Method for removing and replacing bracing during construction of a basement

Abstract

The present application relates to the technical field of basement, disclose a basement construction process inner support removal and support replacement construction method, including the following construction steps: 1), construction bottom structure;2), construction outer wall while, construction conversion beam, conversion beam and outer wall integrated construction forming;3), construction multiple support replacement beam, support replacement beam butt joint between conversion beam and support pile;Construction multiple temporary support beam, the outer end of temporary support beam butt joint on conversion beam;4), remove inner support;5), construction basement, the inner end of temporary support beam butt joint on basement, and with longitudinal beam horizontal alignment arrangement;Conversion beam is set on outer wall, conversion beam is combined with outer wall as a whole, support replacement beam and conversion beam butt joint, the basement is butt joint with conversion beam through temporary support beam, forms complete support replacement structure system, conversion beam can withstand the asymmetric shear force generated by support replacement beam and temporary support beam, does not affect the normal construction and use of outer wall.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of basement, in particular to a method for removing inner support and replacing support during basement construction. BACKGROUND

[0002] In deep foundation pit support engineering, due to the limitation of the surrounding environment, the inner support structure is more and more common. If the inner support structure is used, the inner support structure needs to be removed during the basement construction stage to avoid affecting the construction of the basement upwards.

[0003] Before the inner support structure is removed, a replacement beam needs to be arranged between the outer wall of the basement and the support pile to form a new support node. After the inner support structure is removed, the earth pressure outside the support pile is transmitted to the beam slab structure of the basement through the replacement beam.

[0004] When there is a driveway or a larger reserved hole near the outer wall, the beam slab structure cannot bear the internal force of the replacement beam, so a temporary support beam needs to be arranged at the hole to transmit the internal force of the replacement beam to the adjacent beam slab structure.

[0005] In the prior art, if the temporary support beam is arranged horizontally aligned with the replacement beam, the temporary support beam will act on the structural floor, and the structural floor is relatively thin and has weak bearing capacity, which can easily damage the structural floor. If the temporary support beam is arranged horizontally aligned with the structural beam, the temporary support beam and the replacement beam cannot form point-to-point force, and the outer wall will bear asymmetric shearing forces on both sides, which can easily damage the outer wall and even destroy the waterproof structure of the outer wall, which is not conducive to the normal use of the outer wall. SUMMARY

[0006] The purpose of the present application is to provide a method for removing inner support and replacing support during basement construction, which aims to solve the problem of asymmetric shearing forces on the outer wall caused by the replacement beam and the temporary support beam in the prior art, which can easily damage the outer wall.

[0007] The present application is implemented as follows: a method for removing inner support and replacing support during basement construction, comprising the following construction steps:

[0008] 1) constructing the bottom structure of the basement at the bottom of the foundation pit, wherein the foundation pit has an inner support;

[0009] 2) constructing the outer wall of the basement while constructing the conversion beam, wherein the conversion beam is integrally constructed and formed with the outer wall, and the conversion beam is arranged along the circumference of the outer wall; the outer wall and the support pile have a wall-out space, and the outer wall encloses a wall-in space;

[0010] 3) constructing a plurality of support-changing beams in the space outside the wall, the plurality of support-changing beams being arranged along the circumference of the outer wall, the support-changing beams being abutted between the transfer beam and the support pile and being arranged in horizontal alignment between the support-changing beams and the support pile; the inner end of the support-changing beam being abutted on the transfer beam, and the outer end of the support-changing beam being abutted on the support pile;

[0011] constructing a plurality of temporary support beams in the space inside the wall, the plurality of temporary support beams being arranged along the circumference of the outer wall, the outer end of the temporary support beam being abutted on the transfer beam;

[0012] 4) removing the inner support in the foundation pit;

[0013] 5) constructing a basement in the space inside the wall, the basement comprising a plurality of structural beams and a structural floor; the plurality of structural beams comprising a plurality of longitudinal beams arranged in the structural floor, the inner end of the temporary support beam being abutted on the basement and being arranged in horizontal alignment with the longitudinal beam.

[0014] Further, in the construction step 1), the bottom structure of the basement comprises a pile foundation and a bottom plate of the basement.

[0015] Further, in the construction step 4), after the construction of the basement is completed, the backfilling of the foundation pit is performed.

[0016] Further, in the construction step 2), the transfer beam is a concrete structure, and the transfer beam is integrally formed with the outer wall by synchronous formwork construction, thereby forming an integrated structure with the outer wall.

