Foundation pit force transfer support changing method for high slope in complex environment

Abstract

The invention discloses a foundation pit force transfer support changing method for a high slope in a complex environment, and relates to the field of basement construction. According to the foundation pit force transferring and support changing method for the high slope in the complex environment, when a foundation pit is excavated, back pressure soil is reserved in a passive area at the bottom of the foundation pit, and basement bottom plates of a first batch of subareas and a second batch of subareas are alternately constructed according to subareas in a warehouse jumping mode; and after a plurality of bottom steel pipe inclined struts are arranged between a basement bottom plate and a fender post of a corresponding subarea obtained through construction, back pressure soil of the corresponding subarea is excavated, so that back pressure soil is locally arranged in a passive area for back pressure, and the bottom steel pipe inclined struts and back pressure soil unloading are alternately constructed to achieve the aim of supporting replacement. Various problems caused by the technical scheme that two supports are integrally needed to be changed into three supports or multiple rows of piles are adopted in a traditional construction method are solved, the construction cost can be effectively reduced, the construction period is shortened, energy is saved, environment is protected, and the safety of a foundation pit is ensured.

Description

Technical Field

[0001] The present application relates to the field of basement construction, and in particular to a method for transferring force and replacing supports in a foundation pit with a high slope in a complex environment. Background Art

[0002] Traditional foundation pit support forms mostly adopt the method of increasing horizontal internal supports or increasing the number of rows of retaining piles to solve the safety hazards of deep foundation pits due to the existence of local high slopes and complex surrounding environments. For example, three internal supports and retaining piles or multiple rows of retaining piles and two internal supports are adopted. The basement floor and the post-cast joints of each floor slab use traditional pre-buried I-beams as force transmission devices.

[0003] However, the above-mentioned foundation pit support method will greatly increase the cost of foundation pit support because the overall support is changed from two to three or multiple rows of piles are used. At the same time, the construction period will be delayed due to the increase in the construction and removal of concrete supports. It will also lead to increased noise, wastewater, and dust at the construction site, and generate a large amount of concrete waste, which is not economical and environmentally friendly. Summary of the Invention

[0004] The purpose of this application is to provide a method for transferring force and replacing supports in foundation pits with high slopes in complex environments, which can effectively reduce engineering costs, save construction time, and be energy-efficient and environmentally friendly, thereby ensuring the safety of foundation pits.

[0005] This application is implemented as follows: The present application provides a method for transferring force and replacing support in a foundation pit of a high slope in a complex environment, comprising the following steps: S100. Excavate the foundation pit to the basement top slab and construct the first concrete inner support. Install multiple top steel pipe diagonal braces between the first concrete inner support and the retaining piles. S200, excavate the foundation pit to the first floor slab of the basement to obtain the second concrete internal support; S300: Excavate the foundation pit to the bottom and reserve counter-pressure soil in the passive area at the bottom of the foundation pit. Construct the basement floor of the first batch of sections in sections from one end of the foundation pit to the other. S400, constructing the basement floors of the second batch of partitions in a jump-situation manner according to the construction method of the basement floors of the first batch of partitions; S500, construct the third and second floor slabs of the basement from bottom to top, and remove the bottom steel pipe diagonal bracing and the second concrete internal support; S600, construct the first floor slab and concrete inclined beams of the basement, and remove the first concrete internal support and the first steel pipe diagonal support; S700, construction of basement roof.

[0006] In some optional implementation schemes, when multiple top steel pipe diagonal braces are set between the first concrete support and the retaining piles, a top diagonal brace lower corbel is set at the top of the column pile of the first concrete support, and a top purlin and a top diagonal brace upper corbel are set on the top crown beam of the retaining pile corresponding to the high slope, and the two ends of the top steel pipe diagonal brace are respectively connected to the top diagonal brace upper corbel and the top diagonal brace lower corbel.

[0007] In some optional implementation schemes, when skipping the construction of the basement floors of the first batch of partitions, the foundation pit is divided into multiple partitions arranged in sequence from one end to the other, and the even-numbered partitions are skipped to obtain the basement floors of the first batch of partitions.

[0008] In some optional implementation schemes, when skipping the construction of the basement floor of the first batch of partitions, the basement floor of the first batch of partitions away from the high slope side is constructed first, and bottom steel pipe diagonal braces are arranged at intervals between the corresponding basement floor and the retaining piles on the inner side of the high slope foundation pit, the lower corbel of the bottom diagonal brace is connected to the basement floor, the upper corbel of the bottom diagonal brace is constructed on the retaining piles on the inner side of the high slope foundation pit, the two ends of the bottom steel pipe diagonal brace are respectively connected to the upper corbel of the bottom diagonal brace and the lower corbel of the bottom diagonal brace, the back pressure soil in the passive zone of the first batch of partitions is excavated, and the basement floor of the first batch of partitions close to the high slope side is constructed.

