Side wall bottom die device adopting cover-excavation top-down method

Abstract

The invention discloses a side wall bottom die device adopting a cover-excavation top-down method, and relates to the technical field of building construction. The cover-excavation top-down method side wall bottom die device comprises a cover plate, a sand box and a base. The sand box comprises a rectangular bottom plate, a first side plate and a second side plate which are oppositely arranged on two long side edges of the bottom plate, and a third side plate and a fourth side plate which are oppositely arranged on two short side edges of the bottom plate, a first side lug is arranged at the top of the first side plate, and a second side lug is arranged at the top of the second side plate; the second side plate can be separated from the bottom plate in the direction away from the first side plate. The cover plate is obliquely and downwards supported at the tops of the first side plate and the second side plate along the direction from the first side plate to the second side plate, and is limited between the first side lug and the second side lug; reinforcing steel bar holes are vertically formed in the cover plate, and the base is arranged at the bottom of the bottom plate. The side wall bottom die device provided by the embodiment of the invention is used for blocking and reinforcing the bottom die at the bottom of the structural side wall, the mounting difficulty can be reduced, and the cyclic utilization rate can be increased.

Description

Technical Field

[0001] The present application relates to the technical field of building construction, and in particular to a side wall bottom formwork device of a cover-and-excavation reverse construction method. Background Art

[0002] The cover-excavation reverse construction method is an advanced underground engineering construction technology. Its core concept is to first construct the columns, beams and roof of the underground project, and then use them as supporting components. After the upper part resumes ground traffic, the lower part continues to excavate the soil and construct the underground main project. This method is suitable for situations where the excavation surface is large, the cover soil is shallow, and the surrounding buildings are too close, especially in situations where road traffic needs to be restored as soon as possible but there is a lack of a fixed covering structure.

[0003] In the construction of the cover-excavation reverse construction method, the bottom of the structural side wall needs to reserve connecting steel bars and perform bottom formwork sealing and reinforcement. For specific structures, please refer to CN114645551A and CN216839568U. At present, the side wall bottom formwork is mainly sealed by manually installing wooden formwork, but due to the small construction operation space, the installation and reinforcement of wooden formwork is difficult and the recycling rate is low, the construction efficiency is low, and the quality of the reserved and embedded steel bars is difficult to guarantee, and it needs to be processed later, which increases the cost. Summary of the invention

[0004] The purpose of the present application is to provide a side wall bottom formwork device of the cover-excavation reverse construction method, so as to solve the problems of difficult installation and reinforcement of wooden formwork and low recycling rate.

[0005] The technical solution adopted by this application to solve its technical problem is:

[0006] A side wall bottom mold device of a cover-excavation reverse construction method comprises a cover plate, a sand box and a base; the sand box comprises a rectangular bottom plate, a first side plate and a second side plate relatively arranged on two long sides of the bottom plate, and a third side plate and a fourth side plate relatively arranged on two short sides of the bottom plate, a first side ear is provided on the top of the first side plate, and a second side ear is provided on the top of the second side plate; the second side plate can be separated from the bottom plate in a direction away from the first side plate; the cover plate is supported obliquely downward from the direction from the first side plate to the second side plate on the top of the first side plate and the second side plate, and is limited between the first side ear and the second side ear; steel bar holes are vertically arranged on the cover plate, and the base is arranged at the bottom of the bottom plate.

[0007] Furthermore, the sand box also includes a connecting plate arranged opposite to the first side plate, the first side plate and the connecting plate are respectively arranged on the long sides of the bottom plate, and there is a steel bar avoidance space between the top of the connecting plate and the cover plate, the side of the connecting plate away from the first side plate is connected to the second side plate, and the second side plate can be separated from the connecting plate in a direction away from the connecting plate.

[0008] Furthermore, the connecting plate is connected to the second side plate via a clamping structure.

[0009] Furthermore, the clamping structure includes a first clamping portion provided on the connecting plate and a second clamping portion provided on the second side plate, and the first clamping portion is clamped and matched with the second clamping portion.

[0010] Furthermore, the second side plate is provided with a plurality of groups of the second clamping parts from top to bottom.

[0011] Furthermore, the four corners of the bottom plate are fixed with reinforcement columns extending upward, and the first side plate, the third side plate and the fourth side plate are fixedly connected to the reinforcement columns respectively.

