CN110700281B - Deep foundation pit supporting construction process - Google Patents
Deep foundation pit supporting construction process Download PDFInfo
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- CN110700281B CN110700281B CN201911144805.2A CN201911144805A CN110700281B CN 110700281 B CN110700281 B CN 110700281B CN 201911144805 A CN201911144805 A CN 201911144805A CN 110700281 B CN110700281 B CN 110700281B
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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
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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
Abstract
The invention relates to a deep foundation pit supporting construction process, which relates to the technical field of engineering facility construction and comprises the following steps: s100: pre-excavating a groove along the side line of the deep foundation pit and arranging a guard body on a construction site, arranging single-row piles at the inner side of the guard body close to the deep foundation pit, and uniformly distributing the single-row piles along the extension direction of the side wall of the deep foundation pit; s200: arranging a fixing pile on the outer side of the enclosure body far away from the deep foundation pit, wherein the fixing pile is arranged at a position which is more than 5 meters away from the enclosure body in a vertical direction, and the bottom end of the fixing pile is lower than the preset lowest position of the deep foundation pit; s300: and a horizontal steel frame is arranged between the fixed piles and the single-row piles, two ends of the horizontal steel frame are respectively connected with the fixed piles and the single-row piles, and the length direction of the horizontal steel frame is vertical to the side wall of the deep foundation pit. The invention has the effect of improving the verticality of the side wall of the deep foundation pit under the condition of reducing the space occupation in the deep foundation pit.
Description
Technical Field
The invention relates to the technical field of engineering facility construction, in particular to a deep foundation pit supporting construction process.
Background
The deep foundation pit refers to a project with an excavation depth of more than 5 meters, or a depth of less than 5 meters, but with particularly complicated geological conditions, surrounding environment and underground pipelines. In order to ensure the safety of underground construction and the surrounding environment of the foundation pit, a supporting structure is generally required to be established on the side wall of the deep foundation pit and the surrounding environment.
At present, a deep foundation pit supporting structure generally adopts a double-row pile supporting structure, and the double-row pile supporting structure is generally a support structure which is arranged along the side wall of a foundation pit and consists of a steel frame and a crown beam, wherein the steel frame is formed by connecting a front row of supporting piles and a rear row of supporting piles and beams. However, when the depth of the deep foundation pit reaches more than 10 meters, the side wall of the deep foundation pit is more easily inclined towards the double-row piles under the action of the gravity of the soil, and the part of the deep foundation pit exposed on the ground of the deep foundation pit is lengthened after excavation, so that the double-row piles are easily deformed, the double-row piles are more easily inclined, and the verticality of the side wall of the deep foundation pit is reduced.
In order to enhance the stability of the double-row piles, in a deep foundation pit with a depth of more than 10 meters, the prior art generally adopts a mode of supporting the double-row piles on two sides of the deep foundation pit by multiple layers of horizontal steel, so that the stability of the double-row piles is improved, and the supporting force of the double-row piles on the side wall of the deep foundation pit is enhanced. However, the horizontal steel brace is horizontally arranged in the middle of the deep foundation pit, so that the space in the deep foundation pit is occupied, the horizontal steel brace is easy to interfere with the operation of constructors, and the constructors and the excavating equipment are difficult to construct and operate in the foundation pit.
The above prior art solutions have the following drawbacks: the horizontal steel supporting mode and the conventional double-row pile mode are difficult to maintain the verticality of the side wall of the deep foundation pit under the condition of reducing the space occupation in the deep foundation pit.
Disclosure of Invention
The invention aims to provide a deep foundation pit supporting construction process, which can improve the verticality of the side wall of a deep foundation pit under the condition of reducing the occupied space in the deep foundation pit.
The above object of the present invention is achieved by the following technical solutions: a deep foundation pit supporting construction process comprises the following steps: s100: pre-excavating a groove along the side line of the deep foundation pit and arranging a guard body on a construction site, arranging single-row piles at the inner side of the guard body close to the deep foundation pit, and uniformly distributing the single-row piles along the extension direction of the side wall of the deep foundation pit; s200: arranging a fixing pile on the outer side of the enclosure body far away from the deep foundation pit, wherein the fixing pile is arranged at a position which is more than 5 meters away from the enclosure body in a vertical direction, and the bottom end of the fixing pile is lower than the preset lowest position of the deep foundation pit; s300: and a horizontal steel frame is arranged between the fixed piles and the single-row piles, two ends of the horizontal steel frame are respectively connected with the fixed piles and the single-row piles, and the length direction of the horizontal steel frame is vertical to the side wall of the deep foundation pit.
By adopting the technical scheme, the enclosing body is used for preventing soil and water on the ground from entering the deep foundation pit, and meanwhile, the edge of the deep foundation pit is fixed, so that casualties caused by falling of objects such as stones are avoided; the single-row piles are used for fixing the side wall of the deep foundation pit, so that the collapse phenomenon of soil is reduced, and the operation of the deep foundation pit is facilitated; the spud pile borrows power and provides the pulling force that keeps away from the deep basal pit side towards the single row of stake through horizontal steelframe subaerial to this supports single row of stake, avoids single row of stake to be crooked under the deep basal pit lateral wall pressure effect and leads to the straightness decline that hangs down of deep basal pit lateral wall, improves the straightness that hangs down of deep basal pit lateral wall with this under the condition that the reduction took deep basal pit inner space.
The invention is further configured to: the step S100 includes the steps of: s110: a round groove is formed at the corner of the deep foundation pit, a corner pile is arranged in the round groove, and the bottom end of the corner pile is lower than the preset lowest position of the deep foundation pit; s120: and pouring concrete in the circular groove to fix the concrete in the circular groove and the enclosure body.
Through adopting above-mentioned technical scheme, support the corner both sides wall of deep basal pit through the corner stake, avoid deep basal pit corner to take place to sink to this promotes deep basal pit's structural strength.
The invention is further configured to: the step S300 includes the steps of: s310: the horizontal steel frames on the fixing piles at the corners penetrate through the corner piles, the horizontal steel frames are lengthened in a welding mode along the straight line direction to be fixed with the single-row piles adjacent to the corner piles, and the two horizontal steel frames penetrating through the corner piles are distributed in a cross shape.
By adopting the technical scheme, the horizontal steel frame between the single-row piles and the fixed piles at two adjacent sides of the corner pile is distributed in a cross shape, so that the position of the corner pile is defined, and meanwhile, the fixed pile, the corner pile and the single-row pile form a straight line through the horizontal steel frame, so that the deflection of the side wall of the deep foundation pit is reduced, the angles of the two side walls of the corner of the deep foundation pit are kept, and the construction precision is improved; two sections of horizontal steel frames are spliced in a welding mode, so that the installation of the horizontal steel frames is facilitated, and the structural strength of the horizontal steel frames is improved; two directions that each other become 90 degrees contained angles that two spuds are located the corner pile respectively, and two spuds are stretched the single row stake of the adjacent both sides of corner pile respectively to this contained angle that avoids single row stake skew and lead to the both sides lateral wall of deep basal pit changes.
The invention is further configured to: the step S310 further includes the steps of: s321: and a horizontal steel frame is arranged between two adjacent fixing piles of the corner piles.
Through adopting above-mentioned technical scheme, make three horizontal steelframe form triangular stable structure through the horizontal steelframe between the adjacent two spud piles of corner stake to this supports the spud pile from the angle of difference, thereby improves the supporting effect of spud pile to single row stake, corner stake.
The invention is further configured to: the step S310 further includes the steps of: s321: and a horizontal steel frame is arranged between two adjacent single-row piles of the corner piles.
Through adopting above-mentioned technical scheme, make three horizontal steelframe form triangular stable structure through the horizontal steelframe between the adjacent two single row piles of corner stake to this supports single row pile from the angle of difference, thereby improves the support effect to single row pile.
The invention is further configured to: the step S200 includes the steps of: s210: a temporary drainage ditch is arranged on the ground on the peripheral side of the enclosure body; s210: pushing the ground outside the enclosure body into an inclined shape through a bulldozer, enabling the height of the ground to increase progressively in the direction towards the deep foundation pit, and enabling the lowest position of the slope to be located on the side, far away from the deep foundation pit, of the fixing pile; s220: and the outer side ground of the temporary drainage ditch is coated with a waterproof pad.
Through adopting above-mentioned technical scheme, through the setting of interim escape canal, waterproof pad and slope reduce the deposit of rainwater, avoid rainwater infiltration below the earth's surface and lead to the hardness reduction of soil property to this avoids the phenomenon that deep basal pit lateral wall takes place soil erosion and water loss or sinks, avoids earth hardness to descend and leads to earth to reduce the support intensity of spud pile simultaneously, thereby avoids the spud pile crooked and influence the support effect.
The invention is further configured to: and setting the top surface of the enclosure body to be arc-shaped, wherein the convex arc surface of the enclosure body faces the outer side of the deep foundation pit.
Through adopting above-mentioned technical scheme, enclosure top surface is circular-arcly to this makes the rainwater flow to the deep basal pit outside at the guide effect of circular arc top surface when the contact enclosure, with this to avoid the rainwater to pour into the deep basal pit backward, thereby makes things convenient for the construction of deep basal pit.
The invention is further configured to: one side that the spud pile leaned on deep basal pit sets up the base, the base is connected with one section bottom that the spud pile exposes ground the right angle groove is seted up to one side that the base leaned on deep basal pit set up the support ladder in the right angle inslot, the one end of support ladder and the interior wall connection in right angle groove, its other end is connected in the junction of horizontal steelframe and spud pile.
By adopting the technical scheme, one end of the supporting ladder is connected with the inner wall of the right-angle groove, and the other end of the supporting ladder is connected with the connecting part of the horizontal steel frame and the fixing pile, so that a triangular structure is formed among the supporting ladder, the base and the fixing pile, the horizontal steel frame is supported in the height direction through the supporting ladder, the deflection of the fixing pile is reduced, and the construction precision is improved; the support ladder makes things convenient for constructor to scramble and install horizontal steelframe.
The second purpose of the invention is to provide a mounting structure of a horizontal steel frame, which can facilitate the mounting of the horizontal steel frame.
The above object of the present invention is achieved by the following technical solutions: the utility model provides a mounting structure of horizontal steelframe, includes and supports tight backing sheet with the spud pile, one side that horizontal steelframe was kept away from to the spud pile is provided with the clamping piece, be provided with the retaining member between clamping piece and the backing sheet.
Through adopting above-mentioned technical scheme, connect backing sheet and clamping piece through the retaining member to this connection spud pile and horizontal steelframe, with this installation of making things convenient for horizontal steelframe.
The invention is further configured to: the retaining member includes the bolt that passes backing sheet and clamping piece threaded connection, the bolt symmetric distribution is in the both sides of spud pile.
Through adopting above-mentioned technical scheme, the bolt is used for connecting backing sheet and clamping piece to this connection spud pile and horizontal steelframe, with this installation of making things convenient for horizontal steelframe.
In conclusion, the beneficial technical effects of the invention are as follows:
the fixing piles are used for supporting the single-row piles by means of force on the ground and providing pulling force towards the side far away from the deep foundation pit for the single-row piles through the horizontal steel frame, so that the situation that the single-row piles are inclined under the action of the pressure of the side wall of the deep foundation pit to cause the reduction of the verticality of the side wall of the deep foundation pit is avoided, and the verticality of the side wall of the deep foundation pit is improved under the condition that the occupied space in the deep foundation pit is reduced;
the two fixing piles are respectively positioned in the direction that two of the corner piles form an included angle of 90 degrees with each other, and the two fixing piles respectively stretch the single-row piles on two adjacent sides of the corner piles, so that the included angles of the side walls on two sides of the deep foundation pit caused by the fact that the single-row piles are inclined are prevented from changing;
through the setting up of interim escape canal, waterproof pad and slope reduce the deposit of rainwater, avoid rainwater infiltration below the earth's surface and lead to the hardness reduction of soil property to this avoids the phenomenon that the deep basal pit lateral wall takes place soil erosion and water loss or sinks, avoids earth hardness to descend and leads to earth to reduce the support intensity of spud pile simultaneously, thereby avoids the spud pile crooked and influence the supporting effect.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
Reference numerals: 1. a deep foundation pit; 11. a temporary drainage ditch; 12. an enclosure; 2. single row of piles; 21. corner piles; 22. fixing the pile; 23. a horizontal steel frame; 24. a support sheet; 25. a clip; 26. an anchor rod; 3. a locking member; 31. a bolt; 4. a base; 41. a right-angle groove; 42. a support ladder; 43. a jack.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the deep foundation pit supporting construction process disclosed by the invention comprises the following steps: step S100: firstly, a groove is pre-dug along the edge of the deep foundation pit 1 in a construction site, and concrete is poured in the groove to form the enclosure body 12. The top surface of enclosure 12 is circular-arcly, and its convex arc face towards the deep basal pit 1 outside to this makes the rainwater flow to the deep basal pit 1 outside under the guide effect of circular arc top surface when contact enclosure 12, with this avoid the rainwater to flow backward into deep basal pit 1 and influence the construction, and the border of fixed deep basal pit 1 avoids objects such as stones to fall and causes the injures and deaths simultaneously.
Then, a hole is drilled in the enclosure body 12 close to the inner side of the deep foundation pit 1, a single row of piles 2 are poured in the drilled hole, the bottom ends of the single row of piles 2 are lower than the preset depth of the deep foundation pit 1, the single row of piles 2 are evenly distributed along the extending direction of the side wall of the deep foundation pit 1 and are circumferentially distributed around the deep foundation pit 1, and the view of fig. 1 is an angle view of the deep foundation pit 1. The side wall of the deep foundation pit 1 is parallel to the arrangement direction of the adjacent single-row piles 2, and the side wall of the deep foundation pit 1 is not more than one meter away from the single-row piles 2, so that a concrete pouring space is reserved.
Step S110: a circular groove is formed in the edge of the deep foundation pit 1, an edge pile 21 is arranged in the circular groove, and the bottom end of the edge pile 21 is lower than the preset lowest position of the deep foundation pit 1. S120: and pouring concrete in the circular groove to ensure that the concrete in the circular groove and the enclosure body 12 are poured and fixed. The side corner piles 21 are used for supporting the side walls of the side corners of the deep foundation pit 1, so that the side corners of the deep foundation pit 1 are prevented from collapsing, and the structural strength of the deep foundation pit 1 is improved.
Set up stock 26 between two adjacent single row piles 2, stock 26 level inserts in the 1 lateral wall of deep basal pit, and the one end that stock 26 exposes is crossed with single row pile 2, carry out the ligature through the reinforcing bar to stock 26 and single row pile 2, and carry out concrete casting along the array direction of single row pile 2, cover the intersection of stock 26 and single row pile 2, thereby fixed stock 26 and single row pile 2, promote the supporting effect of stock 26 and single row pile 2 to the 1 lateral wall of deep basal pit.
Step S200: keep away from the outside of deep basal pit 1 at enclosure 12 and set up spud pile 22, spud pile 22 is unanimous with the mounting means of single file stake 2, and its bottom is less than deep basal pit 1 and predetermines the lower to this area of contact who improves spud pile 22 and earth, and then promotes joint strength, avoids spud pile 22 to take place crooked phenomenon. The spud pile 22 sets up in the position that is greater than 5 meters apart from enclosure 12 vertical distance to this reduces the extrusion influence to the earth between spud pile 22 and the deep basal pit 1, avoids spud pile 22 because of with the deep basal pit 1 between the lateral wall between the soil layer too thin and make the phenomenon that the deep basal pit 1 lateral wall takes place to topple over.
S210: set up interim escape canal 11 on the week side ground of enclosure 12, interim escape canal 11 inner wall is concave arc, and interim escape canal 11 encircles enclosure 12 and distributes, and pipeline and external intercommunication are passed through to one side of interim escape canal 11 to this rainwater that falls on convenient clearance enclosure 12. S210: then the earth outside the enclosure 12 is pushed to be inclined by the bulldozer, that is, the height of the earth increases gradually along the direction towards the deep foundation pit 1, and the lowest part of the slope is located at the side of the fixing pile 22 far away from the deep foundation pit 1.
S220: the outer side of the temporary drainage ditch 11 is covered with a waterproof pad (not shown), and the waterproof pad is made of PVC. Temporary drainage ditch 11, waterproof pad and slope intercombination reduce the intraformational rainwater that infiltrates through drainage, waterproof and diversion three kinds of modes to this avoids rainwater infiltration below the earth's surface and leads to the hardness reduction of soil property, with this phenomenon of avoiding 1 lateral wall of deep basal pit to take place soil erosion and water loss or collapse, avoids earth hardness to descend and leads to earth to reduce the support intensity of spud pile 22 simultaneously, thereby avoids spud pile 22 crooked and influence the supporting effect.
Referring to fig. 1 and 2, step S300: set up horizontal steelframe 23 between spud pile 22 and single row of stake 2, horizontal steelframe 23 width direction's cross-section is square, and wholly is rectangular form, and its length direction is perpendicular with deep basal pit 1 lateral wall. Two ends of the horizontal steel frame 23 are respectively connected with the fixing piles 22 and the single-row piles 2. The horizontal steel frame 23 in step 300 is provided with a support sheet 24 abutting against the fixing pile 22, one side of the fixing pile 22 away from the horizontal steel frame 23 is provided with a clamping sheet 25, one side of the support sheet 24 abutting against the fixing pile 22 is arc-shaped, two ends of the clamping sheet are bent to be parallel to the radial direction of the cylindrical fixing pile 22, the clamping sheet 25 is symmetrically distributed with the support sheet 24 along the radial direction of the fixing pile 22, and two ends of the clamping sheet are opposite to two ends of the support sheet 24.
A locking member 3 is arranged between the clamping piece 25 and the supporting piece 24, and the locking member 3 comprises a bolt 31 which penetrates through the supporting piece 24 and is in threaded connection with the clamping piece 25. The bolts 31 are symmetrically distributed at two ends of the clamping piece 25 to connect the supporting piece 24 and the clamping piece 25, so as to connect the fixing pile 22 and the horizontal steel frame 23, thereby facilitating the installation of the horizontal steel frame 23.
And one side of spud pile 22 near deep basal pit 1 is provided with base 4, and base 4 adopts the reinforcing bar to weave and forms and consolidate the shaping through concrete placement, and its bottom surface and slope ground contact, and base 4 and spud pile 22 expose one section bottom on ground through concrete placement fixed. One side that base 4 leaned on deep basal pit 1 has seted up right-angle groove 41, is provided with support ladder 42 in the right-angle groove 41, and support ladder 42 adopts the steel construction to this improves structural strength, is provided with the ladder on it, can make things convenient for constructor to climb to support piece 24 department and install horizontal steelframe 23.
One end of the supporting ladder 42 is opposite to the inner wall of the right-angle groove 41, a jack 43 is arranged between the supporting ladder 42 and the inner wall of the right-angle groove 41, and the jack 43 is fixed with the base 4 through screws and used for supporting one end of the supporting ladder 42. And the other end of the supporting ladder 42 is hinged at the joint of the horizontal steel frame 23 and the fixing pile 22. A triangular structure is formed among the supporting ladder 42, the base 4 and the fixing pile 22, so that the horizontal steel frame 23 is supported in the height direction through the supporting ladder 42, the deflection of the fixing pile 22 is reduced, and the construction precision is improved.
Step S310: the horizontal steel frame 23 on the fixing pile 22 at the corner penetrates through the corner pile 21, the horizontal steel frame 23 is lengthened in a welding mode along the linear direction so as to be fixed with the single-row pile 2 adjacent to the corner pile 21, the horizontal steel frame 23 is convenient to mount in a mode of splicing two sections of horizontal steel frames 23, and meanwhile, the structural strength of the horizontal steel frame 23 is improved. And two horizontal steel frames 23 that pass on the corner pile 21 are criss-cross and are distributed to this position of limiting corner pile 21, make the spud pile 22, corner pile 21 and single row of pile 2 form a straight line through horizontal steel frame 23 simultaneously, with this crooked of reducing deep basal pit 1 lateral wall, keep the angle of deep basal pit 1 corner both sides wall simultaneously, improve the precision of construction.
The single-row piles 2 at the corners are connected with the two fixing piles 22 outside the right-angle sides through the horizontal steel frames 23, and the two horizontal steel frames 23 are perpendicular to each other. And two fixing piles 22 located in the direction of two mutually 90-degree included angles of the corner piles 21 respectively penetrate through the corner piles 21 and are connected with the single-row piles 2 on two adjacent sides of the corner piles 21, so that the included angles of the side walls on two sides of the deep foundation pit 1 caused by the fact that the single-row piles 2 are inclined are avoided being changed.
Step S311: set up horizontal steelframe 23 between two adjacent spud piles 22 of corner stake 21, the both ends of horizontal steelframe 23 weld respectively on two spud piles 22 to this makes three horizontal steelframe 23 form right angled triangle's stable structure through horizontal steelframe 23 between two adjacent spud piles 22 of corner stake 21, supports spud pile 22 with this angle from the difference, thereby improves spud pile 22 to the support effect of single row of stake 2, corner stake 21. In another embodiment, step S311: set up horizontal steelframe 23 between two adjacent single-row piles 2 in corner stake 21 to this cooperation corner stake 21 and two adjacent single-row piles 2 between horizontal steelframe 23, make three horizontal steelframe 23 form right angled triangle's stable structure, with this angle from the difference support single-row pile 2, thereby improve the support effect to single-row pile 2.
The implementation principle of the embodiment is as follows: the single-row piles 2 are used for fixing the side wall of the deep foundation pit 1, so that the collapse phenomenon of soil is reduced, and the operation of the deep foundation pit 1 is facilitated; the anchor rods 26 are used for fixing the side wall of the deep foundation pit 1, so that the deflection phenomenon of the single-row piles 2 after the deep foundation pit 1 is dug is avoided. The spud pile 22 is subaerial borrows power and provides the pulling force of keeping away from deep basal pit 1 side to single row stake 2 through horizontal steelframe 23, support single row stake 2 with this, avoid single row stake 2 crooked and lead to the straightness decline that hangs down of deep basal pit 1 lateral wall under the effect of deep basal pit 1 lateral wall pressure, promote the straightness that hangs down of deep basal pit 1 lateral wall, and horizontal steelframe 23 is located the border and the outside of deep basal pit 1, be difficult to influence the construction in the deep basal pit 1, consequently, the occupation of construction area in the deep basal pit 1 has been reduced, the practicality has been promoted. And the fixed piles 22 on the two sides of the corner pile 21 support the right-angled side wall of the deep foundation pit 1 through the horizontal steel frame 23, so that the included angle of the two side walls of the deep foundation pit 1 is kept while the corner pile 21 is fixed, and the construction precision is improved.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (7)
1. A deep foundation pit supporting construction process is characterized in that: the method comprises the following steps: s100: pre-excavating a groove along the side line of the deep foundation pit (1) in a construction site and arranging a surrounding body (12), arranging single-row piles (2) on the inner side of the surrounding body (12) close to the deep foundation pit (1), and uniformly distributing the single-row piles (2) along the extension direction of the side wall of the deep foundation pit (1);
the step S100 includes the steps of: s110: a round groove is formed at the corner of the deep foundation pit (1), a corner pile (21) is arranged in the round groove, and the bottom end of the corner pile (21) is lower than the preset lowest position of the deep foundation pit (1);
s120: concrete is poured in the circular groove, so that the concrete in the circular groove and the enclosure body (12) are poured and fixed;
s200: the outer side of the enclosure body (12) far away from the deep foundation pit (1) is provided with a fixed pile (22), the fixed pile (22) is arranged at a position which is more than 5 meters away from the enclosure body (12) in a vertical distance, and the bottom end of the fixed pile (22) is lower than the lowest preset position of the deep foundation pit (1);
s300: a horizontal steel frame (23) is arranged between the fixed piles (22) and the single-row piles (2), two ends of the horizontal steel frame (23) are respectively connected with the fixed piles (22) and the single-row piles (2), and the length direction of the horizontal steel frame (23) is perpendicular to the side wall of the deep foundation pit (1);
the step S300 includes the steps of: s310: the horizontal steel frames (23) on the fixing piles (22) at the corners penetrate through the corner piles (21), the horizontal steel frames (23) are lengthened in a welding mode along the linear direction to be fixed with the single-row piles (2) adjacent to the corner piles (21), and the two horizontal steel frames (23) penetrating through the corner piles (21) are distributed in a cross shape;
one side that spud pile (22) leaned on deep basal pit (1) sets up base (4), base (4) are connected with one section bottom that spud pile (22) expose ground base (4) are leaned on one side of deep basal pit (1) to set up right-angle groove (41) set up support ladder (42) in right-angle groove (41), the one end of support ladder (42) and the interior wall connection of right-angle groove (41), its other end is connected in the junction of horizontal steelframe (23) and spud pile (22).
2. The deep foundation pit supporting construction process according to claim 1, characterized in that: the step S310 further includes the steps of: s311: and a horizontal steel frame (23) is arranged between two adjacent fixing piles (22) of the corner piles (21).
3. The deep foundation pit supporting construction process according to claim 1, characterized in that: the step S310 further includes the steps of: s311: a horizontal steel frame (23) is arranged between two adjacent single-row piles (2) of the corner piles (21).
4. The deep foundation pit supporting construction process according to claim 1, characterized in that: the step S200 includes the steps of: s210: a temporary drainage ditch (11) is arranged on the ground on the peripheral side of the enclosure body (12);
s210: pushing the ground outside the enclosure body (12) into an inclined shape by a bulldozer, increasing the height of the ground along the direction towards the deep foundation pit (1), and enabling the lowest part of the inclined slope to be positioned at the side of the fixing pile (22) far away from the deep foundation pit (1);
s220: the outer side ground of the temporary drainage ditch (11) is covered with a waterproof pad.
5. The deep foundation pit supporting construction process according to claim 1, characterized in that: the top surface of the enclosure body (12) is set to be arc-shaped, and the convex arc surface faces the outer side of the deep foundation pit (1).
6. The mounting structure of the horizontal steel frame is applied to the deep foundation pit supporting construction process of any one of claims 1 to 5, and is characterized in that: include support piece (24) that support tightly with spud pile (22), one side that horizontal steelframe (23) was kept away from in spud pile (22) is provided with clamping piece (25), be provided with retaining member (3) between clamping piece (25) and support piece (24).
7. The mounting structure of a horizontal steel frame according to claim 6, wherein: retaining member (3) are including passing backing sheet (24) and clamping piece (25) threaded connection's bolt (31), bolt (31) symmetric distribution is in the both sides of spud pile (22).
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| CN206768834U (en) * | 2017-04-20 | 2017-12-19 | 中南勘察设计院（湖北）有限责任公司 | A kind of deep basal pit combined support structure |
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| KR100866162B1 (en) * | 2008-08-14 | 2008-10-30 | 이재호 | Chair-type self-supported earth retaining wall constructing method |
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| CN106013172B (en) * | 2016-07-01 | 2018-02-27 | 新宇建设有限公司 | Double-row pile combines Deep Foundation Pit Support for Soft Soil structure and construction method with diagonal brace |
| CN207525758U (en) * | 2017-11-24 | 2018-06-22 | 湖南广播电视大学 | A kind of reinforced Structure About Soldier Pile |
| CN108951650B (en) * | 2018-07-28 | 2020-07-21 | 江苏地基工程有限公司 | Support-free deep foundation pit supporting system |
| CN109797755B (en) * | 2019-03-20 | 2021-02-26 | 安徽省第二建筑工程有限公司 | Steel pipe Larsen steel sheet pile enclosure structure supported by steel mesh frame and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206768834U (en) * | 2017-04-20 | 2017-12-19 | 中南勘察设计院（湖北）有限责任公司 | A kind of deep basal pit combined support structure |
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