CN110952993B - Semi-assembly type pipe curtain structure based on steel reinforced concrete connection and construction process - Google Patents

Semi-assembly type pipe curtain structure based on steel reinforced concrete connection and construction process Download PDF

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Publication number
CN110952993B
CN110952993B CN201911132592.1A CN201911132592A CN110952993B CN 110952993 B CN110952993 B CN 110952993B CN 201911132592 A CN201911132592 A CN 201911132592A CN 110952993 B CN110952993 B CN 110952993B
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steel
concrete
pipe
section
bearing structure
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CN110952993A (en
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王连广
李雪
王一博
刘姝
田宇琳
刚明慧
陈百玲
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Northeastern University China
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Northeastern University China
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/006Lining anchored in the rock
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/08Lining with building materials with preformed concrete slabs
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor

Abstract

Half assembled pipe curtain structure based on shaped steel concrete connects, including side direction bearing structure and horizontal bearing structure, side direction bearing structure is used for supporting the side direction country rock, horizontal bearing structure is used for supporting ground, connects through horizontal bearing structure between the side direction bearing structure, side direction bearing structure and horizontal bearing structure include a plurality of big steel pipes, and are adjacent link to each other through prefabricated connecting elements between the big steel pipe, the big steel pipe intussuseption is filled with concrete I and is used for encapsulating prefabricated connecting elements. The construction process of the semi-fabricated pipe curtain structure based on the steel reinforced concrete connection comprises the following steps: step 1, manufacturing a working well; step 2, prefabricating a connecting member outside the field; step 3, installing a pipe curtain; step 4, forming a pipe curtain structure; step 5, grouting reinforcement treatment and building construction; the prefabricated connecting component manufacturing process is standardized, the concrete pouring quality of the prefabricated connecting component is guaranteed, and the phenomena of insufficient compactness of concrete pouring and internal concrete loss are avoided.

Description

Semi-assembly type pipe curtain structure based on steel reinforced concrete connection and construction process
Technical Field
The invention belongs to the technical field of underground engineering construction, and particularly relates to a semi-assembled pipe curtain structure based on steel reinforced concrete connection and a construction process.
Background
The pipe curtain method is based on the jacking of a single steel pipe in an underground soil layer structure, a plurality of densely arranged large-diameter steel pipes are jacked around a proposed underground building by using a pipe jacking technology, steel bars are cut through on the steel pipes by using an inter-pipe cutting technology, operation holes for cleaning slag between the steel pipes are formed, the slag between the steel pipes and in the large steel pipes is cleaned manually, bolts or steel bars are transversely inserted between the large steel pipes, then concrete is cast in situ between the steel pipes and in the large steel pipes, and the large steel pipe concrete is transversely connected by using reinforced concrete beams (plates) to form the steel pipe curtain structure. The construction method is used for excavating core earthwork in a structure under the maintenance of a pipe curtain structure. The construction method has the remarkable characteristic that a structure is formed firstly, and then earthwork in the structure is excavated. When the pipe curtain structure is constructed, the residue soil in the steel pipes and among the steel pipes which are jacked in must be cleaned, otherwise, the bearing capacity and rigidity of the reinforced concrete which is transversely connected among the steel pipes cannot be ensured. In actual engineering, the transverse distance between the large steel pipes is small, and the slag between the steel pipes needs to be manually removed from the steel pipes, so that the construction process is very difficult, the strength grade of the poured concrete is possibly influenced due to incomplete cleaning of the slag between the steel pipes, the bearing capacity and the rigidity of the whole structure are greatly reduced, and potential safety hazards are caused to the engineering. Patent CN106089243B provides a pipe curtain supporting construction based on steel pipe concrete connection, utilizes minor diameter connecting steel pipe to couple together big steel pipe, pours concrete into big steel pipe and connecting steel pipe simultaneously, forms the pipe curtain structure, and this method has the characteristics that the bearing capacity is high, rigidity is big, the construction is simple nimble. However, when the section size of the connecting steel pipe is small, or the distance between the large steel pipes is large, the concrete in the connecting steel pipe is not compact enough, and even the concrete in the connecting steel pipe is lost, so that the pipe curtain structure can not be guaranteed to have good bearing capacity and rigidity, and potential safety hazards can be brought to subsequent underground building construction. To the not enough and the difficulty that exists in the construction that above-mentioned pipe curtain structure exists, research and development a novel pipe curtain structure that the construction is simple, guarantee quality has important practical meaning.