Guide wall device for construction of underground continuous wall and pouring method of underground continuous wall

Abstract

The present application relates to a kind of underground continuous wall construction method, comprising the following steps: excavate trench in underground continuous wall design position;Provide guide wall device for construction underground continuous wall, guide wall device for construction underground continuous wall is provided with oppositely arranged side formwork and end formwork connected between the end of side formwork, guide wall device for construction underground continuous wall is placed in trench;Pour concrete into the gap between side formwork and trench to form guide wall;After concrete solidification, underground continuous wall is constructed between side formwork;After underground continuous wall construction is completed, guide wall device for construction underground continuous wall is hoisted to next construction position and the above-mentioned step is recycled, and guide wall device for construction underground continuous wall makes trench, side formwork and operation platform form a containing space, and the concrete in the containing space is poured by the through hole provided on operation platform, the soil on the side of trench is reinforced, and the device can be stably placed in trench.

Description

Technical Field

[0001] This invention relates to the field of diaphragm wall engineering, and specifically to a guide wall device for constructing diaphragm walls and a method for pouring diaphragm walls. Background Technology

[0002] Currently, diaphragm wall support is frequently used in deep foundation pit engineering. Before diaphragm wall construction, guide wall construction is required. The guide wall construction process is as follows: first, measurement and positioning are carried out, then the excavator digs the trench, followed by rebar binding, formwork erection, and concrete pouring. Once the concrete reaches the design strength, the guide wall construction is completed, and diaphragm wall excavation can proceed.

[0003] When there are many sections and a long length of diaphragm wall, the construction of the guide wall will consume a lot of concrete, steel bars, manpower and machinery, and require a lot of formwork. The erection of the formwork also requires a lot of time and measurement and acceptance of the formwork. This process is long and costly, which greatly increases the construction cost and construction period. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the prior art and provide a guide wall device for constructing underground continuous walls and a method for pouring underground continuous walls. This solves the problem that when there are many sections and long lengths of underground continuous walls, the guide wall operation consumes a lot of concrete, steel bars, manpower, and machinery, requires a lot of formwork, and the formwork erection also requires a lot of time and measurement and acceptance. This process is long and costly, which greatly increases the construction cost and construction period.

[0005] The technical solution to achieve the above objectives is:

[0006] This invention provides a construction method for a diaphragm wall, comprising the following steps:

[0007] Excavate a trench at the designed location of the underground continuous wall;

[0008] A guide wall device for constructing a diaphragm wall is provided. The guide wall device for constructing a diaphragm wall is provided with side templates arranged opposite each other and end templates connected between the ends of the side templates. The guide wall device for constructing a diaphragm wall is placed in the trench.

[0009] Concrete is poured into the gap between the side template and the trench to form a guide wall;

[0010] After the concrete has hardened, the diaphragm wall is constructed between the side formwork.

[0011] After the diaphragm wall construction is completed, the guide wall device used for diaphragm wall construction is hoisted to the next construction position and the above steps are repeated.

[0012] A further improvement of the construction method of the underground continuous wall of the present invention is that the guide wall device for constructing the underground continuous wall further includes a working platform disposed at the top of the side formwork and the end formwork, the working platform having an opening at the position between the side formwork and the end formwork, and the working platform having through holes on both sides corresponding to the opening;

[0013] It also includes the following steps:

[0014] When pouring concrete into the gap between the side template and the trench, the concrete is poured through the through hole.

[0015] A further improvement of the construction method for the underground diaphragm wall of the present invention is that it further includes the following steps:

[0016] When the guide wall device for constructing the underground continuous wall is placed in the trench, the bottom of the side formwork and the end formwork is embedded in the bottom surface of the trench.

[0017] A further improvement of the construction method for the underground diaphragm wall of the present invention is that it further includes the following steps:

[0018] When the guide wall device used for constructing the diaphragm wall is hoisted to the next construction position, the end of the side formwork away from the end formwork is attached to the already constructed diaphragm wall.

[0019] A further improvement of the construction method for the underground diaphragm wall of the present invention is that it further includes the following steps:

[0020] While excavating the trench, excavation continues outward from the top of the trench;

[0021] When pouring concrete into the gap between the side template and the trench, concrete is also poured into the outer part of the top of the trench.

