Prefabricated slab tire membrane structure of slope bearing platform under rock foundation condition and construction method of prefabricated slab tire membrane structure

Abstract

The invention discloses a precast slab tire membrane structure of a slope bearing platform under a rock foundation condition and a construction method of the precast slab tire membrane structure, and the precast slab tire membrane structure comprises a plurality of first anchor rods fixedly arranged on the side wall of a rock foundation pit; the side mold is a prefabricated plate, the side mold is arranged in a circle in the circumferential direction of the rock foundation pit, the side mold is provided with a through hole movably arranged on the first anchor rod in a sleeving mode, two locking pieces are installed on the first anchor rod in a position-adjustable mode, and the two locking pieces abut against the inner side and the outer side of the side mold respectively in a pressing mode. The bottom wall of the rock foundation pit is supported at the lower ends of the side molds; the bearing platform cushion layer is poured on the bottom wall and arranged in the lower end opening of the side mold, a second anchor rod is embedded in the bearing platform cushion layer and anchored in the bottom wall of the rock foundation pit, a containing groove is formed in the inner side of the lower end opening of the side mold, and concrete of the bearing platform cushion layer is poured into the containing groove. The problem that the side face is prone to floating and breaking when a traditional prefabricated plate tire film is adopted for constructing the slope bearing platform under the rock foundation condition is solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a prefabricated plate membrane structure of an inclined surface cap under rock foundation conditions and a construction method thereof. Background Art

[0002] When the foundation rock is broken to form a foundation pit for pouring the sloped cap (slope angle 30°~60°), the use of brick membrane to build the sloped cap is very labor intensive, so prefabricated slab membrane is used for construction. In the traditional prefabricated slab membrane construction process, the bottom cushion of the sloped cap is constructed first, and then the side formwork of the sloped cap is constructed. This method has the following problems when applied to the sloped cap:

[0003] During the construction of ordinary precast slab membrane, when the side is an inclined surface, the inclination angle of the side form cannot be accurately controlled during the construction process. At the same time, when the side of the precast slab is backfilled with concrete, the buoyancy during concrete pouring is large, which can easily cause the side form of the precast slab to float up. When the force on the entire slab surface is uneven, the slab membrane is prone to breakage, which in turn affects the subsequent waterproofing construction. Summary of the invention

[0004] In order to overcome the defects of the prior art, a prefabricated plate membrane structure for a sloped pedestal under rock foundation conditions and a construction method thereof are provided to solve the problem that the sides of the traditional prefabricated plate membrane are prone to floating and breaking when constructing a sloped pedestal under rock foundation conditions.

[0005] In order to achieve the above object, a prefabricated plate membrane structure of an inclined surface cap under rock foundation conditions is provided, comprising:

[0006] A plurality of first anchor rods, wherein the first anchor rods are fixed on the side wall of the rock foundation pit;

[0007] A side formwork tilted at a preset angle, the side formwork being a prefabricated plate, the side formwork being arranged in a circle along the circumferential direction of the rock foundation pit, the side formwork being provided with a through hole movably sleeved on the first anchor rod, two locking pieces being adjustably mounted on the first anchor rod, the two locking pieces being pressed against inner and outer sides of the side formwork respectively, the bottom wall of the rock foundation pit being supported on the lower end of the side formwork, and a backfill space being formed between the side formwork and the side wall of the rock foundation pit;

[0008] A cap cushion layer is cast on the bottom wall and arranged in the lower port of the side form, a second anchor rod is buried in the cap cushion layer, and the second anchor rod is anchored in the bottom wall of the rock foundation pit, and an accommodating groove is formed on the inner side of the lower port of the side form, and the accommodating groove is arranged in a circle along the circumferential direction of the rock foundation pit, and the concrete of the cap cushion layer is poured into the accommodating groove.

[0009] Furthermore, the side formwork includes a plurality of prefabricated panels spliced ​​together, and two adjacent prefabricated panels are connected by a tongue and groove.

[0010] Furthermore, a support portion is formed by extending downward from the bottom of a circle of prefabricated panels at the lower port of the side mold, and the accommodating groove is formed on a side of the support portion that is away from the side wall of the rock foundation pit.

[0011] Furthermore, an external thread is formed on one end of the first anchor rod away from the side wall of the rock foundation pit, and a threaded hole is formed on the locking piece, and the locking piece is screwed into one end of the first anchor rod.

[0012] Furthermore, the side mold is provided with a plurality of through holes, and the plurality of through holes are arranged in a matrix.

[0013] Furthermore, a steel mesh is embedded inside the cap cushion layer, one end of the second anchor rod is connected to the steel mesh, and the other end of the second anchor rod extends to the bottom of the cap cushion layer and is anchored in the bottom wall of the rock foundation pit.

[0014] The present invention provides a construction method of a prefabricated plate membrane structure of an inclined surface cap under rock foundation conditions, comprising the following steps:

[0015] A plurality of first anchor rods are fixedly installed on the side wall of the rock foundation pit;

[0016] The side form is tilted and arranged above the side wall of the rock foundation pit at a preset angle, so that the first anchor rod can be movably inserted into the through hole of the side form;

[0017] Adjusting the positions of the two locking pieces on the first anchor rod so that the two locking pieces are pressed against the inner and outer sides of the side mold respectively to fix the inclination angle of the side mold;

[0018] Anchoring a plurality of second anchor rods on the bottom wall of the rock foundation pit so that the plurality of second anchor rods are disposed in the lower port of the side form;

[0019] Concrete is poured on the bottom wall of the rock foundation pit to solidify and form a cap cushion layer, and the concrete of the cap cushion layer is poured into the receiving groove in the lower port of the side form.

[0020] The beneficial effect of the present invention is that the prefabricated plate membrane structure of the inclined pedestal under the rock foundation condition of the present invention reasonably optimizes the construction sequence of the basement pedestal, and adopts the method of first constructing the side panel membrane (i.e., the side mold) and then constructing the bottom plate cushion layer. The plate membrane is connected to the pedestal cushion layer through the accommodating groove, and the constraint of the pedestal cushion layer on the plate membrane is used to form the first anti-floating measure. In addition, in order to ensure accurate positioning and easy installation of the plate membrane during installation, the plate formwork is fixed by a first anchor rod and a locking piece. One end of the first anchor rod is immersed in the side wall of the rock foundation pit, and the other end is used to position the plate membrane, which works together with the first anti-floating measure to prevent the prefabricated plate from floating. At the same time, the angle of the prefabricated plate can be accurately positioned to improve the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0022] Figure 1 It is a structural schematic diagram of the prefabricated plate membrane structure of the inclined platform under the rock foundation conditions of an embodiment of the present invention.

[0023] Figure 2 It is a schematic structural diagram of the first anchor rod according to an embodiment of the present invention.

[0024] Figure 3 It is a schematic structural diagram of the side mold of an embodiment of the present invention.

[0025] Figure 4 It is a schematic structural diagram of the junction of the side form and the base cushion layer according to an embodiment of the present invention.

[0026] Figures 5 to 8 It is a schematic diagram of the steps of the construction method of the prefabricated plate membrane structure of the inclined platform under the rock foundation conditions of an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the inventions. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] Reference Figures 1 to 8 As shown, the present invention provides a prefabricated plate membrane structure of an inclined platform under rock foundation conditions, including: a first anchor rod 1, a side mold 2, and a platform cushion layer 3.

[0030] There are multiple first anchor rods 1. The first anchor rods 1 are fixed on the side walls of the rock foundation pit 4. In this embodiment, the rock foundation pit is in the shape of an inverted quadrangular pyramid. The rock foundation pit has four side walls and a bottom wall. Multiple first anchor rods are arranged on the four side walls respectively.

[0031] The side mold 2 is arranged opposite to the side wall of the rock foundation pit. Each side mold is inclined at a preset angle. The side mold 2 is a prefabricated plate. The side mold 2 is arranged in a circle along the circumferential direction of the rock foundation pit 4.

[0032] In this embodiment, see Figure 3 As shown, the side form 2 comprises a plurality of prefabricated panels spliced ​​together. Two adjacent prefabricated panels are connected by tongue and groove.

[0033] See also Figure 3 and Figure 4 As shown, the side form 2 is provided with a through hole movably mounted on the first anchor rod 1. Two locking members 11 are adjustably mounted on the first anchor rod 1. The two locking members 11 are respectively pressed against the inner and outer sides of the side form 2. The bottom wall of the rock foundation pit 4 is supported on the lower end of the side form 2. A backfill space is formed between the side form 2 and the side wall of the rock foundation pit 4.

