CN113846671A - Up-down separately digging type construction method for underground passage crossing under upper building pile foundation - Google Patents
Up-down separately digging type construction method for underground passage crossing under upper building pile foundation Download PDFInfo
- Publication number
- CN113846671A CN113846671A CN202110809090.9A CN202110809090A CN113846671A CN 113846671 A CN113846671 A CN 113846671A CN 202110809090 A CN202110809090 A CN 202110809090A CN 113846671 A CN113846671 A CN 113846671A
- Authority
- CN
- China
- Prior art keywords
- pouring
- pile foundation
- row
- rod
- blank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Sustainable Development (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an up-down separately digging type construction method of an underground passage crossing under an upper building pile foundation, which comprises the following steps of building a working well; dig the position of the distance D of the first row of pile foundation of distance upper portion building and form first section blank passageway full section, pour first section blank passageway dado frame in first section blank passageway, continue to excavate the position of the distance D of the second row of pile foundation of distance upper portion building under the prerequisite that remains the soil body of first row pile foundation lower part and form second section blank passageway and first section pile foundation portion blank passageway, pour first half and second section blank passageway dado frame of pile foundation underpinning structure, cut first row of pile foundation and dig the soil body that remains in first row pile foundation lower part away, pour the latter half of pile foundation underpinning structure. The invention is used for the construction of the underground passage when the lower end part of the pile foundation of the upper building is positioned in the newly-built underground passage.
Description
Technical Field
The invention relates to the technical field of construction of a tunnel underpass building, in particular to an up-down separately digging type construction method for an underground passage traversing the lower part of an upper building pile foundation.
Background
After the 21 st century, underground space development was underway to improve the comprehensive utilization efficiency of land. The rail transit engineering, the underground connection engineering and the like all need to construct channels underground. The underground passage can be constructed by adopting a subsurface excavation method. The underground passage may be penetrated from under an existing building (hereinafter, referred to as an upper building) by the surrounding environment. The pile foundation is a common foundation form for the upper building, and when an underground passage conflicts with the pile foundation, the method of pile foundation underpinning of the pile foundation of the upper building is often adopted to support so that the underground soil body of the original supporting pile foundation can be excavated away on the premise of not influencing the use of the upper building.
When the length of the pile foundation of the building is larger than the height of the newly-built underground passage structure, a passage range soil body can be excavated in the hole at one time, and a pile foundation underpinning structure is poured to support one end of the pile foundation barrel connected with the upper building and cut off the part of the pile foundation in the underground soil (hereinafter, the construction method is called as a passage blank one-time forming method). However, when the lower end portion of the pile foundation of the upper building is located in the newly-built underground tunnel, the construction of the underground tunnel cannot be performed by the one-shot forming of the tunnel blank. Therefore, a construction method is urgently needed in the field to realize the underground passage construction problem when the lower end part of the pile foundation of the upper building is positioned in the newly-built underground passage.
Disclosure of Invention
The invention aims to provide an up-down separately digging type construction method of an underground passage which traverses the lower part of an upper building pile foundation, which is used for the construction of the underground passage when the lower end part of the pile foundation of the upper building is positioned in a newly-built underground passage.
In order to achieve the purpose, the invention adopts the following technical scheme: an up-down separately digging type construction method of an underground passage crossing under an upper building pile foundation is characterized by comprising the following steps of 1, building a working well; 2. excavating to a position which is a distance D from a first row of pile foundations of an upper building through a working well according to the full section of the height of the underground passage to form a first section of blank passage, and pouring a first section of blank passage part passage dado frame in the first section of blank passage, wherein D is larger than the size of the pile foundations in the extension direction of the underground passage; 3. continuously excavating to a position which is away from a second row of pile foundations of an upper building by a distance D on the premise of retaining soil at the lower part of the first row of pile foundations to form a second section of blank channel and the upper half part of the first row of pile foundation part blank channel, wherein the strength of the soil retained at the lower part of the first row of pile foundations can meet the pile foundation embedment requirement; 4. pouring the upper half part of the pile foundation underpinning structure in the upper half part of the first row of pile foundation part blank channels and pouring the second section of blank channel part channel retaining wall frame in the second section of blank channels, and pouring the first section of blank channel part channel retaining wall frame, the upper half part of the pile foundation underpinning structure and the second section of blank channel part channel retaining wall frame together to support the first row of pile foundations; 5. cutting off the part of the first row of pile foundations in the first row of pile foundation part blank channels, digging away the soil body remained at the lower part of the first row of pile foundations to form the lower half part of the first row of pile foundation part blank channels, pouring the lower half part of the pile foundation underpinning structure in the lower half part of the first row of pile foundation part blank channels, forming the first row of pile foundation part blank channels by the upper half part of the first row of pile foundation part blank channels and the lower half part of the first row of pile foundation part blank channels, and enclosing the upper half part of the pile foundation underpinning structure and the lower half part of the pile foundation underpinning structure together to form the pile foundation underpinning structure; 6. and 3, traversing all pile foundations of the upper building, which extend into the passage area, according to the methods in the steps 3 to 5 to complete the construction of the whole underground passage. The invention solves the construction problem of the underground passage when the lower end part of the pile foundation of the upper building is positioned in the newly-built underground passage, can ensure the safety of the upper building, control the settlement of the upper building and ensure the smooth operation of the underground passage. The method is characterized in that the construction of the upper half part of the pile foundation underpinning structure and the channel dado frame positions at two ends of the pile foundation underpinning structure is completed in a segmented mode, the settlement of a superstructure can be reliably controlled corresponding to a rock soil body, if the soil body is muddy, after the soil body reserved at the lower part of the pile foundation is excavated, the upper half part of the pile foundation underpinning structure moves downwards to exceed the standard, the settlement of the superstructure exceeds the range, and the building safety is influenced easily. This method results in an increase in the amount of earth removed during construction.
