CN114718106A - Construction method for crossing subway line - Google Patents
Construction method for crossing subway line Download PDFInfo
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- CN114718106A CN114718106A CN202210566224.3A CN202210566224A CN114718106A CN 114718106 A CN114718106 A CN 114718106A CN 202210566224 A CN202210566224 A CN 202210566224A CN 114718106 A CN114718106 A CN 114718106A
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 230000002787 reinforcement Effects 0.000 claims description 90
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- 238000004519 manufacturing process Methods 0.000 claims description 33
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 13
- 239000011449 brick Substances 0.000 claims description 12
- 210000003205 muscle Anatomy 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 239000011469 building brick Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000009435 building construction Methods 0.000 claims 5
- 238000013461 design Methods 0.000 abstract description 9
- 108010068370 Glutens Proteins 0.000 description 8
- 235000021312 gluten Nutrition 0.000 description 8
- 239000002689 soil Substances 0.000 description 6
- 239000010438 granite Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 210000002219 extraembryonic membrane Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock 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
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/16—Foundations formed of separate piles
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Abstract
The invention discloses a construction method for crossing a subway line, which comprises the following steps: arranging a frame pillar in the foundation; constructing a pile cap on the frame pillar, wherein the pile cap is used for bearing the load of a building; and constructing a frame ground beam on the top of the foundation, wherein part of the pile cap is connected through the frame ground beam. The invention adopts a foundation design form of 'frame support piles + frame support ground beams', frame support columns are arranged after holes of the frame support columns are vertically dug in a foundation, pile bearing platforms are built on the foundation at the positions corresponding to the frame support columns, and the frame support ground beams are built on the foundation, wherein the pile bearing platforms are used for sharing the load of a building.
Description
Technical Field
The invention relates to the field of underground space buildings, in particular to a construction method for crossing a subway line.
Background
With the rapid development of urban rail transit in China, the subway line penetrates through the urban center more and more, and the problem of the vertical crossing between the subway tunnel and other buildings in the city is more and more prominent in the construction and operation stage.
At present, most of domestic research focuses on the structural safety of a building close to a constructed subway or a building which is only in a subway control area and does not cross a subway line when the construction of a new project is performed, and relatively few researches on the design and construction of a building foundation which is not constructed in the subway planning control area and cross the subway line are performed. The problems of insufficient predictability and high construction cost in the later period exist.
Therefore, a need exists for a method for solving the problems of building foundation design and construction in the subway planning control area range.
Disclosure of Invention
The invention mainly aims to provide a construction method for crossing subway lines, and aims to solve the problems of building foundation design and construction in the subway planning control area range.
In order to achieve the purpose, the invention provides a construction method for crossing a subway line, which comprises the following steps:
arranging a frame pillar in the foundation;
constructing a pile cap on the frame pillar, wherein the pile cap is used for bearing the load of a building;
and constructing a frame ground beam on the top of the foundation, wherein part of the pile cap is connected through the frame ground beam.
Preferably, the step of providing a frame post within the foundation includes:
digging a hole in a rotary mode, wherein the hole is dug in the foundation in a rotary mode along the vertical direction of the foundation;
manufacturing a frame pillar reinforcement cage, and splicing the manufactured frame pillar reinforcement cage along the axis direction of the frame pillar reinforcement cage to form a frame pillar support;
and pouring concrete, putting the frame strut support into the hole, and pouring concrete into the frame strut support to form the frame strut.
Preferably, the step of rotating the hole comprises:
detecting geological information of a foundation, and designing the size of a hole according to the geological information;
and rotary excavating the hole according to the size of the hole.
Preferably, the step of manufacturing the frame pillar reinforcement cage comprises:
manufacturing longitudinal bars, and connecting the reinforcing steel bars along the axis direction of the reinforcing steel bars to form the longitudinal bars;
manufacturing frame pillar outer ring main ribs, wherein a plurality of longitudinal ribs are arranged along the circumferential direction to form the frame pillar outer ring main ribs;
arranging inner stirrups along the circumferential direction of the main reinforcements on the outer ring of the frame strut, wherein a plurality of inner stirrups are arranged inside the main reinforcements on the outer ring of the frame strut at intervals along the axial direction of the main reinforcements on the outer ring of the frame strut, and the inner stirrups are in an open state at the moment;
arranging inner ring main ribs, wherein a plurality of longitudinal ribs are arranged as inner ring main ribs of the frame strut, the inner ring main ribs of the frame strut are annularly arranged inside the inner stirrups, and the inner ring main ribs of the frame strut are welded with the inner stirrups;
and arranging outer stirrups, and arranging the outer stirrups in the circumferential direction of the main reinforcements of the outer ring of the frame strut, wherein the outer stirrups are welded with the main reinforcements of the outer ring of the frame strut.
