CN214116644U - Foundation ditch channel-section steel sheet pile shaped steel braced system - Google Patents
Foundation ditch channel-section steel sheet pile shaped steel braced system Download PDFInfo
- Publication number
- CN214116644U CN214116644U CN202023015302.6U CN202023015302U CN214116644U CN 214116644 U CN214116644 U CN 214116644U CN 202023015302 U CN202023015302 U CN 202023015302U CN 214116644 U CN214116644 U CN 214116644U
- Authority
- CN
- China
- Prior art keywords
- steel
- foundation pit
- supporting
- groove
- purlin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The utility model discloses a foundation pit channel steel sheet pile profile steel supporting system, which comprises an enclosure structure laid along the inner side wall of a foundation pit groove, an upper supporting structure stretching over the two ends of the notch part of the foundation pit and fixed on the side wall of the upper end of the enclosure structure, and a plurality of lower supporting structures arranged below the mouth part and above the bottom of the foundation pit groove, wherein the two ends of the lower supporting structures are connected with the enclosure structures arranged at the two sides in the foundation pit groove; the lower supporting structure comprises a lower steel enclosing purlin and a lower profile steel supporting beam, the lower steel enclosing purlin and the lower profile steel supporting beam are respectively arranged on the enclosing structure in multiple layers, the lower steel enclosing purlin is connected to the surface of the enclosing structure through bolts along the surrounding direction of the inner side wall of the foundation pit groove, and the lower profile steel supporting beam is arranged in multiple parallel in the width direction of the foundation pit groove. The utility model discloses a construction method can effectively solve and can exert prestressing force to the system of strutting when the excavation depth of foundation ditch groove is darker, can be better prevent that the foundation ditch groove from warping, guarantee that the whole atress of system of strutting is even.
Description
Technical Field
The utility model relates to a foundation ditch groove construction technical field especially relates to a foundation ditch channel-section steel sheet pile shaped steel braced system.
Background
With the rapid development of social economy and the shortage of urban land resources, deep foundation pit (groove) engineering has become a development trend of modern buildings, and the stability of the foundation pit (groove) and the safety and nature of the surrounding environment become the focus of attention of all parties. Under the conditions that the land resources are increasingly tense, the engineering geological conditions are more and more complex, and the environmental protection problem is more and more prominent, the traditional foundation pit (groove) supporting forms, such as slope-laying excavation, cast-in-situ bored piles, retaining walls and reinforced concrete inner supports and the like, can not meet the market requirements. At present, in the construction process of a deep foundation pit (groove), a Larsen steel sheet pile is often adopted for supporting. When the excavation depth of a foundation pit (groove) is deep and the bending resistance of the steel sheet pile is insufficient, a supporting system is required to support and reinforce, and the Larsen steel sheet pile supporting system usually adopts a form of surrounding purlin and horizontal support. The early-used supporting system encloses the purlin and adopts the welded form with horizontal support to be connected, and prestressing force can't be exerted, and control foundation ditch (groove) that can not be better warp, and use the welding as the owner, and the material loss is big, and the low construction quality of turnover rate is not high, leads to construction progress, quality to receive the influence.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a foundation ditch channel-section steel sheet pile shaped steel braced system and construction method, the utility model discloses can effectively solve when the excavation depth of foundation ditch groove is darker, make the steel sheet pile have fine compressive capacity, can exert prestressing force to the system of strutting, can be better prevent that the foundation ditch groove from warping, guarantee that the whole atress of the system of strutting is even, reduce prestressing loss and avoid eccentric stress and stress loss. In order to realize the purpose, the utility model discloses a following technological effect:
according to one aspect of the utility model, a foundation pit channel steel sheet pile profile steel supporting system is provided, which comprises a support structure laid along the inner side wall of a foundation pit groove, an upper support structure stretching over the two ends of the opening part of the foundation pit and fixed on the side wall of the upper end of the support structure, and a plurality of lower support structures arranged below the opening part and above the bottom part of the foundation pit groove, wherein the two ends of the lower support structures are connected with the support structures arranged at the two sides in the foundation pit groove; the lower supporting structure comprises a lower steel enclosing purlin and a lower profile steel supporting beam, the lower steel enclosing purlin and the lower profile steel supporting beam are arranged on the enclosing structure respectively in multiple layers, the lower steel enclosing purlin is connected to the surface of the enclosing structure through bolts along the surrounding direction of the inner side wall of the foundation pit groove, the lower profile steel supporting beam is arranged in the width direction of the foundation pit groove in multiple parallel, and the two ends of the lower profile steel supporting beam are connected with the steel enclosing purlin through the bolts respectively.
In a further preferred mode of the scheme, at least one drainage square culvert is respectively arranged at two ends and two side walls of the bottom of the foundation pit, the enclosure structure comprises a plurality of steel sheet piles which are vertically fastened with each other and are laid on the inner side wall of the foundation pit groove, a plurality of layers of triangular brackets are arranged on the steel sheet pile along the vertical direction, the upper supporting structure and the lower steel purlin are horizontally and correspondingly arranged on each layer of triangular brackets respectively, the two ends of the lower section steel supporting beam are detachably connected with the lower steel purlin through bolts, the lower steel purlin at the bottom of the foundation pit groove is arranged between the inner side wall of the foundation pit groove and the outer wall of the drainage square culvert, an upper steel circulation head is arranged at the middle part and the two ends of the upper steel purlin and at one end part of the upper steel supporting beam, an upper jack is arranged in the upper steel circulation head, one end part of the upper steel supporting beam is in transmission connection with the upper steel purlin through an output shaft of the upper jack.
According to the scheme, the upper supporting structure comprises two upper steel surrounding purlins which parallelly stretch over the groove opening part of the foundation pit and a plurality of upper steel supporting beams which are parallelly connected between the two upper steel surrounding purlins, the upper steel surrounding purlins are arranged on the steel sheet pile along the length direction of the groove opening part of the foundation pit, and the upper steel surrounding purlins are fixed on the outer wall of the steel sheet pile through bolts and cross triangular brackets.
In a further preferable mode of the above scheme, a pull pile is arranged on the outer side around the edge of the opening of the foundation pit groove, an iron chain or an iron pull rope connected with the enclosure structure is arranged on the pull pile, and a fence is arranged on the pull pile.
According to a further preferable scheme, the steel sheet piles are provided with groove bodies, the edges of the groove bodies are provided with buckling wings which are bent outwards, the buckling wings are arranged on the outer sides of the edges of the steel sheet piles along the extending direction of the groove bodies, and each steel sheet pile is mutually spliced and connected in series through the buckling wings.
According to the scheme, the H-shaped supporting steel piles are arranged on the back of the groove body of the adjacent steel plate pile, extend to the bottom from the opening of the foundation pit groove, and are connected with the back of the groove body through bolts or pins.
The above scheme is further preferable, the cross section of the tank body is a triangular, circular arc, square or isosceles trapezoid cross section.
According to the scheme, the two ends of the lower steel supporting beam are connected to the lower steel surrounding purlin through lower steel loose heads respectively, lower jacks are arranged at the middle part and the two ends of the lower steel surrounding purlin on each layer respectively, the lower jacks are arranged at the end part of one end of the lower steel supporting beam, the lower jacks are arranged in the lower steel loose heads, and the end part of one end of the lower steel supporting beam is in transmission connection with the lower steel surrounding purlin through output shafts of the lower jacks.
According to the scheme, the outer side wall of the lower steel circulation head is provided with the reinforced steel plate, and the reinforced steel plate is sequentially connected to the end parts of the lower steel circulation head and the lower section steel supporting beam through bolts.
To sum up, the utility model adopts the above technical scheme, the utility model discloses an following technological effect has:
(1) the utility model discloses a Larsen steel sheet pile and shaped steel support and constitute and strut the system, do not have construction forms such as cement stirring, welding in the traditional handicraft, and the equal reuse of component material has short time limit for a project, low risk, and the high efficiency is easily retrieved characteristics such as.
(2) The steel enclosing purlin and the section steel supporting beam are H-shaped steel with threaded holes, the sections are tightly and firmly spliced, the H-shaped steel is spliced by bolts, the traditional steel structure is not welded, and the construction safety factor is improved. The section steel is provided with a plurality of bolt holes, the triangular support bracket is fixed on the steel sheet pile through high-strength bolts or welded connection, the section steel can be adjusted to be in a horizontal state in real time according to the field requirement, anti-falling measures are not required to be additionally arranged, and the construction process is optimized.
(3) The utility model discloses a steel enclosing purlin and shaped steel supporting beam, including the jack, the adjustable head is equipped with at loose head and supplies voussoir male spout, set up the jack in the spout, the steel encloses purlin and shaped steel supporting beam and sticiss after adjusting through the jack, the steel sheet connection is strengthened to the rethread is firm, it is even to guarantee to strut the whole atress of system, reduce prestressing loss and avoid eccentric atress and stress loss, thereby it is darker to have solved when the excavation depth of foundation ditch groove effectively, make the steel sheet pile have fine bending resistance, can exert prestressing force to the system of strutting, can be better prevent that the foundation ditch groove from warping.
Drawings
Fig. 1 is a schematic sectional structural view of a foundation pit channel steel sheet pile section steel supporting system of the utility model;
fig. 2 is a schematic top view of the steel supporting system for the channel steel sheet pile of the foundation pit of the present invention;
fig. 3 is a schematic view of the installation structure of the lower support structure of the present invention;
fig. 4 is a schematic view of the mounting structure of the upper support structure of the present invention;
fig. 5 is a schematic structural view of the enclosure structure of the present invention;
in the drawing, a foundation pit groove 1, a building enclosure 2, an upper supporting structure 3, a lower supporting structure 4, a drainage square culvert 5, a lower steel winding head 6, a reinforced steel plate 8, a supporting table 10, a pull pile 11, an iron chain or iron pull rope 12, a steel plate pile 20, a triangular bracket 21, an H-shaped supporting steel pile 22, an upper steel purlin 30, an upper steel supporting beam 31, an upper jack 32, an upper steel winding head 33, a groove body 200, a lower steel purlin 40, a lower steel supporting beam 41, a groove body 200 and fastening wings 201.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and by referring to preferred embodiments. It should be understood, however, that the numerous specific details set forth in the specification are merely set forth to provide a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
With reference to fig. 1, 2 and 3, according to the present invention, the support system includes an enclosure structure 2 laid along the inner side wall of the foundation pit groove 1, an upper support structure 3 stretching over both ends of the mouth of the foundation pit groove 1 and fixed on the side wall of the upper end of the enclosure structure 2, and a plurality of lower support structures 4 arranged below the mouth and above the bottom of the foundation pit groove 1, both ends of the lower support structures 4 are connected with the enclosure structures arranged at both sides in the foundation pit groove 1, the enclosure structures 2, the upper support structure 3 and the lower support structure 4 are respectively arranged on the side wall of the foundation pit groove 1, and the side wall of the foundation pit groove 1 is supported by applying prestress, so as to prevent the foundation pit groove from collapsing; the lower supporting structure 4 comprises a lower steel enclosing purlin 40 and a lower steel supporting beam 41, multiple layers of the lower steel enclosing purlin 40 are arranged on the enclosure structure 2 respectively, the lower steel enclosing purlin 40 is connected to the surface of the enclosure structure 2 through bolts along the surrounding direction of the inner side wall of the foundation pit groove 1, multiple lower steel supporting beams 41 which are parallel to each other are arranged in the width direction of the foundation pit groove 1, and the two ends of each lower steel supporting beam 41 are connected with the lower steel enclosing purlin 40 through bolts respectively. The outer side of the periphery of the opening part of the foundation pit groove 1 is provided with a pull pile 11, the pull pile 11 is provided with an iron chain or iron pull rope 12 connected with the enclosure structure 2, the enclosure structure 2 is tensioned through the iron chain or iron pull rope 12 to prevent the enclosure structure 2 from being moved, the pull pile 11 is provided with a fence (not shown) to prevent earth outside the foundation pit groove from entering the foundation pit groove, and a drainage ditch is arranged between the pull pile 11 and the enclosure structure 2 to enable rainwater to flow into the foundation pit groove, prevent the rainwater from brushing the foundation pit groove and prevent the foundation pit groove from collapsing. At least one drainage square culvert 5 is respectively arranged at two ends and two side walls of the bottom of the foundation pit groove 1, the enclosure structure 2 comprises a plurality of steel sheet piles 20 which are vertically buckled with each other and are laid on the inner side wall of the foundation pit groove 1, a plurality of layers of triangular brackets 21 are arranged on the steel sheet pile 20 along the vertical direction, the triangular brackets 21 realize the installation of angle braces and splayed braces, the supporting angle of the triangular bracket 21 is 30 degrees or 45 degrees, the upper supporting structure 3 and the lower steel purlin 40 are horizontally and correspondingly arranged on each layer of the triangular bracket 21, the two ends of the lower profile steel support beam 41 are detachably connected with the lower steel purlin 40 through bolts, the lower steel enclosing purlin 40 at the bottom of the foundation pit groove 1 is arranged between the inner side wall of the foundation pit groove 1 and the outer wall of the drainage square culvert 5, and the drainage square culvert 5 can be used for supporting the lower steel enclosing purlin 40 and can also be used for conveniently draining water or laying some or pipeline electric wires in the drainage square culvert 5; the lower steel purlin 40 arranged in the supporting system of the utility model is positioned at the inner side of the steel sheet pile, the inner support is used for supporting the lower steel purlin 40, and the lower steel purlin 40 and the lower section steel supporting beam 41 form an inner support frame structure system; lower steel encloses the tip below of purlin 40 and sets up triangular bracket 21 on steel sheet pile 20 for steel encloses purlin 40 under the support, makes down steel enclose purlin 40 and hug closely on steel sheet pile 20, and acts on steel sheet pile 20 and contradict on the lateral wall in foundation ditch groove, and triangular bracket 21 and steel sheet pile 20 weld, and triangular bracket 21 brace node all adopts high-strength bolted connection, and overall stability is firm, installs and demolishs the convenience. The triangular bracket 21 can enable the steel enclosing purlin to be in close contact with the steel sheet piles, and meanwhile, the steel enclosing purlin is kept in a horizontal position state, so that the steel supporting beams on the steel enclosing purlin are supported between the enclosing purlin beams in a horizontal state.
In the utility model, as shown in fig. 1 and 4, the upper supporting structure 3 comprises two upper steel purlins 30 which are parallelly spanned at the opening part of the foundation pit groove 1 and a plurality of upper steel supporting beams 31 which are parallelly connected between the two upper steel purlins 30, the upper steel purlins 30 are arranged on the steel sheet pile 20 along the length direction of the opening part of the foundation pit groove 1, and the upper steel purlins 30 are fixed on the outer wall of the steel sheet pile 20 through bolts and a triangular bracket 21; the edges of the mouth parts of the two ends of the foundation pit groove 1 are lower than the edges of the side parts, two ends of an upper steel purlin 30 are made to cross over a support table 10 at the edges of the mouth parts of the two ends of the foundation pit groove 1, an upper steel activating head 33 is arranged at the middle part and two end positions of the upper steel purlin 30 and at one end part of an upper steel supporting beam 31, an upper jack 32 is arranged in the upper steel activating head 33, one end part of the upper steel supporting beam 31 is in transmission connection with the upper steel purlin 30 through an output shaft of the upper jack 32, the upper steel activating head 33 is connected to the end part of one end of the upper steel supporting beam 31, after the upper steel supporting beam 31 is hoisted on the upper steel purlin 30 at the mouth part of the foundation pit groove 1, because the upper jack 32 is arranged in the upper steel activating head 33, the upper jack 32 can be started at the moment to enable the output shaft to push the upper steel purlin 30, so that the upper steel supporting beam 31 is stable and tightly pressed on the upper steel purlin 30 connected to the two sides of the foundation pit groove 1, the upper steel purlin 30 is tightly pressed on the upper end of the steel sheet pile 20 to support and protect the side wall of the upper end of the foundation pit groove 1, and the steel loose head is arranged at the end part of the steel supporting beam to realize that the steel supporting can apply prestress and enhance the supporting rigidity, so that the deformation is well controlled.
As shown in fig. 1 and 5, the steel sheet pile 20 has a trough body 200, fastening wings 201 bent outward are provided at the edges of the trough body 200, the fastening wings 201 are arranged at the outer sides of the edges of the steel sheet pile 20 along the extending direction of the trough body 200, each steel sheet pile 20 is mutually spliced, fastened and connected in series through the fastening wings 201, so that a larsen steel sheet pile structure is formed, and therefore, the steel sheet piles can be mutually spliced and laid on the side wall of the foundation pit groove 1 by hoisting, the dismounting and the mounting are simple, and the stable laying and the mounting can be realized; an H-shaped supporting steel pile 22 is arranged at the back of the groove body 200 of the adjacent steel sheet pile 20, the H-shaped supporting steel pile 22 extends from the opening of the foundation pit groove 1 to the bottom, and the H-shaped supporting steel pile 22 is connected with the back of the groove body 200 through a bolt or a pin, so that the steel sheet pile 20 is convenient to disassemble and assemble; the cross section of the trough body 200 is a triangular, circular arc, square or isosceles trapezoid cross section, and a stone layer or a soil layer can be filled in the trough shape of the H-shaped supporting steel pile 22 and the trough body 200 for stably supporting on the side wall of the foundation pit trough 1; the supporting structure has the advantages that the structural steel supporting beam can be supported between the enclosing purlin beams in a horizontal state, so that the supporting capacity and supporting stability of the structural steel supporting beam on the foundation pit groove are guaranteed, the using amount of the structural steel can be reduced, the construction cost is reduced, earthwork excavation is facilitated, a supporting structure is formed between the groove bodies 200 of the steel sheet piles 20, and the supporting structure has good waterproof and impervious performance, strong waterproof and impervious performance, low cost and high efficiency. The stress loss of the supporting structure can be reduced, the safety and stability of the foundation pit and groove system are ensured, the construction process is simplified, and the construction cost is reduced.
As shown in fig. 1, 3 and 4, two ends of the lower steel supporting beam 41 are respectively connected to the lower steel purlin 40 through a lower steel loose joint 6, a lower jack 7 is respectively arranged at the middle part and two ends of each layer of the lower steel purlin 40 and at one end of the lower steel supporting beam 41, the lower jack 7 is arranged in the lower steel loose joint 6, one end of the lower steel supporting beam 41 is in transmission connection with the lower steel purlin 40 through an output shaft of the lower jack 7, a reinforcing steel plate 8 is arranged on the outer side wall of the lower steel loose joint 6, the reinforcing steel plate 8 is sequentially connected to the lower steel loose joint 6 and the end of the lower steel supporting beam 41 through bolts, the length of the steel loose joint 6 is adjusted after the lower steel supporting beam 41 is placed on the lower steel loose joint 6, then the lower jack 7 can be started to enable the output shaft to push the lower steel purlin 40, and the lower steel supporting beam 41 stabilizes the lower steel supporting beam 41, The lower steel purlins 30 connected to two sides below the opening of the foundation pit groove 1 are pressed tightly, so that the lower steel purlins 40 are pressed tightly on the side walls of the steel sheet piles 20, the side walls below the opening of the foundation pit groove 1 are supported and protected, and the side walls are reinforced through reinforcing steel plates 8 after being adjusted stably; during installation and construction of a supporting frame structure system in the foundation pit groove, the hoisting is placed according to the measurement of a design drawing, the whole support assembly is carried out at the edge of the foundation pit groove 1, then the whole support assembly is hoisted to a specified position, and the support installation is completed by adjusting the fine adjustment support length of the adjustable head. And then, applying prestress by using a jack according to design requirements, and performing construction of other layers after the prestress is applied in place.
Combine fig. 1 to 5, the utility model provides a foundation ditch channel-section steel sheet pile shaped steel braced system's work progress includes following step:
step 1: forming foundation for excavating groove according to construction measurement positioning dataThe pit slot 1 is leveled according to the drawing size requirement of the pit slot 1, the enclosure structure 2 is formed by mutually connecting and splicing steel sheet piles 20, elevation lofting is carried out on the steel sheet piles 20 before installation, marks are carried out on the steel sheet piles 20, the upper steel purlin 30 and the lower steel purlin 40, then the steel sheet piles 20 are hoisted into the pit slot 1 to be inserted to form the enclosure structure 2, and the pile tops of the steel sheet piles 20 are enabled to be higher than the opening part of the pit slot 1 and level to the ground; step 2: according to the marked position, mounting a triangular bracket 21 on the outer wall of the steel sheet pile 20, and splicing the upper steel purlins 30 on the ground, wherein equal-strength connection is required to be ensured; firstly, the spliced upper steel purlin 30 is lifted and placed on a triangular bracket 21, the upper steel purlin 30 is in close contact with a steel sheet pile 20, two ends of the upper steel purlin 30 are guaranteed to stretch across a support table 10 at the edge of two end openings of a foundation pit groove 1, one upper steel supporting beam 31 is arranged along the upper steel purlin 30 every 3-4 meters, one end of the upper steel supporting beam 31 is fixed on the upper steel purlin 30, the other end of the upper steel supporting beam 31 is connected to the upper steel purlin 30 through an upper steel living head 33, so that a supporting structure 3 on the foundation pit groove 1 is formed through splicing, wherein the steel supporting length of the upper supporting beam 31 is 10-30 cm shorter than the width of the foundation pit groove 1, and the elevation deviation of two ends of the upper steel supporting beam 31 is not more than 20mm and L0/600，L0The length of the upper steel support beam;
and step 3: an upper jack 32 is arranged in the upper steel circulation head 33, the upper jack 32 is started to enable an upper steel supporting beam 31 to be stable and tightly press an upper steel surrounding purlin 30 connected to two sides of the foundation pit groove 1, the upper steel surrounding purlin 30 is tightly pressed on the upper end of the steel sheet pile 20, and the side wall of the upper end of the foundation pit groove 1 is supported and protected;
and 4, step 4: when a certain depth is excavated, a first lower supporting structure 4 is formed by installing and splicing the newly-excavated bottom of the foundation pit according to the steps 2 to 3, namely, the spliced lower steel purlin 40 is firstly lifted and placed on a triangular bracket 21, the lower steel purlin 40 is in close contact with a steel sheet pile 20, two ends of the lower steel purlin 40 are supported on supporting tables 10 at two ends of the opening part of the foundation pit groove 1, a lower steel supporting beam 41 is arranged on the lower steel purlin 40 at intervals of 3-4 meters, one end of the lower steel supporting beam 41 is fixed on the lower steel purlin 40, and the other end of the lower steel supporting beam 41 is connected with a supporting platform 10 at the other end of the lower steel supporting beam 40Connect through lower steel swivel head 6 on lower steel purlin 40 to the concatenation forms first under bracing structure 4, wherein, 41 steel shotcrete lengths of shaped steel supporting beam are 10 ~ 30cm than foundation ditch groove width is short, and shaped steel supporting beam both ends elevation deviation is not more than 20mm and L1/600，L1The length of the lower profile steel support beam;
and 5: installing a lower jack 7 in a chute of the lower steel loose joint 6, starting the lower jack 7 to push out a lower steel support beam 41 to apply prestress to the lower steel purlin 40, then pushing a steel wedge into the chute of the lower steel loose joint 6 and striking tightly, wherein the length of the steel wedge extending into the lower steel loose joint 6 is not less than 20cm, so that a lower support structure 4 is installed on each layer of triangular bracket 21, and downward excavation is continued on the first lower support structure 4; when the newly excavated foundation pit groove 1 is excavated to a certain depth, a second lower supporting structure 4 is formed by installing and splicing the bottom of the newly excavated foundation pit groove 1 according to the steps 2 to 3, then foundation pit earthwork excavation is continued, and construction is repeated until the elevation of the bottom of the foundation pit groove reaches the design requirement, wherein the lower jacks 7 are symmetrically and equidistantly arranged on two sides of the supporting axis of the lower steel loose joint 6 and are required to synchronously apply pressure; the pressure of the lower jack 7 is slowly applied, the prestress is required to be a designed value, and after the pressure is stable, the reinforcement connection is carried out again through the reinforced steel plate 8; in the process of applying pressure, when the movable joint or the supporting point is bent or the welding point is cracked, the pressure is removed, the reason is found out and appropriate measures are taken, then the pressure is continuously applied, after the prestress application is finished, the length of the head and the neck of the lower steel movable joint 6 extending out of the lower steel support beam 41 is not more than 30cm, otherwise, channel steel is welded at the two ends of the lower movable joint to fix the lower steel movable joint after the prestress application is finished; after the prestress is applied, a gap between the end part of the lower profile steel support beam 41 and the lower steel purlin 40 is tightly cushioned by a steel plate; when the soil quality is poor or the excavation depth of a foundation pit groove is deep, in order to strengthen the lateral pressure of the steel sheet pile against the foundation soil, an H-shaped supporting steel pile 22 is inserted into the back of the steel sheet pile 20;
step 6: after the foundation pit groove earthwork is excavated to a construction elevation, constructing a concrete cushion layer at the bottom of the foundation pit groove 1, and then constructing a drainage square culvert 5 in the foundation pit groove, wherein when the drainage square culvert 5 collides with a lower section steel support beam 41 to influence construction, a lower support structure 4 can be detached after a bottom plate support changing force transmission belt reaches 70% of a design strength; removing the lower supporting structures 4 from bottom to top, then backfilling earthwork until each lower supporting structure 4, removing the rest lower supporting steel purlin 40 and the lower profile steel supporting beam 41, removing the upper supporting structure 3 after backfilling the earthwork, and pulling out the steel sheet piles 20 and the H-shaped supporting steel piles 22, wherein the length of each steel sheet pile 20 is not more than 6m, and the height between each layer of lower supporting structure 4 is 5m-6m (one lower supporting structure 4 is arranged every 5m-6 m); when the steel support beam is dismantled, a load is gradually unloaded from the lower section steel support beam 41 by using a 100-ton jack, the iron plug is knocked, the wedge block is loosened, the wedge block is taken out, then the lower jack 32 in the steel piston head and the 100-ton jack are sequentially decompressed and are completely loosened, the 100-ton jack is removed, and finally the lower section steel support beam 41 is controlled to be lifted out of the foundation pit groove 1. The utility model discloses a demountable assembly's novel steel sheet pile shaped steel braced system construction method, it is darker to have successfully solved when foundation ditch groove excavation depth, when the bending resistance of steel sheet pile is not enough, braced system welds the support reinforcement, make prestressing force can't apply, can not be better prevent that the foundation ditch groove from warping, it is more economical to realize with the steel volume, the material turnover rate is higher, the more guaranteed green construction of construction quality, the supporting member of its constitution can carry out pre-processing, form standardized component, assemble according to foundation ditch groove size, for example, steel encloses purlin length adoption 3m, 6 m's standard component is assembled in advance, adaptability is strong, it is light nimble to have, the standardization level is high, adapt to the advantage of various foundation ditch groove sizes and different geological conditions, have apparent economic benefits and social, be worth popularizing and applying.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a foundation ditch channel-section steel sheet pile shaped steel braced system which characterized in that: the support system comprises an enclosure structure (2) laid along the inner side wall of the foundation pit groove (1), an upper support structure (3) which stretches across two ends of the opening of the foundation pit groove (1) and is fixed on the side wall of the upper end of the enclosure structure (2), and a plurality of lower support structures (4) which are arranged below the opening and above the bottom of the foundation pit groove (1), wherein two ends of each lower support structure (4) are connected with the enclosure structures arranged on two sides in the foundation pit groove (1); the lower supporting structure (4) comprises a lower steel enclosing purlin (40) and a lower profile steel supporting beam (41), multiple layers of lower steel enclosing purlin (40) are arranged on the enclosure structure (2) respectively, the lower steel enclosing purlin (40) is connected to the surface of the enclosure structure (2) through bolts along the surrounding direction of the inner side wall of the foundation pit groove (1), multiple lower profile steel supporting beams (41) which are parallel to each other are arranged in the width direction of the foundation pit groove (1), and two ends of each lower profile steel supporting beam (41) are connected with the lower steel enclosing purlin (40) through bolts respectively.
2. The foundation pit channel steel sheet pile steel supporting system as claimed in claim 1, wherein: at least one drainage square culvert (5) is respectively arranged at two ends and two side walls of the bottom of the foundation pit groove (1), the enclosure structure (2) comprises a plurality of steel sheet piles (20) which are vertically fastened with each other and are laid on the inner side wall of the foundation pit groove (1), a plurality of layers of triangular brackets (21) are arranged on the steel sheet piles (20) along the vertical direction, the upper supporting structure (3) and the lower steel enclosing purlin (40) are respectively and horizontally and correspondingly arranged on each layer of triangular brackets (21), the upper supporting structure (3) comprises two upper steel enclosing purlins (30) which are parallelly crossed at the opening part of the foundation pit groove (1) and a plurality of upper section steel sections (31) which are parallelly connected between the two upper steel enclosing purlins (30), the upper steel enclosing purlins (30) are arranged on the steel sheet piles (20) along the length direction of the opening part of the foundation pit groove (1), and the upper steel enclosing purlins (30) are fixed on the outer wall of the steel sheet piles (20) through bolts and the triangular brackets (21), the utility model discloses a drainage square culvert structure, including lower shaped steel supporting beam (41), lower shaped steel encloses purlin (40) and can dismantle the connection through the bolt with lower steel encloses purlin (40) in the both ends of lower shaped steel supporting beam (41), the lower steel of foundation pit groove (1) bottom encloses purlin (40) and sets up between the inside wall of foundation pit groove (1) and the outer wall of drainage square culvert (5) go up the middle part and the both ends position of steel enclosing purlin (30) and be provided with steel swivel head (33) at the one end tip of last shaped steel supporting beam (31), be provided with jack (32) in last steel swivel head (33), be connected through the output shaft transmission of jack (32) between this one end tip of last shaped steel supporting beam (31) and last steel enclosing purlin (30).
3. The foundation pit channel steel sheet pile steel supporting system as claimed in claim 1 or 2, wherein: and pull piles (11) are arranged on the outer sides of the periphery of the opening part of the foundation pit groove (1), iron chains or iron pull ropes (12) connected with the enclosure structure (2) are arranged on the pull piles (11), and a fence is arranged on the pull piles (11).
4. The foundation pit channel steel sheet pile steel supporting system as claimed in claim 2, wherein: and pull piles (11) are arranged on the outer sides of the periphery of the opening part of the foundation pit groove (1), iron chains or iron pull ropes (12) connected with the enclosure structure (2) are arranged on the pull piles (11), and a fence is arranged on the pull piles (11).
5. The foundation pit channel steel sheet pile steel supporting system as claimed in claim 4, wherein: an H-shaped supporting steel pile (22) is arranged at the back of the groove body (200) of the adjacent steel sheet pile (20), the H-shaped supporting steel pile (22) extends to the bottom from the opening of the foundation pit groove (1), and the H-shaped supporting steel pile (22) is connected with the back of the groove body (200) through a bolt or a pin.
6. The foundation pit channel steel sheet pile steel supporting system as claimed in claim 5, wherein: the cross section of the trough body (200) is a triangular, circular arc, square or isosceles trapezoid cross section.
7. The foundation pit channel steel sheet pile steel supporting system as claimed in claim 2, wherein: the two ends of the lower steel supporting beam (41) are connected to the lower steel surrounding purlin (40) through lower steel moving heads (6) respectively, each layer of the middle and the two ends of the lower steel surrounding purlin (40) is provided with lower jacks (7) respectively at one end of the lower steel supporting beam (41), the lower jacks (7) are arranged in the lower steel moving heads (6), and one end of the lower steel supporting beam (41) is in transmission connection with the lower steel surrounding purlin (40) through output shafts of the lower jacks (7).
8. The foundation pit channel steel sheet pile steel supporting system as claimed in claim 7, wherein: and a reinforcing steel plate (8) is arranged on the outer side wall of the lower steel loose head (6), and the reinforcing steel plate (8) is sequentially connected to the ends of the lower steel loose head (6) and the lower profile steel supporting beam (41) through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023015302.6U CN214116644U (en) | 2020-12-15 | 2020-12-15 | Foundation ditch channel-section steel sheet pile shaped steel braced system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023015302.6U CN214116644U (en) | 2020-12-15 | 2020-12-15 | Foundation ditch channel-section steel sheet pile shaped steel braced system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214116644U true CN214116644U (en) | 2021-09-03 |
Family
ID=77511321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023015302.6U Active CN214116644U (en) | 2020-12-15 | 2020-12-15 | Foundation ditch channel-section steel sheet pile shaped steel braced system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214116644U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033214A (en) * | 2021-12-15 | 2022-02-11 | 山西五建集团有限公司 | Method for processing interchange bracing type space pile foundation of existing crack ancient urn city door with top-inlaid reconstruction |
| CN114482065A (en) * | 2021-12-09 | 2022-05-13 | 中建八局第二建设有限公司 | Deep foundation pit construction device for newly-built building, close to subway and connected with subway |
-
2020
- 2020-12-15 CN CN202023015302.6U patent/CN214116644U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482065A (en) * | 2021-12-09 | 2022-05-13 | 中建八局第二建设有限公司 | Deep foundation pit construction device for newly-built building, close to subway and connected with subway |
| CN114482065B (en) * | 2021-12-09 | 2023-09-12 | 中建八局第二建设有限公司 | Deep foundation pit construction device for newly-built building adjacent to subway and connected with subway |
| CN114033214A (en) * | 2021-12-15 | 2022-02-11 | 山西五建集团有限公司 | Method for processing interchange bracing type space pile foundation of existing crack ancient urn city door with top-inlaid reconstruction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112627190A (en) | Foundation pit channel steel sheet pile section steel supporting system and construction method | |
| CN112343061B (en) | Ultra-deep silt foundation pit transverse support construction device and construction method | |
| CN214116644U (en) | Foundation ditch channel-section steel sheet pile shaped steel braced system | |
| CN206721894U (en) | A kind of adjustable prestressing apparatus for pattern foundation pit supporting structure | |
| CN108612110A (en) | A kind of Deep Foundation Pit of Metro Stations combined type construction method for supporting | |
| CN111456032B (en) | Foundation pit supporting system and construction method thereof | |
| KR101169462B1 (en) | Top-down construction method using post member | |
| CN208309593U (en) | A kind of steel pipe structure with oblique member | |
| CN213804905U (en) | Bailey beam suspension structure | |
| CN107558483A (en) | A kind of building foundation and its construction method for installing wallboard | |
| CN116608323A (en) | Quick construction equipment and construction method for fully assembled concrete drainage pipeline | |
| CN113585336B (en) | Quick construction method of sinking type concrete mixing station in soft foundation environment | |
| CN213448506U (en) | Plugging structure arranged between foundation pit fender posts | |
| CN114277672A (en) | Large-span prestressed concrete bent cap structure and construction method thereof | |
| CN110552540A (en) | construction method of inverted retaining wall supporting structure of cyclone tank adjacent to existing building | |
| CN217378907U (en) | Deep soft soil pool foundation pit support system for complex land storage yard | |
| CN216865172U (en) | Basement foundation pit support system newly added in existing factory building | |
| CN115822252A (en) | Construction method and supporting structure of limited space ultrahigh batter post | |
| CN218622217U (en) | Self-balancing pressing-in construction device for precast pile | |
| CN218933149U (en) | SMW construction method pile structure | |
| CN113700004B (en) | Deep foundation pit combined support construction device and method thereof | |
| CN214116593U (en) | Combined round wood formwork for pile foundation construction | |
| CN114232601B (en) | Construction method of lower building envelope wall of pipeline | |
| CN212896374U (en) | Foundation pit support structure located in underground space of existing building | |
| CN115478540B (en) | Reserved shield under-pass tunnel open excavation tunnel system and construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 20-23 / F, building 2, Guangxi construction engineering building, 19 Pingle Avenue, Liangqing District, Nanning City, Guangxi Zhuang Autonomous Region, 530200 Patentee after: Guangxi construction engineering group first installation engineering Co.,Ltd. Address before: 20-23 / F, building 2, Guangxi construction engineering building, 19 Pingle Avenue, Liangqing District, Nanning City, Guangxi Zhuang Autonomous Region, 530200 Patentee before: GUANGXI CONSTRUCTION ENGINEERING GROUP NO.1 INSTALLATION Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |