Method for opening communication opening between adjacent basements partitioned by closed shear wall and bored pile

Abstract

The application discloses a method for opening a communication port between adjacent basements separated by a cast-in-place pile and a closed shear wall, and comprises the following steps: 1, chiseling off the upper part of the cast-in-place pile (1) in the pile chiseling-off area; 2, constructing a new crown beam (4) in the pile chiseling-off area and connecting the cast-in-place pile; 3, opening first holes (7) on the shear wall (6) at intervals; 4, opening second holes (8) in the cast-in-place pile in the new communication port area and connecting the second holes (8) with the first holes (7); 5, erecting a support beam structure and arranging a back-up structure (12) at the bottom of the support beam structure; 6, chiseling off the piles and the shear wall in the new communication port area; 7, pouring a lintel (51) and a side column (52); 8, removing the support beam structure and the back-up structure; and 9, pouring and forming the new communication port. The application can meet the requirements of changing the opening position of the communication port between adjacent basements separated by a cast-in-place pile and adding new construction under the closed working condition of the shear wall.

Description

TECHNICAL FIELD

[0001] The present application relates to a basement communication opening construction method, in particular to a method for opening a communication opening between adjacent basements separated by a closed shear wall and a cast-in-place pile. BACKGROUND

[0002] In the foundation pit construction of underground structures such as basements, pile rows can be used as retaining structures, and adjacent two basement structures can be separated by pile rows and shear walls constructed outside the pile rows.

[0003] In a certain construction project, pile rows formed by cast-in-place piles are used to separate two adjacent basements, and shear walls are constructed on both sides of the pile rows. Considering the need for communication between the two basements, a communication opening is reserved on the shear wall. After the underground structure is completed, the cast-in-place pile row at the communication opening is removed to realize the communication between the two basements. However, in actual construction, due to design changes and optimization requirements, the position of the communication opening between the two basements changes or a new communication opening needs to be added. Since the shear wall has been constructed and closed, it cannot meet the changing or additional construction requirements of the communication opening between the two basements. When the shear wall and the cast-in-place pile are removed, the upper cast-in-place pile is prone to collapse due to the loss of support and gravity, and the construction of the shear wall and the cast-in-place pile is difficult, which can easily cause the upper structure to settle or lose stability, posing a great safety hazard.

[0004] Therefore, it is necessary to provide a method for opening a communication opening between adjacent basements separated by a closed shear wall and a cast-in-place pile, which can meet the changing and additional construction requirements of the opening position of the communication opening between adjacent basements separated by a cast-in-place pile under the closed working condition of the shear wall. SUMMARY

[0005] The purpose of the present application is to provide a method for opening a communication opening between adjacent basements separated by a closed shear wall and a cast-in-place pile, which can meet the changing and additional construction requirements of the opening position of the communication opening between adjacent basements separated by a cast-in-place pile under the closed working condition of the shear wall.

[0006] The present application is implemented as follows:

[0007] A method for opening a communication opening between adjacent basements separated by a closed shear wall and a cast-in-place pile, comprising the following steps:

[0008] Step 1: Determine the pile row removal area according to the position of the new communication opening, and remove the upper part of the cast-in-place pile in the pile row removal area;

[0009] Step 2: Construct a new crown beam in the pile row removal area, so that the new crown beam is connected to the top of the removed pile row;

[0010] Step 3: Intervals are opened on the shear wall to form a plurality of first openings;

[0011] Step 4: a second hole is formed in each of the several bored piles in the new connecting opening area, and the second hole is communicated with the first hole;

[0012] Step 5: a support beam structure is erected in the foundation pit of the adjacent basement, and a back-up structure is arranged at the bottom of the support beam structure;

[0013] Step 6: the row piles and shear walls in the new connecting opening area are removed to form a new connecting opening connecting the adjacent basements;

[0014] Step 7: the lintel and the side column of the new connecting opening are poured;

[0015] Step 8: after the lintel and the side column of the new connecting opening reach the design strength, the support beam structure and the back-up structure are removed;

[0016] Step 9: the new connecting opening is poured and formed.