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a semi-fabricated pipe curtain structure based on steel reinforced concrete connection and a construction process. Namely, the connecting members are prefabricated outside the site, after the large steel pipes are jacked in the construction site, the prefabricated connecting members are installed between the large steel pipes, and then concrete is poured in the large steel pipes. The novel pipe curtain structure has the characteristics of no influence on ground traffic, high bearing capacity, simplicity in construction and the like, and meanwhile, the assembled rapid construction of the pipe curtain supporting structure can be realized, the quality of the transverse prefabricated connecting component is guaranteed, and the rigidity of the transverse prefabricated connecting component is improved. The method is suitable for ultra-shallow buried large-span underground structures, and is particularly suitable for urban areas with dense ground buildings, dense underground pipelines, busy traffic and transportation, short construction period and strict requirements on ground subsidence, and underground structure projects such as subway projects, underground pedestrian ways, large-span underground malls and the like with complex geological conditions.
In order to achieve the purpose, the invention adopts the following technical scheme:
half assembled pipe curtain structure based on shaped steel concrete connects, including side direction bearing structure and horizontal bearing structure, side direction bearing structure is used for supporting side direction country rock, horizontal bearing structure is used for supporting ground, and is adjacent connect through horizontal bearing structure between the side direction bearing structure, side direction bearing structure is the same with horizontal bearing structure, all includes a plurality of big steel pipes, and is adjacent link to each other through prefabricated connecting element between the big steel pipe, and the axis of prefabricated connecting element sets up with big steel pipe axis is perpendicular, big steel pipe intussuseption is filled with concrete I, prefabricated connecting element is located the inboard portion of big steel pipe and encapsulates in concrete I.
Prefabricated connecting element is the steel pipe concrete connecting element of built-in shaped steel, the steel pipe concrete connecting element of built-in shaped steel includes little steel pipe, shaped steel I, tip steel sheet I and concrete II, I outside cover of shaped steel is equipped with little steel pipe, and I both ends of shaped steel stretch out little steel pipe setting, and all is connected with tip steel sheet I at I both ends tip of shaped steel, has all seted up preformed hole I on the flange board of I tip of shaped steel and web, packs concrete II in little steel pipe, will be located I encapsulation of shaped steel in the little steel pipe in concrete II, the steel pipe concrete connecting element cross-section of built-in shaped steel is square or circular.
Prefabricated connecting element is the reinforced concrete connecting element of built-in shaped steel, the reinforced concrete connecting element of built-in shaped steel includes steel reinforcement cage, shaped steel II, tip steel sheet II and concrete III, II outside covers of shaped steel are equipped with the steel reinforcement cage, and II both ends of shaped steel stretch out the steel reinforcement cage setting, and all are connected with tip steel sheet II at II both ends tip of shaped steel, have all seted up preformed hole II on the flange board and the web of II tip of shaped steel, encapsulate steel reinforcement cage and the shaped steel II that is located the steel reinforcement cage inboard in prefabricated concrete III, and the cross-section of the reinforced concrete connecting element of built-in shaped steel is circular or square.
The end steel plate I and the end steel plate II are identical in structure and comprise steel plates and steel strips, the steel plates are perpendicularly welded to the surface of each steel plate, the steel plates are arranged in parallel, the other steel plate is arranged between the two steel plates arranged in parallel, gaps are reserved between the end portions and the two steel plates arranged in parallel, and reserved holes III corresponding to the reserved holes I or the reserved holes II are formed in the three steel plates.