Preferably, the step of constructing a pile cap on the frame post comprises:
constructing a pile cap main body, excavating earthwork around the frame support on a foundation to form an accommodating space, placing the steel bar support into the accommodating space, pouring concrete into the accommodating space, and constructing the pile cap main body;
backfilling earthwork, namely backfilling earthwork around the pile cap in the foundation, and leveling the backfilled earthwork to form a plane;
manufacturing a pile cap steel bar support on the foundation;
and forming a pile cap, pouring concrete on a plane formed after backfilling earth in the foundation, wherein the plane surrounds the pile cap main body to form the pile cap.
Preferably, the step of constructing the pile cap body includes:
excavating a pile cap foundation pit, and excavating the pile cap foundation pit around the frame strut on the foundation;
manufacturing a cushion layer of the bearing platform, leveling the bottom ground of the foundation pit of the pile bearing platform, and pouring concrete into the bottom ground of the foundation pit of the pile bearing platform to form the cushion layer of the bearing platform;
manufacturing a brick bed course, and manufacturing a brick bed course on the cushion layer of the bearing platform by building bricks around the frame pillar;
embedding a steel bar support, placing the steel bar support in the pile cap foundation pit, pouring concrete into the pile cap foundation pit, and embedding the steel bar support;
and forming a pile cap main body, and pouring concrete into the brick moulding bed to form the pile cap main body.
Preferably, the step of constructing a frame ground beam on top of the foundation includes:
excavating earthwork, namely excavating earthwork on the foundation to form a containing groove for containing the frame supporting ground beam;
manufacturing a frame-supporting ground beam reinforcement cage, binding and connecting reinforcement bars to form the frame-supporting ground beam reinforcement cage, and binding and connecting a plurality of frame-supporting ground beam reinforcement cages to form a reinforcement cage of the frame-supporting ground beam;
placing the frame support ground beam reinforcement cage into the accommodating groove excavated on the foundation;
and forming a frame support ground beam, and pouring concrete into the accommodating groove.
Preferably, the step of manufacturing the steel reinforcement cage of the frame-supported ground beam comprises the following steps:
manufacturing longitudinal bars, and connecting the reinforcing steel bars along the axis direction of the reinforcing steel bars to form the longitudinal bars;
manufacturing frame support ground beam main ribs, wherein a plurality of longitudinal ribs are arranged along the circumferential direction to form the frame support ground beam main ribs;
arranging frame support ground beam outer stirrups along the circumferential direction of the frame support ground beam main reinforcements, so that the frame support ground beam main reinforcements are sleeved inside the frame support ground beam outer stirrups;
and finishing the binding of the steel reinforcement cage of the frame-supported ground beam.
Preferably, the pile cap has a pile cap rebar bracket; the frame props up the ground roof beam and has frame props up ground roof beam owner muscle and frame and props up ground roof beam outer stirrup, frame props up ground roof beam outer stirrup and follows the circumference setting of frame props up ground roof beam owner muscle makes the frame prop up the reinforcing bar of ground roof beam and forms framework of steel reinforcement, pile cap with frame props up ground roof beam and passes through pile cap steel support with framework of steel reinforcement connects.
Preferably, the foundation comprises a first working area and a second working area, a bottom plate is arranged in the first working area, the bottom plate is connected with the pile cap and the frame ground supporting beam, and the bottom plate is used for bearing the load of the earth surface building; and the second operation area is matched with the frame support post and the frame support ground beam to bear the load of the earth surface building.