[0009] In some optional implementation schemes, when the basement floors of the first batch of partitions close to the high slope are constructed, the first batch of partitions cast first on the side away from the high slope are connected to the corresponding later cast basement floors of the first batch of partitions close to the high slope through a sunken force transmission device.

[0010] In some optional implementation schemes, when constructing the basement floors of the first batch of partitions and the second batch of partitions, the first-cast basement floors and the later-cast basement floors are connected by a sunken later-cast force transfer plate.

[0011] In some optional implementation schemes, when constructing the third floor slab and the second floor slab of the basement, the first-cast floor slab and the later-cast floor slab are connected by a later-cast joint force-transmitting I-steel.

[0012] In some optional implementation schemes, before removing the first concrete internal support and the first steel pipe diagonal support, multiple concrete diagonal beams are set between the first basement floor slab and the retaining piles for support.

[0013] In some optional implementation schemes, before removing the first concrete inner support and the first steel pipe diagonal support, a middle purlin is constructed on the side wall of the retaining pile, and the tops of each concrete diagonal beam are connected to the middle purlin.

[0014] In some optional implementation schemes, after the basement roof is constructed, the concrete inclined beams and the central purlins are removed.

[0015] The beneficial effects of the present application are as follows: the force transmission and support replacement method for foundation pits with high slopes under complex environments provided by the present application reserves counter-pressure soil in the passive zone at the bottom of the foundation pit when excavating the foundation pit, and constructs the basement floors of the first and second partitions alternately according to the partition jump warehouse, and sets multiple bottom steel pipe diagonal supports between the basement floors of the corresponding partitions and the retaining piles during construction, and then excavates the counter-pressure soil of the corresponding partitions, thereby locally adopting the counter-pressure soil in the passive zone, and alternating the bottom steel pipe diagonal supports with the counter-pressure soil unloading to achieve the purpose of support replacement, solving various problems caused by the technical solution of changing two supports to three supports or using multiple rows of piles in the traditional construction method, which can effectively reduce the project cost, save construction period, save energy and protect the environment, and ensure the safety of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic flow chart of a method for transferring support and replacing a foundation pit force on a high slope in a complex environment provided by an embodiment of the present application; Figure 2 A schematic diagram of the structure of the top steel pipe diagonal brace in the construction of a method for transferring and replacing support in a foundation pit with a high slope in a complex environment provided by an embodiment of the present application; Figure 3 A schematic diagram of the structure of the basement floor and bottom steel pipe diagonal bracing of the first batch of even-numbered partitions in the jump-storage construction of the method for transferring and replacing support for a foundation pit with a high slope in a complex environment provided by an embodiment of the present application; Figure 4 A schematic diagram of the structure of the second batch of partitioned basement floor slabs and bottom steel pipe diagonal braces obtained by constructing the force-transferring and bracing-changing method for a foundation pit with a high slope in a complex environment provided by an embodiment of the present application; Figure 5 A schematic diagram of a partial cross-sectional structure of the basement floor of the first batch of even-numbered partitions in the jump-storage construction of the foundation pit force transmission and support replacement method for high slopes in a complex environment provided by an embodiment of the present application; Figure 6 A schematic diagram of a partial cross-section of the structure behind the sunken force transmission device in the basement floor of the first batch of even-numbered partitions during the jump-over construction in the method for transferring support and replacing foundation pits on high slopes in a complex environment provided by an embodiment of the present application; Figure 7A schematic diagram of a partial cross-section of the structure during the construction of the third basement floor slab and the second basement floor slab from bottom to top and the removal of the bottom plate steel pipe diagonal brace and the second concrete inner support in the method for transferring and replacing support for a foundation pit on a high slope in a complex environment provided by an embodiment of the present application; Figure 8 A schematic diagram of the structure after the concrete inclined beams and the middle purlin are removed during the construction of the basement top slab in the method for transferring and replacing support in a foundation pit on a high slope in a complex environment provided by an embodiment of the present application; Figure 9 This is a schematic diagram of the partial cross-sectional structure of the sunken force transmission device in the foundation pit force transmission and support replacement method for high slopes in complex environments provided by an embodiment of the present application.

