CN111395351B - Assembled supporting structure of foundation pit and supporting construction method - Google Patents
Assembled supporting structure of foundation pit and supporting construction method Download PDFInfo
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- CN111395351B CN111395351B CN202010116141.5A CN202010116141A CN111395351B CN 111395351 B CN111395351 B CN 111395351B CN 202010116141 A CN202010116141 A CN 202010116141A CN 111395351 B CN111395351 B CN 111395351B
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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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Abstract
The invention provides a foundation pit assembled supporting structure which comprises a plurality of prefabricated supporting sections, a conversion part and a tensioning assembly, wherein each prefabricated supporting section comprises a supporting section and two end plates, the two end plates are respectively positioned at two end parts of the supporting section, the two adjacent prefabricated supporting sections are spliced through the end plates, the prefabricated supporting sections positioned at the end parts are provided with sealing plates, the sealing plates are detachably connected with the corresponding end plates, and the tensioning assembly is positioned on the outer side of cast-in-place concrete; a supporting construction method is further provided, and the fabricated supporting structure is adopted. According to the invention, the assembled supporting structure is formed by splicing a plurality of prefabricated supporting sections, so that the assembling type supporting structure is good in integrity, strong in deformation resistance, green and environment-friendly, and convenient to construct, and can meet the requirement of bearing compressive stress, and can be recycled and reused.
Description
Technical Field
The invention relates to foundation pit construction, in particular to a foundation pit assembled supporting structure and a supporting construction method.
Background
At present, the foundation pit support structure mainly comprises a soil retaining component and a support, wherein the soil retaining component is most commonly a cast-in-situ bored pile, an underground continuous wall and the like. The adopted support type is that the first support is mostly made of reinforced concrete support, the rest supports are steel pipe supports (if the foundation pit is deep or the external environment is complex, a plurality of concrete supports can be arranged), the concrete supports and the top beams (waist beams) form a whole, the deformation resistance is strong, and the concrete supports often become the final barrier of the instability and the damage of the foundation pit. The reinforced concrete supports are constructed by adopting cast-in-place concrete, the construction process is complex, the speed is low, the concrete supports are temporary structures, and the concrete supports need to be chiseled out and cannot be recycled at the later stage, so that a large amount of redundant waste building rubbish is formed, resources are wasted, the environment is polluted, and time, labor and money are wasted. Although the steel pipe props can be retrieved, it is comparatively convenient to be under construction, but can only bear compressive stress between its and foundation ditch retaining structure, and the wholeness is relatively poor, and resistance to deformation ability is poor, becomes the weak link of foundation ditch safety.
Disclosure of Invention
The invention aims to provide a foundation pit assembled supporting structure and a supporting construction method, and aims to solve the problems of troublesome treatment resistance and poor deformation resistance of the conventional foundation pit support.
The invention is realized in the following way:
the embodiment of the invention provides a foundation pit assembled supporting structure which comprises a plurality of prefabricated supporting sections capable of being sequentially spliced, a conversion part capable of being detachably mounted on one of the prefabricated supporting sections to be opposite to a foundation pit crown beam and a tensioning assembly capable of abutting against the crown beam and the conversion part, wherein each prefabricated supporting section comprises a supporting section and two end plates which are oppositely arranged, the two end plates are respectively positioned at two end parts of the supporting section, the two adjacent prefabricated supporting sections are spliced through the end plates, the prefabricated supporting section positioned at the end part is provided with a sealing plate which is opposite to the crown beam and is connected with the crown beam through cast-in-place concrete, the sealing plate is detachably connected with the corresponding end plate, and the tensioning assembly is positioned at the outer side of the cast-in-place concrete.
Further, the tensioning assembly comprises a jack and a cushion column which can be positioned on the same line with the jack.
Further, the number of the tensioning assemblies is at least two, and the tensioning assemblies are uniformly arranged along the circumferential direction of the sealing plate.
Further, the support section is shaped steel, shaped steel includes two H shaped steel, and two H shaped steel welds into two H shaped steel structures side by side, two H shaped steel is located two between the end plate.
Furthermore, a stiffening plate is arranged on the section steel, and the conversion piece is detachably mounted on the stiffening plate of the prefabricated support section at the end part.
The embodiment of the invention also provides a supporting construction method, which adopts the assembly type supporting structure and specifically comprises the following steps:
selecting prefabricated support sections with different lengths according to the section type of the prefabricated support, and conveying the prefabricated support sections to a construction site;
connecting each prefabricated support segment according to the width of the foundation pit;
pouring a top beam, and embedding a U-shaped steel plate and an embedded steel bar;
the spliced prefabricated support sections are transported to corresponding positions of the crown beams and placed on the pre-buried U-shaped steel plates;
the conversion part is fixedly arranged on the prefabricated support sections, the tensioning assembly is arranged between the conversion part and the crown beam, and the connection gap between the prefabricated support sections is eliminated by adjusting the tensioning assembly;
the tensioning assembly is released, and the conversion piece is disassembled for recycling;
connecting the sealing plate and the embedded steel bars, and then connecting and fixing the sealing plate and the end plates of the prefabricated support sections at the end parts;
pouring post-cast concrete by taking the U-shaped steel plate and the sealing plate as templates;
when the supporting structure plays a role and needs to be dismantled, the connection relation between the sealing plate and the prefabricated supporting segments and between the prefabricated supporting segments is removed, and the prefabricated supporting segments are reused.
Furthermore, the tensioning assembly comprises a cushion column and a jack, one end of the jack jacks a conversion piece, the other end of the jack jacks a top beam tightly through the cushion column, the jack is adjusted to eliminate a connection gap between the prefabricated support sections, and after the adjustment is finished, the jack is loosened, a cushion block is installed, and the jack is recovered.
Furthermore, a shear key is arranged on one side, facing the crown beam, of the sealing plate, and the sealing plate is connected with the end plates of the prefabricated support segments at the end positions through anchor bolts.
Furthermore, the closing plate is clamped in the U-shaped steel plate.
Furthermore, the prefabricated supporting section at one end position is matched with the conversion piece by adopting a tensioning assembly, and the prefabricated supporting section at the other end position is abutted against the corresponding crown beam.
The invention has the following beneficial effects:
according to the invention, the fabricated supporting structure is formed by splicing a plurality of prefabricated supporting sections, the integrity is good, the bearing compressive stress between the foundation pit retaining structures can be met, the deformation resistance is stronger, and each prefabricated supporting section can be recycled and reused and can be spliced in advance, so that the fabricated supporting structure is green and environment-friendly and is very convenient to construct. Particularly, the U-shaped steel plate and the sealing plate are enclosed to form the template for pouring post-cast concrete, the template does not need to be additionally arranged, construction is simple, and the contradiction between the length fixation of the prefabricated support segment and the width change of the foundation pit can be eliminated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a gantry crane hoisting fabricated support structure provided by an embodiment of the invention;
FIG. 2 is a top view of a prefabricated support segment provided by an embodiment of the present invention;
FIG. 3 is a side view of a prefabricated support segment provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of a fabricated structure and a crown beam provided by an embodiment of the present invention;
FIG. 5 is a sectional view taken along line 1-1 of FIG. 4 when the jack is tightened;
FIG. 6 is a cross-sectional view taken along line 1-1 of FIG. 4 after completion of construction;
FIG. 7 is a cross-sectional view taken along line 2-2 of FIG. 4 when the jack is tightened;
FIG. 8 is a cross-sectional view taken along line 2-2 of FIG. 4 after the construction is completed;
fig. 9 is a schematic view of an arrangement structure of U-shaped steel plates and reinforcing steel bars according to an embodiment of the present invention;
FIG. 10 is a side view of a conversion member provided in accordance with an embodiment of the present invention;
fig. 11 is a front view of a conversion member provided in accordance with an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-5, an embodiment of the present invention provides an assembled supporting structure for a foundation pit, including a plurality of prefabricated supporting segments 1, where the prefabricated supporting segments 1 may be spliced together to form a prefabricated supporting structure, mainly used for supporting a crown beam 2 or a wale in the foundation pit, the crown beam 2 is taken as an example hereinafter, a U-shaped steel plate 12 is disposed on the crown beam 2, the U-shaped steel plate 12 is pre-embedded when the crown beam 2 is poured, the two ends of the prefabricated supporting structure are respectively positioned and connected with the U-shaped steel plates 12 of the two crown beams 2, the assembled supporting structure further includes a converter 17 and a tensioning assembly 6, where the converter 17 is detachably mounted on one of the prefabricated supporting segments 1, and when the converter 17 is mounted on the prefabricated supporting segments 1, the converter 17 directly faces the crown beam 2, the tensioning assembly 6 may be disposed between the crown beam 2 and the converter 17, and the two ends of the tensioning assembly 6 respectively abut against the crown beam 2 and the converter 17, the structure for thinning the prefabricated support sections 1 comprises a support section 3 and two end plates 5, wherein the support section 3 is in a long strip shape, the two end plates 5 are respectively positioned at two end parts of the support section 3, the section size of each end plate 5 is larger than that of the support section 3, the two adjacent prefabricated support sections 1 are spliced through the end plates 5, specifically, the two adjacent end plates 5 of the two prefabricated support sections 1 are attached and then locked by adopting high-strength bolts 8, the assembled support structure further comprises a sealing plate 7, the sealing plate 7 is detachably arranged on the end plates 5 of the prefabricated support sections 1 at the end parts, specifically, the sealing plate 7 is detachably arranged on the end plate 5 at one side, facing the crown beam 2, of the prefabricated support sections 1 at the end parts, namely, when the sealing plate 7 is arranged on the end plates 5, the sealing plate 7 is over against the crown beam 2, specifically, the effect of sealing the end surfaces of U-shaped steel plates 12 can be achieved, in fact, when the crown beam 2 is poured, the steel bar 13 is embedded, the steel bar 13 is positioned in the U-shaped steel plate 12, the steel bar 13 and the closing plate 7 can be connected and fixed, the closing plate 7, the U-shaped steel plate 12 and the crown beam 2 enclose to form a formwork, concrete is poured into the formwork, and the tensioning assembly 6 is positioned outside the cast-in-place concrete, that is, the tensioning assembly 6 is arranged outside the closing plate 7. In the invention, the fabricated supporting structure can be applied to a foundation pit, can support a crown beam 2, has stronger anti-deformation capability, is mainly formed by splicing a plurality of prefabricated supporting sections 1, can be assembled outside the pit, is then directly placed on a pre-embedded U-shaped steel plate 12 of the crown beam 2 after being hoisted by a gantry crane 20, only needs to be connected with end joints, and the U-shaped steel plate 12 and a closing plate 7 form a post-cast strip template without an additional template, is convenient to construct, can eliminate the contradiction between the fixed length of the prefabricated supporting sections 1 and the width change of the foundation pit, and can recycle each prefabricated supporting section 1 of the fabricated supporting structure after the construction is finished, thereby not only being green and sustainable, but also effectively reducing the cost.
Referring to fig. 5-8, the structure of the tensioning assembly 6 is detailed, and it includes a jack 15 and a pad column 16, and when in use, the two are located on the same straight line, specifically, one end of the pad column 16 is abutted against the crown beam 2, the other end is abutted against the jack 15, and the other end of the jack 15 is abutted against the conversion member 17, and the gap between the prefabricated support sections 1 can be realized by controlling the jack 15. Generally, there are at least two sets of tensioning elements 6, and there may be a one-to-one relationship between the converting elements 17 and the tensioning elements 6, or there may be a converting element 17 for each tensioning element 6, and each tensioning element 6 is uniformly arranged along the circumference of the sealing plate 7 and should be located outside the sealing plate 7, when there are two sets of tensioning elements 6, one tensioning element 6 is located at the left side of the sealing plate 7, and the other tensioning element 6 is located at the right side of the sealing plate 7.
