CN115199814A - Construction process for oblique jacking pipe receiving end - Google Patents
Construction process for oblique jacking pipe receiving end Download PDFInfo
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- CN115199814A CN115199814A CN202210851739.8A CN202210851739A CN115199814A CN 115199814 A CN115199814 A CN 115199814A CN 202210851739 A CN202210851739 A CN 202210851739A CN 115199814 A CN115199814 A CN 115199814A
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- Prior art keywords
- pipe
- jacking
- receiving well
- extension wall
- receiving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
Abstract
The invention discloses a construction process of an oblique-crossing pipe-jacking receiving end, wherein an extension wall is constructed firstly during construction, and a pipe jacking machine is used for performing ring-by-ring pipe jacking construction according to a normal pipe jacking process; then when the outermost ring of the push bench reaches the connecting line position of the extension wall and one end of the receiving well inlet, backfilling in the range enclosed by the connecting line of the extension wall and the other end of the receiving well inlet and the receiving well inlet; and finally, locking the oblique-crossing duct pieces at the end parts of the jacking pipes, and performing secondary grouting plugging on the extension walls and the end wall interface ring beams. The pipe jacking channel diagonal construction process can be used for pipe jacking channel construction under different diagonal conditions, and meets the requirements of building functions and peripheral condition limitation to the maximum extent. And the structural structure cannot be structurally damaged in the construction process, and the stress, the water resistance and the structural safety of the structure are not influenced. The secondary grouting system can fill the structural gap, and water leakage is further avoided.
Description
Technical Field
The invention relates to construction of an oblique-crossing jacking pipe, in particular to a construction process of a receiving end of the oblique-crossing jacking pipe.
Background
At present, most of the existing subway cross-street channel pipe-jacking construction processes are pipe-jacking construction processes in which an originating end wall and a receiving end wall are perpendicular to the axis direction of a channel, and few pipe-jacking construction processes in which the originating end wall and the receiving end wall of a pipe are oblique to the axis direction of the channel are available. However, with the development of subway construction and subway technology in China, the conditions of oblique intersection of the head wall at the initial end of the jacking pipe and the head wall at the receiving end of the jacking pipe and the axis direction of the channel of the jacking pipe are more and more likely to occur. The existing pipe jacking process is that the initial end wall and the receiving end wall are perpendicular to the axial direction of a channel, and when the functional requirements of building channels, building planning requirements, the limitation of existing surrounding building structures and underground pipelines and the requirement of making oblique pipe jacking channels are met, the existing orthogonal pipe jacking process has limitations.
In the prior art, a method for processing an oblique crossing receiving end by cutting segments is adopted, but the method for cutting segments can only aim at the condition that the partial small range of the last segment of segment invades an end wall under the condition of a small oblique crossing angle. And the local cutting of the precast concrete pipe-jacking segment can be used for damaging the structural structure and is not beneficial to the stress, the water resistance and the structural safety of the structure.
The scheme of the waste pipe jacking machine shell for cutting the pipe jacking shell is not economical, the connection part of the shell and the prefabricated pipe piece is a weak part, water is easy to leak, the difficult period of connection construction of the pipe jacking machine shell and the end wall is large, water is easy to leak in the later period, and particularly in a corrosive environment, the durability of the pipe jacking machine shell as a permanent structure has a problem.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the construction process of the oblique-crossing pipe-jacking receiving end of the pipe jacking by arranging the extension wall at the port of the oblique-crossing pipe-jacking receiving well, extending the oblique-crossing receiving well into a state vertical to the pipe jacking channel and then performing pipe jacking.
The technical scheme adopted by the invention for solving the technical problem is as follows: a construction process for a diagonal pipe-jacking receiving end comprises the following steps:
s1: constructing a top pipe initial well and a top pipe receiving well, and reinforcing the end of the top pipe receiving well;
s2: constructing an extension wall, and enabling a pipe jacking machine to carry out ring-by-ring pipe jacking construction according to a normal pipe jacking process;
s3: when the outermost ring of the push bench reaches the connecting line position of the extension wall and one end of the receiving well inlet, backfilling in the range enclosed by the connecting line of the extension wall and the other end of the receiving well inlet and the receiving well inlet;
s4: pushing pipe jacking pipe pieces, lifting out a pipe jacking machine head after pipe jacking construction is finished, and cleaning backfill soil in a pipe jacking receiving well;
s5: backfilling the sinking range of the top pipe receiving well bottom plate to the top elevation of the channel bottom plate;
s6: locking the oblique duct pieces at the end part of the top pipe;
s7: performing secondary grouting plugging on the extension wall and the end wall joint ring beam;
s8: and (4) carrying out concrete pouring construction on the structural top plate of the jacking pipe receiving well, and carrying out top plate earthing and backfilling to complete the construction of the whole jacking pipe channel structure.
