CN105369815A - Steel sheet pile and foundation pit support construction method - Google Patents

Steel sheet pile and foundation pit support construction method Download PDF

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Publication number
CN105369815A
CN105369815A CN201510896984.0A CN201510896984A CN105369815A CN 105369815 A CN105369815 A CN 105369815A CN 201510896984 A CN201510896984 A CN 201510896984A CN 105369815 A CN105369815 A CN 105369815A
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China
Prior art keywords
steel sheet
sheet pile
main body
support
rotating shaft
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CN201510896984.0A
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CN105369815B (en
Inventor
韩文
刘红涛
谷晨
邓志龙
何婷
陈锦
汪福君
杨雯
张庆国
张鑫
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Guangdong Institute of Science and Technology
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/02—Foundation pits
    • E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0026—Metals
    • E02D2300/0029—Steel; Iron

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

The invention relates to the field of underground structure construction, in particular to a steel sheet pile and a construction method for carrying out foundation pit support by adopting the steel sheet pile. The steel sheet pile comprises a pile main body, a concealed bracing, a stop mechanism and a transfer mechanism, wherein side edges of two long sides of the pile main body are provided with locking wellheads; a hinged end of the concealed bracing is hinged with the lower end part of the pile main body through a rotary shaft; a position, far from the hinged end, of the concealed bracing is provided with a stress part; the stress part is used for receiving force for driving the concealed bracing to rotate around the rotary shaft to a supporting position from an inserting position; the stop mechanism is used for stopping the concealed bracing to the inserting position or the supporting position; and when the concealed bracing is positioned at the inserting position, the transfer mechanism is used for transferring acting force to the pile main body to the concealed bracing, so that the concealed bracing is inserted into a soil layer along with the pile main body. The steel sheet pile is adopted to carry out foundation pit support, so that quantity demanded of visible bracings can be reduced, and length of the pile main body of the steel sheet pile is shortened.

Description

Steel sheet pile and base pit stand construction
Technical field
The present invention relates to a kind of steel sheet pile and base pit stand construction, specifically, relate to and a kind ofly there is the steel sheet pile of dark support and adopt this steel sheet pile to carry out the construction method of pattern foundation pit supporting structure.
Background technology
The large-scale deep & thick silt of coastal area ubiquity, because the plasticity of mud is high, cause its load-carrying properties low, can engineering poor, when building as underground structures such as stormwater channel, sewage conduct, communication common trench, need first to apply steel sheet pile supporting, then carry out excavation of foundation pit.
Due to the edge, stake main body two long limit of steel sheet pile being formed with fore shaft, be interconnected and the shape barricade for supporting in a row by fore shaft between plurality of steel plates stake, publication number be CN104652424A, CN1313152A patent document discloses conventional U-shaped steel sheet pile, publication number be CN101954397A patent document discloses conventional Z-shape steel sheet pile.
Fig. 1 shows the cross section of a foundation ditch, the construction method adopting existing steel sheet pile to carry out supporting generally includes following steps: (1) adopts stake machine to insert in soil layer 01 along margin of foundation pit by steel sheet pile 021, insertion have screen-type insertion with by root insertion, stake machine has Static pressure pile driver and Vibation pile placing machine, meets corner and then adopts angle stake; (2) below purlin 023 design elevation is enclosed by digging under the earthwork to first floor, be generally 500 millimeters to 1000 millimeters, welding location, pre-position supporting plate 022 on steel sheet pile 021, location supporting plate 022 is installed first floor and is enclosed purlin 023, then enclosing installation bright support 024 purlin 023 in; (3) repeat step 2 second layer and following layer location supporting plate to be installed, to enclose purlin and bright support, until dig the desired depth to foundation ditch under the earthwork; (4) one deck layer of concrete 03 is laid on bottom foundation ditch, layer of concrete 03 be generally 1 meter thick, then on layer of concrete 01, inside steel sheet pile 021, foundation pit side-wall is constructed, in the process of constructing foundation pit side-wall, from bottom to top, remove bright support 024 layer by layer, enclose purlin 023 and location supporting plate 022, backfill the earthwork outward at foundation pit side-wall, until complete the construction of underground structure and the backfill of the earthwork simultaneously; (5) extractor is adopted to extract steel sheet pile 021.
In above-mentioned work progress, for preventing the lower end of steel sheet pile 021 under the effect of earthwork pressure to lateral bend in foundation ditch, usually require that the cutting depth D of foundation ditch generally should not exceed 1/2 of steel sheet pile length L, generally 1/3 of steel sheet pile length L should not be being exceeded in cutting depth D in current-formed silt layer, therefore, cause the length of steel sheet pile 021 long, material requested amount is large.
Summary of the invention
Main purpose of the present invention is to provide a kind of steel sheet pile with dark support, is intended to reduce in work progress to the demand of bright support and the length specification shortening this steel sheet pile;
Another object of the present invention is to provide a kind of construction method adopting above-mentioned steel sheet pile to carry out pattern foundation pit supporting structure.
In order to realize above-mentioned main purpose, steel sheet pile provided by the invention comprises a main body, dark support, stop mechanism and transmission mechanism.Wherein, two edges, long limit of stake main body are provided with fore shaft; The hinged end of dark support is hinged by the bottom of rotating shaft and stake main body; Dark support is provided with forced section away from hinged end place, and this forced section is for receiving the power driving and secretly support and rotate from insertion position around the shaft to Support Position; Stop mechanism is used for secretly to support backstop in insertion position or Support Position; When dark support is in insertion position, the force transmission that transmission mechanism is used for stake main body to be subject to, to dark support, makes dark support insert in soil layer with stake main body.