[0012] Furthermore, along the length direction of the bottom plate, both ends of the cover plate are respectively provided with cover plate limiting ears extending downwards.

[0013] Furthermore, a gusset plate is provided on the top of the outer surface of the third side plate or the fourth side plate, and a positioning groove extending along the width direction of the bottom plate is provided on the bottom of the gusset plate.

[0014] Furthermore, the base includes a plurality of casters.

[0015] Furthermore, the casters include universal wheels.

[0016] Beneficial effects of this application:

[0017] The side wall bottom mold device of the cover-and-dig reverse construction method provided in the embodiment of the present application is used to seal and reinforce the bottom of the structural side wall with the bottom mold; the cover plate, sand box and base can be assembled together outside the operating space and then moved into the operating space, thereby reducing the difficulty of installation; when the construction of the structural side wall is completed, the side wall bottom mold device can be quickly dismantled to improve its recycling rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a three-dimensional diagram of a side wall bottom mold device of a cover-and-dig reverse construction method provided in an embodiment of the present application;

[0020] Figure 2 2. It is a front view of a side wall bottom mold device of a cover-and-dig reverse construction method provided in an embodiment of the present application;

[0021] Figure 3 yes Figure 2 Enlarged view of part A in the middle;

[0022] Figure 4 is a side view of a side wall bottom mold device of a cover-and-dig reverse construction method provided in an embodiment of the present application;

[0023] Figure 5 : is an exploded view of a side wall bottom mold device of a cover-and-dig reverse construction method provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of a structure for sealing the bottom of a structural side wall by using a side wall bottom mold device of a cover-and-dig reverse construction method provided in an embodiment of the present application;

[0025] Figure 7 This is the state diagram when the sand box is removed;

[0026] Figure 8 This is a state diagram when the second side panel is removed;

[0027] Fig. 9 This is a diagram of the state when the cover is removed.

[0028] Reference numerals:

[0029] 10-cover plate;

[0030] 101-rebar hole;

[0031] 102-cover plate limiting ear;

[0032] 20-sand box;

[0033] 201- bottom plate;

[0034] 202- first side plate;

[0035] 203- second side plate;

[0036] 2031- second clamping portion;

[0037] 204- third side plate;

[0038] 205-fourth side panel;

[0039] 206-first pleurotus;

[0040] 207-second ear;

[0041] 208-connecting plate;

[0042] 2081-first clamping portion;

[0043] 209-Reinforcement column;

[0044] 210-Gusset plate;

[0045] 2101- positioning groove;

[0046] 30- base;

[0047] 301-castor;

[0048] 40-Rebar. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0050] In the description of this application, the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. Unless otherwise specified, the above-mentioned directional descriptions can be flexibly set in the process of actual application under the condition that the relative positional relationship shown in the accompanying drawings is satisfied.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] See also Figure 1 , Figure 2 , Figure 4 , Figure 5The embodiment of the present application provides a side wall bottom mold device of the cover-excavation reverse construction method, including a cover plate 10, a sand box 20 and a base 30; the sand box 20 includes a rectangular bottom plate 201, a first side plate 202 and a second side plate 203 relatively arranged on the two long sides of the bottom plate 201, and a third side plate 204 and a fourth side plate 205 relatively arranged on the two short sides of the bottom plate 201, a first side ear 206 is provided on the top of the first side plate 202, and a second side ear 207 is provided on the top of the second side plate 203; the second side plate 203 can be separated from the bottom plate 201 in a direction away from the first side plate 202; the cover plate 10 is obliquely supported downwardly on the top of the first side plate 202 and the second side plate 203 in the direction from the first side plate 202 to the second side plate 203, and is limited between the first side ear 206 and the second side ear 207; a steel bar hole 101 is vertically arranged on the cover plate 10, and the base 30 is arranged at the bottom of the bottom plate 201.

[0053] The sand box 20 includes a bottom plate 201, a first side plate 202, a second side plate 203, a third side plate 204 and a fourth side plate 205. The bottom plate 201 is a horizontally arranged rectangular structure. The first side plate 202 and the second side plate 203 are vertically arranged rectangular structures. The first side plate 202 and the second side plate 203 are arranged opposite to each other and are respectively connected to the two long sides of the bottom plate 201. The height of the top of the first side plate 202 is higher than the height of the top of the second side plate 203, and the second side plate 203 can be separated from the bottom plate 201 in a direction away from the first side plate 202. The third side plate 204 and the fourth side plate 205 are vertically arranged rectangular structures. The third side plate 204 and the fourth side plate 205 are arranged opposite to each other and are respectively connected to the two short sides of the bottom plate 201. Thus, a chamber with an open top can be formed between the bottom plate 201 , the first side plate 202 , the second side plate 203 , the third side plate 204 and the fourth side plate 205 , and the chamber is used to be filled with fine sand to pre-embed and fix the lower end of the steel bar 40 .

[0054] A first side ear 206 extending along the length direction is fixed to the top of the outer side surface of the first side plate 202, and a second side ear 207 extending along the length direction is fixed to the top of the outer side surface of the second side plate 203. The first side ear 206 and the second side ear 207 act as a limiter for limiting the cover plate 10 in the width direction of the base plate 201.

[0055] The cover plate 10 is an inclined rectangular structure, which is placed on the top of the sand box 20 and also serves as a bottom template. The cover plate 10 is supported obliquely downward on the first side plate 202 and the second side plate 203 along the direction from the first side plate 202 to the second side plate 203, and is limited between the first side ear 206 and the second side ear 207, so that the sand box 20 can be used to reliably support the cover plate 10.

[0056] Two groups of steel bar holes 101 are arranged at intervals along the width direction of the cover plate 10, and each group of steel bar holes 101 includes a plurality of steel bar holes arranged at intervals along the length direction of the cover plate 10. Each steel bar hole 101 is arranged vertically for the steel bar 40 in the structural side wall to pass through and for the lower end of the steel bar 40 to be embedded and fixed in the fine sand in the sand box 20. The base 30 is fixed to the bottom of the bottom plate 201, and is used to support the bottom plate 201 and provide a certain support height for the bottom plate 201.

[0057] The side wall bottom mold device of the cover-excavation reverse construction method provided in the embodiment of the present application is used to seal and reinforce the bottom of the structural side wall with the bottom mold. The specific construction process is as follows:

[0058] S1, assemble the side wall bottom mold device, fill the inner cavity of the sand box 20 with fine sand, and then move the side wall bottom mold device into the operating space; see Figure 6 , the second side plate 203 is close to the wall on its right side, the lower end of the steel bar 40 passes through the steel bar hole 101 of the cover plate 10 and is inserted into the fine sand in the sand box 20; in order to prevent the side wall bottom mold device from moving during the subsequent pouring of concrete, a limiting device abutting against the first side plate 202 can also be fixed on the foundation; to simplify the view, Figure 6 The structure of the limiting device is not shown.

[0059] S2, see Figure 7 , pour concrete on the top of the cover plate 10 to form a structural side wall. After the concrete solidifies, remove the limiting device on the left side of the first side plate 202, move the sand box 20 to the left, separate the top of the first side plate 202 from the cover plate 10, separate the second side plate 203 from the bottom plate 201, and there is a height difference between the lower end of the second side plate 203 and the foundation.

[0060] S3, see Figure 8 , move the second side plate 203 downward to separate the second side plate 203 from the cover plate 10, and then the second side plate 203 can be taken out of the operating space. Fig. 9 , move the cover plate 10 downward to separate the cover plate 10 from the steel bars 40, and then take the cover plate 10 out of the operating space.

[0061] Compared with the prior art, the cover-and-dig reverse construction method side wall bottom mold device provided in the embodiment of the present application, the cover plate 10, the sand box 20 and the base 30 can be assembled together outside the operating space and then moved into the operating space, thereby reducing the difficulty of installation; when the construction of the structural side wall is completed, the side wall bottom mold device can be quickly dismantled to improve its recycling rate.

[0062] In some embodiments, see Figure 5The sand box 20 also includes a connecting plate 208 arranged opposite to the first side plate 202. The first side plate 202 and the connecting plate 208 are respectively arranged on the long sides of the bottom plate 201, and there is a steel bar avoidance space between the top of the connecting plate 208 and the cover plate 10. The side of the connecting plate 208 away from the first side plate 202 is connected to the second side plate 203, and the second side plate 203 can be separated from the connecting plate 208 in a direction away from the connecting plate 208.

