet is filled on the back of the formwork, and the second section cast-in-situ side wall (1) is poured; Step four, the formwork is demoulded, the curing agent is sprayed on the cast-in-situ side wall (1) surface, the slide rail (4) is installed on the second section side wall reinforcing steel bars (2) through mounting piece (3) and is spliced with the slide rail (4) on the first section cast-in-situ side wall (1), heat preservation maintenance unit (6) is moved to the position of the second section cast-in-situ side wall (1) through sliding piece (5) and is maintained, and the slide rail (4) on the first section cast-in-situ side wall (1) is manually removed; Step five, the heat preservation maintenance unit (6) is used circularly until the construction of side wall is completed.

2. The construction method of claim 1, wherein the method further comprises: The mounting piece (3) includes screw rod (9) and limiting nut (10), the top of slide rail (4) is fixedly provided with mounting code (11) and forms mounting hole, mounting bolt passes through mounting hole, the size of limiting nut (10) is greater than mounting hole, limiting nut (10) is threadedly connected on screw rod (9) and fixes slide rail (4) on screw rod (9).

3. The construction method of claim 2, wherein the method further comprises: The both ends of a plurality of slide rails (4) of each side of side wall are buckled with seal (12).

4. The construction method of claim 3, wherein the method further comprises: The slide rail (4) is provided with a clamping groove (13) on both sides, and the slide rail (4) is provided with a clamping tenon (14) in the shape of C with two legs extending into the clamping groove (13), and the two ends of the clamping tenon (14) are arranged on the adjacent two slide rails (4) respectively.

5. The construction method of claim 4, wherein the method further comprises: providing a plurality of sliding rails on the side wall structure; and providing a plurality of sliding rail suspending devices on the side wall structure, wherein each sliding rail suspending device is connected to a corresponding sliding rail. The cast-in-place side wall (1) is 12 m long, the slide rail (4) is 3 m long, six slide rails (4) are arranged on both sides of each cast-in-place side wall (1) respectively, 8 slide members (5) are arranged on each meter of the slide rail (4), 24 slide members (5) are arranged on each slide rail (4), and 3 mounting codes (11) are arranged on each slide rail (4), and the size of the heat preservation and maintenance unit (6) is 3000x6000x20 mm.

6. The construction method of claim 5, wherein the method further comprises: The heat preservation and maintenance unit (6) is a mineral wool quilt surface bound plastic cloth.

7. The construction method of claim 6, wherein the method further comprises: providing a plurality of sliding rails on the side wall structure; and providing a plurality of sliding rail suspending devices on the side wall structure, wherein each sliding rail suspending device is connected to a corresponding sliding rail. The outer surface of the heat preservation and maintenance unit (6) is provided with an inclined support pressing rod (15).

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