Tip steel sheet I and tip steel sheet II are connected formula and non-connected formula, when for the connected formula, offer the screw hole in tip steel sheet I and tip steel sheet II's steel sheet four corners, have better connection ability when requiring half assembled pipe curtain structure based on shaped steel concrete connects, pass through the butt joint of tip steel sheet with adjacent prefabricated connecting element, utilize the bolt to link together the shaped steel that prefabricated connecting element stretches out.
The radial section of the prefabricated connecting component is circular or square.
The construction process of the semi-fabricated pipe curtain structure based on the steel reinforced concrete connection comprises the following steps:
step 1, manufacturing a working well: excavating and supporting a working well in a construction site needing pipe curtain supporting;
step 2, prefabricating a connecting component outside the field:
1) manufacturing prefabricated connecting components in a factory: cutting the section steel II according to the design requirement, and drilling a reserved hole II in a flange plate and a web plate at the end part of the section steel II; manufacturing a steel reinforcement cage, embedding the section steel II in the steel reinforcement cage, and pouring concrete III to form a reinforced concrete connecting member with the section steel inside; or cutting the section steel I according to the design requirement, and drilling a reserved hole I in a flange plate and a web plate at the end part of the section steel I; cutting the small steel pipe, embedding the section steel I in the small steel pipe, and pouring concrete II to form a steel pipe concrete connecting member with the section steel arranged inside;
2) manufacturing an end steel plate I or an end steel plate II: cutting a steel plate according to the design size and thickness requirements, vertically welding three steel plate strips on the side surface of the steel plate according to the design position, and drilling a reserved hole III corresponding to the position of the reserved hole I or the reserved hole II on the steel plate strips;
step 3, installing a pipe curtain: firstly, marking a determined position of each large steel pipe on a rock-soil layer section of a construction site, sequentially jacking a plurality of large steel pipes into the rock-soil layer by using a jack according to the position marked by the rock-soil layer section, manually cleaning up muck in the large steel pipes after jacking the large steel pipes, forming holes on the side surfaces of the adjacent large steel pipes according to the designed size, cleaning up muck between the large steel pipes at the holes, enabling the muck to reach a soft state, penetrating a prefabricated connecting component, and installing an end steel plate I or an end steel plate II at two ends of the prefabricated connecting component through bolts;
step 4, forming a pipe curtain structure: pouring concrete I in the large steel pipe to form a semi-assembly type pipe curtain structure based on steel section concrete connection;
and 5, grouting and reinforcing the footfall stratum of the pipe curtain structure, building and decorating the building, and finishing the construction of the underground structure.
The invention has the beneficial effects that:
1) the large steel pipes are transversely connected by the prefabricated connecting components prefabricated outside the field, so that the semi-assembly type construction of a structural system is realized, and the construction is convenient and fast.
2) The prefabricated connecting component manufacturing process is standardized, the concrete pouring quality of the prefabricated connecting component is guaranteed, and the phenomenon that concrete is not tightly poured enough and even concrete in the connecting component is possibly lost is avoided.
3) The transverse connection rigidity of the steel pipe concrete pipe curtain structure can be greatly improved by the aid of the built-in section steel arranged on the prefabricated connecting components, and ground surface settlement can be effectively controlled. The novel pipe curtain structure can be widely applied to ultra-shallow buried large-span underground structures in urban areas with dense ground buildings, dense underground pipelines, busy traffic and transportation, short construction period and strict requirements on ground subsidence, and projects with complex geological conditions and difficulty in treating underground water.