[0063] Specifically, the connecting plate 208 is a vertically arranged rectangular structure, the length direction of the connecting plate 208 is parallel to the length direction of the bottom plate 201, and the lower end of the connecting plate 208 is fixedly connected to the long side of the bottom plate 201. Accordingly, the second side plate 203 is installed and supported by the connecting plate 208, which can improve the convenience and firmness of the installation of the second side plate 203. By forming a steel bar avoidance space between the top of the connecting plate 208 and the cover plate 10, when the side wall construction is completed, when the side wall bottom formwork device is removed, the connecting plate 208 can be prevented from interfering with the steel bar 40, ensuring that the side wall bottom formwork device can be removed smoothly.

[0064] In some embodiments, see Figure 5 The connecting plate 208 is connected to the second side plate 203 through a clamping structure. Accordingly, the clamping structure can realize the rapid assembly and separation of the second side plate 203 and the connecting plate 208, and no other accessories are required during assembly, which saves costs.

[0065] For example, see Figure 5 The clamping structure includes a first clamping portion 2081 provided on the connecting plate 208 and a second clamping portion 2031 provided on the second side plate 203 , and the first clamping portion 2081 is clamped and matched with the second clamping portion 2031 .

[0066] For example, the first clamping portion 2081 may be a protrusion, and the second clamping portion 2031 may be a groove, and the protrusion is clamped and fitted in the groove. There may be multiple protrusions, and the multiple protrusions are arranged at intervals along the length direction of the connecting plate 208; there may also be multiple grooves, the number of which is consistent with the number of protrusions and corresponds one to one, and the protrusions are clamped and fitted in the corresponding grooves. In other embodiments, the first clamping portion 2081 may also be a groove, and the second clamping portion 2031 may be a protrusion.

[0067] In some embodiments, see Figure 5 , multiple groups of second clamping parts 2031 are arranged on the second side plate 203 from top to bottom. The multiple groups refer to at least two groups, and each group of second clamping parts 2031 may include at least two arranged at intervals along the length direction of the second side plate 203.

[0068] Correspondingly, by setting multiple groups of second clamping parts 2031, during assembly, the second clamping parts 2031 of different heights can be clamped and connected with the first clamping part 2081, thereby adjusting the installation height of the second side panel 203, realizing the installation requirements of cover plates 10 with different inclinations, and improving the flexibility and applicability of the entire side wall bottom mold device.

[0069] In some embodiments, see Figure 1 , Figure 5 The four corners of the bottom plate 201 are fixed with upwardly extending reinforcement columns 209 , and the first side plate 202 , the third side plate 204 and the fourth side plate 205 are fixedly connected to the reinforcement columns 209 respectively.

[0070] Accordingly, the use of the reinforcement column 209 can improve the firmness of the sand box 20, increase the bearing capacity of the sand box 20, enable it to withstand a larger load, help improve the stability of the sand box 20 during use, and reduce the risks during the construction process.

[0071] Specifically, the reinforcement column 209 can be made of angle steel, round steel or other shaped steel. The lower end of the reinforcement column 209 is welded to the bottom plate 201, and the first side plate 202, the third side plate 204, the fourth side plate 205 and the connecting plate 208 are respectively welded to the reinforcement column 209. The first side plate 202, the third side plate 204 and the fourth side plate 205 are respectively welded to the bottom plate 201.

[0072] In some embodiments, see Figure 1 , Figure 4 , Figure 5 , along the length direction of the bottom plate 201, the two ends of the cover plate 10 are respectively provided with cover plate limiting ears 102 extending downward. Accordingly, when the cover plate 10 is placed on the top of the sand box 20, the cover plate limiting ears 102 can be used to limit the cover plate 10 along the length direction of the bottom plate 201 by cooperating with the sand box 20.

[0073] In some embodiments, see Figure 1 , Figure 2 , Figure 3 , Figure 5 A buckle plate 210 is provided on the top of the outer surface of the third side plate 204 or the fourth side plate 205 , and a positioning groove 2101 extending along the width direction of the bottom plate 201 is provided on the bottom of the buckle plate 210 .

[0074] For example, see Figure 5 The buckle plate 210 is arranged on the top of the outer surface of the third side plate 204. When a plurality of side wall bottom formwork devices are installed in parallel in the operation space, the top of the fourth side plate 205 of one side wall bottom formwork device can be clamped in the positioning groove 2101 of the buckle plate 210 of another side wall bottom formwork device, so as to connect two adjacent side wall bottom formwork devices together and improve the reliability of construction.

[0075] In some embodiments, see Figure 2 , Figure 4 , Figure 5 The base 30 includes a plurality of casters 301 .

[0076] For example, three sets of casters 301 are installed below the base plate 201 along its length direction, and each set of casters 301 includes two casters spaced apart along the width direction of the base plate 201 .

[0077] Accordingly, the casters 301 can not only support the sand box 20, but also quickly move the sand box 20. When the sand box 20 is removed, the friction between it and the foundation can be reduced, thereby achieving the purpose of labor saving.

[0078] Among them, the caster 301 can include a universal wheel, which allows 360° rotation, so that the sand box can be easily moved in any direction, greatly improving maneuverability. Of course, the caster 301 can also include a fixed wheel, which is not specifically limited here.

[0079] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A side wall bottom formwork device of the cover-excavation reverse construction method, characterized in that: It comprises a cover plate (10), a sand box (20) and a base (30); The sand box (20) comprises a rectangular bottom plate (201), a first side plate (202) and a second side plate (203) arranged on two long sides of the bottom plate (201), and a third side plate (204) and a fourth side plate (205) arranged on two short sides of the bottom plate (201), wherein a first side ear (206) is arranged on the top of the first side plate (202), and a second side ear (207) is arranged on the top of the second side plate (203); the second side plate (203) can be separated from the bottom plate (201) in a direction away from the first side plate (202); The cover plate (10) is supported obliquely downward along the direction from the first side plate (202) to the second side plate (203) at the top of the first side plate (202) and the second side plate (203), and is limited between the first side ear (206) and the second side ear (207); a steel bar hole (101) is vertically arranged on the cover plate (10), and the base (30) is arranged at the bottom of the base plate (201).

2. The side wall bottom formwork device of the cover-excavation reverse construction method according to claim 1 is characterized in that: The sand box (20) further comprises a connecting plate (208) arranged opposite to the first side plate (202); the first side plate (202) and the connecting plate (208) are respectively arranged on the long sides of the bottom plate (201); and a steel bar avoidance space is provided between the top of the connecting plate (208) and the cover plate (10); the side of the connecting plate (208) facing away from the first side plate (202) is connected to the second side plate (203), and the second side plate (203) can be separated from the connecting plate (208) in a direction away from the connecting plate (208).

3. The side wall bottom formwork device of the cover-excavation reverse construction method according to claim 2 is characterized in that: The connecting plate (208) is connected to the second side plate (203) via a clamping structure.

4. The side wall bottom formwork device of the cover-excavation reverse construction method according to claim 3 is characterized in that: The clamping structure comprises a first clamping portion (2081) arranged on the connecting plate (208) and a second clamping portion (2031) arranged on the second side plate (203), and the first clamping portion (2081) is clamped and matched with the second clamping portion (2031).

5. The side wall bottom formwork device of the cover-excavation reverse construction method according to claim 4 is characterized in that: The second side plate (203) is provided with a plurality of groups of the second clamping parts (2031) from top to bottom.

6. The side wall bottom formwork device of the cover-excavation reverse construction method according to claim 1 is characterized in that: The four corners of the bottom plate (201) are fixed with upwardly extending reinforcement columns (209), and the first side plate (202), the third side plate (204) and the fourth side plate (205) are respectively fixedly connected to the reinforcement columns (209).

7. The side wall bottom formwork device of the cover-excavation reverse construction method according to claim 1 is characterized in that: Along the length direction of the bottom plate (201), two ends of the cover plate (10) are respectively provided with cover plate limiting ears (102) extending downwards.

8. The side wall bottom formwork device of the cover-excavation reverse construction method according to claim 1 is characterized in that: A buckle plate (210) is provided at the top of the outer surface of the third side plate (204) or the fourth side plate (205), and a positioning groove (2101) extending along the width direction of the bottom plate (201) is provided at the bottom of the buckle plate (210).

9. The side wall bottom formwork device of the cover-excavation reverse construction method according to claim 1, characterized in that: The base (30) includes a plurality of casters (301).

10. The side wall bottom formwork device of the cover-excavation reverse construction method according to claim 9, characterized in that: The casters (301) include universal wheels.

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