CN111945671B - Construction method of concrete tooth wall at channel toe - Google Patents
Construction method of concrete tooth wall at channel toe Download PDFInfo
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- CN111945671B CN111945671B CN202010730272.2A CN202010730272A CN111945671B CN 111945671 B CN111945671 B CN 111945671B CN 202010730272 A CN202010730272 A CN 202010730272A CN 111945671 B CN111945671 B CN 111945671B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/66—Mould-pipes or other moulds
- E02D5/68—Mould-pipes or other moulds for making bulkheads or elements thereof
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Abstract
The invention relates to the field of hydraulic engineering channel engineering construction, in particular to the construction of a channel slope toe concrete tooth wall; the construction method mainly comprises the following process steps of setting a positioning device, driving steel sheet piles, excavating earthwork, pouring concrete of the tooth wall, pulling out the steel sheet piles, treating the inner side of the top closed surface of the concrete tooth wall, constructing a side slope structure and the like; the invention relates to a novel construction method of a slope toe concrete tooth wall of a channel, which overcomes the defects of the prior construction method that the earthwork is over excavated, the over-excavated backfill soil is settled to influence the stability of a side slope structure, the construction cost is high and the like when the height of the slope toe concrete tooth wall of an excavation or half-filling half-excavation channel is more than 0.8m and the soil quality is poor and a groove of the tooth wall needs to be pitched, and realizes the construction of the slope toe concrete tooth wall structure without over-excavation.
Description
Technical Field
The invention relates to the field of hydraulic engineering channel engineering construction, in particular to construction of a channel slope toe concrete tooth wall.
Background
At present, the construction of the concrete tooth wall at the channel toe adopts manual work or manually-assisted machinery to excavate a designed tooth wall space, then concrete is poured, and aiming at the construction method, the construction method is divided into two conditions: the method comprises the following steps of firstly, when the stability of soil quality is good and the vertical excavation condition is met, vertically excavating according to the width of a tooth wall, and then directly pouring concrete, and in the second situation, when the stability of the soil quality is not met, the tooth wall pit slot is excavated by slope excavation, the slope of the slope excavation needs to meet the requirement of the stability of the tooth wall pit slot in the construction period, certain overexcavation is needed for meeting the requirement of erecting a template operation space, a slope foot concrete tooth wall template is erected firstly after the slope excavation, then concrete is poured, the template is removed after the concrete has a certain age, and finally, the concrete is compacted and backfilled due to the fact that the bottom is ultra-wide and the overexcavation part of the slope excavation is compacted and backfilled when the tooth wall pit slot is excavated by soil materials.
The existing construction method for the slope toe concrete tooth wall of the channel is feasible under the conditions of good soil stability and small depth of the tooth wall, but has a plurality of defects under the conditions of large depth of the slope toe concrete tooth wall and poor soil stability: (1) the concrete tooth wall pit groove of toe needs to be excavated by slope, the overexcavation amount is large, because the tooth wall pit groove is at the position of the toe of the side slope, the side of the tooth wall pit groove close to the bottom of the trench is relatively well treated, only the overexcavation within the depth range of the tooth wall structure is performed, when the tooth wall pit groove of the toe of the excavation trench or the semi-filled trench is excavated by slope, the side close to the trench slope causes outward excavation within a certain range, the existing side slope depends on the parameters such as the slope gradient of the trench, the slope gradient of the tooth wall pit groove construction, the depth of the tooth wall pit groove, and the like, the deeper the concrete tooth wall of toe, the more the slope gradient of the tooth wall pit groove excavation is gradually increased, the depth of the tooth wall pit groove in the current practical engineering reaches 1.5m, if the stability of the soil excavation is poor, the tooth wall pit groove is excavated by slope, the concrete tooth wall pit groove is excavated, and the tooth wall pit groove is slightly excavated, and has larger overexcavail construction, and (3) the concrete tooth wall pit slot and the channel side slope are excessively dug and the backfilling amount is large, so that the cost is increased and the construction period is prolonged.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a channel slope toe concrete tooth wall construction method; the invention aims to overcome the defects of the existing construction method when slope-slope excavation is required due to soil layer geological conditions in the construction of the slope toe concrete tooth wall of an excavation or semi-filling and semi-digging channel.
