CN114032959A - Construction method for asynchronous excavation, staggered support removal and replacement of ultra-deep basement partition - Google Patents
Construction method for asynchronous excavation, staggered support removal and replacement of ultra-deep basement partition Download PDFInfo
- Publication number
- CN114032959A CN114032959A CN202111560088.9A CN202111560088A CN114032959A CN 114032959 A CN114032959 A CN 114032959A CN 202111560088 A CN202111560088 A CN 202111560088A CN 114032959 A CN114032959 A CN 114032959A
- Authority
- CN
- China
- Prior art keywords
- wall
- pile
- foundation pit
- steel pipe
- column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 56
- 238000005192 partition Methods 0.000 title claims abstract description 30
- 238000009412 basement excavation Methods 0.000 title claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 104
- 239000010959 steel Substances 0.000 claims abstract description 104
- 230000005540 biological transmission Effects 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000000638 solvent extraction Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Foundations (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a construction method for asynchronously excavating, staggering, detaching and replacing supports of an ultra-deep basement in a partitioned mode, which comprises the following steps: firstly, constructing an occlusive pile and a steel pipe upright pile; secondly, constructing a crown beam and a first support beam; thirdly, partitioning a foundation pit; fourthly, constructing a force transfer column of the temporary structure and dismantling a first third support beam; fifthly, removing the first second support beam; sixthly, dismantling the first support beam and the second support beam; constructing a first structure top plate and removing a second support beam II; eighthly, removing the steel pipe upright piles in the first foundation pit area layer by layer and backfilling; ninth, dismantling the second support beam; tenth, constructing a second structure top plate; and eleven, removing the steel pipe upright post piles in the second foundation pit area layer by layer and backfilling. The method flexibly selects the steel pipe upright post pile as the partition steel pipe upright post pile, constructs a temporary structure force transmission post beside each partition steel pipe upright post pile, and utilizes the stress balance of a force transmission path to dismantle the supporting beam in a layered and sectional manner and construct the structural plate to finish a part of the basement main body structure in advance.
Description
Technical Field
The invention belongs to the technical field of asynchronous excavation staggered support removal and replacement of super-deep basement partitions, and particularly relates to a construction method for asynchronous excavation staggered support removal and replacement of super-deep basement partitions.
Background
The construction volume of urban underground rail transit construction is increased, urban land is short, the existing ultra-deep basement construction engineering is inevitably close to the urban underground rail, the construction of the ultra-deep basement can interfere with the adjacent existing building, the traditional support dismounting and replacement is completed by a whole layer of main structure, the inner support can be dismounted, for a foundation pit with large regional span, the whole layer of main structure of the basement must be waited, the construction period is delayed, or the foundation pit is partitioned by a temporary wall body with a fixed position, and the construction is not flexible enough; therefore, at present, a construction method for asynchronously excavating, staggering, disassembling and replacing supports for an ultra-deep basement partition is lacked, partition steel pipe upright posts are flexibly selected in a foundation pit for partitioning the foundation pit in a layered and segmented mode, and only a stress path of a supporting beam needs to be transmitted and completed, the supporting beam can continue to be constructed upwards in sequence, so that construction of a part of basement main body structures is completed in advance, and construction and deployment are facilitated.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a construction method for asynchronously excavating, staggering, replacing and supporting an ultra-deep basement in a partitioning mode according to the defects in the prior art, steel pipe upright piles are flexibly selected in a foundation pit area to serve as partitioning steel pipe upright piles according to the actual construction progress, a temporary structure force transmission column is constructed beside each partitioning steel pipe upright pile, supporting beams are dismantled in a layered and segmented mode by utilizing the stress balance of a force transmission path, a structural plate is constructed, the foundation pit displacement is controlled within the early warning range, the influence on surrounding buildings and structures is minimum, a part of construction of a main structure of the basement is completed in advance, construction deployment is facilitated, and popularization and use are facilitated.
