CN112879026A - Temporary backrest support structure for rectangular pipe jacking construction and construction method thereof - Google Patents
Temporary backrest support structure for rectangular pipe jacking construction and construction method thereof Download PDFInfo
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- CN112879026A CN112879026A CN202110038215.2A CN202110038215A CN112879026A CN 112879026 A CN112879026 A CN 112879026A CN 202110038215 A CN202110038215 A CN 202110038215A CN 112879026 A CN112879026 A CN 112879026A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/03—Driving non-circular tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1093—Devices for supporting, advancing or orientating the machine or the tool-carrier
Abstract
The invention relates to the field of rectangular pipe jacking engineering, in particular to a temporary reclining support structure for rectangular pipe jacking construction and a construction method thereof, wherein the reclining support structure comprises a support pile foundation, a structural bottom plate, a rear reclining wall and a rib wall, the support pile foundation comprises a front row of support pile sections and a rear row of support pile sections, and the support pile sections comprise a crown beam and a plurality of support piles; the structural bottom plate is arranged above the supporting pile foundation, and the front end and the rear end of the structural bottom plate are respectively connected with the front row of supporting pile sections and the rear row of supporting pile sections; the rear wall is vertically arranged above the middle part of the structural bottom plate and is perpendicular to the structural bottom plate, the top of the rear end face of the rear wall is connected with the top of the rib wall, and the bottom of the rib wall is connected with the structural bottom plate and the crown beam of the rear row of supporting pile sections; the horizontal bearing capacity, the anti-overturning capacity and the anti-pulling bearing capacity of the whole structure are enhanced by connecting all the parts, the uneven settlement of the structure can be effectively controlled, and effective counter force is provided for pipe jacking initiation and jacking construction under the condition that an initiation well cannot be arranged due to condition limitation in rectangular pipe jacking construction.
Description
Technical Field
The invention relates to the field of rectangular pipe jacking engineering, in particular to a temporary reclining support structure in a rectangular pipe jacking method and a construction method, which can be applied to the situation that a conventional starting well cannot be arranged due to condition limitation in the rectangular pipe jacking construction, and provide effective counter force for pipe jacking starting and jacking construction.
Background
The rectangular pipe jacking starting construction mainly comprises the steps that a hydraulic jack supported on a foundation pit backseat is utilized to jack a pipe jacking pipe joint into the soil through a force transmission jacking iron and a guide rail, however, along with the increasing application of a rectangular pipe jacking method to underground space development of underground comprehensive pipe galleries, municipal street crossing channels, underground vehicle-driven tunnels, underground garages and the like, a plurality of rectangular pipe jacking projects are influenced by existing ground building (structure) structures, particularly node projects for downwards penetrating embankment-shaped soil body road sections of expressways, railways and the like, and starting well construction conditions are not met, so that the original rectangular pipe jacking machine starting idea is abandoned under the condition that the starting well construction is not met, a novel starting structure is sought, and a novel technology is provided for the development of the rectangular pipe jacking method in a wider field.
Limitation exists in starting well construction in the rectangular pipe jacking construction process: 1. along with the widening of the application field of the rectangular pipe jacking method, when the method is applied to urban underground engineering construction, the construction site in a city is usually narrow and small, and is influenced by limited sites and surrounding environments, so that the excavation condition of an originating well is difficult to meet; 2. when the rectangular pipe jacking machine needs to penetrate through high-grade roadbed dam-shaped soil bodies such as expressways, railways and the like, the construction conditions on site cannot meet the construction requirements of conventional starting wells.
