CN114351761B - Construction method of pre-buried frame column at middle partition wall of underground structure - Google Patents
Construction method of pre-buried frame column at middle partition wall of underground structure Download PDFInfo
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- CN114351761B CN114351761B CN202210077799.9A CN202210077799A CN114351761B CN 114351761 B CN114351761 B CN 114351761B CN 202210077799 A CN202210077799 A CN 202210077799A CN 114351761 B CN114351761 B CN 114351761B
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Abstract
The application discloses a construction method of pre-buried frame columns at an intermediate wall of an underground structure, when the frame columns of the underground structure are completely overlapped with the positions of shared diaphragm walls of foundation pits of a partition, the shared diaphragm walls and the frame columns 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 columns are constructed after the shared diaphragm walls are removed is avoided, and on one hand, the time for constructing the frame columns can be saved; on the other hand, the joint wall can be removed at multiple points simultaneously, so that the construction efficiency is improved and the construction period is shortened. The application solves the problems of long construction period and low construction efficiency caused by the sequential construction of the common diaphragm wall and the frame column when the diaphragm wall is overlapped with the frame column of the underground structure.
Description
Technical Field
The application 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
The construction of the deep foundation pit with large area is divided into sections, and the middle partition wall (namely, the underground wall of the underground structure of the original partition) at the joint of the underground structures of two adjacent sections needs to be removed later. When the positions of the frame columns of the underground structure and the intermediate wall coincide, the conventional construction method is to construct the intermediate wall first, then to remove the intermediate wall later and then to cast the frame columns. If the underground structure is multi-layer, after the intermediate wall is dismantled layer by layer from top to bottom, the frame column at the intermediate wall is integrally poured, so that the problems of long construction period and low construction efficiency are caused.
Disclosure of Invention
In order to overcome the defects in the prior art, a construction method of pre-buried frame columns at an intermediate wall of an underground structure is provided at present, so that the problems of long construction period and low construction efficiency caused by sequential construction of a common ground continuous wall and frame columns when the positions of the ground continuous wall and the frame columns of the underground structure are overlapped are solved.
In order to achieve the above object, there is provided a construction method of 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 diaphragm wall of each pit area, and installing a column reinforcement structure of a frame column of a basement structure, which coincides with the position of the common diaphragm wall, in the wall reinforcement structure of the common diaphragm wall when constructing the common diaphragm wall of two adjacent pit areas;
pouring concrete of the shared diaphragm wall, so that the concrete is coated on the wall steel bar structure and the column steel bar structure to be solidified to form the shared diaphragm wall;
excavating a plurality of pit areas, constructing an underground structure, cutting the common diaphragm wall along the outer edge of the frame column before pouring a beam plate of the underground structure at the common diaphragm wall, retaining the frame column and breaking the rest of the common diaphragm wall;
and constructing the beam plate and connecting the beam plate to the frame column.
Further, when the column reinforcement structure is installed, a connecting sleeve is installed in the column reinforcement 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.
Further, one end of the connecting sleeve is connected with an anchoring rib, the anchoring rib is connected to the vertical main rib of the column rib structure, a plugging piece is detachably inserted into the other end of the connecting sleeve, after the connecting sleeve is exposed, the plugging piece is removed, and the other end of the connecting sleeve is connected to the beam slab reinforcing steel bars of the beam slab.
Further, when the shared ground connecting wall is cut, a chiseling layer is reserved on two sides of the frame column respectively, and when the beam slab is poured, the chiseling layer is chiseled to expose the connecting sleeve.
Further, static force is used to cut the common diaphragm wall to separate the frame posts when the common diaphragm wall is cut along the outer edges of the frame posts.
The construction method has the beneficial effects that when the positions of the common diaphragm wall of the underground structure frame column and the partitioned foundation pit are completely overlapped, the common diaphragm wall and the frame column are constructed simultaneously on the premise of ensuring the safety of the structure, a reinforcement cage is formed together and concrete is poured, so that the condition that the frame column is constructed after the common diaphragm wall is removed is avoided, and on one hand, the time for constructing the frame column can be saved; on the other hand, the joint wall can be removed 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 detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
fig. 1 to 5 are schematic views showing steps of a construction method of pre-buried frame columns at an intermediate wall of an underground structure according to an embodiment of the present application.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1 to 5, the present application provides a construction method of an embedded frame column at an intermediate wall of an underground structure, comprising the steps of:
s1: dividing a foundation pit into a plurality of pit areas, respectively constructing a diaphragm wall of each pit area, and installing a column reinforcement structure 21 of a frame column 2 of a basement structure overlapped with the position of the common diaphragm wall 1 in a wall reinforcement structure 11 of the common diaphragm wall 1 when constructing the common diaphragm 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 respectively perform construction of the underground diaphragm wall.
After the foundation pit is partitioned, positioning frame columns overlapped or overlapped with the position of the shared ground connecting wall according to the design drawing of the underground structure. And carrying out block numbering on the underground continuous wall according to the construction drawing, and completely planning the frame columns into the underground continuous wall units, wherein the frame columns are numbered according to the underground continuous wall units in sequence. And (5) lofting and positioning the frame column at a construction site, and leaving a permanent striking mark.
And manufacturing a reinforcement cage (column reinforcement structure) of the frame column. The column reinforcement structure of the frame column and the wall reinforcement structure of the underground diaphragm wall are constructed simultaneously to form an integrated reinforcement cage.
When the integrated reinforcement cage is manufactured, the size of the column reinforcement structure, the reinforcement position of the frame column, the reinforcement position of the ground continuous wall, the connection reinforcement position of the basement floor and the position of the embedded connection sleeve are marked on the reinforcement manufacturing platform. And then placing and welding according to the marked position.
The wall reinforcement structure is constructed according to the requirement of underground continuous wall reinforcement, the reinforcement of the underground wall in the frame column area is unchanged, and when the frame column reinforcement collides with the underground wall reinforcement, the reinforcement takes a large value.
In this embodiment, one end of the connection sleeve 22 is connected with an anchor rib 23, the anchor rib 23 is connected to a vertical main rib of the column steel rib structure 21, a blocking piece is detachably inserted into the other end of the connection sleeve 22, after the connection sleeve 22 is exposed, the blocking piece is removed, and the other end of the connection sleeve 22 is connected to a beam slab steel rib 31 of the beam slab 3.
For the junction of frame post and basement floor (roof beam), reserve the connecting sleeve in the post reinforced structure, the anchor reinforcing bar is connected to connecting sleeve's one side, carries out interim shutoff through the shutoff piece to connecting sleeve's opposite side. When the floor (beam) at the position is to be constructed, the floor (beam) is effectively connected with the connecting sleeve.
And after the integral reinforcement cage is manufactured, calculating the gravity center and the hanging point position of the reinforcement cage again.
S2: concrete of the common diaphragm wall 1 is poured so that the concrete is coated on the wall rebar structures 11 and the column rebar structures 21 to be solidified to form the common diaphragm wall 1.
And (3) after the integrated reinforcement cage is hoisted in place by utilizing the crawler crane, carrying out concrete pouring of the common ground continuous wall.
S3: and excavating a plurality of pit areas, constructing an underground structure, cutting the common diaphragm wall 1 along the outer edge of the frame column 2 before pouring the beam plates 3 of the underground structure at the common diaphragm wall 1, retaining the frame column 2 and breaking the rest of the common diaphragm wall 1.
When the shared diaphragm wall 1 is cut, a chiseling layer is reserved on two sides of the frame column 2 respectively. When cutting the common diaphragm wall 1 along the outer edges of the frame columns 2, static cutting is used to separate the frame columns 2 from the common diaphragm wall 1. The chiseling layer is chiseled off to expose the other end of the connection sleeve 22 when the beam panel 3 is cast.
Specifically, the step of static cutting the common diaphragm wall to separate the frame posts includes:
A. and (3) according to the site lofting of the construction drawing, determining the position of the cut frame column, the cutting line and the cutting section position. 10cm is reserved on two sides of the frame column to serve as chiseling layers (shown in fig. 3 and 4) so as to avoid damage to the column reinforcement structure of the frame caused by cutting.
B. And drilling a rope penetrating hole by adopting a diamond water drill according to the cutting line.
C. And installing and fixing a guide wheel and a rope saw device.
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. And the driving wheel is adjusted to lift the tension, so that the diamond rope is properly tightened, cooling water is supplied, and the driving wheel is started to drive the diamond rope to rotate for cutting.
F. Repeating the above operation, and cutting the separation frame columns in sequence.
G. After the frame column is separated, the pick machine is used for breaking the rest of the shared ground connecting wall separated from the frame column.
H. And (3) cutting the separated frame column, and removing a chiseling layer (namely redundant reinforced concrete) by adopting a manual chiseling mode.
The cutting sequence is from top to bottom, and the frame column numbers are gradually cut and separated from left to right.
S4: the beam plate 3 is constructed and the beam plate 3 is connected to the frame column 2.
According to the construction method of the embedded frame column at the middle partition wall of the underground structure, when the frame column of the underground structure and the position of the shared diaphragm wall of the partitioned foundation pit are completely overlapped, the shared diaphragm 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 situation that the frame column is constructed after the shared diaphragm wall is removed is avoided, and on one hand, the time for constructing the frame column can be saved; on the other hand, the joint wall can be removed at multiple points simultaneously, so that the construction efficiency is improved and the construction period is shortened.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.
Claims (5)
1. The construction method of the embedded frame column at the middle partition wall of the underground structure is characterized by comprising the following steps:
dividing a foundation pit into a plurality of pit areas, respectively constructing a diaphragm wall of each pit area, and installing a column reinforcement structure of a frame column of a basement structure, which coincides with the position of the common diaphragm wall, in the wall reinforcement structure of the common diaphragm wall when constructing the common diaphragm wall of two adjacent pit areas;
pouring concrete of the shared diaphragm wall, so that the concrete is coated on the wall steel bar structure and the column steel bar structure to be solidified to form the shared diaphragm wall;
excavating a plurality of pit areas, constructing an underground structure, cutting the common diaphragm wall along the outer edge of the frame column before pouring a beam plate of the underground structure at the common diaphragm wall, retaining the frame column and breaking the rest of the common diaphragm wall;
and constructing the beam plate and connecting the beam plate to the frame column.
2. The method of constructing a pre-buried frame column at an intermediate wall of an underground structure according to claim 1, wherein a connection sleeve is installed in the column reinforcement structure when the column reinforcement structure is installed, concrete of the frame column is chiseled to expose the connection sleeve when the beam slab is poured, and reinforcing bars of the beam slab are connected to the frame column through the connection sleeve.
3. The construction method of an embedded frame column at an intermediate wall of an underground structure according to claim 2, wherein one end of the connection sleeve is connected with an anchor bar, the anchor bar is connected to a vertical main bar of the column bar structure, the other end of the connection sleeve is detachably inserted with a blocking piece, the blocking piece is removed after the connection sleeve is exposed, and the other end of the connection sleeve is connected to a beam slab bar of the beam slab.
4. The method for constructing a pre-buried frame column at an intermediate wall of an underground structure according to claim 2, wherein a chiseling layer is reserved on both sides of the frame column, respectively, when the common diaphragm wall is cut, and the chiseling layer is chiseled to expose the connection sleeve when the beam slab is cast.
5. The method of constructing pre-buried frame posts at an intermediate wall of an underground structure according to claim 1, wherein the common diaphragm wall is cut by static force to separate the frame posts while the common diaphragm wall is cut along an outer edge of the frame posts.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN114351761B true CN114351761B (en) | 2023-10-13 |
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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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| 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 |
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- 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 |
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