From above scheme, because this steel sheet pile has dark support, in employing, it carries out in the work progress of pattern foundation pit supporting structure, by secretly supportting the inner support being formed between two pieces of corresponding steel sheet piles and be positioned at the two bottom together, effectively can reduce bright support demand, and shorten the length of steel sheet pile stake main body.
A concrete scheme is that rotating shaft is fixed in a main body, hinged end is formed with the oval hole of matching with rotating shaft, the major axis in this oval hole, on the length direction of dark support, can slide along the long axis direction in oval hole to make secretly to support phase countershaft, thus change the position of the relative stake main body of dark support; Oval hole is the first end face away from the end face of forced section, and the end face of contiguous forced section is the second end face; Transmission mechanism comprises the outer shoulder be fixed in dark support, forced section is pointed to along hinged end, this outer shoulder is positioned at the downstream in oval hole, when the lower surface of stake main body is against outer shoulder, for there being gap between rotating shaft and the second end face, thus mutually apply active force against to secretly supportting by the lower surface of stake main body and outer shoulder, and in case countershaft damages, the application life of raising steel sheet pile; When rotating shaft is after the first end face, dark support rotates in the process of Support Position from insertion position around the shaft, all has gap between the lower surface of stake main body and outer shoulder.This transmission mechanism structure is simply effective.
One more specifically scheme be that stop mechanism comprises the first block be fixed in a main body, insert the direction of soil layer along stake main body, the first block is positioned at oblique upper or the oblique below of rotating shaft; When dark support is positioned at Support Position, the first block and the side secretly supportted mutually against and will secretly support backstop in Support Position.This stop mechanism structure is simply effective.
Scheme concrete is again that stop mechanism also comprises the second block be fixed in a main body, and insert the direction of soil layer along stake main body, the second block is positioned at the oblique upper of rotating shaft, and is positioned at directly over the first block or oblique upper; When dark support is positioned at insertion position, the side of dark support and the first block or the second block mutually against and secretly will support backstop in insertion position; When rotating shaft is after the first end face, dark support rotates in the process of Support Position from insertion position around the shaft, and end face and the second gear interblock of the hinged end of dark support all have gap.
Another more specifically scheme be that the outer end of outer shoulder extends to form an end wall along the length direction of dark support to the direction near oval hole, end wall, outer shoulder and dark support surround the bracket matched with the bottom of stake main body.Effectively guarantee that dark support is remaining on insertion position with stake main body in the process inserting soil layer.
Another concrete scheme is that rotating shaft is fixed in a main body, and the hinged end of dark support is formed with the oval hole of matching with rotating shaft, and the major axis in oval hole is on the length direction of dark support; Oval hole is the first end face away from the end face of the forced section of dark support, and the end face of contiguous forced section is the second end face; Stop mechanism comprises and is fixed on the first block in a main body and the second block, inserts the direction of soil layer along stake main body, and the first block is positioned at oblique upper or the oblique below of rotating shaft, the second block be positioned at rotating shaft oblique upper and be positioned at the first block oblique upper or directly over; When dark support is positioned at insertion position, the side of dark support and the first block or the second block mutually against and secretly will support backstop in insertion position, rotating shaft and the second end face are mutually against forming transmission mechanism; When rotating shaft is after the first end face, rotate in the process of Support Position around the shaft in dark support from insertion position, end face and the second gear interblock of the hinged end of dark support all have gap; When dark support is positioned at Support Position, the first block and the side secretly supportted mutually against and will secretly support backstop in Support Position.The structure of stop mechanism and transmission mechanism is simply effective.
Another concrete scheme is that stake main body comprises steel pipe, the axis of steel pipe is arranged along the length direction of stake main body, the direction of soil layer is inserted along stake main body, the lower surface of steel pipe forms the first side wall groove and second sidewall channels of the sidewall of through steel pipe along axis indent, the groove depth of the second sidewall channels is greater than the groove depth of the first side wall groove, the two ends of rotating shaft are fixedly connected with the tube wall of steel pipe, and the spacing between rotating shaft and lower surface is less than the groove depth of the first side wall groove; Hinged end is formed with the oval hole of matching with rotating shaft, and the major axis in oval hole is on the length direction of dark support, and oval hole is the first end face away from the end face of forced section, and the end face of contiguous forced section is the second end face; Transmission mechanism comprises the shaft shoulder be located on the sidewall of hinged end, and point to the direction of forced section along hinged end, the shaft shoulder is positioned at the downstream in oval hole, when lower surface is against the shaft shoulder, has gap between rotating shaft and the second end face; When rotating shaft is after the first end face, dark support rotates in the process of Support Position from insertion position around the shaft, gap is had between lower surface and the shaft shoulder, there is gap between the end face of hinged end and the groove bottom of the second sidewall channels, between the side of hinged end and the cell wall of the first side wall groove and the second sidewall channels, has gap; Insert the direction of soil layer along stake main body, side and the tube wall be positioned at above the first side wall groove or above the second sidewall channels of hinged end will secretly support the stop mechanism of backstop in insertion position against forming; The side of hinged end forms will secretly support the stop mechanism of backstop in Support Position against the groove bottom of the first side wall groove.