Disclosure of Invention
In order to solve the problems, the invention aims to disclose the field of rectangular pipe jacking engineering, and particularly relates to a temporary reclining support structure for rectangular pipe jacking construction and a construction method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
a temporary backrest support structure for rectangular pipe jacking construction comprises a support pile foundation, a structural bottom plate, a rear backrest wall and a rib wall; the supporting pile foundation comprises a front row of supporting pile sections and a rear row of supporting pile sections which are arranged in parallel front and back, each row of supporting pile sections consists of a crown beam and a plurality of supporting piles, and the crown beam is connected to the tops of the supporting piles to connect the plurality of supporting piles into a whole; the structural bottom plate is arranged above the supporting pile foundation, and the front end and the rear end of the structural bottom plate are respectively connected with the front row of supporting pile sections and the rear row of supporting pile sections; the rear backup wall is vertically arranged above the middle part of the structural bottom plate and is perpendicular to the structural bottom plate, the top of the rear end face of the rear backup wall is connected with the top of the rib wall, and the bottom of the rib wall is connected with the structural bottom plate and the crown beams of the rear row of supporting pile sections, so that the rear backup wall is connected with the structural bottom plate.
Preferably, the support piles I of the front row of support pile sections are arranged at equal intervals, and the support piles II of the rear row of support pile sections are arranged in a jumping mode relative to the support piles I of the front row of support pile sections.
Preferably, a central connecting line of the support pile I of the front row of support pile section and the support pile II of the rear row of support pile section opposite to the support pile I is always parallel to the central axis of the pipe joint of the jacking pipe.
Preferably, the top of the back wall is provided with a hidden beam connected with the top of the rib wall.
Preferably, the rib wall is arranged on a central connecting line of the two opposite supporting piles I and II in the front row and the rear row, and is arranged at equal intervals on the vertical rear wall.
Preferably, additional steel bars are arranged at the intersection angle of the structural bottom plate and the rear wall.
Preferably, the lower surface of the structural bottom plate is provided with a cushion layer.
Preferably, the reclining support structure further comprises a rectangular pipe jacking starting device, wherein the rectangular pipe jacking starting device comprises a jacking guide rail, a reclining steel box, a main jacking oil cylinder, U-shaped jacking iron, annular jacking iron and a pipe jacking machine; the jacking guide rail is arranged on the upper surface of the structural bottom plate and is close to the bottom of the front end surface of the rear wall; and the rear leaning steel box, the main jacking oil cylinder, the U-shaped jacking iron, the annular jacking iron and the pipe jacking machine are sequentially arranged above the jacking guide rail, wherein the rear leaning steel box is arranged on the front end surface of the rear leaning wall.
A construction method for constructing a temporary reclining support structure through rectangular jacking pipes comprises the following steps:
s1, construction of a support pile foundation: according to the originating design requirement and the site construction condition of the rectangular jacking pipe, the number and the depth of supporting piles need to meet the design requirement and the structural stability calculation, the supporting piles are arranged at equal intervals, a supporting pile II of a supporting pile section in the rear row is arranged in a jumping mode relative to a supporting pile I of a supporting pile section in the front row, after the supporting piles reach the design strength, the pile top part is chiseled, a crown beam is arranged at the top, and the crown beam is effectively lapped with a reinforcing steel bar at the top of the supporting pile, so that the supporting piles are connected into a whole;
s2, construction of a structural bottom plate: determining the construction position and the size of a structural bottom plate according to the construction design requirement; arranging a cushion layer below the structural bottom plate according to site construction conditions; binding and erecting a bottom plate steel bar, embedding rear wall and rib plate steel bars at the same time, and pouring concrete; the arrangement of the structural bottom plate enables the front row of supporting pile sections and the rear row of supporting pile sections to be connected to form an integral structure, and enables the front row of supporting pile sections and the rear row of supporting pile sections to be stressed together;
s3, constructing the back wall: according to design requirements, reinforcing steel bars at the joint of the rear wall and the structural bottom plate are encrypted, and additional reinforcing steel bars are arranged at the intersection of the rear wall and the structural bottom plate; the top of the rear wall is provided with a hidden beam;
s4, rib wall construction: the rib wall and the back wall are synchronously cast to reduce the generation of construction joints, strengthen the structural integrity, and effectively connect the back wall, the structural bottom plate and the support pile foundation to form a rectangular pipe temporary back support structure;
s5, setting cushion blocks according to the thickness of the protective layer of the concrete when binding the steel bars, so as to ensure the straightness and perpendicularity of the bottom plate steel bars, the backing wall and the template of the ribbed slab; the cushion block is made of fine aggregate concrete, the strength grade of the cushion block is required to be ensured to be the same as that of concrete poured by the rear leaning support structure, at least 4 cushion blocks are arranged in the range of every square meter, and the position of the cushion block is checked in a set time period.