As an improvement of the technical scheme, the receiving well is a special-shaped well, and the joint of the special-shaped receiving well and the jacking pipe channel is obliquely arranged relative to the jacking pipe channel.
As a further improvement of the technical scheme, the extension wall is constructed with a plurality of extension walls, and the plurality of extension walls are arranged at one end, close to the originating well, of the inclined receiving well inlet; and the extension wall extends to a position where a connecting line of the extension wall and the other end of the receiving well inlet is vertical to the pipe jacking channel.
As a further improvement of the technical scheme, the extension wall comprises a main extension wall parallel to the edge of the receiving well and an auxiliary extension wall arranged on the main extension wall.
As a further improvement of the technical scheme, an auxiliary extension wall extending towards the other end of the receiving well inlet is further arranged on the main extension wall, a post-pouring beam is further arranged between the auxiliary extension wall and the other end of the receiving well inlet, and the oblique-crossing duct pieces are locked through the auxiliary extension wall and the post-pouring beam.
As a further improvement of the technical scheme, the grouting positions during the secondary grouting comprise a position between the entrance of the receiving well and the jacking pipe sheet, a position between the main extension wall and the entrance of the receiving well and a position between the main extension wall and the auxiliary extension wall.
As a further improvement of the technical scheme, when backfilling is carried out in a range enclosed by a connecting line of the extension wall and the other end of the receiving well inlet and the receiving well inlet, waterproof paint is coated firstly, and then backfilling is carried out by adopting C20 plain concrete.
As a further improvement of the technical scheme, when backfilling is carried out in a range surrounded by a connecting line of the extension wall and the other end of the receiving well inlet and the receiving well inlet, slope-releasing backfilling is adopted, and synchronous grouting is carried out in the backfilling process.
The beneficial effects are that: the construction process for the oblique-crossing pipe-jacking receiving end has good adaptability, so that the construction process for the oblique crossing of the pipe-jacking channel can be used for pipe-jacking channel construction under different oblique crossing conditions, and the requirements of building functions and the limitation of peripheral conditions are met to the maximum extent. And the duct piece does not need to be cut in the construction process, the structural damage of the structure is avoided, and the stress, the water resistance and the structural safety of the structure are not influenced. And the setting of secondary slip casting system can effectually be connected and spacing prefabricated push pipe tube coupling, avoids using the casing as permanent structure to carry out the atress, does not have the casing to be connected with prefabricated section of jurisdiction, avoids this department to leak. And the secondary slip casting system can fill the structure gap, further avoiding leaking.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a flow chart of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive efforts are within the protection scope of the present invention based on the embodiments of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The technical characteristics in the invention can be combined interactively on the premise of not conflicting with each other.
Referring to fig. 1 and 2, the construction process of the oblique jacking pipe receiving end comprises the following steps:
s1: constructing a pipe jacking initial well and a pipe jacking receiving well, and reinforcing the end head of the pipe jacking receiving well;
the pipe jacking initial well and the pipe jacking receiving well are respectively positioned at two ends of the pipe jacking channel, the joint of the pipe jacking receiving well and the pipe jacking channel is a receiving well outlet, the pipe jacking machine can jack the pipe jacking pipe segments to the receiving well outlet, and the pipe jacking machine is hoisted out of the pipe jacking channel through the receiving well.
Different from the conventional receiving well which is horizontally arranged along the axis of the pipe jacking channel, the receiving well is a special-shaped well, and the joint of the special-shaped receiving well and the pipe jacking channel is obliquely arranged relative to the pipe jacking channel.