In order to realize another object above-mentioned, the invention provides a kind of construction method adopting steel sheet pile to carry out pattern foundation pit supporting structure, the steel sheet pile that this construction method adopts comprises a main body, and two edges, long limit of stake main body are provided with fore shaft; Steel sheet pile comprises the first steel sheet pile and the second steel sheet pile, the steel sheet pile of the first steel sheet pile described by above-mentioned arbitrary technical scheme, and the second steel sheet pile is stake main body, does not namely have the steel sheet pile of dark support.The method comprises the following steps: the effective bearing length selecting dark support by foundation ditch width requirement, second end face in the oval hole of dark support to free end end face between spacing be effective bearing length, and stay cord is through forced section; Relative for the dark support of the first steel sheet pile stake main body is placed in insertion position, and squeezes into from precalculated position, by stay cord, pulling force is applied to forced section, dark support is rotated around the shaft to Support Position, extract stay cord out; Squeeze into the second steel sheet pile in the corresponding position of foundation ditch opposite side, the end face of the free end of the dark support of the first steel sheet pile is against the web of the second steel sheet pile of correspondence; In the row's steel sheet pile be mutually permanently connected by fore shaft, between two piece of first adjacent steel sheet pile, be furnished with second steel sheet pile of more than a piece.
Concrete scheme for the first adopted steel sheet pile be above-mentioned concrete scheme, more specifically scheme and the steel sheet pile again described by concrete scheme; After first steel sheet pile is squeezed into soil layer from reservation position, to the stake main body applying pulling force upwards of the first steel sheet pile, this main body is moved up the first distance, and this first distance is more than or equal to the long axis direction moveable distance of rotating shaft along oval hole, then applies pulling force to forced section.
Preferred scheme is the spacing between two of adjacent layout secretly support is four times of the width of the first steel sheet pile to five times.Under guaranteeing secretly to support effective supporting condition, reduce the use amount of dark support, can bear simultaneously and the steel sheet pile of dark for band support is stayed the economic loss caused in soil layer, any because pulling out issuable structural deterioration in steel sheet pile process to avoid part underground structure not to be subject to.
Accompanying drawing explanation
Fig. 1 is the schematic diagram adopting a kind of existing steel sheet pile to carry out pattern foundation pit supporting structure;
Fig. 2 is the structural representation that in steel sheet pile first embodiment of the present invention, dark support is positioned at Support Position;
Fig. 3 is the schematic diagram that in steel sheet pile first embodiment of the present invention, dark support is positioned at insertion position;
Fig. 4 is A-A sectional view in Fig. 3;
Fig. 5 is the view in steel sheet pile first embodiment of the present invention after dark support and the relative movement of stake main body;
Fig. 6 is the view that in steel sheet pile first embodiment of the present invention, dark support is positioned at Support Position;
Fig. 7 be in base pit stand construction first embodiment of the present invention adopt the top view of leading truck;
Fig. 8 is B partial enlarged drawing in Fig. 7;
Fig. 9 is that the C of Fig. 7 is to the view be rotated counterclockwise after 90 degree;
Figure 10 is the schematic diagram that in base pit stand construction first embodiment of the present invention, leading truck coordinates with steel sheet pile;
Figure 11 is the first view in base pit stand construction first embodiment of the present invention;
Figure 12 is the second view in base pit stand construction first embodiment of the present invention;
Figure 13 is the third state schematic diagram in base pit stand construction first embodiment of the present invention;
Figure 14 is the connection diagram of cable wire and the dark forced section supportted in the third state in base pit stand construction first embodiment of the present invention;
Figure 15 is the 4th view in base pit stand construction first embodiment of the present invention;
Figure 16 is the 5th view in base pit stand construction first embodiment of the present invention;
Figure 17 is the 6th view in base pit stand construction first embodiment of the present invention;
Figure 18 is the 7th view in base pit stand construction first embodiment of the present invention;
Figure 19 is the 8th view in base pit stand construction first embodiment of the present invention;
Figure 20 is the 9th view in base pit stand construction first embodiment of the present invention;
Figure 21 is the tenth view in base pit stand construction first embodiment of the present invention;
Figure 22 is the connection diagram of dark support and stake main body in steel sheet pile second embodiment of the present invention;
Figure 23 is the view that in steel sheet pile second embodiment of the present invention, dark support is positioned at Support Position;
Figure 24 is the connection diagram of dark support and stake main body in steel sheet pile of the present invention 3rd embodiment;
Figure 25 is the view that in steel sheet pile of the present invention 3rd embodiment, dark support is positioned at Support Position;
Figure 26 is the structural representation that in steel sheet pile of the present invention 4th embodiment, dark support is positioned at Support Position;
Figure 27 is the structural representation that in steel sheet pile of the present invention 5th embodiment, dark support is positioned at Support Position;
Figure 28 is the layout schematic diagram of the Steel Sheet Pile of base pit stand construction of the present invention 6th embodiment;
Figure 29 is the connection diagram of dark support and stake main body in steel sheet pile of the present invention 8th embodiment;
Figure 30 is that in eighth embodiment of the invention, dark support to rotate the first view to Support Position relative to stake main body from insertion position;
Figure 31 is that in eighth embodiment of the invention, dark support to rotate the second view to Support Position relative to stake main body from insertion position;
Figure 32 is that in eighth embodiment of the invention, dark support to rotate third state schematic diagram to Support Position relative to stake main body from insertion position;
Figure 33 is the connection diagram of dark support and stake main body in ninth embodiment of the invention.
Below in conjunction with embodiment and accompanying drawing thereof, the invention will be further described.
Detailed description of the invention
Steel sheet pile and base pit stand construction first embodiment
See Fig. 2, the first steel sheet pile 1 is the U-shaped steel sheet pile with dark support, and it is made up of stake main body 10, dark support, rotating shaft 12, stop mechanism and transmission mechanism.