In order to achieve the purpose, the invention adopts the following technical scheme: a construction method of a concrete tooth wall of a channel toe comprises the following steps:
after the side slope and the bottom of the channel are excavated and formed and positioning devices of steel sheet piles are arranged, two side structure lines are designed along the slope toe concrete tooth wall and the steel sheet piles are driven into the steel sheet piles through the positioning devices, one side of the plurality of connected steel sheet piles close to the concrete tooth wall structure line is a vertical plane, earthwork within the design depth range of the slope toe concrete tooth wall between the two side steel sheet piles is excavated by adopting manpower or machinery with the assistance of manpower, at the moment, the steel sheet piles are used as templates for the construction of the concrete tooth wall, then pouring concrete into a tooth wall space formed by the steel sheet piles at two sides, then pulling out the steel sheet piles to fill gaps left when the steel sheet piles are pulled out, wherein the poured concrete exceeds the designed top surface of the tooth wall by a certain height, vibrating and compacting the concrete by adopting a flexible shaft vibrator after the steel sheet piles are pulled out, and performing surface shrinkage and edge trimming on the tooth wall top according to the designed position and height after the steel sheet piles are pulled out, so that the construction of the concrete tooth wall at the bottom of the canal is completed;
the steel sheet pile positioning device is used for driving a steel sheet pile and simultaneously used for keeping the position accuracy of the steel sheet pile, the positioning device is organized into three parts, the first part is the steel pipe pile which is arranged at a certain distance away from the side line of a slope toe concrete tooth wall structure along the longitudinal direction at intervals, the soil penetration depth of the steel pipe pile is 1-2m, the steel pipe pile exceeds the soil surface by 0.8-1.2m, the second part is upper and lower layers of guide beam angle steel used for a pile driving positioning line of the steel sheet pile, the third part is a positioning device connected between the steel pipe pile and the guide beam angle steel, the positioning device consists of vertical connecting sleeves, horizontal screw sleeves and horizontal positioning screws which are mutually perpendicular, the vertical connecting sleeves and the horizontal screw sleeves are fixedly welded together according to the mutually perpendicular relation, the vertical connecting sleeves of the positioning device can be sleeved on the steel pipe pile to move up and down, rotate and can be fixed, the horizontal positioning screws can rotate in and move back in the horizontal screw, the front end of the horizontal positioning screw is connected with the angle steel of the guide beam through two nuts, so that the three parts of the positioning device can be connected into a whole;
when the positioning device is in place, the position line of the center of the steel pipe pile is calculated according to the sum of the thickness of the steel plate pile, the size of the angle steel of the guide beam, the position of the preset angle steel of the guide beam, the position of the angle steel of the guide beam, the length of a half of the length of a horizontal screw sleeve and the like, after line laying is measured, the steel pipe pile is vertically laid to the designed depth, a vertical connecting sleeve of a position adjusting device is vertically moved and rotated on the steel pipe pile until the position adjusting device reaches the preset height and the horizontal screw sleeve is basically vertical to the structural side line of the toe concrete tooth wall, the position adjusting device and the steel pipe pile are fixed, a horizontal position adjusting screw rod is rotated to penetrate through the horizontal screw sleeve, the front end of the horizontal position adjusting screw rod points to the concrete tooth wall, two connecting nuts for fixing the angle steel of the guide beam are arranged at the front end of the horizontal position adjusting screw rod, and the front end of the, after the steel pipe pile and the position adjusting device of the slope toe concrete tooth wall pouring section are installed, installing and position readjusting are carried out on the guide beam angle steel, so that the side line position of the upper limb side of the guide beam angle steel reaches a preset position, the preset position refers to the position line of the slope toe concrete tooth wall structure side line with the thickness of the steel plate pile and the position line after a pile driving gap, and an upper guide beam angle steel and a lower guide beam angle steel are arranged on each side positioning device and used for facilitating positioning of the steel plate pile;
using an angle steel guide beam as a positioning part, leaving a piling gap of about 5mm, pressing a steel sheet pile close to the angle steel of the positioning guide beam, and adopting a small-sized pile driver to carry out piling, adopting a static pressure pile, wherein the piling depth of the steel sheet pile is 0.4-0.7m greater than the depth of the concrete tooth wall, used for keeping the stability of the lower parts of the steel sheet piles after the earthwork of the slot pit of the tooth wall is excavated, driving the steel sheet piles at the two sides of the concrete tooth wall of the corresponding construction section one by one, then steel sheet piles at two ends of each pouring section of the I-sequence toothed wall are constructed according to the pouring section positions of the toothed wall, the steel sheet piles at the ends are flat steel plates, stiffening ribs are arranged on the back surface of each plate, the width of the concrete tooth wall is slightly smaller than the thickness of the tooth wall, and in the range of a pouring section tooth wall surrounded by steel sheet piles, artificial excavation or narrow-head back shovels are adopted to cooperate with the artificial excavation to excavate to the designed bottom elevation of the toe concrete tooth wall so as to form a toe concrete tooth wall structure space, and the steel sheet piles are equivalent to templates; pouring concrete into the tooth wall by using a concrete hanging tank or a concrete pump, pouring concrete into the tooth wall top at a corresponding pouring section and enabling the concrete to have a certain superelevation, then pulling out steel sheet piles, filling gaps of the structural side lines of the tooth wall formed from bottom to top in the process of pulling out a certain steel sheet pile by using concrete at any time, adopting fluid self-compacting concrete without vibration, and finally performing surface plastering and edge finishing treatment according to the design structural side lines and the top elevation of the concrete tooth wall at the toe; and (3) gradually arranging construction of the slope toe concrete tooth wall in the II sequence along with pouring of the slope toe concrete tooth wall in the I sequence, and performing the same earthwork excavation, concrete pouring, two-side steel sheet pile pulling-out and tooth wall top face-closing edge-finishing operations by utilizing a plurality of sections of closed spaces surrounded by the steel sheet piles on two sides which are already constructed and the poured concrete tooth wall in the I sequence.