[0018] In the figure: 100, basement top plate; 110, basement first floor plate; 120, basement second floor plate; 130, basement third floor plate; 140, basement bottom plate; 150, first concrete internal support; 160, second concrete internal support; 170, top steel pipe diagonal brace; 171, top diagonal brace lower corbel; 172, top diagonal brace upper corbel; 180, counter pressure soil; 190, bottom steel pipe diagonal brace; 191, bottom 192. Bottom diagonal brace lower corbel; 200. Partition No. 1; 210. Partition No. 2; 220. Partition No. 3; 230. Partition No. 4; 240. Partition No. 5; 250. Sunken force transmission device; 251. Cushion layer; 252. Bottom plate layer; 253. Settlement joint; 254. Post-cast strip; 255. Waterstop steel plate; 256. External rubber waterstop; 260. Post-cast strip force transmission I-beam; 270. Concrete diagonal beam. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0024] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0025] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0026] The following is a further detailed description of the characteristics and performance of the force transmission and support replacement method for a foundation pit with a high slope in a complex environment of the present application in conjunction with the embodiments.

[0027] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown, the embodiment of the present application provides a method for transferring force and replacing support in a foundation pit of a high slope in a complex environment, comprising the following steps: S100. Excavate the foundation pit to the basement top slab 100, i.e., the B0 slab. Construct a horizontally arranged first concrete internal support 150 at the basement top slab 100, and arrange top steel pipe diagonal braces 170 arranged at intervals between the first concrete internal support 150 and the retaining piles. When constructing the top steel pipe diagonal braces 170, arrange a diagonal brace plan at the pile tops of the column piles of the first concrete internal support 150, and arrange anchor plates at the pile tops of the column piles of the first concrete internal support 150 to connect the top diagonal brace lower corbel 171. Construct a top perimeter purlin and a top diagonal brace upper corbel 172 connected to the top perimeter purlin on the crown beam of the retaining pile corresponding to the high side slope. Install the top steel pipe diagonal brace 170 so that the top and bottom of the top steel pipe diagonal brace 170 are respectively connected to the corresponding top diagonal brace upper corbel 172 and top diagonal brace lower corbel 171, so that the top steel pipe diagonal brace 170 and the horizontally arranged first concrete internal support 150 form a steel-concrete internal support system.

[0028] S200, continue excavating the foundation pit until the first basement floor slab 110B1 is constructed to obtain a second horizontally arranged concrete inner support 160; S300, continue to excavate the foundation pit to the bottom of the foundation pit, and divide the foundation pit into No. 1 partition 200, No. 2 partition 210, No. 3 partition 220, No. 4 partition 230 and No. 5 partition 240 from one end to the other, and reserve 180 of counter-pressure soil in the passive area of ​​the pit bottom close to the high slope of each partition of the foundation pit, and construct the basement floor 140 of the first batch of even-numbered partitions in a skipped manner according to the partition, that is, construct the basement floor 140 of No. 2 partition 210 and No. 4 partition 230; during construction, first construct the basement floor 140 of the first batch of partitions No. 2 partition 210 and No. 4 partition 230 away from the high slope. , and set up bottom steel pipe diagonal braces 190 at intervals between the corresponding basement floor 140 and the inner retaining piles of the high slope foundation pit, connect the bottom diagonal brace lower corbel 191 to the basement floor 140, construct the bottom diagonal brace upper corbel 192 on the retaining piles inside the high slope foundation pit, connect the two ends of the bottom steel pipe diagonal brace 190 to the bottom diagonal brace upper corbel 192 and the bottom diagonal brace lower corbel 191 respectively, then excavate the passive area counter pressure soil 180 in the first batch of partitions No. 2, partition 210 and No. 4, partition 230, and obtain the basement floor 140 of the first batch of partitions No. 2, partition 210 and No. 4, partition 230 close to the high slope side; When the basement floors 140 of the first batch of partitions No. 2, partition 210, and No. 4, partition 230 close to the high slope side are obtained during construction, the first batch of partitions No. 2, partition 210, and No. 4, partition 230 away from the high slope side cast first basement floors 140 are connected to the corresponding later cast basement floors 140 of the first batch of partitions close to the high slope side using a sunken force transmission device 250; The sunken force transmission device 250 includes a cushion layer 251 with a sinking section and a bottom plate layer 252 arranged on the cushion layer 251. The bottom plate layer 252 is provided with a post-cast strip 254 located above the settlement joint 253. Waterstop steel plates 255 are respectively provided at both ends of the post-cast strip 254. The two ends of the waterstop steel plate 255 are respectively arranged in the bottom plate layer 252 and the post-cast strip 254. The bottom of the settlement joint 253 is provided with an external rubber waterstop 256 for sealing it.