The invention has the beneficial effects that:
1. the temporary rear support structure for rectangular pipe jacking construction is formed by connecting four parts, namely a support pile foundation, a structural bottom plate, a rear support wall and a rib wall, into a whole, is simple in structure and easy to construct, can well play the strength performance of materials, can effectively enhance the horizontal bearing capacity, the anti-overturning capacity and the anti-pulling bearing capacity of the whole structure, and can effectively control the uneven settlement of the whole structure.
2. The temporary rear support structure for rectangular pipe jacking construction is used as technical supplement of the existing rectangular pipe jacking method construction, when the rectangular pipe jacking construction does not have initial well construction conditions or a pipe jacking machine needs to penetrate roadbed and dam-shaped soil bodies such as expressways and railways, a new solution is provided for the rectangular pipe jacking method construction, the assistance is expanded in a wider field in the rectangular pipe jacking method, and compared with the prior art, the structure saves the cost of large-area foundation pit excavation, support, water stopping and precipitation and the like, and has good economic benefit.
Drawings
FIG. 1 is a schematic side view of a rectangular jacking pipe temporary reclining support structure of the present invention;
FIG. 2 is a schematic diagram of a rectangular pipe jacking temporary reclining support structure and a rectangular pipe jacking originating device of the present invention;
FIG. 3 is a schematic top view of a rectangular jacking pipe temporary reclining support structure of the present invention;
FIG. 4 is a schematic front view of a rectangular jacking pipe temporary reclining support structure of the invention.
Reference is made to the accompanying drawings in which:
1-supporting pile foundation, 2-crown beam, 3-structural bottom plate, 4-back wall, 5-hidden beam, 6-rib wall, 7-supporting pile I, 8-supporting pile II, 9-jacking guide rail, 10-back steel box, 11-main jacking oil cylinder, 12-U-shaped jacking iron, 13-annular jacking iron, 14-pipe jacking machine, 15-pipe jacking pipe joint and 16-lining wall.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings:
the invention provides a temporary backrest support structure for rectangular pipe jacking construction, which comprises a supporting pile foundation 1, a structural bottom plate 3, a backrest wall 4 and a rib wall 6; the supporting pile foundation 1 comprises a front row of supporting pile sections and a rear row of supporting pile sections which are arranged in parallel front and back, each row of supporting pile sections consists of a crown beam 2 and a plurality of supporting piles, wherein the front row of supporting pile sections comprises the crown beam 2 and a supporting pile I7, and the rear row of supporting pile sections comprises the crown beam 2 and a supporting pile II 8;
the crown beam 2 is connected to the top of the support pile to enable a plurality of support piles to be connected into a whole, so that the common support effect of the support piles is ensured; the structural bottom plate 3 is arranged above the supporting pile foundation 1, and the front end and the rear end of the structural bottom plate are respectively connected with the front row of supporting pile sections and the rear row of supporting pile sections to form a whole, so that the common stress effect is ensured;
the rear leaning wall 4 is vertically arranged above the middle part of the structural bottom plate 3 and is perpendicular to the structural bottom plate 3, the top of the rear end face of the rear leaning wall 4 is connected with the top of the rib wall 6, the bottom of the rib wall 6 is connected with the structural bottom plate 3 and the crown beam 2 of the rear row of supporting pile sections, so that the rear leaning wall 4 is connected with the structural bottom plate 3, the rear leaning wall 4 directly receives the pushing counter force from the jack, and the force is finally transmitted to the supporting piles through the bottom plate;
the back rest support structure is connected with the rib wall 6 into a whole through the supporting pile foundation 1, the structure bottom plate 3, the back rest wall 4 and the rib wall, the back rest wall 4 directly bears the pushing counterforce from a jack and finally transfers the load to the supporting pile foundation 1 through the structure bottom plate 3, and all parts are connected with each other, so that the horizontal bearing capacity, the anti-overturning capacity and the anti-pulling bearing capacity of the whole structure are enhanced, the uneven settlement of the structure can be effectively controlled, and effective counterforce can be provided for pipe jacking starting and jacking construction under the condition that a starting well cannot be set due to condition limitation in rectangular pipe jacking construction;