In order to solve the technical problems, the invention adopts the technical scheme that: the construction method for asynchronously excavating, staggering, dismantling and replacing the support of the ultra-deep basement in a partitioned mode is characterized by comprising the following steps:
step one, constructing an occlusive pile and a steel pipe upright pile on the ground: driving a plurality of secant piles around the outer edge of the foundation pit area, driving a plurality of steel pipe upright piles in the foundation pit area, and reserving empty pile positions at the tops of the secant piles and the steel pipe upright piles;
step two, constructing the crown beam and the first support beam: constructing a crown beam at the empty pile position at the top of the secant pile, and connecting a plurality of steel pipe upright piles with a plurality of secant piles by using a first supporting beam;
step three, foundation pit partitioning: the row of steel pipe upright piles positioned in the middle of the inside of the foundation pit in the plurality of steel pipe upright piles divides the foundation pit into a first foundation pit area and a second foundation pit area, the row of steel pipe upright piles comprises a plurality of subarea steel pipe upright piles, and the construction of the first foundation pit area is faster than that of the second foundation pit area;
carrying out foundation pit earthwork excavation, support of parts of a second support beam and a third support beam in the first foundation pit area and construction of a first foundation top in a layered mode in the first foundation pit area;
carrying out foundation pit earthwork excavation in a layering manner in the second foundation pit area, and supporting parts of the second supporting beam and the third supporting beam in the second foundation pit area;
the first support beam is divided into a first support beam and a second support beam by a row of steel pipe upright piles positioned in the middle of the foundation pit;
the second support beam is divided into a first support beam and a second support beam by a row of steel pipe upright piles positioned in the middle of the inside of the foundation pit;
the third support beam is divided into a first support beam and a second support beam by a row of steel pipe upright piles positioned in the middle of the foundation pit;
step four, constructing the force transfer column of the temporary structure and dismantling a first third supporting beam, wherein the process is as follows:
step 401, arranging a temporary structure force transmission column on one side of the partition steel pipe upright column pile, wherein the height of the temporary structure force transmission column is higher than that of a second support beam;
step 402, arranging a third layer of force transfer beam on the temporary structure force transfer column towards one side of the first foundation pit area, wherein the height of the third layer of force transfer beam is lower than that of a first third support beam, arranging a first third structure outer wall support short column on a first secant pile opposite to one side, far away from the partition steel pipe upright column, of the temporary structure force transfer column, and the first third structure outer wall support short column is as high as the third layer of force transfer beam;
step 403, the exposed end of the first supporting short column of the third structural outer wall abuts against the outer side of the top of the first third structural outer wall, one end of the first third structural plate is connected with the inner side of the top of the first third structural outer wall, and the other end of the first third structural plate is connected with the third layer of force transmission beam;
step 404, removing the first third support beam;
step 405, completing foundation pit earthwork excavation in the second foundation pit area;
step five, dismantling the first second supporting beam, wherein the process is as follows:
step 501, the height of the temporary structure force transmission column is increased, and the height of the temporary structure force transmission column is higher than that of the second support beam;
step 502, arranging a second layer of force transfer beam on the temporary structure force transfer column towards one side of the first foundation pit area, wherein the height of the second layer of force transfer beam is lower than that of a second support beam, arranging a first second structure outer wall support short column on a first secant pile opposite to one side of the temporary structure force transfer column far away from the partition steel pipe upright column pile, and enabling the first second structure outer wall support short column to be as high as the second layer of force transfer beam;
step 503, the exposed end of the first supporting short column of the first structural outer wall abuts against the outer side of the top of the first structural outer wall, one end of the first structural plate is connected with the inner side of the top of the first structural outer wall, and the other end of the first structural plate is connected with the second layer of force transfer beam;
step 504, removing the first support beam;
step 505, completing construction of a second foundation top in the second foundation pit area;
step six, dismantling the first support beam and the second support beam, wherein the process is as follows:
step 601, the height of the temporary structure force transmission column is increased, and the height of the temporary structure force transmission column is higher than that of the first support beam II;
step 602, arranging a first layer of force transfer beam on the temporary structure force transfer column towards one side of a first foundation pit area, wherein the height of the first layer of force transfer beam is lower than that of a first support beam II, arranging a first structure outer wall support short column on a first snap-in pile opposite to one side, far away from a partition steel pipe upright column, of the temporary structure force transfer column, and the first structure outer wall support short column is as high as the first layer of force transfer beam;
603, abutting the exposed end of the first structure outer wall supporting short column against the outer side of the top of the first structure outer wall, connecting one end of the first structure plate with the inner side of the top of the first structure outer wall, and connecting the other end of the first structure plate with the first layer of force transfer beam;
step 604, removing the first support beam;
605, arranging a third structure outer wall supporting short column II with the same height as the third layer of force transfer beam on a second occlusive pile opposite to one side, in contact with the partition steel pipe upright column pile, of the temporary structure force transfer column;
606, enabling the exposed end of the second supporting short column of the third structural outer wall to abut against the outer side of the top of the second third structural outer wall, connecting one end of the second third structural plate with the inner side of the top of the second third structural outer wall, and connecting the other end of the first third structural plate with a third layer of force transmission beam after penetrating through the temporary structural force transmission column;
step 607, detaching the second support beam;
step seven, constructing a first structure top plate and dismantling a second support beam II, wherein the process is as follows:
701, arranging a structural top plate force transmission beam on the temporary structural force transmission column towards the top of one side of the first foundation pit area, and arranging a first structural top plate outer wall supporting short column on the top of the first occlusive pile;
step 702, the exposed end of the supporting short column of the first structure top plate outer wall is abutted against the outer side of the top of the first structure top plate outer wall, one end of the first structure top plate is connected with the inner side of the top of the first structure top plate outer wall, and the other end of the first structure top plate is connected with the force transmission beam of the structure top plate;
step 703, arranging a second structure outer wall supporting short column II with the same height as the second layer of force transfer beam on a second occlusive pile opposite to the side, in contact with the partition steel pipe upright column, of the temporary structure force transfer column;
704, enabling the exposed end of the second structure outer wall supporting short column II to abut against the outer side of the top of the second structure outer wall, connecting one end of a second structure plate II with the inner side of the top of the second structure outer wall, and connecting the other end of the second structure plate II with a second layer of force transfer beam through the temporary structure force transfer column;
step 705, removing a second support beam II;
step eight, removing the steel pipe upright piles in the first foundation pit area layer by layer, and filling backfill materials between the first occlusive piles and the first outer wall;
step nine, dismantling a second support beam, wherein the process is as follows:
step 901, arranging a second structural outer wall supporting short column with the same height as the first layer of force transfer beam on a second occlusive pile opposite to one side, in contact with the partition steel pipe upright column, of the temporary structural force transfer column;
902, enabling the exposed end of the second support short column of the first structure outer wall to abut against the outer side of the top of the second first structure outer wall, connecting one end of the second first structure plate with the inner side of the top of the second first structure outer wall, and connecting the other end of the second first structure plate with the first layer of force transfer beam by penetrating through the temporary structure force transfer column;
step 903, dismantling a second support beam;
step ten, constructing a second structure top plate: a second structure top plate outer wall supporting short column is arranged at the top of the second secant pile, the exposed end of the second structure top plate outer wall supporting short column is abutted against the outer side of the top of the second structure top plate outer wall, one end of the second structure top plate is connected with the inner side of the top of the second structure top plate outer wall, and the other end of the second structure top plate penetrates through the temporary structure force transmission column to be connected with the structure top plate force transmission beam;
and eleventh, removing the steel pipe upright piles in the second foundation pit area layer by layer, and filling backfill between the second occlusive piles and the second outer wall.