[0017] Further, in the construction step 2), the inner side of the transfer beam is embedded in the outer wall, thereby forming an integrated structure with the outer wall.

[0018] The inner side of the transfer beam has an inner extension part located in the outer wall, and the outer side of the transfer beam extends to the space outside the wall to form an outer extension part, and the inner end of the support-changing beam is abutted on the outer extension part.

[0019] Further, in the construction step 5), the structural floor has a support side facing the outer wall, the structural beam has a transverse beam arranged on the support side, the end of the plurality of longitudinal beams is abutted on the transverse beam, and the inner end of the temporary support beam is abutted on the transverse beam.

[0020] Further, the support-changing beam and the temporary support beam are respectively steel structures.

[0021] Further, the support-changing beam and the temporary support beam are respectively concrete structures.

[0022] Further, in the construction step 2), the outer wall is provided with a wall reinforcing frame having a reinforcing space; the wall reinforcing frame has an inner reinforcing frame arranged in the inner extension part;

[0023] The inner reinforcing frame extends outwardly and has an outer reinforcing frame extending into the outer extension part; the outer reinforcing frame comprises a plurality of horizontally arranged horizontal reinforcing bars and a plurality of vertically arranged stirrup rings; the horizontal reinforcing bars are arranged along the outer periphery of the outer extension part and extend outwardly along the outer extension part; the horizontal reinforcing bars are vertically arranged along the outward extension direction of the outer extension part;

[0024] The stirrup rings are arranged along the outward extension direction of the outer extension part and surround the outer periphery of the horizontal reinforcing bars; the stirrup rings are fixedly connected to the horizontal reinforcing bars, respectively;

[0025] The horizontal reinforcing bars form an enclosed area in the middle of the outer extension part; a central reinforcing bar is arranged in the enclosed area; the inner end of the central reinforcing bar extends into the inner extension part; the outer end of the central reinforcing bar extends into the support beam;

[0026] The outer periphery of the central reinforcing bar is provided with a plurality of inclined bars; the inner end of the inclined bars is fixedly connected to the central reinforcing bar; the outer end of the inclined bars is fixedly connected to the inner reinforcing frame and the outer reinforcing frame, respectively; the inclined bars are arranged along the circumferential direction of the central reinforcing bar and along the axial direction of the central reinforcing bar; the inclination angles between adjacent inclined bars are different.

[0027] Further, in the construction step 3), the support pile has an arc-shaped abutting surface facing the support beam; the arc-shaped abutting surface is arranged in an arc shape in the horizontal direction; a plurality of horizontally arranged transverse grooves are arranged on the arc-shaped abutting surface; the transverse grooves are arranged along the height direction of the support pile and are arranged along the transverse curvature of the support pile;

[0028] The support beam is a concrete structure; the support beam is provided with a support reinforcing frame; the outer end of the central reinforcing bar extends into the support reinforcing frame and is fixedly connected to the support reinforcing frame; the inner end of the support reinforcing frame is connected to the outer extension part;

[0029] The support beam has an end surface connected to the arc-shaped abutting surface; the end surface is arc-shaped; the support reinforcing frame has a plurality of arc-shaped bars; the arc-shaped bars are arranged along the arc-shaped end surface; the arc-shaped bars are embedded in the transverse grooves; the end surface is fixedly connected to the arc-shaped abutting surface;

[0030] The support piles are spaced apart from each other; the end of the support beam is expanded outwardly to form an embedding part; the embedding part is embedded in the space between the support piles.

[0031] Compared with the prior art, the basement construction process internal support removal support replacement construction method provided by the basement construction process internal support removal support replacement construction method provided by the application sets a conversion beam on the outer wall, the conversion beam is integrated with the outer wall, the support replacement beam is connected with the conversion beam, the basement is connected with the conversion beam through the temporary support beam, and a complete support replacement structure system is formed; the support replacement beam is horizontally aligned with the support pile, the temporary support beam is horizontally aligned with the longitudinal beam of the basement, the conversion beam can bear the asymmetric shear force generated by the support replacement beam and the temporary support beam, and does not affect the normal construction and use of the outer wall.