Drawings
FIG. 1 is a schematic cross-sectional view of a semi-fabricated tube sheet structure (reinforced concrete connecting member with built-in section steel) based on section steel concrete connection according to example 1 of the present invention;
FIG. 2 is a top view in longitudinal section of a semi-fabricated tube curtain structure (reinforced concrete connecting member with built-in section steel) based on section steel concrete connection according to example 1 of the present invention;
FIG. 3 is a detailed view of the connection between a large steel pipe of a semi-fabricated pipe curtain structure based on steel reinforced concrete connection and a reinforced concrete connection member with built-in steel profiles in the embodiment 1 of the present invention;
FIG. 4 is a schematic sectional view of a-a of a reinforced concrete connecting member with built-in section steels of FIG. 3 according to example 1;
FIG. 5 is a schematic sectional view of a reinforced concrete connecting member b-b of FIG. 3 with built-in shape steels according to example 1;
FIG. 6 is a side view of the non-jointed end steel plate of the semi-assembled tube sheet structure based on the steel reinforced concrete jointing of example 1;
FIG. 7 is a schematic view of the non-jointed end steel plates c-c of FIG. 6 of the semi-assembled tube sheet structure based on steel reinforced concrete jointing according to example 1;
FIG. 8 is a detailed view of the connection between a large steel pipe of a semi-fabricated pipe curtain structure based on steel reinforced concrete connection and a reinforced concrete connection member with built-in steel profiles in embodiment 2 of the present invention;
FIG. 9 is a schematic sectional view of a reinforced concrete connecting member d-d having a built-in section steel according to FIG. 8 of example 2;
FIG. 10 is a schematic sectional view showing an e-e portion of a reinforced concrete connecting member with built-in section steel of FIG. 8 according to example 2;
FIG. 11 is a schematic cross-sectional view of a semi-fabricated tube sheet structure (steel pipe concrete connecting member with built-in section steel) based on section steel concrete connection according to example 3 of the present invention;
FIG. 12 is a top view in longitudinal section of a semi-fabricated tube sheet structure (steel pipe concrete connecting member with built-in section steel) based on section steel concrete connection according to example 3 of the present invention;
FIG. 13 is a detailed view of the connection between a large steel pipe of a semi-fabricated pipe curtain structure based on steel reinforced concrete connection and a steel pipe concrete connection member with steel profiles built in according to embodiment 3 of the present invention;
FIG. 14 is a schematic sectional view of a concrete filled steel tube connecting member with built-in section steel of FIG. 13 according to example 3;
FIG. 15 is a side view of the connecting end steel plates of the semi-fabricated tube curtain structure based on the steel reinforced concrete connection of the embodiment 3 of the invention;
FIG. 16 is a schematic view of example 3 of the present invention showing the g-g direction of the connecting end steel plates of FIG. 15 based on the semi-fabricated tube curtain structure of the steel reinforced concrete connection;
FIG. 17 is a detailed view of the connection between a large steel pipe of a semi-fabricated pipe curtain structure based on steel reinforced concrete connection and a steel pipe concrete connection member with steel profiles built in according to embodiment 4 of the present invention;
FIG. 18 is a schematic sectional view of a concrete filled steel tube connecting member h-h of FIG. 17 with built-in section steel according to example 4 of the present invention;
1-large steel pipe; 2-section steel I; 3-end steel plate I; 4-a reinforcement cage; 5-concrete I; 6-concrete II; 7-bolt; 8-concrete III; 9-steel lath; 10-small steel pipe, 11-preformed hole III, 12-section steel II, 13-end steel plate II, 14-threaded hole, 15-steel plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
The prefabricated connecting member of the embodiment is a reinforced concrete connecting member with built-in section steel, and the section steel of the embodiment is I-shaped steel.