Two wing plates 102 of stake main body 10 are mutually orthogonal with web 101, the lateral surface of one of them wing plate 102 are fixed with rotating shaft 12, and the axis of rotating shaft 12 is arranged along the surface direction perpendicular to wing plate 102.The free margins of two wing plates is provided with fore shaft 103.The hinged end of dark support 11 can 12 connect with wing plate 102 is hinged around the shaft rotatably, and dark support 11 is provided with the forced section 111 for overlapping cable wire away from hinged end place, from hinged end more away from better.
See Fig. 3, the hinged end of dark support 11 is formed with an oval hole 112 coordinated with rotating shaft 12, the major axis in oval hole 112 is on the length direction of dark support 11.The free end of rotating shaft 12 is provided with circular rotating shaft baffle plate 121, form to dark support 11 along rotating shaft 12 move axially spacing.The side, side that wing plate 102 is positioned at dark support 11 is provided with the oblique lower position that the first block 105, first block 105 is positioned at rotating shaft 12.
See Fig. 4, an outer shoulder 113 is provided with outside the side of the contiguous wing plate 102 of dark support 11, the outer end of outer shoulder 113 upwards extends to form end wall 114 along the length direction secretly supportting 11, end wall 114, outer shoulder 113 and dark support 11 surround the bracket 115 matched with wing plate 102 bottom, when the lower surface of wing plate 102 is against the groove bottom of bracket 115, namely the lower surface of wing plate 102 is against the table top 1130 of outer shoulder 113, the lower surface in oval hole 112 and rotating shaft 12 matched in clearance, thus the active force of a main body to dark support 11 is applied by the table top of outer shoulder 113.
See Fig. 5, when dark support 11 relative wing plates 102 to move to oval hole 112 upper surface along its length direction is against rotating shaft 12, spacing H between the axle center of rotating shaft 12 and table top 1130 is more than or equal to the interval S between the drift angle A of axle center and wing plate 102 lower end, namely dark support 11 12 is rotated counterclockwise in process around the shaft, there is gap between the lower surface of wing plate 102 and table top 1130, makes can not encounter table top 1130 in the processes of drift angle A 12 rotations around the shaft.
See Fig. 6, by applying pulling force obliquely to forced section, dark support 11 12 to be turned clockwise roughly 90 degree around the shaft, rotate to the position (solid line position) roughly mutually orthogonal with the length direction of stake main body from the lengthwise location (dotted line position) along stake main body, namely rotate to Support Position from insertion position.When dark support 11 is positioned at Support Position, the end sidewalls of its hinged end will against the first block 105, thus backstop secretly supports 11 continuation turns clockwise around the shaft, is about to dark support 11 backstops in Support Position.
Insert in soil layer process at steel sheet pile, use leading truck 2 as shown in Figure 7, to guarantee that steel sheet pile can, roughly along hanging down layout, especially make on the relative both sides of foundation ditch two row's steel sheet piles roughly be parallel to each other.
Leading truck 2 has to be parallel to each other to be arranged and is laid in ground grade beam 211 and 212, grade beam 211 is fixedly connected with column 251,252,253 and 254, grade beam 212 is fixedly connected with column 255,256,257 and 258, column 251 to column 258 is parallel to each other and the plane formed perpendicular to two grade beam center lines.One end of cant beam 241 is fixed on grade beam 211, the other end is fixed on column 251, one end of cant beam 242 is fixed on grade beam 211, the other end is fixed on column 254, one end of cant beam 243 is fixed on grade beam 212, and the other end is fixed on column 255, and one end of cant beam 244 is fixed on grade beam 212, the other end is fixed on column 258, for forming stable triangular support configurations.Be connected with crossbeam 231 between column 252 and column 253, connecting cross beam 232 between column 256 and column 257, be fixedly connected sequentially between column 251,252,256 and 255 4 crossbeams 261; Crossbeam 261 surrounds the pilot hole 201 for leading for steel sheet pile; Be fixedly connected sequentially between column 253,254,258 and 257 4 crossbeams 262, and crossbeam 262 surrounds the pilot hole 202 for leading for steel sheet pile.
See Fig. 8, the medial surface of four crossbeams 262 be fixedly connected with column 253 is all fixedly connected with sheet iron plate 2621, and the medial surface of four crossbeams 262 be fixedly connected with column 254 is all fixedly connected with sheet iron plate 2622.The medial surface of 4 crossbeams be fixedly connected with column 251 or 252 as shown in Figure 7 is all fixedly connected with one piece of sheet iron plate, and the inner surface of sheet iron plate forms the slippery inner surface of pilot hole.
See Fig. 9, in four crossbeams 261 be fixedly connected with column 251 and 255, the spacing between the crossbeam 261 of adjacent layout two is identical.The vertical distance being fixed on the crossbeam on other same root posts is also identical.
The construction method adopting above-mentioned first steel sheet pile 1 to carry out pattern foundation pit supporting structure is as follows:
(1) see Figure 10, leading truck 2 is positioned on the ground flattened, by pilot hole 201, first steel sheet pile 1 direction of motion is led, adopt stake machine to squeeze in soil layer by steel sheet pile 1; As shown in figure 11, squeeze in the process of soil layer at steel sheet pile 1, Fig. 3 is shown the steel sheet pile of state squeezes into soil layer with the attitude secretly supportted down, namely dark support 11 is positioned at insertion position, stake machine applies downward active force to stake main body 10, stake main body 10 is extruded mutually by its lower end surface and the table top being located at the outer shoulder secretly supportted on 11, thus give dark support 11 by downward force transmission, thus promote in dark support 11 insertion soil layer 01, the forced section be located in dark support 11 is walked around in one end of cable wire 13, thus cable wire 13 is also driven in soil layer 01 together.