Preferably the positioning device further comprises a rotary table, vertical sleeve fixing nuts, vertical sleeve fixing bolts and a connecting plate, wherein the vertical sleeve is sleeved on the outer wall of the steel pipe pile, the vertical connecting sleeve is fixedly welded with the horizontal screw sleeve through the connecting plate, the vertical connecting sleeve fixing nuts are fixedly welded with the vertical connecting sleeve and punch holes on the vertical connecting sleeve wall corresponding to the nut holes, so that the vertical sleeve fixing bolts can pass through the nuts and the vertical connecting sleeve, the rotary table is fixedly welded with the horizontal positioning screw rods, the end parts of the horizontal positioning screw rods are matched with the connecting nuts, the number of the connecting nuts is two, guide beam angle steel is arranged between the connecting nuts, and the bottom of one side of the guide beam angle steel is arranged between the connecting nuts.
Preferably, the distance between the center position of the steel pipe pile and the side line of the tooth socket structure is obtained by adding the thickness of the steel plate pile, the piling gap between the steel plate pile and the positioning guide beam angle steel of 5mm, the side length of the upper limb of the positioning guide beam angle steel, the thickness of a connecting nut, the adjustable length or distance of a positioning screw rod, half of the length of a horizontal screw sleeve and the like, the forward or backward adjustable length of the horizontal positioning screw rod is half of the numerical value obtained by subtracting the thicknesses of two nuts from the length of the horizontal positioning screw rod, the thickness of a single limb of the positioning guide beam angle steel and the length of the horizontal screw sleeve, the adjusting length range is set for accurately positioning the guide beam angle steel, the precision requirement of the piling position of the steel pipe pile can be properly reduced to reduce the construction difficulty, the steel pipe pile can adopt a steel pipe with the diameter of 100mm, the lower end of the steel pipe pile is conical to facilitate piling, the length of the steel pipe, the length of the steel pipe piles driven into the ground is 1.0-1.5m, the spacing between the steel pipe piles is 3-5m, and the steel pipe piles are manually driven or manually driven with the assistance of small machinery after the pile positions are measured and discharged.
Compared with the prior art, the invention has the beneficial effects that: the invention relates to a novel construction method of a slope toe concrete tooth wall of a channel, which overcomes the defects of the prior construction method that the earthwork is over excavated, the over-excavated backfill soil is settled to influence the stability of a side slope structure, the construction cost is high and the like when the height of the slope toe concrete tooth wall of an excavation or half-filling half-excavation channel is more than 0.8m and the soil quality is poor and a groove of the tooth wall needs to be pitched, and realizes the construction of the slope toe concrete tooth wall structure without over-excavation.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
FIG. 1 is a schematic elevation view of a positioning device for construction of a steel sheet pile of a channel toe box wall;
FIG. 2 is a schematic elevation view of a steel sheet pile piling construction at a side close to a side slope of a channel toe tooth wall;
FIG. 3 is a schematic elevation view of a steel sheet pile piling construction at a side of a slope toe tooth wall of a channel close to a channel bottom;
FIG. 4 is a schematic view of a channel toe tooth wall earthwork excavation molding and a finished steel sheet pile upper opening jacking elevation;
FIG. 5 is a schematic vertical sectional view of a channel toe box tooth wall poured with concrete;
FIG. 6 is a schematic elevation view of concrete pouring and forming of a groove toe tooth wall;
FIG. 7 is a schematic view of a channel side slope forming elevation;
FIG. 8 is an enlarged schematic elevation view of the positioning device A for steel sheet pile construction in FIG. 1;
FIG. 9 is a section I-I of FIG. 8;
FIG. 10 is a detailed plan exploded view of a positioning device for steel sheet pile construction;
FIG. 11 is a partial schematic view of a steel sheet pile connection plane;
FIG. 12 is an exploded view of a steel sheet pile connection plane;
the notation in the figure is:
1-steel pipe pile; 2-connecting piece (positioning device); 3-angle steel of a guide beam; 4-toe concrete tooth wall center line; 5-the bottom of the channel; 6-channel slope; 7-steel sheet piles; 8-a pile driver; 9-top support, 10-bottom of concrete tooth wall, 11-toe concrete tooth wall; 21-vertical connecting sleeve, 22-horizontal screw sleeve, 23-rotary table, 24-horizontal positioning screw rod, 25-connecting nut, 26-vertical sleeve fixing nut and 27-vertical sleeve fixing bolt; 71-U-shaped steel sheet piles, 72-n-shaped steel sheet piles, 73-plane connecting gaps between adjacent steel sheet piles, 74-steel sheet piles connecting locking center lines, 75-steel sheet piles, 76-U-shaped steel sheet piles and 77-n-shaped steel sheet piles; 91-supporting cross beams and 92-top support angle steel.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are provided only for illustrating the present invention and are not intended to limit the scope of the present invention.