As shown in fig. 1 to 7, the semi-fabricated pipe curtain structure based on steel reinforced concrete connection comprises a lateral support structure and a transverse support structure, wherein the lateral support structure is used for supporting lateral surrounding rocks, the transverse support structure is used for supporting the ground, the lateral support structure and the transverse support structure are connected through the transverse support structure, the lateral support structure and the transverse support structure are the same and respectively comprise a plurality of large steel pipes 1, the large steel pipes 1 are connected through prefabricated connecting members, the number and the diameter of the prefabricated connecting members are determined through calculation of the distance and the diameter between the adjacent large steel pipes 1, the axis of each prefabricated connecting member is perpendicular to the axis of the corresponding large steel pipe 1, concrete i 5 is filled in each large steel pipe 1, and the prefabricated connecting members are located in the inner portions of the large steel pipes 1 and are packaged in the concrete i 5.
Prefabricated connecting element is the reinforced concrete connecting element of built-in shaped steel, the reinforced concrete connecting element of built-in shaped steel includes steel reinforcement cage 4, II 12 of shaped steel, tip steel sheet II 13 and concrete III 8, II 12 outside cover of shaped steel is equipped with steel reinforcement cage 4, and steel reinforcement cage 4 is formed by longitudinal reinforcement and stirrup ligature, and little steel pipe 10 setting is stretched out at II 12 both ends of shaped steel, and all is connected with tip steel sheet II 13 through bolt 7 at II 12 both ends tip of shaped steel, has all seted up preformed hole II on the flange board of II 12 tip of shaped steel and web, encapsulates steel reinforcement cage 4 and II 12 of shaped steel that are located 4 inboards of steel reinforcement cage in concrete III 8, and the section of the reinforced concrete connecting element of built-in shaped steel is square.
The end steel plate II 13 comprises a steel plate 15 and steel strips 9, the steel plate 15 is perpendicularly welded with the three steel strips 9, the two steel strips 9 are arranged in parallel, the other steel strip is arranged between the two steel strips 9 arranged in parallel, a gap is left between the end part and the two steel plates arranged in parallel, and a preformed hole III 11 corresponding to the preformed hole II is formed in each three steel strip 9.
The end steel plate II 13 is of a non-connection type.
The radial section of the prefabricated connecting component is square.
The construction process of the semi-fabricated pipe curtain structure based on the steel reinforced concrete connection comprises the following steps:
step 1, manufacturing a working well: excavating and supporting a working well in a construction site needing pipe curtain supporting;
step 2, prefabricating a connecting component outside the field, and synchronously implementing the step 2 and the step 1:
1) manufacturing a reinforced concrete connecting member with prefabricated built-in section steel in a factory: cutting the section steel II 12 according to the design requirement, and drilling a reserved hole II in a flange plate and a web plate at the end part of the section steel II 12; manufacturing a reinforcement cage 4, and sleeving a stirrup on the longitudinal reinforcement to bind the reinforcement cage 4; embedding the section steel II 12 in the reinforcement cage 4, pouring concrete III 8, and pouring the length of the concrete III 8 to ensure that the reinforced concrete connecting member with the built-in section steel enters the large steel pipe 1 for a certain distance, wherein the certain distance is determined by the diameter and the bending resistance bearing capacity of the prefabricated connecting member, the two ends of the section steel II 12 protrude out of the surface of the concrete III 8, and the length of the protruding section steel II 12 is determined according to the distance between the adjacent large steel pipes 1 and the diameter of the large steel pipe 1 to form the reinforced concrete connecting member with the built-in section steel;
2) manufacturing an end steel plate II 13: cutting the steel plate 15 according to the design size and thickness requirements, vertically welding three steel plate strips 9 on the side surface of the steel plate 15 according to the design position, and drilling a reserved hole III 11 corresponding to the position of the reserved hole II on each steel plate strip 9;
step 3, installing a pipe curtain: firstly, marking a determined position of each large steel pipe 1 on a rock-soil layer section of a construction site, sequentially jacking a plurality of large steel pipes 1 into the rock-soil layer according to the position marked by the rock-soil layer section by using a jack, manually cleaning up muck in the large steel pipes 1 after jacking the large steel pipes 1, forming holes in the side surfaces of the adjacent large steel pipes 1 according to the designed size, cleaning up muck between the large steel pipes 1 at the holes to enable the muck to reach a soft state, then penetrating a reinforced concrete connecting member of prefabricated built-in section steel at the holes of the adjacent large steel pipes 1, mounting end steel plates II 13 at two ends of the reinforced concrete connecting member of the prefabricated built-in section steel through bolts 7, respectively matching steel plates 9 arranged in parallel to the end steel plates II 13 with two flange plates of the section steel, and matching the other steel plate 9 of the end steel plate II 13 with a web plate of the section steel;
step 4, forming a pipe curtain structure: concrete I5 is poured in the large steel pipe 1 to form a semi-assembly type pipe curtain structure based on steel section concrete connection;
and 5, grouting and reinforcing the footfall stratum of the pipe curtain structure, building and decorating the building, and finishing the construction of the underground structure.
Example 2
The present embodiment is different from embodiment 1 in that the reinforced concrete connecting member with built-in section steel has a circular section, as shown in fig. 8 to 10.
Example 3
The prefabricated connecting member of the embodiment is a concrete-filled steel tube connecting member with built-in section steel, and the section steel of the embodiment is I-shaped steel.
Shown in fig. 11 to 16, half assembled pipe curtain structure based on shaped steel concrete connects, including side direction bearing structure and horizontal bearing structure, side direction bearing structure is used for supporting side direction country rock, horizontal bearing structure is used for supporting ground, connect through horizontal bearing structure between the side direction bearing structure, side direction bearing structure and horizontal bearing structure include a plurality of big steel pipes 1, and are adjacent link to each other through prefabricated connecting element between the big steel pipe 1, and the cross-section of prefabricated connecting element is circular, and the axis of prefabricated connecting element and the perpendicular setting of big steel pipe 1 axis, the intussuseption of big steel pipe 1 is filled with concrete I5, prefabricated connecting element is located 1 inside portions of big steel pipe and encapsulates in concrete I5.
Prefabricated connecting elements is the steel pipe concrete connecting elements of built-in shaped steel, the steel pipe concrete connecting elements of built-in shaped steel include little steel pipe 10, shaped steel I2, tip steel sheet I3 and concrete II 6, I2 outside cover of shaped steel is equipped with little steel pipe 10, and I2 both ends of shaped steel stretch out little steel pipe 10 and set up, and all be connected with tip steel sheet I3 through bolt 7 at I2 both ends tip of shaped steel, have all seted up preformed hole I on the flange board of I2 tip of shaped steel and web, pack concrete II 6 in little steel pipe 10, encapsulate I2 of shaped steel that will be located little steel pipe 10 in concrete II 6, the steel pipe concrete connecting elements cross-section of built-in shaped steel is circular.
The tip steel sheet I3 includes steel sheet 15, steel strip 9, 15 perpendicular welding in surface of steel sheet has three steel strip 9, and wherein two steel strip 9 parallel arrangement, another one is located between two steel strip 9 of parallel arrangement, and leaves the clearance between two steel strip 9 of tip and parallel arrangement, all sets up the preformed hole III 11 that corresponds with preformed hole I on the three steel strip 9.
The end steel plate I3 is of a connection type, and threaded holes 14 are formed in four corners of a steel plate 15 of the end steel plate I.
The radial section of the prefabricated connecting component is circular.