(2) by stake machine, stake main body is applied to upper pulling force, make its first distance that moves up, this first distance is more than or equal to the long axis direction moveable distance of rotating shaft along oval hole, as shown in figure 12, then by hoist engine, oblique pulling is applied to cable wire 13, this oblique pulling comprises component F to the right and component upwards, thus dark support 11 is rotated counterclockwise around the shaft, until rotate state extremely as shown in fig. 13 that, now, due to the backstop action of the first block, dark support 11 by by backstop in the position roughly mutually orthogonal with stake main body 10, namely dark support 11 is positioned at Support Position, whole process is monitored by the pulling force applied cable wire 13 or is confirmed whether dark support is in Support Position by the mark on cable wire 13.As shown in figure 14, one end 131 of cable wire 13 strides across forced section 111 and is fixedly connected with the other end 132 of cable wire 13 is dismountable afterwards, by secretly support 11 be pulled to Support Position after, being fixedly connected with between dismounting cable wire 13 two ends, cable wire is extracted the state of the rear foundation ditch section of soil layer 01 out as Figure 15 by hoist engine, cable wire will be used for squeezing into of next first steel sheet pile, thus reduces the demand to cable wire.
(3) see Figure 16, the second steel sheet pile 3 is squeezed into by the pilot hole 202 of leading truck 2 as shown in Figure 10, second steel sheet pile 3 only has a main body, namely the steel sheet pile not with dark support, by the guiding of leading truck 2, making between the stake main body of the second steel sheet pile 3 after squeezing into and the dark end face supportting the free end of 11 is matched in clearance, this gap is dug in the process of foundation ditch by the later stage, two block plate stakes are drawn close under earth pressure effect outside foundation ditch, thus between the stake main body making secretly to be supported on supportting 11 accumbency two block plate stakes.Steel sheet pile is squeezed into successively at margin of foundation pit, form two rows steel sheet pile as shown in figure 17, Figure 17 shows that lower row's steel sheet pile to be fastened connection by fore shaft mutually by the second steel sheet pile 3, upper row's steel sheet pile is had the first steel sheet pile 1 spaced with the second steel sheet pile 3 and is fastened by fore shaft and is connected, and the bottom of the stake main body of upper row's steel sheet pile and lower row's steel sheet pile is by secretly supportting 11 forms inner support.
(4) see Figure 18, soil layer being dug for 01 time to enclosing below purlin 41 design elevation, being generally 500 millimeters to 1000 millimeters, welding location, the pre-position supporting plate 42 on the steel sheet pile of both sides, location supporting plate 42 is installed and encloses purlin 41, then enclosing purlin 41 in the bright support 43 of installation.As shown in figure 19, after the installation completing bright support 43, then earth excavation until under dig desired depth to foundation ditch.Owing to having the two-layer inner support of head and the tail, the more shallow degree of depth is only needed to one deck is bright to be supportted, for foundation ditch dark especially, two-layer above bright support support can be adopted.
(5) see Figure 20, the bottom of foundation ditch is laid one deck layer of concrete, then on layer of concrete, foundation pit side-wall is constructed, in the process of constructing foundation pit side-wall, by lower from upper, remove bright support 43 layer by layer, enclose purlin 41 and location supporting plate 42, backfill the earthwork outward at foundation pit side-wall simultaneously, until complete the construction of underground structure, the bright support of each layer, enclose the dismounting of purlin and location supporting plate, and the backfill of the earthwork.
(6) see Figure 21, steel sheet pile is extracted by stake machine, in the process of pulling out the first steel sheet pile, soil layer 01 is extracted together by secretly supportting 11 by stake main body 10, usually because secretly support to be positioned at bottom foundation ditch following about 2 meters, the process of extracting dark support 11 can not touch foundation ditch matrix, even if can touch foundation ditch matrix, owing to being equipped with the layer of concrete of one deck about 1 meter bottom its foundation ditch, can not cause damage to the matrix of foundation ditch.Certain infringement may be caused to foundation ditch matrix for some and this foundation ditch cannot bear the construction of any infringement, the first steel sheet pile can be stayed in soil layer 01.
As shown in table 1, that carries out pattern foundation pit supporting structure for adopting conventional steel sheet pile and above-mentioned first steel sheet pile compares data, and therefrom can find out, the steel sheet pile adopting above-mentioned band secretly to support carries out the length that pattern foundation pit supporting structure can shorten a main body.
The supporting table of comparisons of table 1 the application and conventional steel sheet pile
Above-mentioned outer shoulder 113 forms and will secretly support the stop mechanism of 11 backstops in insertion position together with the first block 105, and the first block 105 forms and will secretly support the stop mechanism of 11 backstops in Support Position.
Steel sheet pile and base pit stand construction second embodiment
As the explanation to steel sheet pile of the present invention and base pit stand construction second embodiment, only the difference with steel sheet pile and base pit stand construction first embodiment is described below.
See Figure 22, rotating shaft 52 and the first block 505 are positioned at isometry position, namely the axis of rotating shaft 52 is positioned on the horizontal symmetrical face 5051 of the first block 505, the upper right corner of the hinged end of dark support 51 is rounding structure, the cross section of rounding structure to be a central angle the be circular arc 510 of 90 degree, circular arc 510 and adjacent end face 513 and side 514 is tangent is connected, when rotating shaft 52 is against the upper surface in oval hole 512, the spacing between the axis of end face 513 and rotating shaft 52 equals the spacing between the medial surface of the first block 505 and the axis of rotating shaft 52.
See Figure 23, when rotating shaft 52 is against the upper surface in oval hole 512, the center of circle of circular arc 510 is positioned on the axis of rotating shaft 52.