Preferably, the specific process of step 4 is as follows: 4.1, installing an arched metal surface layer made of a steel plate in the upper half part of the first row of pile foundation part blank channel, wherein one end of the metal surface layer is in sealed butt joint with the first section of blank channel part channel retaining wall frame, the other end of the metal surface layer is provided with an outer folded edge, the first section of blank channel part channel retaining wall frame, the metal surface layer, the outer folded edge and the soil body of the upper half part of the first row of pile foundation part blank channel enclose a pouring cavity, a plurality of pouring pipes distributed along the circumferential direction of the metal surface layer are fixed on the surface of the metal surface layer on one side of the pouring cavity, the pouring pipes extend along the extension direction of the underground channel, a plurality of dry mixed concrete outflow ports are arranged on the circumferential surface of the pouring pipes, and the input ports of the pouring pipes are positioned at one end of the pouring pipes, which is far away from the first section of blank channel part channel retaining wall frame; 4.2, concrete enters the pouring cavity through the input port of the pouring pipe, the building pipe and the concrete outlet in sequence to form a concrete layer, the concrete layer pours the metal surface layer, the soil body on the upper half part of the first row of pile foundation part blank channel and the first section blank channel part channel retaining wall framework together, and the metal surface layer forms a pouring mold and a mold support in the process of pouring the concrete into the pouring cavity; and 4.3, pouring the second section of blank channel part channel protecting wall frame. The method is suitable for the construction of the muddy soil body, and can effectively prevent the settlement of the upper building on the premise of not increasing the thickness of the pile foundation underpinning structure and the wall of the channel retaining wall frame; the end face of the first section of blank channel part channel retaining wall frame is provided with a plurality of hanging holes, one end of the pouring pipe is hung in the hanging holes, and the other end of the pouring pipe is poured in the second section of blank channel part channel retaining wall frame. Need not build full hall support and support, need not remove the mould, construction convenience. The thickness of the steel plate is more than 1 cm. The whole pouring cavity can be reliably filled with the slurry. The built pile foundation underpinning structure has good strength.
Preferably, the pouring pipe is provided with a plurality of assistance rods distributed along the extending direction of the pouring pipe, one end of each assistance rod is hinged with the pouring pipe through a shaft pin, the shaft pin is perpendicular to the pouring pipe, the pouring pipe is provided with a through hole for the assistance rod to pass in and out of the end connected with the pouring pipe, and the end connected with the pouring pipe is provided with a push rod positioned in the pouring pipe; when the boosting rod rotates to be folded on the pouring pipe by taking the shaft pin as the shaft, the push rod is blocked in the pouring pipe, and the boosting rod is positioned in the pouring cavity; before the concrete is poured into the pouring cavity, the ejector rod is inserted into the pouring pipe to eject the ejector rod, the ejector rod drives the boosting rod to rotate by taking the shaft pin as a shaft, so that the boosting rod and the pouring pipe are separated into the soil body inserted into the upper half part of the blank channel of the first row of pile foundation parts. The strength and the connection reliability of the mixed concrete layer can be improved. The increase in strength does not result in an increase in the amount of earth removed.
Preferably, a plurality of steel claws are arranged on the outer surface of the power-assisted rod, and when the power-assisted rod and the pouring pipe are separated into the soil body inserted into the upper half part of the first row of pile foundation part blank channels, the steel claws are positioned in the soil body of the upper half part of the first row of pile foundation part blank channels. The connection reliability between the upper half part of the bridge pile foundation underpinning structure and the soil body can be improved.
Preferably, the boosting rod is a blind pipe structure with an inlet of the boosting rod part arranged at one end connected with the pouring pipe, the steel claws are arranged in four rows, the steel claws in the same row of the steel claws are distributed along the extension direction of the boosting rod, the four rows of the steel claws are distributed along the circumferential direction of the boosting rod, the distribution direction of the two rows of the steel claws is vertical to the distribution direction of the other two rows of the steel claws, the two rows of the steel claws are distributed along the radial direction of the shaft pin, the other two rows of the steel claws are distributed along the axial direction of the shaft pin, the steel claws distributed along the radial direction of the shaft pin are fixedly connected with the boosting rod, the boosting rod is provided with two rows of steel claw connecting through holes distributed along the axial direction of the shaft pin, the two rows of the steel claws distributed along the axial direction of the shaft pin are correspondingly and telescopically penetrated in the steel claw connecting through holes, the ejector rod is a blind pipe structure with one end closed towards one end of the first section blank channel part channel wall protecting frame and the other end opened, the ejector rod is provided with a plurality of air blowing holes capable of aligning with the inlets of the boosting rod one to another, when the air blowing hole is aligned with the inlet of the power-assisted rod part, the air blowing hole is in sealed butt joint with the inlet of the power-assisted rod part; when the boosting rod is folded on the pouring pipe, the steel claws in the two rows of steel claws axially distributed along the shaft pin are contracted in the boosting rod; and after the ejector rod drives the boosting rod to rotate by taking the shaft pin as a shaft and separate from the pouring pipe, air is blown into the ejector rod to enable the air pressure in the boosting rod to rise to push the two rows of steel claws distributed along the axial direction of the shaft pin out of the boosting rod, the ejector rod is pulled out, and concrete is injected into the pouring cavity through the pouring pipe and into a scratch groove formed in a soil body when the boosting rod swings. The structural strength of the pile foundation underpinning structure and the reliability of the grouting full gap can be improved.