Referring to fig. 1-12, a method for constructing a concrete tooth wall of a channel toe comprises the following steps: after a channel side slope and the bottom are excavated and formed, and a positioning device of a steel sheet pile 7 is arranged, two side structure lines are designed along a slope toe concrete tooth wall, a specially-made steel sheet pile 7 is driven into the groove through the positioning device, one side of a plurality of connected steel sheet piles 7 close to the concrete tooth wall structure line is a vertical plane, a earthwork within the designed depth range of the slope toe concrete tooth wall between the two steel sheet piles 7 is manually or mechanically driven out, the steel sheet pile 7 is used as a template for concrete tooth wall construction, concrete is poured into a tooth wall space formed by the two steel sheet piles 7, then the steel sheet pile 7 is pulled out, the gap left when the steel sheet pile 7 is pulled out is filled with the concrete, the poured concrete exceeds the designed top surface of the tooth wall by a certain height, the concrete is vibrated and compacted by a flexible shaft vibrator after the steel sheet pile 7 is pulled out, the vibration is not needed if the self-compacted concrete is adopted, the top of the tooth wall is retracted to form a surface finishing edge according to the designed position and the height after the steel, therefore, the construction of the concrete tooth wall at the bottom of the canal is completed, and during the concrete construction, partition and skip construction can be adopted according to the designed segment length of the concrete tooth wall, so that the construction is divided into two-sequence wall segments.
The steel sheet pile positioning device is used for driving a steel sheet pile and simultaneously used for keeping the position accuracy of the steel sheet pile, the positioning device has a three-part structure, the first part is a steel pipe pile 1 which is arranged at a certain distance away from the side line of a slope toe concrete tooth wall structure along the longitudinal direction at intervals, the soil penetration depth of the steel pipe pile 1 is 1-2m, the steel pipe pile 1 exceeds the soil surface by 0.8-1.2m, preferably, the steel pipe pile 1 exceeds the soil surface by 1.0m, the second part is an upper layer of guide beam angle steel 3 and a lower layer of guide beam angle steel 3 which are used for a pile driving positioning line of the steel sheet pile, the third part is a positioning device 2 which is connected between the steel pipe pile 1 and the guide beam angle steel 3, of course, the positioning device 2 can also be called as a connecting piece, the positioning device 2 is composed of a vertical connecting sleeve 21, a horizontal screw sleeve 22, a horizontal screw rod 24 and the like which are vertical connecting sleeve 21 and, the vertical connecting sleeve 21 of the positioning device 2 can be sleeved on the steel pipe pile 1 to move up and down, rotate and be fixed, the horizontal positioning screw 24 can rotate in the horizontal screw sleeve 22 to move forward and backward, the front end of the horizontal positioning screw 24 is connected with the guide beam angle steel 3 through two nuts 25, and thus the three parts of the positioning device can be connected into a whole;
the general design is to the segmentation of channel toe concrete tooth wall according to 15-25m, and the segmentation is the settlement parting between the segmentation, adopts the segmentation to jump the storehouse construction, adopts the segmentation construction, in a construction section of 100~150m, constructs I preface wall section earlier, constructs II preface wall section afterwards:
(1) as shown in figure 1, the construction method of the invention has more outstanding advantages for the construction of an excavation channel or a semi-filled semi-excavated channel because the excavation channel has a larger overbreak range when a concrete tooth wall pit groove at the bottom of the channel adopts slope excavation, and the construction of the concrete tooth wall at the bottom of the channel can be considered before the filling of the channel, at the moment, the concrete tooth wall pit groove slope excavation only has overbreak within the depth range of the tooth wall, and does not have overbreak within the side slope range of the channel.
(2) As shown in fig. 1, 2, 8, 9 and 10, specifically, a row of positioning devices is respectively arranged at two sides of a concrete tooth space, each row of positioning device is composed of a steel pipe pile 1, a positioning device 2 and a guide beam angle steel 3, the positioning device 2 is sleeved and fixed on the steel pipe pile 1, one side of the positioning device 2 is connected with the guide beam angle steel 3, the positioning device 2 and the guide beam angle steel 3 on the steel pipe pile are arranged in an upper layer and a lower layer, the guide beam angle steel 3 is used as a positioning reference for driving a steel plate pile, a vertical connecting sleeve 21 in a connecting piece 2 can move up and down and rotate along the steel pipe pile 1, a horizontal positioning screw 24 in the connecting piece 2 can be adjusted forwards and backwards along a horizontal screw sleeve 22, a connecting nut 25 can also be adjusted forwards and backwards in a small range at the end of the horizontal positioning screw 24, but the horizontal positioning screw 24 is ensured not to exceed the horizontal projection range of the end of the guide beam angle steel, the device can realize more accurate positioning than the construction of the conventional steel sheet pile, and because the depth of the tooth wall (within 2 m) is basically within 2.5 times of the distance between the angle steels of the upper guide beam and the lower guide beam, if the positioning deviation of the steel sheet pile during the pile driving is controlled within 2mm-3mm, the deviation of the steel sheet pile at the bottom of the tooth wall can be controlled within 5mm-8mm, and the requirements of controlling the verticality and the size construction deviation of a concrete structure of the tooth wall can be met.
