CN115288189A - Construction method of pit-well type stereo garage - Google Patents
Construction method of pit-well type stereo garage Download PDFInfo
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- CN115288189A CN115288189A CN202210026241.8A CN202210026241A CN115288189A CN 115288189 A CN115288189 A CN 115288189A CN 202210026241 A CN202210026241 A CN 202210026241A CN 115288189 A CN115288189 A CN 115288189A
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- 238000010276 construction Methods 0.000 title claims abstract description 43
- 238000005192 partition Methods 0.000 claims abstract description 98
- 239000002689 soil Substances 0.000 claims abstract description 46
- 239000004568 cement Substances 0.000 claims abstract description 29
- 238000011065 in-situ storage Methods 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims abstract description 6
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 5
- 238000009412 basement excavation Methods 0.000 claims description 12
- 230000009977 dual effect Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000004567 concrete Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 2
- 235000020681 well water Nutrition 0.000 claims 1
- 239000002349 well water Substances 0.000 claims 1
- 238000007711 solidification Methods 0.000 abstract description 5
- 230000008023 solidification Effects 0.000 abstract description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 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
- 238000009417 prefabrication Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- 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
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- 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
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0283—Retaining or protecting walls characterised by constructional features of mixed type
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- 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
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H6/00—Buildings for parking cars, rolling-stock, aircraft, vessels or like vehicles, e.g. garages
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- Mining & Mineral Resources (AREA)
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Abstract
The invention relates to a deep pit well type stereo garage construction method, which comprises the steps of constructing a soil-retaining and water-retaining double composite cement soil wall, casting a reinforced concrete support column in situ, excavating earthwork to a set elevation, then putting a prefabricated inner partition wall, continuously excavating the earthwork to the set elevation, then prefabricating the inner partition wall below until the earthwork is excavated to a base elevation, and finishing the installation of the last prefabricated inner partition wall; and (4) finishing pouring of the lining wall from bottom to top, and finally finishing construction of the bottom plate of the pit. Prefabricated plates and prefabricated inner partition walls enable the whole construction process to adopt a factory prefabricated form, the site pouring of a construction site is reduced, the time for site pouring and solidification is saved, weather influence is avoided, the construction time is shortened, and the project progress is improved.
Description
Technical Field
The invention belongs to the field of pit construction, and particularly relates to a pit-well type stereo garage construction method.
Background
The increase of urban living population and the increase of urban buildings lead the land resource utilization of urban dense areas to be tense, so that more underground spaces are utilized, the excavation depth of foundation pits is deeper and deeper, the existing subway stations, a large number of municipal pipelines buried underground and structures close to the foundation pits of the city are provided, and the foundation pit supporting means of the part of areas mostly use a combined supporting form of an ultra-deep underground continuous wall and an inner support. However, with the development of the green and low-carbon concept, the underground continuous wall has some problems: 1. a large amount of slurry protecting walls are needed in the process of forming the groove, the waste gas and slurry are difficult to discharge, and a large environmental protection pressure is formed; 2. the site construction process is complex, and the construction time is long; 3. the wall forming construction process has certain disturbance on the adjacent foundation, and the longer the groove forming time is, the deeper the wall body is, the larger the wall thickness is, and the greater the difficulty of environmental protection is; the quality control of the underwater poured concrete is difficult, and the hidden trouble of seam water leakage is easily formed due to improper treatment.
Therefore, designers propose a structure of a cemented soil continuous wall to form a continuous waterproof wall. However, the cement-soil continuous wall has a weak capability of resisting lateral soil pressure, a continuous wall needs to be constructed on the inner side of the continuous waterproof wall to serve as a retaining wall, a lining wall is constructed on the inner side of the continuous wall, and an inner partition wall is manufactured in a pit to support the continuous wall. Meanwhile, a gap is reserved between the continuous wall on the inner side of the waterproof wall and the waterproof wall, so that the waterproof wall is lack of sufficient transverse support, cannot bear lateral soil pressure, and is inclined and cracked, and the waterproof effect of the waterproof wall is reduced. The inner side of the continuous wall is also provided with a lining wall and an inner partition wall to play a role of transverse support, so that the whole construction process is prolonged.