[0022] A further improvement of the construction method for the underground diaphragm wall of the present invention is that it further includes the following steps:

[0023] Before placing the guide wall device for constructing the underground continuous wall, apply a release agent to the outer side of the side formwork and the end formwork, as well as to the bottom of the working platform.

[0024] The present invention also provides a guide wall device for constructing underground diaphragm walls, comprising:

[0025] Two side templates set vertically relative to each other;

[0026] An end template is vertically arranged between the side templates, and the end template is connected to the end of the side template.

[0027] A further improvement of the guide wall device for constructing diaphragm walls of the present invention is that it further includes:

[0028] A working platform is provided at the top of the side template and the end template. The length of the working platform is not less than the length of the side template, and the width of the working platform is greater than the length of the end template. The working platform has an opening at the position between the side template and the end template, and through holes are provided on both sides of the opening.

[0029] A further improvement of the guide wall device for constructing diaphragm walls of the present invention is that it further includes:

[0030] A limiting plate is disposed on the side of the side template away from the end template. The other adjacent side of the limiting plate is connected to the working platform. The contour of the side of the limiting plate away from the side template is arc-shaped.

[0031] A further improvement of the present invention for the guide wall device used in the construction of underground continuous walls is that the fixing plate is provided with lifting lugs.

[0032] The beneficial effects of this invention are as follows: the guide wall device for constructing diaphragm walls is placed in the trench and inserted into the bottom and sides of the trench, so that the trench, side formwork, and working platform form a receiving space. Concrete is poured into the receiving space through the through holes set in the working platform to reinforce the soil on the sides of the trench and to make the device stable in the trench. The side formwork and end formwork enclose the construction space. Diaphragm walls can be constructed directly in the trench through the corresponding openings set in the working platform. After the diaphragm wall construction is completed, the device can be removed to carry out the construction of the diaphragm wall at the next location, realizing recycling. Attached Figure Description

[0033] Figure 1 This is a perspective view of the guide wall device of the present invention used for constructing underground continuous walls.

[0034] Figure 2 The trench is used in the method for casting underground continuous walls according to the present invention.

[0035] Figure 3 This is a perspective view of the guide wall device of the present invention for constructing underground continuous walls installed in a guide trench.

[0036] Figure 4 This is a side view of the guide wall device of the present invention for constructing underground continuous walls installed in a guide trench.

[0037] 21. Trench; 31. Side formwork; 32. End formwork; 41. Working platform; 42. Lifting lug; 51. Diaphragm wall. Detailed Implementation

[0038] This invention provides a guide wall device for constructing diaphragm walls and a method for pouring diaphragm walls. It addresses the problems of existing methods where, when constructing numerous and long diaphragm walls, guide wall construction consumes excessive amounts of concrete, steel reinforcement, manpower, and machinery, requires numerous formworks, and involves significant time and measurement and acceptance of these formworks. This process is lengthy, costly, and significantly increases construction costs and timelines. The guide wall device is placed in a trench and inserted into its bottom and sides, creating a space encompassing the trench, side formwork, and working platform. Concrete is poured into this space through through-holes in the working platform, reinforcing the soil on the trench sides and ensuring the device's stable placement within the trench. The side and end formworks enclose the construction space, allowing direct construction of the diaphragm wall within the trench through corresponding openings in the working platform. After the diaphragm wall construction is completed, the device can be dismantled for the next diaphragm wall construction, achieving recycling.

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] See Figure 1 This image shows a perspective view of the guide wall device of the present invention used for constructing diaphragm walls. (See also...) Figure 2 This illustrates the trench in the method for casting the diaphragm wall according to the present invention. (See also...) Figure 3 This image shows a perspective view of the guide wall device of the present invention for constructing diaphragm walls installed in a guide trench. (See also...) Figure 4 The image shows a side view of the guide wall device of the present invention for constructing underground continuous walls installed in a guide trench.

