Pouring construction method for large pool wall narrow deformation joint

Abstract

The invention discloses a pouring construction method for a large pool wall narrow deformation joint, which comprises the following steps of: 1, adopting a pouring template for pool wall pouring; 2, designing an L-shaped template as a side template; thirdly, the pouring formwork and the L-shaped formwork are transported to the construction operation position to be installed through a tower crane; fourthly, the four L-shaped formworks are installed on the four edges of the deformation joint correspondingly and fixedly connected with the pouring formwork correspondingly; 5, a water stop belt is installed between the left pool wall and the right pool wall of the deformation joint; sixthly, the pool walls on the left side and the right side of the deformation joint are poured at the same time; seventhly, after pouring is completed, the pouring formwork and the L-shaped formwork are dismantled; compared with the prior art, the L-shaped formwork has the advantages that the pool walls on the two sides can be constructed at the same time through assembling, rapid concrete construction is achieved, operation can be conducted without waiting for the intermittent time of the construction joint technology, and the construction period is shortened.

Description

Technical Field

[0001] The invention relates to the field of construction engineering, and in particular to a pouring construction method for narrow deformation joints of a large pool wall. Background Art

[0002] During the construction of vertical expansion joints in the pool wall of a sewage treatment plant, since the side pool wall is larger, in order to ensure that the design requirements are met, one side of the pool wall is often constructed first. After the concrete strength reaches the design strength requirement, the adjacent side of the pool wall is constructed. In this construction method, the forming quality of the pool wall end face cannot be guaranteed, and the reinforcement effect is very poor when constructing the other side of the pool wall.

[0003] At present, in the traditional construction process of the pool wall deformation joint, the traditional construction process can only use the side formwork for formwork, or insert a foam board in the pool wall deformation joint in advance as a formwork, and then pour concrete, and finally remove the formwork / foam board with steel bars. However, since the width of the deformation joint of this project is only 3cm and the pool wall is high, ordinary formwork cannot be used for formwork; when using foam board to construct partitions, due to the limitation of the material itself, the foam board cannot be effectively fixed. Under the impact of concrete and the vibration force of the vibrating rod, the foam board cannot be effectively in the vertical plane and is easily broken by the impact force of the flowing concrete, resulting in poor molding effect, uneconomical and increased labor.

[0004] During the pouring construction of the pool wall, pouring formwork will be built on both sides of the inner and outer walls of the pool wall respectively. The pouring formwork is divided into two-layer structure, inner formwork and outer formwork. The pouring formwork on both sides is connected and fixed by wire rods. Summary of the invention

[0005] The present invention provides a casting construction method for narrow deformation joints in a large pool wall which solves the above-mentioned problem and can solve the adverse effects on construction period and quality.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a pouring construction method for narrow deformation joints of large pool walls, the method steps are as follows:

[0007] Step 1: Use a casting template for casting the pool wall, wherein the casting template is a double-layer template structure consisting of an inner template and an outer template;

[0008] Step 2: Design an L-shaped template as the side template. The L-shaped template is assembled by welding the side template and the end template. When welding, first fully weld the side template and the end template to form an L-shaped steel template, and then use the angle steel bar to strengthen the welding of the side template and the end template. Long oval bolt holes are left on the side template.

[0009] Step 3: Use a tower crane to transport the casting formwork and L-shaped formwork to the construction site for installation;

[0010] Step 4: Before pouring the deformation joint of the pool wall, first install the casting templates on the left and right sides of the deformation joint, and then install four L-shaped templates on the four edges of the deformation joint respectively, and fix them to the casting templates respectively;

[0011] Step 5: Install the water stop strip between the left and right pool walls of the expansion joint;

[0012] Step 6: Cast the pool walls on both sides of the expansion joint at the same time;

[0013] Step 7: After pouring is completed, remove the pouring formwork and L-shaped formwork;

[0014] Step 8: Cast the expansion joint to complete the casting construction.

[0015] Preferably, in step 2, the height of the L-shaped template is 1500 mm, the side template and the end template are made of 3 mm steel plate, the length of the side template is 300 mm, and the length of the end template is the wall thickness / 2-5 mm.

[0016] Preferably, in step 2, the length of the oblong bolt hole is 150 mm, and the center distance between the oblong bolt holes is 500 mm.

[0017] Preferably, in step four, a wire drawing rod insertion hole is opened on the casting template, and an oblong bolt hole on the side template is opened corresponding to the wire drawing rod insertion hole. The wire drawing rod passes through the wire drawing rod insertion hole and the oblong bolt hole to perform casting templates on the front and rear sides of the pool wall, as well as installation and positioning of the L-shaped template.

[0018] Preferably, in step four, when installing the L-shaped formwork, the side formwork of the L-shaped formwork is located between the inner formwork and the outer formwork of the casting formwork, the oblong bolt hole coincides with the insertion hole of the drawing rod, and the end formwork is vertically arranged close to the inner wall of the deformation joint, and a waterstop installation gap is left between the two end forms on the same side.

[0019] Preferably, a self-locking nut is added to the drawing rod to enhance the stability of the L-shaped template.

[0020] Preferably, in step four, there are multiple groups of L-shaped templates, and the multiple groups of L-shaped templates are arranged in sequence along the height direction of the deformation joint, each group of L-shaped templates consists of four L-shaped templates, and the L-shaped templates are all tightly attached to the pool wall, two of which are fixed on the casting template on the left side of the deformation joint, and the other two L-shaped templates are fixed on the casting template on the right side of the deformation joint.

[0021] Preferably, the two L-shaped templates on the same side are fixedly connected by a drawing rod.

[0022] Preferably, the surface of the L-shaped formwork is coated with an interface agent before installation to facilitate demoulding.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] (1) In traditional pool wall construction, one side needs to be constructed first, and then the filling material is used as a template to construct the other side. However, the L-shaped template can be assembled to construct the pool walls on both sides at the same time. It can achieve rapid concrete construction and can be carried out without waiting for the technical interval of the construction joint, thus saving construction time.

[0025] (2) The L-shaped steel mold has a high turnover rate: Since the present invention is welded with a steel mold, and the side mold has a 150mm long oval bolt hole every 200mm, it is suitable for all pool wall heights of this project and is not limited by the pool wall height; it can also be applied to the basement exterior walls of buildings and municipal engineering, and can be widely promoted and used;

[0026] (3) Good deformation joint forming effect: The steel formwork of the present invention has good structural stability, can provide good support for the deformation joint, and has a good deformation joint forming effect; before the steel formwork is installed, the interface agent is applied to facilitate demoulding, so that the quality of the deformation joint can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the construction and assembly of the invention;

[0028] Figure 2 It is a structural schematic diagram of the invented L-shaped template;

[0029] Figure 3 It is a schematic diagram of the combined assembly of the invented L-shaped template;

[0030] Figure 4 For invention Figure 1 Enlarged schematic diagram of part A.

[0031] In the figure: 1. Side form; 2. End form; 3. Angle steel bar; 4. Long oval bolt hole; 5. Tie rod; 6 Waterstop; 7. Casting formwork; 71. Inner formwork; 72. Outer formwork. DETAILED DESCRIPTION

[0032] The present invention will be further described below.

[0033] Example: A pouring construction method for narrow deformation joints in large pool walls, see Figures 1 to 4 , the method steps are as follows:

[0034] Step 1: Use a casting template 7 to cast the pool wall. The casting template 7 is a double-layer template structure consisting of an inner template 71 and an outer template 72;

[0035] Step 2: Design an L-shaped template as the side template.

[0036] The L-shaped template is welded and assembled into a 1500mm high L-shaped template by side mold 1 and end mold 2. When welding, first fully weld the side mold 1 and the end mold 2 to form an L-shaped steel template, and then use (5*5) angle steel bar 3 to strengthen the welding of the side mold 1 and the end mold 2. A 150mm long oval bolt hole 4 is left on the side mold 1, which can be applied to pool walls of different heights; the side mold 1 and the end mold 2 are made of 3mm steel plates, the length of the side mold 1 is 300mm, and the length of the end mold 2 is (pool wall thickness / 2-5mm);

[0037] The side form 1 is used to connect and position with the original casting form 7 of the pool wall, and the end form 2 is used to support the inner wall of the deformation joint. The L-shaped structure formed by the vertical welding of the side form 1 and the end form 2 can be combined in pairs to form a side formwork that is easy to disassemble and supports the inner wall of the deformation joint. The side form 1 has 150mm long oval bolt holes 4 every 200mm, which are used to adapt to the wire drawing rods 5 used to fix the existing casting form 7. The installation of the L-shaped formwork on the casting formwork 7 can be achieved by installing the existing wire drawing rods 5. The design of the long oval bolt holes 4 facilitates the adjustment of the installation height of the L-shaped formwork to be suitable for all pool wall heights of this project, without being restricted by the pool wall height, and is easy to install and disassemble with a high turnover rate.

[0038] Since the L-shaped formwork can be removed from the front and back sides of the pool wall respectively, there is no need to pull it out from the expansion joint during removal. Therefore, it is suitable for pouring construction of narrow expansion joints. For the pouring construction of expansion joints, the L-shaped formwork needs to be used in combination.

[0039] Step 3: Use a tower crane to transport the casting template 7 and the L-shaped template to the construction site for installation;

[0040] Step 4. Before pouring the expansion joint of the pool wall, first install the pouring templates 7 on the left and right sides of the expansion joint, and leave a 3 cm expansion joint between the left and right pouring templates 7, and then install four L-shaped templates in the expansion joint. The four L-shaped templates are respectively installed on the four edges of the expansion joint and are respectively fixedly connected to the pouring templates 7. The pouring template 7 is provided with a wire drawing rod insertion hole, and the oblong bolt hole 4 on the side mold 1 is corresponding to the wire drawing rod insertion hole. The wire drawing rod 5 passes through the wire drawing rod insertion hole and the oblong bolt hole 4 to perform the pouring template 7 on the front and back sides of the pool wall, as well as the installation and positioning of the L-shaped template; a self-locking nut is added to the wire drawing rod 5 to enhance the stability of the L-shaped template.

[0041] When installing the L-shaped template, the side mold 1 of the L-shaped template is located between the inner template 71 and the outer template 72 of the casting template 7, the oblong bolt hole 4 coincides with the insertion hole of the wire drawing rod, and the end mold 2 is vertically arranged close to the inner wall of the deformation joint, and a water stop 6 installation gap is left between the two end molds 2 on the same side. Before the installation of the L-shaped template, the surface is coated with an interface agent to facilitate demoulding;

[0042] Due to the high height of the pool wall and considering the overall strength of the L-shaped formwork, the height of each L-shaped formwork is not more than 1500mm. At this length, the L-shaped formwork has good strength and is very convenient to process and construct. In order to achieve the design in the height direction, the L-shaped formwork is designed into multiple groups, and each group of L-shaped formworks is arranged in sequence along the height direction of the deformation joint to meet the requirements of the height of the pool wall deformation joint.

[0043] In order to support the inner wall of the deformation joint, combined with the structural design of the L-shaped template, each group of L-shaped templates is divided into four L-shaped templates, and the four L-shaped templates are all close to the pool wall. Two of the L-shaped templates are fixed on the casting template 7 on the left side of the deformation joint, one on the inner wall of the pool wall and one on the outer wall of the pool wall. The other two L-shaped templates are fixed on the casting template 7 on the right side of the deformation joint, one on the inner wall and one on the outer wall of the pool wall. The combination of the four L-shaped templates supports the entire inner wall in the deformation joint.

[0044] Step 5: Install the water stop 6 between the left and right pool walls of the deformation joint, and insert the water stop 6 into the installation gap of the water hose clamped between the four L-shaped templates;

[0045] A waterstop 6 is vertically arranged in the deformation joint, and the two sides of the waterstop 6 are respectively cast in the pool walls on both sides. The waterstop 6 is an important component for preventing water leakage in the deformation joint. To facilitate the installation of the waterstop 6, the width of the end mold 2 is the pool wall thickness / 2, and a 10mm gap of the waterstop 6 is left between the end molds 2 on the inner and outer sides. After the four L-shaped templates are installed, the installation gap of the waterstop 6 can be left.

[0046] Step 6: The pool walls on the left and right sides of the expansion joint are poured at the same time;

[0047] Step 7: After pouring is completed, remove the pouring formwork 7 and the L-shaped formwork;

[0048] Step 8: Cast the expansion joint to complete the casting construction.

[0049] To solve the installation problem of the L-shaped formwork on the casting formwork 7, the two L-shaped formworks on the same side are positioned and connected by the drawing rods 5. By utilizing the original drawing rods 5 on the casting formwork 7, the L-shaped formwork can be fixed to the casting formwork 7 on the front and rear sides to achieve installation positioning between the two L-shaped formworks.

[0050] Compared with the traditional process, in the traditional pool wall construction, the narrow deformation joint of 3mm cannot support the side formwork 1, and it is necessary to construct one side of the pool wall first, and then use the filling material as the formwork to construct the other side of the pool wall. The present invention realizes the support of the side formwork 1 in the narrow deformation range through the combined use of L-shaped formworks. After support, the L-shaped formwork can be taken out by lightly tapping, and the removal is very convenient and is not affected by the deformation joint. The pool walls on both sides can be constructed simultaneously, and the concrete construction process is fast and there is no need to wait for the technical interval time of the construction joint to carry out the operation, thereby saving construction time.

[0051] An L-shaped customized steel formwork includes a side formwork and an end formwork. The side formwork 1 and the end formwork 2 are fully welded vertically to form an elongated L-shaped formwork. The side formwork 1 is provided with an elongated elliptical bolt hole 4 for facilitating the passage of a drawing rod 5. The L-shaped formwork is fixed to a casting formwork 7 by a locking nut matching the drawing rod 5. A reinforcing angle steel bar 3 is welded at the welding point between the side formwork 1 and the end formwork 2. The structural connection stability between the side formwork 1 and the end formwork 2 is improved by the angle steel bar 3.

[0052] There are a plurality of oblong bolt holes 4 , which are arranged in sequence and at intervals along the height direction of the side form 1 , and the specific number of the holes 4 matches the tie rod insertion holes on the casting form 7 .

[0053] The width of the side mold 1 is 300 mm, which is convenient for connecting with the drawing rod 5 on the casting template 7, and is clamped between the inner and outer templates 72 of the casting template 7, so it has good stability.

[0054] As a preferred solution, the oblong bolt hole 4 is 150 mm long, the center distance between the oblong bolt holes 4 is 500 mm, and the plate thickness of the side mold 1 and the end mold 2 is 3 mm. This can meet most construction requirements, and the specific parameters can be adjusted according to specific circumstances.

[0055] The above is a detailed introduction to the casting construction method of a narrow deformation joint of a large pool wall provided by the present invention. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope, and changes and improvements to the present invention will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A pouring construction method for narrow deformation joints of large pool walls, characterized in that: The steps are as follows: Step 1: Use a casting template for casting the pool wall, wherein the casting template is a double-layer template structure consisting of an inner template and an outer template; Step 2: Design an L-shaped template as the side template. The L-shaped template is assembled by welding the side template and the end template. When welding, first fully weld the side template and the end template to form an L-shaped steel template, and then use the angle steel bar to strengthen the welding of the side template and the end template. Long oval bolt holes are left on the side template. Step 3: Use a tower crane to transport the casting formwork and L-shaped formwork to the construction site for installation; Step 4: Before pouring the deformation joint of the pool wall, first install the casting templates on the left and right sides of the deformation joint, and then install four L-shaped templates on the four edges of the deformation joint respectively, and fix them to the casting templates respectively; Step 5: Install the water stop strip between the left and right pool walls of the expansion joint; Step 6: Cast the pool walls on both sides of the expansion joint at the same time; Step 7: After pouring is completed, remove the pouring formwork and L-shaped formwork; Step 8: Cast the expansion joint to complete the casting construction.

2. A pouring construction method for narrow deformation joints of large pool walls according to claim 1, characterized in that: In step 2, the height of the L-shaped template is 1500mm, the side template and the end template are made of 3mm steel plate, the length of the side template is 300mm, and the length of the end template is the wall thickness / 2-5mm.

3. A pouring construction method for narrow deformation joints of large pool walls according to claim 1, characterized in that: In step 2, the length of the oblong bolt hole is 150 mm, and the center distance between the oblong bolt holes is 500 mm.

4. A pouring construction method for narrow deformation joints of large pool walls according to claim 1, characterized in that: In step four, a wire drawing rod insertion hole is opened on the casting template, and an oblong bolt hole on the side template is opened corresponding to the wire drawing rod insertion hole. The wire drawing rod passes through the wire drawing rod insertion hole and the oblong bolt hole to perform the casting template on the front and rear sides of the pool wall, as well as the installation and positioning of the L-shaped template.

5. A pouring construction method for narrow deformation joints of large pool walls according to claim 4, characterized in that: In step four, when installing the L-shaped formwork, the side formwork of the L-shaped formwork is located between the inner formwork and the outer formwork of the casting formwork, the oblong bolt hole coincides with the socket of the drawing rod, and the end formwork is vertically arranged close to the inner wall of the deformation joint, leaving a gap for waterstop installation between the two end forms on the same side.

6. A pouring construction method for narrow deformation joints of large pool walls according to claim 5, characterized in that: Add a self-locking nut to the drawing rod.

7. The pouring construction method of a narrow deformation joint of a large pool wall according to claim 1, characterized in that: In step four, there are multiple groups of L-shaped templates, and the multiple groups of L-shaped templates are arranged in sequence along the height direction of the deformation joint. Each group of L-shaped templates is composed of four L-shaped templates. The L-shaped templates are all tightly attached to the pool wall, two of which are fixed on the casting template on the left side of the deformation joint, and the other two L-shaped templates are fixed on the casting template on the right side of the deformation joint.

8. A pouring construction method for narrow deformation joints of large pool walls according to claim 7, characterized in that: The two L-shaped templates on the same side are fixedly connected by a pair of drawing rods.

9. A pouring construction method for narrow deformation joints of large pool walls according to claim 7, characterized in that: Before installation, the L-shaped template is coated with an interface agent on its surface.

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