CN102277880B - Large-sized box jacking control construction method capable of enhancing accuracy - Google Patents
Large-sized box jacking control construction method capable of enhancing accuracy Download PDFInfo
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- CN102277880B CN102277880B CN 201110100602 CN201110100602A CN102277880B CN 102277880 B CN102277880 B CN 102277880B CN 201110100602 CN201110100602 CN 201110100602 CN 201110100602 A CN201110100602 A CN 201110100602A CN 102277880 B CN102277880 B CN 102277880B
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Abstract
The invention discloses a large-sized box jacking control construction method capable of enhancing accuracy. The construction method comprises the following steps of: arranging a plurality of cement stirring piles into a foundation pit on one side of a railway on which a frame bridge is required to be paved; reinforcing a subgrade soil body below the railway with cement water glass slurry to enhance the bearing force of a foundation; jacking a large-sized box towards the lower side of the railway by using jacking equipment; and preventing the large-sized box from being subjected to phenomena such as deviation, head tying or head raising and the like by different measures. By adopting the method, the positioning accuracy of the large-sized box can be ensured, good engineering quality and high safety are achieved, and normal operation of the existing railway is not obstructed.
Description
Technical field
The invention belongs to railway bridges and culverts construction field, particularly relate to a kind of large-size box jacking control job practices that can improve precision.
Technical background
Along with the develop rapidly of town and country construction, the recoverable amount of automobile increases year by year, so existing highway can't satisfy the requirement of traffic, therefore just need under some existing railway lines, lay frame bridge sometimes, to be used for the current of vehicle.Frame bridge is normally joined successively by more than one large-size box head and the tail and constitutes.But in the work progress of frame bridge, usually can run into such situation: because it is lower to wait to be provided with the bearing capacity of foundation soil at frame bridge place; And the weight of large-size box is relatively large; Thereby be easy to occur to prick phenomenons such as head and both sides landslide at the medium-and-large-sized casing of jack-in process; The result causes the design elevation of frame bridge to be difficult to control; Therefore will there be certain deviation between frame bridge after in place and the design, thereby seriously influences workmanship, and also can influence the safety of train to a certain extent.In addition, when the longitudinal centre line oblique of existing railway line and frame bridge, the jacking direction is difficult to control.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide and a kind ofly can improve precision, so the large-size box jacking of good engineering quality control job practices.
In order to achieve the above object, the large-size box jacking control job practices that can improve precision provided by the invention comprises the following step that carries out in order:
1) at first, needs determine the position and the size of foundation ditch on laying the ground of railway one side at frame bridge place;
2) many cement mixing piles vertically are set in foundation ditch, wherein the lateral edges position near railway utilizes the top of cement mixing pile to form the high outside and low outside slope of putting, and the stake top at all the other positions is consistent with the bottom height of putting the slope;
3) edge, opposite side edge is provided with row's back stake 5 with the perpendicular direction of jacking in away from the foundation ditch of railway; And the upper end of back stake is higher than the stake heights of roofs of the cement mixing pile that is adjacent, and on the stake top near the inboard cement mixing pile of back stake, is horizontally disposed with a back beam then;
4) foundation soil at all cement mixing pile tops is removed;
5) adopt the fan-shaped inclined hole mode of single hole to inject cement water glass slurry from the railway both sides of waiting to lay frame bridge, so that this place's subgrade soil is reinforced to the below of railway;
6) on the surface of putting the slope one deck slope protection layer is set, on the stake top of all the other cement mixing piles, lays one deck macadam earlier, on macadam, re-lay one deck reinforced concrete floor then as slide plate;
7) in the surperficial both sides of slide plate along the jacking direction of the large-size box two row's guiding piers that laterally arrange, the inboard near the guiding pier is horizontally disposed with a guided way then;
8) the good large-size box of site prefabrication on the slide plate between two guided ways;
9) from put the slope go up the position that parallels with the large-size box front end basil cut out a part of soil body with form the inclined-plane steeper put the slope, then with the sloping lower end of putting of front end spreading to the new formation of slide plate;
10) jacking equipment is placed between the rear end of back beam and large-size box, the top power of utilizing jacking equipment then is the direction jacking of large-size box to railway, treats that the basil on the large-size box when putting the slope, stops jacking;
11) continue according to the method for step 9) excavate piecemeal put the slope or be positioned at the place ahead of putting the slope and with put the slope and be in the reinforcing road bed of sustained height; Afterwards according to the method jacking large-size box of step 10); So repeatedly; Be in the design attitude under the railway fully until large-size box, accomplish the jack-in process of large-size box thus.