Disclosure of Invention
The invention provides a construction method of a pit-well type stereo garage, which comprises the steps of firstly manufacturing a soil-blocking and water-retaining dual composite cement soil wall before an earth excavation, then casting an integrated supporting column on the inner side of the cement soil wall in a cast-in-place mode, and then conducting construction from top to bottom in an alternating mode of excavating the earth and installing a prefabricated inner partition wall until reaching a pit base, wherein the soil-blocking and water-blocking dual composite cement soil wall, the cast-in-place integrated supporting column and the prefabricated inner partition wall are installed, so that the whole construction process mostly adopts a factory prefabrication mode, the site pouring is reduced, the time of site pouring and solidification is saved, the weather influence is avoided, the construction time is shortened, and the project progress is improved.
The specific technical scheme of the invention is as follows: a pit-well type stereo garage construction method comprises the following steps: firstly, constructing a soil-blocking and water-retaining dual composite cement soil wall, namely milling a groove by using a groove milling machine, inserting a prefabricated plate into the groove, wherein the prefabricated plate is divided into a prefabricated cross wall plate corresponding to a corner part of a deep pit, a prefabricated wall plate corresponding to an edge of the deep pit and a prefabricated connecting plate fastened by using a mortise, and the width of the prefabricated wall plate is adapted to the width of the interval between inner partition walls in the deep pit;
secondly, casting a reinforced concrete support column on the inner side of the cement-soil wall in situ, wherein one side of the support column is attached to the inner side of the cement-soil wall, and the support column extends to the bottom of the pit;
thirdly, excavating earth to a set elevation, then placing a prefabricated inner partition wall, butting the end part of the prefabricated inner partition wall with the surface of a corresponding supporting column, and then grouting to a position between the supporting column and the end part of the prefabricated inner partition wall to form a cast-in-situ tenon column;
fourthly, continuously excavating the earth to a set elevation, then prefabricating an inner partition wall below to enable the end part of the prefabricated inner partition wall to be in butt joint with the surface of a corresponding supporting column, aligning the upper prefabricated inner partition wall and the lower prefabricated inner partition wall to be on the same vertical plane, then grouting the position between the supporting column and the end part of the prefabricated inner partition wall to form a cast-in-situ tenon column, and grouting through a grouting pipe of the prefabricated inner partition wall to fill the position between the upper prefabricated inner partition wall and the lower prefabricated inner partition wall;
fifthly, repeating the fourth step until the earthwork is excavated to the elevation of the substrate, and finishing the installation of the last prefabricated inner partition wall;
and sixthly, pouring the lining wall from bottom to top, manufacturing the lining wall in blocks, connecting the lining wall with the support columns at intervals, attaching the lining wall to the inner side surface of the cement-soil wall, and finally completing pit bottom plate construction.
The prefabricated panels are arranged in the cement soil wall, so that a soil-blocking and water-retaining double composite cement soil wall structure is formed, the cement soil wall structure has a water-blocking effect and a soil-retaining effect, the width of each prefabricated panel is large and is adaptive to the distance between the inner partition walls in the pit, so that the cement soil wall can bear large lateral soil pressure, the structure and the construction requirements of the soil-blocking support in the pit can be simplified, the prefabricated inner partition walls are placed for transverse support after the support columns are cast in place, the time for waiting cast-in-place solidification is shortened, the construction progress of the whole project is accelerated, after earthwork is excavated, the inner lining walls are cast in place on the inner sides of the cement soil wall and are connected with the support columns, construction can be carried out in sections, and the inner lining walls can play a role of auxiliary support for the cement soil wall; prefabricated plate, prefabricated interior partition wall make whole work progress adopt the prefabricated form of mill more, reduce the building site cast in situ, save cast in situ and the time that solidifies, avoid receiving the weather influence, shorten the engineering time, improve the engineering progress.