Referring to fig. 2-4 and 10-11, in order to optimize the above embodiment, the supporting section 3 is a section steel, the section steel includes two H-section steels, the two H-section steels are welded side by side to form a double H-section steel structure, the two H-section steels are located between the two end plates 5, and the length direction of the H-section steel is the length direction of the supporting section 3. In addition, the structural steel is provided with batten plates 10, the batten plates 10 are sequentially distributed at intervals along the length direction of the structural steel, the structural steel is provided with stiffening ribs 4, particularly, the structural steel of the prefabricated support section 1 matched with the crown beam 2 is provided with the stiffening ribs 4, the stiffening ribs 4 are positioned at the end part of one side of the structural steel, which faces the crown beam 2, and are abutted against the corresponding end plate 5, a plurality of stiffening ribs 4 are arranged at the position, the stiffening ribs 4 can be divided into two types, one type of stiffening rib 4 is horizontally extended from two ends of an upper flange and a lower flange of the structural steel, namely, extended along the width direction, the other type of stiffening rib 4 is formed by vertically extending the end parts of the upper flange and the lower flange, the stiffening ribs 4 of the upper flange and the lower flange at the same side are positioned on the same straight line and are connected into a whole, the structural steel is positioned in the stiffening ribs 4 from the section, of course, the two types of stiffening ribs 4 are sequentially distributed at intervals along the length direction of the structural steel, and stiffening plates 19 are further fixed on the structural steel, the stiffening plate 19 is located the level and extends and be located between the upper and lower flange of shaped steel, through batten plate 10, stiffening rib 4 and stiffening plate 19, can effectively improve the holistic stability of prefabricated support section 1, specifically, the arrangement mode of batten plate 10 and stiffening rib 4, for example size, number and interval can be set for according to actual need to guarantee that prefabricated support section 1 can satisfy the stability requirement. In a preferred embodiment, the conversion element 17 is detachably mounted on the stiffening plate 19, in particular, the conversion element 17 has a connecting groove, the stiffening plate 19 is inserted into the connecting groove and then fixedly connected by the connecting bolt 18, generally, the conversion element 17 is only fixedly mounted on the stiffening plate 19 of the prefabricated support segment 1 at the end position, the connecting bolt 18 has sufficient shear strength, and the conversion element 17 and the stiffening plate 19 pass the construction stage strength test. Of course, the support section 3 may also be in other forms, such as round steel pipe, square steel pipe, steel pipe concrete, or reinforced 13 concrete.
Referring to fig. 1 to 11, an embodiment of the present invention further provides a supporting construction method, where the fabricated supporting structure is used to implement foundation pit construction, and the method specifically includes the following steps:
according to the section type of the prefabricated support, prefabricated support sections 1 with different lengths are selected, and the required prefabricated support sections 1 can be prefabricated in a prefabricated field and conveyed to a construction site;
connecting the prefabricated support sections 1 according to the width of the foundation pit, specifically, connecting the opposite end plates 5 of two adjacent prefabricated support sections 1 by adopting high-strength bolts 8 to form a prefabricated support, wherein the length of the prefabricated support is less than the width of the foundation pit;
the method comprises the following steps of pouring a top beam 2 in a foundation pit, pre-burying a U-shaped steel plate 12 and a steel bar 13 when the top beam 2 is poured, wherein the U-shaped steel plate 12 is of a steel structure and is provided with a U-shaped groove, a groove opening faces upwards, one end opening of the U-shaped steel plate is blocked by the top beam 2, the other end opening of the U-shaped steel plate is open, a right angle is formed between the groove bottom and the groove wall of the groove, the steel bar 13 is located in the U-shaped groove and can be distributed in an array mode, the length of the U-shaped steel plate 12 is slightly longer than that of post-poured concrete 11, the U-shaped steel plate can be used as a supporting point of a prefabricated support, the thickness is not required to be too large, and the corresponding weight can be supported;
the spliced prefabricated supports are transported to corresponding positions of the crown beams 2 and placed on the pre-buried U-shaped steel plates 12, specifically, a foundation pit is excavated to the bottom of each crown beam 2, and the prefabricated support sections 1 at the two end parts of each prefabricated support are respectively placed on the corresponding U-shaped steel plates 12 of the crown beams 2 which are oppositely arranged through a gantry crane 20;
the conversion part 17 is installed and fixed on the prefabricated support section 1, specifically, the conversion part 17 is installed and fixed on a stiffening plate 19 of the prefabricated support section 1 at the end part position, then the tensioning component 6 is arranged between the conversion part 17 and the crown beam 2 and is used for eliminating a connecting gap between the prefabricated support sections 1 by adjusting the tensioning component 6, the tensioning component 6 comprises a jack 15 and a cushion column 16, one end of the cushion column 16 abuts against the crown beam 2, the other end of the cushion column abuts against the jack 15, the other end of the jack 15 abuts against the conversion part 17, the connecting gap between the prefabricated support sections 1 can be eliminated by adjusting the jack 15, the cushion column 16 is micro-expansion concrete, and the deformation between the prefabricated support sections is reduced by adopting the jack 15 for pre-pressing and the micro-expansion concrete;
the tensioning assembly 6 is released, the conversion piece 17 is disassembled, specifically, the jack 15 is loosened, the cushion block is installed, the jack 15 is recovered, the connecting bolt 18 is unscrewed, and the conversion piece 17 is disassembled for recycling;
the sealing plate 7 and the embedded steel bars 13 are connected in a welding mode, a shear key 14 is arranged on one side of the sealing plate 7 facing the embedded steel bars 13, then the sealing plate 7 is connected and fixed with the end plates 5 of the prefabricated support segments 1 at the end positions, specifically, the sealing plate is connected by an anchor bolt 9, most of structures of the anchor bolt 9 are located on one side of the sealing plate 7, and the sealing plate 7 is just clamped in the U-shaped groove on the corresponding side, so that the other end of the U-shaped groove is blocked;
enclosing a U-shaped steel plate 12, a sealing plate 7 and a crown beam 2 to form a template, and then pouring post-cast concrete 11 in the template, wherein the reinforcing steel bars 13 are positioned in the post-cast concrete 11, and the anchor bolts 9 are positioned on one side of the sealing plate 7 and are also positioned in the post-cast concrete 11;
when the assembled supporting structure needs to be dismantled after the assembled supporting structure is used, the connection relation between the sealing plate 7 and the prefabricated supporting segments 1 and between the prefabricated supporting segments 1 is removed, and the prefabricated supporting segments 1 are recycled.
In the above steps, the prefabricated support can be installed in advance, the reserved end portion U-shaped steel plate 12 and the reserved anchor bolt 9 are placed, and finally the crown beam 2 and the post-cast concrete 11 are constructed and poured. In fact, when the fabricated supporting structure is used for supporting the crown beam 2, it is only necessary that the prefabricated supporting section 1 at one end position is matched with the conversion part 17 through the tensioning assembly 6, and the prefabricated supporting section 1 at the other end position is abutted against the corresponding crown beam 2, that is, it is only necessary that one end is adjusted through the jack 15, which is more convenient.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a foundation ditch assembled bearing structure, includes a plurality of prefabricated support segments that can splice in proper order, its characterized in that: the foundation pit supporting structure further comprises a conversion part which is detachably arranged on one prefabricated supporting section and is just opposite to the foundation pit crown beam, and a tensioning assembly which can abut against the crown beam and the conversion part, wherein the tensioning assembly is arranged between the crown beam and the conversion part, two ends of the tensioning component respectively abut against the crown beam and the conversion part, each prefabricated supporting section comprises a supporting section and two end plates which are oppositely arranged, the two end plates are respectively positioned at two end parts of the supporting section, the two adjacent prefabricated supporting sections are spliced through the end plates, the prefabricated support sections positioned at the end parts are provided with sealing plates which are opposite to the crown beams and are connected with the crown beams through cast-in-place concrete, the sealing plates are detachably connected with the corresponding end plates, and the tensioning assembly is positioned on the outer side of the cast-in-place concrete and comprises a jack and a cushion column which can be positioned on the same straight line with the jack.
2. The fabricated foundation pit support structure of claim 1, wherein: the number of the tensioning assemblies is at least two, and the tensioning assemblies are uniformly arranged along the circumferential direction of the sealing plate.
3. The fabricated foundation pit support structure of claim 1, wherein: the support section is shaped steel, the shaped steel includes two H shaped steel, and two the H shaped steel welds into two H shaped steel structures side by side, two the H shaped steel is located two between the end plate.
4. The fabricated foundation pit support structure of claim 3, wherein: and a stiffening plate is arranged on the profile steel, and the conversion piece is detachably arranged on the stiffening plate of the prefabricated support section at the end part.
5. A support construction method, characterized in that the fabricated support structure of claim 1 is adopted, and the method comprises the following steps:
selecting prefabricated support sections with different lengths according to the section type of the prefabricated support, and conveying the prefabricated support sections to a construction site;
connecting each prefabricated support section according to the width of the foundation pit;
pouring a crown beam, and embedding a U-shaped steel plate and embedded steel bars;
the spliced prefabricated support sections are transported to corresponding positions of the crown beams and placed on the pre-buried U-shaped steel plates;
the conversion part is fixedly installed on the prefabricated support sections, the tensioning assembly is arranged between the conversion part and the crown beam, one end of the jack props against the conversion part, the other end of the jack props against the crown beam through the cushion column, and the connection gap between the prefabricated support sections is eliminated by adjusting the tensioning assembly;
the tensioning assembly is released, and the conversion piece is detached for recycling;
connecting the sealing plate and the embedded steel bars, and then connecting and fixing the sealing plate and the end plates of the prefabricated support sections at the end parts;
pouring concrete after pouring by taking the U-shaped steel plate and the sealing plate as templates;
when the supporting structure plays a role and needs to be dismantled, the connection relation between the sealing plate and the prefabricated supporting segments and between the prefabricated supporting segments is removed, and the prefabricated supporting segments are reused.
6. The support construction method of claim 5, wherein: the shear key is arranged on one side, facing the crown beam, of the sealing plate, and the sealing plate is connected with the end plates of the prefabricated support segments at the end positions through anchor bolts.
7. The support construction method of claim 5, wherein: the seal plate is clamped in the U-shaped steel plate.
8. The support construction method of claim 5, wherein: the prefabricated supporting section at one end position is matched with the conversion part by adopting a tensioning assembly, and the prefabricated supporting section at the other end position is propped against the corresponding crown beam.
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| CN202010116141.5A CN111395351B (en) | 2020-02-25 | 2020-02-25 | Assembled supporting structure of foundation pit and supporting construction method |
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| CN202010116141.5A CN111395351B (en) | 2020-02-25 | 2020-02-25 | Assembled supporting structure of foundation pit and supporting construction method |
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| CN112030986A (en) * | 2020-07-31 | 2020-12-04 | 中铁第四勘察设计院集团有限公司 | Combined steel pipe concrete waist beam structure, prefabricated member, connecting joint and construction method |
| CN112030990A (en) * | 2020-07-31 | 2020-12-04 | 中铁第四勘察设计院集团有限公司 | Assembled concrete-filled steel tube supporting system and construction method thereof |
| CN111927464B (en) * | 2020-08-14 | 2023-01-31 | 中建三局集团有限公司 | Prefabricated assembled shaft inner supporting structure |
| CN112127369A (en) * | 2020-08-31 | 2020-12-25 | 中铁第四勘察设计院集团有限公司 | Fabricated foundation pit steel supporting structure and construction method thereof |
| CN112359843A (en) * | 2020-10-14 | 2021-02-12 | 中铁第四勘察设计院集团有限公司 | Hoop-bolt mixed node, foundation pit inner support structure and construction method |
| CN112323817A (en) * | 2020-11-24 | 2021-02-05 | 中铁第四勘察设计院集团有限公司 | Pre-tensioning precast concrete supporting member, inner supporting system and construction method |
| CN112502165A (en) * | 2020-12-11 | 2021-03-16 | 陆永芳 | Reusable foundation pit PHC supporting member and construction method thereof |
| CN113373944B (en) * | 2021-07-15 | 2024-09-13 | 中建八局轨道交通建设有限公司 | Concrete support mounting structure and mounting and dismounting method |
| CN115162365B (en) * | 2022-09-07 | 2022-12-02 | 中冶建筑研究总院有限公司 | Support deformation control device, operation method thereof and kiloton-level support structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8713006U1 (en) * | 1987-09-26 | 1987-11-19 | Bilfinger + Berger Bauaktiengesellschaft, 6800 Mannheim | Shoring support |
| CN201785758U (en) * | 2010-07-30 | 2011-04-06 | 上海市第五建筑有限公司 | Foundation pit supporting system |
| CN202012046U (en) * | 2011-03-01 | 2011-10-19 | 浙江华铁建筑安全科技股份有限公司 | Supporting beam for formwork of high-speed rail |
| CN205975635U (en) * | 2016-08-24 | 2017-02-22 | 江西铜钹建设工程有限公司 | Foundation pit support structure |
| CN209798768U (en) * | 2019-03-15 | 2019-12-17 | 安徽建筑大学 | Assembled foundation pit concrete beam inner support |
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