CN114351761A - Construction method for pre-buried frame column at mid-partition of underground structure - Google Patents
Construction method for pre-buried frame column at mid-partition of underground structure Download PDFInfo
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- CN114351761A CN114351761A CN202210077799.9A CN202210077799A CN114351761A CN 114351761 A CN114351761 A CN 114351761A CN 202210077799 A CN202210077799 A CN 202210077799A CN 114351761 A CN114351761 A CN 114351761A
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Abstract
The invention discloses a construction method of a pre-buried frame column at an intermediate wall of an underground structure, which is characterized in that when the positions of the frame column of the underground structure and a shared ground connection wall of a partitioned foundation pit are completely overlapped, the shared ground connection wall and the frame column are simultaneously constructed on the premise of ensuring the structure safety, a reinforcement cage is formed together, concrete is poured, the condition that the frame column is constructed after the shared ground connection wall is dismantled is avoided, and on one hand, the time for constructing the frame column can be saved; on the other hand, the common diaphragm wall can be dismantled at multiple points simultaneously, so that the construction efficiency is improved, and the construction period is shortened. The invention solves the problems of long construction period and low construction efficiency caused by the fact that the underground diaphragm wall and the frame column are constructed in sequence and shared when the positions of the underground diaphragm wall and the frame column of the underground structure coincide.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of an embedded frame column at an intermediate wall of an underground structure.
Background
During construction of large-area deep foundation pits, construction can be carried out in a partitioned mode, and an intermediate wall (namely, a diaphragm wall of an underground structure of an original partition) at the junction of the underground structures of two adjacent partitions needs to be dismantled at the later stage. When the positions of the frame columns of the underground structure coincide with the position of the intermediate wall, the conventional construction method is to construct the intermediate wall first, and then to pour the frame columns after the intermediate wall is dismantled in the later period. If the underground structure is the multilayer, need top-down's successive layer after demolising the mid-board, the frame post of mid-board department is pour again integratively, leads to the construction period long, and the problem that the efficiency of construction is low.
Disclosure of Invention
In order to overcome the defects in the prior art, a construction method for pre-buried frame columns at an intermediate wall of an underground structure is provided so as to solve the problems that when the positions of an underground diaphragm wall and frame columns of the underground structure coincide, the construction period is long and the construction efficiency is low due to the fact that the underground diaphragm wall and the frame columns are constructed in sequence.
In order to achieve the above object, there is provided a method of constructing an embedded frame column at an intermediate wall of an underground structure, comprising the steps of:
dividing a foundation pit into a plurality of pit areas, respectively constructing a ground connection wall of each pit area, and installing a column steel bar structure of a frame column of a basement structure which is superposed with the position of the common ground connection wall in a wall steel bar structure of the common ground connection wall when constructing the common ground connection wall of two adjacent pit areas;
pouring concrete of the common diaphragm wall so that the concrete covers the wall steel bar structures and the column steel bar structures to be solidified to form the common diaphragm wall;
excavating a plurality of pit areas, constructing an underground structure, cutting the common underground diaphragm wall along the outer edge of the frame column before pouring a beam plate of the underground structure at the common underground diaphragm wall, reserving the frame column and breaking the rest common underground diaphragm wall;
and constructing the beam slab and connecting the beam slab to the frame column.
Further, when the column steel bar structure is installed, a connecting sleeve is installed in the column steel bar structure, when the beam slab is poured, concrete of the frame column is chiseled to expose the connecting sleeve, and steel bars of the beam slab are connected to the frame column through the connecting sleeve.
Furthermore, connecting sleeve's one end is connected with the anchor muscle, the anchor muscle connect in column steel bar structure's vertical main muscle, connecting sleeve's other end detachably inserts and is equipped with the shutoff piece connecting sleeve exposes the back, will the shutoff piece gets rid of, and will connecting sleeve's the other end connect in the beam slab reinforcing bar of beam slab.
Furthermore, when the common diaphragm wall is cut, chiseling layers are reserved on two sides of the frame column respectively, and when the beam slab is poured, the chiseling layers are chiseled to expose the connecting sleeve.
Further, when the common diaphragm wall is cut along the outer edge of the frame column, the common diaphragm wall is cut by static force to separate the frame column.
The construction method of the embedded frame column at the middle partition wall of the underground structure has the advantages that when the positions of the frame column of the underground structure and the shared ground connection wall of the partitioned foundation pit are completely overlapped, the shared ground connection wall and the frame column are constructed simultaneously on the premise of ensuring the safety of the structure, a reinforcement cage is formed together, concrete is poured, the condition that the frame column is constructed after the shared ground connection wall is removed is avoided, and on one hand, the time for constructing the frame column can be saved; on the other hand, the common diaphragm wall can be dismantled at multiple points simultaneously, so that the construction efficiency is improved, and the construction period is shortened.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 to 5 are schematic views illustrating steps of a method for constructing embedded frame columns at an intermediate wall of an underground structure according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 5, the present invention provides a method for constructing pre-buried frame columns at an intermediate wall of an underground structure, including the steps of:
s1: dividing a foundation pit into a plurality of pit areas, constructing a ground connection wall of each pit area respectively, and installing a column steel bar structure 21 of a frame column 2 of a basement structure, which is superposed with the position of the common ground connection wall 1, in a wall steel bar structure 11 of the common ground connection wall 1 when constructing the common ground connection wall 1 of two adjacent pit areas.
When the area of the foundation pit is large, the foundation pit is divided into a plurality of pit areas so as to be convenient for construction of the diaphragm wall.
And after the foundation pit is partitioned, positioning the frame columns overlapped or superposed with the common underground diaphragm wall according to the design drawing of the underground structure. And numbering the underground continuous walls in blocks according to a construction drawing, completely planning the frame columns into the underground continuous wall units, and numbering the frame columns according to the underground continuous wall units in sequence. The frame columns are set out and positioned at the job site and left permanently marked.
And (3) manufacturing a reinforcement cage (column reinforcement structure) for manufacturing the frame column. The column steel bar structure of the frame column and the wall steel bar structure of the underground continuous wall are constructed simultaneously to form an integrated steel reinforcement cage.
When the integrated reinforcement cage is manufactured, the size of a column reinforcement structure, the position of a reinforcement of a frame column, the position of a reinforcement of a ground connecting wall, the position of a connecting reinforcement of a basement floor slab and the position of a pre-buried connecting sleeve are marked on a reinforcement manufacturing platform. And then placing and welding according to the marked position.
The wall steel bar structure is constructed according to the requirements of the steel bars of the underground diaphragm wall, the ground wall reinforcement in the frame column area is unchanged, and the steel bars are selected to be large when the frame column steel bars conflict with the ground wall steel bars.
In this embodiment, one end of the connecting sleeve 22 is connected with an anchoring rib 23, the anchoring rib 23 is connected to the vertical main rib of the column steel bar structure 21, the other end of the connecting sleeve 22 is detachably inserted with a plugging piece, after the connecting sleeve 22 is exposed, the plugging piece is removed, and the other end of the connecting sleeve 22 is connected to the beam slab steel bar 31 of the beam slab 3.
To frame post and basement floor (roof beam) junction, reserve the connecting sleeve in the post steel bar structure, the anchor reinforcing bar is connected to one side of connecting sleeve, carries out interim shutoff through the shutoff piece to the opposite side of connecting sleeve. When the floor slab (beam) at the position is to be constructed, the connecting sleeve is effectively connected with the floor slab (beam).
And after the integral reinforcement cage is manufactured, calculating the gravity center and the lifting point of the reinforcement cage again.
S2: and pouring concrete of the common diaphragm wall 1, so that the concrete is coated on the wall reinforced structure 11 and the column reinforced structure 21 to be solidified to form the common diaphragm wall 1.
After the integral reinforcement cage is hoisted in place by the crawler crane, the concrete of the common ground connecting wall is poured.
S3: and excavating a plurality of pit areas, constructing an underground structure, cutting the common underground diaphragm wall 1 along the outer edge of the frame column 2 before pouring the beam slab 3 of the underground structure at the position of the common underground diaphragm wall 1, reserving the frame column 2 and breaking the rest common underground diaphragm wall 1.
When cutting the common diaphragm wall 1, a chiseling layer is reserved on each of the two sides of the frame column 2. When the common diaphragm wall 1 is cut along the outer edge of the frame post 2, the common diaphragm wall 1 is cut using static force to separate the frame post 2. When the beam panel 3 is cast, the chiseled layer is chiseled to expose the other end of the connecting sleeve 22.
Specifically, the step of statically cutting the common diaphragm wall to separate the frame columns includes:
A. and according to the construction drawing field lofting, determining the position of the cut frame column, the cutting line and the position of the cut section. 10cm of each side of the frame column is reserved as a chiseling layer (as shown in fig. 3 and 4) so as to prevent the cutting from damaging the column reinforcement structure of the frame.
B. And drilling a rope penetrating hole by adopting a diamond water drill according to the cutting line.
C. And installing and fixing the guide wheel and the wire saw equipment.
D. According to the determined cutting section, the diamond rope is wound on the driving wheel and the auxiliary wheel in sequence and penetrates into the rope threading hole.
E. Adjusting the lifting tension of the driving wheel to ensure that the diamond rope is properly tightened, supplying cooling water, and then starting the driving wheel to drive the diamond rope to rotate and cut.
F. The above operations are repeated to cut and separate the frame columns in order.
G. And after the frame column is separated, breaking the rest shared underground diaphragm wall separated from the frame column by using a pickaxe.
H. And removing a chiseled layer (namely redundant reinforced concrete) from the frame column after cutting and separating in a manual chiseling mode.
The cutting sequence is from top to bottom, from left to right, and the cutting and the separation are gradually carried out according to the frame column number.
S4: the beam slab 3 is constructed, and the beam slab 3 is connected to the frame column 2.
According to the construction method of the pre-buried frame column at the intermediate wall of the underground structure, when the frame column of the underground structure is completely overlapped with the common underground diaphragm wall of the partitioned foundation pit, the common underground diaphragm wall and the frame column are constructed simultaneously on the premise of ensuring the structure safety, a reinforcement cage is formed together, concrete is poured, the condition that the frame column is constructed after the common underground diaphragm wall is dismantled is avoided, and on one hand, the time for constructing the frame column can be saved; on the other hand, the common diaphragm wall can be dismantled at multiple points simultaneously, so that the construction efficiency is improved, and the construction period is shortened.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (5)
1. A construction method of an embedded frame column at an intermediate wall of an underground structure is characterized by comprising the following steps:
dividing a foundation pit into a plurality of pit areas, respectively constructing a ground connection wall of each pit area, and installing a column steel bar structure of a frame column of a basement structure which is superposed with the position of the common ground connection wall in a wall steel bar structure of the common ground connection wall when constructing the common ground connection wall of two adjacent pit areas;
pouring concrete of the common diaphragm wall so that the concrete covers the wall steel bar structures and the column steel bar structures to be solidified to form the common diaphragm wall;
excavating a plurality of pit areas, constructing an underground structure, cutting the common underground diaphragm wall along the outer edge of the frame column before pouring a beam plate of the underground structure at the common underground diaphragm wall, reserving the frame column and breaking the rest common underground diaphragm wall;
and constructing the beam slab and connecting the beam slab to the frame column.
2. The method of claim 1, wherein a connection sleeve is installed in the column reinforcing structure when the column reinforcing structure is installed, concrete of the frame column is chiseled to expose the connection sleeve when the beam slab is poured, and the reinforcing bars of the beam slab are connected to the frame column through the connection sleeve.
3. The construction method of the pre-buried frame column at the intermediate wall of the underground structure according to claim 2, wherein one end of the connection sleeve is connected with an anchoring rib, the anchoring rib is connected to the vertical main rib of the column steel bar structure, a plugging member is detachably inserted into the other end of the connection sleeve, and after the connection sleeve is exposed, the plugging member is removed, and the other end of the connection sleeve is connected to the beam slab steel bar of the beam slab.
4. The method of claim 2, wherein a chiseling layer is reserved on each of both sides of the frame column when the common diaphragm wall is cut, and the chiseling layer is chiseled to expose the connection sleeve when the beam slab is poured.
5. The method of constructing pre-buried frame columns at an intermediate wall of an underground structure according to claim 1, wherein the common diaphragm wall is cut using static force to separate the frame columns when the common diaphragm wall is cut along outer edges of the frame columns.
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| CN202210077799.9A CN114351761B (en) | 2022-01-24 | 2022-01-24 | Construction method of pre-buried frame column at middle partition wall of underground structure |
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| CN202210077799.9A CN114351761B (en) | 2022-01-24 | 2022-01-24 | Construction method of pre-buried frame column at middle partition wall of underground structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305954A (en) * | 2022-08-25 | 2022-11-08 | 中建八局轨道交通建设有限公司 | Two-in-one reinforced wall structure of underground structure and construction method thereof |
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| JP2001355242A (en) * | 2000-06-13 | 2001-12-26 | Toda Constr Co Ltd | Construction method for underground beam in underground continuous wall pile |
| CN104831736A (en) * | 2015-04-15 | 2015-08-12 | 中国建筑第八工程局有限公司 | Support changing method and support changing structure of middle wall of foundation trench |
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| CN108457300A (en) * | 2018-01-19 | 2018-08-28 | 中国建筑第八工程局有限公司 | The construction method of cap excavation method underground longspan structure support replacement |
| CN109610475A (en) * | 2019-01-02 | 2019-04-12 | 中国建筑第八工程局有限公司 | The construction method of existing ground-connecting-wall is removed in deep basal pit |
| CN109736593A (en) * | 2019-02-27 | 2019-05-10 | 广西大学 | Underground engineering group cheats mid-board and cuts method |
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2022
- 2022-01-24 CN CN202210077799.9A patent/CN114351761B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001355242A (en) * | 2000-06-13 | 2001-12-26 | Toda Constr Co Ltd | Construction method for underground beam in underground continuous wall pile |
| CN104831736A (en) * | 2015-04-15 | 2015-08-12 | 中国建筑第八工程局有限公司 | Support changing method and support changing structure of middle wall of foundation trench |
| CN205369301U (en) * | 2015-11-27 | 2016-07-06 | 中国建筑第六工程局有限公司 | Supporting structure of subway transfer section lid digs and props against making interval board |
| CN108457300A (en) * | 2018-01-19 | 2018-08-28 | 中国建筑第八工程局有限公司 | The construction method of cap excavation method underground longspan structure support replacement |
| CN109610475A (en) * | 2019-01-02 | 2019-04-12 | 中国建筑第八工程局有限公司 | The construction method of existing ground-connecting-wall is removed in deep basal pit |
| CN109736593A (en) * | 2019-02-27 | 2019-05-10 | 广西大学 | Underground engineering group cheats mid-board and cuts method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115305954A (en) * | 2022-08-25 | 2022-11-08 | 中建八局轨道交通建设有限公司 | Two-in-one reinforced wall structure of underground structure and construction method thereof |
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