Insert in the process of soil layer in dark support 51 with stake main body, due to coordinating of rotating shaft 52 and the first block 505, make secretly to support the length direction of 51 and the length direction roughly keeping parallelism of stake main body, namely secretly support 51 is positioned at insertion position.When dark support 51 is pulled to Support Position, the end face 513 of dark support 51 coordinates with the medial surface of the first block 505, secretly will support backstop in Support Position place.
First block 505 and rotating shaft 52 are formed together will secretly support the stop mechanism of 51 backstops in insertion position, and the first block 505 forms and will secretly support the stop mechanism of 51 backstops in Support Position.
Steel sheet pile and base pit stand construction the 3rd embodiment
As the explanation to steel sheet pile of the present invention and base pit stand construction the 3rd embodiment, only the difference with steel sheet pile and base pit stand construction first embodiment is described below.
Cancel the outer shoulder be located in dark support and the end wall be located on outer shoulder.
See Figure 24, the first block 605 is positioned at the position, oblique upper left side of rotating shaft 62, and the position, oblique upper right side of rotating shaft 62 is provided with the second block 606, and the second block 606 is positioned at the top of the first block 605.
When rotating shaft 62 is against the lower surface in oval hole 612, and when secretly the support length direction of 61 and the length direction of stake main body are roughly parallel to each other, namely dark support 61 is positioned at insertion position, first block 605 and the second block 606 lay respectively at the side of secretly supportting 61 hinged ends, by the two with secretly support cooperatively interacting of the two sides of 61, secretly will support 61 backstops at insertion position place.
See Figure 25, when rotating shaft 62 is against the upper surface in oval hole 612, dark support 61 62 turns clockwise in process around the shaft, the end face of the hinged end of dark support 61 will and the second block 606 between keep matched in clearance.When dark support 61 rotates roughly orthogonal to its length direction and the length direction of stake main body, namely dark support 61 is positioned at Support Position, the upper side of dark support 61 will, against the first block 605, make dark support 61 cannot continue 62 to turn clockwise around the shaft, namely secretly support 61 by backstop at Support Position place.
As shown in figure 24, the lower surface in oval hole 612 and rotating shaft 62 are mutually against the transmission mechanism forming this example, and the stop mechanism of 61 backstops in insertion position will secretly be supportted against forming mutually in the dark 61 hinged end two sides and the first block 605 or the second block 606 of supportting.As shown in figure 25, the upper side and the first block 605 that secretly support the hinged end of 61 will secretly support the stop mechanism of 61 backstops in Support Position against forming mutually.
Steel sheet pile and base pit stand construction the 4th embodiment
As the explanation to steel sheet pile of the present invention and base pit stand construction the 4th embodiment, only the difference with steel sheet pile and base pit stand construction first embodiment is described below.
See Figure 26, the fore shaft 713 of the first steel sheet pile 7 adopts publication number for the locking notch structure disclosed in the patent document of CN104652434A.
Steel sheet pile and base pit stand construction the 5th embodiment
As the explanation to steel sheet pile of the present invention and base pit stand construction the 5th embodiment, only the difference with steel sheet pile and base pit stand construction first embodiment is described below.
See Figure 27, the web of the stake main body 80 of the first steel sheet pile 8 801 is non-orthogonal with wing plate 802, and by welding a floor 803 arranged along stake main body 80 length direction on the inside wall of web 803, the hinged end of dark support 81 is by rotating shaft and floor 803 is hinged connects.
Wherein, floor 803 for being only welded on one section of steel plate on the bottom of web 801, can also can be the steel plate with web 801 equal length.Floor 803 transversal can be T-shaped, is also I shape.
Steel sheet pile and base pit stand construction the 6th embodiment
As the explanation to steel sheet pile of the present invention and base pit stand construction the 6th embodiment, only the difference with steel sheet pile and base pit stand construction first embodiment is described below.
See Figure 28, in upper row's steel sheet pile, three piece of second steel sheet pile 93 is furnished with between two piece of first adjacent steel sheet pile 91, spacing between two adjacent dark supports 911 is four times to five times of the first steel sheet pile 91 width, thus guaranteeing under the prerequisite effectively supported, reducing the demand to dark support, reducing because the first steel sheet pile being stayed the economic loss caused in soil layer meanwhile.
Steel sheet pile and base pit stand construction the 7th embodiment
As the explanation to steel sheet pile of the present invention and base pit stand construction the 7th embodiment, only the difference with steel sheet pile and base pit stand construction first embodiment is described below.
First steel sheet pile is for establishing dark support arrangement to form at publication number for the combined steel sheet pile foundation disclosed in the patent document of CN102414370A increases, its king-pile main body comprises board-like main body and pillar main body, wherein, pillar main body is the i shaped steel structure in this patent document, the hinged end of dark support by rotating shaft and pillar main body hinged.
Steel sheet pile and base pit stand construction the 8th embodiment
As the explanation to steel sheet pile of the present invention and base pit stand construction the 8th embodiment, only the difference with steel sheet pile and base pit stand construction first embodiment is described below.
The structure of stake main body is for adopting publication number to be the tubular structure disclosed in the patent document of CN1837512A.
See Figure 29, tubular structure has steel pipe 94, and dark support 95 is a cylinder, and the port of its hinged end and steel pipe 94 matches and is socketed in the lower port of steel pipe 94.
See Figure 30, dark support is positioned at insertion position.The hinged end of dark support 95 is formed with the shaft shoulder 951, and when hinged end is socketed in steel pipe 94 lower port, the lower surface that the shaft shoulder 951 is resisted against steel pipe 94 forms transmission mechanism, now, rotating shaft 96 has gap with the lower surface in oval hole 952.The two ends of rotating shaft 96 are fixedly connected with steel pipe 94 tube wall by modes such as welding, nut are fixing, and rotating shaft is through being formed on hinged end in oval hole 952.
See Figure 31, when dark support 95 axially moves to rotating shaft 96 against the upper surface in oval hole 952 along it to the direction away from dark support 95,96 to rotate sidewall to hinged end from insertion position against the groove bottom 9411 of the first side wall groove 941 around the shaft under the effect of the pulling force that dark support 95 receives at forced section, be namely positioned at Support Position as shown in figure 32.
See Figure 32, dark support 94 96 to rotate in the process of Support Position from insertion position around the shaft, and have gap between the end face of hinged end and the groove bottom 9421 of the second sidewall channels 942, the groove depth of the second sidewall channels 942 is greater than the groove depth of the first side wall groove 941.
When dark support 94 is positioned at Support Position, the end face of hinge end and the inside wall of steel pipe will secretly support the stop mechanism of 94 backstops in insertion position against forming mutually.When dark support 94 Support Position, position, the end wall of hinged end and the groove bottom 9411 of the first side wall groove 941 will secretly support the stop mechanism of backstop in Support Position against forming mutually.
Steel sheet pile and base pit stand construction the 9th embodiment
As the explanation to steel sheet pile of the present invention and base pit stand construction the 9th embodiment, only the difference with steel sheet pile and base pit stand construction first embodiment is described below.
Cancel the outer shoulder be located in dark support, end wall and oval hole.
See Figure 33, the hinged end of dark support 972 is formed with the axis hole matched with rotating shaft 973, and is hinged in a main body 971 by rotating shaft 973.Stop mechanism is made up of with ejector pin unit the first block 978, and ejector pin unit is made up of pin 974, spring 975 and drag-line 976, and the hinged end end face indent of dark support 972 is formed with the pin-and-hole 977 matched with pin 974.
The elastic restoring force of spring 975 forces pin to be resisted against in pin-and-hole 977, secretly will support 972 backstops in insertion position.
Make pin away from pin-and-hole 977 by drag-line 976, dark support 972 rotates to Support Position from insertion position under the effect of pulling force suffered by forced section, and by the first block 978 backstop in Support Position.
In the various embodiments described above, dark support main body is rod-like structure, and the cross section of rod-like structure can be the shapes such as quadrangle, triangle, circle, ellipse, rhombus.Forced section is not limited to the hanger structure in the various embodiments described above, can also adopt other structures, such as, be welded in hook, annulus on dark support free end, or is formed at the hook-shaped breach on dark support free end.
In the various embodiments described above, other stay cords can be adopted to substitute the forced section of cable wire to dark support and to apply pulling force.
Central scope of the present invention is by setting up dark support arrangement in the stake main body of existing steel sheet pile, to reduce the demand to bright support in work progress, and shorten the length of stake main body, according to this design, the structure of stake main body, forced section, transmission mechanism and stop mechanism also has multiple apparent change.

Claims (10)

1. steel sheet pile, comprises a main body, and two edges, long limit of described stake main body are provided with fore shaft;
It is characterized in that:
Dark support, the hinged end of described dark support is hinged by the bottom of rotating shaft and described stake main body, and described dark support is provided with forced section away from described hinged end place, and described forced section drives described dark support to rotate to the power of Support Position around described rotating shaft from insertion position for receiving;
Stop mechanism, described stop mechanism is used for described dark support backstop in described insertion position or described Support Position;
Transmission mechanism, when described dark support is in described insertion position, the power that described stake main body is subject to is passed to described dark support by described transmission mechanism.
2. steel sheet pile according to claim 1, is characterized in that:
Described rotating shaft is fixed in described stake main body;
Described hinged end is formed with the oval hole of matching with described rotating shaft, and the major axis in described oval hole is on the length direction of described dark support;
Described oval hole is the first end face away from the end face of described forced section, and the end face of contiguous described forced section is the second end face;
Described transmission mechanism comprises the outer shoulder be fixed in described dark support, the direction of described forced section is pointed to along described hinged end, described outer shoulder is positioned at the downstream in described oval hole, when the lower surface of described stake main body is against described outer shoulder, has gap between described rotating shaft and described second end face;
When described rotating shaft is after described first end face, described dark support rotates in the process of described Support Position from described insertion position around described rotating shaft, has gap between described lower surface and described outer shoulder.
3. steel sheet pile according to claim 2, is characterized in that:
Described stop mechanism comprises the first block be fixed in described stake main body, inserts the direction of soil layer along described stake main body, and described first block is positioned at the oblique upper of described rotating shaft or oblique below.
4. steel sheet pile according to claim 3, is characterized in that:
Described stop mechanism also comprises the second block be fixed in described stake main body, and insert the direction of soil layer along described stake main body, described second block is positioned at the oblique upper of described rotating shaft, and described second block is positioned at the top of described first block;
Described rotating shaft is after described first end face, and described dark support rotates in the process of described Support Position from described insertion position around described rotating shaft, and end face and the described second gear interblock of the hinged end of described dark support have gap.
5. steel sheet pile according to claim 2, is characterized in that:
The outer end of described outer shoulder extends to form an end wall along the length direction of described dark support to the direction near described oval hole, and described end wall, described outer shoulder and described dark support surround the bracket matched with the bottom of described stake main body.