Further preferably, before earth excavation, dewatering and draining are carried out, a pipe well dewatering mode is adopted, the diameter of a drilled hole of the pipe well is controlled to be 800mm, the well pipe is a corrugated pipe, and round holes are uniformly distributed in the outer wall of the corrugated pipe along the length direction of the pipe.
Preferably, before the support column is cast in place, the pipe hole is manufactured, the steel reinforcement cage is arranged in the pipe hole, three side surfaces outside the steel reinforcement cage are coated with the concrete template, and one side surface is attached to the inner side surface of the cement wall.
Further preferably, the underground excavation of the earth adopts a mode of synchronous block excavation and layered excavation of each block, the thickness of each layer is not more than 1.5m, and the excavation width of each section is not more than 20m.
Preferably, when the inner partition wall is prefabricated below, the prefabricated inner partition wall is moved to the position below the prefabricated inner partition wall above in a translation mode from the side lower part of the prefabricated inner partition wall installed above, and a tenon column is poured between two ends of the prefabricated inner partition wall to connect the prefabricated inner partition wall and the supporting column.
Preferably, the inner lining wall is divided into a plane shape and a groove shape, the plane-shaped inner lining wall is positioned at the position vertical to the inner partition wall at the side of the deep pit, and two sides of the plane-shaped inner lining wall are connected with the supporting columns; the groove-shaped lining wall is positioned at the position of the short edge of the pit, two ends of the groove-shaped lining wall are connected with the adjacent support columns, and the groove-shaped lining wall is attached to the inner side face of the cement soil wall at the short edge of the pit and is overlapped with the cement soil wall at the corner of the pit.
Preferably, the prefabricated panels are vertically inserted from top to bottom, the prefabricated cross wall boards are inserted under the corners of the deep pits, the prefabricated connecting plates are vertically inserted, the prefabricated connecting plates are fastened with the mortises of the prefabricated cross wall boards, the prefabricated wall boards and the prefabricated connecting plates are inserted from two sides to the middle, and the prefabricated wall boards are fastened with the mortises of the prefabricated connecting plates.
Further preferably, the vertical stile on two adjacent limits of prefabricated cross wallboard adopts the tenon structure, and the vertical stile in both sides of prefabricated wallboard adopts the tenon structure, and the both sides position of the root of tenon sets up the bayonet socket, and the two vertical stiles of prefabricated connecting plate adopt with tenon structure matched with C-slot, and the notch in C-slot extends to the centre and forms the buckle limit, buckle limit and bayonet socket to the cooperation.
Further preferably, the length of the prefabricated connecting plate is larger than that of the prefabricated wall plate, the length of the prefabricated connecting plate is larger than that of the prefabricated cross wall plate, the lower side surface of the prefabricated wall plate is provided with protruding pins, the upper side surface of the prefabricated wall plate is provided with concave slots, the lower side surface of the prefabricated cross wall plate is provided with protruding pins, the upper side surface of the prefabricated cross wall plate is provided with concave slots, the shapes of the pins are matched with those of the slots, and the positions of the pins and the positions of the slots are in one-to-one vertical correspondence.
Preferably, the three side surfaces of the support column are provided with grooves along the length direction, the end part of the prefabricated inner partition wall is provided with a groove, when the end part of the prefabricated inner partition wall is connected with the surface of the support column, the two grooves form a matched column hole, and the tenon column is formed by grouting in the matched column hole.
The invention has the beneficial effects that: the precast slabs and the precast inner partition walls enable the whole construction process to be mostly in a factory precast mode, so that the site pouring in the construction site is reduced, the time for the site pouring and solidification is saved, the weather influence is avoided, the construction time is shortened, and the project progress is improved; the prefabricated plate is put into in the soil cement wall, thereby form the dual compound soil cement wall structure of retaining wall and manger plate, except having the manger plate effect, still have the effect of retaining soil concurrently, and the width of prefabricated wallboard is great, suit with the distance between the interior partition wall of pit, this just makes the soil cement wall can bear great side direction soil pressure, thereby can simplify the structure and the construction requirement that the interior partition wall of pit supported, transfer the prefabricated interior partition wall behind the cast-in-place support column and carry out horizontal support, shorten the time of waiting for cast-in-place solidification, thereby accelerate the construction progress of whole engineering.
Drawings
FIG. 1 is a schematic diagram of a deep pit structure according to the present invention;
FIG. 2 is a schematic view of a tongue-and-groove fastening structure of a prefabricated slab according to the present invention;
FIG. 3 is a schematic view of a support post structure according to the present invention;
FIG. 4 is a schematic view illustrating the connection of a prefabricated interior partition wall according to the present invention;
FIG. 5 is a schematic view illustrating the construction of the cement wall according to the present invention;
FIG. 6 is a schematic view of the construction of the support post of the present invention;
FIG. 7 is a schematic view of the present invention illustrating the installation of a prefabricated internal partition in an earth moving installation;
FIG. 8 is a schematic representation of the present invention after construction of the pit floor;
in the figure: 1. cement soil wall, 2 prefabricated wall board, 3 prefabricated connecting board, 4 support column, 5 planar interior lining wall, 6 prefabricated cross wall board, 7 groove-shaped interior lining wall, 8 prefabricated internal partition wall, 9 slot, 10 tenon, 11C-shaped groove, 12 plug pin, 13 groove, 14 reinforcing steel bar, 15 pipe well, 16 bottom board.
Detailed Description
The invention is further described by the following specific embodiments in conjunction with the accompanying drawings.
Example (b):
as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the deep pit type stereo garage comprises a soil-retaining and water-retaining dual composite cement-soil wall 1 structure with built-in precast slabs, integrated support columns 4 cast on the inner sides of the cement-soil walls in situ, and precast internal partition walls 8 transversely connected between the opposite support columns, wherein lining walls are cast on the inner sides of the cement-soil walls in an attached manner.
The whole pit is rectangular, four sides and four corners, the positions of the sides are planar, and a cross structure is formed at the positions of the corners. As shown in figure 2, the cement-soil wall is connected with the prefabricated connecting plates 3 in a mortise fastening mode by adopting the prefabricated wall panels 2 at the positions corresponding to the edges, the prefabricated cross wall panels 6 and the prefabricated connecting plates 3 are connected in a mortise fastening mode by adopting the positions corresponding to the corners, and the prefabricated connecting plates are connected with the prefabricated wall panels. The length of prefabricated wallboard is identical with the distance between the prefabricated interior partition wall, and the position of prefabricated connecting plate corresponds with the position of interior partition wall, and the height of prefabricated connecting plate is greater than the height of prefabricated wallboard. Prefabricated wallboard 2 is plane, and 6 transversal personally submitting crosses of prefabricated cross wallboard, and the vertical stile in both sides of prefabricated wallboard adopts tenon 10 structure, and two adjacent vertical stiles of prefabricated cross wallboard adopt the tenon structure. The vertical terminal surface of tenon has the rake and makes the width of the both sides face of tenon different, promptly, the width of the side towards in the pit is less than the width of the side of opposite side, and the both sides position of the root of tenon sets up the bayonet socket. The two vertical edges of the prefabricated connecting plate adopt C-shaped grooves 11 matched with the tenon structures, the notches of the C-shaped grooves extend towards the middle to form buckling edges, the buckling edges are matched with the bayonets, and the bayonets can prevent the C-shaped grooves from transversely separating. The middle of the prefabricated connecting plate is an inner plate, and two side faces of the inner plate are in a shape matched with the vertical end face of the tenon. The tenon extends along the vertical stile of prefabricated plate, and the C-shaped groove is along the vertical stile of prefabricated connecting plate, and the prefabricated plate is also placed according to vertical mode when placing, and C-shaped groove and tenon can be connected to the prefabricated connecting plate in vertical male mode. The height of the prefabricated wall boards and the height of the prefabricated cross wall boards are 2.7-3m, the height of the prefabricated wall boards generally corresponds to the height of one layer of a pit building, and the height of the prefabricated connecting boards is larger than that of the prefabricated wall boards, so that the prefabricated connecting boards can be used for connecting at least two prefabricated wall boards. The thickness of tenon is less than the thickness of prefabricated wall plate, and after prefabricated connecting plate and prefabricated wallboard pegged graft, the outside surface parallel and level of prefabricated plate, the inboard surface parallel and level of prefabricated plate also make the soil cement layer of prefabricated plate outward appearance have sufficient thickness like this. The prefabricated wall board is of a stacked inserting structure from top to bottom, protruding plug pins 12 are arranged on the lower side surface of the prefabricated wall board, concave inserting grooves 9 are formed in the upper side surface of the prefabricated wall board, the shapes of the plug pins are matched with those of the inserting grooves, and the positions of the plug pins and the positions of the inserting grooves are in one-to-one vertical correspondence. The lower side surface of the prefabricated cross wallboard is provided with protruding pins, the upper side surface of the prefabricated cross wallboard is provided with concave slots, the shapes of the pins are matched with those of the slots, and the positions of the pins and the slots are in one-to-one vertical correspondence. When placing, the prefabricated cross wallboard is inserted into the slot when placing, and the stable grafting structure is established to prefabricated plate from top to bottom. The cross section of the pin is divided into two parts, including a rectangular part and a trapezoidal part, and the length of the short side of the trapezoidal part is equal to that of the rectangular part. The inclined plane of trapezoidal portion is equivalent to the guide structure of participating in, can guide to participate in smoothly with the slot cooperation.
As shown in fig. 3, the supporting column is square, the width of the supporting column is larger than that of the prefabricated connecting plate, one side surface of the supporting column is a plane, the plane is fixedly connected with the inner side surface of the cement soil wall, and trapezoidal grooves 13 are formed in the other three side surfaces. Reinforcing steel bars 14 extend out of the groove bottom in the groove in the surface of the supporting column, the length of the reinforcing steel bars is smaller than the depth of the groove, the reinforcing steel bars extend out of the groove bottom in the groove at the end part of the prefabricated inner partition wall, and the length of the reinforcing steel bars is smaller than the depth of the groove. The end part of the prefabricated inner partition wall is provided with a vertical groove, when the end part of the prefabricated inner partition wall is connected with the surface of the support pillar, the two grooves form a matched pillar hole, and a cast-in-situ tenon pillar is formed by grouting in the matched pillar hole.
As shown in fig. 4, grouting pipes are pre-buried in the prefabricated inner partition walls, inward-concave filling grooves extending along the length of the prefabricated inner partition walls are formed in the upper side and the lower side of the prefabricated inner partition walls, the filling grooves are communicated with the grouting pipes, opposite filling grooves of the upper prefabricated inner partition walls and the lower prefabricated inner partition walls are abutted, and connecting beams of the upper prefabricated inner partition walls and the lower prefabricated inner partition walls are formed in the filling grooves after grouting. The prefabricated interior partition wall is internally provided with connecting screwed pipes used for connecting a lifting hook, screw openings of the connecting screwed pipes face the side face of the prefabricated interior partition wall, the number of the connecting screwed pipes is at least four, the screw openings are averagely distributed on the two side faces of the prefabricated interior partition wall, and the end parts of the connecting screwed pipes are flush with the side face of the prefabricated interior partition wall. Considering the convenience of the cast-in-place of the support column, the end part of the prefabricated inner partition wall is provided with a notch which is just communicated with the groove at the end part of the prefabricated inner partition wall, and the opening of the involutory column can be grouted inwards.
The lining wall is divided into a planar lining wall 5 and a groove-shaped lining wall 7, the planar lining wall is positioned at the position of the vertical inner partition wall at the side of the deep pit, two sides of the planar lining wall are connected with the support columns, the groove-shaped lining wall is positioned at the position of the short side of the deep pit, two ends of the groove-shaped lining wall are connected with the adjacent support columns, and the groove-shaped lining wall is attached to the inner side face of the cement soil wall at the short side of the deep pit and is overlapped with the cement soil wall at the corner of the deep pit.
As shown in fig. 5 to 8, a construction method of a pit-well type stereo garage includes the following steps:
firstly, constructing a soil-blocking and water-blocking dual composite cement soil wall, milling a groove by using a groove milling machine, inserting a prefabricated plate into the groove, vertically inserting the prefabricated plate from top to bottom, inserting a prefabricated cross wall plate under a deep-pit corner position, vertically inserting a prefabricated connecting plate, buckling the prefabricated connecting plate and the prefabricated cross wall plate tongue-and-groove, inserting the prefabricated wall plate and the prefabricated connecting plate from two sides to the middle, and buckling the prefabricated wall plate and the prefabricated connecting plate tongue-and-groove;
secondly, manufacturing a dewatering pipe well 15, controlling the diameter of a drilled hole of the pipe well to be 800mm, uniformly distributing round holes on the outer wall of the corrugated pipe along the length direction of the pipe, controlling the dewatering depth to be 500-1000mm below an excavated surface, arranging a water level observation hole, carrying out controlled dewatering outside a pit, and enabling the dewatering depth to be not lower than 6.0m below the bottom surface, and embedding the pipe well by using a slurry retaining wall;
thirdly, casting reinforced concrete support columns on the inner side of the cement-soil wall in situ, manufacturing pipe holes, placing reinforcement cages into the pipe holes, coating concrete templates on three outer side surfaces of the reinforcement cages, attaching one side surface of each support column to the inner side surface of the cement-soil wall, and enabling the support columns to penetrate into the bottom of the pit;
fourthly, excavating earthwork in a mode of synchronous block division and layered block division, wherein the earthwork is synchronously excavated in five blocks, the thickness of each layer is not more than 1.5m, and the excavation width of each section is not more than 20m;
fifthly, excavating earth to a set elevation, then placing the prefabricated internal partition wall, butting the end part of the prefabricated internal partition wall with the surface of the corresponding support pillar, and grouting the position between the support pillar and the end part of the prefabricated internal partition wall to form a cast-in-situ tenon pillar;
sixthly, continuing to excavate the earth to a set elevation, then prefabricating an inner partition wall below the earth, enabling the end part of the prefabricated inner partition wall to be in butt joint with the surface of a corresponding supporting column, aligning the upper prefabricated inner partition wall and the lower prefabricated inner partition wall to be on the same vertical plane, then grouting the position between the supporting column and the end part of the prefabricated inner partition wall to form a cast-in-situ tenon column, and grouting through a grouting pipe of the prefabricated inner partition wall to fill the position between the upper prefabricated inner partition wall and the lower prefabricated inner partition wall;
seventhly, repeating the sixth step until the earth is excavated to the elevation of the substrate, and finishing the installation of the last prefabricated inner partition wall;
and eighthly, pouring the lining wall from bottom to top, manufacturing the lining wall in blocks, connecting the lining wall with the support columns at intervals, attaching the lining wall to the inner side surface of the cement-soil wall, and finally completing pit bottom plate construction.
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, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
The invention relates to a deep pit well type stereo garage construction method, which comprises the steps of constructing a soil-retaining and water-retaining double composite cement soil wall, casting a reinforced concrete support column in situ, excavating earthwork to a set elevation, then putting a prefabricated inner partition wall, continuously excavating the earthwork to the set elevation, then prefabricating the inner partition wall below until the earthwork is excavated to a base elevation, and finishing the installation of the last prefabricated inner partition wall; and (4) finishing pouring of the lining wall from bottom to top, and finally finishing construction of the bottom plate of the pit. Prefabricated plate, prefabricated interior partition wall make whole work progress adopt the prefabricated form of mill more, reduce the building site cast in situ, save cast in situ and the time that solidifies, avoid receiving the weather influence, shorten the engineering time, improve the engineering progress.
Claims (10)
1. A construction method of a pit-well type stereo garage is characterized by comprising the following steps: firstly, constructing a soil-retaining and water-retaining dual composite cement soil wall, namely milling a groove by using a groove milling machine, inserting a prefabricated plate into the groove, wherein the prefabricated plate is divided into a prefabricated cross wall plate corresponding to a corner part of a deep pit, a prefabricated wall plate corresponding to an edge of the deep pit and a prefabricated connecting plate fastened by using a mortise, and the width of the prefabricated wall plate is adapted to the width of the interval of an inner partition wall in the deep pit;
secondly, casting a reinforced concrete support column on the inner side of the cement-soil wall in situ, wherein one side of the support column is attached to the inner side of the cement-soil wall, and the support column extends to the bottom of the pit;
thirdly, excavating earth to a set elevation, then placing a prefabricated inner partition wall, butting the end part of the prefabricated inner partition wall with the surface of a corresponding supporting column, and then grouting to a position between the supporting column and the end part of the prefabricated inner partition wall to form a cast-in-situ tenon column;
fourthly, continuing to excavate the earth to a set elevation, then prefabricating an inner partition wall below to enable the end part of the prefabricated inner partition wall to be in butt joint with the surface of a corresponding supporting column, aligning the upper prefabricated inner partition wall and the lower prefabricated inner partition wall to be on the same vertical plane, then grouting the position between the supporting column and the end part of the prefabricated inner partition wall to form a cast-in-situ tenon column, and grouting through a grouting pipe of the prefabricated inner partition wall to fill the position between the upper prefabricated inner partition wall and the lower prefabricated inner partition wall;
fifthly, repeating the fourth step until the earthwork is excavated to the elevation of the substrate, and finishing the installation of the last prefabricated inner partition wall;
and sixthly, pouring the lining wall from bottom to top, manufacturing the lining wall in blocks, connecting the lining wall with the support columns at intervals, attaching the lining wall to the inner side surface of the cement-soil wall, and finally completing pit bottom plate construction.
2. The construction method of the pit-well type stereo garage of claim 1, wherein water is drained before earth excavation, a pipe well water drainage mode is adopted, the diameter of a drilled hole of the pipe well is controlled to be 800mm, a corrugated pipe is adopted as a well pipe, and round holes are uniformly distributed on the outer wall of the corrugated pipe along the length direction of the pipe.
3. The construction method of the pit-well type stereo garage of claim 1, wherein before the support pillar is cast in place, the pipe hole is manufactured, the steel reinforcement cage is arranged in the pipe hole, three sides of the exterior of the steel reinforcement cage are coated with the concrete template, and one side is attached to the inner side of the cement wall.
4. The method for constructing the pit-well type stereo garage of claim 1, 2 or 3, wherein the underground excavation is performed in a manner of synchronous block excavation and layered excavation, the thickness of each layer is not more than 1.5m, and the width of each section is not more than 20m.
5. The pit-well type stereo garage construction method according to claim 1, wherein when the prefabricated inner partition wall is prefabricated at the lower part, the prefabricated inner partition wall is moved to the lower part of the prefabricated inner partition wall at the upper part in a translation mode from the side part and the lower part of the prefabricated inner partition wall which is already installed at the upper part, and grouting is performed between two ends of the prefabricated inner partition wall to form a tenon column to connect the prefabricated inner partition wall and the support column.
6. The construction method of the pit-well type stereo garage of claim 1, wherein the inner lining wall is divided into a plane shape and a groove shape, the plane shape inner lining wall is positioned at a position vertical to the inner partition wall at the side of the pit, and two sides of the plane shape inner lining wall are connected with the supporting columns; the groove-shaped lining wall is positioned at the position of the short edge of the pit, two ends of the groove-shaped lining wall are connected with the adjacent support columns, and the groove-shaped lining wall is attached to the inner side face of the cement soil wall at the short edge of the pit and is overlapped with the cement soil wall at the corner of the pit.
7. The pit-well type stereo garage construction method according to claim 1, 2 or 3, wherein the prefabricated panels are vertically spliced from top to bottom, the prefabricated cross wall panels are inserted under the corners of the pit, the prefabricated connecting plates are vertically inserted, the prefabricated connecting plates are fastened with the mortises of the prefabricated cross wall panels, the prefabricated wall panels and the prefabricated connecting plates are inserted from two sides to the middle, and the prefabricated wall panels are fastened with the mortises of the prefabricated connecting plates.
8. The construction method of the pit-well type stereo garage of claim 1, 2, 3, 5 or 6, wherein the vertical edges of two adjacent edges of the prefabricated cross wall panel adopt a tenon structure, the vertical edges of two sides of the prefabricated wall panel adopt a tenon structure, bayonets are arranged at two sides of the root of the tenon, the two vertical edges of the prefabricated connecting plate adopt C-shaped grooves matched with the tenon structures, the notches of the C-shaped grooves extend towards the middle to form buckling edges, and the buckling edges are matched with the bayonets.
9. The method as claimed in claim 8, wherein the prefabricated connecting plate is longer than the prefabricated wall plate, the prefabricated connecting plate is longer than the prefabricated cross wall plate, the lower surface of the prefabricated wall plate is provided with protruding pins, the upper surface of the prefabricated wall plate is provided with concave slots, the lower surface of the prefabricated cross wall plate is provided with protruding pins, the upper surface of the prefabricated cross wall plate is provided with concave slots, the pins are matched with the slots in shape, and the pins and the slots are vertically in one-to-one correspondence.
10. The construction method of the pit-well type stereo garage of claim 1, 2, 3, 5 or 6, wherein grooves are formed on three sides of the supporting column along the length direction, grooves are formed on the end portions of the prefabricated internal partition walls, when the end portions of the prefabricated internal partition walls are connected with the surface of the supporting column, the two grooves form opposite column holes, and the tenon columns are formed by grouting in the opposite column holes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210026241.8A CN115288189A (en) | 2022-01-11 | 2022-01-11 | Construction method of pit-well type stereo garage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210026241.8A CN115288189A (en) | 2022-01-11 | 2022-01-11 | Construction method of pit-well type stereo garage |
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| GB559489A (en) * | 1942-08-21 | 1944-02-22 | Orlit Ltd | Improvements in concrete building structures |
| KR20020041539A (en) * | 2000-11-28 | 2002-06-03 | 유인균 | Composition of precast concrete debonding wall and precast concrete column for outdoor to sustain external force |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB559489A (en) * | 1942-08-21 | 1944-02-22 | Orlit Ltd | Improvements in concrete building structures |
| KR20020041539A (en) * | 2000-11-28 | 2002-06-03 | 유인균 | Composition of precast concrete debonding wall and precast concrete column for outdoor to sustain external force |
| KR20130081971A (en) * | 2012-01-10 | 2013-07-18 | 백인우 | Precast concrete wall and method for constructing underground permanent wall using the precast concrete wall |
| CN210658374U (en) * | 2019-05-28 | 2020-06-02 | 安徽省公路桥梁工程有限公司 | Foundation pit enclosure support system |
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