Preferably, two plastic films are arranged in the power-assisted rod, the peripheries of the plastic films are connected with the inner surface of the power-assisted rod in a sealing mode to form two cavities disconnected with the inner space of the power-assisted rod, and the inner ends of the two rows of steel claws distributed along the axial direction of the shaft pin are located in the two cavities in a one-to-one correspondence mode. Not only can conveniently prevent the air leakage from the connecting through hole of the steel claw, but also can save labor when the steel claw extends out.
Preferably, the inner ends of the steel claws axially distributed along the shaft pin are provided with barbs for preventing the steel claws from falling out of the boosting rod. The connection reliability is good.
Preferably, two ends of the ejector rod are rotatably supported on the pouring pipe, and a rubber sealing ring which protrudes out of the ejector rod and extends along the circumferential direction of the air blowing hole is arranged on the outer circumferential surface of the position of the ejector rod, which is provided with the air blowing hole; the ejector pin inserts the in-process of pouring the pipe, rubber seal and helping hand pole stagger with the one end of pouring union coupling, the whole outer peripheral face of ejector pin is spaced apart with the inner peripheral surface of pouring the pipe between, the whole outer peripheral face of ejector pin and helping hand pole are spaced apart with the one end of pouring union coupling between, the ejector pin inserts and pours the pipe and all with the pipe of pouring separately back to the helping hand pole of drive, rotate the ejector pin and make the gas hole align with helping hand pole portion import, when the gas hole aligns with helping hand pole portion import, help the pole with pour through between the one end of union coupling and the ejector pin rubber seal sealing connection together. The push rod can be inserted to drive the boosting rod to unfold in a labor-saving manner, and the inlet of the boosting rod part and the air blowing hole can be reliably sealed and butted together to prevent air leakage.
Preferably, one end of the pouring pipe, which is far away from the first section of blank channel part channel retaining wall frame, is provided with an end plate, the other end of the pouring pipe is provided with a supporting ring, the supporting ring is connected to the inner surface of the pouring pipe through a connecting rib, an input port of the pouring pipe is eccentrically arranged on the end plate, one end of the ejector rod is provided with a circular connecting pin penetrating through the supporting ring, the other end of the ejector rod penetrates through the input port of the pouring pipe, and the supporting circular hole, the supporting ring and the ejector rod are coaxial. The outer diameter of the ejector rod can be maximized by turning to the feeding.
Preferably, when the boosting rod is folded onto the pouring pipe, the boosting rod is positioned outside the pouring pipe. Convenience in the time of can improving the preparation and make pour the pipe diameter less.
Preferably, the pouring pipe and the boosting rod are both of metal structures. The strength of the concrete layer and the strength of the pile foundation underpinning structure can be improved.
The invention has the following beneficial effects: the invention solves the construction problem of the underground passage when the lower end part of the pile foundation of the upper building is positioned in the newly-built underground passage, can ensure the safety of the upper building, control the settlement of the upper building and ensure the smooth operation of the underground passage.
Drawings
FIG. 1 is a schematic representation of a subterranean passageway after completion of steps 1 and 2;
FIG. 2 is a schematic representation of the underpass when it has completed step 3;
FIG. 3 is a schematic representation of the underpass when it has completed step 4;
FIG. 4 is a schematic representation of the underpass when it has completed step 5;
FIG. 5 is a schematic view of the underground passage during step 6
Fig. 6 is a schematic view of the underpinning structure of the pile foundation as seen in the direction of extension of the underpinning structure during construction of the upper half of the underpinning structure;
FIG. 7 is an enlarged partial schematic view at A of FIG. 6;
fig. 8 is a partially enlarged schematic view at B of fig. 7;
FIG. 9 is a schematic view of the cross-section of FIG. 6 with the booster rod in a deployed state;
FIG. 10 is an enlarged partial schematic view at D of FIG. 9;
FIG. 11 is the cross-section of FIG. 6 with the booster bars folded over the pour tube and without the roof bars inserted;
FIG. 12 is a partially enlarged schematic view at E of FIG. 11
Fig. 13 is a schematic view of the underpinning structure of the pile foundation as seen in the direction of extension of the underpinning underground passageway with the first row of piles being completed and without interruption;
fig. 14 is a schematic cross-sectional view C-C of fig. 13.
In the figure: working well 1, distance L from first row of pile foundations of superstructure, first section blank channel 2, first section blank channel part channel dado frame 3, first row of pile foundations 4, superstructure 5, second row of pile foundations 6, second section blank channel 7, first section pile foundation part blank channel upper half 8, soil 9 retained at lower part of first row of pile foundations, upper half 10 of pile foundation underpinning structure, second section blank channel part dado frame 11, lower half 13 of pile foundation underpinning structure, pile foundation underpinning structure 14, metal surface layer 15, outer hem 16, soil 12 at upper half of first row pile foundation part blank channel, pouring cavity 17, pouring pipe 18, concrete outflow port 19, pouring pipe input port 20, concrete layer 21, hanging hole 22, booster rod 23, shaft pin 24, via hole 25, push rod 26, ejector rod 27, groove 28, concrete bump 29, steel claw 30, concrete, The power-assisted rod part comprises a power-assisted rod part inlet 31, a steel claw connecting through hole 32, a blowing hole 33, a plastic film 34, a cavity 35, a barb 36, an end plate 37, a supporting ring 38, a connecting rib 39, a round connecting pin 40, a rubber sealing ring 41, a conical surface section 42/steel claws 43 distributed along the radial direction of a shaft pin and steel claws 44 distributed along the axial direction of the shaft pin.
Detailed Description
The invention is further illustrated with reference to the figures and the specific embodiments.
Referring to fig. 1 to 5, 1, an up-down separately digging type construction method of an underground passage crossing under an upper building pile foundation includes the following steps 1, two working wells 1 located at both ends of the underground passage of a building at the position of the underground passage; 2. excavating to a position which is away from a first row of pile foundations of an upper building by a working well according to the full section of the height of the underground passage by a working well, wherein the distance L is D to form a first section of blank passage 2, and pouring a first section of blank passage part passage dado frame 3 in the first section of blank passage, wherein D is larger than the size of the pile foundations along the extension direction of the underground passage (namely the left and right direction in figure 1); 3. on the premise of retaining the soil body at the lower part of the first row of pile foundations 4, continuously excavating to a position which is away from the second row of pile foundations 6 of the upper building 5 by a distance D to form a second section of blank channel 7 and an upper half part 8 of the first row of pile foundation part blank channel, wherein the strength of the soil body 9 retained at the lower part of the first row of pile foundations can meet the pile foundation embedment requirement; 4. pouring an upper half part 10 of a pile foundation underpinning structure in the upper half part of a first row of pile foundation part blank channels to support first row pile foundations and pouring a second section of blank channel part channel retaining wall frame 11 in a second section of blank channels, and pouring the first section of blank channel part channel retaining wall frame, the upper half part of the pile foundation underpinning structure and the second section of blank channel part channel retaining wall frame together to support the first row pile foundations; 5. cutting off the part of the first row of pile foundations in the first row of pile foundation part blank channels, digging away soil body remained at the lower part of the first row of pile foundations to form a first row of pile foundation part blank channel lower half part, pouring a lower half part 13 of a pile foundation underpinning structure in the first row of pile foundation part blank channel lower half part, forming the first row of pile foundation part blank channels by the upper half part of the first row of pile foundation part blank channels and the lower half part of the first row of pile foundation part blank channels, and enclosing the upper half part of the pile foundation underpinning structure and the lower half part of the pile foundation underpinning structure together to form a pile foundation underpinning structure 14; 6. and 3, traversing all pile foundations of the upper building, which extend into the passage area, according to the methods in the steps 3 to 5 to complete the construction of the whole underground passage.
Referring to fig. 6 to 14, the specific process of step 4 is: 4.1, install the arched metal surface course 15 that forms by the steel sheet preparation in first row pile foundation portion blank passageway first half 8, the one end of metal surface course is in the same place with first section blank passageway dado frame seal butt joint, the other end is equipped with outer hem 16, first section blank passageway dado frame, the metal surface course, outer hem and first row pile foundation portion blank passageway first half's soil body 12 encloses out pours the chamber 17, the metal surface course is located pours the chamber one side be fixed with a plurality of pipes 18 of pouring that distribute along metal surface course circumference on the surface, it is the metal pipe to pour the pipe. The pouring pipe extends along the extension direction of the underground passage, a plurality of dry concrete outflow ports 19 are arranged on the peripheral surface of the pouring pipe, and an input port 20 of the pouring pipe is positioned at one end of the pouring pipe, which is far away from the passage retaining wall frame of the first section of the blank passage part; 4.2, concrete enters the pouring cavity through an input port of the pouring pipe, the building pipe and a concrete outflow port in sequence to form a concrete layer 21, the concrete layer pours the metal surface layer, the soil body on the upper half part of the first row of pile foundation part blank channel and the first section blank channel part channel retaining wall framework together, and the metal surface layer forms a pouring mold and a mold support in the process of pouring the concrete into the pouring cavity; 4.3, pouring a second section of blank channel part channel protecting wall frame; the end face of the first section of blank channel part channel retaining wall frame is provided with a plurality of hanging holes 22, one end of the pouring pipe is hung in the hanging holes, and the other end of the pouring pipe is poured in the second section of blank channel part channel retaining wall frame. The pouring pipe is provided with a plurality of assistance rods 23 distributed along the extending direction of the pouring pipe, one end of each assistance rod is hinged with the pouring pipe through a shaft pin 24, the shaft pin is perpendicular to the pouring pipe, the pouring pipe is provided with a through hole 25 for the access of one end of each assistance rod connected with the pouring pipe, and one end of each assistance rod connected with the pouring pipe is provided with a push rod 26 positioned in the pouring pipe; when the boosting rod rotates to be folded on the pouring pipe by taking the shaft pin as the shaft, the push rod is blocked in the pouring pipe, and the boosting rod is positioned in the pouring cavity and outside the pouring pipe; before the concrete is poured into the pouring cavity, the ejector rod 27 is inserted into the pouring pipe to eject the ejector rod, the ejector rod drives the boosting rod to rotate by taking the shaft pin as a shaft, so that the boosting rod and the pouring pipe are separated into the soil body inserted into the upper half part of the blank channel of the first row of pile foundation parts. When the power-assisted rod is unfolded, a groove 28 is formed in the soil body of the upper half part of the first row of the soil body of the first row of the pile foundation part blank channel, and concrete is also injected into the groove to form a concrete bump 29. Be equipped with a plurality of steel claws 30 on helping hand pole's the surface, when helping hand pole separates to insert first row pile foundation portion blank passageway first half's soil body with pouring the pipe, have the steel claw to be located first row pile foundation portion blank passageway first half's soil body (this embodiment is that the steel claw is whole to be located first row pile foundation portion blank passageway first half's soil body). The boosting rod is a blind pipe structure with an inlet 31 of the boosting rod part arranged at one end connected with the pouring pipe, the steel claws are arranged in four rows, the steel claws in the same row of steel claws are distributed along the extending direction of the boosting rod, the four rows of steel claws are distributed along the circumferential direction of the boosting rod, the distribution direction of the two rows of steel claws is vertical to the distribution direction of the other two rows of steel claws, the two rows of steel claws are distributed along the radial direction of the shaft pin, the other two rows of steel claws are distributed along the axial direction of the shaft pin, the steel claws 43 distributed along the radial direction of the shaft pin are fixedly connected with the boosting rod, the boosting rod is provided with two rows of steel claw connecting through holes 32 distributed along the axial direction of the shaft pin, the two rows of steel claws distributed along the axial direction of the shaft pin are correspondingly and telescopically penetrated in the steel claw connecting through holes, the ejector rod is a blind pipe structure with one end closed and the other end opened towards one end of the channel part protective wall frame of the first section, the ejector rod is provided with a plurality of air blowing holes 33 which can be aligned with the inlets of the boosting rod part one to one, when the air blowing hole is aligned with the inlet of the power-assisted rod part, the air blowing hole is in sealed butt joint with the inlet of the power-assisted rod part; when the boosting rod is folded on the pouring pipe, the steel claws in the two rows of steel claws axially distributed along the shaft pin are contracted in the boosting rod; and after the ejector rod drives the boosting rod to rotate by taking the shaft pin as a shaft and separate from the pouring pipe, air is blown into the ejector rod to enable the air pressure in the boosting rod to rise to push the two rows of steel claws 44 axially distributed along the shaft pin out of the boosting rod, the ejector rod is pulled out, and concrete is injected into the pouring cavity through the pouring pipe and into a scratch groove formed in a soil body when the boosting rod swings. Two plastic films 34 are arranged in the power-assisted rod, the peripheries of the plastic films are connected with the inner surface of the power-assisted rod in a sealing mode to form two cavities 35 disconnected with the inner space of the power-assisted rod, and the inner ends of the two rows of steel claws distributed along the axial direction of the shaft pin are located in the two cavities in a one-to-one correspondence mode. The inner ends of the steel claws axially distributed along the shaft pin are provided with barbs 36 for preventing the steel claws from falling off the boosting rod. The ejector rod is of a metal round tube structure. Both ends of ejector pin rotate to be supported on pouring the pipe, specifically: the end plate 37 is arranged at one end, away from the first section blank channel part channel protective wall framework, of the pouring pipe, the supporting ring 38 is arranged at the other end of the pouring pipe, the supporting ring is connected to the inner surface of the pouring pipe through the connecting rib 39, the input port of the pouring pipe is eccentrically arranged on the end plate and is circular, the circular connecting pin 40 penetrating through the supporting ring is arranged at one end of the ejector rod, the other end of the ejector rod penetrates through the input port of the pouring pipe, and the supporting circular hole, the supporting circular ring and the ejector rod are coaxial. A rubber sealing ring 41 which protrudes out of the ejector rod and extends along the circumferential direction of the air blowing hole is arranged on the outer circumferential surface of the part of the ejector rod provided with the air blowing hole; the ejector pin inserts the in-process of pouring the pipe, rubber seal and helping hand pole stagger with the one end of pouring union coupling, the whole outer peripheral face of ejector pin is spaced apart with the inner peripheral surface of pouring the pipe between, the whole outer peripheral face of ejector pin and helping hand pole are spaced apart with the one end of pouring union coupling between, the ejector pin inserts and pours the pipe and all with the pipe of pouring separately back to the helping hand pole of drive, rotate the ejector pin and make the gas hole align with helping hand pole portion import, when the gas hole aligns with helping hand pole portion import, help the pole with pour through between the one end of union coupling and the ejector pin rubber seal sealing connection together. Before the upper half part of the pile foundation underpinning structure is poured, a conical surface section 42 with a large upper end and a small lower end is formed on the first row of pile foundations, and the upper half part of the pile foundation underpinning structure and the conical surface section are poured together and surround the periphery of the conical surface section.