As an implementation mode of the scheme, the special-shaped receiving well is composed of a square space perpendicular to the axis of the pipe jacking channel and a special-shaped space formed by connecting the square space and the pipe jacking channel. When pipe jacking is carried out in the space, in order to avoid position deviation generated at the outlet of the receiving well when the pipe jacking machine pushes out the pipe jacking pipe piece, the outlet of the receiving well needs to be reinforced firstly. During reinforcement, a stirring pile can be arranged at the inlet of the receiving well, then steel rings are embedded at the two ends of the inlet of the receiving well, and special-shaped columns are arranged.
S2: constructing an extension wall, and enabling a pipe jacking machine to carry out ring-by-ring pipe jacking construction according to a normal pipe jacking process;
the plurality of extension walls are constructed and arranged at one end, close to the starting well, of the inclined receiving well inlet; and the extension wall extends to a position where a connecting line of the extension wall and the other end of the receiving well inlet is vertical to the pipe jacking channel. The extension wall includes a main extension wall parallel to an edge of the receiving well and an auxiliary extension wall provided on the main extension wall.
As an implementation mode of the scheme, the extension main extension wall is a first side wall, and the first side wall is parallel to the edge of the top pipe channel and is connected with a special-shaped column at the inlet of the receiving well. Therefore, the side wall forms the extension of the push pipe channel, the joint of the push pipe channel and the receiving well is changed into the connecting line of the end part of the first side wall and the other end of the push pipe channel, the length of the first side wall is adjusted, the connecting line of the end part of the extension section of the first side wall and the other end of the original receiving well is perpendicular to the axis of the push pipe channel, and a new non-oblique receiving well inlet is formed in the receiving well.
The extension wall further comprises a second side wall and a third side wall, and the second side wall and the third side wall can be connected between the first side wall and the second side wall of the push pipe originating well to support the first side wall and ensure the stability of the first side wall. Preferably, the side wall III is vertically arranged on the side wall I, and the side wall II is connected with the end part of the extending end of the side wall III at the end part of the extending end of the side wall I. Therefore, a triangular support is formed among the first side wall, the second side wall and the third side wall, and the stability of the whole extension wall is higher.
S3: when the outermost ring of the push bench reaches the connecting line position of the extension wall and one end of the receiving well inlet, backfilling in the range enclosed by the connecting line of the extension wall and the other end of the receiving well inlet and the receiving well inlet;
and a connecting line between the end part of the extension section of the first side wall and the other end of the original receiving well is vertical to the axis of the top pipe channel, so that a new non-oblique receiving well inlet is formed in the receiving well. However, as there is no soil between the entrance of the receiving well and the original entrance of the receiving well, the pipe jacking machine is easy to shift in the area when the pipe jacking continues. Therefore, when the push bench enters the position between the inlet of the new receiving well and the inlet of the original receiving well, the region needs to be backfilled first, so that the region is filled with solid soil as in the push bench channel.
As an implementation mode of the scheme, during backfilling, the backfilled soil and the first side wall are compacted and attached tightly to simulate the existing working condition of pipe jacking construction in the soil, meanwhile, synchronous grouting is utilized to guarantee the pipe jacking with the first side wall and the residual earthwork, the unbalance loading effect during pipe jacking construction hole discharging is avoided, stress balance of two sides is guaranteed, meanwhile, when a construction unit is constructed to the position, the pushing speed is paid attention to, the posture of the pipe jacking machine is controlled, and safety is guaranteed.
In order to ensure that the soil at the backfilling position can be as firm as the soil in the pipe jacking channel, waterproof paint is coated firstly when the extending wall is backfilled in the range enclosed by the connecting line of the other end of the receiving well inlet and the receiving well inlet, and C20 plain concrete is adopted for backfilling after the waterproof paint is coated. When backfilling is carried out in a range enclosed by the connecting line of the other ends of the extension wall and the receiving well inlet, slope-releasing backfilling is adopted, synchronous grouting is carried out in the backfilling process, the soil body after backfilling can be subjected to synchronous grouting to increase the strength of the soil body, the pressure of the backfilled soil body and the pressure of the soil body of a pipe-jacking channel can be kept constant, and unknown deviation of a pipe-jacking machine due to uneven stress in the pipe-jacking process is avoided.
