CN104315251A - Manual pipe jacking construction method for earth and rock combined geological conditions - Google Patents
Manual pipe jacking construction method for earth and rock combined geological conditions Download PDFInfo
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- CN104315251A CN104315251A CN201410496436.4A CN201410496436A CN104315251A CN 104315251 A CN104315251 A CN 104315251A CN 201410496436 A CN201410496436 A CN 201410496436A CN 104315251 A CN104315251 A CN 104315251A
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- protective housing
- stone
- pipe
- pipeline
- steel plate
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Classifications
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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
- F16L1/06—Accessories therefor, e.g. anchors
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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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
Abstract
The invention relates to a manual pipe jacking construction method for earth and rock combined geological conditions. The method is characterized by comprising the following steps of preparation of construction, manufacturing of a working well, installation of equipment and manufacturing of a tool pipe, removal of earth and rock, jacking of a pipeline, injection of slurry into the pipe, and masonry of an inspection well and backfilling. The method has the beneficial effects that the influence on surrounding building facilities is avoided, the construction safety is guaranteed, the overexcavation amount is small, the construction cost is reduced, the construction schedule is guaranteed, and the influence on underground pipelines, foundations and the like is little.
Description
Technical field
The invention belongs to building engineering field, relate to artificial pipe jacking construction method under a kind of native stone combination geological condition.
Background technique
The fast development of urban construction, city complete sets of basic equipment facility is impelled to carry out perfect, all kinds of pipeline all will lay, for saving aboveground space, the mode of current various pipeline many employings embedded underground, but densely populated urban district or major trunk roads excavation buried pipeline comparatively large for nearby residents and traffic impact, therefore the application of jacking construction in urban duct is built is more and more extensive.
Jinan City's geological condition is special, and underground rock stratum distribution is wide, and more than rock stratum mostly is miscellaneous fill.During jacking construction, work surface is narrow and small, particularly under native stone combination geological condition, carries out push pipe, will face the cubic meter of stone and remove the difficulties such as difficulty is large, landslide, the cubic meter of stone is removed according to blast working, comparatively large on surrounding building structure impact, and value of backbreaking should not control, operator's personal safety is difficult to ensure.
Summary of the invention
The present invention is in order to make up the deficiencies in the prior art, and providing a kind ofly affects artificial pipe jacking construction method under little native stone combination geological condition to neighboring buildings, underground utility, ground.
The present invention is achieved through the following technical solutions:
Artificial pipe jacking construction method under native stone combination geological condition of the present invention, is characterized in that: comprise the following steps: preparation of construction → active well making → equipment installation, tool pipe make slip casting → inspection shaft in → soil, cubic meter of stone dismounting → pipeline jacking → pipe and build by laying bricks or stones and backfill.
Concrete steps are as follows:
(1) active well makes
Active well makes according to field condition, can select the modes such as open caisson, bolt-spary supports, cast in place reinforced bar concrete dado, upside-down well wall approach under the prerequisite guaranteeing construction safety;
(2) tool pipe makes
The basis that conventional tool pipe makes adds steel plate protective housing, and steel plate protective housing is anchored at first segment pipeline outer upper, forms working space between below steel plate protective housing and above pipeline; Protective housing is decomposed into some be transported to carry out in well assembled;
(3) soil, the cubic meter of stone are removed
The A earthwork is removed
The cubic metre of earth and stone under soil stone combination geological condition is removed and is taked inclined-plane drivage method, carries out from top to bottom; Push up in advance in conditions permit situation, by inner for steel plate protective housing incision soil layer, first the front end earthwork of pipeline vault excavated, excavating depth is less than and allows backbreak value and steel plate protective housing penetraction depth;
The B cubic meter of stone is removed:
Hydraulic rock splitting machine coordinates air drill, pneumatic pick to remove the cubic meter of stone; Strict control over-excavation amount, with digging with jacking; The amount of backbreaking controls mainly for cubic meter of stone position, lays to reach reduce to backbreak the object of value by optimizing bore position; Ventilate in active well unimpeded; Be equipped with harmful gas detector in active well, prevent harmful gas from infiltrating;
(4) pipeline jacking
Top power change is kept a close eye on during pipeline jacking, stopping jacking immediately as found that top power increases suddenly, entering hole and having checked whether that stone corner angle hinder jacking, if clear in hole, then consider that steel plate protective housing runs into obstacle after entering soil layer, should continue to excavate until obstacle is removed; If rock stratum distribution changes, the principle with digging with jacking when above position, pipe top is positioned at rock stratum, need be followed;
(5) slip casting in pipe
First by the pipeline outer wall in active well and received well and space shutoff between arch hole before slip casting, prevent slurry from outflowing, slip casting layered injects, and slurry precipitation to be implanted re-injects after solidifying.