Claims (10)
1. An up-down separately digging type construction method of an underground passage crossing under an upper building pile foundation is characterized by comprising the following steps of 1, building a working well; 2. excavating to a position which is a distance D from a first row of pile foundations of an upper building through a working well according to the full section of the height of the underground passage to form a first section of blank passage, and pouring a first section of blank passage part passage dado frame in the first section of blank passage, wherein D is larger than the size of the pile foundations in the extension direction of the underground passage; 3. continuously excavating to a position which is away from a second row of pile foundations of an upper building by a distance D on the premise of retaining soil at the lower part of the first row of pile foundations to form a second section of blank channel and the upper half part of the first row of pile foundation part blank channel, wherein the strength of the soil retained at the lower part of the first row of pile foundations can meet the pile foundation embedment requirement; 4. pouring the upper half part of the pile foundation underpinning structure in the upper half part of the first row of pile foundation part blank channels to support the first row of pile foundations and pouring the second section of blank channel part channel dado frame in the second section of blank channels, and pouring the first section of blank channel part channel dado frame, the upper half part of the pile foundation underpinning structure and the second section of blank channel part channel dado frame together to support the first row of pile foundations; 5. cutting off the part of the first row of pile foundations in the first row of pile foundation part blank channels, digging away the soil body remained at the lower part of the first row of pile foundations to form the lower half part of the first row of pile foundation part blank channels, pouring the lower half part of the pile foundation underpinning structure in the lower half part of the first row of pile foundation part blank channels, forming the first row of pile foundation part blank channels by the upper half part of the first row of pile foundation part blank channels and the lower half part of the first row of pile foundation part blank channels, and enclosing the upper half part of the pile foundation underpinning structure and the lower half part of the pile foundation underpinning structure together to form the pile foundation underpinning structure; 6. and 3, traversing all pile foundations of the upper building, which extend into the passage area, according to the methods in the steps 3 to 5 to complete the construction of the whole underground passage.
2. The up-down separately digging type construction method for crossing an underground passage under an upper building pile foundation according to claim 1, wherein the specific process of the step 4 is: 4.1, installing an arched metal surface layer made of a steel plate in the upper half part of the first row of pile foundation part blank channel, wherein one end of the metal surface layer is in sealed butt joint with the first section of blank channel part channel retaining wall frame, the other end of the metal surface layer is provided with an outer folded edge, the first section of blank channel part channel retaining wall frame, the metal surface layer, the outer folded edge and the soil body of the upper half part of the first row of pile foundation part blank channel enclose a pouring cavity, a plurality of pouring pipes distributed along the circumferential direction of the metal surface layer are fixed on the surface of the metal surface layer on one side of the pouring cavity, the pouring pipes extend along the extension direction of the underground channel, a plurality of dry mixed concrete outflow ports are arranged on the circumferential surface of the pouring pipes, and the input ports of the pouring pipes are positioned at one end of the pouring pipes, which is far away from the first section of blank channel part channel retaining wall frame; 4.2, concrete enters the pouring cavity through the input port of the pouring pipe, the building pipe and the concrete outlet in sequence to form a concrete layer, the concrete layer pours the metal surface layer, the soil body on the upper half part of the first row of pile foundation part blank channel and the first section blank channel part channel retaining wall framework together, and the metal surface layer forms a pouring mold and a mold support in the process of pouring the concrete into the pouring cavity; 4.3, pouring the second section of blank channel part channel protecting wall frame; the end face of the first section of blank channel part channel retaining wall frame is provided with a plurality of hanging holes, one end of the pouring pipe is hung in the hanging holes, and the other end of the pouring pipe is poured in the second section of blank channel part channel retaining wall frame.
3. The up-down separately digging type construction method of underground passage crossing under the upper building pile foundation according to claim 2, characterized in that, a plurality of boosting rods distributed along the extending direction of the pouring tube are arranged on the pouring tube, one end of the boosting rods is hinged with the pouring tube through a shaft pin, the shaft pin is perpendicular to the pouring tube, the pouring tube is provided with a through hole for the inlet and outlet of the end of the boosting rod connected with the pouring tube, and the end of the boosting rod connected with the pouring tube is provided with a push rod positioned in the pouring tube; when the boosting rod rotates to be folded on the pouring pipe by taking the shaft pin as the shaft, the push rod is blocked in the pouring pipe, and the boosting rod is positioned in the pouring cavity; before the concrete is poured into the pouring cavity, the ejector rod is inserted into the pouring pipe to eject the ejector rod, the ejector rod drives the boosting rod to rotate by taking the shaft pin as a shaft, so that the boosting rod and the pouring pipe are separated into the soil body inserted into the upper half part of the blank channel of the first row of pile foundation parts.
4. The method as claimed in claim 3, wherein the auxiliary rod is provided with a plurality of steel claws on an outer surface thereof, and the auxiliary rod is separated from the casting pipe into the soil inserted into the upper half of the green tunnel of the first row of pile foundation part, and the steel claws are located in the soil of the upper half of the green tunnel of the first row of pile foundation part.
5. The up-down separately digging type construction method of underground passage crossing under the upper building pile foundation according to claim 4, characterized in that the boosting rod is a blind pipe structure with an inlet of boosting rod part at one end connected with the pouring pipe, the steel claws have four rows, the steel claws in the same row of steel claws are distributed along the extending direction of the boosting rod, the four rows of steel claws are distributed along the circumferential direction of the boosting rod, the distribution direction of the two rows of steel claws is perpendicular to the distribution direction of the other two rows of steel claws, the two rows of steel claws are distributed along the radial direction of the shaft pin, the other two rows of steel claws are distributed along the axial direction of the shaft pin, the steel claws distributed along the radial direction of the shaft pin are fixedly connected with the boosting rod, the boosting rod is provided with two rows of steel claw connecting through holes distributed along the axial direction of the shaft pin, the two rows of steel claws distributed along the axial direction of the shaft pin are correspondingly and telescopically inserted into the steel claw connecting through holes, the top rod is a blind pipe structure with one end closed and the other end opened towards one end of the passage protecting wall frame of the first section blank passage, the top rod is provided with a plurality of air blowing holes which can be aligned with the inlets of the boosting rod parts on all the boosting rods in a one-to-one correspondence manner, and when the air blowing holes are aligned with the inlets of the boosting rod parts, the air blowing holes are in sealed butt joint with the inlets of the boosting rod parts; when the boosting rod is folded on the pouring pipe, the steel claws in the two rows of steel claws axially distributed along the shaft pin are contracted in the boosting rod; and after the ejector rod drives the boosting rod to rotate by taking the shaft pin as a shaft and separate from the pouring pipe, air is blown into the ejector rod to enable the air pressure in the boosting rod to rise to push the two rows of steel claws distributed along the axial direction of the shaft pin out of the boosting rod, the ejector rod is pulled out, and concrete is injected into the pouring cavity through the pouring pipe and into a scratch groove formed in a soil body when the boosting rod swings.
6. The up-down separately digging type construction method for crossing the underground passage under the upper building pile foundation according to claim 5, characterized in that two plastic films are arranged in the boosting rod, the peripheries of the plastic films are hermetically connected with the inner surface of the boosting rod to form two cavities disconnected with the inner space of the boosting rod, and the inner ends of two rows of steel claws axially distributed along the shaft pin are positioned in the two cavities one by one.
7. The up-down separately digging type construction method of underground passage crossing under the upper building pile foundation according to claim 5 or 6, characterized in that the inner ends of the steel claws distributed along the axial direction of the shaft pin are provided with barbs preventing the steel claws from coming out of the booster rod.
8. The up-down separately digging type construction method of underground passage crossing under the upper building pile foundation according to claim 5 or 6, characterized in that, two ends of the ejector rod are rotatably supported on the pouring pipe, and a rubber seal ring protruding from the ejector rod and extending along the circumferential direction of the air blowing hole is arranged on the outer circumferential surface of the part of the ejector rod where the air blowing hole is arranged; the ejector pin inserts the in-process of pouring the pipe, rubber seal and helping hand pole stagger with the one end of pouring union coupling, the whole outer peripheral face of ejector pin is spaced apart with the inner peripheral surface of pouring the pipe between, the whole outer peripheral face of ejector pin and helping hand pole are spaced apart with the one end of pouring union coupling between, the ejector pin inserts and pours the pipe and all with the pipe of pouring separately back to the helping hand pole of drive, rotate the ejector pin and make the gas hole align with helping hand pole portion import, when the gas hole aligns with helping hand pole portion import, help the pole with pour through between the one end of union coupling and the ejector pin rubber seal sealing connection together.
9. The up-down separately digging type construction method of underground passage crossing under the upper building pile foundation according to claim 8, characterized in that one end of the casting pipe far away from the first section of the blank passage portion passage guard wall frame is provided with an end plate, the other end is provided with a supporting ring, the supporting ring is connected on the inner surface of the casting pipe through a connecting rib, the input port of the casting pipe is eccentrically arranged on the end plate, one end of the ejector rod is provided with a circular connecting pin penetrating in the supporting ring, the other end is penetrated in the input port of the casting pipe, and the supporting circular hole, the supporting ring and the ejector rod are coaxial.