S4: pushing pipe jacking pipe pieces, lifting out a pipe jacking machine head after pipe jacking construction is finished, and cleaning backfill soil in a pipe jacking receiving well;
after the extension wall and the backfill are arranged, the pipe jacking machine can continue to push pipes, and when the pipe jacking machine jacks the wellhead of the receiving well, due to the effects of the extension wall and the backfill soil, the pipe jacking machine can carry out pipe jacking just like vertically intersected pipe jacking at the pipe jacking ports until the pipe jacking machine jacks the port openings of the extension end of the extension wall and the other end of the receiving well, so that the pipe jacking process is completed.
After the pipe jacking machine completes pipe jacking in the receiving well, the pipe jacking machine needs to be hoisted out of the receiving well from the position of a new receiving well mouth, and at the moment, the extended position and pipe pieces of the pipe jacking machine can be further fixed and plugged after earth backfilled in the receiving well is cleaned up.
S5: backfilling the sinking range of the top pipe receiving well bottom plate to the top elevation of the channel bottom plate;
because the push bench is heavier, certain pressure can be caused to the bottom plate of the receiving well during push and hoisting, so that the bottom plate of the receiving well sinks. In order to plug the structure in the receiving well, the bottom plate of the receiving well and the pipe-jacking pipeline are required to be on the same horizontal line, so that the receiving well bottom plate which is pressed to sink needs to be backfilled first, and then the receiving well bottom plate is backfilled to the top elevation of the receiving well bottom plate and then is subjected to next treatment.
S6: locking the oblique duct pieces at the end part of the top pipe;
the main extension wall is further provided with an auxiliary extension wall extending towards the other end of the receiving well inlet, a post-pouring beam is further arranged between the auxiliary extension wall and the other end of the receiving well inlet, and the oblique duct pieces are locked through the auxiliary extension wall and the post-pouring beam.
S7: performing secondary grouting plugging on the extension wall and the end wall joint ring beam;
because the actual inlet of the receiving well is an extension area which is surrounded by the extension wall and one end of the original inlet of the receiving well, a certain gap exists between the extension position and the whole receiving well, and the positions are easy to loose, leak water and the like after the well head is plugged. Therefore, secondary grouting plugging needs to be performed on some special areas after the jacking pipe is finished. And the grouting position during secondary grouting comprises a position between the inlet of the receiving well and the jacking pipe sheet, a position between the main extension wall and the inlet of the receiving well and a position between the main extension wall and the auxiliary extension wall. The setting of secondary slip casting system can effectually be connected and spacing prefabricated push pipe coupling, fills the structure clearance, avoids leaking.
S8: and carrying out concrete pouring construction on the structural top plate of the jacking pipe receiving well, and carrying out top plate earthing and backfilling to complete the construction of the whole jacking pipe channel structure.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A construction process for a receiving end of an oblique jacking pipe is characterized by comprising the following steps: the method comprises the following steps:
s1: constructing a pipe jacking initial well and a pipe jacking receiving well, and reinforcing the end head of the pipe jacking receiving well;
s2: constructing an extension wall, and enabling a pipe jacking machine to carry out ring-by-ring pipe jacking construction according to a normal pipe jacking process;
s3: when the outermost ring of the push bench reaches the connecting line position of the extension wall and one end of the receiving well inlet, backfilling in the range enclosed by the connecting line of the extension wall and the other end of the receiving well inlet and the receiving well inlet;
s4: pushing pipe jacking pipe pieces, lifting out a pipe jacking machine head after pipe jacking construction is finished, and cleaning backfill soil in a pipe jacking receiving well;
s5: backfilling the sinking range of the top pipe receiving well bottom plate to the top elevation of the channel bottom plate;
s6: locking the oblique duct pieces at the end part of the top pipe;
s7: performing secondary grouting plugging on the extension wall and the end wall joint ring beam;
s8: and (4) carrying out concrete pouring construction on the structural top plate of the jacking pipe receiving well, and carrying out top plate earthing and backfilling to complete the construction of the whole jacking pipe channel structure.
2. The construction process for the oblique jacking pipe receiving end according to claim 1, which is characterized in that: the receiving well is a special-shaped well, and the joint of the special-shaped receiving well and the jacking pipe channel is obliquely arranged relative to the jacking pipe channel.