The invention adopts a basic design form of 'frame support piles + frame support ground beams', frame support columns are arranged after holes of the frame support columns are vertically dug out in a foundation, pile bearing platforms are built on the foundation at positions corresponding to the frame support columns, and the frame support ground beams are built on the foundation, wherein the pile bearing platforms are used for sharing the load of a building; according to the invention, the stress problem of the building is solved by connecting the frame support columns and the frame support ground beams, the problem of reserving a sufficient safe space for later subway tunnel construction and operation is solved, and the problem of adverse influence on the building foundation caused by later subway tunnel construction and operation is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a construction method for crossing a subway line according to the present embodiment;
fig. 2 is a schematic flow chart of setting a frame pillar in a foundation according to this embodiment;
fig. 3 is a schematic flow chart of the rotary drilling of the hole according to this embodiment;
fig. 4 is a schematic view of a process of making a steel reinforcement cage with frame struts and splicing the steel reinforcement cage with frame struts according to this embodiment;
fig. 5 is a schematic structural view in a vertical direction of the construction method for a subway-crossing building according to the present embodiment;
fig. 6 is a schematic top view of the construction method for a subway-crossing building according to the present embodiment;
fig. 7 is a schematic cross-sectional view of a steel reinforcement cage with frame pillars according to the present embodiment;
fig. 8 is a schematic cross-sectional view of the pile cap body according to the present embodiment.
The reference numbers illustrate:
10. a foundation; 100. a frame support; 200. a pile cap; 300. a frame supports a ground beam; 400. a structural column; 500. a tunnel; 600. a first operation area; 700. a second operation area; 110. frame pillar outer lane main reinforcement; 111. longitudinal ribs; 120. an outer stirrup; 130. frame pillar inner circle main reinforcement; 140. an inner stirrup; 800. a cushion layer of the bearing platform; 900. brick moulding bed.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, a first embodiment of the present invention provides a construction method for a cross-subway line, including the steps of:
step S100, arranging a frame pillar in a foundation;
specifically, in this embodiment, the foundation is a soil layer and/or a rock stratum in a construction area where a building is expected to be constructed, in the present invention, a subway or other underground space is expected to be constructed in the construction area, the frame pillars are disposed on both sides of a subway tunnel protection line provided along a third party of subway design, two rows of subway tunnel-spanning pile foundations are disposed along both sides of the tunnel protection line, a clear distance between the pile foundation and a tunnel edge on a plane is 3 meters, the horizontal influence distance of the subway tunnel is 3 meters, a pile span is about 14.5 meters, absolute elevation of a rotary excavating cast-in-place pile end bottom on both sides of the tunnel protection line should be lower than 6 meters of the subway tunnel bottom, and should enter a stable micro-weathering stratum not less than 0.5m, and construction is performed according to a double-control condition of "pile bottom elevation + holding force layer" during construction.
Further, step S100 further includes the steps of:
step S110, digging a hole in a rotary mode, wherein the hole is dug in the foundation in the vertical direction of the foundation in a rotary mode;
still further, referring to fig. 2, the step S110 further includes the steps of:
step S111, detecting geological information of a foundation, and designing the size of a hole according to the geological information;
and S112, rotary drilling the hole according to the size of the hole.
Specifically, referring to fig. 3, the geological information includes a weathering degree of soil at a predicted hole punching position and a position where an boulder exists, the higher the weathering degree of the soil at the predicted hole punching position is, the larger the hole size designed according to building regulations is, and if the boulder is in a soil layer above fully weathered granite, the boulder is penetrated, and the frame pillar is disposed on the boulder. If the boulder is in the completely weathered granite rock-soil layer and the pile diameter is not more than 1.4 meters, the boulder enters a final hole with the length of 4.5 meters; the boulder enters a 3.7-meter final hole of the boulder when the pile diameter is not more than 1.4 meters in the strongly weathered granite rock-soil layer, the specific data are set according to geological information of the position where the boulder is regulated and constructed in the building industry, and the specific data are not limited.
Step S120, manufacturing a frame strut support, manufacturing a frame strut reinforcement cage, and splicing the manufactured frame strut reinforcement cage along the axis direction to form the frame strut support;
further, referring to fig. 4 and 7, the step S120 further includes the steps of:
step S121, manufacturing longitudinal bars 111, and connecting the reinforcing steel bars along the axial direction of the reinforcing steel bars to form the longitudinal bars 111;
specifically, the longitudinal rib 111 is formed by longitudinally connecting reinforcing steel bars by a connecting member to form the longitudinal rib 111.
Step S122, manufacturing frame pillar outer ring main ribs 110, wherein a plurality of longitudinal ribs are annularly arranged along the circumferential direction to form the frame pillar outer ring main ribs 110;
step S123, providing inner stirrups 140 arranged along the circumferential direction of the frame strut outer ring main reinforcement 110, wherein the inner stirrups 140 are arranged inside the frame strut outer ring main reinforcement 110 at intervals along the axial direction of the frame strut outer ring main reinforcement 110, the inner stirrups 140 are annular, and at this time, the inner stirrups 140 are in an open state;
specifically, the diameter of the frame support pile 100 is large, the reinforcing bars are very dense, and the construction is difficult, so that the inner stirrup 140 in the open state is firstly welded to the frame support outer ring main reinforcement 110, and the inner stirrup 140 in the open state can be completely attached to the frame support outer ring main reinforcement 110.
Step S124, arranging frame strut inner ring main ribs 130, arranging a plurality of longitudinal ribs 111 as frame strut inner ring main ribs 130, annularly arranging the frame strut inner ring main ribs 130 in the inner stirrups 140, and welding the frame strut inner ring main ribs 130 and the inner stirrups 140;
specifically, after the inner stirrups 140 and the frame pillar outer ring main reinforcement 110 are welded, the inner stirrups 140 are welded to each other, so that the inner stirrups 140 are in a closed state, and the structural strength of the reinforcement cage is improved.
Step S125, an outer stirrup 120 is provided, the outer stirrup 120 is provided along the circumferential direction of the main reinforcement 110 on the outer ring of the frame strut, and the outer stirrup 120 is welded to the main reinforcement 110 on the outer ring of the frame strut.
Specifically, the outer stirrups 120 are arranged at intervals, and the reinforcing steel bars are connected along the axial direction of the reinforcing steel bars to form longitudinal bars 111; the plurality of longitudinal ribs 111 are arranged along the circumferential direction to form frame strut outer ring main ribs 110; the inner stirrups 140 are arranged along the circumferential direction of the frame strut outer ring main reinforcement 110, the inner stirrups 140 are arranged inside the frame strut outer ring main reinforcement 110 at intervals along the axial direction of the frame strut outer ring main reinforcement 110, at this time, the inner stirrups 140 are in an open state, and the inner stirrups 140 are used for fixing the frame strut outer ring main reinforcement 110; welding a plurality of the inner stirrups 140 in an open state to each other, and after welding the inner stirrups 140, the inner stirrups 140 are in a closed state; the plurality of longitudinal ribs 111 are arranged into frame strut inner ring main ribs 130, the frame strut inner ring main ribs 130 are annularly arranged inside the inner stirrups 140, the frame strut inner ring main ribs 130 penetrate the inner stirrups 140, and the frame strut inner ring main ribs 130 are welded with the inner stirrups 140; and an outer stirrup 120 is arranged outwards along the periphery of the frame strut outer ring main reinforcement 110, and the outer stirrup 120 is welded with the frame strut outer ring main reinforcement 110.
Step S130, pouring concrete, placing the frame support post bracket into the hole, and pouring concrete into the frame support post bracket to form the frame support post.
Step S200, constructing a pile cap on the frame pillar, wherein the pile cap is used for bearing the load of a building;
specifically, the pile caps 200 are designed to have a corresponding size according to the installation position of the frame support column 100, and in this embodiment, the pile caps are single-column structures, that is, one pile cap 200 is only built on the top end of one frame support column 100, and the pile cap 200 is used for bearing the load of the subsequent ground surface building.
Further, step S200 further includes the steps of:
step S210, constructing a pile cap main body, excavating earthwork around the frame support on a foundation to form an accommodating space, placing the steel bar support into the accommodating space, pouring concrete into the accommodating space, and constructing the pile cap main body;
wherein, step S210 further includes the following steps:
step S211, excavating a pile cap foundation pit around the frame pillar on the foundation 10;
step S212, referring to fig. 8, fabricating a cushion layer 800 of the pile cap, leveling the bottom ground of the pile cap foundation pit, and pouring concrete into the bottom ground of the pile cap foundation pit to form the cushion layer 800 of the pile cap;
step S213, manufacturing a brick molding 900, on the cushion layer 800 of the bearing platform, manufacturing the brick molding 900 by building bricks around the frame pillar, and connecting the steel bar support and the brick molding through concrete;
step S214, embedding a steel bar support, placing the steel bar support in the pile cap foundation pit, pouring concrete into the pile cap foundation pit, and embedding the steel bar support;
step S215, forming a pile cap body, and pouring concrete into the brick molding bed 900 to form the pile cap body.
Specifically, compare with the mode that adopts the fixed die plate to make pile cap main part, the complicated process that the later stage demolded can be avoided to the construction mode that uses the brick fetal membrane, practices thrift manpower and materials.
Step S220, backfilling earthwork around the pile cap 200 in the foundation 10, and leveling the backfilled earthwork to form a plane;
step S230, manufacturing a pile cap steel bar support on the foundation;
step S240, forming a pile cap, and pouring concrete on a plane formed after backfilling the earth in the foundation 10, wherein the plane surrounds the pile cap body to form the pile cap 200.
Specifically, in this embodiment, the horizontal plane of the pile cap 200 is lower than the plane to form a pot hole in the shape of the pile cap 200, and the structural column 400 of the subsequent building can be directly connected with the pile cap 200 without additionally excavating a foundation, thereby saving the cost.
Step S300, constructing a frame ground beam on the top of the foundation 10, and connecting a part of the pile cap 200 through the frame ground beam 300.
Further, step S300 further includes the steps of:
step S310, excavating earthwork on the foundation to form a containing groove for containing the frame ground beam 300;
step S320, manufacturing a frame-to-ground beam reinforcement cage, binding and connecting reinforcement bars to form the frame-to-ground beam reinforcement cage, and binding and connecting a plurality of frame-to-ground beam reinforcement cages to form a reinforcement cage of the frame-to-ground beam 300;
further, step S320 further includes the steps of:
step S321, manufacturing longitudinal bars, and connecting the reinforcing steel bars along the axial direction of the reinforcing steel bars to form the longitudinal bars;
step S322, manufacturing frame support ground beam main ribs, wherein a plurality of longitudinal ribs are arranged along the circumferential direction to form the frame support ground beam main ribs;
step S323, arranging frame support ground beam outer stirrups along the circumferential direction of the frame support ground beam main reinforcements, and enabling the frame support ground beam main reinforcement to be sleeved inside the frame support ground beam outer stirrups;
and S324, finishing the binding of the reinforcement cage of the frame-supported ground beam.
Specifically, the reinforcement binding method using the frame-supported ground beam 300 solves the problem that a large number of reinforcements are needed in the conventional reinforcement binding method using the frame-supported ground beam, the frame-supported ground beam reinforcement cage is matched with the accommodating groove, and the frame-supported ground beam reinforcement cage is square.
Step S330, placing the frame support ground beam reinforcement cage into the accommodating groove excavated on the foundation;
step S340, forming the frame ground beam 300, and pouring concrete into the accommodating groove to form the frame ground beam 300.
Specifically, for the fabrication of the reinforcement cage of the frame-supported ground beam 300, the reinforcement is longitudinally connected as a longitudinal reinforcement; the plurality of longitudinal ribs are arranged in a square shape to form frame support ground beam main ribs, reinforcing steel bars at one end of the frame support ground beam main ribs in the vertical direction are gluten, and reinforcing steel bars at one end far away from the gluten are bottom ribs; arranging square frame ground beam outer stirrups along the circumferential direction of the frame ground beam, so that gluten rings of the frame ground beam main reinforcements are sleeved outside the frame ground beam outer stirrups; make the end muscle of a frame ground beam owner muscle trade set up in the outside of a frame ground beam outer stirrup makes a frame ground beam outer stirrup with a frame ground beam owner muscle's a tip ligature is connected, accomplishes the ligature of a frame ground beam steel reinforcement cage is at last by the workman certainly one side tip of a frame ground beam is moving back ligature frame grudging post, lacing wire toward the opposite side tip, is accomplished the ligature of a frame ground beam steel reinforcement cage.
In this embodiment, the pile cap 200 has a pile cap rebar stand; frame props ground roof beam 300 and has frame props ground roof beam owner muscle and frame and props ground roof beam outer stirrup, frame props ground roof beam outer stirrup and follows the frame props the circumference setting of ground roof beam owner muscle, makes the frame props the reinforcing bar of ground roof beam 300 and forms framework of steel reinforcement, pile cap 200 with frame props ground roof beam 300 and passes through pile cap steel bar support with framework of steel reinforcement connects.
Specifically, the pile cap 200 has a pile cap reinforcement bracket, the pile cap reinforcement bracket has a pile cap bottom rib and a pile cap gluten, the pile cap bottom rib is vertically arranged in the foundation 10, the pile cap bottom rib is used for tensile resistance, the pile cap gluten is horizontally arranged on the foundation 10, the pile cap gluten is used for pressure resistance, and the pile cap bottom rib and the pile cap gluten are connected in a connection manner; the frame ground beam 300 is provided with a frame ground beam main rib and a frame ground beam outer stirrup; the frame props up ground roof beam outer stirrup and follows the frame props up the circumference setting of ground roof beam owner muscle, makes the frame props up the reinforcing bar formation steel reinforcement cage of ground roof beam 300, pile cap 200 with the frame props up ground roof beam 300 and passes through muscle at the bottom of the pile cap and pile cap gluten with the mutual ligature of steel reinforcement cage is connected.
In the present embodiment, referring to fig. 6, the foundation 10 includes a first working area 600 and a second working area 700, a bottom plate is disposed in the first working area 600, the bottom plate is connected to the pile cap 200 and the frame-supported ground beam 300, and the bottom plate is used for bearing the load of the ground surface building; the second working area 700 is matched with the frame post 100 and the frame ground beam 300 to bear the load of the ground surface building.
Specifically, the first working area 600 adopts a design foundation form of 'frame support piles 100+ frame support ground beams 300' and is provided with a bottom plate, so that the normal stress requirement of the surface building is ensured; referring to fig. 5, in the second working area 700, only the form of the design foundation of "frame-supported piles 100+ frame-supported ground beams 300" is reserved, the foundation stress requirement of the ground surface building can be guaranteed without adding a bottom plate, and the requirement that the subway tunnel protection line passes through the bottom of the foundation of the building is met, so that a safe space is reserved for the later subway tunnel construction.
In combination with all the embodiments, the invention adopts a basic design form of 'frame support piles 100+ frame support ground beams 300', the frame support piles 100 are arranged after holes of the frame support piles 100 are vertically dug out in a foundation, then the building pile cap 200 and the frame support ground beams 300 are built on the foundation 10 at the positions corresponding to the frame support piles 100, and the pile cap 200 is used for sharing the load of a building.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A construction method for crossing a subway line is characterized by comprising the following steps:
arranging a frame pillar in the foundation;
constructing a pile cap on the frame pillar, wherein the pile cap is used for bearing the load of a building;
and constructing a frame ground beam on the top of the foundation, wherein part of the pile cap is connected through the frame ground beam.
2. The method of building construction across a subway line as claimed in claim 1, wherein said step of providing a frame pillar within said foundation comprises:
digging a hole in a rotary mode, wherein the hole is dug in the foundation in a rotary mode along the vertical direction of the foundation;
manufacturing a frame pillar reinforcement cage, and splicing the manufactured frame pillar reinforcement cage along the axis direction of the frame pillar reinforcement cage to form a frame pillar support;
and pouring concrete, putting the frame strut support into the hole, and pouring concrete into the frame strut support to form the frame strut.
3. The construction method for the subway-spanning building according to claim 2, wherein said step of rotary drilling the hole comprises:
detecting geological information of a foundation, and designing the size of a hole according to the geological information;
and rotary excavating the hole according to the size of the hole.
4. The method of claim 2, wherein the step of fabricating a frame-prop reinforcement cage comprises:
manufacturing longitudinal bars, and connecting the reinforcing steel bars along the axis direction of the reinforcing steel bars to form the longitudinal bars;
manufacturing frame pillar outer ring main ribs, wherein a plurality of longitudinal ribs are arranged along the circumferential direction to form the frame pillar outer ring main ribs;
arranging inner stirrups along the circumferential direction of the main reinforcements on the outer ring of the frame strut, wherein a plurality of inner stirrups are arranged inside the main reinforcements on the outer ring of the frame strut at intervals along the axial direction of the main reinforcements on the outer ring of the frame strut, and the inner stirrups are in an open state at the moment;
arranging inner ring main ribs of the frame strut, arranging a plurality of longitudinal ribs as the inner ring main ribs of the frame strut, and welding the inner ring main ribs of the frame strut with the inner hoop ribs;
and arranging an outer stirrup, and arranging the outer stirrup in the circumferential direction of the main reinforcement of the outer ring of the frame strut, wherein the outer stirrup is welded with the main reinforcement of the outer ring of the frame strut.