in the embodiment, the supporting piles I7 of the front row of supporting pile sections are arranged at equal intervals, so that the uniform stress is ensured; the supporting piles II 8 of the supporting pile sections in the rear row are arranged in a jumping mode relative to the supporting piles I7 of the supporting pile sections in the front row; a central point connecting line of a supporting pile I7 of the front row of supporting pile sections and a supporting pile II 8 of the rear row of supporting pile sections opposite to the supporting pile I is always parallel to the central axis of the pipe joint 15 of the jacking pipe;
the top of the rear wall 4 is provided with a hidden beam 5 connected with the top of the rib wall 6, the rigid connection between the rear wall 4 and the rib wall 6 is strengthened, and the horizontal resistance of the rear wall 4 is strengthened; the rib walls 6 are arranged on central connecting lines of the two supporting piles I7 and II which are opposite in the front row and the rear row and are perpendicular to the rear wall 4 and arranged at equal intervals; the bottom of the rib wall 6 is connected with the structural bottom plate 3 and the top crown beam 2 of the rear row supporting pile section, and the top of the rib wall 6 is connected with the hidden beam 5 at the top of the back rest wall 4, so that the back rest support structure is connected into a whole, and the back rest wall 4 is ensured not to be damaged by shearing force;
additional steel bars are arranged at the intersection angle of the structural bottom plate 3 and the rear wall 4; the lower surface of the structural bottom plate 3 is provided with a cushion layer, so that the thickness of the bottom plate is properly increased, and the overall stability is improved;
the reclining support structure further comprises a rectangular push pipe starting device, wherein the rectangular push pipe starting device comprises a jacking guide rail 9, a reclining steel box 10, a main jacking oil cylinder 11, a U-shaped jacking iron 12, an annular jacking iron 13 and a push bench 14; the jacking guide rail 9 is arranged on the upper surface of the structural bottom plate 3 and is close to the bottom of the front end surface of the rear wall 4; and the rear leaning steel box 10, the main jacking oil cylinder 11, the U-shaped jacking iron 12, the annular jacking iron 13 and the pipe jacking machine 14 are sequentially arranged above the jacking guide rail 9, wherein the rear leaning steel box 10 is arranged on the front end surface of the rear leaning wall 4 to form a rectangular pipe jacking starting device.
A construction method for constructing a temporary reclining support structure through rectangular jacking pipes comprises the following steps:
s1, construction of a support pile foundation 1: according to the originating design requirement and the site construction condition of the rectangular jacking pipe, the number and the depth of supporting piles need to meet the design requirement and the structural stability calculation, the supporting piles are arranged at equal intervals, the supporting piles II 8 of the supporting pile section in the rear row are arranged in a jumping mode relative to the supporting piles I7 of the supporting pile section in the front row, after the supporting piles reach the design strength, the pile top part is chiseled, the top is provided with a crown beam 2, and the crown beam 2 is effectively lapped with reinforcing steel bars at the top of the supporting piles, so that the supporting piles are connected into a whole;
s2, construction of the structural bottom plate 3: determining the construction position and the size of the structural bottom plate 3 according to the construction design requirement; according to the site construction conditions, a cushion layer is arranged below the structural bottom plate 3; binding and erecting the reinforcing steel bars of the bottom plate, embedding the rear wall 4 and the reinforcing steel bars of the rib plate at the same time, and pouring concrete; the arrangement of the structural bottom plate 3 enables the front row of supporting pile sections and the rear row of supporting pile sections to be connected to form an integral structure, and enables the front row of supporting pile sections and the rear row of supporting pile sections to be stressed together;
s3, constructing the back wall 4: according to design requirements, reinforcing steel bars at the joint of the rear wall 4 and the structural bottom plate 3 are encrypted, and additional reinforcing steel bars are arranged at the intersection of the rear wall 4 and the structural bottom plate 3, so that cracks and local damage caused by the pushing reaction force at the intersection of the rear wall 4 and the structural bottom plate 3 are prevented; the top of the rear wall 4 is provided with a hidden beam 5, so that the rigid connection with the rib wall 6 is enhanced, and the integral stability of the rear wall 4 is improved;