3. The construction process for the oblique jacking pipe receiving end according to claim 2, wherein the construction process comprises the following steps: the extension wall is constructed with a plurality of extension walls, and the plurality of extension walls are arranged at one end, close to the starting well, of the inclined receiving well inlet; and the extension wall extends to the position where the connecting line of the other end of the receiving well inlet is vertical to the top pipe channel.
4. The construction process for the oblique jacking pipe receiving end according to claim 3, wherein the construction process comprises the following steps: the extension wall includes a main extension wall parallel to an edge of the receiving well and an auxiliary extension wall disposed on the main extension wall.
5. The construction process for the oblique jacking pipe receiving end according to claim 4, which is characterized in that: the main extension wall is further provided with an auxiliary extension wall extending towards the other end of the receiving well inlet, a post-pouring beam is further arranged between the auxiliary extension wall and the other end of the receiving well inlet, and the oblique-crossing duct pieces are locked through the auxiliary extension wall and the post-pouring beam.
6. The construction process for the oblique jacking pipe receiving end according to claim 3, wherein the construction process comprises the following steps: and the grouting position during secondary grouting comprises a position between the inlet of the receiving well and the jacking pipe sheet, a position between the main extension wall and the inlet of the receiving well and a position between the main extension wall and the auxiliary extension wall.
7. The construction process for the oblique jacking pipe receiving end according to claim 1, which is characterized in that: and when backfilling is carried out in a range enclosed by the connecting line of the extending wall and the other end of the receiving well inlet and the receiving well inlet, coating waterproof paint, and backfilling by adopting C20 plain concrete after coating.
8. The construction process for the oblique jacking pipe receiving end according to claim 7, wherein the construction process comprises the following steps: and when backfilling is carried out in a range enclosed by the connecting line of the extending wall and the other end of the receiving well inlet and the receiving well inlet, slope releasing backfilling is adopted, and synchronous grouting is carried out in the backfilling process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210851739.8A CN115199814A (en) | 2022-07-19 | 2022-07-19 | Construction process for oblique jacking pipe receiving end |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210851739.8A CN115199814A (en) | 2022-07-19 | 2022-07-19 | Construction process for oblique jacking pipe receiving end |
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| CN115199814A true CN115199814A (en) | 2022-10-18 |
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| CN202210851739.8A Pending CN115199814A (en) | 2022-07-19 | 2022-07-19 | Construction process for oblique jacking pipe receiving end |
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| CN112324444A (en) * | 2020-11-27 | 2021-02-05 | 中建八局轨道交通建设有限公司 | Shield large-gradient starting construction method |
| CN112412481A (en) * | 2020-12-17 | 2021-02-26 | 中铁二十二局集团轨道工程有限公司 | Starting method of shield special-shaped extension steel ring |
| CN113294166A (en) * | 2021-05-20 | 2021-08-24 | 北京建工土木工程有限公司 | Large-section rectangular jacking pipe oblique starting method |
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2022
- 2022-07-19 CN CN202210851739.8A patent/CN115199814A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100799979B1 (en) * | 2007-10-12 | 2008-02-01 | 평산에스아이 주식회사 | Lining reinforcing method for both edge parts of corrugated multi plated tunnel |
| CN102486091A (en) * | 2010-12-06 | 2012-06-06 | 上海市机械施工有限公司 | Construction method for oblique tunneling of rectangular pipe jacking machine in closed space |
| CN210564534U (en) * | 2019-06-21 | 2020-05-19 | 广东省基础工程集团有限公司 | Rectangular pipe jacking oblique crossing construction structure |
| CN112012753A (en) * | 2020-09-17 | 2020-12-01 | 江苏西尔德建设工程有限公司 | Shield tunneling machine starting method based on special-shaped extension steel ring |
| CN112324444A (en) * | 2020-11-27 | 2021-02-05 | 中建八局轨道交通建设有限公司 | Shield large-gradient starting construction method |
| CN112412481A (en) * | 2020-12-17 | 2021-02-26 | 中铁二十二局集团轨道工程有限公司 | Starting method of shield special-shaped extension steel ring |
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