[0029] S400, construct the basement floors 140 of the second batch of partitions, namely, partition 1 200, partition 3 220, and partition 5 240; during construction, first construct the basement floors 140 of the second batch of partitions, partition 1 200, partition 3 220, and partition 5 240, which are far away from the high slope side, and set the bottom steel pipe diagonal braces 190 arranged at intervals between the corresponding basement floors 140 and the inner retaining piles of the high slope foundation pit, and connect the bottom diagonal braces to the bottom of the basement floors 140. Leg 191, construct the bottom diagonal brace upper corbel 192 on the retaining pile inside the high slope foundation pit, connect the two ends of the bottom steel pipe diagonal brace 190 to the bottom diagonal brace upper corbel 192 and the bottom diagonal brace lower corbel 191 respectively, excavate the back pressure soil 180 in the passive area of ​​the second batch of partitions No. 1 partition 200, No. 3 partition 220 and No. 5 partition 240, and construct the basement floor 140 of the second batch of partitions No. 1 partition 200, No. 3 partition 220 and No. 5 partition 240 on the side close to the high slope; When the second batch of basement floors 140 of partition No. 1 200, partition No. 3 220 and partition No. 5 240 close to the high slope side are obtained during construction, the first-cast basement floors 140 of partition No. 1 200, partition No. 3 220 and partition No. 5 240 away from the high slope side are connected to the corresponding later-cast basement floors 140 close to the high slope side using a sunken force transmission device 250; S500, construct the third basement floor slab 130, i.e., B3 slab, and the second basement floor slab 120, i.e., B2 slab, from bottom to top, and remove the bottom steel pipe diagonal brace 190 and the second concrete inner support 160; when constructing the third basement floor slab 130 and the second basement floor slab 120, connect the first-cast floor slab and the later-cast floor slab of the corresponding floor slabs through the post-cast joint force-transmitting I-steel 260.

[0030] S600, construct the first basement floor slab 110, i.e., the B1 slab. Construct the central purlin on the side walls of the retaining piles, and construct spaced concrete diagonal beams 270, so that the top and bottom of each concrete diagonal beam 270 connect the purlin and the first basement floor slab 110, respectively. Then, remove the first concrete inner support 150 and the first steel pipe diagonal brace. S700, construct the basement top plate 100, namely B0 plate, and remove the concrete inclined beam 270 and the middle purlin.

[0031] The method for transferring force and replacing support in a foundation pit with a high slope in a complex environment provided by the embodiment of the present application has the following advantages: 1. When excavating the foundation pit, counter-pressure soil 180 is reserved in the passive area at the bottom of the foundation pit, and the basement floors 140 of the first batch of even-numbered partitions and the second batch of odd-numbered partitions are constructed alternately according to the partition skipping. After the basement floors 140 of the corresponding partitions are constructed and multiple bottom steel pipe diagonal braces 190 are set between the retaining piles, the counter-pressure soil 180 of the corresponding partitions is excavated. In this way, the purpose of replacing supports is achieved by locally setting counter-pressure soil 180 in the passive area and unloading the bottom steel pipe diagonal braces 190 and the counter-pressure soil 180 by alternating construction. This solves various problems caused by the technical solutions of changing from two supports to three supports or using multiple rows of piles in traditional construction methods. This can effectively reduce project costs, save construction time, and save energy and protect the environment, thereby ensuring the safety of the foundation pit.

[0032] 2. When a top steel pipe diagonal brace 170 is provided between the first concrete inner support 150 and the retaining pile at the basement top plate 100, the existing structure of the lattice columns and structural columns of the basement top plate 100 is used to support the top steel pipe diagonal brace 170 to achieve the purpose of partial bracing replacement. This can save on the construction of the supporting structure while ensuring the safety of the foundation pit, and solve the problems of high cost, long construction period and environmental pollution of the traditional bracing replacement method.

[0033] 3. When constructing the basement floor 140 of each partition, the first-cast basement floor 140 on the side away from the high slope of each partition is connected to the corresponding later-cast basement floor 140 on the side close to the high slope by a sunken force transmission device 250 without the need to bury I-beam force transmission components. By combining the external rubber waterstop and the extruded board in the sunken force transmission plate belt of the sunken force transmission device 250, the purpose of advanced waterstopping of the basement floor 140 and mechanical transmission of the later-cast belt is achieved, without the risk of leakage, and more economical and faster.

[0034] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

Claims

1. A method for transferring force and replacing support in a foundation pit of a high slope under complex environment, characterized in that: The following steps are involved: S100, excavate the foundation pit to the basement top slab, construct the first concrete inner support, and install multiple top steel pipe diagonal braces between the first concrete inner support and the retaining piles; S200, excavate the foundation pit to the first floor slab of the basement to obtain the second concrete internal support; S300: Excavate the foundation pit to the bottom and reserve counter-pressure soil in the passive area at the bottom of the foundation pit. Construct the basement floor of the first batch of sections in sections from one end of the foundation pit to the other. S400, constructing the basement floors of the second batch of partitions in a jump-situation manner according to the construction method of the basement floors of the first batch of partitions; S500, construct the third and second floor slabs of the basement from bottom to top, and remove the bottom steel pipe diagonal bracing and the second concrete internal support; S600, construct the first floor slab and concrete inclined beams of the basement, and remove the first concrete internal support and the first steel pipe diagonal support; S700, construction of basement roof.

2. The method for transferring force and replacing support for foundation pits with high slopes in complex environments according to claim 1 is characterized in that: When multiple top steel pipe diagonal braces are set between the first concrete inner support and the retaining piles, a top diagonal brace lower corbel is set at the top of the column pile of the first concrete inner support, a top purlin and a top diagonal brace upper corbel are set on the top crown beam of the retaining pile corresponding to the high slope, and the two ends of the top steel pipe diagonal brace are respectively connected to the top diagonal brace upper corbel and the top diagonal brace lower corbel.

3. The method for transferring force and replacing support for foundation pits with high slopes in complex environments according to claim 1 is characterized in that: When skipping the construction of the first batch of partitioned basement floors, the foundation pit is divided into multiple partitions arranged in sequence from one end to the other, and the even-numbered partitions are skipped to obtain the first batch of partitioned basement floors.

4. The method for transferring force and replacing support for foundation pits with high slopes in complex environments according to claim 1 is characterized in that: When skipping the construction of the basement floor of the first batch of partitions, the basement floor of the first batch of partitions away from the high slope side is constructed first, and bottom steel pipe diagonal braces are arranged at intervals between the corresponding basement floor and the retaining piles on the inner side of the high slope foundation pit, the bottom diagonal brace lower corbel is connected to the basement floor, the bottom diagonal brace upper corbel is constructed on the retaining piles on the inner side of the high slope foundation pit, the two ends of the bottom steel pipe diagonal brace are respectively connected to the bottom diagonal brace upper corbel and the bottom diagonal brace lower corbel, the back pressure soil in the passive zone of the first batch of partitions is excavated, and the basement floor of the first batch of partitions close to the high slope side is constructed.

5. The method for transferring force and replacing support for foundation pits with high slopes in complex environments according to claim 4 is characterized in that: When the basement floors of the first batch of partitions close to the high slope are obtained during construction, the first batch of partitions on the side away from the high slope that are cast first are connected to the corresponding later cast basement floors of the first batch of partitions close to the high slope through a sunken force transmission device.

6. The method for transferring force and replacing support for foundation pits with high slopes in complex environments according to claim 1 is characterized in that: When constructing the basement floors of the first batch of partitions and the second batch of partitions, the basement floors cast first and the basement floors cast later are connected by a sunken later-cast force transfer plate.

7. The method for transferring force and replacing support for foundation pits with high slopes in complex environments according to claim 1 is characterized in that: When constructing the third and second floor slabs of the basement, the first poured floor slab and the later poured floor slab are connected by the later poured joint force-transmitting I-steel.

8. The method for transferring force and replacing support for foundation pits with high slopes in complex environments according to claim 1 is characterized in that: Before removing the first concrete internal support and the first steel pipe diagonal brace, multiple concrete diagonal beams are set between the first floor slab of the basement and the retaining piles for support.

9. The method for transferring force and replacing support for a foundation pit on a high slope in a complex environment according to claim 8 is characterized in that: Before removing the first concrete inner support and the first steel pipe diagonal support, a middle purlin is constructed on the side wall of the retaining pile, and the tops of the various concrete diagonal beams are connected to the middle purlin.

10. The method for transferring force and replacing support for a foundation pit of a high slope in a complex environment according to claim 9, characterized in that: After the basement roof is constructed, the concrete inclined beams and the middle purlins are removed.

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