6. steel sheet pile according to claim 1, is characterized in that:
Described rotating shaft is fixed in described stake main body;
Described hinged end is formed with the oval hole of matching with described rotating shaft, and the major axis in described oval hole is on the length direction of described dark support;
Described oval hole is the first end face away from the end face of described forced section, and the end face of contiguous described forced section is the second end face;
Described stop mechanism comprises and is fixed on the first block in described stake main body and the second block, the direction of soil layer is inserted along described stake main body, described first block is positioned at the oblique upper of described rotating shaft or oblique below, described second block is positioned at the oblique upper of described rotating shaft, and described second block is positioned at the top of described first block;
Described rotating shaft and described second end face are mutually against forming described transmission mechanism;
Described rotating shaft is after described first end face, and described dark support rotates in the process of described Support Position from described insertion position around described rotating shaft, and end face and the described second gear interblock of the hinged end of described dark support have gap.
7. steel sheet pile according to claim 1, is characterized in that:
Described stake main body comprises steel pipe, the axis of described steel pipe is arranged along the length direction of described stake main body, the direction of soil layer is inserted along described stake main body, the lower surface of described steel pipe forms the first side wall groove and second sidewall channels of the sidewall of through described steel pipe along described axis indent, the groove depth of described second sidewall channels is greater than the groove depth of described the first side wall groove, the two ends of described rotating shaft are fixedly connected with the tube wall of described steel pipe, and the spacing between described rotating shaft and described lower surface is less than the groove depth of described the first side wall groove;
Described hinged end is formed with the oval hole of matching with described rotating shaft, and the major axis in described oval hole is on the length direction of described dark support, and described oval hole is the first end face away from the end face of described forced section, and the end face of contiguous described forced section is the second end face;
Described transmission mechanism comprises the shaft shoulder on the sidewall being located at described hinged end, the direction of described forced section is pointed to along described hinged end, the described shaft shoulder is positioned at the downstream in described oval hole, when described lower surface is against the described shaft shoulder, has gap between described rotating shaft and described second end face;
When described rotating shaft is after described first end face, described dark support rotates in the process of described Support Position around described rotating shaft from described insertion position, gap is had between described lower surface and the described shaft shoulder, there is gap between the end face of described hinged end and the groove bottom of described second sidewall channels, between the side of described hinged end and the cell wall of described the first side wall groove and described second sidewall channels, has gap;
Insert the direction of soil layer along described stake main body, the side of described hinged end with the tube wall be positioned at above described the first side wall groove or above described second sidewall channels against forming the stop mechanism of described dark support backstop in described insertion position;
The side of described hinged end is formed the stop mechanism of described dark support backstop in described Support Position against the groove bottom of described the first side wall groove.
8. base pit stand construction, adopts steel sheet pile to carry out supporting to foundation ditch;
Described steel sheet pile comprises a main body, and two edges, long limit of described stake main body are provided with fore shaft;
Described steel sheet pile comprises the first steel sheet pile and the second steel sheet pile, and described first steel sheet pile is steel sheet pile described in any one of claim 1 to 7, and described second steel sheet pile is described stake main body;
Method comprises:
Select effective bearing length of dark support by foundation ditch width requirement, and stay cord is through forced section;
Relative for the dark support of the first steel sheet pile stake main body is placed in insertion position, and squeezes into from precalculated position, by stay cord, pulling force is applied to forced section, dark support is rotated around the shaft to Support Position, extract stay cord out;
Squeeze into the second steel sheet pile in the corresponding position of foundation ditch opposite side, the end face of the free end of the dark support of the first steel sheet pile is against the web of the second steel sheet pile of correspondence;
In the row's steel sheet pile be mutually permanently connected by fore shaft, between two piece of first adjacent steel sheet pile, be furnished with second steel sheet pile of more than a piece.
9. base pit stand construction according to claim 8, is characterized in that:
Described first steel sheet pile is steel sheet pile described in any one of claim 2 to 7;
After first steel sheet pile is squeezed into from precalculated position, to the stake main body applying pulling force upwards of the first steel sheet pile, this main body is moved up the first distance, and this first distance is more than or equal to the long axis direction moveable distance of rotating shaft along oval hole, then applies pulling force to forced section.
10. base pit stand construction according to claim 8 or claim 9, is characterized in that:
Spacing between two dark supports of adjacent layout is four times of the width of the first steel sheet pile to five times.
CN201510896984.0A 2015-12-07 2015-12-07 Steel sheet pile and foundation pit support construction method Expired - Fee Related CN105369815B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006041049A1 (en) * 2006-09-01 2008-03-06 Pilepro Llc Barrier for e.g. military purpose, has bulkhead components e.g. Z-sheet pile and connection units, supported on surface of ground and connected with one another, such that barrier stands freely
CN203795437U (en) * 2014-04-25 2014-08-27 浙江大学城市学院 Reinforced steel plate pile foundation pit
CN204626377U (en) * 2015-04-30 2015-09-09 连云港市云达建设工程有限公司 W shaped steel plate pile structure
CN205171527U (en) * 2015-12-07 2016-04-20 韩文 Steel sheet pile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006041049A1 (en) * 2006-09-01 2008-03-06 Pilepro Llc Barrier for e.g. military purpose, has bulkhead components e.g. Z-sheet pile and connection units, supported on surface of ground and connected with one another, such that barrier stands freely
CN203795437U (en) * 2014-04-25 2014-08-27 浙江大学城市学院 Reinforced steel plate pile foundation pit
CN204626377U (en) * 2015-04-30 2015-09-09 连云港市云达建设工程有限公司 W shaped steel plate pile structure
CN205171527U (en) * 2015-12-07 2016-04-20 韩文 Steel sheet pile

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