s4, rib wall 6 construction: the rib wall 6 and the back wall 4 are cast synchronously to reduce the construction joints and enhance the structural integrity, and the rib wall 6 is arranged to effectively connect the back wall 4, the structural bottom plate 3 and the support pile foundation 1 to form a rectangular pipe temporary back support structure; meanwhile, the rib wall 6 connects the rear wall 4 with the structural bottom plate 3, so that a good reinforcement effect can be achieved, the stress condition of the rear wall 4 and the structural bottom plate is improved, the rigidity and integrity of the structure are improved, and the deformation of the rear wall 4 is reduced;
s5, setting cushion blocks according to the thickness of the protective layer of the concrete when binding the steel bars so as to ensure the straightness and perpendicularity of the bottom plate steel bars, the back wall 4 and the template of the ribbed slab; the cushion block is made of fine aggregate concrete, the strength grade of the cushion block is required to be ensured to be the same as that of concrete poured by the rear leaning support structure, at least 4 cushion blocks are arranged in the range of every square meter, and the position of the cushion block is checked in a set time period.
The above embodiments are only preferred embodiments of the present invention, and not intended to limit the technical scope of the present invention, and those skilled in the art may make modifications and variations within the spirit of the present invention, and all modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (9)
1. A temporary backrest support structure for rectangular pipe jacking construction is characterized by comprising a supporting pile foundation, a structure bottom plate, a rear backrest wall and a rib wall; the supporting pile foundation comprises a front row of supporting pile sections and a rear row of supporting pile sections which are arranged in parallel front and back, each row of supporting pile sections consists of a crown beam and a plurality of supporting piles, and the crown beam is connected to the tops of the supporting piles to connect the plurality of supporting piles into a whole; the structural bottom plate is arranged above the supporting pile foundation, and the front end and the rear end of the structural bottom plate are respectively connected with the front row of supporting pile sections and the rear row of supporting pile sections; the rear backup wall is vertically arranged above the middle part of the structural bottom plate and is perpendicular to the structural bottom plate, the top of the rear end face of the rear backup wall is connected with the top of the rib wall, and the bottom of the rib wall is connected with the structural bottom plate and the crown beams of the rear row of supporting pile sections, so that the rear backup wall is connected with the structural bottom plate.
2. The temporary support structure for the jacking construction of the rectangular pipe jacking according to claim 1, wherein the supporting piles I of the front row of supporting pile sections are arranged at equal intervals, and the supporting piles II of the rear row of supporting pile sections are arranged in a jumping manner relative to the supporting piles I of the front row of supporting pile sections.
3. The temporary support structure for the jacking pipe construction according to claim 2, wherein a central connecting line of a support pile I of the front row of support pile sections and a support pile II of the rear row of support pile sections opposite to the support pile I is always parallel to a central axis of the jacking pipe joint.
4. The rectangular pipe jacking temporary reclining support structure of claim 1, wherein the top of said reclining wall is provided with hidden beams connected with the top of rib wall.
5. The temporary post-support structure for rectangular pipe jacking construction according to claim 2, wherein the rib walls are arranged on the central connecting lines of the two opposite supporting piles I and II in the front row and the rear row, and the vertical post-support walls are arranged at equal intervals.
6. The rectangular pipe jacking temporary reclining support structure according to claim 1, wherein additional reinforcing steel bars are provided at the intersection corners of the structural bottom plate and the reclining wall.
7. The rectangular pipe jacking temporary reclining support structure according to claim 1, wherein a cushion layer is provided on a lower surface of the structural bottom plate.
8. The temporary backrest support structure for rectangular pipe jacking construction according to claim 1, further comprising a rectangular pipe jacking initiating device, wherein the rectangular pipe jacking initiating device comprises a jacking guide rail, a backrest steel box, a main jacking cylinder, U-shaped jacking iron, annular jacking iron and a pipe jacking machine; the jacking guide rail is arranged on the upper surface of the structural bottom plate and is close to the bottom of the front end surface of the rear wall; and the rear leaning steel box, the main jacking oil cylinder, the U-shaped jacking iron, the annular jacking iron and the pipe jacking machine are sequentially arranged above the jacking guide rail, wherein the rear leaning steel box is arranged on the front end surface of the rear leaning wall.
9. A construction method of a rectangular pipe jacking temporary reclining support structure according to any one of claims 1 to 8, comprising the steps of:
s1, construction of a support pile foundation: according to the originating design requirement and the site construction condition of the rectangular jacking pipe, the number and the depth of supporting piles need to meet the design requirement and the structural stability calculation, the supporting piles are arranged at equal intervals, a supporting pile II of a supporting pile section in the rear row is arranged in a jumping mode relative to a supporting pile I of a supporting pile section in the front row, after the supporting piles reach the design strength, the pile top part is chiseled, a crown beam is arranged at the top, and the crown beam is effectively lapped with a reinforcing steel bar at the top of the supporting pile, so that the supporting piles are connected into a whole;
s2, construction of a structural bottom plate: determining the construction position and the size of a structural bottom plate according to the construction design requirement; arranging a cushion layer below the structural bottom plate according to site construction conditions; binding and erecting a bottom plate steel bar, embedding rear wall and rib plate steel bars at the same time, and pouring concrete; the arrangement of the structural bottom plate enables the front row of supporting pile sections and the rear row of supporting pile sections to be connected to form an integral structure, and enables the front row of supporting pile sections and the rear row of supporting pile sections to be stressed together;
s3, constructing the back wall: according to design requirements, reinforcing steel bars at the joint of the rear wall and the structural bottom plate are encrypted, and additional reinforcing steel bars are arranged at the intersection of the rear wall and the structural bottom plate; the top of the rear wall is provided with a hidden beam;
s4, rib wall construction: the rib wall and the back wall are synchronously cast to reduce the generation of construction joints, strengthen the structural integrity, and effectively connect the back wall, the structural bottom plate and the support pile foundation to form a rectangular pipe temporary back support structure;
s5, setting cushion blocks according to the thickness of the protective layer of the concrete when binding the steel bars, so as to ensure the straightness and perpendicularity of the bottom plate steel bars, the backing wall and the template of the ribbed slab; the cushion block is made of fine aggregate concrete, the strength grade of the cushion block is required to be ensured to be the same as that of concrete poured by the rear leaning support structure, at least 4 cushion blocks are arranged in the range of every square meter, and the position of the cushion block is checked in a set time period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038215.2A CN112879026A (en) | 2021-01-12 | 2021-01-12 | Temporary backrest support structure for rectangular pipe jacking construction and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110038215.2A CN112879026A (en) | 2021-01-12 | 2021-01-12 | Temporary backrest support structure for rectangular pipe jacking construction and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446011A (en) * | 2021-07-28 | 2021-09-28 | 中建八局广西建设有限公司 | Rectangular pipe jacking counter-force device for subway entrance and exit channel and construction method |
| CN117646638A (en) * | 2024-01-30 | 2024-03-05 | 中铁二十二局集团轨道工程有限公司 | Force transmission construction method by using top pipe reaction frame of existing station main body structure |
-
2021
- 2021-01-12 CN CN202110038215.2A patent/CN112879026A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446011A (en) * | 2021-07-28 | 2021-09-28 | 中建八局广西建设有限公司 | Rectangular pipe jacking counter-force device for subway entrance and exit channel and construction method |
| CN117646638A (en) * | 2024-01-30 | 2024-03-05 | 中铁二十二局集团轨道工程有限公司 | Force transmission construction method by using top pipe reaction frame of existing station main body structure |
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