The construction method for asynchronously excavating, staggering, dismantling and replacing the support for the subareas of the ultra-deep basement is characterized by comprising the following steps of: the occlusive pile located in the first foundation pit area in the plurality of occlusive piles is a first occlusive pile, the occlusive pile located in the second foundation pit area in the plurality of occlusive piles is a second occlusive pile, the steel pipe upright pile located in the first foundation pit area in the plurality of steel pipe upright piles is a first steel pipe upright pile, and the steel pipe upright pile located in the second foundation pit area in the plurality of steel pipe upright piles is a second steel pipe upright pile.
The construction method for asynchronously excavating, staggering, dismantling and replacing the support for the subareas of the ultra-deep basement is characterized by comprising the following steps of: one end of the first support beam far away from the second support beam is connected with the first crown beam, and one end of the first support beam far away from the first support beam is connected with the second crown beam;
one end of the first second supporting beam far away from the second supporting beam and one end of the first third supporting beam far away from the third supporting beam are connected with the first snap pile through the first waist beam, and one end of the second supporting beam far away from the first second supporting beam and one end of the third supporting beam far away from the first third supporting beam are connected with the second snap pile through the second waist beam.
The construction method for asynchronously excavating, staggering, dismantling and replacing the support for the subareas of the ultra-deep basement is characterized by comprising the following steps of: the first structure top plate outer wall supporting short column is connected with the first occlusive pile through a first crown beam; and the supporting short column of the top plate outer wall of the second structure is connected with the second snap pile through a second crown beam.
The construction method has the advantages that the steel pipe upright post pile is flexibly selected as the partitioned steel pipe upright post pile in the foundation pit area according to the actual construction progress, a temporary structure force transmission column is constructed beside each partitioned steel pipe upright post pile, the supporting beams are dismantled in a layered and segmented mode by utilizing the stress balance of the force transmission path, the structural plate is constructed, the foundation pit displacement is guaranteed to be controlled within the early warning range, the influence on surrounding buildings and structures is minimum, a part of basement main body structure construction is completed in advance, construction deployment is facilitated, and popularization and use are facilitated.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic view of the partition structure of the ultra-deep basement.
Fig. 2 is a sectional view a-a of the foundation pit in the first foundation pit area after the construction of the foundation cap and the excavation of the foundation pit in the second foundation pit area in fig. 1.
Fig. 3 is a sectional view a-a of the foundation pit in the first foundation pit area and the second foundation pit area in fig. 1 at the construction completion stage of foundation pit earth excavation.
Fig. 4 is a sectional view a-a of the first construction of the second structural slab in the first foundation pit area and the second foundation pit area of fig. 1 at the stage of the foundation cap construction.
Fig. 5 is a sectional view a-a of the first construction site in the first foundation pit area and the third construction site in the second foundation pit area in fig. 1.
Fig. 6 is a sectional view a-a of the first structural ceiling and the second structural slab in the first and second foundation pit areas in fig. 1 at a second construction stage.
Fig. 7 is a sectional view a-a of the first foundation pit area of fig. 1 at a second construction stage of removing a steel pipe stud section under the first structural roof and constructing the first structural slab in the second foundation pit area.
Fig. 8 is a sectional view a-a of the construction stage of removing a first structural plate, a lower steel pipe stud segment and constructing a second structural roof in the second foundation pit area in the first foundation pit area in fig. 1.
Fig. 9 is a sectional view a-a of the construction stage of removing a lower steel pipe stud pile section of the second structural plate in the first foundation pit area and removing a lower steel pipe stud pile section of the second structural top plate in the second foundation pit area in fig. 1.
Fig. 10 is a sectional view a-a of the construction stage of removing the lower steel pipe stud section of the third structural plate in the first foundation pit area and removing the lower steel pipe stud section of the first structural top plate in the second foundation pit area in fig. 1.
Fig. 11 is a sectional view a-a of the basement main structure in the first foundation pit area in fig. 1 at the construction stage when the construction of the steel pipe upright post segment under the second structure top plate is completed and removed in the second foundation pit area.
Fig. 12 is a sectional view a-a of the completed construction of the main structure of the basement in the foundation pit area of fig. 1.
FIG. 13 is a block flow diagram of a method of the present invention.