[0032] The support replacement structure system not only effectively solves the problem that there is a large hole in the area near the outer wall when the internal support is removed and replaced, but also effectively protects the outer wall, avoids the damage or injury of the unbalanced shear force on the structure of the outer wall and the waterproof of the outer wall, and affects the normal use. Compared with the traditional support replacement structure, the support replacement structure system not only greatly saves the cost, has good environmental protection and energy saving effect, has high resource utilization rate, and the structure process is simple, convenient to construct, and easy to popularize and use. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a top view schematic diagram of the support replacement structure system provided by the application;

[0034] Figure 2 is a front view schematic diagram of the support replacement structure system provided by the application;

[0035] Figure 3 is a front view schematic diagram of the center steel bar, the horizontal steel bar and the hoop ring cooperation provided by the application;

[0036] Figure 4 is a cross-sectional view schematic diagram of the support replacement beam and the support pile cooperation provided by the application. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application, and are not used to limit the application.

[0038] The implementation of the application is described in detail below in combination with specific examples.

[0039] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0040] Referring to Figures 1-4 , the preferred embodiment provided by the present application is shown.

[0041] The underground construction process internal support removal and support replacement construction method comprises the following construction steps:

[0042] 1) Constructing the bottom structure of the basement at the bottom of the foundation pit, and the foundation pit has internal supports;

[0043] 2) While constructing the outer wall 500 of the basement, the transfer beam 400 is constructed, the transfer beam 400 is integrally constructed and formed with the outer wall 500, and the transfer beam 400 is arranged around the circumference of the outer wall 500; the outer wall 500 and the support pile 100 have a wall-out space, and the outer wall 500 encloses to form a wall-in space;

[0044] 3) A plurality of support replacement beams 102 are constructed in the wall-out space, the plurality of support replacement beams 102 are arranged at intervals along the circumference of the outer wall 500, the support replacement beams 102 are butt-jointed between the transfer beam 400 and the support pile 100, and the support replacement beams 102 and the support pile 100 are arranged in horizontal alignment; the inner end of the support replacement beam 102 is butt-jointed on the transfer beam 400, and the outer end of the support replacement beam 102 is butt-jointed on the support pile 100;

[0045] A plurality of temporary support beams 200 are constructed in the wall-in space, the plurality of temporary support beams 200 are arranged at intervals along the circumference of the outer wall 500, and the outer end of the temporary support beam 200 is butt-jointed on the transfer beam 400;

[0046] 4) The internal supports in the foundation pit are removed;

[0047] 5) The basement is constructed in the wall-in space, the basement comprises a plurality of structural beams and a structural floor 303; the plurality of structural beams comprise a plurality of longitudinal beams 301 arranged in the structural floor 303, the inner end of the temporary support beam 200 is butt-jointed on the basement, and is arranged in horizontal alignment with the longitudinal beam 301.

[0048] The underground construction process internal support removal and support replacement construction method provided above has the following beneficial technical effects:

[0049] 1), the conversion beam 400 is arranged in the outer wall 500, and the conversion beam 400 and the outer wall 500 form an integral structure, which not only can effectively disperse and transmit the internal force borne by the support beam 102 to the temporary support beam 200, but also can improve the shear capacity of the outer wall 500, protect the outer wall 500, and avoid damage to the outer wall 500 caused by stress distribution when the inner support is removed;

[0050] 2), the temporary support beam 200 can be arranged according to the drawing of the basement, so as to avoid horizontal alignment with the support beam 102 and avoid affecting the construction of the basement and the damage to the structural floor 303.

[0051] 3), the conversion beam 400 is supported and poured together with the outer wall 500, so as to ensure the integrity of the outer wall 500 structure, the quality is controllable, and the safety is reliable;

[0052] 4), the asymmetric shear force formed by the conversion beam 400 supporting the support beam 102 and the temporary support beam 200;

[0053] 5), the construction method is relatively simple, convenient for construction, and easy to popularize and use.

[0054] The above-mentioned basement construction process inner support removal support construction method sets the conversion beam 400 on the outer wall 500, the conversion beam 400 is combined with the outer wall 500 as a whole, the support beam 102 is connected with the conversion beam 400, the basement is connected with the conversion beam 400 through the temporary support beam 200, and a complete support structure system is formed; the support beam 102 is horizontally aligned with the support pile 100, the temporary support beam 200 is horizontally aligned and arranged with the longitudinal beam 301 of the basement, the conversion beam 400 can bear the asymmetric shear force generated by the support beam 102 and the temporary support beam 200, and does not affect the normal construction and use of the outer wall 500.

[0055] The support structure system not only effectively solves the problem of large hole in the area near the outer wall 500 during the inner support removal and support, but also effectively protects the outer wall 500, avoids damage to the structure and waterproof of the outer wall 500 caused by the unbalanced shear force on both sides, and affects the normal use. Compared with the traditional support structure, the support structure system not only greatly saves the cost, has good environmental protection and energy saving effect, has high resource utilization rate, and the structure process is simple, convenient for construction, and easy to popularize and use.

[0056] The temporary support beam 200 is horizontally arranged between the longitudinal beam 301, so that the change support beam 102 and the temporary support beam 200 are arranged in a staggered manner in the horizontal direction, and the asymmetric shear force generated between the two acts on the transfer beam 400 and does not directly act on the outer wall 500, avoiding damage to the outer wall 500, and the temporary support beam 200 is arranged in alignment with the longitudinal beam 301 of the basement, and the basement, the temporary support beam 200, the transfer beam 400, the change support beam 102 and the support pile 100 form an overall change support structure system.

[0057] In the construction step 1), the bottom structure of the basement includes the pile foundation and the bottom plate of the basement.

[0058] In the construction step 4), when the construction of the basement is completed, the backfilling of the foundation pit is carried out.

[0059] In the construction step 2), the transfer beam 400 is a concrete structure, and the transfer beam 400 and the outer wall 500 are synchronously and integrally supported and molded to form an integrated structure, and the transfer beam 400 is molded and poured together with the outer wall 500, so as to ensure the structural integrity of the outer wall 500, the quality is controllable, and the safety is reliable.

[0060] In the construction step 2) of the embodiment, the inner side of the transfer beam 400 is embedded in the outer wall 500 to form an integrated structure with the outer wall 500; the inner side of the transfer beam 400 has an inner extension part located in the outer wall 500, and the outer side of the transfer beam 400 extends to the space outside the wall to form an outer extension part 402, and the inner end of the change support beam 102 is connected to the outer extension part 402, so as to facilitate the connection between the change support beam 102 and the transfer beam 400.

[0061] In the construction step 5), the structural floor 303 has a support side facing the outer wall 500, the structural beam has a transverse beam 302 arranged on the support side, the end of the plurality of longitudinal beams 301 is connected to the transverse beam 302, and the inner end of the temporary support beam 200 is connected to the transverse beam 302, so as to facilitate the connection between the temporary support beam 200 and the basement.

[0062] The change support beam 102 and the temporary support beam 200 are respectively steel structures, or the change support beam 102 and the temporary support beam 200 are respectively concrete structures, which can be determined according to actual construction needs.

[0063] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement 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 of construction of a basement construction process within the support demolition support construction method, characterized in that, The construction method comprises the following steps: 1) constructing a bottom structure of a basement at the bottom of a foundation pit, the foundation pit having inner supports; 2) constructing an outer wall of the basement while constructing a transfer beam, the transfer beam being integrally formed with the outer wall, the transfer beam being arranged along the circumference of the outer wall; the outer wall and the support pile have a wall-out space therebetween, the outer wall enclosing a wall-in space; 3) constructing a plurality of support-changing beams in the wall-out space, the support-changing beams being arranged along the circumference of the outer wall at intervals, the support-changing beams being abutted between the transfer beam and the support pile and being arranged in horizontal alignment therebetween; the inner ends of the support-changing beams being abutted on the transfer beam, the outer ends of the support-changing beams being abutted on the support pile; a plurality of temporary support beams are constructed in the wall-in space, the temporary support beams being arranged along the circumference of the outer wall at intervals, the outer ends of the temporary support beams being abutted on the transfer beam; 4) removing the inner supports in the foundation pit; 5) constructing the basement in the wall-in space, the basement comprising a plurality of structural beams and structural floors; the structural beams comprising a plurality of longitudinal beams arranged in the structural floors, the inner ends of the temporary support beams being abutted on the basement and being arranged in horizontal alignment with the longitudinal beams; in the step 2) of construction, the outer wall is provided with a wall steel bar frame, the wall steel bar frame having a steel bar space; the wall steel bar frame has an inner steel bar frame arranged in an inner extension portion; the inner steel bar frame extends outwardly, having an outer steel bar frame extending into an outer extension portion; the outer steel bar frame comprises a plurality of horizontally arranged horizontal steel bars and a plurality of vertically arranged stirrup rings, the horizontal steel bars being arranged along the circumference of the outer extension portion at intervals, the horizontal steel bars being arranged in vertical spirals along the outward extension direction of the outer extension portion; the stirrup rings are arranged at intervals along the outward extension direction of the outer extension portion, the stirrup rings being arranged around the circumference of the horizontal steel bars and being fixedly connected with the horizontal steel bars respectively; the horizontal steel bars enclose a surrounding area in the middle portion of the outer extension portion, the surrounding area having a centrally arranged central steel bar arranged horizontally, the inner end of the central steel bar extending into the inner extension portion, the outer end of the central steel bar extending into the support-changing beam; the central steel bar is provided with a plurality of inclined steel bars, the inner ends of the inclined steel bars being fixedly abutted on the central steel bar, the outer ends of the inclined steel bars being fixedly connected with the inner steel bar frame and the outer steel bar frame respectively; the inclined steel bars are arranged at intervals along the circumference of the central steel bar and are arranged at intervals along the axial direction of the central steel bar, the inclination angles between adjacent inclined steel bars being different; in the step 3) of construction, the support pile has an arc-shaped abutting surface facing the support-changing beam, the arc-shaped abutting surface being arranged in an arc shape in the horizontal direction; the arc-shaped abutting surface is engraved with a plurality of horizontally arranged transverse grooves, the transverse grooves being arranged at intervals along the height direction of the support pile, the transverse grooves being arranged along the transverse bending direction of the support pile; The support-changing beam is a concrete structure, a support-changing steel bar frame is arranged in the support-changing beam, the outer end of the central steel bar extends into the support-changing steel bar frame and is fixedly connected with the support-changing steel bar frame, and the inner end of the support-changing steel bar frame is butted on the outer extension part. The support-changing beam has an end face butted on the arc-shaped abutting face, the end face is arc-shaped, the support-changing steel bar frame has a plurality of arc-shaped steel bars, the arc-shaped steel bars are arc-bent along the end face, the arc-shaped steel bars are embeddedly fixed in the transverse grooves, and the end face is butted and fixed on the arc-shaped abutting face. The support-changing beam has an end face butted on the arc-shaped abutting face, the end face is arc-shaped, the support-changing steel bar frame has a plurality of arc-shaped steel bars, the arc-shaped steel bars are arc-bent along the end face, the arc-shaped steel bars are embeddedly fixed in the transverse grooves, and the end face is butted and fixed on the arc-shaped abutting face.

2. The method of bracing removal and replacement construction within a basement construction process of claim 1, wherein, The support-changing beam has an end face butted on the arc-shaped abutting face, the end face is arc-shaped, the support-changing steel bar frame has a plurality of arc-shaped steel bars, the arc-shaped steel bars are arc-bent along the end face, the arc-shaped steel bars are embeddedly fixed in the transverse grooves, and the end face is butted and fixed on the arc-shaped abutting face.

3. The method of bracing removal and replacement construction within a basement construction process of claim 1, wherein, The support-changing beam has an end face butted on the arc-shaped abutting face, the end face is arc-shaped, the support-changing steel bar frame has a plurality of arc-shaped steel bars, the arc-shaped steel bars are arc-bent along the end face, the arc-shaped steel bars are embeddedly fixed in the transverse grooves, and the end face is butted and fixed on the arc-shaped abutting face.

4. The method of bracing removal and replacement construction within a basement construction process of claim 1, wherein, The support-changing beam has an end face butted on the arc-shaped abutting face, the end face is arc-shaped, the support-changing steel bar frame has a plurality of arc-shaped steel bars, the arc-shaped steel bars are arc-bent along the end face, the arc-shaped steel bars are embeddedly fixed in the transverse grooves, and the end face is butted and fixed on the arc-shaped abutting face.

5. The method of bracing removal and replacement construction within a basement construction process of any one of claims 1 to 4, wherein, The support-changing beam has an end face butted on the arc-shaped abutting face, the end face is arc-shaped, the support-changing steel bar frame has a plurality of arc-shaped steel bars, the arc-shaped steel bars are arc-bent along the end face, the arc-shaped steel bars are embeddedly fixed in the transverse grooves, and the end face is butted and fixed on the arc-shaped abutting face. The support-changing beam has an end face butted on the arc-shaped abutting face, the end face is arc-shaped, the support-changing steel bar frame has a plurality of arc-shaped steel bars, the arc-shaped steel bars are arc-bent along the end face, the arc-shaped steel bars are embeddedly fixed in the transverse grooves, and the end face is butted and fixed on the arc-shaped abutting face.

6. The method of bracing removal and replacement construction within a basement construction process of any one of claims 1 to 4, wherein, ​ 7. The method of bracing removal and replacement construction within a basement construction process of any one of claims 1 to 4, wherein, ​ 8. The method of bracing removal and replacement construction within a basement construction process of any one of claims 1 to 4, wherein, ​

Images