[0017] In the step 1, the bored piles above the basement roof elevation in the row pile removal area are removed, and the old corbel beams at the top of the bored piles are also removed.

[0018] In the step 1, the width of the row pile removal area is greater than the width of the new connecting opening, and the two ends of the row pile removal area are respectively located outside the two ends of the new connecting opening.

[0019] In the step 2, when the row piles are removed, the main reinforcement in the bored piles is retained, so that the main reinforcement of the bored piles is anchored into the new corbel beam, and the bored piles and the new corbel beam are connected into an integral structure.

[0020] In the step 2, the length of the new corbel beam is greater than the width of the new connecting opening, and the two ends of the new corbel beam extend to the upper sides of the new connecting opening.

[0021] In the step 3, the several first holes are one-to-one corresponding to the several bored piles in the new connecting opening area, and the first holes are located at the top of the new connecting opening.

[0022] In the step 5, the support beam structure includes a main beam and a secondary beam, the two ends of the main beam are erected on the basement structure main beam, the secondary beam is vertically erected on the main beam, and the back-up structure is supported between the bottom of the main beam and the floor below.

[0023] The foundation pit of the adjacent basement is provided with a plurality of main beams, and the plurality of main beams are arranged in a direction perpendicular to the shear wall; a plurality of secondary beams are arranged in a width direction of the new connecting opening.

[0024] Each of the main beams is arranged in the width direction of the new connecting opening, and the two ends of the main beam extend to the upper sides of the new connecting opening and are erected on the basement structure main beam.

[0025] The several secondary beams are penetrated through the new communication opening through the several first openings and the second openings, and a pad plate is arranged between each secondary beam and the cast-in-place pile.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1. The present application can reinforce the cast-in-place pile above the new communication opening, ensure that the upper cast-in-place pile does not fall due to its own weight during the subsequent construction process of removing the closed shear wall and the cast-in-place pile and pouring the new communication opening, effectively improve the construction safety, and reduce the construction difficulty.

[0028] 2. The present application sets up the support beam structure and the backstop structure, uses the basement structure girder to set up the main girder, sets up the secondary beam through the pad plate through the first opening and the second opening and on the main girder, and sets up the backstop structure below the main girder, so that the structure pressure above the new communication opening is transmitted to the basement structure main girder and the lower floor, the structure above the communication opening is prevented from sinking or losing stability, the construction feasibility and safety of removing the closed shear wall and the cast-in-place pile of the new communication opening are ensured, and the construction quality and efficiency are ensured.

[0029] 3. The present application has simple construction procedures, is easy to construct, reduces the construction cost and difficulty, shortens the construction period, ensures the construction quality and efficiency while ensuring safe construction, and is suitable for the communication construction of adjacent basements separated by cast-in-place piles under the closed shear wall working condition. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a plane schematic view of the method for opening the communication opening of the adjacent basements separated by the closed shear wall and the cast-in-place pile (original design communication opening position change);

[0031] Figure 2 is a plane schematic view of the method for opening the communication opening of the adjacent basements separated by the closed shear wall and the cast-in-place pile (new communication opening);

[0032] Figure 3 is a construction side view of steps 1-2 in the method for opening the communication opening of the adjacent basements separated by the closed shear wall and the cast-in-place pile;

[0033] Figure 4 is a construction elevation view of step 3 in the method for opening the communication opening of the adjacent basements separated by the closed shear wall and the cast-in-place pile;

[0034] Figure 5 is a construction elevation view of step 4 in the method for opening the communication opening of the adjacent basements separated by the closed shear wall and the cast-in-place pile;

[0035] Figure 6is the support beam structure construction plan view of step 5 in the method for opening the adjacent basement communication port of the closed shear wall and cast-in-place pile division of the application;

[0036] Figure 7 is the back top structure construction plan view of step 5 in the method for opening the adjacent basement communication port of the closed shear wall and cast-in-place pile division of the application;

[0037] Figure 8 is the construction elevation view of step 5 in the method for opening the adjacent basement communication port of the closed shear wall and cast-in-place pile division of the application;

[0038] Figure 9 is the construction elevation view of step 6 in the method for opening the adjacent basement communication port of the closed shear wall and cast-in-place pile division of the application;

[0039] Figure 10 is the construction elevation view of step 7 in the method for opening the adjacent basement communication port of the closed shear wall and cast-in-place pile division of the application.

[0040] In the figure, 1 is a cast-in-place pile, 101 is a main reinforcement, 2 is an old crown beam, 3 is a basement roof, 4 is a new crown beam, 50 is an original design communication port, 5 is a new communication port, 51 is a lintel, 52 is a boundary column, 6 is a shear wall, 7 is a first hole, 8 is a second hole, 9 is a basement structure main beam, 10 is a main beam, 11 is a secondary beam, 12 is a back top structure, and 13 is a backing plate. DETAILED DESCRIPTION

[0041] The application will be further described below in combination with the drawings and specific embodiments.

[0042] In a certain building construction project, two adjacent basements are separated by cast-in-place piles 1, and shear walls 6 are constructed on both sides of the piles.

[0043] Please refer to the attached Figure 1 Considering the need for communication between the two basements, the original design communication port 50 is reserved on both sides of the shear wall 6. After the completion of the underground structure construction, the piles at the original design communication port 50 are removed. However, when the position of the communication port changes, the new communication port 5 extends to the closed shear wall 6, and the new communication port 5 needs to remove the shear wall 6 and part of the cast-in-place piles 1 inside.

[0044] For the cast-in-place piles 1 that coincide with the original design communication port 50, the conventional construction process can be used for removal. For the part of the new communication port 5 that extends to the closed shear wall 6, the method for opening the adjacent basement communication port of the closed shear wall and cast-in-place pile division is used.

[0045] Please refer to the attached Figure 2, two side shear walls 6 are closed, and two basements are completely isolated. After the underground structure is completed, when the two basements need to be connected, that is, a new connecting hole 5 needs to be added, the new connecting hole 5 needs to remove the shear wall 6 and part of the cast-in-place pile 1 in the corresponding area, and the method for opening the connecting hole of the adjacent basement divided by the closed shear wall and the cast-in-place pile is constructed.

[0046] A method for opening a connecting hole of adjacent basements divided by a closed shear wall and a cast-in-place pile, comprising the following steps:

[0047] Please refer to the accompanying drawings Figure 3 Step 1: Determine the pile removal area according to the position of the new connecting hole 5, and remove the upper part of the cast-in-place pile 1 in the pile removal area.

[0048] Preferably, the cast-in-place pile 1 above the basement roof 3 in the pile removal area is removed, and the old crown beam 2 at the top of the cast-in-place pile 1 is also removed, which can reduce the weight of the cast-in-place pile 1 and prevent the upper cast-in-place pile 1 from falling due to its own weight during subsequent construction.

[0049] The width of the pile removal area is greater than the width of the new connecting hole 5, and the two ends of the pile removal area are respectively located outside the two ends of the new connecting hole 5, so as to ensure that the pile removal area completely covers the construction area of the new connecting hole 5.

[0050] Please refer to the accompanying drawings Figure 3 Step 2: Construct a new crown beam 4 in the pile removal area, so that the new crown beam 4 is connected to the top of the removed pile.

[0051] Preferably, in step 2, when the pile is removed, the main reinforcement 101 in the cast-in-place pile 1 is retained, so that the main reinforcement 101 of the cast-in-place pile 1 is anchored into the new crown beam 4, and the cast-in-place pile 1 and the new crown beam 4 are connected into an integral structure, further preventing the cast-in-place pile 1 from falling due to its own weight.

[0052] Preferably, the length of the new crown beam 4 is greater than the width of the new connecting hole 5, and the two ends of the new crown beam 4 extend to the upper two sides of the new connecting hole 5, so as to ensure the reinforcing effect of the new crown beam 4 on the cast-in-place pile 1 above the new connecting hole 5.

[0053] Please refer to the accompanying drawings Figure 4 Step 3: A plurality of first holes 7 are formed on the shear wall 6, the plurality of first holes 7 are one-to-one corresponding to the plurality of cast-in-place piles 1 in the area of the new connecting hole 5, and the first holes 7 are located at the top of the new connecting hole 5.

[0054] Please refer to the accompanying drawings Figure 5 Step 4: A plurality of second holes 8 are formed on the plurality of cast-in-place piles 1 in the area of the new connecting hole 5, and the second holes 8 are connected to the first holes 7.

[0055] Please refer to the attached drawings Figure 6 to the attached drawings Figure 8 , step 5: erecting a support beam structure in the foundation pit of the adjacent basement, and setting a back-up structure 12 at the bottom of the support beam structure.

[0056] Please refer to the attached drawings Figure 6 to the attached drawings Figure 8 , the support beam structure comprises a main beam 10 and a secondary beam 11, the two ends of the main beam 10 are erected on the basement structure main beam 9, and the secondary beam 11 is erected vertically on the main beam 10, and the back-up structure 12 is supported between the bottom of the main beam 10 and the floor below.

[0057] Please refer to the attached drawings Figure 6 , a plurality of main beams 10 are arranged in the foundation pit of the adjacent basement, and the plurality of main beams 10 are arranged in the direction perpendicular to the shear wall 6; a plurality of secondary beams 11 are arranged in the width direction of the new connecting opening 5.

[0058] Please refer to the attached drawings Figure 6 , each of the main beams 10 is arranged in the width direction of the new connecting opening 5, and the two ends of the main beam 10 extend to the two sides above the new connecting opening 5 and are erected on the basement structure main beam 9.

[0059] The plurality of secondary beams 11 respectively pass through the new connecting opening 5 through a plurality of first openings 7 and second openings 8, and a pad 13 is arranged between each secondary beam 11 and the cast-in-place pile 1.

[0060] The pad 13 can be made of steel plate, and the pad 13 is laid on the top surface of the first opening 7 and the second opening 8, used to increase the contact area between the cast-in-place pile 1 and the secondary beam 11, so as to ensure the stability of the secondary beam 11 and provide effective support for the cast-in-place pile 1 above the new connecting opening 5, and the load is transmitted to the secondary beam 11, and then to the main beam 10, the basement structure main beam 9, the back-up structure and the floor below, so as to ensure the safety of the construction of the new connecting opening 5.

[0061] Preferably, the main beam 10, the secondary beam 11 and the back-up structure 12 can all be made of I-beam, which has high structural strength and strong bearing capacity. The number and length of the main beam 10, the secondary beam 11 and the back-up structure 12 can be adjusted according to actual support requirements, which can effectively prevent the falling of the upper row piles, so as to ensure the safety of the opening construction. The erection of the main beam 10, the secondary beam 11 and the back-up structure 12 can be carried out by using the existing process, which will not be described here. When disassembling, the reverse disassembly according to the erection steps can be carried out.

[0062] Please refer to the attached drawings Figure 9 , step 6: removing the row piles and the shear wall 6 in the area of the new connecting opening 5 to form the new connecting opening 5 connecting the adjacent basements.

[0063] Please refer to the attached drawings Figure 10, step 7: pouring the lintel 51 and the side column 52 of the new connection opening 5.

[0064] The pouring of the lintel 51 and the side column 52 can be performed according to the existing process based on the construction drawing, which will not be described herein.

[0065] Step 8: after the lintel 51 and the side column 52 of the new connection opening 5 reach the design strength, the support beam structure and the back-up structure 12 are removed.

[0066] Step 9: the new connection opening 5 is formed by pouring the micro-expansion concrete. The pouring process of the new connection opening 5 is the same as the existing technology, which will not be described herein.

[0067] The above only describes the preferred embodiments of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for creating a connecting opening between adjacent basements separated by a closed shear wall and cast-in-place piles, characterized in that: Includes the following steps: Step 1: Determine the pile removal area based on the location of the new connection (5), and remove the upper part of the cast-in-place piles (1) within the pile removal area; Step 2: Construct the new crown beam (4) within the area where the piles are removed, so that the new crown beam (4) is connected to the top of the removed piles; In step 2, when removing the piles, the main reinforcement (101) inside the cast-in-place pile (1) is retained, so that the main reinforcement (101) of the cast-in-place pile (1) is anchored into the new crown beam (4), and the cast-in-place pile (1) and the new crown beam (4) are connected into an integral structure. Step 3: Make several first openings (7) at intervals on the shear wall (6); In step 3, several first openings (7) correspond one-to-one with several cast-in-place piles (1) in the area of ​​the new connecting opening (5), and the first openings (7) are located at the top of the new connecting opening (5); Step 4: Open a second opening (8) on several cast-in-place piles (1) in the area of ​​the new connection (5), and the second opening (8) is connected to the first opening (7); Step 5: Erect a support beam structure in the foundation pit of the adjacent basement, and set a back-top structure (12) at the bottom of the support beam structure. Step 6: Remove the piles and shear walls (6) in the area of ​​the new connection (5) to form a new connection (5) connecting the adjacent basement. Step 7: Cast the lintel (51) and side column (52) of the new connecting opening (5); Step 8: After the lintel (51) and side column (52) of the new connecting opening (5) reach the design strength, remove the supporting beam structure and the back-top structure (12). Step 9: Cast the new connecting port (5) into shape.

2. The method for opening a connecting opening between adjacent basements separated by a closed shear wall and cast-in-place piles according to claim 1, characterized in that: In step 1, the cast-in-place piles (1) above the elevation of the basement roof slab (3) in the pile removal area are removed, and the old crown beam (2) on top of the cast-in-place piles (1) is also removed.

3. The method for opening a connecting opening between adjacent basements separated by a closed shear wall and cast-in-place piles according to claim 1, characterized in that: In step 1, the width of the pile removal area is greater than the width of the new connection (5), and the two ends of the pile removal area are located on the outer sides of the two ends of the new connection (5).

4. The method for opening a connecting opening between adjacent basements separated by a closed shear wall and cast-in-place piles according to claim 1, characterized in that: In step 2, the length of the new crown beam (4) is greater than the width of the new connecting port (5), and the two ends of the new crown beam (4) extend to the upper sides of the new connecting port (5).

5. The method for opening a connecting opening between adjacent basements separated by a closed shear wall and cast-in-place piles according to claim 1, characterized in that: In step 5, the supporting beam structure includes a main beam (10) and a secondary beam (11). The two ends of the main beam (10) are erected on the main beam (9) of the basement structure, and the secondary beam (11) is erected vertically on the main beam (10). The backrest structure (12) is supported between the bottom of the main beam (10) and the floor slab below.

6. The method for opening a connecting opening between adjacent basements separated by a closed shear wall and cast-in-place piles according to claim 5, characterized in that: The foundation pits of the adjacent basements are equipped with multiple main beams (10), which are arranged at intervals along the direction perpendicular to the shear wall (6); and several secondary beams (11) are arranged at intervals along the width direction of the new connection (5).

7. The method for opening a connecting opening between adjacent basements separated by a closed shear wall and cast-in-place piles according to claim 5 or 6, characterized in that: Each of the main beams (10) is set along the width direction of the new connection (5), and both ends of the main beams (10) extend to the upper sides of the new connection (5) and are erected on the main beams (9) of the basement structure.

8. The method for opening a connecting opening between adjacent basements separated by a closed shear wall and cast-in-place piles according to claim 6, characterized in that: The aforementioned secondary beams (11) pass through the new connecting opening (5) through several first openings (7) and second openings (8), and each secondary beam (11) is provided with a pad (13) between it and the cast-in-place pile (1).

Images