During step (2) tool pipe makes,
For reducing the amount of backbreaking, steel plate protective housing is consistent with pipeline outer wall radian; During intraductal operation insufficient space, add shaped steel, strengthen working space to greatest extent between pipeline outer wall and steel plate protective housing, shaped steel thickness is less than and allows value of backbreaking; For preventing the slump earthwork from damaging protective housing, steel plate protective housing anchorage length is preferably 1:2 with the front length ratio of pipe; When more than pipe top being miscellaneous fill, for preventing landslide from need push up in advance, for reducing jacking resistance, when selecting steel plate thicker, front end is made into sword pin.
During step (3) soil, the cubic meter of stone are removed, when the step B cubic meter of stone is removed,
Boring: for preventing producing dust during boring, air drill is added water injecting pipe; Pitch-row is determined according to stone matter situation and hydraulic splitting acc power;
Splitting: utilize the top earthwork to excavate the space of rear formation as free face, uses hydraulic rock splitting machine that bulk is resolved in overall rock stratum, and splitting order is carried out from top to bottom, and recycling pneumatic pick is by broken for the stone being not easy to carry;
Corner is rebuild: utilize pneumatic pick to be rebuild at position not in place for dismounting, uses rubble to flatten, guarantee that pipeline passes through smoothly bottom arch hole according to design altitude.
In step (5) pipe in slip casting, slip casting comprises the raw material of following weight percentage: cement 30%, fine clay 60%, unslaked lime 10%, then adds the water accounting for raw material gross weight 50%, stir.
The protective housing that under native stone combination geological condition of the present invention, artificial pipe jacking construction method is used, it is characterized in that: protective housing is anchored at first segment pipeline outer upper, protective housing is fixed together by some block plates and makes, protective housing is reclinate circular arc, forms working space between below steel plate protective housing and above pipeline; Be provided with between pipeline outer wall and steel plate protective housing for strengthening the type steel support bar supported.
Before the anchorage length of steel plate protective housing and pipeline, length ratio is preferably 1:2, and namely the anti-length being covered with 1/3rd is anchored on first segment pipeline, has the length of 2/3rds to be positioned at before first segment pipeline.
The invention has the beneficial effects as follows, on surrounding building structure without impact, guarantee construction safety, the amount of backbreaking is little, reduces construction cost, ensures construction speed, little on the impact such as underground utility, ground.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.Fig. 2 is protective housing and first segment piping schematic.
In figure, 1 protective housing, 2 first segment pipelines, 3 struts.
Embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.
Artificial pipe jacking construction method under native stone combination geological condition of the present invention, comprises the following steps: preparation of construction → active well making → equipment installation, tool pipe make slip casting → inspection shaft in → soil, cubic meter of stone dismounting → pipeline jacking → pipe and build by laying bricks or stones and backfill.
Concrete steps are as follows:
(1) active well makes
Active well makes according to field condition, can select the modes such as open caisson, bolt-spary supports, cast in place reinforced bar concrete dado, upside-down well wall approach under the prerequisite guaranteeing construction safety.
(2) tool pipe makes
The basis that conventional tool pipe makes adds steel plate protective housing, and steel plate protective housing is anchored at first segment pipeline outer upper, forms working space between below steel plate protective housing and above pipeline, ensures operator safety:
The protective housing that under soil stone combination geological condition, artificial pipe jacking construction method is used, protective housing 1 is anchored at first segment pipeline 2 outer upper, protective housing is fixed together by some block plates and makes, protective housing is reclinate circular arc, forms working space between below steel plate protective housing and above pipeline; Be provided with between pipeline outer wall and steel plate protective housing for strengthening the type steel support 3 supported.
Before the anchorage length of steel plate protective housing and pipeline, length ratio is preferably 1:2, and namely the anti-length being covered with 1/3rd is anchored on first segment pipeline, has the length of 2/3rds to be positioned at before first segment pipeline.
1) for convenience of install, protective housing can be decomposed into some be transported to carry out in well assembled;
2) be the reduction amount of backbreaking, steel plate protective housing is consistent with pipeline outer wall radian;
3) if intraductal operation insufficient space time, between pipeline outer wall and steel plate protective housing, add shaped steel, strengthen working space to greatest extent, shaped steel thickness is less than and allows value of backbreaking;
4) for preventing the slump earthwork from damaging protective housing, cause unexpected injury, steel plate protective housing anchorage length is preferably 1:2 with the front length ratio of pipe.
5) when more than pipe top being miscellaneous fill (the non-cubic meter of stone), for preventing landslide from need push up in advance, for reducing jacking resistance, when selecting steel plate thicker, front end can be made into sword pin.
(3) soil, the cubic meter of stone are removed
1) earthwork is removed
The cubic metre of earth and stone under soil stone combination geological condition is removed and is taked inclined-plane drivage method, carries out from top to bottom.Push up in advance in conditions permit situation (during jacking keep a close eye on top power change), by inner for steel plate protective housing incision soil layer, first the front end earthwork of pipeline vault excavated, excavating depth is less than and allows backbreak value and steel plate protective housing penetraction depth.
2) cubic meter of stone is removed: strict control over-excavation amount, with digging with jacking; The amount of backbreaking controls mainly for cubic meter of stone position, lays to reach reduce to backbreak the object of value by optimizing bore position; Ventilate in active well unimpeded; Be equipped with harmful gas detector in active well, prevent harmful gas from infiltrating;
Boring: for preventing producing dust during boring, air drill is added water injecting pipe.Pitch-row is determined according to stone matter situation and hydraulic splitting acc power.
Splitting: utilize the top earthwork to excavate the space of rear formation as free face, uses hydraulic rock splitting machine that bulk is resolved in overall rock stratum, and splitting order is carried out from top to bottom, and recycling pneumatic pick is by broken for the stone being not easy to carry.
Corner is rebuild: utilize pneumatic pick to be rebuild at position not in place for dismounting, uses rubble to flatten, guarantee that pipeline passes through smoothly bottom arch hole according to design altitude.
(4) pipeline jacking (adopting steel concrete tubing)
First segment pipeline with protective housing is positioned at foremost, carries out operation in the working space of operating worker between protective housing and first segment pipeline.Top power change is kept a close eye on during pipeline jacking, stopping jacking immediately as found that top power increases suddenly, entering hole and having checked whether that stone corner angle hinder jacking, if clear in hole, then consider that steel plate protective housing runs into obstacle after entering soil layer, should continue to excavate until obstacle is removed.If rock stratum distribution changes, the principle with digging with jacking when above position, pipe top is positioned at rock stratum, need be followed.
(5) slip casting in pipe
The more common earthwork push pipe of the cubic meter of stone section amount of the backbreaking amount of backbreaking wants large, and part of backbreaking must effectively be filled, and therefore slip casting work is particularly important.In pipe, jacking construction section safety is guaranteed in slip casting, avoids subsiding owing to producing the road surface of causing in space between pipeline soil wall, strengthens the self-stability of ground, soil body robustness and compressive strength.First by the pipeline outer wall in active well and received well and space shutoff between arch hole before slip casting, prevent slurry from outflowing, slip casting layered injects, and slurry precipitation to be implanted re-injects after solidifying.
slip casting mixing ratio in pipe
| P.O32.5 cement | Fine clay | Unslaked lime | Ratio of water to material |
| 30% | 60% | 10% | 0.5：1 |
Native stone of the present invention compares in conjunction with jacking construction engineering method artificial under geological condition carry out performance analysis with traditional construction technique (soundless cracking agent, explosion, pneumatic pick fragmentation):
Economic benefit: advantage of the present invention is, 1, safety coefficient is large, is easy to operation, energy-saving and cost-reducing.2, do not receive ambient conditions constraint, can uninterruptedly work continuously.3, accelerating construction progress, average every day drilling depth 2-4m.The shortcoming of conventional construction method is, 1, explosion risk factor is large, the purchasing of blasting supply, deposit, user cost is high.2, soundless cracking agent limits by ambient temperature, long construction period.3, to remove special hard stone difficulty comparatively large for pneumatic pick, every day drilling depth about 10cm.