10. A method of divided up and down excavation construction of an underground passageway through an underground passageway beneath an upper building pile foundation according to claim 1, 2, 3, 4, 5 or 6, wherein a tapered section is formed in the pile foundation with a larger upper end and a smaller lower end, and the upper part of the underpinning structure is cast with and around the tapered section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110809090.9A CN113846671B (en) | 2021-07-16 | 2021-07-16 | Up-down separately digging type construction method for underground passage crossing under upper building pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110809090.9A CN113846671B (en) | 2021-07-16 | 2021-07-16 | Up-down separately digging type construction method for underground passage crossing under upper building pile foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113846671A true CN113846671A (en) | 2021-12-28 |
| CN113846671B CN113846671B (en) | 2023-01-06 |
Family
ID=78975182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110809090.9A Active CN113846671B (en) | 2021-07-16 | 2021-07-16 | Up-down separately digging type construction method for underground passage crossing under upper building pile foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113846671B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818502A (en) * | 2021-07-16 | 2021-12-21 | 中铁二院华东勘察设计有限责任公司 | Underpinning method for pile foundation with lower end located in underground passage |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB814302A (en) * | 1955-11-22 | 1959-06-03 | Pynford Ltd | Improvements in or relating to the underpinning of buildings |
| CN101187210A (en) * | 2007-10-17 | 2008-05-28 | 中铁十八局集团有限公司 | Metro engineering pile foundation underpinning construction method |
| CN105350589A (en) * | 2015-12-01 | 2016-02-24 | 中铁建工集团有限公司 | Underpinning construction method for pile foundation crossing existing protective building structure |
| CN107740446A (en) * | 2017-10-16 | 2018-02-27 | 广州地铁设计研究院有限公司 | Combined construction method of the passive supplement in existing building basis with underpining system in hole |
| CN108978673A (en) * | 2018-07-23 | 2018-12-11 | 河南工业大学 | A kind of foundation pit supporting construction and construction method of viaduct pile foundation underpinning |
| CN113818502A (en) * | 2021-07-16 | 2021-12-21 | 中铁二院华东勘察设计有限责任公司 | Underpinning method for pile foundation with lower end located in underground passage |
-
2021
- 2021-07-16 CN CN202110809090.9A patent/CN113846671B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB814302A (en) * | 1955-11-22 | 1959-06-03 | Pynford Ltd | Improvements in or relating to the underpinning of buildings |
| CN101187210A (en) * | 2007-10-17 | 2008-05-28 | 中铁十八局集团有限公司 | Metro engineering pile foundation underpinning construction method |
| CN105350589A (en) * | 2015-12-01 | 2016-02-24 | 中铁建工集团有限公司 | Underpinning construction method for pile foundation crossing existing protective building structure |
| CN107740446A (en) * | 2017-10-16 | 2018-02-27 | 广州地铁设计研究院有限公司 | Combined construction method of the passive supplement in existing building basis with underpining system in hole |
| CN108978673A (en) * | 2018-07-23 | 2018-12-11 | 河南工业大学 | A kind of foundation pit supporting construction and construction method of viaduct pile foundation underpinning |
| CN113818502A (en) * | 2021-07-16 | 2021-12-21 | 中铁二院华东勘察设计有限责任公司 | Underpinning method for pile foundation with lower end located in underground passage |
Non-Patent Citations (2)
| Title |
|---|
| 丁红军等: "地铁盾构隧道桩基托换施工技术研究", 《隧道建设》 * |
| 张继清: "北京地铁5号线蒲―天区间的桩基托换施工设计", 《现代城市轨道交通》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818502A (en) * | 2021-07-16 | 2021-12-21 | 中铁二院华东勘察设计有限责任公司 | Underpinning method for pile foundation with lower end located in underground passage |
| CN113818502B (en) * | 2021-07-16 | 2023-01-06 | 中铁二院华东勘察设计有限责任公司 | Underpinning method for pile foundation with lower end located in underground passage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113846671B (en) | 2023-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111734420B (en) | Water-rich stratum shield underwater receiving method provided with tunnel portal mortar retaining wall | |
| CN105442532B (en) | Pile crown expands bored pile construction method | |
| CN111396067B (en) | Comprehensive shield steel sleeve receiving construction method in complex environment | |
| CN112502734B (en) | Construction method for water-rich sand layer shield zone connecting channel | |
| CN211874515U (en) | Secant pile waterproof curtain structure in underground excavation station hole under low headroom | |
| CN111101964B (en) | Construction method for blocking receiving tunnel portal by shield method | |
| CN111535328A (en) | Pit shaft type underground garage foundation pit supporting system in water-rich stratum and construction method | |
| CN113846671B (en) | Up-down separately digging type construction method for underground passage crossing under upper building pile foundation | |
| CN113818502B (en) | Underpinning method for pile foundation with lower end located in underground passage | |
| CN112412472B (en) | Pipe-jacking working well wall reverse-acting system in soft soil area and construction method and application thereof | |
| US6749372B2 (en) | Underground shell-pile continuous wall job practice and its special drill | |
| CN112502732A (en) | Construction method of shield tunnel of water-rich sand layer | |
| CN108978694B (en) | Accurate guidance grouting method for building waterproof curtain in tunnel | |
| CN111022068A (en) | Construction method for enabling pipe-jacking tunnel to penetrate existing building downwards and construction working face of construction method | |
| CN115596453A (en) | Micro-brush slope tunnel entering method for tunnel long-distance side to pass through accumulation body | |
| CN105113513A (en) | Anti-seepage foundation pit supporting structure and construction method | |
| CN112502717B (en) | Construction method for excavating connecting channels between shield sections of water-rich sand layer | |
| CN114592892A (en) | Implementation method for pulling out anchor cable of shield tunnel in steel sleeve in soft soil area | |
| CN110185046B (en) | Ground source well-digging horizontal connecting pipe construction method | |
| JP3091859B2 (en) | Piling method for shafts with openings at the top | |
| CN111236236A (en) | Construction method for directional grouting of solution space area | |
| KR102544641B1 (en) | A mold for making concrete guides for casing installation and column-type diaghragm wall construction method using the same | |
| CN112502733B (en) | Method for constructing water-rich sand layer shield zone connection channel hole entering | |
| CN216275792U (en) | Recoverable negative pressure injection type open caisson structure | |
| CN114575883B (en) | Decompression guide grouting method suitable for airtight stratum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |