CN111287757A - Pipe jacking construction method for penetrating through long mortar layer - Google Patents
Pipe jacking construction method for penetrating through long mortar layer Download PDFInfo
- Publication number
- CN111287757A CN111287757A CN202010093933.5A CN202010093933A CN111287757A CN 111287757 A CN111287757 A CN 111287757A CN 202010093933 A CN202010093933 A CN 202010093933A CN 111287757 A CN111287757 A CN 111287757A
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- CN
- China
- Prior art keywords
- mortar layer
- jacking
- pipe
- long
- head
- 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.)
- Pending
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Classifications
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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
- E21D9/04—Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0671—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end with means for consolidating the rock in front of the shield by injection of consolidating substances through boreholes
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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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 relates to a pipe jacking construction method for penetrating through a long mortar layer, which comprises the following steps: 1. detecting the length and the specific position of the encountered mortar layer before construction so as to confirm the long mortar layer area containing the barrier; 2. adopting a muddy water balance top pipe machine head to dig in the long mortar layer area, and 3, additionally arranging an air pressure bin, adopting an air pressure barrier removal process to manually remove the rock blocks and check the condition of a cutter head of the muddy water balance top pipe machine head, thereby ensuring the digging efficiency; 4. the grouting in the jacking process is divided into two stages, in the first stage, fly ash mixed slurry is synchronously injected close to the front part of the machine head, the gap of the over-excavation part is filled, the pipeline is prevented from being wrapped by mortar, a grouting anti-drag channel is formed, and the instability of the pipeline is prevented; thixotropic slurry is injected in the second stage, so that the supporting and lubricating effects are achieved, and the resistance is reduced. The invention can ensure that the jacking pipe can smoothly pass through the long-distance mortar layer, avoid delay of construction period due to the fact that jacking is blocked, save cost for project construction, and obtain economic, reasonable and practical effects.
Description
Technical Field
The invention relates to a pipe jacking construction method, in particular to a pipe jacking construction method for enabling a pipe jacking to penetrate through a long mortar layer.
Background
At present, block stones cannot penetrate through the pipe jacking construction, construction can be continued only after obstacles are removed, and long-distance mortar left by obstacles removal can form a long mortar layer in a channel, so that certain difficulty is caused in jacking. Under the engineering background, no systematic efficient construction method for coping treatment exists at present, the single measure adopted has extremely poor implementation effect, and the progress of the engineering project is seriously influenced, so that a targeted systematic construction method is needed to solve the problem.
Disclosure of Invention
Aiming at the current situation that no proper systematic measures are taken to solve the problem that the jacking pipe penetrates through the long mortar layer at present, the invention provides a concrete and effective jacking pipe construction method for penetrating through the long mortar layer.
In order to realize the construction purpose, the invention adopts the following technical scheme:
a pipe-jacking construction method for penetrating through a long mortar layer comprises the following steps:
(1) detecting the length and specific position of the encountered mortar layer before construction so as to confirm the long sand containing the obstacles
A slurry layer region;
(2) adopting a mud-water balance top pipe machine head to tunnel in the long mortar layer area,
(3) an air pressure bin is additionally arranged, the block stone is manually removed by adopting an air pressure obstacle clearing process, the condition of a cutter head of a muddy water balance ejector pipe head is checked, and the tunneling efficiency is ensured;
(4) the grouting in the jacking process is divided into two stages, in the first stage, fly ash mixed slurry is synchronously injected close to the front part of the machine head, the gap of the over-excavation part is filled, the pipeline is prevented from being wrapped by mortar, a grouting anti-drag channel is formed, and the instability of the pipeline is prevented; thixotropic slurry is injected in the second stage, so that the supporting and lubricating effects are achieved, and the resistance is reduced.
Furthermore, the muddy water balance jacking pipe head is a muddy water balance jacking pipe head with 3cm of over-excavation capacity in one-side tunneling mode, and the problem that the jacking pipe is difficult to correct in a mortar layer can be solved.
Furthermore, after the cutter head of the muddy water balance jacking pipe machine head is decelerated by 3 motors through a planetary reducer, a pinion on a main shaft of the planetary reducer drives a large gear in the middle of a cutter rest reduction box, and then the main shaft arranged at the center of the large gear drives the cutter rest and the cutter head to rotate.
Further, the torque of the cutter head is 180KN m.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can effectively solve the construction problem that the jacking pipe passes through the long mortar layer, and avoids economic loss caused by engineering stagnation.
2. The construction method provided by the invention is a measure which can be used for construction more quickly and conveniently, is high in applicability and can ensure high efficiency of tunneling.
Detailed Description
The invention is further illustrated by the following examples.
A pipe jacking construction method for solving the problem of penetrating through a long mortar layer comprises the following steps:
1. detecting the length and the specific position of the encountered mortar layer before construction so as to confirm the long mortar layer area containing the barrier;
2. tunneling in the long mortar layer area, adopting an improved new slurry water balance jacking pipe head, and solving the problem that the jacking pipe is difficult to correct in the mortar layer due to the fact that one side of the jacking pipe head has 3cm of overbreak capacity;
3. an air pressure bin is additionally arranged, and an air pressure barrier removal process is adopted to manually remove the rock blocks and check the condition of a cutter head, so that the tunneling efficiency of the equipment is ensured;
4. the grouting in the jacking process is divided into two stages, in the first stage, fly ash mixed slurry is synchronously injected close to the front part of the machine head, the gap of the over-excavation part is filled, the pipeline is prevented from being wrapped by mortar, a grouting anti-drag channel is formed, and the instability of the pipeline is prevented; thixotropic slurry is injected in the second stage, so that the supporting and lubricating effects are achieved, and the resistance is reduced.
Specifically, a 58.5m long mortar layer is detected to exist after a well top pipe is taken out of a hole in a certain project, the sand layer is taken as a barrier removing range in a riprap area, then the sand layer enters the sludge layer, when the well top pipe is jacked to 135.3m, the barrier removing mortar layer meets a rock stratum area, the sand layer is jacked to 27m and then enters the hole, and according to geological data, a top pipe mainly penetrates ② 2 sludge 77 m long mortar layer and 85.5m long mortar layer.
According to the characteristics of the stratum penetrated by the pipeline, the improved mud-water balance pipe jacking machine is adopted for construction according to requirements, the number and hardness of super digging cutters and cutter heads are increased, and the air pressure cabin is additionally arranged, so that the barrier removing function is achieved. The front end of the pipe jacking tunneling machine head is provided with a conical cutter rest, and an alloy cutter on the cutter rest is used for cutting soil and mortar with lower strength. The single side has 3cm of overbreak ability, solves the difficult problem of rectifying of push pipe in the mortar layer. The cutter head is decelerated by 3 motors through a planetary reducer, a pinion on a main shaft of the planetary reducer drives a large gear in the middle of a cutter rest reduction box, and then the main shaft arranged at the center of the large gear drives a cutter rest to rotate. The cutter head is driven by the cutter frame. The cutter head torque is 180KN m.
And an air pressure barrier removing method is adopted in jacking, when the pressure rises, the air pressure can keep and judge that the machine head enters a mortar layer, and when jacking is difficult, barrier removing and cutter disc cleaning are carried out after manual pressure rising.
Arranging a grouting hole close to the front part of the machine head, dividing grouting into two stages, and synchronously injecting fly ash mixed slurry close to the front part of the machine head in the first stage to fill a gap of an overbreak part, so as to prevent a pipeline from being wrapped by mortar, form a grouting anti-drag channel and prevent the pipeline from being unstable; thixotropic slurry is injected in the second stage, so that the supporting and lubricating effects are achieved, and the resistance is reduced. The slurry ratio is determined through experiments, and the strength of the slurry reaches 0.2-0.3 MPA after 2-3 d.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A pipe-jacking construction method for penetrating through a long mortar layer is characterized by comprising the following steps:
(1) detecting the length and the specific position of the encountered mortar layer before construction so as to confirm the long mortar layer area containing the barrier;
(2) adopting a mud-water balance top pipe machine head to tunnel in the long mortar layer area,
(3) an air pressure bin is additionally arranged, the block stone is manually removed by adopting an air pressure obstacle clearing process, the condition of a cutter head of a muddy water balance ejector pipe head is checked, and the tunneling efficiency is ensured;
(4) the grouting in the jacking process is divided into two stages, in the first stage, fly ash mixed slurry is synchronously injected close to the front part of the machine head, the gap of the over-excavation part is filled, the pipeline is prevented from being wrapped by mortar, a grouting anti-drag channel is formed, and the instability of the pipeline is prevented; thixotropic slurry is injected in the second stage, so that the supporting and lubricating effects are achieved, and the resistance is reduced.
2. The pipe-jacking construction method for penetrating through a long mortar layer according to claim 1, characterized in that: the muddy water balance jacking pipe head is a muddy water balance jacking pipe head with 3cm of over-excavation capacity in one-side tunneling mode, and the problem that a jacking pipe is difficult to rectify in a mortar layer can be solved.
3. The pipe-jacking construction method for penetrating through a long mortar layer according to claim 1, characterized in that: after the cutter head of the muddy water balance ejector pipe head is decelerated by 3 motors through a planetary reducer, a pinion on a main shaft of the planetary reducer drives a large gear in the middle of a cutter rest reduction box, and then the main shaft arranged at the center of the large gear drives the cutter rest and the cutter head to rotate.
4. The pipe jacking construction method for penetrating through a long mortar layer according to claim 3, wherein the construction method comprises the following steps: the torque of the cutter head is 180KN m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093933.5A CN111287757A (en) | 2020-02-14 | 2020-02-14 | Pipe jacking construction method for penetrating through long mortar layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093933.5A CN111287757A (en) | 2020-02-14 | 2020-02-14 | Pipe jacking construction method for penetrating through long mortar layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111287757A true CN111287757A (en) | 2020-06-16 |
Family
ID=71021988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010093933.5A Pending CN111287757A (en) | 2020-02-14 | 2020-02-14 | Pipe jacking construction method for penetrating through long mortar layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111287757A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240019A (en) * | 2015-09-24 | 2016-01-13 | 中国石油天然气集团公司 | Pipe jacking construction method |
| CN110030430A (en) * | 2019-03-12 | 2019-07-19 | 上海城建水务工程有限公司 | A kind of pipe jacking construction method for cylinder concrete pipe |
| CN110259475A (en) * | 2019-05-31 | 2019-09-20 | 武汉市武昌市政建设(集团)有限公司 | A kind of head is removed obstacles method |
-
2020
- 2020-02-14 CN CN202010093933.5A patent/CN111287757A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240019A (en) * | 2015-09-24 | 2016-01-13 | 中国石油天然气集团公司 | Pipe jacking construction method |
| CN110030430A (en) * | 2019-03-12 | 2019-07-19 | 上海城建水务工程有限公司 | A kind of pipe jacking construction method for cylinder concrete pipe |
| CN110259475A (en) * | 2019-05-31 | 2019-09-20 | 武汉市武昌市政建设(集团)有限公司 | A kind of head is removed obstacles method |
Non-Patent Citations (3)
| Title |
|---|
| 中铁电气化局集团建设管理分办司: "《城市轨道交通工程投融资及建设管理》", 31 August 2015, 中国铁道出版社 * |
| 曹德意: "某原水输水管道工程施工方案的优化", 《中国设备工程》 * |
| 葛克水: "《地下建筑工程施工》", 30 June 2014, 地质出版社 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20200616 |