[0034] Continue reading Figure 4 As shown, the bottom of a circle of prefabricated panels at the lower end of the side mold 2 extends downward to form a support portion 21. The accommodating groove 20 is formed on one side of the side wall of the support portion 21 facing away from the rock foundation pit 4.

[0035] The cap cushion layer 3 is cast on the bottom wall and arranged in the lower port of the side form 2. A second anchor rod 31 is embedded in the cap cushion layer 3. The second anchor rod 31 is anchored in the bottom wall of the rock foundation pit 4. An accommodating groove 20 is formed on the inner side of the lower port of the side form 2. The accommodating groove 20 is arranged in a circle along the circumferential direction of the rock foundation pit 4. The concrete of the cap cushion layer 3 is poured into the accommodating groove 20.

[0036] As a preferred embodiment, an end of the first anchor rod 1 away from the side wall of the rock foundation pit 4 is formed with an external thread. A threaded hole is formed in the locking member 11. The locking member 11 is screwed to one end of the first anchor rod 1.

[0037] In this embodiment, the side mold 2 is provided with a plurality of through holes arranged in a matrix.

[0038] Continue reading Figure 4 As shown, the cap cushion is a reinforced concrete cap. Specifically, the cap cushion includes cast-in-place concrete and a steel mesh. Among them, a steel mesh 32 is embedded in the concrete of the cap cushion 3. One end of the second anchor rod 31 is connected to the steel mesh 32. The other end of the second anchor rod 31 extends to the bottom of the cap cushion 3 and is anchored in the bottom wall of the rock foundation pit 4.

[0039] See also Figures 5 to 8 As shown, the present invention provides a construction method of a prefabricated plate membrane structure of an inclined surface cap under rock foundation conditions, comprising the following steps:

[0040] S1. A plurality of first anchor rods 1 are fixedly installed on the side wall of the rock foundation pit 4.

[0041] S2. The side form 2 is tilted at a preset angle above the side wall of the rock foundation pit 4 so that the first anchor rod 1 can be movably inserted into the through hole of the side form 2.

[0042] S3. Adjust the positions of the two locking pieces 11 on the first anchor rod 1 so that the two locking pieces 11 are respectively pressed against the inner and outer sides of the side mold 2 to fix the inclination angle of the side mold 2.

[0043] S4. Anchor a plurality of second anchor rods 31 on the bottom wall of the rock foundation pit 4 so that the plurality of second anchor rods 31 are disposed in the lower port of the side mold 2.

[0044] S5. Pour concrete on the bottom wall of the rock foundation pit 4 to solidify and form a cap cushion layer 3. The concrete of the cap cushion layer 3 is poured into the accommodating groove 20 in the lower port of the side form 2.

[0045] After the foundation cushion is solidified and formed, backfill the backfill space between the side form and the side wall of the rock foundation pit, and finally remove the locking parts, cut the exposed part of the first anchor rod, and repair the holes.

[0046] In this embodiment, the spacing of the perforations and the positions of the plate seams should be determined by calculation in combination with the side wall angle of the rock foundation pit.

[0047] When the first anchor is installed, it is anchored into the side wall of the rock foundation pit by no less than 10 centimeters to avoid instability due to insufficient strength. After the first anchor is installed, a locking piece of the first anchor away from the side wall of the rock foundation pit is removed first, and the other locking piece of the first anchor close to the side wall of the rock foundation pit is retained. The locking piece is disc-shaped.

[0048] After the side mold is installed, a locking member removed in advance is installed to fix the angle of inclination of the side mold. In the present embodiment, the angle of inclination of the side mold can be adjusted by adjusting the position of the locking member.

[0049] When constructing the foundation cushion, first tie the steel mesh, which should be inserted into the receiving groove of the side form.

[0050] After the backfilling of the backfill cavity is completed, the locking piece pressed against the inner side of the side wall of the side form away from the rock foundation pit is removed, the part of the first anchor rod exposed outside the side form is cut off, and the hole is sealed.

