Guide wall formwork structure for diaphragm wall and construction method

Abstract

The invention relates to the technical field of building construction, in particular to a guide wall formwork erecting structure for an underground diaphragm wall and a construction method, and discloses a plurality of positioning ribs arranged at design positions of guide walls to be poured, two guide walls to be poured are oppositely arranged, and combined formworks erected at the design positions of the guide walls to be poured. The back sides of the connecting plates are attached to the corresponding positioning ribs to support and connect the inner supporting pieces between the two opposite combined formworks, the connecting plates and the supporting rods are connected together through the splicing plates to form the combined formworks, and then the inner supporting pieces formed by the vertical pipes and the transverse ribs are placed between the combined formworks on the two sides to support the combined formworks on the two sides. The combined formwork is more stable during supporting, the structure is easy to manufacture, construction and installation are rapid and practical, the operation process is safe and reliable, the combined formwork can be supported through the inner supporting piece, the problems of deformation and deviation of the combined formwork in the using process are not prone to occurring, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a guide wall formwork structure for a ground-connected wall and a construction method. Background Art

[0002] The guide wall is a construction measure built by the construction unit before the underground continuous wall is formed into a groove wall. During the construction of the existing conventional ground-connected wall guide wall, the wooden formwork is first assembled in place, and then the secondary keel and the main keel are installed. Finally, steel pipes, top supports and step-by-step tightening are used for support and reinforcement. However, in the prior art, the installation process of the guide wall formwork is cumbersome after production, the construction efficiency is low, and the formwork is prone to deformation and displacement. Therefore, it is necessary to provide measures to solve the problems of cumbersome installation process of the formwork after production, low construction efficiency, and easy deformation and displacement of the formwork. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a guide wall formwork structure and a construction method for ground-connected walls, so as to solve the problems that the existing formwork has cumbersome installation procedures after production, low construction efficiency, and the formwork is prone to deformation and displacement.

[0004] The technical solution to achieve the above object is: a guide wall formwork structure for ground-connected walls and a construction method, comprising:

[0005] A plurality of positioning bars are arranged at the designed positions of the guide wall to be cast, wherein the guide wall to be cast has two and is arranged opposite to each other;

[0006] The combined formwork is supported at the designed position of the guide wall to be poured, and the back side is arranged in contact with the corresponding positioning ribs;

[0007] An inner support member supporting and connecting two opposite combined formworks;

[0008] The tie rod is inserted into the top of two opposite combination templates.

[0009] The technical solution of the present invention is further improved in that: the combined formwork includes a connecting plate close to the guide wall to be cast, a plurality of splicing plates connected to the connecting plate, and support rods connected to both ends of the splicing plates.

[0010] A further improvement of the technical solution of the present invention is that the splicing plates are arranged at intervals.

[0011] The technical solution of the present invention is further improved in that: the splicing plate is perpendicular to the support rod.

[0012] The technical solution of the present invention is further improved in that: the support rod and the connecting plate are at the same height.

[0013] The technical solution of the present invention is further improved in that: the spliced ​​boards are square wood.

[0014] The technical solution of the present invention is further improved in that: the tie rod is arranged in a U shape.

[0015] The technical solution of the present invention is further improved in that: the inner support member includes a plurality of vertical tubes connected to the combined formwork and a plurality of transverse ribs connected to the two adjacent vertical tubes.

[0016] The technical solution of the present invention is further improved in that: the transverse ribs are arranged at intervals on the vertical tubes.

[0017] A construction method for a guide wall formwork structure for a ground-connected wall comprises the following steps:

[0018] Providing positioning bars, and placing the positioning bars at the designed position of the guide wall to be poured;

[0019] Providing a combined formwork, supporting the combined formwork at the designed position of the guide wall to be cast and making the back side of the combined formwork abut against the positioning ribs;

[0020] Providing an inner support member, and supporting the inner support member between two oppositely arranged combined templates;

[0021] A tie rod is provided and the tie rod is clamped on the top of two relatively arranged combination templates.

[0022] By using the above technical solution, the present invention has the following technical effects compared with the prior art:

[0023] The present invention provides a guide wall formwork structure and a construction method for a ground-connected wall. A connecting plate and a support rod are connected together through a splicing plate to form a combined formwork. An inner support member formed by a vertical tube and a transverse rib is placed between the combined formworks on both sides to support the combined formworks on both sides, making the combined formworks more stable when supported. The structure is simple to manufacture, the construction and installation are quick and practical, the operation process is safe and reliable, and the combined formwork can be supported by the inner support member, making it less likely for the combined formwork to be deformed or misaligned during use, thereby improving construction efficiency.