[0041] Combination Figures 1 to 4As shown, the present invention provides a construction method for a diaphragm wall, comprising the following steps: excavating a trench 21 at the location of the diaphragm wall 51; designing the required excavation dimensions of the trench 21 according to the dimensions of the diaphragm wall 51 before excavation; providing a guide wall device for constructing the diaphragm wall, the guide wall device for constructing the diaphragm wall having side templates 31 arranged opposite each other and end templates 32 connected between the ends of the side templates 31; placing the guide wall device for constructing the diaphragm wall in the trench 21; setting the side templates 31 along the horizontal extension direction of the diaphragm wall 51; the dimensions of this device need to be adapted to the dimensions of the trench 21; in particular, the side templates 31 and the trench 21 are aligned along the direction of the diaphragm wall 51. The side formwork 31 and the trench 21 should be tightly fitted together to prevent concrete from seeping out from the gap between them when concrete is poured between them on the side formwork 31 and the trench 21 along the direction perpendicular to the diaphragm wall 51. Concrete is then poured into the gap between the side formwork 31 and the trench 21 to form a guide wall. After the concrete has solidified, the diaphragm wall 51 is constructed between the side formwork 31. After the diaphragm wall 51 is completed, the guide wall device used for constructing the diaphragm wall is hoisted to the next construction position and the above steps are repeated. The end of the side formwork 31 in this device that is away from the end formwork 32 is placed at the junction of the completed diaphragm wall 51 to ensure the continuous stability of the diaphragm wall 51.

[0042] Furthermore, the guide wall device used in the construction method of the diaphragm wall of the present invention for constructing the diaphragm wall also includes a working platform 41 set at the top of the side formwork 31 and the end formwork 32. The working platform 41 has an opening at the position between the side formwork 31 and the end formwork 32, and through holes are provided on both sides of the opening of the working platform 41.

[0043] The construction method of the diaphragm wall of the present invention further includes the following steps: when pouring concrete into the gap between the side formwork 31 and the trench 21, the concrete is poured through the through hole. The working platform 41 can avoid the external environment from affecting the space between the trench 21 and the side formwork 31, ensuring the quality of concrete pouring and ensuring the safety of subsequent diaphragm wall 51 construction.

[0044] Preferably, the construction method of the underground continuous wall of the present invention further includes the following steps: when setting the side formwork 31 along the direction of the underground continuous wall 51, the bottom of the side formwork 31 and the end formwork 32 are inserted into the soil at the bottom of the trench 21, which can make the side formwork 31 and the end formwork 32 more tightly connected with the bottom of the trench 21, preventing the poured concrete from seeping out from the gaps and improving the pouring quality.

[0045] Furthermore, the guide wall device used for constructing the underground continuous wall also includes: a limiting plate set on the side of the side formwork 31 away from the end formwork 32, the other adjacent side of the limiting plate being connected to the working platform 41, and the contour of the side of the limiting plate away from the side formwork 31 being arc-shaped.

[0046] Furthermore, the construction method of the underground continuous wall of the present invention also includes the following steps: when excavating the trench, continue to excavate outward from the top of the trench; when pouring concrete into the gap between the side formwork and the trench, pour concrete into the part of the trench excavated outward from the top of the trench at the same time, so that the shape of the poured concrete is angle steel, thereby improving the stability of the poured concrete.

[0047] The construction method of the diaphragm wall also includes the following steps: when setting the side formwork 31 along the direction of the diaphragm wall 51, the limiting plate is inserted into the soil on the side of the trench 21 to prevent the poured concrete from seeping out from the gap between the side of the trench 21 and the side formwork 31 along the direction of the diaphragm wall 51 to the bottom surface of the trench 21, so as to prevent the seeping concrete from affecting the subsequent construction of the diaphragm wall 51.

[0048] Preferably, the construction method of the diaphragm wall of the present invention further includes the following steps: before placing the guide wall device for constructing the diaphragm wall, apply a release agent to the outer side of the side formwork 31 and the end formwork 32 and the bottom of the working platform 41, so that the device can be removed after the diaphragm wall 51 is constructed, thereby avoiding the device from sticking to the cast concrete and causing damage to the device, and improving the durability of the device.

[0049] Furthermore, the construction method of the underground continuous wall of the present invention also includes the following steps: before repeating the above steps at the next construction position, the concrete that seeped out between the trench 21 and the side formwork 31 during concrete pouring is removed, so as to facilitate the subsequent construction of the underground continuous wall 51 in the trench 21.

[0050] The following is a further description of a guide wall device for constructing underground continuous walls provided by the present invention.

[0051] The present invention provides a guide wall device for constructing a diaphragm wall, comprising: two side templates 31 arranged vertically relative to each other and an end template 32 arranged vertically between the side templates 31. The end template 32 is connected to the end of the side templates 31. This device is set in the trench 21 when constructing the diaphragm wall 51, and the side templates 31 and the end templates 32 serve as templates for pouring concrete.