Description of reference numerals:
1-a first occlusive pile; 2-a first occlusive pile; 3, a first steel pipe upright pile;
4, a second steel pipe upright pile; 5-a first crown beam; 6-second crown beam;
7, a first supporting beam I; 8, a second support beam; 9-a first wale;
10-second wale; 11-a first second supporting beam; 12-a second support beam II;
13-a third supporting beam I; 14-a second support beam; 15-foundation top;
16-foundation pit earthwork; 17-zoning steel pipe upright post piles; 18-temporary structural force transfer columns;
19-1-a first supporting short column of the third structure outer wall; 19-2-a first supporting short column of the second structure outer wall;
19-3-first structural exterior wall supporting short column I; 19-4-first structure roof outer wall support studs;
20-1 — a third structure exterior wall one; 20-2-a first external wall of a second structure;
20-3 — first structural exterior wall one; 20-4 — a first structural roof outer wall;
21-1-third layer of force transfer beam; 21-2-second layer of transfer beam;
21-3-first layer of transfer beam; 21-4-structural roof force transfer beam;
22-1-third structural panel one; 22-2 — a second structural panel one;
22-3 — first structural panel one; 22-4 — a first structural ceiling;
23-backfill; 24-1-a second supporting short column of the third structure outer wall;
24-2-a second structural outer wall supporting short column II; 24-3-a second supporting short column of the first structure outer wall;
24-4-a second structure roof outer wall support stud; 25-1-a second exterior wall of a third structure;
25-2-a second structural exterior wall II; 25-3-a first external wall of a second structure;
25-4-a second structure roof exterior wall; 26-1-third structural panel two;
26-2 — a second structural panel two; 26-3 — a second structural panel; 26-4 — second structural ceiling.
Detailed Description
As shown in fig. 1 to 13, the construction method for asynchronously excavating, staggering, dismantling and supporting an ultra-deep basement in a partitioned mode comprises the following steps:
step one, constructing an occlusive pile and a steel pipe upright pile on the ground: driving a plurality of secant piles around the outer edge of the foundation pit area, driving a plurality of steel pipe upright piles in the foundation pit area, and reserving empty pile positions at the tops of the secant piles and the steel pipe upright piles;
step two, constructing the crown beam and the first support beam: constructing a crown beam at the empty pile position at the top of the secant pile, and connecting a plurality of steel pipe upright piles with a plurality of secant piles by using a first supporting beam;
step three, foundation pit partitioning: the row of steel pipe upright piles positioned in the middle of the inside of the foundation pit in the plurality of steel pipe upright piles divides the foundation pit into a first foundation pit area and a second foundation pit area, the row of steel pipe upright piles comprises a plurality of subarea steel pipe upright piles 17, and the construction of the first foundation pit area is faster than that of the second foundation pit area;
carrying out foundation pit earthwork 16 excavation, support of parts of a second support beam and a third support beam in the first foundation pit area and construction of a first foundation top 15 in a layered mode in the first foundation pit area;
carrying out foundation pit earthwork 16 excavation in a second foundation pit area in a layered mode, and supporting parts of a second supporting beam and a third supporting beam in the second foundation pit area;
the first support beam is divided into a first support beam I7 and a first support beam II 8 by a row of steel pipe upright piles positioned in the middle of the inside of the foundation pit;
the second support beam is divided into a first support beam 11 and a second support beam 12 by a row of steel pipe upright piles positioned in the middle of the foundation pit;
the third support beam is divided into a first support beam 13 and a second support beam 14 by a row of steel pipe upright piles positioned in the middle of the foundation pit;
step four, constructing the force transfer column of the temporary structure and dismantling a first third supporting beam, wherein the process is as follows:
step 401, arranging a temporary structure force transfer column 18 on one side of the partition steel pipe upright column 17, wherein the height of the temporary structure force transfer column 18 is higher than that of the second support beam 14;
step 402, arranging a third layer of force transfer beam 21-1 on the temporary structure force transfer column 18 towards one side of the first foundation pit area, wherein the height of the third layer of force transfer beam 21-1 is lower than that of a third support beam 13, arranging a third structure outer wall support short column I19-1 on the first snap-in pile 1 opposite to one side, far away from the partition steel pipe upright column pile 17, of the temporary structure force transfer column 18, and enabling the third structure outer wall support short column I19-1 to be as high as the third layer of force transfer beam 21-1;
step 403, the exposed end of the first supporting short column 19-1 of the third structural outer wall abuts against the outer side of the top of the first 20-1 of the third structural outer wall, one end of a first 22-1 of the third structural plate is connected with the inner side of the top of the first 20-1 of the third structural outer wall, and the other end of the first 22-1 of the third structural plate is connected with a third layer of force transmission beam 21-1;
step 404, removing the third support beam I13;
step 405, completing excavation of foundation pit earthwork 16 in the second foundation pit area;
step five, dismantling the first second supporting beam, wherein the process is as follows:
step 501, the height of the temporary structure force transmission column 18 is increased, and the height of the temporary structure force transmission column 18 is higher than that of the second support beam 12;
step 502, arranging a second layer of force transfer beam 21-2 on the temporary structure force transfer column 18 towards one side of the first foundation pit area, wherein the height of the second layer of force transfer beam 21-2 is lower than that of a second support beam 12, arranging a first second structure outer wall support short column 19-2 on the first snap pile 1 opposite to one side, far away from the partition steel pipe upright column pile 17, of the temporary structure force transfer column 18, and the first second structure outer wall support short column 19-2 is as high as the second layer of force transfer beam 21-2;
step 503, the exposed end of the first supporting short column 19-2 of the first structural outer wall is abutted against the outer side of the top of the first 20-2 of the second structural outer wall, one end of a first 22-2 of the second structural plate is connected with the inner side of the top of the first 20-2 of the second structural outer wall, and the other end of the first 22-2 of the second structural plate is connected with a second layer of force transmission beam 21-2;
step 504, removing the first support beam 11;
step 505, completing construction of a second foundation top in the second foundation pit area;
step six, dismantling the first support beam and the second support beam, wherein the process is as follows:
step 601, the height of the temporary structure force transmission column 18 is increased, and the height of the temporary structure force transmission column 18 is higher than that of the first support beam II 8;
step 602, arranging a first layer of force transfer beams 21-3 on the temporary structure force transfer column 18 towards one side of a first foundation pit area, wherein the height of the first layer of force transfer beams 21-3 is lower than that of a first support beam II 8, arranging a first structure outer wall support short column I19-3 on a first snap-in pile 1 opposite to one side, far away from a partition steel pipe upright column pile 17, of the temporary structure force transfer column 18, and enabling the first structure outer wall support short column I19-3 to be as high as the first layer of force transfer beams 21-3;
603, the exposed end of the first structure outer wall supporting short column 19-3 is abutted against the outer side of the top of the first structure outer wall 20-3, one end of a first structure plate 22-3 is connected with the inner side of the top of the first structure outer wall 20-3, and the other end of the first structure plate 22-3 is connected with the first layer of force transmission beam 21-3;
step 604, removing the first support beam I7;
605, arranging a second third structure outer wall supporting short column 24-1 with the same height as that of a third layer of force transfer beam 21-1 on the second occlusive pile 2 opposite to the side, in contact with the partition steel pipe upright pile 17, of the temporary structure force transfer column 18;
606, the exposed end of the second supporting short column 24-1 of the third structural outer wall is abutted against the outer side of the top of the second 25-1 of the third structural outer wall, one end of a second 26-1 of the third structural plate is connected with the inner side of the top of the second 25-1 of the third structural outer wall, and the other end of a first 22-1 of the third structural plate penetrates through the temporary structural force transfer column 18 to be connected with a third layer of force transfer beam 21-1;
step 607, removing the second support beam 14;
step seven, constructing a first structure top plate and dismantling a second support beam II, wherein the process is as follows:
701, arranging a structural roof force transfer beam 21-4 on the temporary structural force transfer column 18 towards the top of one side of the first foundation pit area, and arranging a first structural roof outer wall supporting short column 19-4 on the top of the first occlusive pile 1;
702, abutting the exposed end of the supporting short column 19-4 of the outer wall of the first structure top plate against the outer side of the top of the outer wall 20-4 of the first structure top plate, connecting one end of the first structure top plate 22-4 with the inner side of the top of the outer wall 20-4 of the first structure top plate, and connecting the other end of the first structure top plate 22-4 with the force transmission beam 21-4 of the structure top plate;
703, arranging a second structure outer wall supporting short column second 24-2 with the same height as the second layer of force transfer beam 21-2 on the second occlusive pile 2 opposite to the side, in contact with the partition steel pipe upright pile 17, of the temporary structure force transfer column 18;
step 704, the exposed end of the second structure outer wall supporting short column II 24-2 is abutted against the outer side of the top of the second structure outer wall II 25-2, one end of a second structure plate II 26-2 is connected with the inner side of the top of the second structure outer wall II 25-2, and the other end of the second structure plate II 22-2 penetrates through the temporary structure force transfer column 18 to be connected with a second layer of force transfer beam 21-2;
step 705, removing the second support beam II 12;
step eight, removing the steel pipe upright piles in the first foundation pit area layer by layer, and filling backfill materials 23 between the first occlusive pile 1 and the first outer wall;
step nine, dismantling a second support beam, wherein the process is as follows:
step 901, arranging a second support short column 24-3 of the first structure outer wall, which is as high as the first layer of transmission beam 21-3, on the second occlusive pile 2 opposite to the side, which is in contact with the partition steel pipe upright pile 17, of the temporary structure transmission column 18;
step 902, the exposed end of the second support short column 24-3 of the first structure outer wall abuts against the outer side of the top of the second 25-3 of the first structure outer wall, one end of the second 26-3 of the first structure plate is connected with the inner side of the top of the second 25-3 of the first structure outer wall, and the other end of the second 22-3 of the first structure plate penetrates through the temporary structure force transfer column 18 to be connected with the first layer of force transfer beam 21-3;
step 903, dismantling the second support beam 8 of the first pass;
step ten, constructing a second structure top plate: a second structure top plate outer wall supporting short column 24-4 is arranged at the top of the second snap pile 2, the exposed end of the second structure top plate outer wall supporting short column 24-4 is abutted against the outer side of the top of the second structure top plate outer wall 25-4, one end of a second structure top plate 26-4 is connected with the inner side of the top of the second structure top plate outer wall 25-4, and the other end of the second structure top plate 22-4 penetrates through the temporary structure force transfer column 18 to be connected with a structure top plate force transfer beam 21-4;
eleven, removing the steel pipe upright piles in the second foundation pit area layer by layer, and filling backfill 23 between the second occlusive pile 2 and the outer wall II.
In this embodiment, among the plurality of occlusive piles, the occlusive pile located in the first foundation pit area is a first occlusive pile 1, among the plurality of occlusive piles, the occlusive pile located in the second foundation pit area is a second occlusive pile 2, among the plurality of steel pipe stud piles, the steel pipe stud pile located in the first foundation pit area is a first steel pipe stud pile 3, and among the plurality of steel pipe stud piles, the steel pipe stud pile located in the second foundation pit area is a second steel pipe stud pile 4.
In the embodiment, one end of the first support beam I7, which is far away from the first support beam II 8, is connected with the first crown beam 5, and one end of the first support beam II 8, which is far away from the first support beam I7, is connected with the second crown beam 6;
one end of the first second support beam 11, which is far away from the second support beam 12, and one end of the first third support beam 13, which is far away from the third support beam 14, are connected with the first snap pile 1 through the first wale 9, and one end of the second support beam 12, which is far away from the first second support beam 11, and one end of the third support beam 14, which is far away from the first third support beam 13, are connected with the second snap pile 2 through the second wale 10.