[0024] In the present invention, both the connecting plate and the splicing plate are made of wood material, and the overall weight is light, so that the splicing plate is easier to carry after being fixed to the connecting plate, and is easy to replace and maintain during use, which is conducive to civilized construction management. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a schematic diagram of the connection between a combined formwork and an inner support member of a guide wall formwork structure and a construction method for a ground-connected wall.

[0026] Figure 2 The present invention is a front view of a combined formwork structure for a guide wall support structure and a construction method for a ground-connected wall.

[0027] Figure 3 The present invention is a side view of a combined formwork structure for a guide wall support structure and a construction method for a ground-connected wall.

[0028] Figure 4 The present invention is a top view of a combined formwork structure for a guide wall formwork structure and a construction method for a ground-connected wall.

[0029] Figure 5 The present invention is a front view of an inner support member of a guide wall formwork structure and a construction method for a ground-connected wall.

[0030] Figure 6 The present invention is a guide wall schematic diagram of a guide wall formwork structure and a construction method for a ground-connected wall.

[0031] Figure 7 The present invention is a schematic diagram of the trench wall excavation of a ground-connected wall according to a guide wall formwork structure and a construction method thereof.

[0032] Figure 8 The present invention is a three-dimensional diagram of a combined formwork structure for a guide wall support structure and a construction method for a ground-connected wall.

[0033] In the figure: A, guide wall; B, ground-connected wall groove wall; 1, connecting plate; 2, splicing plate; 3, support rod; 4, vertical pipe; 5, transverse reinforcement; 6, tension reinforcement; 7, positioning reinforcement. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] The present invention provides a guide wall formwork structure and a construction method for a ground-connected wall. The guide wall formwork structure is composed of a splicing plate that connects a connecting plate and a support rod together to form a combined formwork and an internal support member composed of a vertical tube and a transverse rib. The combined formwork is used to support the guide wall, and the internal support member is used to return the combined formwork on both sides to the top position, so that the combined formwork is overall stable and not prone to deformation and displacement. The ground-connected wall guide wall formwork and the construction method are described below.

[0036] Combine the following Figures 1 to 8 , the structure of the ground-connected wall guide formwork and the construction method of the present invention are explained.

[0037] See also Figure 1The present invention provides a guide wall formwork structure for a ground-connected wall, comprising: tie bars 6, positioning bars 7, combined formwork, and internal support members. The positioning bars 7 are arranged at the designed position of the guide wall A to be cast, and a plurality of them are provided. There are two guide walls A to be cast and they are arranged opposite to each other. The combined formwork is supported at the designed position of the guide wall A to be cast, and the back side is arranged in contact with the corresponding positioning bars 7. The internal support members support and connect the two opposite combined formworks, and the tie bars 6 are clamped on the tops of the two opposite combined formworks.

[0038] The combined formwork of the present invention can block the poured concrete during the construction process, which is beneficial to the solidification of the concrete to form the wall A. The internal support member of the present invention can support the combined formwork, so that the combined formwork will not be deviated during the construction process, which is more beneficial to improving the quality of the concrete.

[0039] Preferably, if Figure 1 As shown, when setting up the ground-connected wall, the groove walls on both sides of the ground-connected wall need to be reinforced. Therefore, guide walls need to be set on the groove walls on both sides of the ground-connected wall to achieve the effect of reinforcing the groove walls of the ground-connected wall. Therefore, the guide walls to be cast need to be set to two groove walls.

[0040] See also Figures 1 to 4 In a specific embodiment of the present invention, the combined formwork includes a connecting plate 1 close to the guide wall A to be cast, a plurality of splicing plates 2 connected to the connecting plate 1, and support rods 3 connected to both ends of the splicing plates 2, the splicing plates 2 are arranged at intervals, and the splicing plates 2 are perpendicular to the support rods 3.

[0041] See also Figure 2 and Figure 8 In a specific embodiment of the present invention, the support rod 3 is consistent in height with the connecting plate 1, and the splicing plate 2 is a square wood.

[0042] Furthermore, if Figure 2 and Figure 8 As shown, by setting the height of the support rod 3 to be consistent with the height of the connecting plate 1, the support rod 3 can better support the connecting plate 1 and the splicing plate 2 when erected.

[0043] Furthermore, the splicing board 2 is made of square wood, and the connecting board 1 is a 1.83*0.92m glued wood formwork. Both are made of wood and have a light overall weight, making the splicing board 2 easier to carry after being fixed to the connecting board 1, and easy to replace and maintain during use, which is conducive to civilized construction management.

[0044] See also Figure 1 In a specific embodiment of the present invention, the tie rod 6 is arranged in a U shape.

[0045] Furthermore, if Figure 1As shown, by setting the tie rod 6 into a U shape so that it can be placed on the top of the combined formwork, the two relatively arranged combined formworks can be fixed so that the combined formworks will not be offset when erected in the ground-connected wall groove wall B.

[0046] See also Figure 1 and Figure 5 In a specific embodiment of the present invention, the inner support member includes a plurality of vertical tubes 4 connected to the combined formwork and a plurality of transverse ribs 5 connected to two adjacent vertical tubes 4 .

[0047] Furthermore, if Figure 1 and Figure 5 As shown, the transverse ribs 5 are welded to the vertical tubes 4 at intervals to support them more stably, thereby improving the stability of the vertical tubes 4 in supporting the combined formwork.

[0048] Furthermore, the length of the transverse rib 5 is equal to the designed clearance width of the two guide walls A minus the thickness of the combined formwork on both sides minus the width of the two vertical tubes 4.

[0049] See also Figure 1 and Figure 5 In a specific embodiment of the present invention, the transverse ribs 5 are arranged at intervals on the vertical tubes 4.

[0050] Furthermore, if Figure 1 and Figure 5 As shown, two adjacent vertical tubes 4 are connected together by using a plurality of transverse ribs 5. The length of the transverse ribs 5 plus the diameter of the vertical tube 4 enable the vertical tube 4 to fully squeeze the splicing plates 2 on both sides when supported vertically, so that the splicing plates 2 are not easily deformed, thereby improving the quality of concrete pouring.

[0051] The present invention provides a construction method for a guide wall formwork structure for a ground-connected wall, comprising the following steps:

[0052] Providing positioning ribs 7, and placing the positioning ribs 7 at the designed position of the guide wall A to be cast;

[0053] Providing a combined formwork, supporting the combined formwork at the designed position of the guide wall A to be cast and making the back side of the combined formwork abut against the positioning rib 7;

[0054] Providing an inner support member, and supporting the inner support member between two oppositely arranged combined templates;

[0055] A tie rod 6 is provided, and the tie rod 6 is clamped on the top of two relatively arranged combined templates.

[0056] The present invention also provides a construction process for a guide wall formwork structure for a ground-connected wall, and the construction process is described below;

[0057] The specific construction process is as follows:

[0058] (1) Measurement and positioning

[0059] When measuring and laying out, the guide wall axis is placed 150mm outside the design axis to ensure that the continuous wall structure does not invade the interior of the foundation pit. After the guide wall is measured and positioned, the guide wall edge line is marked with lines and painted.

[0060] (2) Guide wall excavation

[0061] When excavating the guide wall, the concrete pavement cutting machine is used to cut and break the outer edge, and the excavator is used to vertically excavate along the measurement positioning line until the bottom of the guide wall, and it is assisted by manual trimming. The surveying personnel will review the elevation of the bottom of the guide wall in time, and over-excavation is strictly prohibited. During the excavation process, pay attention to protecting the excavated trench wall to prevent the excavated trench wall from being damaged by the excavator.

[0062] (3) Pouring of cushion layer

[0063] Pour a 10mm thick C20 concrete cushion layer at the bottom of the guide wall A for leveling. After the cushion layer is poured, place the edge line of the guide wall facade as the template installation control line.

[0064] (4) Processing and installation of guide wall reinforcement

[0065] The guide wall steel bars are processed and installed according to the design drawings and technical specifications, and the steel bars are connected by binding and overlapping.

[0066] (5) Installation steps of combined formwork system

[0067] 1) Apply release agent to the combined formwork before use.

[0068] 2) Drive C12@500 positioning steel bars along the edge of the guide wall facade to fix the base of the combined formwork to prevent it from shifting due to the lack of fixing measures for the base of the formwork during concrete pouring.

[0069] 3) The fixed installation sequence of the guide wall formwork should be carried out in a single direction from one end to the other. Before installing the formwork, construction control lines should be arranged at both ends of the formwork to control the position of the upper end of the combined formwork.

[0070] 4) The combined formwork is manually placed on the left and right sides of the guide wall A. During installation, first stick the bottom of the combined formwork to the positioning steel bars, then adjust the longitudinal positions of the combined formwork on the left and right sides to be flush, and then use the internal support to support the combined formwork on the left and right sides one by one. The support positions are the two ends and the middle of each combined formwork, a total of 3. After the installation is completed, check the verticality and flatness of the combined formwork. Follow this method to complete the installation and fixation of the combined formwork in turn. After the installation and fixation of the second group of combined formwork is completed, use square wood to connect and reinforce the first and second groups of combined formwork to form a whole, and install and fix them one by one in this direction.

[0071] 5) After the combined formwork and internal supports are installed, use C25 "U"-shaped tie bars to lock the upper end of the combined formwork, and then use square wood to support the top on the outer side of the upper end of the combined formwork. The spacing between the locking and the support is consistent with the spacing of the internal supports.

[0072] (6) Concrete pouring;

[0073] Before pouring concrete, the axis of the guide wall should be checked and the reinforcement of the formwork should be checked. During the pouring process, the reinforcement team and the carpentry team should assign special personnel to be on duty, and the two sides of the guide wall must be poured symmetrically to ensure that the formwork is stressed evenly.

[0074] (7) Guide wall structure top support;

[0075] After the guide wall formwork is removed, in order to prevent the guide wall from deformation and displacement, 100×150mm wooden supports are required to support the guide walls A on both sides.

[0076] (8) Key points of guide wall construction.

[0077] 1) Make good construction preparations and arrange the process. The guide wall construction should be carried out continuously from earth excavation to concrete pouring;

[0078] 2) Use plastic film to cover and sprinkle water to strengthen the maintenance of concrete;

[0079] 3) When the concrete strength of the guide wall A reaches the point where there will be no missing edges or corners, the formwork can be removed. After the formwork is removed, the opposite supports should be set up in a timely manner with a horizontal spacing of 1.5m and a spacing of 75cm from top to bottom. The supports should be made of 100×150 square wood. Backfilling should be carried out first when the guide wall is shelved for a long time to ensure the vertical accuracy and stability of the guide wall.

[0080] 4) If the guide wall does not reach the designed strength, heavy equipment is prohibited from approaching and loading is not allowed on the guide wall.

[0081] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A guide wall formwork structure for a ground-connected wall, characterized in that: include: A plurality of positioning bars are arranged at the designed positions of the guide wall to be cast, wherein the guide wall to be cast has two and is arranged opposite to each other; The combined formwork is supported at the designed position of the guide wall to be poured, and the back side is arranged in contact with the corresponding positioning ribs; An inner support member supporting and connecting two opposite combined formworks; The tie rod is inserted into the top of two opposite combination templates.

2. A guide wall formwork structure for ground-connected walls according to claim 1, characterized in that: The combined formwork comprises a connecting plate close to the guide wall to be cast, a plurality of splicing plates connected to the connecting plate, and supporting rods connected to both ends of the splicing plates.

3. A guide wall formwork structure for ground-connected walls according to claim 2, characterized in that: The splicing plates are arranged at intervals.

4. The guide wall formwork structure for ground-connected walls according to claim 2, characterized in that: The splicing plate is perpendicular to the support rod.

5. The guide wall formwork structure for ground-connected walls according to claim 2, characterized in that: The support rod is consistent in height with the connecting plate.

6. The guide wall formwork structure for ground-connected walls according to claim 2, characterized in that: The spliced ​​board is square wood.

7. The guide wall formwork structure for ground-connected walls according to claim 1, characterized in that: The tensioning rod is arranged in a U shape.

8. The guide wall formwork structure for ground-connected walls according to claim 1, characterized in that: The inner support member includes a plurality of vertical tubes connected to the combined formwork and a plurality of transverse ribs connected to two adjacent vertical tubes.

9. A guide wall formwork structure for ground-connected walls according to claim 8, characterized in that: The transverse ribs are arranged at intervals on the vertical tubes.

10. The construction method of the guide wall formwork structure for ground-connected wall according to claim 1, characterized in that: The following steps are involved: Providing positioning bars, and placing the positioning bars at the designed position of the guide wall to be poured; Providing a combined formwork, supporting the combined formwork at the designed position of the guide wall to be cast and making the back side of the combined formwork abut against the positioning ribs; Providing an inner support member, and supporting the inner support member between two oppositely arranged combined templates; A tie rod is provided and the tie rod is clamped on the top of two relatively arranged combination templates.

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