The preferred positioning device 2 further comprises a turntable 23 and a vertical sleeve fixing nut 26, the vertical sleeve fixing bolt 27 and the connecting plate 28 are arranged, the vertical connecting sleeve 21 is sleeved on the outer wall of the steel pipe pile 1, the vertical connecting sleeve 21 and the horizontal screw sleeve 22 are fixedly welded and connected together through the connecting plate 28, the vertical connecting sleeve fixing vertical sleeve fixing nut 26 is fixedly welded and connected with the vertical connecting sleeve 21, and a hole is formed in the wall of the vertical connecting sleeve 21 corresponding to the hole of the vertical sleeve fixing nut 26, so that the vertical sleeve fixing bolt 27 can be screwed through the vertical sleeve fixing nut 26 and the vertical connecting sleeve 21, the rotary table 23 is fixedly welded with the horizontal positioning screw 24, the end part of the horizontal positioning screw 24 is provided with the connecting nut 25 in a matching manner, the number of the connecting nuts 25 is two, the guide beam angle steel 3 is arranged between the connecting nuts 25, and the bottom of one side of the guide beam;
when the positioning device is in place, the position line of the center of the steel pipe pile 1 is calculated according to the sum of the thickness of the steel plate pile 7, the size of the angle steel 3 of the guide beam, the position of the preset angle steel 3 of the guide beam, the position of the preset angle steel 3 of the guide beam, half of the length of the horizontal screw sleeve 22 and the like, after line laying is measured, the steel pipe pile 1 is vertically laid down to the designed depth, the specific depth is accurate to ensure the stability of the positioning device, the vertical connecting sleeve 21 of the positioning device 2 is vertically moved and rotated on the steel pipe pile 1 until the positioning device 2 reaches the preset height and the horizontal screw sleeve 22 is basically vertical to the structural side line of the slope toe concrete tooth wall, the positioning device 2 and the steel pipe pile 1 are fixed, the horizontal positioning screw 24 is rotated to penetrate through the horizontal screw sleeve 22, the front end of the horizontal positioning screw 24 points to the concrete tooth wall, the front end of the horizontal positioning screw 24 is provided with two connecting nuts 25 for fixing the angle steel 3 of the guide beam, the front end of the horizontal position-adjusting screw rod 24 is rotated to reach a preset position, the steel pipe pile 1 and the position-adjusting device 2 at the slope toe concrete tooth wall pouring section are installed and readjusted to the position of the guide beam angle steel 3 after the installation is completed, the sideline position of the upper limb of the guide beam angle steel 3 reaches the preset position, the preset position refers to the position line of the slope toe concrete tooth wall structure sideline plus the thickness of the steel plate pile 1 and the position line after a piling gap, and the upper guide beam angle steel 3 and the lower guide beam angle steel 3 are arranged on each side positioning device and used for facilitating the positioning of the steel plate pile.
(3) As shown in fig. 2, 8 and 12, the distance from the center of the steel pipe pile 1 to the side line of the tooth space structure is obtained by adding the thickness of the steel plate pile 7, the piling gap 5mm between the steel plate pile 7 and the positioning guide beam angle steel 3, the upper limb side length of the positioning guide beam angle steel 3, the thickness of a connecting nut 25, the adjustable length or distance of the positioning screw 24, and the half length of the horizontal screw sleeve 22, wherein the adjustable length of the horizontal positioning screw 24 which can be adjusted forwards or backwards is the value obtained by subtracting the thicknesses of two nuts 25 from the length of the horizontal positioning screw 24, the single-limb thickness of the positioning guide beam angle steel 3 and the half length of the horizontal screw sleeve 22 [ the adjustable length in front and back can be designed according to 80-120mm, and the length of the corresponding positioning screw 24 is about 300mm ], and the adjustment length range is set for accurately positioning the guide beam angle steel, meanwhile, the precision requirement of the piling position of the steel pipe pile can be properly reduced to reduce the construction difficulty, the steel pipe pile 1 can be a steel pipe with the diameter of 100mm, the lower end of the steel pipe pile 1 is conical to facilitate piling, the length of the steel pipe pile 1 above the bottom of a canal is 100cm, the length of the steel pipe pile 1 driven underground is 1.0-1.5m, the distance between the steel pipe piles 1 is 3-5m, and manual piling or small-sized mechanical auxiliary manual piling is performed after the pile position is measured and released.
(4) As shown in fig. 1, 8 and 9, an upper connecting piece (a positioning device) and a lower connecting piece (a positioning device) 2 are installed on a steel pipe pile 1, the lower positioning device 2 is installed at a position 20cm higher than the bottom of a channel, the upper connecting piece is installed at a position 10cm below the top surface of the steel pipe pile 1, a vertical connecting sleeve 21 of the connecting piece 2 is sleeved on the steel pipe pile 1, the vertical connecting sleeve 21 is adjusted to a preset height and rotated in a direction to enable a horizontal screw sleeve 22 and a horizontal positioning screw 24 to be perpendicular to a side line (not required to be absolutely perpendicular) of a toe concrete tooth wall structure, three vertical sleeve fixing bolts 27 are rotated inwards to jack the steel pipe pile 1 through fixing vertical sleeve fixing nuts 26, and thus the positioning device 2 is fixed on the steel pipe pile 1.