Social benefit is: advantage of the present invention is, greatly reduces construction and produces broken property impact and the impact on nearby residents daily life to surrounding building, reduce because of the traffic pressure caused of constructing.The shortcoming of conventional construction method is, easily causes damage to all round building and underground utility, easily produces the adverse consequencess such as dust, noise, vibrations.
Environmental benefit is: advantage of the present invention is, during construction to environment without any adverse effect, concentrate manageability without dust, noise free, dregs.The shortcoming of conventional construction method is, 1, blast working easily causes environment, body of groundwater to pollute; 2, in rock blasting process, easily generation stirs up a cloud of dust, and Blasting dust is to environment.
application example:on July 30,20 days to 2013 April in 2013, Jinan ChengJian Group uses this engineering method in the jacking construction of Jinan City's purification of water quality three factory supporting extension project first bid section two ring East Road, construction area is positioned at business district, and nearby residents district personnel dealing is more, does not possess the condition of closed excavation construction.And the underground utility complex distribution such as gas-pipe line, electric power, feedwater.Test in construction and verify, practice of construction is respond well, complete construction task smoothly, obtain owner's repeatedly favorable comment, first bid section of the Yellow River road and bridge engineering company construction uses for reference this engineering method, completes its construction task smoothly, after testing Specifications, this engineering method meets construction requirement, has good economic technology and is worth.
Claims (7)
1. an artificial pipe jacking construction method under native stone combination geological condition, is characterized in that: comprise the following steps: preparation of construction → active well making → equipment installation, tool pipe make slip casting → inspection shaft in → soil, cubic meter of stone dismounting → pipeline jacking → pipe and build by laying bricks or stones and backfill.
2. artificial pipe jacking construction method under native stone combination geological condition according to claim 1, is characterized in that: concrete steps are as follows:
(1) active well makes
Active well makes according to field condition, can select the modes such as open caisson, bolt-spary supports, cast in place reinforced bar concrete dado, upside-down well wall approach under the prerequisite guaranteeing construction safety;
(2) tool pipe makes
The basis that conventional tool pipe makes adds steel plate protective housing, and steel plate protective housing is anchored at first segment pipeline outer upper, forms working space between below steel plate protective housing and above pipeline; Protective housing is decomposed into some be transported to carry out in well assembled;
(3) soil, the cubic meter of stone are removed
The A earthwork is removed
The cubic metre of earth and stone under soil stone combination geological condition is removed and is taked inclined-plane drivage method, carries out from top to bottom; Push up in advance in conditions permit situation, by inner for steel plate protective housing incision soil layer, first the front end earthwork of pipeline vault excavated, excavating depth is less than and allows backbreak value and steel plate protective housing penetraction depth;
The B cubic meter of stone is removed:
Hydraulic rock splitting machine coordinates air drill, pneumatic pick to remove the cubic meter of stone; Strict control over-excavation amount, with digging with jacking; The amount of backbreaking controls mainly for cubic meter of stone position, lays to reach reduce to backbreak the object of value by optimizing bore position; Ventilate in active well unimpeded; Be equipped with harmful gas detector in active well, prevent harmful gas from infiltrating;
(4) pipeline jacking
Top power change is kept a close eye on during pipeline jacking, stopping jacking immediately as found that top power increases suddenly, entering hole and having checked whether that stone corner angle hinder jacking, if clear in hole, then consider that steel plate protective housing runs into obstacle after entering soil layer, should continue to excavate until obstacle is removed; If rock stratum distribution changes, the principle with digging with jacking when above position, pipe top is positioned at rock stratum, need be followed;
(5) slip casting in pipe:
Slip casting in space between pipeline outer wall and arch hole; Slip casting layered injects, and slurry precipitation to be implanted re-injects after solidifying.