The construction process of the semi-fabricated pipe curtain structure based on the steel reinforced concrete connection adopts the semi-fabricated pipe curtain structure based on the steel reinforced concrete connection, and comprises the following steps:
step 1, manufacturing a working well: excavating and supporting a working well in a construction site needing pipe curtain supporting;
step 2, prefabricating a connecting component outside the field, and synchronously implementing the step 2 and the step 1:
1) manufacturing a concrete filled steel tube connecting member with prefabricated built-in section steel in a factory: cutting the section steel I2 according to design requirements, and drilling a reserved hole I in a flange plate and a web plate at the end part of the section steel I2; cutting the small steel pipe 10 according to the design requirement, embedding the section steel I2 in the small steel pipe 10, and pouring concrete II 6 to form a steel pipe concrete connecting member with the section steel inside; the length of the small steel pipe 10 is determined to ensure that the concrete filled steel pipe connecting member with the built-in section steel enters the large steel pipe 1 for a certain distance, the certain distance is determined by the diameter and the bending resistance bearing capacity of the prefabricated connecting member, two ends of the section steel I2 protrude out of the end face of the small steel pipe 10, the length of the protruding section steel I2 is determined according to the distance between the adjacent large steel pipes 1 and the diameter of the large steel pipe 1, and the concrete filled steel pipe connecting member with the built-in section steel is formed;
2) manufacturing an end steel plate I3: cutting a steel plate 15 according to the design size and thickness requirements, vertically welding three steel plate strips 9 on the side surface of the steel plate 15 according to the design position, and drilling a reserved hole III 11 corresponding to the position of the reserved hole I on each steel plate strip 9;
step 3, installing a pipe curtain: firstly, marking a determined position of each large steel pipe 1 on a rock-soil layer section of a construction site, sequentially jacking a plurality of large steel pipes 1 into the rock-soil layer according to the position marked by the rock-soil layer section by using a jack, manually cleaning up muck in the large steel pipes 1 after jacking the large steel pipes 1, forming holes in the side surfaces of the adjacent large steel pipes 1 according to the designed size, cleaning up muck between the large steel pipes 1 at the holes to enable the muck to reach a soft state, then penetrating a steel pipe concrete connecting member of prefabricated built-in section steel at the holes of the adjacent large steel pipes 1, installing end steel plates I3 at two ends of the steel pipe concrete connecting member of the prefabricated built-in section steel through bolts 7, respectively matching steel plates 9 arranged in parallel to the end steel plates I3 with two flange plates of the section steel, and matching the other steel plate 9 of the end steel plate I3 with a web plate of the section steel;
step 4, forming a pipe curtain structure: concrete I5 is poured in the large steel pipe 1 to form a semi-assembly type pipe curtain structure based on steel section concrete connection;
and 5, grouting and reinforcing the footfall stratum of the pipe curtain structure, building and decorating the building, and finishing the construction of the underground structure.
Example 4
The present embodiment is different from embodiment 3 in that the section of the concrete filled steel tube connecting member with built-in section steel is square, as shown in fig. 17 and 18.

Claims (5)

1. The utility model provides a construction technology of half assembled pipe curtain structure based on shaped steel concrete connects, including side direction bearing structure and horizontal bearing structure, side direction bearing structure is used for supporting side direction country rock, horizontal bearing structure is used for supporting ground, and is adjacent connect through horizontal bearing structure between the side direction bearing structure, side direction bearing structure and horizontal bearing structure are the same, all include a plurality of big steel pipes, and are adjacent link to each other through prefabricated connecting element between the big steel pipe, and the axis of prefabricated connecting element sets up with big steel pipe axis is perpendicular, big steel pipe intussuseption is filled with concrete I, prefabricated connecting element is located big steel pipe and encapsulates in concrete I, its characterized in that includes following step:
step 1, manufacturing a working well: excavating and supporting a working well in a construction site needing pipe curtain supporting;
step 2, prefabricating a connecting component outside the field:
1) manufacturing prefabricated connecting components in a factory: cutting the section steel II according to the design requirement, and drilling a reserved hole II in a flange plate and a web plate at the end part of the section steel II; manufacturing a steel reinforcement cage, embedding the section steel II in the steel reinforcement cage, and pouring concrete III to form a reinforced concrete connecting member with the section steel inside; or cutting the section steel I according to the design requirement, and drilling a reserved hole I in a flange plate and a web plate at the end part of the section steel I; cutting the small steel pipe, embedding the section steel I in the small steel pipe, and pouring concrete II to form a steel pipe concrete connecting member with the section steel arranged inside;
2) manufacturing an end steel plate I or an end steel plate II: cutting a steel plate according to the design size and thickness requirements, vertically welding three steel plate strips on the side surface of the steel plate according to the design position, and drilling a reserved hole III corresponding to the position of the reserved hole I or the reserved hole II on the steel plate strips;
step 3, installing a pipe curtain: firstly, marking a determined position of each large steel pipe on a rock-soil layer section of a construction site, sequentially jacking a plurality of large steel pipes into the rock-soil layer by using a jack according to the position marked by the rock-soil layer section, manually cleaning up muck in the large steel pipes after jacking the large steel pipes, forming holes on the side surfaces of the adjacent large steel pipes according to the designed size, cleaning up muck between the large steel pipes at the holes, enabling the muck to reach a soft state, penetrating a prefabricated connecting component, and installing an end steel plate I or an end steel plate II at two ends of the prefabricated connecting component through bolts;
step 4, forming a pipe curtain structure: pouring concrete I in the large steel pipe to form a semi-assembly type pipe curtain structure based on steel section concrete connection;
and 5, grouting and reinforcing the footfall stratum of the pipe curtain structure, building and decorating the building, and finishing the construction of the underground structure.
2. The construction process of the semi-fabricated pipe curtain structure based on the steel reinforced concrete connection according to claim 1, characterized in that: the prefabricated connecting component comprises a concrete-filled steel tube connecting component with built-in section steel and a reinforced concrete connecting component with built-in section steel, the concrete-filled steel tube connecting component with built-in section steel comprises a small steel tube, section steel I, end steel plates I and concrete II, the small steel tube is sleeved outside the section steel I, two ends of the section steel I extend out of the small steel tube, the end steel plates I are connected to the end parts of the two ends of the section steel I, preformed holes I are formed in flange plates and web plates of the end parts of the section steel I, concrete II is filled in the small steel tube, and the section steel I in the small steel tube is packaged in the concrete II;
the reinforced concrete connecting component of built-in shaped steel includes steel reinforcement cage, shaped steel II, tip steel sheet II and concrete III, II outside covers of shaped steel are equipped with steel reinforcement cage, and II both ends of shaped steel stretch out the steel reinforcement cage setting, and all are connected with tip steel sheet II at II both ends tip of shaped steel, have all seted up preformed hole II on the flange board and the web of II tip of shaped steel, encapsulate steel reinforcement cage and be located steel reinforcement cage inboard shaped steel II in precast concrete III.
3. The construction process of the semi-fabricated pipe curtain structure based on the steel reinforced concrete connection according to claim 2, characterized in that: the end steel plate I and the end steel plate II are identical in structure and comprise steel plates and steel strips, the steel plates are perpendicularly welded to the surface of each steel plate, the steel plates are arranged in parallel, the other steel plate is arranged between the two steel plates arranged in parallel, gaps are reserved between the end portions and the two steel plates arranged in parallel, and reserved holes III corresponding to the reserved holes I or the reserved holes II are formed in the three steel plates.
4. The construction process of the semi-fabricated pipe curtain structure based on the steel reinforced concrete connection according to claim 2, characterized in that: tip steel sheet I and tip steel sheet II are connected formula and non-connected formula, when for the connected formula, offer the screw hole in tip steel sheet I and tip steel sheet II's steel sheet four corners, have better connection ability when requiring half assembled pipe curtain structure based on shaped steel concrete connects, pass through the butt joint of tip steel sheet with adjacent prefabricated connecting element, utilize the bolt to link together the shaped steel that prefabricated connecting element stretches out.
5. The construction process of the semi-fabricated pipe curtain structure based on the steel reinforced concrete connection according to claim 1, characterized in that: the radial section of the prefabricated connecting component is circular or square.
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