After the steel pipe pile 1 and the position adjusting device 2 in one construction section are well arranged, the guide beam angle steel 3 is installed, the guide beam angle steel adopts L5 multiplied by 5 angle steel, the rotary turntable 23 drives the horizontal position adjusting screw rod 24 to move back and forth, the position of the guide beam channel steel fixed by the connecting nut 25 is adjusted to a preset position, the guide beam angle steel 3 is fixed through the connecting nut 25, the sideline of the guide beam angle steel 3 on the upper limb of the figure reaches the designed position, when deviation exists, the rotary turntable 23 can still drive the horizontal position adjusting screw rod 24 to move back and forth to be adjusted, and the requirement on the height accuracy of the guide beam angle steel 3 is not high (relative to the accuracy of the front and back positions).
(5) As shown in fig. 2, 3, 11 and 12, a steel sheet pile 7 is driven and driven in different construction sections, the bottom of the steel sheet pile 7 is 0.4-0.7m lower than the bottom of the tooth wall, the top of the steel sheet pile 7 is 0.2m higher than the top surface of the steel pipe pile 1, the thickness of the steel sheet pile 7 is 100mm, the width of the U-shaped steel sheet pile is 430mm, the width of the pi-shaped steel sheet pile is 400mm, and the thickness of the steel sheet is 10mm, for the convenience of construction, the steel sheet pile on the side close to the side slope is driven first, the steel sheet pile on the side close to the bottom of the channel is driven, the side lines of the upper limb edges of the upper and lower layers of angle steel 3 of the guide beam are used as a reference line, a pile driver 8 is used for driving the steel sheet pile 7, the steel sheet pile is attached to the angle steel sheet 3 of the guide beam with a gap of 5mm, the steel sheet pile 7 is driven downwards to the designed depth by a static pressure or vibration method, the U-shaped steel sheet pile 71 and the pi-shaped steel sheet pile 72 are driven, when the plane size of the steel sheet pile 7 is designed, a connection gap of 15mm is reserved at the plane connection part of the connected steel sheet piles 7, so that the phenomenon that the plane connection part of two adjacent steel sheet piles is tightly propped when the pile-sheet pile lock catches are connected for piling is avoided, namely, the two adjacent steel sheet piles are only tightly connected at the lock catch part, and the influence of multi-point contact on the verticality, multi-point contact stress deformation and post pile pulling difficulty of the steel sheet piles is avoided. The visible pile perpendicularity, the positional deviation condition of beating in-process are executed to steel sheet pile 7, the number that the continuous root of steel sheet pile hasp is mastered in a flexible way, link to each other with the hasp when piling among each steel sheet pile in each subsection, need not the hasp between each subsection and link to each other, can independently play the first steel sheet pile 7 of this subsection to the transmission of control pile error accumulation, the concrete tooth wall degree of depth of toe is between 0.8~2.0m simultaneously, and the degree of depth is little, also is the advantage of pile slope deviation control.
(6) Excavation and concrete pouring of I-sequence wall section of slope toe concrete tooth wall
As shown in fig. 4, for the slope toe concrete I-sequence tooth wall segment, the steel sheet piles at the end of each I-sequence wall segment are driven after the steel sheet piles at the two sides are driven, and the enclosed space of each I-sequence wall segment is formed by adopting the inward insertion type driving.
And (2) adopting manual excavation or narrow-head back shovels to cooperate with manual excavation in each I-sequence wall section enclosed by the steel sheet piles, excavating to the height of the bottom 10 of the slope toe concrete tooth wall to form a tooth wall structural space, excavating from one end to the other end when a certain section of tooth wall pit slot is excavated, sequentially supporting the top of the steel sheet pile 7 at the position where excavation is finished by adopting top supports 9 for keeping the stability and the position of the steel sheet pile, wherein the distance between the top supports 9 is 1.0-2.0 m.
As shown in fig. 5 and 6, the steel sheet pile 7 is equivalent to a template, concrete is poured into the toe tooth wall 11 by using a concrete bucket or a concrete pump, the concrete is poured into the designed top surface of the tooth wall at a corresponding pouring section and has a certain height, then the steel sheet pile 7 is pulled out, a gap of a side line of the tooth wall structure formed from bottom to top in the process of pulling out a certain steel sheet pile is filled with the concrete at any time, wherein the width of the gap is the thickness of the steel panel plate on the side of the tooth wall of the steel sheet pile, the fluidized self-compacting concrete is adopted without vibration, and finally face-closing edge treatment is carried out according to the designed structure side line and the top height of the toe concrete tooth wall 11.
(7) Excavation and concrete construction of slope toe concrete tooth wall II-sequence wall section
The construction of a II-sequence slope toe concrete tooth wall section is gradually arranged in a certain construction section along with the pouring of the I-sequence slope toe tooth wall section, and the works of digging soil, pouring concrete, pulling out the steel sheet piles at two sides, performing face-closing and edge-trimming treatment on the tooth wall top and the like are performed by utilizing a plurality of closed spaces enclosed by the steel sheet piles at two sides of the tooth wall which are punched and the poured I-sequence tooth wall section.