Described cement mixing pile adopts quincuncial arrangement in foundation ditch, its diameter is 600mm, and the spacing between the adjacent studs is 1m.
Described cement water glass slurry is with the water glass mixing and process by silicate cement mud.
Described reinforcing road bed length in the railway extension direction is 5-10m outside the large-size box both sides, and the degree of depth is identical with the lower end height of cement mixing pile.
Distance between described two guided ways equals the width of large-size box.
The bottom surface leading section of described large-size box is formed with 1: 10 fore slope.
Described jacking equipment is jack.
The large-size box jacking control job practices that can improve precision provided by the invention is in the foundation ditch of railway one side at needs laying frame bridge place, many cement mixing piles to be set; And utilize cement water glass slurry to reinforce to the subgrade soil of railway below; Improve the bearing capacity of substrate thus; Utilize then jacking equipment with large-size box to the jacking of railway below, utilize different measures to prevent that large-size box from occurring skew, pricking phenomenons such as head or new line in jack-in process simultaneously, so can guarantee the precision of large-size box after in place; So workmanship and safety are good, but also can not hinder the normal operation of existing railway.
Description of drawings
Fig. 1-Fig. 7 utilizes the large-size box jacking control job practices that can improve precision provided by the invention to carry out different phase large-size box in the work progress, line construction and construction installation view.
Fig. 8 is a large-size box structure side view.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the large-size box jacking control job practices that can improve precision provided by the invention is elaborated.
Like Fig. 1-shown in Figure 8, the large-size box jacking control job practices that can improve precision provided by the invention comprises the following step that carries out in order:
1) at first, needs determine the position and the size of foundation ditch on laying the ground of railway 1 one sides at frame bridge place; The length direction of foundation ditch should be consistent with the jacking direction of large-size box 10.
2) many cement mixing piles 3 vertically are set in foundation ditch, wherein utilize the top of cement mixing pile 3 to form the high outside and low outside slope 4 of putting near a lateral edges position of railway 1, the stake top at all the other positions is consistent with the bottom height of putting sloping 4; Cement mixing pile 3 adopts quincuncial arrangement in foundation ditch, its diameter is 600mm, and the spacing between the adjacent studs is 1m, and length then needs to confirm through calculating according to desired bearing capacity.
3) edge, opposite side edge is provided with row's back stake 5 with the perpendicular direction of jacking in away from the foundation ditch of railway 1; And the upper end of back stake 5 is higher than the stake heights of roofs of the cement mixing pile 3 that is adjacent, and on the stake top near the inboard cement mixing pile 3 of back stake 5, is horizontally disposed with a back beam 6 then;
4) foundation soil at all cement mixing pile 3 tops is removed;
5) adopt the fan-shaped inclined hole mode of single hole to inject cement water glass slurry from railway 1 both sides of waiting to lay frame bridge, so that this place's subgrade soil is reinforced to the below of railway 1; Grouting method is to utilize the drilling rod on the rig to get out a plurality of holes that are quincuncial arrangement to oblique below; Extract drilling rod then out; The Grouting Pipe of utilizing rig that the bottom is formed with a plurality of injected holes again is inserted in the above-mentioned hole that is formed by drilling rod, utilizes air compressor machine and grouting pump to be mixed and the slurries processed carry out slip casting through Grouting Pipe by silicate cement mud and water glass afterwards, then drilling rod is extracted 3 meters; Carry out slip casting once more; To be reinforced up to reaching slurries that soil body inner pore water is discharged and the slip casting that is full of hole requires back pumpback Grouting Pipe, and immediately injected hole crammed, in case whitewashing.In addition, reinforcing road bed length at railway 1 bearing of trend is 5-10m outside large-size box 10 both sides, and the degree of depth is identical with the lower end height of cement mixing pile 3.