3. artificial pipe jacking construction method under native stone combination geological condition according to claim 1, is characterized in that: during step (2) tool pipe makes,
For reducing the amount of backbreaking, steel plate protective housing is consistent with pipeline outer wall radian; During intraductal operation insufficient space, add shaped steel, strengthen working space to greatest extent between pipeline outer wall and steel plate protective housing, shaped steel thickness is less than and allows value of backbreaking; For preventing the slump earthwork from damaging protective housing, steel plate protective housing anchorage length is preferably 1:2 with the front length ratio of pipe; When more than pipe top being miscellaneous fill, for preventing landslide from need push up in advance, for reducing jacking resistance, when selecting steel plate thicker, front end is made into sword pin.
4. artificial pipe jacking construction method under native stone combination geological condition according to claim 1, is characterized in that: during step (3) soil, the cubic meter of stone are removed, when the step B cubic meter of stone is removed,
Boring: for preventing producing dust during boring, air drill is added water injecting pipe; Pitch-row is determined according to stone matter situation and hydraulic splitting acc power;
Splitting: utilize the top earthwork to excavate the space of rear formation as free face, uses hydraulic rock splitting machine that bulk is resolved in overall rock stratum, and splitting order is carried out from top to bottom, and recycling pneumatic pick is by broken for the stone being not easy to carry;
Corner is rebuild: utilize pneumatic pick to be rebuild at position not in place for dismounting, uses rubble to flatten, guarantee that pipeline passes through smoothly bottom arch hole according to design altitude.
5. artificial pipe jacking construction method under native stone combination geological condition according to claim 1, it is characterized in that: in step (5) pipe in slip casting, slip casting comprises the raw material of following weight percentage: cement 30%, fine clay 60%, unslaked lime 10%, add the water accounting for raw material gross weight 50% again, stir.
6. the protective housing that under a native stone combination geological condition according to claim 1, artificial pipe jacking construction method is used, it is characterized in that: protective housing is anchored at first segment pipeline outer upper, protective housing is fixed together by some block plates and makes, protective housing is reclinate circular arc, forms working space between below steel plate protective housing and above pipeline; Be provided with between pipeline outer wall and steel plate protective housing for strengthening the type steel support bar supported.
7. protective housing according to claim 6, it is characterized in that: before the anchorage length of steel plate protective housing and pipeline, length ratio is preferably 1:2, namely prevent that the length being covered with 1/3rd is anchored on first segment pipeline, have the length of 2/3rds to be positioned at before first segment pipeline.
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| CN201410496436.4A CN104315251B (en) | 2014-09-25 | 2014-09-25 | Artificial pipe jacking construction method under soil stone combination geological conditions |
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| CN201410496436.4A CN104315251B (en) | 2014-09-25 | 2014-09-25 | Artificial pipe jacking construction method under soil stone combination geological conditions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487908A (en) * | 2018-03-01 | 2018-09-04 | 中铁六局集团有限公司 | A kind of basil device and its construction method of the shoveling of jacking construction auxiliary |
| CN111810715A (en) * | 2020-06-18 | 2020-10-23 | 中铁工程装备集团有限公司 | Trenchless pipeline updating method and construction system |
| CN116906049A (en) * | 2023-09-08 | 2023-10-20 | 中铁七局集团广州工程有限公司 | Construction method for breaking large boulder of jacking pipe through mechanical splitting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487908A (en) * | 2018-03-01 | 2018-09-04 | 中铁六局集团有限公司 | A kind of basil device and its construction method of the shoveling of jacking construction auxiliary |
| CN111810715A (en) * | 2020-06-18 | 2020-10-23 | 中铁工程装备集团有限公司 | Trenchless pipeline updating method and construction system |
| CN116906049A (en) * | 2023-09-08 | 2023-10-20 | 中铁七局集团广州工程有限公司 | Construction method for breaking large boulder of jacking pipe through mechanical splitting |
| CN116906049B (en) * | 2023-09-08 | 2023-12-08 | 中铁七局集团广州工程有限公司 | Construction method for breaking large boulder of jacking pipe through mechanical splitting |
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| CN104315251B (en) | 2016-05-18 |
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