(8) As shown in fig. 7, after the toe box tooth wall concrete 11 reaches a certain strength, a small triangular soil body (not shown) reserved at the junction of the soil foundation side slope 6 and the tooth wall concrete 11 is excavated to form a complete soil foundation side slope line 6, and the construction of the side slope 12 is performed from bottom to top.
In a word, the construction method mainly comprises the process steps of arranging the positioning device, driving the steel sheet pile, excavating earthwork, pouring the concrete of the tooth wall, pulling out the steel sheet pile, processing the inner side of the top closing surface of the concrete tooth wall, constructing the slope structure and the like.
The vertical connecting sleeve 21 and the horizontal screw sleeve 22 are fixedly welded together through a connecting plate 28, the vertical connecting sleeve fixing vertical sleeve fixing nut 26 is fixedly welded together with the vertical connecting sleeve 21, a hole is formed in the wall of the vertical connecting sleeve 21 corresponding to the hole of the vertical sleeve fixing nut 26, so that a vertical sleeve fixing bolt 27 can pass through the vertical sleeve fixing nut 26 and the vertical connecting sleeve 21 in a screwing mode, and the rotary table 23 is fixedly welded together with the horizontal positioning screw rod 24; the supporting beam 91 is welded with the top support angle steel 92, the outer side distance of the top support angle steel 92 on two sides is equal to the thickness of a concrete tooth wall, the supporting beam 91 adopts angle steel or small groove steel, and the top support angle steel 92 adopts small angle steel.
In addition, fig. 2, 3, 4 are cross-sectional views showing the thickness range of the steel sheet pile 7; fig. 5 is a sectional view showing only a steel panel portion as a concrete form, not showing the entire thickness range of the steel sheet pile.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (3)
1. A construction method of a concrete tooth wall of a channel toe is characterized by comprising the following steps:
after a positioning device of a steel sheet pile is arranged and formed by excavation on the side slope and the bottom of a channel, two side structure lines are designed along a slope toe concrete tooth wall, the steel sheet pile is driven into the steel sheet pile through the positioning device, one side of a plurality of connected steel sheet piles close to the concrete tooth wall structure line is a vertical plane, earthwork within the design depth range of the slope toe concrete tooth wall between the two side steel sheet piles is excavated by adopting manpower or machinery with assistance of manpower, at the moment, the steel sheet pile is used as a template for the construction of the concrete tooth wall, then pouring concrete into a tooth wall space formed by the steel sheet piles at two sides, then pulling out the steel sheet piles to fill gaps left when the steel sheet piles are pulled out, wherein the poured concrete exceeds the designed top surface of the tooth wall by a certain height, vibrating and compacting the concrete by adopting a flexible shaft vibrator after the steel sheet piles are pulled out, and performing surface shrinkage and edge trimming on the tooth wall top according to the designed position and height after the steel sheet piles are pulled out, so that the construction of the concrete tooth wall at the bottom of the canal is completed;
the steel sheet pile positioning device is used for driving a steel sheet pile and simultaneously used for keeping the position accuracy of the steel sheet pile, and comprises three parts, wherein the first part is the steel pipe pile which is arranged at a certain distance away from the side line of a slope toe concrete tooth wall structure along the longitudinal direction at intervals, the soil penetration depth of the steel pipe pile is 1-2m, the steel pipe pile exceeds the soil surface by 0.8-1.2m, the second part is upper and lower layers of guide beam angle steel used for a pile driving positioning line of the steel sheet pile, the third part is a positioning device connected between the steel pipe pile and the guide beam angle steel, the positioning device comprises vertical connecting sleeves, horizontal screw sleeves and horizontal positioning screws which are mutually perpendicular, the vertical connecting sleeves and the horizontal screw sleeves are fixedly welded together according to the mutually perpendicular relation, the vertical connecting sleeves of the positioning device can be sleeved on the steel pipe pile to move up and down, rotate and be fixed, the horizontal positioning screws can rotate in and move back in the horizontal screw sleeves, the front end of the horizontal positioning screw is connected with the angle steel of the guide beam through two nuts, so that the three parts of the positioning device can be connected into a whole;
when the positioning device is in place, the position line of the center of the steel pipe pile is calculated according to the thickness of the steel plate pile, the size of the angle steel of the guide beam, the pile driving gap between the steel plate pile and the angle steel of the guide beam, the position of the preset angle steel of the guide beam which can be adjusted forwards and backwards and half of the length of a horizontal screw sleeve, after line laying is measured, the steel pipe pile is vertically dug to the designed depth, a vertical connecting sleeve of a position adjusting device is vertically moved and rotated on the steel pipe pile until the position adjusting device reaches the preset height and the horizontal screw sleeve is basically vertical to the structural side line of the toe concrete tooth wall, the position adjusting device and the steel pipe pile are fixed, a horizontal position adjusting screw rod is rotated to penetrate through the horizontal screw sleeve, the front end of the horizontal position adjusting screw rod points to the concrete tooth wall, two connecting nuts for fixing the angle steel of the guide beam are arranged at the front end of the horizontal position adjusting screw rod, the horizontal position adjusting screw rod, after the steel pipe pile and the position adjusting device of the slope toe concrete tooth wall pouring section are installed, installing and position readjusting are carried out on the guide beam angle steel, so that the side line position of the upper limb side of the guide beam angle steel reaches a preset position, the preset position refers to the position line of the slope toe concrete tooth wall structure side line with the thickness of the steel plate pile and after a pile driving gap, and the positioning device on each side is provided with an upper guide beam angle steel and a lower guide beam angle steel so as to facilitate positioning of the steel plate pile;