In this embodiment, the first structural roof outer wall support stub 19-4 is connected to the first spud 1 by a first crown beam 5; the second structural roof outer wall support stub 24-4 is connected to the second spud 2 by a second crown beam 6.
When the method is used, steel pipe upright posts are flexibly selected as the subarea steel pipe upright post in the foundation pit area according to the actual construction progress, a temporary structure force transmission post is constructed beside each subarea steel pipe upright post, the support beams are dismantled in a layered and sectional mode by utilizing the stress balance of the force transmission path, the structural plate is constructed, the foundation pit displacement is guaranteed to be controlled within the early warning range, the influence on peripheral buildings and structures is minimum, a part of basement main body structure construction is completed in advance, and the construction deployment is very facilitated.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (4)
1. The construction method for asynchronously excavating, staggering, dismantling and replacing the support of the ultra-deep basement in a partitioned mode is characterized by comprising the following steps:
step one, constructing an occlusive pile and a steel pipe upright pile on the ground: driving a plurality of secant piles around the outer edge of the foundation pit area, driving a plurality of steel pipe upright piles in the foundation pit area, and reserving empty pile positions at the tops of the secant piles and the steel pipe upright piles;
step two, constructing the crown beam and the first support beam: constructing a crown beam at the empty pile position at the top of the secant pile, and connecting a plurality of steel pipe upright piles with a plurality of secant piles by using a first supporting beam;
step three, foundation pit partitioning: the foundation pit is divided into a first foundation pit area and a second foundation pit area by a row of steel pipe upright piles positioned in the middle of the interior of the foundation pit in the plurality of steel pipe upright piles, the row of steel pipe upright piles comprises a plurality of subarea steel pipe upright piles (17), and the construction of the first foundation pit area is faster than that of the second foundation pit area;
carrying out foundation pit earthwork (16) excavation, support of parts of a second support beam and a third support beam in the first foundation pit area and construction of a first foundation top (15) in a layered mode in the first foundation pit area;
the second foundation pit area is internally layered for foundation pit earthwork (16) excavation, and the second supporting beam and the third supporting beam are positioned on the supports of the parts in the second foundation pit area;
the first support beam is divided into a first support beam I (7) and a second support beam I (8) by a row of steel pipe upright piles positioned in the middle of the foundation pit;
the second support beam is divided into a first support beam (11) and a second support beam (12) by a row of steel pipe upright piles positioned in the middle of the foundation pit;
the third support beam is divided into a first support beam (13) and a second support beam (14) by a row of steel pipe upright piles positioned in the middle of the foundation pit;
step four, constructing the force transfer column of the temporary structure and dismantling a first third supporting beam, wherein the process is as follows:
step 401, arranging a temporary structure force transmission column (18) on one side of a partition steel pipe upright column pile (17), wherein the height of the temporary structure force transmission column (18) is higher than that of a second support beam (14);
step 402, arranging a third layer of force transfer beam (21-1) on the temporary structure force transfer column (18) towards one side of the first foundation pit area, wherein the height of the third layer of force transfer beam (21-1) is lower than that of a first support beam (13), arranging a first third structure outer wall support short column (19-1) on the first snap pile (1) opposite to one side, far away from the partition steel pipe upright column pile (17), of the temporary structure force transfer column (18), and the first third structure outer wall support short column (19-1) is as high as the third layer of force transfer beam (21-1);
step 403, the exposed end of the first supporting short column (19-1) of the third structure outer wall is abutted against the outer side of the top of the first third structure outer wall (20-1), one end of the first third structure plate (22-1) is connected with the inner side of the top of the first third structure outer wall (20-1), and the other end of the first third structure plate (22-1) is connected with the third layer of force transmission beam (21-1);
step 404, removing a first third support beam (13);
step 405, finishing excavation of foundation pit earthwork (16) in the second foundation pit area;
step five, dismantling the first second supporting beam, wherein the process is as follows:
step 501, the height of the temporary structure force transmission column (18) is increased, and the height of the temporary structure force transmission column (18) is higher than that of the second support beam (12);
502, arranging a second layer of force transfer beam (21-2) on the temporary structure force transfer column (18) towards one side of the first foundation pit area, wherein the height of the second layer of force transfer beam (21-2) is lower than that of a second support beam (12), arranging a first structure outer wall support short column (19-2) on a first snap-in pile (1) opposite to one side, far away from the partition steel pipe upright column pile (17), of the temporary structure force transfer column (18), and the first structure outer wall support short column (19-2) is as high as the second layer of force transfer beam (21-2);
step 503, the exposed end of the first supporting short column (19-2) of the first structure outer wall is abutted against the outer side of the top of the first structure outer wall (20-2), one end of the first second structure plate (22-2) is connected with the inner side of the top of the first second structure outer wall (20-2), and the other end of the first second structure plate (22-2) is connected with the second layer of force transmission beam (21-2);
step 504, removing the first support beam (11);
step 505, completing construction of a second foundation top in the second foundation pit area;
step six, dismantling the first support beam and the second support beam, wherein the process is as follows:
step 601, the height of the temporary structure force transmission column (18) is increased, and the height of the temporary structure force transmission column (18) is higher than that of the first support beam II (8);
step 602, arranging a first layer of force transfer beam (21-3) on the temporary structure force transfer column (18) towards one side of a first foundation pit area, wherein the height of the first layer of force transfer beam (21-3) is lower than that of a first support beam II (8), arranging a first structure outer wall support short column I (19-3) on a first snap pile (1) which is opposite to one side, far away from a partition steel pipe upright column pile (17), of the temporary structure force transfer column (18), and enabling the first structure outer wall support short column I (19-3) to be as high as the first layer of force transfer beam (21-3);