5. The method of building construction across a subway line as claimed in claim 1, wherein said step of constructing a pile cap on said frame post comprises:
constructing a pile cap main body, excavating earthwork around the frame support on a foundation to form an accommodating space, placing the steel bar support into the accommodating space, pouring concrete into the accommodating space, and constructing the pile cap main body;
backfilling earthwork, namely backfilling earthwork around the pile cap in the foundation, and leveling the backfilled earthwork to form a plane;
manufacturing a pile cap steel bar support;
and forming a pile cap, pouring concrete on a plane formed after backfilling earth in the foundation, wherein the plane surrounds the pile cap main body to form the pile cap.
6. The method of building construction across a subway line as claimed in claim 5, wherein said step of constructing a pile cap body comprises:
excavating a pile cap foundation pit, and excavating the pile cap foundation pit around the frame strut on the foundation;
manufacturing a cushion layer of the bearing platform, leveling the bottom ground of the foundation pit of the pile bearing platform, and pouring concrete into the bottom ground of the foundation pit of the pile bearing platform to form the cushion layer of the bearing platform;
manufacturing a brick bed course, and manufacturing a brick bed course on the cushion layer of the bearing platform by building bricks around the frame pillar;
embedding a steel bar support, placing the steel bar support in the pile cap foundation pit, pouring concrete into the pile cap foundation pit, and embedding the steel bar support;
and forming a pile cap main body, and pouring concrete into the brick moulding bed to form the pile cap main body.
7. The method of building construction across a subway line as claimed in claim 1, wherein said step of constructing a framed ground beam on top of said foundation comprises:
excavating earthwork, excavating the earthwork on the foundation to form a containing groove for containing the frame ground beam;
manufacturing a frame-supporting ground beam reinforcement cage, binding and connecting reinforcement bars to form the frame-supporting ground beam reinforcement cage, and binding and connecting a plurality of frame-supporting ground beam reinforcement cages to form a reinforcement cage of the frame-supporting ground beam;
placing the frame support ground beam reinforcement cage into the accommodating groove excavated on the foundation;
and forming a frame support ground beam, and pouring concrete into the accommodating groove.
8. The method of claim 7, wherein the step of fabricating a steel reinforcement cage of the frame-supported ground beam comprises:
manufacturing longitudinal bars, and connecting the reinforcing steel bars along the axis direction of the reinforcing steel bars to form the longitudinal bars;
manufacturing frame support ground beam main ribs, wherein a plurality of longitudinal ribs are arranged along the circumferential direction to form the frame support ground beam main ribs;
arranging frame support ground beam outer stirrups along the circumferential direction of the frame support ground beam main reinforcements, so that the frame support ground beam main reinforcements are sleeved inside the frame support ground beam outer stirrups;
and finishing the binding of the reinforcement cage of the frame-supported ground beam.
9. The method of building construction across a subway line as claimed in claim 8, wherein said pile cap has a pile cap rebar bracket; the frame props up the grade roof beam and has a frame props up grade roof beam owner muscle and a frame outer stirrup, a frame props up the outer stirrup of grade roof beam and follows the circumference setting of a frame props up the grade roof beam owner muscle, makes the reinforcing bar of a frame props up the grade roof beam and forms framework of steel reinforcement, pile cap with a frame props up the grade roof beam and passes through pile cap steel bar support with framework of steel reinforcement connects.
10. The method of claim 1, wherein the foundation includes a first working area and a second working area, wherein a bottom plate is provided in the first working area, the bottom plate being connected to the pile cap and the frame-supported ground beam, the bottom plate being configured to bear a load of a surface structure; and the second operation area is matched with the frame support ground beam through the frame support column so as to bear the load of the ground surface building.
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