[0052] The guide wall device for constructing underground continuous walls of the present invention further includes: a working platform 41 set at the top of the side formwork 31 and the end formwork 32. The length of the working platform 41 is not less than the length of the side formwork 31, and the width of the working platform 41 is greater than the length of the end formwork 32. The working platform 41 and the side formwork 31 enclose a pouring space. The working platform 41 has an opening at the position between the side formwork 31 and the end formwork 32. The working platform 41 has through holes on both sides of the opening. The through holes are used as channels for pouring concrete. Concrete is poured into the pouring space through the through holes to reinforce the soil on the side of the trench 21.

[0053] The guide wall device for constructing diaphragm walls of the present invention further includes: a limiting plate disposed on the side of the side formwork 31 away from the end formwork 32, the other adjacent side of the limiting plate being connected to the working platform 41, the contour of the side of the limiting plate away from the side formwork 31 being arc-shaped, the arc shape being adapted to the side contour of the trench 21, facilitating the insertion of the limiting plate into the soil on the side of the trench 21, preventing the poured concrete from leaking out from the gap between the trench 21 and the side formwork 31, and avoiding the need for repair due to excessive concrete leakage in the trench 21 when constructing the next section of diaphragm wall 51.

[0054] Furthermore, in the guide wall device for constructing diaphragm walls of the present invention, the working platform 41 is a fixed plate. The length and width of the fixed plate are both greater than the length and width of the side template 31 and the end template 32. The fixed plate has an opening above the side template 31 and the end template 32. The opening is connected to the space where the side template 31 and the end template 32 are erected, so that after the device is placed in the trench 21, the diaphragm wall 51 can be constructed on the bottom surface of the trench 21 through the opening on the fixed plate. The through holes are set on both sides of the opening to realize the pouring of concrete into the gap between the trench 21 and the device.

[0055] Preferably, the fixing plate of the guide wall device for constructing underground continuous walls of the present invention is provided with lifting lugs 42 for connecting with a crane when hoisting the device.

[0056] Specifically, in a preferred embodiment of the guide wall device for constructing underground continuous walls according to the present invention, multiple lifting lugs 42 are provided, and the multiple lifting lugs 42 are symmetrically arranged on the fixed plate, so that the crane can more stably lift the device.

[0057] Furthermore, the bottom of the end template 32 and the side template 31 in the guide wall device for constructing underground continuous walls of the present invention are wedge-shaped, so that when the device is set in the trench 21, it is easier to insert the bottom of the end template 32 and the side template 31 into the soil of the trench 21, making the accommodating space formed by the device and the trench 21 more sealed, and preventing leakage of subsequent concrete pouring.

[0058] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A construction method for a diaphragm wall, characterized in that, Includes the following steps: Excavate a trench at the designed location of the underground continuous wall, and continue excavating outward from the top of the trench; A guide wall device for constructing diaphragm walls is provided. The guide wall device for constructing diaphragm walls includes side templates arranged opposite each other and end templates connected between the ends of the side templates. The guide wall device for constructing diaphragm walls includes a working platform disposed at the top of the side templates and the end templates. The length of the working platform is not less than the length of the side templates, and the width of the working platform is greater than the length of the end templates. The working platform has an opening corresponding to the position between the side templates and the end templates, and through holes on both sides corresponding to the opening. The guide wall device for constructing diaphragm walls also includes a limiting plate disposed on the side of the side templates away from the end templates. The other adjacent side of the limiting plate is connected to the working platform. The contour of the side of the limiting plate away from the side templates is arc-shaped. The working platform is provided with lifting lugs. The guide wall device for constructing diaphragm walls is placed in the trench, and the bottoms of the side templates and the end templates are embedded in the bottom surface of the trench. Concrete is poured into the gap between the side template and the trench through the through hole, and concrete is poured into the part of the top of the trench that is excavated outward to form a guide wall. After the concrete has hardened, the diaphragm wall is constructed between the side formwork. After the diaphragm wall construction is completed, the guide wall device used for diaphragm wall construction is hoisted to the next construction position, and the end of the side formwork away from the end formwork is attached to the completed diaphragm wall. The above steps are repeated.

2. The construction method for a diaphragm wall as described in claim 1, characterized in that, It also includes the following steps: Before placing the guide wall device for constructing the underground continuous wall, apply a release agent to the outer side of the side formwork and the end formwork, as well as to the bottom of the working platform.

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