6) on the surface of putting slope 4 one deck slope protection layer 7 is set; On the stake top of all the other cement mixing piles 3, lay one deck macadam 8 earlier; On macadam 8, re-lay one deck reinforced concrete floor then and as slide plate 9, can slide plate 9 be made and face upward the slope, the gradient is 1 ‰-3 ‰;
7) in the surperficial both sides of slide plate 9 along the jacking direction of the large-size box 10 two row's guiding piers 11 that laterally arrange, the inboard near guiding pier 11 is horizontally disposed with a guided way 12 then;
8) the good large-size box 10 of site prefabrication on the slide plate between two guided ways 12 9; Article two, the distance between the guided way 12 equals the width of large-size box 10, and the bottom surface leading section of large-size box 10 is formed with 1: 10 fore slope 15.
9) from put the position that parallels with the large-size box 10 front end basils 13 on the slope 4 cut out a part of soil body with form the inclined-plane steeper put slope 14, then with the front end spreading of slide plate 9 to new form put sloping 14 lower ends;
10) will be placed on as the jack of jacking equipment between the rear end of back beam 6 and large-size box 10, and utilize its top power then, treat the basil 13 approaching the putting on the large-size box 10 at sloping 14 o'clock, stop jacking the direction jacking of large-size box 10 to railway 1; In jack-in process; Mainly be to rely on two guided ways 12 to prevent to squint about large-size box 10 from occurring; And the constructor will monitor the horizontal level of large-size box 10 at any time in this process; Described new line phenomenon occurs in case find the front end of large-size box 10, the method that can be employed in the front end increase counterweight of large-size box 10 is corrected, so that its center of gravity reach.
11) continue according to the method for step 9) excavate piecemeal put slope 14 or be positioned at the place ahead of putting slope 14 and with put slope 14 and be in the reinforcing road bed of sustained height; Afterwards according to the method jacking large-size box 10 of step 10); So repeatedly; Be in the design attitude under the railway 1 fully until large-size box 10, accomplish the jack-in process of large-size box thus.
Claims (7)
1. job practices is controlled in the large-size box jacking that can improve precision, it is characterized in that: described large-size box jacking control job practices comprises the following step that carries out in order:
1) at first, needs determine the position and the size of foundation ditch on laying the ground of railway (1) one side at frame bridge place;
2) many cement mixing piles (3) vertically are set in foundation ditch, wherein utilize the top of cement mixing pile (3) to form the high outside and low outside slope (4) of putting near a lateral edges position of railway (1), the stake top at all the other positions is consistent with the bottom height of putting slope (4);
3) edge, opposite side edge is provided with row's back stake (5) with the perpendicular direction of jacking in away from the foundation ditch of railway (1); And the upper end of back stake (5) is higher than the stake heights of roofs of the cement mixing pile (3) that is adjacent, and on the stake top near the inboard cement mixing pile (3) of back stake (5), is horizontally disposed with a back beam (6) then;
4) foundation soil at all cement mixing piles (3) top is removed;
5) adopt the fan-shaped inclined hole mode of single hole to inject cement water glass slurry from railway (1) both sides of waiting to lay frame bridge, so that this place's subgrade soil is reinforced to the below of railway (1);
6) on the surface of putting slope (4) one deck slope protection layer (7) is set, goes up on the stake top of all the other cement mixing piles (3) and lay one deck macadam (8) earlier, on macadam (8), re-lay one deck reinforced concrete floor then as slide plate (9);
7) in the surperficial both sides of slide plate (9) along the jacking direction of large-size box (10) the two row's guiding piers (11) that laterally arrange, the inboard near guiding pier (11) is horizontally disposed with a guided way (12) then;
8) slide plate (9) between two guided ways (12) is gone up the good large-size box of site prefabrication (10);
9) from put slope (4) go up the position that parallels with large-size box (10) the front end basil (13) cut out a part of soil body with form the inclined-plane steeper put slope (14), then front end spreading to the new formation of slide plate (9) put lower end, slope (14);
10) jacking equipment is placed between the rear end of back beam (6) and large-size box (10); The top power of utilizing jacking equipment then is with the direction jacking of large-size box (10) to railway (1); Treat that the basil (13) on the large-size box (10) when putting slope (14), stops jacking;
11) continue according to the method for step 9) excavate piecemeal put slope (14) or be positioned at the place ahead of putting slope (14) and with put slope (14) and be in the reinforcing road bed of sustained height; Afterwards according to the method jacking large-size box (10) of step 10); So repeatedly; Be in the design attitude under the railway (1) fully until large-size box (10), accomplish the jack-in process of large-size box thus.
2. the large-size box jacking control job practices that can improve precision according to claim 1, it is characterized in that: described cement mixing pile (3) adopts quincuncial arrangement in foundation ditch, its diameter is 600mm, and the spacing between the adjacent studs is 1m.
3. the large-size box jacking control job practices that can improve precision according to claim 1 is characterized in that: described cement water glass slurry is with the water glass mixing and process by silicate cement mud.
4. the large-size box jacking control job practices that can improve precision according to claim 1; It is characterized in that: described reinforcing road bed length at railway (1) bearing of trend is 5-10m outside large-size box (10) both sides, and the degree of depth is identical with the lower end height of cement mixing pile (3).
5. the large-size box jacking control job practices that can improve precision according to claim 1, it is characterized in that: the distance between described two guided ways (12) equals the width of large-size box (10).
6. the large-size box jacking control job practices that can improve precision according to claim 1, it is characterized in that: the bottom surface leading section of described large-size box (10) is formed with 1: 10 fore slope (15).
7. the large-size box jacking control job practices that can improve precision according to claim 1, it is characterized in that: described jacking equipment is jack.
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| CN 201110100602 CN102277880B (en) | 2011-04-21 | 2011-04-21 | Large-sized box jacking control construction method capable of enhancing accuracy |
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| CN 201110100602 CN102277880B (en) | 2011-04-21 | 2011-04-21 | Large-sized box jacking control construction method capable of enhancing accuracy |
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| CN102277880B true CN102277880B (en) | 2012-12-26 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102619523B (en) * | 2012-03-20 | 2014-01-01 | 中铁六局集团有限公司 | Unequal-height tank whole jacking construction method |
| CN102798538A (en) * | 2012-08-07 | 2012-11-28 | 中铁六局集团天津铁路建设有限公司 | Monitoring system used for large-scale box jacking construction |
| CN103410096B (en) * | 2013-08-15 | 2015-06-03 | 中铁六局集团天津铁路建设有限公司 | Box jacking method for performing correction on deflection end by virtue of jack in oblique crossing jacking process |
| CN105064216B (en) * | 2015-07-29 | 2016-08-24 | 中铁六局集团天津铁路建设有限公司 | Prevent existing line from traversing method occurring during a kind of jacking extra-long frame bridge |
| CN107419741B (en) * | 2017-07-04 | 2023-04-18 | 中铁上海设计院集团有限公司 | Slideway structure for preventing jacking box body from deviating and construction method thereof |
| CN107447673B (en) * | 2017-09-13 | 2018-10-12 | 中铁六局集团天津铁路建设有限公司 | Method for adjusting frame bridge upper box jacking height difference |
| CN108930226A (en) * | 2018-08-20 | 2018-12-04 | 中铁六局集团天津铁路建设有限公司 | The construction method of jacked frame bridge upper box in the way of spreading slide plate |
| CN110676791A (en) * | 2019-10-16 | 2020-01-10 | 广东天联电力设计有限公司 | Assembled cable trench and construction method |
| CN111041995B (en) * | 2019-12-30 | 2021-06-25 | 中铁六局集团天津铁路建设有限公司 | Construction method for U-shaped frame structure to penetrate high-speed rail bridge obliquely downwards |
| CN113898006B (en) * | 2020-06-22 | 2023-02-10 | 兴泰建设集团有限公司 | Stable and rapid jacking construction method for box culvert under large excavation surface |
| CN111764315A (en) * | 2020-07-09 | 2020-10-13 | 中铁六局集团天津铁路建设有限公司 | Method for sleeving top of railway culvert in flood season |
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| KR100916675B1 (en) * | 2008-11-07 | 2009-09-09 | 주식회사 한가람 | Passage box for the approach with maintenance fixation equipment of the bridge and its method of construction |
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| CN101935988A (en) * | 2010-08-24 | 2011-01-05 | 攀钢集团冶金工程技术有限公司 | Box culvert structure and jacking method of box culvert for penetrating roadbed |
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Patent Citations (4)
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| JP2009108573A (en) * | 2007-10-30 | 2009-05-21 | Makoto Uemura | Box body laying method |
| KR100916675B1 (en) * | 2008-11-07 | 2009-09-09 | 주식회사 한가람 | Passage box for the approach with maintenance fixation equipment of the bridge and its method of construction |
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