[0051] The prefabricated plate membrane structure of the inclined pedestal under the rock foundation condition of the present invention reasonably optimizes the construction sequence of the basement pedestal, and adopts the method of first constructing the side panel membrane (i.e., the side mold) and then constructing the bottom plate cushion layer. The plate membrane is connected to the pedestal cushion layer through the accommodating groove, and the constraint of the pedestal cushion layer on the plate membrane is used to form the first anti-floating measure. In addition, in order to ensure that the plate membrane is accurately positioned during installation and the installation is simple, the plate formwork is fixed by a first anchor rod and a locking piece. One end of the first anchor rod is immersed in the side wall of the rock foundation pit, and the other end is used to position the plate membrane, which works together with the first anti-floating measure to prevent the prefabricated plate from floating. At the same time, the angle of the prefabricated plate can be accurately positioned to improve the construction quality.

[0052] The prefabricated plate membrane structure of the sloped cap under rock foundation conditions of the present invention can effectively solve the problems of floating of the prefabricated plate and cracking caused by uneven force during the construction of the brick membrane of the sloped cap.

[0053] The prefabricated plate membrane structure of the sloped pedestal under rock foundation conditions of the present invention is simple to construct, can effectively ensure the slope angle of the pedestal, improve work efficiency, and enhance the construction quality of the sloped pedestal template.

[0054] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A prefabricated plate membrane structure for an inclined surface cap under rock foundation conditions, characterized in that: include: A plurality of first anchor rods, wherein the first anchor rods are fixed on the side wall of the rock foundation pit; A side formwork tilted at a preset angle, the side formwork being a prefabricated plate, the side formwork being arranged in a circle along the circumferential direction of the rock foundation pit, the side formwork being provided with a through hole movably sleeved on the first anchor rod, two locking pieces being adjustably mounted on the first anchor rod, the two locking pieces being pressed against inner and outer sides of the side formwork respectively, the bottom wall of the rock foundation pit being supported on the lower end of the side formwork, and a backfill space being formed between the side formwork and the side wall of the rock foundation pit; A cap cushion layer is cast on the bottom wall and arranged in the lower port of the side form, a second anchor rod is buried in the cap cushion layer, and the second anchor rod is anchored in the bottom wall of the rock foundation pit, and an accommodating groove is formed on the inner side of the lower port of the side form, and the accommodating groove is arranged in a circle along the circumferential direction of the rock foundation pit, and the concrete of the cap cushion layer is poured into the accommodating groove.

2. The prefabricated plate membrane structure of the inclined surface cap under rock foundation conditions according to claim 1 is characterized in that: The side formwork includes a plurality of prefabricated panels spliced ​​together, and two adjacent prefabricated panels are connected by tongue and groove.

3. The prefabricated plate membrane structure of the inclined surface cap under rock foundation conditions according to claim 2 is characterized in that: The bottom of a circle of prefabricated panels at the lower end of the side mold extends downward to form a supporting portion, and the accommodating groove is formed on a side of the supporting portion facing away from the side wall of the rock foundation pit.

4. The prefabricated plate membrane structure of the inclined surface cap under rock foundation conditions according to claim 1 is characterized in that: An end of the first anchor rod away from the side wall of the rock foundation pit is formed with an external thread, and the locking piece is provided with a threaded hole, and the locking piece is screwed into one end of the first anchor rod.

5. The prefabricated plate membrane structure of the sloped platform under rock foundation conditions according to claim 1 is characterized in that: The side mold is provided with a plurality of through holes, and the plurality of through holes are arranged in a matrix.

6. The prefabricated plate membrane structure of the sloped platform under rock foundation conditions according to claim 1 is characterized in that: A steel mesh is embedded in the interior of the cap cushion layer, one end of the second anchor rod is connected to the steel mesh, and the other end of the second anchor rod extends to the bottom of the cap cushion layer and is anchored in the bottom wall of the rock foundation pit.

7. A construction method for a prefabricated plate membrane structure of an inclined surface cap under rock foundation conditions as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: A plurality of first anchor rods are fixedly installed on the side wall of the rock foundation pit; The side form is tilted and arranged above the side wall of the rock foundation pit at a preset angle, so that the first anchor rod can be movably inserted into the through hole of the side form; Adjusting the positions of the two locking pieces on the first anchor rod so that the two locking pieces are pressed against the inner and outer sides of the side mold respectively to fix the inclination angle of the side mold; Anchoring a plurality of second anchor rods on the bottom wall of the rock foundation pit so that the plurality of second anchor rods are disposed in the lower port of the side form; Concrete is poured on the bottom wall of the rock foundation pit to solidify and form a cap cushion layer, and the concrete of the cap cushion layer is poured into the accommodating groove in the lower port of the side form.

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