using an angle steel guide beam as a positioning part, reserving a piling gap of 5mm, pressing a steel sheet pile close to the angle steel of the positioning guide beam and driving by using a small-sized pile driver, adopting static pressure pile, wherein the piling depth of the steel sheet pile is 0.4-0.7m greater than the depth of a concrete tooth wall, and the steel sheet pile is used for keeping the lower part of the steel sheet pile after the earthwork of a tooth wall groove is excavated, driving the steel sheet piles at two sides of the concrete tooth wall of a corresponding construction section one by one, then driving the steel sheet piles at two ends of each cast section of the I-order tooth wall according to the cast section position of the tooth wall, wherein the steel sheet pile at the end is a flat steel sheet, and the back of the steel sheet pile is provided with a stiffening rib, the width of the stiffening rib is slightly smaller than the thickness of the tooth wall, and the steel sheet pile is equivalent to a template concrete tooth wall structure space when the steel sheet pile is excavated to the designed bottom elevation of the concrete tooth wall of the toe; pouring concrete into the tooth wall by using a concrete hanging tank or a concrete pump, pouring concrete into the tooth wall top at a corresponding pouring section and enabling the tooth wall top to be ultrahigh to a certain extent, then pulling out steel sheet piles, filling gaps of the structural side lines of the tooth wall formed from bottom to top in the process of pulling out a certain steel sheet pile by using concrete at any time, adopting fluid self-compacting concrete without vibration, and finally performing surface plastering and edge finishing treatment according to the design structural side lines and the top elevation of the concrete tooth wall at the toe; and (3) gradually arranging construction of the slope toe concrete tooth wall in the II sequence along with pouring of the slope toe concrete tooth wall in the I sequence, and performing the same earthwork excavation, concrete pouring, two-side steel sheet pile pulling-out and tooth wall top face-closing edge-finishing operations by utilizing a plurality of sections of closed spaces surrounded by the steel sheet piles on two sides which are already constructed and the poured concrete tooth wall in the I sequence.
2. The construction method of the channel slope toe concrete tooth wall as claimed in claim 1, wherein the positioning device further comprises a rotary table, vertical sleeve fixing screws, vertical sleeve fixing bolts and a connecting plate, the vertical sleeve is sleeved on the outer wall of the steel pipe pile, the vertical sleeve and the horizontal screw sleeve are fixedly welded together through the connecting plate, the vertical sleeve fixing nuts are fixedly welded together with the vertical sleeve and the vertical sleeve wall corresponding to the nut holes is perforated so that the vertical sleeve fixing bolts can pass through the nuts and the vertical sleeve, the rotary table is fixedly welded together with the horizontal positioning screws, the ends of the horizontal positioning screws are provided with connecting nuts in a matching manner, the number of the connecting nuts is two, guide beam angle steels are arranged between the connecting nuts, and the bottoms of one sides of the guide beam angle steels are arranged between the connecting nuts.
3. The channel toe concrete tooth wall construction method according to claim 2, wherein the distance from the center position of the steel pipe pile to the side line of the tooth space structure is obtained by adding the thickness of the steel plate pile, the piling gap between the steel plate pile and the positioning guide beam angle steel of 5mm, the upper limb side length of the positioning guide beam angle steel, the thickness of a connecting nut, the adjustable length or distance of the positioning screw rod, and the half of the length of the horizontal screw sleeve, the forward or backward adjustable length of the horizontal positioning screw rod is the length of the horizontal positioning screw rod minus the thickness of two nuts, the thickness of a single limb of the positioning guide beam angle steel and the length of the horizontal screw sleeve, the adjustable length range is set for accurately positioning the guide beam angle steel, and the precision requirement of the piling position of the steel pipe pile can be properly reduced to reduce the construction difficulty, the steel pipe pile has a diameter of 100mm, the lower end is made into a conical shape to facilitate pile driving, the length of the steel pipe piles above the bottom of the canal is 100cm, the length of the steel pipe piles driven into the ground is 1.0-1.5m, the distance between the steel pipe piles is 3-5m, and manual driving or manual driving assisted by small machinery is carried out after the pile positions are measured and released.
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| CN114197504A (en) * | 2021-12-31 | 2022-03-18 | 中铁一局集团有限公司 | Comprehensive treatment construction method for unstable side slope |
| CN114922138B (en) * | 2022-05-20 | 2024-01-26 | 四川水发建设有限公司 | Concrete lining device for small-section thin-wall U-shaped open channel and construction method thereof |
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