603, the exposed end of the first structure outer wall supporting short column (19-3) is abutted against the outer side of the top of the first structure outer wall (20-3), one end of the first structure plate (22-3) is connected with the inner side of the top of the first structure outer wall (20-3), and the other end of the first structure plate (22-3) is connected with the first layer of force transmission beam (21-3);
step 604, removing the first support beam I (7);
605, arranging a second third structure outer wall supporting short column (24-1) with the same height as that of a third layer of force transfer beam (21-1) on the second snap pile (2) opposite to the side, in contact with the partition steel pipe upright column pile (17), of the temporary structure force transfer column (18);
606, the exposed end of the second third-structure outer wall supporting short column (24-1) is abutted against the outer side of the top of the second third-structure outer wall (25-1), one end of the second third-structure plate (26-1) is connected with the inner side of the top of the second third-structure outer wall (25-1), and the other end of the first third-structure plate (22-1) penetrates through the temporary structure force transfer column (18) to be connected with the third layer of force transfer beam (21-1);
step 607, removing the second support beam (14);
step seven, constructing a first structure top plate and dismantling a second support beam II, wherein the process is as follows:
701, arranging a structural roof force transmission beam (21-4) on the temporary structural force transmission column (18) towards the top of one side of the first foundation pit area, and arranging a first structural roof outer wall supporting short column (19-4) on the top of the first occlusive pile (1);
702, the exposed end of the supporting short column (19-4) of the outer wall of the first structure top plate is abutted against the outer side of the top of the outer wall (20-4) of the first structure top plate, one end of the first structure top plate (22-4) is connected with the inner side of the top of the outer wall (20-4) of the first structure top plate, and the other end of the first structure top plate (22-4) is connected with a force transmission beam (21-4) of the structure top plate;
703, arranging a second structure outer wall supporting short column II (24-2) with the same height as the second layer of force transfer beam (21-2) on the second snap pile (2) opposite to the side, which is in contact with the partition steel pipe upright column pile (17), of the temporary structure force transfer column (18);
step 704, the exposed end of the second structure outer wall supporting short column II (24-2) is abutted against the outer side of the top of the second structure outer wall II (25-2), one end of the second structure plate II (26-2) is connected with the inner side of the top of the second structure outer wall II (25-2), and the other end of the second structure plate II (22-2) penetrates through the temporary structure force transfer column (18) to be connected with the second layer of force transfer beam (21-2);
step 705, removing a second support beam II (12);
step eight, removing the steel pipe upright piles in the first foundation pit area layer by layer, and filling backfill materials (23) between the first occlusive pile (1) and the first outer wall;
step nine, dismantling a second support beam, wherein the process is as follows:
step 901, arranging a second supporting short column (24-3) of the first structure outer wall with the same height as the first layer of force transfer beam (21-3) on a second snap pile (2) which is just opposite to one side of the temporary structure force transfer column (18) contacted with the partition steel pipe upright column pile (17);
step 902, enabling the exposed end of the second support short column (24-3) of the first structure outer wall to abut against the outer side of the top of the second first structure outer wall (25-3), connecting one end of a second first structure plate (26-3) with the inner side of the top of the second first structure outer wall (25-3), and connecting the other end of the second first structure plate (22-3) with the first layer of force transfer beam (21-3) through the temporary structure force transfer column (18);
step 903, dismantling a second support beam (8) of the first path;
step ten, constructing a second structure top plate: a second structure top plate outer wall supporting short column (24-4) is arranged at the top of the second snap pile (2), the exposed end of the second structure top plate outer wall supporting short column (24-4) is abutted against the outer side of the top of the second structure top plate outer wall (25-4), one end of the second structure top plate (26-4) is connected with the inner side of the top of the second structure top plate outer wall (25-4), and the other end of the second structure top plate (22-4) penetrates through the temporary structure force transfer column (18) to be connected with the structure top plate force transfer beam (21-4);
and eleventh, removing the steel pipe upright piles in the second foundation pit area layer by layer, and filling backfill (23) between the second occlusive pile (2) and the second outer wall.
2. The construction method for asynchronously excavating, staggering, dismantling and supporting the ultra-deep basement in a partitioned mode according to claim 1, is characterized in that: the occlusive pile located in the first foundation pit area in the plurality of occlusive piles is a first occlusive pile (1), the occlusive pile located in the second foundation pit area in the plurality of occlusive piles is a second occlusive pile (2), the steel pipe upright pile located in the first foundation pit area in the plurality of steel pipe upright piles is a first steel pipe upright pile (3), and the steel pipe upright pile located in the second foundation pit area in the plurality of steel pipe upright piles is a second steel pipe upright pile (4).
3. The construction method for asynchronously excavating, staggering, dismantling and supporting the ultra-deep basement in a partitioned mode according to claim 1, is characterized in that: one end, far away from the first supporting beam I (7), of the first supporting beam I (7) is connected with the first crown beam (5), and one end, far away from the first supporting beam I (7), of the first supporting beam II (8) is connected with the second crown beam (6);
one end of the first second supporting beam (11) far away from the second supporting beam (12) and one end of the first third supporting beam (13) far away from the second third supporting beam (14) are connected with the first occlusive pile (1) through the first waist beam (9), and one end of the second supporting beam (12) far away from the first second supporting beam (11) and one end of the second third supporting beam (14) far away from the first third supporting beam (13) are connected with the second occlusive pile (2) through the second waist beam (10).
