Construction method of structural beams on both sides of temporary partition wall

Abstract

The application discloses a kind of construction methods of structure beam on both sides of temporary partition wall, and the reserved hole is formed when pouring temporary partition wall, and the rear opening of the penetration position of subsequent structure beam penetrating temporary partition wall is lofted out in advance, when the first structure beam of the first side of temporary partition wall is constructed, the end of the longitudinal reinforcement of the first structure beam is staggered according to Lae, so that the construction joint of structure beam is arranged at the position of Lae+100mm from temporary partition wall, when the second structure beam of the second side of temporary partition wall is constructed, the rear opening is formed by opening hole at the corresponding position of temporary partition wall, the second structure beam is connected with the first structure beam, and the range between the beam bottom of the second structure beam and temporary partition wall is supported by brick moulding membrane, to improve the construction efficiency of the second structure beam.The application solves the problem that the structure beam plate on both sides of temporary partition wall of foundation pit is constructed by using traditional construction method, which needs to be connected multiple times, and is not conducive to the safety of structure.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a method for constructing structural beams on both sides of a temporary partition wall. Background Technology

[0002] Currently, foundation pits located next to subway tunnels are mostly constructed in stages. This method requires the installation of temporary partition walls within the foundation pit, which disconnects the structures on both sides of the partition wall. The conventional construction method for the underground structures of the foundation pit (such as structural beams and slabs) involves constructing the structural beams and slabs on both sides of the temporary partition wall up to the partition wall, and then stitching them together after the partition wall is removed. This approach results in multiple connections of the structural beams, which is detrimental to structural safety and can easily lead to misalignment and inability to connect the beams on both sides. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, a construction method for structural beams on both sides of a temporary partition wall is provided to solve the problem that the traditional construction method for structural beams and slabs on both sides of the temporary partition wall in the foundation pit requires multiple connections, which is detrimental to structural safety.

[0004] To achieve the above objectives, a construction method for the structural beams on both sides of a temporary central partition wall is provided, comprising the following steps:

[0005] A temporary partition wall is constructed in the foundation pit. The temporary partition wall has a first side and a second side. Multiple reserved holes are formed on the outside of the corresponding structural beam of the temporary partition wall at the penetration position. The multiple reserved holes are arranged in a ring along the circumferential direction of the penetration position.

[0006] The first structural beam is constructed in the first-phase pit corresponding to the first side, so that a reserved gap is formed between the end of the first structural beam and the first side. Some of the longitudinal main bars have long anchorage sections, which extend into the reserved gap and fit against the first side. The remaining longitudinal main bars have short anchorage sections, which extend into the reserved gap on the side away from the temporary partition wall.

[0007] The temporary partition wall is cut along the circumferential direction of the plurality of pre-reserved holes to form a rear opening;

[0008] A second structural beam is constructed in the second-phase sub-pit corresponding to the second side, such that the end of the second structural beam passes through the rear opening and is connected to the end of the first structural beam, a portion of the longitudinal main reinforcement of the second structural beam is connected to the long anchorage section, and the remaining longitudinal main reinforcement of the second structural beam is connected to the short anchorage section.

[0009] Furthermore, the difference in length between the long anchorage section and the short anchorage section is adapted to the minimum anchorage length of the longitudinal main reinforcement of the first structural beam.

[0010] Furthermore, the length of the short anchoring section is greater than or equal to 100 mm.

[0011] Furthermore, the radius of the rear opening is 20 mm larger than the radius of the through-hole position.

[0012] Furthermore, the steps for constructing the second structural beam include:

[0013] A brick formwork is constructed on the bottom sidewall of the rear opening;

[0014] The first segmented bottom mold is erected below the reserved gap;

[0015] Therefore, a second segmented bottom formwork is erected on the second side, so that the brick formwork is spliced ​​with the first segmented beam bottom formwork and the second segmented beam bottom formwork to form a beam bottom formwork;

[0016] The second structural beam is formed by casting on the bottom formwork of the beam.

[0017] Furthermore, during the construction of the temporary partition wall, a reinforcing steel structure is embedded in the temporary partition wall, and the reinforcing steel structure is arranged in a circle along the circumferential direction of the rear opening to form a closed structure.

[0018] Furthermore, when cutting the temporary partition wall, a wire saw is used to cut the temporary partition wall along the circumferential direction of the plurality of reserved holes to form the rear opening.

[0019] The beneficial effects of this invention are as follows: the construction method of the structural beams on both sides of the temporary partition wall of this invention, by forming reserved holes during the pouring of the temporary partition wall, and laying out the subsequent opening at the penetration position of the structural beam through the temporary partition wall in advance, when constructing the first structural beam on the first side of the temporary partition wall, the ends of the longitudinal steel bars of the first structural beam are staggered according to Lae, so that the construction joint of the structural beam is set at a position of Lae+100mm away from the temporary partition wall, and there is only one construction joint. When constructing the second structural beam on the second side of the temporary partition wall, a hole is made at the corresponding position of the temporary partition wall to form a rear opening, and the second structural beam is connected to the first structural beam. The area between the bottom of the second structural beam and the temporary partition wall is supported by brick formwork, thereby improving the construction efficiency of the second structural beam. The construction method for the structural beams on both sides of the temporary partition wall of the present invention avoids setting construction joints on both sides of the temporary partition wall and then connecting the two structures after the temporary partition wall is demolished. Instead, it adopts a rear opening, and then the second structural beam passes through the rear opening, which reduces the construction error of the connection between the first and second structural beams, avoids the misalignment of the beams on both sides of the temporary partition wall, and the longitudinal reinforcement of the first and second structural beams can all be connected by sleeve mechanical connection, reducing safety hazards. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figures 1 to 4 This is a schematic diagram illustrating the construction steps of the temporary partition wall construction method on both sides of the structural beams according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram illustrating the steps of reinforcing steel reinforcement structure within a temporary partition wall according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram showing the location of the rear opening on the temporary partition wall in an embodiment of the present invention. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Reference Figures 1 to 6 As shown, the present invention provides a method for constructing structural beams on both sides of a temporary partition wall, including the following steps:

[0027] S1: A temporary partition wall 1 is constructed in the foundation pit. The temporary partition wall 1 has a first side and a second side. Multiple reserved holes a are formed on the outside of the corresponding structural beam penetration position d of the temporary partition wall 1. The multiple reserved holes a are arranged in a ring along the circumferential direction of the penetration position d.

[0028] Specifically, during the construction of the temporary partition wall 1, a reinforcing steel structure 11 is embedded in the temporary partition wall 1, and the reinforcing steel structure 11 is arranged in a circle along the circumferential direction of the rear opening b to form a closed structure.

[0029] See Figure 1 , Figure 5 and Figure 6 As shown, in this embodiment, the temporary partition wall is a non-permanent underground continuous wall.

[0030] When constructing the reinforcing cage for the temporary partition wall, the penetration positions (d) to be subsequently opened in the temporary partition wall are marked on the reinforcing cage based on the plan positions and elevations of the first and second structural beams on opposite sides of the temporary partition wall. The size of the opening is determined according to the dimensions of the structural beams, and each side is enlarged by 200mm to form the subsequent opening. After the layout, φ50 PVC sleeves are pre-embedded at the four corner points, and reinforcing steel structures are set around the penetration positions (d) to reinforce the structure.

[0031] The reinforced steel structure includes a grid-shaped steel reinforcement cage. The penetration points are located in the inner ring holes of the reinforced steel structure.

[0032] S2: Construct the first structural beam 2 in the first-phase sub-pit corresponding to the first side, so that a reserved gap is formed between the end of the first structural beam 2 and the first side. Some of the longitudinal main bars have long anchorage sections 21, which extend into the reserved gap and fit against the first side. The remaining longitudinal main bars have short anchorage sections 22, which extend into the reserved gap on the side away from the temporary partition wall 1.

[0033] In a preferred embodiment, the difference in length between the long anchorage section 21 and the short anchorage section 22 is adapted to the minimum anchorage length of the longitudinal main reinforcement of the first structural beam 2. The length of the short anchorage section 22 is greater than or equal to 100 mm. In this embodiment, see [reference needed]. Figure 3 As shown, when the first structural beam is constructed to the first side of the temporary partition wall, the ends of the longitudinal reinforcement bars of the first structural beam extend to the outside of the first structural beam and are staggered by the length Lae (the seismic anchorage length of the longitudinal tension reinforcement bars). The distance from the end face of the first structural beam to the first side of the temporary partition wall is Lae+100mm, which facilitates the subsequent connection with the longitudinal reinforcement bars of the second structural beam.

[0034] All the long and short anchorage sections of the longitudinal reinforcement of the first structural beam are pre-installed with mechanical connection threads, covered with protective caps, and tightly wrapped with tape for proper protection.

[0035] S3: Cut the temporary central partition wall 1 along the ring direction of multiple reserved holes a to form the rear opening b.

[0036] For details, please refer to Figure 5 and Figure 6 As shown, when cutting the temporary partition wall 1, a wire saw is used to cut the temporary partition wall 1 along the ring direction of multiple reserved holes a to form the rear opening b.

[0037] The radius of the rear opening b is 20mm larger than the radius of the through position d.

[0038] like Figure 6As shown, when constructing the basement structure on the second side of the temporary partition wall, before constructing the second structural beam, locate the reserved holes in the temporary partition wall (i.e., the sleeves pre-embedded in step S1), cut them with a wire saw, and then remove the fragments of the temporary partition wall after cutting, and connect the second structural beam.

[0039] S4: Construct the second structural beam 3 in the second-stage sub-pit corresponding to the second side, so that the end of the second structural beam 3 passes through the rear opening b and is connected to the end of the first structural beam 2. Some of the longitudinal main bars of the second structural beam 3 are connected to the long anchorage section 21, and the remaining longitudinal main bars of the second structural beam 3 are connected to the short anchorage section 22.

[0040] The steps involved in constructing the second structural beam 3 include:

[0041] S41, Construct a brick formwork 43 at the bottom side wall of the rear opening b.

[0042] S42. The first segment bottom mold 41 is erected below the reserved gap.

[0043] S43. Therefore, the second segment bottom formwork 42 is erected on the second side, so that the brick formwork 43 is spliced ​​with the first segment bottom formwork and the second segment bottom formwork 42 to form the bottom formwork of the beam.

[0044] S44. Cast the second structural beam 3 on the bottom formwork of the beam.

[0045] As a preferred implementation method, the brick formwork is constructed using solid concrete bricks. Specifically, during the construction of the second structural beam, the bottom area of ​​the beam within the rear opening is constructed using solid concrete bricks, extending up to the bottom of the second structural beam. Formwork supports are erected on both sides of the temporary partition wall. The end faces of the first structural beam are chiseled, and the longitudinal reinforcement of the second structural beam is connected to the long and short anchorage sections of the first structural beam using mechanical connecting sleeves. Finally, the concrete pouring of the second structural beam is completed.

[0046] The present invention discloses a construction method for structural beams on both sides of a temporary partition wall. This method involves creating pre-reserved holes during the pouring of the temporary partition wall to pre-lay out the opening at the penetration point of the subsequent structural beam through the temporary partition wall. When constructing the first structural beam on the first side of the temporary partition wall, the ends of the longitudinal reinforcing bars of the first structural beam are staggered according to Lae, so that the construction joint of the structural beam is located at a distance of Lae+100mm from the temporary partition wall. When constructing the second structural beam on the second side of the temporary partition wall, a hole is made at the corresponding position in the temporary partition wall to form the opening, connecting the second structural beam to the first structural beam. A brick formwork is used to support the area between the bottom of the second structural beam and the temporary partition wall, thereby improving the construction efficiency of the second structural beam. The construction method for the structural beams on both sides of the temporary partition wall of the present invention avoids setting construction joints on both sides of the temporary partition wall and then connecting the two structures after the temporary partition wall is demolished. Instead, it adopts a rear opening, and then the second structural beam passes through the rear opening, which reduces the construction error of the connection between the first and second structural beams, avoids the misalignment of the beams on both sides of the temporary partition wall, and the longitudinal reinforcement of the first and second structural beams can all be connected by sleeve mechanical connection, reducing safety hazards.

[0047] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A method for constructing structural beams on both sides of a temporary partition wall, characterized in that, Includes the following steps: A temporary partition wall is constructed in the foundation pit. The temporary partition wall has a first side and a second side. Multiple reserved holes are formed on the outside of the corresponding structural beam of the temporary partition wall at the penetration position. The multiple reserved holes are arranged in a ring along the circumferential direction of the penetration position. The first structural beam is constructed in the first-phase pit corresponding to the first side, so that a reserved gap is formed between the end of the first structural beam and the first side. Some of the longitudinal main bars have long anchorage sections, which extend into the reserved gap and fit against the first side. The remaining longitudinal main bars have short anchorage sections, which extend into the reserved gap on the side away from the temporary partition wall. The temporary partition wall is cut along the circumferential direction of the plurality of pre-reserved holes to form a rear opening; Construct a second structural beam in the second-phase sub-pit corresponding to the second side, such that the end of the second structural beam passes through the rear opening and is connected to the end of the first structural beam, a portion of the longitudinal main reinforcement of the second structural beam is connected to the long anchorage section, and the remaining longitudinal main reinforcement of the second structural beam is connected to the short anchorage section. The steps for constructing the second structural beam include: building a brick formwork on the bottom side wall of the rear opening; erecting a first segmented bottom formwork below the reserved gap; erecting a second segmented bottom formwork on the second side, so that the brick formwork is spliced ​​with the first segmented bottom formwork and the second segmented bottom formwork to form a beam bottom formwork; and casting the second structural beam on the beam bottom formwork.

2. The construction method for the structural beams on both sides of the temporary partition wall according to claim 1, characterized in that, The difference in length between the long anchorage section and the short anchorage section is adapted to the minimum anchorage length of the longitudinal main reinforcement of the first structural beam.

3. The construction method for the structural beams on both sides of the temporary partition wall according to claim 2, characterized in that, The length of the short anchoring section is greater than or equal to 100 mm.

4. The construction method for the structural beams on both sides of the temporary partition wall according to claim 1, characterized in that, The radius of the rear opening is 20 mm larger than the radius of the through-hole.

5. The construction method for the structural beams on both sides of the temporary partition wall according to claim 1, characterized in that, During the construction of the temporary partition wall, a reinforcing steel structure is embedded in the temporary partition wall, and the reinforcing steel structure is arranged in a circle along the circumferential direction of the rear opening to form a closed structure.

6. The construction method for the structural beams on both sides of the temporary partition wall according to claim 1, characterized in that, When cutting the temporary partition wall, a wire saw is used to cut the temporary partition wall along the ring direction of the plurality of reserved holes to form the rear opening.

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