4. The construction method for asynchronously excavating, staggering, dismantling and supporting the ultra-deep basement in a partitioned mode according to claim 1, is characterized in that: the first structure top plate outer wall supporting short column (19-4) is connected with the first snap pile (1) through a first crown beam (5); and the second structure top plate outer wall supporting short column (24-4) is connected with the second snap pile (2) through a second crown beam (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111560088.9A CN114032959B (en) | 2021-12-20 | 2021-12-20 | Staggered support disassembly construction method for ultra-deep basement partition asynchronous excavation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111560088.9A CN114032959B (en) | 2021-12-20 | 2021-12-20 | Staggered support disassembly construction method for ultra-deep basement partition asynchronous excavation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114032959A true CN114032959A (en) | 2022-02-11 |
| CN114032959B CN114032959B (en) | 2024-04-16 |
Family
ID=80140891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111560088.9A Active CN114032959B (en) | 2021-12-20 | 2021-12-20 | Staggered support disassembly construction method for ultra-deep basement partition asynchronous excavation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114032959B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100925023B1 (en) * | 2008-08-26 | 2009-11-04 | 주식회사 벤트코리아 | Construction method using pile head reinforcing apparatus for a temporary structure |
| CN105951843A (en) * | 2016-06-17 | 2016-09-21 | 中建八局第建设有限公司 | Construction method of deep foundation pit |
| CN111945743A (en) * | 2020-08-15 | 2020-11-17 | 中铁十一局集团第一工程有限公司 | Multi-layer unbalanced foundation pit supporting method suitable for staged excavation |
| CN112832252A (en) * | 2021-01-06 | 2021-05-25 | 深圳市工勘岩土集团有限公司 | Deep foundation pit supporting construction method with large height difference of two sides |
| CN113737857A (en) * | 2021-10-09 | 2021-12-03 | 中国建筑第二工程局有限公司 | Be used for deep pipe gallery structure and major structure to build connection structure again and worker's method thereof |
-
2021
- 2021-12-20 CN CN202111560088.9A patent/CN114032959B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100925023B1 (en) * | 2008-08-26 | 2009-11-04 | 주식회사 벤트코리아 | Construction method using pile head reinforcing apparatus for a temporary structure |
| CN105951843A (en) * | 2016-06-17 | 2016-09-21 | 中建八局第建设有限公司 | Construction method of deep foundation pit |
| CN111945743A (en) * | 2020-08-15 | 2020-11-17 | 中铁十一局集团第一工程有限公司 | Multi-layer unbalanced foundation pit supporting method suitable for staged excavation |
| CN112832252A (en) * | 2021-01-06 | 2021-05-25 | 深圳市工勘岩土集团有限公司 | Deep foundation pit supporting construction method with large height difference of two sides |
| CN113737857A (en) * | 2021-10-09 | 2021-12-03 | 中国建筑第二工程局有限公司 | Be used for deep pipe gallery structure and major structure to build connection structure again and worker's method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114032959B (en) | 2024-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106522241A (en) | Deep foundation pit supporting method of ultrahigh floor height type basement structure | |
| CN104032744B (en) | Support replacement construction method in the engineering of group hole | |
| CN111945743A (en) | Multi-layer unbalanced foundation pit supporting method suitable for staged excavation | |
| CN109610466B (en) | Unsynchronized construction method and structure of irregular deep foundation pits on two sides of built subway station | |
| CN110593269A (en) | Turnover type structure support changing system and construction method thereof | |
| CN114032959A (en) | Construction method for asynchronous excavation, staggered support removal and replacement of ultra-deep basement partition | |
| CN109403339B (en) | Deep foundation pit composite supporting structure combining double-row piles with center island method and supporting method thereof | |
| CN216515630U (en) | Construction system for dismantling, replacing and supporting ultra-deep basement in subareas | |
| CN102650133A (en) | Method and object for constructing half top-down deep base pit supporting structure of side frame | |
| CN112065467B (en) | Underground engineering supporting structure and construction method thereof | |
| CN216379638U (en) | Partition supporting beam demolishs biography power structure in deep basal pit | |
| CN109838239B (en) | Construction method for subway single-layer underground excavation station | |
| CN211285624U (en) | Can have enough to meet need formula structure and trade and prop system | |
| CN210104757U (en) | Double row pile internal stay supporting construction | |
| CN116025364A (en) | Large-section tunnel lining block construction supporting method | |
| CN203066083U (en) | Supporting structure for two adjacent foundation pits | |
| CN116180757A (en) | Deep foundation pit supporting system | |
| CN111962536A (en) | Round combined cofferdam of seasonal water area bridge rock-socketed foundation and construction method | |
| CN202925551U (en) | Foundation pit brace replacing and construction structure at irregular place of ramp | |
| CN111851541A (en) | Circular secant pile-single-wall steel combined cofferdam and construction method | |
| CN113356886B (en) | Construction method of low-bearing-capacity soft rock tunnel | |
| CN215801796U (en) | Super-wide overlapped construction structure of underpass type lake area section tunnel | |
| CN117868197A (en) | L-shaped half-cover excavation construction method suitable for subway station at crossroad | |
| CN215594059U (en) | Inverted frame superposed supporting system suitable for ultra-deep working well | |
| CN216042170U (en) | Stress-adjustable assembled concrete-filled steel tube column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |